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HomeMy WebLinkAbout3.0 Gould - BMPs and SWMP• )~ FivF-~ f11v111~~ :P--A+o GOULD CONSTRUCTION TABLE OF CONTENTS Construction Yard 5033 CR 154 SECTION 1 ..................................................................................................... . D ETA IL ED D ESCRIPTION OF EX ISTING USES ................................................... 2 SECTION 2 ..................................................................................................... . SITE SURVEY .............................................................................................. 3-4 SECTION 3 ..................................................................................................... . SITE PLAN ...................................................................................................... 5 SECTION 4 ..................................................................................................... . STORM WATER MANAGEMENT PLAN ......................................................... 6-23 SECTION 5 ..................................................................................................... . APPENDIX ............................................................................................ 24-25 A . General Permit-Storm Water Discharges Associated with Construction Activity Certification and Genera l Requirements(25-69) B. Site Map and Location(70-71) C . Typical Best Management Practice s and Erosion Control Details (72-109) D. Construction Storm water Pollution Prevention Spill Report Form ( 110-111) E. Field Inspection and Corrective Act io n Report Forms(112-117) GOULD CONSTRUCTION Construction Yard 5033 CR 154 SECTION 1: Detailed Description of Existing Uses Gould Construction operates a construction yard at 503 3 CR 154 south of Glenwood Springs . The site is approximately 2.446 acres and is used to stage construct ion related items including but not limited to dirt, rock, topsoil, blocks, equipment, vehicles, trailers, ti res , supplies , and anything that can improve the effectiveness, efficiency, and operational economies of Go uld Cons t ruction . Along with staging, the site is also used for crushing and recycling rock, aggregates, concret e, asphalt, and dirt. The site is used to screen dirt, rock, aggregates, topsoil, and other organic materia l. The site is used to store wood, which can be chipped , cut for fire wood, or burned on site per local fire regulations. Maintenance of equipment including but not limited to oil changes, fueling , la rge rep ai rs, welding, tire replacement, is conducted on site. Composting is used on site in order to reuse mate rials. Trash is collected in a dumpster, and _ there is a portable sani t ary facility, both of which are cleaned regularly. At the discretion of the property owner, cuts, fi lls, and re-grading can be done in o rder to improve the property for the property owner as well as for the efficiencies of the construction ya rd . Proper permitting is used when this is the case. None of the previously listed activities happen on a regular time schedule, they are only done on an as needed basis . Due to the spread out time frame of t hese activities, different areas of the yard can be used for any activity that is required . Space, noise, du st, mud, and end use are some of the factors that determine where on the site these activities will occ ur. In addition, because the site is less than three acres, maintaining assigned areas of operation is m o re or less impossible . The construction yard lay-out is based on the present needs of the yard area as well as the activities that are required. While the purpose of this construction yard is to serve the best i nterests of Gould Construction, its clients, and the property owner, it is also in the best interest of the community. The uses at the property do not have any negative impacts on local residents. The positives include reuse of construction waste (dirt, rock, trees, etc.), reduction of unsightly construction type materials at other properties throughout the valley, reduction in trips to the landfill with large trucks, i nc reased efficiencies for the contractor allow for better prices to the owner (i.e . tax payers), and this property is mostly out of site for the vast majority of the general public. P.O. Box 130, Glenwood Springs, CO 81602 Phone: 970-945 -7291 Fax: 970-945-8371 GOULD CONSTRUCTION Site Survey SECTION 2: Construction Yard 5033 CR 154 Glenwood Springs, Colorado January 22, 2014 The 2.446 acre site was surveyed prior to occupancy by Gould Construction, by Registered Land Surveyor M . Darrell White. A copy of Mr. White's sealed survey as relates to the si t e is enclosed . The survey depicts the site's configuration and boundaries. The site remains unchanged. No enlargements or reductions in the size or dimensions of the site have taken place during Gould Construction's occupancy from 1997 to the present. Monuments are in place reflecting the boundaries of the site . ~ i- l i· '. --··:. ------------601 R()AD RIGHT OF WAY N. a4• 22' os· f. 757.84' ~ 1?041?1~<1 R1-yE'f? ---------·. ----.... ----- SCALE: 1•= 100' J4 R % 1066 200 / '--~ > / 2.445 · ACBfS ~ ~~-.---,----:------------ MOBILE''·PREMIX COMPANY GRAVEL · LEASE .. (JAM/ir1ARON) -- °<·o \l' ·.,,. ..... SECTION 35, T. 6 S, R. 89 . W . of 6th P. M. iJ' •• l ~- "'.s--. ~ GARFIELD CCXJNTY, COLORADO "°o o.,. ·~ .. A p.u-ccl uf l.an:! located In th~ 11tsr: uf . :.Cctlun )5, Tuvnshlp 6 South, R:inge 69 llcst uf .the 6t,.'" Principal Y.erld!an, In Wf~ald County, Coluro.du lying no~thcr!y uf the Roaring f'u:k River, swthcrly uf a 60 foot ro.1d rlght-uf-v:iy, arc ""•terly uf the lleRu.;ck property, 11or:e part!cu larly descr1'oed ;., fulluwsi B•ginning at a polnt whcr.ce a 9rass Cap found ln place fur the 5wthc'1st corner of Sectlu ~ )~. T. 6 S.; R.ini;c !:!9 \/, uf the 6t~ !'. H. t-cars s. IW• 4)' 56 .. f. 2ClCl'.o.?l :-ee~; thence II, 7}0 24' 4J'' 11. 14}. ~! feet; thence Ii. 69" 2)1 47 .. II, 2J5,5! feet; thence II, 600 )2' 59 ;. II, ]4] ,00 fr~l; thence N. 74° 22' ·12· II, l26.IJ7 ·feet; thence II, 75° 57' 05 .. II. 82,65 !'ce~; thence Ii, €11° 22' 05 .. F. 757 • .,,. feet; then"" S. 57° 02' 15 .. F. <]0,4] feet: thence s.· JJ• 25• _56" \/, 264.)2 feet tu tile pu!ot u.f beginning. . The above descr1bed parcel u!' la.rod cont..alr.s 2,4.46 acres, .. •o:-e or le:J s. · . !'i.Jrvcyed by r -p11Lnw1<.//,·;:;-~ Reglstcr~d L.,r,1. ~rveyur ?3.?7 . lla.rc!l 22. 19€11 . )~ BRASS CA; "'° SE: COR. SE:C. J~ I I I I .. ·"' \ ... \ ' ' \ '-...I . I ~ Cf) O> c c !..... 0 0.. +:i Cf) (.) "'O :::J 0 !::; 0 en ~ c c 0 Q) u (.9 \ \ \ .) \ / '',i 1··,· f ... ~ :·.' ; '. !:· '.!11:' ·.:.v~·:,t ' ' : ·' :l r I' I:· / ". \' ' '\''-I ' ,··yl .,, . ..t , •t ,t . . •.' ··'!: (/\ ?; ~ <.. OJ o8 c.tJ c:: Qi ':><.. (l) 11 _t:. =8 I c,,. 1 c ~ 0 "J I t ,, •• .. " i I I Gale D. Carmoney Code Enforcement Officer Community Deve lopment Garfield County Administration Building 108 Eighth Street Suite 401 Glenwood Springs, CO 81601 RE: Gould Construction Stormwater Management Plan SE Job# 14006.01 January 24, 2014 As requested, Sopris Engineering professional staff has reviewed the plan dated January 2, 2014 and our opinion is that the plan appropriately addresses and implements all required elements to protect the river. In light of the uses and physical features of the site the management plan outlines Best Management Practices (BM P's) for compliance with state and county regulations. If you have any questions or need additional information please give me a call. Sincerely, Yancy Nichol, P.E. Principal 502 Main Street • Su i te A3 • Carbondale, CO 81623 • (970) 704-0311 • Fax (970 ) 704-0313 SOPRIS ENGINEERING • llC civil consultants CONSTRUCTION Section 4 Stormwater Management Plan Construction Yard 5033 CR 154 Glenwood Springs, Colorado January 2, 2014 TABLE OF CONTENTS Site Name Page ..................................................................................................... 1 Site Location .................................................................................................. I Permitees' Name, Address, and Local Contact. ..................................................... ! 1.0 Permit Information ................................................................................. 2 2.0 General Site Description .......................................................................... 2 2.1 Description of Activities ............................................................................ 2 2 .2 Hydrology ............................................................................................. 3 2.3Soils .................................................................................................... 4 2.4 Vegetation ........................................................................................... 4 2.50ther Potential Pollutant Sources ............................................................. 4 2.6Receiving Waters ................................................................................. 6 3.0 Site Map .............................................................................................. 6 4.0 BM P's For Storm Water Pollution Preven ti on .............................................. 6 4.1 Erosion and Sediment Controls ............................................................... 7 4.1.1 StructuralBMPs ........................................................................... 8 4.1.2 Nonstructural BMPs ...................................................................... 9 5.0 Summary of Erosion and Sediment Control Strategy ................................... 10 5.1 Materials Handling and Spill Prevention ................................................... 10 5.2Spill Prevention and Response ............................................................... 11 5.2.1 Material Management Practices ...................................................... 11 5.2.2 Good House Keeping .................................................................. 11 5 .3 Product Specific Practices ..................................................................... 12 5.4 Flammable and Combust ible Liquids and Hazardous Materials .................... 12 5.5 Petroleum Products .............................................................................. 12 5.6 Spill Control and Cleanup ..................................................................... 13 5. 7 Spill Reporting ..................................................................................... 14 6.0 SWMP Modification Procedures Related to Reportable Releases ................... 14 7.0 OtherControls ..................................................................................... 14 8.0 Inspection and Maintenance .................................................................. 15 Appendix A General Permit-Storm water Discharges Assoc iate d with Construction Activity-Certification and General Requirements B Site Map and Location C Typical Best Management Practices and Erosion Control Details D Construction Storm water Pollution Prevention Sp ill Report E Field Inspection and Corrective Action Report Forms SITE NAME STORMWATER MANAGEMENT PLAN FOR CONSTRUCTION YARD ON CR154 Gould Construction , Construction Yard 5033 CR 154, Glenwood Springs, CO SITE LOCATION The Construction Yard (Site) is located appro xi mately .27 miles south of the CR 154 and HWY 82 intersection . It is between CR 154 and the Roaring Fork River . The intersection is approximately 2 .25 miles south of Glenwood Springs. The site 's physical address is 5033 CR 154, Glenwood Spring s, CO . The approximate latitude and longitude of the project are 39 °28 '59.68"N a nd 107 °17'32.44"W, respectively . The project vicinity and the general site map are show n on the attached draw ings . PERMITTEES' NAME, ADDRESS, AND LOCAL CONTACT Owner (Permittee): Gould Construct ion P .O. Box 130 Gould Representative Glenwood Springs , CO 81 6 02 Phone: 970-945-7291 Fax : 970-945-8371 Gould Construct ion Attn : Mark Gould Jr P.O. Box 130 Glenwood Springs , CO 81 602 Phone: 970-945 -7291 Fax: 970-945-8371 1.0 Permit Information Gould Construction applied for a permit in November 2013 from the Colorado Department of Public Health and Environment (CDPHE) for stormwater discharges associated with construction ya rd activity for the site. The permit certification and general requirements are included in Appendix A. This SWMP covers construction yard activities for the entire site, not limited to soil screening, rock, concrete, an d asphalt recycling, as well as storage of any and all equipment and materials involved in the civil construction industry. These activities involve handling soil, rock, and aggregates that prohibit re-vegetation and can generate dust and mud which is why erosion and sediment control measures are required . Controls for construction equipment storage tha t have the potential to release unwanted chemicals to the surface water are also addressed in this SWMP. This SWMP identifies and describes stormwater management best management practices (BMPs) that are implemented for stormwater control. 2.0 General Site Description The construction yard is located below CR 154 and approximately 25 feet above the Roaring Fork River. An asphalt entrance, ramps down from CR 154 to the open flat area below. The entire length of the site parallels the river. The river bank consists of 18" to 24" rip rap bank stabilization, and natural ly occurring willows. The total site area is reported at 3 acres. There are two property owners adjacent to subject property. The property to the south is also a construction yard and is above the Gould site. The property to the north is roughly at the same elevation as the Gould site . This SWMP covers discharges related to stormwater runoff only. Dewatering discharges do not occur on this site. 2.1 Description of Activities Work performed on this site includes importing and exporting soil, rock , aggregates , and woods. Often these materials are resized by screening , chipping, grinding , or by 2 crushing to make them usable on Gould Con struction's civil projects. The soils, rock , aggregate, and wood are usually in piles , in order to consolidate the area that these materials take up. Certain materials that will not be used immediately are allowed to vegetate, creating temporary stabilization of th e affected area . Construction activities (such as those covered by this SWMP) typicall y require the use of heavy earthmoving equipment, dump trucks , concrete mixers , portable generators , welding and cutting equipment , and other small equipment. Thi s equipment is stored and sometimes maintained on the property. This site will be inhabited by Gould Const ructio n for the foreseeable future. The existing conditions of the property have minor modificat ion s to allow for the most efficient use of the acreage . Upon vacating the property , existi ng conditions will be restored. 2.2 Hydrology The construction yard is adjacent and higher in elevation to the Roaring Fork River , which flows from south to north. The Roa rin g Fork River has several tributaries upstream of the site including the Frying Pan , and the Crystal River. There is the potential for storm water run on to the site. Th is comes from the county road and from the adjacent property to the south. The county ro ad is sloped in a north to south fashion that parallels the property . This allows for storm water to run down the road to the south and by pass the construction yard . The south pro perty is graded in a fashion that does not allow water to run onto the Gould Con st ruction yard. The northern adjacent property has barrow ditches that prohibit storm water from entering the construction yard. 3 2.3 Soils 1 ' The site consists of moderately sloped and somewhat irregular terrain down from CR 154 . The Grade is relatively flat and gently slo pi ng near the river . The material storage area consists of compacted aggregate , crushed rock, and some asphalt paving. 2.4 Vegetation Vegetation is sparse on the property's slopes , a nd consists of brush and weeds . 2.5 Other Potential Pollutant Sources Many chemicals typically associated with const ruc tion activities are considered potential pollutants . Table 3 lists many of these poll uta nts . Careful handling , storage , and application of these materials reduce the likelihood that these chemicals will contribute to pollution of the environment. Preventative practices are referenced in Section 4.2 (Handling and Spill Prevention). Inclusion of a ch emical in Table 3 does not necessarily imply that the chemical will be used at the Site . Pollution potential of some chemicals may be minimized by offsite storage . 4 Table 3 Chemicals Potentially Associated with Construction Activities Potential Pollutant Sources Location Gasoline (benzene, toluene, Construction vehicles, gas cans, Through-out the site and ethylbenzene, xylene tetraethyl and generators storage area leads, methyl tertiary butyl ether [MTBE], and other compounds) Diesel fuel (and associated Heavy construction equipment Through-out the site and constituents) storage area Oil, grease, and hydraulic fluids Construction vehi c les, heavy Through-out the site and construction equipment, storage area generators, small containers, and lift equipment Glues and waterproofing Small containers and bulk Through-out the site and compounds containers storage area Fertilizers Bulk containers Through-out the site and storage area Chlorine (hypochlorite) Disinfection of water lines Through-out the site and storage area Cement Bulk conta iners Through-out the site and storage area Metals, paint chips, wood chips, Construction debris Through-out the site and insulation, asbestos , and plastics storage area Microbiological contaminants Portable Sanitary Facility Through-out the site and (coliform, giardia , etc.) storage area Glycol Construction vehicles and Through-out the site and equipment, small containers, and storage area bulk containers Tackifiers Bulk containers a nd spray Through-out the site and equipment storage area To address the relationship between construction site stormwater management and water quality of The Roaring Fork River, it is important to recognize additional factors influencing water quality. These additional factors include upstream tributaries and runoff from HWY 82 and CR154. The Roaring Fork River will be the primary receiving body of water from the construction yard. In addition to discharges from the construction yard, the Roaring Fork River receives runoff from a variety of upstream 5 sources (including other active construction si te s) and the City of Glenwood Springs , Town of Carbondale, Town of Basalt , and the City of Aspen that influence the quantity and quality of the water in the river . 2.6 Receiving Waters The Roaring Fork River is the primary receiving water for the construction yard . When construction yard activities are completed or temporarily shut down , disturbed areas will be stabilized by consolidating material, general clean-up of the area, as well as restoring and adjusting the established BMP's accordingly. 3.0 Site Map A site map is included in the appendix . Primary surface water features in the proximity of the construction yard are limi ted to the Roaring Fork River . The Roaring Fork River, the primary receiving water, will receive discharge from treated storm water from water quality control BMPs at the construction yard. A drawing has been prepared to show the in place BM P's for the construction yard and will be regularly updated to reflect BMP's and activities associated with stormwater management on the site. The site map and drawing indicates site boundaries , areas of ground disturbance , storage areas for equipment, materials, structural and non-structural BMP 's, and the Roaring Fork River. The site will not include asphalt or concrete plan ts . We are not aware of springs at the site. Due to the localized nature of this property, the drawing has been used to show the features typically included on a site map and or considered as a part of this SWMP. 4.0 BMPs for Storm Water Pollution Prevention BMPs that will be used for stormwater pollution prevention include structural and nonstructural BMPs for erosion and sediment control as well as materials handling and spill prevention measures. Section 4 .1 outlines key erosion and sediment control BMPs that may be applicable to this site. All personnel responsible for implementation and maintenance of BMPs should review and underst and the BMPs presented in Appendix B. Appendix B contains BMPs for erosion and sediment control. 6 BMPs and erosion and sediment controls are d esigned and implemented to work with the unique characteristics of the site . The deta ils in Appendix B show applicability of BMPs. 4 .1 Erosion and Sediment Controls Erosion and sediment control BMPs are inte nded to minimize the amount of soil transported to receiving waters and wetland s from areas disturbed as a result of construction activities. These BMPs are: • Temporary devices that will operating du rin g construction. • Permanen t devices after construction . • Structural BMPs include straw bales, silt fences, swales , ponds, sediment traps, surface grading, mulching , crimping , st orm sewers , drainage-ways [including roads], etc .. • Nonstructural BMPs include limiting distu rbed areas , timing the project phases to avoid heavy precipitation, soil stabilizati o n, street sweeping , maintaining buffer zones, education and outreach to produ ct ion staff and subcontractors on erosion and sediment control practices , good housekeeping , and other SWMP provisions , etc .. Three basic approaches are used for controllin g erosion triggered by stormwater runoff in construction yard as outl ined below : I. Temporary re-vegetation or surface roug hening for construction areas that must remain bare for periods of time that will pose potential soil erosion . 2. BMPs placed upstream of "significant su rfa ce distu rbances" to reduce the volume and velocity of runoff entering disturbed a reas. 3. BMPs placed below(downstream) of sig ni ficant surface disturbances to reduce the volume, velocity, and sediment load of runoff generated in disturbed areas as a result of precipitation events. 7 4.1.1 Structural BMPs Stabilized construction entrance (SCE): in place in the form of an asphalt pavement driveway . SCEs will be extended to where th e Project borders a public right-of-way, and to the points where vehicular traffic will ac ce ss the s ite while roads and utilities are under construction. The SCE will be implemented to perform as vehicle tracking control (VTC) where access to the site is already established . In addition to the SCE acting as a VTC, th e site is maintained in a manner that minimizes mud and soil tracking by using asp ha lt pavement , crushed aggregate, and clean-up of the areas that could start mud tracki ng issues . Silt fences: consist of filter fabric stretched between fence posts , with the lower edge of the filter fabric trenched and buried below th e ground surface. They are a temporary measure used on small or wide disturbed slo pes to control downslope sediment movement by reducing the velocity of runoff, fi lte ring sediment particles, and catching windblown sand and soil.. Straw wattles: t ightly wound cylindrical sedim ent control barriers that are installed in a similar manner to s ilt fence (along the contour) a nd will be used in conjunction with , or as an alternative to, silt fence . Straw-bale barriers: are made by staking straw bales in place and partially bedding them in native soil. Straw-bale barriers act as a temporary BMP and will be inspected regularly to monitor the integrity of the barriers . They will be used on side slopes and downslope of disturbed areas to slow and filter direct runoff. Straw-bale barriers will act as small check dams , promoting settling of sed iments carried by concentrated flows. They are also to be used for filtration within drain age swales and other small drainage ways . Surface roughening: It will be placed using equipment to roughen the surface of exposed soils. Surface roughening will create irregularities in the soil surface that 8 dissipate the energy of raindrops , reduce ero s ion , slow runoff velocity , and promote infiltrationO eriods. Temporary stockpile areas: are set aside to store construction materials . Piling all materials in central locations allows easier contro l of runoff from the piled materials. 4.1.2 Nonstructural BMPs Temporary seeding: of disturbed areas using a uniform fast-growing mixture such as rye grass to minimize erosion during establishm e nt of more permanent growth. It will be used in disturbed areas awaiting further constr uction or permanent revegetation. Spoil piles and topsoil stockp iles will also be tem po rarily seeded if removal or reuse is delayed. Mulching: will place grass, hay , straw, woo d chips, bark , or gravel over bare or reseeded soil surface to reduce the velocity of st ormwater runoff, hold seed, fertilizers , and topsoil in place and protect newly seeded a reas from extreme temperatures . Buffer zones: All buffer zones throughout th e si te will be vegetated at either undisturbed original growth or newly planted veg etation that are used to decrease the velocity of overland stormwater runoff. Preservation of natural vegetation: using ex is ting trees , bushes , vines , and grasses to provide natural, permanent buffer zones a nd long-term stabilization whenever possible. Stream bank stabilization: will be accompli s hed by the placement of permanent riprap , gabions , concrete, log cribbing , or aspha lt to prevent stream bank erosion due to high stormwater runoff volumes and flow rates . This work is necessary where stream banks are subject to heavy erosion from increased flows during construction or where vegetation stabilization is not practical. Street Sweeping: will be conducted on roads in and adjacent to the project area on a daily basis. 9 f ~( Cu1-r 5.0 Summary of Erosion and Sediment Control Strategy The Erosion and Sediment Control Strategy for the construction yard is to maintain existing structural and nonstructural BMP's. The SWMP will be amended as necessary to update changes that happen with the materia ls in the construction yard. 5.1 Materials Handling and Spill Prevention A copy of procedures for handling hazardous substance release and/or sp ill control provided by Gould Construction, Inc. is provided in Appendix C. 5.2 Spill Prevention and Response This section describes measures to preven t, control, and minimize impacts from a spill of chemical products (hazardous, toxic, or petroleum substances) during construction of this project. This plan identifies the handling, transportation, storage, and disposal procedures for these chemical products and outlines procedures to be followed in the event of a spill. 5.2.1 Material Management Practices Properly managing these materials on the site will greatly reduce the potential for storm water pollution. Good Housekeepi ng along with proper use and storage of these construction materials form the basis for proper management of chemical product is explained in the following articles. 5.2.2 Good Housekeeping The proper use of materials and equipmen t along with the use of genera l common sense will be implemented to all eviate the potential for contaminating storm water runoff. The following is a list of good housekeeping practices to be used during the construction project: • Fue ling of construction equipment will not be performed within 100 feet of definitive storm water drainages. • An effort will be made to store only enough products required to do the job. 10 • Materials will be stored in a nea t, orderly manne r, in appropriate closed containers, in secondary contain me nt and, if possible , under a roof or other enclosure. • Products will be kept in their origin al containers with the original manufacturer's label. • Substances will not be mixed wi t h o ne another unless recommended by the manufacturer. • Whenever possible, all products will be used up before disposing of the container. • Manufacturer's recommendation s fo r proper use of a product will be followed . • If surplus product must be disposed of, local and state recommended methods of proper disposal w ill be fo llowed. 5.3 Product-Specific Practices Due to the chemical makeup of sp ec ific products , certain handling and storage procedures w ill be established to promote the safety of pe rsonnel and prevent the possibility of pollution . Care will be taken to follow all directions and warnings for products used on the site . All pertinent in for mation can be found on the Material Safety Data Sheets (MSDS) for each produ ct. The MSDS 's will be located with each product container it represents or in a read ily accessible central location . Several product-specific practices are listed in the fo llo wing sections . 5.4 Flammable and Combustible Liquids a nd Hazardous Materials All products will be stored in tightly sealed co ntainers that are clearly labeled . The containers will be stored in secondary con t a in ment , which will be of sufficient size to contain the entire contents of the primary c ontainer plus a sufficient quantity for precipitation (a total of approximately 110 percent of the volume of the primary container). The secondary containment will be an impermeable containment basin to prevent any spills or leaks from reaching t he ground . The containment may be one of the following or other means that mee ts the definition of impermeable : 1) a temporary earthen berm lined with 20-ml pla sti c , 2) a portable tank or basin , or 3) a galvanized steel trough. 11 After each storm event, all secondary containment areas will be inspected . If there is no visible sheen on the collected water, it ca n be pumped or drained to the ground in a manner that does not cause scouring. If s heen is present , it must be cleaned up using absorbent materials prior to discharging or disposing of the water. The absorbent ma terial will be disposed of properly. 5.5 Petroleum Products In addition to the requirements above petroleum products are required to have some additional procedures for handling and storage to prevent the possibility of pollution. On-site vehicles will be monitored for leaks and receive regular maintenance to reduce the po tential for leakage. Bulk fuel or lubricating oil dispensers will have a valve that must be manually held open to allow the flow of fuel. When not in use, the fuel dispensing nozzles and/or associated hoses will be kept inside the containment basin . During fueling operations, personnel will be present at all times to detect and contain spills . If any spills or leaks occur, the activity will be stopped immediately, and the containment and cleanup will begin immediately . In addition, the contractor will follow the procedure listed in Section 6.4 . 