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HomeMy WebLinkAbout1.08 Additional submittalSTORMWATER MANAGEMENT PLAN River Waterline Project GARFIELD COUNTY COLORADO, USA WAGON WHEEL CONSULTING 111 E. Third St, Suite 213 Rifle, CO 81650 01,111441c° 2141'3:1411A (970) 625-8433 1,31,4n00 013L� r14 ' ` aLfINIAD311 Date: 7/27/04 TEXT DATE LAST REVISED: 02 -July -16 STORM WATER MANAGEMENT PLAN SUPPLEMENT FORM — U. S. ROCKIES REGION Creator: Custodian: Date Approved:: US Rockies EHS US Rockies CSA 02 -July -16 SWMP Name: EnCana Gathering U.S.A Site/ Job Name: River Waterline Project Permit No: County: Garfield State: QTR NE QTR _ SW SEC 9 TWN 7S RNG 93W Prepared by: Cody W. Smith 1. Attach to this form, a simple sketch of the site outlining the construction. Include any ditches, canals, creeks, streams and rivers located within one-quarter mile of the site. Determine the direction of the drainage or flow gradient for the site. Identify this flow gradient with a simple arrow pointing in the direction of the flow. 2. Select the type of control feature used for the site. Describe in detail the erosion controls adopted for the site based on a study of the site and the general topography of the area. Show these erosion control features on the sketch. ►1 Baled Hay Z Berms Ditches Z Silt Fence ❑ Other (specify): Describe control features: The pipeline's approximate 50 foot right-of-way will be staked prior to construction to limit the area of disturbance required for construction. All personnel, vehicles and equipment will stay within the staked boundaries. Silt fences of hay bales will be placed on the down gradient side of the right-of-way when the pipeline is installed parallel to the grade contours of a hillside. Waterbars ending at straw bales will be installed in the right-of-way when the pipeline is installed on a hillside perpendicular to the grade contours. Spacing of the waterbars will be determined by the surface topography. Trench breakers will be installed in trenches on sloped prior to backfilling. Silt fence, straw bales, waterbars, andt trench breakers will not be used when the hillside gradient is less tha 5%. Silt fence and straw bales will be installed on the down slope and upslope sides of the construction area at the ephemoral drainage crossing points. 3. Describe the maintenance schedule developed for the site. If the construction at the site is to be handled by more than one operating group, identify the operating group that will subsequently take over the site. Brief the foreman/ supervisor in charge of the second phase of the activity of SWMP supplement details. The control features described in Part 2 above will be maintained during the construction installation phase of the pipeline project by the general contractor. The EnCana EHS coordinator will inspect the site on a bi-monthly basis and determine what, if any, repairs to the control structures are required. The EHS coordinator will review the inspection data with the general contractor and cause the necessary Focus5LMS1ProductnOperatelDescText1 SWMPSUPPLEMENTFORM-03013 ENC ANA r.. Page 1 of 2 TEXT DATE LAST REVISED: 02 -July -16 STORM WATER MANAGEMENT PLAN SUPPLEMENT FORM — U. S. ROCKIES REGION Creator: Custodian: Date Approved: US Rockies EHS US Rockies CSA 02 -July -16 repairs to be made. This inspection process will be followed during the entire construction phase of the project. 4. At the conclusion of all construction activities, begin the reclamation of the site. Describe how reclamation of the site is to be accomplished. If the site is located in an area of agriculture cultivation, grading the site back to its original contour will be sufficient. In other areas, grading and re -vegetation may be required. When the reclamation activities are 70% complete, enter the date the site attained 70% reclamation and sign form. When the pipeline istallation phase of the project has been completed the right-of-way will be restored as close as possible to pre -excavation grades and compaction. Topsoil will be redistributed as close to original salvage depths as possible. In areas with pre-existing rocky surface material, the stored rock will be spread over the right -of way to maintain a surface appearance to that of adjacent undisturbed terrain. Seeding will be applied with a planned seed mix and application rate. Permanent waterbars will be installed on slopes at the intervals indicated in Table 1 of the Stormwater Management Plan. Every effort will be made to install permanent erosion control measures within 30 days after the pipeline trench is backfilled. Periodic inspections of the site will be made to assure that isolated areas of soil erosion that may occur are corrected. When the grass seed has reached a vegative establishment level of 70 %, these inspections will cease. Date site was reclaimed to 70%: Name of person ensuring reclamation Signature Focus4LMS4ProduclnlDperetelDeseTexl4 SWMPSUPPLEMENTF0RM-09013 ENC; ANA r,, Page 2 of 2 STATH LF COLORADO Hill Owens;Governor )ane E. Norton, Executive Director Dedicated to protecting and improving the health and environment of the people or Colorado 4300 Cherry Creek Dr. 5. Denver, Colorado 811246.1330 Phone (3031602-2000 TDD Lint° 1303) 691-7700 Located in Clenria1e, Colorado Itttp:/, vww.cdphe.state.co.us January 15, 2003 Eric Marsh Vice President EnCana Oil & Gas (USA) Inc. 950 l7th Street Suite 2600 Denver, CO 80202 303/623-2300 Lahnratory and Radiation Services Division 8100 Lnwry Blvd. Denver, Colorado 802.30-692e (3,03) 692-3090 RE: Final Permit, Colorado Discharge Permit System — Stormwater Certification No: C0R-034840, Garfield County Mamma Creek Local Contact: David Grisso, Operations