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Home My WebLink About1.0 ApplicationGARFIELD COUNTY Building & Planning Department 108 8th Street, Suite 401 Glenwood Springs, Colorado 81601 Telephone: 970.945.8212 Facsirnile: 970.384.3470 www.corfield-countv.com Special Use Permit GENERAL INFORMATION (To be completed by the applicant.) 3/4 Street Address / General Location of Property:_From the intersection of 7th St. & CR 320, Go 2.5 miles to the south west on CR 320 to the location. 3 Legal Description: West % sw' Section 20, Township 6 South, Range 93 West of the P.M. % Existing Use & Size of Property in acres: Irrigated Pasture Land, 2.67 Acres 3/ Description of Special Use Requested: Gravel storage lot. (Lay Down Yard) 3/4 Zone District: ARRD 3/ Name of Property Owner (Applicant): Douglas C. McLeod 3/ Address: 518 17th St. Suite 1455 Telephone: 303-893-5400 3/ City: Denver State: CO Zip Code: 80202 FAX: 3/4 Name of Owner's Representative, if any (Attorney, Planner, etc): Wagon Wheel Consulting, inc 3 Address: 111 East 3`d Suite 213 Telephone: 970-625-8433 3/ City: Rifle State: CO Zip Code: 81650 FAX: 970-625-8435 a Doc. No.: STAFF USE ONLY Date Submitted: TC Date: 3/ Planner: Hearing Date: • c. The site shall be posted such that the notice is clearly and conspicuously visible from a public right-of-way, with notice signs provided by the Planning Department. The posting must take place at least thirty (30) but not more than sixty (60) days prior to the hearing date and is the sole responsibility of the applicant to post the notice, and ensure that it remains posted until and during the date of the hearing. 4. The Applicant is required to appear before the Board of County Commissioners at the time and date of the public hearing at which time the Board will consider the request. In addition, the Applicant shall provide proof, at the hearing, that proper notice was provided. 5. Once the Board makes a decision regarding the Special Use request, Staff will provide the Applicant with a signed resolution memorializing the action taken by the Board. Following the Board's approval, this office will issue the Special Use Permit to the applicant. If the Board's approval includes specific conditions of approval to be met, this office will not issue the Official Special Use Permit certificate until the applicant has satisfied all conditions of approval. The Special Use Permit approval is not finalized until this office has issued the Official Special Use Permit certificate signed by the Chairman of the Board of County Commissioners. I have read the statements above and have provided the required attached information which is correct and accurate to the best of my knowledge. gnature f applicantlowner) Last Revised: 11/07/2002 • GARFIELD COUNTY BUILDING AND PLANNING DEPARTMENT AGREEMENT FOR PAYMENT FORM (Shall he submitted with application) GARFIELD COUNTY (hereinafter COUNTY) and War? 6 nr 1.4) keel Cones ul t/N?) .TA/C. (hereinafter APPLICANT) agree as follows: 1. APPLICANT has submitted to COUNTY an application for j1ei.e ,d iRo e 1 L)aw N Ya (hereinafter, THE PROJECT). 2. APPLICANT understands and agrees that Garfield County Resolution No. 98-09, as amended, establishes a fee schedule for each type of subdivision or land use review applications, and the guidelines for the administration of the fee structure. 3. APPLICANT and COUNTY agree that because of the size, nature or scope of the proposed project, it is not possible at this time to ascertain the full extent of the costs involved in processing the application. APPLICANT agrees to make payment of the Base Fee, established for the PROJECT, and to thereafter permit additional costs to be billed to APPLICANT. APPLICANT agrees to make additional payments upon notification by the COUNTY when they are necessary as costs are incurred. 4. The Base Fee shall be in addition to and exclusive of any cost for publication or cost of itnsulting service determined necessary by the Board of County Commissioners for the consideration of an plication or additional COUNTY staff time or expense not covered by the Base Fee. If actual recorded costs exceed the initial Base Fee, APPLICANT shall pay additional billings to COUNTY to reimburse the COUNTY for the processing of the PROJECT mentioned above. APPLICANT acknowledges that all billing shall be paid prior to the final consideration by the COUNTY of any land use permit, zoning amendment, or subdivision plan. APPLICANT } //plod / SignaG Date: /C1-,. 7- 4 2 LT/m/1y LJ.5�� Print Name Mailing Address: 111 Eau 3Rd e74 SUfk .z l,' 'irk., CO 8/456 Of2a1}4 Page 4 e PETR:®GULF October 27, 2006 CORPOR A TION Mr. Fred A. Jarman, AICP Garfield County Building & Planning Department 108 8'h Street, Suite 401 Glenwood Springs, CO 81601 Re: Agent Authorization Dear Mr. Jarman, Wagon Wheel Consulting, Inc. (Mr. Jimmy Smith) has been retained by Petrogulf Corporation to request Garfield County Special Use Permits for the Petrogulf Storage Yard and a second dwelling, bated on the McLeod property, approximately 2 miles south of Rifle, Colorado on Taugenbaugh Mesa, I authorize Wagon Wheel Consulting, Inc. to act as agent on behalf of Petrogulf Corporation. Please call me at 303-893-5400, extension 117, if you have any questions or concerns. Sincerely, Charles W. Goodin Manager of Land and Legal 518 Seventeenth Street • Suite 1455 • Denver, Colorado 80202 Telephone: (303) 893-5400 • Fax: (303) 893-0519 • info@petrogulf.com TOTAL P.02 PROJECT DESCRIPTION •Douglas C. McLeod (c/o Petrogulf Corporation) proposes to construct, operate, and maintain a lay down yard for the purpose of storing pipe, valves, fittings, and other associated equipment associated with their oil and gas operations. The lay down yard will be constructed on a 41 acre parcel of land owned my Douglas C. McLeod which is located approximately 2 miles south west of the City of Rifle within Section 20, Township 6 South, Range 93 West. The area is more commonly referred to as Taughenbaugh Mesa. The property was formerly owned by Gay Leo. The actual size of the proposed lay down yard will be 2.67 acres. Current use of the property consists of irrigated pasture land. Access into the proposed site will be from an existing, approved access off of County Road 320. The access is currently utilized to access an existing natural gas well pad located on an adjacent property. Future well pads are proposed on the McLeod Property. The surface of the site is planned to be gravel. Construction of the site would include grading to a near flat surface and compaction of the soil to a satisfactory level. Rock would be installed as a base then capped with a minimum of 6" of3/4 road base. The site would then be graveled with screened gravel. Periodic watering and resurfacing may be required to prevent fugitive dust emissions. Storm water controls will be implemented to insure drainage control. The lay down yard will be equipped with pipe racks and storage bins. The pipe racks, which are approximately 3' high, 15' wide, and 30' long, will be used to store surplus pipeline and drill pipe to be utilized in future projects. Steel container boxes will be installed to house pipe fittings, valves, and other miscellaneous equipment used for operations and construction projects. These container boxes will be skid mounted, portable boxes that are approximately 8' x 40' in size. The actual number of both pipe racks and container boxes will vary as to the volume of pipe and equipment needing to be stored. The proposed site will be fenced on all four sides to prevent potential harm to wildlife as well as the general public. The fence along the east side of the site will be slatted to help mitigate visual impacts. Two gates will be installed that will be locked for security purposes. The site will be unmanned, but will be visited by appropriate personnel. Impact mitigation to wildlife and a noxious weed management plan are included within this application packet for review. PURPOSE & NEEDS Current operations require that all construction and drilling materials be delivered from vender facilities located outside of the operating area. Multiple trips to deliver these goods to the designated locations are often required on a daily basis. These multiple trips, which impact the traffic on roads within the area, can be substantially reduced with the availability of the proposed lay down yard which is centrally located within the operating area. Surplus pipe and material are currently required to be stored on the well pads, with limited security, or hauled back to the vender's facilities then subsequently hauled out again to the next project. The lay down yard, located within the operating area, would eliminate at least a substantial portion of the time and distance required for delivery. Initially, until the lay down yard is stocked, the anticipated truck trips into the site would equal 2 to 3 truck trips per day. Subsequent truck trips could average 2 to 3 per week. On most days, no trips would be required from outside the operating area. Some items stored within the site would be delivered to future projects by smaller vehicles rather than the normal sized delivery trucks. PETROGULF CORPORATION IVICLEOD PROPERTY LAY DOWN YARD impact Statement 5.03 CONDITIONAL AND SPECIAL USES As listed under the Zone District Regulations, conditional and special uses shall conform to all requirements listed thereunder and elsewhere in this Resolution plus the following requirements: (1) Utilities adequate to provide water and sanitation service based on accepted engineering standards and approved by the Board of County Commissioners shall either be in place or shall be constructed in conjunction with the proposed use; (A97-60) . No potable water or sanitation service will be required for this lay down yard project. (2) Street improvements adequate to accommodate traffic volume generated by the proposed use and to provide safe, convenient access to the use shall either be in place or shall be constructed in conjunction with the proposed use; Petrogulf Corporation has applied to and received approval from Garfield County Road and Bridge for an "Access Permit" (Permit Number GRB05-D-111) off County Road 320 into the proposed site. Petrogulf agrees to comply with all general and special provisions as stipulated by the permit A copy of the permit is provided behind the "Associated Permits" tab in this application packet. The overall use of roads, for the purpose of hauling pipe and equipment to the operating area, should be significantly reduced due to the planned reduction in distances and time currently traveled by delivery trucks. (3) Design of the proposed use is organized to minimize impact on and from adjacent uses of land through installation of screen fences or landscape materials on the periphery of the lot and by location of intensively utilized areas, access points, lighting and signs in such a manner as to protect established neighborhood character; The proposed site was selected due to its proximity to the affected operating area. The site will be constructed within a portion of the property which provides the • • minimum impact to the surrounding area. Adjacent uses of lands surrounding the proposed site are primarily grazing and residential with several single family dwellings within a one mile radius. The terrain of the general area is described as flat mesa country. Petrogulf is willing to install slated fencing in order to minimize visual impacts. No lighting is planned for the site. Access into the proposed site already exist. Maintenance and dust control will be implemented on the existing gravel road. Petrogulf will pave the access shoulder adjacent to County Road 320 as set forth in the access permit stipulations. Additional specific requirements and prerequisites for certain uses are as follows: (A. 79-132) 5.03.07 Industrial Operations: Industrial Operations, including extraction, processing, fabrication, industrial support facilities, mineral waste disposal, storage, sanitary landfill, salvage yard, access routes and utility lines, shall be permitted, provided: (1) The applicant for a permit for industrial operations shall prepare and submit to the Planning Director ten (10) copies of an impact statement on the proposed use describing its location, scope, design and construction schedule, including an explanation of its operational characteristics. One (1) copy of the impact statement shall be filed with the County Commissioners by the Planning Director. The impact statement shall address the following: (A) Existing lawful use of water through depletion or pollution of surface run-off, stream flow or ground water; Petrogulf has an approved Storm Water Discharge Permit (Certification No: COR 038944) in affect for the Helmer Gulch Producing Field (See tab Storm Water Management Plan). The proposed site falls within the jurisdiction of this permit. The permit is valid through 08/30/07 and will be revised prior to the expiration date to include this and other facilities. See Tab "Hazardous Material Management & Spill Prevention" (B) Impacts on adjacent land from the generation of vapor, dust, smoke, noise, glare or vibration, or other emanations; There are no plans to store production fluids or other hazardous materials on this site; therefore, no vapor emissions are anticipated. Fugitive dust emissions will be mitigated by the periodic application of water or magnesium chloride to the existing road and lay down site as required. • The planned pipe racks and storage containers are generally considered "low profile", therefore the 8' fence with slatting is anticipated to be adequate to minimize visual impacts. Petrogulf will cooperate with the Garfield County Vegetation Manager to evaluate additional landscaping as recommended. The most potential for noise may come from intermittent truck traffic to and from the site. Truck traffic, already occurring in the general area, will be significantly reduced as a result of reduced total mileage currently being traveled by delivery trucks. (C) Impacts on wildlife and domestic animals through the creation of hazardous attractions, alteration of existing native vegetation, blockade of migration routes, use patterns or other disruptions; See"Wildlife Report and Impact Assessment" included within the packet behind tab "Wildlife Survey" (D) Affirmatively show the impacts of truck and automobile traffic to and from such uses and their impacts to areas in the County; The projected benefits and reduced impacts of the proposed lay down yard site are expected to be as a result of constructing the centrally located facility. The distance and time required for delivery trucks to transport materials from vender locations as opposed to transporting stored items at the site is significantly less. The anticipated truck trips will be reduced from 2 to 3 truck trips per day down to 2 to 3 per week. These trip numbers may vary dependant upon the area activity level.. (E) That sufficient distances shall separate such use from abutting property which might otherwise be damaged by operations of the proposed use(s); The site is located at least 50 feet from adjoining property lines. The selected location of the site was moved from the originall selected location to accommodate an adjacent landowner's request. The proposed site is now located to the most northerly and westerly portion of the property. (F) Mitigation measures proposed for all of the foregoing impacts identified and for the standards identified in Section 5.03.08 of this Resolution See Tabs: "Fire Control Measures"; "Storni Water Management Plan"; "Hazmat & Spill Prevention Plan"; Noxious Weed Management Plan; Wildlife Survey, and "Landscaping and Reclamation Plan" (2) Permits may be granted for those uses with provisions that provide adequate mitigation for the following: (A) A plan for site rehabilitation must be approved by the County Commissioners before a permit for conditional or special use will be issued; Prior to abandonment of the lay down yard, Petrogulf would contact the Garfield County Planning Director to arrange for a meeting and joint inspection of the site. This meeting and inspection would take place a minimum of 30 days prior to abandonment and would be held so that an agreement on an acceptable abandonment plan can be reached An Abandonment and Reclamation Plan would be developed to address appropriate issues and actions. See Tab: Landscaping and Reclamation Plan (B) The County Commissioners may require security before a permit for special or conditional use is issued, if required. The applicant shall furnish evidence of a bank commitment of credit, bond, certified check or other security deemed acceptable by the County Commissioners in the amount calculated by the County Commissioners to secure the execution of the site rehabilitation plan in workmanlike manner and in accordance with the specifications and construction schedule established or approved by the County Commissioners. Such commitments, bonds or check shall be payable to and held by the County Commissioners; (C) Impacts set forth in the impact statement and compliance with the standards contained in Section 5.03.08 of this Resolution. (A. 93-061) 5.03.08 Industrial Performance Standards: All industrial operations in the County shall comply with applicable County, State, and Federal regulations regulating water, air and noise pollution and shall not be conducted in a manner constituting a public nuisance or hazard. Operations shall be conducted in such a manner as to minimize heat, dust, smoke, vibration, glare and odor and all other undesirable environmental effects beyond the boundaries of the property in which such uses are located, in accord with the following standards; (1) Volume of sound generated shall comply with the standards set forth in the Colorado Revised Statutes at the time any new application is made. (A. 93-061) (2) Vibration generated: every use shall be so operated that the ground vibration inherently and recurrently generated is not perceptible, without instruments, at any point of any boundary line of the property on which the use is located; (3) Emissions of smoke and particulate matter: every use shall be operated so as to comply with all Federal, State and County air quality laws, regulations and standards; (4) Emission of heat, glare, radiation and fumes: every use shall be so operated that it does not emit heat, glare, radiation or fumes which substantially interfere with the existing use of adjoining property or which constitutes a public nuisance or hazard. Flaring of gases, aircraft warning signals, reflective painting of storage tanks, or other such operations which may be required by law as safety or air pollution control measures shall be exempted from this provision; (5) Storage area, salvage yard, sanitary landfill and mineral waste disposal areas (A97-112) (A) Storage of flammable or explosive solids or gases shall be in accordance with accepted standards and laws and shall comply with the national, state and local fire codes and written recommendationslcomments from the appropriate local protection district regarding compliance with the appropriate codes; (A97-112) (B) At the discretion of the County Commissioners, all outdoor storage facilities may be required to be enclosed by fence, landscaping or wall adequate to conceal such facilities from adjacent property; (A97-112) (C) No materials or wastes shall be deposited upon a property in such form or manner that they may be transferred off the property by any reasonably foreseeable natural causes or forces; (A97-112) (D) Storage of Heavy Equipment will only be allowed subject to (A) and (C) above and the following standards: (A97-112) 1. The minimum lot size is five (5) acres and is not a platted subdivision. 2. The equipment storage area is not placed any closer than 300 ft. from any existing residential dwelling. 3. All equipment storage will be enclosed in an area with screening at least eight (8) feet in height and obscured from view at the same elevation or lower. Screening may include berming, landscaping, sight obscuring fencing or a combination of any of these methods. 4. Any repair and maintenance activity requiring the use of equipment that will generate noise, odors or glare beyond the property boundaries will be conducted within a building or outdoors during the hours of 8 a.m. to 6 p.m., Mon. -Fri. 5. Loading and unloading of vehicles shall be conducted on private property and may not be conducted on any public right-of-way. (E) Any storage area for uses not associated with natural resources shall not exceed ten (10) acres in size. (A97-112) (F) Any lighting of storage area shall be pointed downward and inward to the property center and shaded to prevent direct reflection on adjacent property (A97- 112) (6) Water pollution: in a case in which potential hazards exist, it shall be necessary to install safeguards designed to comply with the Regulations of the Environmental Protection Agency before operation of the facilities may begin. All percolation tests or ground water resource tests as may be required by local or State Health Officers must be met before operation of the facilities may begin. Garfield County Application for Driveway Permit Person Obtaining Permit: Petro Gulf Application Date: 11/17/2005 County Road Number: 320 District: Silt Permit Number: GRR05-D-111 Termination Date: 2/1/2006 Inspector: Jake Mall hereby requests permission and authority from the Board of County Commissioners to construct a driveway approach (es) on the right-of-way off of County Road, 320,1887ft East of Intersection of CR 320 and CR 317 on CR 320, located on the North side of road for the purpose of obtaining access to property. Applicant submits herewith for the consideration and approval of the Board of County Commissioners, a sketch of the proposed installation showing all the necessary specification detail including: 1. Frontage of lot along road. 2, Distance from centerline of road to property line. 3. Number of driveways requested 4. Width of proposed driveways and angle of approach. 5. Distance from driveway to road intersection, if any.0 6. Size and shape of area separating driveways if more than one approach. 7. Setback distance of building(s) and other.structure improvements. 8. No unloading of equipment on county road, any damage caused to county road will be repaired at subdivision expense. 9. Responsible for two years from the date of completion. • General Provisions 1) The applicant represents all parties in interest, and affirms that the driveway approach (es) is to be constructed by him for the bona fide purpose of securing access to his property and not for the purpose of doing business or servicing vehicles on the road right of way. 2) The applicant shall furnish all labor and materials, perform all work, and pay all costs in connection with the construction of the driveway(s). All work shall be completed within thirty (30) days of the permit date. 3) The type of construction shall be as designated and/or approved by the Board of County Commissioners or their representative and all materials used shall be of satisfactory quality and subject to inspection and approval of the Board of County Commissioners or their representative. 4) The traveling public shall be protected during the installation with proper warning signs and signals and the Board of County Commissioners and their duly appointed agents and employee shall be held harmless against any action for personal injury or property damage sustained by any reason of the exercise of the Permit. 5) The Applicant shall assume responsibility for the removal or clearance of snow, ice, or sleet upon any portion of the driveway approach (es) even though deposited on the driveway(s) in the course of the County snow removal operations. • 6) In the event it becomes necessary to remove any right-of-way fence, the posts on either side of the entrance shall be surely braced before the fence is cut to prevent any slacking of the remaining fence and all posts and wire removed shall be turned over to the District Road Supervisor of the Board of County Commissioners. 7) No revisions or additions shall be made to the driveway(s) or its appurtenances on the right-of-way without written permission of the Board of County Commissioners. 8) Provisions and specifications outlined herein shall apply on all roads under the jurisdiction of the Board of County Commissioners of Garfield County, Colorado, and the Specifications, set forth on the attached hereof and incorporated herein as conditions hereof. 9) Final inspection of driveway will be required upon completion and must be approved by person issuing permit or representative of person issuing permit. The inspection and sign off must be done prior to any CO from the Building and Planning Department being issued. Special Conditions: 1. Driveway Width- 100ft 2. Culvert required? True Size: 15 inch by 100ft 3. Asphalt or concrete pad required? True Size of pad: 100'Wide X 20' Long X 4" Thick 4. Gravel portion required? True Length: 100ft 5. Trees, brush and/or fence need to be removed. for visibility? False 6. Distance and Direction: 7. Certified Traffic Control Required? False S. Work zone signs required? True In signing this application and upon receiving authorization and permission to install the driveway approach (es) described herein the Applicant signifies that he has read, understands and accepts the foregoing provisions and conditions nd agrees to construct the driveway(s) in accordance with the accompanying specification plan reviewed and approved by the Board of County Commissioners. Signed: Address: Telephone Number: Permit granted 11/17/2005, subject to the provisions, specifications and conditions stipulated herein. For Board of County Commissioners' of Garfield County, Colorado: Representative of Garfield County Road and Bridge Signature • 410 • Specifications A driveway approach is understood to be that portion of the county road right -of way between the pavement edge and the property line that is designed and used for the interchange of traffic between the roadway and abutting property. 2. At any intersection, a driveway shall be restricted for a sufficient distance from the intersection to preserve the normal and safe movement of traffic. (It is recommended for rural residence entrances that a minimum intersection clearance of 50 feet be provided and for rural commercial entrances a minimum of 100 feet be provided.) 3. All entrances and exits shall be so located and constructed that vehicles approaching or using them will be able to obtain adequate sight distance in both directions along the county road in order to maneuver safely and without interfering with county road traffic. 4. The Applicant shall not be permitted to erect any sign or display material, either fixed or movable, on or extending over any portion of the county road right-of-way. 5. Generally, no more than one approach shall be allowed any parcel or property the frontage of which is less than . one hundred (100) feet. Additional entrances or exits for parcels having a frontage in excess of one hundred 100) feet shall be permitted only after showing of actual convenience and necessity. 6. All driveways shall be so located that the flared portion adjacent to the traveled way will not encroach upon adjoining property. 7. No commercial driveway shall have a width greater than thirty (30) feet measured at right angles to the centerline of the driveway except as increased by permissible radii. No noncommercial driveway shall have a width greater than twenty (20) feet measured at right angles to the centerline of the driveway, except as increased by permissible radii. 8. The axis of an approach to the road may be at a right angle to the centerline of the county road and of any angle between ninety (90) degrees and sixty (60) degrees but shall not be less than sixty (60) degrees. Adjustment will be made according to the type of traffic to be served and other physical conditions. 9. The construction of parking or servicing areas on the county road right-of-way is specifically prohibited. Commercial establishments for customer vehicles should provide off -the -road parking facilities. 10. The grade of entrance and exit shall slope downward and away from the road surface at the same rate as the normal shoulder slope and for a distance equal to the width of the shoulder but in no case less than twenty (20) feet from the pavement edge. Approach grades are restricted to not more than ten percent (10%). 11. All driveways and approaches shall be so constructed that they shall not interfere with the drainage system of the street or county road. The Applicant will be required to provide, at his own expense, drainage structures at entrances and exits, which will become an integral part of the existing drainage system. The Board of County Commissioners or their representative, prior to installation, must approve the dimensions and types of all drainage structures. Note: This permit shall be made available at the site where and when work is being done. A work sketch or ill drawing of the proposed driveway(s) must accompany application. No permit will be issued without drawing, blueprint, or sketch. DUO? 2006 10 55 W ARRANTy DEED THIS DEED, Mee rime tad G9W suns 1 1191111,11e afar said Cowry of ROMS and Sear of COLORADO DOUGLAS C . MCLEOD , gram, gad LA ti whale legal address is 955 KEspcnTr 1129 BOUSTOA. rix 77207 I atm rid Cam" ur 76ARR18 *oasis of TauAS Igrad a I5yITARSSC11, nal Au gfscaa fir add. is aasiden6ea of en moot Tan dollar• and is thaw good adad j valuable zona i deratiOn fl` +arcnuwkdged. has grimed. a.gnLred. eddy y� DOLL.ARS. dm =mai aW,aaTaeyxy of kWh is licca II asenow. his heirs grid ed., due 6p!Mese smears dee" grass. augain, eel. roomy rad Wail* MAM lie mom forever. 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Oonvilunkreikpraa107,200) 6 11 Amin MAGMA L..Mt7ragammlye.xv, 4 I � 2 :r woutuarcato ea.lagn+ie.n..e;hsunwrr II 06 0' 2008 10 59 Exhibit "I" 'general taxes for the year 2006 and subsequent years; and those specific exceptions described by reference to recorded documents as reflected in the Title Documents accepted by Grantce(s) In accordance with Section ga(Tirle Review) of the Contract to Buy and Self $eat Estate relating to the above described property; distribution utility easements (incttrding cable 110: those specifically described rights of third parties not shown by the public records of which Grantee has actual knowledge and which were accepted by Grantee(s) in accordance with Section 8b (Matters not shown by the Public Rncords) and Section Se (Survey Review] of the Contract to Buy and Sell Real Estate relating to rho above described real property, inclusion of the property within any special tax dtslrict- and, the benefit and burdens of any declaration and party wall agreements, if any. Stew.'t this Bt062562a6 2.'2 • • • Legal Description: Parcel 1 of the Final Plat, Leo Subdivision Section 20, Township 6 South, Range 93 West of the 6th P.M. County of Garfield, State of Colorado, as recorded with the Garfield County Clerk and Recorder dated June 4, 2001 at reception number 582066. ADJACENT SURFACE OWNERS Mary Margaret Sandoval & Mary Margaret Johnson 3278 Meade Street Denver, CO 80237 Shirley J. Donaghhue 9245 County Road 320 Rifle, CO 81650 Martinez Ventures, LLC 718 Railroad Ave. Rifle, CO 81650 David M. & Anna R. Johnson 55 County Road 317 Rifle, CO 81650 Daniel Lawson & Beverly Jo Ann Ooley 9418 County Road 320 Rifle, CO 81650 Max Wayne Hall & Margie Shouse 1305 Lombardi Erie, CO 80516 Nathan & Jay Lynn Leuallen P.O. Box 1235 Rifle, CO 81650 Joseph Gottschalk 9559 County Road 320 Rifle, CO 81650 City of Rifle P.O. Box 1908 Rifle, CO 81650 Kirk & Trina Swallow 2170 County Road 321 Rifle, CO 81650 The John L. & Mickey M. Neil Trust 2103 County Road 321 Rifle. CO 81650 MINERAL OWNERS Gaye Leo — 100% P.Q. Box 1046 Green Valley, AZ 85622 February 2007 Craig Richardson Planning Commissioner Garfield County 108 8th Street, Suite 401 Glenwood Springs, Colorado 81635 Re: Wildlife Report and Impact Assessment for McLeod Lay Down Yard Garfield County, Colorado Dear Mr. Craig Richardson: Enclosed with this letter is a wildlife report and impact assessment prepared for the McLeod Lay Down Yard on Taughenbaugh Mesa, south of Rifle, Colorado. This plan was prepared as a component of Petrogulf s request for a special use permit. The scope and form of the following document is the result of a conversation held with you on the 31s1 of January, 2007. The data presented was acquired from the Colorado Division of Wildlife and was supplemented by a site visit conducted on February 6, 2007. if you have any questions regarding any part of the attached wildlife report and impact assessment please do not hesitate to contact me. Sincerely, Chris Hines Grand Junction Branch Manager Biologist / GIS Technician cc: M. Stanley (O&G) U. Fillipi (O&G) J. Smith (Wagon Wheel Consulting) R. Gorka (Petrogulf) File (249) /enclosure Keeping oil and gas projects flowing 11511.5'1`5treet,Suite 340 • Grand Junction, Colorado 81501 tel 970.243.7894 • fax 970.243.7896 • www.ogenvironmental.rom WILDLIFE REPORT and IMPACT ASSESSMENT For MCLEOD LAY DOWN YARD Garfield County, Colorado February 2007 • Table of Contents INTRODUCTION ""' 1 LOCATION and SITE DESCRIPTION 1 METHODS.. RESULTS 2 Elk / Wapiti 2 Mule Deer 2 Bald Eagle 3 Other Raptors 3 CONCLUSIONS 3 REFERENCES 4 Appendix Project Photos Figures Project Maps s WILDLIFE REPORT and IMPACT ASSESSMENT INTRODUCTION Following is a presentation of the findings from a document review and site visit conducted by O&G Environmental Consulting, LLC (O&G) on behalf of Petrogulf Corporation (Petrogulf). This report was prepared in support of Petrogulf's application to Garfield County for a special use permit. Petrogulf proposes to construct a two acre lay down yard (LDY) for the purpose of storing pipe and other miscellaneous materials used in support of Petrogulf's operations in the area. Construction of the site will involve clearing vegetation, grading the site, and compacting the soil. The site will then be covered with gravel and fenced. The project will be referred to as the McLeod Lay Down Yard. LOCATION and SITE DESCRIPTION The proposed site of the LDY is approximately two miles southwest of the western Colorado • town of Rifle in Garfield County, and lies in sections 19 and 20 of township T6S-R93W. The property is found within irrigated pastureland owned by Douglas C. McLeod on the eastern end of Taughenbaugh Mesa at an approximate elevation of 5,650 feet above see level, or approximately 400 feet above the Colorado River floodplain. The mesa is characterized by flat to slightly rolling pastureland dotted with private residences. Figure 1 below shows the location of the proposed yard. Climate records for Rifle, Colorado just northeast of the project area, show extreme temperatures range from -38° F to 104° F. Mean temperatures in Fahrenheit range from the low to mid 20s in December and January to around 70 in July and August. The annual mean precipitation is 11.61 inches with most of that occurring during the spring and fall months. (WRCC, 2005). • METHODS Prior to conducting field surveys or document reviews, an informal consultation was held with a Garfield County representative to determine the nature and scope of this exercise. During that conversation, big game (elk and mule deer), bald eagles, and raptors were identified as species likely to be impacted by the construction and operation of this facility. In addressing possible impacts, the county requested a wildlife report with a discussion of likely impacts to those species' habitats. (GC, 2007) During the week of February 5, an O&G biologist obtained geographic information systems (GIS) datasets from the Colorado Division of Wildlife (CDOW, 2007). These datasets illustrated the relationship of the proposed location for the LDY to known habitat for elk, mule deer, and Petrogul f — McLeod Lay Down Yard Wildlife Report and impact Assessment bald eagles. These relationships are presented in Figures 2, 3, and 4 respectively. Their implications are discussed in the Results section below. On February 6, an O&G biologist visited the proposed site of the LDY. The site was examined on foot and the larger area was explored from a vehicle. The project area was evaluated for big game and raptor habitat, and any sign of big game activity was noted. These observations were aided by the use of binoculars, and recorded with a digital camera and a global positioning system (GPS) unit. RESULTS The results of the field survey and document review are presented below. Figures 2, 3, and 4 examine known occurrences of elk, mule deer, and bald eagle habitat (respectively) as identified by the CDOW (2007). Elk 1 Wapiti The wapiti, or elk, is the largest of Colorado's native deer and ranges throughout mountainous parts of the state, foraging in meadows and alpine tundra. Wapiti are gregarious animals, sometimes moving in herds of several hundred individuals. In summer, their diet may be 80 to 90 percent grasses, while bark and twigs of trees and shrubs may contribute half the winter diet. Mating is over by mid-October. Usually a single, obscurely spotted calf is born in May or June, • after a gestation period of 8.5 months. (CDOW, 2006a) Using the GIS dataset of elk habitat provided by the CDOW it was determined that construction of the LDY would result in the disturbance of 2 acres of overall range, 2 acres of winter range, and 1.9 acres of winter concentration range. See Figure 2 for an illustration of this spatial relationship to known elk habitat. During the site visit on February 6, a herd of elk was observed in an adjacent pasture approximately 0.25 miles west of the proposed site of the LDY. However, an examination of the site showed no evidence of elk activity within the proposed boundary. • Mule Deer Mule deer are abundant throughout Colorado. They can be distinguished from white -tail deer by their rope -like tails, evenly forked antlers and extravagant ears. Deer are browsers, feeding mostly on woody vegetation, including twigs and leaves of shrubs and trees, including ornamentals. They also forage on crops, especially corn. Because they eat little grass, they tend not to compete with livestock or elk. Deer breed from October to December. After a gestation period of six and a half months, spotted young (usually twins) are born. (CDOW, 2006b) Using the GIS dataset of mule deer habitat provided by the CDOW it was determined that construction of the LDY would result in the disturbance of 2 acres of overall range, 2 acres of winter range, and 2 acres of severe winter range. See Figure 3 for an illustration of this spatial relationship to known mule deer habitat. During the site visit on February 6, no evidence of mule deer activity was noted within the proposed boundary. Petrogulf— McLeod Lay Down Yard Wildlife Report and Impact Assessment Bald Eagle Bald eagles are commonly seen perched and roosting in trees along streams, rivers, lakes, and reservoirs. They are also seen in ponderosa pine forests. Roost sites require appealing perch locations, and roosts are often located in areas protected from the wind by trees and/or terrain. Eagles feed mainly on fish, but water fowl, small mammals, and carrion supplement their diet, especially when fish are in short supply. They are also commonly observed flying over prairie dog colonies where it is presumed they are hunting for prairie dogs, other prey species, or carrion. Three elements are considered important for effective winter habitat: perches, roosts, and food. Known winter range, roost sites, and active nests for bald eagles exist along the Colorado River floodplain at the base of Taughenbaugh Mesa. However the proposed site of this action falls outside of the associated buffers for those habitats, and no bald eagles were observed during the site visit. See Figure 4 for an illustration of this spatial relationship to known bald eagle habitat. Other Raptors All raptors are afforded protection under the Migratory Bird Treaty Act of 1918 (USFWS, 2005). Additional protections may also exist under local BLM, county and state laws. In the vicinity of the proposed disturbance, Taughenbaugh Mesa is largely absent of trees suitable for nesting raptors. Those trees which are present were examined for raptor nests. No nests or raptors were observed during the site visit on February 6. CONCLUSIONS As illustrated in Figures 2 and 3 the proposed site of the LDY lies within mule deer and elk overall and winter range, and within elk winter concentration range and mule deer severe winter range. Construction of the LDY would result in a loss of approximately 2 acres in each of those habitat types for the life of Petrogulf operations in the area. As grazers, impacts to elk forage are likely to be more distinct. The site lies within pasture land and a herd of elk were observed in the area during the site visit on February 6. However, no sign of recent or significant elk activity was noted on the site or directly surrounding the site. Because of the absence of browse vegetation (i.e. shrubs and small trees) no significant impacts to mule deer forage are anticipated. Due to the site's proximity to homes, the closest is approximately 100 yards to the east, it is not anticipated that construction or operation of the LDY will have a significant affect on big game movement in the area. The presence of elk 0.25 miles to the west of the site, and the open nature (i.e. absence of homes) of the mesa there, leads one to believe that elk and mule deer use that portion of the mesa for movement and will continue to do so once the LDY is constructed and in operation. • Petrogulf— McLeod Lay Down Yard Wildlife Report and Impact Assessment The absence of suitable nesting trees that are not already in closer proximity to homes makes an impact to area raptors unlikely. In addition, no nests were observed in any of the trees in the area. As illustrated in Figure 4, the site falls outside of recognized bald eagle habitat zones, and the mesa provides a geographic screen to bald eagle activities in the floodplain below. Also, Interstate 70 and a housing development at the base of the mesa are more likely to provide human caused disturbance to bald eagles in the area. In closing, animals that forage on this portion of the mesa do so in the presence of human activities. This habituation greatly decreases the likelihood that the construction and operation of this facility will have a significant impact on wildlife in the area. REFERENCES Colorado Division of Wildlife (CDOW). 