5.6 Spill Control and Cleanup In addition to the material management p ractices, the following spill control and cleanup practices will be followed to prevent storm water pollution in the event of a spill. • Spills will be contained and cleaned up immediately after discovery . • Manufactu rer's methods for spill cleanup of a material will be followed as described on the materia l's MSDS. • Materials and equipment needed for cleanup procedures ("spill kits") will be kept readily available on the s ite, either at an equipment storage area or on contractor's trucks. Equipment to be kep t on the site may include but is not limited to brooms, dust pans, shovels, granular absorbents, sand, sawdust , 12 absorbent pads and socks , plastic and metal trash containers, gloves , and goggles. • Drums containing used cleanup material s wi ll be labeled with the contents and date. • Personnel on the site will be made aware of cleanup procedures and the location of spill cleanup equipment. In general , eve ry vehicle with bulk fuel or petroleum lubrication supplies will be outfitted with a s pill conta inment and cleanup kit. • The contractor will be responsible for all cle anup activities in accordance with applicable local , state, and federal regula ti ons . 5.7 Spill Reporting If there is a spill of antifreeze , gasoline or o ils from personal vehicles , it does not need to be reported, but will be documented and kept with the master SWMP . All spills should be documented using the "Sp ill Report " form provided in Appendix D and a record kept with the maste r SWMP . Copies of the forms can be found in Appendix D. 6.0 SWMP Modification Procedures Relate d to Reportable Releases If a reportable release occurs, a modificati on to the SWMP will be made within 14 days . The modification will include : a de scription of the release , the date of the release, an explanation of why the spill ha ppened , a desc ription of procedures to prevent futu re spills and/or releases from hap pening , and a description of response procedures if a spill or release occurs agai n and within 14 days of the release. A written description of the release will be s ub mitted to the permitting authority that includes : a description of the release , includi ng the type of material and an estimated amount of spill , the date of the release ; an explanation of why the spill happened ; and a description of the steps taken to prevent and control future releases . 7 .0 Other Controls 13 Additional provisions relating to waste disposal and BMP inspection and maintenance include: The contractor shall remove in a timely manner sediment, mud, and construction debris that may accumulate in the flow line s and public rights-of-way as a result of the site activities . The owner and designated agents shall assure that loads of cut and fill material imported or exported from the site shall be properly covered to prevent loss of the material during transport on public rights-of-way. Vehicle tracking control shall be required at access locations of the Project site to prevent tracking debris off site before street paving is complete. BMPs for erosion and sediment control sha ll be properly inspected and maintained throughout the duration of the constructi on activity to a level where BMP performance is not compromised . 8.0 Inspection and Maintenance The designated representative should ins pect temporary erosion and sediment control measures associated with construct ion at least bi-weekly and after major storm events (storm events that causes surface erosion). The CDPHE Storm water General Permit requires inspections once every two weeks and following a runoff producing event. The inspector will maintain an inspection log to document conditions of erosion and sediment con t rol measures. Maintenance /repair of BMPs will occur on an as - needed basis and in a timely manner . Gould Construction has designated Brett G o uld as its authorized representative to perform storm water site inspections and to sign storm water inspection reports. Field Inspection Report forms and Correcti ve Action Report fo rms are provided in Appendix. Any deficiency noted during a storm -even t inspection or routine inspection that appears to represent a substantial threat to th e environment or to the human health and safety will be reported to a supervisor re s ponsible for the remediation . In these 14 • cases , an interim remedy will generally be necessary to stabilize the situation and minimize adverse impacts. The COPS requires amendments to the SWMP under certain circumstances. For example, the SWMP must be amended if there is a change in the design , construction, operation, or maintenance at the site that has or could have a significant effect on discharge of pollutants to surface water. The SWMP must be amended if regulatory officials inspecting t he si te determine that the SWMP is ineffective in eliminating or significantly mi ni mizing pollutants in storm water . The SWMP also must be amended within seven days if any routine inspection indicates that additional or modified BMPs are needed at the construction site . Such additional or modified BMPs must be implemented before the next storm whenever practical. (If not practical , th e situation must be documented and alternative BMPs must be imple me nted as soon as practical. 15 >< ·-"'C c: Cl) c.. c.. <C Appendix A General Permit-Storm wate r Discharges Associated with Construction Activity-Certification and General Requirements STATE OF COLORADO John W. Hlckenlooper, Governor Larry Wolk, MD, MSPH Executive Director and Chief Med ical Olficer Dedicated to protecting and Improving the health and environment of the people of Colorado Laboratory Services Division 8100 Lowry Blvd. Denver, Colorado 80230-6928 (303) 692-3090 www.colorado.gov/cdphellab Mark Gould Jr, Pres Gould Construction Inc PO Box 130 Glenwood Springs, CO 81602 DATE: 12/24/2013 MEMO RE: Certification, Colorado Discharge Permit System Permit No., COR030000, Certlflcatlon Number: COR03L569 Colorado Department of Public Health and Environment DIVISION CONTACTS: Lillian Gonzalez, Environmental Protection Specialist, at 303-3655, or Karen Harford, Ad min, at 303-691-4019 ATTACHMENTS: Certification COR03L569, General Permit, Highlight Shee t , Inact ivation form The Water Quality Control Division (the Division) has reviewed the appli cation submitted for the Gould Construction Lower Yard Lease facility and determined that it qualifies for coverage under the COPS General Permit for Stormwater Discharges Associated with Construction Activities (the permit). Enclosed please find a copy of the permit certification, which was issued under the Colorado Water Quality Control Act. FEE INFORMATION: The Annual Fee for this certification Is $245.00 [category 7, sub cat 9 -Stormwater Construction per CRS 25-8-502) Is Invoiced every July. Do Not Pay This Now. The Initial prorated Invoice will be sent to the legal contact shortly. CERTIFICATION RECORDS INFORMATION: The following Information Is what the Division records show for this certification . For any changes to Contacts -Legal, Facility, or Billing-a "Noti ce of Change of Contacts form" must be submitted to the Division . This form is al so available on our web site and must be signed by the legal contact. Faclllty: Gould Construction Lower Yard Lease GarfleldCounty Construction Activities Construction Yard Legal Contact (receives all legal documentation pertaining to the permit certification): Mark Gould Jr, Pres Phone number: 970-379-8326 Gould Construction Inc Email : markjr@gouldconstructlon.com PO Box 130 Glenwood Springs, CO 81602 . Facility Contact (contacted for general inquiries regarding the facility): Mark Gould Jr;Pres Phone number: 970 -379 -8326 Gould Construction Inc Email : markjr@gouldconstructlon.com PO Box 130 Glenwood Springs, CO 81602 Billing Contact (receives the invoice pertaining to the permit certification): Mark Gould Jr, Pres Phone number: 970-379-8326 Gould Construction Inc Emall: markjr@gouldconstructlon .com PO Box 130 Glenwood Springs, CO 81602 ADMINISTRATIVE CONTINUATION EXPLANATION: The Division ls currently developing a renewal permit and associated certification for the above permitted facility. The development and r~vlew procedures required by law have not yet been completed. The Construction St ormwater General Permit, which expired June 30, 2012, ls administratively continued and w i ll remain in effect under section 104(7) of the Administrative Procedures Act, C.R.S. 1973, 24·4-101, et seq (1982 repl. vol. 10) until a renewa l permit/certification Is Issued and effective . The renewal for this facility will be based on the application that was received 12/23/2013 The expiration date Identified on the enclosed certification (6/30/2012) Is correct; all effluent limits, terms and conditions of the administratively continued permit are In effect until the ren ewal Is complete. Colot.tdo Deportment of[>ublicHealth and Ernironrnent Facility Industrial Activity: Faclllty Located at: CERTIFICATION TO DISCHARGE UNDER COPS GENERAL PERMIT COR-0300000 STORMWATER ASSOCIATED WITH CONSTRUCTION ACTIVITIES Certification Number: COR03L569 This Certification to Discharge speclflcally authorizes: Gould Construction Inc to discharge stormwater from th e facility identified as Gould Construction Lower Yard Lease To the waters of the State of Colorado, Including, but not llmlted to: Roaring Fork River-Colorado River Construction Yard 4067 CR 154 Glenwood Springs CO 81601 Garfield County latitude 39.483 longitude -107 .293 Specific Information (If appllcable): · Certlflcatlon is effective: 12/24/2013 Expirat ion Date: 6/30/2012 *ADMINISTRATIVELY CONTINUED This certification under the permit requires that specific actions be performed at designated times. The certification holder Is legally obligated to comply with all terms and conditions of the permit. Signed, ~=- Nathan Moore Construction/MS4/Pretreatment Unit Manager Water Quality Control Division •explanation of Admin Continued In cover letter Page 1of22 i ~ HIGHLIGHTS CONSTRUCTION ACTIVITY STORMW ATER GENERAL PERMIT PERMIT REQUIREMENTS: * Inspections: Inspection of stormwater management system required at least every 14 days and after any precipitation or snowmelt event that causes surface erosion. (See Inspections, page 12 of the permit, enclosed.) * Records: Records of inspection s must be kept and be available for review by the Division. * Stormwater Management Plan (SWMP): A copy of the SWMP must be kept on the construction site at all times. PERMIT FEE: * Send payment only when you receive an invoice (sent once a year). PERMIT TERMINATION AND TRANSFER: * * * * * If the facility is finally stabilized, you may inactivate the permit, using the enclosed Division form . "Final stabilization" is reached when all the construction is complete, paving is finished, and the vegetation (grass, etc.) is established, not just reseeded. See permit, page 9. If the entire site changes ownersh ip, you should transfer the permit to the new owner. If part of the site will be sold to a new owner, you will need to reassign permit coverage. Forms for these actions are available on our website, below. Also see page 5 of the permit. QUESTIONS? * ... ... >!< • w'vw .coloradowaterpermits.com Email cdphe.wqstorm@state.co . u s Or call (303)692-3517, ask for Kathy Rosow 6/07 STATE OF COLORADO Bill Ritter, Jr., Governor James B. Marlin; Executive Director Dedicated to protecting and improving the health and environment of the pe ople of Colorado 4300 Cherry Creek Dr. S. Laboratory Services Division Denver, Colorado 80246·1530 8100 Lowry Blvd. Phone (303) 692-2000 Denver, Colorado 80230-6928 TDD Line (303) 691-7700 (303) 692-3090 Located in Glendale, Colorado http://www.cdphe.state.co.us Colorado Water Quality Control Di vision Notice of Termination Construction Stormwater Inactivation Notice www.coloradowate rpermits.com Colorado Department of Public Health and Environment Print or type all information. All items must be filled out completely and correctly. if the form is not complete, it will be returned. All permit terminations dates are effective on the date approved by the Divis i on. MAIL ORIGINAL FORM WITH INK SIGNATURES TO THE FOLLOWING ADDRESS: Colorado Dept of Public Health and Environment Water Quality Control Division 4300 Cherry Creek Dr South, WQCD-P-B2 Denver, CO 80246-1530 FAXED OR EMAILED FORMS WILL NOT BE ACCEPTED. • PART A. IDENTIFICATION OF PERMIT Please write t he permit certification number to be terminated Permit Certification Number (four digits, not "0000"): COR03 ___ _ • PART B. PERMITTEE INFORMATION Company Name ~-----~-------------------------------- Mailing Address -------------~---------------------- City State ________ _ Zip code ------ Legal Contact Name ------------'-----Phone number Title Email ~--------------~ • PART C. FACILITY/PROJECT INFORMATION Facility/Project Name -----------------------------~------~ Location (address) ------------------------------------- City Co unty ----------Zip cod e ------ Local Contact Name Phone number ~~~~~~~~~~~~~~~~ Title Email --------------- Page 1of 2 form last revised July 2009 COLORADO WATER QUALITY CONTROL DIVISION NOTICE OF TERMINATION www.coloradowaterpermlts.com • PART D. TERMINATION VALIDATION CRITERIA One of the criteria (1or2) below must be met, the appropriate box checked, and the required additional informatiOn provided. Part E includes a certification that the criteria indicated has been met. -OR- 1: Finally Stabilized or Construction Not Starte d -The permi t ted activities covered under the certificatio n listed in Part A meet the requirements for FINAL STABILIZATION In accordance with the permit, the Stormwater Management Plan, and as described below. This criterion sh ou ld also be selected if construction was neve r started and . no land was disturbed, and an explanation of this condition pro vided in the description below. Final stablllzatlon ls reached when: all ground surface disturbing act ivities at th e site have been completed including removal of all temporary erosion and sediment control measu re, an d unifo rm vegetative cover has been established with an individ~al plant density of at least 70 percent of predisturb anc e level s, or equivalent permanent; physical erosion reduction methods h ave been employed . REQUIRED for Criteria 1-Describe the methods used to m ee t the final stabilization c described above: Includ e an attachment if additional space is require d . 2: Separate Permit Coverage or Full Reassignmen t -All ongoing con structi on activ ities, including all disturbe d areas, covered under the permit certification listed in Pa rt A ha ve co verage unde r a separate COPS stormwater construction permit, including the permit certification issu ed w hen Di vision's Rea ssignment Form was used by the permittee to reassign all areas/activitie s. REQUIRED for Criteria 2-Provide the permit certification nu mber covering the ongoing activities: COR03 ___ _ STOP! One of the two criteria above MUST BE CHECKED an d the requ ired information for that criterion provided, or this form will not be processed and the permit will remai n active. • PART E. CERTIFICATION SIGNATURE (Required for all Termination Requests) I understand that by submitting this notice of inactivation, I am no lo nger authorized to discharge stormwater associated with construction activity by the general permit. I understand that disch ar ging pollutants in stormwater associated with construction activities to the waters of the State of Colorado, where such discha rge s are not authorized by a COPS permit, is unlawful under the Colorado Water Quality Control Act and the Clean Water Act. I certify under penalty of law that l have per sonally examined and am famili ar w ith th e inform ation submitted herein, and based on my inquiry of those individuals immediately responsible fo r obtain ing the i nformation, I believe that the information is true, accurate and complete . I am aware that there are significant pena lties for submitting false Infor ma t ion, Including the possibility of fine and imprisonment. (See 18 U.S.C 1001 and 33 U.S.C. 1319.} I also certify that I am a du ly authorized representative of the per mi t t ee named in Part B. Signature of Legally Responsible Party Date Signed Name (printed) Title Signatory requirements: This form shall be signed, d ated, and certifi ed for acc uracy by th e permittee in acc ordance with t he following criteria : 1. In the case of a corporation, by a principal executive offic e r of at lea st the leve l of vice -preside nt, or his or her duly authorized representative, if such re presentative is responsible for the overall operation o f the operation from whic h the d ischarge described herein originates ; 2. in the case of a partnership, by a general partner; 3. In the case of a sole proprietorship, by the proprietor; 4. In the case of a municipal, state, or other public ope ration, by with e r a princip al e xecutive officer, ranking el ec t e d official, or other duly authorized e mployee. Page 2 of 2 form last revised July 2009 Page 2 of22 Pennit No. COR-030000 CDPS GENERAL PERMIT STORMWATER DISCHARGES ASSOCIATED WITH CONSTRUCTION ACTIVITY AUTHORIZATION TO DISCH ARGE UNDER THE COLORADO DISCHARGE PERMIT SYSTEM In compliance with the provisions of the Colorado Wate r Quality Control Act, (25-8-101 et seq., CRS, 1973 as amended) and the Federal Water Pollution Control Act, as amended (33 U.S.C. 1251 et seq.; th e "Act"), this pennit authorizes the discharge of stormwater associ ate d with construction activities (and specific allowable non-storm water discharges in accordance with Part I.D.3 of the permit) certified under this permit, from those locations specified throughout the State of Colorado to specified waters of the State . Such discharges shall be in accordance with the conditions of thi s permit. This permit specifically authorizes the facility listed on page 1 of this permit to discharge, as of this date, in accordance with permit requirements and conditions set for th in Parts I and II hereof All discharges authorized herein shall be consistent with the terms and conditions of this permit. This permit and .the authorization to discharge shall expir.e at midnight, June 30, 2012. Issued and Signed this 31st day of May, 2007 COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT 4n~J/~( Janet S. Kieler Permits Section Manager Water Quality Control Division SIGNED AND ISSUED MAY 31, 2007 EFFECTIVE JULY 1, 2007 ADMINISTRATIVELY CONTINUED EFFECTIVE JULY 1. 2012 TABLE OF CON TENTS PART I A. COVERAGE UNDER TIIIS PERMIT ....................................................................................................................................... 3 l. Authority to Discharge ............................................................................................................... ." ............................. 3 a) Applicable Sections................................................................................................................................. 3 b) Oil and Gas Constn1ction .. . . . . ......... .......... ....... ..... ... ... ... . . . . ..... ...... ........... ..... ...... ..... ........ ... ... ..... ....... .. .. . . 3 2. Defutitions................................................................................................................................................................ 3 3. Pennit Coverage Without Application -Qualifying Lo cal Programs...................................................................... 3 a) Applicable Sections ........................................................................... :..................................................... 3 b) Local Agency Anthority...... ........... ... . . ... . ...... ..... .. . . . .... ... .. ... ... ...... ....... .. . . . .... ...... ..... ........ ... . ........ ....... ... . . 4 c) Permit Coverage Te rminati.011................................................................................................................. 4 d) Compliance with Qualifying Local Program .......................................................................................... 4 e) Full Permit Applicability......................................................................................................................... 4 4. Application, Due Dates............................................................................................................................................ 4 a) Application Due Dates............................................................................................................................ 4 b) Sununary of Application ......................................................................................................................... 4 5. Permit Certification Procedures .................................. ................... .......................................................................... 4 a) Request for Additional Information ........................................................................................................ 4 b) Automatic Coverage ......................................................................................... :, ..................................... 5 c) Individual Penn it Required..................................................................................................................... 5 d) General vs . Individual Permit Coverage ......................... .'....................................................................... 5 e) Local Agency Authority .......................................................................................................................... · 5 6. Inactivation Notice................................................................................................................................................... 5 7. Transfer of Permit ................................................................................................................ : .................................... 5 8. Reassignment of Pennit.. .................................................................. : ....................................................................... 5 9. Sale of Residence to Hmneowners ........................................................................................................................... 6 10. Pennit Expiration Date............................................................................................................................................. 6 11. Individual Pennit Criteria ......................................................................................................................................... 6 B. STORMWATER MANAGEMENT PLAN -GENERAL REQUI RE MENTS ........................................................................... 6 C. STORM\VATER MANAGEMENT PLAN -CONTENTS ......................................................................................................... 7 1. Site Description ........................................................................................................................................................ 7 2. Site Map .................................................................................................................................................. :················ 7 3. Stonnwater Management Controls ................................................................................................................. : ......... 8 a) SWMP Administrator ............................................................................................................................... 8 b) Identification of Potential Pollutant Sourc es ............................................................................................ 8 c) Best Management Practices (BMPs) for Stonnwater Pollution Prevention ............................................ 8 4. Final St abilization and Long-term Stormwater Manage ment. ................................................................. : ................. 9 5. Inspection and Maintenance ..................... :............................................................................................................. 10 D. TERMS AND CONDITIONS ................................................................................................................................................... 10 l. General Limitations ................................................................................................................................................ 10 . 2. BMP Implementation and Design Standards: ..................................... : ................................................................... 10 3. Prohibition ofNon-Stomnvater Di scharges........................................................................................................... 11 4. Releases in Excess of Reportable Quantities.......................................................................................................... 11 5. S\VMP Requirements............................................................................................................................................. 11 a) SWMP Preparation and 1mplementation...................................... ......................................................... 11 b) S\VMP Retention Requirem ents ............................................................................ .-.............................. 11 c) SWMP Review/Changes....................................................................................................................... 11 d) Responsive SWMP Changes................................................................................................................. 12 6. Inspections ... ;. .......................................................................................................................................................... 12 a) Minimum Inspection Schedule ............................................................................................................... 12 b) Inspect ion Require1nent s . .. ........... ........... ........ .... ....... ................... ........ ................ ........ ...... ........ ....... .. .. 13 c) Reljuired Actions Following Site Inspecti ons ........................................................................................ 13 7. BMP Maintenance ................................................................................... .' ............................................................... 13 8. Replacement and Failed BMPs ............................................................................................................................... 14 9. Reporting................................................................................................................................................................. 14 -2a- TABLE O F CONTENTS (cont.) I 0. SWMP Availability ................................................................................................................................................. 14 11. Total Maximum Daily Load (TMDL) ..................................................................................................................... 14 E. ADDITIONAL DEFINITIONS.................................................................................................................................................. 15 F. GENERAL REQUIREMENTS ..................................................................... : ............................................................................ 16 1. Signatory Require1uents .................................................................................................................. ,.... ...... .. . . ......... 16 2. RetentionofRecords ............................................................................................................................................... 16 3. Monitoring ............................................................................................................................................................... 16 PART II A. MANAGEMENT REQUIREMENTS ........................................................................................................................................ 17 1. Amending a Permit Certification............................................................................................................................. 17 2. Special Notifications -Definitions .......................................................................................................................... 17 3. Noncompliance Notification ...................... ; ............................................................................................................ 17 4. Submission of Incorrect or Incomplete Information ........ : ...................................................................................... 18 5. Bypass ..................................................................................................................................................................... 18 6. Upsets ..................................................................................................................................................................... 18 7. Removed Substances ............................................................................................................................................... 18 8. Minimization of Adverse Impact. ....................................................................................................................... : .... 18 9 . Reduction, Loss, or Failure ofStonnwater Controls ................................... ~ ........ '. .................................................. 19 I 0. Proper ·operation and Maintenance ........................... : ............................................................................................. 19 B. RESPONSIBILITIES ................................................................................................................................................................. 19 1. Inspections and Right to Enhy ....................... ....... .................................................................................................. 19 2. Duty to Provide Information ................................................................................ ; .................................................. 19 3. Transfer of Ownership or Control .......................................................... : ................................................................ 19 4. Modification, Suspension, or Revoc ation of Penn it By Division ........................................................................... 20 5. Permit Violations ..................................................................................................................................................... 21 6. Legal Responsibilities .............................................................................. , .............................................................. 21 7. Severa.bility ............................................................................................................................................................. 21 8 . Renewal Application ............................................................................................................................................... 21 9 . Confidentiality .. : ...................................................................................................................................................... 