Super., 970/ 625-4209 Anticipated Activit}': 07/01/2002 through 06/30/2007 On 999 acres (5 acres disturbed) Dear Sir or Mariaro: Colorado Department of Public Health and Environment Enclosed please find a copy of the permit certification that was issued to you under the Colo. -ado Water Quality Control Act. Your certification under the permit requires that specific actions be performed at desigiinted times. You are leg 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 D-(17website at http://www.cdphe.state.co.us/wq/permitsunit/wqcdprro_htail, or contact Nathan Moore at (303) 692-3555. Sincerely, :;;;) Kathryn Dolan Stormwater Program Coordinator Permits Unit WATER QUALITY CONTROL DIVISION Enclosure xc: Regional Council of Governments Local County Health Department Disthct Engineer, Technical Services. WQCD • - rr eery vr.eek Drive Sou:it Coiorodo 80246-1530 RATIONALE STOPJVN'.4TER DISCHARGES ASSOCIATED Y37T T CONSTRUCTION ACTIVITY GENERAL PERMIT IN COLORADO SECOND RENEWAL COLORADO DISCHARGE PERMIT NUMBER COR -030000 CONTENTS PA GE 1. Introduction 1 II. Background 2 FII. Stormwater Discharges Associated with Construction Activity 3 IV. Coverage Under this Permit - 4 Y. Application and Certification 4 VI. Qualifying Local Programs 4 VII. Terms and Conditions of Permit 5 1. L TRODUCTION This permit is for the regulation of stormwater runoff from construction activities. The term "construction activity" includes clearing, grading and excavation operations. "Storrnwater" is precipitation -induced surface runoff.This Rationale will explain the background of the Stormwater program, activities which are covered under this permit, how to apply for coverage under this permit, and the requirements of this permit. The forms discussed in the Rationale and Permit are available on the Division's website at: http://www.cdphe.state.co.us/wq/permitsunit/wqcdpmt html A. Changes in this General Permit Several notable changes from the previous General Permit for Construction Activities have been incorporated into this permit. Most of the changes ark related to the Phase II revision to the storritwater regulation in the Colorado Discharge Permit System Regulations (SCCR 1002-61), effective March 2, 2001. Significant changes are listed below: 1. Permit coverage is now required for construction sites that disturb 1 to 5 acres (ie., small construction activities). Allowances have been made for small construction activities to comply with the requirements of a Division -approved Qualifying Local Program (refer to section VI below for a discussion of Qual Eying Local Programs) in place of many specific requirements in the Permit, including requirements to submit an application, inactivation notice, and fees to the Division. .Refer to Part LA.3 of the Permit and section Y11.A of the Rationale for more details. 2. The requirements to submit the Township, Range, section and quarter section of a site and a list of any other environmental permits for the site with the application have been removed. 3. Inactivation requirements have been changed to allow small construction activities that submit applications _indicating a completion date 12 months or less from the start of construction activity to be authorized for a predetermined period from 3 to 12 months. The permit certification will include the automatic expiration date for permit coverage. This expiration date will be in place of the requirement to submit an Inactivation Norice. If permit coverage beyond the expiration date is needed (i.e., the site has not been finally stabilized), the permittee must submit an extension request form to the Division at least ]0 days prior to the expiration - - _._ Cor..rro Division . u SSOCIAT. D N:'T.. CONSTRUCTION ACTIVIY Stormwcrer regulations require that stormwater discharges associated with certain industrial activities be covered under the per mi' praeTen:. Corsrruczian activity that disturbs one acre or more is specifically included in the listed industrial Constnrction Activity Construction activity includes clearing, grading and excavation activities. Construction does nor include routine maintenance performed by public agencies, or their agents to maintain original line and grade, hydraulic capacity, or original purpose of the facility. Deftni:ions of additional terms can be found in Part I.D of the Permit. stormwater discharges from construction activiry require permit coverage, except for operations that result in the disturbance of less than one acre of total land area which are not part of a larger common plan of development or sale. A larger common plan of development or sale is a contiguous area where multiple separate and distinct conssrtcrion activities may be taking place at different times on decent schedules under one plan. 5. :Floes orAcrvities Covered This permit is intended to cover most new or existing discharges composed entirely of srorn:waterfrom construction activities that are required by State regulation to obtain a permit. This includes stormwater discharges associated with areas that are dedicated ro producing earthen materials, such as soils, sand, and gravel, for use at a single constrr: on site. These areas may be located at the construction site or as some other location. This permit does ror author.=e rhe discharge of mine water or process waxer from such areas. 