The URL can be used to link to this page

Browse Search

Home My WebLink About20252876.tiffUse by Special Review (USR) Application Planning Department Use: Date Received: Amount $ Case # Assigned: Application Received By: Planner Assigned: P roperty Information Is the property currently in violation? cx No / ■ Yes Violation Case Number: Parcel Number: 1 2 1 7. 2 8. 0. 0 0. 0 0 3 S ite Address: N/A Legal Description: 7371-A SW4 28 3 63 Section: 28 , Township 3 N, Range 63 W Zoning District:Agricultural Acreage: 160 Within subdivision or townsite? No / ■ Yes Name: Water (well permit # or water district tap #): N/A (bottled) Sewer (On -site wastewater treatment system permit # or sewer account #): N/A (portable toilets) Floodplain CR No / • Yes Geological Hazard El No / • Yes Airport Overlay Ex7 No / • Yes P roject U SR Use being applied for: Proposed natural gas compressor site N ame of proposed business: DCP Operating Company, LP P roperty Owner(s) (Attach additional sheets if necessary.) N ame: Art Guttersen Company: Guttersen Ranches LLC Phone #: 970-396-7777 Email: artguttersen@icloud.com Street Address: PO Box 337090 City/State/Zip Code: Greeley/CO/80633 APPLICANT/AUTHORIZED AGENT (Authorization Form must be included if there is an Authorized Agent) N ame: Joel Sparks Company: DCP Operating Company LP Phone #: q7n-5n2.,9733 Email: joel.sparks@p66.com Street Address: 3026 4th Avenue City/State/Zip Code: Greeley/CO/80631 I (We) hereby depose and state under 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. All fee owners of the property must sign this application, or if an Authorized Agent signs, an Authorization Form signed by all fee owners must be included with the application. If the fee owner is a corporation, evidence must be included indicating the signatory has the legal authority to sign for the corporation. 6-2-25 S nature Date Signature Date Joel Sparks Print Print Departments of Planning Building, Development Review and Environmental Health 1402 N 17TH Avenue P Box 758 Greeley, CO 80632 Authorization Form i Guttersen Ranches LL to DCP Operating Company LP (We), geve permission (Owner - please print) (Authorized AgentlApplicant-please print) to apply for any Planning, Building, Access, Grading or OWTS permits on our behalf, for the property located at (address or parcel number) below: Vacant land - Parcel # 121728000003 Legal Description: P W/4 9 p Subdivision Name of Section 28 Township , NRange 63 Vv Property Owners Information: Address: PO Box 337090 - Greeley, CO 80633 Lot Block phone: 970-396-7777 E-mail: artguttersen@icloud.com Authorized Agent/Applicant Contact Information: Address: Joel Sparks, PM - 3026 4th Avenue, Greeley, CO 80631 Phone: 97 -'02 -97330 E -Mail: joetsparks@p665com Correspondence to be sent to: Owner Additional Into. Authorized Agent/Applicant b : Mail - Y Email X I (We) hereby 'E rtify, under penalty of perjury and after carefully reading the entire contents of this docur �� nt, th Owr' r i..nature e ',formation stated above is true and correct to the best of my (our) knowledge. Date g Subscribed and sworn to before me this My commission expires 2.5 Owner Signature Date Ztdayof Mcyc,in . 20 by l Public aA Nofar liabalhalbasahrilas a a a ALYSSA CORINNE SCHAFER-CAIPOS NOTARY PUBLIC - STATE OF COLORADO NOTARY ID 20244004079 MY COMMISSION EXPIRES JAN 30, 2028 JUN -09-97 14:04 FROM:WOBB ID -9703S23166 PAGE 2/3 ARTICLES OF ORGANIZATION for GUTTERSEN RANCHES LLC THE UNDERSIGNED natural person of at least 18 years of age. acting as organizer, hereby forms a limited liability company ("Company") by virtue of the Colorado Limited Liability Company Act, as amended., and adopts the following Articles of Organi liability company. I . Name. The name of the Company is Guttersen Ranch swrh limited LU7t (LJ 50.00 rTARY Or STAIf, �. 5i-27 (t£}�LI,�},Q 59JeljIA: �1ui� ! 2. Place of siness. The principal place of business of the Company is 13696 Weld County Road 74, Eaton. CO 80615_ 3_ Duratime The Company shall dissolve fifty (50) years from its date of organiza- tion unless these Articles are amended to extend its existence or unless earlier dissolved pursuant to the operating agreement of the Company or otherwise by law. 4. ,Registered Agent. The registered agent of the Company in Colorado is Mike Guttersen. 13696 Weld County Road 74, Eaton, CO 80615_ 5. Management o man . The management of the Company shall be vested in the managers of the Company. The name and business address of the initial manager who shall serve as manager or until his successor is elected and qualified is Mike Guttersen, 13696 Weld County Road 74, Eaton, CO 80615. 6. Purposes. The limited liability company is organized for any legal and lawful purposes pursuant to the Colorado Limited Liability Company Act, as amended_ 7_ Indemnification. The limited liability company shall indemnify its organizer, managers, agents and employees against claims or liabilities in any way related to his or her capacity or status as organizer, manager, agent or employee, to the maximum extent permitted by law. 8. Organizer. The name and address of the Organizer of the Company is Mike Guttersen, 13 696 Weld County Road 74, Eaton.. CO 80615. Dated: ike Guttersen, Organizer Eft is l OFFICE OF THE SECRETARY OF STATE OF THE STATE OF COLORADO CERTIFICATE OF FACT OF GOOD STANDING I, Jena Griswold, as the Secretary of State of the State of Colorado, hereby certify that, according to the records of this office, GUTTERSEN RANCHES LLC is a Limited Liability Company formed or registered on 06/09/1997 under the law of Colorado, has complied with all applicable requirements of this office, and is in good standing with this office. This entity has been assigned entity identification number 19971091720 . This certificate reflects facts established or disclosed by documents delivered to this office on paper through 04/02/2025 that have been posted, and by documents delivered to this office electronically through 04/03/2025 a 14:45:44 . I have affixed hereto the Great Seal of the State of Colorado and duly generated, executed, and issued this official certificate at Denver, Colorado on 04/03/2025 c�, 14:45:44 in accordance with applicable law. This certificate is assigned Confirmation Number 17170025 . Secretary of State of the State of Colorado *********************************************End of Certificate******************************************* Notice: A certificate issued electronically from the Colorado Secretary of State's website is fully and immediately valid and effective. However, as an option, the issuance and validity of a certificate obtained electronically may be established by visiting the Validate a Certificate page of the Secretary of State's website, https://www.coloradosos.gov/biz/CertificateSearchCriteria.do entering the certificate's confirmation number displayed on the certificate, and following the instructions displayed Confirming the issuance of a certificate is merely optional and is not necessaiy to the valid and effective issuance of a certificate. For more information, visit our website, https://www.coloradosos.gov click "Businesses, trademarks, trade names" and select "Frequently Asked Questions." 4i7201 12/21/2021 = A .24 PM ©totai Pages: 1 Rec I e: $13.00% 9 Carly Koppes - C and Recorder, Wel. e unty , CO o C� 1. is Statement of Authority COL A O LIMITED LIABI The type of entity is . corporation nonprofit ation limited ' ity company • Mana Membership • li partnership ot a STATEOF AUTHORITY n 38-30-i72, C.R.S.) tes to an entity named GU COMPANY. \ERSEN RANCHES LLck Bred limited liability pa > - 1 gistered limited liability �_ limited partnership asso - government or gove I trust (Section 38-3 �z//'ip d partnership n tal subdivision or agenc 5, C.R.S.} 3. �o�'he entity is formed un The mailing addr S\Iersey CO 80644. (?,, dposition of each pers "therwise affecting tit ber. 5. The na: encumberin Managin he laws of Colorado. uttersen, Managing 6. o ' he authority of the for f ng person(s) to bind t ing the manner in whi„c 1✓ Other matters con ©S all other matters. O�O 8. This Sta `�n,t of Authority is exec Section 38-3,& C.R.S. ttersen Ranches LLC o� Art Guttersen, Managi ember STATE OF CO `T`•! A DO COUNTY OF Otte- D The for ing instrument was ack Man g g Member and Shawn ness my hand and offi y commission expir % C SCHAFER-CAMPOS NOTA : BLIC - STATE OF COLORADO NOTARY ID 20154039732 d COMMISSION EXPIRES OCT 8, 3 of the entity is: c/a authorized to execute i eal property on behalf ity is not limited. O O ents conveying, e entity is: Art Gutters (2) o9 en 17506 WCR 57, 9 e entity deals with int�r�sin real property: on behalf of the entinuant to the provisions�� ledged by me this 16t rsen, Managing Memb of December, 2021, b Guttersen, O Notate Public • d p Midstream. Use by Special Review (USR) Planning Questionnaire Answer the following questions per Section 23-2-260. A, B, C & E of the Weld County Code. Please type on a separate sheet. If a question does not pertain to your proposal, please respond with an explanation — do not leave questions blank. 1. Explain the proposed use and business name. DCP Operating Company, LP ("DCP") intends to lease an approximately 35 -acre parcel to construct a 10 -acre natural gas compressor station tentatively referred to as the `Goldeneye Station'. The proposed operation includes various compression equipment that will be used to compress and transport natural gas. The equipment being proposed includes, but is not limited to, compressors, vapor recovery units, separators, dehydrators, storage tanks, and additional supporting compression equipment. Construction of the Goldeneye Station will commence once the applicable approvals are issued and will take approximately nine months to achieve mechanical completion. Vehicle traffic will increase during construction and then be reduced to one or two vehicles per day during operations. In addition to the USR from Weld County, DCP will obtain additional required federal, state, or local approvals, as applicable, for the facility. The station will operate 24 hours a day, 7 days a week, 365 days a year. 2. Explain the need for the proposed use. The Denver-Julesburg (DJ) Basin produces varying amounts of natural gas that need to be routed via a system of pipelines through a number of compressor stations in Weld County, Colorado. A compressor station helps the transportation process of natural gas from one location to another. Natural gas, while being transported through a pipeline, needs to be constantly pressurized in certain distance intervals. The gas in the Goldeneye Station will be pressurized by an electric motor driven reciprocating compressor. The proposed Goldeneye Station will be owned and operated by DCP. The Goldeneye Station is needed to support adequate and consistent line pressures for the network of nearby oil and gas collected from gathering systems and will compress the gas for delivery to pipelines for processing at existing DCP gas plants. DCP currently is negotiating a lease to purchase a 35 -acre section of land within Parcel 121728000003 where the facility will be located. 3. Describe the current and previous use of the land. The land is currently zoned agriculture used for grazing and is situated on the Guttersen Ranch. The land is surrounded by several oil and gas production sites. The future use of all areas within the 35 -acre parcel not used to construct and operate the 10 -acre natural gas compressor station will remain as grazing land. 1 ASCENT I I COLLECT • ANALYZE. DELIVER GEOSPATIAL DATA d p Midstream. 4. Describe the proximity of the proposed use to residences. There are no residences within one mile of the proposed location. 5. Describe the surrounding land uses of the site and how the proposed use is compatible with them. Surrounding land uses consist of grazing and oil and gas production. 6. Describe the hours and days of operation (i.e. Monday thru Friday 8:00 a.m. to 5:00 p.m.). The facility will operate 24 hours/day, 365 days/year. 7. Describe the number of employees including full-time, part-time and contractors. If shift work is proposed, detail number of employees, schedule and duration of shifts. One to two employees will visit the site 1-2 times/day to perform routine maintenance. No employees (full or part-time) will be working on site for any extended period except for necessary maintenance. 8. Describe the maximum number of users, patrons, members, buyers or other visitors that the site will accommodate at any one time. There will be no users, patrons, members, buyers or other visitors to the site other than DCP employees. 9. List the types and maximum numbers of animals to be on the site at any one time (for dairies, livestock confinement operations, kennels, etc.). There will be no animals on site. 10. List the types and number of operating and processing equipment. DCP intends to construct three compressors and related improvements. The proposed site plan is attached hereto as Exhibit A. 11. List the types, number and uses of the existing and proposed structures. The existing site is unimproved, agricultural land used for grazing. The Goldeneye Station will include one compressor building, which will house the three compressor stations. 12. Describe the size of any stockpile, storage or waste areas. During construction, DCP will utilize one topsoil stockpile and a temporary 37,500 sq. ft. laydown area. The 6' topsoil stockpile will be located on the northeast side of the location. After ASCENT I I COLLECT • ANALYZE • DELIVER GEOSPATIAL DATA dr-ip Midstream. construction is complete, DCP will spread out the topsoil pile evenly on location. During operation, only critical spare parts and additional safety equipment will be stored on site. The storage and use of paraffin solvents, corrosion inhibitors, and methanol may be possible. If necessary, the listed chemicals will be stored in properly labeled chemical totes with built-in secondary containment and SDS paperwork onsite. However, specific types, volumes, and locations are still under development at this time. 13. Describe the method and time schedule of removal or disposal of debris, junk and other wastes associated with the proposed use. One DCP employee will inspect the site approximately 2-3 times per week and will remove all debris or junk immediately. The liquids generated by the operations in the facility will be piped from the facility. 14. Include a timetable showing the periods of time required for the construction of the operation. Construction of the Goldeneye Station will commence once the applicable approvals are issued and will take approximately nine (9) months. 15. Describe the proposed and existing lot surface type and the square footage of each type (i.e. asphalt, gravel, landscaping, dirt, grass, buildings). Although DCP is entering into an agreement to lease the parcel, only 10 acres will be developed for the Goldeneye Station. The proposed surface of the compressor pad and access road will be approximately 2.8 acres of compacted gravel or road base material except for the various equipment and tank concrete foundations and 0.86 acres of temporary lay down area. The remaining areas will be vegetated with native grasses. 16. How many parking spaces are proposed? How many handicap -accessible parking spaces are proposed? No public parking will be on site. No public access will be allowed. 17. Describe the existing and proposed fencing and screening for the site including all parking and outdoor storage areas. Due to the remote nature of the location there is no existing fencing or screening. The facility will be fully fenced with spaced man gates along the perimeter. One truck access gate will be located on the north side adjacent to the west perimeter. 18. Describe the existing and proposed landscaping for the site. The location is currently unimproved grazing land. No landscaping is required or planned. 19. Describe reclamation procedures to be employed as stages of the operation are 3 ASCENT I I COLLECT • ANALYZE • DELIVER GEOSPATIAL DATA Crep Midstream. phased out or upon cessation of the Use by Special Review activity. Upon successful completion of construction, disturbed soil areas outside of the facility will be seeded with native grasses to support vegetation growth, soil stabilization and to prevent erosion. At final reclamation, all equipment will be removed from the site, all underground lines removed, and the soil will be reclaimed back to original grade. All site reclamation will be in conformance with the Weld County Code as well as the Colorado Energy & Carbon Management Commission (ECMC) rules and regulations. 20. Describe the proposed fire protection measures. The SE Weld Fire Protection District would be the emergency response district with jurisdiction in the unlikely event of an incident. Water or other fire retardants would be transported to the site, if necessary. The DCP emergency response team identified in the Emergency Contact Form will be the first line of response for emergency situations and will coordinate with local responders. 