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Home My WebLink About20153337.tiff SITE SPECIFIC DEVELOPMENT PLAN AND USE BY SPECIAL REVIEW (USR) APPLICATION FOR PLANNING DEPARTMENT USE DATE RECEIVED: RECEIPT # /AMOUNT # 1$ CASE # ASSIGNED: APPLICATION RECEIVED BY PLANNER ASSIGNED: Parcel Number O ' .. a_ . - S.a. ''....,_ a_''....,_-__a_ a - O 0 t (12 thgf nurrter - found on Tax ID. information, obtainable at the Weld County Assessors Office, or kwrw.co.wek1.co.us) Legal Description On tlitd. *WA et lht Sw 14 _., Section ,�,j,, Township 6 North, Range4. West Zone District: AG Total Acreage:20 , Flood Plain: Zone C Geological Hazard: No , Airport Overlay District: No FEE OVWNER(S) OF THE PROPERTY: Name: Wells Ranch LLLP, Steven T. Wells, General partner Work Phone # 970 356 4671 Home Phone # Email Address: 32010 WCR 63 Address: City/State/Zip Code Gill, CO 80624 Name: Work Phone # Home Phone # Email Address: Address: City/State/Zip Code Name: Work Phone # Home Phone # Email Address: Address: City/State/Zip Code _ APPLICANT OR AUTHORIZED AGENT (See Below. Authortzetfon must accompany applcatIbns signed by Authorized Agent] Name: Gregory Kardos Work Phone # 970 378 6370 Home Phone # 970 373 7536 Email gckardos@dcpmidstream.com Address: 3026 4th Avenue Address: City/State/Zip Code Greeley, CO 80631 PROPOSED USE: DCP Midstream proposes to build the Wells Ranch Low Low Pressure Compressor Station Northeast of Greeley on the Wells Ranch property I (We) hereby depose and stateunder penalties of perjury that all statements, proposals, and/or plans submitted with or contained within the application are true and correct to the best of my (our)knowledge. Signatures of all fee owners of property must sign this application. If an Authorized Agent signs, a letter of authorization from all fee owners must be included with the application. If a corporation is the fee owner, notarized evidence must be incl ded - d tin that the signatory has to legal authority to sign for the corporation. V, _h„.,_. /t-r/- 6- ,t) - 1 .5 Signatetre:,44yr r or Authorized Agent Date Signature: Owner or Authorized Agent Date Introduction DCP Midstream, LP (DCP) has the need to build a small compressor station to process existing natural gas from older vertical wells located within the Wells Ranch property. This Use by Special Review (USR) permit application addresses the proposed Wells Ranch Low Low Pressure Compressor Station (Wells Ranch LLP) and an up to 100' DCP communications tower. The Wells Ranch LLP Compressor Station will be located within the E 1 /2 of the NW 1 /4 of the SW 1 /4 of Section 19, Township 6 N, Range 62 W, of the 6th P.M. , Weld County, Colorado. The subject parcel (Parcel #079719100005) is currently owned by Wells Ranch L. L. L. P. , A Colorado limited liability limited partnership. DCP has entered into a lease arrangement for the property with the owner. DCP intends to commence construction of the Wells Ranch LLP Compressor Station September 2015 and complete construction in December 2015. Although the leased area of the site is about 20 acres, the permanently developed area will only be approximately 3.73 acres after the construction of the compressor station is completed. After construction, the project site will be fully fenced and the area inside the fence will be graveled. The area outside the fence will be re-vegetated with native grasses. After construction, the site will be unmanned. Because the site will not be permanently occupied, sewage and drinking water will not be provided. Portable sewage units and bottled water will be provided on site during construction and one portable sewage unit shall remain on site upon completion of construction). This compressor station will not have any lighting since it is such a small and remote site. The site parcel is located within the Galeton Fire Protection District. In the event of a fire, water or chemical retardants will be transported to the site by the Galeton Fire Department. Weld County code requires noise levels for industrial or construction sites to be below 80 dB(A) from 7:00 a.m. to 9:00 p.m. and below 75 dB(A) from 9:00 p.m. to 7:00 a.m. DCP does not foresee exceeding these limitations during the construction or operation of the Wells Ranch LLP Compressor Station. Exhibit A Use by Special Review Application The Wells Ranch LIP Compressor Station leased site encompasses approximately 20 acres located in the E 1 /2 of the NW 1 /4 of the SW 1/4 of Section 19, Township 6 N, Range 62 W, of the 6th P.M. , Weld County, Colorado. Exhibit D USR Questionnaire 1 . Explain, in detail, the proposed use of the property. DCP proposes to build the Wells Ranch LLP Compressor Station northeast of Greeley, Colorado on the Wells Ranch property located in the E 1/2 of the NW 1/4 of the SW 1/4 of Section 19, Township 6 N, Range 62 W. of the 6th P. M., Weld County, Colorado. 2. Explain how this proposal is consistent with the intent of the Weld County Code, Chapter 22 of the Comprehensive Plan. The proposed use is consistent with the comprehensive plan 's intent to foster development of the natural resources of Weld County. Given the limited size of the property (only 3 73 acres of the 20-acre leased parcel will be disturbed after construction is completed), the proposed use will have minimal impact on the surrounding land, which is currently used for livestock grazing and oil and gas facilities. 3. Explain how this proposal is consistent with the intent of the Weld County Code, Chapter 23 (zoning) and the zone district in which it is located. The proposed use is consistent with the intent of the agricultural zone district, as it will foster the development of oil and gas resources while minimizing the impact on agricultural uses. Pursuant to Section 23. 3. 20 of the Weld County Code, oil and gas production facilities are a permitted use by right in this zone. 4. What type of uses surround the site (explain how the proposed use is consistent and compatible with surrounding land uses). The site is located in an area of the County used primarily as pasture land and for various oil and gas operations and facilities. The site is surrounded by livestock grazing areas Pursuant to Section 23. 3. 20 of the Weld County Code, oil and gas production facilities are a permitted use by right. By keeping the compressor footprint small, it is intended that surrounding agricultural and grazing areas will not be affected by the compressor station's presence. 5. Describe, in detail, the following: a. Number of people who will use this site. The site will be normally unmanned, but will usually be visited twice a week by one technician for (typically) 60-90 minutes to check equipment meter readings. b. Number of employees proposed to be employed at this site. The site will be unmanned. c. Hours of operation. 24 hours a day, seven days a week, 365 days a year. d. Type and number of structures to be erected (built) on this site. 2 gas compressors (housed within a pre-fabricated enclosure for the gas compressor package - powered by a whisper watt or similar generator - also housed within a pre- fabricated enclosure); Instrument Air Compressor Enclosure; and a communications tower up to 100' in height intended for DCP Midstream's internal communications use only will be built. e. Type and number of animals, if any, to be on this site. None. f. Kind of vehicles (type, size, weight) that will access this site and how often. There will be one pickup truck on site for 60-90 minutes twice per week using the existing gravel road and permitted access on CR 68 (existing Access Permit #AP12- 00236). g. Who will provide fire protection to the site? The Galeton Fire District is the responding fire department for this proposed compressor station. Water or fire retardants will be transported to the site in the event of a fire. h. Water source on the property. During construction, the contractor will supply potable water. Water will not be provided on-site after construction. The site is unmanned and will not require water utilities after construction. i. Sewage disposal system on the property. During construction, the contractor will supply portable sewage disposal units. The site is unmanned and will not require sewage disposal after construction, although a portable toilet will be provided on site for use by DCP employees visiting the site twice a week. The toilet will be serviced by a waste removal company licensed by Weld County. j. If storage or warehousing is proposed, what type of items will be stored? Oil and gas waste/by-products will be temporarily stored on site in the following containers: 1000 gal used engine oil tank — 1 1000 gal used coolant tank - 1 90 bbl slop oil tank — 1 Spent filters General refuse 6 yd. - 1 Chemicals to be stored: 1000 gal methanol tank — 1 1000 gal lube oil tank - 1 1000 gal coolant tank - 1 6. Explain the proposed landscaping for the site. No landscaping is planned. The site will be graveled inside the fence line and re- vegetated with native grass outside the fenced area. 7. Explain any proposed reclamation procedures when termination of the USR activity occurs. At completion of construction, the site outside of the fenced boundary will be re-vegetated with native grasses. The area inside the fenced boundary will be graveled. If operations at the site were to cease, DCP would follow regulations regarding site abandonment and reclamation as outlined by the COGCC. 8. Explain how the storm water drainage will be handled on the site. The site will be graded such that storm water will flow into an approved Water Quality Control Volume (WQCV). All stormwater runoff from the compressor station will be collected via ditches routed to the WQCV pond on the south end of the site. The WQCV pond is sized in accordance with Weld County WQCV requirements. 100% of the runoff from a 100-year/24-hr. storm will be collected in the pond and detained (no longer than 40 hrs.). 9. Explain how long it will take to construct this site and when construction and landscaping is scheduled to begin. Construction is expected to last four months - September 2015 through December 2015. 10. Explain where storage and/or stockpile of wastes will occur on this site. Wastes will not be stockpiled on site. Any wastes produced will be containerized and removed from the site in a timely manner. 11 . Please list all proposed on-site and off-site improvements associates with the use (example: landscaping, fencing, drainage, turn lanes, etc. ) and a timeline of when you will hae each one of the improvements completed. - Chain link fence surrounding the entire compressor station will be installed (3 strands of barbed wire with man gates installed for ingress and egress). TIMELINE: Permanent fence will be installed after 5 months from construction start. - Silt fence will be installed (buried 6" deep) prior to any grading work being started, BMP's will be in place as well as the water quality control volume pond (WQCV) as outlined in our drainage and erosion control plans. TIMELINE: Silt fence will be installed immediately upon receipt of the grading permit and the WQCV will be installed within 4 weeks of the start of the grading work. - No off-site improvements are associated with the Wells Ranch LLP Compressor Station. COMMUNICATIONS TOWER NARRATIVE In support of the USR Application submitted by DCP Midstream, LP ("DCP") for the Longhorn Compressor Station, DCP submits the following documentation pursuant to section 23-4-830 of the Weld County Code: 1 . DCP proposes to construct a radio communications tower up to 100 feet in height at the Longhorn Compressor Station site. DCP designs and constructs such towers at each of its facilities to allow for remote monitoring and control of the facilities. It is imperative that the communications tower be located in the immediate vicinity of the site to allow for the transmission of a reliable signal. Telecommunication Antenna Towers within a 10-mile radius of the site are not in proximity of the Longhorn Compressor Station site to allow for adequate signal transmission. In addition, due to safety cone :,:' , DCP does not co-locate its transmitters on third-party towers. Because the transmitters ar is.otilized to remotely control the compression and processing of naturs'r,),cs and other hazardou ffi3 32.a .ls, DCP requires that - . / DCP personnel be pe ::::� access t i .!_'towers and transmitters to ; 3vent intentional or acc: ntal disruption of commu-; on services. 2. The proposed communications tower will not constitute a hazard to aircraft due to its location. 3. The proposed communications tower will be located within the 20-acre leasehold estate, and thetiL%.)frre fall zone for the tower ,'j be located on the leas- -._ rid estate. 4. As noted in Section 1 of this narrative, DCP does not permit co-location on its radio communication towers for safety reasons. 5 . The proposed communications tower will be located on a remote location on the Wells Ranch. The tower will be as short as practicable to allow for sufficient signal transmission and will be constructed out of non-reflective materials. 6. Due to its location, as well as the fact that only DCP transmitters will be located on the tower, the proposed tower should not adversely affect human health. 7. The proposed tower will be no taller than the minimum height required for adequate signal transmission between DCP's radio communication towers located in the vicinity. 8. DCP will ensure that the proposed tower complies will all applicable federal and state regulations. 9. The proposed tower will be professionally engineered to ensure the structural integrity of the tower. 10. The proposed tower will be located within the secure fenced boundaries of the Longhorn Compressor station. 11 . Due to DCP's transmission requirements, the proposed tower will be situated in the only feasible location. 12. The proposed tower will be located adjacent to the Longhorn Compressor Station, and DCP does not anticipate any additional impact on wildlife caused by the tower. 