21 10. ·Fees ......................................................................................................................................................................... 21 11. Requiring an Individual CDPS Pennit .................................................................................................................... 22 -2b- PART I Penn(t -Page 3 Pennit No. COR-030000 PART I A. COVERAGE UNDER TffiS PERMIT 1. Authority to Discharge Under this pennit, facilities are granted authorization to disch arge stonnwater associated with construction activities into waters of the state of Colorado. This pennit also authorizes the discharge of specific allowable non-stonnwater discharges, in accordance with Part l.D.3 of the permit, which includes discharges to the ground. This includes stormwater discharges from areas that are dedicated to producing eat1hen materials , such as soils, sand and gravel, for use at a single construction site (i.e., borrow or fill areas). This pennit also authorizes stormwater discharges from dedicate d asphalt batch plants and dedicated concrete batch plants. (Coverage under the construction site permit is not required for batch plants if they have alternate CDPS pennit coverage.) This permit does not authorize the discharge of mine water or process water from such areas. a) Ap11licable Sections: In accordance with Part I.A .3 of this pennit, some parts of this permit do not apply to sites covered under a Qualifying Local Program, as defined in I.A.2.d. For sites not covered by a Qualifying Local Program, all parts of the permit apply except Part I.A .3. The permittee will be respon si ble for determining and then complying with the applicable sections. b) Oil and Gas Construction: Stormwater discharges associated with construction activities directly related to oil and gas exploration, production, processing, and treatmen t operations or transmission facilit .ies are regulated under th e Colorado Discharge Pennit System Regulations (SCCR I 002-61), and require coverage under this permit in accordance with that regulation. However, references in this permit to specific authority under the Federal Clean Water Act (CWA) do not apply to .stonnwater discharges associated with these oil and gas related construction activities, to the extent that the references are limited by the federal Energy Policy Act of2005. 2 . Definitions a) Stormwater: Stonnwater is precipitation-induced surface runoff. b) Construction activity: Construction activity refers to ground surface disturbing activities, which include, but are not limited to, clearing, grading, excavation, demoliti on, installation of new or improved haul roads and access roads, staging areas, stockpiling of fill materials , and borrow areas. Construction does not include routine maintenance t? maintain original line and grade, hyd ra ulic capacity, or original purpose of the facility. c) Small construction activity: Stonmvater discharge assoc iated with small construction activity means the discharge of stonnwater from construction activities th at result in land d isturbance of equal to or greater than one acre and less than five acres . Small construction activity also includes the disturbance of less than one acre of total land a rea that is"part of a larger common plan of development or sal e , if the larger common plan will ultimately disturb equal to or greater than one and less than five acres . d) Qualifying Local Program: This permit includes conditions that incorporate qualifying local erosion and sediment control program (Qualifying ,Local Program) require ments by reference. A Qualifying Local Program is a municipal stonnwater program for stormwater discharges associ ated with small construction activity that has been formally approved by the Division. Other Definitions: Definitions of additional terms can be found in Part I.E. of this permit. 3. Permit Coverage Without Application -for small construction activities under a Qualifying Local Program only If a small construction site is within the jurisdiction of a Qu alifying Local Program, the operator of the construction activity is authorized to discharge stormwater associated wi th small construction activity under this general permit without the submittal of an application to the Division . a) Applicable Sections: For sites covered by a Qualifying Local Program, only Parts 1.A.l, 1.A.2, l .A.3, I.D.1, l.D.2, 1.D.3, 1.D.4, l.D.7, l.D.8, I.D.11, LE and Part II of thi s permit, with the exception of Parts II.A. I, Il.B.3, !I.B.8 , and I!.BlO, apply. PART I Permit -Page 4 Permit No. COR-030000 A. COVERAGE UNDER TIDS PERMIT (cont.) b) Local Agen cy Authority: This pennit does not pre-emp t or supersede th e author ity of local agencies to prohibit, restrict, or control discharges of stonnwater to storm drain systems or other water courses within their.jurisdiction. c) Penuit Coverage Termination: When a site tmder a Qualifying Local Program has been finally stabilized, coverage under this pennit is automatically terminated . d) Con}pliance with Qualifying Local Program: A con stru ction site operator that has authorization to discharge imder this permit under Part l.A.3 shall comply with the re quirements of the Qualifying Local Program with jurisdiction over the site. e) Full Permit Applicability: The Division may require a ny operator within the jurisdiction of a Qualifying Local Program covered under this pennit to apply for and obt ai n coverage under the full requirements of this permit. The 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 operator that would otherwise be covere d under Part l.A.3 of this pennit, the full requirements of this permit replace the requirements as per Part I.A.3 of this permit, upon the effective date of the pennit ce1tification . A site brought under the full require ments of this permit must still comply with local stormwater management requirements, policies or guidelines as required by Part I.D.l.g of this permit. 4. Application, Due Dates a) Application Due Dates: At least ten calendar days p r ior to the commencement of construction activities, th e applicant shall submit an application form as provided by the Division, with a certification that the Stormwater Management Plan (SWMP) is complete. One original completed discharge pennit application shall be submitted, by mail or hand delivery, to: Colorado D epa11ment of Public Health and E nviromnent Water Quality Control Division WQCD-Pennits-B2 4300 Cherry Creek Drive South Denver, Colorado 80246-1530 b) Summary of Application: The application requires, at a minimum, the following: I) The applicant's company name; address; telephone number; and email address (if available); whether the applicant is the owner, developer, or contractor; and local contact information; 2) Project name, address, county and location of the constrnction site, including the latih1d e and longitude to the nearest 15 seconds of the approximate center of the constrnction activity; 3) Legal description or map of the construction site; 4) Estimates of: tl,ie total area of the site, the area of the site that is expected to be disturbed, and the total area of the larger conunon plan of development or sale to undergo dist urbance; 5) The nature of the constrnction activity; 6) The anticipated start date and fuial stabilization da te for the project; 7) The name of the receiving water(s), or the munic ipal separate storm sewer system and the ultimate (i.e ., named) receiving water(s); · 8) Certification that the SWMP for the construction site is complete (see Part LC. below); and 9) The signature of the applicant, signed in accordanc e with Part J.F.1 of this permit. 5. Permit Cert ification Procedul'Cs If this general permit is appropriate for the applicant's operat ion, then a cettification will be developed and the applicant will be authorized to discharge stonnwater under this general permit. a) Request for Additional Information: The Division shall have up to ten calendar days afte r receipt of the above information to request additional data and/or deny the authorization for any particular discharge. Upon receipt of additional information, the Division shall have an additional ten calendar days to issue or deny authorization for the particu lar discharge. (Notification of denial shall be by letter, in cases where coverage under an alternate general permit or an individual permit is required, instead of coverage under this permit.) PART I Permit -Page 5 Permit No . COR-030000 A. COVERAGE UNDER TIIlS PERMIT (cont.) b) Automatic Coverage: If the applicant does not receive a request for additional infonnation or a notification of denial from the Division dated within ten calendar days of receipt of the application by the Division, authorization to discharge in accordance with the conditions of this pennit shall be deemed granted. · c) Individual Permit Requil'ed: If, after evaluation of the applicat ion (or additional infonnation, such as th e SWMP), it is found that this general permit is not appropriate for the operation, then the application will be processed as one for an individual permit. The applicant will be notified of the Division's decision to deny certification under thi s general pennit. For an individual permit, additional information may be requested, and 180 days may be required to process the application and issue the pennit. At the Division's discretion, temporary coverage under this general permit may be allowed until the individual pennit goes into effect. d) Genel'al vs. Iuclividual Permit Coverage: Any pennittee authorized by this pennit may request to be excluded from the coverage of this pennit by applying for an individual CDPS permit. The permittee shall submit an individual application, with reasons supporting the request, to the Division at least 180 days prior to any discharge. e) Local Agency Authority: This permit does not pre-empt or supersede the authority of local agencies to prohibit, restrict, or control di scharges ofstonnwater to storm drain systems or other water courses within their jurisdiction. 6. Inactivation Notice When a site has been finally stabilized in accordance with the SWMP, the permittee must submit an Inactivation Notice form that is signed in accordance with Part I.F.1. of this permit. The Inactivation Notice fonn is available from the Division and includes: a) Pennit certification number; b) The permittee's name, address, telephone number; c) Name, location, and county for the construction site for which the inactivation notice is being submitted; and d) Certification that the site has been finally stabilized, and a description of the final stabilization method(s). 7. Transfer of Permit When responsibility for stonnwater discharges at a constmction site changes from one ent ity to another, the pennittee shall submit a completed Notice of Trnnsfer and Acceptance of Terms form that is signed in accordance with Part l.F. l . of this permit. The Notice of Transfer form is available from the Division and includes: a) Permit certification number; b) Name, location, and county for the construction site for which the Notice of Transfer is being submitted; c) Identifying information for the new permittee; cl) Identifying information for the current pennittee; and e) Effective date of transfer. If the new responsible party will not complete the transfer form, the pe1mit may be inactivated upon written request to the Division and completion of the Inactivation Notice if th e permittee has no lega l responsibility, through ownership or contract, for the construction activities at the site. In this case, the new owner or operator would be required to obtain permit coverage separately. 8. Reassignment of Permit When a permittee no longer has control of a specific (lOrtion of a pennitted site, and wishes to transfer coverage of tha t portion of the site to a second party, the pennittee shall submit a completed Notice of Reassignment of Permit Covenige form that is signed in accordance with Part l.F. l. of this permit. The Notice of Reassigmnent of Penn it Coverage form is available from the Division and includes: a) CmTent permit certification number; b) Identif)'ing information and certification as required by Part l.A.4.b for the new permittee; c) Identifying information for the current permittee, revised site information and certification for reassignment; and d) Effective date of reassignment. PART I Permit -Page 6 Permit No. COR-030000 A . COVERAGE UNDER THIS PERMIT (cont.) If the new responsible party will not complete the reassignment form, the applicable portion of the permitted site may be removed from permit coverage upon written request to the Division if the pennittee has no legal responsibility, through ownership or contract, for the construction activities at the po1tion of the site. In this case, the new owner or operator would be required to obtain pennit coverage separately. · 9. Sale of Residence to Homeowners For residential construction only, when a residential lot has been conveyed to a homeowner and all criteria in paragraphs a through e, below, are met, coverage under this pennit is no longer required and the conveyed lot may be removed from coverage under the permittee's ce1tification. At such time, th e permittee is no longer responsible for meeting the terms and conditions of this pennit for the conveyed lot, including the re quirement to transfer or reassign permit coverage. The pennittee remains responsible for inactivation of the original certification. a) The lot has been sold to the homeowner(s) for private re sidential us e; b) the lot is less than one acre of disturbed area; c) all construction activity conducted by the pennittee on the lot is completed; d) a certificate of occupancy (or equivalent) has been awarded to the home owner; and e) the SWMP has been amended to indicate the lot is no longer covered by permit. Lots not meeting all of the above criteria require continued p ermit coverage. However, this permit coverage may be transferred (Part I.A.7, above) or reassigned (Paii I.A.8, above) to a new owner or operator. 10. Permit Expiration Date Authorization to discharge under this general pennit shall expire on June 30, 2012 . The Division must evaluate and reissue this general permit at least once eve1y five years and m ust recertify the permittee's authority to discharge under the general permit at such time. Therefore, a pennittee desiring c ontinued coverage under the general permit must reapply by March 31, 2012. The Division will initiate the renewal proces s; however, it is t1ltimately the permittee's responsibility to ensure that the renewal is submitted. The Division will detennine if the pennittee may continue to operate under the terms of the general permit. An individual pennit may be required for any facility not reauthorized to discharge under the reissued general pennit. 11. Individu11l Permit Criteria Various criteria can be used in evaluating whether or not an individual (or alternate general) permit is required instead of this general permit. This infonnation may come from the application, SWMP, or additional information as requested by the Division, and includes, but is not limited to, the following: a) the quality of the receiving waters (i.e., the presence of downstream drinking water intakes or a high quality fi~hery, or for preservation of high quality water); b) the size of the constrnction site; c) evidence of noncompliance under a previous permit fo r the operation; d) the use of chemicals within the stmmwater system; or e) discharges of pollutants of concem to waters for which there is an established Total Maximum Daily Load (TMDL). In addition, an individual pennit may be required when the Division has shown or has reason to suspect that the stormwater discharge may contribute to a violation of a water quality standard. B. STORMW ATER MANAGEMENT PLAN (SWMP) -GENERAL REQUIREMENTS 1. A SWMP shall be developed for each facility covered by thi s permit. The SWMP shall be prepared in accordance with good engineering, hydrologic and pollution control practices . (The SWMP need not be prepared by a registered engineer.) PART I Permit -Page 7 Permit No. COR-030000 B. STORMWATER MANAGEMENT PLAN (SWMP)-GENERAL REQUIREMENTS (cont.) 2. The SWMP shall: a) Identify all potential sources of pollution which may re asonably be expected to affect the quality of stonnwater discharges associated with construction activity from the facility; b) Describe the practices to be used to reduce the pollutants in stormwater discharges associated with construction activity at the facility; and ensure the practices are selected and described in accordance with good engineering practices, including the installation, implementat ion and maintenance requirements; and c) Be properly prepared, and updated in accordance with Pait I.D .5.c, to ensure compliance with the terms and conditions of this permit. 3. Facilities must implement the provisions of the SWMP as written and updated, from commencement of construction activity until final stabilization is complete, as a condition of this permit. The Division reserves the right to review the SWMP, and to require the pennittee to develop and implement additional measures to prevent and control pollution as needed. 4. The SWMP may reflect requirements for Spill Prevention Con trol and Counte1measure (SPCC) plans under section 311 of the CWA, or Best Management Practices (BMFs) Programs otherwise required by a separate CDPS pennit, and may incorporate any part of such plans into t he SWMP by reference , provided that the relevant sect ions of such plans are available as part of the SWMP consistent with Part I.D.S.b . 5. For ariy sites with permit coverage before June 30, 2007 , the permittee's SMWP must meet the new SWMP requirements as summarized in Section II.I of the rationale. Any needed changes must be made by October 1, 2007. C. STORMW ATER MANAGEMENT PLAN (SWMF) -CONTENTS The SWMP shall include the following items, at a minimum. 1. Site Description. The SWMP shall clearly describe the con s truction activity, to include: a) The nature of the construction activity at the site. b) The proposed sequence for major activities. c) Estimates of the total area of the site, and the area and location expected to be disturbed by clearing, excavation, grading, or other constrnction activities. d) A summary of any existing data used in the developm ent of the site construction plans or SWMP that describe the soil or existing potential for soil erosion. e) A description of the existing vegetation at the site and an estimate of the percent vegetative ground cover. f) The location and description of all potential pollution sources, including ground surface disturbing activities (see Part I.A.2.b ), vehicle fueling, storage of fertilizers or chemicals, etc. g) The location and description of any anticipated allowable sources of non-stonnwater discharge at the site, e.g., uncontaminated springs, landscape irrigation return flow, construction dewatering, and concrete washout. h) The name of the receiving water(s) and the size, type and location of any outfall(s). If the storm water discharge is to a municipal separate stonn sewer system, the name of that system, the location of the storm sewer discharge, and the ultimate receiving water(s). 2. Site Map. The SWMF shall include a legible site map(s), showing the entire site, identifying: a) construction site boundaries; b) all areas of ground surface disturbance; c) areas ofcut and fill; d) areas used for storage of building materials, equipment, soil, or waste; e) locations of dedicated asphalt or concrete batch plants; f) locations of all structural BMPs; g) locations of non-structural BMPs as applicable; and h) locations of springs, streams, wetlands and other surface waters. PART I Permit -Page 8 Permit No. COR-030000 C. STORMWATER MANAGEMENT PLAN (SWMP)-CONTENTS (cont.) 3. Stormwater Management Controls. The SWMP must include a description of all stormwater man agement controls that will be implemented as part of the construction activity to control pollutants in storm water disch arges. The appropriateness and priorities of stormwater management controls in the SWMP shall reflect the pote1itial pollutant sources identified at the facility. The description of stormwater management controls shall add ress the following components, at a minimum: a) SWMP Administrator -The SWMP shall identify a specific individual(s), position or title who is responsible for developing, implementing, maintaining, and revising the SWMP. The activities and responsibilities of the administrator shall address all aspects of the facility's SWMP. b) Identification of Potential Pollutant Sources -All potential pollutant sources, including materials and activities, at a site must be evaluated for the potential to contribute pollutants to stormwater discharges. The SWMP shall identify and describe those sources determined to have the potential to contribute pollutants to stormwater discharges, and the sources must be controlled through BMP selection and implementation, as required in paragraph (c), below. At a minimum, each of the following sources and activ ities shall be evaluated for the potential to contribute pollutants to stonnwater discharges, and identified in the SWMP if found to have such potential: l) all disturbed and stored soils; 2) vehicle tracking of sediments; 3) management of contaminated soils; 4) loading and unloading operations; 5) outdoor storage activities (building materials, fett ilizers, chemicals, etc.); 6) vehicle and equipment maintenance and fueling; 7) significant dust or pa1ticulate generating processes ; 8) routine maintenance activities involving fertilizers, pestic ides, detergents, fuels, solvents, oils, etc.; 9) on-site waste management practices (waste piles, liquid wastes, dumpsters, etc.); 10) concrete truck/equipment washing, including the concrete truck chute and associated fixtures and equipment; 11) dedicated asphalt and concrete batch plants; 12) non-industrial waste sources such as worker trash and portable toilets; and 13) other areas or procedures where potential spills can occur. c) Best Management Practices (Bl\IPs) for Stonnwatcr Pollulion Prevention -The SWMP shall identify and describe appropriate BMPs, including, but not limited to, those required by parngraphs 1 through 8 below, that will be implemented at the facility to reduce the potential of the sources identified in Part I.C.3.b to contribute pollutants to st01mwater discharges. The SWMP shall clearly de sc ribe the installation and implementation specifications for each BMP identified in the SWMP to ensure proper implementation, operation and maintenance of the BMP. l) Strnctural Practices for Erosion and Sediment Control. The SWMP shall clearly describe and locate all structural practices implemented at the site to minimize erosion and sediment transport. Practices may includ e, but are not limited to: straw bales, wattles/sediment control logs, silt fences, earth dikes, drainage s\vales, sediment traps, subsurface drains, pipe slope drains , inlet protection, outlet protection, gabions, and temporary or permanent sediment basins. 2} Non-Stmctural Practices for Erosion and Sediment Control. The SWMP shall clearly describe and locate, as applicable, all non-stmctural practices implemented at the site to minimize erosion and sediment transport. Description must include interim and pennanent stabilization practices, and site-specific scheduling for implementation of the practices. The SWMP should include practices to ensure that existing vegetation is preserved where possible. Non-structural practice s may include, but are not limited to: temporary vegetation, permanent vegetation, mulching, geotextiles, sod stabilization, slope roughening, vegetative buffer strips, protect ion of trees, and preservation of mature vegetation. PART I Pennit -Page 9 Permit No. COR-030000 C. STORMWATER MANAGEMENT PLAN (SWMP)-CONTENT S (cont.) 3) Phased BMP Implementation. The SWMP shall clearly describe the relationship between the phases of construction, and .the implementation and mainten ance of both structural and non-structural stormwater management controls. The SWMP must identify th e stonnwater management controls to be implemented during the project phases, which can include, but are not limited to, clearing and grubbing; road conslrnction; utility and infrastructure installation; vertical con st ruction; final grading ; and final stabilization. 4) Materials Handling and Spill Prevention. The SWMP shall clearly describe and locate all practices implemented at the site to minimize impacts from procedures or significant materials (s~e definitions at Part I.E.) that could contribute pollutants to runoff. Su ch procedures or significant materials .cou ld include: exposed storage of building materials; paints and solvents ; fe rtilizers or chemicals; waste material; and equipment maintenance or fueling procedures . Areas or procedures where potential spills can oc c ur must have spill prevention and response procedmes identified in the SWMP. 5) Dedicated Concrete or Asphalt Batch Plants. Th e SWMP shall clearly describe and locate all practices implemented at the site to control stonnwater pollution from dedicated concrete batch plants or dedicated asphalt batch plants covered by this certification. 6) Vehicle Tracking Control. The SWMP shall cle arly describe and locate all practices implemented at the site to control potential sediment discharges from vehi cle tracking. Practices must be implemen ted for all areas of potential vehicle tracking, and can include: minimi z ing site access; street sweeping or scraping; tracking pads; graveled parking areas; requiring that vehicles stay on paved areas on-site; wash racks; contractor education; and/or sediment control BMPs, etc. 7) Waste Management and Disposal, Including Con crete Washout. i) The SWMP shall clearly describe and loca te the practices implemented at the site to control stonnwater pollution from fill construction site wastes (liquid and solid), including concrete washout activities. ii) The practices used for concrete washout must ensure that these activities do not result in the contribution of pollutants associated with the washing ac tivity to stormwater runoff. iii) Part I.D.3 .c of the permit authorizes the co nditional discharge of concrete washout water to the ground. The SWMP shall clearly describe and loca te the practices to be used that will ensure that no washout water from concrete washout activities is discharged from the site as surface runoff or to surface waters. 8) Groundwater and Stormwater Dewatering . i) ii) The SWMP shall clearly describe and lo cate the practices implemented at the site to control stonmvater pollution from the dewatering of groundwater or stormwater from excavations, wells, etc. Part I.D.3.d of the permit iiuthorizes the conditional discharge of constmction dewatering to the ground. For any constmction dewatering of gro tmclwater not authorized under a separate CDPS discharge permit, the SWMP shall clearly describe and locate the practices to be used that will ensure that no groundwater from construction dewatering is discharged from the si te as surface rnnoff or to surface waters. 4. Final Stabilization and Loug-term Stonmvatcr Management a) The SWMP shall clearly describe the practices used to achieve final stabilization of all disturbed areas at the site, and any pla nned practices to control pollutants in stormwater discharges that will occur after constrnction operations have been completed at the site. b) Final stab ilization practices for obtaining a vegetativ e cover should in clude, as appropriate: seed mix selection and application methods; soil preparation and amendmen ts ; soil stabilization practices (e.g., crimped straw, hydro mulch or rolled erosion control products); and appropriate sedime11t control BMPs as needed until final stabilization is achieved; etc. ~~~~~~~~~~~~~~--~~-- PART I Pennit -Page 10 Permit No. COR-030000 C. STORMWATER MANAGEMENT PLAN (SWMP)-CONTENTS (cont.) c) Final stabili zation is reached when all ground surface disturbing activities at the site have been completed, and unifonn vegetative cover has been established with an ind ividu al plant density of at lea st 70 percent of pre- disturbance levels , or equivalent permanent, physical erosion reduction methods have been employed. The Division may, after consi.11tation with the pennittee and upon good cause, amend th e final stabilization criteria in this section for specific operations. 5. Inspection and Maintenance Part J.D.6 of the permit includes requirements for site inspections. Part I.D.7 of the pennit includes requirements for BMP maintenance. The SWMP shall clearly describe the inspection and maintenance procedmes implemented at the site to maintain all erosion and sediment control practices and other pro tective practices identified in the SWMP, in good and effective operating condition. D. TERMS AND CONDITIONS . 1. General Limitations The following limitations shall apply to all discharges covered by this pennit: a) Stormwater discharges from construction activities shall not cause, have the reasonab le potential to cause, or measurably contribute to an exceedance of any water quality standard, including narrative standards for water quality. b) Concrete washout water shall not be discharged to stat e surface waters or to storm sewer systems. On-site permanent disposal of concrete washout waste is not author ized by this permit. Discharge to the ground of concrete washout waste that will subsequently be disposed of off.site is authorized by this pennit. See Part l.D.3.c of the pennit. c) Bulk storage structures for petroleum products and any other chemicals shall hav e secondary containment or equivalent adequate protection so as tq contain all spills and prevent any spilled material from entering State waters. d) No chemicals are to be added to the discharge unless pennission for the use of a specific chemical is · granted by the Division. In granting the use of such chemicals, speci al conditions and monitoring may be addressed by separate correspondence. e) The Division reserves the right to require sampling and tes ting , on a case-by-ca~e basis, in the event that there is reason to suspect that compliance with the SWMP is a problem, or to mea sure the effectiveness of the BMPs in removing pollutants in the effluent. Such monitorin g may include Whole Effluent Toxicity testing. f) All site wastes must be properly managed to prevent potential pollution of State \\iaters . This pennil do es not authorize on-site waste disposal. · g) All dischargers must comply with the lawful requirem ents offederal agencies, municipalities, counties, drainage districts and other local agencies regarding any discharges of stonnwater to stonn drain systems or other water courses under their jurisdiction, including applicable requirements in municipal stonnwater management programs developed to comply with CDPS pennits. Dischargers must comply with local stonnwater management requirements, policies or guidelines including erosion and sediment control. 