21. Explain how this proposal is consistent with the Weld County Comprehensive Plan per Chapter 22 of the Weld County Code. DCP intends to build and operate the Goldeneye Station in a manner that is not detrimental to the public health, safety, welfare, the environment, and wildlife resources, or detrimental to the character of the surrounding area. The proposed use shall be consistent with the Comprehensive Plan. The location, site, design, and operation characteristics of the proposed use shall be compatible with the existing and future land uses within the general area in which the proposed use is to be located, and will not create significant noise, traffic or other conditions or situations that may be objectionable or detrimental to other permitted uses in the vicinity. DCP understands that reasonable conditions may be placed on use by special review to protect public health, safety, welfare, the environment, and wildlife resources. The site shall be physically suitable for the type and intensity of the proposed land use. The proposed land use will not adversely affect traffic flow or parking in the neighborhood. • DCP will ensure and monitor compliance with all County, State, and Federal laws and rules • DCP will respect private property rights by minimizing or mitigating adverse land use impacts and providing mutual accommodation of the surface owners • DCP will mitigate, minimize, and avoid adverse impacts to adjacent and future land uses and ecological resources wherever possible • DCP will protect and enhance the health, safety, and general welfare of the citizens of Weld County by ensuring that the County's infrastructure and groundwater resources are protected • DCP will respect our agricultural heritage by performing interim and final reclamation in conformance with Weld County code This particular location was chosen by DCP and is important for the following reasons: • Proximity to existing and future locations of well pads and existing pipelines • No nearby residences • Appropriate size of parcel for compressor footprint • Existing access • Some surrounding vegetation ASCENT I I COLLECT • ANALYZE • DELIVER GEOSPATIAL DATA Crep Midstream. 22. Explain how this proposal is consistent with the intent of the zone district in which it is located. (Intent statements can be found at the beginning of each zone district section in Article III of Chapter 23 of the Weld County Code.) The Goldeneye Station will be located within the Agricultural Zone District within the AG -Rural Planning Area and is designated as within Urban/Non-Urban Mix Development Classification per the Comprehensive Plan layer of the Weld County Property Portal. The proposed project will have minimal impact on existing residential uses and is compatible, complementary, and consistent with surrounding land uses and will preserve as much grassland as possible within the parcel. By design, a natural gas compressor station reduces the amount of truck traffic on public roads by facilitating the compression and delivery of natural gas by pipeline. There are no existing on -site oil and gas facilities, ditches, powerlines, or railroads. 23. Explain how this proposal will be compatible with future development of the surrounding area or adopted master plans of affected municipalities. All planned equipment will be inside the compressor station's existing disturbance area and no additional ground will be disturbed. No additional development of the surrounding area is anticipated. 24. Explain how this proposal impacts the protection of the health, safety and welfare of the inhabitants of the neighborhood and the County. DCP is committed to being a good neighbor to the surrounding landowners and all Weld County residents. The proposed Goldeneye Station is not anticipated to result in on -site nuisances. Dust will be kept to a minimum by maintaining crushed gravel surfaces, keeping vehicle speeds to a minimum, and watering if necessary. DCP will also maintain the facility to limit erosion through the implementation of a site -specific stormwater plan and CDPHE stormwater permit, as applicable. Noxious weeds will be monitored and mitigated during construction and operations. The facility will be designed to minimize any obtrusive visual, odors, or noise issues. Lighting will be the minimum required for safe operations and lights will be downcast. The site will be kept clean of any debris and trash, which will promptly be disposed of at approved facilities. DCP is committed to working with the County and surrounding landowners to address any potential nuisance issues through the USR process and operational life of the facility. 25. Describe any irrigation features. If the proposed use is to be located in the A (Agricultural) Zone District, explain your efforts to conserve prime agricultural land in the locational decision for the proposed use. There are no existing or proposed irrigation features. The proposed Goldeneye Station location will be returned to agricultural land use (grazing) upon final reclamation. 26. Explain how this proposal complies with Article V and Article XI of Chapter 23 if the proposal is located within any Overlay Zoning District (Airport, Geologic Hazard, or Historic Townsites Overlay Districts) or a Special Flood Hazard Area identified by maps officially adopted by the County. The proposed location is not within an Overlay District Area nor within a Special Flood Hazard Area. ASCENT I I COLLECT • ANALYZE • DELIVER GEOSPATIAL DATA d p Midstream. 27. Detail known State or Federal permits as required for your proposed use(s) and the status of each permit. Provide a copy of any application or permit. DCP is currently working with the CDPHE on the air permitting required for the Goldeneye Station. DCP will also obtain any required stormwater discharge permits from the CDPHE prior to any regulated activities. There are no other state or federal permits that have been identified at this time. ASCENT I I COLLECT • ANALYZE. DELIVER GEOSPATIAL DATA at -p Midstream. Use by Special Review (USR) Environmental Health Questionnaire Answer the following questions per the Weld County Code, Chapters 14, 23 and 30. Please type on a separate sheet. If a question does not pertain to your proposal, please respond with an explanation — do not leave questions blank. Discuss the existing and proposed potable water source. If utilizing a drinking water well, include either the well permit or well permit application that was submitted to the State Division of Water Resources. If utilizing a public water tap, include a letter from the Water District, a tap or meter number, or a copy of the water bill. During construction, potable water will be provided by the contractor for its work crews. No potable water will be required for the operation of the facility. 2. Discuss the existing and proposed sewage disposal system. What type of sewage disposal system is on the property? If utilizing an existing on -site wastewater treatment system, provide the on -site wastewater treatment permit number. (If there is no on - site wastewater treatment permit due to the age of the existing on -site wastewater treatment system, apply for an on -site wastewater treatment permit through the Department of Public Health and Environment prior to submitting this application.) If a new on -site wastewater treatment system will be installed, please state "a new on -site wastewater treatment system is proposed." (Only propose portable toilets if the use is consistent with the Department of Public Health and Environment's portable toilet policy.) During construction the contractor will provide and maintain portable toilets for the construction crews. The facility will not have permanent restroom facilities. If restroom facilities are needed during the operation of the facility, portable toilets will be used. All portable toilets will be maintained by a licensed contractor. 3. If storage or warehousing is proposed, what type of items will be stored? During operation, only critical spare parts and additional safety equipment will be stored on site. 4. Describe where and how storage and/or stockpile of wastes, chemicals, and/or petroleum will occur on this site. The storage and use of paraffin solvents, corrosion inhibitors, and methanol may be possible. If necessary, the listed chemicals will be stored in properly labeled chemical totes with built-in secondary containment and SDS paperwork onsite. However, specific types, volumes, and locations are still under development at this time. 5. If there will be fuel storage on site, indicate the gallons and the secondary containment. State the number of tanks and gallons per tank. No fuel storage is planned onsite. There will be one 200 bbl maintenance tank within a ASCENT I I COLLECT • ANALYZE • DELIVER GEOSPATIAL DATA d p Midstream. If there will be washing of vehicles or equipment on site, indicate how the wash water will be contained. There will not be any washing of vehicles or equipment on site. 7. If there will be floor drains, indicate how the fluids will be contained. Floor drains are used in the compressor building to route any large lube oil leaks to a compressor skid drain sump, API 12F double walled 300 bbl tank. Floor drains are also incorporated on the dehy skid and BTEX VRU building and both are piped to an area drain sump, API 12F fiberglass double walled 90 bbl tank. Both tanks are buried below grade with only the roof of the tank exposed above ground. Any liquids collected in the tanks are pumped and trucked out. 8. Indicate if there will be any air emissions (e.g. painting, oil storage, etc.). DCP is working with the CDPHE to obtain applicable air permits required for the facility. Permit applications have been submitted to the CDPHE and are currently under review. DCP will comply with all CDPHE permit requirements during the construction and operation of the facility. 9. Provide a design and operations plan if applicable (e.g. composting, landfills, etc.). The USR Map of the Goldeneye Station design is included with this USR application. 10. Provide a nuisance management plan if applicable (e.g. dairies, feedlots, etc.). DCP will make every effort to minimize and mitigate any anticipated impacts the proposed project will have on public health and the environment, keeping in mind the operation standards of Sec. 23-4-1210 of the Weld County Code. The facility is proposed at a location that limits impacts to the environment and surrounding landowners. DCP is committed to working with the County and landowners to address and mitigate environmental concerns. 11. Additional information may be requested depending on type of land use requested. DCP acknowledges that additional information may be requested. ASCENT - I SOLUTIONS COLLECT • ANALYZE • DELIVER GEOSPATIAL DATA d p Midstream. Use by Special Review (USR) Development Review Questionnaire Answer the following questions per Section 8-11-40, Appendix 8-O, and Section 8-14-10 of the Weld County Code. Please type on a separate sheet. If a question does not pertain to your proposal, please respond with an explanation — do not leave questions blank. 1 Describe the access location and applicable use types (i.e., agricultural, residential, commercial/industrial, and/or oil and gas) of all existing and proposed access points to the parcel. Include the approximate distance each access is (or will be if proposed) from an intersecting county road. State that no existing access is present or that no new access is proposed, if applicable. DCP is in negotiation to utilize existing access roads on the Guttersen Ranch in order to avoid new construction. The proposed routes would cross onto the Guttersen Ranch from Keenesburg on WCR 59 (40.14569, -104.50962) and exit from the existing Enterprise station onto Guttersen property towards Goldeneye Station (40.18928, -104.48507). 2. Describe any anticipated change(s) to an existing access, if applicable. None are anticipated. 3. Describe in detail any existing or proposed access gate including its location. Access gates will be installed along the existing private access roads at the entry and exit of the Enterprise location in 30 -3N -63W and where the existing access crosses the northeast corner of the DD28-14 Pad (WOGLA19-0142) in Section 28 -3N -63W. 4. Describe the location of all existing accesses on adjacent parcels and on parcels located on the opposite side of the road. Include the approximate distance each access is from an intersecting county road. Parcel Access Type Status Location Details/Adjacent/Concurrent/Opposite side of Road Access Permits 121728000003 N/A none N/A Private lease roads only; unincorporated Weld County 121729000004 N/A none N/A Private lease roads only; unincorporated Weld County 121730000005 N/A none N/A Private lease roads only; unincorporated Weld County 121730000007 N/A none N/A Private lease roads only; unincorporated Weld County 121730000006 N/A none N/A Private lease roads only; unincorporated Weld County 121525400001 N/A none N/A Private lease roads only; unincorporated Weld County 121525300002 N/A none N/A paved private WCR 61; unincorporated Weld County west of Resolution Weld County ROW for WCR 28 Doc 20102189 121536200006 N/A none N/A paved private WCR 61; unincorporated Weld County 121536301001 N/A none N/A paved private WCR 61 /WCR 59 annexed by Town of Keenesburg adjoins Weld County ROW for WCR 59 document 18900022 File Reference 1.00/338 going south 130501000005 N/A none N/A paved WCR 59 annexed by Town of Keenesburg 130511000002 N/A none N/A paved WCR 59 annexed by Town of Keenesburg West of Weld County Rsolution ROW for WCR 24 Document 20102189 1.3051.1.000003 APOG20- 0082 Oil and Gas Complete paved WCR 59 Weld County access permit APOG20-0082; annexed by Town of Keenesburg AP19-00198, AP19-00194, AP19-00193, AP18-00321 AP21-00666, AP19- 00156, AP14-00109 130514000029 N/A none N/A paved WCR 59 annexed by Town of Keenesburg AP1.9-00232, APOG19-0150 9 ASCENT COLLECT • ANALYZE • DELIVER GEOSPATIAL DATA d p Midstream. 130514000030 N/A none N/A paved WCR 59 annexed by Town of Keenesburg 130514000029 N/A none N/A paved WCR 59 annexed by Town of Keenesburg 130514000015 N/A none N/A paved WCR 59 annexed by Town of Keenesburg 130514400022 N/A none N/A paved WCR 59 annexed by Town of Keenesburg 130514400021 N/A none N/A paved WCR 59 annexed by Town of Keenesburg 130514400020 N/A none N/A paved WCR 59 annexed by Town of Keenesburg 130514400019 N/A none N/A paved WCR 59 annexed by Town of Keenesburg 130514400017 N/A none N/A paved WCR 59 annexed by Town of Keenesburg AP18-00517 130523100003 N/A none N/A paved WCR 59 changes from annexed by Keenesburg to Weld County maintained south of WCR 20. AP19-00592 130523100004 N/A none N/A paved WCR 59 is paved localWeld County maintained road AP18-00522 130523100005 N/A none N/A paved WCR 59 is paved Inca I. WeI.d County maintained road 130523100004 N/A none N/A paved WCR 59 is paved localWeld County maintained road 130523400025 N/A none N/A paved WCR 59 is paved Inca I. WeI.d County maintained road AP18-00478 130523000018 N/A none N/A paved WCR 59/WCR 18 is paved local Weld County maintained road 130523400025 N/A none N/A paved WCR 59/WCR 18 is paved local Weld County maintained road AP18-00668 130523000004 N/A none N/A paved WCR 59/WCR 18 is paved local Weld County maintained road AP21-00017 130526200029 N/A none N/A paved local Weld County maintained WCR 18 end south to State maintained paved major collector Market Street 5. Describe any difficulties seeing oncoming traffic from an existing access and any anticipated difficulties seeing oncoming traffic from a proposed access. There are no line -of -sight concerns with access from CR 59, as this county road is flat with no visual blocking. 6. Describe any horizontal curve (using terms like mild curve, sharp curve, reverse curve, etc.) in the vicinity of an existing or proposed access. There are no horizontal curves in the vicinity of this existing oil and gas location. 