13. DCP will submit a decommissioning plan as a condition of approval. .•rns, 1-) Sc tr ( II t tUPiren • , Lk) pr inicati •_�.r_�� - will Exhibit E Weld County Road Access Information DCP will access the site from WCR 68 via an existing private access gravel road (existing Access Permit #AP12-00236 across Section 19, Township 6 N, Range 62 W, of the 6th P.M. , Weld County, Colorado). All Contractors and employees will follow safety recommendations made by the Weld County Public Works Department. No new Access Permit wilt be required. A private road easement with Wells Ranch LLLP is part of DCP Midstream's lease agreement granting access to the 20-acre leased site via an existing access road from WCR 68) as confirmed during a pre-application conference with Weld County Department of Planning Services. Guidelines used by contractors for DCP in the past to ensure the safety of other drivers using the roadway include: • Construction on the access road will only occur during the day. • Appropriate signage will be placed 500 ft from the construction site to warn drivers from both directions of upcoming construction. • As a general guideline, vehicles and equipment will not block county roads. If equipment is expected to temporarily obstruct traffic, cones will be used to direct traffic around the obstruction. If required, a Public Works permit will be obtained to comply with any traffic issues. FOR COMMERCIAL SITES, PLEASE COMPLETE THE FOLLOWING INFORMATION BUSINESS EMERGENCY INFORMATION: Business 997"56-9700Name: DCP Midstream, LP, a Delaware limited partnership Phone,. Address: 3026 4th Ave. may, ST, zip: Greeley, CO 80631 Business Owner. DCP Midstream, LP, a Delaware limited partnership Phone: 970-356-9700 Home Address: 3026 4th Ave. Clty, ST, Zip: Greeley, CO 80631 List three persons in the order to be called in the event of an emergency: NAME TITLE ADDRESS PHONE Greg Kardos Asset Director 3026 4th Ave., Greeley, CO 80631 970.373-7538 Tom Briggs Facility Supervisor 3026 4th Ave., Greeley, CO 80831 970-888-1840 Paul Park Compliance Coordinator 3026 4th Ave., Greeley, CO 80631 970-639-1908 Business Hours: 24 hours/daY Days: 7 days/week Type of Alarm: None Burglar Holdup Fire Silent Audible ♦ 'tA Name and address of Alarm Company: ' " Location of Safe: NIA fitAA►tf*4 tens ffa**-*R■nit t inn fret t*****try U tsti iJ&falloff*!*****#*AAA*1*1*** *AAAff***M1f*Riff/t!'t*Af tA£Z**o***I***ff*4fwwM in MISCELLANEOUS INFORMATION: Number of entry/exit doors in this building: NIA Location(s): Is alcohol stored in building? No Location(s): Are drugs stored in building? No Lccation(s): - Are weapons stored in building? No Location(s): The following programs are offered as a pubUc service of the Weld County Sheriffs Office. Please Indicate the programs of interest. X Physical Security Check Crime Prevention Presentation UTILITY SHUT OFF LOCATIONS: Main Electrical: ' N/A Gas Shut O€f. N/A Exterior Water Shutoff: N/A Interior Water Shutoff: N/A Exhibit N Preliminary Traffic Statement At a pre-application meeting with the Weld County Department of Planning Services held June 12, 2015, the County concluded that a traffic study for the Wells Ranch LLP Compressor Station site is not warranted due to the rural location of the site. However, a brief traffic impact summary follows: Traffic Impact Narrative DCP Midstream proposes to construct and operate a natural gas compressor station on undeveloped rangeland property about 9 miles northeast of Kersey, Colorado. The site is located about 1 mile south of Weld County Road 68. Access to the site will be via an existing gravel road on the northwest side of the property leading to an existing access point on WCR 68 (#AP12-00236). Since traffic impact on the existing gravel road will be minimal, DCP has no plans at present to modify the road or the access onto WCR 68. A new gravel road will be added from the Wells Ranch LLP Compressor Station that will connect to the existing gravel road to the north of our site (see the Overall Vicinity Map that shows the existing road access, existing gravel road and the proposed gravel road into our site). Traffic Impact During Construction Construction of the site will occur roughly between September 2015 and January 2016. During construction, an average of 20 passenger cars and trucks will visit the site daily during the work week, roughly coinciding with typical work hours of 6 am to 6 pm. The majority of the trips in and out of the site will occur at the start and end of typical work days. The daily traffic will come from the south (generally from Greeley and surrounding areas) traveling North on Highway 85, east on WCR 68, and then south on the existing gravel road at Wells Ranch to the site. Construction traffic will leave the same way at the end of the work day (this is also a requirement of the Wells Ranch owners). Truck traffic generated during construction will consist primarily of delivery trucks for construction equipment and materials. We would anticipate an average of one truck per day of various sizes. Truck traffic will be required to follow the same route in and out as described above. Traffic impact After Construction as Continuing Operations Once the compressor station becomes operational, traffic will be minimal. Since the plant is normally unoccupied, the only passenger truck traffic will be visits from site technicians to monitor equipment, at a rate of approximately one passenger truck twice a week. Exhibit O Waste Handling Plan Waste generation at the Wells Ranch LLP Compressor Station will be negligible. Oil and Gas waste/by-products will be temporarily stored on site in the following containers: • 1000 gal used engine oil tank — 1 • 1000 gal used coolant tank - 1 • 90 bbl slop oil tank - 1 • Spent filters • General refuse 6 yd. - 1 (monthly) Chemicals to be stored: • 1000 gal methanol tank — 1 • 1000 gal lube oil tank - 1 • 1000 gal coolant tank - 1 DCP containerizes all waste and contracts for its disposal. A spill prevention, control, and countermeasures (SPCC) plan will be developed to outline appropriate actions in the event of a spill. The plan will be specifically developed for the Wells Ranch LLP Compressor Station prior to initiation of start- up activities. It will cover secondary containment requirements, response actions, and waste disposal in the event of a spill or release. DCP has detailed policies and procedures in place which are followed in the event of any spill or release. DCP's SPCC plan will be written in accordance with requirements set forth by the Environmental Protection Agency. Waste handler and disposal facilities contracted by DCP Midstream are: Used oil and spent filters: January Environmental Services, Inc. , 2701 S. Prospect, Oklahoma City, OK 73129 (405-365-4892) Hauler: Produced water, Northern Plains Trucking, 1352 Factory Dr. , Ft. Lupton, CO 80621 970-351 -8870 Destination: Produced water, High Plains Disposal, 17754 WCR 32, Platteville, CO 80651 970-785-8189 General Refuse Hauler: Waste Management, 500 E. Vine Dr. , Ft. Collins, CO 80524 970-482-6319 General Refuse Destination: Waste Management, 40000 WCR 25, Ault, CO 80610 970-686-2800 Exhibit P Dust Abatement Plan During construction, water trucks will be used to maintain dust suppression at the Wells Ranch LLP Compressor Station. Also, a storm water management plan will be followed to mitigate soil erosion and sediment transport during the construction phase. After construction is complete, the site will be stabilized using native vegetation outside of the fenced area. Areas within the fenced boundary will be graveled, as will the access drive. If necessary, a water truck will be used to control dust during and after construction. - -_ _ , Exhibit Q Flood Hazards , The Wells Ranch LLP Compressor Station site is located in Section 19 on the FEMA Flood Insurance Rate Map below. The entire section is located in Zone C, above and outside of designated flood plain areas. 'Si 'iil ii AtPROXIMAitSCA'f H J000 0 ci II I I' Il I r Y[IIWflial ows 'lour - - - 1( I ( c e Y I (II fl CO3 INSURANCE RAE( MAP I' I I 1 I; iWELD it COUNTY, ,5 I 20 COLORADO 24 11 X11 / I NM( °UNutnn'DAREA 11 r' PAMPA 575 OF 1073 Il s•.Y..M.4.I0.14..I w,nasall if 11111 SITE /' I j , / lir i' I csnsu putt SKR ': 010246 0675 C .. I 4 ! ' MAP REVISED' ! EE►T[Y1[R 2t. 1112 // 29 . « Al "I \30(nil II 11 l II 11 ..,... ..... ..s 1 I w.NY.N.s•�i•Vie .•a... T...*4w-.. a.,One \ ` 1) Yr✓.1— e ......op Ye hoe.-.F.a.# lb l••a is lea I N•l.r• •. N.WA*Y Mel new—i.e....~I•.►.•..,.sl �.l.a• N Ii ! _rove. W .OVA Iv«Map%n.ease.... b..•r., - - - - - Exhibit R Geological Hazards The Wells Ranch LLP Compressor Station site is not within a defined geological hazard area. According to the Weld County Property Information Portal, the nearest geological hazard area is near the city of Frederick and is approximately 37 miles from the proposed compressor site. WILD COUNTY Welk Ranch LLP Compressor Station an • '•.I I%t ♦IAI'1'Ih.. u. ar iii owl iv 85. w.. 14 1 �. .` Net 14.41/Mer gar So ..•LMt. .. I iildl / - .1 , �� Tr Wells Ran LLP "r v•► Compressor tatlon as x.31 ctfwtryt•,� ItsCiAfcttp.�i 7• l/1 h.MI., non ;PI tifteas . ,1 71 K in I r '.. .P 0 // --'iiiirilu�x4.l , 14 •! totwi'knatnslrtuq a+.41 114efen4 el. airr- nlit 'U -- I.w]►Ntatz._.._.- --J._ _._. 1; 878,711 0 lit 4S1I 0 '3225 ? 1.15451 M feel I I WG1 1794 Web Merrator AI<duy Sphere C Weld Co;mryColorado THIS MAP IS NOT 7081 USED FOR NAV1GAT)DN Exhibit S Soils Report As shown on the soil map below, the Wells Ranch LLP Compressor Station site is comprised of Vona loamy sand with 0 to 9 percent slopes. Information on soils and their limitations came from the USDA, Weld County Soil Survey. The actual compressor station footprint will overlay two soil types: Soil #74 - Vona loamy sand (5 to 9 percent slopes) — 70% of project site Soil #72 — Vona loamy sand (0 to 3 percent slopes) — 30% of project site On-site soil tests will be conducted prior to any construction (soils report will be provided to Weld County), and the foundations for the Wells Ranch LLP Compressor facilities will be designed in accordance with the geotechnical engineer's recommendations. No particular geotechnical hazards are anticipated during the design and construction of the compressor station. 'ic I..,.. wet..; cc,.., ti i:;.� c,:Ur,i , Sir otenl pail e `s I?:ra'.> Rip.: I' LI.P i.:crl±F:le S,'1' SUCi t•1'r (I 0 • 1 I W u r •♦ I tit) • 1:i ill !r titre ' 3 unty •sdfl VG - I I tijost. ,_ _ , _ .____ ►• - JJ 1 93 -- l 8 - �r - LL - .1►' Y 7 -. � 3 � t' . yQ Ii i , ...III 1;3 t}{i v_u WOW wall. ataa WIC nisi. With Waal ex z r k ••.t•'fat I I110,opsf.donAWst.np►!1C •f%'IMI.s +' • ' a ts. :(r, rAt A ', • ' to, :. ' ��..,: 4/Ffl'.. "a';-!,,It. :4 ;.°':.- ' t 1•1,! 7..•7ntc' '. '•SI tie V : Ut1iilnr ! 3.1•.'&.1.1 1 NelunlResolrces Web S•vlS„✓vr.y S'2S,20if, al Conserva don Service Nalcrl.YCootrui lne Sell Suney Exhibit M DRAINAGE NARRATIVE INTRODUCTION DCP MIDSTREAM intends to construct and operate a Compressor Station within Weld County, approximately 0.5 mile south of Weld County Road 68 and 2.25 miles east of Weld County Road 69. The project site is located in the East %2 of the Northwest / of the Southwest 1/4 of Section 19, Township 6 North, Range 62 West of the 6th P.M. The USR parcel associated with the proposed Compressor Station is 20.0 acres in size and consists of undeveloped rangeland as well as existing gas/oil facility infrastructure and water facility infrastructure. The Compressor Station area is comprised of approximately 3.7 acres (area located within barbed wire fence) and is located within the easterly half of the 20.0 acre USR parcel. The parcel is not located within a FEMA regulated floodplain. RUN-OFF PATTERNS Stormwater runoff generated within vicinity of the USR parcel generally sheet flows from northwest to southeast with slopes ranging from 3-5%. After exiting the USR parcel (east boundary of the parcel), the runoff generally flows south/southeast and into the South Platte River, approximately 9 miles southeast of the project site. The USR parcel accepts upstream runoff along the north and west property lines from approximately 7.5 acres of undeveloped area. Runoff generated within the north half of the USR parcel sheet flows southeasterly, across an existing gravel road (un-named) and into an adjacent parcel (owned by Wells Ranch). Runoff generated by the south half of the USR parcel also flows southeasterly and crosses over the existing road at a low point near the southeast corner of the USR parcel . A small portion of the USR parcel (0.4 acre near the southwest corner of the parcel), flows south, over an existing gravel road (un-named) and into the adjacent parcel (owned by Wells Ranch). Although minor ponding along the east boundary of the USR parcel may occur during larger storm events, the existing project site does not appear to have issues with stormwater runoff conveyance. In the proposed conditions, the intent is to direct the offsite runoff around the Compressor Station and proposed water quality pond through the use of berms/swales on the north and west sides of the Compressor Station. Areas outside the Compressor Station that are disturbed during construction (including soil stockpile and contractor parking areas) shall be restored to pre-development conditions and shall match historic runoff conveyance paths. ONSITE RUNOFF The majority of the stormwater runoff generated by Compressor Station area will be directed to a proposed water quality pond via sheet and swale flow. Due to the location of the proposed fence and existing topography, same areas within the fence (which will be reseeded after grading activities) will not be directed to the water quality pond. The total area which will be directed to the pond is 2.8 acres Page I 1 Wells Ranch Compressor Station; Weld County USR Application Package June 30, 2015 and includes all proposed areas with impervious surfaces (gravel, buildings, equipment), while the fenced area encompasses approximately 3.7 acres. SITE I MPEVIOUSN ESS The USR parcel is made up of undeveloped rangeland as well as existing gasjoil facility infrastructure and water facility infrastructure (including gravel roads). The historic and developed imperviousness for the USR parcel has been estimated as follows: Historic USR Parcel % Impervious: 4.9% (Based upon topographic survey and aerial imagery data. Please note: Although the existing groveled areas are not all "packed", a 40% imperviousness was held for these areas. Therefore, the Historic % Imperviousness is a conservative estimate.) Developed USR Parcel % Impervious: 8.0% Since the overall imperviousness of the USR parcel is not greater than 10% in the developed condition, it is assumed that Weld County will view the improvements as an "insignificant impact" on the existing drainage conveyance system. Therefore, the intent is to provide a water quality pond, sized in accordance with Weld County WQCV requirements. WATER QUALITY POND The proposed water quality pond is located near the southeast corner of the Compressor Station. The pond has been designed to provide a WQCV based upon Weld County requirements. Weld County WQCV Pond Sizing Information: Water Quality Pond Tributary Area : 2.78 acres Developed Basin % Imp.: 24% WQCV (per Weld County Worksheet): 0.03 ac-ft Proposed Water Quality Pond Information: Pond Invert: 4778.38 Required WQ Volume: 0.03 ac-ft WQ Volume Provided: 0.06 ac-ft WQ WSE: 4780.50 Emergency Overflow Elev: 4780.50 Top of Pond Embankment: 4782.00 Freeboard Provided: 1.5 ft The water quality pond will include the following additional design elements: 1. Pond contains a volume of 0.06 ac-ft which is twice the volume required by Weld County. 