2. BMP Implementation and Design Standards Facilities must se lect, install, implement, and maintain appropriate BMPs, following good engineering, hydrologic and pollution control practices. BMPs implemen~ed at the site must be adequately designed to provide control for all potential pollutant sources associated with construction activity to prevent pollution or degradation of State waters. PART I Permit -Page 11 Permit No . COR-030000 D. TERMS AND CONDITIONS (cont.) 3. Prohibition ofNon-Stormwater Discharges a) Except as provided in paragraphs b, c, and d below, all dischinges covered by this pemtit shall be composecl entirely of stonnwater associated with construction ac tivity. Discharges of material other than stonnwater must be addressed in a separate CDPS permit issued for that disc harge . b) Discharges from the following sources that are combined with storm water discharges associated with construction activity may be authorized by th is permit, provided that the non-stormwater component of the discharge is identified in the SWMP (see Part I.C.1.g of this permit): -emergency fire fighting activities -landscape irrigation return flow -uncontaminated springs c) Discharges to the ground of concrete washout water from washing of tools arid concrete mixer chutes may be authorized by this pennit, provided that: I) the source is identified in the SWMP; 2) BMPs are included in the SWMP in accordance with Part I.C.3(c)(7) and to prevent pollution of groundwater in violation of Part I.D. I.a; and 3) these discharges do not leave the site as surface mnoff or to surface waters cl) Discharges to the ground of water from constrnction dewater ing activities may be authorized by this permit, provided that: I) the source is groundwater and/or groundwater combined with stormwater that does not contain pollutants in concentrations exceeding the State groundwater standards in Regulations 5 CCR 1002-41 and 42; 2) the source is id entifie d in the SWMP; 3) BMPs a re included in the SWMP, as required by Part I.C.3(c)(8); and 4) these discharges do not leave the site as surface runoff or to surface waters. Discharges to the ground from construction dewateri ng activit ies that do not meet the above criteria must be covered under a separate CDPS discharge permit. Contaminated groundwater requi ring coverage under a separate CDPS discharge pennit may include groundwater contamin ated with pollutants from a landfill, mining activity, industrial pollutant plume, underground storage tank, or other source. 4. Releases in Excess of Reportable Quantities This pennit does not relieve th e permittee of the reporting requirements of 40 CFR 110, 40 CPR 117 or 40 CFR 302. Any discharge of hazardous material must be handled in accordance with the Division's Noncompliance Notification Requirements (see Pai1 II.A.3 of the permit). 5. SWI\'IP Requirements a) SWlVIP Preparation and Implementation: The SWMP shall be prepared prior to applying for coverage under the general perutit, and certification of its completion submitted with the application. The SWMP shall be implemented prior to conunencement of construction activities. The plan shall be updated as appropriate (see paragraph c, below), below). SWMP provisions shall be implemented until expiration or inactivation of permit coverage. b) SWMP Retention Requirements: A copy of the Swtv.IP must be retained on site unless another location, specified by the pennittee, is approved by the Division. c) SWlVIP Review/Changes: The permittee shall amend the SWMP: 1) when there is a change in design, construction, operation, or maintenance of the site, which would require the implementation of new or revised BMPs; or 2) if the SWMP proves to be ineffect ive in achieving the general objectives of controlling pollutants in stonnwater discharges associated with constrnction activity ; or PART! Pennit -Page 12 Pennit No. COR-030000 D. TERMS AND CONDITIONS (cont.) 3) when BMPs are no longer necessmy and are removed. SWMP changes shall be made prior to changes in the site conditions, except as allowed for in paragraph d, below. SWMP revisions may include, but are not limited to: potential pollutant source identification; selection of appropriate BMPs for site conditions; BMP maintenance procedures; and interim and final stabilization practices. The SWMP changes may include a schedule for further BMP design and implementation, provided that, if any interim BMPs are needed to comply with the permit, they are also included in the SWMP and implemented during the interim period. d) Responsive SWl\'IP. Changes: SWMP changes addressing BMP ihstallation and/or implementation are often required to be made in response to changing conditions, or when current BMPs are detennined ineffective. · The majority of SWMP revisions to address these changes can be mad e immediately with quick in-the-field revisions to the SWMP. In the less common scenario where more complex development of materials to modify the SWMP is necessary, SWMP revisions shall be made in accordance with the following requirements : 1) the SWMP shall be revised as soon as practicable, but in no case more than 72 hours after the change(s) in BMP installation and/or implementation occur at the site, and 2) a notation must be included in 'the SWMP prio r to the site change(s) that includes the time and date of the change(s) it} the field, an identification of the BMP(s) removed or added, and the location(s) of those BMP(s). 6. Inspections Site inspections must be conducted in accordance with the following requirements and minimum schedules. The required minimum inspection schedules do not reduce or eliminate the permittee's responsibility to implement and maintain BMPs in good and effective operational condition, and in accordance with the SWMP, which could require more frequent inspections. a) Miuimum Ins11ection Schedule: The pennittee shall, at a minimum, make a thorough inspection, in a~cordance with the requirements in I.D.6.b below, at least once every 14 calendar days. Also, post-storm event inspections must be conducted within 24 horns after the end of any precipitation or snowmelt event that causes surface erosion. Provided the timing is appropriate, the post-stonn insp ec tions may be used to fulfill the 14-day routine inspection requirement. A more frequent inspection schedule than the minimum inspections described may be necessary, to ensure that BMPs continue to operate as needed to comp ly with the pennit. The following conditional modifications to this Minimum Inspection Schedule are allowed: 1) Post-Storm Event Inspections at Temporal'ily Idle Sites -Ifno constmction activities will occur following a stonn event, post-stonn event inspections shall be conducted prior to re-commencing construction activities, but no later than 72 hours following the stonn event. The occurrence of any such delayed inspection must be documented in the inspection record. Routine in spec tions still must be conducted at least every 14 calendar days. 2) Inspections at C _ompletecl Sites/Areas -For sites or pmiions ofsites that meet the following criteria, but final stabilization has not been achieved due to a vegetative cover that has not become established, the permittee shall make a thorough inspection of their stormwater management system at least once every month, and post- storm event inspections are not required. This reduced inspection schedule is only allowed if: i) all construction activities that will result in surface ground disturb ance are completed; ii) all activities required for final stabilization, in accordance with the SWMP, have been completed, with the exception of the application of seed that has not occurred due to seasonal conditions or the necessity for additional seed application to augment previous efforts; and iii) the SWMP has been amended to indicate those areas that will be inspected in accordance with the reduced schedule allowed for in this paragraph. PART I Pennit -Page 13 Permit No. COR-030000 D. TERMS AND CONDITIONS (cont.) 3) \Vinter Conditions Inspections Exclusion -Inspections are not required at sites where construction activities are temporarily halted, snow cover exists over th e entire site for an extended period, and melting conditions posing a risk of surface erosion do not exist. Thi s exception is applicable only during the period where melting conditions do not exist, and applies to the routine 14-day and monthly inspections, as well as the post-storm- event inspections. The following information mu st be documented in the inspection record for use of this exclusion: dates when snow cover occurred, date when constmction activities ceased, and date melting conditions began. Inspections, as described abov e, are required at all other times. When site conditions make the schedule required it} th is section impractical, the pennittee may petition the Division to grant an alternate inspection schedule . b) Inspection Requirements 1) Inspection Scope -The construction site perimeter, all disturbed areas, material and/or waste storage areas that are exposed to precipitation, discharge locations , and locations where vehicles access the site shall be inspected for evidence of, or the potential for, pollutants le aving the construction site boundaries, entering the stonnwater drainage system, or discharging to state waters . All erosion and sediment control practices identified in the SWMP shall be evaluated to ensure that they are maintained and operating correctly. 2) Inspection Report/Records -The pennittee shall keep a reco rd of inspections. Inspection repmts must identify any incidents of non-compliance with th e terms and conditions of this pennit. ·Inspection records must be retained for three years from expiration or ina ctivation ofpennit coverage. At a minimum, the inspection report must include: i) The inspection date; ii) Name(s) and title(s) of personnel making the inspection; iii) Location(s) of discharges of sediment or other pollutants from the site; iv) Location(s) of BMPs that need to be maintained; v) Location(s) ofBMPs that failed to operate as designed or proved inadequate for a particular location; vi) Location(s) where additional BMPs are ne eded that were not in place at the time of inspection; vii) Deviations from the minimum inspection schedule as provided in Part I.D.6.a above; vii) Description of c01Tective action for items iii, iv, v, and vi, above, dates corrective action(s) taken, and measures taken to prevent future violation s, including requisite changes to the SWMP, as necessary; and viii) After adequate corrective action(s) has been taken, or where a report does not identify any incidents requiring corrective action, the report shall contain a signed statement indicating the site is in compliance with the pennit to the best of the signer's knowledge and belief. c) Required Actions Following Site Inspections -Wh ere site inspections note the need for BMP maintenance activities, BMPs must be maintained in accordance with the SWMP and Part I.D.7 of the permit. Repair, replacement, or installation of new BMPs determined necessary during site inspections to address ineffective or inadequate BMPs must be conducted in accordance w ith Patt I.D.8 of the permit. SWMP updates required as a result of deficiencies in the SWMP noted during site in spections shall be made in accordance with Part I.D.5.c of the pennit. 7. BMP Maintenance All erosion and sediment control practices and other protect i\1e measures identified in the SW.tvfP must be maintained in effective operating condition. Proper selection and installat ion of BMPs and implementation of comprehensive Inspection and Maintenance procedures, in accordance w ith the SWMP, s hould be adequate to meet this condition. BMPs that are not adequately maintained in accordance with good engineering, hydrologic and pollution control practices, including removal of collected sediment outside the acceptable tolerances of th e BMPs, are considered to be no longer operating effectively and must be addressed in accordance with Part I.D.8, belo\v. A specific timeline for implementing maintenance procedures is not included in this pennit because BMP maintenance is expected to be proactive, not responsive. Observations resulting in BMP maintenance activities can be made during a site inspection, or during general obs ervation s of site conditions. PART I Permit -Page 14 Permit No. COR-030000 D .. TERMS AND CONDITIONS (cont.) 8. Replacement and Failed Bl\'lPs Adequate site assessment must be performed as part of comprehensive Inspection and Maintenance procedures, to assess the adequacy ofBMPs at the site, and the necessity of changes to those BMPs to ensure continued effective performance. Where site assessment results in the detennination that new or replacement BMPs are necessary, the BMPs must be installed to ensure on-going implementa tion ofBMPs as per Part l.D.2 . Where BMPs have failed, resulting in noncompliance with Part I.D.2, they must be addressed as soon as possible, immediately in most cases, to minimize the discharge of pollutants. When new BMPs are installed or BMPs are replaced, the SWMP must be updated in accordance with Part I.D.5(c). 9. Reporting No scheduled reporting requirements are included in this pennit ; however, the Division reserves the right to request that a copy of the inspection repo11s be submitted. I 0. SWMP Availability A copy of the SWMP shall be provided upon request to the Division, EPA, or any local agency in charge of approving sediment and erosion plans, grading plans or stormwater management plans, and within the time frame specified in the request. If the SWMP is required to be submitted to any of these entities, it must include a signed certification in accordance with Part I.F.l of the permit, certifying that the SWMP is complete and meets all permit requirements. All SWMPs required under this permit are cons idered reports that shall be available to the public under Section 308(b) of the CWA and Section 61.5(4) of the Colorado Discharge Permit System Regulations. The permittee shall make plans · available to members of the public upon request. However, the permittee may claim any portion of a SWMP as confidential in accordance with 40 CFR Part 2. 11. Total Maximum Daily Loacl (TMDL) If a TMDL has been approved for any waterbody into which the pennittee discharges, and stonnwater discharges associated with construction activity have been assigned a pollutant-specific Wasteload Allocation (WLA) under the TMDL, the Division will either: · a) Ensure that the WLA is being implemented properly through alternative local requirements, such as by a municipal stormwater pennit; or b) Notify the permittee of the WLA, and amend the permittee's certification to add specific BMPs and/or other requirements, as appropriate. The pennittee may be required to do the following : 1) Under the pennittee's SWMP, implement specific management practices based on requirements of the WLA, and evaluate whether the requirements are being met through implementation of existing stormwater BMPs or if additional BMPs are necessary. Document the calculations or other evidence that show that the requirements are expected to be met; and 2) If the evaluation shows that additional or modified BMPs are necessary, describe the type and schedule for the BMP additions/revisions. Discharge monitori11g may also be required. The permittee may maintain coverage under the general permit provided they comply with the applicable requirements outlined above. The Division reserves the right to require individual or alternate general permit coverage. PART I Pennit -Page 15 Permit No. COR-030000 E. ADDITIONAL DEFINITIONS For the purposes of this pennit: I . Best Management Practices (IlMPs): schedules of activities, prohibitions of practices, maintenance procedures, and other management practices to prevent or reduce the pollution of waters of the State. BMPs also include treatment requirements, operating procedures, pollution prevention, and practices to control site runoff, spillage or leaks, waste disposal, or drainage from material storage. 2. Dedicated asphalt plauts and concrete plants : portable asphalt plant s and concrete plants th at are located on or adjacent to a construction site and that provide materials only to that speci fic construction site. 3. Final stabilization: when all ground surface disturbing activities at the site have been completed, and unifonn vegetative cover has been established with an individual plant density of at least 70 percent of pre-disturbance levels, or equivalent permanent, physical erosion reduction methods have been employed. For purposes of this pennit, establishment of a vegetative cover capable of providing erosion control equivalent to p re-ex isting conditions at the site will be considered final stabilization. 4 . Municipal separate storm sewe1· system: a conveyance or system of conveyances (including: roads with drain age systems, municipal streets, catch basins, curbs, gutters, dit ches, man-made channels, or stonn drains), owned or operated by a State, city, town, county, district, or other public body (created by slate law), having jurisdiction over dispos al of sewage, industrial waste, stormwater, or other wastes; designed or used for collecting or conveying stormwater. 5. Operator: the entity that has day-to-day supervision and control of activities occurring at the construction site. This can be the owner, the developer, the general contractor or the agent of one of these parties, in some circumstances. It is anticipah;d that at different phases of a construction project, diffe rent types of parties may satisfy the definition of 'operator' and that the permit may be transferred as the roles change . 6. Outfall: a point source at the point where storm water leaves the constrnction site and discharges to a receiving water or a stormwater collection system. 7. Part of a larger common plan of development or sale: a contig uous area where mulliple separate and distinct construction activities may be taking place at different tim es on different schedules. · 8. Point source: any discernible, confined and discrete conveyance from which pollutants are or may be discharged. Point source discharges of stormwater result from strnctures which increase the imperviousness of the ground which acts to collect rnnoff, with runoff being conveyed along the resultin g drainage or grading pattern . 9. Pollutant: dredged spoil, dirt, sluny, solid wa ste , incinerator residue, sewage, sewage sludge, garbage, trash, chemical waste, biological nutrient, biological material, radioactive material, heat, wrecked or discarded equipment, rock, sand, or any industrial, municipal or agricultural waste. 10. Process water: any water which, during manufacturing or processing, comes into contact with or results from the production of any raw material, intennediate product, finished product, by product or waste product. This definition includes mine drainage. 11. Receiving Watel': any classified stream segment (including tributar ies) in the Stale of Colorado into which stonmvater related to construction activities discharges. This d efin ition incl udes all water courses, even if they are usually dry, such as borrow ditches, arroyos, and other unnamed waterways. 12 . Significant Materials include, but are not limited to : raw materials; fuels; materials such as solvents, detergents, and plastic pellets; finished materials such as metallic products; raw materials used in food processing or production; hazardou s substances designated under section 101(14) ofCERCLA; any chemical the facility is required to repmt pursuant to section 313 of title Ill of SARA; fertilizers; pesticides; and waste products such as ashes, slag and sludge that have th e potential to be released with stormwater discharge. · . 13. Stormwater: precipitation-induced surface mnoff. PART I Permit -Page 16 Pennit No. COR-030000 F. GENERAL REQUIREMENTS l. Signatory Requirements a) All rep011s required for submittal shall be signed and certified for accuracy by the permittee in accordance with tlie following criteria: l) In the case of corporations, by a principal executive officer of at lea st the level of vice-president or his or her duly authorized representative, if such representative is responsible for the overall operation of the facility from which the discharge described in the form originates; 2) In the case of a pa11nership, by a gene ral partner; 3) In the case of a sole proprietorship, by the proprietor; 4) Iri the case of a municipal, state, or other public facility, by either a princ ipal executive officer, ranking elected official, or other duly al1thorized employee, if such representative is re spon sible for th e overall operation o f the . facility from which the discharge de scribed in the form originates. b) Changes to authorization. Ifan authorization under paragraph a) of this section is no longer accurate because a different individual or position has responsibility for th e overall operation of the facility, a new authorization satisfying the requirements of paragraph a) of this sect ion must be submitted to the Division, prior to or together with any repm1s, infonnation, 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 : "I certify under penalty of law that this document and alt attaclunents 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 fo r gathering the infmmation, the infonnation submitted is, to the best of my knowledge and belief, tme, accurate, and complete. I am aware that there are significant penalties for submitting false inforination, including the possi bility offme and imprisomnent for knowing violations." 2. Retention of Records a) The pennittee shall retain copies of the SWMP and all reports required by this pennit and records of all data used to comp le te the application to be covered by this pe1mit, fo r three years after expiration or inactivation of permit coverage. b) The permittee shall retain a copy of the SWMP require d by this pennit at the construction site from the elate of project initiation to the date of expiration or inactivation of p ennit coverage, unless another location, specified by the pennittee, is approved by the Division. 3. Monitoring The Division reserves the right to require sampling and testin g , on a case-by-case basis (see Patt I.D. l .e), for example to implement the provisions of a TMDL (see Part I.D.11 of the perutit). Repmiing procedures for any monitoring data collected will be included in the notification by the Division of monitoring requirements. If monitoring is required, the following definitions apply: a) The tbfrty (30) day average shall be determined by the arithmetic mean of all samples collected during a thirty (30) consecutive-day period. b) A grab sample, for monitoring reqtiircments, is a single "dip and take" sample. PART II A. MANAGEMENT REQUIREMENTS 1. Ameudiug a Permit Certification The permittce shall inform the Division (Permits Section) in writing of changes to the information provided in the permit application, including the legal contact, the project legal descript io n or map originally submitted with the application, or the planned total disturbed acreage . The pennittee shall furnish the Division with any plans and specifications which the Division deems reasonably necessary to evaluate the effect on the discharge and receiving stream. If applicable, this notification may be accomplished through submittal of an application for a COPS process water permit authorizing th e discharge. The SWMP shall be updated and implemented prio r to the changes (see Part I.D.5.c). Any discharge to the waters of the State from a point source other than specifically authorized by this permit or a different COPS permit is prohibited. 2. Special Notifications -Defiuitious a) Spill: An unintentional rele ase of solid or liquid materi al which may cause pollution of state waters. b) Upset: An exceptional incident in which there is unint ent ional and tempormy noncompliance with permit discharge limitations because of factors beyond the reasonable control of the permittee. An upset does not include noncompliance to the extent caused by operational erro r, improper ly designed treatment facilities, inadequat e treatment facilities, lack of preventative maintenance, or careless or improper operation. 3. Noncompliance Notification a) The permittee shall report the following instances of no ncom pliance: I) Any noncompliance which may endanger health or the enviromnent; 2) Any spill or discharge of hazardous substances or oil which may cause pollution of the waters of the state. 3) Any discharge of stoml\vater which may cause an exceedance of a water quality standard. b) For all instances of noncompliance based on enviromnental haz ar ds and chemical spills and releases, all needed information must be provided orally to the Colorado Depai1ment of Public Health and Environment spill reporting line (24-hour number for environmental hazards and ch emical spills and releases: 1-877-518-5608) within 24 hours from the time the pennittee becomes aware of the circumstances. For all other instances of noncompliance as defined in this section, all needed information must be provided orally to the Water Quality Control Division within 24 hours from the time the permittee .becomes aware of the circumstances . For all instances of noncompliance identified here, a wri tten submission shall also be provided within 5 calendar days of the time the permittee becomes aware of the circumstances. The written submission shall contain a description of: 1) The noncompliance and its cause; 2) The period of noncompliance, including exact dates and times, and if th e noncompliance has not been corrected, the anticipated time it is expected to continue; 3) Steps taken or planned to reduce, eliminate, and prevent reoccurrence of the noncompliance. A. MANAGEMENT REQUIREMENTS (cont.) 4. Submission of Inconect or Incomplete Information Where the pennittee failed to submit any relevant facts in a per mit application, or submitted incorrect information in a permit application or report to the Division, or relevant new in format ion becomes available, the permittee shall promptly submit the relevant application information which was not submitted or any add it ional information needed to correct any erroneous information previously submitted. s.. Bymiss · a) A bypass, which causes effluent limitations (i.e., requirements to implem ent BMPs in accordance with Parts I.B.3 and l.D.2 of the pennit) to be exceeded is prohibit ed, and the Division may take enforce ment action against a permittee fo r such a bypass, unless: 1) Bypass was unavoidable to prevent lo ss of life, persona l injury, or severe properly damage; 2) There were no feasible alternatives to the bypa ss, such as the use of auxiliary treatment facilities (e .g., altemative BMPs), retention of untreated wa stes, or main tenance during normal periods of equipment downtime. This condition is not satisfied if the pennittee could have inst alle d adequate backup equipment (e.g ., implemented additional BMPs) to prevent a bypass which occurred during nonnal periods of equipment downtim e or preve ntative maintenanc e; and 3) The permittee submitted notices as required in "Non-Compliance Not ific at ion ," Part II.A.3. 6. Upsets a) Effect of au Upset: An upset constitutes an affirm ative defe nse to an action brought for noncompliance with permit limitation s and requirements if the requirements of paragraph b of this section are met. (No determin ation made during administrative review of claims that noncompli ance was caused by upset, and before an action fo r noncompliance, is final administrative action subject to judic ial rev iew.) b) Conditions Necessary for a Demonstration of Upset : A permittee who wishes to establish the affinnative defen se of upset shall demonstrate tluough properly signed contemporaneous operating logs, or other relevant evidence that: 1) An upset occuned and that the pennittee can identify the specific cause(s) of the upset; 2) The pennitted facility was at the time being properly opera ted ; 3) The pennittee submitted notice of the upset as required in Pait II.A .3. of thi s permit (24-hour notic e); and 4) The p emtlttee complied with any remedial measures requi red unde r 40 CFR Section l22.4l(d) of th e federal regulations or Section 61.8(3)(h) of the Colorado Discharge Pe1mit System Regulations. c) Burden of Proof: In any enforcement pro ceed in g the p erm itte e seek ing to establish th e occurrence of an up se t ha s the burden of proof. 7. Removed Substances Solids, sludges, or other pollutants removed in the course of tr eat ment or control of discharges shall be properly di sp osed of in a mmmer such as to prevent any pollutant from such ma teria ls from entering waters of the State. 8. Minimization of Adverse Impact The pennittee shall take all rea sonable steps to minimi ze any adverse impa ct to waters of th e State resulting from noncompliance with any terms and conditions sp ec ified in this permit, including such accelerated or additional monitoring as necessary to detennine the nature and impact of the noncom plying discharge. · A. MANAGEMENT REQUIREMENTS (cont.) 9. Reduction, Loss, or Failure of Stonuwater Controls The permittee has the duty to halt or reduce any activity ifnecessmy to maintain compliance with the permit requirements. Upon reduction, loss, or failure of any stormwater controls, th e permittee shall, to the extent necessary to maintain compliance with its permit, control production, or remove all pollutant sources from exposure to stonnwater, or both, until the storinwater controls are restored or an alternative method of treatment/control is provided. It shall not be a defense for a permittee in an enforcement action that it would be necessmy to halt or reduce the permitted activity in order to maintain compliance with the conditions of this pennit. 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 pennittee to achieve compliance with the conditions of this pennit. 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 operation of back-up or auxiliary facilities or similar systems only when necessaiy to achieve compliance with the conditions of the permit. B. RESPONSIBILITIES 1. Inspections and Right to Entry The pennittee shall allow the Director o f the State Water Quality Control Division, the EPA Regional Administrator, and/or their authorized representative(s), upon the presentation of credentials: a) To enter upon the pennittee'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 rec ords required to be kept under the terms and conditions of this pennit 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 other matters related to the pennit, and access to any and all facilities cir areas within the pennittee's premises that may have any effect on the discharge, pennit, or any alleged violation. 2. Dutv to Provide Information The permittee shall furnish to th e Division, within the time fr a me specified by the Division, any information which the Division may request to determine whether cause exists fo r modifying, revoking and reissuing, or inactivating coverage under this permit, or to determine compliance with this permi t. The permittee shall also furnish to the Division, upon request, copies of records required to be kept by this permit. 