7. Describe the topography (using terms like flat, slight hills, steep hills, etc.) of the road in the vicinity of an existing or proposed access. The topography is flat terrain with no blocking line -of -sight to the county road. 10 ASCENT - I SOLUTIONS COLLECT • ANALYZE • DELIVER GEOSPATIAL DATA DCP WELD ASSET CONTACTS Emergency Response Plan Mike Smith Nick Hagenlock Branden Hayes Troy Dolifka Gordon Alexander Christopher Salazar Jaton Schell Craig Pralle Caroline Sons Lance Thomasson Michael Pavlak Wolfgang Foerg Kenneth Christensen Alex Hodson Jeff Little Willi Blair Zach Prociv Jeffrey Eubank Travis Brown Construction lead ROW lead Environmental Support Weld Field Supervisor Weld Field Supervisor Boosters Supervisor (North) Booster Supervisor (South) Area Manager ICC Gas Control Safety & PSM Manager Director, Environmental - North Business Unit DOT Pipeline Compliance Supervisor Maintenance/Reliability Corrosion Tech Lucerne I & II Plant Supervisor Mewbourn Plant Supervisor O'Connor Plant Supervisor Enterprise/Roggen/Spindle Sup Platteville/Greeley Plant Supervisor Area Manager Houston Control Center — 888-204-1781 (All Emergencies) Houston Control Center — 800-435-1679 (Hazardous Liquid) 970-324-4327 303-829-4837 970-373-8905 970-539-1934 970-302-7144 970-519-1140 970-590-1657 970-539-1779 720-471-9715 409-527-2263 720-357-6891 970-397-0732 303-565-0475 970-473-5868 970-301-2015 719-349-1315 970-451-1381 970-415-2036 970-539-1882 970-573-2866 Etta Mids tieanr. February 28, 2025 DELIVERED VIA ELECTRONIC MAIL ONLY Colorado Department of Public Health and Environment Air Pollution Control Division - Oil & Gas Division 4300 Cherry Creek Drive South Denver, Colorado 80246-1530 RE: DCP Operating Company, LP Goldeneye Compressor Station (AIRS TBD) Initial Construction Permit Application Dear Sir or Madam: DCP Operating Company, LP 3026 4th Avenue Greeley, CO 80631 DCP Operating Company, LP (DCP) is submitting the attached construction permit application for the proposed greenfield Goldeneye Compressor Station (Goldeneye, AIRS TBD), located in SWSW Section 28, T3N, R63W, Weld County, Colorado. This compressor station will operate three (3) compressors driven by electric drive motors (EDMs), and will operate without any onsite atmospheric storage tanks. There will be no combustion sources located at this facility. As such, this application only includes two (2) emission sources requiring construction permit coverage: aggregate routine or predictable gas emissions (ROPE) from equipment at Goldeneye and rod packing for three (3) electric reciprocating compressors, plus the collection of APEN and Permit exempt sources at this facility. DCP is providing the following attachments as part of this application submittal, which are labeled to match the attachments specified in the included Form APCD-100 where applicable: • Attachment A — APEN Filing Fees (Proof of Payment); • Attachment B — APENs; • Attachment C — Emission Calculations and Supporting Documentation; • Attachment D — Company Contact Information Form (APCD-101); • Attachment E — Environmental Justice Documentation; • Attachment H — Facility Wide Emissions Inventory form (APCD-102); • Attachment I — Process description, flow diagram, and plot plan; • Attachment K — Regulatory Analysis; and • Attachment L — ROPE Compliance Demonstration Plan. The following Attachments from the completeness checklist Form APCD-100 are not required for this permit application update as they are not applicable to the underlying application: • Attachment F — Ambient Air Impact Analysis — The changes in emissions proposed in this application are limited to VOCs and HAPs only. Thus, there is no ambient air impact analysis modeling required. • Attachment G — General Permit Monitoring Compliance Documentation — The application requests coverage under a traditional construction permit. Thus, it is not subject to general permit monitoring compliance documentation. • Attachment J — Operating & Maintenance Plan — DCP will work with CDPHE to determine O&M applicability to the proposed system for recovery of rod packing emissions to inlet during review of this application. As such, DCP is not providing an O&M plan initially as part of this application. If you have any questions, I can be contacted at Mason.J.Martin@p66.com or at 970-502-7323. Sincerely, DCP OPERATING COMPANY, LP Mason Martin Environmental Engineer COLORADO Air Pollution Control Division Department of Public Health & Environment Permit Application/Registration Checklist Form APCD-100 • A complete permit application must include the documentation outlined in this form unless otherwise noted. • If the permit application does not include the required documentation, it may be rejected. • Filing fees for permit applications that are rejected due to incompleteness will not be refunded. • Certain types of emission sources may require additional forms. Refer to the Division's APENs and air permits webpage to see whether any APEN supplement forms are required for your source. • If the application is for a major NANSR or PSD permit, send eight (8) total copies. Company Name: DCP Operating Company, LP Facility/Site Name(s): Goldeneye Compressor Station What type of permit coverage is requested by this application? Traditional construction permit General permit (e.g. GP01, GP03, etc.) Are you requesting (an) individual or facility -wide permit(s)? Individual permit(s) covering (a) single emissions point(s). Facility -wide permit covering multiple emissions points. Check one box in each section of the following table to certify that the referenced documentation is included with the permit application. Do not check more than one box per section unless otherwise noted. Section Description of Required Permit Application Element A ✓ The relevant filing fee(s) are being submitted with this application, or were already submitted. B I This application contains the relevant Air Pollutant Emission Notice(s). (APCD Form Series 200) C I This application contains relevant emission calculations and supporting documentation. D This application contains company contact information documentation. (Form APCD-101) There is only a single point of contact for this application. (Form APCD-101 is not required.) (Checklist continued on next page) Form APCD-100 - Permit Application/Registration Checklist - Revision 9/2024 1 I alto COLORADO Department of Public Health & Environment Required Permit Application Element Checklist (continued): E Environmental Justice Documentation A complete Environmental Justice (EJ) Summary for this project was submitted prior to this application, and was reviewed and verified by the Division. The verification number for this EJ Summary is 85952141 This application is exempt from EJ Summary requirements for the following reason(s), per Colorado Regulation Number 3, Part B, Section III.B.5.e. (check all that apply): This application is only for an administrative permit amendment. (Section III.B.5.e.(i)) I. B.5.e. (i )) This application requests an overall decrease or no change in the facility -wide annual emission limits of NOx, VOC, PM2.5, and BTEX pollutants. (Section III.B.5.e.(ii)) This application is for a modification at an existing source of emissions, and an up-to-date EJ Summary was already verified by the Division on . (Section III.B.5.e.(iii)) F Ambient Air Impact Analysis Documentation This application is exempt from modeling determination requirements for the following reason(s), per the document Permitting Section Addendum to the Modeling Guideline (2/21/2024) (check all that app ✓ lY) • "No Emission Increases or 'Pure Decreases' in a Permit Modification" (Section 2.1) "Only VOC Increases" (Section 2.2) "APEN-exempt and Permit -exempt Emission Sources" (Section 2.3) "Land Development Projects Requesting Coverage Under a General Permit (GP03)" (Section 2.4) A request for modeling determination for the project(s) included in this application has been submitted, and the Division determined that additional modeling was not required. This application contains the version of the modeling determination request that was reviewed and approved by the Division. (Form APCD-114) This application is for a traditional construction permit, and a modeling analysis for the project(s) included in this application has been submitted, but not yet approved by the Division. A modeling analysis for the project(s) included in this application has been approved by the Division. This application contains any relevant documentation of this approval, including the submitted modeling analysis and the Division's modeling review comments which document compliance with the NAAQS and the conditions of approval for the proposed project(s). This application is for a traditional construction permit, and a NAAQS monitoring plan is being submitted with this application, or has already been submitted. If this monitoring plan has already been reviewed and approved by the Division, this application contains the plan itself and documentation of plan approval. (Checklist continued on next page) Form APCD-100 - Permit Application/Registration Checklist - Revision 9/2024 ja* COLORADO Department of Public Health 6 Environment Required Permit Application Element Checklist (continued): G General Permit Monitoring Compliance Documentation ✓ This application is: A) requesting coverage under a traditional construction permit, and/or B) the emission source(s) contained in this application are not located in a Disproportionately Impacted (For emission Community, (DI) the Community. following source(s) three contained and: options) in this This application application is requesting are located coverage in a Disproportionately under a general Impacted permit, (DI) the This source will comply with source -specific monitoring requirements as outlined in Regulation Number 3, Part B, Section III.J.2. This source will pay community monitoring fees as outlined in Regulation Number 3, Part B, Section III.J.3. This source will comply with well production facility monitoring requirements as outlined in Regulation Number 3, Part B, Section III.J.4. This source is not subject to Regulation Number 3, Part B, Sections III.J.2., III.J.3, or III.J.4. H ✓ This application contains a facility -wide emissions inventory. (Form APCD-102 for oil Et gas sources, or form APCD-102a for non -oil Et gas sources) ✓ This application contains a process description, flow diagram, and plot plan of the emissions unit and/or facility, as relevant. J This application contains the relevant Operating Et Maintenance (O&M) Plan documentation. (APCD Form Series 300) i This application is: A) for a true minor source of emissions, and/or B) for an emissions source that is not (APCD associated Form Series with the 300 oil Et gas is not required.) industry, and/or C) requesting coverage under a general permit. Applicant Certification: I hereby certify that all information contained herein and information submitted with this application is complete, true, and correct. inAurriliLtLA 02/28/2024 Signature of Legally Authorized Person (not a vendor or consultant) Date Mason Martin Name (print) Environmental Engineer Title Send the application with all required information/documentation (including this form) and any applicable fees to: CDPHE - Air Pollution Control Division APCD-SS-B1 4300 Cherry Creek Drive South Denver, CO 80246-1530 Form APCD-100 - Permit Application/Registration Checklist - Revision 9/2024 Ca, COLORADO 3 I Department of Public Health Er Environment GOLDENEYE COMPRESSOR STATION Greenfield Construction Permit Application DCP Operating Company, LP Prepared By: Christopher Platt — Senior Consultant Veronica Lui — Consultant TRINITY CONSULTANTS 1999 Broadway Suite 820 Denver, CO 80202 720.638.7647 x112 February 2025 Trinity/ Consultants -_a TABLE OF CONTENTS 1. ATTACHMENT A 1-1 1.1 APEN Filing Fees (2 APEN * $242.00 $484.00).......................................................1-1 2. ATTACHMENT B 2-1 2.1 APENs (Air Pollution Emission Notices)...................................................................... 2-1 3. ATTACHMENT C 3-1 3.1 Emission Calculations and Supporting Documentation .............................................. 3-1 3.1.1 ROPE - Summary Tables and Gas Analyses; 3-2 3.1.2 ROPE — Notes / Footnotes; 3-3 3.1.3 Reciprocating Compressor Rod Packing Vent Emissions; 3-4 3.1.4 List of APEN and Permit Exempt Activities 3-5 4. ATTACHMENT D 4-1 4.1 Form APCD-101 (Company Contact Information Form) ............................................. 4-1 5. ATTACHMENT E 5-1 5.1 Environmental Justice Documentation....................................................................... 5-1 6. ATTACHMENT H 6-1 6.1 Form APCD-102 (Facility Wide Emission Inventory) .................................................. 6-1 7. ATTACHMENT I 7-1 7.1 Process Description and Facility Information............................................................. 7-1 7.1.1 Process Description 7-1 ProcessFlow Diagram................................................................................................. 7-2 7.2 7.3 PlotPlan......................................................................................................................7-3 8. ATTACHMENT K 8-1 8.1 Regulatory Analysis.................................................................................................... 8-1 8.1.1 Colorado State Regulations 8-1 8.1.2 New Source Performance Standards (NSPS) 8-5 8.1.3 National Emission Standards for Hazardous Air Pollutants 8-5 9. ATTACHMENT L 9-1 9.1 Compliance Demonstration Plan for Routine and Predictable Venting Emissions...... 9-1 DCP Operating Company, LP / Goldeneye Compressor Station Trinity Consultants i 1. ATTACHMENT A 1.1 APEN Filing Fees (2 APEN * $242.00 = $484.00) DCP Operating Company, LP / Goldeneye Compressor Station Trinity Consultants 1-1 Payment Receipt Confirmation Your payment was successfully processed. Transaction Summary Description CDPHE Invoice Payment Portal Service Fee TOTA L Receipt Confirmation Amount $484.00 $11.66 $495.66 Transaction Detail The following amounts will be remitted back to the agency. SKU CDPHEPAY Description CDPHE Invoice Payment Portal Service Fee Unit Price $484.00 $11.66 Quantity 1 Total Amount Paid Amount $484.00 $11.66 $495.66 This online service is provided by a 3rd party working in partnership with the state of Colorado. The price includes a service fee of $.75 plus 2.25% of the order total for credit card payments or $1 for electronic check payments. Customer Information Customer Name Company Name Local Reference ID Payment Information Payment Type Credit Card Type Billing Information Billing Address Address 2 Billing City, State Billing Zip/Postal Code Country Chris Platt Trinity Consultants 2daba674-ed24-4820-a80b- 65912be8ee3d Credit Card VISA 1223 Race Street #303 Denver, CO 80206 US Receipt Date Receipt Time Credit Card Number Order ID Name on Credit Card 2/28/2025 11:38:03 AM MST ******6848 245299124 Christopher W Platt Phone Number 3033195380 This receipt has been emailed to the address below. Email Address christopher.platt©trinityconsultants. com 2. ATTACHMENT B 2.1 APENs (Air Pollution Emission Notices) This section contains the following APENs being submitted for this facility: ► AIRS TBD - Routine or Predictable Emissions (ROPE) (ID: ROPE Venting); and ► AIRS TBD - Reciprocating Compressor Rod Packing Vents (ID: RPV Inlet) DCP Operating Company, LP / Goldeneye Compressor Station Trinity Consultants 24 Routine or Predictable Gas Venting APEN Form APCD-;2,13 Air Pollutant Emission Notice (APEN) and Application for Construction Permit All sections of this APEN form must be completed for both new and existing sources, including APEN updates. The Permit Application/Registration Checklist (Form APCD-100) must also be completed and submitted with this APEN form, unless specifically exempted. Incomplete applications will be rejected and will require re -submittal. Your application will be rejected if it is filled out incorrectly, is missing information, or lacks payment for applicable fees. The re -submittal will require new payment for applicable fees. This APEN is to be used only for routine or predictable gas venting emissions associated with oil and gas industry operations. If your emission source does not fall into this category, there may be a more specific APEN available for your source (e.g. gas venting, hydrocarbon liquid loading, condensate storage tanks, etc.). In addition, the General APEN (Form APCD-200) is available if the specialty APEN options will not satisfy your reporting needs. A list of all available APEN forms and associated addendum forms can be found on the Air Pollution Control Division (APCD) website. This emission notice is valid for five (5) years. Submission of a revised APEN is required 30 days prior to expiration of the five-year term, or when a reportable change is made (significant emissions increase, increase production, new equipment, change in fuel type, etc.). See Regulation No. 3, Part A, II.C. for revised APEN requirements. Permit Number: AIRS ID Number: [Leave blank unless APCD has already assigned a permit # and AIRS ID] Section 1 - Administrative Information Company Name: DCP Operating Company, LP Site Name: Goldeneye Compressor Station Site Location: SWSW Section 28, T6N, R63W Mailing Address: 3026 4th Ave. (Include Zip Code) Site Location County: Weld NAICS or SIC Code: 4922 Greeley, CO 80631 Contact Person: Mason Martin Phone Number: 970-502-7323 E -Mail Address2: mason.j.martin@p66.com 1 Use the full, legal company name registered with the Colorado Secretary of State. This is the company name that will appear on all documents issued by the APCD. Any changes will require additional paperwork. 