2. The pond release will consist of a concrete wall that will include a trash rack and water quality plate. The water quality plate has been designed based on 40-hour release rate. 3. The pond includes an emergency overflow. The crest of the pond overflow is the top of the wall which contains the water quality plate. The emergency overflow has been sized to accommodate the 100-yr developed inflow rate into the pond. Page f2 Wells Ranch Compressor Station; Weld County USR Application Package June 30, 2015 4. The pond will be located within the fenced area to protect animals and humans from accessing the pond area. The water released as well as emergency overflows from the pond will be conveyed overland east/southeasterly to match existing flow patterns, and cross an existing gravel road (unnamed) and enter an adjacent parcel which is also owned by Wells Ranch. CONCLUSION The proposed water quality pond has been sized in accordance with Weld County design standards. Development of the project site should not adversely affect adjacent parcels/improvements. ATTACHMENTS Please refer to the drainage exhibit, calculation and supporting information attachments which follow this narrative for sizing calculations. 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U U Q N ;. (V O . ` C o v4 0 ` _I � may � .>< - >. 88 v W G N Q to O c N O N O O h 3 U m v t, -I- CI a — •• o c ¢ v w Fry •-- U 0 ._ = z Q i►` g p v in Xi Qin 10 N kr)0) m 0 ri O 8 tC l `�' d: H C1 G ` a Q W C o d ONO t�D Li) to N tD QQ11 l0 00 CyJy �y n m CC li a IT 04 Q Gl R N c cD U'1 O N O a O1 I{ I Z — C� o Z Q `/! N N .N-1 Qz' N .N-1 in OOO N Z m- It i{ O 4 t0 —I C) v � 4 el C m to w ^-• U C T4 - C3` r z o z vFi `n A + 3 co to 0 w n N N m I Q r O 3 a U a w F `� U 0 0 0 o c d u.. — m U co to c z o � o ¢ oN N IQ 0 o U O� to U C) Water Quality Feature Calculations Weld County Planning Services/Engineering Date ######## Enter Project Name: Wells Ranch Compressor Station Enter Case Number: Surface Area (SF) Area (acres) % Impervious i Roof 4,580 0.11 90% 0.9 Paved 0 0.00 100% 1.0 Gravel/Crushed Asphalt 60,220 1.38 40% 0.4 Grass/Undeveloped 1.29 2% 0.02 Total Site (Acres) I 2.78) Note: 1 ac = 43,560 sf Weighted imperviousness (i) = 0.242 WQCV=a*(0.91 i 3-1. 19,2 +0. 78x) 6-hr drain time a = 0.7 12-hr dram fine a = 0.8 24-hr drain lime a = 0.9 40-hr drain time a = 1.0 Water Quality Calulation Volume (WQCV) = 0. 1321 Required storage — W• 3CV (Area) 12 Required storage = 0.0306 acretfeet 1,333 cu ft Job No, 15012 Wells Ranch 06/30/2015 Proposed Compressor Station Drainage Narrative WATER QUALITY POND VOLUME CALCULATIONS Required Water Quality Capture Volume (From Weld County Water Quality 1,333 (ft3) 0.03 (ac-ft) Feature Calculation Sheet): POND VOLUME a 1/3(A1+A2+(A1*A2 ^0.5)*D DETENTION POND 1NCREM CUMM. CUMM. ELEV AREA VOLUME VOLUME VOLUME SQ FT (ft3) (ft3) (ac-ft) 4778.40 0 0 0 0.00 4779.00 621 124 124 0.00 WQCV 4780.00 1,885 1,196 1,320 0.03 4780.50 2,805 1,165 2,485 0.06 4781.00 4,007 1,694 3,014 0.07 Freeboard 4781.50 6,574 2,619 5,633 0.13 Pond volumes based on Prismoidal Method calculations Note: Pond Volume provided is twice the volume required by Weld County. 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I I �\ e":" v ("1" II :::::.... ji o Z ..k. .. �� N //ll 2\ 0 RUNOFF DRAINAGE CRITERIA MANUAL (V. 1 ) TABLE RO-5 (Continued)—Runoff Coefficients, C Percentage Type A NRCS Hydrologic Soils Group Imperviousness 2-yr 5-yr 10-yr 25-yr 50-yr 100-yr 0% 0.00 0.00 0.05 0. 12 0. 16 0.20 5% 0.00 0.02 0. 10 0. 16 0.20 0.24 10% 0.00 0.06 0. 14 0.20 0.24 0.28 15% 0.02 0.10 0. 17 0.23 0.27 0.30 20% 0.06 0.13 0.20 0.26 0.30 0.33 25% 0.09 0.16 0.23 0.29 0.32 0.35 30% 0. 13 0.19 0.25 0.31 0.34 0.37 35% 0. 16 0.22 i 0.28 0.33 0.36 0.39 40% 0.19 0.25 0.30 0.35 0.38 0.41 45% 0.22 0.27 0.33 0.37 0.40 0.43 50% 0.25 0.30 0.35 0.40 0.42 0.45 55% 0.29 0.33 0.38 0.42 0.45 0.47 60% 0.33 0.37 0.41 0.45 0.47 0.50 65% 0.37 0.41 0.45 0.49 0.51 0.53 70% 0.42 . 0.45 0.49 0.53 0.54 0.56 75% 0.47 0.50 0.54 0.57 0.59 0.61 80% 0.54 0.56 0.60 0.63 0.64 0.66 85% 0.61 0.63 0.66 0.69 0.70 0.72 90% 0.69 0.71 0.73 0.76 0.77 0.79 95% 0.78 0.80 0.82 0.84 0,85 0.86 100% 0.89 0.90 0.92 0.94 0.95 0.96 RO-12 2007-01 Urban Drainage and Flood Control District DRAINAGE CRITERIA MANUAL (V. 1 ) RUNOFF Table RO-3--Recommended Percentage Imperviousness Values Land Use or Percentage Surface Characteristics Imperviousness Business: Commercial areas 95 Neighborhood areas 85 Residential: Single-family Multi-unit (detached) 60 Multi-unit (attached) 75 Half-acre lot or larger Apartments 80 Industrial: Light areas 80 Heavy areas 90 Parks, cemeteries 5 Playgrounds 10 Schools 50 Railroad yard areas 15 Undeveloped Areas: Historic flow analysis 2 Greenbelts, agricultural 2 Off-site flow analysis 45 (when land use not defined) Streets: Paved 100 Gravel (packed) 40 Drive and walks 90 Roofs 90 Lawns, sandy soil 0 Lawns, clayey soil 0 * See Figures RO-3 through RO-5 for percentage imperviousness. CA = KA + (1 .31i 3 1 .44i2 + 1 . 135i - 0. 12) for CA ≥ 0, otherwise CA = 0 (RO-6) CCD ~ KcD + (0.858i3 — 0.786i2 + 0.774i + 0.04) (RO-7) Cg — (CA + CcD ��2 2007-01 RO-9 Urban Drainage and Flood Control District RUNOFF DRAINAGE CRITERIA MANUAL (V. 1 ) in which: i = % imperviousness/100 expressed as a decimal (see Table R0-3) C,4 = Runoff coefficient for Natural Resources Conservation Service (NRCS) Type A soils C = Runoff coefficient for NRCS Type B soils Co) = Runoff coefficient for NRCS Type C and D soils KA = Correction factor for Type A soils defined in Table RO-4 Ka) = Correction factor for Type C and D soils defined in Table RO-4 Table RO-4--Correction Factors KA and Ka, for Use with Equations RO-6 and RO-7 Storm Return Period NRCS Soil Type 2-Year 5-Year 10-Year 25-Year 50-Year 100-Year C and D 0 -0.10i + 0. 11 -0. 18i + 0.21 -0.28i + 0.33 -0.33i + 0.40 -0.39i + 0.46 A 0 -0.081 + 0.09 -0.14i + 0.17 -0.19i + 0.24 -0.22i + 0.28 -0.251 + 0.32 The values for various catchment imperviousnesses and storm return periods are presented graphically in Figures RO-6 through RO-8, and are tabulated in Table RO-5. These coefficients were developed for the Denver region to work in conjunction with the time of concentration recommendations in Section 2.4. Use of these coefficients and this procedure outside of the semi-arid climate found in the Denver region may not be valid. The UD-Rational spreadsheet performs all the needed calculations to find the runoff coefficient given the soil type and imperviousness and the reader may want to take advantage of this macro-enabled Excel workbook that is available for download from the District's web site www.udfcd.orq under "Download" — "Technical Downloads." See Examples 7.1 and 7.2 that illustrate the Rational method. The use of the Rational method in storm sewer design is illustrated in Example 6. 13 of the STREETS/INLETS/STORM SEWERS chapter. RO-10 2007-01 Urban Drainage and Flood Control District L _ _ _ . _ _ Exhibit T - Stormwater Management Plan See attached Stormwater Management Plan for the Wells Ranch Low Low Pressure Compressor Station. Prepared for: DCP Midstream Denver, Colorado sistometawszata, ama. Storm Water Management Plan Wells Ranch LLP Compressor Station June 14, 2015 Prepared by: Wkite Engineering Inc. Table of Contents 1 .0 Introduction 1 2.0 Site description 2 2. 1 Sequence of major activities 2 2.2 Area estimates 3 23 Description of topography and soils 3 2.4 Description of vegetation 3 2.5 Potential pollution sources 3 2.6 Allowable sources of non-storm water discharge 5 2.7 Receiving water 5 3.0 SWMP permit area figures 6 3. 1 Site Layout 7 4.0 Best Management Practices (BMPs) 9 4. 1 Erosion and sediment control BMPs 9 4. 1 . 1 Structural practices 9 4. 1 .2 Non-structural practices 10 4.2 Other controls and BMPs 10 4.2. 1 Good housekeeping practices 11 4.2.2 Materials handling and spill prevention 11 4.2.3 Vehicle maintenance and fueling 14 4.2.4 Tracking controls 14 4.2.5 Waste management and disposal 14 4.2.6 Concrete Washout Control 14 4.2.7 Dewatering Controls 15 4.2.8 Dust Control 15 4.3 Phased BMP implementation 16 4.4 Final Reclamation . . . 16 5.0 Final stabilization and long-term storm water management 17 5. 1 Seed Mix 17 6.0 Inspection and maintenance 18 6.1 Inspection schedule 18 6.2 Inspection Procedures 19 6.3 BMP maintenance and replacement of failed BMPs 19 6.4 Recordkeeping and inspection documentation 20 7.0 Plan revisions and retention 21 8.0 Inactivation notice 22 9.0 Signature 23 List of Figures Figure 1 Site Vicinity Map 6 Figure 2 Site Topographic Map 7 Figure 3 Site Soil Map 8 Figure 4 Spill Response Flow Chart 12 List of Appendices Appendix A Stormwater Application and Permit Appendix B USR Plans including Erosion and Sediment Control BMPs Appendix C Inspection and Maintenance Report Form Appendix D Inactivation Form ii DCP Midstream Storm Water Management Plan Wells Ranch LLP Compressor Station June 10, 2015 1.0 Introduction DCP Midstream (DCP) is committed to maintaining water quality standards throughout construction of the Wells Ranch LLP Compressor Station. This Storm Water Management Plan (SWMP) has been prepared in order to identify all potential sources of pollution which may reasonably be expected to affect the quality of storm water discharges associated with construction activity within this SWMP permit area. This SWMP for DCP's Wells Ranch LLP Compressor Station site satisfies the Colorado Department of Public Health and Environment (CDPHE) Water Quality Control Division (WQCD) General Permit No. COR- 030000 issued on May 31 , 2007, for Storm Water Discharges Associated with Construction Activities (the Storm Water Construction Permit). This SWMP has been prepared in compliance with CDPHE WQCD, the Federal Clean Water Act (CWA), and the National Pollutant Discharge Elimination System (NPDES) Permit regulations found in 40 CFR, Part 122.26 for storm water discharges. DCP has submitted a General Permit Application to WQCD, a copy of which is provided within Appendix A. The actual permit is also provided within Appendix A. The SWMP Administrator is responsible for the process of developing, implementing, maintaining, and revising this SWMP, as well as serving as the comprehensive point of contact for all aspects of the facility's SWMP. SWM P Administrator: During construction After construction Matthew Knepper, PE Matthew Pickett 370 17th Street 3026 4th Avenue Denver, CO 80202 Greeley, CO 80631 (970) 605-2250 (970) 378-6390 (970) 539-1823 1 DCP Midstream Storm Water Management Plan Wells Ranch LLP Compressor Station June 10, 2015 2.0 Site description DCP Midstream proposes to build the Wells Ranch LLP Compressor Station approximately 8 miles east of Greeley, Colorado. The site consists of an approximately 4-acre compressor station site on a 20-acre parcel and a 400-linear-foot by 20-foot-wide (0. 1 acre) access road. The purpose of the compressor station is to foster oil and gas development by moving raw natural gas through associated natural gas pipelines in the Weld County area. As shown on the Site Vicinity Map (Figure 1 ) and the Site Topographic Map (Figure 2), the Wells Ranch LLP Compressor Station is located in the E 1 /2 of the NW 1/4 of the SW ' of Section 19, Township 6N, Range 62W of the 6th Principal Meridian, Weld County, Colorado, and is accessed via Weld County Road 68. As construction of the facility allows, the area surrounding the site will continue with agricultural rangeland production. The facility will be a permanent installation. 2. 1 Sequence of major activities Construction activities for the site will be completed in the following sequence: Preconstruction: 1 . Topographic, vegetation, wildlife, and archeology surveys, as required per site and regulatory conditions 2. Installation of erosion and sediment control BMPs at the perimeter of construction areas 3. Protection of existing vegetated areas to remain Construction: 4. Clearing and grubbing of existing vegetation 5. Topsoil stripping and stockpiling 6. Grading and leveling of the project area 7. Graveling the operational areas 8. Construction of the permanent facility Interim Reclamation: There is no interim reclamation phase for this compressor station. Final Reclamation 9. Installation of any erosion and sediment control BMPs necessary after construction 10. Revegetation and installation of other non-structural erosion and sediment control BMPs, as necessary 11 . All debris, including vegetation, trash, construction materials, etc. , will be removed and properly disposed of during final reclamation. 