1 his pe+rrit also includes stormwater discharges associated with dedicated asphalt plants and concrete plants located ar the ronsr,-act]on sites. C. Tvpes or -Activities NOT Covered This permit does not cover stormwater discharged from construction sites that is mixed with stormwater from other types of industrial activities, or process water of any kind. Other types of industrial activities that require stormwater discharge permits pursuant to different sections of the rep lat-ions (Regulation 5 CCR 1002-61, Section 61.2(e)(iii)(A- I, K')J, are not covered by this permit. This permit also does not cover the discharge ofprocess water. If the construction activity encounters groundwater, a Construction Dewatering Discharge Permit (Permit Number CO.G-070000) must also be obtained in order to discharge this groundwaterfrom the excavation site. An application for this permit can be obtainedfrom the Division at the address listed in PartI.A.4.a of the Permit. D. Exemptions for Small Municipalities The Intermodal Surface Transportation Efficiency Act of 1991 (Section 1068(c)) added an exemption to the stormwater regulations for municipalities with less than 100,000 population. The term "municipality" includes cities, towns, counties, special districts or any entity created by or pursuant to State law. Stormwater discharges associated with construction activity for facilities ar sites that are owned or operated by a small municipality are not required to applyfor or obtain a stormwater permit until March 10, 2003. (Note: This exemption does not apply to other, privately owned construction sites within Me same small municipality.) Cor.rro! Division •._.. -- L._' _- iJ..'.. ... . _ ., C:1! .D:TJO.N:+ o P.:.''j of Ccv�-roe under c Oucliri ns Local Program — For Small Construction Sires Onlv For small consr-Jction sires (disturbing less than 5 acres) covered under a Qualifying Local Program (see Section YI above), only certain permit requirements apply, as outlined below. The local program must have been formally designated by the Division ro qualify. Most municipalities have some rope of local program and may require permits and fees. However, simply having a prop am in place does not necessarily mean that it is a gualing program and that c Stare permit is not required. The local municipality will be responsible for notifying operators andior owners that they are covered by a Qualifying Local Program. 4 list of municipalities with Oualtfying Local Programs is also available at hip://www.cdphe.state.co.us/wq/PermitsUnir/wgcdpmt.hrml. The Division reserves the right to require any owner or operator within the jurisdiction of a Qualii5fing Local Program covered under this permit to apply for and obtain coverage under rhe full requirements of this permit. J. Permit Coverage: If a corsrrction sire is within the jurisdiction of a Ouali "tying Local Program, the operator of the construction ariviry is authorized to discharge stormwater associated with small construction activity under this general permit without the submittal of an application to the Division. The permittee also is not required zo submit an inactivation notice or payment of an annual fee, 2. Permit Terms and Conditions: The perrnirree covered by a Oualving Local Program muse comply with the requirements of the Oualii5,ing Local Program which has jurisdiction over the site. In addition, the following permit sections are applicable: J.4.1, ].A.2, and 1..4.3: Authorization to discharge and discussion of coverage under the permit. 1: General limitations that must be met in addition to local requirements. iii. I.C.2, I.C.3: Prohibition of non-srormwater discharges unless addressed in a se_oarare CDPS permit and requirements related ro releases of reportable quantities. iv. Part ll (except for Parts II.A.1, II.B.3, ILB.8, and LLB] 0): Specifically includes, but is not limited to, provisions applicable in the case of noncompliance with permit requirement, and requirements to provide information and access. B. Stormwater Management Plans (SWMPs) Prior to commencement of construction, a stormwater management plan (SWMP) shall be developed and implemented for each facility covered by this permit. 4 certification that the SWMP is complete must be submitted with the permit application. The SWMP shall identify potential sources of pollution (including sediment) which may reasonably be expected to affect the quality of stormwater discharges associated with construction activity from the facility. In addition, the plan shall describe the best management practice (BMPs) which will be used to reduce the pollutants in stormwater discharges from the corutruction site. Facilities must implement the provisions of their SWMP as a condition of this permit. The SWMP shall include the following items: 1. Site Description 2. Site Map 3. BMPs for Stormwater Pollution Prevention 4. Longterm Stormwater Management 5. Other Controls 6. Inspection and Maintenance 7. Signatory Requirements and Availability 8. SWMP Review/Changes (See Part 1.3. of the permit for a more detailed description of SWMP requirements.) r = L--:. .,.:):\7‘_'�'�.7, R::e �o'::ro Tiv:. or. _ _. v�1+ .'7JONS C: ?�fJ✓•� (car: r ?errni: -P3,aen responsibility for stormwater discharges ata construction sire changes from one individual to another, the permit shall be transferred in accordance with Part I.A.7 of the permit, The Notice of Transfer form will be mailed to rye permiriee along with the permit cerriitcan'on. Addi:ionil copies are available from the Division. y'ura.ion of _Permit The general permit will expire on June 30, 2007. The permitree's authority to discharge under this pernv is approved • :he expiration date of the general pern:ir. Any per -mime desiring continued coverage under the general permit rubs: apply for recertification under the general permit at least 90 days prior to its e piration dare. Nathan Moore March 11, 2002 Page 2 of 17 Permit No. COR -030000 CDPS GENERAL PERMIT STOR\1WATER DISCHARGES ASSOCLkTED WITH CONSTRUCTION ACTIVITY AUTHORIZATION