3. Transfer of Ownership or Control Certification under this permit may be transferred to a new permittee if: a) The current pennittee notifies the Division in writing when the transfer is desire d as outlined in Part I.A.7; and b) The notice includes a written agreement between the existing and n ew penniuees containing a specific date for transfer ofpennit responsibility, coverage and liability between them; and c) The current pennittee has met all fee requirements of th e Colorado Discharge Permit System Regulations , Section 6l.15. B. RESPONSIBILITIES (cont.) 4. Modification, Suspension, or Revocntion of Permit By Division All pennit modification, inactivation or revocation and reissuan ce actions shall be subject to the requirements of the Colorado Discharge Permit System Regulations, Sections 61.5(2), 61.5(3), 61.7 and 61.15, 5 C.C.R. 1002-61, except for minor modifications. a) This pennit, and/or certification under this pennit, may be modified, suspended, or revoked in whole or in part during its term for reasons determined by the Division in cl uding, but not limited to, th e following: 1) Violation of any terms or conditions of the permit ; 2) Obta ining a permit by misrepresentation or failing to disclose any fact which is material to the granting or denial of a permit or to the establishm ent of terms or c onditions of the pennit; 3) Materially false or inaccurate statements or inform ati on in the application for the pennit; 4) Promulgation of toxic effluent standards or proh ibit io ns (including any schedule of compliance sp ecified in such effiuent standard or prohibition) which are esta blished under Section 307 of the Clean Water Act, where such a toxic pollutant is present in the discharge an d such standard or prohibition is more stringent than any limitation for such pollutant in this permit. b) This permit, and/or certification under this permit, may be modified in whole or in part due to a change in any condition that requires either a temporary or p ennanent re duction or elimination of the permitted discharge, such as: 1) Promulgation of Water Quality Standards applicabl e to waters affected by the pennitted discharge; or 2) Effluent limitations or other requirements applicable p ursuant to the State Act or federal requirements; or 3) Control regulations promulgated; or 4) Other available infonnation indicates a potential fo r violation of adopted Water Quality Standards or stream classifications. c) This permit, or certification under this permit, may be modified in whole or in part to include new effluent limitations and other appropriate permit conditions whe re data submitted pursuant to Part I indicate that such effiuent limitations and pennit conditions are necessary to ensure compliance with applicable water quality standards and protection of classified uses. d) At the request of the pennittee, the Division may modi fy or inactivate certification under this permit if the following conditions are met: I) In the case of inactivation, the penuittee notifies the Division of its intent to inactivate the certification, and certifies that the site has been finally stabilized; 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 discharge(s) which may affect waters of the State. 3) The Division finds that the pennittee has shown reas onable grounds consistent with the Federal and State statutes and regulations for such modification, amendment or inactivation; 4) Fee requirements of Section 61.15 of the Colorado D ischarge Pennit System Regulation s have been met; and 5) Applicable requirements of public notice have bee n met. For small constrnction sites covered by a Qualifying Loca l Program, coverage under this pennit is automatically tenninated when a site has been finally stabilized. B. RESPONSIBILITIES (cont.) S. Permit Violations Failure to comply with any tenns and/or conditions of this permit shall be a violation of this permit. Dischargers ofstormwater associated with industrial activity, as defined in the EPA Stonnwater Regulation (40 CFR 122.26(b )( l 4) and Section 6 l.3(2) of the Colorado Discharge Permit System Regulations, which do not obtain coverage under this or other Colorado general permits, or under an individual COPS pennit regulating industrial stormwater, will be in violation of the federal Clean Water Act and the Colorado Water Quality Conti'ol Act, 25-8-101, as amended., Failure to comply with CDPS permit requirements will also constitute a violation. 6. Legal Responsibilities The issuance of this permit does not convey any property or water rights in either real or personal property, or stream 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 permittee from .any responsibilities, liabilities, or penalties established pursuant to any applicable State law or regufation under authority · granted by Section S 10 of the Clean Water Act. 7. Severability The provisions of this permit are severable. If any provisions of this permit, or the application of any provision of this permit to any circumstance, are held invalid, the application of such provision to other circumstances and the application of the remainder of this pennit shall not be affected. 8. Renewal Application If the pennittee desires to continue to discharge, a permit renewal application shall be submitted at least ninety (90) days before this permit expires. If the permittee anticipates that there will be no discharge after the expiration date of this pennit, the Division should be promptly notified so that it can inactivate the cet1ification in accordance with Part II.B.4.d. 9. Confidentiality Except for data detennined to be confidential under Section 308 of the Federal Clean Water Act and Colorado Discharge Permit System Regulations, Section 61.5( 4), all report~ prepared in accordance with the terms of this permit shall be available for public inspection at the offices of the Division. The permittee must state what is confidential at the time of submittal. Any information relating to any secret process, method of manufacture or production, or sales or marketing data which has been declared confidential by the permittee, and which may be acquired, ascertained, or discovered, whether in any sampling investigation, emergency investigation, or otherwise, shall not be publicly disclosed by any member, officer, or employee of the Commission or the Division, but shall be kept confidential. Any person seeking to invoke the protection of this section shall bear the burden of proving its applicability. This section shall never be interpreted as preventing full disclosme of effluent data. 10. Fees The permittee is required to submit payment of an annual fee as set fm1h in the Water Quality Control Act. Failure to submit the required fee when due and payable is a violation of the permit and will result in enforcement action pursuant to Section 25-8-601 et. seq., C.R.S. 1973 as amended. B. RESPONSIBILITIES (cont.) 11 . Requhing an Indiviilual CDPS Permit The Director may require the pennittec to apply for and obtain an in dividual or alternate general CDPS permit if: a) The discharger is not in complinnce with the conditions o f this general permit; b) Conditions or standards have changed so th at the di scharge no longer qualifies for a general permit; or c) Data/infonnation become available which ind ica te water qua lity standards may be violated. The permittee must be notified in w ri tin g th at an application for an individual or alternate general CDPS pennit is required . When an individual or alternate general CDPS permit is issued to an operator otherwise covered under this general petmit, the applicability of this general permit to that operator is autom atic ally inactivated upon the effective date of th e individual or alternate general CDPS permit. Water Quality Control Divisioil WQCD-P -B2 4300 Cherry Creek Drive South Denve1~ Colorado 80246-1530 RATIONALE STORMWATER DISCHARGES ASSOCIATED WITH CONSTR UCTJON ACTIVITY GENERAL PERMIT IN COLORADO THIRD RENEWAL COLORADO DISCHARGE PERMIT NUMBER COR-030000 I. 11. III. JV. v. VJ. VII. VIII. IX x !. INTRODUCTION CONTENTS lntrod11ctio11 Changes in this General Permit Background Stonmvater Discharges Associated with Construction Activity Coverage Under this Permit Application and Certification Qualifjiing Local Programs Terms and Conditions of Permit Public Notice -12122106 Public Notice -3123107 PAGE 1 1 8 9 JO JO 11 11 15 15 This permit is for the regulation ofslomnvater runoff from construclion activities, and specific allowable 11011- storm.water discharges in accordance with Part l.D.3 of the permit. The term "construction activity" includes ground swface disturbing activities, i11cl11ding, but not limited to, clearing, grading, excavation, demolition, installation of new or improved haul and access roads, staging areas, stockpiling of fill materials, and borrow areas. "Stonmvater" is precipitation-induced surface runoff. This rationale will e.\plain the background of the Stormwater program, activities which are covei·ed under this permit, how to apply for coverage under this permit, and the requirements of this permit. The forms <liscusse<I in the rationale m;ul permit are available on lite Water Quality Conll'ol Division's website al: w II' JV. cdplt e.stll te. co. uslwq/Perm its Unit II. CHANGES IN THIS GENERAL PERMIT Several notable changes from the previous General Permit for Construction Activities have been incorporated into this permit. Significant changes are listed below. Numerous other minor changes were made for clarification pwposes only. A.' Authority to Discharge This section has been restmclured to list all of the types of activities covered by this permit, and lo be consistent with the definition of "construction activity. 11 The definition of construction activity has been expanded to provide c/arificatio11. See Part I.A .1 of the permit. PART II Permit -P~ge 24 Permit No. COR-030000 II. CHANGES IN THIS GENERAL PERMIT (cont.) B. Authority to Discharge -Oil and Gas Co11strnctio11 This section has been added, to take into account a regulatory change. The federal Energy Policy Act of 2005 exempts nearly all oil and gas constrnction activities from federal requirements under the Clean Water Act's NPDES stormwater discharge permit program. in Janumy 2006, the Colorado Water Quality Control Commission held a hearing to determine what effects, if any, the change in federal law would have upon Colorado's stormwater regulations . The Commission determined that oil and gas co11struction sites in Colorado that disturb 011e or more acres are still required to be covered under Colorado's stormwater permitting regulations (Colorado Discharge Permit System (CDPS) regulations (5CCR 1002-61)). In practice, oil and gas construction sites have the same requirements under this permit as do other types of construction. However, this permit contains some references to the federal Clean Water Act; generally these references are not applicable to oil and gas constrnction sites to the extent that the references are limited by the federal Energy Policy Act of 2005. See Part I.A.I (b) of the permit. C. Application Req11ire111e11ts The permit application requirements !rave changed slightly, including the addition of an email address, if , available. See Part l.A .4(b). The applicant must be either the ownel' and/or operator of the construction site. An operator at a construction site that is not covered by a certification held by an appropriate e11tity may be held liable for operating without the necessary permit coverage. D. Temporarv Coverage Part I.A.5(d) of the previous permit (effective July 1, 2002) dealt with temporarily covering a facility under the general permit even if an individual permit is more appropi·iate. This permit section essentially d1iplicated the previous section (see Part l.A.5(c)), and so it has been deleted. E. Reassignment of Permit Coverage Procedures have been added to clarify the requirem ents for the transfer of coverage of specific portions of a permitted site to a seco11d party. See Section VIJJ.l.3 of the rationale mid Part I.A .8 of the permit. F. Individual Permit Criteria This section has been modified to include situatio11s i11volving a Total 1'1axi11111111 Daily Load (TMDL). See Part I.A. I 1 of the permit. G. Stormwater Management Plan (SWlvJP) The Stormwater Management Plan section has been divided into two parts: Stormwater Management Plan (SW.MP) -General Requirements, which provides the basic framework and general require111e11tsfor the SWMP, and Stormwater Ma11agement Pla11 (SWMP) -Contents, which specifically identifies each item that must be addressed in the SWMP. See Parts LB and I.C of the permit. H. Stonmvater Management Plan (SWlvJP) -General Requirements The SWMP General Requirements section has been modified to require that the SWlvfP be updated in accordance with Parts l.D.5(c) and l.D.5(d) of the permit (SWMP Review/Changes). This additional requirement ensures that the SWMP provisions reflect current site conditions. See Part I.B.2(c) of the permit. PART II Pennit -Page 25 Pennit No. COR-030000 II. CHANGES IN THIS GENERAL PERMIT (cont.) I. Stormwater Manageme11t P/a11 (SWlvJP) -Contents The SWMP Contents section has been modified. Some of the changes are limited to orga11ization of information, which does 1101 require modification of cm existing permittee 's current SWMP. Most of the SWMP changes i11volve either clarificatio11s, reformatting, or taking reco111111endations from the Division's SWA1P guide and making them permit requirements (e .g., vehicle tracking co11trols, BMP i11stallation specifications). If a11 existing permittee (i.e., those with permit covemge before June 30, 2007) followed the recommendations in the SWMP guide (Appendix A of the permit application), then their SWMP will presumably meet the new requirements. However, for any existing permillees who did not.follow the applicable SWMP guide recomme11datio11s, their SMWP must be amended to include the new required items: -SWMP Administrator -Identification of potential pollutant sources -Best Management Practices descriptions and i11stallation specificatio11s, i11c/11di11g dedicated concrete or asphalt batch plants; vehicle tracking control; and waste 111anageme11t and disposal (including concrete washout activities). For existing permittees, any SWMP changes based 011 the change in permit req11irements must be completed by October 1, 2007. The plan is not to be submitted to the Division unless req11 ested, but must be available on site as outlined in Part J.D:5(b) of the permit. The BMP requirement clarifications included in this renewed permit in no way imply that adequate BMPs to address all pollutant sources at a permitted site were not required in previous permits. The revised requirements are intended only to better clarify SWMP content requirements and provide improved direction to permittees. The SW MP changes are listed below. All new applic ants (after J1111e 30, 2007) for permit coverage for their sites 11111st fully comply with the new SWMP organization, plan requirements, and implementation. 1. Site Descriptio11: The requirement lo provide an estimate of the run-off coefficient has been removed. The run-off coefficient as currently utilized i11 the SWMP may not contribute sufficiently to permit compliance to justify the effort in determining accurate values. See Part J.C. J of the permit. However, the Division still encourages use of the coefficient as needed to adequately evaluate site-specific BMP selection and design criteria (e.g., pond capac ities, Blv!P locatio11, etc.) See Section C.2 of the SWMP guidance (Appendix A of the permit application). 2. Site Map: The requirement lo identify boundaries of the 100-yearjlood plain has been removed. The boundaries as currently utilized in the SWMP may not contribute sufficie11tly to permit compliance to justify the effort in determining their location . See Part I. C.2 of the permit. 3. Stonmvater Management Controls: This section has been modified to require identification of a SWMP Administrator and all potential pollutants sources in the SWMP. See Part I. C.3 of the permit. a) The SWMP Administrator is a specific individual(s), position or title who is responsible for the process of developing, implementing, ni'aintai11ing, and revising the SWMP. This individual serves as the comprehensive point of contact for all aspects of the facility's SWMP. Tit is requirement may necessitate changes to existing permillees' SWMPs. PART II Permit -Page 26 Permit No. COR-030000 II. CHANGES IN THIS GENERAL PERMIT (cont.) b) The requirement to identify Potential Pollutant Sources has been expanded to include more details for the evaluation of such sources. This evaluation allows for the appropriate selection ofBMPsfor implementation at a facility or site. Additionally, this section was added to be consistent with the SWMP guide. Tltis requirement may 11ecessitate cha11ges to existing permittees' SWMPs. c) Best Management Practices (BMPs) for Stormwater Pollution Prevention: This section was modified to require the following items to be addressed in the SWkfP. These requirements may 11ecessitate changes to existing permittees' SWMPs. This section also requires that the SWMP provide installation and implem entation specifications for each BMP identified in the SWMP. For structural BMPs, in most cases, this must include a technical drawing to provide adequate installation specifications. See Part I. C.3(c). i) Dedicated concrete or asphalt batch plants. This section requires that the practices used to reduce the pollutants in stonmvater discharges associated with dedicated concrete or asphalt batch plants be identified in the SWMP. (Coverage under the constmction site SWMP and permit is 110/ required for batch plants if they have alternate CDPS permit coverage.) ii) Vehicle tracking control. This section requires that practices be implemented to control sediment from vehicle tracking, and that all such practices implemented at the site be clearly described in the SWMP. iii) Waste management and disposal. This section requires that the practices implemented at the site to control stomnvater pol!11tio11 from construction site waste, including concrete washout activities, be clearly described in the SWMP. It also requires that concrete washout activities be conducted i11 a manner that does not contribute pollutants to swface waters or stonmvater runoff iv) Concrete Washout Water. Part 1.D.J(c) of the permit has been revised to co11ditio11ally authorize discharges to the'ground of concrete wash waterfrom washing of tools and concrete mixer chutes when appropriate BMPs are implemented. The permit prohibits the discharge of concrete washout water to swface waters and to storm sewer systems. Part l.C.3(c)(7) of the permit requires that BMPs be in place to prevent smface discharges of concrete washout waterfrom the site. The use of unlined pits to contain concrete washout water is a common practice in Colorado . The Division has further evaluated the need for a permit for dischcirge of concrete washout water to the ground. · The Division has determined that the use of appropriate BMPs for on-site washing of tools and concrete mixer clwt~s would prevent any significant discharge to groundwater. BMPs to protect groundwater are required by Part J.C.3(c)(7) of the permit. Because pH is a pol!11ta11t of concern for washout activities, the soil must have adequate buffering capacity to result in protection of the groundwater standard, or a liner/containment must be used. The following management practices are recommended to prevent an impact from unlined pits to groundwater: (J) the use of the washout site should be tempormJ' (less than 1 yem), and (2) the washout site should be not be located in an area where shallow groundwater may be present, such as near natural drainages, springs, or wetlands. PART II Pennit -Page 27 Permit No . COR-030000 II. CHANGES IN THIS GENERAL PERMIT (cont.) Where adequate managem ent practices are not followed to protect groundwater quality , th e D epartm ent may require discharges to unlined pits to cease, or require th e entity to obtain altemate regulatory approval through no tice fi'om either the Water Quality Control Division or the Hazardous Materials and Wast e Management Division In addition, Part I.D. 1 (b) of the p erm it has been r e vised to clearly state that th e permit do es not authorize on-site permanent disp os al of concrete washout waste, only temporarv containment of concrete washout waterfi·om washing of tools and concrete mixer chutes. Upon termination of use of the washout s ite, accumulated solid waste, including con c re te was te and any contaminated soils, m us t b e rem o ved.from the site to pre vent on-s ite disposal of solid waste. v) Constru ction Dewatering . Part l.D .3 (d) of th e p ermit has been revised to conditionally authorize dis charge s to th e ground of water.from c ons trnction dewatering activities when appropriate BMPs are impleme nted. Th e p ermit does not authorize th e discharge of grou11d1vaterfrom constrnction dewatering to s 111face waters or to storm sewer systems. Part I.C.3(c)(8) of the permit re qu ires that B MPs be in place to prevent swface discharges. The p ermittee may apply for coverage under a s eparate CDPS discharge p ermit, such a s th e Construction De watering g e neral p ermit, if th ere is a potential for discharges to swface waters. Th e Division has determined that potential p o llutant sources introduced into gro1111dwater froi1i co11struction d e watering operations d o no t have a 1;easo11able pote ntial to res ult in exceeda11 ce of grou11dwater standards whe n th e discharge is to the ground. Th e primmJ1 pol/11ta11t of concern in u11co11tami11ated g r o 1111dwater is sedi111e11t. Although technology- based standards/or sediment do exis t in 5 CCR 1002-41, the discharge of sediment to th e ground as part of co11stmction d ewaterin g does not have the reasonable potential to result in transport of sediment to the gro undwater ta ble so as to result in an exceedance oftlwse standards. For a discharge of water contaminated with other pollutants that are present in concentrations that may cause an exceedan ce of groundwater standards, separate CDPS discharge permit coverage is r equired. C ontaminated groundwater may include that contaminated with pollutants fiwn a landfill, mining activity, industrial pollutant plume, unde rground storage tank, or oth er s ource of human-induced groundwater pollution and · exc eedi11g th e State groundwater standards in Regulations 5 CCR 1002-41and42. J. Terms and Conditions, Gen eral Limitations and D es ig n Standards This section reiterates th e requirement that fa c ilities select, in s tall, imple ment, and maintain appropriate BMPs, following good engineering, hydrologic and p ollution control practices. In addition, requirem ents for protection of waler quality standards (s ee Part J.D.J.(a) of th e p ermit) and requirements to adequate ly design BMPs lo preve11t pollution or degradation of S tate waters (see Part I.D.2 of th e permit) have bee11 revised and are fully discu ssed in Part 111.B of the rationale, below. Additional language was also added to Section Ill.B of the rationalejitrt!ter clarifj1i11g th e e,\p ectafions for compliance with this permit. 1. Management o(Site Waste This section has been modified to clarify that on-site waste must be properly 111a11aged to prevent potential pollution of State waters, and that this p ermit does not authoriz e 011-sit e waste disposal. Solid waste disposal is i·egulated by the Hazardous Materials and Waste Management Division. PART II Permit -Page 28 Permit No. COR-030000 II. CHANGES JN THIS GENERAL PERMIT (cont.) K Terms and Conditions. SWMP Requirements I. SWMP Review/Changes: This section now requires that when changes are made to site conditions, the SWMP must be revised immediately, except for some BMP description changes which conditionally may occur within 72 hours. This requirement is included to both ensure that the SWMP be kept accurate and up-to-date, and to clarifY that storm water management at a site typically should ·be proactive instead of responsive, and be integrated into site management to ensure it is calibrated with those changes: The section was also clarified to state that only changes in site conditions that do not require new or modified BMPs do not need to be addressed i11 the SWMP. See Part I.D.5(c) of th e permit. 2. SWMP Certification: The previous permit was unclear on a requirement that the copy ofSWMP that remains at the facility had to be signed in accorda11ce with permit signatoJJ' requirements. This requirement has been deleted. The sig11ato1J1 requirement of Part J.F.1 only applies to the SWMP if it is to be submitted to the Divisio11 or to EPA . S ee Part I.F.l of the permit. L. Terms a11d Co11ditio11s. Post-Storm Inspections The previous permit required post-storm i11spectio11s, but did not specify the timing of inspections. This · section now requires that post-storm event inspections generally be conducted within 24 hours of the event. An alternative timeline has been allowed, onlv for sites where there are no constmction activities occurring following a storm event. For this condition, post-storm event inspections shall instead be conducted prior to commencing construction activities, but no later than 7 2 hours following ihe storm event, and the delay noted in the inspection report. Any exception from the minimum inspection schedule is temporatJ', and does not eliminate the requirement t<;> pe1form routine maintenance due to the effects of.a storm event, including mai11tai11i11g vehicle tracking controls and removing sediment flw11 impervious ark as . In many cases, 111ai11tena11ce needs will require a more fl'equent inspection schedule than the minimum inspections required in the pem!it, to ensure that BMPs continue to operate as needed to comply with th e permit. See Part I.D.6(a) of the permit. M Terms and Conditions, Inspections I. The Winter Conditfons Inspection Exclusion section has been modified to include docu111entatio11 requirements for this exclusion. See Part I.D.6 (a) of the permit. The Inspection Scope has been modified to include the requirement to inspect waste storage areas during inspections conducted in accordance with the permit. See Part l.D.6(b) of the permit. 2. Tlie requirements for sites to qualify for reduced inspection fl·eq11e11cies for completed sites have been slightly modified (see Part I.D.6(a)(2) of tlie p ermit,). The require111e11/ now is that only construction activities that disturb the ground swface must be completed. Constmction activities that can be conducted without disturbance oft he ground s mface; for example, interior building construction, and some oil well activities, would not prohibit a sitefl'om otherwise qualifying for the reduced inspection frequency. In addition, the requirement for th e site to be prepared fo1 ;final stabilization has been slightly modified to allow for sites that have no t yet been seeded to qualify; as long as the site has otherwise been preparedforfinal stabilization, including completion of appropriate soil preparation, amendments and stabilization practice. This will allow for sites with seasonal seeding liinitations or where additional seed application may be need ed in the future to still qualify. PART II Permit -Page 29 Permit No. COR-030000 II CHANGES IN THIS GENERAL PERMIT (cont.) 3. The Inspection Report/Records section (Part 1.D.6(b)(2)) was added to clarijji requirementsfor inspection reports generated during 011 inspection conducted in accordance with Part 1.D.6 of the permit. lnspectio11 reports must be signed by the inspector, or the individual verifying the corrective action indicated in the inspection report, on behalf of the permiltee. Inspection reports are not typically required to be submitted to the Division, and therefore, are not required lo be signed and certified for accuracy in accordance with Part 1.F.1 of the permit. However, any inspection reports that are submilted to the Division must follow the signat01y requirements contained in that section. N. Terms and Conditions, Maintenance, Repair, and Replacement o(Conlrol Practices These sections have been added to clarify requirem ents for maintaining the BMPs identified in the SWMP and for addressing ineffective orfailed BMPs. BMP maintenance and site assessment to determine the overall adequacy of stormwater quality management at the site must occur proactively, in order to ensure adequate control of pollutant sources at the site. In most cases, if BlvlPs are already not operating effectively, or lwvefailed, the issue must be addressed immediately, to prevent discharge of pollutants. See Parts 1.D. 7 and I.D. 8 of the permit. 