2 Permits, exemption letters, and any processing invoices will be issued by the APCD via e-mail to the address provided. Form APCD-213 - Routine or Predictable Gas Venting APEN - Revision 01/2024 COLORADO Department of Public Health Er Environment Permit Number: AIRS ID Number: [Leave blank unless APCD has already assigned a permit # and AIRS ID] Section 2 - Requested Action 0 ■ ■ ■ NEW permit OR newly -reported emission source 0 ■ Request coverage under traditional construction permit Request coverage under General Permit GP11 If General Permit coverage is requested, the General Permit registration fee of $756.00 must be submitted along with the APEN filing fee. -OR- MODIFICATION to existing permit (check each box below that applies) ■ ■ Change equipment or activity ■ Change company name3 ■ Add point to existing permit Change permit limit ■ Transfer of ownership4 ■ Other (describe below) -OR- APEN submittal for update only (Note blank APENs will not be accepted) - ADDITIONAL PERMIT ACTIONS - Limit Hazardous Air Pollutants (HAPs) with a federally -enforceable limit on Potential To Emit (PTE) Additional Info at Notes: 3 For company name change, a completed Company Name Change Certification Form (Form APCD-106) must be submitted. For sources covered by a General Permit, a new General Permit registration fee must be submitted for a company name change. 4 For transfer of ownership, a completed Transfer of Ownership Certification Form (Form APCD-104) must be submitted. For sources covered by a General Permit, a new General Permit registration fee must be submitted for a transfer of ownership. Section 3 - General Information Company equipment Identification No. (optional): ROPE Venting For existing sources, facility operation began on: For new, modified, or reconstructed sources, the projected facility start-up date is: Normal Hours of Facility Operation: 24 hours/day 7 TBD days/week 52 weeks/year Facility type: Well Production Production Facility Facility or Centralized Other midstream, oil Et gas or downstream) facility (upstream, ❑ ✓ Is this stationary source located in any NAAQS nonattainment area? Yes No ✓ ❑ Is this stationary source considered a Major Source of HAP emissions? Yes No ❑ ✓ Are emissions stationary source from ALL reported routine on this or predictable APEN? gas venting activities/events at this Yes No ✓ ❑ If yes, and previously existing permit the permitted activities/events number(s) separately, and AIRS were list ID the point(s): Fugitive activities/events source stationary and emissions source point -source MUST from been routine appropriately be emissions reported or predictable from separately. separated routine gas If for or applicable, venting predictable APEN activities/events reporting gas have venting fugitive purposes? and at this point- Yes No ✓ ❑ Emissions reported on this APEN form are: Point -Source Fugitive ✓ ❑ Form APCD-213 - Routine or Predictable Gas Venting APEN - Revision 01/2024 COLORADO Department of Public Health 8 Environment Permit Number: AIRS ID Number: [Leave blank unless APCD has already assigned a permit # and AIRS ID] Section 4 - Venting Activities/Events Information Complete all fields for each venting activity/event type. Uncontrolled emissions from all point -source routine or predictable gas venting activities/events at a stationary source, including those separately reported/permitted, must be grouped together for comparison with the APEN reporting thresholds of Regulation 3, Part A Sections II.D.1.a and II.d.1.b, as applicable (fugitive and point -source emissions must be grouped separately). If the total grouped facility -wide emissions from all routine or predictable gas venting activities/events for any criteria and/or non -criteria pollutant exceeds the applicable APEN reporting threshold, all of those emissions must be reported on one or more APENs. The operator may choose to report those emissions on separate APENs. How many venting activity/event types are being reported on this APEN? If greater than five (5), attach completed addendum(s) to this APEN form, using the Routine or Predictable Gas Venting APEN Addendum - Form APCD-215, available on the APCD website. Table 1: Process Information for Each Venting Activity/Event Type From what year is the actual annual amount? N/A Activity/ Event ID Activity Description Actual Annual Process Amount 6 (provide units) Requested Annual process Limits b (provide units) Controlled? (yes or no) Control Method(s) Pollutants Controlled Overall Control 7 Efficiency Process Parameter g Monitoring 1 ROPE - Compressors 415.56 Mscf/yr Y Rey 7, Part D, Section II.H. VOGHAPs C 2 ROPE - Pig Units --- 354.21 Mscf/yr Y Reg 7, Part D, Section II.H. VOC/HAPs --- C 3 ROPE - Other 51.46 Msef/yr Y Reg 7, Part D, Section II.H. VOC/HAPs C 4 5 5 Requested values will become permit Limitations or will be evaluated for exempt status, as applicable, and should consider future process growth. Requested values are required on all APENs, including APEN updates. The APCD reserves the option to set individual process and/or emission limits for specific activity/event types. 6 Provide units that are relevant to the individual process (e.g. number of events per year, volume of gas vented annually, etc.). 7 If seeking coverage under the General Permit GP11, the requested control efficiency for a combustion device may not exceed 95%. 8 Select one of the following four process parameter monitoring options for each activity/event type: (A) event count; (B) volume measurement (flow meter); (C) volume calculation (parametric monitoring); or (D) other (description must be provided). Table 2: Criteria Pollutant Emission Factor Information by Activity/Event ID Pollutant Uncontrolled Emission Factors by Activity/Event ID 1 2 3 4 5 Emission Factor Units9 Ib/Mscf Ib/Mscf Ib/Mscf TSP --- --- --- PM1 o --- --- PM2.5 - SOX NOX Co VOC 37.78 11.04 - 37.78 (See Calcs) 37.78 Table 3: Non -Criteria Pollutant Emission Factor Information by Activity/Event ID Chemical Name Chemical Abstract Service (CAS) Number Uncontrolled Emission Factors by Activity/Event ID 1 2 3 4 5 Emission Factor Units9.. Ib/Mscf Ib/Mscf Ib/Mscf Benzene 1 71432 --- --- --- Toluene 108883 --- --- --- Ethylbenzene 100414 --- --- --- Xylene 1330207 n -Hexane 110543 0.63 0.44 - 0.63 (See Calcs) 0.63 2,2,4-Trimethylpentane 540841 Methanol 107018 9Emission factor units for each activity/event type must coincide with the units provided for Actual Annual Process Amount and Requested Annual Process Limit in Table 1. Form APCD-213 - Routine or Predictable Gas Venting APEN - Revision 01/2024 Department of Public Health & Environment Permit Number: AIRS ID Number: [Leave blank unless APCD has already assigned a permit # and AIRS ID] Section 5 - Geographical Information Geographical Coordinates (Latitude/Longitude or UTM) 40.19 / -104.4508 Section 6 - Criteria Pollutant Emissions Information Additional Required Documentation (not required for APEN updates): 0 0 Attach all relevant materials related to emission factor development, for all pollutants for all requested venting activities/events, including but not limited to: site -specific (or representative) sampling, calculation methodologies, etc. Facility Wide Emissions Inventory Form (Form APCD-102) From what year is the following reported actual annual emissions data? N/A Use the following table to report the total combined criteria pollutant emissions from all venting activities/events reported on this APEN: Pollutant Actual Annual Emissions Requested Annual Permit Emission Limit(s)5 Uncontrolled (tons/year) Emissions Controlled (tons/year) Emissionsla Uncontrolled (tons/year) Emissions Controlled (tons/year) Emissions TSP PM1 a PM2.5 SOX NOX CO VOC 15.51 15.51 5 Requested values will become permit limitations or will be evaluated for exempt status, as applicable, and should consider future process growth. Requested values are required on all APENs, including APEN updates. The APCD reserves the option to set individual process and/or emission limits for specific activity/event types. 10 Annual emission fees will be based on actual controlled emissions reported. If source has not yet started operating, provide projected emissions. The requested annual permit emission limits included above reflect specific limits for the 3 ROPE activities included under this AIRS point: This limit represents the aggregate Compressor ROPE + Pig Unit ROPE + Other Equipment ROPE at this facility. Section 7 - Non -Criteria Pollutant Emissions Information Are the total uncontrolled actual emissions of any non -criteria pollutant (e.g. HAP - hazardous air pollutant), from all venting activities/events reported on this APEN, • Yes ■ No equal to or greater than 250 lbs/year? If yes, use the following table to report the total combined non -criteria pollutant (HAP) emissions from all venting activities/events reported on this APEN: Chemical Name Abstract (CAS) Chemical Number Service Actual Annual Emissions Uncontrolled (lbs/year) Emissions Controlled (lbs/year) Emissions10 Benzene 71432 Toluene 108883 Ethylbenzene 100414 Xylene 1330207 - n -Hexane 110543 513.54 513.54 2,2,4-Trimethylpentane 540841 Methanol 107018 - - 10 Annual emission fees will be based on actual controlled emissions reported. If source has not yet started operating, provide projected emissions. Form APCD-213 - Routine or Predictable Gas Venting APEN - Revision 01/2024 CC.% COLORADO Department of Public Health & Environment Permit Number: AIRS ID Number: [Leave blank unless APCD has already assigned a permit # and AIRS ID] Section 8 - Applicant Certification I hereby certify that all information contained herein and information submitted with this application is complete, true, and correct. If this is a registration for coverage under General Permit GP11, I further certify that this source is and will be operated in full compliance with each condition of General Permit GP11. 02/28/2025 Signature of Legally Authorized Person (not a vendor or consultant) Date Mason Martin Environmental Engineer Name (print) Title Check the appropriate box to request a copy of the: Draft permit prior to issuance Draft permit prior to public notice El El (Checking any of these boxes may result in an increased fee and/or processing time) This emission notice is valid for five (5) years. Submission of a revised APEN is required 30 days prior to expiration of the five year term, or when a reportable change is made (significant emissions increase, increase production, new equipment, change in fuel type, etc.). See Regulation No. 3, Part A, II.C. for revised APEN requirements. Send this form along with $242.00 and the General Permit registration fee of $756.00, if applicable, to: Colorado Department of Public Health and Environment Air Pollution Control Division APCD-SS-B1 4300 Cherry Creek Drive South Denver, CO 80246-1530 For more information or assistance, contact: Small Business Assistance Program cdphe_apcd_sbap@state.co.us APCD Main Phone Number (303) 692-3100 Make check payable to: Colorado Department of Public Health and Environment Alternatively, payment can be provided online, by credit card or electronic check, via the APCD Payment Portal. Form APCD-213 - Routine or Predictable Gas Venting APEN - Revision 01/2024 5I dam, COLORADO V ' Department of Public Health & Environment Routine or Predictable Gas Venting APEN Form APCD-;2,13 Air Pollutant Emission Notice (APEN) and Application for Construction Permit All sections of this APEN form must be completed for both new and existing sources, including APEN updates. The Permit Application/Registration Checklist (Form APCD-100) must also be completed and submitted with this APEN form, unless specifically exempted. Incomplete applications will be rejected and will require re -submittal. Your application will be rejected if it is filled out incorrectly, is missing information, or lacks payment for applicable fees. The re -submittal will require new payment for applicable fees. This APEN is to be used only for routine or predictable gas venting emissions associated with oil and gas industry operations. If your emission source does not fall into this category, there may be a more specific APEN available for your source (e.g. gas venting, hydrocarbon liquid loading, condensate storage tanks, etc.). In addition, the General APEN (Form APCD-200) is available if the specialty APEN options will not satisfy your reporting needs. A list of all available APEN forms and associated addendum forms can be found on the Air Pollution Control Division (APCD) website. This emission notice is valid for five (5) years. Submission of a revised APEN is required 30 days prior to expiration of the five-year term, or when a reportable change is made (significant emissions increase, increase production, new equipment, change in fuel type, etc.). See Regulation No. 3, Part A, II.C. for revised APEN requirements. Permit Number: AIRS ID Number: [Leave blank unless APCD has already assigned a permit # and AIRS ID] Section 1 - Administrative Information Company Name: DCP Operating Company, LP Site Name: Goldeneye Compressor Station Site Location: SWSW Section 28, T6N, R63W Mailing Address: 3026 4th Ave. (Include Zip Code) Site Location County: Weld NAICS or SIC Code: 4922 Greeley, CO 80631 Contact Person: Mason Martin Phone Number: 970-502-7323 E -Mail Address2: mason.j.martin@p66.com 1 Use the full, legal company name registered with the Colorado Secretary of State. This is the company name that will appear on all documents issued by the APCD. Any changes will require additional paperwork. 2 Permits, exemption letters, and any processing invoices will be issued by the APCD via e-mail to the address provided. Form APCD-213 - Routine or Predictable Gas Venting APEN - Revision 01/2024 COLORADO Department of Public Health Er Environment Permit Number: AIRS ID Number: [Leave blank unless APCD has already assigned a permit # and AIRS ID] Section 2 - Requested Action 0 ■ ■ ■ NEW permit OR newly -reported emission source 0 ■ Request coverage under traditional construction permit Request coverage under General Permit GP11 If General Permit coverage is requested, the General Permit registration fee of $756.00 must be submitted along with the APEN filing fee. -OR- MODIFICATION to existing permit (check each box below that applies) ■ ■ Change equipment or activity ■ Change company name3 ■ Add point to existing permit Change permit limit ■ Transfer of ownership4 ■ Other (describe below) -OR- APEN submittal for update only (Note blank APENs will not be accepted) - ADDITIONAL PERMIT ACTIONS - Limit Hazardous Air Pollutants (HAPs) with a federally -enforceable limit on Potential To Emit (PTE) Additional Info at Notes: 3 For company name change, a completed Company Name Change Certification Form (Form APCD-106) must be submitted. For sources covered by a General Permit, a new General Permit registration fee must be submitted for a company name change. 4 For transfer of ownership, a completed Transfer of Ownership Certification Form (Form APCD-104) must be submitted. For sources covered by a General Permit, a new General Permit registration fee must be submitted for a transfer of ownership. Section 3 - General Information Company equipment Identification No. (optional): RPV Inlet For existing sources, facility operation began on: For new, modified, or reconstructed sources, the projected facility start-up date is: Normal Hours of Facility Operation: 24 hours/day 7 TBD days/week 52 weeks/year Facility type: Well Production Production Facility Facility or Centralized Other midstream, oil Et gas or downstream) facility (upstream, ❑ ✓ Is this stationary source located in any NAAQS nonattainment area? Yes No ✓ ❑ Is this stationary source considered a Major Source of HAP emissions? Yes No ❑ ✓ Are emissions stationary source from ALL reported routine on this or predictable APEN? gas venting activities/events at this Yes No ✓ ❑ If yes, and previously existing permit the permitted activities/events number(s) separately, and AIRS were list ID the point(s): Fugitive activities/events source stationary and emissions source point -source MUST from been routine appropriately be emissions reported or predictable from separately. separated routine gas If for or applicable, venting predictable APEN activities/events reporting gas have venting fugitive purposes? and at this point- Yes No ✓ ❑ Emissions reported on this APEN form are: Point -Source Fugitive ✓ ❑ Form APCD-213 - Routine or Predictable Gas Venting APEN - Revision 01/2024 COLORADO Department of Public Health 8 Environment Permit Number: AIRS ID Number: [Leave blank unless APCD has already assigned a permit # and AIRS ID] Section 4 - Venting Activities/Events Information Complete all fields for each venting activity/event type. Uncontrolled emissions from all point -source routine or predictable gas venting activities/events at a stationary source, including those separately reported/permitted, must be grouped together for comparison with the APEN reporting thresholds of Regulation 3, Part A Sections II.D.1.a and II.d.1.b, as applicable (fugitive and point -source emissions must be grouped separately). If the total grouped facility -wide emissions from all routine or predictable gas venting activities/events for any criteria and/or non -criteria pollutant exceeds the applicable APEN reporting threshold, all of those emissions must be reported on one or more APENs. The operator may choose to report those emissions on separate APENs. How many venting activity/event types are being reported on this APEN? If greater than five (5), attach completed addendum(s) to this APEN form, using the Routine or Predictable Gas Venting APEN Addendum - Form APCD-215, available on the APCD website. Table 1: Process Information for Each Venting Activity/Event Type From what year is the actual annual amount? N/A Activity/ Event ID Activity Description Actual Annual Process Amount 6 (provide units) Requested Annual Process Limits b (provide units) Controlled? (yes or no) Control Methods) Pollutants Controlled Overall Control Efficiency Process Parameter Monitoring g 1 Inlet Compressor Rod Packing Vents --- 694 Mscf/yr Y Recovery to Process with ,tc1/o Downtime to Atm. VOC/HAPs 96% D 2 3 4 5 5 Requested values will become permit Limitations or will be evaluated for exempt status, as applicable, and should consider future process growth. Requested values are required on all APENs, including APEN updates. The APCD reserves the option to set individual process and/or emission limits for specific activity/event types. 