TO DISCHARGE UNDER THE COLORADO DISCHARGE PERMIT SYSTEM 1n compliance with the provisions of the Colorado Water Quality Control Act, (25-8-101 et seq., CRS, 2 973 as amended) and the Federal Water Pollution Control Act, as amended (33 U.S.C. 1251 et seq.; the "Act"), this permit authorizes the discharge of stormwater associated with construction activities certified under this permit, from those locations specified throughout the State of Colorado to specified waters of sae State. Such discharges shall be in accordance with the conditions of this permit. This pem t specifically authorizes the facility listed on page 1 of this permit to discharge storrnwater associated with construction activity, as of this date, in accordance with permit requirements and conditions set forth in Parts I and II hereof. All discharges authorized herein shall be consistent with the -ms and conditions of this permit. This permit and the authorization to discharge shall expire at midnight, June 30, 2007. Issued and Signed this day of COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT J. David Holm, Director Water Quality Control Division F. CONTENTS con. ?A.RTII REQUIREMENTS .... 12 1. Change in Discharge 12 Special Not:a,La Lions - Defmiaons .... 12 3. Noncompliance Notification 13 c. Submission of Incorrect or Incomplete Information 13 5. Bypass 13 6. Upsets 13 7. Removed Substances 14 R. Min m3zation of Adverse Impact 14 P. Reduction, Loss, or Failure of Treatr.^.ent Facility 14 '. 0. Proper Operation and Maintenanc- 14 RESPONSJBILITIES 14 1. Inspections and Right to Entry 14 2. Duty to Provide Information 15 Transfer of Ownership or ConoL 15 4. Modification, Suspension, or Revocation of Permit By Division -15 5. Permit Violations 16 6. Legal Responsibilities 16 7. Severability 16 S. Renewal Application 17 9. Confidentiality 17 10. Fees 17 . 11. Requiring an Individual CDPS Permit 17 -2b- PART 1 Page 4 Permit No. COR -030000 UNDER -f%S Pl . LM:L (cont,) c) Permit Coverage Termination: When a site has been finally stabilized, coverage under this permit is automatically terminated. d) Compliance with Qualifying Local Program: A construction site operator that has authorization to discharge under this permit under Pan I.A.3 shall comply with the requirements of the Qualifying Local Program with jurisdiction over the site. el Full Permit Applicability: The Division may require any owner or operator within the jurisdiction of a Qualifying Local Program covered under this permit to apply for and obtain coverage under the full requirements of this permit. The owner or operator must be notified in writing that an application for full coverage is required. When a permit certification under this permit is issued to an owner or operator that would otherwise be covered under Par. I.A.3 of this permit, the full requirements of this permit replace the requirements as per Part I.A.3 of t1 -.,is permit, upon the effective date of the permit certification. A site brought under the full requirements of this perrm t must still comply with local stormwater rnanagerment requirements, policies or guidelines as required by Part I.C.12c of this Permit. 4. Application, Due Dates a) Application Due Dates: At least ten days prior to the anticipated date of discharge, the operator of the consa-uction activity shall submit an application fora as provided by the Division, with a certification that the Ston water Manzgernenl Plan (SWMP) is complete. One original completed discharge permit application shall be submitted, by mail or hand delivery, to: Colorado Department of Public Health and Env=ironment Water Quality Conno1 Division WQCD-P-B2 4300 Cherry Creek Drive South Denver, Colorado 80246-1530 Summary of Application: The application requires; at a minimum, the following: 1) The operator's name, address, telephone number, tax payer identification number (or employer identification number), and the status as Federal, State, private, public or other entity; 2) Name, county and location of the construction site, including the latitude and longitude to the nearest 15 seconds of the approximate center of the construction activity; 3) A brief description of the nature of the construction activity; 4) The anticipated starting date of the project and the anticipated schedule of completion 5) Estimates of the total area of the site, the area of the site that is expected to be disturbed, and the total area of the larger common plan of development or sale to undergo disturbance; 6) The name of the receiving water(s), or the municipal separate storm sewer system and the ultimate receiving water(s); 7) Certification that the SWMP for the construction site is complete (see Part I.B. below); and 8) The signature of the applicant signed in accordance with Part I.E.1 of this permit. 5. Permit Certification Procedures If the general permit is applicable to the applicant's operation, then a certification will be developed and the applicant will be authorized to discharge storrwater under this general permit. PART l Page 6 pem,it No. COR -03000D L.r'cn.P. — S nEr \ii T (con:.) a) Permit cer n_rcation number. Name, location., and county for the construction site for which the application is being submitted. c) The current perninee's name, address, telephone number and the status as Federal, State, private, public or other entity. d:. Tne new pe<r inee's name, address and telephone number and the status as Federal, State, private, public or other entity. e) Certification that the new permittee has reviewed the permit and SW] 1P and accepts responsibility, coverage and liability for the permit Effective date of transfer. S. Permit Expiration Date Authorization to discharge under this genera] permit shall expire on June 30, 2007. The Division must evaluate and reissue this general nem:it a: east once every five years and must recertify the applicant's authority to discharge under the genera] perry it a: such rime. Any permittee desiring continued coverage under the general permit must reapply by March 31, 2007. The Division will determine if the applicant may continue to operate under the terms of the general hermit. An individual permit will be required for any facility not reauthorized to discharge under the reissued general permit. 