2 DCP Midstream Storm Water Management Plan Wells Ranch LLP Compressor Station June 10, 2015 Final stabilization is reached once the entire permit area has been reclaimed through the process of final reclamation. Final stabilization is fully described in Section 5.0, and a more detailed description of each phase of construction is provided in Section 4.3. 2.2 Area estimates The total disturbance area of the proposed Wells Ranch LLP site is roughly equivalent to the total site parcel area of 20 acres, of which approximately 4 acres will be the area permanently developed in the area of construction. The site construction area consists of a 6-acre compressor station site and a 400-linear-foot by 20-foot-wide (0. 1 -acre) access road. Additional temporary use areas outside of the proposed construction area may be used as needed during construction. Clearing includes the removal of brush and other vegetation from the construction site. This activity typically disturbs soils, increasing the potential for erosion and sedimentation. The work boundaries will be clearly defined to ensure that no disturbance occurs beyond the construction site edges. Any woody vegetation that has fallen beyond the edge of the construction site will be removed as soon as possible. No woody vegetation outside of the construction site will be cut to obtain timber for construction purposes. This SWMP covers the entire Wells Ranch LLP project area and any additional temporary use areas that may be necessary (2 acres for contractor laydown yard and 4 acres of permanent construction disturbance. The total area of the site will be the same as the total area that will undergo clearing, excavation, grading and/or temporary graveling and is estimated to be approximately 6 acres. These area estimates are used to help determine the extent of control measures needed. 2.3 Description of topography and soils The following table lists the soil types found within the proposed site, the percent slope the soil is found on, and the approximate percent of the total developed site area where that soil type is found. Soil Type _ % Slope Found On % of Site Vona loamy sand 5 to 9 70 Vona loamy sand _ _ 0 to 3 30 A site soil map provided as Figure 3 indicates two different soil types found within the Wells Ranch LLP site. The dominant soil on the property is Vona loamy sand, 5 to 9 percent slopes. This soil is a moderately well- drained soil with a moderate infiltration rate when thoroughly wet. 2.4 Description of vegetation The area surrounding the proposed project site is dominated by rangeland, and the current land use in the project area is rangeland. 2.5 Potential pollution sources The most common source of pollution during construction is sediment resulting from the erosion of recently cleared and/or graded areas, such as cut/fill slopes and soil stockpiles. However, there may be many potential sources of pollutants at the site. Each of the following potential sources of pollution was considered for this project. If applicable, BMPs used to control the pollutant source are described in the fisted sections. 3 DCP Midstream Storm Water Management Plan Wells Ranch LLP Compressor Station June 10, 2015 Potential Pollution Source Applicable to this project. If YES describe. See Section(s) All disturbed and stored soils No ] Yes ® 4. 1 Describe: Soils will be disturbed by grading activities and may be temporarily stockpiled. Vehicle tracking of sediments No ❑ Yes ® 4.2.4 Describe: Sediments may be potentially tracked from the construction site via vehicle tires. Management of No N< Yes 4.2.5 contaminated soils Describe: No contaminated soils are anticipated. Loading and unloading No ❑ Yes ® 4.2.2 operations Describe: Equipment, pipe and some chemicals may be loaded and unloaded. Outdoor storage activities No ❑ Yes ® 4.2. 1 Describe: Soil piles resulting from excavations and grading may be stored temporarily in a designated area. Equipment and pipe may also be stored in designated areas. Vehicle and equipment No ❑ Yes 4.Z3 maintenance and fueling Describe: There may be some fueling of equipment. There will be no maintenance of vehicles or equipment at the site. Significant dust or particulate No ❑ Yes ® 4.2.8 generating processes Describe: Disturbed soils and vehicle activity can result in an increase in dust at the construction site. Routine maintenance No ® Yes , 4.2. 1 activities involving fertilizers, pesticides, detergents, fuels, Describe: None anticipated. solvents, oils, etc. On-site waste management No Li Yes ® 4.2.5 practices including waste piles, liquid wastes, Describe: Construction debris, excavated soils, and dumpsters, etc. hydrostatic test water will be generated. All will be properly containerized and removed from the site in a timely manner. Concrete truck/equipment No ❑ Yes ® 4.2.6 washing, including the concrete truck chute and Describe: There will be some concrete work. associated fixtures and Truck/equipment washing will be minimal and done in a equipment specific location. Washwater will not be allowed to leave site. Non-industrial waste sources No ❑ Yes ® 4.2.5 such as worker trash and portable toilets Describe: Worker trash, paper goods may be generated and will be properly containerized and disposed of in a timely manner. Portable toilets will be maintained in proper fashion. Asphalt/concrete batch plants No ® Yes Not applicable on the site Describe: Not applicable 4 DCP Midstream Storm Water Management Plan Wells Ranch LLP Compressor Station June 10, 2015 2.6 Allowable sources of non-storm water discharge Allowable sources of non-storm water discharge within the permit coverage area include the following: • Construction dewatering • Concrete washout • Emergency fire fighting water There are no known springs or landscape irrigation return flows within the permit area. No other non-storm water discharges are allowed under the Storm Water Construction Permit. Other types of non-storm water discharges must be addressed in a separate permit issued for that discharge. 2.7 Receiving water To the extent possible, runoff from the Wells Ranch LLP site will be captured through the use of the erosion and sediment control BMPs discussed in this SWMP. However, runoff from open areas and allowable discharge from BMPs will likely flow into unnamed mapped intermittent gulleys located at the south boundary of the site. This drainage flows south into unnamed tributaries of the South Platte River, approximately 10 miles south of the site. 5 DCP Midstream Storm Water Management Plan Wells Ranch LIP Compressor Station June 10, 2015 3.0 SWMP permit area figures An overall site vicinity map for the proposed Wells Ranch LLP site is provided as Figure 1 . A site topographic map with the site location is provided as Figure 2 and is discussed in the following section. A more detailed site topographic map detailing locations of Best Management Practices is included in Appendix B. Figure 1 . Site Vicinity Map ,, I EM Ya {I . 1 _ .._- _ __ • _-. _ ter .- - . _c._ ,, - - - [ . CAN ft , l l , I,� if 1aleto J r -f,r er 313 r: 11 I a ,p�AJlw J —. -� - - -- a�� J� 1'A r) lira I {1 pjft fi:t �C5� T . �. S s -I \ era* .:- r 7 sz:,J,7,.li...._--1:11.? - =,,,•;_.-_. _ .7,. i____; f I ..,..k 0::,=:• er, �v .: Jim I g ° n�ds`ee L erns �� t _ i. .1 l�! N i� �� r 11#;. �7:i r.. I�- a a{ 1! 7 (, -. ,t . ', , a.: lam: - 1 1 i,, ! �'" 11 ., 1 •• I i s "I. -s.,. a ,■ -a: -' — — r Qagt- T I 1 Ar . ____, ; '� 1 r - N1NakilLLS II j� 'r. - :ar ..v IiDii.. i i =b.,,,_,_ bin ,kumpn,CBTttrf� r rnra � 1 ' T y It No - �I �f- - -. 1 tea - . __ r, ; ?- ' SITE �/ **sow' i t!5 9 ��+i# (alb{e 7, = a • •al.i 1' r!Viti d 1 N- -� CIN7 Ifs'' �1. { - f innf,��.\ p - +Y- .. n _ as r-.�}IM111 1i i GY , e - --- Id w GletittiPL, Itn.4..1- las -CS k 1..‘ :•,C.• - ir„ , - r:. '_,1- I Y rrir1! >Iw g_,ate. .. .I 11tH irt \`.1'1 , ' D is to• :$1I.111;,i .%ft: ;,a,r-Tion ..:4.1 I ..,..; , ,a ... „. „ aI ,u� l S, iti s` ,, lies.iieir -- cJ.tttarrtnl.��n+.tF► ,I "' , 'r.--ii 1f II ..` _ ON -a'aeit lrn �•.` �1�fatr tam 5; -.. N'L.DL}2'h' 1 :�:v - :1,:,•;-y• • ,11yi�: ,. �Aslbt/ln/f ti; t.,. - ..4 .� n,-_v_4f;.- �a�• 1� , •. .7 II 111: , - ! • I C. I L •+S•at-- ,y'v ... - + - 4 • .o i w11 , I .� I;� t v-,Ip - IED-111-11_,__ if a' •I •:t! _ m _ to _ �. '• �: "alu ej srsr -Atz tears c. I twill clw r II ll ti r..� i rder 4 p.. ___ — - -Cottage lit Slid - I:. i r •14 I �� a. r: y 1 41_ 1 I Iglu in Uttar 0 t A• . ..".. 7 �- . -a .. 6 DCP Midstream Storm Water Management Plan Welts Ranch LLP Compressor Station June 10, 2015 3.1 Site Layout A site topographic map of the project area is provided as Figure 2, and includes: • Construction site boundaries • Topographic gradients BMP locations (relative to construction site boundaries and topographic gradient) are shown in detail on the construction plans attached as Appendix B. Figure 2. Site Topographic Map 1 ti to aux t cii"o�ss' . a 4 3 --st ,4 / 14 X13 18 �,•--*4s+ctojRacks 17 Is .. .. / +,1 .1 • - . rr ^ , !, / ✓ J 1 J .. ... li r M les'.;, ' 41:1,, - - , t CC WLt 4 Conn is N 4 r ti Y \ it 1 a,r 1 : 24 4 ,sh — 19 i ‘, 20 .fir, , � � � srr � _ 1 ) I . s ty Z \ \i� 1 1 --- �'� ' 1 - tow g I� 8 y 304:;,, \ 25 _ / \ r 29 st J ii `IV l it I 1 VIr Lele I C 36 r i ,I 32 it _- - - - - - �. _ _- - — — cows=. 7 DCP Midstream Storm Water Management Plan Wells Ranch LLP Compressor Station June 10, 2015 Figure 3. Site Soil Map Sot Map Slid C uM, Colrra0t. S tune kr. Pa.. 1'19eiss Rutty,LL P Clacl*n•xi ?Mares i L . rr. -4.te •. 2tL•x I I I I I 1 I . Y le 4V sa at 441 .1Ceur!, Read W - .6 4 r t ti ' A J 3 , - p'. i e1 r r tf' K! ' •, • I ti ' r i 7 .. 1 S. 1 l.•• .., i , . .1 . iQ , ar 41 -Sr . I R t . SITE .r • f' r la LE 1 VI o a S'_.l♦ ¢ -2...--$4 ... - . . .:l8:1 L.16i: istop LA.7* 1 ••rat r irnrd to Awwww,-i[R t: - WFs 1'0)0 VAX mu AI1v nt►`[1M._ALt Fitt tittY ::Cron Si1/44 trial'_' r'rv.:il• :r'*it r ."�i ;s: '.:I :,: i11 Iea* NaauSR.wurea Web Sc.!Slowly 'e* 0., t I• a Consarvalion Seems Na tor al Gtopotalve Sas Survey Soil Number Soil Type % Slope % of DevelopedSite 74 Vona loamy sand 5 to 9 70 72 Vona loamy sand 0 to 3 30 8 DCP Midstream Storm Water Management Plan Wells Ranch LLP Compressor Station June 10, 2015 4.0 Best Management Practices (BMPs) A key component of this SWMP is employing BMPs to improve storm water quality. Local factors will be evaluated to determine what BMPs are suitable and practical at different locations. The following is an overview of common BMPs which DCP Midstream may employ in different combinations during construction activities and phases as conditions warrant. 4.1 Erosion and sediment control BMPs The primary methods for controlling erosion or sediment transport consist of minimizing on-site disturbance of the soil and ground cover and providing measures to retain sediment on site if erosion should occur. In order to accomplish this goal, two different types of BMPs may be utilized: structural and non-structural. The following section gives a brief description of the two types of controls and the erosion and sediment control BMPs that may be used at the site. More detailed descriptions, design criteria, construction specifications, and maintenance information for all erosion and sediment control BMPs are located in Appendix B of this plan. 4.1 .1 Structural practices Structural controls handle sediment-laden storm water prior to its leaving the site. Structural BMPs are used to delay, capture, store, treat, or infiltrate storm water runoff. Structural BMPs that may be used for this project include: • Berms/ditches/diversions — These types of controls convey surface runoff from disturbed areas to a stabilized outlet or divert surface runoff away from disturbed areas. A stabilized outlet can be any kind of sediment-trapping device or simply a well-vegetated and stabilized area. • Dewatering device — A dewatering device is a sediment control used to settle or filter sediment from dewatering operations. • Gabions — Gabions are rectangular, rock-filled wire baskets that are pervious, semi-flexible building blocks which can be used to armor the bed and/or banks of channels or to divert flow away from eroding channel sections. • Riprap — Riprap is a permanent, erosion-resistant layer made of rock or boulders. It is intended to stabilize areas subject to erosion, such as fill slopes, and protect against scour of the soil caused by concentrated, high-velocity flows. • Silt fence — Silt fences consist of a length of filter fabric stretched between anchoring posts spaced at regular intervals along the site perimeter to slow runoff and capture sediment. • Stabilized construction entrance -- A stabilized construction entrance is a gravel pad that is typically located where construction traffic leaves or enters an existing paved road. The gravel pad helps to minimize the amount of tracked mud and dust that leaves a site. • Straw bale barriers — A straw bale barrier is a series of entrenched and staked straw bales placed on a level contour to intercept sheet flows. The barrier reduces runoff velocity and filters sediment- laden runoff from small drainage areas of disturbed soil. The barrier may also be used to protect against erosion. • Water bars — A water bar is an earthen ridge, or ridge and channel, constructed diagonally across a sloping road, trail, or disturbed area that is subject to erosion. Water bars are normally used for drainage and erosion protection of buried pipelines or closed, blocked, or infrequently used roads to limit the accumulation of erosive volumes of water by diverting surface runoff at pre-designed intervals. 9 DCP Midstream Storm Water Management Plan Wells Ranch LLP Compressor Station June 10, 2015 • Wattles — A wattle (also called a fiber roll) consists of a tight tubular roll of straw, flax, or other similar materials. Wattles can be used along slopes, as check dams in ditches, or at outlets of sediment traps to reduce erosion, reduce runoff velocity and provide removal of sediment. Guidelines for the construction and use of these structural controls are presented in Appendix B of this document. 