2006a. Elk — Colorado Division of Wildlife. Retrieved from: hit ://wildlife.state.co.us/WildlifeS ecies/ProfilesfMammals/Elk.htm Colorado Division of Wildlife (CDOW). 2006b. Deer Colorado Division of Wildlife. Retrieved from: http://wildlife.state.co.us/WildlifeSpecies/Proiiles/Mammals/Deer.htm Colorado Division of Wildlife (CDOW). 2007. CDOW GIS Data Download. Retrieved from: http://ndis.nrel.colostate.eduitipiindex.html Garfield County (GC). 2007. Personal communication with Craig Richardson (Planning Commissioner) on January 31, 2007. U.S. Fish & Wildlife Service (USFWS). 2005. Migratory Bird Permits. Retrieved from: http://www.1Ws.gov/permitsimbperrnits/ActSummaries.htrnl Western Regional Climate Center (WRCC). 2005. RIFLE, COLORADO (057031). Retrieved from http:/fwww.wrcc.dri.edu/cgi-bin/cliMA1N.pl?cordo. Desert Research Institute. Reno, Nevada. 4 APPENDIX Survey Photos • e • Looking E along N end of proposed LDY From: NE1/4, NE'/, Sec 19, T6S, R93W UTM Zone 13 0258544E 4377301N (NAD83) Looking SE across LDY from: NEVI, NEVI, Sec 19, T6S, R93W UTM Zone 13 0258544E 4377301N (NAD83) • • Looking S along W end of proposed LDY from: NE'/a, NE'/4, Sec 19, T6S, R93W UTM Zone 13 0258544E 4377301N (NAD83) FIGURES Project Maps • • Mih. -11 Fire Prevention Suppression • • 1. Introduction 2. Purpose 3. Responsibilities and Coordination 4. Fire Prevention 4.1 Pre -construction & Construction 4.1.1 Training 4.1.2 Smoking 4.1.3 Spark Arrestors 4.1.4 Parking, Vehicle operation & Storage Areas 4.1.5 Equipment 4.1.6 Road Closures 4.1.7 Refueling 4.1.8 Burning 4.1.9 Fire Guard 4.1.9.1 Fire Guard Communications 4.1.10 Welding 4.1.11 Restricted Operation 4.1.12 Monitoring 5. Fire Suppression 5.1 Suppression 5.2 Monitoring 6. Notification 6.1 Notification Procedures 1. INTRODUCTION 110 The Fire Prevention and Suppression Plan (plan) identifies measures to be taken by XTO Energy (Company) and its contractors (Contractor) to ensure that fire prevention and suppression techniques are carried out in accordance with federal, state, and local regulations. Measures identified in this plan apply to work within the project area defined as the facility site, right-of- way (ROW), access roads, all work and storage areas, and other areas used during construction of the project. 2. PURPOSE The risk of fire danger during pipeline construction is related to smoking, refueling activities, operating vehicles and other equipment off roadways, welding activities and the use of flammable liquids. During pipeline operation, risk of fire is primarily from unauthorized entry onto the site. During maintenance operations, risk of fire is from vehicles and pipeline maintenance activities that require welding. This plan establishes standards and practices that will minimize the risk of fire danger and, in case of fire, provide for immediate suppression. 3. RESPONSIBILITIES AND COORDINATION This plan will be implemented by the Company and the Contractor on the project. The Company and the Contractor have the responsibility for providing all necessary fire -fighting equipment on the project site to their respective employees, and operating under the requirements of this plan. Prior to construction, the Company will contact the appropriate authorities to establish communications, obtain permits (if applicable), and/or fulfill other obligations as directed by fire control authorities. In addition to the above, the Company will: • Ensure that prevention, detection, pre -suppression, and suppression activities are in accordance with this fire plan and federal, state and county laws, ordinances, and regulations pertaining to fire. • Accompany agency representatives on fire tool and equipment inspections and take corrective action upon notification of any fire protection requirements that are not in compliance; and The fire prevention and suppression measures described in this plan will be in effect from June 1 to the end of construction. These dates may change by advance written notice by fire control authorities. However, required tools and equipment will be kept in serviceable condition and be immediately available for fire suppression at all times. 4. FIRE PREVENTION MEASURES 4.1 PRECONSTRUCTION AND CONSTRUCTION Methods and procedures that will be implemented prior to and during the construction period to minimize the risk of fire are described below. • • 4.1.1 Training Contractor will train all personnel about the measures to take in the event of a fire. Contractor will also inform each construction crewmember of fire dangers, locations of extinguishers and equipment, and individual responsibilities for fire prevention and suppression during regular safety briefings. Smoking and fire rules will also be discussed with the Contractor and all field personnel during the project's environmental training program. 4.1.2 Smoking Smoking is prohibited in areas cleared and graded a minimum of 10 feet in diameter to mineral soil. All burning tobacco and matches will be extinguished before discarding. Smoking is also prohibited while operating equipment or vehicles, except in enclosed cabs or vehicles. 4.1.3 Spark Arresters During construction, operation, maintenance, and termination of the site, all Contractor and Company equipment operating with an internal combustion engine will be equipped with federally approved spark arresters. Spark arresters are not required on trucks, buses and passenger vehicles (excluding motorcycles) that are equipped with an unaltered muffler or on diesel engines equipped with a turbocharger. A La Plata County fire prevention officer will have full authority to inspect spark arresters on project equipment prior to its use on the project on federal lands and periodically during the construction project. 4.1.4 Parking, Vehicle Operation and Storage Areas In no case will motorized equipment, including worker transportation vehicles be driven or parked outside of the designated and approved work limits. Equipment parking areas, the site, staging areas, designated vehicle -parking areas, and small stationary engine sites, where permitted, will be cleared of all flammable material. Clearing will extend a minimum of 10 feet beyond the edge of the area to be occupied, but not beyond the boundaries of the approved site, extra workspace, or ancillary site. Glass containers will not be used to store gasoline or other flammables. 4.1.5 Equipment All motor vehicles and equipment will carry one long -handled (48 -inch minimum) round -point shovel, and one dry chemical fire extinguisher (5 pounds minimum). Individuals using power saws and grinders will have a shovel as described above, and an 8 -ounce capacity fire extinguisher immediately available. The Fire Guard will operate a truck equipped with a 125 gallon slip-on pump unit designed for wildlife firefighting. All equipment will be kept in a serviceable condition and readily available. 4.1.6 Road Closures Contractor will notify the appropriate fire suppression agency of the scheduled closures prior to the open -cut crossing of a road. If required, Contractor will construct a bypass prior to the open -cut installation of a road crossing, unless a convenient detour can be established on existing project approved roads or within project approved work limits. All by passes will be clearly marked by the Contractor. During road closures the Contractor will designated one person, who knows the bypass, to direct traffic. Contractor will minimize, to the extent possible, the duration of road closures. 4.1.7 Refueling Fuel trucks will have a large fire extinguisher charged with the appropriate chemical to control electrical and gas fires. The extinguisher will be a minimum size 35 -pound capacity with B.C. or higher rating. 4.1.8 Burning No burning of slash, brush, stumps, trash, or other project debris will be permitted on the project. 4.1.9 Fire Guard Contractor will designate a Fire Guard for the construction spread prior to construction activities. The Fire Guard must be physically able, vigilant, and suitably trained to detect fires and use required fire -fighting equipment. The Fire Guard may not perform other functions during pipeline construction in addition to his/her Fire Guard responsibilities. The Fire Guard will be identified by a hard- hat decal and/or other appropriate designation. An alternate or back-up Fire Guard will be designated to assume responsibility, if the primary guard is unable to perform their duties. Contractor will provide, if required by the Company, additional fire watch -people with radio communication to the Fire Guard should construction activities be too widely spread for one Fire Guard to manage effectively. 4.1.9.1 Fire Guard Communications: The Fire Guard will be responsible for maintaining contact with fire control agencies, and will be equipped with a radio or cellular telephone so immediate contact with local fire control agencies can be made. If cellular phone coverage is not available, the Fire Guard will use the Contractor's frequency to contact their radio base at the Contractor's yard. From there, yard personnel will telephone emergency dispatch. 4.10 Welding One 5 -gallon backpack pump will be required with each welding unit in addition to the standard fire equipment required in all vehicles. All equipment will be kept in a serviceable condition and readily available. 4.11 Restricted Operations The Contractor will restrict or cease operation on lands during periods of high fire danger at the direction of the responsible La Plata County Fire Management Officer. The Contractor will restrict or cease operations during periods of high fire danger at the direction of the La Plata County Sheriff's Office Fire Marshal. Restrictions may vary from stopping certain operations at a given time to stopping all operations. The company may obtain approval to continue some or all operations if acceptable precautions are implemented. 4.12 Monitoring Construction and Environmental Inspectors for the Company will inspect the job site and the Contractor's operations for compliance with all provisions of this plan. In addition, federal, state, and local fire control agencies may perform inspections in areas under their jurisdiction at their discretion. 4.2 PIPELINE OPERATION During pipeline operation, the risk of fire danger is minimal. The primary causes of fire on the ROW result from unauthorized entry by individuals utilizing the ROW for recreational purposes and from fires started outside of the ROW. In the latter case, the ROW can be used by authorities as a potential fire break. During pipeline operation, access to the ROW will be restricted, in accordance with landowner requirements, to minimize recreational use of the ROW. 4.3 PIPELINE MAINTENANCE During maintenance operations, the Company or its Contractor will equip personnel with basic fire -fighting equipment including fire extinguishers, and shovels as described in Section 4.1.5 Equipment. Maintenance crews will also carry emergency response/fire control contact phone numbers. 5. FIRE SUPPRESSION 5.2 SUPPRESSION Contractor will take the following actions should a fire occur within the project area during construction. • Take immediate action to suppress fires using all available manpower and equipment. Notify the Fire Guard. • Immediately notify the nearest fire suppression agency of the fire location, action taken, and status (refer to Fire Suppression Contacts for a list of fire suppression agencies and emergency phone numbers). • Relinquish the Fire Guard's direction of fire suppression activities to agency fire management officers upon their arrival. If a reported fire is controlled, the Fire Guard will note the location and monitor the progress in extinguishing the fire. The Fire Guard, or their designee, will remain at the fire scene until it is fully extinguished. The extinguished fire will be monitored in accordance with procedures described in Section 5.1 below. 5.1 MONITORING Contractor will mark the location and boundaries of all extinguished fires, The extinguished fire site will be monitored by the Contractor for a minimum of 24 hours. Monitoring includes walking the fire site perimeter, as well as crossing through the site. The Fire Guard will maintain a log of all extinguished fire locations for future reference. NOTIFICATION 6.1 NOTIFICATION PROCEDURES Construction crewmembers will report all fires, whether extinguished or uncontrolled, to the Fire Guard. If the fire is uncontrolled, Contractor's Fire Guard will call the nearest fire suppression agency (refer to Fire Suppression Contacts), and the Company. Information regarding the location of the fire, property ownership, and closest access roads should be provided to the Dispatch Office and the Company. If a reported fire is controlled, but not extinguished, the Fire Guard will call to notify the nearest fire suppression agency to alert them of the situation. The status of the fire will be monitored by the Fire Guard and when extinguished, the nearest fire suppression agency will be notified. See table for a list of fire suppression contacts. Fire Control Measures General • All facilities or operations personnel are instructed as to: Be aware of local area fire danger for each day Location of fire control equipment Proper operation of fire control equipment Emergency procedures and how to call for additional resources • Petrogulf will comply with current federal, state and county fire bands. Welding & Hot Work Operations • A minimum of one person is detailed to act as a fire watch during welding or hot work operations with a fire extinguisher at hand. • Welding shields are used during grinding operations to prevent sparks from leaving work area and igniting vegetation. • Water trucks are used to wet down ground and near by vegetation, as conditions dictate. • At the close of each day, personnel inspect the area of welding or hot work activities for any smoldering debris and any conditions conductive to fires. Communications • Petrogulf or contractors vehicles are typically equipped with cellular communications on board. In the event of a fire • In the event of a fire, all personnel and appropriate equipment on site will be committed to fire containment and control. • The appropriate fire authorities will be notified immediately. • Direction of fire control efforts will be transferred to appropriate fire fighting agency personnel upon their arrival on site. PETROGULF CORPORATION SPCC PLAN (SITE SPECIFIC) MCLEOD PROPERTY LAY DOWN YARD Petrogulf Corporation does not currently have any plans to store hazardous materials within the proposed lay down yard site; however during the construction phase of the site, the contractor will be required to follow the SPCC procedures as set forth in accordance with Title 49, CFR, Part 171-180; Section 3.3, 3.4, and 3.5 of the attached plan. • Hazardous M aterial Management Spill Prevention 1. Introduction 1.1 Purpose of Plan 1.2 Overview of the Plan's Components 1.3 Plans and Maps Related to the HazMat Plan 1.4 Regulatory Overview 2, Contractor's Guidelines for Developing the HazMat Plan 2.1 Certifications, Acknowledgements, and Designation of Coordinator Responsible Person 2.1.1 Certifications 2.1.2 Amendments 2.1.3 Responsible Person(s) 2.2 Facilities' Description & Inventory of Materials 2.2.1 Site Map 2.2.2 Inventory 3. Hazardous Materials Management 3.1 Overview of Hazardous Materials Proposed for Use 3.2 Training 3.3 Vehicle Refueling and Servicing 3.4 Equipment Inspection and Decontamination 3.5 Transportation of Hazardous Materials 3.6 Storage of Hazardous Materials 3.6.1 Physical Storage Requirements 3.6.2 Container Labeling Requirements for Hazardous Wastes 3.7 Disposal of Hazardous Materials 3.8 Contaminated Containers 3.9 Waste Oil Filters 3.10 Used Lubricating Oil 3.11 Inspection and Record Keeping 4. Potentially Contaminated Sites 5. Spill Control and Countermeasures 5.1 Physical and Procedural Response Measures 5.1.1 On Site Equipment 5.2 Employee Spill Prevention/Response Training and Education 6. Notification and Documentation of Spill 6.1 Required Notification 6.1.1 Agency Notification 6.1.2 Land Owner Notification 6.1.3 Reporting Criteria 6.2 Documentation • 1. INTRODUCTION This Hazardous Materials Management and Spill Prevention and Countermeasure Plan (HAZMAT Plan) describes measures to be taken by the Petrogulf (Company) and its contractors (Contractor) to reduce the risks associated with the use, storage, transportation, production, and disposal of hazardous materials (including hazardous substances and wastes) and petroleum products. In addition, this plan outlines the required spill prevention and response (cleanup) procedures for the project. The HAZMAT Plan prepared as part of the Stormwater Pollution Prevention Plan as required by the project's National Pollution Discharge Elimination System (NPDES) permit for stormwater discharges. This plan was prepared in accordance with good engineering practices. In general, hazardous materials and clean-up equipment will be stored at the construction yard. Materials Safety Data Sheets (MSDS) will be maintained at the Contractor's yard(s) throughout the construction period. The Contractor will prepare and have the Company review and approve a HAZMAT Plan prior to any storage of hazardous substances or petroleum products. The company will have 10 days to review submitted plans. 1.1 PURPOSE OF PLAN The purpose of this plan is to provide a description of hazardous materials management, spill prevention, and spill response/cleanup measures associated with the construction, operation, and maintenance of the project. In addition this plan provides Contractors with requirements and guidance for the creation of their own HAZMAT Plan. 1.2 OVERVIEW OF THE PLAN'S COMPONENTS This plan includes the following components: (1) an introduction; (2) a description of the spill prevention procedures related to vehicle refueling and servicing and the transportation, storage, and disposal of hazardous materials; (3) guideline for developing the Contractor's HAZMAT Plan; (4) a description of the physical and procedural methods for spill control and cleanup; and (5) an overview of the notification and doc> unentation procedures to be followed in the event of a spill. 1.3 PLANS AND MAPS RELATED TO THE HAZMAT PLAN Construction Alignment Sheets: These maps show the locations of drainages, waterbodies (defined as flowing streams and rivers), wetlands, and other sensitive resource areas. Fire Suppression and Prevention Plan: This plan details measures to be taken to reduce the risk of starting a fire, and measures to be implemented in the event a fire does occur within the project construction area. Stream Crossing and Wetland Protection Plan: This plan provides detailed information on measures that will be implemented during construction to avoid and/or minimize proj ect-related impacts to waterbodies and wetlands. 1.4 REGULATORY OVERVIEW Major legislation pertaining to hazardous materials includes the Comprehensive Environmental Response, Compliance, and Liability Act (CERCLA), the Resource Conservation and Recovery Act (RCRA), the Clean Air Act, and the Clean Water Act. Numerous other federal, state, and local regulations also govern the use, storage, transport, production, and disposal of hazardous materials. Some of the key requirements of these laws are outlined in the following: • Title 29, CFR, Part 1910.1200 (Hazardous Communication Standard). Title 27, CFR, Part 55 (storage and use of explosives) • Title 40, CFR, Parts 112, 260 to 263, and 279 (hazardous wastes definitions, standards for hazardous waste generators, and requirements for Spill Prevention Control and Countermeasure Plans) • Title 49, CFR, Part 171-180 (hazardous materials transportation) • Bureau of Land Management (BLM) Instruction Memorandum 94-253. Title 40, CFR, Part 1910.101 to .111 and .120 (OSHA regulations) 4 Superfund Amendments and Reauthorization Act (SARA) Title III, Section 301-303 (emergency planning), Section 304 (emergency release notification), and Section 311/312 (community right -to -know reporting requirements) This plan is intended to comply with and compliment existing regulations pertaining to the safe use of hazardous materials. Persons responsible for handling hazardous materials for this project will be trained in the proper use/management of the materials and will be familiar with all applicable laws, policies, procedures, and best management practices (SMP' s) related to them. 2. CONTRACTOR'S GUIDELINES FOR DEVELOPING THE HAZMAT PLAN The following sections provide specific guidelines for the preparation of the HAZMAT Plan by Contractor. 2.1 CERTIFICATIONS, ACKNOWLEDGEMENTS AND DESIGNATION OF COORDINATOR RESPONSIBLE PERSON(S) 2.1.1 Certifications Contractor will certify that all of the information provided in the HAZMAT Plan is accurate and complete to the best of their knowledge. Contractor will also certify that they are committed to implementing the HAZMAT Plan as written. As per the requirements of 40 CFR, Part 112, Contractor will have the HAZMAT PLAN reviewed and certified by a registered Professional Engineer. 2.1.2 Amendments In completing this certification, Contractor will agree to make all necessary and appropriate amendments to the plan and submit any such amendment to the Company and the appropriate county, state, andlor federal authorities within 7 days of finding an amendment is necessary. Amendments to the plan will be necessary under any of the following circumstances: • 100 percent or more increase of a previously disclosed material, • any handling of a previously undisclosed hazardous material subject to inventory requirements, • a change of business address, name, or ownership. 2.1.3 Responsible Person(s) Contractor is responsible for contacting county representatives to determine county requirements for Hazardous Materials Business/Management Plans. Generally counties will provide guidelines and forms for completion and submittal to the county. As required on the applicable county forms that the Contractor will obtain, Contractor will designate a primary emergency coordinator for hazardous materials management and emergency response. Two alternates will also be identified. Business, residential, and cellular or pager telephone numbers will be provided for all three persons as necessary, to allow for contact on a 24-hour basis. Primary and alternate emergency coordinators will be knowledgeable of the chemicals and processes involved in Contractor's operation. They will have full access to all facilities, including locked areas, and must have the authority to commit company resources. They will also have stop work authority to prevent impacts (potential or actual) to environmental resources. 2.2 FACILITIES' DESCRIPTION AND INVENTORY OF MATERIALS Contractor' s submittals will be provided to the Environmental Inspector. The Environmental Inspector will provide submitted information to the jurisdictional agencies as appropriate. 2.2.1 Site Map Contractor will complete the relevant county forms related to business information and description. The Contractor is also required to provide a site map/facility map for each construction yard indicating storage and safety precautions for hazardous materials and hazardous wastes. The Contractor's site map will, at a minimum, indicate the following: # orientation and scale ♦ total land area in square feet • access and egress points • building andlor temporary trailers • parking lots • adjacent land uses (if business, indicate business name) +1 surrounding road, storm drains, ad waterways (including waterbodies and wetlands) + locations of hazardous materials and hazardous waste storage ♦ underground and above ground tanks + containment or diversion structures (dikes, berms, retention ponds) • shutoff valves and/or circuit breakers • location of emergency response materials and equipment ♦ location of MSDS and HAZMAT PLAN • location of emergency assembly area • location of clean up equipment within the yard As noted in Section 3.6 -- Storage of Hazardous Materials, hazardous materials will be stored only in designated staging areas 100 feet from streams (dry and wet) and wetlands (dry and wet) and equipment storage yards. Temporary pumps, diesel powered generators, etc., will be located at least 100 feet from the edge of streams (dry and wet), wetlands (including dry or seasonal wetlands), and other sensitive areas defined by the project's Environmental Inspectors. If storage areas cannot be located at least 100 feet from streams and wetlands because of topographic conditions or space, the Contractor will also provide a sketch of where the materials will be stored in relation to the waterbody and location of clean up equipment. Include measures to be implemented for secondary containment as specified in Section 3.6.1, Physical Storage Requirements. 2.2.2 Inventory Contractor will provide a complete inventory to the Company of all hazardous substances that will be used (refer to Title 40, CFR, Parts 116 and 302). All inventory forms required by the relevant county will be provided by the Contractor as part of their HAZMAT Plan. 3. HAZARDOUS MATERIALS MANAGEMENT Construction, operation, and maintenance of the project will require the use of certain potentially hazardous materials such as fuels, and herbicides. By definition, hazardous materials (substances and wastes) have the potential to pose a significant threat to human health and the environment based upon their quantity, concentration, or chemical composition. Generally, hazardous materials will be stored in the Contractor's yard and not on the right-of-way (RO). When stored, used, transported, and disposed of properly as described below, the risks associated with these materials can be reduced substantially. 3.1 OVERVIEW OF HAZARDOUS MATERIALS PROPOSED FOR USE The following project -specific measures pertain to all vehicle refueling and servicing activities as well as the storage, transportation, production and disposal of hazardous materials (substances/wastes). These measures are intended to prevent the discharge of fuels, oils, gasoline, and other harmful substances to waterbodies, groundwater aquifers, and/or other sensitive resource areas during project construction. Hazardous materials (substances) used during project construction may include solvents and other substances. In addition, petroleum products such as gasoline, diesel fuel, lubricating oils, and hydraulic fluid will be used. Some of these materials will be used in relatively large quantities at staging areas, in storage yards, and on the ROW to operate and maintain equipment during construction. Smaller quantities of other materials such as: herbicides, paints, and other chemicals will be used to control noxious weeds and facilitate revegetation on the row, and to operate and maintain meter stations during the life of the project. Additional materials will be necessary at other locations along the ROW (e.g., river crossing, hydrostatic test stations) and at off -ROW construction yards, Listings of other hazardous materials that will be used during construction, operation, and maintenance of the project in other locations will be identified on the Contractor's Hazardous Substances Inventory form included in Attachment 1. The Company will compile all Contractor's submittals and update Attachment 1 prior to start of construction. The Company will update the inventory of hazardous materials used/stored on the project as needed throughout the life of the project. This information will be provided to the appropriate regulatory agencies as required (i.e., the BLM requires reporting of all hazardous materials as defined by CERCLA, RCRA, and the Environmental Protection Agency (EPA). A copy of the compiled Attachment 1 will be provided to the BLM).. 3.2 TRAINING All project personnel will be required to receive basic spill prevention training. The Company is required to maintain a record of those workers who have received environmental training and ensure that only trained employees are allowed to work on the project. In addition all Contractor personnel who will be involved with the transportation and storage of fuels or hazardous substances, equipment maintenance, and spill response will be required to attend a higher level training class given by the Contractor as described in Section 5.2. 3.3 VEHICLE REFUELING AND SERVICING Construction vehicles (e.g., trucks, bulldozers, etc.) and equipment (e.g., pumps, generators, etc.) will be fueled/serviced in designated upland staging areas at least 100 feet from waterbodies and wetlands (including dry streams and dry or seasonal wetlands, refer to the stream and wetland crossing list in the Stream Crossing and Wetland Protection Plan). If pumps, generators, etccannot be located at least 100 feet from streams and wetlands because of topographic conditions or space limitations, special precautions (e.g., placing pumps and small refueling cans in secondary containment structures) will be taken to prevent the spill or release of hazardous materials into the waterway. Fueling will not occur within 200 feet of private wells or 400 feet of municipal wells. When selecting refueling areas, consideration will be given to slopes and other topographic conditions. Refueling locations will generally be flat to minimize the chance of spilled substance reaching a waterbody. In most cases, rubber-tired vehicles will be refueled and serviced at local gas stations or equipment yards off the ROW. Tracked vehicles will typically be refueled and serviced by fuel/service vehicles on the ROW. Every effort will be made to minimize the threat of a fuel spill during refueling and servicing. Fuel/service vehicles will carry extra plastic, a bucket or plastic pan to catch fuel, and minimum of 20 pounds of suitable absorbent material to handle potential spills. In addition, all vehicles will be inspected for leaks prior to being brought on-site and regularly throughout the construction period. In the event that a leak(s) is found, equipment will not be allowed to operate until all leaks have been repaired. Vehicles will also be equipped with fire fighting equipment as specified in the Fire Prevention and Suppression Plan. Construction equipment requiring maintenance which might result in the draining or leaking of fluids will be serviced only after a 12 mil plastic liner has been installed between the equipment and the soil. This liner must be placed in such a manner that all fluid is contained. Washing of construction vehicles (such as concrete trucks) will be allowed only in construction staging areas at least 100 feet from waterbodies and wetlands (including dry streams and dry or seasonal wetlands). Washing areas will be contained with berms or barriers to prevent migration of wastewater andlor sediments into waterbodies. Waste concrete material will be removed and properly disposed of once it has hardened. 3.4 EQUIPMENT ISPECTION AND DECONTAMINATION Prior to moving equipment onto the site, the Environmental Inspector will check equipment for leaks while also inspecting the equipment for weeds. All equipment will be cleaned and weed-free prior to being moved to the site. Equipment contaminated from fuel or hydraulic line breaks will be cleaned with diapers and the diapers will be disposed of properly. 3.5 TRANSPORTATION OF HAZARDOUS MATERIALS Procedures for loading and transporting fuels and other hazardous materials will meet the minimum requirements established by the Department of Transportation (DOT) and other pertinent requirements. At all times, hazardous materials will be transported in DOT approved containers. Prior to transporting hazardous materials, appropriate shipping papers will be completed. Vehicles carrying hazardous materials will be equipped with shovels, barriers tape, 4 to 6 mil plastic bags, personal protective clothing, and spill pads to contain a small spill should one occur during transport. In addition, vehicles transporting such materials will be properly signed (placarded) andlor marked. Prior to transporting hazardous materials, vehicles will be inspected for leakage and other potential safety problems. The Contractor will ensure that vehicle drivers are properly trained to respond to and report spills, leakage, andlor accidents involving hazardous materials (see Section 5.2 of this plan). All hazardous materials used for the project will be properly containerized and labeled at all times, including during transportation. Smaller DOT approved containers will be used on-site to transport needed amounts of hazardous materials to a specific location. Transfer of materials from large to small containers will not be done by hand pouring, but will be accomplished using appropriate equipment including pumps, hoses, and safety equipment. These smaller ("service") containers will also be clearly labeled. 3.6 STORAGE OF HAZARDOUS MATERIALS Hazardous materials will be stored only in designated staging areas 100 feet from streams (dry and wet) and wetlands (dry and wet) and equipment storage yards. Temporary pumps, diesel powered generators, etc., will be located at least 100 feet from the edge of streams (dry and wet), wetlands (including dry or seasonal wetlands), and other sensitive areas defined by the project's Envirorunental Inspectors. If storage areas cannot be located at least 100 feet from streams and wetlands because of topographic conditions or space limitations, special precautions will be taken to prevent the spill or release of hazardous materials into the waterway. These precautions will include limiting the quantity and amount of time such materials are stored near the stream or wetland, providing secondary containment, and using trained personnel to monitor activities at the storage site. Storage of greater than 55 gallons of hazardous materials will not be permitted within 100 feet of streams or wetlands. Cleanup materials, including absorbent spill pads and plastic bags, will also be stored in these areas. Hazardous materials will not be stored in areas subject to flooding or inundation. 3.6.1 Physical Storage Requirements Security: Hazardous materials will be stored in secure areas to prevent damage, vandalism, or theft. During construction hours, hazardous materials may be stored temporarily on the site but overnight storage on the site will be prohibited. All storage containers will remain sealed when not in use and storage areas will be secured (gated, locked, and/or guarded) at night and/or during non -construction periods. Storage Containers: Containers will be compatible with the hazardous materials or wastes stored. If the container leaks or becomes damaged, the substance must be transferred to a container in good condition. Contractor will inspect containers at least weekly to discover any leaks in the containers or the containment systems. Containers used for transportation must comply with the DOT requirements, including those in Title 49, CFR, Part 173. Secondary Containment: Secondary containment will consist of bermed or diked areas that are lined and capable of holding 110 percent of the volume of the stored material plus any potential precipitation accumulation, and will be provided for fuel and oil tanks stored on-site [e.g., in Contractor's yard(s)]. Container Management: Containers holding hazardous substances will be kept closed during transfer and storage, except when it is necessary to add or remove the substance. Incompatible Wastes: Wastes that are incompatible with other wastes will not be placed in the same container, nor in an unwashed container, that previously held an incompatible material. Ignitable or Reactive Substances: Substances that may ignite or are reactive must be located at least 50 feet from the construction yard boundary. "NO SMOKING" signs will be conspicuously placed wherever there is a hazard from ignitable or reactive waste, Examples of ignitable wastes are: paint wastes, certain degreasers, thinners and solvents (petroleum distillates), epoxy resins, and adhesives. Examples of reactive wastes that may be found at construction yards include permanganate and manganese wastes from dry cell batteries. Storm Water: It may be necessary to drain accumulated storm water from within the secondary containment areas that contain the fuel storage tanks. If the storm water has been contaminated, absorbent pads or booms will be used to remove floating petroleum products. After the contamination has been removed, the storm water will be left to evaporate, if possible, otherwise it will be disposed of in an appropriate manner. Prior to disposal, the Environmental Inspector will check for sheen or other evidence of contamination. 3.6.2 Container Labeling Requirements for Hazardous Wastes Contractor will comply with the following labeling requirements for any on-site container (including tanks) used to store accumulated hazardous wastes. The containers will be labeled as required in Title 40 CFR, Part 262 and will contain at least the following information: • chemical name (oil, diesel, etc.), • the accumulation start date and/or the date the 90 -day storage period began; and t the words "Hazardous Waste" and warning words indicating the particular hazards of the waste, such as "flammable", "corrosive", or "reactive." 3.7 DISPOSAL OF HAZARDOUS WASTES Contractor will be responsible for ensuring that all hazardous wastes generated during their operations are collected regularly and disposed of in accordance with all applicable laws. Contractor will determine details on the proper handling and disposal of hazardous waste, and will assign responsibility to specific individuals prior to construction of the project. Hazardous wastes typically include chemicals, spent batteries, and other items. Contractor will ensure that every effort will be made to minimize the production of hazardous waste during the project including, but not limited to, minimizing the amount of hazardous materials needed for the project; using alternative non -hazardous substances when available; recycling usable materials such as paints and batteries to the maximum extent; and filtering and reusing solvents and thinners whenever possible. Any Contractor (generator) producing more than 100 kilograms per month of hazardous waste must apply for an EPA Identification Number. Contractor (generator) producing less than 100 kilograms per month are considered conditionally exempt small quantity generators. A generator can store hazardous wastes on-site for a period of up to 90 days without having to obtain a permit as a storage facility, or as a small quantity generator up to a total of 1000 kilograms. 