9. Individual Permit Criteria Aside. from the actin ry tyne, the Division may use other criteria in evaluating whether an individual permit is required i-ns:ead of this genera_' nermi:. This information may corne from the application, SVNI/DD, or additional information as requested by the Division, and includes, but is not limited to, the following: z) the quality of the receiv lag waters (i.e., the presence of downstream drinking water•intal es or a high quality fishery, or for preservation of high quality water); b) the size of the 'construction sire; c) evidence of noncompliance under a previous permit for the operation; d) the use of chemicals within the stot water system. In addition, an individual permit may be required when the Division has shown or has reason to suspect that the sto-rnwater discharge may cont_ibute to a violation of a water quality standard. B. CONTENTS OF THE STORvIWATER MANAGEMENT PLAN The SWIv2 shall be prepared in accordance with good engineering, hydrologic and pollution control practices. (The SWKP need not be prepared by a registered engineer.) The main objective of the plan shall be to identify Best Management Practices (BMPs) which when implemented will meet the terms and conditions of this permit (see Part I.C., below). The plan shall identify potential sources of pollution (including sediment) which may reasonably be expected to affect the quality of stormwater discharges associated with construction activity from the facility. In addition, the plan shall describe and ensue the implementation of BMPs which will be used to reduce the pollutants in stormwater discharges associated with const*uction activity. Construction operations must implement the provisions of the SWMP required under this part as a condition of this permit. The SWMP shall include the following items, at a minimum; 1. Site Description Each plan shall provide a description of the following: a) A description of the consn-uction activity. b) The proposed sequence for major activities. PART I Page S Permit No. COR -030000 CONTENTS OF TliE STORMWATER MANAGEMENT PLAN (cont.) b) Materials Handling and Spill Prevention: Tne SWMP shall identify any procedures or significant materials (see definitions at Part I.D.) handled at the site that could contribute pollutants to runoff. These could include sources such as: exposed storage of building materials, fertilizers or chemicals; waste piles; and equipment maintenance or fueling procedures. Areas or procedures where potential spills can occur shall have spill prevention and response procedures identified. Measures to control stormwater pollution from dedicated concrete batch plants br dedicated asphalt batch plants covered by this certification, must be identified in the SWMP. 4. Final Stabilization and Longterm Stormwater Management The plan shall include a description of the measures used to achieve final stabilization and measures to control pollutants in storrnwater discharges that will occur after construction operations have been completed. Final stabilization is reached when all soil disturbing activities at the site have been completed, and uniform vegetative cover has been established with a density of at least 70 percent of pre -disturbance levels, or equivalent permanent physical erosion reduction methods have been employed. For pin -poses of this permit, establishment of a vegetative cover capable of providing erosion conn•ol equivalent to pre- existing conditions at the site can be considered final stabilization. Tne permittee will be responsible for providing to the Division the documentation to make this comparison. The Division may, after consultation with the permittee and upon flood cause, amend the final stabilization criteria for specific operations. 5. Other Controls The plan shall include a description of other measures to control pollutants in stormwater discharges, including pians for waste disposal and limiting off-site soil tracking, --------- --- --. __...- 6. Inspection and Maintenance The plan shall include a description of procedures to inspect and maintain in good and effective operating condition the vegetation, erosion and sediment control measures and other protective measures identified in the SWMP. C. TERMS AND CONDITIONS 1. General Limitations The following limitations shall apply to all discharges covered by this permit: a) Stormwater discharges from construction activities shall not cause or threaten to cause pollution, contamination or degradation of State waters. ;r•.: • b), Concr`et ..wash water shall not be discharged to state waters or to storm sewer.systems.:n, ;r • c) - Bulk storage structures for petroleum products and other chemicals shall have adequate protection so as to contain all spills and prevent any spilled material from entering State waters. i y it YkY `v- I SES �41, JA"�i �-....i.':-..-....f. . 1 Gin -...J Y3y it %k l! ,. o chemtcc.a i are �to be added ° the,'lcitscharge ttFinlessipexmtssion for the use n �a apee eLcheatical is granted by s${o ma ,, the�.D%on In,granttng, the u�e of sub t chemicals special ;oz�ditrons?.nd o omg may )e addressed by separate letter ',: ..d 1K 1 ,....,...,;.s..4,111..,..., c" -E ` ,,,_ �' : p_,....,...