0. Total Maximum Daily Load ([MDL) A section 011 TMDLs has been added. This section gives a general outline of the additional requirements that may be imposed by the Division if the facility discharges to a waterbody for which a stormwater-related TMDL is in place. See Section Vlll.C of the rationale and Part 1.D.J I of the permit. P. Additional Definitions Part I.E of the permit has been modified to remove the definition ofnmoff coefficient, as it is no longer a permit requirement. The defi11itio11for state waters has also been deleted, but can be found in Regulation 61. Q. Changes in Discharge The section on the types of discharge or facility changes that necessitate Division 11otificatio11 has been clarified. See Part II.A. I of the permit. R. Non-Compliance Notification · The section on notification to the Division regm;ding instances of non-compliance has been amended to clarify which types of noncomplia11ce require notification. See Part 11.A.3 of the permit. S. Short Term Certifications The previous permit allowed small short-term construction activities to be authorized for a predetermined periodfi·om 3 to 12 111011ths, and then automatically expire (an inactivation request did not need to be submitted). The issuance of these certifications has led to significant co11f11sio11 and incidents of noncompliance resultingfi·om permittees uninte11tionally letting theil; certifications expire prior to final stabilization, as well as issues regardi11g billing. Therefore, the provisio11sfor short-term certifications have bee11 deleted. T. B}'pass The Division has revised the Bypass conditions in Part II.A .5 of the permit to be consistent with the requirements of Regulation 61.8(3)(i). The revised language addresses u11der what rare occurrences B1\1Ps may be bypassed at a site. PART II Permit -Page 30 Permit No. COR-030000 Ill BACKGROUND As required under the Clean Water Act amendments of 1987, the E11viroumental Protection Agency (EPA) has established a framework for regulating municipal and indu strial storm water discharges. This framework is under the National Pol/11tanl Discharge Elimination System (NPDES) program (Note: The Colorado program is referred to as the Colorado Discharge Permit System, or CDPS, instead of NP DES.) The Water Quality Control Division ("the Division'') has stormwater regulations (5CCR 1002-61) in place. These regulations require specific types of industrial facilities that discharge stormwater associated with industrial activity (industrial stormwate1~, to obtain a CDPS permit for such discharge . The regulations specifically include construction activities that disturb one acre of land or more as industrial jc1Cifities. Constmction activities that are part of a larger common plan of development which disturb one acre or more over a period of time are also included. A. General Permits The Division has determined that the use of general permits is th e appropriate procedure for handling most a/the thousands of industrial stormwater application s within the State. B . Permit Requirements This permit does not fo1pose numeric effluent limits or require s11bmissio11 of effluent monitoring data in the permit application or in the permit itself. The permit instead imposes practice-based effluent limitations for stormwater discharges through the requirement to develop and implement a Stormwater Management Plan (SWMP). The narrative permit requirements include prohibitions against discharges of no11-stormwater (e.g., process wate1). See Part lD.3 of the permit. The permit conditions for the SWMP include the requirement for dischargers to select, implement and maintain Best Management Practices (BMPs) at a permitted construction site that adequately minimize pollutants in the discharges to assure compliance with the terms and conditions of th e permit. Part ID.2 of the permit includes basic design standards/or BMPs implemented at the site. Facilities must select, install, implement, and maintain appropriate BMPs, following good engineering, hydrologic and pollution control practices. BMPs implemented at the site must be adequately designed to control all potential pollutant sources associated with construction activity to prevent pollution or degradation of State waters. Pollution is defined in CDPS regulations (5CCR 1002-61) as man-made or man-induced, or natural alteration of the physical, chemical, biological, and radiological integ rity of water. Utilizing indus!Jy-accepted standards for BMP selection that are appropriate for the conditions a11d poll11ta11t sources present will typically be adequate to meet these criteria, since construction BMPs are intended to prevent the discharge of all but minimal amou11ts of sediment or other polluta11ts that would not result in actual pollution of State waters, as defined above. Howeve1~ site-specific design, including ongoing assessment of BMPs and pollutant sources, is necessmJ1 to ensure that BMPs operate as intended. The permit further requires that stonmvater discharges from construction activities shall not cause, have th e reasonable potential to cause, or measurably contribute to an excursion above any water quality standard, including narrative standards for water quality. This condition is the basis for all CDPS Discharge permits, and addresses the need to ensure that waters of the State maintain adequate water quality, in accordance with water quality standards, to continue to meet th eir designated uses. It is believed that, in most cases, BMPs can be adequate to meet applicable water quality standards. If water quality impacts are noted, or the Division otherwise determines that additional p ermit requirements are necesSGIJ', they are typically imposed as follows: 1) at the renewal of this general permit or through a general permit specific to an industrial sector (if the issue is sector-based); 2) through direction from the Division based 011 the implementation of a TMDL (if the issue is watershed-based); or 3) if the issue is site-specific, through a revision to the certification from the Division based on an inspection or SWMP review, or through an individual permit. PART II Pennit -Page 31 Permit No. COR-030000 III. BACKGROUND (cont.) Some constrnction sites may be required to comply with a Qualifying Local Program in place of meeting several of the specific requirements in this permit. Sites covered by a Qualifying Local Program may not be required to submit m1 application for coverage or a notice of i11activatio11 and may 1101 be required to pay the Division's annual fee. Se? Section VII of the rationale. C. Violations/Penalties Dischargers of stormwater associated with industrial activity, as defined in the CDPS regulations (5CCR 1002-61), that do not obtain coverage u11der this or other Colorado general permits, or u11der an individual . CDPS permit regulating i11d11strial stormwatel', will be in violation of the Federal Clean Water Act and the Colorado Water Quality Control Act, 25-8-101. Forfacilities covered under a CDPS permit,failure to comply with any CDPS permit requirement constitutes a violation. As of the time of permit issuance, civil penalties for violations of the Act or CDPS permit requirements may be up to $10, 000 per day, and criminal pollution of state waters is punishable by fines of up lo $25, 000 per day. IV. STORMWATER DISCHARGES ASSOCIATED WITH CONSTRUCTION ACTIVITY The stormwater regulations (CDPS reg11/atio11s (5CCR 1002-61)), require that stormwater discharges associated with certain industrial activities be covered 1111der the permit program. Construction activity that disturbs one acre or more during the life of the project is specifically i11cluded in the listed industrial activities. This permit is intended to cover most stormwater dischargesfi·om co11structio11facilities required by State regulation to obtain a permit. A. Construction Activity Constmctio11 activity includes ground surface disturbing activities including, but not f imited to, clearing, grading, excavation, demolition, installation of new or improved haul and access roads, staging areas, stockpiling of fill materials, and dedicated borrow/fill areas. Co11structio11 does not include routine maintenance to maintain origi11al line and grade, hydraulic capacity, or original pwpose of the facility. (rhe 111ai11te11ance exclusion is i11tended for projects such as road reswfacing, and where there wilt be less than one acre of additional grou11d ·disturbed. Improvements or upgrades to existing facilities or roads, where at least one acre is disturbed, would not qualify as "routi11e maintenance. ") Defi11itio11s of additio11al terms can be found in Part J.E of the permit. Stormwater discharges fi'om all construction activity require permit coverage, except for operatio11s that result in the disturbance of less than one acre of total land area and which are not part of a larger co111111011 plan of development or sale. A "larger common plan of development or sale" is a contiguous area where multiple separate and distinct construction activities may be taking place at difleren(times on different schedules. · B. Tvpes o(Discharges!Activities Covered 1. Stonnwater: This permit is intended to cover most new or existing discharges composed e11tire/y of stonmvaterfi'om construction activities that are required by State regulation to obtain a permit. This includes storm water discharges associated with areas that are dedicated to producing earthen materials, such as soils, sand, and gravel,for use at a single construction site. These areas may be located at the construction site or at some other location . This permit does 1iot authorize the discharge of mine water or process waterji-0111 borrow areas. This permit may also cover stormwater discharges associated with dedicated asphalt plants and concrete plants located at a specific construclion site. PART II Pennit -Page 32 Permit No. COR-030000 IV. STORMWATER DISCHARGES ASSOCIATED WITH CONSTRUCTION ACTIVITY (cont.) 2. Process water: U11der certai11 restrictio11s, discharges to the ground from construction dewatering, · and from concrete washout activities, are also covered (see Parts I.C.3(c)(7), J.C.3(c)(8), I.D.3(c) and lD.3(d) of the permit). C. Types of Activities NOT Co\lered 1. Stonmvater: Aside from the sources listed in subparagraph B. l, above, this permit does not cover stonmvater discharged from constmction sites that is mixed with stomiwaterfrom other types of i11dustrial activities, or process water of any kind. Other types of industrial activities that require stornnvater discharge permits pursuant to differe11t sections of the regulations (Regulation 5 CCR I002-6I, Section 61.2(e)(iii)(A-l, K)], are not covered by this permit. 2. Process water: This permit also does not cover any discharge of process water to s111face waters. If the construction activity encounters groundwater, in order to discharge this groundwater to swface waters, a Construction Dewatering Discharge Permit (permit number COG-070000) must also be obtained. An application for 1i1is permit can be obtainedfiwn the Division at the address listed in Part I.A.4(a) of the permit, or at the website in Section I of th e rationale. V. COVERAGE UNDER THIS GENERAL PERMIT Under this general permit, owners or operators of stormwater discharges associated with construction activity may be granted authorization to discharge stormwater i11to waters of the State of Colorado. This includes storm water discharges associated with industrial activity from areas that are dedicated to producing earthen materials, such as soils, sand and gravel, for use at a single construction site, and dedicated asphalt plants a11d dedicated concrete plants. This permit does not pre-empt or supersede the authority of other local, state orfederal agencies to prohibit, restrict or control discharges of stormwater to storm drain systems or other water courses within their jurisdiction. Authorization to discharge under the permit requires submittal of a completed application form and a certification that the SWMP is complete, u11less the site is covered by a Qualijj•ing Local Program. Upon receipt of all required information, the Divisio11 may allow or disallow coverage under the gen eral permit. VI. APPLICATION AND CERTJFICATION At least ten days prior to the com111e11ceme11t of co11sti·11ctio11 activities, the owner or operator of the construction site shall submit an original completed application which includes the signed certification that the SWMP is complete. Origi11af signatures are required for the application to be considered complete. For small construction sites only, if the site is covered by a Qualifying Local Program (see below), submittal of an application is not required. For the purposes of this permit, the "operator" is the person who has day-to-day control over the project. This can be the owner, the develope1~ the general contractor or the agent of one of these parties, in some circumstances. At different times during a construcUon project, different types of parties may satisfji the definition of "operator'.' and the certification may be transferred as roles change. (Note -Under the Federal regulations, this application process is referred to as a Notice of Intent, or NOl For intemal consistency with its current program, the Division will continue to use the term "application. ")A su11111ra1y of the permit application requirements isformd in the permit at Part 1.A.4(b). If coverage under this ge11e1•al permit is appropriate, then a certification will be developed and the applicant will be certified under this general permit. PART II Pennit -Page 33 Pennit No . COR-030000 VII QUALIFYING LOCAL PROGRAMS For stormwater discharges associated with small co11str11ctio11 activity (i.e., one to five acre disturbed area sites), the permit includes conditions that incorporate approved q11alifyi11g local erosion and sediment control program (Quali.fj1ing Local Program) requirements by reference. A Qualifying Local Program is a 11111nicipal stormwater program for storm water discharges associated with s1iwl! c onstruction activity that has been formally approved by the Division. The requirements/or Q11a/ijj 1i11g Local Programs are outlined in Part 61.8(12) of the Colorado Discharger Permit System Regulatio11s (also see the Division's "Qualifying Local Programs for Small Construction Sites -Application Guidance"). Such programs m11sl impose requirements to protect water q11ality that are at least as stringent as those required in this permit. A. Approval Termination A Qualifj1i11g Local Program may be terminated by e ither the Division or the municipality. Upon termi11atio11 of Division approval of a Q11alijj1i11g Local Program, any small construction activity required .to obtain permit covemge tmder Section 61.3(2)('1) oftlte CDPS regulations (5CCR 1002-61), shall submit an application form as provided by lite Division, with a certification that the Stormwater Management Plan (SWMP) is complete as required by Part I.A.3 of th e permit, within 30 days of Division 11otification. B. Approval Expiration Division approval of a Q11alifj1i11g Local Program will expire with this general permit on June 30, 2012. Any municipality desiring to continue Division approval of their program must l'eapply by March 31, 2012. Tlte Divisio11 will determine if the program may continue as a approved Qualijj1i11g Local Program. VIJJ. TERMS AND CONDITIONS OF PERMIT A. Coverage under a QualifWng Local Program -For Small Co11stmctiou Sites On(v For small construction sites (disturbing less than 5 acres) covered under a Q11a/ijj1i11g Local Program (see Section VIL above), 011/y certain permit requirements apply, as outlined below. The local program 11111st /Jave been formally ((esignated by the Division to qualifj1. Most municipalities have some type of local program and may req11ire permits and fees. However, simply '1avi11g a progrnm i11 place does not necessarily mean that it is a qualifj1i11g program and tltat a State permit is not required. The local municipality is responsible for notifjiing operators and/or owners that they are covered by a Qualifj1i11g Local Program. As of May 31, 2007, the only approved Q11alifj 1ing Local Programs within the state are/or Golde11, Durango and Lakewood. An updated list of municipalities with Qualifj1ing Local Programs, including contact information, is available on the Division's website at: http ://w 1 v1 v. cdphe. state. co.11s/111q/ P em 1 its Un ii Is I om 1 water/ c011struct ion.html. The Division reserves the right to require any co11s/J ;uctio11 owner or operator within tlte jurisdiction of a Qualijj1i11g Local Program covered under this permit to apply for and obtain coverage under the full requirements 'of this permit. 1. Permit Coverage: If a construction site is witlti11 the jurisdiction of a Qualifj1i11g Local Program, th e owner or operator of the cons/ruction activity 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 to submit m1 inactivation notice or payment of an annual fee to the Division. PART II Permit -Page 34 Permit No. COR-030000 .. VIII. TERMS AND CONDITIONS OF PERlvUT (cont.) 2. Permit Terms mu/ Conditions: The permittee covered by a Q11a/ifj1ing Local Program must comply with the requirements of that Qualifying Local Program. In addition, the following permit sections are applicable: a) Parts I.A. I, l.A.2, and J.A.3: Authorization to discharge and discussion of coverage under the permit. b) Part /.D. I: General limitations that mu s t be met in addition to local requirements. c) Parts I.D.2, I.D.3, I.D.4: BMP implemen tation, prohibition ofnon-stormwater discharges unless addressed in a separate CDPS p ermit, and requirements related to releases of reportable quantities. d) Part l.D. I I: Potential coverage under a Total Maximum Daily Load (I'MDL). e) Part I.E: Additional definitions. j) Part fl (except for Parts JI.A. I, Il.B.3, Il.B.8, and /J .B. JO): Specifically includes, but is not limited to, provisions applicable in tire case of 11011complia11ce with p ermit requirements, and requirements lo provide information an d access. B. Stormwater Ma11ageme11t Plans (SWMPs) Prior to commencement of construction, a ston111vat er management plan (SWMP) shall be developed and implemented for each facility covered by this permit. A certification that the SWMP is complete must be submitted with the permit application. The SWi\1P shall identijj1 potential sources of pollution (including sediment) which may reasonably be expected to affect the quality of stormwater discharges associated with construction activity fi·om the facility. In addition, the plan shall describe the Best Management Practices (BMPs) which will be used to reduce the pollutants in stormwater discharges from the construction site. {Note that permanent stormwater controls, such as p onds, that are used as tempormy construction BMPs must be adequately covered in the SWMP.) Facilities must implement the provisions of their SWMP as a conditi01I of this permit. The SW.MP shall include th e following items: 1. Site Description 2 . Site Map 3. Stormwater Management Controls 4. Long-term Stonmvater Management 5. Inspection and Maintenance (See Parts J.B. and I. C of the permit for a more detailed description of SWMP requirements.) The Divi~ion has a guidance document available 011 preparing a S WMP. The document is included as Appendix A of the permit applicatioi1, and is available on the Divisio11 's website at ww11'.cdphe.state.co. us/1vq/PermitsU11it. Some changes have been made to the SWMP requirements. See Section II.I of the rationale for a discussion on permittee responsibilities regarding those changes . . VIII TERMS AND CONDITIONS OF PERMIT (cont.) MasterSWMP PART II Permit -Page 35 Permit No. COR-030000 Often, a large construction project will involve multiple smaller construction sites thal are within a common plan of development, or 11111/tiple well pads under construction within an oil a~1d gas well field.· Po/!11tal1t sources and the types of BMPs used can be relatively c onsistent in such cases. A permittee could · significantly streamline the SWMP development process through the use of a master SWMP. SWMP information must be developed and maintained/or all construction activities that exceed one acre (or are part of a common plan of development exceeding 011e acre) conducted within the permitted area. By developing a single master plan, the permittee cm1 elimi11ate the need to develop repetitive information in separate plans. Such a plan could include two sections, one containing a reference section with information applicable to all sites (e .g., installation details and mah1te11a11ce requirements for many stcmdprd BMPs, such as silt fence and erosion blankets), and the second co11taining all of the information specific to each site (e.g., site BMP map, drainage plans, details/or BMPs requiring site specific design, such as retention po11ds). As new activities begin, information required in the S ~VMP is added to the plan, and as areas become finally stabilizec/, the related informatio11 is removed. Records of information related to areas that have been finally stabilized that are removed from the active plan must be maintained for a period of at least three years from the date that the associated site is finally stabilized. C. Total Maximum Dailv Load (T!vIDL) If the designated use of a stream or water body has been impaired by the presence of a pollutant(s), development of a Totat'Maxi11111111 Daily Load (TMDL) may be required. A TMDL is an estimate of allowable loading in the waterbody for the pollutant in question . Types of discharges that are or have th e potential to be a significant source of the pollutant are also identified. If a TMDL has bee11 approved for a11y waterbody into which the permittee discharges, and stonmvater discharges associated with construction activity have been assigned a pollutant-specific Wa steload Allocatio11 (WLA) under the TMDL, the Division will either: 1. Notijj1 tile permittee of the TMDL, and amend the permittee's certification to add specific BMPs a11dlor other requirements, as appropriate; or 2. E11sure that the T1\1DL is being implemented properly through alternative local requirements, such as by a municipal stonmvaterpermit. (The only curre11t example of this is the ChenJ' Creek Reservoir Control Regulation (72.0), which mandates that municipalities within the basin require specific BlvfPs for construction sites.) See Part I.D .1 l of the permit for further information. D. Monitoring Sampling and testing of stonmvaterfor specific parameters is not required on a ro11tine basis under this permit. However, the Division reserves the right to require sampling and testing on a case-by-case basis, in the event that there is reason to suspect that complia11ce with the SWMP is a problem, or to measure the effectiveness of the BMPs i11 removing pollutants in the effluent. See Part /.D_J (e) of the permit. E. Facility Inspections Construction sites typically must inspect their stormwater management controls at least evelJ' 14 days and within 24 hours after the end of any precipitation or snowmelt event that causes swface erosion. At sites or portions of sites where ground-disturbing construction has been completed but a vegetative cover has not been established, these inspections must occur at least once per month. (At sites where persistent snow cover conditions exist, inspections are not required during the period that melting conditions do not exist. These PART II Permit -Page 36 Permit No. COR-030000 VIII. TERMS AND CONDITIONS OF PERMIT (cont.) conditions are only expected to occur at high elevations within the Colorado mountains.} For all of these inspections, records must be kept on file. Exceptions to the inspection require111e11ts are detailed in Part ID.6 of the permit. F. SWMP Revisions The permittee shall amend the SWMP whenever there is a change in design, co11structio11, operation, or maintenance of the site, which would require the imple mentation of new ~r revised BMPs. The SWMP shall also be amended if it proves to be ineffective in aclzievi11g the general objectives of controlling pollutants in stormwater discharges associated with construction a c tivity. The timi11gfor completion of SWMP changes is detailed in Parts I.D.5(c) and /.D.5(d) of the permit. SWMP revisions shall be made prior lo change i11 th e field, or in accordance with Part l.D.5(d) of the permit. G. Reporting The inspection record shall be made available to the Division upon request. Regular submittal of an annual report is not required in this permit. See Part I.D .9 of the permit. H. Annual Fee The permittee is required to sub111il payment of an annual fee as set forth in the Water Quality Control Act. Permilfees will be billed for the initial permit fee within a few weeks of permit issuance and then an1111ally, based 011 a July 1 through June 30 billing cycle. /. Responsibility for Permit The permit certification for a site may be inactivated, once coverage is 110 longer needed. The certification may be transferred, if another party is assuming responsibility for the entire area covered by the certificatiOn. In addition, permit responsibility for part of the area covered by the certification may be reassigned to another party. These actions are summarized below. The Stormwater Program construction fact sheet e>.plains these actions in further detail unde r the section 011 Multiple Ow11er!Deve/oper Sites, and is available on the Division website at http:llll'll'lv.cdphe.state.co.11s/1vq/PermitsU11itlstom11va te1·/ConstFactSheet.PDF. Section F . I. Inactivation Notice: When a site has been finally stabilized in accordance with the SWMP, the permittee shall submit an I11activatio11 Notice tltat is signed in accordance with Part I.F.1 of the permit. A summmy of the Inactivation Notice content is described in Part /.A .6 of the permit. A copy of the Inactivation Notice form will be mailed to the permittee along with the permit certification. Additional copies are available from the Divis ion. Fol' sites where all areas have been removed from pel'mit covel'age, the permittee may submit an hwctivation notice and terminate permit coverage. In such cases the permittee would 110 longer have any land covered under their permit certificatio11, and therefore there would be no areas remaining to finally stabilize. Areas may be removed from permit coverage by: -reassignment of permit coverage (Part lA.8 of the permit); -sale to homeowner(s) (Part l.A.9 of the permit); or -amendment by the permittee, in accordance with Divisio11 guidance for areas where permit coverage has been obtained by a new operator or returned to agricultural use. PARTH Permit -Page 37 Permit No. COR-030000 VIII. TERMS AND CONDITIONS OF PERMIT (cont.) 2. Tm11sfer of Permit: Wizen responsibility for stonmvatel' discharges for an entire construction site changes from one individ11al to another, the permit shall be transferred in accordance with Part I.A. 7 of the permit. The pel'mittee shall s11bmit a completed Notice of Tram.fer form, which is available from the Division, and at www.cdphe.state.co.11s/wq/Per111itsU11it. If the new responsible party will not complete the ll'ansferform, tlze permit may be inactivated if the permittee has no legal respo11sibility, thro11gh ownership or contract, for the construction activities at the site. In this case, the new owner or operator would be req11ired to obtain permit coverage separately. 3. Reassignment of Permit: When a permittee no longel' has control of a spec(fic portion of a permitted site, and wishes to trans/el' coverage of that portion of the site to a second party, the permit tee shall s11bmit a completed Notice of Reassig11111e11t of Permit Coventge form, wliich is available .from the Division, and at w11 111'.cdphe.state.co.11s/wq/Per111itsU11it. The form requires that both the existing pel'mittee and new permittee complete their respective sections . See Part I.A.8 of the permit. J. Duration of Pel'mit The general permit will expire 011 June 30, 2012. 111e permittee's authority to discharge under this pel'mif is approved u11til the e.,piratio11 date of the ge11eral permit. Any permiltee desiring continued coverage under the general permit past the expiration date must apply for recertificatio11 under the general permit at least 90 days prior to its e.\piratio11 date. IX PUBLIC NOTICE -I 2122/06 Kathleen Rosow December 18, 2006 The permit was sent to public notice on December 22, 2006. A public meeting was requested, a11d was held on February 2, 2007. Numerous comments were received 011 the draft permit. Responses to those comments, a11d a summmy of changes made to the draft permit, are in a separate document entitled "Divisio11 Response To Public ' Comments." The permit will be sent to a second public notice 011 March 23, 2007. Any changes resulting from the second public notice will be summal'ized i11 the rationale. X PUBLIC NOTICE -3123107 Kathlee11 Rosow March 22, 2007 The permit was sent to public notice for a second time on March 23, 2007. Numel'ous comments were received 011 the second draft permit. Responses to those comments, and a s11111111my of the additional changes made to the draft permit, are contained in a separate document entitled "Division Response To Public Comments Part II". This document is part of the rationale. Any cha11ges based 011 the Division response are incorporated into the rationale and permit. The response document is available online at http://1v1v1v.cdphe.sta1e.co.11s/wq/PermitsU11it/stom1111ater/co11stn1ction.ht111/, or by emailing cdphe.wqstom1@state.co.11s. or by calling the Division at 303-692 -35 17. Kathleen Rosow May 31, 2007 c 0 cc 1U >< g ·-__J "C "O c: c cu cu c. a. c. cu <C ~ ........ ·-Cf) met ers 100 en ·-ro ...... Q) 0 0 !.... ...... i c 0 () Q) ...... I c ·- 0 Cl) ·-...... en (.) (.) 0 Q) !.... '() w !.... >< "'O a.. ·-c Q) "'C ro ..c c: en ...... Cl) Q) !.... (.) 0 Q. ·-'+-Q. t5 "'O ro Q) <C !.... en \ a.. 0 ...... a. c 0 Q) !.... E a.. Q) O> ro c I ro I ~ I Cl ea n Runoff St a rt s w ith Yo u Environmental Pe rmit s ni:;tn1ct1on sit es. The SWM lnclucJ es OMf)s l prevent po ll ut10 11 that result:. fr orn ns trucllon and rom ac tiv iti es, ., '"1' Why Do We Nee d to Control Erosion and Sediment Losses from Construction Activities? Maintain Your BMPsl How to Keep Our Waters Clean \<.J d 1 ·---' I Minim ize disturolng existing vegetation . • Stabilize disturbed aroas as soon as po$Slble . • Inspect 81\IPs on fictive construction sites al least every l.4 days and within 24 11ours arw tfle end a11y psOcffliteillon or snow tnelt eveol that causes surface erosion and document U1e rospcctions 11 ispect BMPs 0111nact!ve construct ion sites evor} 0 days e11ct document t t1e l11specUons u11tll u1e st.orrnwale 1 permits are Inactivated . • li nrnedlately 1e1iatr any BMPs that hav e falled . • l<eep stonnwater documentation on the construction site (I .e., pen nil; SWMP and any up<lates to the plan ; and all lnspec llo n reports). SWMP changes shall b rnacJe in most cases lmmedfale l • BMPs ll1a1 are no longei necessar y should be removed . For e~ample. silt fence can bG 1emoved round an <Jrea that nas '1ccn seeded onrt lhe vegetallon t1 as ge1rninated . The lbllowlng Items are avallable 1or referenc e In the CDOT project field office: • r.001 Speciflcattons • M & S Standard Plans 01 Ero sion Conlr()I and Slo1mwatet Qu~llty Gu • 1'0P) of Biological Opinion. If avaflable • r em11 ts • Spllf Prevenlion Plan More Information on Best Management Practices Tl1e speci fications for BMPs Inc lude d 111 a stormwater management plan are listed in CDOl''s S tandatd Speail7catlons for Road ana B1 ldge Consu uctron 'Sections 107.25, 208. 212, 213, 216 and any special p10visfons the p1oject may /1ave), COOT M & S Standards M-208 1. and Stormwate1 Management Pfarr details. tn addition, fnfonnat1011 on BMPs can be obtained from CD01 Erosion Contro l and Storm1Vate1 Qua lity Guicle . All documents can be downloa el ect from www.cdoth 2o.com. Co nt act you r sup ervisor or pr ojec t e ngi nee r if yo u have any questions about the SWMP 01 tho lt1stalfat 1on anti mainten anc e of BMPs. CDOT Standard Spec ifications for Road and Br idge Construction Section 107.25 details 1)ractfces tha1 minimize water pol lut ion dU(lng consm1ct lon . Thi~ section also addresses who is rosponslb te for any vloli'JUons and rtii es. Soctton 2.08 deta!ls eroslo11 conttols fa construction siles . This section desorlbes BMP s end penalties fo r railing to conLtol etoslbn . Sootlon ~l.~ addresses seeding, fertilizer, soil conditioning and sodding requirements on construction sites. SecttQlll 13 details mulchfng requlremems . Soqtion 216 addresses soil reteqtlon coverlni:t fo r erosion conttol on construction sites. ~@ llll~®ll'il li>e rim et e v Co ntrols •••••••••••••••••••••. ~. Construction Safety Barrier Fencing ............. 2 Berms and Diversions •.••..........•......•.. 2 Slit Fence .....................•............ 4 Stabllizecl Construction Entrance ............... 7 fi!:>cposed J.\reas •••••••••••••••••••••••• :i.1 Surface Roughening .............••...•...... :1.2 Mulching .................................. 12 Mulch Tacklfler ............................. 1 4 Seeding ................••..•.....•..•..... 15 Soll Binders •..........•......•.••...•..•••. 16 Slopes ............................... 1 7 Tracldng ........................•.••.•..... 18 Slit Fence or Other Barriers •......•..........• 19 Soll Retention Blanl<ets ..........•........... 20 Embanl<rnent Protector ........•......•...... 25 btcttct s , ,, t • ~ e • .i ,,, • , ......... ,,. • ~ ~ •• , .. ._ ~ •• " .29 Checl< Dam •..••....•...••.•..•..•......... 30 Erosion Bale Chee/< Dam ................... 31 Erosion Log Cilecl< Dam. . . . . . . . . . . . . . . . . . . 33 Temporary Roel< Chee/< Dam. . . . . . . . . . . . . . . 35 Silt Dil<e C/lecl< Dam. . . . . . . . . . . . . . . . . . . . . . 