6 Provide units that are relevant to the individual process (e.g. number of events per year, volume of gas vented annually, etc.). 7 If seeking coverage under the General Permit GP11, the requested control efficiency for a combustion device may not exceed 95%. 8 Select one of the following four process parameter monitoring options for each activity/event type: (A) event count; (B) volume measurement (flow meter); (C) volume calculation (parametric monitoring); or (D) other (description must be provided). Table 2: Criteria Pollutant Emission Factor Information by Activity/Event ID Pollutant Uncontrolled Emission Factors by Activity/Event ID 1 2 3 4 5 Emission Factor Units9 Ib/Mscf TSP --- PM1 o --- PM2.5 SOX NOX Co VOC 37.78 Table 3: Non -Criteria Pollutant Emission Factor Information by Activity/Event ID Chemical Name Chemical Abstract Service (CAS) Number Uncontrolled Emission Factors by Activity/Event ID 1 2 3 4 5 Emission Factor Units9.. Ib/Mscf Benzene 1 71432 0.08 Toluene 108883 0.07 Ethylbenzene 100414 0.07 Xylene 1330207 0.07 n -Hexane 110543 0.63 2,2,4-Trimethylpentane 540841 0.07 Methanol 107018 0.11 9Emission factor units for each activity/event type must coincide with the units provided for Actual Annual Process Amount and Requested Annual Process Limit in Table 1. Form APCD-213 - Routine or Predictable Gas Venting APEN - Revision 01/2024 Department of Public Health & Environment Permit Number: AIRS ID Number: [Leave blank unless APCD has already assigned a permit # and AIRS ID] Section 5 - Geographical Information Geographical Coordinates (Latitude/Longitude or UTM) 40.191 1-104.4877 Section 6 - Criteria Pollutant Emissions Information Additional Required Documentation (not required for APEN updates): 0 0 Attach all relevant materials related to emission factor development, for all pollutants for all requested venting activities/events, including but not limited to: site -specific (or representative) sampling, calculation methodologies, etc. Facility Wide Emissions Inventory Form (Form APCD-102) From what year is the following reported actual annual emissions data? N/A Use the following table to report the total combined criteria pollutant emissions from all venting activities/events reported on this APEN: Pollutant Actual Annual Emissions Requested Annual Permit Emission Limit(s)5 Uncontrolled (tons/year) Emissions Controlled (tons/year) Emissionsla Uncontrolled (tons/year) Emissions Controlled (tons/year) Emissions TSP PM10 PM2.5 SOX NOX CO VOC 178.70 7,15 5 Requested values will become permit limitations or will be evaluated for exempt status, as applicable, and should consider future process growth. Requested values are required on all APENs, including APEN updates. The APCD reserves the option to set individual process and/or emission limits for specific activity/event types. 10 Annual emission fees will be based on actual controlled emissions reported. If source has not yet started operating, provide projected emissions. Section 7 - Non -Criteria Pollutant Emissions Information Are the total uncontrolled actual emissions of any non -criteria pollutant (e.g. HAP - hazardous air pollutant), from all venting activities/events reported on this APEN, • Yes ■ No equal to or greater than 250 lbs/year? If yes, use the following table to report the total combined non -criteria pollutant (HAP) emissions from all venting activities/events reported on this APEN: Chemical Name Abstract (CAS) Chemical Number Service Actual Annual Emissions Uncontrolled (lbs/year) Emissions Controlled (lbs/year) Emissions10 Benzene 71432 741.21 29.65 Toluene 108883 680.57 27.22 Ethylbenzene 100414 673.83 26.95 Xylene 1330207 673.83 26.95 n -Hexane 110543 5,916.21 236.65 2, 2,4-Trimethylpentane 540841 673.83 26.95 Methanol 107018 1,010.74 40.43 10 Annual emission fees will be based on actual controlled emissions reported. If source has not yet started operating, provide projected emissions. Form APCD-213 - Routine or Predictable Gas Venting APEN - Revision 01/2024 CC.% COLORADO Department of Public Health & Environment Permit Number: AIRS ID Number: [Leave blank unless APCD has already assigned a permit # and AIRS ID] Section 8 - Applicant Certification I hereby certify that all information contained herein and information submitted with this application is complete, true, and correct. If this is a registration for coverage under General Permit GP11, I further certify that this source is and will be operated in full compliance with each condition of General Permit GP11. 02/28/2025 Signature of Legally Authorized Person (not a vendor or consultant) Date Mason Martin Environmental Engineer Name (print) Title Check the appropriate box to request a copy of the: Draft permit prior to issuance Draft permit prior to public notice El El (Checking any of these boxes may result in an increased fee and/or processing time) This emission notice is valid for five (5) years. Submission of a revised APEN is required 30 days prior to expiration of the five year term, or when a reportable change is made (significant emissions increase, increase production, new equipment, change in fuel type, etc.). See Regulation No. 3, Part A, II.C. for revised APEN requirements. Send this form along with $242.00 and the General Permit registration fee of $756.00, if applicable, to: Colorado Department of Public Health and Environment Air Pollution Control Division APCD-SS-B1 4300 Cherry Creek Drive South Denver, CO 80246-1530 For more information or assistance, contact: Small Business Assistance Program cdphe_apcd_sbap@state.co.us APCD Main Phone Number (303) 692-3100 Make check payable to: Colorado Department of Public Health and Environment Alternatively, payment can be provided online, by credit card or electronic check, via the APCD Payment Portal. Form APCD-213 - Routine or Predictable Gas Venting APEN - Revision 01/2024 51 dam, COLORADO V ' Department of Public Health & Environment 3. ATTACHMENT C 3.1 Emission Calculations and Supporting Documentation DCP Operating Company, LP / Goldeneye Compressor Station Trinity Consultants 3-1 3.1.1 ROPE — Summary Tables and Gas Analyses; DCP Operating Company, LP / Goldeneye Compressor Station Trinity Consultants 3-2 FACILITY ROPE SUMMARY DCP Operating Company, LP Routine or Predictable Equipment Venting - Reg 7 Categories Summary Reg 7 Equipment Process Limits Emission Limits Categoryl,2 Vented Volume Thief Hatch Releases VOC Benzene Toluene Ethylbenzene Xylenes n -Hexane 2,2,4-TMP Methanol CO2 Methane Ethane CO2e Mscf/yr events/yr tpy lb/yr tpy Compressor 415.56 -- 7.85 32.56 29.89 29.60 29.60 259.87 29.60 44.40 0.47 5.28 2.71 132.40 Pig Units 354.21 -- 6.69 27.75 25.48 25.23 25.23 221.49 25.23 37.84 0.40 4.50 2.31 112.86 Other 51.46 -- 0.97 4.03 3.70 3.67 3.67 32.18 3.67 5.50 0.06 0.65 0.34 16.40 Total ROPE (AIRS -Specific) 821.23 0 15.51 64.34 59.07 58.49 58.49 513.54 58.49 87.73 0.93 10.43 5.35 261.65 1 ROPE Emissions for each of the listed Reg 7 categories are calculated on a volumetric basis except thief hatch release emissions. Emissions from thief hatch releases based on derived lb/event emission factors. 2 ROPE Sources in the Compressor and Other categories with internal volumes < 50 acf are listed on the APEN/ Permit exempt equipment list for this facility VOC and HAP Emission Factors Vented Gas Profile Emission Factors (lb/Mscf)3 VOC Benzene Toluene Ethylbenzene Xylenes n -Hexane 2,2,4-TMP Methanol CO2 Methane Ethane CO2e Inlet 37.78 0.08 0.07 0.07 0.07 0.63 0.07 0.11 2.26 25.40 13.04 637.20 Fuel Gas 11.04 0.05 0.05 0.05 0.05 0.44 0.05 0.07 3.02 31.08 9.85 780.07 3 lb/Mscf emission factors = speciated emissions (tpy) * 2000 lb/ton * 1 / vented volume (Mscf/yr) Routine or Predictable Equipment Venting - Extended Gas Analyses Summary Vented Gas Profile4 Sample Date Sample Location wt% MW VOC Benzene Toluene Ethylbenzene Xylenes n -Hexane 2,2,4-TMP Methanol CO2 Methane Ethane Gas Inlet 8/31/2022 Goldeneye Inlet A 53.04% 0.11% 0.10% 0.10% 0.10% 0.88% 0.10% 0.15% d 3.18% 35.66% 18.31% 26.99 Fuel Gas 2/14/2023 ROGGEN RESIDUE GAS FUEL PLANT GAS 22.22% 0.11% 0.10% 0.10% 0.10% 0.88% 0.10% 0.15% 6.08% 62.55% 19.81% 18.83 4 Inlet VOC and HAP wt% values are buffered to account for future variations in the VOC and HAP content of this stream. Page 1 of ROPE Gas Profile Summary DCP Operating Company, LP PROFILE SAMPLE DATE SAMPLE LOCATION Gas MW Component wt% Values' VOC Benzene Toluene Ethylbenzene Xylenes n -Hexane 2,2,4-TMP Methanol CO2 Methane Ethane Inlet 8/31/2022 Goldeneye Inlets"2 26.99 53.04% 0.11% 0.10% 0.10% 0.10% 0.88% 0.10% 0.15% 3.18% 35.66% 18.31% Fuel Gas 2/14/2023 ROGGEN GAS PLANT RESIDUE FUEL GAS 18.83 22.22% 0.11% 0.10% 0.10% 0.10% 0.88% 0.10% 0.15% 6.08% 62.55% 19.81% 1 DCP has conservatively buffered the VOC and HAP wt% values of the utilized representative inlet gas sample, to account for future variations in this speciation. 2 DCP considers the underlying sample referenced as Goldeneye Inlet to be Confidential Business Information (CBI). As such, the sample itself is not included in this application. 3.1.2 ROPE — Notes / Footnotes; DCP Operating Company, LP / Goldeneye Compressor Station Trinity Consultants 3-3 ROPE Notes - Methodologies DCP Operating Company, LP Routine or Predictable Equipment Venting - Calculation Methodologies 1 Blowdowns (Compressors, Other Equipment) a Unique physical volume between isolation valves (acf) determined via engineering measurements Note: Listed internal volume (acf) represents individual equipment volumes Note: Equipment volumes in the "other" category further buffered to conservatively account for piping volumes b Emitted volume (scf) calculated using Equation W -14A, as specified in PS -Memo 20-04 Note: Purge factor "C conservatively assumed to be 0 for all equipment blowdowns c Mass of uncontrolled emissions (Ib/yr) calculated using Equation 10.4-3, as specified in PS -Memo 20-04 Note: Please see table of vented gas profiles below for pollutant wt% values and emission factors 2 Equipment Startup Purge (Compressors, Other Equipment) a Unique physical volume between isolation valves (acf) determined via engineering measurements Note: Listed total volume (acf) represents sum of all equipment volumes multiplied by number of expected purge events/yr b Emitted volume (scf) calculated using Equation W -14A, as specified in PS -Memo 20-04 Note: Listed total expressed volume (scf) represents sum of all equipment purging/yr c Mass of uncontrolled emissions (Ib/yr) calculated using Equation 10.4-3, as specified in PS -Memo 20-04 Note: Please see Equipment Purging table for a breakdown of equipment -specific purge emissions Calculations of Emitted Volume Calculations conducted per Equation W -14A in APCD PS Memo 20-04: Unique physical volume between isolation values estimated using engineering measurements Vented Volume: N * [V (cuft)*[ (459.67+Ts) * (Pa + 14.73) / (459.67+Ta) / Ps ] - V * C] V = Unique physical volume between isolation valves C = Purge Factor (assumed zero to provide conservative emission estimates) Ts = Standard Temperature, 60 deg F Ta = Actual Temperature Ps = Standard Pressure, 14.7 psia Pa = Actual Pressure N = Number of blowdown events for each activity per year Converting emitted volume to mass Calculations conducted per Equation 10.4-3 in APCD PS Memo 20-04: Annual Vented Gas per Activity (scf/yr) = Vented Volume (scf/event) * Estimated Events per Year Total Vented Gas per Year (Ib/yr) = scf/yr * 1 lb-mol / 379 scf * MW of Vented Gas (lb / Ib- mol) VOC/HAP Speciation (Ib/yr) = Total Vented Gas (Ib/yr) * VOC/HAP wt% VOC/HAP Emission Factors (lb/scf) = VOC/HAP Emissions (Ib/yr) / Total Vented Gas (scf/yr) Page 1of1 ROPE Notes - Footnotes DCP Operating Company, LP 1- Equipment Internal Physical Volume (acf) estimated as a unique physical volume between isolation valves for each piece of listed equipment. Underlying equipment and piping dimensions available upon request. Actual numbers may vary upon construction of this facility. 2 - Number of annual blowdown and purge ROPE events estimated based on engineering evaluations, and similar ROPE analyses conducted at other DCP owned facilities. Actual numbers may vary upon construction of this facility. 3 - Starting inventory calculations represent the baseline entrained volume in each ROPE source at standard operating conditions, multiplied by the number of expected blowdown events in a given year. This represents the pre- capture/recovery or flaring control volume for each source of ROPE emissions at the facility Note: Equipment operating pressures determined from engineering evaluation. Note: Equipment operating temperatures conservatively estimated at 30 deg F. 4 - The final releases to atmosphere are calculated based on the final pre -vent pressures and temperatures of each ROPE source. Pre -vent pressures are determined by the capture/recovery/control procedures for each source of ROPE emissions. These include pre -vent pressure reductions via onsite closed vent systems. Note: Pre -vent temperatures conservatively estimated at 30 deg F for all ROPE sources. 5 - Startup Oz purge releases to atmosphere are based on pressures, temperatures, and a number of descrete stages for each ROPE source, all determined from engineering evaluations at the facility. Please see the next page for more details on specific purge procedures at this facility. Note: Purge temperatures conservatively estimated at 30 deg F for all ROPE sources. 6 - This section covers the existing and proposed methods of reducing blowdown releases to atmosphere at this facility. The notes under "Atmospheric Venting" and "Capture/Recovery indicate the pathways that blowdown vapors from various ROPE sources at this faciltiy will take, in support of the final pressures utilized for the atmospheric release calculations described above. The Procedure Status column indicates whether the described procedures are existing or newly proposed to meet Reg 7 requirements. 