-::,„34,-'4,,„,... r ,.'-'L The Division reserveste nght to requuc sampling aandtesting on a'case by ,case basis, in the event that there u rcasorr"to suspectthat u''', , , re with the S WNI•P is a groblern, or tonneasure the effectiveness of the BMsin rcmovzng poliutants in the �fflucia Such rnori.ttormg may include Whole Eillutut Taxrcrty testing. -j P_ -.RT 1 Page 10 Permit No. COR -030000 CONDITION` (cont.) Based on the results of the inspection, the description of potential pollutant sources, and the pollution prevention and control measures that are identified in the SWNJP'shal] be revised and modified as appropriate as soon as practicable after such inspection. Modifcations to control measures shall be implemented in a timely manner, but in no case more than 7 calendar days after the inspection. 3) The operator shall keep a record of inspections. Uncontrolled releases of mud or muddy water or measurable quantities of sediment found off the site shall be recorded with a brief explanation as to the measures taken to prevent future releases as well as any measure taken to clean up the sediment that has left the site. This record shall be made available to the Division upon request. b) Completed Sites - For sites where all construction activities are completed but final stabili .ation has not been achieved due to a vegetative cover that has been planted but has not become established, the permittee shall make a thorough inspection of their stormwater management system at least once every month. When sire conditions make this schedule impractical, permittees may petition the Division to grant an alternate inspection schedule. These inspections must be conducted in accordance with paragraphs 3), 2), and 3) of Part I.C.S.a. above. c) Winter Conditions - Inspections, as described above in a) and b), will not be required at sites where snow cover exists over the entire site for an extended period, and melting conditions do not exist. This exemption is applicable only during the period where melting conditions do not exist. Regular inspections, as described above, are required a: all other rues. 6. Reportinz No regular reporting requirements are included in this ne:rnit; however, the Division reserves the right to request that a copy of the inspection reports be submitted. SW -M=P Submittal Upon Reouest Upon request, the perrninee shall submit a copy of the SW-IviP to the Division, EPA or any local agency in charge of approving sediment and erosion plans, grading plans or stormwater management plans. All SWMPs required under this permit are considered reports that shall be available to the public under Section 30$(b) of the CWA. The owner or operator of a facility with stormwater discharges covered by this permit shall make plans available to members of the public upon request, unless the SWMP has been submitted to the Division. However, the permittee may claim any portion of a SWMP as confidenrial in accordance with 40 CFR Pan 2. D. ADDITIONAL DEFLNITIONS For the purposes of this peanut: 1. BAT and BCT: (Best Available Technology and Best Conventional Technology) Technology based federal water quality requirements covered under 40 CFR subchapter N. 2. Best management practices (BMPs): schedules of activities, prohibitions of practices, maintenance procedures, and other management practices to prevent or reduce the pollution of waters of the State. ]3MPs also include treatment requirements, operating procedures, and practices to control site runoff, spillage or leaks, waste disposal, or drainage from materia] storage. 3. Dedicated asphalt plants and concrete plants: portable asphalt plants and concrete plants that are located on or adjacent to a consuuction site and that provide materials only to that specific construction site. PA.FIT I Past 12 Permit No. COR -030000 (:.on:.) 4 In the case of a municipal, state, or other public facility, by either a principal executive officer, ranting elected official, or other duly authorized employee. b) Changes to authorization. Nan authorization under paragraph a) of this section is no longer accurate because a Li-L.—rat individual or position has responsibility for the overall operation of the facility, a new authorization satisfying the requirements of paragraph a) of this section must be submitted to the Division, prior to or together with any reports, information, or applications to be signed by an authorized representative. c) Certification. Any person signing a document under paragraph a) of this section shall make the following certification: "1 certify under penally of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the bes: of rnv knowledge and belief, trot, accurate, and complete. Iain aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for lahowing violations." Retention of Records a) The. pe::n.inee shall retain conies of the SWMP and at reports required by this pen -nit and records of all data used to complete the application to be covered by this permit, for a period of at least three years from the date that the site is n.nally stabilized_ b) The permittee shall retain a copy of the SWMP required by this permit at the construction site from the date of project initiation to the date of final stabilization, unless another location, specified by the permittee, is approved by the Division. PART II MANAGEMENT REQU] EMENTS 1. Chancre in Discharge The pe•~rnai.rtee shall inform the Division (Permits Unit) in writing of any intent to siQnificantly change activities from those indicated in the permit application (this does not include changes to the SWMP). Upon request, the