3.8 CONTAMINATED CONTAINERS Containers that once held hazardous materials as products or which held hazardous wastes must be considered as potential hazardous wastes due to the residues of hazardous contents that may persist. In order for the container to be handled as non -hazardous waste, regulations require that the container be essentially empty and that certain handling requirements for the empty container be followed, including the following: • The containers must be empty, which means as much of the contents as possible have been removed so that none will pour out in any orientation and that they contain less than 1 pound and require special handling because of the waste type. • If the empty containers are less than five gallons, they may be disposed of as non- hazardous solid waste or scrapped. • If the empty containers are greater than five gallons, they must be handled in the following manner: o Returned to the vendor for re -use, a Sent to a drum recycler for reconditioning, or — used or recycled on-site. 3.9 WASTE OIL FILTERS Used, metal canister oil filters can be managed as solid waste as long as they are thoroughly drained of "free flowing" oil (oil exiting drop -by -drop) is not considered "free flowing"); the filters are accumulated, stored, and transferred in a closed, rainproof container. Waste oil filters are best drained by puncturing and gravity draining while the filter is still hot. 3.10 USED LUBRICATING OIL Waste lubrication oil, including contaminated soil and rags, have specific requirements for storage, transportation, and disposal. Contractors are considered "Used Oil Generators" and as such must meet the following requirements: • Have a 1IAZMAT Plan certified by a registered Professional Engineer and approved by the Company. ♦ Conduct spill prevention briefings frequently enough to assure adequate understanding by all workers. • Label all storage containers "Used Oil". ♦ Ensure storage containers do not have visible leaks 3.11 INSPECTION AND RECORD KEEPING Contractor will inspect all storage facilities on a regular basis, but not less than weekly. The Weekly Hazardous Materials/Wastes Inspection Log in Attachment 2, will be used to record the condition of the facility. In addition to the weekly log, Contractor will maintain records for hazardous materials and hazardous wastes as required by all applicable federal, state, and local regulations and permit conditions. Record keeping requirements include: • hazardous material/waste inspection log • transportation documents • bills of lading • manifests • shipping papers ♦ training records i release report forms ♦ spill history Environmental Inspectors will monitor, inspect, document, and report on Contractor's compliance with all hazardous materials and hazardous waste management practices. • 4. POTENTIALLY CONTAMINATED SITES This general procedure is included as a contingency in the event that unexpected or unknown (pre-existing) contaminated sites are encountered during the course of construction. During the course of construction, some potential exists for encountering contaminated soils, groundwater, or other materials. Should such a situation develop where there is a reasonable basis for believing that contaminated materials have been encountered (where contamination is suggested by visible indications or unusual odors), the Contractor will stop work and immediately notify the Environmental Inspector or the Construction Supervisor. The Environmental Inspector or Construction Supervisor will determine next steps, including notification requirements. The Contractor may not commence work without authorization. 5. SPILL CONTROL AND COUNTERMEASURES The measures described in Section 3.0 of this plan are intended to prevent the spill of hazardous materials during normal project construction, operation and maintenance activities. However, not all potential spill situations can be reasonably foreseen or prevented. In accordance with Section 6.1 — Reporting Criteria, the Environmental Inspector will make a note of minor spills and cleanup in their daily logs. These minor spills will be documented in the daily report taken in the event of a major spill. In general, the Contractor will perform all cleanup activities including: (1) specifying in their HAZMAT PLAN specific containment and cleanup procedures; (2) providing necessary materials and labor; and (3) performing all reporting and documentation, as required. Notification and documentation of spills is discussed in greater detail in Section 6.0 of this plan. • 5.1 PHYSICAL AND PROCEDURAL RESPONSE MEASURES Physical response actions are intended to ensure that all spills are promptly and thoroughly cleaned up. However, the first priority in responding to any spill is personnel and public safety. Construction personnel will be notified of evacuation procedures, including evacuation routes, to be used in event of a spill emergency. In general, the first person on the scene will: ♦ attempt to identify the source, composition, and hazard of the spill or stain; ♦ isolate and stop the spill and begin clean up of the spill or stain, if possible (i.e., if it is safe). • contain spills or stains, of unknown substances, in a barrel or plastic to prevent migration if rain occurs, ■ properly store, and ■ obtain a sample of the unknown substance for laboratory analysis • Notify appropriate personnel and initiate reporting actions; and • Initiate evacuation of the area if necessary. Persons should only attempt to clean up or control a spill if they have received proper training. Untrained individuals will immediately notify the Contractor's primary or alternate emergency coordinators. If there is a spill of an unknown substance and its identity cannot be determined by observing obvious clues (i.e., labels on containers), or observing obvious sources (e.g., hydraulic lines, fuel tanks, etc.), it would not be considered safe for the average person to contain the spill and obtain sample for laboratory analysis. Any spill of an unknown substance should be treated as a hazard and should be approached, contained and sampled by trained emergency response personnel. General construction personnel should be instructed to contain and cleanup spills of only those substances they can safely identify and that can be safely approached (from upwind an upgradient) and handled, after identifying the materials from a safe distance and location. In general, expert advice will be sought to properly clean up major spills (defined as any spill over the reportable quantity for that substance). For spills on land, berms will be constructed to contain the spilled material and prevent migration of hazardous materials or petroleum products toward waterways. Dry materials will not be cleaned up with water or buried. Contaminated soils will be collected using appropriate machinery, stored in suitable containers, and properly disposed of in appropriately designated areas off-site. After contaminated soil is recovered, all machinery utilized will be decontaminated, and recovered soil will be treated as used oil if contaminated with petroleum products or hazardous waste is contaminated with hazardous waste. Contaminated cleanup materials (absorbent pads, etc.) and vegetation will be disposed of in a similar manner. For major spills, cleanup will be verified by sampling and laboratory analysis. If spilled materials reach water, booms and skimmers will be used to contain and remove contaminants. Other actions will be taken as necessary to clean up contaminated waters. In areas where construction activity will cross a small slowing waterbody (25 feet or less), absorbent booms will be placed on the water surface downstream of the construction zone, prior to construction. Clean-up materials including absorbent spill pads and plastic bags will be placed on site at flowing streams and "wet" wetlands when construction is occurring within 100 feet of these areas. For river crossings over 25 feet, cleanup materials will be located on both banks. 5.1.1 On -Site Equipment The following equipment will be maintained on site with each crew using heavy equipment for use in cleanup situations. • shovels • absorbent pads/materials • personal protective gear t fire fighting equipment • medical first-aid supplies • phone list with emergency contact numbers • storage containers ♦ communications equipment 5.2 EMPLOYEE SPILL PREVENTION/RESPONSE TRAINING AND EDUCATION Contractor will provide spill prevention and response training to appropriate construction and inspection personnel. Persons accountable for carrying out the procedures specified herein will be designated prior to construction and informed of their specific duties and responsibilities with respect to environmental compliance and hazardous materials. Contractor is required to maintain a record of those workers who have received training. Note that this training is in addition to the environmental training that will be conducted by the Company. Contractor's training will be provided to inform appropriate personnel of site-specific environmental compliance procedures. At a minimum, this training will include the following: • a review of the Company and Contractor HAZMAT Plan, and discussion of individual responsibilities; • an overview of all regulatory requirements; • methods for the safe handling/storage of hazardous materials and petroleum products; • spill prevention procedures; • operation and location of spill control materials; • inspection procedures for spill containment equipment and materials; • emergency response procedures; • use of personal protective equipment (PPE); • use of spill cleanup equipment; ♦ procedures for coordinating with emergency response teams; • standard information regarding a spill to be provided to Company for agency notification (see Section 6.1); 6. NOTIFICATION AND DOCUMENTATION OF SPILL PROCEDURES Notifications and documentation procedures for all spills that occur during project construction, operation, or maintenance will conform to applicable federal, state, and local laws. Adherence to such procedures will be the top priority once initial safety and spill response actions have been taken. The following sections describe the notification and documentation procedures, and should be implemented in conjunction with the response procedures listed in other sections of this plan. 6.1 REQUIRED NOTIFICATION Notification will begin as soon as possible after discovery of a release. The individual who discovers the spill will contact a Company Construction or Environmental Inspector. If the Environmental Inspector determines that the spill meets the criteria for immediate verbal notification of government agencies (see Section 6.1.3, Reporting Criteria) and/or determines that the spill may threaten human health or the environment, he/she will imrnediately notify Company's Field Supervisor who will snake the required agency notifications as described below. On federal lands, all spills greater than I gallon will be reported. Prior to beginning the notification process, the individual initiating notification should obtain as much information as possible to clearly document and communicate the situation. See Section 6.1.1 for standard information that will be requested by agencies. The following mandatory notifications will be made by the Environmental Inspector. • 911 will be called if the spill is deemed to be an emergency • National Response Center (800) 424-8802 (for amounts exceeding the reportable quantity for that material (see section 6.1.3, Reporting Criteria) • Colorado Department of Health and Environment (303) 692-3500 non -emergency (303) 756-4455 emergency • Local Emergency Planning Committee — notified at the following numbers. • La Plata County Sheriff (Durango, CO) (970) -385-2900 • If the spill or leak has the potential to affect. BLM lands, the State Patrol and BLM must be notified immediately (with respect to the State Patrol, this requirement applies only for spills occurring on State Highway rights-of-way). • If the spill or leak has the potential to affect USFS lands, the State Patrol and USFS must be notified immediately (with respect to the State Patrol, this requirement applies only for spills occurring on State Highway rights-of-way). 6.1.1. Agency Notification When notifying a regulatory agency, the Environmental Inspector will provide the following information: • current threats to human health and safety. including known injuries, if any; spill location (legal land description if available), including landmarks and nearest access route; reporter's name and phone number; time the spill occurred; • type and estimated amount of hazardous materials involved; • potential threat to property and environmental resources, especially waterbodies and wetlands; and • status of response actions. On-site personnel should always consult the Environmental Inspector to clarify regulatory requirements. 6.1.2 Landowner Notification When a spill poses a direct and immediate threat to health and safety andlor property, the landowners potentially affected by the spill will be directly notified by the Company. The Alignment Sheets delineate land ownership along the entire ROW and will be used to determine affected landowners. Immediate notification of landowners is required for all situations in which the spill poses a direct and immediate threat to health and safety andlor property. 6.1.3 Reporting Criteria The Contractor will report to the Company Environmental Inspector all hazardous substance releases regardless of size and petroleum product spills which threaten or enter any waterbody, or that are over 1 quart in size. Verbal reports are required immediately following a major spill when doing so would not delay clean up or administration of urgent medical care. The Company Environmental Inspector will determine if the spill meets the following criteria for immediate agency notification. Any release of hazardous material over the applicable reportable quantities (List of Reportable Quantities), or a petroleum product spill which threatens or enters a waterbody must of reported immediately to the National Response Center (NRC). the BLM, state, and local authorities. On federal lands, all spills greater than 1 gallon will be reported. For petroleum spills over 25 gallons which occur in upland areas notification will be made to the BLM, state, and local authorities. Environmental Reportable Quantities for Select Compounds Compound Release Brine Water Condensate Corrosion Inhibitors Crude Oil Diesel Fuel Diethylamine Diglycolarnine Ethylene Glycol Gasoline Lube Oil Methanol Methyl Mercaptan Mono -ethanolamine Natural Gas Liquids Produced Water RCRA Hazardous Waste Sodium Chromate Surfatron Triethylene Glycol Waste Oil Minimum Amt. 210 gal. or 5 bbl 210 gal. or 5 bbl Consult MSDS 210 gal. or 5 bbl 25 gal 100 lb (13.3 gal) Consult MSDS 5,000 Ibs (545 gal) 25 gal 25 gal 5,000 Ibs (750 gal) 100 lbs (14.1 gal) 100 lbs (15.6 gal) 25 gal 210 gal or 5 bbl 100 lbs. 10 lbs. (0.81 gal) MSDS Consult MSDS 25 gal Verbal Report 24 hours 24 hours 24 hours 24 hours 24 hours Immediately 24 hours Immediately 24 hours 24 hours Immediately Immediately Immediately 24 hours 24 hours imediately Immediately 24 hours 24 hours Immediately Written Report 10 days 10 days 30 days 10 days 30 days 30 days 30 days 30 days 30 days 30 days 30 days 30 days 30 days 30 days 10 days 24 days 30 days 30 days 30 days 30 days 6.2 DOCUMENTATION Contractors will maintain records for all spills. Agencies that the Company verbally notified of a release will be given written notification by the Company within 30 days. Contractor will provide a written report of all reportable spills requiring agency notification within 24 hours (see Attachment 1). The Contractor will record spill information in a daily log. The following is a list of items that should be included in the daily log (as appropriate, based on the spill incident): • time and date of each log entry; • name of individual recording log entry; • list of all individuals notified, including time and date; • type and amount of material spilled; • resources affected by spill; + list of response actions taken, including relative success; ♦ copies of letters, permits, or other communications received from government agencies throughout the duration of the spill response; ♦ copies of all outgoing correspondence related to the spill; and • photographs of the response effort (and surrounding baseline photographs if relevant) Maintaining detailed and organized records during a spill incident is an important and prudent task. One Contractor representative should be designated to manage the records for an incident. If extensive spill response and cleanup operations are required, the Contractor may choose to assign a bookkeeper to assist in the documentation process. The Contractor's on-site bookkeeper will track and manage all expenditures (i.e., equipment, personnel/labor hours, and associated resources) and will help supplement the information provided in the daily log book. RECLAMATION PLAN PETROGULF LAY DOWN YARD Petrogulf Corporation. will comply with the rules and regulations set forth by the Colorado Oil and Gas Conservation Commission (COGCC) as they pertain to the construction, operations, maintenance, and abandonment of this type of facility. More specifically COGCC rules and regulations covered under Series 1000 (Reclamation Regulations) (see Exhibit "A"). The expected life of the Lay Down Yard will be equal to the duration of Petrogulfs operations in the Helmer Gulch Field and surrounding producing areas. Reclamation of the site will consist of the following: 1. Construction Phase (Duration 2 weeks) • Clearing of existing vegetation from the facility site • Excavation and stockpiling of a minimum of 6" of topsoil to be utilized in the construction of berms around the stormwater retention pond. • Excavation and grading of site to a flat condition • Compaction of surface soils • Import of rock, road base material, and gravel to construct surface area of site • Installation of portable pipe racks and storage containers • Landscaping of site to include painting of surface equipment and fencing of site boundary. 2. Post Construction Phase (Duration 1 week) • Cleanup and removal of all trash and debris • Reseeding of all disturbed areas to include topsoil pile and berms. • Continued dust control and mitigation measures • Continued monitoring of revegetation growth. Re-application of seed as required 3. Abandonment Phase (Within 3 months following cessation of operations) • All pipe racks and storage containers as well as all stored equipment and materials to be removed. • Removal of all fencing • Removal of rock and gravel materials from facility site • Restoration and re -contouring of grade to approximately original condition • Replacement of topsoil over disturbed site • Reseeding with certified, weed -free seed mixes as recommended in revegetation plan. • Compliance with all prevailing COGCC and Garfield County regulations and conditions governing final reclamation Prior to abandonment of the water gathering facility, Petrogulf will contact the Garfield County Planning Director to arrange a meeting and joint inspection of the site. This meeting and inspection would take place a minimum of 30 days prior to the abandonment and would be held so that an agreement on an acceptable abandonment plan can be reached. The Abandommnent and Reclamation Plan would be developed to address the bullet points listed above: • February 2007 Craig Richardson Planning Commissioner Garfield County 108 8th Street, Suite 401 Glenwood Springs, Colorado 81635 Re: Noxious Weed Management Plan for McLeod Lay Down Yard Garfield County, Colorado Dear Mr. Craig Richardson: Enclosed with this letter is a noxious weed management plan prepared for the McLeod Lay Down Yard on Taughenbaugh Mesa, south of Rifle, Colorado. This plan was prepared as a component of Petrogulf s request for a special use permit. In addition to the noxious weed management plan, a noxious weed and vegetation survey report is also required. However, during a field visit on February 6, snow cover was too deep and extensive for accurate characterization of either the vegetation or the type and extent of noxious weed infestations. Therefore no data of significant value for generating a survey report was gathered. In a subsequent discussion with Steve Anthony in your office, I explained this problem. I then requested and he agreed that this cover letter mention the difficulties encountered during that survey. And that a condition of approval for this special use permit be completion of a noxious weed and vegetation survey and its associated report as soon as weather conditions permit. If you have any questions regarding the attached noxious weed management plan and/or the yet to be completed noxious weed and vegetation survey and report please do not hesitate to contact me. Sincerely, Christopher C. Hines Grand Junction Branch Manager Biologist / GIS Technician cc: J. Smith (Wagon Wheel Consulting) R. Corka (I'etrogull) File (249) /enclosure NOXIOUS WEED MANAGEMENT PLAN McLeod Lay Down Yard Garfield County, Colorado Prepared for: Petrogulf Corporation February 2007 TABLE OF CONTENTS INTRODUCTION II NOXIOUS WEED SPECIES OF CONCERN 2 MANAGEMENT METHODS 2 Prevention 2 Eradication 3 Physical Control 4 Competitive Vegetation 4 Herbicides Tables Table 1 Garfield County Designated Noxious Weed List 3 Appendices Appendix A Weed Management Strategies Appendix B Project Map • NOXIOUS WEED MANAGEMENT PLAN MCLEOD LAY DOWN YARD GARFIELD COUNTY, COLORADO INTRODUCTION Petrogulf Corporation (Petrogulf) proposes to construct a two acre lay down yard (LDY) approximately two miles southwest of the town of Rifle in Garfield County, Colorado. (NESE, Sec 19, T6S-R93W) The proposed site of the LDY lies entirely within irrigated pastureland owned by Douglas C. McLeod on the eastern end of Taughenbaugh Mesa at an approximate elevation of 5,650 feet above see level, or approximately 400 feet above the Colorado River floodplain. The mesa is characterized by flat to slightly rolling. pastureland dotted with private residences. The project will be referred to as the McLeod Lay Down Yard. The LDY will store piping and other miscellaneous materials used in support of Petrogulf's operations in the area. Construction of the site will involve clearing vegetation, grading the site, and compacting the soil. The site will then be covered with gravel and fenced. The LDY will be kept free of vegetation for the life of Petrogulf operations in the area. The Garfield county weed advisory board identified numerous species of noxious weeds and other invasive plants that are known to occur in Garfield County. This noxious weed management plan provides methods Petrogulf and its contractors will follow to prevent the spread of noxious weeds during construction and for the management of disturbed areas of the project after construction. NOXIOUS WEED SPECIES OF CONCERN Noxious weed and invasive plant species are those that spread into areas where they are not native and typically displace native vegetation or bring about changes in species composition, community structure, and/or ecosystem function. A list of noxious weed species of concern in Garfield County is provided in Table 1. Some specific weeds of concern are; plumeless thistle, Canada thistle, spotted knapweed, and Russian knapweed. Appendix A provides a description of each of the weeds of concern in Garfield County, with specific management objectives regarding their containment or eradication. Petrogulf is committed to the prevention of the spread of noxious weeds associated with construction. A noxious weed survey identifying the location and type of existing weed infestations on or immediately adjacent to the project site, and proposed access roads will • Petrogulf— McLeod Lay Down Yard Noxious Weed Management Plan be conducted during the growing season. The results of the survey will be made available to the Garfield County weed advisory board, upon request. After the yard is constructed, Petrogulf is committed to containment of existing stands of noxious weeds, and eradication of new stands occurring within disturbed project areas. MANAGEMENT METHODS Several weed management methods are described in this section including prevention of the spread of weeds, eradication of new infestations, physical control methods such as pulling and mowing, seeding with competitive vegetation, and the use of herbicides for weed control. In general, the use of herbicides has been found to be the most effective and feasible method of weed control, and will be used everywhere except in isolated locations where other methods are necessary. Prevention Prevention is the most effective, efficient, and Tong -term strategy in the management of noxious and invasive species. Preventing invasions by new plant species and quickly detecting invasions that occur allows for immediate eradication measures to be implemented. Other preventative measures include reestablishing vegetation as quickly as possible in disturbed areas, ensuring that seed supplies are obtained from suppliers who can provide weed -free certified seed mixes, and pressure -washing vehicles and equipment at a sanitary location before they are brought into a work area or in-between work sites if necessary. Contractors may be required to wash all equipment or show proof of equipment washing before entering any of the project states. The inspector will make the decision if pressure -washing is required after passing through an area of noxious or invasive weeds. If areas of noxious weeds are nearly contiguous as might be found along some ROW's, pressure washing each time may not be necessary. Follow up long-term monitoring is also an important preventative measure. Noxious weed monitoring on foot, will be conducted annually for at least three years following construction activities to ensure that noxious and invasive species do not get a foothold along the ROW. Landowner concerns will also be addressed as they arise. Eradication Complete eradication of large areas where infestations are already established may not be possible, as the area is likely to be re -invaded from adjacent lands, unless there are physical barriers that isolate the area. Eradication is most likely possible when the species has just begun to invade and establish itself in a new area, which highlights the importance of early detection and the post -construction monitoring program. Petrogulf will coordinate and cooperate with the landowner and county weed agencies on weed eradication. • Petrogul f — McLeod Lay Down Yard Noxious Weed Management Plan Table 1: Garfield County Designated Noxious Weed List Scientific Name Common Name ('irsium arvense Cichorium intybus Canada thistle Arctium minus Chicory Common burdock Linaria dalmatica Dalmatian toadflax Centaurea diusa Cardaria draba Cynoglossum ofcinale Aegilops cylindrica Euphorhia esula Carduus sp Diffuse knapweed Hoary cress Houndstongue ointed goatgrass Leafy spurge Musk thistle Crysanthemum leucanthemurn Carduus acanthoides Oxeye daisy Lythrum salicaria Centaurea repens Elaeagnus angustifolia Tamarix ramosissima Tamarix parviflora Plumeless thistle iRussian knapweed Purple loosestrife Russian olive Salt cedar Salt cedar Qnopardum acanthium Centaurea maculosa Scotch thistle Spotted knapweed Centaurea solstitialis Linaria vulgaris Source: Garfield County Weed Advisory Board, 2007. Yelloarthistle Yellow toadflax Physical Control Physical control methods range from manual pulling of individual plants to the use of hand and power tools to uproot, girdle, or cut plants. Hand removal by pulling is appropriate when the plants are large enough that they will not break and leave the roots, which may re -sprout. Mowing or cutting of most weed species is seldom successful as this may stimulate lateral growth below the cut portion. This method can be effective in localized or sensitive areas. To be effective, this method must generally be combined with hand application of an herbicide. Petrogulf— McLeod Lay Down Yard Noxious Weed Management Plan Competitive Vegetation The use of native plants species to out -compete noxious and invasive species is an effective, long-term weed control method. Noxious weeds will usually grow in disturbed areas reseeded with native vegetation; however, after a few years, these weeds cannot compete and die off. In areas where noxious weeds have been allowed to flourish, the weeds may likely out -compete the native grasses. In these areas, a more vigorous approach will be needed to rid the area of the noxious weeds. The use of native Pure Live Seed (PLS) mixes will help ensure a healthy and strong revegetated site. See Appendix B for recommended seed mixes. Herbicides The use of herbicides on noxious and invasive plants can be an effective means of control. if herbicides are used, it will be on a plant by plant basis by hand application with backpack sprayers to avoid overspray to non -target species in adjacent plant communities. Broadcast spraying will not be conducted, and spraying will only take place when wind speeds are less than 8 miles per hour. This limits the use of herbicides to isolated stands of plants when individual plants are relatively small is size. Appropriate herbicides would be target -specific and have a short residue time in the environment. Application of all herbicides would be performed by a licensed and certified applicator. Herbicides would not be used within 100 feet of any wetland area or waterbody. Use of herbicides within 100 feet of a wetland or waterbody would be restricted to limited spot treatments. Herbicide options for each noxious weed of concern are listed in Appendix A. REFERENCES CITED Garfield County. 2007. Garfield County —Noxious Weed List. Retrieved from: hit ://www. ,arfield-count .com/home/index.as ? a_re—f 47 4 APPENDIX A WEED MANAGEMENT STRATEGIES Appendix A Weed Management Strategies Canada Thistle (Cirsium arvense): An introduced aggressive perennial with highly developed creeping horizontal roots. Produces from both seed and roots. Flower heads are approximately 0.5 inches in diameter and purple to white in color. Typical plant grows from 1 to 3 feet tall. It is one of the most widespread and economically damaging noxious weeds in Colorado. Infestations are found in cultivated fields, riparian areas, pastures, rangeland, forests, lawns and gardens, roadsides, and in waste areas. Management Objective: Containment Integrated Treatment: Chemical: 2,4-D@ 2 lbs A.E./acre prior to bud; Dicamba @ 2 lbs A.E./acre in rapid growth stage; Curtail plus 2,4-D @. 2 lbs- .25 A.E./acre plus 1.0-1.5 A.E./acre, respectively, prior to bud or late fall; Glyphosate @ .5 to 1.0 A.E./acre. Biological: Three insects currently available, (Canada thistle stem weevil; Canada thistle bud weevil; Thistle stem gall fly). It is best to release a complex of insects. Cultural: Maintain soil fertility and moisture at optimum levels to favor grass growth. Physical/Mechanical: Hand pulling is not effective. Cultivation will reduce density if done repeatedly every three to four weeks. Tillage generally ineffective. Chicory (Cichorium intybus): A simple perennial, reproduces only by seed. The plant has a deep fleshy root and tufted basal leaves that resemble those of a dandelion. The stem is multi -branched and can reach over five feet tall. The flowers are bright blue, purple, or occasionally white, and occur along the stems of plants. Chicory is scattered throughout western Garfield County. Management objective: Containment Integrated treatment: Chemical: Contact Garfield. County applicator for specific recommen Biological: Close grazing by sheep will Cultural: Re -seed disturbed areas appropriate perennial grasses. Physical/Mechanical: None available. Common Burdock (Arctium minus): An invasive biennial introduced from Europe. Upon germination it produces a rosette which winters over. The following spring it bolts and produces a tall erect stem with large basil, cordate, hairy leaves. The flowers are purple in color and approximately 1/2 to 3/4 inch in diameter. The flower head is covered with many slender hooked spines, which readily attach to clothing or passing animals. Vegetation Management or a licensed dations. control the chicory in pastures. adjacent to chicory infestations with • • • Management Objective: Containment Integrated Treatment: Chemical: Best results usually obtained in rosette stage. 2,4-D @ .75 to 1 oz. water or 1 quartlacre. Roundup Ultra @ 1.5 oz/gal or 1 quart/acre; Curtail @ 1.5 oz/ gal of water or 2 quarts/acre; Crossbow @ 1.5 oz/gal of water or 2 quarts/acre. Use nonionic surfactant @ 1 quartlacre. Biological: No effective biological agent known. Cultural: Minimize soil disturbances, encourage desirable plant growth. Livestock grazing usually spreads plant distribution. Physical/Mechanical: Top growth removal through mowing or cutting is effective as is pulling or digging out the plant at flowering or early seed formation. Dalmatian toadflax (Linaria dalmatica): A member of the Figwort family, it was introduced as an ornamental from Europe. It is a creeping perennial with stems from 2 to 4 feet tall. This plant is especially adapted to arid sites and can spread rapidly once established. Because of its beep, extensive root system and heavy seed production, this plant is difficult to manage. Management objective: Containment Integrated Treatment: Chemical: Contact Garfield County Vegetation Management or a licensed applicator for specific recommendations. Biological: The defoliating moth, Calophasia lunula, has been release on Dalmatian and yellow toadflax. It may defoliate up to 20% of the leaves of the plant. Cultural: Reseed disturbed areas adjacent to toadflax infestations with appropriate perennial grasses. Physical/Mechanical: Repeated mowing 2-3 tines per year will slow spread and reduce seed production. Education: The key to Dalmatian toadflax management is to create an awareness among homeowners, nurseries, landscapers, and landscape architects that Dalmatian toadflax is a noxious weed and therefore should not be specified in planting, sold in nurseries or planted in home gardens or large-scale landscape projects. Diffuse Knapweed (Centaurea diffusa): An invasive biennial, annual, or short lived perennial. The plant grows from 1-3 feet in height with a deep tap root. Um -shaped flower heads are 3/16 to 1/4 inches in diameter. Flowers are generally white, with distinctive spiny bracts. Leaves are filiform and deeply divided. Seed viability extends 10 years plus, adding complexity to control. Management Objective: Eradicate Integrated Treatment: Chemical: Picloram @ .25 to .5 A.E./acre; Clopyralid @ .25 to .5 A.E./acre. Chemical control is considered the most cost effective means of control. • s • Biological: Two seed head flies, Urophora anis and U. quadrifasciata, are available. They reduce seed production. A root -boring moth, Agapeta zoegana, causes considerable damage to roots. Cultural; Reseeding of disturbed sites with fasts growing grasses helps prevent diffuse knapweed establishment. Physical/Mechanical: Small infestations can be controlled with hand pulling, if done at least three times a year for several years. Any ground disturbance causes increased plant density. Mowing, while reducing some seed production, is not a viable alternative. Hoary Cress (Cardaria draba): This plant also known as whitetop, is a creeping perennial, which reproduces by seed and creeping roots. The extensive root system spreads vertically and horizontally, with frequent shoots arising from the rootstock. Hoary cress is one of the earliest perennial weeds to emerge in the spring, producing flowers in May or June. It grows in waste places, cultivated fields, and pastures, and is capable of vigorous growth. Management Objective: Containment Integrated Treatment: Chemical: Metsulfuron @ .12 to .45 oz A.Eiacre, applied in spring before flower or in late fall after sufficient moisture has fallen to stimulate over- wintering growth. Picioram is not effective on this plant. Biological: No known biological control is known. Cultural: Mowing or cultivation effectiveness will be increased if other plants like perennial native grasses or alfalfa are seeded in the hoary cress stand as competitors. Maintain range and pasture in good condition. Promote healthy grass growth through proper irrigation and fertilization. Do not overgraze. Physical/Mechanical: Removal of top growth is somewhat effective. Repeated treatments may reduce seed production and spread. Houndstongue (Cynoglossum offncinale): An introduced biennial which grows 1-4 feet in height. Leaves are alternate, up to 12 inches long and 3 inches wide. Leaves are entire, not lobed or toothed. Flowers are a deep reddish purple, small and exist on terminal stems. The fruit is a nutlet approximately 1/3 of an inch long, with many small curved spines, which readily attach to animals or clothing. The plant contains lethal levels of alkaloids, which cause delayed liver disease in animals that consume sufficient amounts. Management Objective: Containment integrated Treatment: Chemical: Tordon 22K @ 1 ozigallon of water or 1 quart/acre; or Clarity at the same rate. Need to add a nonionic surfactant @ 1 quart/acre, or .32 oz/gallon of water. Biological: None know to be effective. • • Cultural: Re -seed disturbed sites with fast growing native grasses. Maintain range and pasture in good condition. Promote healthy grass growth through proper irrigation and fertilization. Do not over graze. Physical/Mechanical: 1-loundstongue is a prolific seed producer, and the seeds are readily spread by their ability to stick to wildlife and domestic animals. Physical removal of the plan at flowering or in early seed formation, by pulling or digging, will break the cycle of the plant. Jointed Goatgrass (Aegil©ps cylindrical): A non-native grass introduced from Turkey in the late 1800s. It is a winter annual, reproducing by seed and grows 15 to 30 inches tall in erect stems which branch at the base to give the plant a tufted appearance. The leaf blades are 1/8 to 1/4 inch wide (usually smooth) with small auricles at the base. The root system is shallow and fibrous. The most distinguishing characteristic is the 2 to 4 inch jointed, cylindrical, balanced seed head. Jointed goatgrass is becoming an increasing problem in the wheat land areas of eastern Colorado. Management objective: Containment Integrated treatment: Chemical: Roundup @ 4-6 oz. per acre applied in late fall or early spring, where desirable perennials are to be retained. If desirable perennials are not present, treat with Roundup @ 1 pint per acre applied while plant is green and growing and prior to seed development. Biological: None known. Cultural: Early livestock grazing can reduce seed production. Physical/Mechanical: Repeated tillage, prior to seed development, will reduce plant density. Fire is also effective in removing seeds. Mowing is not effective, as plants will produce below the severed stem. Mowing in the fall or after seed maturity is a primary factor in spreading contaminated seed. Leafy Spurge (Euphorbia esula): An invasive perennial, difficult to control, and requires long term commitment to achieve control. The plant grows 16 to 22 inches in height. The flowers are small, inconspicuous and surrounded by a pair of yellow -green heart shaped bracts. Seeds are small capsules, which float on water, and are viable for 8- 10 years. The root system when established will be 26-30 feet deep, with numerous laterals. Management Objective: Eradicate Integrated Treatment: Chemical: Piclorarn @ 1 pint/acre combined with 2 quarts of 2,4-D, applied at