36 Silt Berm Chee/< Dam ..................... 38 Soll Retention Blanl<ets for Ditch Use •......... 39 I n l e t a nd Ou t l et Pr otecti o n ••••••••••••• .41 Inlet Protection ..................••.•....... 42 Erosion Logs ............................. 42 Concrete Blocks and Roel<. ..............•. 44 Erosion Bales . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Roel< Socl<. .............................. 47 Outlet Protection ..•.................•......• 48 Sediment Trnps and Basins •••••••••••.•• 51 Te mporary Sediment Traps and Basins ......... 52 Pollution Prevention ................... !f · Co ncrete Washout Structure .•........••••..•. 56 Co nstruction Site Liquid and Soli d Waste Management ..............••.... 59 Spill Prevention and Control . . . . . . . . . . . . . . . 62 Clean Up Response Procedures . . . . . . . . . . . . 62 Stocl<plle Management ...•..............•.•. 64 Street Sweeping and Vacuuming ...•....••••.. 66 .. •p:!tidal (~ommimw . . . .... , . . . . . • . . 61 D~waterlng Structure ..................•..... 68 lm p or tcm t Number s ••••••••••••••••.••• 7:.. ·......._ Contents Construction Safety Barrier Fencing ...... 2 Berri1s and Diversions .................. 2 Silt Fence ........................... 4 Stabilized Construction Entrance ........ 7 :1 e ll'um ~'1 e ll' ~®111r~li'4l>b Perimeter controls are used to control sediment- laden runoff from leaving a construction site and define the constructing perimeter and sensitive areas. It is Important that perimeter controls are in place before any earth-moving activities begin. Construction Safet y Ba rri e r Fencin g Construction safety barrier fencing (orange fencing) should be used to protect wetlands and other sensitive areas from construction traffic. ,..~ ::. 1 ,.. ' . .. . ' . ~ " 'I -• ! _!' • J .• ' ) •, .. ~,fl ) C ~! . ~ ·~;. -.... ; . This Is an excellent example of construction safety barrier fencing. It Is used liere to prevent veliicles from damaging existing vegetation and minimize environmental impacts. Berms and Diversio ns A gravel, stone, or soil berm or d iversion is a temporary ridge that slows and filters flow and diverts stormwater from an open traffic area or slope. Clean water diversions are designed to intercept and divert upland runoff around bare soil areas. Berms and ditches diverting clean upland runoff around construction sites reduce erosion and sedimentation problems. Seed berms and ditches after construction. Tips • Repair and inspect often for breaches. • Berms shall have a minimum height of 18 inches, side slopes of 2:1 or flatter, and a minimum base width of 4.5 feet. • Berms should not be used in hlgtHraffic areas where they will be continually run over. 0 Do not run berms down a slope; watch for concentrated flows when tl1e berm directs water to one area. This is an excellent example of a soil ·berm. The soil is compacted and there are no breaks in the berm . Poor example of a berm . The berm is not compacted. ~·~ This is an excellent example of a clean water diversion pipe . The pipe sliould have a minimum capaoity. to convey tl1e runoff expected from a 2-year frequency storm. '· ,._ I-O'Mlll -~ 10" S[ITL(l.!(llT. ~ .~,!'.F~E~Dl.L_ __ · ..... .-::~ \ OES IGll FLO'H O(PTll ~-~· PARABOLIC DIVERSIO N . -.-.. ; ... ·:---· 1or. SETILCMEtlT ~· 6"f".:_E ~~ i .L_ ,,~, ". ".. OES 1Gtl FLO",Y '"· OEPTH " .. "\'. f. '. '.,,.:.' l).\ :.·-:. "' ~#. TRAPEZOIDAL DIVERSION Oil SEffiCMENT ~ 1 ~ 6'FREEBOAAO L L_ __ x .. • "· · · . ' . -:-;~--- V-SHAPED DIVERSION Sil t Fence Silt fe nces are used as temporary perimeter controls around sites where construction activities will disturb the soil. They can also be used around the interior of the site, such as at the toe of slopes or piles of fill. A silt fence consists of a length of filter fabric stretched betwe en anchoring posts spaced at regular intervals. Wh en installed correctly and inspected frequently, silt fen ce s can be an effective barrier to sediment leaving the site in stormwater runoff. 'flps • Install silt fence along contours to avoid concentrated flows. Concentrated flows could cause silt fence failure. 0 Silt fence shall be installed prior to any grubbing or grading activity. Along the toe of fills, install silt fence along a level contour and provide an area behind the fence for runoff to pond and sediment to settle. Silt fence should be installed approximately 5 feet away from the toe of the fill when feasible. • Sediment shall be removed from behind the silt fence when it accumulates to one half the exposed filter fabric height and shall be disposed of properly. • Maximum drainage area is one-quarter acre per 100 feet of silt fence length. 0 Sil t fences shall be removed when they have served their useful purpose. • The area wi°th silt fence sl1all be stabilized after removal of the fence. • Do not place silt fence In or adjacent to existing wetlands where trenching could impact the wetlands . • Do not install silt fence in or across state waters. • Silt fence does not worl< well in rocl<y soils or where high winds are prevalent. Very good Ins tallation of silt fence. Good periri1eter • control to define work area and protect existing p}ants with construction safety barrierfencfn¥_and silt fence. When joints are '-{f;}) necessary, filt er clot/J s/Ja// be spliced toge tiler only at a sLJpport post and secLJrely sealed. ~ii:.~( A.'.'l:Hi:':'"tO N lF'L\(H--.... ·~·•, .. ,J~l.J.Y SILT FENCE nc=• """"---'- Poor ma inte nance of sift fence . Sediment s/Jould be removed from be/Jind tile silt fence when it accumulates to one half the exp osed filter fabric height. Silt fence should not be installed in state wat ers. Stabili zecl Construction Entrance The purpose of stabilizing entrances to a construction site is to minimize the amount of sediment leaving the area as mud attached to vehicle tires. As a vehicle drives over the construction entrance BMP, the BMP removes mud and sediment from the tires and reduces soil transport off tl1e site. Geotextile separates the gravel from the soil below, l<eeping the gravel from being ground Into the soil. The geotextile also reduces the amount of rutting caused by vehicle tires by spreading the vehicle's weight over an area larger than the tire width. Tips • Clean up mud or dirt tracl<ed onto paved surfaces the same day. • Damaged curb, gutter, or sidewall< should be replaced. • Mal<e sure all vehicles use the stabilized construction entrance. • Replace and/or add aggregate as needed to prevent tracl<ing mud and debris into the street. An excellent installation of a construction entrance. Poor installation of a construction entrance. It is not 70 feet long. Refer to the Stabilized Construction Entrance Geotextlile table below for details . 0-::~--.-r-- i'_ ·\_, ..v.:.· coa rse aggregate existing paved road Stabilized Construction Entrance Geotextlle Si eve Size Percent by Weight Passi ng Square Mesh Sieves 75 mm (3 Inch) 100 50 mm (2 inch) 95-100 19.0 mm W• Inch) 0 ·15 A EXI STING I PAVEMENT COARSE AGGREGATE pl.AN VIEW * SHAU E:XTEtlD fULL V1lOTH OF INGRESS AND EGRESS OPERATION .. EXISTING 1 · 70' l.lltl. . ·1 '"l"~ ,~~r ~~ . . <~. '/ ..... • EXISTING GEOTEXTILE PAVD.iENT (EROSIOll CO:-iTROL) (DEPTH VARIES) ELEVATION SECTION 1 1t>.11N.I EX ISTING 6" GROUND -~J •v;;9,>i*'~W'K_~/~'i'«@~''7»'' :?Z\ --. ·" ,"'t>i GEOTEXTl~E (EROSION CONTROL) SECTION A-A STABILIZED CONSTRUCTION ENTRANCE . NOTE : THE CONTRACTOR SHALL PROTECT mi CURB AND GUTTER THAT CROSSES TttE ENTRANCE . PROTECTION Of THE CURB AND GUTTER \'/ILL NOT BE PND fOR SEPARATELY , BUT SHAL L BE INCLUDED IN THE \'/ORK . )'!~})(f))§®d l~lt ®«!I§ Contents Surface Roughening ................. , 12 Mu lching ...... ,·. ·, ......•............ 12 Mulch Tacl<ifier ...................... 14 Seeding ............................ 15 Soil Binders ......................... 16 ~~;,posed s Acco rding to CDOT Specifications, "the duration of t he exposure of uncompleted construction to the elements shall be as short as practicable." Removing vegetation and topsoil can quicl~ly result in erosion. Surface Roughening Sur face roughening involves roughening a bare soil sur fac e. Surface roughening is used as a temporary BM P t o reduce. the speed of runoff, increase Infiltration, red uce erosion, trap sediment, and prepa re the soil for se edin g and planting by capturing moisture for seed. Su rface roughening should be used in conjunction with BMPs such as mulching, seeding, or tackifier an d should be along the contour of slopes. Surface rou g hening is different that tracking (see pg. 18). Excellent example of surface roug/1en ing along the contour of the slope . Mulc h Ing Mu lch ing is an erosion control practice that uses ce rtified weed free hay or straw for temporary sta bil ization of slopes and exposed areas when seeding cannot occur due to seasonal constraints. Mulching can also be used for newly seeded areas. 'i'lll§ • ·Mulch must cover the entire site with no bare areas and should be applied within 4 hours of seeding. • Mulch depth should be between 1 and 2 inches. • Hay at 1.5 tons per acre is preferred to straw at 2 tons per acre. • Mulch should be anchored by mechanically crimping the liay/straw followed by mulch tacl<ifier for disturbed areas. • Mulch should not be applied when windy conditions are present. Excellent mulc/1 application . Crimp forage mulch into loosened soil .. Fibers should stand upright. Poor mulch installation. Not enough mulch was applied and it was not anchored to the soil, w/Jic/J left bare areas. Mulch Tackifier Mulch tacl<ifier used over mulch stabilizes areas where vegetation cannot be established and provides immediate protection. It is also used to hold mulch in place and minimize erosion from runoff and wind. Yips • Product is water-soluble and must be reapplied 6 to 12 months after Initial application if plants have not germlninated and stabilized the soil. • Mulch tackifier should be applied within 4 hours of mulch applications. • Do not apply during precipitation events, over snow, or high winds. Poor mu/ell tackifier application. Not enoug/J mulch tackifier was applied. Mulch tackifier should be applied wit/Jin 4 hours of mulch applicatio11 to /10/d mulch in place. Seed in g Seeding is used to control runoff and erosion on disturbed areas by establishing vegetative cover. It reduces erosion ancl sediment loss and provides permanent stabilization . 1'1!l 6 • Prepare seed bed by loosening surface to a minimum depth of 4 inches. • Perform all clrill seeding operations with the slope contour. • Mulch and mulch tacl<ifier or blanl<ets should be applied immediately, but no more than 4 hours after seeding. • The area should be re-seeded if the seeded areas fail to establish, provide adequate ground coverage, or is disturbed. • Seeding should occur throughout the duration of the project as construction is completed, during each growing season. • Seeding should only tal<e place during the seeding seasons listed in the Seeding table . Seeding outside the seasona l constraints may cause seeding failures. Prepare soil and, If required, incorporatf) topsoil or sol/ conditioning. Drill seed rows must be parallel to contours (along grade). Seeding Zone Spring Seeding Fall Seeding Areas other tl1a11 tl1e Western Slope Be low 6,000' Spring thaw to September 15" until Jun e 1" consistent ground fre eze 6,000' to 7,000 ' Spring thaw to Septe mber 1" until June 1" consistent ground freeze 7,000' to 8,000' Spring thaw to August 1" until July 15"' consistent ground freeze Above 8,000' Spring thaw to cons istent ground freeze Western Slope Below 6,000' Spring thaw to May 1" August 111 until consistent ground freeze 6,000' to 7,000' Spri ng thaw to September 1" until June 1" co nsistent ground freeze Above 7,000' Spring thaw to consistent ground freeze So i l Binders Soil binders, also lmown as chemical stabilizers, provide temporary so il stabilization. Soil binders are sprayed onto the surface of exposed soils to hold the soil in place and minimize erosion from runoff and wind. Soll binders in combination with mulches are used to temporarily stabilize soils in stockpiles, berms, or when slopes cannot be seeded due to seasonal constraints. These materials can stabilize areas where vegetation cannot be established and provide immediate protection. Tips • Apply soil binder over rougt1ened soil surface. • Rill erosion indicates poor product mixture and/or application. • Reapply at least every 6 to 12 months or when the surface has been disturbed again. • Use soil binders on stockpiles to reduce wind erosion. • Do not use in areas with vehicular traffic. Once t he surface is broken, the soil binder must be reapplied. Slopes Contents Tracl<ing ............................ 18 Silt Fence or Other Barriers ............ 19 Soil Retention Blanl<ets ............... 20 Embanl@ent Protector ................ 25 Slopes Slopes-especially steep and/or long ones-must be protected to prevent sheet, rill, and gully ero s ion . Slopes should be stabilized immediately after grading worl< is completed . Soil retention b lankets are needed on most slopes steeper tha n 3:1; depending on soil types. Protecting slop es from erosion requires several actions that m ust be tal<en together. No single approach will b e successful, especially if the slope is long, steep, or has highly erodible soils. If slopes are brol<en up into benches or steps, runoff can be collected and diverted to cha n nels that lead to a pipe or to open channel em banl<ment protectors that have stable outlets. Combine the following BMPs with seeding and mu lching to protect slopes. See the Seeding and Mu lc hing BMPs in the Exposed Areas chapter for deta ils and tips. Tracking Tra cl<ing involves roughening a bare soil with horizontal g rooves using construction equipment to tracl< the su r fa ce. Tracl<ing recluces ru noff velocity, increases infil tration, and reduces erosion . Tracl<lng should al ways be used in conjunction with ott1er BMPs such as mul ch ing, s eeding, or mulch tacl<ifier. Tip s • Trac i< the slope when it is completed . Si lt Fence o r Other Barriers Silt fence or other barriers should be installed approximately 5 feet from the toe of the slope or slightly away from the toe, and every 75 to .125 feet apart .on long slopes. Silt fences do not have to be on the property line. Stagger fence sections to ensure total ·overage. Repair as needed, and remove when grass _is 1ell established. Erosion logs installed on the contour work very well in breal<ing up flows on tong slopes. See Perimeter Control chapter for Silt Fence installation details and tips . Slit fences sl1ould be installed on l/1e contour below bare sol/ areas. Use multiple fences on long slopes. Remove accumulated sediment before It reaches halfway up the fence. Soil Retention Blankets Steep slopes shall be protected with soil retention blanl<ets. Soil retention blanl<ets are placed on the soil in disturbed areas to control erosion, retain sediment resulting from sheet-flow runoff, and protect newly seeded areas. When properly applied, soil retention blankets completely cover the ground surface. Blanl<et type is detailed in the Slope Treatment table. Yips • The ground should be smooth, with no large rocl<s, vegetation or rilling on the surface, before placing blankets. • Areas where blanl<ets are to be used shall be property prepared wit11 topsoil or soil conditioning, and fertilized if required, and seeded before the blankets are placed. • The blankets shall be placed smoothly but loosely on the soil surface without stretching. • Re -anchor loosened matting and replace missing matting and staples as required. •. Blankets at the top of the slope and every 35 feet shall be trenched in 6 inches wide by 6 inches deep. • Trenching at the top of the slope should be beyond the crest of the slope to avoid undercutting. Steep, long slopes need blankets . Install blankets up and down long slopes . For channels belol'I slopes, Install l1orlzontal/y. Don't forget to apply seed and fertilizer(if necessary) before installing blankets . Overlap t11e edges of abutting blankets and anchor the overlap. Slope Treatment Condition Blanket Type Slopes 3:1 to 2:1 or steeper Straw/coconut blanket depending on soil type Erosive soil (sand) or slopes Straw/coconut blanket rece iving sheet flow from Synthetic/Plastic blanket roadway surface runoff COOT Landscape Architects can provide more Information on the appropriate types of soil retention blankets. Excellent Installation of so il retention blankets . Remember to entrench the blanket at tile top of the slope, every 35 feet, and at the bottom. Poor Installation of soil retention blankets. Blankets should have been staked down and overlapped, and should fully cover the disturbed area. Install blankets vertically on long slopes . Unroll from top of /iii/, staple as you unroll it. Do not stretch blankets . Straw/coconut blanke.ts usually degrade quicker than plastic blankets. Contact a COOT Landscape Arc/1itect to determine the type of blanket to be us.ed on the project. Remember to prepare soil, apply topsoil or soil conditioning, if requ ired, and seed prior to placing the blanket. .sIEL.1 PU.CE UPSLOPE DID OF Bl.AllKET Ill A TRD!Cli 6 I~. DEEP BY 6 IN . Vi10L f--12·--j T~l,~~I s· : t "· "'·" I _J__ '· .. ,.. ... ,: ~6-~ ' BWI KCT FAB RIC Al lC HOREO IN TREt:Cli .sI.EE2 USE A 4 Ill. OVERLAP \'/H£tlE.VER WIO WIDTHS Of BlMKET ARE INS TALLED SIDE BY SIOE. ·STAPLE PAITTR N: Mlll!M Ul.1 3 PER SQUARE YARD. ~ USE A 6 UI . OVERLAP WHEREVER ONE RO LL OF BlANKET ENDS AND ANOTHER BEGIN S. ff-~.:4 STAPLE PAITERN .sI.EE....i. CHECK SLOTS SHOULD BE llADE EVE.RY 35 fT . ANO AT TERW:IAL mos . lllSERT A FOLD OF THE BUJIK[T 1mo A TRO!CH 6 IN. v.mE BY 6 m. DEEP ANO CO!!PACT 1:1 C011 FORll.At:CE \l'ITH llAl!VFACTVRER 'S RECO\"IEl:OATIO~ LAY THE BLAllKCT S\IOOTHLY 011 THE SURFACE OF THE SOIL 00 l:OT STRETCH THE Bl.Al;KEl , At:O cxi t:or ALLQ'I/ ~R·N K LES. IUSTAL L STAPLES 12 IN. 011 CEllTER IN TRmCH. 6' x 6' lREt;CH ~1.'t~ BW!K CT AllCHOREO 1:1 lREr:CH -%'--t>... f'l).C£ BtJl>Ka PA.'Vll.El \'o lfH nlE o:RECllO:l Of fLCYN 1m l.':CHOll SECURELY. BR ,:;G BlJ.l•~ET TO THE TOE or SLOPE o.~ AS o:REClEO ff( IHE Er•G~'IEER BUORE !(RV ::m;G THE ~ISJAllAllW. Sii.P l[ 6' O:I CEllTER IJ.O::G £1)(:£ .,.,.,.,., ...... ~ Em banlmi en t Prot ector An embanl<ment protector, also called a temporary slope drain, is a flexible conduit for stonnwater that extends the length of a disturbed slope to divert stormwater and serve as a temporary outlet. Embanl<ment protectors convey runoff without causing erosion on or at the bottom of the slope and are used during grading operations permanent drainage structures are installed and until slopes are permanently stabilized. Embankment protectors are often used in conjunction with diversions to d irect runoff to the slope drain. Tips • Pipe embankment protectors shall utilize at least 6" flexible pipe. • The 6" pipes shall be securely fastened together, have water-tight fittings, and be securely anchored to the slope. • Embanl<ment protectors shall be inspected for erosion and accumulation of debris at the inlet and outlet after each significant rainfall. • Open chute protectors should be inspected for undercutting. If outlet protection is not shown in the plans,·contact a COOT Hydraulic Engineer for additional information. Excellent installation of an embankment protector (slope drain), but the end of tl1e pipe needs better outlet protection . Notice how the slope has eroded. Example of an appropriate place fo r an embankment protector. f'RO'(,()[ ou rta PRO IECllO:I AS SHQh :I 0:1 111£ f>W,'<,; P.PE ..s..EQilQ.tj TEMPORARY SLOPE DRAIN !) i~r~l ll(':S l:o11t r:11l!. Checl< Dam ......................... 30 Erosion Bale C/Jeck Dam ........... 31 Erosion Log C/Jeck Dam ............ 33 Temporary Roel< C/Jeck Dam ........ 35 Silt Dike C/Jeck Dam ............... 36 Silt Berm Check Dam .............. 38 Soil Retention Blankets for Ditch Use .... 39 01>--hu .. Drainage ditches need checl' dams to reduce the speed of water and capture sediment. Soil retention blanl,ets can also be used in ditches to reduce the speed of water and prevent erosion of the ditch. Seed ditches and install checl' dams befo re excavating, filling, or grading uphill areas. Remove temporary check clams after the site has been stabilized and vegetated. Check Dam Check dams are relatively small, temporary structures constructed across a ditch. As stormwater runoff flows through the structure, the checl< dam catches sediment ( from the channel itself or from the contributing drainage area. Chee!< dams are typically constructed out of erosion bales, erosion logs, rocl<, silt dil<es, or silt berms . They are most effective when used with other stormwater, erosion, and sediment-control measures. Tempo rary checl< darns should be removed when their useful life has been completed. In the case of grass- lined ditches, checl< dams should be removed when the grass has matured sufficiently to protect the ditch or swal e from erosion. The area beneath the check dams should be seeded and mulched immediately after the checl< dams are removed. Sediment should be removed and properly disposed of from behind the check dams when it has accumulated to o ne-half of the original height of the dam. Inspect for eros ion along the ends of the checl< clams and repair im mediately when necessary. ~ros/011 Bale Ch ee/{ Dam Yips • Erosion bales tend to clog with sediment quici{iy and need to be replaced often. • Erosion bales should be entrenched 4 inches into the ditch . • When placing erosion bales in medians or close to the road, ensure that the low flow point is below th e roadway surface to avoid flooding. • Erosion bales should be certified weecl -free. Ditch is too steep and bales are not installed per the M & S Standards . runoff speed exceeded the capacity of tl1e bales . Replace with stronger check dams . A STAKES (TYP.) 1~ r ~ 18" x 18" x 36 " EROSION BALES (lYP.) A 0 li ~ Pl.A~ STl .. ~lS (IYP.) ro:n c SECTION A-A EROS!O:I BAl.E SPACING BETWEEN EROSION BALES 1:01£: EROS.'0:1 BAI.ES SHALL BE EllTR[f;CH£D 4 IN. i.m;!WM mo IH[ SO:L. llGlfTL Y ABUTTED WITH 1:0 GAPS. SIJJ<ED, A/;D BAC~nt LED A'lOU::O THE [llllRE OUTS!OE PER"J[T[R. Putt IJ'O STl.•E TH( EROS'O.'I B.llES . SIJ..'E (2" X 2" l'O!J :w.) ~ EROS:~I SIUS .c· -~~~~ ~::~,,r.u~·,r~w~• 1 • .,ii-Pfefi~ Sl!.'<10, ff:E~ r.llH tm G.IPS_ • ~~~~,y§:Y,?j THE om'!£ BAOOlliO ARoo:i :<.· :" '>")%'-' y)J "f.·· OUISilE PER >~mR O _,~:{~0<_,~.,''/(/')>~%ft»~)/ ~~ :;(<' Y,-,'7j -, ,,:-(,<·. )~',~ .• ~· -TWNE OR ":.~E '1/.(/'jY''·' ~';/:-.( >~%~,_~.-.-;.>'/~ STAK E EllTREllCHEO AllD STAKED EROSIO!-l BALE JYPICAL EROSION BALE TRENCHING AND STAl<ING Erosion Log Cl1ecl< Da m Tips • Conform e rosion log to smooth bottom surface and ensure contact with the ground for the length of the erosion log. • Erosion logs can be placed on top of soil retention blankets to help reduce water velocity. • Proper sta l~ing is essential for erosion log function . • Diameter of the erosion log is specified in the Stormwater Management Plan. P0.:11 A l'IETLANOS OR ffATURES REQUIRING PROT£CTIO!l I SECTION A-A ER OSION LOG APPLICATION PLAN VIEW PO .:llS A StW.l 6( H:CHER THiii po:rr 8. ELEVATION EROSION LOG DETAIL DITCH INSTALLATION 1101(; EROS•O:I LOGS Sl!All Bf llGH lLY ABUTIEO YolTH 110 CAPS . ·~empora ry Roel( Chee!( Dam The maximum height of the checl( dam at the cente r should not exceed one half the depth of tl1e ditch o r swale . Yips • A 2-year or larger storm should safely flow over the check dam without an Increase in upstream flooding or destruction of the checl< dam. • The maximum height of the checl( darn at the center should not exceed 2 feet or one-half the depth of the ditch. The checl< dam shall be wide enough to reach from bank to bani< of the ditch or swale. Geotextile below the rock is essential for proper function. Riprap size is detailed in the design. If riprap size is not part of the design, contact a CDOT Hydraulic Engineer. • As a general rule, the maximum spacing between dams should be such that the toe of the upstream dam is at the same elevation as the top of the downstream darn. • Do not install checl< darns in state waters . Exce llent installation of rock clieck dams. { DITCH SU0£)(CAVAIE Bf LO'N no·,\l ~';[ l OR DITCH I 8'---------1 SE CTI ON DETAIL JYPICAL SECTION VIEi'/ l • VIJ!,(S C(Oltxlil( [ROS!O:I c o:llROL (CV.SS B) f (l 'll c 1·an1 14. "" * P0~1 S A St'J..ll U tt:Cl<EA flV..~ f(l:-tf 8 A'tJ !c."\O li f'Q:.\1 C SECTION VIE.VI ALONG DITCH FLOWLINE Slit Di/(e C/Jeck Dam Poor installation and maintenance of a silt dike c/ieck dam. Accumulated sediment s/Jould be removed and tile rigllt side of tile dike should be extended up tlieslope. ~ FlO'H __.,,,_, PLAN VIEW STAPHS 8" DEEP (TYP.) SILT DI KE SECTION SILT DIKE UNIT llOTE: APRON N:CHORED INTO TRH:CH WITH STAPLES N:O COi.•PACTED BACKnLL TYPICAL SECTION J2f REJ.!OV£ J.cCUMULATEO sm11rnr VIHEU rr REACHE S O:ff HAl.f OF STRUCTURE HEIGHT. ~lSPECTIO ~I SHAll BE PERFORIJEO cmmNUOUSlY FOR PROPER FUllCTION. EBONI YIEW SILT DIKE -INSTALLATION FOR DRAINAGE DITCH 1101(: SECTIOilS Clf THE S ~T O'KE Sl\ll.L BE TIGHTLY >DUTIE O YoHH 1:0 CIJ>S. Silt Berm CJ1ecl< Da m ~ PLAN VIEW PO.m A Fl0 1V _,,,_ BLJ!;~[l OR SOL SURrl.Ct STIJ>l(S 8" ()([P (fl!'.) TYPICAL SECTION VIEW FRONT VIEW SILT DIKE-VELOCITY CHECKS FOR DRAI NAGE DITCH r:OTE: SE CTIO~'S Of' Th'!' SU D"..<E SH.Ill BE l iCHll Y llllJll[O ~TTI! 1:0 WS. Soil Re t ention Blan~<ets for Ditch Use Dra inage ditc hes convey stormwate r runoff through a stable conduit. Vege t ation lining the ditch s lows down concentrated runoff. Because g rassed chan nels a re not usually desi gned to control peal< runoff loads by themselves, they are of ten used with other BMPs , such as checl ~ dams. If the drainage ditch is over 2 percent grad e, contact a COOT Landscape Arch itect for reco m mendations on blanket type. Refe r to Soil Retention Blanl<ets in the Slopes chapter for more deta ils o n installation a nd use. 'i'IJJ S Lay in blankets simila r to roof shingles; sta r t at the lowest part of the ditch , then worl< your way up. Uphill pieces lap ove r downh ill sections. Staple through both layers around edges at the overl a p. Tre nch, tuck, and t amp down ends at the top of the slope. Do not stretch blankets or mats. • Avo id crea t ing "v" sh aped d itches . Cons truct "u" or tra pezoidal shape. CHECK SLOTS SHOULD BE l.1ADE EVERY 35 FT. >.NO AT TIRl.!!~IAL mos. INS£RT A roLO OF TH E BWIK ET lllTO A TR£NCH 6 IN . l\iOE BY 6 Ill. DEEP ~IO CO~.'PACT L'I CONFO!ll.IJJICE v.TTH llAllUFACTURER's RECO~."IE!.'OATIO:I LAY THE BWIKET S1JOOTHLY 011 lliE SURFJ.CE Of TH E SQ;L, DO r:or STRETCH lliE BlJJ l~ET. AND 00 NOT ALLO'N \\Rit!KLES. r.ISTALl STAPLES 12 Ill. ON CEt/IER Iii l REt!CH. s· x 5· rnrncH~~,:J:u:u:.n.q1 *-'5!15'~++ J' ~~; l!W ~ ~ o:R£CIEO BY THE o:C~'[(.ft f--12·-j I ~ T~1 .~.::--1 &' _L '.: ~6·~ P!J~E llV:C<El Pk~'1.l£L ~'ITH THE 0 ~£Cf•ON Of' flO'N k'ID k~CHO R si:cvmr. e.~m w.::m 10 !HE 10£ or SLOI'( 00 ~ O:RECIU> Fil 1HE £1 1~!:£!1! BEfD~ TFRV NAR;G ?HF 11 Lc;fA1 I AllO.'l SfAPU 6' C>!! C!llTL'! AlO!:G Ee<;E " =rr Pua: Bl_/,,'{<[! ~llH TKE D:•EC TIO:l Of non. DO t:OT ,I() 11 SIR.PS r.• !HE WlltR or !HE OllCH . PV.CC Cl<ECK SLOl S /.S R£QU,R£0 . ~~~~0\t ell ffu~~ @ w~:ri ®~~ l?i',·@~®«;~~@ h il Contents Inlet Protection ...................... 42 Erosion Logs ..................... 42 Concrete Blocks and Roe l< .......... 44 Erosion Ba/es ..................... 45 Roel< Soc/< ....................... 4 7 Outlet Protection ..................... 48 Unll~®'G: CSJ!t1ld Q)Q~f.;ll®~ !Pr@\c®C~Ulf})fll Culv e rts and ditches are designed to carry mod e rate to large amounts of stormwc:iter. They also ca n carry a lot of sediment to streams, rivers, wetlands, lal<es and sensitive a reas if they are not properly protected. Culvert and swal e outlets can become severely eroded if fast sto rmwater f lows are not controlled . Inlet Protection Sto rm drain inlet protection measures prevent soil and debris from ente ring storm dra in inlets. Inlet protection is im ple mented at existing inlets prio r to construction, but new inlets are protected as they are installed and broug ht on -line. Inlets can be protected with erosion logs , co ncrete bloel<s, erosion bales, or other sediment contro l devices . Place inlet protection prior to milling operations, or other activities when debris may enter storm d rain inlets. See Eros ion Log Check Dams and Eros io n Bale Check Dams in the Ditches chapter for details and tips . Erosion Logs Ylp a • Plac e logs around the top of inlets to prevent sedi ment from falling in the flow line from above. Bad installation of ero sion logs . Stormwater is bypass ing the erosion tog . -£Rlr51o:i1'6cs SHALL - BE TIGHTLY ABlITTEO WITH r;o GAPS (TYP .) c ~ '"·~J1r ~11---_ ___.1,..L~,,,...1 .... 1 -~I -: .;<C>~V·l': t:• ' c;Lfl SECTION C-C llOTE : LOCATE EROS!O!I LOCS AT THE O\ITS !OE EOGE Of THE co:;cRm /.PR O:t DROP INLET EROSION LOG FILTER 8 L ~ PO "T TO TIE l.'I i.oorno:w. ~;L(l P~OTECTIO.'I ---- PLAN YIEW B J s<E JOOH<l"ll OCT~LS n>-~ r:LCT PROTEC TIO:I l.'I IH•S LOCATI O" \ fl.ON :---t:..... ~ fZf RE"o-.t ICltJ\'UlAT(O S£0:'JUll ~llUI rr ~ES o::t 1'.11.F Of PROTECTIO.'I fEAT\I.'<£ HOGllT. ClSPl:CTIO.'I 511.lJ.l 8( PERHY.MO CO.'lllNUOOSlY ro~ Plrof>(R nr.;cno:t SECTION B-B Concrete Blocks anc/ Rock 3/," TO 1/i" OPUI CIWlEO CAAVH FILTER DROP l.'HT ~lTH CRATE ViRE SCREEN PLACED JROU liO co:;cREIT BLOC KS PER •VETER fO (TIP.) PLAN YIEW C~.'ICRCT( lllOCKS Sll.f.KEO 24" H ~H ~~JCj==~======iE.;-1~~~:;;;::;;;;""..,...--~ SECTION A-A STORM DRAIN INLET PROTECTION (TYP E C OR 0) Erosio n Ba l es ._'.'~ Good installation of inlet protection l'lllil sill fence and erosion bales. Use erosion bales only if the area adjacent to tile inlet consists of soil . Poor installation of outlet protection l'lit/J erosion bales. Erosion logs should /1ave been use d at th e top oft/le inlet 0 0 B D f ._ fl.011 --i::,,,._ TllE L' :1 •JU'J STIJ<t.IC OEPTll IS THE SAVE IS EROS!lo'I IW.C TROICH :ic D . D 0 0 ORO? L'ILCT VollH C!lAl[ 0 . . l . '\.. \ 0 0 l D ~000 51.1.~ES PLAN YIEW EJITRO:CHEO EROS'ON P.AlES SECTION 8-8 • 0 B . - 0 0 OROP 1:UT INLET EROSION BALE _ FILTER (TYPE C OR D) r;OTE : EROS'Ol l IW.[S ,l.~E 10 ec OITROiCliEO 4 L~. t:HO THE So:L, llCHTLY ASUTll:IC 'A'tTH t:O C.IPS. ST.l.~£0 ,110 l\1,Cl<.nLLEO .l.~U:IO THC OITIRE OU1S•OE P£JWE1ER Of CRATE O~ SLOPE ~:O OllCH PAW:G. Hoel( So ck Poor use of a rock sock for inlet protection. The sock does not extend 1 foot either side of the inlet. .llillE f2f REl.IOVE ACCUMULATED SEOIMEllT VIHEll IT REACHES ONE HALF OF EXPOSEO ltllET PROTECTION HEIGHT . L'ISPECTION SHALL BE PERFORMED CO:HltlUOUSLY FOR PROPER FUNCTION . CURB 1:-ILET C Ill I '~?;'')?, . l.'ANflOLE CURB NID GUTTER STORIJ DRA'll INLET PROTECTION PLAN VIEW ~ -·""LVQ.,-0; -V .. \:\'.1 CURB ltlLET SECTION C-C STORM DRAIN INLET PROTECTION (JYPE R) !iQIES; 1. L'lLET PROTECTION SHALL EXTEND 12 Ill. PAST EACH mo or THE ttlLET NID BE 4 IN . TO 6 IN . Ill DIA'.'ETER. 2. ~'ILET PROTECTION VAY CONSIST OF CONTINUOUS nlTER TUBlllG nlLED \\11H GRAVEL OR PRO.'AllUFACTURED D~CE. Outlet Protection Outlet protection prevents scour and erosion at the outlet of a channel or conduit by reducing the speed of stormwater. Outlet protection is comprised of geotextile and riprap placed at the outlet. Good use of rock as outlet protection . The erosion log above l/1e culvert llelps prevent debris and dirt from falling into tl1eoutlet. Poor installation of outlet protection. Geotextlle was not placed under the riprap and not enough rock was used . As a result, stormwater is undercutting the existing rock. iment Traps amd Basin5 Conte nts Temporary Sediment Traps and Basins ... 