7 - Captured / recovered blowdown volumes are calculated from the starting inventory conditions and a final post -recovery pressure for each ROPE source. These calculated volumes represent volumes of potential blowdown vapors that are instead captured and recovered to the process, reducing final releases to atmosphere. Note: All temperatures conservatively estimated at 30 deg F for all ROPE sources. Page 1 of 1 3.1.3 Reciprocating Compressor Rod Packing Vent Emissions; DCP Operating Company, LP / Goldeneye Compressor Station Trinity Consultants 3-4 Rod Packing I Seal Gas Venting DCP Operating Company, LP AGGREGATED ROPE Emissions Rod Packing Vents VOC 7.15 tpy Benzene 741.21 lb/yr Toluene 680.57 lb/yr Ethylbenzene 673.83 lb/yr Xylenes 673.83 lb/yr n -Hexane 5,916.21 lb/yr 2,2,4 - TMP 673.83 lb/yr Methanol 1,010.74 lb/yr CO2 10.71 tpy Methane 120.14 tpy Ethane 61.68 tpy CO2e 3,014.22 tpy Rod Packing / Seal Gas Venting DCP Operating Company, LP ATMOSPHERIC ROPE EMISSIONS Gas Profile Data VOC / HAP Data GHG Data Equipment Description Equipment ID Equipment Category Vented Gas Profile Gas MW VOC Benzene Toluene Ethylbenzene Xylenes n -Hexane 2'2'4 TMP Methanol CO2 Methane Ethane Ib/Ib-mol wt% wt% wt% wt% wt% wt% wt% wt% wt% wt% wt% Inlet Compressor RPV #1 TBD RPV 1 Rod Packing Vents Inlet 26.99 53.04% 0.11% 0.10% 0.10% 0.10% 0.88% 0.10% 0.15% 3.18% 35.66% 18.31% Inlet Compressor RPV #2 TBD RPV 2 Rod Packing Vents Inlet 26.99 53.04% 0.11% 0.10% 0.10% 0.10% 0.88% 0.10% 0.15% 3.18% 35.66% 18.31% Inlet Compressor RPV #3 TBD RPV 3 Rod Packing Vents Inlet 26.99 53.04% 0.11% 0.10% 0.10% 0.10% 0.88% 0.10% 0.15% 3.18% 35.66% 18.31% Totals Rod Packing / Seal Gas Venting DCP Operating Company, LP ATMOSPHERIC ROPE EMISSIONS TOTAL FLOW TOTAL FLOW to ATM Equipment Description Equipment ID Equipment Category Starting Inventory Venting to Atm. scfm lb-mol / yr lb / yr Recovery DT scfm lb-mol / yr lb / yr Inlet Compressor RPV #1 TBD RPV 1 Rod Packing Vents 6.00 8,320.84 224,609.49 4.00% 0.24 332.83 8,984.38 Inlet Compressor RPV #2 TBD RPV 2 Rod Packing Vents 6.00 8,320.84 224,609.49 4.00% 0.24 332.83 8,984.38 Inlet Compressor RPV #3 TBD RPV 3 Rod Packing Vents 6.00 8,320.84 224,609.49 4.00% 0.24 332.83 8,984.38 Totals 48.00 66,566.75 673,828.48 1.32 1,830.59 26,953.14 Rod Packing / Seal Gas Venting DCP Operating Company, LP ATMOSPHERIC ROPE EMISSIONS Pre -Recovery Emissions SPECIATED EMISSION CALCULATIONS - VOC / HAPs Equipment Description Equipment ID Equipment Category VOC Benzene Toluene Ethylbenzene Xylenes n -Hexane 2,2,4-TMP Methanol lb/Mscf tons/yr lb/Mscf lb/yr lb/Mscf lb/yr lb/Mscf lb/yr lb/Mscf lb/yr lb/Mscf lb/yr lb/Mscf lb/yr lb/Mscf lb/yr Inlet Compressor RPV #1 TBD RPV 1 Rod Packing Vents 37.78 59.57 0.08 247.07 0.07 226.86 0.07 224.61 0.07 224.61 0.63 1,972.07 0.07 224.61 0.11 336.91 Inlet Compressor RPV #2 TBD RPV 2 Rod Packing Vents 37.78 59.57 0.08 247.07 0.07 226.86 0.07 224.61 0.07 224.61 0.63 1,972.07 0.07 224.61 0.11 336.91 Inlet Compressor RPV #3 TBD RPV 3 Rod Packing Vents 37.78 59.57 0.08 247.07 0.07 226.86 0.07 224.61 0.07 224.61 0.63 1,972.07 0.07 224.61 0.11 336.91 Totals 178.70 741.21 680.57 673.83 673.83 5,916.21 673.83 1,010.74 Rod Packing / Seal Gas Venting DCP Operating Company, LP ATMOSPHERIC ROPE EMISSIONS Equipment Description Equipment ID Equipment Category Inlet Compressor RPV #1 TBD RPV 1 Rod Packing Vents Inlet Compressor RPV #2 TBD RPV 2 Rod Packing Vents Inlet Compressor RPV #3 TBD RPV 3 Rod Packing Vents Totals Post -Recovery Atmospheric Emissions (Downtime) SPECIATED EMISSION CALCULATIONS - VOC / HAPs VOC Benzene Toluene Ethylbenzene Xylenes n -Hexane 2,2,4-TMP Methanol lb/Mscf tons/yr lb/Mscf lb/yr lb/Mscf lb/yr lb/Mscf lb/yr lb/Mscf lb/yr lb/Mscf lb/yr lb/Mscf lb/yr lb/Mscf lb/yr 1.51 2.38 0.00 9.88 0.00 9.07 0.00 8.98 0.00 8.98 0.03 78.88 0.00 8.98 0.00 13.48 1.51 2.38 0.00 9.88 0.00 9.07 0.00 8.98 0.00 8.98 0.03 78.88 0.00 8.98 0.00 13.48 1.51 2.38 0.00 9.88 0.00 9.07 0.00 8.98 0.00 8.98 0.03 78.88 0.00 8.98 0.00 13.48 7.15 29.65 27.22 26.95 26.95 236.65 26.95 40.43 3.1.4 List of APEN and Permit Exempt Activities DCP Operating Company, LP / Goldeneye Compressor Station Trinity Consultants 3-5 INSIGNIFICANT ACTIVITY LIST DCP Operating Company, LP Insignificant Acitivities NOx (tpy) CO (tpy) VOC (tpy) Benzene (Ib/yr) n -Hexane (Ib/yr) Emission Estimation Method Insignificant Per Facilitywide Fugitive Emissions -- -- 0.86 5.52 44.04 Protocol for Equipment Leak Emission Estimates" EPA Publication No. 453\R-95-017, Table 2-8 Regulation No. 3, Part A, Section II.D.1.a Lube Oil Storage Tanks -- -- Neg. Neg. Neg. N/A Regulation No. 3, Part A, Section II.D.1.aaa Insignificant ROPE (< 50 act) -- -- 0.04 0.16 1.25 CDPHE PS Memo 20-04 CDPHE PS Memo 20-04 Electric Compressor Distance Piece Venting -- -- 0.14 0.56 4.48 Protocol for Equipment Leak Emission Estimates" EPA Publication No. 4531R-95-017, Table 2-8 Regulation No. 3, Part A, Section II.D.1.a Total Insignificant Emissions: 0.00 0.00 1.04 6.24 49.77 Page 1 of 1 4. ATTACHMENT D 4.1 Form APCD-101 (Company Contact Information Form) DCP Operating Company, LP / Goldeneye Compressor Station Trinity Consultants 4-1 Form APCD-101 Company Name: Source Name: COLORADO Department of Public Health & Environment Company Contact Information Form Ver. September 10, 2008 DCP Operating Company, LP Goldeneye Compressor Station Permit Mason Martin Contact �: . Address: 3026 4th Ave Street Greeley CO 80631 City State Zip Phone Number: 970-502-7323 Fax Number: mason.j.martin@p66.com E-mail: Billing Contact: Mason Martin (Permit Fees)3 Address: See Permit Contact Street City State Zip Phone Number: Fax Number: E-mail: Compliance Contact 2. : Josh Wiest Address: 3026 4th Avenue Street Greeley CO 80631 City State Zip Phone Number: 970-570-7345 Fax Number: E-mail: Joshua.T.Wiest@p66.com Billing Contact: Patricia Grajeda de Babb (Annual 4 Fees) Address: 3026 4th Ave Street Greeley CO 80631 City State Zip Phone Number: 575-802-5228 Fax Number: E-mail: Patricia.GrajedaDeBabb@p66.com Check how would you like to receive your permit fee invoice? Mail: E-mail: • Fax: Footnotes: ' The permit contact should be the point of contact for technical information contained in the permit application. This may be a company representative or a consultant. 2 The compliance contact should be the point of contact for discussing inspection and compliance at the permitted facility. 3 The billing contact (Permit fees) should be the point of contact that should receive the invoice for fees associated with processing the permit application & issuing the permit. (Reg. 3, Part A, Section VI.B) 4 The billing contact (Annual fees) should be the point of contact that should receive the invoices issued on an annual basis for fees associated with actual emissions reported on APENs for the facility. (Reg. 3, Part A, Section VI.C) Page 1 of 1 AP_Forn-APCD-101-Company-Contact-Information (2).doc 5. ATTACHMENT E 5.1 Environmental Justice Documentation DCP Operating Company, LP / Goldeneye Compressor Station Trinity Consultants 5-1 e Home (/AirPollutionControlDivision/s/) DETAILS RELATED Submit to APCD (/AirPollutionControlDivision/s/apcd-forms) My Submitted Forms (/AirPollutionControlDivision/s/APC Company Information Company Name Trinity Consultants Contact Person Christopher Platt Customer Number ID Facility Name OxyBronco Compressor Station Permit/Exemption Number Application Details Environmental Justice Name EJ-00000659 Previous APCD Letter or Permit? No 0 Address Billing Address 1999 Broadway Suite 820 Denver, Colorado 80202 United States CENTRAL BUSINESS (https://www.google.com/maps? q=1999%20Broadway%20Suite%20820%0ADenver%2C%20Colorado%2080 202%0AUnited%20States) Application Date 2/7/2025 Application Status EJ Summary Verified EJ Verification Date 2/14/2025 EJ Verification Number 85952141 Air Permit Type Construction Permit Facility's Census Block Group(s) 0 081230025022 Mailing Address 3026 4th Ave Greeley, Colorado 80631 United States Facility LAT 40.19059 (https://www.google.com/maps? q=3026%204th%20Ave%0AGreeley%2C%20Colorado%2080631%0AUni ted%20States)_ Facility Location Address Colorado United States thttps://www.google.com/maps?q=Colorado%0AUnited%20States) Facility LONG -104.46037 Environmental Justice Requirements Affected Construction Source? No Located in a DI Community? 0 Yes DI Community Type 0 Socioeconomically Vulnerable (SV) Community Description of Proposed Permit Application Affected Pollutants 0 Volatile organic compounds (VOCs);Benzene;Toluene;Ethylbenzene;Xylene Proposed Permit Application Description 0 DCP is proposing installation of a new electric compressor station, the OxyBronco Compressor Station, in Weld County Colorado. The only emissions at this facility will be associated with equipment ROPE and electric compressor rod packing (VOC / HAPs) Emission Reduction Strategies 0 The current facility design minimizes emissions, with no onsite combustion, electric compressor engines, and no onsite atmospheric storage tanks. No further reductions are practicable for the proposed facility. Public Outreach Enhanced Community Outreach 0 Planned, in progress, or to be determined Summary of Community Outreach 0 Fair Treatment Measures 0 Part 1: Know the audience, community, and purpose Residents notified within 1 mile? Coordinated organizations/individuals? Other Additional information about audience 0 Engineer Comment Disproportionate Emission Increase 0 Mitigation Measures/Changes Description 0 Community Engagement -Based Changes 0 Part 2: Host public meetings at various times and days Meeting date(s): Meeting time(s): Meeting type Meeting location(s) Number of registered participants Number participants/community members 2. Meeting date 2. Meeting time 2. Meeting type 2. Meeting location 2. Meeting registered participants 2. Meeting public participants Part 3: Host public meeting(s) in locations that are safe and accessible Did you choose locations that were Other The location was accessible by Other Published publicly accessible website? Link to the Website Did you use a facilitator? Information about accessible meeting Part 4: Provide at least 30 days' notice ahead of public meetings 30 days' notice? At least one reminder? Part 5: Actively promote outreach and public participation opportunities Communication tactics used? Other Communication in multiple languages? List the languages used in communication Attended events with trusted partners? Additional information about meeting Part 6: Ensure language justice, cultural competency, and accessibility Interpretation services provided? Who provided interpretation? Translated into multiple languages? Who provided the translation? Digital accessibility practices used? Information about accessibility Part 7: Provide various and accessible methods for receiving public feedback Opportunities/Platforms were provided? Other Number of comments received in writing Number of comments received verbally How did you review public feedback? Information about public comments Part 8: Reduce barriers to participation via participation stipends Provided for public meeting attendees Other Included in the public meeting Other Short description of the activities 6. ATTACHMENT H 6.1 Form APCD-102 (Facility Wide Emission Inventory) DCP Operating Company, LP / Goldeneye Compressor Station Trinity Consultants 6-1 Form APCD-102 Company Name: DCP Operating Company, LP Source Name: Goldeneye Compressor Station Source AIRS ID: TBD Colorado Department of Public Health and Environment Air Pollution Control Division Facility Wide Emissions Inventory Form Ver. April, 2015 Uncontrolled Potential to Emit (PTE) Controlled Potential to Emit (PTE) Criteria (TPY) I HAPs (lbs/yr) Criteria (TPY) I HAPs (Ibs/yr) AIRS ID Equipment Description TSP PMIO PM2.5 SO2 NOx VOC Co I HCHO Acetal Acro BZ Tol EB Xyl n -Hex Meth 224-TMP TSP PMIO PM2.5 SO2 NOx VOC CO I HCHO Metal Acro BZ Tol EB Xyl n -Hex Meth 224-TMP TBD ROPE - Blowdowns/Purge 15.51 -- I -- -- -- 64 59 58 58 514 88 58 -- -- -- -- -- 15.51 -- I -- -- -- 64 59 58 58 514 88 58 TBD ROPE - Compressor Rod Packing Venting -- -- -- -- -- 178.70 -- -- -- -- 741 681 674 674 5,916 1,011 674 -- -- -- -- -- 7.15 -- -- -- -- 30 27 27 27 237 40 27 I I Permitted Sources Subtotal = 0.0 UA 0.0 0.0 0.0 194.2 0.0 0 0 0 806 740 732 732 6,430 1,098 732 0.0 0.0 0.0 0.0 0.0 22.7 0.0 0 0 0 94 86 85 85 750 128 85 APEN Only - Permit Exempt Sources I I --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- - --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- I --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- I --- --- --- --- --- --- --- --- --- --- APEN Only Subtotal = 0.0 0.0 0.0 0.0 0.0 0.0 0.0 I I 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 I I 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 APEN Exempt / Insignificant sources N/A Insignificant Activities --- --- --- --- 0.00 1.04 0.00 I --- --- --- 6 -- -- -- 50 -- -- --- --- --- --- 0.00 1.04 0.00 I --- --- --- 6 -- -- -- 50 -- -- I I I I I Insignificant Subtotal = 0.0 0.0 0.0 0.0 0.0 1.0 0.0 I 0 0 0 6 0 0 0 50 0 0 0.0 0.0 0.0 0.0 0.0 1.0 0.0 I 0 0 0 6 0 0 0 50 0 0 Total, All Sources = I 0.0 0.0 0.0 0.0 0.0 195.2 0.0 I 0 0 0 812 740 732 732 6,480 1,098 732 1 0.0 0.0 0.0 0.0 0.0 23.7 0.0 I 0 0 0 100 86 85 85 800 128 85 Uncontrolled HAPs Summary (TPY) = 0.0 0.0 0.0 0.4 0.4 0.4 0.4 3.2 0.5 0.4 Controlled HAPs Summary (TPY) =I 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.4 0.1 0.0 Uncontrolled Total, All HAPs (TPY) _I 5.7 I Controlled Total, All HA Ps (TPY)=I 0.7 I Footnotes: 1. This form should be completed to include both existing sources and all proposed new or modifications t 2. If the emissions source is new then enter "proposed" under the Permit No. and AIRS ID data columns 3. HAP abbreviations include: BZ = Benzene Tol = Toluene EB = Ethylbenzene Xy1 = Xylene HCHO = Formaldehyde 4. APEN Exempt/Insignificant Sources should be included when warranted. o existing emissions sources 224-TMP = 2,2,4-Trimethylpentane Metal = Acetaldehyde Acro = Acrolein n -Hex = n -Hexane Meth = Methanol DCP Operating Company, LP 2/27/2025 7. ATTACHMENT I 7.1 Process Description and Facility Information 7.1.1 Process Description Goldeneye Compressor Station will take low pressure natural gas and compress it to pipeline pressures prior to sending it down the line for further processing. Natural gas will enter the station through an inlet slug catcher where liquids are removed. Liquids will then be piped offsite for further processing and storage. After the inlet slug catcher, natural gas will be compressed via three (3) Spanker compressors driven by electric drive motors (EDMs). The compressed gas will then be sent into the pipeline system for further processing. Facility Maintenance Routine or predictable emissions (ID: ROPE Venting) will occur for equipment at this facility. Blowdown procedures for high -volume equipment at this facility typically involve drawing down pressures via the facility blowdown header, with remaining volumes vented to atmosphere. The rod packing vents on the reciprocating compressor units at this facility vent at a variable rate, based primarily on the type of rod packing installed, coupled with the condition of the rod packing which degrades over time. The profile of the vented gas from these units is inlet gas at this facility. DCP utilizes a system for recovery of these vapors back to the facility inlet with a collection efficiency of 100%. DCP conservatively estimates that this system may experience up to 2% annual downtime, during which times rod packing vapors instead vent to atmosphere. DCP Operating Company, LP / Goldeneye Compressor Station Trinity Consultants 7-1 7.2 Process Flow Diagram DCP Operating Company, LP / Goldeneye Compressor Station Trinity Consultants 7-2 Inlet Gas � i Inlet Slug Catcher Liquids � 1 Pipeline (off -site storage) J Process Flow Diagram Goldeneye Compressor Station DCP Operating Company, LP Gas Three (3) -) Electric Reciprocating c Engines Compressed Gas cirscirl Trinity, Midstream. consultants Pipeline9 S28, T3N, R63W 40.19, -104.4508 February 2025 7.3 Plot Plan DCP Operating Company, LP / Goldeneye Compressor Station Trinity Consultants 7-3 8. ATTACHMENT K Regulatory Analysis This section addresses the applicability of the federal and state regulatory programs for the sources covered in this application. 8.1.1 Colorado State Regulations 8,1,1.1 CDPHEAPCD Regulation 1: Part A, Section ILA.1 Smoke and Opacity Requirements for Stationary Sources Regulation 1, Part A describes that all new sources are limited to emissions with a maximum opacity of 20% except during periods of startup and shutdown. DCP will comply with this standard. 8,1,1,2 CDPHE APCD Regulation 2: Odor Emission Regulation 2 describes that all sources are subject to the general odor emission provisions detailed in Colorado Regulation 2. DCP will comply with this standard. 