4.1 .2 Non-structural practices Non-structural BMPs are intended to reduce the generation and accumulation of pollutants, including sediment, from a construction site by stabilizing disturbed areas and preventing the occurrence of erosion. The following stabilization techniques are not only the most effective method for reducing soil loss, they are normally the most cost effective due to low initial cost and reduced maintenance requirements. Non-structural BMPs that may be used for this site include: • Erosion control blanketing — Erosion control blankets are porous fabrics and are manufactured by weaving or bonding fibers made from organic or synthetic materials. Erosion control blankets are installed on steep slopes, over berms, or in channels to prevent erosion until final vegetation is established. Blankets can also be used as separators or to aid in plant growth by holding seeds, fertilizers, and topsoil in place. • Grading techniques — Land grading involves reshaping the ground surface to planned grades as determined by an engineering survey, evaluation, and layout. Techniques include proper cut and fill practices to ensure stability, crowning or sloping to properly route runoff to outlets, surfacing with gravel to avoid mud and rutting, and surface roughening to reduce runoff velocity, trap sediment, and prepare the soil for seeding and planting. • Mulching — Mulching uses materials such as grass, hay, wood chips, wood fibers, or straw to stabilize soils by minimizing rainfall impact and reducing storm water runoff velocity. When used in combination with seeding or planting, mulching can aid plant growth by holding seeds, fertilizers, and topsoil in place, and can insulate plant roots against extreme temperatures. • Revegetation — Revegetation involves planting seed to establish a vegetative cover on disturbed areas. Vegetation reduces erosion and sedimentation by stabilizing disturbed areas in a manner that is economical, adaptable to site conditions, and allows selection of the most appropriate plant materials. Vegetation also absorbs the impact of raindrops, reduces the velocity of runoff, reduces runoff volumes by increasing water percolation into the soil, binds soil with roots, and protects soil from wind. • Vegetated buffer — Vegetated buffers (also known as vegetated filter strips) are areas of either natural or established vegetation that are maintained to protect the water quality of neighboring areas. Buffers reduce the velocity of storm water runoff, provide an area for the runoff to permeate the soil, contribute to groundwater recharge, and act as filters to catch sediment. The reduction in velocity also helps to prevent soil erosion. Guidelines for the construction and use of these non-structural controls are presented in Appendix B of this document. 4.2 Other controls and BMPs Other controls and BMPs include general site and materials management measures that indirectly aid in the minimization of water pollution. Types of pollution sources for this project are listed in Section 2.5. 10 DCP Midstream Storm Water Management Plan Wells Ranch LLP Compressor Station June 10, 2015 4.2. 1 Good housekeeping practices In general, the good housekeeping practices listed below will be followed on-site during construction and operation: • All material delivered and stored on site will be inventoried. • Employees trained in emergency spill clean-up procedures will be present when dangerous materials or liquid chemicals are unloaded. • Off-site storm water flows will be directed away from the loading/unloading area by grading, berming, or curbing the area. • An effort will be made to store only enough product required for task completion. • Ail materials stored on site will be stored in a neat and orderly manner in appropriate containers and, where possible, under a roof or other enclosure, and/or within secondary containment areas to avoid contact with storm water. • Products will be kept in their original containers with the original manufacturer's label. • Substances will not be mixed with one another unless recommended by the manufacturer. • Storage containers will be regularly inspected for leaks and repaired or replaced as necessary. Workers will be trained in proper storage and handling of fuels and other hazardous materials. • Whenever possible, all of the product will be used before disposing of the container. • Manufacturer's recommendations for proper use and disposal will be followed. 4.2.2 Materials handling and spill prevention All spills will be cleaned up immediately after discovery and will be reported to the appropriate agencies, in accordance with applicable regulations. A spill response procedure is in place to reduce the likelihood that oil released by container or equipment failures will reach navigable waters. The following is a flow chart with spill response and post-spill response procedures. 11 DCP Midstream Storm Water Management Plan Wells Ranch LLP Compressor Station June 10, 2015 Figure 4. Spill Response Flow Chart SPILL RESPONSE ACTIONS Spill Protect Eliminate Ignition Restrict Stop the Assess Discovered .1+ Yourself "4' Sources —+ Access ''srt+ Source if it —4 the Spill Can Be Done re—_.--IIMS- tr-r-STAIMairnnenCINCrt.aallagir-.... alas-St Strllirat=.051r Determine if Reportable MAKE INTERNAL Release NOTIFICATIONS 'w. MAKE EXTER M.aat-s.:w�rt NAL CONTAIN THE SPILL (Project Manager, NOTIFICATIONS Environmental Support) (Agencies) t Assistance by Assistance by Environmental Support Environmental Support AFTER THE SPILL IS CONTAINED Initiate Clean Up Coordinate Waste Complete Spill Replenish Emergency Training If (with outside , ,,,;, Disposal with _ Notification Form. Response Equipment ,. Necessary ., assistance if assistance of Submit to and Supplies Following required) Environmental Support Environmental Each Response Assistance by Environmental Support Environmental Environmental Prepares Written Support Submits Support External Reports ' "� Notification to EPA (Agencies) and Regional Coordinates Training as Administrator 12 DCP Midstream Storm Water Management Plan Wells Ranch LLP Compressor Station June 10, 2015 Upon discovery of a spill, the first on-site responder will contact the DCP Construction Project Manager. The DCP Construction Project Manager will initiate, support, or completely implement the spill response activities. Spill response materials, such as absorbent materials, shovels, booms and a tractor are maintained at the site to control and contain releases. Site personnel are trained in spill response procedures. Additional information on spill response procedures can be found at any DCP gas plant in their Spill Prevention Control and Countermeasure (SPCC) Plan. If necessary, the DCP Construction Project Manager will notify the public safety personnel. Emergency (fire and police) and medical (hospital and transportation) contacts are listed below. The assistance of these personnel can be used to minimize public exposure to the hazard, evacuate the public, control traffic, assist in fire control, and provide emergency medical care. The DCP Construction Project Manager is also responsible for notifying the Environmental Support. The Environmental Support will be responsible for notifying the appropriate federal, state, and local government agencies of the release. Once the release is contained, the situation will be evaluated to establish the personnel, materials, and equipment required for making repairs and cleaning the release area. The media impacted by the release and other related factors will be evaluated to determine the appropriate method of disposal of recovered materials from an oil release in accordance with applicable federal, state, and local regulations. The following disposal methods for recovered materials are typically used by DCP Midstream: • Off-site recycling or disposal for recovered liquids; • On-site bioremediation, off-site bioremediation, or off-site disposal for contaminated soils; • Off-site disposal for liquids and surface water recovered from impacted surface waters; and • Wastes generated from recovery activities are disposed off-site. Fire, Police, and Ambulance 911 Greeley Police Department (970) 350-9600 Galeton Fire Department (970) 454-0681 Weld County Sheriff (970) 356-4015 Weld County Highway Patrol (970) 857-6638 Weld County Ambulance (970) 353-5700 Northern Colorado Medical Center, Greeley (970)-352-4121 DCP Construction Project Manager Primary Environmental Support Mr. Matt Knepper Ms. Becky Malloy Office: (303) 605-2250 Office: (303) 605-1961 Cell: (303) 319-0835 DCP Compliance Coordinator Secondary Environmental Support Mr. Paul D. Park Mr. Matthew Pickett Office: (970) 378-6372 Office: (970) 378-6390 Mobile: (970) 539-1908 Cell: (970) 539-1823 13 DCP Midstream Storm Water Management Plan Wells Ranch LLP Compressor Station June 10, 2015 4.2.3 Vehicle maintenance and fueling Prior to use on-site, all equipment and machinery will be inspected for leaks to ensure proper operational conditions are met. Periodic inspections of equipment and control procedures will be implemented. While on-site, equipment will be parked and fueled within designated areas located at least 50 feet from waterbodies. Equipment may be fueled in place using fuel trucks. Catchment basins must be placed under all connections and an operator must be present during the fueling process. Only emergency maintenance on vehicles and equipment will be allowed. 4.2.4 Tracking controls Erosion and sediment controls will exist along all roadways, and stabilized construction entrances will be installed at locations where construction traffic leaves or enters an existing paved road. Stabilized construction entrances will be documented on the site map. Construction vehicles will remain on-site throughout earth-moving activities, and most other vehicles will remain in stabilized areas. Specific grading techniques and stabilized construction entrances are described in Appendix B, and include the use of slopes, gravel, and surface roughening to ensure stability, route runoff, avoid mud and rutting, reduce runoff velocity, trap sediment, and prepare the soil for seeding and planting. 4.2.5 Waste management and disposal All contracting companies, vendors, and DCP employees are required to manage all waste generated by their activities at the site in compliance with local, state, and federal guidelines. DCP utilizes a periodic inspection program to ensure waste management requirements are fulfilled and inspections are documented. Waste management procedures will include the following: • Proper bins will be provided for trash collection. Sediment barriers such as berms or other temporary diversion structures shall be used to prevent storm water runoff from contacting stored solid waste at the project site. • Contaminated soils will be placed into a lined and bermed area located at least 50 feet from a waterbody. Samples of the impacted soil will be collected and a complete characterization analysis will be performed. When applicable, the impacted soil will be sent to a licensed disposal facility. • The contractor will provide portable toilets. Sanitary waste will be regularly collected by a licensed sanitary waste management contractor and disposed of in an approved manner. Portable toilets will be located at least 50 feet from a waterbody. • In the event that sediment is inadvertently transported off the construction site, it will be collected and returned to the site and placed on the soil stockpile or spread over the construction area and compacted. If a minimal quantity migrates off-site, it will be spread or raked out to ensure there is no negative effect on natural vegetation. Locations of trash bins, portable toilets, contaminated soils, etc. , will be identified on the site map. 4.2.6 Concrete Washout Control All concrete waste shall be placed in a temporary concrete washout facility. Concrete washout water may NOT be discharged to surface waters or to storm sewer systems without separate permit coverage. However, discharge to the ground of concrete washout water from washing of tools and concrete mixer chutes may be authorized by this permit, provided that: 14 DCP Midstream Storm Water Management Plan Wells Ranch LIP Compressor Station June 10, 2015 1 . The location is identified on the site map; 2. BMPs, such as a lined hay bale structure, are used to prevent pollution of groundwater; and 3. These discharges do not leave the site as surface runoff or to surface waters. 4.2.7 Dewatering Controls Dewatering refers to the mechanical removal of water from an excavation. Both groundwater and storm water may require dewatering during construction and are discussed in the following sections. Additional dewatering information can be found in Appendix B. 4.2.7. 1 Groundwater Dewatering Non-storm water construction dewatering of groundwater can NOT be discharged to surface waters or to storm sewer systems without separate permit coverage. However, discharges to the ground of water from construction dewatering activities may be authorized by this permit, provided that: 1 . The source is groundwater and/or groundwater combined with storm water that does not contain pollutants in concentrations exceeding the state groundwater standards in Regulations 5 CCR 1002-41 and 42; 2. The quality and source of the water and the location of the dewatering is identified on the site map; 3. The uncontaminated water is pumped or diverted into a dewatering device or simply into a well- vegetated area to percolate into the ground and catch suspended sediment in accordance with Appendix B: 4. These discharges do not leave the site as surface runoff or to surface waters. 