flowering time (Research indicates that this treatment should result in 85 % success after 4 years of successive treatment.) Picloram @ 1 quart/acre plus 1 quart of 2,4-D gives good fall treatment results. Plateau @ 10- 12 oz/acre plus crop oil (See label). Biological: Sheep or goats will graze leafy spurge. If livestock graze leafy spurge after seed formation, gold the animals in a corral for at least seven days before removing them to an uninfested are to avoid seed spread. Several flea beetles (Aphthona spp.) are available from the Colorado Department of Agriculture Insectary in Palisade. These insects are available upon request at no charge to the public. Also available from the Insectary are the root boring beetle (Oberea erythrocephala), a stem and root crown mining. Tong-horned beetle, and Spurgia esulae, a shoot tip gall midge. Cultural: Any activity that encourages vigorous grass growth is very important. Overgrazing stresses grasses that makes them less competitive to leafy spurge. Physical/Mechanical: Mowing leafy spurge at 14 to 21 day intervals may cause higher susceptibility to fall applied herbicides. Musk Thistle (Carduus nutans): A non-native biennial. Leaves are dark green with a light green mid-rib and white margins. Flowers are solitary, 1.5 to 3 inches in diameter, purple with a distinctive flat top appearance. Management Objective: Containment Integrated Treatment: Chemical: Contact Garfield County Vegetation Management or a licensed applicator for specific recommendations. Biological: Seedhead weevil (Rhinocyllus conicus); larvae destroy developing seed but are not 100 percent effective by themselves. Herbicides can be combined with weevils if the insects area allowed to complete their life cycles. Another weevil, Trichosirocalus hooridus, attacks the crown area of musk thistle rosettes and weakens the plant before it bolts. This weevil has reduced stand density in areas where it has become well established. A leaf feeding beetle, Cassidia rubiiginosa, causes considerable damage by skeletonizing leaves. It is recommended to release mare than one type of insect on a weed since each type may work on different part of the plant. Cultural: Musk thistle, like other biennial thistles, thrives on disturbance. The best management is to minimize disturbance. if it does occur, be certain to revegetate with competitive perennial grasses. Physical/Mechanical: The most effective mechanical control is to hand pull this plant prior to flowering. This can be unrealistic on large acreages or when the ground is very dry. Another option is to use a shovel to cut the root below the surface of the soil, taking care not to disturb the soil more than necessary. If this is done prior to flowering the plan can be left in place after it is cut. if it has already flowered the plant should be removed and placed in a bag and disposed of. Mowing is not effective on this species unless repeated numerous times throughout the growing season since musk thistle will flower and produce seed even after one or two mowings. Oxeye Daisy (Chrysanthemum leucanthemum): An introduced perennial ornamental that is an aggressive competitor. It forms dense patches in meadows, especially in areas grazed by cattle. Flowers are white with a bright yellow center. Leaves are spiral, sessile, and narrow lanceolate. They decrease in size from the ground to the flower head, as contrasted to "Shasta Daisy" which maintains leaf size up and down the stem. Roots are shallow with numerous branched rhizomes and strong adventitious roots. Management Objective: Containment Integrated Treatment: Chemical: The plant is resistant to 2,4-D based herbicides, unless used at or above the 5 lbs A.E./acre. Picloram @ 1.5 pint with i quart of 2,4-Dlacre has been effective in some research trials. Studies also indicate that application of nitrogen fertilizers at rates of 80 -plus pounds/acre is as effective as chemical herbicide treatments. Biological: None currently available. Cultural: None available. Physical/Mechanical: No information available. Education: the key to oxeeye daisy management is to create an awareness among homeowners, nurseries, landscapers, and landscape architects that oxeeye daisy is a noxious weed and therefore should not be specified in planting, sold in nurseries or planted in home gardens or large-scale landscape projects. Plumeless Thistle (Carduus acanth©ides): An invasive winter annual or biennial, which closely resembles Musk Thistle. Stems grow from 1-4 feet in height. Stem leaves are alternate and blend into the stem. Flower heads are a purplish pink, about 1-2 inches in diameter. Under the flower heads exist multiple rows of narrow, sharp spines, which support the pappus. The flower lacks the distinctive flat-topped appearance of Musk Thistle. Management Objective: Containment Integrated Treatment: Chemical: Contact Garfield County Vegetation Management or a licensed applicator for specific recommendations. Biological: Seedhead weevil (Rhinocyllus conicus) Cultural: The best management is to minimize disturbance and revegetate with competitive perennial species. Physical/Mechanical: Mowing is generally not effective on plumeless due to the plant's capacity for rapid re -growth. Hand cutting is not effective unless there are repeated follow-up treatments. Hand cutting should only be conducted if there is a commitment to follow-up efforts. Plumeless tends to branch out where it is cut and then it re -flowers. Pulling plurneless can be very effective, especially if done after a light rain. Hand pulling, with a good set of gloves, is preferable to shoveling. Shoveling disturbs the ground this creating a potential seedbed for future infestations. Purple Loosestrife (Lythrum salicaria): Also known as European wand loosestrife (Lythrum virgatum). An introduced perennial ornamental, commonly associated with waterways. The flower is attractive, with purple flowers vertically arranged on a tall spike. Leaves are lance shaped and notched at the base. They are attached to the stalk without stems in an alternate, opposite, or whorled pattern. A single plant may produce up to 120,000 seeds per stem, which forms a seed bank that is viable for 5-10 years. Control is difficult to achieve, due to association with water. Management Objective: Eradicate Integrated Treatment: Chemical: Glyphosate @ 4 pints/acre applied early to late bloom; 2,4-D @ 1-2 quarts/acre, applied early bud to early bloom; Triclopyr @ .5 to 2 Gal/acre, bud to mid-bloorn. Biological: Biological control may eventually bring weed populations under control, but it will not eliminate or prevent the spread of noxious weeds. Cultural: None available. Physical/Mechanical: Methods include hand pulling, mowing, and flooding. Hand pulling is effective when infestations are detected early. The root system must be completely removed, since the root sections can sprout and form new plants. Education: the key to purple loosestrife management is to create an awareness among homeowners, nurseries, landscapers, and landscape architects that purple loosestrife is a noxious weed and therefore should not be specified in planting, sold in nurseries or planted in home gardens or large-scale landscape projects. Russian Knapweed (Centaurs ripens): A competitive invasive perennial that rapidly establishes dense monocultures. It is allelopathic in nature and detrimental to the health or horses. It has a deep and complex root system which extends vertically 15 to 30 feet with many horizontal rhizomes. The roots have a characteristic black sheath, which is most evident immediately below the ground surface. Stems are erect and open, standing 1-3 feet in height. Flowers are pink to lavender approximately 1/4 to 1/2 inch in diameter. Management Objective: Containment Integrated Treatment: Chemical: Curtail @ 3 quarts/acre or Redeem @ 3 pints/acre applied bud to early flower; Picloram @ .38 lb A.E./acre, pre flower and fall treatment. Biological: No effective biological agent known. Cultural: Russian knapweed tends to from monocultures by eliminating other plants. Therefore, sowing desirable plant species is necessary after the weed is controlled. Research indicates that the native grasses, streambank wheatgrass and thickspike wheatgrass will establish in an area after Russian knapweed is suppressed with herbicides. If the Russian knapweed stand is not too old, and grasses are still present, stimulating grass growth by irrigation (where possible) should increase grass competition with knapweed and keep it under continual stress. Physical/Mechanical: Repeated mowing combined with herbicide application will gradually stress the plant. Russian Olive (Elaeagnus angustifolia): A hardy, fast-growing tree from Europe, Russian Olive has been promoted from windrow and ornamental plantings. This tree may reach heights from 10 to 25 feet. Trunks and branches are armed with l to 2 inch woody thorns. The leaves are covered with small scales which give the foliage a distinctive silvery appearance. Very common in Western Garfield County, especially along the Colorado River between Silt and Rifle. Management Objective: Eradicate Integrated Treatment: Chemical: Contact Garfield County Vegetation Management or a licensed applicator for specific recommendations. Biological: None available, Cultural: Plant native trees or less aggressive introduced trees. In riparian areas establish native riparian vegetation. Physical/Mechanical: Small trees may be controlled mechanically by using an appropriate tool or shovel. Salt Cedar (Tamarix ramosissima and 7. parviflora): A deciduous or evergreen shrub or small tree, 5 to 25 feet tall. It has a wide range of tolerance to saline and alkaline soil and water, It copes with high concentrations of dissolved solids by absorbing them through its roots and excreting salts through glands in its stern and leaves. The excreted salts eventually from a saline crust on the soil. A single plant of salt cedar will use about 200 gallons of water per day while it is actively growing. Introduced from Eurasia, tamarisk is widespread in Garfield County, along the Colorado River from Glenwood Canyon to the Mesa County Line. Management Objective: Eradicate Integrated Treatment: Chemical: Contact Garfield County Vegetation Management or a licensed applicator for specific recommendations. Biological: There are experimental projects being conducted in a few areas in the West involving the release of mealybugs and leafbeetles. These are not cleared for general release. The recent listing of the Southwestern Willow Flycatcher (a native species that nests in salt cedar) under the Endangered Species Act has challenged efforts to move forward with release of insects for biocontrol. Cultural: Establish native riparian vegetation. Physical/Mechanical: Historical saltcedar management projects have included root plowing and raking, dozing, mowing, and prescribed burning. These methods provide only short-term benefits and are labor intensive. • • Scotch Thistle (Onopordum acanthium): Non-native biennial. Leaves and stems have a silvery, gray -green color. The flower is purple, 1-2 inches in diameter. Plant grows in dense stands and will attain heights of 6-8 feet tall. Management Objective: Eradicate Integrated Treatment: Chemical: Contact Garfield County Vegetation Management or a licensed applicator for specific recommendations. Biological: None currently available. Cultural: Reseed disturbed areas with appropriate perennial grasses. Physical/Mechanical: Digging the plant at the rosette stage is effective. Spotted Knapweed (Centaurea maculosa): A biennial or short-lived perennial that has been introduced. It is an aggressive invader, which seriously degrades wildlife habitat, reduces density of desirable plants, and degrades water quality. The flower is purple to pink and is characterized by distinctive spotted bracts below the flower head. Plants grow from 8 inches to 4 feet in height. Difficult to control because of seed longevity and viability. Will germinate throughout the growing season. Management Objective: Eradicate Integrated Treatment: .25 !b Chemical: Clopyralid @ 3 quarts/acre in the bud to bolt stage; Picloram@ A.E./acre while the plant is green; Dicamba'+a. 1 lb A.E.lacre combined with 2,4-D @ 2 lbs A.E.lacre, applied at bud to bolt stage. Biological: Two seed head flies (Urophora affinis and U. quadrifasciata) are capable of reducing seed production by 50%. Root mining insects as well as fungal and bacterial pathogens have shown some promise, but overall it recommended that any biological control be combined with other integrated methods for best results. Cultural: if desirable grass competition is evident in spotted knapweed stands, judicious herbicide application that dos not injure grasses may release them to compete effectively with the weeds. Irrigation may help stimulate grass competition in these cases. Seeding suitable perennial grasses necessary to prevent weed re -invasion. Physical/Mechanical: None available. Yellow Starthistle: (Centaurea solstitialis): An introduced winter annual that is a member of the knapweed family. Flowers are bright yellow and made up of many individual flowers and bracts. Each flower is armed with a ring of stout 1-2 inch spines, which radiates around the flower head. Individual plants can produce up to 150,000 seeds per plant, with 95% seed viability. Germination begins in the late fall and continues through late summer making control efforts difficult. The leaves are largely linear, growing along the stem. The leaves and stems are covered with a silky pubescent, which gives them a silver-gray colored appearance. Management Objective: Eradicate • Integrated Treatment: Chemical: Picloram @ .25 A.E./acre prior to flower; Clopyralid @ .5 to .375 lb A.I./acre prior to flower. (It is noted that applications of Curtail @ 3 quarts/acre or Redeem give adequate control through the flowering stage). Biological: Some success has been achieved with seed weevils and seed flies. In Garfield County, hope is to detect and eradicate any infestations of starthistle before biocontrols are necessary. Cultural: Vigorous competitive grass is essential to maintain a plant community's resistance to starthistie invasion. PhysicalfMechanicai: Mowing or cutting starthistle is rarely effective. Yellow Toadflax (Linaria vulgaris): An introduced perennial ornamental that is highly competitive. Flowers are bright yellow with orange centers, resembling the physical appearance of Snap Dragons. Leaves are narrow, linear, and pointed on both ends. One plant can produce up to 500,000 seeds. Seed viability is + I0 years. Management Objective: Eradicate Integrated Treatment: Chemical: Herbicide success highly variable due plant genetics and soil variation. Treatment of choice involves the application of Picloram @ 1 lb A.EJacre in the fall; Dicamba @ 4 lbs A.E.lacre. Use of a surfactant improves success. Biological: One insect species Calophasia lunula a defoliating moth has been release on yellow toadflax. It may defoliate up to 20 percent of the leaves. Cultural; Attempt to maintain competitive communities of desirable species. Re- seed any open ground with perennial grasses to prevent invasion by other weed species. Physical/Mechanical: Digging and pulling where feasible, can provide effective control of toadflax if conducted annually for 10 to 15 years. Education: the key to yellow toadflax management and other escaped ornamentals is to create an awareness among homeowners, nurseries, landscapers, and landscape architects that Yellow toadflax is a noxious weed and therefore should not be specified in planting, sold in nurseries or planted in home gardens or large-scale landscape projects. APPENDIX B PROJECT MAP STORM WATER MANAGEMENT PLAN PETROGULF INTRODUCTION This Storm Water Management Plan (SWMP) has been prepared for various oil and gas drilling, completion and producing locations within the Rifle, Colorado production fields in order to identify Best Management Practices (BMPs) which will be implemented to meet the terms and conditions of the Colorado Permit for Storm Water Discharges associated with construction activity. The SWMP has been prepared in accordance with good engineering, hydrologic, and pollution control practices, and is designed to constitute compliance with Best Available Technology (BAT) and Best Conventional Technology (BCT), as mandated under the Federal Clean Water Act and the Federal Water Pollution Control Act as well as rules and regulations promulgated by the Colorado Department of Health and Environmental (CDPHE). The SWMP is intended to prevent or minimize the negative impact of soil erosion on the water quality of tributary streams (U.S. waters) and their upgradient water sheds by developing effective engineering design and construction practices. Under state and federal laws, a SWMP is now required for new construction sites that represent a surface disturbance greater than 1 acre (43,560 sgft). PROJECT DESCRIPTION Petrogulf is constructing or has constructed various facilities associated with oil & gas well drilling, completion and production. The general construction sequence for each facility will consist or has consisted of the following: • Clear vegetation and establish perimeter storm water control • Remove and stockpile topsoil, grade and compact the project areas level, and clear and grade right-of-way • Excavate site as required for equipment • Move in and set equipment • Re-seed/reclaim the remaining disturbed area with uniform vegetative cover to at least 70% of pre -disturbance levels • • The total area of surface disturbance for each facility ranges from 1-5 acres. There are no wetland acreage in the area of the Facilities under this SW1V1P. The runoff coefficients for the locations within the project area are expected to vary between 0.10 to 0.30 and are not expected to change significantly following construction. The project areas range from flat unimproved rangeland to mountainous areas with steep slopes. The most common substance that could be spilled within the project area are: 1) fuel and lubricants for construction equipment and vehicles; 2) produced water; and 3) produced crude oil/condensate. No non -storm water components of storm water discharge such as irrigation return flows or spring discharge are anticipated, The potential receiving water body for surface drainage from the various facilities will be the Colorado River which flows through the western 113 of the producing field. • Best Management Practices for Storm Water Management Erosion and Sediment Controls Erosion control will be accomplished through a combination of construction techniques, vegetation, and structural features. 1. Structural Practices The following are structural site management practices, which will minimize erosion and sediment transport. a. To minimize disturbance associated with installation of a facility, level and gently sloping terrain outside the project area will not be graded, except where reasonable for construction equipment stability and fire safety. b. Silt barriers (e.g. brush dams, rock filter dikes, silt fences, hay bales, or water bars) will be installed as needed on down -gradient portions of the project area. c. Side hill cuts will be kept to a minimum to protect local resources while providing a safe and stable plane for the efficient and safe use of equipment. d. Where conditions warrant, erosion control structures such as berms, water bars, diversion or collection channels, terraces, or culverts will be constructed to divert water away from the project area and to reduce soil erosion along and adjoining areas disturbed during construction.; e. In areas of steep slopes that are not annually cultivated, water bars or runoff diversions, will be installed as indicated in Table 1. The water bars will begin and end in undisturbed ground at a 2% slope. f. Culverts may be installed at a grade ranging from 2-5 percent. Inlet protection may include inlet aprons and rock armoring around the culvert perimeter while below grade inlet sumps may be installed to enhance. deposition, Outfall protection may include the use of a rock armored splash pad to slow water. Table 1 Spacing for Erosion Control Structures Sloes Diversion Spacing (Feet) 5 -15 % 300 16-30% 200 30+ % 100 2. Implementation of Structural Practices a. Construction sites may utilize vegetative filters, brush darns, rock filter dikes, silt fences, straw bale dikes, water bars, or equivalent sediment controls installed so as to protect down slope surface waters, wetlands and roads from sediment flow due to runoff from a storm event. b. All grade surfaces, walls, dams and structures, vegetation, erosion and sediment control measures and other protective devices used for erosion control will be maintained, repaired and restored as appropriate. c. All erosion control structures will be inspected at least every 14 days before implementation of the reclamation phase and within 24 hours after a storm event of 1.0 inch or more. Under normal circumstances, deficiencies will be repaired in a timely manner. The designated Inspector will maintain documentation of inspections, findings and corrective actions. 3. Site Preparation a. Existing cover will be removed only where necessary for the operation of equipment. In general, vegetation will be cut off near ground level leaving the root system intact. Cuttings may be stacked into a brush dam, distributed along the contour across reclaimed areas during reclamation or disposed of as directed by the landowner/agency representative. b. Trees and large shrubs that are not cleared from the site will be protected from damage during construction by avoiding them with equipment. For example, bulldozers will maintain their blades in a raised position except for areas designated for clearing or to smooth out sharp breaks in relief. c. Grading outside the project area will be done only when necessary for the safe operation of equipment and for fire protection. d. Trees will be cut or trimmed only to facilitate clearing, grading, and safe installation. 4. Excavation a. Excavated materials will be stored next to the excavation to protect the material from vehicular and equipment traffic. As required by the COGCC Reclamation Regulations all excavation operations on cropland shall separate and store the various A, B, and C soil horizons. b. Excavation in sensitive areas may be conducted according to special techniques as specified by the landowner/agency representative. e. Excavated surface materials will be utilized as backfill when practicable. An exceptidn may be some rock excavated by blasting. In these areas, some select backfill may be • r required to protect the project area. Excess rock may be pushed into rock filter dikes, used in energy dissipation zones below culverts, constructed into rock check darns within grassed swales, distributed over a portion of the project area or disposed of off- site. d, All cuts made in steep rolling terrain during construction will be regraded and contoured to blend into the adjoining landscape and to reestablish the natural drainage patterns. e. Materials that are unsuitable for use as backfill or excess backfill material will be disposed at approved locations, 5. Streams and Wetlands a. During construction near perennial streams, lakes or wetlands, sedimentation (detention) basins, straw bales, or fabric filters may be constructed to prevent suspended sediments from reaching downgradient watercourses, strums, lakes or wetlands. b. Disturbance of riparian and wetland areas will be kept to the minimum needed for construction and installation. c. The first 1.0 feet of topsoil from wetlands will be salvaged and redistributed over the trench as quickly as reasonably possible following installation of the pipeline. The seeds, roots, rhizomes, tubers; and bulbs present in the topsoil will enhance and help speed up reclamation of wetlands disturbed by construction. d. Where appropriate, water bars or sediment filters, suck as staked straw bales or silt fences, will be constructed adjacent to the crossings to reduce potential sedimentation in streams or wetlands. Trenching will cross dry streams. Small flowing streams will be crossed by flzirning or trenching with a downstream silt barrier to reduce downstream sedimentation. Materials Handling and Spill Prevention Hazardous materials and petroleum products to be used in construction of the Facility are limited to fuel and lubricants for construction equipment and vehicles; small quantities of paints and solvents; water or gel based frac fluids (surfactant, friction reducer, acid, potassium chloride) using during completion; produced water; and, crude oil/condensate. Refueling and lubrication of vehicles will be conducted a minimum of 100 feet back from flowing streams and wetlands. Spills will be promptly cleaned up and contaminated materials hauled off-site and disposed of/recycled properly. Quantities of materials on site will be limited to "as -needed" for the immediate operations underway. Other Controls All wastes from materials imported to the construction site are to be removed for disposal/recycling to an appropriate licensed disposal/recycling facility, including sanitary sewage facilities (typically portable). No wastes of imported materials shall be buried, dumped, or discharged to waters of the State. There are no other pollutant sources from areas other than construction areas expected. To prevent tracking of sediment onto public roads, the proposed facilities shall have, at a minimum, connpacted ingress and egress areas adjacent to public roads. Other means such as using gravel, scoria, or cattle guards may be utilized if appropriate. Maintenance Maintenance will be the responsibility of the Company. Maintenance will be performed on an as -needed basis based upon the results of inspections conducted at the site, INSPECTION Inspections will be conducted at least every 14 calendar days and within 24 -hours of any precipitation event exceeding 1.0 inch during constru.ction and prior to initiating reclamation. After reclamation has been initiated inspections will be conducted at least every 30 -calendar days and within 24 -hours of any precipitation event exceeding 1.0 inches until uniform vegetative cover of at least 70% of pre -disturbance levels has been achieved. Inspections will be documented and these records kept on file for three years following reclamation. All negative inspection results will be corrected as soon as practicable. FINAL STABILIZATION AND LONG-TERM STORM WATER MANAGEMENT Reclamation a. Unless otherwise directed by the landowner or the jurisdictional authority, rocks, cut vegetation and other surface material temporarily stockpiled for construction will be redistributed back across non -fenced portions of the proj ect area following construction. b. Disturbed areas will be seeded using seed mixes appropriate to the location. Local soil conservation authorities with the U.S, Natural Resources Conservation Service, surface owners and/or reclamation contractors familiar with the area may be consulted regarding the correct seed mix to be utilized. c. On terrain where drill seeding is appropriate, seed may be planted using a drill equipped with a depth regulator to ensure proper depth of planting. The seed mix will be evenly and uniformly planted over the disturbed area. Drilling will be used where topography and soil conditions allow operation of equipment to meet the seeding requirements of the species being planted. d. Broadcast seeding will occur on steep terrain and on areas such as where the cut vegetation and rocks were redistributed over the right-of-way. e. Seeding will be done when seasonal or weather conditions are most favorable according to schedules identified by the jurisdictional authority, reclamation contractor, or landowner. Whenever possible, seeding will be timed to take advantage of moisture, such as early spring or late fall to benefit from winter precipitation. f. Seed mixes will be planted in the amount specified in pounds of pure live seed/acre, where necessary. There will be no primary or secondary noxious weeds in the seed mix. g. The reestablishment of vegetative cover as well as watershed stabilization measures will be scheduled during the working season and before the succeeding winter. In any case, revegetation treatments will be accomplished as soon as practical following completion of facility construction. h. In general, the applicable portions of the project area will not be mulched during reclamation and revegetation. Mulch will only be applied at the request of the jurisdictional authority in areas where the cut vegetation and rocks are not redistributed over the disturbed area. (The cut vegetation and rocks will act like mulch in the areas where they are applied) Where straw or hay mulch is requested, the mulch will be applied and crimped into the soil. i. The need for fertilizers will be determined in conjunction with the jurisdictional authority. If fertilization is necessary, the rates of application will be based on site- specific requirements of the soil. 2. Post -Construction Structural Measures a. Permanent water bars will be installed on steep slopes according to Table 1 and at wetland and stream crossing boundaries. b. Trench plugs will be installed on steep slopes according to Table 1 and at wetland and stream crossing boundaries. c. After restoration work is complete, required repairs to vegetation, erosion, and sediment control structures will be completed along with routine scheduled pipeline inspections and/or in response to other notification. • • STATE of COLORADO Bill Owens, Governor Douglas H. Benevento, Executive Director Dedicated to protecting and improving the health and environment of the people of Colorado 4300 Cherry Creek Dr, 5. Laboratory and Radiation Services Division Denver, Colorado 80246-1530 8100 Lowry Blvd.I + rF Pi) Phone (303) 692-2000 Denver, Colorado 80230-6928 TDD Line (303) 691-7700 (303) 692-3090 _ Located in Glendale, Colorado t SEP 2005 http;Ilwww. cdphe.state.co. us 11 September 20, 2005 Betty A. Pennington, Executive V.P. Petrogulf Corp. 518 17th Street Ste. 1455 Denver, CO 80202 303/893-5400 RE: Final Permit, Colorado Discharge Permit System — Stormwater Certification No: COR -038944, Garfield County Helmer Gulch Colorado Department of Public Health and Environment Local Contact: Raymond M. Gorka, Environmental Regulatory Compliance Manager, 3031893- 5400 Anticipated Activity: September 20, 2005 through 08/30/2007 On 3.2 acres (2.7 acres disturbed) Dear Sir or Madam Enclosed please find a copy of the permit certification that was issued to you under the Colorado Water Quality Control Act. Your certification under the permit requires that specific actions be performed at designated times. You are legally obligated to comply with all terms and conditions of your certification. Note that the stormwater permit for construction activities now covers construction sites disturbing down to one acre (the previous threshold was 5 acres). Effective July 1, 2002, any construction activity that disturbs at least 1 acre of land (or is part of a larger common plan of development or sale that will disturb at least 1 acre) must apply for permit coverage. Please read the permit and certification. If you have any questions please visit our website at http:llwww.cdphe.state.co.uslwglpermitsunitlwgcdpmt.html, or contact Matt Czahor at (303) 692-3575. Sincerely, Kathryn Dolan Stormwater Program.Coordinator Permits Unit WATER QUALITY CONTROL DIVISION Enclosure xc: Regional Council of Governments Garfield County Health Department District Engineez,Technical Services, WQCD Permit File PETR GULF CORPORATION HELMER GULCH STORM WATER MANAGEMENT PLAN November 2005 Updated, August, 2006 Petrogulf Corporation 518 17th Street, #1455 Denver, CO 80202 Table of Contents 1. SITE DESCRIPTION 3 2. SITE MAP 5 3. CONTROLS - GENERAL BEST MANAGEMENT PRACTICES 6 4. MATERIALS HANDLING AND SPILL PREVENTION 7 5. FINAL STABILIZATION AND LONGTERM STORM WATER MANAGEMENT 7 6. OTHER CONTROLS 8 7. INSPECTION AND MAINTENANCE 8 8. TERMINATION 9 9. PLAN RETENTION 9 10. CERTIFICATION 9 Appendix A: Site Map, List of Construction Site Location 10 Individual Site Forms Appendix B: Best Management Practices (BMPs) 16 Appendix C BMP Diagrams 33 Appendix D Inspection; Instruction Sheet and Form 140 Appendix E Copy of General Permit Application, 144 Notice of inactivation Form Appendix F: •Runoff Coefficient Table 146 Individual Site Form 148 Petrogulf Corporation Helmer Gulch SWMP 2 Update August 2006 PETROGULF STORM WATER MANAGEMENT PLAN For The Helmer Gulch Project Petrogulf Corporation plans to develop its Helmer Gulch lease, which encompasses Sections 19, 20, 29, 30, and 31 of T6S; R93W in Garfield County, Colorado. This project is being undertaken to evaluate and produce the marketable hydrocarbon resources in this acreage. 1. SITE DESCRIPTION Petrogulf will be employing the latest production practices in the area by constructing up to 12 wells per pad to minimize surface disturbance in the area. Each well pad is expected to disturb about 4 acres. Associated roads will contribute minor additional disturbance. Total disturbance per pad is expected to be approximately 6 Acres. The project area is located in the Southern Rocky Mountain physiographic province along the northern slopes of Battlement Mesa. The Colorado River valley is directly north. The site location is on a terrace remnant with sediments dominated by Quaternary age Bull Lake and Pinedale gravels and alluviums at the foot of Flatiron Mesa. The river and tributaries, including the Helmer Gulch drainage which cuts through the north end of the project area, have cut through older, Tertiary -age Wasatch and Ohio Creek Formation sandstones, claystones, mudstones, and conglomerates. Surface sediments consist of a brown to reddish brown silty loam with angular to subangular gravels and cobbles. The elevation of the project area runs from 5320 feet to 7540 feet above sea level. Vegetation is open juniper woodlands, with open sagebrush meadows interspersed throughout the area. Vegetation groundcover throughout is generally well spaced and healthy. The bottom of Helmer Gulch is covered in Cheat and Pepper grass with alfalfa and hay fields on private property. Every well pad will have specific requirements for construction which will be negotiated with the surface owner or manager, or United States government under the Bureau of Land Management. In addition, each pad will be assessed as to the best erosion control technique to be used. Appropriate construction techniques are being implemented to minimize the addition of solid from the sites onto adjacent leases. Erosion control helps to eliminate the addition of solids to flowing rivers which contributes to the degradation of drinking water in the US. These best management practices (BMPs) will be discussed in detail later in this plan. A. DESCRIPTION OF CONSTRUCTION ACTIVITY 1. CONSTRUCTION OF THE ROADS: • Disturbance of new areas should be avoided whenever possible. Whenever possible, existing roads will be utilized or expanded to minimize the amount of surface disturbance. • Roads are placed in order to minimize cut and fill requirements. • Roads are placed and constructed to avoid erosion potential to the greatest degree possible. Petrogulf Corporation Helmer Gulch SWMP 3 Update August 2006 • In some instances, the natural substrate is sufficient to stabilize the road; otherwise, roads are graveled where necessary. • Dust control measures will be utilized, wetting with either water or magnesium - Chloride shall be used as needed. • If cut and fill is necessary, those areas are stabilized with gravel, natural substrate, and reestablishment of vegetation or with alternative means. • Site-specific BMPS are implemented where necessary to control erosion due to road construction. • It is difficult to specifically name which "BMP" will be used at a specific road. In some instances none will be needed. Field inspections will determine which BMPs may be needed and where. Obvious devices will be installed as soon as deemed necessary. 2. CONSTRUCTION OF THE WELL PADS: • The well pads will be constructed as small as possible to minimize soil and surface disturbance. • The pads will be excavated and/or filled to grade to alleviate severe slope conditions. • Hay bales, interceptor berms, water bars, perimeter ditches and/or interceptor swales will be placed up gradient of the sites as needed to divert storm water around the disturbed area. • The topsoil and spoil material will be stockpiled appropriately. • The reserve or Frac pits will be excavated and the spoil material will be stored on the edge of the site. • After the wells are drilled and the production equipment is set, the sites will be graveled and/or compacted to stabilize conditions. • Site-specific BMPs are implemented where necessary to control erosion due to well pad construction. • Fill areas and stock piled soil will be reseeded as needed to permanently stabilize the soil. • Fill slope toe areas will have silt fences or perimeter ditches, or some other type of erosional control device installed. The slope will be re -vegetated as the season allows to minimize rill formation and erosion to the pad site. B. SEQUENCE OF EVENTS 1. Construction of the roads: Roads are located and constructed prior to well drilling. Roads are graveled and/or otherwise stabilized where necessary. Erosion control is implemented where needed. Site maps show what BMPs are used where on each site. 2. Construction of the well pads: Well sites are built and the reserve pit is excavated. Pads will be inspected to determine what bmps' should be installed, which practices followed, to minimize and eliminate erosion as quickly as possible. Usually, silt fences or perimeter ditches are installed/constructed as the pad is being built. Petrogulf Corporation Helmer Gulch SWMP 4 Update August 2006 • The wells are drilled, completed and then production equipment is set, Petrogulf may re- enter the well pad to drill more wells than are originally drilled at the site. After production equipment is set, the producing area is graveled and/or compacted. The life of the wellpad begins with the construction of the site. Wells in this part of the basin are expected to produce, be active, for 20 years, During this time frame, wells will be drilled, serviced, equipment brought to the site, taken off, and inspected daily or at least weekly. The sooner the site is stabilized against stormwater runoff, the better for the environment, the landowner, the neighborhood, and the company. The site interim reclamation goal is to have the fill and cut slopes stabilized with grasses, the pad edges bermed and also vegetated to eliminate runoff. Perimeter ditches will be utilized over silt fences because of the long term benefit and cost benefit of their use. C. AREA OF DISTURBANCE The estimated area of disturbance will cover approximately 6 acres per pad. It is projected that there will be a maximum of 30 pads built in the project area. D. ESTIMATE OF RUNOFF COEFFICIENT The construction sites will be located on some improved areas, pasture land, and on previously unimproved areas. The runoff coefficient for unimproved areas is 0.10 to 0.30 The relatively fiat terrain and established vegetation present in this constructioi site indicates the runoff coefficient would be in the lower limits of the 0.10 to 0.30 range. S Several planned well pads will be set on steep slopes, and will incorporate engineering techniques to ensure minimum erosion to the soil and surrounding areas. • E. DESCRIPTION OF EXISTING VEGETATION Vegetation at these construction sites consists of small juniper woodlands, with open sagebrush meadows interspersed throughout the area and pine trees. There are grassy pasture lands to the north end. The raw land is a mixture of forest and open range. Vegetative cover on the project area is approximately 85%. The Individual Site Form located in Appendix A describes existing vegetation at the construction site. F. OTHER POTENTIAL POLLUTION SOURCES During drilling activities; drilling, completion and production chemicals and petroleum based substances will be stored on site. The raw materials will be placed on pallets and covered from the elements to minimize waste and unintentional contact with the environment. Some of these substances will be used and in the reserve pit. The drilling contractor will have adequate spill prevention and spill response procedures in place. These stockpiles of supplies are for use during drilling activities. These stock piles of supplies move with the drilling rig, and are not left behind. Site maps show where these materials are stored. G. NON-STORMWATER DISCHARGE Non-stormwater discharges are not expected at any site in the project area. in the event of an unexpected spill, proper procedures will be in place to ensure cleanup to restore the site. The Petrogulf Corporation Helmer Gulch SWMP 5 Update August 2006 drilling contractor is responsible for the daily activities on site and have been trained in the event • of a spill. • • H. RECEIVING WATERS The construction area is located in the Helmer Gulch Basin. Runoff from the field development will flow into this drainage/intermittent stream and then to Last Chance Ditch and then into the Colorado River. 