permittee shall furnish the Division with such plans and specifications which the Division deems reasonably necessary to evaluate the effect on the discharge and receiving stream. The SWMP shall be updated within 30 days of the changes. The permittee shall submit this notice to the Division within two weeks after making a determination to perform the type cf activity referred to in the preceding paragraph. Any discharge to the waters of the State from a point source other than specifically authorized by this permit is, prohibited. Special Notifications - Definitions a) Spill: An unintentional release of solid or liquid material which may cause pollution of state waters. b) Upset: An exceptional incident in which there is unintentional and temporary noncompliance with permit effluent limitations because of factors beyond the reasonable control of the permittee. An upset does not include noncompliance to the extent caused by operational error, improperly designed treatment facilities, inadequate treatsent facilities, lack of preventative maintenance, or careless or improper operation. 1I Page 34 Pe. -mit No, COR-D3DODD LTi',,-'vfEl _ S (con . 4) The permute: complied with any remedial measures required under Section 122,7(d) of the federal rr. guianors. c) Burden of Proof In any enforcement proceeding the permittee seeking to establish the occurrence of an upset has the burden of proof. 7. Removed Substances Solids, sludges, or other pollutants removed in the course of treatment or control of wastewaters shall be properly disposed of in a manner such as to prevent any pollutant from such materials from entering waters of the'State. &. 'Minimization of Adverse Impact The permittee shall take al] reasonable steps to minimize any adverse impact to waters of the State resulting from noncompliance with any eluent limitations specified in this permit, including such accelerated or additional monitoring as necessary to determine the nature and impact of the noncomplying discharge. 9. Reduction. Loss. or Failure of Treatment Facility Tot permittee has the duty to halt or reduce any activiry if necessary to maintain compliance with the permit requirements. Upon reduction, loss, or failure of the treatment facility, the permittee shall, to the extent necessary to maintain compliance with its permit, control production, or all discharges, or both until the facility is restored or an alternative method of ueat;nent is provided. It shall not be a defense for a peens ree in an enforcement action that it would be necessary to halt or reduce the permitted activity, in order to maintain compliance with the conditions of this pe_ -mit. 10. Proper Operation and Maintenance The permittee shall at all times properly operate and maintain all facilities and systems of treatment and control (and related appurtenances) which are installed or used by the permittee to achieve compliance with the conditions of this permit. Proper operation and maintenance includes effective performance, adequate funding, adequate operator staffing and training, and adequate laboratory and process controls, including appropriate quality assurance procedures. This provision requires the aper anon of back-up or auxiliary facilities or similar systems only when necessary to achieve compliance with the conditions of the permit. �. RESPONSIBII.i 11ES 1. Inspections and Right to Entry The permittee shall allow the Director of the State Water Quality Control Division, the EPA Regional Administrator, and/or their authorized representative, upon the presentation of credentials: a) To enter upon the permittee's premises where a regulated facility or activity is located or in which any records are required to be kept under the terms and conditions of this permit; b) At reasonable times to have access to and copy any records required to be kept under the terms and conditions of this permit and to inspect any monitoring equipment or monitoring method required in the permit; and c) To enter upon the permittee's premises to investigate, within reason, any actual, suspected, or potential source of water pollution, or any violation of the Colorado Water Quality Control Act. The investigation may include, but is not limited to, the following: sampling of any discharge and/or process waters, the taking of photographs, interviewing permittee staff on alleged violations, and access to any and all facilities or areas within the permitter's premises that may have any effect on the discharge, permit, or alleged violation. PART i Paze 16 perrri: COR -030D00 This pe: -nit; or cera_}cation under this perinit, may be modified in whole or in part to include new effluent 1-- iT.arions and other appropriate condlzions where data subnur:edpursuant to pari 1 indicates that such effluent limitations and conditions are necessary to ensure compliance with applicable water quality standards and Protection of classified uses. C) At flit' request of the permittee, the Division may modify or inactivate certification under this permit if the following. conditions art met: 1) in the case of inactivation, the permittee notifies the Division of its intent to inactivate the certification, and- ce tifies that the site has been finally stab' »ed; 2) in the case of inactivation, the permittee has ceased any and all discharges to state waters and demonstrates to the Division there is no probability of ,further uncontrolled discharges) which may affect waters of the State. 