4.2.7.2 Storm Water Dewatering The discharge of pumped storm water (not including groundwater or other non-storm water sources) from excavations, ponds, depressions, etc. , to surface water or to a municipal separate storm-sewer system is allowed by the Storm Water Construction Permit provided that: 1 . The quality and source of water and the location of the dewatering is identified on the site map; 2. The uncontaminated water is pumped or diverted into a dewatering device or simply into a well- vegetated area to percolate into the ground and catch suspended sediment in accordance with Appendix B. 4.2.8 Dust Control Dust control practices (such as applying water or dust palliatives) will be implemented if necessary during construction operations to prevent dust and wind erosion from exposed soil surfaces. When implementation is necessary, water (or other dust palliative) will be applied to the site until the soil is moist, and can be repeated as necessary. However, the soil will not be oversaturated, causing runoff to flow from the site. The distribution system will be equipped with a proper spray system to ensure even water distribution. When a distribution system is unavailable, at least one mobile unit will be available at all times to apply water or a dust palliative to the site. All non-potable tanks, pipes, and other conveyances will be marked "non-potable water - do not drink." Seeding, mulching, and grading techniques (as described in Appendix B) are other methods that will be used to prevent dust and wind erosion. Spot-checks will be performed to ensure that dust and wind erosion control techniques are properly implemented. Areas where dust control practices are used will be documented on the site map. 15 DCP Midstream Storm Water Management Plan Wells Ranch LLP Compressor Station June 10, 2015 4.3 Phased BMP implementation Various BMPs will be implemented and maintained during different phases of the project. A description of each phase is as follows: • Preconstruction. The preconstruction phase involves the installation of temporary and/or permanent BMPs (such as vegetation buffers and wattles) around the site perimeter and at discharge points. This phase also involves the protection of existing vegetation that should not be disturbed during construction. • Construction. The construction phase involves clearing and grubbing, stripping and stockpiling of topsoil, grading and leveling of the project area, graveling the operational areas, construction of the permanent facility, and installation of additional BMPs to control erosion and sedimentation (such as straw bale barriers and silt fencing). • Interim Reclamation. There is no interim reclamation phase for compressor stations. 4.4 Final Reclamation The final reclamation phase primarily involves spreading of topsoil and seeding of all disturbed areas outside the fenced facility. Inside the fence and for the road, final reclamation phase will include using gravel in areas to prevent erosion and sedimentation. This phase also involves the installation of any additional BMPs that may be needed (such as water bars or silt fencing), as well as the continued maintenance and inspection of all BMPs until final stabilization occurs. Final stabilization occurs once all surfaces are built on, paved or graveled, and/or a uniform stabilized vegetative cover with a density of 70 percent of pre- disturbance levels has been established, or when an equivalent permanent, physical erosion reduction method has been employed. A further explanation of final stabilization is provided as Section 5.0 of this plan. Temporary controls may be used to control sediment and erosion during preconstruction and construction activities. Permanent controls may also be used during the initial phases of the project. However, only permanent controls will be used during reclamation. Temporary controls may be converted into permanent controls (such as revegetating a berm or diversion) if needed. The primary control used during interim and final stabilization will be revegetation outside the fence and gravel inside the fence. Seeding will occur as soon as possible after disturbance of an area is complete. If the seeding is not successful, the area will either be reseeded or other controls will be put in place until reseeding can occur. 16 DCP Midstream Storm Water Management Plan Wells Ranch LLP Compressor Station June 10, 2015 5.0 Final stabilization and long-term storm water management As soon as practicable after construction activities have been completed in a disturbed area, final reclamation will be started to prevent further erosion of soil from that area. All disturbed areas (except for those portions covered by gravel, pavement or a structure) will be stabilized with an applicable permanent control measure. The most common control measure used to achieve final stabilization is revegetation through the process of seeding (see Section 5.1 ). However, surface roughening, mulching, surfacing with gravel or slash, and/or other methods may be used in addition to, or in some cases in place of, revegetation. Structural controls (such as water bars, berms, and diversions) may be revegetated and used as permanent measures to control pollutants in storm water discharges that will occur after construction operations have been completed. Final stabilization means that all ground surface disturbing activities at the site have been completed, and 1 All disturbed areas have been either built on, graveled or paved, or 2 A uniform vegetative cover has been established with an individual plant density of at least 70 percent of pre-disturbance levels, or 3 Equivalent permanent, physical erosion reduction methods have been employed (i.e., site has been graded and stabilized with gravel), or 4 On crop land, the control of the land has been returned to the landowner. Coverage under the Storm Water Construction Permit may be inactivated for the entire site or a portion/section of that site when the area has attained final stabilization and all temporary erosion and sediment control measures associated with that area have been removed. The site will be considered finally stabilized when final reclamation is complete and when the above final stabilization criteria have been met. 5.1 Seed Mix All disturbed areas to be revegetated are to be seeded in accordance with ROW agreements with land owners and/or specified soil erosion and sediment control practices. All non-wetland areas affected by construction activities and designated for revegetation will be seeded immediately following the completion of earth moving activities. Seed will be broadcast on steep slopes, drilled on irrigated land, and/or mulched and crimped. Fertilizer will only be applied at the landowner's request. If a landowner-specified seed mix is not provided, the following seed mix from the U.S. Department of Agriculture Natural Resource Conservation Service in Greeley may be used: Species lbs/acre PLS Western Wheatgrass 1 .6 Sand Dropseed 0.1 Indian Ricegrass 1 .8 Sand bluestem 3.2 Switchgrass 0.8 Pure Live Seed (PLS) formula: % of purity of seed mixture x % germination of seed mixture = portion of seed mixture that is PLS 17 DCP Midstream Storm Water Management Plan Wells Ranch LLP Compressor Station June 10, 2015 6.0 Inspection and maintenance The DCP Construction Project Manager will ensure that all storm water management controls are constructed or applied in accordance with governing specifications or good engineering practices. Experienced teams will be used for construction. A first inspection will occur upon installation of the controls. In addition, all workers on the site will be trained as to the location and use of the controls, especially those controls that will be disturbed as construction proceeds across the site. All training records will be maintained at the Weld County office in Greeley, CO. The goal is to minimize the potential for inadvertent removal or disturbance of BMPs and to prevent the off-site transport of sediment and other pollutants. 6. 1 Inspection schedule Minimum Inspection Schedule. The minimum inspection schedule applies to those sites under active construction, which includes the period from when the ground is initially disturbed to when construction activity is completed, and also includes the preparation of areas that will be revegetated for interim reclamation. During the Active Site period, a thorough inspection of the site storm water management system (which includes all utilized BMPs) must be conducted at least every 14 calendar days. Also, post- storm event inspections must be conducted within 24 hours after the end of any precipitation or snowmelt event that causes surface erosion. There are three exceptions to the minimum inspection schedule: post-storm event inspections at temporarily idle sites, inspections at completed sites, and inspections during certain winter conditions. Any use of an exception is temporary, and does not eliminate the requirement to perform routine maintenance due to the effects of a storm event or other conditions that may impact BMP performance, including maintaining vehicle tracking controls and removing sediment from impervious areas. Inspections, as described above, are required at all other times. Post-Storm Event Inspections at Temporarily Idle Sites. Temporarily idle sites are those where there are no construction activities occurring following a storm event. At such sites, post-storm event inspections must be conducted prior to restarting construction activities at the site, but no later than 72 hours following the storm event, and the delay must be noted in the inspection report. Routine inspections still must be conducted at least every 14 calendar days. Completed Sites. Once construction is completed and the site has been prepared for final stabilization (including completion of appropriate soil preparation, amendments and stabilization practices), the site (or portion of the site) is considered a Completed Site (for purposes of the storm water permit). Note: Only construction activities that result in a disturbance of the ground surface must be completed. Construction activities that can be conducted without disturbance of the ground surface, such as certain well completion activities, would not prohibit a site from otherwise qualifying as a Completed Site. (Completed Sites still require permit coverage until the final stabilization criteria have been met.) Completed Sites qualify for a reduced inspection schedule, as the potential for pollution is reduced if the site has been adequately prepared and/or seeded. However, because slopes and other disturbed areas are not vegetated, erosion in these areas still occurs which requires maintenance activities such as regrading and seeding of problem areas. As such, inspections must continue in order to address these situations. During the Completed Site period, a thorough inspection of the site storm water management system (which includes all utilized BMPs) is required at least once every month. The SWMP must be amended to indicate those areas that will be inspected at this reduced frequency. 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, and melting conditions posing a risk of soil erosion do not exist. This temporary exclusion is applicable only during the 18 DCP Midstream Storm Water Management Plan Wells Ranch LLP Compressor Station June 10, 2015 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. Inspection records must document the following information when this exclusion is used: dates when snow cover occurred, date when construction activities ceased, and date melting conditions began. Once final stabilization has occurred (see Section 5.0), inspections will no longer be necessary. 6.2 Inspection Procedures Inspections will be conducted by qualified personnel on the following areas: • All BMP measures identified in this document • All vegetated areas until 70% of pre-disturbance vegetation levels are reached • Construction site perimeter and discharge points • All disturbed areas • Locations where vehicles enter or exit the site • Areas used for storage of materials/wastes that are exposed to precipitation • Other areas determined to have a significant potential for storm water pollution These areas will be inspected to determine if there is evidence of, or the potential for, pollutants leaving the construction site boundaries, entering the storm water drainage system, or discharging to state waters- AU BMPs will be evaluated to determine if they still meet the design and operational criteria in the SWMP and if they continue to adequately control pollutants at the site. Any BMPs not operating in accordance with Appendix B of this SWMP will be addressed as soon as possible, immediately in most cases, to minimize the discharge of pollutants. If modifications to the SWMP are deemed necessary, the SWMP will be revised as soon as practicable, but in no case more than 72 hours after the change(s) in BMP installation and/or implementation occurs at the site. 6.3 BMP maintenance and replacement of failed BMPs Maintenance activities will ensure that all control measures are functioning at optimum levels and that all procedures and techniques will be in proper working order during a runoff event or spill condition. Any maintenance, repairs, or replacements deemed necessary after required inspections will be corrected as soon as possible (if not immediately) to minimize the discharge of pollutants. All maintenance activities will be noted on the inspection and maintenance report form, as discussed in the next section. Maintenance will include, but is not limited to: • Pickup or otherwise prevention of litter, construction debris, and construction chemicals from becoming a pollutant source prior to anticipated storm events • Removal of sediment from silt fences, sediment traps, and other sediment controls • Reseeding of any bare spots where vegetation has failed to establish • Repairs and/or adjustments to any erosion and sediment control that is deteriorating or found to be performing inadequately • Installation of additional erosion and sediment controls if needed to adequately manage the pollutant sources at the site Detailed maintenance requirements for each BMP are identified in Appendix B. 19 DCP Midstream Storm Water Management Plan Wells Ranch LLP Compressor Station June 10, 2015 6.4 Recordkeeping and inspection documentation The permittee must document inspection results and maintain a record of the results for a period of three years following expiration or inactivation of permit coverage. A typical inspection and maintenance report form is shown in Appendix C. Inspection reports will include the following: • Date of inspection, name of inspector, and title of inspector • Reason for the inspection (active, completed, post-storm event, etc.) and areas inspected (site name and portion(s) of the site inspected) • Vegetation observations, if necessary, including the percent pre-disturbance vegetation and whether or not vegetation growth has reached 70% of pre-disturbance levels • Erosion and sediment control observations, including any required actions and dates performed • Other site observations, including any required actions and dates performed • Additional comments such as: - Location(s) of discharges of sediment or other pollutants from the site - Location(s) of BMPs that need to be maintained - Location(s) of BMPs that failed to operate as designed or proved inadequate for a particular location - Location(s) where additional BMPs are needed that were not in place at the time of inspection - Measure(s) taken to prevent future violations - Changes necessary to the SWMP and date performed After adequate measures to correct any problems have been taken and recorded, or where a report does not identify any incidents of non-compliance, the report will contain a signed certification indicating the site is in compliance with the permit to the best of the signer's knowledge and belief. In addition to the above inspection report, all spills, leaks, or overflows will be recorded and tracked in the DCP Asset Management System (AMS). 