2. SITE MAP A site map for the project area is contained in appendix A. The site map for each pad/well site will be updated as needed to reflect field conditions during construction. Examples of the pads are also found here. 3. CONTROLS - GENERAL BEST MANAGEMENT PRACTICES The following is a list of common Best Management Practices (BMPs) which Petrogulf employs during construction activities. Erosion control implementation will be conducted under the guidance of persons experienced in construction techniques. Local factors will be evaluated to determine what BMP's are suitable and practical for each construction site. A. EROSION CONTROL 1. The size of each construction site will be kept as minimal as possible due to constraints of the landowners and the BLM. Each pad will be minimized to the extent practical to prevent unnecessary disturbance of local soils. Significant grade changes will be minimized when practical. 2, Water diversion structures will be constructed when deemed appropriate. These structures include hay bales, interceptor berms, water bars, silt ditch and interceptor swales. A list and explanation of BMPs is included in Appendix B. 3. Roads and the well pad will be stabilized as soon as practical after construction. B. ROAD CONSTRUCTION 1. Existing roads are will be used whenever possible. 2. Roads are placed along flat ridgelines where possible. Roads are placed to avoid erosion potential to the greatest degree possible. 3. Stream Crossings are avoided when possible. Existing crossings or bridges will be used. If a stream will be crossed culverts will be put in place. 4. Vehicles are confined to authorized traffic routes. C. WELL PADS 1. Slopes will be minimized to lessen erosion rates, and to keep precipitation which does not fall on the pad off the pad and what falls on the pad stay as to the extent possible. Sediment settlement ponds will be incorporated when necessary. Reseeding will begin when practical. The fall and spring will be primary seeding times. Petrogulf Corporation Helmer Gulch SWMP 6 Update August 2006 • 2. Wetlands, shallow ground water, and flood plains are to be avoided whenever possible. 3. The well pad will be constructed as small as possible to minimize soil and surface disturbance. 4. Hay bales, interceptor berms, water bars, perimeter ditches and/or interceptor swales will be placed up gradient of the site to divert stormwater around the disturbed area. 5. Trenches will be dug around the rig to collect spills and wash water. 6. Absorbents, drop liners, and catch basins are used to collect spills and drips. D. SPACING FOR EROSION CONTROL 1. If waterbars are necessary, waterbar spacing on the location will be as follows: % SLOPE SPACING INTERVAL 2 or less 200 feet 2to4 100 feet 4 to 5 75 feet 5 or more 50 feet E. RE -SEEDING 1. Where necessary, disturbed areas will be re -seeded as recommended by the Surface Management Agency or the Soil Conservation Service. Seed will be planted using a drill, and in areas not suitable for drilling, the seed will be broadcasted and raked, or chained to cover the seed. Re -seeding will begin as soon as practical after the pads have been built and production equipment has been removed from the site or not scheduled. 2. On BLM lands, seeds which meet the strict requirements of the Glenwood Springs Energy Office will be used after an approximate 2 week time needed to have the seeds pass their tests. F. STORMWATER MANAGEMENT 1. To prevent or control potential erosion, hay bales, silt fences, mulch, interceptor dikes and ditches and swales are utilized where necessary. These structures either prevent runoff from flowing over disturbed areas or dissipate the velocity and reduce the sediment loading of disturbed area runoff. Specific BMPs are listed and explained in Appendix B. 2. To prevent or control potential erosion, water bars, drainage dips, and wing ditches are utilized where necessary. These structures divert the water runoff from the disturbed areas into the vegetated areas, dissipate the velocity, and reduce the sediment loading. Specific BMPs are listed and explained in Appendix B. 3. See individual construction site maps in appendix A for specific BMPs at specific locations. Petrogulf Corporation Helmer Gulch SWMP 7 Update August 2006 • • • 4. MATERIALS HANDLING AND SPILL PREVENTION During drilling activities; drilling, completion and production chemicals, fuels, and crude oil products may be stored on site. Precautions to protect the environment are in place on the drilling pad during operations. Ditches are dug around the rig to collect excess fluid and divert them to the frac pit. The drilling contractor will have adequate spill prevention and spill response procedures in place. The drilling contractor is responsible for any spills which may occur on the drilling pad. in the event of a spill, local roustabout crews will respond with vacuum trucks, booms, and other spill related equipment. Also, a company representative will be available to respond to state and local authorities as to the cleanup efforts if needed. 5. FINAL STABILIZATION AND LONGTERM STORM WATER MANAGEMENT A. Final Stabilization of Well Pad: Following initial construction activities, the well pad is stabilized. The area of vehicle travel and production equipment is graveled. The rest of the well site is considered finally stabilized after the site has been revegetated, compacted and/or graveled. Natural substrate may also serve as stabilization material. B. Final Stabilization of Roads: Roads are considered finally stabilized after they are compacted and/or graveled. In some cases, it may be necessary to stabilize road banks with natural substrate, gravel, revegetation or other appropriate stabilization techniques. 6. OTHER CONTROLS A. All equipment and vehicular access is confined to existing roads and the established right of way corridor. B. No construction or routine maintenance activities will be done during periods when the soil is too wet to adequately support construction equipment. If such equipment creates surface ruts in excess of 12 inches deep, it will be deemed that the soil conditions are too wet to adequately support construction equipment. Construction activities will not continue until soil conditions improve. C. Construction sites shall be maintained in sanitary conditions at all times; waste materials at these sites shall be disposed of promptly and at appropriate waste disposal sites. D. A contractor will be used to provide and maintain potable toilets where necessary. 7. INSPECTION AND MAINTENANCE A. Maintenance The new construction sites will be routinely patrolled and inspected by an authorized company employee or representative to check for problems, such as erosion, erosion control failure, right of way condition, unauthorized encroachment on the right of way, and any other situations that could cause a safety or environmental hazard, or require preventive maintenance. Petrogulf Corporation Helmer Gulch SWMP 8 Update August 2006 B. Inspection 1. Inspection of the construction areas will be performed by the field supervisor and field personnel. a. During construction, the disturbed areas, structural control measures, and locations where vehicles enter the site shall be inspected at least once every fourteen (14) -calendar days and within 24 hours of any precipitation and/or snowmelt event that causes surface erosion. b. After completion of the construction, but prior to returning the disturbed areas to approximate preconstruction conditions, the disturbed areas shall be inspected at least once a quarter. c. An inspection report shall be immediately prepared and signed by the individual conducting the inspection. If the report describes deficiencies in pollution control structures or procedures, such deficiencies shall be corrected as quickly as possible. d. Copies of the inspection form and an example are attached as Appendix D. C Retention of Reports 1. Copies of the inspection reports shall be retained at the construction site except when the project is shut down for the season. If necessary, during seasonal shutdown, copies of the inspection reports shall be retained at the permittee's field office. 2. Copies of the reports shall be provided to the Administrator upon request, and such reports shall be retained by the permittee for a minimum of three years. D. Collection and Submission of Self Monitoring information 1. Upon written notification from the Administrator, the permittee shalt collect and report storm water effluent or ambient water quality data of the type and at the frequency specified by the Administrator. 8. TERMINATION A. Notice of Inactivation 1. When the project has been finally stabilized so that the slopes and vegetation approximate preconstruction conditions, the permittee no longer requires coverage under this permit. At that time, the permittee shall submit to the Administrator the Inactivation Notice included as Appendix E of this permit. 2. Upon receipt of the notice, the Administrator will provide the permittee with written confirmation that coverage under this permit has been terminated. 9. PLAN RETENTION During construction, the pollution prevention plan shall be retained at the construction site whenever practical. During seasonal shut downs, the plan shall be retained at the permittee's off-site office. A copy of the plan shall be made available to the Administrator upon request. Petrogulf Corporation Helmer Gulch SWMP 9 Update August 2006 • 10. CERTIFICATION To the best of my knowledge, this pian is accurate and representative of the conditions at this site and includes the control procedures that will be employed during construction. NAME TITLE DATE Petrogulf Corporation Helmer Gulch SWMP 10 Update August 2006 Appendix A Site Map & List of Construction Site Location Petrogulf Corporation Helmer Gulch SWMP 11 Update August 2006 • Helmer Gulch Well Pads as of September, 2006 Locations, In order of constructed of sites. • Name '/ 1/ Sec. Status as of date Hooker Pad NW NE 30 4 wells producing, awaiting closure of Reserve pit Mead B SW SW 30 4 wells drilled, waiting on Frac crews Jonsson B SE NE 19 Flowing back the wells, Mead A NW SW 30 1 well drilled, site in wait on rig mode Mead C NE SW 30 Site built, waiting for a rig to drill Overacher SW SW 29 Site built, waiting for a rig to drill Federal 31-41 NE NE 31 Active Drilling pad Petrogulf Corporation He#mer Gulch SWMP 12 Update August 2006 • Helmer Gulch Well Pads as of August, 2006 Locations, In order of constructed of sites. Name Hooker Pad Mead B Jonsson B Mead A Mead C Overacher Federal 31-41 1/ 1/. NW NE SW SW SE NE NW SW NE SW SW SW NE NE Sec. Status as of date 30 4 wells producing 30 4 wells drilled, waiting on Frac crews 19 Fracing 4 wells now 30 Drilling now 30 Site built, waiting fora rig to drill 29 Site built, waiting for a rig to drill 31 Building road now, pad next to drill Petrogulf Corporation Helmer Gulch SWMP 13 Update August 2006 Petrogulf Corporation: Garfield Co., Colorado September, 2005 Petroguif Corporation Helmer Gulch SWMP 14 Update August 2006 Iota Petrogulf Corporation Heirner Gulch SWMP 15 Update August 2006 • Silt Fence N Meter Station Production Unit irk Production Tanks Fill Slope Wellheads Road from County RD 317 *Not to Scale Petrogulf Corporation Helmer Gulch SWMP 16 Update August 2006 • • Appendix B Best Management Practices (BMP) Petrogulf Corporation Helmer Gulch SWMP 17 Update August 2006 • Best Management Practices (BMP) In order to address the requirements of storm water pollution at construction sites, a variety of techniques are usually employed to reduce soil erosion, site sediment loss, and manage construction -generated waste. This section provides design criteria for a variety of techniques to address these issues. These techniques, or BMPs, consist of both temporary and permanent solutions to reduce pollution from a construction site. The majority of best management practices (BMPs) address onsite soil losses. For construction sites, soil loss usually is in the form of erosion and sedimentation, because of storm events and wind. These forces produce the majority of pollution generated from a construction site. BMPs which address erosion and sediment control are much more site specific than waste management techniques. Erosion and sediment control BMPs are dependent upon site slopes, drainage patterns and quantities, and other site-specific conditions. Waste management consists of "good housekeeping" practices which are dependent upon the type of construction and the quantity and type of building materials. The following provides a method of selecting BMPS applicable to construction sites along with design criteria for each BMP. There may also be state or local manuals which list common BMPS for your region. In preparing the SWPPP, the designer must first use the BMP selection guide to determine BMPS applicable to the site. The fact sheets following the selection guide detail the design and maintenance requirements, limitations, and purpose of each design and the techniques, These provide the tools for the designer to select the appropriate BMPS and locate them onsite to effectively reduce sediment Toss and erosion. Information is also provided on maintenance of the control devices, as well as what should be checked during required inspections. For the preparation of this document, the State of Californias' Storm Water BMP Handbook was used. It is a very good reference on BMPs with much detail. The site can be found at www.cabmphandbooks.com Petrogulf Corporation Helmer Gulch SWMP 18 Update August 2006 • t • BMP SELECTION GUIDE Erosion Control - These BMPs protect the soil before erosion occurs. They are primarily used around areas of construction to either limit the flows across the site, or limit the erosion in areas disturbed but not active. BMP Name Primary Purpose Rating Silt Fences Detain sediment —laden water, provide for sedimentation behind the fence Very Effective Diversion Dike Route flows around areas of disturbance Very Effective Gravel Bag berm Pond sheet flow runoff, allowing sediment Effective Perimeter Control Ditch Prevent sediment from leaving the site, allows water to flow Very Effective Fiber Rolls Intercept runoff, reduce flow and velocity and provides sediment removal from runoff Very Effective Pipe Slope Drain Route overland flow on a slope into a pipe to protect the slope Effective Vegetation Provide natural soil protection through seeding, hydro -mulch or phasing Very Effective Preservation of Existing Vegetation Careful preservation of existing vegetation minimizes removal of trees, grasses, etc. which preserves soil Effective Mulching Protect disturbed soil with a layer of hay Very Effective Erosion Control Mats Protect disturbed soil or slopes with geo- textile and biodegradable fabrics Effective Many of these BMPs will be used in the construction and development of the Helmer Gulch project. Site specific BMPs will be chosen on an as best basis, depending on time required, cost to install, and availability of expertise to install and maintain. Preventing soil loss from the area is a concern for Petrogulf as is the prevention of additional silt and soil into the Colorado River. The industry in the area is under scrutiny from the public and regulators and Petrogulf wishes to minimize erosion as much as possible. Petrogulf Corporation Helmer Gulch SWMP 19 Update August 2006 SEDIMENT LOSS PREVENTION Construction activities normally result in disturbance on the site due to wading operations, clearing, and other operations. Erosion will occur in these disturbed areas and BMPS must be used to contain the sediment from these disturbed areas. The following techniques reduce soil loss from the site by retaining the soil through sedimentation or filtration of the runoff. BMP Name Primary Purpose Rating Silt Fence Slow and filter runoff to retain sediment Effective Straw Bales Slow and filter runoff to retain sediment Effective Perimeter Control Ditch Stop sediment from leaving site, allow water to flow Very Effective Sediment Basin Large pond with controlled outflow which allows sediment to settle out of runoff Very Effective and strongly recommended for sites larger than 10 acres Stabilized Construction Entrance Reduces offsite sediment tracking from trucks and construction from equipment Moderate Effectiveness but required to address offsite tracking Sandbag Berm Provide sedimentation and filtration for runoff under concentrated conditions in creeks, channels, and drainage swales Effective For Severe Applications Wind Erosion Control Applying water or dust palliatives to prevent/alleviate dust nuisance generated by construction activities Effective Hydraulic Mulch Protects exposed soil from erosion by raindrop impact or wind Effective Check Dams Reduce velocity of surface flow and reduce amount of sediment traveled Very Effective Interceptor Swale Route flows around areas of disturbance Very Effective Petrogulf Corporation Helmer Gulch SWMP 20 Update August 2006 • WASTE MANAGEMENT These techniques will be used on the majority of construction projects due to their general application of reducing waste from construction activities. They form the basis of general housekeeping procedures which should be followed during construction. BMP Name Primary Purpose Rating Solid Waste Management Techniques for management of paper, packaging, general building materials, etc. Very Effective Material Use Prevent/reduce the discharge of pollutants by using alternative products, minimizing hazardous material use onsite, and training employees and contractors. Effective Hazardous Waste Management of paints, chemicals, Management fertilizer, oil and grease, etc. Very Effective Liquid Waste Management Procedures and practices to prevent discharge of pollutants to watercourses as a result of the creation, collection, and disposal of non -hazardous liquid wastes. Very Effective Spill Prevention and Control Prevent/reduce discharge of pollutants by reducing the chance for spills, stopping the source of spills, containing and cleaning up spills, properly disposing of spill materials, and training employees. Very Effective Sanitary/Septic Waste Management Proper sanitary and septic waste management prevent the discharge of pollutants by providing convenient, well-maintained facilities, and arranging for regular service and disposal. Very Effective For detailed descriptions on use of specific BMPs, refer to the Appendix C of this report when needed. Some of the more common BMPs are explained below. Silt Fence Description A silt fence consists of geotextile fabric stretched between either wooden or metal posts with the lower edge of the fabric securely embedded in the soil. The fence is typically located downstream of disturbed areas to intercept runoff in the form of sheet flow. Silt fence provides both filtration and time for sedimentation to reduce sediment and it reduces the velocity of the Petrogulf Corporation Helmer Gulch SWMP 21 Update August 2006 • runoff. Properly designed silt fence is economical since it can be relocated during construction and reused on other projects. Primary Use Silt Fence is normally used as a perimeter control for downstream of construction sites. It is only feasible for non -concreted, sheet flow conditions. Applications Silt fence is an economical means to treat overland, non -concentrated flows for all types of projects. Silt fences are used as perimeter control devices for both site developments and linear (roadway) type projects. They are most effective with coarse to silty soil types. Due to the potential of clogging, silt fence should not be used with clay soil types. In order to reduce the length of the silt fence, it can be placed adjacent to the downstream side of the construction activities. Design Criteria Fences are to be constructed along a line of constant elevation (along a contour lime). Maximum slope adjacent to the fence is 1:1. Maximum distance of flow to the silt fence shall be 150 feet. Maximum concentrated flow to silt fence shall be 1 CFS. If 50% or less of the soil, by weight, passes the U.S. Standard sieve No. 200, Select the Equivalent Opening Size (E. 0. S.) to retain 35% of the soil. Maximum EQS shall be 70 (#70 sieve). Minimum EQS shall be 100 (#100 sieve), If 85% or more of soil, by weight, passes the U. S. Standard sieve No. 200, silt fences shall not be used due to clogging. Sufficient room for the operation of sediment removal equipment shall be provided between the silt fence and other obstructions in order to properly maintain the fence. The ends of the fence shall be turned upstream to prevent bypass of storm water. Limitations Minor ponding will occur at the upstream side of the silt fence resulting in minor localized flooding. Fences which are not constructed on a level contour will be overtopped by concentrated flow resulting in failure of the filter fence. Silt fences subject to areas of concentrated flow (waterways with flows >1 cfs) are not acceptable. Silt fence can interfere with construction operations, therefore planning of access routes onto the site is critical. Silt fence can fail structurally under heavy storm flows, creating maintenance problems and reducing the effectiveness of the system. Maintenance Requirements Inspections should be made on a regular basis, especially after a large storm event, if the fabric becomes clogged, it should be cleaned or if necessary, replaced. Sediment should be removed when it reaches approximately one-half the height of the fence. Petrogulf Corporation Helmer Gulch SWMP 22 Update August 2006 Interceptor Swale Description An interceptor swale is a small v -shaped or parabolic channel which collects runoff and directs it to a desired location. It can either have a natural grass lining or, depending on slope and design velocity, a protective lining of erosion matting, stone or concrete. Primary Use The interceptor can be used either to direct sediment -laden flow from the disturbed areas into a controlled outlet or to direct `clean' runoff around disturbed areas. Since the swale is easy to install during early grading operations, it can serve as the first line of defense in reducing runoff across disturbed areas. As a method of reducing runoff across the disturbed construction area, it reduces the requirements of structural measures to capture sediment from runoff downstream of the disturbed area, runoff can be directed into a sediment basin or protected inlet for sedimentation as opposed to long runs of silt fence, hay bales or other filtration methods. Based on site topography, swales can be effectively used in combination with diversion dikes. Applications Common applications for interceptor swales include roadway projects, site development projects with substantial offsite flow affecting the site and sites with large areas of disturbance. It can be used in conjunction with diversion dikes to intercept flows. Temporary swaies can be used throughout the project to direct flows from staggering areas, storable and fueling areas along with specific areas of construction. Note that runoff which crosses disturbed areas, or is directed in unstable swales, must be routed into a treatment BMIP such as a sediment basin. Grass Tined swales are an effective permanent stabilization technique. The grass effectively filters both sediment and other pollutants while reducing velocity, Design Criteria Maximum depth of flow in the swale shall be 1.5 foot based on 2 -year design storm peak flow. Positive overflow must be provided to accommodate larger storms. Side slopes of the swale shall be 3:1 or flatter. The minimum required channel stabilization for grades less than 2 percent and velocities less than 6 feet per second shall be grass. For grades in excess of 2 percent or velocities exceeding 5 feet per second, stabilization in the form of high velocity erosion control mats, 3" layer of crushed stone or nprap is required. Velocities greater than 12 feet per second will require approval by the local jurisdiction and is discouraged. Check dams can be used to reduce velocities in steep swales. Interceptor swales must be designed for flow capacity based on Manning's Equation to insure a proper channel section. Alternate channel sections may be used when properly designed and accepted. Consideration must be given to the possible outlet. Swales must maintain positive grade to an acceptable outlet. Limitations Petrogulf Corporation Helmer Gulch SWMP 23 Update August 2006 Interceptor swales must be stabilized quickly upon excavation so as not to contribute to 40 the erosion problem they are addressing. Swales may be unsuitable to the site conditions (too flat or steep). Swales are not effective if there is limited flow capacity. Maintenance Requirements Inspection must be made after each significant (0.5" or greater) rain event to locate and repair any damage to the channel or to clear debris or other obstructions so as not to diminish flow capacity. Damages from normal construction activities or storms such as tire ruts, or disturbance of stabilization of the swale, shall be repaired as soon as practical. Perimeter Control Ditch Description This is a ditch, dug about 2'-3' wide and 2'-3' deep. This open ditch is easy to maintain, no fence is needed to install or maintain, the soil is put on the lease side of the ditch. Primary use This method is used to divert water from the pad and before sediment laden water leaves the location/lease. Moving water laden with soil, silt, drops the load in the ditch, removing the velocity of the water and "clean" water rises to the top and exit or infiltrates in the ditch itself. Applications By intercepting runoff before it has a chance to cause erosion, perimeter control ditches are very effective in reducing erosion at a reasonable cost. They are applicable to a large variety of projects including site developments and linear projects such, as roadways. Perimeter control ditches are normally used as perimeter controls for construction sites with large amounts of offsite flow from neighboring properties. Used in combination with swales, the control ditch can be quickly installed with a minimum of equipment and cost. No sediment removal technique is required prior to crossing disturbed areas. Design Criteria The maximum contributing drainage area should be 10 acres or less depending on site conditions. Maximum depth of flow at the dikes shall be 2 feet. The maximum width of the flow at the dikes shall be 20 feet. Side slopes of the diversion dike shall he 3:1 or flatter. Minimum width of the embankment at the top shall be 2 feet. Minimum embankment height shall be 18 inches as measured from the toe of the slope on the upgrade side of the berm. For velocities of less than 6 feet per second, the minimal stabilization for the ditch and adjacent flow areas is grass or erosion control mats. For velocities greater than 6 feet per second, stone stabilization or high velocity erosion control mats should be used. Velocities greater than 12 feet per second must be approved by the local jurisdiction. The ditches shall remain in place until all disturbed areas which are protected by the perimeter ditch are permanently stabilized unless other controls are put into place to protect the site. Petrogulf Corporation Helmer Gulch SWMP 24 Update August 2006 • • • Limitations Filled perimeter control ditches require re -excavation immediately upon re -filling so as not to contribute to the problem they are addressing. The perimeter ditch can he a hindrance to construction equipment moving on the site, therefore their locations must be carefully planned prior to installation. Maintenance Requirements Ditches must he inspected on a regular basis to determine if silt is building up inside the ditch, or if erosion is occurring on the face of the dike. Silt shall be removed in a timely manner. If erosion is occurring on the face of the dike, the slopes of the face shall be stabilized through mulch; either seeding or the slopes of the face shall be reduced. Diversion Dike Description A diversion dike is a compacted soil mound which redirects runoff to a desired location. The dike is typically stabilized with natural grass for low velocities or with stone or erosion control mats for higher velocities. Primary Use The diversion dike is normally used to intercept offsite flow upstream of the construction area and direct the flow around the disturbed soils. it can also be used down stream of the construction area to direct flow into a sediment reduction device such as a sediment basin or protected inlet. The diversion dike serves the same purpose and, based on the topography of the site, can be used in combination with an interceptor swale. Applications By intercepting runoff before it has a chance to cause erosion, diversion dikes are very effective in reducing erosion at a reasonable cost. They are applicable to a large variety of projects including site developments and linear projects such, as roadways and pipeline construction. Diversion dikes are normally used as perimeter controls for construction sites with large amounts of offsite flow from neighboring properties. Used in combination with swales, the diversion dike can be quickly installed with a minimum of equipment and cost, using the swale excavation as the dike. No sediment removal technique is required prior to crossing disturbed areas. Significant savings in structural controls can be realized by using diversion dikes to direct flow to a central area, such as a sediment basin or other sediment reduction structure if the runoff crosses disturbed areas. Design Criteria The maximum contributing drainage area should be 10 acres or less depending on site conditions. Maximum depth of flow at the dikes shall be 1 foot. The maximum width of the flow at the dikes shall be 20 feet. Side slopes of the diversion dike shall he 3:1 or flatter. Minimum width of the embankment at the top shall be 2 feet. Minimum embankment height shall be 18 inches as measured from the toe of the slope on the upgrade side of the berm. Petrogulf Corporation Helmer Gulch SWMP 25 Update August 2006 • For velocities of less than 6 feet per second, the minimal stabilization for the dike and adjacent flow areas is grass or erosion control mats. For velocities greater than 6 feet per second, stone stabilization or high velocity erosion control mats should be used. Velocities greater than 12 feet per second must be approved by the local jurisdiction. The dikes shall remain in place until all disturbed areas which are protected by the dike are permanently stabilized unless other controls are put into place to protect the site. Limitations Compacted earth dikes require stabilization immediately upon placement so as not to contribute to the problem they are addressing. The diversion dike can he a hindrance to construction equipment moving on the site, therefore their locations must be carefully planned prior to installation. Maintenance Requirements Dikes must he inspected on a regular basis to determine if silt is building up behind the dike, or if erosion is occurring on the face of the dike. Silt shall be removed in a timely manner. If erosion is occurring on the face of the dike, the slopes of the face shall be stabilized through mulch; either seeding or the slopes of the face shall be reduced. Vegetation Description Vegetation, as a Best Management Practice, is the sowing of annual grasses, small grains or legumes to provide interim vegetation stabilization for disturbed areas. Primary Use Vegetation is used as a temporary or permanent stabilization technique for areas disturbed by other structures. As a temporary control, vegetation is used to stabilize stockpiles and barren areas which are inactive for long periods. As a permanent control, grass and other vegetation provide for good protection for the soil along with some filtering for overland runoff Subjected to acceptable runoff velocities, vegetation can provide a good method of permanent storm water management as well as a visual amenity to the site. Vegetation can be used in conjunction with other techniques in order to assist in establishment of the vegetation. These other techniques include erosion control, matting, swales and dikes to direct flow around newly seeded areas and proper grading to limit runoff velocities during construction. Applications Vegetation BMPS techniques can and should apply to every construction project with few exceptions, vegetation effectively reduces erosion in swales, stockpiles, berms, mild to medium slopes and along roadways. Vegetation strips can provide some protection used as a perimeter control for utility and site development construction. In many cases, the initial cost of temporary seeding maybe prohibitive for stockpiles or other barren areas subject to erosion yet inactive. This initial cost should be weighed with the amount of time the area is to remain inactive, since maintenance cost for vegetated areas is much less than most structural controls. Petrogulf Corporation Helmer Gulch SWMP 26 Update August 2006 • Design Criteria Surface Preparation Interim or final grading must be completed prior to seeding, minimizing all steep slopes. Install all necessary erosion structures such as dikes, swales, diversions, etc., prior to seeding. Groove or furrow slopes steeper than 3:1 on the contour line before seeding. Seedbed should be well pulverized, loose and uniform. Plant Selection, Fertilization and Seeding Use only high quality, USDA certified seed. Use an appropriate species or species mixture adapted to local climate, soil, conditions and season according to the following table, Consult with the local office of the U.S. Soil Conservation Service (SCS) or Engineering Extension service as necessary for the selection of proper species and application technique in this area. Seeding rate should be in accordance with local land use requirements. Fertilizer shall be applied according to the manufacturer's recommendation with proper spreader equipment. Typical application rate for 10-10-10 grade fertilizer is 700-1000 Ib/acre. DO NOT OVER APPLY FERTILIZER. If hydro seeding is used, do not mix seed and fertilizer more than 30 minutes before application. Evenly apply seed using cyclone seeder, seed drill, or hydro seeder. Provide adequate water to add in establishment of vegetation. Use of appropriate mulching techniques. • Limitations Vegetation is not appropriate for areas subjected to heavy pedestrian or vehicular traffic. • As a temporary technique, vegetation may be costly when compared to other techniques. As an example; -vegetation is not appropriate for rock, gravel or course grained soils. Maintenance Requirements Protect newly seeded areas from excessive runoff and traffic until established. A watering and fertilizing schedule will be required as part of the SWPPP to assist in the establishment of the vegetation. Mulching Description Mulching is a layer of straw or other material which is spread uniformly over barren areas to reduce the effects of erosion from rainfall. Types of mulch include organic materials, straw, wood chips, bark or other fibers, decomposed granite, and gravel. Primary Use Mulch is used to temporarily and/or permanently stabilize clear or freshly seeded areas. It protects the soil from erosion and moisture loss by leasing the effects of wind, water, and sunlight. It also decreases the velocity of sheet flow, thereby reducing the volume of sediment - laden water flow leaving the mulched area. Petrogulf Corporation Helmer Gulch SWMP 27 Update August 2006 • Applications Mulch may be used on any construction -related disturbed area for surface protection including: Freshly seeded or planted areas; areas at risk due to the time being unsuitable for growing vegetation; or areas that are not conducive to seeding or planting. Design Criteria Mulch may be used by itself or in combination with netting or other anchors to promote soil stabilization. Several manufactures provide organic mulch with an attached netting to simplify installation. Installation requirements should adhere to manufacture's specifications and requirements. Choice of mulch depends largely on slope, climate, and soil type in addition to availability of different materials. Straw and hay are the recommended choice due to their availability and biodegradability. Mulch should be applied in an even and uniform mariner where concentrated water flow is negligible. For areas using straw mulch where the slope is greater than 3-5%, anchoring of the mulch is required. Limitations Mulches are subject to removal by wind or water under severe climatic conditions. Mulches lower the soil temperature which may result in longer seed germination periods. Maintenance Requirements Mulched areas must be inspected on a weekly basis, and after significant rainfall, for thin or bare spots caused by natural decomposition or weather related events. Mulch in high traffic areas should be replaced on a regular basis to maintain uniform protection. Straw Bale Dike Description A straw bale dike is a temporary barrier constructed of straw bales anchored with wood or steel posts, which is used to intercept sediment -laden runoff generated by small disturbed areas. The hay bales can serve as both a filtration device and a dam/dike device to treat and redirect flow. Primary Use A straw bale dike is used to trap sediment -laden storm runoff from a small drainage area with relatively level grades, to allow for reduction of velocity thereby causing sediment to settle out. Applications Straw bale dikes are used to treat flow after it leaves a disturbed area on a relatively small (nacre) site. Due to the limited life of the hay bale, it is cost effective for small projects of a short duration. The limited weight and strength of the hay bales makes it suitable for small, flat (<2 percent slope) contributing drainage areas. Due to the problems with the straw degradation and the lack of uniform quality in hay bales, their use is discouraged except for small residential applications. Petrogulf Corporation Helmer Gulch SWMP 28 Update August 2006 • Straw bales can also be used as check dams for small watercourses such as interceptor swales and borrow ditches. Due to the problems in securely anchoring the bales, only small watercourses can effectively use hay bale check dams. Design Criteria Straw bale dikes are to be constructed along a line of constant elevation (along a contour line). Straw bale dikes are suitable only for treating sheet flows across grades of 2% or flatter. Maximum contributing drainage area shall be 0.25 acre per 100 linear feet of dike. Maximum distance of flow to dike shall be 100 feet. Dimensions for individual bales shall be 30 inches minimum length, 18 inches minimum height, 24 inches minimum width and shall weigh no less than 50 pounds when dry. Each straw bale shall be placed into an excavated trench having a depth of 4 inches and a width just wide enough to accommodate the bales themselves. Straw bales shall be installed in such a way that there is no space between bales to allow for any kind of seepage. Individual bales should be held in place by no less than two wood or steel stakes driven a minimum distance of 6 inches into undisturbed ground, with the first stake driven at an angle toward the previously installed bale. The ends of the dike shale