3) The Division finds that the permittee has shown reasonable grounds consistent with the Federal and State statutes and regulations for such modification, amendment or inactivation; 4) F requirements of Section 61.15 of State Discharge Pet -:frit System. Regulations have been met; and 5) Requirements of public notice have been met. For shall consn-uction sites covered by a Qualifying Local Program, coveraee under this permit. is automatically terminated when a site has been rinaliy stabilized. 5. Permit 'Violations Faillze to comply with any it= andlor conditions of -his nermit shall be a violation of this permit. Dischareers of stormwater associated with indust-ial activity, as defined in the EPA Stormwater Regulation (40 CFR 122.26(b)(14), which do not obtain coverage under this or other Colorado general permits, or under an individual CDPS permit regulatin9. industrial stonnwater, will be in violation of the federal Clean Water Act and the Colorado Water Quality Control Act, 25-8-101. Failure to comply with CDPS permit requirements will also constitute a violation. Civil penalties for such violations may be up to 510,000 per day, .and criminal pollution of state waters is punishable by fines cf up to 525,000 per day. 6. Legal Responsibilities The issuance of this permit does not convey any property or water rights in either real or personal property, or cream flows; or any exclusive privileges, nor does it authorize any injury to private property or any invasion of personal rights, nor any infringement of Federal, State or local laws or regulations. Nothing in this permit shall be construed to preclude the institution of any legal action or relieve the perrn7ittee from any responsibilities, liabilities, or penalties to which the peru nee is or may be subject to under Section 311 (Oil and Hazardous Substance Liability) of the Clean Water Act. 7. Severability Tne provisions of this permit are severable. if any provisions of this permit, or the application of any provision 07-11135 pennit to any circumstance, is held invalid, the application of such provision to other circumstances and the application of the remainder of this permit shall not be affected. STORM WATER MANAGEMENT PLAN EnCana Oil & Gas (USA) Inc. INTRODUCTION This Storm Water Management Plan (SWMP) has been prepared for various oil and gas drilling, completion and producing locations within the field provided above 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 Public Health and Environment (CDPHE). This 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 area disturbance greater than 1 acre (43,560 fl2. PROJECT DESCRIPTION EnCana Oil & Gas (USA) Inc. is constructing or has constructed various facilities (See Appendix A) associated with oil & natural 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 stormwater control; • Remove and stockpile topsoil , grade and compact the project areas level, and clear and grade right-of-way; • Excavate reserve pit, and/or ROW; • Move in drilling or construction equipment; • Remove all equipment and move in completion equipment to complete well; • Remove all completion equipment and install semi-permanent production equipment; and • 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 covered under this SWMP. The runoff coefficients for the locations within project area are expected to vary between 0.10 to 0.30 and are not expected to change significantly following construction. The project areas ranged from flat unimproved rangeland to mountainous areas with steep slopes. Themost common substances that could be spilled within the project area are: 1) fuel and lubricants for construction equipment and vehicles; 2) water or gel based frac fluids (surfactant, friction reducer, acid, potassium chloride) used during completion; 3) produced water; and 4) produced crude oillcondensate. 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 water drainage from the various facilities will be the Colorado River located approximately 4 miles north of the center of the field. SITE MAPS A topographic map of the project area showing the locations of the facilities covered under this plan is presented as Figure 1. 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 Slope Diversion Spacing (Feet) 5-15% 300 16-30% 200 30+ % 100 2. Implementation of Structural Practices a. Construction sites may utilize vegetative filters, brush dams, 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 Iarge 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. c. Excavated surface materials will be utilized as backfill when practicable. An exception may be some rock excavated by blasting. In these areas, some select backfill may be 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 dams 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, streams, 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, such 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 fluming 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, compacted 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 construction 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 I. Reclamation a. Unless otherwise directed by the Iandowner 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 project 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 tinned 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 I 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. STORMWATER MANAGEMENT PLAN MAMM CREEK TO PUMBA PIPELINE LOG Information to be included: • Records of spills, leaks, or overflows, including time and date, weather conditions, etc. • Implementation of specific items in the SWIvIP • Training events • Events involving materials handling and storage • Contacts with regulatory agencies and personnel • Notes of employee activities, contact, notifications, etc. • Maintenance and repair of stormwater management controls • Preventative maintenance activities • Inspection activities