20 DCP Midstream Storm Water Management Plan Wells Ranch LLP Compressor Station June 10, 2015 7.0 Plan revisions and retention The SWMP will be amended whenever there is a change in design, construction, operation, or maintenance, which may impact the potential for surface water runoff pollution. Examples include, but are not limited to, removal of BMPs, identification of new potential pollutant sources, addition of BMPs, modification of BMP installation/implementation specifications or maintenance procedures, and changes to the site map. These SWMP changes shall be made prior to changes in the site conditions except for responsive SWMP changes. Responsive changes shall be made immediately after changes are made in the field or 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 that require development of materials to modify the SWMP. At a minimum, the SWMP will be updated annually. During construction, a copy of the SWMP and all inspection reports will be retained at the construction field office. Following construction the SWMP and inspection records will be maintained at the Greeley Field Office. These documents will be retained for a period of three years following final stabilization of the site. These reports will be made available to the WQCD or Environmental Protection Agency (EPA) upon request and at the time of inspection. 21 DCP Midstream Storm Water Management Plan Wells Ranch LLP Compressor Station June 10, 2015 8.0 Inactivation notice When all disturbed areas associated with the Storm Water Construction Permit have reached "final stabilization" (as described in Section 5.0), all temporary erosion and sediment control measures have been removed, and all components of the SWMP are complete, the area no longer requires coverage under the permit terms. At that time, DCP Midstream will submit an Inactivation Notice that closes this permit to the WQCD. A blank copy of this form is included in Appendix D of this document. Upon receipt of the Inactivation Notice, the WQCD will provide written confirmation that coverage under this permit has been terminated. This historical documentation will be maintained on site for a period of at least three years following termination of permit coverage. 22 STATE OF COLORADO For Agency Use Only COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT Permit Number Assigned Dedicated to protecting and improving the health and environment of the people of Colorado ,1/4. 9 .CPA- /; CORU3 T Water Quality Control Division "' "; J Date Received / /_ 4300 Cherry Creek Drive South ':. Cq t;' WQCD-WQPS-B2 ' ` Saa' ":. Denver, CO 80246-1530 1876 (303) 692- 3500 www.coloradowaterpermits.corn COLORADO DISCHARGE PERMIT SYSTEM (CDPS) STORMWATER DISCHARGE ASSOCIATED WITH CONSTRUCTION ACTIVITIES APPLICATION PHOTO COPIES, FAXED COPIES, PDF COPIES OR EMAILS WILL NOT BE ACCEPTED. Please print or type, Original signatures are required. All items must be completed accurately and in their entirety for the application to be deemed complete. Incomplete applications will not be processed until all information is received which will ultimately delay the issuance of a permit. If more space is required to answer any question, please attach additional sheets to the application form. Applications must be submitted by mail or hand delivered to: Colorado Department of Public Health and Environment Water Quality Control Division 43O0 Cherry Creek Drive South WQCD-WQPS-B2 Denver, CO 80246-1530 Any additional information that you would like the Division to consider in developing the permit should be provided with the application. Examples include effluent data and/or modeling and planned pollutant removal strategies. HOW TO COMPLETE THIS APPLICATION 1. Online via web browser. You must use Internet Explorer (version 8 and above). All other browsers disable the electronic submission features. OR 2. Download and save this form to your computer. Then open Adobe Reader (or Acrobat), select File, then Open and navigate to where the form is saved. This is the best option if using a Mac computer (Do not use the Mac Preview program). PERMIT INFORMATION Reason for Application: NEW CERT ■ RENEW CERT EXISTING CERT# Applicant is: I Property Owner Contractor/Operator A. CONTACT INFORMATION—NOT ALL CONTACTS MAY APPLY indicates required * PERMITTEE (if more than one please add additional /pages) * ORGANIZATION FORMAL NAME: DC. ? M t Ct s A- r e Ct., vv1 1) * PERMITTEE CONTACT the person authorized to sign and certify the permit application. This person receives all permit correspondences and is the person re ponsible for ensuring compliance with the permit. Responsible Person (Title): VAC e Pr e $ t ck e v� Currently Held By (Person): FirstName: W •I ,\ S IAA LastName: Z h V\ 5 O Telephone: 110 '318' 6395 Email Address: w t 3 ohyt so rt 2 e d L 1M ; Q s 4- re at a c o NY1 Oi anization: DC PV as3 ream ,-,j Mailing Address: J so a b t4 q C.ko t City: G. c e el e Mate: C. LJ 2ip Code: 8 o 6 31 Y This form must be signed by the Permittee (listed in item 1) to be considered complete. Per Regulation 61 In all cases, it shall be signed as follows: In the case of corporations, by a responsible corporate officer. For the purposes of this section, the responsible corporate officer is responsible for the overall operation of the facility from which the discharge described in the application originates. In the case of a partnership, by a general partner. In the case of a sole proprietorship, by the proprietor. In the case of a municipal, state, or other public facility, by either a principal executive officer or ranking elected official. SW Consvucucn 4WD:anon for page 2 of 5 2) DMR COGNIZANT OFFICIAL (i.e. authorized agent) the person or position authorized to sign and certify reports required by the Division including Discharge Monitoring Reports *DMR's, Annual Reports, Compliance Schedule submittals, and other information requested by the Division. The Division will transmit pre-printed reports (ie. DMR's) to this person. If more than one, please add additional pages. l'ame as 1) Permittee Responsible Person (Title): Currently Held By (Person): FirstName: LastName: Telephone: Email Address: Organization: Mailing Address: City: State: C° Zip Code: Per Regulation 61 : All reports required by permits, and other information requested by the Division shall be signed by the permittee or by a duly authorized representative of that person. A person is a duly authorized representative only if: i. The authorization is made in writing by the permittee. ii. The authorization specifies either an individual or a position having responsibility for the overall operation of the regulated facility or activity such as the position of plant manager, operator of a well or a well field, superintendent, position of equivalent responsibility, or an individual or position having overall responsibility for environmental matters for the company. (A duly authorized representative may thus be either a named individual or any individual occupying a named position); and iii. The written authorization is submitted to the Division. 3) *SITE CONTACT local contact for questions relating to the facility & discharge authorized by this permit IISame as 1) Permittee Responsible Person (Title): CO w't \ '10.'C Si p er v t s a 1- Currently Held By (Person): FirstName: ��a Al Le �,.,J LastName: 1r l G�J �' l e Telephone: cO �� $ Z�C-7 Email Address: YY1 t G eli—fle a G W1 t c S+ r ea WI , C O YY\ Ak' COe, r 9 1P Organization: � � aY1� Mailing Address: 302 ID 9 ik Phi ewe °C City: Cie e e Vet State: CO Zip Code: e o 6 3 l 1 4) BILLSNG CONTACT if different than the permittee. ' Same as 1) Permittee Responsible Person (Title): Currently Held By (Person): FirstName: LastName: Telephone: Email Address: Organization: Mailing Address: City: State: CO Zip Code: al% Ccnsvu;0on Appt cauen Li : pege nr 5) OTHER CONTACT TYPES (check below) Add pages if necessary: Responsible Person (Title): Currently Held By (Person): LastName: Telephone: Email Address: Organization: Mailing Address: City: State: Zip Code: IPretreatment Coordinator II Property Owner u Compliance Contact IEnvironmental Contact IInspection Facility Contact I Stormwater MS4 Responsible Person i l Biosolids Responsible Party II Consultant ' I Stormwater Authorized Representative 71 Other: B) PERMITTED PROJECT/FACILITY' INFORMATION _ Project/Facility Name W °LRciA4c1��, Svl P C O w't to SS o r S+t�,- t oV�, . P Street Addressor Cross Streets . ),. W ; I e f e 4 $+ d -E c R 41 4 0 . S n ; I e SC u- % O4 C R, 6 8 (e.g., "S. of Park St. between 5th Ave. and 10th Ave.", or "W. side of C.R. 21, 3.25 miles N. of Hwy 10"; A street name without an address, intersection, mile marker, or other identifying information describing the location of the project is not adequate. For linear projects, the route of the project should be described as best as possible with the location more accurately indicated by a map.) City: l ` Zip Code: 8 o629 2 1 County: w e , a Facility Latitude/Longitude - (approximate center of site to nearest 15 seconds using one of the following formats) 11 Decimal Degrees OR 001A Latitude 001A Longitude (e.g., 39.703°, 104.933°) Degrees_ (to 3 decimal places) Degrees (to 3 decimal places) , Minutes,Degrees 001A Latitude 110 ° 28 - I B . 001A Longitude toil ° 21. 11 1 - e.g., 39°46`11"N, 104°53'11"W Degrees Minutes Seconds Degrees Minutes Seconds For the approximate center point of the property, to the nearest 15 seconds. The latitude and longitude must be provided as either degrees, minutes, and seconds, or in decimal degrees with three decimal places. This information may be obtained from a variety of sources, including: • Surveyors or engineers for the project should have, or be able to calculate, this information. • EPA maintains a web-based siting tool as part of their Toxic Release inventory program that uses interactive maps and aerial pho- tography to help users get latitude and longitude. The siting tool can be accessed at www.epagov/triireportifsiting_toolfinclex.htm • U.S. Geological Survey topographical map(s), available at area map stores. • Using a Global Positioning System (GPS) unit to obtain a direct reading. Note: the latitude/longitude required above is not the directional degrees, minutes, and seconds provided on a site legal description to define property boundaries. C) MAP (Attachment) If no map is submitted, the permit will not be issued Facility Information Map: Attach a map that indicates the site location and that CLEARLY shows the boundaries of the area that will be disturbed. Maps must be no larger than 11x17 inches. 0) LEGAL DESCRIPTION Legal description: If subdivided, provide the legal description below, or indicate that it is not applicable (do not supply Township/Range/Section or metes and bounds description of site) Subdivision(s): Lot(s): Bloo.