be turned upgrade to prevent bypass of storm water. Limitations Due to a short effective life caused by biological decomposition, straw bales must be replaced after a period of no more than 3 months, During the wet and warm seasons, however, they must be replaced more frequently as is determined by frequent inspections. Straw bale dikes are not recommended for use with concentrated flows of any kind except for small flows in which they can serve as a check dam. The effectiveness of straw bales in reducing sediment is very limited. Improperly maintained, straw bales can be a negative impact on the water quality of the runoff. Maintenance Requirements Straw bales shall be replaced if there are signs of degradation, such as straw located down stream from the bales, structural deficiencies due to rotting straw in the bale, or other signs of deterioration. Sediment should be removed from behind the bales when it reaches a depth of approximately 6 inches. If the bales become clogged, they should be replaced immediately. Sediment Basin Description A sediment basin is a pond area with a controlled outlet in which sediment -laden runoff is directed to allow settling of the suspended sediment from the runoff it provides treatment for the runoff as well as detention and controlled release of runoff minimizing flood impacts downstream. Primary Use Sediment basins should be used for all sites with adequate open space to site the basin. For sites with disturbed areas of 10 acres and larger in a common drainage area, sediment Petrogulf Corporation Helmer Gulch SWMP 29 Update August 2006 • basins are required as either temporary or permanent controls unless specific site conditions limit their use. Applications Sediment basins serve as treatment devices which can be used on a variety of project types. it is normally used in site development projects in which large areas of land are available for the basin, a stream or drainage way crosses the site, or a specific water feature is planned for the site. Sediment basins are highly effective when designed for the appropriate storm conditions. it is also reduces maintenance requirements due to the central location of the sediment and minimal structural requirements of the basin. Design Criteria Maximum drainage area contributing to the basin shall be 100 acres. Minimum drainage of the basin shall be 3600 cubic feet per acre of contributing drainage area. Deposited sediment shall be removed when the storage capacity of the basin has been depleted by one-half. Minimum width of the embankment at the top shall be 8 feet. Minimum embankment slope shall be 3:1. Maximum embankment height shall be 6 feet measured from the toe of slope on the downstream side. The basin outlet shall be designed to accommodate a 10 -year design storm without causing damage to the containment structure. tvlinirirum outlet capacity shall be 0.2 Cr per acre of contributing drainage area. The basin must be laid out such that the effective flow length of the basin should beat least twice the effective flow width. Limitations Sediment basins can be rather large depending on site conditions, requiring the use of expensive development area and comprehensive planning for construction phasing prior to implantation. Storm events which exceed the design storm event can cause damage to the spillway structure of the basin. Maintenance Requirements Sediment shall be removed and the basin shall be regraded to its original dimensions at such point where the capacity of the impoundment has been reduced to one-half of its original storage capacity. The removed, sediment shall be stockpiled or redistributed in areas which are protected from erosion. The basin outlet structure and emergency spillway (if present) should be checked frequently and after each major rain event to check for damage and to insure that obstructions are not diminishing the effectiveness of the structures. Sand Bag Berm Description Sandbag berms consist of stacked sandbags installed across a watercourse to direct flow downstream of disturbed areas. There are overflow pipes located in the top of the berm to allow controlled outflow of water after sedimentation has occurred. Petrogulf Corporation Helmer Gulch SWMP 30 Update August 2006 Primary Use A sandbag berm is a temporary sediment control method that addresses the problem of construction in creeks, channels and other watercourses which carry a constant flow and is subjected to high, concentrated flows. A sandbag berm can also be used to create a small sedimentation pond prior to the completion of a permanent detention basin. Sandbag berms can be used as check dams in temporary swales or borrow ditches. Sandbag berms are not suitable for typical perimeter controls where sheet flow is prevalent. Applications During utility or any type of construction in channels or streambeds, sandbag berms can be used as check dams across channels or streambeds, serve as a barrier for utility trenches or even provide a temporary channel crossing for construction equipment without seriously affecting stream conditions. Sandbag berms can also be installed parallel to the road, providing a corridor of sediment control similar to that provided by a silt fence or hay bales, with the exception that a sand bag dike is capable of controlling much higher flows and is much more durable. For site construction, sandbag berms can be used to divert or direct flow or create a temporary sediment basin with the added dimension of being able to be moved to accommodate changes in construction much more easily than compacted earth berms. Design Criteria Dikes are to be constructed along level contours for use as perimeter control devices. Maximum flow through rate shall be 0.1 CFS per square foot of berm surface. Minimum height shall be 18 inches. Minimum width of the berm shall be 18 inches at the top and 48 inches measured at the bottom. • Maximum side berms shall be 2:1. ▪ Sandbags shall consist of polypropylene, polyethylene or polyamide woven fabric with a minimum unit weight of 4 ounces per square yard, a mullen burst strength of 300 -psi minimum and ultraviolet stability exceeding 70 percent, and shall be filled with coarse sand or pea gravel. • 4" diameter SDR -35 or greater PVC pipe segments approximately 24 inches in length shall be used immediately below the top layer of sandbags to allow for overflow of the berm. • For severe velocities or high flows, woven mesh wire can be used to maintain the integrity of the berm. • Sufficient room for the operation of sediment removal equipment shall be provided between the berm and other obstructions in order to properly remove sediment. • The ends of the berm shall be turned upgrade or shall tie into natural grades to prevent bypass of storm water. Limitations Sandbag berms are a costly, labor-intensive technique which is suitable only for areas subjected to high concentrated flows. The permeability of the berms makes it unsuitable for low flow, perimeter conditions. Ponding will occur directly upstream from the berm creating the possibility of a flooding concern which should be considered prior to its placement. For sandbag berms located in high flow areas such as in creeks, the potential for berm damage during high flow increases the requirement for maintenance. Maintenance Requirements Petrogulf Corporation Helmer Gulch SWMP 31 Update August 2006 • • Inspections should be made on a daily basis and after each rain event. The sandbags shall be reshaped or replaced as needed during the inspection. Silt should be removed when it reaches a depth of six (6) inches. In addition, regular inspections should be made on the PVC pipe segments to assure clear flow. Erosion Control Mats Description _ An Erosion Control Mat (ECM) is a geotextile or biodegradable fabric placed over disturbed areas to limit the effects on erosion due to rainfall impact and runoff across barren soil. Erosion control mats are manufactured by a wide variety of vendors addressing a wide variety of conditions such as vegetation establishment and high velocity flow. Types of matting include organic (jute, straw) and synthetic (excelsior and fiberglass) materials. Primary Use Mats can provide both temporary and or permanent stabilization for disturbed soil or barren areas. It is used for areas difficult to stabilize such as steep slopes, temporary or permanent drainage swales, embankments or high traffic (pedestrian) areas. Some mats are reusable, reducing the initial cost of the installation. Applications Mats can be used on any construction -related disturbed area, but are particularly effective for erosion control of fine grained soils, and on short, steep slopes (such as stream banks) where erosion is high and growth of vegetation is slow. Design Criteria A mat may be used by itself or in combination with netting to promote soil stabilization. Choice of matting depends largely on slope, climate, soil type, and durability. Mats are usually installed to the manufacturer's recommended guidelines. After appropriate installation, the matting should be checked for: uniform contact with the soils security of the lap joints; and flushness of the staples with the ground. Manufacturer's information will verify acceptable applications for a particular product. Limitations Although matting is highly effective in controlling erosion, it may be less cost-effective than other BMPs for erosion control and it requires a contractor with considerable mat installation experience. Maintenance Requirements Matted areas must be inspected on a weekly basis, and after significant rainfall, for bare spots caused by weather related events. Missing or loosened matting must be replaced or re - anchored. Pipe Slope Drain Description A pipe slope drain is a temporary pipe line typically utilizing flexible pipe that conveys runoff down unstable slopes. They are anchored on each end with some form of headwall to limit erosion and secure the pipe. Petrogulf Corporation Helmer Gulch SWMP 32 Update August 2006 Primary Use A pipe slope drain is used on sites with a long, unstable slope area which is subject to erosion from overland flow crossing unstable or poorly stabilized sloped areas. It is normally used in combination with, interceptor swales or diversion dikes to direct the flow into the pipe area. The pipe slope drain can provide service for a relatively large area. It does not beat the runoff; therefore, if the runoff contains sediment, treatment through a controlled outlet will be required before the flow is released offsite. Applications Sites with large berms or grade changes such as roadway embankments are candidates for a pipe slope drain. Since provisions must he made to direct the flow into the pipe drain, some grading is normally required upstream of the pipe slope dram. Installed properly, slope erosion can be greatly reduced (but eliminated) using the drain. Pipe slope drains also require a stabilized outlet. This is critical since the velocities at the outfall are normally high. Velocity dissipators as well as stone or concrete riprap are typically required to reduce the velocity and spread the flow, reducing erosion. Flow from a pipe slope drain should be routed to a controlled outlet through interceptor swales, diversion dikes or other suitable methods. Design Criteria The entrance to the pipe slope drain shall be a standard pre -fabricated flared end section with an integral toe plate extending a minimum of 6 inches from the bottom of the end section. The grade of the entrance shall be 3 percent maximum. All sections of the pipe siope drain shall be connected using watertight collars or Basketed watertight fittings. All sediment -laden runoff conveyed by the pipe slope drain shall be directed to sediment trapping facility. Temporary pipe slope drains are to be sized to accommodate runoff flows equivalent to a 10 - year storm as calculated using the Rational Method and Manning's equation, but in no case shall pipes be sized smaller than is shown in the following table: Minimum Pipe Size Maximum Contributing Drainage Area 12" 0.5 Acres 18" 1.5 Acres 21" 2.5 Acres 24" 3.5 Acres 30" 5.0 acres Maximum drainage area for individual pipe slope drains shall be 5 acres. For areas larger than 5 acres, additional drains shall be added. Both the entrance and out fall of the pipe slope drain should be properly stabilized. Grass can normally be used at the entrance, but armor type stabilization, such as stone or concrete riprap is normally used to address the high velocities of the outfall. Petrogulf Corporation Helmer Gulch SWMP 33 Update August 2006 • Limitations Drains must be located away from the construction areas since the drain can easily be damaged by construction traffic. • • Securing the pipe to the slope can be difficult and require significant maintenance during the life of the system. In situations where pipe slope drains convey sediment -laden runoff, pipes can become clogged during large rain, events causing water to overtop the diversion dike thereby creating a serious erosion condition. Grading is normally required upstream of the pipe slope drain in order to direct flow into the system. This can cause additional cost and maintenance. A pipe slope drain reduces erosion but does not prevent it or reduce the amount of sediment runoff. Additional measures should be used in conjunction with the pipe slope drain to treat the flow. Maintenance Requirements Inspection must be made of the pipe after each sufficient (0.5" or greater) rain event to locate and repair any damage to joints or clogging of the pipe. In cases where the diversion dike has deteriorated from around the entrance of the pipe, it may be necessary to reinforce the dike with sandbags or to install a concrete collar to prevent failure. Signs of erosion around the pipe drain should be addressed in a timely manner by stabilizing the area with erosion control mats, crushed stone, concrete or other acceptable methods. Petrogulf Corporation Helmer Gulch SWMP 34 Update August 2006 • • Appendix C BMP Details & Diagrams Petrogulf Corporation Helmer Gulch SWMP 35 Update August 2006 • • Silt Fence SE -1 Description and Purpose A silt fence is made of a filter fabric that has been entrenched, attached to supporting poles, and sometires backed by a plastic or wire mesh for support. The silt fence detains sediment -laden water, promoting sedimentation behind the fence. Suitable Applications Silt fences are suitable for perimeter control, placed below areas where sheet flows discharge from the site. They should also be used as interior controls below disturbed areas where runoff may occur in the form of sheet and rill erosion. Silt fences are generally ineffective in locations where the flow is concentrated and are only applicable for sheet or overland flows. Silt fences are most effective when used in combination with erosion controls. Suitable applications include: • Along the perimeter of a project. • Below the toe or down slope of exposed and erodible slopes. • Along streams and clic-nnels. • Around temporary spoil areas and stockpiles. • Below other small cleared areas. Limitations a Do not use in streams, channels, drain inlets, or anywhere flow is concentrated. Objectives EC Erosion Control SE Sediment Control TR Tracking Control WE Wind Erosion Control NS Non -Star torn water Management Control Waste Management and Materials Pollution Control Legend: Primary Objective El Secondary Objeclive Targeted Constituents Sediment Nutrients Trash Metals Bacteria Oil and Grease Organics Potential Alternatives SE -5 RberRolls SE -6 Gravel Bag Berm SE -8 Sandbag Barrier SE -9 Straw Bale Barrier C,‘ SWATER �. ..'.Lir`. v=7. -: .i... • January 2003 California Stormwater BMP Handbook Construction www.cabmphandbooks.com 1 of 8 Silt Fence SE -1 • Provide sufficient room for runoff to pond behind the fence and to allow sediment removal equipment to pass between the silt fence and toes ofslopes or other obstructions. About 1200 f 2 of ponding area should be provided for every acre draining to the fence. • Turn the ends of the filter fence uphill to prevent stormwater from flowing around the fence. ■ .Leave an undisturbed or stabilized area immediately down slope from the fence where feasible. • Silt fences should remain in place until the disturbed area is permanently stabilized. Design and Layout Selection of a filter fabric is based an soil conditions at the construction site (which affect the equivalent opening size (EOS) fabric specification) and characteristics of the support fence (which affect the choice of tensile strength). The designer should specify a filter fabric that retains the soil found on the construction site yet that it has openings large enough to permit drainage and prevent clogging. The following criteria is recommended for selection of the equivalent opening size: 1. If 50 percent or less of the soil, by weight, will pass the U.S. Standard Sieve No. 200, select the EOS to retain 85 % of the soil. The EOS should not be finer than EOS 70. 2. For all other soil types, the EOS should be no larger than the openings in the U.S. Standard Sieve No. 70 except where direct discharge to a stream, lake, or wetland will occur, then the EOS should be no larger than Standard Sieve No. 100. To reduce the chance of clogging it is preferable to specify a fabric with openings as large as allowed by the criteria. No fabric should be specified with an EOS smaller than U.S. Standard Sieve No. 100. If 85% or more of a soil, by weight, passes through the openings in a No. 200 sieve, filter fabric should not be used. Most o f the particles in such a soil would not be retained if the EOS was too large and they would clog the fabric quickly if the EOS were small enough to capture the soil. The fence should be supported by a plastic or wire mesh if the fabric selected does not have sufficient strength and bursting strength characteristics for the planned application (as recomro.ended by the fabric manufacturer). Filter fabric material should contain ultraviolet inhibitors and stabilizers to provide a minimum of six months of expected usable construction life at a temperature range of o °F to 120 °F. ■ Layout in accordance with attached figures. ■ For slopes steeper than 1(H: V) and that contain a high number of ro cks or large dirt clods that tend to dislodge, it may be necessary to install additional protection immediately adjacent to the bottom of the slope, prior to installing silt fence. Additional protection may be a chain link fence or a cable fence. • For slopes adjacent to sensitive receiving waters or Environmentally Sensitive Areas (ESAs), silt fence should be used in conjunction with erosion control BMPs. January 2003 California Stiorrnwater BMP Handbook Sof 8 Co nstructio n www.ca brrrpha nd books= rn Silt Fence SE -1 • Construct the length of each reach so that the change in base elevation along the reach does not exceed 1/3 the height of the barrier; in no case should the reach exceed 500 ft. Costs • Average annual cost for installation and maintenance (assumes 6 month useful life). 37 per lineal foot ($85o per drainage acre). Range of cost is $3.5a - $9.10 per lineal foot. Inspection and Maintenance • Inspect BIvIPs prior to forecast rain, daily during extended rain events, after rain events, weekly Burl g the rainy season, and at two-week intervals during the non -rainy season. ■ Repair undercut silt fences. ▪ RepaiT or replace split, torn, slumping, or weathered fabric. The lifespan of silt fence fabric is generally 5 to 8 months. • Silt fences that are damaged and become unsuitable for the intended purpose should be removed from the site of work, disposed of, and replaced with new silt fence barriers. • Sediment that accumulates in the BMP must be periodically removed in order to maintain BMP effectiveness. Sediment should be removed when the sediment accumulation reaches one-third of the barrier height. Sediment removed during maintenance may be incorporated into earthwork on the site or disposed at an appropriate location. • Silt fences should be left in place until the upstream area is permanently stabilized. Until then, the silt fence must be inspected and maintained. • Holes, depressions, or other ground disturbance caused by the removal of the silt fences should be backfilled and repaired. References Manual of Standards of Erosion and Sediment Control Measures, Association of Bay Area Governments, May 1995. National Management Measures to Control Nonpoint Source Pollution from Urban Areas, United States Environmental Protection Agency, 2002. Proposed Guidance Specif}Ting IvTanagement Measures for Sources of Nonpoint Pollution in Coastal Waters, Work Group -Working Paper, IJSEPA, April 1992. Sedimentation and Erosion Control Practices, and Inventory of Current Practices (Draft), UESPA, 1990. Southeastern Wisconsin Regional Planning Commission (SWRPC). Costs of Urban Nonpoint Source Water Pollution Control Measures. Technical Report No. 31. Southeastern Wisconsin Regional Planning Commission, Waukesha, WI. 1991 Stormwater Quality Handbooks - Construction Site Best Management Practices (BMPs) Manual, State of California Department ofTransportation (Caltrans), November 2000. January 2003 California Stormwater BMP Handbook Sof 8 Construction www.ca bmpha nd b©oks.go m Silt Fence SE -1 a ) January 2003 California S2rmw mrBMP Handbook 7 Of 8 Construction www.2bm«an books.com Sediment Basin SE -2 Description and Purpose A sediment basin is a temporary basun folwed by excavation or by cojnsll LLct an embankment so that sediment -lad en runoff is temporarily detained under quiescent conditions, allowing sediment to settle out before the runoff is discharged. Suitable Applications Sediment basins may be suitable for use on larger projects with sufficient space for constructing the basin. Sediment basins should be considered for use: ▪ Where sediment -laden water may enter the drainage system or watercourses • On construction projects with disturbed areas during the rainy season • At the outlet of disturbed watersheds between 5 acres and 75 acres • At the outlet of large disturbed watersheds, as necessary • Where post construction detention basics are required ■ In association with dikes, temporary channels, and pipes used to convey runoff from disturbed areas Limitations Sediment basins must be installed only within the property limits and where failure of the structure will not result in loss of life, damage to homes or buildings, or interruption of use or service of Objectives EC SE TR WE NS Erosion Control S edment Control Tracking Control Wind Erosion Control N on-Stormweter Management Control Waste Management and Materials Pollution Control Legend: • Pri mary Objective • Secondary Objective Targeted Constituents Sediment Nutrients Trash Metals Bacteria Oil and Grease Organics Potential Alternatives SE -3 Sediment Trap (far smaller areas) t Sri :FIVI ,"4vd January 2003 California Storrnwater BMP Handbook Errata 9-04 Construction www.cabmphandbooks.com 1 of 12 Sediment Basin SE -2 temporary seeding, mulching, diversion dikes, etc., to reduce the amount of sediment flowing into the basin. Pdruxni-ng To improve the effectiveness of the basin, it should be located to intercept runoff from the largest possible amount of disturbed area. The best locations are generally low areas. Drainage into the basin can be improved by the use of earth dikes and drainage swales (see BMP EC -g). The basin must not be located in a stream but it should be located to trap sediment -laden runoff before it enters the stream. The basin should not be located where its failure would result in the loss oflife or interruption of the use or service of public utilities or roads.. ■ Construct before clearing and grading work begins when feasible. • Do not locate in a stream. • Basin sites should be located where failure of the structure will not cause loss of life, damage to homes or buildings, or interruption ofuse or service of public roads or utilities. s Large basins are subject to state and local dam safety requirements. ■ Limit the contributing area to the sediment basin to only the runoff from the disturbed soil areas. L se temporary concentrated flow conveyance controls to divert runoff from undisturbed areas away from the sediment basin. ✓ The basin should be located: (1) by excavating a suitable area or where a low embankment can be constructed across a Swale, (2) where post -construction (permanent) detention basins will be constructed, and (3) where the basins can be maintained on a year-round basis to provide access for maintenance, including sediment removal and sediment stockpiling in a protected area, and to maintain the basin to provide the required capacity. Design Sediment basins must be designed in accordance with Section A of the State of California NPDES General Permit for Stormwater Discharges Associated with Construction Activities (General Permit) where sediment basins are the only control measure proposed for the site. If there is insufficient area to construct a sediment basin in. accordance with the General Permit requirements, then the alternate design standards specified herein may be used, Sediment basins designed per the General Permit shall be designed as follows: Option 2: Pursuant to local ordinance for sediment basin design and maintenance, provided that the design efficiency is as protective or mare protective of water quality than Option 3. OR Option 2: Sediment basin(s), as measured from the bottom of the basin to the principal outlet, shall have at least a capacity equivalent to 3,600 cubic feet (133 yd3) of storage per acre draining into the sediment basin. The length of the basin shall be more than twice the width of the basin. The January 2003 California Sbarmwater BMP Handbook Errata 9-04 Construction www.cabmphandbooks.00m 3 of 12 Sediment Basin SE -2 Other design considerations are: The volume of the settling zone should be sized to capture runoff from a 2 -year storm or other appropriate design storms specified by the local agency. A detention time of 24 to 40 hours should allow 70 to 80 % of sediment to settle. ■ The basin volume consists of two zones: - A sediment storage zone at least x ft deep. - A settling zone at least 2 ft deep. • The Length to settling depth ratio (L/SD) should be less than 200. • Sediment basins are best used in conjunction with erosion controls. Sediment basins that will be used as the only means of treatment, without upstream erosion and sediment controls, must be designed according to the four options required by the General Permit (see Options 1-4 above). Sediment basins that are used in conjunction with upstream erosion and sediment controls should be designed to have a capacity equivalent to 67 yd3 of sediment storage per acre of contributory area. ▪ The lengtth of the basin should be more than twice the width of the basin; the length. should be determined by measuring the distance between the inlet and the outlet. a The depth must be no less tha ri 3 it. • Basi r s with an impoumding levee greater thA rz 4 5 ft tall, measured from the lowest point to the impounding area to the highest point of the levee, and basins capable of impounding more than 35,000 ft3, should be designed by a Registered Civil Engineer. The design should include maintenance requirements, including sediment and vegetation removal, to ensure continuous function of the basin outlet and bypass structures. • Basins should be designed to drain within 72 hours following storm events. If a basin fails to drain within 72 hours, it must be pumped dry. R Sediment basins, regardless of size and storage volume, should include features to accommodate overflow or bypass flows that exceed the design storm event. Include an emergency spillway to accommodate flows not carried by the principal spillway. The spillway should consist of an open channel (earthen or vegetated) over undisturbed material (not fill) or constructed of a non -erodible riprap. The spillway control section, which is a level portion of the spillway channel at the highest elevation in the channel, should be a minimum of 20 it in length. ■ Rock or vegetation should be used to protect the basin inlet and slopes against erosion. ■ A forebay, constructed upstream oft -he basin maybe provided to remove debris and larger p articles. January 2003 Caiifornia Stormwater BNIP Handbook Errata 9-04 Construction www.cabrmphandbooks.00m 5 of 12 • Sediment Basin SE -2 g = gravity (32.2 ft/s2) H = elevation when the basin is frill (ft) Ho = final elevation when basin is empty (ft) With a drawdown time of 40 hours, the equation becomes: — C (1.75 x1 )A(H Hcy) ° - Flow Control Using Multiple Orifcces (see Figure2): _ 33--2A(J1m) 360OCT (2g[1'lsn. kentrwdajartjicesDd.i (Eq. 3) (Eq. 4) With terms as described above except: at = total area of orifices lamaz = maximum height from lowest orifice to the maximum water surface (ft) hcentroid ofori&ices = height from the lowest orifice to the centroid of the orifice configuration (ft) Allocate the orifices evenly on two rows; separate the holes by 3x hole diameter vertically, and by 120 degrees horizontally (refer to Figure 2). Because basins are notmaintained for infiltration, water loss by infiltration should be disregarded when designing the hydraulic capacity of the outlet structure. Care must be taken in the selection of "C"; 0.60 is most often recommended and used. However, based on actual tests, GKY (1989), "Outlet Hydraulics of Extended Detention Facilities for Northern Virginia Planning District Commission", recommends the following: C = 0.66 for thin materials; where the thickness is equal to or less than the orifice diameter, or C = 0.8o when the material is thicker than the orifice diameter Installation ■ Securely anchor and install ari anti -seep collar on the outlet pipe/riser and provide an emergency spillway for passing major floods (see Local flood control agency). ■ Areas under embankments must be cleared and stripped of vegetation. • Chain link fencing should be provided around each sediment basin to prevent unauthorized entry to the basin or if safety is a concern. January 2003 California Stormwater BMP Handbook Errata 9-04 Construction www.cabmphandbooks.com 7 of 12 Sediment Basin SE -2 Manual of Standards of Erosion. and Sediment Control Measures, Association of Bay Area Governments, May 1995. McLean, J., noon. Mosquitoes in Constructed Wetlands: A Management Bugaboo? In T.R. Schueler and H.K. Holland [eds.], The Practice of Watershed Protection. pp. 29-33. Center for Watershed Protection, Ellicott City, MD, 2000. Metzger, M.E., D. F. Messer, C. L. Beitia, C. M. Myers, and V. L. Kramer. The dark site of stormwater runoff management: disease vectors associated with structural BMPs, 2002. National Management Measures to Control Nonpoint Source Pollution from Urban Areas, United States Environmental Protection Agency, 2002. Proposed Guidance Specifying Management Measures for Sources ofNonpoint Pollution in Coastal Water, Work Group -Working Paper, USEPA, April 1992. Stor_•.rwater Quality Handbooks - Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), November 2000. Storm.water Management of the Puget Sound Basin, Technical Manual, Publication #91-75, Washington. State Department of Ecology, February 1992. U.S. Environmental Protection Agency (TJSEPA). Guidance Specifying Management Measures for Nonpoint Pollution in Coastal Waters. EPA. 840-B-9-002. U.S. Environmental Protection Agency, Office of Water, Washington, DC, 3.993 Water Quality Management Plan for the Lake Tahoe Region, Volume II HAndbook of Management Practices, Tahoe Regional Planning Agency, November 1988. January 2003 California Stsrrmwater BMA Handbook Errata 9-04 Construction www.cabmphandbooks.com Sof 12 • • Sediment Basin SE -2 Stabilized �— inlet f - inflow Embankment Side slopes X3:1 (H: V) �IMax 1 Outlet protection Settling depth 24" Min depth Sediment storage depth — 12" Min Riser w/ hood & trash rack D Riser encased in grovel jacket. Upper two—thirds Anti—seep perforated. ` collars Anti—floatation block i TOP VIEW Emergency spillway Emergency spillway T 12" L Stabilized Outlet See EC -10 SIDE VIEW FIGURE 2: TYPICAL TEVIPCRARY SEDIMENT BASIN \AULTPLE 07<IEICE DESIGN NOT TO SCALE January 2003 California Sbormwater BMP Handbook Errata 9-04 Construction www.cabrriphandbooks.com 11 of 12 Sediment Trap SE -3 Description and Purpose A sediment trap is a containment area where sediment -Jaden runoff is temporarily detained under quiescent conditions, allowing sediment to settle out or before the runoffis discharged. Sediment traps are formed by excavating or constructing an earthen embank menu across a waterway or low drainage area. Suitable Applications Sediment traps should be considered for use: • At the perimeter of the site at locations where secliirient laden runoff is disrhsrged offsite. • At multiple locations within the project site where sediment control is needed. • Around or upslope from storm drain inlet protection measures. ▪ Sediment traps may be used on construction projects where the drainage area is less than 5 acres. Traps would be placed where sediment -laden stormwater may enter a storm drain or watercourse. SE -2, Seciirnent Basins, must be used for drainage areas greater than, 5 acres, • As a supplemental control, sediment traps provide additional protection for awater body or for reducing sediment before it enters a drainage system. Objectives EC SE TR WE NS WM Erosion Control Sediment Control Tracking Control Wind Erosion Control Non-Stormwater Management Control Waste Management and Materials Pollution Control Legend: Q Primary Objective ® Secondary Objective Targeted Constituents Sediment Nutrients Trash Metals Bacteria 011 and Grease Organics Potential Alternatives SE -2 Sediment Basin (for larger areas) i . :. Irea., 177Rk^ r r7I7: January 2003 California Stormwater BMP Handbook Construction www.cabmphandbooks.cam 1of 6 Sediment Trap SE -3 ■ Locate sediment traps as near as practical to areas producing the sediment Trap should be situated according to the following criteria (1) by excavating a suitable area or where a low embankment can be constructed across a swale, (2) where failure would not cause loss of life or property damage, and (3) to provide access for maintenance, including sediment removal and sediment stockpiling in a protected area ■ Trap should be sized to accommodate a settling zone and sediment storage zone with recommended minimum volumes of 67 yds/acre and 33 yd3/acre of contributing drainage area, respectively, based on o.5 in, of runoff voliim e over a 24-hour period. In many cases, the size of an individual trap is limited by available space. Multiple traps or additional volume niay be required to accommodate specific rainfall, soil, and site conditions. • Traps with an impounding levee greater than 4 5 it tall, measured firom the lowest point to the impounding area to the highest point of the levee, and traps capable of impounding more than 35,000 fra, should be designed by a Registered Civil Engineer. The design should include maintenance requirements, including sediment and vegetation removal, to ensure continuous function of the trap outlet and bypass structures. • The outlet pipe or open spillway must be designed to convey anticipated peak flows. • Use rock or vegetation to protect the trap outlets aga int erosion. • Fencing should be provided to prevent unauthorized entry. Installation Sediment traps can be constructed by excavating a depression in the ground or creating an impoundment with a small embankment. Sediment traps should be installed outside the area being graded and should be built prior to the start of the grading activities or removal of vegetation. To minimize the area disturbed by them, sediment traps should be installed in natural depressions or in small swales or drainage ways. The following steps must be followed during installation: • The area under the embankment must be cleared, grubbed, and stripped of any vegetation and root mat The pool area should be cleared. • The fill material for the embankment must be free of roots or other woody vegetation as well as oversized stones, rocks, organic material, or other objectionable material. The embarrinnent may be compacted by traversing with equipment while it is being constructed. • All cut -and -fill slopes should be 3:1 or flatter. • When a riser is used, all pipe joints must be watertight. • When a riser is used, at least the top two-thirds of the riser should be perforated with 0,5 in. diameter holes spaced 8 in. vertically and 10 to 12 in. horizontally. See SE -2, Sediment Basin • When an earth or stone outlet is used, the outlet crest elevation should be at least 1 ft below the top of the embankment. January 2003 California Storm water BMP Handbook 3 of 6 Construe -lion www.cabmphandbooks.corn • Sediment Trap SE -3 National Management Measures to Control Nonpoint Source Pollution from Urban Areas, United States Environmental Protection Agency, 2002. Proposed Guidance Specifying Management Measures for Sources of Nonpoint Pollution in Coastal Waters, Work Group -Working Paper, USEPA, Apri.11992. Stormwater Quality Handbooks - Construction Site Best Management Practices CBMPs) Manual, State of California Department of Transportation (Caltrans), November 2000. Stormwater Management Manual for The Puget Sound Basin, Washington State Department of Ecoloff, Public Review Draft, 1991. U.S, E12\61011n1 ental Protection Agency (USEPA). Guidance Specifying Management Measures for Nonpoint Pollution in Coastal Waters. EPA 840-B-9-002. U.S. Environmental Protection Agency, Office of Water, Washington, DC, 1993. Water Quality Management Plan for the Lake Tahoe Region, Volume II, Handbook of Management Practices, Tahoe Regional Planning Agency, November 1988. Januar,' 2003 California Storrnwater BMP Handbook Sof 6 Co astruction www.cabmohandbooks.com Check Dams SE -4 Description and Purpose A check dam is a small barrier constructed of rock, gravel bags, sandbags, fiber rolls, or reusable products, placed across a constructed swale or drainage ditch. Check dams reduce the effective slope of the channel, thereby reducing the velocity of flowing water, allowing sediment to settle and reducing erosion. Suitable Applications Check dams may be appropriate in the following situations: • To promote sedimentation behind the dam. • To prevent erosion by reducing the velocity of channel flow in small intermittent channels and temporary swages. ■ In small open channels that drain. 10 acres or less. ■ In steep channels where stormwater runoff velocities exceed. 