52 l 'emporary Sediment uran»s and Basins Tempornry Sed i ment Traps and Bas i ns Sediment traps and basins are small Impoundments that allow sediment to settle out of stormwater runoff. Sediment traps are usually used for areas clralning 5 acres or less and sediment basins are used for areas draining 5 acres or more. Traps and basins should not be loca t ed closer than 20 feet from a proposed building foundation or highway alignment. See Dewatering Structure in the Specia l Conditions chapter for installation details . Yips • Temporary sediment traps and basins shall be installed before any land disturbance tal~es place in the drainage area. • Sediment shall be removed from the trap and basin when the wet storage volume has been reduced by one half. • The outlet of a trap shall be underlaid with geotextile and be at least 1 foot high. 0 The slope on the outlet shall be no steeper than 2:1. • Sediment trap outlets shall be made up of both coarse aggregate and riprap. • Sed iment traps shall only be dug down to a maximum of 4 feet, should not be installed in state waters, and should not mix with ground water. Good installation of a sediment trap outlet. Note that the outlet is protected 1•1it/1 a BMP. i;~) ~:i ~ '\ediment basins often have pipe risers, but well -constructed rock verf/ow outlet notches in the dam or retaining berm are acceptable if t11e overflow area is protected from erosion. f OF.1 W m CROU:.'O ELEV. E'!.B~IJKl.IEllT HEIGH! 4'!.IAX L 1600 FntAC \'lfT STORAGE i ~ r V~.Rl>BLE Sediment traps ancl basins should be installed before any land disturbance ta kes place in tl1e drainage area and be accessible by equipment to remove sediment . illu'i;r o~1 l?~owrn·f(uo1.1 t :o 1 1 t e 11 t ~ Concrete Washout Structure ........... 5 6 Construction Site Liquid and Solid Waste Management ............. 59 Spill Prevention and Control ........ 62 Clean Up Response Procedures ..... 62 Stocl<pile Management. ............... 64 Street Sweeping and Vacuuming ........ 66 Pollution Prevention Concrete Washout Structure Conc rete washout structures are usecf to contain conc rete ancl liqu ids when the chutes of concrete mixe rs and hoppers of concrete pumps are rinsed out after de livery. The washout facilities can be constructed or re ady-made . All washout facilities consolidate solid s fo r easier disposal and prevent runoff of liquids. The wash wate r is all<alin e and contains high levels of chromium, wh ich can leach into the ground ancl cont am inate groundwater. It can also m igrate to a storm drai n, which can increase the pH of nearby waterways and ha rm aquatic life. Yips • It is recommended that facilities be cleaned out on ce they are 2/3 full, or new facilities shall be constructed to provide add itional concrete waste sto rage. • Ad di ng solvents, flocculents, or acid to washwater is ( pro hi bited. • Do not place concrete washouts in low areas, ditch es or adjacent to state waters. • Pe rmanent d isposal of concrete washout waste on th e construction site is prohibited. Concrete was te slla/I be placed in a temporary concrete was/lout facility lo ca ted a minimum of 50 feet from state 1·1aters, drain age ways, and inlets . Note that erosion bale s on top of the berm are optional. Concrete wash water is alkaline and co11tains l1igl1 levels of chromium, w/Jich can leacl1 i11to the ground and contaminate groundl'later. It can also migrate to a storm drain, 1vl1ich can increase tire pH of area waters and harm aquatic life. Concrete washout should only be disposed of ill a properly labeled concrete washout facility. structure . ) SIG N EXIS TIN G Lit.Ill OF BERM ~ 9' MIN. ---1 T 15' MIN. _ EXCAVATED AND _ -- 1-24"--i CONCRETE T WASHOUT 18" ~-'_L CONTAINMENT AAfA RAMP ~3:1 TRUCK ACCESS PLAN VIEW 4' MIN. D (lYP.) GROUND I I I I . F ~ SECTION 0-D CONCRETE WASHOUT STRUCTURE NOTES : 1. SI GN l.~TERIAL. EXCAVATION, AND RESTORATION ARE INCLUDED IN THE COST or THE CO~CRETE WASHOUT STRUCTURE. 2. EROSION BALES l.'AY BE USED AS AN AIJERNATIVE FOR THE BERi.i. 0:1!!6~RM l'IASHOVT ,. ... · ....-~: / Constructio n Site Liqu id and Solid Waste Management Building materials and other construction site wastes, including sanitary wastes, must be properly managed and disposed of to reduce the risl~ of pollution. Practices such as trash disposal, recycling, proper sanitary facility maintenance, and spill prevention and cleanup measures can reduce the potential for stormwater runoff to mobilize construction site wastes and contaminate surface or ground water. Poor placement of a temporary sanitary facility. Temporary sanitary facmties s/Jould be located 50' al'tay from state waters drainagel'lays, inlets, receiving waters, areas of /1/g/J traffic, and areas susceptible to flooding. Wastewater generated from sanitary facilities shall not be allol'led to flol'I into storm sewers and drai11agel'lays. Only licensed /1aulers s/Jall be authorized to dispose ofl'laste. Facilities s/Ja// be secured to prevent overturning in areas susceptible to strong l'linifs. Waste s/Ja// be segregated properly Into various categories sucl1 as /Jazardous materials, toxic liquids, non·flazardous materials, and recyclable materials. Proper disposal is required for each by·product category. Containers of liquids should /1ave secondary containment and be stored away from dra inage1Vays, inlets, receiving l'laters, areas of /1 igl1 traffic, and areas susceptible to flooding . Containers also should be properly labeled . · .. ~" . ::· .. Poor placement of conta iners of liquid. The secondary containment should /10/d 1. 5 times the storage capacity of t11e container. Spill Prevention am/ Control Spill Prevention and Control Plans (SPCPs) shall clearly state measures to stop the source of a sp ill, contain the s pill, clean up the spill, dispose of con t aminated materi als, and train personnel to prevent and control future spills. SPCPs are applicable to construction sites wh er e hazarclous wastes are stored or used. Hazardous was tes include pesticides, paints, cleaners, petroleum pro du cts, fertil ize rs, and solvents. 'i'ltl 9 • Spills shall be contained and cleaned up as soon as possible. If co mplete cleanup is not posslble immediately, the n spills shall be fully covered and not exposed to rai nfall. • Residuals left over from the clean up activity, such as absorbent pads or containers of spill material, shall b e disposed of properly. • Proper spill and illicit discharge reporting procedures shall be followed for both hazardous and non- ha zardous materials. • Spi ll s shall not be washed down into the storm drain o r buried anywhere . Clean Up Response Proceclures • For non-hazardous materials such as gasoline, pa int, or oil that may be spilled in small quantities, the following measures shall be implemented : • Use absorbent materials to contain spills and clean the area of residuals. • Dispose of the absorbent material properly. • Do not hose down spill area with water. • Fo r non-hazardous materials that qualify as a significant spill, the following measures shall be im p lemented: • Contact the CDPHE 24 Environmental Emergency Spill Reporting Line (1-877-518-5608) within 24 hours of the spill event. A written notification to CDPHE is necessary within 5 days. • Contact the Colorado State Patrol 24-hour hotline (303-239 -4501) If the spill is on a State highway. • Report spill to project engineer and COOT maintenance personnel on patrol. • Call the COOT illicit discharge hotline (303-512- 4426) if spilled material spreads to COOT storm drain or waterway adjacent to CDOT rigl1t -of-way . • Clean up spills immecliately. Use absorbent materials if the spill ls on an impermeable su rface. Construct a slightly compacted earth dil<e to contain a spill on dirt areas. If rainfall is present at the time of the spill, cover the spill with a tarp to prevent contaminating runoff. • For spills involving ha:rnrdomi materia ls , the following measures sha ll be implemented: • Contact the local emergency response team by dialing 911. • Contact COPHE 24 Environmental Emergency Sp ill Reporting Line (1-877-518-5608) within 24 hours of the spill event. A written notification to th e COPHE is necessary within 5 days. • Contact the Colorado State Patrol 24-hour hotlin e (303-239-4501) if the spill is on a State highway. • Report spills to the project engineer and/or COO T maintenance personnel on patrol. • Call the COOT illicit discharge hotline (303-512- 4426) if spilled material spreads to COOT storm drain or waterway adjacent to CDOT right-of-way. • Clean up spill immediately; a licensed contractor or a HazMat team shall be used to properly clean up spills. • Construction personnel shall not try to cleanup the spill. All spills should be cleaned up Immediate ly. Insp ect equipment and vehicles rout inely for leaks. Maintain an ample supply of cleanup materials at all designated maintenance areas \'/here leaks and spill are likely to occur. Stockpile Management Stocl<pil es of soil and other erodible materials must be manage d so that stormwater does not come in contact with the pile and potentially wasl1 pollutants into state wate rs including waterways and wetlands. Tip s • To ps oil/embankment stockpiles shou ld be sprayed w ith soil bincler or have mulch/mulch tacl<lfier applied to prevent wind erosion. Stockpiles where wor l< is temporarily halted, shall be temporarily stabilized within 7 days after the activity ceased, unless work is to be resumed within 30 calendar d ays after the activity ceased. • The toe of erodible stockpiles must be protected with a BM P at all times. • Do not place stocl<piles in drainage ways or near state waters. Note thai tarps are being used to cover unused materials and materials are on pallets . There are no temporary perimeter sediment barriers st1c/1 as sandbags or silt fence to protect t/Jis stockpile from stormwater runoff. Surface treatment on the stockpile may be necessary if left exposed. Poor placement of stockpiled erosion bales. They are adjacent to a drainageway. Street Sweeping and Vacuuming The construction of streets, roads, highways, and pa rl{ing lots can cause the accumulation of significant amou nts of pollutants that can potentially contribute to sto rmwater pollutant runoff to surface wate rs . Pollu t ants, including sediment, debris, and trash can be min im ized by street sweeping. l'itl6 Inspect potential sediment tracking locations daily ancl sweep or vacuum daily. • All sweepings shou ld be disposed of properly. • Be careful not to sweep up any unknown substance or objects that may be potential ly hazardous. • Do not use l{icl{ brooms or sweeper attachments. .. iy>e c uaD Com.m:u~Mn s Dewatering Structure Dewater ing structures settle and filter sediment-laden water (see the Sediment Trap BMP In the Sediment Trap and Basin chapter). A dewatering permit is required from the Colorado Department of Public Health and Environment for dewatering activities. Yips • Water from dewatering operations shall not be directly discharged into any state waters including wetlands, irrigation ditches, canals, or storm sewers, unless allowed by the permit. • Discharge into sanitary sewers will not be allowed unless written permission is obtained from the municipality or owner of the sanitary sewer system. • Dewatering bags must be placed on level ground that has been stabilized with blanl(et, rocl(, or another approved BMP. c L--· .···· : ,,..- B ~_J l i £1J?VR:.~'f R ~RAP OVTtfl STRUCH.>ii'( 24" l.l'N . ...... c PLAN VIE\'/ 24" 111:~. TOP OF DITCH SLOP£ i=>, \Ll I. L=1 ~ 1 l!ORL1Al 02 rw11 ur:E ZERO GRAOIEIH 1:1 SLOPE (TYP .) CROSS SECTION 8-8 TOP ELEVATIO!I Of STRUCTURE StW.l BE SET Ill fl ELO AS O:RECT EO B'i' THE Et:G!l:EER 24" 12" CEOTEXT IL E EROSIOl4 co:n ROL (ClASS B) 24" 12 · 12· SECTION C-C DEWATERING STRUCTURE l,'0[£: l HE RJPRAP JUD GEOTEXTIL( A.~E 1::ct uorn Ill THE COST or THE B'D ITW See sediment traps and basins chapter for other outlet options and tips. ~Uifillil'C:W~il'1lrira: ~mm1 fOJ@1t~ COOT Stormwater Helpline .. . 303-918-7535 COOT Ill icit Di scharge Hotline . 303-512-4426 CO PHE Env ironmental Emergency Sp ill Reporting Lin e ..........• 1-887-518-5608 Co lorado State Patrol 24 -hour hotline .... 911 (for emergencies only) COOT Water Quality Program . . . . . . . 303-239-4501 Web Page . . . . . . . . . . . . ... www.cdot112o.com c >< ·-""C c: Q) c.. c.. <C c.. CJ) c 0 +:i c (1) > ~ a_ c 0 +:i ::::l 0 a_ "-(1) -.. ro :s: E "- 0 -.. CJ) c 0 ·--.. (.) ::::l "--.. Cf) c 0 u t:: 0 c.. (1) ~ GOULD CONSTRUCTION Construction Storm water Pollution Prevention Spill Report Spill Reported By : ________ _ Phone Number: __________ _ Details Date Reported : Time : _____________ _ Date of Spill: Time: _____________ _ Name of the Facility: _________________________ _ Describe Spill Location and Events Leading to Spill : Material Spilled: _________________________ _ Source of Spill: _________________________ _ AMOUNT OF THE SPILL (GALLONS OR POUNDS): __ Containment and Cleanup Action : Date and Time of Cleanup Completed or Terminated : ______________ _ Description of Materials Contaminated: ___________________ _ Label on the Drum of Cleanup Materials : ___________________ _ Signed: _______________ _ Printed Name and Title : _________ _ w >< ·-"'C c: Cl) c. c. <( CJ) E !..... 0 LL t 0 c.. Q) 0::: c .o ..... (.) <( Q) .> ..... (.) ~ !..... 0 (.) -c c ro c 0 t5 Q) c.. CJ) c -c _Q) LL COLORADO DEPARTMENT OF TRANSPORTATION STORMWATER FIELD INSPECTION REPORT -ACTIVE CONSTRUCTION (1) Project Name: (2) Project Contractor: (3) Erosion Control Supervisor/SWMP Administrator: (4) COOT Project Engineer/Representative: (5) lnspector(s) (Name and Tille): (6) COOT Project Number: (7) Project Code (Sub Account#): (8) COPS-SCP Certification#; (9) COOT I (10) Date of Project Inspection : Region: (11) Weather at Time of Inspection: (12) REASON FOR INSPECTION I EXCLUSION o Routine Inspection: (minimum every 14 Calendar Days) 0 Runoff Event: (Post-storm event inspections must be conducted within 24 hours after the end of any precipitation or snowmen event that causes surface erosion. If no construction activities will occur following a storm event, post-storm event inspeclions shall be conducted prior to re -commencing construction activities, but no later than 72 hours follow in g the storm event. The occurrence of any such delayed inspection must be documented in the inspection record.) Routine inspections still must be conducted every 14 calendar days. Storm Start Date : Approximate End Time of Storm (hrs): o Third Party Request: 0 Winter Conditions Inspections Exclusion: Inspections are not required at sites where construction activities are temporarily halted, snow cover exists over the entire site for an extended period, lillQ melting conditions posing a risk of surlace erosion do not exist . This exception is applicable ~during the period where melting conditions do not exist, and applies to the routine 14-day inspections, as well as the post-storm-event Inspections . If visual lnspecllon of the sile verifies that all of these conditions are satisfied, document the conditions in section 18 (General Notes) and proceed to section 19 (Inspection Certification). Documentation must Include: dates when snow cover occurred, d ate when construction activities ceased, and date when melting conditions began. o Other: (13) SWMP MANAGEMENT (14) CURRENT CONSTRUCTION ACTIVITIES : Yes No NA (a) Is the SWMP notebook located on site? · .. (b) Are changes to the SWMP documents noted and approved? (c) Are the inspection reports retained in the SWMP notebook? (d) Are corrective actions from the last Inspection completed? (e) Is a Spill Prevention Control and Countermeasure Plan retained at the project site? Estimate of disturbed area at the time of (f) Is a list of potential pollutants retained at the site? •. the Inspection: Acres (15) BMPs ON SITE AT TIME OF INSPECTION •see Inspection Report Instructions for more detail. lnSWMP Used I Not Needed , atthlstlme (a) EROSION CONTROL BMPs ON SITE Seeding o 0 0 Mulching/Mulch Tackifier o 0 0 Soil Binder o 0 0 Soil Retention Blankets o 0 0 Embankment Protector* · o . 'O ·a Grading Techniques• o 0 0 aerm101verslori . . ·. o .. Q \ ·>a .. Check Dams* o 0 0 6uuet Proiecuon· ·. ci 0 ti Other: o 0 0 lnSWlilP (b) SEDIMENT CONTROL BMPs ON SITE Stabilized Const. .E:ntrance Sed iment Trap Inlet Protection• Sed iment Basin 0 0 0 0 Used I Not Needed el this time 0 ····o 0 0 0 D 0 0 a 0 Ped meter Control* ·. ·. ' I o Othe~ o I o I o {d) MATERIALS HANDLING, SPILL PREVENTION, WASTE MANAGEMENT AND GENERAL POLLUTION PREVENTION stoc.ki)11e Man~a.9~i'nent* . ci ... 0 .;a .·· >o 0 a · Materials Management* Co ncreteWaste Manag· ement• .. · · (c) BMPs FOR SPECIAL CONDITIONS . ··. ·. . .. · ... · ·.· .. · ... ·. . . ····.. . ... Saw Water Management" 0 Cl 0 :.·:a 0 ·.·,.··.a < 0 a 1--D-ew-·· -c,tt_e_ri-~g-.. -S-tr-l!c_t_,u:-re-.. -.. ---.,--,.--.,0-..• -,:..,.,:•: ~.,.,..,: •. :.->·•.,.,..a-.. :,->.-.. .,.-,.,-,..: ·"""'o,-,-\,.-1.. Solid wc;l~terrrash 'Manage merit .' .· Temp. Stream Crossing yl~,a,r:Wa,t,$(piy~r$iOCT , Sensitive Area Fencing other::;:< : ;,:: .. ·· · page 1of5 0 b 0 <(] 0 . :q D <>o 0 Street Sweeping a D 0 . . . .. , . . 0 ~.··.•. ·.'· q .: ~ (16) CONSTRUCTION SrrE ASSESSMENT & CORRECTIVE ACTIONS -ott site Pollutant Discharges are a Violation of the Pennit and Reason tor Immediate Project Suspension .. '" "' 2. "' 0 c 0 ... ..,, 0 3 ~ -~ ~ The construction site perimeter, all disturbed areas, material and/or waste storage areas that are exposed to precipitation, discharge locations, and locations where vehicles access the site shall be inspected for evidence of, or the potential for, pollutants leaving the construction site boundaries, entering the storrnwater drainage system , or discharging to state waters. If there is evidence of sediment or other pollutants discharging from the site , see section 17 (Construction Site Assessment). All erosion and sediment control practices identified in the SWMP shall be evaluated to ensure that they are maintained and operating correctly. Identify the condition of the BMP, using more than one letter if necessary: (I) Incorrect Installation; (M) Maintenance is needed ; (F) BMP failed to operate ; (A) Additional BMP is needed ; (R) Remove BMP. Keep copies of th is blank page for additional room if needed. Continuous maintenance is required on all BMPs. BMPs that are not operating effectively, have proven to be inadequate, or have failed must be addressed as soon as possible, immediately in most cases. l frii!~if'.,[ <; y; - 00 .... . --s-~P -~ bbnditi6n · -. : _· .'. · · -· -.-·---~ .. · _ •. -~ .comments: •. _. : _ . / < .... < .-<Date _, c6mp1ete~ ::.-:.' ·-··· _uffr>u '· . , ___ .. ___ .-> _ :.<_<: : . . . . << ,;, . -• <_Description 'ofCorrective Action ·andPreventativeMeasureTaken ••· _ _ > <&--Initials : _ I ~ (17) CONSTRUCTION SITE ASSESSMENT: ... OFF SITE POLLUTANT DISCHARGES ARE A VIOLATION OF THE PERMIT AND REASON FOR IMMEDIATE PROJECT SUSPEN::;ION*• ~ 2. (a) Is there evidence of discharge of sediment or other pollutants from the site? 0 Yes 0 No "' "If yes, explain the discharge and the corrective actions in section 16 (Construction Site Assessment & Corrective Actions) or section 18 (General Notes). (b) Has sediment or other pollutants discharging from the site reached state waters? 0 Yes 0 No· 0 0 0 ~ 6' 3 !t ... Cl ~ *If yes, see subsection 208.03(c) and Part II A.2 and 3 of the permit for reporting requirements. (18) GENERAL NOTES (19) INSPECTION CERTIFICATION I certify under penalty of law that this document and all attachments were prepared under my direction or supervis ion i n accordance with a syst em 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 respons ible for gathering the information , the information submitted is , to t he best of my knowledge and belief, true , accurate, and complete. I am aware that there are significant penalties for subm itting false information , including the possibi lity of fine and imprisonment fo r knowing v iolations. Contractor's Eros ion Control Sup e rv isor/SWMP Administrator (Sig nature Req uired) Date: CDOT Project Engineer/COOT Des ignee (Signature Requ ired) Date: (20) COMPLIANCE CERTIFICATION Corrective action(s) has been taken, or where a report does not identify any incidents requiring corrective action, the report shall contain a signed statement indicating the site is in compliance with the permit to the best of the signer's knowledge and belief. Contractor's Erosi on Contro l Supervisor/SWMP Administrator (Sig nature Required ) Date: CDOT Proj ect Engineer/COOT Designee (Signature Req uired) Date: Stormwater Management Field Inspection Report Instructions State waters are defined to be any and all surface and subsurface waters which are contained in or flow through th e state , ;ncluding, streams, rivers, lakes, drainage ditches, storm drains, groun d water, and wetlands, but not includ ing waters i n sewage .;ystems, waters in treatment works or disposal systems, waters In pota ble water distri bution systems, and all water withdrawn fo r use until use and treatment have been completed . (Per subsection 107.25 and 25-8 -103 (19) CRS) (3) Erosion Control Supervlsor/SWMP Administrator: Indicate the name of the Individual responsible for Implementing , maintaining and revising the SWMP . (4) COOT Project Engineer/Representative: Indicate the name of th e COOT representative performing the inspection w ith the ECS/SWMP Adm i nistrator. This person should be the Project Enginee r or an authorized representative . (9) COPS-SCP Certification#: Indicate the Colorado Discharge Per mit System (COPS} Stormwater Construction Permit (SCP) (for Stormwater Discharges Associated with Construction Activities) certif ication number, Issued by COPHE, fo r the project wh ich the report Is being completed. Certification number can be found on th e fi rst page of the SCP. {12) Reason(s) for Inspection I Exclusion: Indicate the purpose fo r the inspection or exclusion . These inspections are required to comply with the COOT Specifications and the COPS-SCP. o Routine Inspections. These inspections are required at least eve ry 14 calendar days during active construction . Suspended projects require the 14 calendar day Inspection unless snow cove r exi sts over the entire site for an extended period of ti me, and melting conditions do not exist (see, Winter Conditions Inspections Exc lus ions). o Runoff Event Inspection for Active Sites . See page 1 for defini tion . o Third Party Request. Indicate the name of the third party requestin g t he Inspection and, If known, the reason the request was made. o Winter Conditions Inspections Exclusions . See page 1 for definitio n . An inspection does not need to be completed , but use this form to document the conditions that meet the Exclusion . o Other. Specify any other reason(s) that resulted in the inspection . {13} SWMP Management: Review the SWMP records and documents and use av to answer the question . To comply with COOT Standard Specifications and the COPS-SCP, all of the items id en tified must be adhered to . If No is checked , document the reason and Indicate the necessary corrective action In section 16 (Co ns truction Site Assessment & Corrective Act ions). If NA Is checked, indicate why In the space provided or Indicate in section 18 (General Notes). (a} Is the SWMP notebook located on site? A copy of the SWMP note bo ok must be retained on site, unless another location , specified by the permit, is approved by the Division. (b) Are changes to the SWMP documents noted and approved? Indi ca te all changes that have been made to any portion of the SWMP notebook documents during construct ion . Changes shall be d ate d and signed at th e time of occurrence. Amendmen ts may Include items listed in subsection 208 .03{c). (c) Are the Inspection reports retained in the SWMP notebook? The EC S/Engine er shall keep a record of inspections . Inspection reports must Identify any Incidents of non-compliance with t he terms and conditions of the COOT specifications or the COPS-SCP. Inspection records must be retained for three years from ex piration or inactivation of permit coverage. (d) Are corrective actions from the last Inspection completed? Have cor rective actions from t he last Inspection been addressed? Is a description of the corrective action(s), the date(s) of the correct ive action (s}, and the measure(s) taken to prevent future violations (including changes to the SWMP, as necessary) docum ente d? (e) Is a Spill Prevention Control and Countermeasure (SPCC) Plan reta ined In the SWMP notebook? Subsection 208 .06(c) requires that a SPCC plan be developed and Implemented to establis h op erating procedures and that the necessary employee training be provided to minimize accidenta l releases of pollutants that can contaminate stormwater runoff . Records of spills, leaks or overflows that result in the discharge of pollutants must be do cu mented and maintained. Information that should be recorded for all occurrences include the time and date, weather condit io ns , reasons for spill, etc. Some spills may need to be reported to the Water Quality Control Division immediately. (f) Is a list of potential pollutants retained at the site? Subsection 107.25(b)6 requ i res the Erosion Control Supervisor to identify and describe all potential pollutant sources, including materials and acti vities, and evaluate them for the potential to contribute pollutants to stormwater discharge. {14) Current Construction Activities: Provide a short descri ption of th e current construction activities/phase at the project site; Include summary of grading activities, installation of utilities, paving, exc avation , landscaping, etc. -Estimate the acres of disturbed area at the time of the inspection . Inclu de clearing, grading, excavation activities, areas receiving overburden (e.g. stockpiles), demolition areas and areas wit h heavy equipment/vehicle traffic, installation of new or improved haul roads and access roads, staging areas, borrow areas a nd storage that will disturb existing vegetative cover. (15) BMPs On Site at Time of Inspection: Ind icate the BMPs that a re Installed on-site at the time of Inspection. All BMP details (e.g., Standard Plan M-208-1) shall be Included with the SWMP documents . page4 or 5 COOT Form #1176 7/11 Stormwater Management Field Inspection Report Instructions (continued) BMPs In SWMP/Used/Not Needed at this Time. This section can be used as follows : ':J If the BMP is required by the SWMP and Implemented, ind icate by placing a ti in both the "In SWMP" and "Used" columns . .J If the BMP is required by the SWMP, but not implem ented , indicate by placing a ti in the "In SWMP" and "Not Needed at this Time" columns. (a) Erosion Control BMPs On Site -Embankment Protector (e.g ., temporary slope drains, open-chute dra i ns, etc.} -Grading Techniques (e.g ., vertical tracking , scarifying, or disking the su rface on the contour, etc.) -Check Dams (e.g., rock check , erosion logs, erosion bales, silt berm s, etc.} -Outlet Protection (e.g., riprap, erosion log around top of headwall, etc .} (b} Sediment Control BMPs On Site -Inlet Protection (e .g., erosion logs , erosion bales, sand bags , gravel b ags, etc .} -Perimeter Control (e.g., silt fence , erosion logs, berms, etc .) (d) Materials Handling, Spill Prevention, Waste Management and Ge neral Pollution Prevention -Stockpile Management. Stockpiles shall be located away from sens itive areas. All erodible stockpiles (includ ing topsoil) shall be contained by silt fence, berms or other sediment contro l devices thro u ghou t construction (also see subsection 208.07). -Materials Management. Material that could contribute polluta nts to stormwater shall have secondary containment or other equivalent protection (also see subsection 208 .06(a). -Concrete Waste Management. All concrete residue shall be containe d In a signed structure as designed per subsection 208.020) and subsection 208.05(n). It shall be located a minimum of 50 f ee t fro m s tate wate rs. -Saw Water Containment (e .g ., pick-up b!oom or vacuum). Street wash i ng is not allowed . -Sanitary Facility. Temporary sanitary facililies sha ll be located 50 fe et a way from drainage ways, inlets, receiving waters, and located away from areas of high traffic, and a reas susc eptibl e to flood in g or damage by construction equipment. (16} Construction Site Assessment & Corrective Actions: Inspect th e construction site and ind icate where BMP feature(s) Identified in section 15 (BMPs On Site at Time of Inspection), require corrective action . Erosion and sed iment control practices identified in the SWMP shall be evaluated to ensu re that they are ope rating correctly . -Location . Site location (e.g., project station number, mile marker, inters ection quadrant , etc .). -BMP . Indicate the type of BMP at this location that requires corrective action (e .g., silt fence, erosion logs , soil retention blankets, etc .). -Condition. Identify the cond ition of the BMP, using more than one lette r (identified In section 16) if necessary. -Description of Corrective Action and Preventat ive Measure Taken . P rovide the proposed corrective action needed to bring th e area or BMP into compliance . Once corrective actions are completed , stale the measures take n lo prevent future violations a nd ensure that the BMPs are operating correctly, includ ing the required c hanges made to the SWMP. -Date Completed & Initials. Date and initial when th e corrective action was completed and the preventative measure statement finished. (17} Construction Site Assessment: Was there any off site discharge of sediment at this site since the last inspection? (a) Is there evidence of discharge of sed iment or other pollutants from t he site? Off site pollutant discharges are a violation of the permit. The construction site perimeter, all disturbed areas, m at erial and/or waste storage areas that are exposed to precipitation, discharge locations, and locations where vehicles acce ss the site shall be inspected for evidence of, or the potential for, pollutants leaving the construction site boundar ies, enter ing th e stormwater drainage system , o r discharging to state water. (b) Has sediment or other pollutants discharging from the site reache d state waters? Off site pollutant discharges are a vlolatlon of the permit. If off site discharge has occurred, explain th e discharge and the corrective act ions in section 16 (Construction Site Assessmen t & Corrective Actions) or section 18 {G eneral Notes). (18} General Notes: Indicate any additional notes that add detail to t he Inspection; th is may include positive practices noted on the project. (19) Inspection Certification: In accordance with Part I, F.1.c of th e C OPS-SCP , all reports for submittal shall be signed and certified for accuracy. (20) Compliance Certification: In accordance with Part I, 0 .6.b.2 .v iii of th e COPS-SCP, compliance shall be certified thro u gh signature. page5 of 5 COOT Form #1176 7/1 1