8.1,1,3 CDPHE APCD Regulation 3, Parts A and B DCP is providing Air Pollution Emission Notice (APEN) forms for the aggregate ROPE venting source and reciprocating compressor rod packing vents included in this application. This facility is subject to the construction permitting requirements under Regulation 3, Part B and this application serves to be an initial application for a construction permit to include authorization for these new AIRS points. Note that some sources at this facility are exempt from obtaining an APEN and are also exempt from construction permit requirements. A list of such activities can be found under the Insignificant Activity list as a part of the emission calculations included under Attachment C of this application. Goldeneye is located in a non -attainment area for ozone. Therefore, the facility sources utilize Reasonable Achievable Control Technology (RACY) to minimize NOx and VOC emissions. The following table summarizes RACT for the sources included in this permit application: Table K-1. RACT for Sources at Goldeneye Equipment Facility ID AIRS Point Applicability RACT FUG Exempt VOC requirements stations LDAR the Fugitive LDAR under provisions requirements emissions for well Colorado constitute production at this Regulation detailed RACT facility facilities in for 7, NSPS fugitive are Part subject and Subpart D, natural component Section 0000b. the gas I.L. LDAR compressor as emissions. These well as to Ventin Venting ROPE TBD VOC Regulation g lation 7, Part D, Section ILK . Capture/Recovery Requirements. Rod Venting Packin g VOC Rod to Packing process constitutes Venting per the from requirements RACT the for rod electric packing of compressors NSPS venting Subpart at this will 0000b. be facility. recovered Y This TBD DCP Operating Company, LP / Goldeneye Compressor Station Trinity Consultants As required by Regulation 3 Part B, Section III.B.5., an environmental justice summary was submitted for this facility (see Attachment E)1. This facility, based on its proposed location within a Disproportionately Impacted (DI) Community, is potentially subject to the community monitoring provisions under Regulation 3, Part B, Section III.J. Specifically, any source of "Affected Pollutants" submitting a permit application after July 15, 2024 is subject to provisions under Sections III.3.2., III.3.4, and IILJ.5. The provisions of III.3.3. apply to sources of "Affected Pollutants" submitting a permit application after October 15, 2024. This facility will be a source of VOC in addition to BTEX pollutants, all of which are considered "Affected Pollutants" per the definition listed under Regulation 3, Part A, Section I.B.5. The source -specific monitoring provisions of Section III.3.2. apply for each affected pollutant modeled per the requirements of Regulation 3, Part B, Section III.B.4., which require dispersion modeling for projects being permitted by the "Affected Construction Source" located in a Cumulatively Impacted (CI) Community. However, dispersion modeling under Section III.B.4. is only required for "Affected Pollutants" for which the source is an "Affected Construction Source." A new source is only considered an "Affected Construction Source" if proposed emissions exceed the Significant Rates of Emissions defined under Regulation 3, Part A, Section I. B.49 (for all pollutants other than BTEX), and if estimated annual actual emissions of BTEX exceed 2 tons/yr of any individual BTEX component, or 5 tons/yr in aggregate. The potential VOC emissions estimated for this facility are less than 25 tons/yr and estimated actual emissions of BTEX are below both the individual and aggregate thresholds. As such, this facility does not meet the definition of "Affected Construction Source," and the source -specific monitoring provisions under Regulation 3, Part B, Section III.3.2. do not apply to this facility as a result. This facility is not considered a "well production facility" and the source -specific monitoring requirements under Regulation 3, Part B, Section III.3.4. do not apply to this facility as a result. This facility does not propose use of general permitting, and the monitoring requirements detailed under Regulation 3, Part B, Section III.3.5. do not apply to this facility as a result. The final requirements detailed under this section are specified under Regulation 3, Part B, Section III.J.3., and cover fee payments associated with new or modified sources of Affected Pollutants located in DI Communities that are not subject to source -specific monitoring requirements under Sections III.3.2 or III.3.4. This includes the proposed Goldeneye Compressor Station, which will be subject to fee payment requirements under this section as a result. The proposed facility includes emissions levels greater than APEN Reporting thresholds, but less than Affected Construction Source thresholds, as described above. Further, the proposed location for this facility is considered a "Socioeconomically Vulnerable" Community, per the submitted EJ Summary. As such, this facility is expected to be subject to a $50.00 fee, per the table under Section III.3.3. 1 Note that the submitted environmental justice summary referenced the previous name for the facility, "OxyBronco Comrpessor Station" instead of the current name "Goldeneye Compressor Station." However, the submitted EJ Summary reflects the proposed location for this facility, and all provided information is still considered accurate by DCP. DCP Operating Company, LP / Goldeneye Compressor Station Trinity Consultants 8.1.1.4 Concerning Operating Permits (Regulation 3, Part C) As shown in Attachment H of this application, Goldeneye will be a minor source of all pollutants with respect to the Title V program, and Operating Permit coverage will not be required as a result. 8.1.1.5 Concerning Major Stationary Source New Source Re view and Prevention of Significant Deterioration (Regulation 3, Part D) As shown in Attachment F, Goldeneye will be a minor source of all pollutants with respect to Nonattainment New Source Review (NANSR) and Prevention of Significant Deterioration (PSD) permitting, and as a stand- alone facility, will not be subject to NANSR or PSD permitting requirements. Due to the relationship between the proposed Goldeneye Compressor Station and the existing Enterprise Compressor Station facilities, DCP has evaluated the proposed facility from a source aggregation perspective. Consistent with EPA Source Determination Rule issued on May 12, 2016, a single stationary source under Regulation 3, Part D, Section I.B.52. is defined by three key factors: ® In the same industrial grouping (defined by standard industrial classification code, or "SIC code"); ® Under the control of the same person/people; Located on contiguous or adjacent properties. To be considered a single stationary source, the facilities in question must meet all three key factors. The Goldeneye facility shares a SIC code with the Enterprise Compressor Station and will be under control of the same company (i.e. DCP Operating Company, LP), so the first two source aggregation pillars are met. Thus, the evaluation comes down to an assessment of shared equipment and/or adjacency. The Goldeneye facility will send liquids generated from onsite natural gas compression and initial separation to the nearby Enterprise Compressor Station (AIRS ID 123-0077) for storage and removal. This means that the storage tanks at Enterprise could be considered shared equipment, for the purpose of this source aggregation evaluation. However, the facilities are not contiguous or adjacent as they are separated by more than a quarter mile apart. Thus, even with a degree of shared equipment between the two facilities, they do not meet the final pillar for this source aggregation evaluation, and the two facilities should not be considered a single source as a result. Based on these factors, DCP concludes that the Goldeneye facility and the Enterprise Compressor Station should be considered separate and distinct facilities and, therefore, should not be aggregated as a single stationary source under Regulation 3, Part D. 8.1.1, 6 CDPHE Regulation 7, Part B, Section I; Oil and Natural Gas Operations, Volatile Organic Compound Emissions from Oil and Gas Operations 8.1.1.6.1 Regulation 7, Part D, Section I.] Compressors Regulation 7, Part D, Sections I.3.1 and Section I.3.2 provide requirements for centrifugal and reciprocating compressors respectively. DCP will comply with the emission control, inspection, repair and recordkeeping provisions described in Regulation 7, Part D, Sections I.3.2.a. through I.J.2.d by complying with the monitoring, recordkeeping, and reporting requirements of NSPS 0000b as applicable. DCP Operating Company, LP / Goldeneye Compressor Station Trinity Consultants 8.1.1.6.2 Regulation 7, Part D, Section I.1 Natural Gas Compressor Station LDAR The fugitive component leaks at this facility are subject to the Leak Detection and Repair (LDAR) requirements detailed under this section, including quarterly inspections, repair and remonitoring, and recordkeeping requirements as applicable. 8,1,1,7 CDPHE Regulation 7: Control of Ozone via Ozone Precursors and Control of Hydrocarbons via Oil and Gas Emissions, Part D Oil and Natural Gas Operations, Section II (State Only) Statewide Controls for Oil and Gas Operations 8.1.1.7.1 Regulation 7, Part D, Section II.E Leak Detection and Repair The fugitive component leaks at this facility are subject to the Leak Detection and Repair (LDAR) requirements detailed under this section, including approved instrument monitoring methods (AIMM). DCP will comply with the requirements of this section as applicable. 8.1.1.7.2 CDPHE APCD Regulation 7: Part D, Section II. H Pigging and Blowdown Capture/ Recovery Routine or predictable emissions (ROPE) associated with maintenance blowdowns and pigging operations are subject to the capture and recovery requirements detailed under this section of Regulation 7. Goldeneye is located within a Disproportionately Impacted (DI) community per the submitted and approved O Summary. Therefore, DCP has evaluated the individual sources of ROPE emissions against the DI applicability thresholds detailed in Regulation 3, Part D, Section II.H.l.b. The anticipated list of ROPE sources subject to the capture/recovery requirements can be found in the Emission Calculations and Supporting Documentation section of this application (Attachment C). The Goldeneye Compressor Station will commence operation after February 14, 2022. Thus, the ROPE sources subject to capture/recovery in this application must be in compliance upon startup of the facility. DCP will comply with all applicable capture and recovery requirements detailed in section II.H.3. of this section of Regulation 7. As part of the design of this compressor station, DCP has evaluated various blowdown capture/recovery techniques for technical and economic feasibility and has developed a facility design with associated blowdown procedures that allow for drawing down equipment pressures to approximately 40 psig prior to venting to atmosphere. As such, DCP is able to maximize recovery of ROPE vapors, minimizing the final volume that must be released to atmosphere. Please see the included process description for details. In addition to the capture/recovery requirements detailed above, the ROPE sources at Goldeneye will be subject to the best management practices detailed in section II.H.4. upon startup. DCP will review and implement these BMPs, as applicable, per the requirements outlined in this section. DCP will conduct and maintain all recordkeeping surrounding ROPE activities as outlined under section II. H.5. of this section. DCP Operating Company, LP / Goldeneye Compressor Station Trinity Consultants 8.1.1.8 CDPHE Regulation 7: Control of Ozone via Ozone Precursors and Control of Hydrocarbons via Oil and Gas Emissions, Part D Oil and Natural Gas Operations, Section V (State Only) Oil and Natural Gas Operations Emissions Inventory Goldeneye will be subject to the annual actual emissions inventory reporting requirements detailed in this section. DCP will comply with maintaining the required source information per Section V.C and submit the annual actual emissions reports in the Division approved format as required by June 30th of each year. 8.1.2 New Source Performance Standards (NSPS) 8.1.2.1 Subpart A - General Provisions Any source subject to a source -specific NSPS is also subject to the general provisions of NSPS Subpart A. Unless specifically excluded by the source -specific NSPS, Subpart A generally requires initial construction notification, initial startup notification, performance tests, performance test date initial notification, general monitoring requirements, general recordkeeping requirements, and semiannual monitoring and/or excess emission reports. 8.1.2.2 40 CFR Part 60 Subpart OOOOb: Standards of Performance for Crude Oil and Natural Gas Facilities for Which Construction, Modification or Reconstruction Commenced After December 6, 2022 This subpart applies to affected sources that commenced construction, modification, or reconstruction after December 6, 2022. Goldeneye is classified as a compressor station constructed after the applicability date and potentially affected sources at the facility under this subpart include the reciprocating compressors and fugitive emission components. The facility's reciprocating compressors are affected sources as defined in §60.5365b(c) and are subject to the compliance and monitoring standards outlined in §60.5385b as applicable. DCP is proposing recovery of rod packing emissions back to the process and will comply with applicable closed vent system and cover requirements in support of the proposed rod packing recovery approach. The collection of fugitive emission components at the facility as defined in §60.5365b(i) will be considered as an affected facility. An initial leak detection and repair (LDAR) survey must be completed within 90 days of startup of production and subsequent AVO or OGI surveying methods are due bimonthly or quarterly respectively. DCP will comply with all applicable requirements within the required timelines. 8.1.3 National Emission Standards for Hazardous Air Pollutants There are no NESHAP requirements applicable to the equipment venting activities detailed in this permit application. DCP Operating Company, LP / Goldeneye Compressor Station Trinity Consultants 9. ATTACHMENT L 9.1 Compliance Demonstration Plan for Routine and Predictable Venting Emissions Compliance demonstration mechanisms are being presented for equipment included as part of this application that are present at the Goldeneye Compressor Station. This attachment reflects DCP's current understanding of the Division's expected compliance tracking conditions for ROPE sources at this facility. DCP Operating Company, LP / Goldeneye Compressor Station Trinity Consultants 9-1 Compliance Demonstration Plan for Routine and Predictable Venting Emissions Activity Type Compliance Records: Volume & Emission Calculations: Compliance Demonstration Methodology: Compressor & "Other" Equipment • Number of blowdown events (N) per piece of • Volume 04 Eqn • Emissions per W -14A per blowdown event (scf) based on PS Memo 20- blowdown event (lbs) based on PS Memo DCP will maintain a log of equipment blowdowns. Volumes and emissions from all blowdown events will be Shutdown Blowdowns summed together for rolling 12 -month purposes based on the established activity categories (compressors, pig equipment. units, "other" equipment). A monthly limit is not practicable for maintenance events that do not occur evenly • Final pressure (Pa) & temperature (Ta) throughout a year. Actual gas compositions from annual sampling events will be used in emission calculations differentials for depressurization event to 20-04 Eqn 10.4-3 in lieu of emission factors presented on the APEN. Types of gas compositions include: atmosphere. • Inlet • Representative (VOC and gas composition HAP content wt%) per equipment Compressor & "Other" Equipment • Number of purge events (N) per equipment. • Volume Eqn per W -14A purge event (scf) based on PS Memo 20-04 DCP will maintain a log of purges at this facility. Volumes and emissions from all purge events will be Startup Purging summed together for rolling 12 -month purposes. A monthly limit is not practicable for maintenance events • Representative (VOC and gas composition HAP content wt%) per equipment that do not occur evenly throughout a year. Actual gas compositions from annual sampling events will be used • Emissions per purge event (lbs) based on PS -Memo 20-04 in emission calculations in lieu of emission factors presented on the APEN. Types of gas compositions Eqn 10.4-3 include: • Inlet Reciprocating Vents Compressor Rod Packing • Hours of operation of the reciprocating • Constant determined volume of 1.5 from vendor scfm/cylinder/compressor information. unit DCP will maintain hours of operation of each reciprocating compressor, as well as hours downtime associated with the system utilized for recovery of these vapors. The emission factors provided in the APENs are based compressors • Hours of downtime of the system utilized for on a conservative on constant volume gas analysis in scfm, actual with additional hours of operation buffer or pure of each product compressor, details. Actual and hours emissions will be of recovery system based • Converted to R12 volume (MMscf/yr) using actual hours of recovery of rod packing vapors operation of each reciprocating compressor. downtime. Actual gas compositions from an annual sampling event will be used in emission calculations in • Volume to packing atmosphere volumes, coupled calculated with from hours uncontrolled of recovery rod system lieu of emission represented factors by inlet gas presented on the APEN. at this facility. Reciprocating compressors rod packing vents are best downtime. o Zero atmospheric emissions during recovery system uptime. • Emissions calculated according to PS -Memo 20-04 Eqn 10.4-3 atp Midstteam. Goldeneye Compressor Station Decommissioning Plan When the proposed Goldeneye Compressor Station reaches the end of its operational life, the components will be dismantled and removed from the site. DCP's lease with the property owner, Art Guttersen, requires us to decommission and restore the site at our expense. The decommissioning plan would commence at the end of the lease term, the planned lifetime of this facility is ten years. At the time of decommissioning, the proposed facility components will be dismantled and removed using minimal -impact construction equipment. All underground infrastructure that is not removed will be abandoned in place by industry standards, or standards set forth by Weld County. All materials will be safely recycled or disposed of at an approved disposal facility. DCP will be responsible for all decommissioning costs. Upon termination of the proposed facility, all equipment will be removed. The ground will be re- graded to match the surrounding contour of the land. Revegetation of the site will be considered complete when the percent plant cover reaches at least 80% of pre -disturbance vegetative cover and is free of noxious