5 ft/s. • During the establishment of grass linings in drainage ditches or channels. • In temporary ditches where the short length of service does not warrant establishment of erosion -resistant linings Lim itations ■ Not to be used in live streams or in channels with extended base flows. Objectives EC SE TR WE NS Erosion Control Sediment Control Tracking Control Wind Erosion Control Non-Stormuvater Management Control Waste Management and Materials Pollution Control Legend: El Primary Objective g Secondary Objective Targeted Constituents Segment Nutrients Trash Metals Bacteria Oil and Grease Organics 0 Potential Alternatives SE -5 f=iber Roils SE -6 Gravel Bag Berm SE -8 Sandbag Barrier January 2.003 California Stormwater BMP Handbook Construction www.cabmphandbooks.com i of 5 Check Dams SE -4 or swale to prevent washout. The rock used must be large enough to stay in place given the expected design flow through the channel. Log check dams are usually constructed of 4 to 6 m. diameter logs. The logs should be embedded into the soil at least i8 in. Logs can be bolted or wired to vertical support logs thAt have been driven or buried into the soil. Gravel bag and sandbag check dams are constructed by stacking bags across the ditch or swale, shaped as shown in the drawings at the end of this fact sheet. Manufactured products should be installed in accordance with the manufacturer's instructions. If grass is planted to stabili7e the ditch or swale, the check dam should be removed when the grass has matured (unless the slope ofthe swales is greater than 4%). The following guidance should be followed for the design and layout of check dams: ▪ Install the first check dam approximately 16 ft from the outfall device and at regular intervals based on slope gradient and soil type. ■ Check dams should be placed at a distance and height to allow small pools to form between each check dam. ■ Backwater from a downstream check dam should reach the toes ofthe upstream check dam. ■ A sedirnent trap provided immediately upstream ofthe check dam will help capture sediment. Due to the potential for this sediment to be resuspended in subsequent storms, the sediment trap must be cleaned following each storm event. ■ High flows (typically a 2 -year storm or larger) should safely flow over the check dam without an increase in upstream flooding or damage to the check dant. ▪ Where grass is used to line ditches, check darns should be removed when grass has matured sufficiently to protect the ditch or swale. a Gravel bags may be used as check dams withthe following specifications: Materials Gravel bags used for check dams should conform to the requirements of SE -6, Gravel Bag Berms. Sandbags used for check dams should conform to SE --8, Sandbag Barrier. Fiber rolls used for check dams should conform to SE -5, Fiber Rolls. Straw bales used for check darns should conform to SE -9, Straw Bale Barrier. Installation ■ Rock should be placed individually by hand or by mechanical methods (no dvnnping of rock) to achieve complete ditch or swale coverage. ■ Tightly abut bags and stack according to detail shown in the figure at the end of this section. Gravel bags and sandbags should not be stacked any higher than 3 ft, a Fiber rolls and straw bales must be trenched in and firmly staked in place. January 2003 California Stnrmwater BMP Handbook Sof 5 Construction www.cabmphandbooks.com Check Dams SE -4 1.5 ft min 8" to 12" diameter rock Flow ELEVATION (N(443 14010 x 04_ TYPICAL 00<. CHECK DAv SECTION 00-< CHECK DAM NOT TO SCALE GAVEL 3AG 0 E0< DAN' NOT TO SCALE ELEVATION e) ox 0 January 2003 California Stormwater BMP Handbook Sof 5 Construction www.cabmphandbooks.com Fiber Rolls SE -5 Description and Purpose A fiber roll consists of straw, flax, or other similar materials bound into a tight tubular roll. When fiber rolls are placed at the toe and on the face of slopes, they intercept runof reduce its flow velocity, release the runoff as sheet flow, and provide removal of sediment from the runoff. By interrupting the length of a slope, fiber rolls can also reduce erosion. Suitable Applications Fiber rolls may be suitable: ■ Along the toe, top, face, and at grade breaks of exposed and erodible slopes to shorten slope length and spread runoff as sheet flow ■ At the end of a downward slope where it transitions to a steeper slope �. Along the perimeter of a project • As check dares in»nlined ditches a Down-slope of exposed soil areas • Around temporary stockpiles Limitations • Fiber rolls are not effective unless trenched Obj ectives EC Erosion Control SE Sediment Control TR Tracking Control WE Wind Erosion Control NS Non-Stormwater Management Control Waste Management and WM Materials Pollution Control Legend: [r Primary Objective Q. Secondary Objective Targeted Constituents Sediment Nutrients Trash Metals Bacteria Oil and Grease Organics Potential Alternatives SE -1 Silt Fence SE -6 Gravel Bag Berm SE -8 Sandbag Barrier SE -9 Straw Bale Barrier .1Fri7; r'--maVrX.:rFR January 2003 Caiifornfa Srnrmwater BMP Handbook Co nstr-u ction www.cabmphandbooks.corn 1 of 4 Fiber Rolls SE -5 • If fiber rolls are removed, collect and dispose of sediment accumulation, and fill and compact holes, trenches, depressions or any other ground disturbance to blend with adjacent ground. Costs Material costs for fiber rolls range from $20 - $30 per 25 It roll. Inspection and Maintenance • Inspect BMPs prior to forecast rain, daily d-uring extended rain events, after rain events, weekly during the rainy season, and at two-week intervals during the non -rainy season. • Repair or replace split torn, unraveling, or slumping fiber rolls. • If the fiber roll is used as a sediment capture device, or as an erosion control device to maintain sheet flows, sediment that accumulates in the BMP must be periodically removed in order to maintain. BMP effectiveness. Sediment should be removed when sediment accumulation reaches one-half the designated sediment storage depth, usually one-half the distance between the top of the fiber roll and the adjacent ground surface. Sediment removed during nininten.ance may be incorporated into earthwork on the site of disposed at an appropriate location. • If fiber rolls are used for erosion control, such as in a mini check dam, sediment reraoval should not be required as long as the system continues to control the grade. Sediment control BMPs will likely be required in conjunction with this type of application. References Stormwater Quality Handbooks - Construction Site Best IVIanAgement Practices (BMPs) Manual, State of California Department o f Transportation (Caltrans), November 2000. January 2003 California Storrnwater 1311P Handbook 3 of 4 Construction merw.cabmphandbooks. CO M Gravel Bag Berm SE -6 Description and Purpose A gravel bog berm is a series of gravel -filled bags placed on a level contour to intercept sheet flows. Gravel bags pond sheet flow runoff, allowing sediment to settle out, and release runoff slowly as sheet lows, preventing erosion. Suitable Applications Gravel bag beans may be suitable: • As a linear sediment control measure: Below the toe of slopes and erodible slopes As sediment traps at culvert/pipe outlets Below other small cleared areas Along the perimeter of a site - Down slope of exposed soil areas - Around temporary stockpiles and spoil areas - Parallel to a roadway to keep sediment off paved areas - Along streams and channels • As linear erosion control measure: Objectives EC Erosion Control SE Sediment Control TR Tracking Control WE Wind Erosion Control NS Non-Stormwater Management Control Waste Management and WM Materials Pollution Control Legend: El Primary Objective Secondary Objective Targeted Constituents Sediment Nutrients Trash Metals Bacterid Oil and Grease Organics Potential Alternatives SE -1 Sift Fence SE -5 Fiber Roll SE -8 Sandbag Barrier SE -9 Straw Bale Barrier January 2003 California Strmwater BMP Handbook Construction www.cabmphandbooks.com 1 of 4 Gravel Bag Berm SE -6 • For installation near the toe of the slope, consider moving the gravel bag barriers away from the slope toe to facilitate cleaning. To prevent flows behind the barrier, bags can be placed perpendicular to a berm to serve as cross barriers. • Drainage area should not exceed 5 acres. • In Non -Traffic Areas: - Height = 1.8 in. maximum - Top width = 24 in. minimum for three or more layer construction. Top width = 12 in. minimum for one or two layer construction - Side slopes = 2:1 or flatter • In Construction. Traffic Areas: - Height = 1? ill, maximum - Top width = 24 in. minimum for three or more layer construction. - Top width = 12 in. mirimuna for one or two layer construction, - Side slopes = 2:1 or flatter. • Butt ends of bags tightly s On multiple row, or multiple layer construction, overlapp butt joints of adjacent row and row beneath. • Use a pyramid approach when stacking bags. Materials • Bag Material: Bags should be woven polypropylene, polyethylene or polyamide fabric or burlap, nninirrtrrrn unit weight of 4 oarnces/yd2, Mullen burst strength exceeding 300 lb fine in conformance with the requirements in ASTM designation D3786, and ultraviolet stability exceed" g 70% in conformance with the requirements in ASTM designation D4355. • Bag Size: Each gravel -filled bag should have a length of i8 in., width of 12 in., thickness of 3 in., and mass of approximately 33 lbs. Bag dimensions are nominal, and may vary based on locally available materials. • Fill Material: Fill material should be 0.5 to 1 in. Class 2 aggregate base, clean and free from clay, organic matter, and other deleterious material, or other suitable open graded, non -cohesive, porous gravel. Costs Gravel filter: Expensive, since off-site materials, hand construction, and demolition/removal are usually required. Material costs for gravel bags are average of $2..50 per empty gravel bag. Gravel costs range from $2o-$35 per yd3. January 2003 California Stormwater BM P Handbook 3 of 4 Construction www.cabmphandbooks.cam Straw Bale Barrier SE -9 Description and Purpose A straw bale barrier is a series of straw bales placed on a level contour to intercept sheet flows. Straw bale barriers pond sheet- flow runoff, allowing sediment to settle out. Suitable Applications Straw bale barriers may be suitable: s As a linear sediment control measure: - Below the toe of slopes and erodible slopes - As sediment traps at culvert/pipe outlets - Below other small cleared. areas Along the perimeter of a site Down slope of exposed soil areas - Around temporary stockpiles and spoil areas Parallel to a roadway to keep sediment off paved areas - Along streams and channels As lin ear erosion control measure: - Along the face and at grade breaks of exposed and erodible slopes to shorten slope length and spread runoff as sheet flow Objectives EC Erosion Control EI SE S ediment Canto] TR Tracking Control WE Wind Erosion Control Non-Stormwater NS Management Control Waste Management and Val Matenais Pollution Con Legend: El' Primary Objective El Secondary Objective Targeted Constituents Sediment Nutrients Trash Metals Bacteria Oil and Grease Organics 1,Z Potential Alternatives SE -1 Silt Fence SE -5 Fiber R oils SE -6 Gravel Bag Berm SE -8 Sandbag Barrier : NH *VriYvATI-X January 2003 California Storrnwater BMP Handbook Construction www.ca bmphandbooks. rn of 6 Straw Bale Barrier SE -9 E Turn the ends of the straw bale barrier up slope to prevent runoff from going around the barrier. ▪ Allow sufficient space up slope from the barrier to allow ponding and to provide room for sediment storage. • - For installation near the toe of the slope, consider moving the barrier away from the slope toe to facilitate cleaning. To prevent low behind the barrier, sand bags can be placed perpendicular to the barrier to serve as cross barriers. ■ Drainage area should not exceed 1 acre, or 0.25 acre per 10O ft of barrier. • Maximum flow path to the barrier should be limited to 100 ft. = Straw bale barriers should consist of two parallel rows. - Butt ends ofbales tightly - Stagger butt joints between front and back row - Each row ofbales must be trenched in and fimaly staked • ,Straw bale barriers are lirnited in height to one bale laid on its side. • _anchor bales with either two wood stakes or four bars driven through the bale and into the soil. Drive the first stake towards the buttjoint with the adjacent bale to force the bales together. • See attached figure for installation details. Matericdls ■ St;-aw'Bale Size: Each straw bale should be a minimum of s4 in wide, iS in. in height, 36 in. in length and should have a rninimilrn mass of 50 lbs. The straw bale should be composed entirely of vegetative matter, except for the binding material. ■ Bale Bindings: Bales should be bound by steel wire, nylon or polypropylene string placed horizontally. Jute and cotton binding should not be used. Baling wire should be a minimum diameter of a.4 gauge. Nylon or polypropylene string should be approximately 12 gauge in diameter with a breaking strength of 80 Is force. ▪ Stakes: Wood stakes should be commercial quality lumber of the size and shape shown on the plans. Each stake should be free from decay, splits or cracks longer than the thickness of the stake, or other defects that would weaken the stakes and cause the stakes to be structurally unsuitable. Steel bar reinforcement should be equal to a *4 designation or greater. End protection should be provided for any exposed bar reinforcement. Costs Straw bales cost $, - $7 each.. Adequate labor should be budgeted for installation and maintenance. January 2003 California Stormwater BNWP Handbook Sof 5 Construction www.cabmphandbooks.com Straw Bale Barrier SE -9 aaos STRAW BALE BARRIER 0 a 0 1 4 Q El r N O P _0_,c, . ni rnin w E o V2� 01 U u C u u t- K G C V CI u\ar .o rr „� a C d y® 2 N ° c c - r cc o a ° o m c e m H uv m- v �d . u u E m o pu 0 Eto c '2 ugn �~dG Y L Eupntia -FSmmacC 22 g O L N V OP C •° .YQ. E— T .G O w }. 4 aQ V U Cy C 8 6J CTC g> g 0 C 9 O 0 C a u 0, m 0 n° E p a aL m c6 ° t � o 8+c `ur aa o � a u uy� c w" e u ''• a- °` `7 m a ° r a. — �N 43 C U u CO C O C 7 a C C 0 3 S 1,- 4 N b W 5 0 fA 6 W1 .- Ni N7 v 4 u6 r W W January 2003 California Stormwater BMP Handbook Sof 6 Construction www.cabmphandbooks.com Wind Erosion Control WE -1 Objectives EC SE TC WE NS Erosion Control Sediment Control Tracking Control Wind Erosion Control Non-Stormuater Managenent Control Waste Management and Materials Pollution Control Legend: El Primary Objective Secondary Objective Targeted Constituents Description and Purpose Sediment Wind erosion or dust control consists of applying water or other Nutrients dust palliatives as necessary to prevent or alleviate dust Trash nuisance ge'nerated by construction activities. Covering small stockpiles or areas is an alternative to applying water or other Metals dust palliatives. Bacteria Oil and Grease Suitable Applications Organics Wind erosion control BIPs are suitable duxng the following construction activities: • Construct -Sion vehicle traffic on unpaved roads • Drilling and blasting activities • Sediment tracking onto paved roads • Soils and debris storage piles • Butch drop from front-end loaders a Areas with unstabilized soil • Final grading/site stabilization Limitations �r Watering prevents dust only for a short period and should be applied daily (or more often) to be effective. • Over watering may cause erosion. Potential Alternatives None •e .ems . FI t:ix i rMr: January 2003 California Stormwater BMP Handbook Cc nstruction www,ca bmpha ndbooks.co m J. cif 5 Wind Erosion Control WE -1 Dust Control Practices Dust control BNMPs generally stabilize exposed surfaces and minimize activities that suspend or track dust particles. The following table shows dust control practices that can be ap plied to site conditions that cause dust. For heavily traveled and disturbed areas, wet suppression (watering), chemical dust suppression, gravel asphalt surfacing, temporary- gravel construction entrances, equipment wash-out areas, and haul truck covers can be employed as dust control applications. Permanent or temporary vegetation and mulching can be employed for areas of occasional or no construction traffic. Preventive measures would include minimizing surface areas to be disturbed, limiting onsite vehicle traffic to 15 mph, and controlling the number and activity of vehicles on a site at any given time. SITE CONDITION CUsCONTROIPRACTICES Permanent Vegetation Mulching Wet Suppression [Watering') Chemical oust Suppression Gravel or Asphalt Silt Fences Temporary Gravel Construction Entrances/Equipmenl Wash Down Haul Truck Covers Minimize Extent of CI sxurt�ed Area Disturbed Areas not Subject to Traffic X X X X X X Disturbed Areas Subject to Traffic X X X X X Mater`s! Stock Pile Stabilization X X X i X Demolition 1 X X X Clearing/ Excavation X Truck Traffic on Unpavei Roads X X X X X M ud/Cirt Cart' c cut X X Additional preventive measures include: • Schedule construction activities to minimize exposed area (EC -1, Scheduling). ■ Quickly stabilize exposed soils using vegetation, mulching, spray -on adhesives, calcium chloride, sprinkling, and stone/gravel layering. • Identify and stabilize key access points prior to commencement of construction. • Ivlinimi7e the impact of dust by anticipating the direction of prevailing winds. • Direct most construction traffic to stabilized roadways within the project site. • Water should be applied by means of pressure-type distributors or pipelines equipped with a spray system or hoses and nozzles that will ensure even distribution. • ll distribution equipment should be equipped with a positive means of shutoff • Unless water is applied by means of pipelines, at least one mobile unit should be available at all times to apply water or dust palliative to the project. January 2003 California Sborrnwater BMP Handbook 3 of 5 Construction www.ca bmpha nd books.00 m Wind Erosion Control WE -1 Caltrans, Standard Specifications, Sections 10, "Dust Control"; Section 17, "Watering"; and Section 18, "Dust Palliative". Prospects for Attaining the State Ambient Air Quality Standards for Suspended Particulate Matter (PNI1n), Visibility Reducing Particles, Sulfates, Lead, and Hydrogen. Sulfide, California Air Resources Board, April 1991. Stormwater Quality Handbooks Construction Site Best Iv[anagement Practices (BMPs) ivlanual, State of CAlifornia Department of Transportation (Caltrans), November 2000. January 2003 California Stormwater BMP Handbook Sof 5 Construction www.cabmphandbooks.com Preservation Of Existing Vegetation EC -2 Description and Purpose Carefully planned preservation of existing vegetation minimizes the potential of removing or injuring existing trees, vines, shrubs, and grasses that protect soil from erosion. • Suitable Applications Preservation of existing vegetation is suitable for use on most projects. Large project sites often provide the greatest opportunity for use of this BMP. Suitable applications include the following: ■ Areas within the site where no construction activity occurs, or occurs at a later date. This BMP is especially suitable to multi year projects where grading can be phased. • Areas where natural vegetation exists and is designated for preservation. Such areas often include steep slopes, watercourse, and building sites in wooded areas. • Areas where local, state, and federal government require preservation, such as vernal pools, wetlands, marshes, certain oak trees, etc. These areas are usually designated on the plans, or in the specifications, permits, or environmental documents. • Where vegetation designated for ultimate removal can be temporarily preserved and be utilized for erosion control and sediment control. Objectives EC SE TR WE NS Erosion Control S ediment C antral Trading Control Wind Erosion Control Non-Stormwater Management Control Waste Management and Materials Pollution Control Legend: 0 Primary Objective Q Secondary Objective Targeted Constituents Sediment Nutrients Trash Metals Bacteria Oil and Grease Organics 2 Potential Alternatives None January 2003 California Sb rmweter SMP Handbook 1 o 4 Construction www.cabmphandbooks.com Preservation Of Existing Vegetation EC -2 Costs There is little cost associated with preserving existing vegetation if properly planned during the project design, and these costs may be offset by aesthetic benefits that enhance property values. During construction, the cost for preserving existing vegetation will likely be less than the cost of applying erosion and sediment controls to the disturbed area. Replacing vegetation inadvertently destroyed during construction can be extremely expensive, sometimes in excess of $10,000 per tree. Inspection and Maintenance During construction, the limits of disturbance should remain clearly marked at all times. Irrigation or maintenance of existing vegetation should be described in the landscaping plan. If damage to protected trees still occurs, maintenance guidelines described below should be followed: ▪ Verify that protective measures remain in place. Restore rlamaged protection measures imme diately. • Serious tree injuries shall be attended to by an arborist. • Damage to the crown, trunk, or root system of a retained tree shall be repaired immediately. ■ Trench as far from tree trunks as possible, usually outside of the tree drip line or canopy. Curve trenches around trees to avoid large roots or root concentrations. If roots are encountered, consider tunneling under them. When trenching or tunneling near or under trees to be retained, place tunnels at least 18 in.. below the ground surface, and not below the tree center to minimize impact on the roots. • Do not leave tree roots exposed to air. Cover exposed roots with soil as soon as possible. If soil covering is not practical, protect exposed roots with wet burlap or peat moss until the tunnel or trench is ready for backfill. • Cleanly remove the ends of damaged roots with a smooth cut. • Fill trenches and tunnels as soon as possible. Careful filling arid tamping will eliminate air spaces in the soil, which can damage roots. ■ If bark damage occurs, cut back all loosened bark into the undamaged area, with the cut tapered at the top and bottom and drainage provided at the base of the wood. Limit cutting the undamaged area as much as possible. i Aerate soil that has been compacted over atrees root zone by punching holes 12 in. deep with an iron bar, and moving the bar back and forth until the soil is loosened. Place holes 18 in. apart throughout the area of compacted soil under the tree crown. ■ Fertilization — Fertilize stressed or damaged broadleaftrees to aid recovery. — Fertilize trees inthe late fail or early spring. January 2003 California Stormwater BMP Handbook Sof 4 Co nstruction www.cabrnphandbooks.co m Hydraulic Mulch EC -3 Description and Purpose Hydraulic mulch consists of applying a mixtare of shredded. wood fiber or a hydraulic matrix, and a stabilizing emulsion or tackrfier with hydro -mulching equipment, which temporarily protects exposed soil from erosion by raindrop impact or wind. Suitable Applications Hydraulic mulch is suitable for soil disturbed areas requiring temporary protection until permanent stabilization is established, and disturbed areas that will be re -disturbed following an extended period of inactivity, Limitations Wood fiber hydraulic mulches are generally short lived and need 24 hours to dry before rainfall occurs to be effective. May require a second application in order to remain effective for an entire rainy season. Implementation • Prior to application, roughen embankment and fill areas by rolling with a crimping or punching type roller or by track walking. Track walking shall only be used where other methods are unpractical. • To be effective, hydraulic matrices require 24 hours to dry before rainfall occurs. • Avoid. mulch over spray onto roads, sidewalks, drainage channels, existing vegetation, etc. Objectives EC SE TR WE 1 1VstC�it Erosion Control Sediment Control Tracking Control VI/ ind Erosion Control t] Non -S tormwater Management Control Waste Management and Materials Pollution Control Legend: Primary Objective ❑x Secondary Objective Targeted Constituents Sediment Nutrients Trash Metais Bacteria 0il and Grease Organics Potential Alternatives EC -4 Hydroseeding EC -5 Soil Binders EC -6 Straw Mulch EC -7 Geotextiles and Mats EC -8 Wood Mulching January 2003 California Sbbrmwater BMP Handbook Construction www.cabmpharrdbooks.cnm 1 of 3 Hydraulic Mulch EC -3 Sedimentation and Erosion Control, An Inventory of Current Practices Draft, US EPA, April 1990. Soil Erosion by Water, Agriculture Information Bulletin #513, U.S. Department ofAgriculture, Soil Conservation Service. Startnwater Quality Handbboks Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), November 2000. Guidance Document: Soil Stabilization for Temporary Slopes, State of California Department of Transportation (Caltrans), November 1999 Stormwater Management of the Puget Sound Basin, Technical Manual, Publication #91-75, Washington State Department of Ecology, February 1992. Water Quality Management Plan for the Lake Tahoe Region, Volume II, Handbook of Management Practices, Tahoe Regional Planning Agency, November 1988. January 2003 California Strrmwater BMP Handbook 3 of 3 Construction www.cabmphandbooks.00m Geotextl l es and Mats EC -7 Description and Purpose Mat Ings of natural materials are used to cover the soil surface to reduce erosion from rainfall impact, hold soil in place, and absorb and hold moisture near the soil surface. Additioua11y, matting may be used to stabilise soils until vegetation is established. Suitable Applications Mattitrgs are commonly applied on short, steep slopes where erosion hazard is high and vegetation will be slow to establish. 1vlattings are also used on stream banks where moving water at velodities between 3 ft/s and 6 ft/s are likely to wash out new vegetation, and in areas where the soil surface is disturbed and where existing vegetation has been removed. Matting may also be used when seeding cannot occur (e.g., late season construction and/or the arrival of an early rain season). Erosion control matting should be considered when the soils are fine grained and potentially erosive. These measures should be considered in the following situations. ■ Steep slopes, generally steeper than 3:1 (H:V) • Slopes where the erosion potential is high s Slopes and disturbed soils where mulchmust be anchored • Disturbed areas where plants are slow to develop s Channels with flows exceeding 3.3 ft/s Objectives EC Erosion Control SE Sediment Control TR Tracking Control WE Wind Erosion Control NS Non-Stormwater Management Control Waste Management and Materials Pollution Control r✓I Legend: • Primary Objective • Secondary Objective Targeted Constituents Sediment Nutrients Trash Metals Bacteria Oil and Grease Organics Potential Alternatives EC -3 Hydraulic Mulch EC -4 Hydroseeding EC -5 Soil Binders EC -6 Straw Mulch EC -8 Wood Mulching January 2003 California Sinrmwater BMP Handbook 1 of 11 Construction www.cabrnphandbooks.com Geotextiles and Mats EC -7 The fo llowi ng natural and synthetic mattings are commonly used: Geo textiles ▪ Material should be a woven polypropylene fabric -with Minh -num thickness of o.o6 in., minimum width of12 ft and should have minima. tensile strength of iso lbs (warp), 80 lbs (fill) in conformance with the requirements in ASTM Designation: D 4632 The permittivity of the fabric should be approximately 0.07 sec' in confoimance with the requirements in ASTM Designation: D4491. The fabric should have an ultraviolet (UV) stability of 70 percent in conformance with the requirements in ASTM designation: D4355. Geotextile blankets must be secured in place with wire staples or sandbags and by keying into tops of slopes to prevent infiltration of surface waters under geotextile. Staples should be made of minimlirrt u gauge steel wire and should be U-shaped with 8 in. legs and 2 in. crown. • Geotextiles may be reused if they are suitable for the use intended. Plastic Covers ■ Plastic sheeting should have a minimum thickness of 6 mils, and must be keyed in at the top of sic pe and firmly held in place with sandbags or other weights placed no more than to ft apart. Seams are typically taped or weighted down their entire length, and there should be at least a 12 in. to 24 in. overlap of all seams. Edges should be embedded a minimum of 6 in. in soil. ▪ All sheeting must be inspected periodically after installation and after si,ificant rainstorms to check for erosion, undermining, and anchorage failure. Any failures must be repaired irnm ediately. If washout or breakages occur, the material should be re -installed after repairing the damage to the slope. Erosion Control Blankets/Mats • Biodegradable rolled erosion control products (RECPs) are typically composed of jute fibers, curled wood fibers, straw, coconut fiber, or a combination of these materials. In order for an RECP to be considered l00% biodegradable, the netting, sewing or adhesive system that holds the biodegradable mulch fibers together must also be biodegradable. Jute is a natural fiber that is made into a yarn that is loosely woven into a biodegradable mesh. It is designed to be used in conjunction with vegetation and has longevity of approximately one year. The material is supplied in rolled strips, which should be secured to the soil with U-shaped staples or stakes in accordance withmanufacturers' recommendations. Excelsior (curled wood fiber) blanket material should consist ofmachin e produced mats of curled wood excelsior with 8o percent of the fiber 6 in. or longer. The excelsior blanket should be of consistent thickness. The wood fiber must be evenly distributed over the entire area of the blanket. The top surface of the blanket should be covered with a photodegradable extruded plastic mesh. The blanket should be smolder resistant without the use of chemical additives and should be non-toxic and non -injurious to plant and animal life. Excelsior blankets should be furnished in rolled strips, a minimum of 48 in. wide, and should have an average weight of o.8 lb/yd2, }i.o percent, at the time of manufacture. Excelsior blankets must be secured in place with wire staples. Staples January 2003 California Strrmwater BMP Handbook 3 of 11 Co nstructton ww w.cabmpha rrd books.co m Geotextiles and Mats EC -7 - Plastic netting is a lightweight biaxially oriented nett designed for securing loose mulches like straw or paper to soil surfaces to establish vegetation. The netting is photodegradable. The netting is supplied in rolled strips, which must be secured with U- shaped staples or stakes in accord rnce with manufacturers' recommendations. Plastic mesh is an open weave geotextile that is composed of an extruded synthetic fiber woven into a mesh with an opening size of less than 1/4 in. It is used with re - vegetation or may be used to secure loose fiber such as straw to the ground. The material is supplied in rolled strips, which roust be secured to the soil with U-shaped staples or stakes in accordance with manufacturers' recommendations, - Synthetic fiber with netting is a mat that is composed of durable synthetic fibers treated to resist chemicals and ultraviolet light The mat is a dense, three dimensional mesh of synthetic (typically polyolefin) fibers stitched between two polypropylene nets. The mats are designed to be re -vegetated and provide a per.uuanent composite system of soil, roots, and geomatrix. The material is furnished in rolled strips, which must be secured with U-shaped staples or stakes in accordance with manufacturers' recommendations. - Bonded synthetic fibers consist of a three dimensional geomatrix nylon (or other synthetic) Matti g. Typically it has more than 90 percent open area, which facilitates root growth.. It's tough root reinforcing system anchors vegetation and protects against hydraulic lift and shear forces created by high volnxn e discharges. It carr be installed over prepared soil, followed by seeding into the mat. Once vegetated, it becomes an invisible composite system of soil, roots, and geomatrix. The material is furnished m rolled strips that must be secured with U-shaped staples or stakes in accordance with manufacturers' re corrrrnendations. Combination synthetic and biodegradable RECPs consist of biodegradable fibers, such as wood fiber or coconut fiber, with a heavy polypropylene net stitched to the top and a high strength continuous filament geomatrix or net stitched to the bottom. The material is designed to enhance re -vegetation. The material is furnished in rolled strips, which must be secured with U-shaped staples or stakes in accordance with manufacturers' recommendations* Site Preparation • Proper site preparation is essential to ensure complete contact of the blanket or matting with the soil. ▪ Grade and shape the area of installation. ▪ Remove all rocks, clods, vegetation or other obstructions so that the installed blankets or mats will have complete, direct contact with the soil. ✓ Prepare seedbed. by loosening 2 to 3 in. of topsoil. Seeding Seed the area before blanket installation for erosion control and revegetation. Seeding after mat installation is often specified for turf reinforcement application. When seeding prior to blanket January 2003 California Stormwater BMP Handbook 5 of 11 Construe on www.cabmphandbooks.com • • Geotextiles and Mats EC -7 a When blankets must be spliced, place blankets end over end (shingle style) with 6 in overlap. Staple through overlapped area, approximately 12 in_ apart. s Lay blankets loosely and maintain direct contact with the soil. Do not stretch. • Staple blankets sufficiently to anchor blanket and m.aintam contact with the soil. Staples should -be placed down the center and staggered with the staples placed along the edges. Steep slopes, 1:1 (RV) to a:J. (H: V), require anon -aim= of 2 staples/yd2. Moderate slopes, 2:1 (H:V) to 3:1 (H:V), require a minimZim of 1 I/? staples/yd2. Installation in Channels Installation should be in accordance with the manufacturer's recommendations. In general, these will be as follows: • Dig initial anchor trench 12 in. deep and 6 M. wide across the channel at the lower end of the project area. • Excavate intermittent check slots, 6 in. deep and 6 in. wide across the channel at 25 to 30 ft intervals along the channels. ■ Cut longitudinal channel anchor trenches 4 in. deep and 4 in. wide along each side of the installation to bury edges of matting, whenever possible extend matting 2 to 3 in. above the crest of the channel side slopes. ■ Beginning at the downstream end and in the center of the channel, place the initial end of the first roll in the anchor trench and secure with fastening devices at 12 in. intervals. Note: matting will initially be upside down in anchor trench. • In the same manner, position adjacent rolls in anchor trench, overlapping the preceding roll a minimum of 3 in. • Secure these initial ends of mats with anchors at 12 in. intervals, backfill and compact soil. • Unroll center strip of matting upstream. Stop at next check slot or terminal anchor trench. Unroll adjacent mats upstream in similar fashion, maintaining a 3 in. overlap. • Fold and secure all rolls of matting snugly into all transverse check slots. Lay mat in the bottom of the slot then fold back against itself Anchor through both layers of mat at 12 in. intervals, then backfill and compact soil. Continue rolling all mat widths upstream to the next check slot or terminal anchor trench. • Alternate rnethod for non-critical installations: Place two rows of anchors on 6 in_ centers at 25 to 30 ft. intervals in lieu of excavated check slots. • Staple shingled lap spliced ends a minimum of 12 in. apart on 12 in. intervals. • Place edges of outside mats in previously excavated longitudinal slots; anchor using prescribed staple pattern, back -R-11, and compact soil. • ■ Anchor, fill, and compact upstream end of mat in a 12 in. by 6 in. terminal trench. January 2003 California Storm water BMP Handbook 7 of 11 Co nstruction www.cabmpha ndbooks .co m Geotextiles and Mats EC -7 s Areas where erosion is evident shall be repaired and BMPs reapplied as soon as possible. Care should be exercised to minimize the damage to protected areas while making repairs, as any area damaged will require reapplication of BMPs. • If washout or breakage occurs, re -install the material after repairing the damage to the slope or channel. x Make sure matting is uniformly in contact with the sail. x Check that all the lap joints are secure. • Check that staples are flush with the ground. • Check that disturbed areas are seeded. References Guides for Erosion and Sediment Controls in California, USDA Soils Conservation Service, January iggi. National Management Measures to Control Nonpoint Source Pollution from Urban Areas, United States Environmental Protection Agency, 2002, Stogy iwat6r Quality Handbooks Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), November 2000. Guidance Document Soil Stabilization for Temporary Slopes, State of California Department of Transportation (Caltrans), November 1999 Stormwater Management of the Puget Sound Basin,, Technical Manual, Publication #91-75, Washington State Department of Ecology, February 1992. Water Quality Management Plan for The Lake Tahoe Region, Volume II, Landbook of Management Practices, Tahoe Regional Planning Agency, November 1988. January 2003 California Stormwater BMP Handbook 9 of 11 Construction www.cabmphandbooks.com Geotextiles and Mats EC -7 INITIAL CHANNEL ANCHOR TRENCH NTS Stake at 3' to 5' intervals TERMINAL SLOPE AND CHANNEL ANCHOR TRENCH NTS 1s 6" INTERMITTENT CHECK SLOT NTS Yf:,\r Check slot at 25-3' intervals I SOME [RIC 'VIEW NTS 4" 4" anchor shoe fes rte '/\fir" �, 4 4" LONGITUDINAL ANCHOR IRENCH NTS NO -TES: 1. Check slots to be constructed per manufacturers specifications, 2. Staking or stapling layout per manufacturers specifications, 3. Install per manufacturer's recommendations TYPICAL INSTALLATION DETAIL January 2003 Cerifornia Stora,water BMP Handbook Construction www.cebmphandtzooks.com 11 of 11 Earth Dikes and Drainage Swales EC -9 Description and Purpose An earth dike is a temporary berm or ridge of compacted soil used to divert runoff or channel water to a desired location.. A drainage swale is a shaped and sloped depression in the soil surface used to convey runoff to a desired location. Earth dikes and drainage swales are used to divert off site runoff around the construction site, divert runoff from stabilized areas and disturbed areas, and riirect runoff into sediment basins or traps. Suitable Applications Earth dikes and drainage swales are suitable for use, individually or together, where runoff needs to be diverted from one area and conveyed to another. ■ Earth dikes and drainage swales may be used: To convey surface runoff down sloping lend To intercept and divert runoff to avoid sheet flow over slo ped surfaces To divert and direct runoff towards a stabilized watercourse, drainage pipe or channel - To intercept runoff from paved surfaces - Below steep grades where runoffbegins to concentrate - Along roadways and facility improvements subject to flood drainage Objectives EC Erosion Control SE Sediment Control TR Tracking Control WE Wind Erasion Control NS Non-Stormwater Management Control Waste Management and Materials Pollution Condrol Legend: Q Primary Objective Secondary Objective Targeted Constituents Sediment nlutients Trash Metals Bacteria Oil and Grease Organics Potential Alternatives None January 2003 California Starmwater BMP Handbook Construct on www.cabmphandbooks.com 1 of 7 Earth Dikes and Drainage Swales EC -9 compacted by a second pass of the tracks or wheels over the ridge. Diversion structures should be installed when the site is initially graded and remain in place until post construction BMPs are installed and the slopes are stabilized. Diversion practices concentrate surface runoff, increasing its velocity and erosive force. Thus, the flow out of the drain or swale must be directed onto a stabilized area or into a grade - stabilization structure. If significant erosion will occur, a swale should be stabilizedusing vegetation, chemical treatment, rock rip -rap, matting, or other physical mea -os of stabilization. Any drain or swale that conveys sediment laden runoff must be diverted into a sediment basin Or trap before it is discharged from the site. General • Care must be applied to correctly size and locate earth dikes, drainage swales. Excessively steep, unlined dikes, and swales are subject to erosion and gully formation. ▪ Conveyances should be stabilized. • Use a lined ditch for high flow velocities. a Select flow velocity based on careful evaluation ofthe risks due to erosion of the measure, soil types, overtopping, flow backups, washout, and drainage flow patterns for each project site. a Compact any fills to prevent unequal settlement. • Do not divert runoff onto other property without securing written authorization from the property owner. • When possible, install and utili7e permanent dikes, swales, and ditches early in the construction process. ▪ Provide stabilized outlets. Earth Dikes Temporary earth dikes are a practical, inexpensive BMP used to divert stonuwater runoff. Temporary diversion dikes should be installed in the following manner: • All dikes should be compacted by earth moving equipment • All dikes should have positive drainage to an outlet. • All dikes should have 2'1 or flatter side slopes, 18 in. minimum height, and a minimum top width of 24 in. Wide top widths and flat slopes are usually needed at crossings for construction traffic. • The outlet from the earth dike must function with a minimum of erosion. Runoff should be conveyed to a sediment trapping device such as a Sediment Trap (SE -3) or Sediment Basin (SE -2) when either the dike channel or the drainage area above the dike are not adequately stabilized. January 2003 California Storrnwater BMP Handbook 3 of 7 Construction www.ca bmphandbooks.com Earth Dikes and Drainage Swales EC -9 • Stabilize all swales irnrnediately. Seed and mulch swales at a slope of less than 5 percent, and use rip -rap or sod for swales with a slope between 5 and 15 percent. For temporary swales, geotextiles and mats (EC -7) may provide immediate stabilization. • Irrigation may be required to establish sufficient vegetation to prevent erosion. ■ Do not operate construction vehicles across a swale-unless a stabilized crossing is provided. ■ Permanent drainage facilities must be designed by a professional engineer (see the local drainage design criteria for proper design). .