(si OR Not applicable (sire has not been subdivided) StV Ccmtru tionA plicaLim for page 3 of S E) AREA OF CONSTRUCTION SITE Total area of project site )O Act S Area of project site to undergo disturbance O qC YTS Note: aside from clearing, grading and excavation activities, disturbed areas also include areas receiving overburden (e.g., stockpiles), demolition areas, and areas with heavy equipment/vehicle traffic and storage that disturb existing vegetative cover Total disturbed area of Larger Common Plan of Development or Sale. If applicable: (i.e., total, including all phases, filings, lots, and infrastructure not covered by this application) Provide both the total area of the construction site, and the area that will undergo disturbance, in acres. Note: aside from clearing, grading and excavation activities, disturbed areas also include areas receiving overburden (e.g., stockpiles), demolition areas, and areas with heavy equipment/vehicle traffic and storage that disturb existing vegetative cover (see construction activity description under the APPLICABILITY section on page 1). If the project is part of a larger common plan of development or sale (see the definition under the APPLICABILITY section on page 1), the disturbed area of the total plan must also he included. F) NATURE OF CONSTRUCTION ACTIVITY Check the appropriate box(s) or provide a brief description that indicates the general nature of the construction activities. (The full description of activities must be included in the Stormwater Management Plan.) Single Family Residential Development nMulti-Family Residential Development 1 1 Commercial Development OH and Gas Production and/or Exploration (including pad sites and associated infrastructure) Highway/Road Development (not including roadways associated with commercial or residential development) Other—Description: G) ANTICIPATED CONSTRUCTION SCHEDULE 1 Construction Start Date: Se. rfey-Nicke r 2 0 t , Final Stabilization Date: M a re\n 1 Z O 1 1 • Construction Start Date - This is the day you expect to begin ground disturbing activities, including grubbing, stockpiling, excavating, demolition, and grading activities. • Final Stabilization Date - in terms of permit coverage, this is when the site is finally stabilized, This means that all ground surface disturbing activities at the site have been completed, and all disturbed areas have been either built on, paved, or a uniform vegetative cover has been established with an individual plant density of at least 70 percent of pre-disturbance levels. Permit coverage must be maintained until the site is finally stabilized. Even if you are only doing one part of the project, the estimated final stabilization date must be for the overall project. If permit coverage is still required once your part is completed, the permit certification may be transferred or reassigned to a new responsible entity(s). H) RECEIVING WATERS (If discharge is to a ditch or storm sewer, include the name of the ultimate receiving waters) Immediate Receiving Water(s): Crow C r e tk Ultimate Receiving Water(s); .SC t n\ PI . e e. Rive Y' Identify the receiving water of the stormwater from your site. Receiving waters are any waters of the State of Colorado. This includes all water courses, even if they are usually dry. If stormwater from the construction site enters a ditch or storm sewer system, identify that system and indicate the ultimate receiving water for the ditch or storm sewer. Note: a stormwater discharge permit does not allow a discharge into a ditch or storm sewer system without the approval of the owner/ operator of that system. 5'.ti' C^nctruo:01; Applicauer, for rage , of 5 I) SIGNATURE PAGE 1. You may print and sign this document and mail the hard copy to the State along with required documents. OR 2, Electronic Submission Signature You may choose to submit your application electronically, along with required attachments. To do so, click the SUBMIT button below which will direct you, via e-mail , to sign the document electronically using the DocuSign Electronic Signature process. Once complete, you will receive, again via e-mail, an electronically stamped Adobe pdf of this application. Print the signature page from the electronically stamped pdf, sign it and mail it to the WO,CD Permits Section to complete the application process (address is on page 1 of the application). • The Division encourages use of the electronic submission of the application and electronic signature, This method meets signature requirements as required by the State of Colorado. • The ink signed copy of the electronically stamped pdf signature page is also required. This requirement meets Federal EPA Requirements. Processing of the application will begin with the receipt of the valid electronic signature. STORMWATER MANAGEMENT PLAN CERTIFICATION "i certify under penalty of law that a complete Stormwater Management Plan, as described in Appendix B of this application, has been prepared for my activity. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the Stormwater Management Plan is, to the best of my knowledge and belief, ₹rue, accurate, and complete. I am aware that there are significant penalties for falsely certifying the completion of said SWMP, including the possibility of fine and imprisonment for knowing violations." "I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is to the best of my knowledge and belief, true, accurate and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." "I understand that submittal of this application is for coverage under the State of Colorado General Permit for Stormwater Discharges Associated with Construction Activity for the entirety of the construction site/project described and applied for, until such time as the application is amended or the certification is transferred, inactivated, or expired." [Reg 61.4(1)(h)] Electronic Signature Ink Signature Date: 6 ' S Signature of Legally Responsible Person or Authorized Agent (submission must e original signature) Lai %Lk ct- TO vitSov1 i C 6 fresidevc\ Name (printed) Title This form must be signed by the Permittee to be considered complete. Per Regulation 61 In all cases, it shall be signed as follows: a) In the case of corporations, by a responsible corporate officer. For the purposes of this section, the responsible corporate officer is responsible for the over all operation of the facility from which the discharge described in the application originates. b) In the case of a partnership, by a general partner. c) In the case of a sole proprietorship, by the proprietor. d) In the case of a municipal, state, or other public facility, by either a principal executive officer or ranking elected official 3rd Party Preparer: If this form was prepared by an authorized agent on behalf of the Permittee, please complete the fields below. T v 1 Palk d ar- k 0 ACMA. c STf eant, Copr\ Pi eparer Name (printed) Email Add4ss DO NOT INCLUDE A COPY OF THE STORMWATER MANAGEMENT PLAN DO NOT INCLUDE PAYMENT-AN INVOICE WILL BE SENT AFTER THE CERTIFICATION iS ISSUED. 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L9 . aM L9 NOM _b , 3 • lir � . ,f - a II s - tt B'-- r ,.C ti i/ 1 ' • ( sit Irit .. `s. • ' ' \ r. ti , J . li .`` F 1 I ' ♦ r . • I ; laat �.: _ -,~ vt... - _ . 14> ,�77—..... r / ,• - N En .its ic,:c. ea, w I ya ' p h X 0 N a f r = r {• V�" ;4, O .""le- - O:NH • , Y a ,. .rl - ..- ,� . i Tip •r . • r ;O_ ` P - — r `• ` - ' • k ."7 ' , 1� . �. �t �T 9 • ) 1 _ L 7 • 11. , N :I_ _ Meat „ . la Ill t ,+ ,• - • _ it �• • -, � � • 1. . - _ ..r.. . •r ' ' ' 1 • Nili • .� r , . - - libraa.. Ill j _s � ' �' 1 r _ :,c • IT •et { l , . -) soh T . . 3E DCP Midstream Storm Water Management Plan Wells Ranch LLP Compressor Station June 10, 2015 9.0 Signature "I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted, to the best of my knowledge and belief, is true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment or knowing violations." kal av►t 3cLvsovr 1e.. f� s ccke lA± Printed name Title -l- Su Ae \ & " 101G Signature Date 23 DCP Midstream Storm Water Management Plan Welts Ranch LLP Compressor Station June 10, 2015 Appendix B USR Plans including Erosion and Sediment Control BM Ps DCP Midstream Storm Water Management Plan Wells Ranch LLP Compressor Station June 10, 2015 Appendix C Inspection and Maintenance Report Form OCP Midstream inspection and Maintenance Report Form Date: Name of Inspector. Title of inspector_ Area(s) Inspected: Type of Inspection: LI Active ❑ Preconst uction O Construction o 14 days since last inspection ❑ Within 24 hours of a rairt snowmett event that causes surface erosion Q Within 72 hours of a raintsnowmelt event that causes surface erosion (for tempura rilyudle sites) ❑ Completed (1 month since last inspection) O Interim Reclamation O Final Reclamation Ci Sustained Snow Cover © Preconstrudion ❑ Construction O Interim Reclamation D Final Reclamation Date snow occurred: Date construction ceased: _ Date melting began:a. Vegetation Observations Site Revogetated: Yes 0 No O , _ Pre-disturbance Vegetation: % (estimate from undisturbed surrounding areas) Vegetation Growth uniform and at least 70% of pre-disturbance levels: Yes ❑ No O Comments and/or Required Action & Date Performed: Erosion and Sediment Control Observations Erosion/Sediment Control: Comments and/or Required Action & Date Performed: ,All other erosion and sediment controls in compliance with permit? Yes O N/A (no other controls am used) O Other Site Observations LocationlObservatiion: Comments and/or Required Action & Date Performed: Site perimeter/discharge points inspected? Yes a No ❑ N/A o All disturbed areas inspected? _ Yes o No o N/A n Vehicles entrances)/exit(s) inspected? Yes o No o N/A o Material storage areas inspected? Yes n No ❑ N/A ❑ Acceptable waste management procedures? Yes o No ❑ NIA c Acceptable vehicle/equipment maintenance? Yes o No 0 N/A o Acceptable control of dust? Yes o No ❑ N/A E3 Any sediment/pollutant discharged off-site? Yes o No o N/A ❑ lNasio management includes add waste, ha ardam waste, contaminated sod, concrete washout, modes sanitary waste, etc Ardditiiortal COntnlentl,e: (New BMPe installed at mire site, measures taken to prevent future vioist}ons. charges required to the SWMP and dale perfurmed, etc...) Signature certifying that the site is in compliance (after all necessary repairs, maintenance, and changes have been made): Printed Name Signature Dale DCP Midstream Storm Water Management Plan Wells Ranch LLP Compressor Station June 10, 2015 Appendix D Inactivation Form STATE OF OLOFADO Dedicated ₹o protecting and improving ₹hr; heaiih and environment of ₹h2 oEople ot Co'drat]o eat 1 i 4300 Cherry Creek Dr. S Denver. Colorado 80246-1530 �.t87G • i Phone (303) 692-2000 TDD Line (303) 691-7700 Colorado Department Located in Glendale. Colorado s PublicHIealt:h htlorlh rwvi cciche.state.co.us and F.nv foment Colorado Water Quality Control Division Notice of Termination Construction Storrnwater Inactivation Notice www.colloradowaterpermits.com 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 Division. MAIL 0Rl ilNAL FORM VIII TI-4 IN!). IRFS TO 7141 FOLLOWING r,r.FDRESS. 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 EM/ULED FORMS WILL NOT hi A,CCEPrLos • PART A. IDENTIFICATION OF PERMIT Please write the permit certification number to be terminated Permit Certification Number (four digits, not "0000"): COR03 • PART Bz PERMITTEE INFORMATION Company Name Mailing Address City State Lip code legal Contact Name Phone number Title Email • PART C. FACILITY/PROJECT INFORMATION Facility/Project Name Location (address) City County Zip code Local Contact Name Phone number Title Email Page 1 of 2 form last revised May 2010 DCP Midstream Storm Water Management Plan Wells Ranch LLP Compressor Station June 10, 2015 COLORADO WATER QUALITY CONTROL DIVISION NOTICE OF TERMINATION www.coloradowaterpermits.com • PART D. TERMINATION VALIDATION CRITERIA One of the criteria (1,2, or 3) 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. ❑ 1: FINALLY STABILIZED OR CONSTRUCTION NOT STARTED - The permitted activities covered under the certification listed in Part A meet the requirements for FINAL STABILIZATION in accordance with the permit, the Stormwater Management Man, and as described below. This criterion should also be selected if construction was never started and no land was disturbed, and an explanation of this condition provided in the description below. Final stabilization is reached when: all ground surface disturbing activities at the site have been completed including removal of all temporary erosion and sediment control measure, and uniform vegetative cover has been established with an individual plant density of at least 70 percent of predisturbance levels, or equivalent permanent, physical erosion reduction methods have been employed. REQUIRED - Describe the methods used to meet the final stabilization c described above (include additional pages if necessary) O 2: ALTERNATIVE PERMIT COVERAGE OR FULL REASSIGNMENT - Ail ongoing construction activities, including all disturbed areas, covered under the permit certification listed in Part A have coverage under a separate CDPS stormwater construction permit, including the permit certification issued when Division's Reassignment Form was used by the permittee to reassign all areas/activities. REQUIRED -- Provide the permit certification number covering the ongoing activities: COR03 3: PERMITTEE IS NO LONGER THE OWNER/OPERATOR of the site and all efforts have been made to transfer the permit to appropriate parties. Please attach copies of registered mail receipt, letters, etc. One of the three criteria above MUST BE CHECKED and the required information for that criterion I STOP ! provided, or this form will not be processed and the permit will remain active. • PART E. CERTIFICATION SIGNATURE (Required for all Termination Requests) I understand that by submitting this notice of inactivation, I am no longer authorized to discharge stormwater associated with construction activity by the general permit. I understand that discharging pollutants in stormwater associated with construction activities to the waters of the State of Colorado, where such discharges are not authorized by a CDPS permit, is unlawful under the Colorado Water Quality Control Act and the Clean Water Act. I certify under penalty of law that I have personally examined and am familiar with the information submitted herein, and based on my inquiry of those individuals immediately responsible for obtaining the information, I believe that the information is true, accurate and complete. I am aware that there are significant penalties for submitting false information, 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 duly authorized representative of the permittee named in Part B. Signature of Legally Responsible Party Date Signed Name (printed) - ---------- ---- - Title Signatory requirements: This form shalt be signed, dated, and certified for accuracy by the permlttee In accordance with the following criteria: 1. In the case of a corporation, by a principal executive officer of at least the level of vice-president, or his or her duly authorized representative, if such representative is responsible for the overall operation of the operation from which the discharge 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 operation, by wither a principal executive officer, ranking elected official, or other duly authorized employee. Page 2 of 2 form last revised May 2010 Hello