� At a minirmirn, the drainage swale should conform to predevelopment drainage patterns and capacities. • Construct the drainage swale with a positive grade to a stabilized outlet. w Provide erosion protection or energy dissipation measures if the flow out of the drainage swale can reach An erosive velocity. Costs • Cost ranges from $15 to $55 per ft for both earthwork and stabilization and depends on availability of material, site location, and access. ■ Small dikes: $2.50 - $6.5o/1 rear ft; Targe dikes: $2.50/yd3. • The cost of a drainage swale increases with drainage area and slope. Typical swales for controlling internal erosion are inexpensive, as they are quickly formed during routine earthwork. Inspection and Maintenance • Inspect BMPs prior to forecast rain, daily during extended rain events, after rain events, weekly during the rRiny season, and at two-week intervals during the non -rainy season • Inspect BMPs subject to non-stormwater discharges daily while non-stormwater discharges occur. ■ Inspect ditches and beaus for washouts. Replace lost riprap, damaged linings or soil stabilizers as needed. • Inspect channel linings, embankments, and beds of ditches and berms for erosion and accumulation of debris and sediment. Remove debris and sediment and repair linings and embankments as needed. ■ Temporary conveyances should be completely removed as soon as the surrounding drainage area has been stabilized or at the completion of construction References Erosion and Sediment Control Handbook, S.J. Goldman, K Jackson, TA Bursetynsky, P.E., McGraw Hill Book Company, 1986. January 2003 California Strumwater BMP Handbook 5 of 7 Constucbon www.cabrnpha nd books.co m Earth Dikes and Drainage Swales EC -9 Compacted fil f Minf Stcbirizing cover, when needed. Natural ground- line Fiow -es IF 2: 1 (H: V) slope or flatter TYPICAL DRAINAGE SWALE NOT TO SCALE Compacted fill NOTES: 1. Stabilize inlet, outlets and slopes. 2. Properly compact the subgrade. 2 4„ L Min Stabilizing cover, when needed Noturcl ground line TYPICAL EARTH DIKE NOT TO SCALE January 2003 California Stormwater SMP Handbook 7 of 7 Construction www.cabmphandbooks.com • Material Use WM-2 Description and Purpose Prevent or reduce the discharge of pollutants to the stores drain system or watercourses from material use by using alternative products, mirimi7ing hazardous material use onsite, and training employees and subcontractors. Suitable Applications This. BMP is suitable for use at all construction projects. These procedures apply when the followingmaterials are used or prepared onsite: • Pesticides and herbicides • Fertilizers • Detergents • Plaster ▪ Petroleum products such as fuel, oil, and grease • Asphalt and other concrete components • Other hazardous chemicals such as acids, lime, glues, adhesives, pains, solvents, and curing compounds ■ Concrete compounds • Other materials that may be detrimental if released to the environment Objectives EC SE TC WE NS Erosion Control Sediment Control Tracking Control Wind Erosion Control Non-Stormwater Management Control Waste Management and Materials Pollution Control Legend: • Primary Objective • Secondary Objective Targeted Constituents Sediment Nutrients Trash Metals Bacteria Oil and Grease Organics Potential Alternatives None 2.741fiNIA 3717/1711A. TFT January 2003 California Storrnwater BMP Handbook 1 of 3 Construction www.cabmphandbooks.c rn Material Use M-2 a Require contractors to complete the "Report of Chemical Spray Forms" when spraying herbicides and pesticides. ■ Keep an ample supply of spill clean up material near use areas Train employees in spill clean up procedures. ,r- Avoid exposing applied anaterials to rainfall and runoff unless sufficient time has been allowed for them to dry. Costs AL of the above are low cost measures. Inspection and Maintenance • Inspect and verify that activity -based BMPs are in place prior to the commencement of associated activities. While activities associated with the BMP are under way, inspect weekly during the rainy season and at two-week intervals in the non -rainy season to verify continued BIv1P implementation. ▪ Maintenance of this best management practice is minimal ▪ Spot check employees and subcontractors throughout the job to ensure appropriate practices are being employed. References Blueprint for a Clean Bay: Best Management Practices to Prevent Stormwater Pollution from Construction Related Activities; Santa Clara Valley Nonpoint Source Pollution Control Program, 1995. Coastal Nonpoint Pollution Control Program: Program Development and Approval Guidance, Working Group Working Paper; USEPA, April 1992. Stormwater Quality Handbooks - Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), November 2000. Stormwater Management for Construction Activities; Developing Pollution Prevention Plans and Best Management Practice, EPA 832-R-92005; LTSEPA, April 1992. January 2003 California Sbormwater BMP Handbook 3 of 3 Construction www.cabmphandbooks.com Spill Prevention and Contro WM-4 Description and Purpose Prevent or reduce the discharge of pollutants to drainage systems or watercourses from leaks and spills by reducing the chance for spills, stopping the source of spills, containiiag and cleaning up spills, properly disposing of spill materials, and training employees. This best management practice covers only spill prevention and control.. However, WM-i, Materials Delivery and Storage, and WNI--2, Material Use, also contain useful information, particularly on spill prevention. For information on wastes, see the waste management BMPs in this section. Suitable Applications This BMP is suitable for all construction projects. Spill control procedures are implemented anytime chemicals or hazardous substances axe stored on the construction site, including the following materials: • Soil stabilizers/binders • Dust palliatives • Herbicides ▪ Growth inhibitors • Fertilizers • Deicing/anti-icing chemicals Objectives EC SE Tc WE NS Erosion Control Sediment Control Tracking Control Wind Erosion Control Non-Stormwater Management Control Waste Management and Materials Pollution Control Legend: • Primary Objective E Secondary Objective Targeted Constituents Sediment Nutrients Trash Metals Bacteria Oil and Grease Organics Potential Alternatives N one ......acs ._ -...-9c.. January 2003 Galifomla Stormwater BMP Handbook Construction www.ca bmpha nd books.co m 1 of 6 Spill Prevention and Control WM-4 • Store and dispose of used cleanup materials, contaminated materials, and recovered spill material that is no longer suitable for the intended purpose in conformance with the provisions in applicable BMPs. • Do not allow water used for cleaning and decontamination to enter storm drains or watercourses. Collect and dispose of contaminated water in accordance with W M-io, Liquid Waste Management. • Contain water overflow or minor water spillage and do not allow it to discharge into drainage facilities or watercourses. ■ Place proper storage, cleanup, and spill reporting instructions for hazardous materials stored or used on the project site in an open, conspicuous, and accessible location. • Keep waste storage areas clean, well organized, and equipped with ample cleanup supplies as appropriate for the materials beim stored. Perimeter controls, containment structures, covers, and liners should be repaired or replaced as needed to maintain proper function. Cleanup ■ Clean up leaks and spills immediately. ■ tJse a rag for small spills on paved surfaces, a damp mop for general cleanup, and absorbent ruaterial for larger spills. If the spilled material is hazardous, then the used cleanup materials are also hazardous and must be sent to either a certified laundry (rags) or disposed of as ll azardous waste. ■ Never hose down or bury dry material spills. Clean up as much of the material as possible and dispose of properly. See the waste management BMPs in this section for specific information. Minor Spills • Minor spills typically involve small quantities of oil, gasoline, paint, etc. which can be controlled by the hast responder at the discovery of the spill. ■ Use absorbent materials on small spills rather than hosing down or burying the spill. • Absorbent materials should be promptly removed and disposed of properly. • Follow the practice below for a minor spill: Contain the spread of the spill.. - Recover spi l ]ed materials, - Clean the contaminated area and properly dispose of contaminated materials. Semi -Significant Spills ■ Semi -significant spills still can be controlled by the first responder along with the aid of other personnel such as laborers and the foreman, etc. This response may require the cessation of all other activities. January 2003 California Stormwater BMP Handbook 3 of 6 Construction www.cabmphandbooks.com Spill Prevention and Control WM-4 Vehicle and Equipment Maintenance • If maintenance must occur onsite, use a designated area and a secondary containment, located away from drainage courses, to prevent the ninon of stormwater and the runoff of spills. • Regularly inspect onsite vehicles and equipment for leaks and repair immediately • Check incoming vehicles and equipment (including delivery trucks, and employee and subcontractor vehicles) for leaking oil and fluids. Do not allow leaking vehicles or equipment onsite. • Always use secondary containment, such as a drain pan or drop cloth, to catch spills or leaks when removing or changing fluids, NI Place drip pans or absorbent materials under paving equipment when not in use. • Use absorbent materials on small spills rather than hosing down or burying the spill. Remove the absorbent materials promptly and dispose of properly • Promptly transfer used fluids to the proper waste or recycling drums. Dont leave full drip pans or other open containers lying around Ng Gil filters disposed of in trashcans or dumpsters can leak oil and pollute stormwater. Place the oil filter in a funnel over a waste oil -recycling drum to drain excess oil before disposal Oil filters can also be recycled. Ask the oil supplier or recycler about recycling oil filters. = Store cracked batteries in a non -leaking secondary container. Do this with all cracked batteries even if you think all the acid has drained out. If you drop a battery, treat it as if it is cracked. Put it into the containment area until you axe sure it is not leaking. Vehicle and Equipment Fueling ■ If fueling must occur onsite, use designate areas, located away from drainage courses; to prevent the runon of stormwater and the runoff of spills. • Discourage "topping off' of fuel tanks. • Always use secondary containment, such as a drain pan, when fueling to catch spills/ leaks. Costs Prevention of leaks and spills is inexpensive. Treatment and/ or disposal of contaminated soil or water can be quite expensive. Inspection and Maintenance ■ Inspect and verify -that activity—based BMPs are in place prior to the commencement of associated activities. While activities associated with the BMP are under way, inspect weekly during the rainy season and of two-week intervals in the non -rainy season to verify continued BMP implementation. • Inspect BMPs subject to non-stormwater discharge daily while non-stormwater discharges occur. January 2003 California StDrmwater BMP Handbook Sof 6 Construction www.cabmphandbooks.com Sanitary/Septic Waste Management WM-9 Description and Purpose Proper sanitary and septic waste management prevent the discharge of pollutants to storznwater from sanitary and septic waste by providing convenient, well-maintained facilities, and arranging for regular service and disposal. Suitable Applications Sanitary septic waste management practices are suitable for use at al] construction sites that use temporary or portable sanitary and septic waste systems. Lim itations° None identified. Implementation Sanitary or septic wastes should be treated or disposed dm accordance with state and local requirements. In many cases,. one contract with a local facility supplier will be all that it takes to make sure sanitary wastes are properly disposed. Storage and Disposal Procedures ■ Temporary sanitary facilities should be located away from drainage facilities, watercourses, and from traff.c circulation. When subjected to high winds or risk of high winds, temporary sanitary facilities should be secured to prevent overturning. • Wastewater should not be discharged or buried within the project site. Objectives EC Erosion Control SE Sediment Control TC Tracking Control WE Wind Erosion Control Mon-Stormwater NS Management Control Waste Management and Materials Pollution Control Legend: Primary Objecve 0 Secondary Objective Targeted Constituents Sediment Nutrients Trash Metals Bacteria Oil and Grease Organics z El Potential Alternatives None January 2003 California Stormwater BMP Handbook Construction www.cabrnphandbooks.com 1 of 3 Sanitary/Septic Waste Management WM-9 References Storznwater Quality Handbooks - Construction Site Best Management Practices (BMPs) Manual, State of California Department o f Transportation (Caltrans), November 2000. Storiuwater Management for Construction Activities; Developing Pollution Prevention Plans and Best Management Practice, EPA 832-R-92005; USEPA, April 1992. January 2003 California Stormwater BMP Handbook 3 of 3 Construction www.cabmphandbooks.cpm Liquid Waste Management W M -1 0 Description and Purpose Liquid waste management includes procedures and practices to prevent discharge of pollutants to the storm drain system or to watercourses as aresult of the creation, collection, and disposal of non -hazardous liquid wastes. Suitable Applications Liquid waste management is applicable to construction projects ti•ratgenerate any of the following non -hazardous by-products, residuals, or wastes: 1 ■ Drilling slurries dnd'drill fluids • Grease -free and oil -free wastewater and rinse water • Dredgings • Other non-stoamwater liquid discharges not permitted by separate permits Lim itations • Disposal of some liquid wastes may be subject to specific laws and regulations or to requirements of other permits secured for the construction project (e.g., NPDES permits, Army Corps permits, Coastal Commission permits, etc.). • Liquid waste management does not apply to dewatering operations (NS -2 Dewatering Operations), solid waste management (W1vI-5, Solid Waste Management), hazardous Objectives EC SE TC WE NS Erosron Control Sediment C ontoi Tracking Control Wind Erosion Cor;trnl Non-Stormwater Management Control Waste Management artd Materials Pollution Control Legend: E Primary Objective El Secondary Objective Targeted Constituents Sediment Nutrients Trash Metals Bacteria Oil and Grease Organics Potential Alternatives None L'=. L.1+?H:!'L!i ] I GttI.1WA January 2003 California Stcrmwater B1,1P Handbook Construction www.eabmphandbooks.com 1 of 4 Liquid Waste Management WM-10 X Precautions should be taken to avoid spills or accidental releases of contained liquid wastes. Apply the education measures and spill response procedures outlined in WNI-4, Spill. Prevention and Control. ■ Containment areas or devices should not be located where accidental release ofthe contained liquid can threaten health or safety or discharge to water bodies, channels, or storm drains. Capturing Liquid Wastes a Capture all liquid wastes that have the potential to affect the storm drainage system (such as wash water and rinse water from clearing walls or pavement), before they run off a surface. NI Do not allow liquid wastes to flow or discharge uncontrolled. iTse temporary dikes or berms to intercept flows and direct them to a containment area or device for capture. a Use a sediment trap (SE -3, Sediment Trap) for capturing and treating sediment laden liquid waste or capture in a containment device and allow sediment to settle. Disposing of Liquid Wastes a A typical method to handle liquid waste is to dewater the contained liquid waste, using procedures such as described in NS -2, Dewatering Operations, and SE -2; Sediment Basin, and dispose of resulting solids per WM-5, Solid Waste Management a Methods of disposal for some liquid wastes tuay be prescribed in Water Quality Reports, NPDES permits, Environmental Impact Reports, 401 or 404 permits, and local agency discharge permits, etc. Review the SWPPP to see if disposal methods are identified. • Liquid wastes, such as from dredged material, may require testing and certification whether it is hazardous or not before a disposal method can be determined. it For disposal of hazardous waste, see WM-6, Hazardous Waste Management. a If necessary, farther treat liquid wastes prior to disposal. Treatment may include, though is not limited to, sedimentation, filtration, and chemical neutralization Costs Prevention costs for liquid waste management are minimal. Costs increase if cleanup or fines are involved. Inspection and Maintenance • Inspect and verify that activity—based BMPs are in place prior to the commencement of associated activities. While activities associated with the BMP are under way, inspect weekly during the rainy season rtd of two-week intervals in the non -rainy season to verify continued BMP implementation. ■ Inspect BMPs subject to non-stormwater discharge daily while non-stormwater discliarges occur. January 2003 California Storrnwater BMP Handbook 3 of 4 Co nstructio n www.ca bmpha ndboo ks.co m Section 5 Glossary and List of Acronyms 5.1 Glossary 303(d) Listed: Water bodies listed as impaired as per Section 303(d) of the 1972 Clean Water Act. Best Man.agementPractices (BMPs): Includes schedules of activities, prohibitions of practices, maintenance procedures, and other management practices to prevent eliminate, or reduce the pollution of waters of the receiving waters. BMPs also include treatment requirements, operating procedures, and practices to control plant site runoffspillage or leaks, sludge or waste disposal, or drainage from raw material storage. Catch Bain (Also known as Inlet): Box -like underground concrete structure with openings in curbs and gutters designed to collect runoff from streets and pavement. Clean WaterAct(CW4): (33 U.S.C. 1251 et seq.) requirements of the NPDES program are defined under Sections 307, 402, 318 and 405 of the CW A. Construction Activity: Includes clear , �ading, excavauv„, and contractor activities that result in soil disturbance. Construction General Permit: A National Pollutant Discharge Elirnination System (NPDES) permit issued by the State Water Resources Control Board for the discharge of stormwater associated with construction activity from soil disturbance of five acres or more. Threshold lowered to one acre beginning October 10, 2003. Construction General Permit No. CAS000002. Denuded: land stripped ofvegetation. or land that has had its vegetation worn down due to the impacts from the elements or humans. Detention: The capture and subsequent release of stormwater runoff from the site at a slower rate than it is collected, the difference being held in temporary storage. Discharge: A release or flow of sto ri Tlwater or other substance from a conveyance system or storage container. Broader — includes release to storm drains, etc. E,uentLimits: Limitations on amounts of pollutants tbatmay be contained in a discharge. Can be expressed in a number of ways including as a concentration, as a concentration over a time period (e.g., 3o -day average must be less than 20 mg/l), or as a total mass per time unit, or as a narrative limiit. Erosion: The wearies away of land surface by wind or water. Erosion occurs naturally from weather or runoff but can be intensified by land -clearing practices related to farming, new development, redevelopment, road building, or timber cutting. January 2003 California Sb rmwater BMP Handbook Errata 9-04 Construction www. ca bmphand boo ks.co m 5-1 Section 5 Glossary and List of Acronyms • owner, to cation, type of project, and certifies that the owner will comply with the conditions of the construction General Permit. Notice of Termination (NOT): Formal notice to SWRCB B submitted by owner/ developer that a construction project is complete. IVP_DESPermit:-NPDES is an acronym for National Pollutant Discharge Elimination System. NPDES is the national program for administering and regulating Sections 307, 318, 402, and 405 of the Clean Water Act (CWA). In California, the State Water Resources Control Board (SWRCB) has issued a General Permit for stormwater discharges associated with industrial activities (see !appendix A). Outfall: The end point where storm drains discharge water into a waterway. Point Source: Any discernible, confined, and discrete conveyance from which pollutants are or may be discharged. This term does not include return flows from irrigated agriculture or agricultural stormwater runoff. Pollutant: Generally, fany substance introduced into the environment that adversely affects the usefulness of a resource. Pollution Prevention (P2): Practices and actions that reduce or eliminate the generation of pollutants. Precipitation: Any form ofrain or snow. Pretreatment: Treatment ofwaste stream before it is discharged to a collection system. Reclaim (water reclamation): Planned use of treated effluent that would otherwise be discharged without being put to direct use. Retention: The storage of stormwater to prevent it from leaving the development site. Reuse (water reuse): (see Reclaim) Runoff- Water originating from rainfall, melted snow, and other sources (e.g, sprinller irrigation) that flows over the land surface to drainage facilities, rivers, streams, springs, seeps, ponds, lakes, and wetlands. Run-on: Off site stormwater surface flow or other surface flow which enters your site. Scour: The erosive and digging action in a watercourse caused by flowing water. Secondary Containment: Structures, usually dikes or beans, surrounding tanks or other storage containers, designed to catch spilled materials from the storage containers. Sedimentation: The process of depositing soil particles, clays, sands, or other sediments that were picked up by runoff. January 2003 California Snrrnwater BMP Handbook Errata 9-04 Construction www.cabmphandbookrs.corn 5-3 Section 5 Glossary and List of Acronyms Turbidity: Describes the ability °flight to pass through water. The cloudy appearance of water caused by suspended and colloidal matter (particles). 5.2 Acronyms AASHTO American Association of State Highway and Transportation Officials AC Asphalt Concrete ADL Aerially Deposited Lead Ally' P Impervious Area AINF InflationArea ANSI American National St a n dards Institute APHA American Public Health _Association APWA American Public Works Association ARS Agricultural Research Service AQMD Air Quality lvlanagement District ASTM American Society for Testing Materials AWWA American Water Works Association BAT Best Available Technology (economically available) BCT Best Conventional Technology (pollution control) BFP Bonded Fiber Matrix BMPs Best Management Practices BOD Biological Oxygen Demand CA Contractor Activities CAL -EPA California Environmental Protection Agency CAL -OSHA California Division of Occupational Safety and Health Administration CASQA California Stoiwwater Quality Association CCR California Code of Regulations January 2003 California Stormwater BMP Handbook Errata 9-04 Construcbon www.cadmphandbooks.00rn 5-5 Section 5 Glossary and List of Acronyms MS4 MvIuni,cipal Separate Storm Sewer System MSDS Material Safety Data Sheet MSHA Mine Safety and Health Administration . NM --FS- National Marine -Fisheries Service NOAA National Oceanographic and Attnospheric Administration NOI Notice of Intent NPDES National Pollution Discharge Elimination System NPS Nonpoint Source NRC National Response Center NRCS Natural Resources Conservation Service NSF National Science Foundation NURP National Urban Runoff Program O&G Oil and Grease O&M Operations and Maintenance OSDS On-site Disposal System OSHA Occupational Safety and Health Administration P2 Pollution Prevention PAHs Polyaromatic Hydrocarbons PAM Polyaczylamide PCBs Polychlorinated Biphenyls PCC Portland Concrete Cement PPT Pollution Prevention Team POTW Publicly Owned Treatment Works PSD Particle Size Distribution • RCRA Resource Conservation and Recovery Act January 2003 California Stormwater BNP Handbook Errata 9-04 Construction www.cabmphandbook.s.com 5-7 INSTRUCTIONS FOR COMPLETING AN INSPECTION REPORT 1. Inspection of the construction areas will be performed by the field supervisor and field personnel. 2. During construction, the disturbed areas, structural control measures and locations where vehicles enter the site shall be inspected at least once every fourteen (14) -calendar days and within 24 hours of any precipitation and/or snowmett event which exceeds 0.5 inches. 3. After completion, of the construction, but prior to returning the disturbed areas to approximate preconstruction conditions, the disturbed areas shall be inspected at least once a q uarter. 4. An inspection report shall be immediately prepared and signed by the individual conducting the inspection. If the report describes deficiencies in pollution control structures or procedures, such deficiencies shall be corrected immediately. 5. Completed inspection reports must be kept with the SWPPP that covers the construction site. Example Inspection Report on next page Petrogulf Corporation Helmer Gulch SWMP 37 November 2005 • Appendix D Inspection; Inspection Sheet and Form Petrogulf Corporation Helmer Gulch SWMP 37 Update August 2006 • • Appendix D Inspection; Inspection Sheet and Form Petrogulf Corporation Helmer Gulch SWMP 36 November 2005 • Petrogulf Corporation Piceance Basin- Garfield County, Coforado Site I.D.: Date / Time: / Inspector: Inspection Type: New Construction Biennial Quarterly/Routine Precipitation Event Site Type: Well Site Road Ditch or Channel Other Site Status: Construction' Production; Reclaimed. Abandonment. Distance to Waters of State (Dry Swale, Pond, Stream Channel) Vegetation Checklist Well Site Revegetated? Yes No Seed Mixture (if known) Area Inspected Vegetation Density Comments or Required Action Adjacent Area Vegetation Open Juniper Sagebrush Meadows Woodlands leveled for livestock Pasture Land, _ Other, describe Well Site Cut Slope Rills evident rill free no or minor rills Rocky outcrop, Revegetated, Other Well Site Fill Slope Rills evident rill free no or minor rills _ Rocky outcrop, — Revegetated, Other Erasion and Sediment Control Checklist Any Sediment Containment Systems on Site? No Yes, If yes, are they working? No; if no describe _Yes work that is needed to repair the system. - Any Erosion Control BMPs on Site? No work Yes, if yes, are they working? Yes No; if no describe that is needed to repair the system. Site Observations When was the most recent precipitation event? Days Ago, rain/ wet snow Approximate amount of precipitation (inches). Rain Snow Did stormwater leave well site erosion or sediment controls? Yes No Hard to tell Is stormwater on site in secondary containments? Any spills or leaks on site (chemicals, water, etc.)? No Yes, describe; ex. OH, water Any Culverts near the site in need of cleanout/BMPs? No Yes Petrogulf Corporation Helmer Gulch SWMP 38 November 2005 • • INSTRUCTIONS FOR COMPLETING AN INSPECTION REPORT 1 Inspection of the construction areas will be performed by the field supervisor and field personnel. 2. During construction, the disturbed areas, structural control measures and locations where vehicles eater the site shall be. inspected at least once every fourteen (14) -calendar days and within 24 hours of any precipitation and/or snowmelt event which exceeds 0.5 inches. 3. After completion, of the construction, but prior to returning the disturbed areas to approximate preconstruction conditions, the disturbed areas shall be inspected at least once a quarter. 4. An inspection report shall be immediately prepared and signed by the individual conducting the inspection. If the report describes deficiencies in pollution control structures or procedures, such deficiencies shall be corrected immediately. 5. Completed inspection reports must be kept with the SWPPP that covers the construction site. Example inspection Report on next page Petrogulf Corporation Helmer Gulch SWMP 38 Update August 2006 • • Kimsey -Horn and Associates, Inc. April 10, 2007 Garfield County Building and Planning 108 8th Street, Suite 410 Glenwood Springs, Colorado 81601 Attn: Craig Richardson Re: Petrogulf Lay Down Facility Traffic Assessment and Trip Generation Letter, Garfield County, Colorado Dear Mr. Richardson: This letter presents the results of a traffic assessment and trip generation study for the proposed Petrogulf Lay Down Facility. This traffic study is intended to document the project trip generation and to confirm that auxiliary turn lanes are not required at the proposed access point. The project is to be located approximately 2 miles southwest of the City of Rifle along the north side of County Road 320 in Garfield County, Colorado. This area is commonly referred to as Taughenbaugh Mesa. The total site area is 41 acres. Petrogulf Corporation is proposing to construct, operate, and maintain a lay down yard for the purpose of storing pipe, valves, fittings, and other related equipment associated with their oil and gas operations. Access to the proposed project will be from an existing approved access off CR 320. Garfield County Road 320 can be categorized as Rural Highway (R -B) according to the State of Colorado State Highway Access Category Assignment Schedule. CR 320 provides access to the City of Rifle and Interstate 70 to the east and the Town of Rulison to the west. Site -generated traffic estimates are determined through a process known as trip generation. For this study, Kimley-Horn used information provided by the client to determine the number of vehicles anticipated to enter and exit the site during the AM and PM peak hours, as well as the number of vehicles anticipated to access the site per day. Initially, until the lay down yard is stocked, it is anticipated that the total number of trucks that will access the facility during a typical day would range from 2 to 3 trucks. After the yard is stocked, subsequent truck trips could average 2 to 3 total truck trips per week. It is important to note that on most days, no trips would be required from outside the operating area. Some items within the site would be delivered to future projects by smaller vehicles rather than the normal sized delivery trucks. To provide a conservative assessment of project generated traffic, it was assumed that 1 truck would be entering and exiting the site during both the AM and ■ TEL 303 228 2300 FAX 303 446 8678 ■ Suite 1050 950 Seventeenth street Denver, Colorado 80202 Kirnley-Horn &.] MEV I and Associates, Inc. h. Craig Richardson.1(1. 2no7. Page 2 PM peak hours, with 3 trucks entering and exiting the site daily. The following table identifies the anticipated trip generation for the project. Petrogulf Lay Down Facility Traffic Generation Distribution of site generated traffic on the street system was based on anticipated travel patterns to and from the site provided by the client. The directional distribution of traffic is a means to quantify the percentage of site -generated traffic that approaches the site from a given direction and departs the site in the same direction. Just east of the proposed lay down yard site there are steep switch -backs along CR 320. There is a posted sign prior to the sharp curves that has a stated weight limit of 80,000 for a 5 axle truck, and 54,000 for a 3 axle truck. This is anticipated to limit project truck traffic from accessing the site from the east along CR 320. Again, to provide a conservative assessment of project traffic, it was assumed that the one vehicle entering and exiting the site during both the AM and PM peak hours would either travel to and from the east or the west along CR 320. Depending on the vehicle's destination, it would either access I-70 to the east at the CR 13 interchange in Rifle, access 1-70 to the west at the CR 323 interchange in Rulison, or remain within the immediate vicinity. According to the State Highway Access Code, a left turn deceleration lane with taper and storage length is required for any access with a projected peak hour left ingress turning volume greater than 10 vph with the taper length included within the required deceleration length. According to the State Highway Access Code, a right turn deceleration lane and taper length is required for any access with a projected peak hour right turning volume greater than 25 vph with the taper length included within the required deceleration length. Based on warrants, right and left tum deceleration lanes are not required at the proposed access road intersection along CR 320. If you have any questions relating to this analysis, please call me at (303) 228-2300. Sincerely, KIMLEY-HORN AND ASSOCIATES, INC. Heidi von Waldburg Project Manager Vehicles Trips Daily Roundtrips AM Peak Hour PM Peak Hour In Out Total In Out Total DeBeque Water Storage 3 1 ] 1 2 1 1 2 Distribution of site generated traffic on the street system was based on anticipated travel patterns to and from the site provided by the client. The directional distribution of traffic is a means to quantify the percentage of site -generated traffic that approaches the site from a given direction and departs the site in the same direction. Just east of the proposed lay down yard site there are steep switch -backs along CR 320. There is a posted sign prior to the sharp curves that has a stated weight limit of 80,000 for a 5 axle truck, and 54,000 for a 3 axle truck. This is anticipated to limit project truck traffic from accessing the site from the east along CR 320. Again, to provide a conservative assessment of project traffic, it was assumed that the one vehicle entering and exiting the site during both the AM and PM peak hours would either travel to and from the east or the west along CR 320. Depending on the vehicle's destination, it would either access I-70 to the east at the CR 13 interchange in Rifle, access 1-70 to the west at the CR 323 interchange in Rulison, or remain within the immediate vicinity. According to the State Highway Access Code, a left turn deceleration lane with taper and storage length is required for any access with a projected peak hour left ingress turning volume greater than 10 vph with the taper length included within the required deceleration length. According to the State Highway Access Code, a right turn deceleration lane and taper length is required for any access with a projected peak hour right turning volume greater than 25 vph with the taper length included within the required deceleration length. Based on warrants, right and left tum deceleration lanes are not required at the proposed access road intersection along CR 320. If you have any questions relating to this analysis, please call me at (303) 228-2300. Sincerely, KIMLEY-HORN AND ASSOCIATES, INC. Heidi von Waldburg Project Manager PETROGULF CORPORATION MCLEOD PROPERTY LAYDOWN YARD SOUND LEVEL STUDY A sound monitoring test was taken by Wagon Wheel Consulting, Inc. to demonstrate the sound levels that can be expected outside the perimeter of the proposed McLeod Property Laydown Yard (PetroGulf Facility/ Laydown Yard), and to verify compliance with the Colorado State Noise Statute. Sound levels were measured at two Iocations at the Aztec Pipe & Supply Co. located in West Rifle, Garfield County, Colorado, on the south side of Hwy 6 & 24 and I-70. Sound measurements were taken between April 13, 2007 and April 14, 2007. One measurement was taken twenty-five (25) feet off the east property line and one measurement twenty-five (25) feet off the west property line (See Attached Map). These readings show comparison to the maximum permissible levels defined for residential land use by the Colorado State Noise Statute (C.R.S. §25-12-101 et seq.) The measured sound levels taken at the Aztec Pipe yard were taken to show comparison for sound levels from activities that will occur at the PetroGulf Laydown Yard. Aztec Pipe & Supply Co. is comparable to the proposed yard from the types of activities that occur such as: truck traffic loading and unloading, fork lift traffic, traffic to and from the site with pick-ups. The proposed PetroGulf Facility and the Aztec Pipe & Supply Facility are not comparable in location, routine daily activities and weekly activities, and additional noise sources not related to the facilities. The proposed facility is expected to have two to three trips per week by large trucks delivering or picking up materials, whereas, the existing facility (Aztec Pipe) receives numerous large trucks everyday, along with train traffic delivering materials. Aztec Pipe & Supply is located south of Hwy 6 & 24 and I-70 and north of the Union Pacific Railroad, which adds to the noise levels in and around the facility. The proposed facility is located north of County road 320 on Taughenbaugh Mesa. Traffic levels as well as the types of vehicles traveling County Road 320 are significantly less than traffic volumes around the Aztec Pipe & Supply yard. Aztec Pipe is also located adjacent to additional businesses that add higher noise levels in and around the site. The only other activities that will add to the noise levels around the site is traffic to and from a natural gas well location and farm traffic. The measured sound levels 25 feet outside of the Aztec Pipe & Supply Co. property were primarily below the Colorado State Statute 55 dBA limit for residential zoning during the daytime hours (Operating Hours). A few instances show levels to peek out above 65 dBA. Weather conditions, primarily wind and high wind gust, were unfavorable during the sound study. Winds were approximately 10 to 15 mph with gust as high as 25 mph. The higher wind speeds caused higher sound level readings. Additional sounds that were recorded but were not associated with the Aztec Pipe yard include but are not limited to: Traffic on Hwy 6 & 24 and I-70, Union Pacific Railroad trains, oil field traffic on access road located on west side of property, adjacent companies, birds, propeller and commercial aircraft operating overhead. Table 1 shows the sound monitoring equipment that was used to gather information from both locations at the Aztec Pipe yard. The sound meter was set to log two (2) second averages, which show more "peaks" and "valleys" to demonstrate overall sound levels from the site and surrounding areas not associated with the Aztec Pipe yard. Table 2 are graphs showing the actual readings taken from the two locations. TABLE 1 MEASUREMENT EQUIPMENT Location E s Make/Model Serial # Set 1 Sound Level Meter Extech/407764 1 5ND44 Set 2 Sound Level Meter Extech/407764 1 5ND44 ui ment EQUIPMENT SPECIFICATIONS Applicable Standards IEC651 Type 2, ANSI S1.4 Type 2 Accuracy ± 1.5dB (under reference conditions) Frequency Range 31.5Hz - 8KHz Measuring Level 30 — 130dB Frequency Weighting A and C Microphone 0.5" Electret condenser microphone Display 4 -digit LCD Resolution: 0.1 dB Display Period: 0.5 sec. 100dB scale, 2dB steps 50mS 1 to 86,400 seconds per record FAST: 125 mS, SLOW: 1 sec. 30-80dB, 40-90dB, 50-100dB, 60-110dB, 70-120dB, 80-130dB 30-130dB 0.707 Vrms at Full Scale Output impedance approx. 60012 10mVIdB Output impedance approx. 1001 Bargraph Sampling Rate Datalogging Sample Rate Time Weighting Level Ranges Auto Range AC Output DC Output TABLE 2 SET 1 SOUND MEASUREMENT GRAPH A 90 SOUND 2 SOUND MEASUREMENT GRAPH A 90 • • • On average the sound readings taken at Aztec Pipe & Supply demonstrate noise levels that can be expected from the proposed McLeod Property Laydown Yards related activities. Sound levels will actually be lower at the proposed facility due to the decrease in activities around the facility that are not related to the facility itself, and the overall activities that will occur at the proposed laydown yard. _.mi im..