weeds. The pre -disturbance vegetation cover shall be determined by the undisturbed surrounding areas. DCP would also be willing to evaluate coordinating reclamation efforts with Weld County Extension, Public Works, and the Soil Conservation District. In addition to the required analysis of specific conditions to be addressed during the decommissioning process, particular focus will be placed on landowner coordination, including advance contact as necessary by rule or plan providing discussions regarding the process and addressing any concerns there may be. Preliminary Drainage Report Goldeneye Compressor Station Created for DCP Operating Company, L.P. dcp Midstteam. Weld Co Case Number: USR25-XXXX Project Number: B25.S&L.0001 Report Number: FDR 01 REV B Issue Date April 2025 ASCENT GFOMATJCS SOLUTIONS 8620 Wolff Court Westminster, CO 80031 303-928-7128 Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page i April 2025 REFERENCE CONTRACT This work has been conducted by Ascent Geomatic Solutions (Ascent) for DCP Operating Company, L.P. (DCP) under contract number B25.S&L.0001 — C01. This work has been performed under Ascent project number B25.S&L.0001. The DCP project manager for Goldeneye Compressor Station is Mr. Joel Sparks; Matt Parse is the project manager for Ascent. DOCUMENT REVISION HISTORY Rev Date Issued Prepared Reviewed Approved B 04/02/2025 Issued for Permit OS MS MS This report, and all associated materials, has been prepared by Ascent Geomatic Solutions for the exclusive use of DCP Operating Company, L.P. for Goldeneye Compressor Station. No other party is an intended beneficiary of this report or any of the information, opinions, and conclusions contained herein. The use of this report shall be at the sole risk of the user regardless of any fault or negligence of DCP Operating Company, L.P. or Ascent Geomatic Solutions. Ascent Geomatic Solutions accepts no responsibility for damages, if any, suffered by any third party as a result of decisions or actions based on this report. Note that this report is a controlled document and any reproductions are uncontrolled and may not be the most recent version. ASCENT GinWis SJIWiIntl`_, Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page ii April 2025 EXECUTIVE SUMMARY A drainage analysis was performed for the project site in accordance with the Weld County requirements for a preliminary drainage report. It was determined that a detention pond is required to maintain historic release rates off site. A grading and stormwater management system has been designed based on the hydrological analysis. The drainage system was designed to be phased. The design implements a detention pond during the construction phase. Once reclamation occurs the pond will service the site throughout its life. BMP practices will be utilized during the construction phase to ensure stormwater release from the site is in compliance with Weld County and State requirements. ASCENT GinWis SJIWiIntl`_, Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page iii April 2025 TABLE OF CONTENTS REFERENCE CONTRACT DOCUMENT REVISION HISTORY EXECUTIVE SUMMARY TABLE OF CONTENTS 1. INTRODUCTION AND PURPOSE 2. PROJECT DESCRIPTION AND BACKGROUND 3. DESIGN CRITERIA 4. DESIGN CONDITIONS 4.1 Existing Conditions 4.2 Proposed Conditions 4.2.1 Stormwater System Design i i ii iii 4 4 5 5 6 6 7 5. MAINTENANCE PLAN 9 6. SUMMARY AND CONCLUSIONS 11 Appendix A — REFERENCE DOCUMENTS, SOFTWARE AND WEBSITES A.1 Appendix B — ABBREVIATIONS AND ACRONYMS B.1 Appendix C DRAINAGE REPORT CHECKLIST C.1 Appendix D — VICINITY MAP Appendix E — FEMA MAP Appendix F — NOAA ATLAS 14 PRECIPITATION FREQUENCY TABLE Appendix G — NRCS SOILS DATA Appendix H — GROUND SURFACE IMPERVIOUS CALCULATIONS Appendix I — HYDROLOGIC CALCULATIONS D.1 E.1 F.1 G.1 H.7 1.1 Appendix J — DETENTION / WQCV CALCULATIONS J.1 Appendix K — DRAINAGE DRAWINGS K.11 ASCENT OEOMATICS Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page 4 April 2025 1. INTRODUCTION AND PURPOSE DCP Operating Company, L.P. (DCP) is constructing a new compressor site in Weld County, Colorado. The project is referred to as the Goldeneye Compressor Station. As part of the project, a compressor pad, and temporary laydown area will need to be constructed. Ascent Geomatic Solutions (Ascent) has been contracted to perform the grading, drainage analysis and drainage report for the Goldeneye Compressor Station. This report presents the findings and recommendations for the grading and stormwater management for the project. 2. PROJECT DESCRIPTION AND BACKGROUND The Goldeneye Compressor Station is located in the Southwest quarter of the Southwest quarter of Section 28, Township 3 North, Range 63 West of the 6th Principal Meridian in Weld County, Colorado'. Figure 1 shows an aerial photo of the project site location. A vicinity map showing the project location relative to the surrounding area can be found in Appendix D. Figure 1: Aerial of Project Location 1 The project site is located at latitude: 40.190609° N, longitude: -104.450713° W. f\ ASCENT CJOM HC Sill iiIllr Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page 5 April 2025 The proposed compressor station is located on a 35 -acre site which is a portion of a 640 -acre parcel owned by Gutterson Ranches, LLC. and resides at a mean elevation of 4,830 ft. amsl. The site is located approximately 2 miles east of Weld County Road 61. The site is in a non -urbanizing area and is bounded on all sides by agricultural land. There are no major water features on the site. A geotechnical investigation was not performed at this location. According to the NRCS Web Soil Survey, the entire site is rated as Soil Type A. This soil is described as having a high infiltration rate (low runoff potential) when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands. These soils have a high rate of water transmission. 3. DESIGN CRITERIA The proposed drainage plan follows Weld County Code requirements2 and Weld County Engineering and Construction Criteria (WC-ECC). Weld County Charter and County Code (WC- CCC) incorporates many of the Mile High Flood District (MHFD) requirements by reference into its code. As such UDFCD requirements have been included in the design and analysis for the Goldeneye Compressor Station project. Hydraflow Express Extension for Autodesk AutoCAD Civil 3D (Hydraflow)3 was used to perform many of the hydrologic and hydraulic calculations for this project. The Rational Method was used for most of the hydrologic calculations. The Modified -FAA Method was used for detention pond sizing. The runoff coefficients used in the Rational calculations are taken from USDCM-1-20083 in accordance with Weld County Public Works (WC-PW) requirements. The overall design directives include mitigation of stormwater so as not to negatively impact adjacent properties. 4. DESIGN CONDITIONS The existing conditions ground cover of the project site and the ground cover of the rangeland adjacent to the pad has been stripped of topsoil and can be described as nearly bare ground4. The basin delineation map is presented in Appendix K. The hydrologic soil classifications for the project were obtained from the NRCS Web Soil Survey. The hydrologic soil group is 100% Type A for all basins. 2 Particular attention to Weld County Code Chapter 8 (Public Works), Article XI (Storm Drainage Criteria) has been given for this project designs. 3 Reference Appendix A, Table 3: Reference Software and Websites for more information. 4 The "nearly bare ground" condition has a corresponding Conveyance Factor (K) of 10 within the Rational Method. ASCENT CJOM,'11c `;ai iWWM'S Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page 6 April 2025 Selection of imperviousness values for the project site are based on whether the conditions are existing or proposed; the specific imperviousness values selected for the hydrologic analysis are discussed in Sections 4.1 and 4.2. The design storm data used to analyze both existing and proposed conditions were taken from NOAH Atlas 14 (NOAA-14)5. The NOAH -14 precipitation frequency data used for the hydrologic analysis is provided in Appendix F. The proposed site is not located within the FEMA 100-yr floodplain. The mean groundwater depth at this location is > 6.5 ft (200 cm) below grade. 4.1 Existing Conditions The existing conditions design values are provided in Table 1. Nearly bare ground is the current condition over the project area as the topsoil has been stripped of the site. Stormwater from the project site travels down gradient to the east and eventually reaches the South Platte River. Table 1: Existing Conditions Design Values Parameter Value Average Slope 1-5% Existing Condition Flow Direction West to East Coverage Type Short Pasture and Lawns Conveyance Factor 7 4.2 Proposed Conditions The proposed drainage drawings located in Appendix K show the proposed project site with construction disturbance area and grading. The stormwater management systems for the construction phase were designed based on the construction phase conditions with equipment, which provides a hydrologic "worst case" design. The proposed compressor pad will be capped with 5" minimum Martin Marietta #57/67 washed crushed rock. The compressor station is assigned an assumed imperviousness of 40%. Piers, concrete pads and/or footers are expected and were assigned an assumed imperviousness of 100%. 5 Reference Appendix A, Table 3: Reference Software and Websites for more information. 6 Groundwater elevation taken from GES (see GES in Table 2: Reference Documents). ASCENT CJOM HC Sill iiIllr Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page 7 April 2025 The detention pond was assigned an assumed imperviousness of 2%. Reference Appendix G for composite value for total imperviousness calculations'. See Drainage Drawings in Appendix K for basin delineations. 4.2.1 Stormwater System Design The stormwater system for the Goldeneye Compressor Station Pad is designed to be phased. The construction phase includes two onsite channels, an offsite diversion berm, and a detention pond with a concrete outlet box. Sheet K.2 in Appendix K identifies the stormwater design elements. Once the construction phase is complete, approximately 0.9 acres of the site will be reclaimed as close to existing conditions as possible, and the permanent compressor will remain as constructed. 4.2.1.1 Site Drainage Features Compressor Pad During the construction phase, rainfall that lands on the pad will flow eastward directly to the detention pond. Two onsite channels will manage this runoff: one located to the south and one to the east. These channels will capture the sheet -flow from the pad and direct it to the detention pond. From there, water will flow through the concrete outlet structure and discharge onto the existing ground, resuming its historic flow patterns. The off -site runoff will be diverted around the site by a berm on the south side. Laydown Yard During the construction phase rainfall that lands on the temporary laydown pad will flow west to east onto existing ground where it will flow into the detention pond. 4.2.1.2 Detention Ponds Stormwater for Basin 1 — Design Point 1 will flow across the compressor pad toward the east on to existing ground where it will flow into channels to the south and east that direct water into the detention pond on the southeast corner of the site. The modified -FAA method was used to size the detention pond (Design Point 1). The required detention pond volume is 0.52 ac -ft (22,461 cu-ft)8. The total detention pond volume is 0.71 ac -ft (31,105 cu -ft). The depth of the proposed pond at the outlet structure is 3.0' deep plus 1.5' (minimum) of freeboard above the 1 -hr, 100-yr water surface elevation. The pond is graded at 4:1 interior side slopes. The detention pond utilizes a concrete 7 Imperviousness calculations were performed by referencing USDCM-1 Table 6-3 "Recommended Percentage Imperviousness Values" (see Appendix A for more information on USDCM-1) 8 Reference Appendix J— DETENTION / WQCV CALCULATIONS ISO arat ASCENT CJOM HC Sill iiIllr Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page 8 April 2025 outlet structure with a maximum design release rate (0.09 cfs) less than the 10 -year historical release rate of 0.96 cfs8. The detention pond design also includes a 15' wide emergency spillway. 4.2.1.3Best Management Practices The production pad will be serviced by a stormwater pond in accordance with Weld County criteria. Storinwater runoff will be treated through Best Management Practices (BMP) to reduce sediment transport from the pad. The following BMPs are intended for the production pad: • Fiber roll, wattles • Revegetation/Mulching • Surface Roughening arat ASCENT CJOM HC Sill iiIllr Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page 9 April 2025 5. MAINTENANCE PLAN Drainage Basin Detention ponds have low to moderate maintenance requirements on a routine basis but may require significant maintenance once every 15 to 25 years. Maintenance frequency depends on the amount of construction activity within the tributary watershed, the erosion control measures implemented, the size of the watershed, and the design of the facility. Inspection of the surface system will include functional and aesthetic needs. Functional maintenance is important for performance and safety reasons and aesthetic is important primarily for public acceptance of stormwater facilities. The removal of debris, sediment, overgrown or weedy vegetation will be prioritized based upon the inspection results. Inspection Inspect the drainage structures at least once annually, generally in the Spring, observing the amount of sediment where channels discharge into the pond and checking for debris at the outlet structure. Maintenance Debris and Litter Removal - Remove debris and litter from the detention area as required to minimize clogging of the outlet. Mowing and Plant Care- When starting from seed, mow native/drought tolerant grasses only when required to deter weeds during the first three years. Following this period, mowing of native/drought tolerant grass may stop or be reduced to maintain a height of no less than 6 inches (higher mowing heights are associated with deeper roots and greater drought tolerance). In general, mowing should be done as needed to maintain appropriate height and control weeds. Mowing of manicured grasses may vary from as frequently as weekly during the summer, to no mowing during the winter. Sediment Removal from the Basin Bottom- Remove sediment from the bottom of the basin when accumulated sediment occupies about 20% of the water quality design volume or when sediment accumulation results in poor drainage within the basin. The required frequency may be every 15 to 25 years or more frequently in basins where construction activities are occurring. Erosion and Structural Repairs- Repair basin inlets, outlets, trickle channels, and all other structural components required for the basin to operate as intended. Repair and vegetate eroded areas as needed following inspection. arat ASCENT C LM,'11CS a ur Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page 10 April 2025 The following is a more detailed guideline for detention pond maintenance considerations: Action Maintenance Objective Frequency of Action Lawn mowing and lawn care Occasional mowing Maintain irrigated non -irrigated to limit turf natives grasses unwanted vegetation. grass as 2 to 4 inches at 4 to 6 inches. tall and Routine - Depending on aesthetic requirements. Debris and litter removal Remove debris minimize outlet and litter from the clogging and improve entire pond aesthetics. to Routine - Including and May) and annual, following significant pre -storm season rainfall (April events. Erosion and sediment control Repair and revegetate and channels. eroded areas in the basins Non -routine - Periodic and repair as necessary based on inspection. Structural Repair channel pond inlets, outlets, forebays, low flow liners, and energy dissipaters as needed. Non -routine - Repair as needed based on regular inspections. Inspections Inspect basins to insure function as initially for clogging, erosion, sedimentation levels, and spillway integrity, element. intended. slumping, that overgrowth, and the damage basin continues Examine the excessive embankment to any to outlet structural Routine structural during plugging - Annual inspection of facilities. Also check for routine maintenance visits, of outlets. hydraulic obvious especially and problems for Nuisance control Address associated bottom odor, zone. insects, and with stagnant or overgrowth standing issues water in the Non -routine complaints. - Handle as necessary per inspection or Sediment Removal Remove and the accumulated bottom of the sediment from the basin. forebay Non -routine accumulation may necessary more pond. vary frequent - Performed occupies considerably, per inspection. cleanout 20 but than when sediment percent of the expect to do The forebay other areas WQCV. This this as will require of the ASCENT GEOMancs SOLUTIONS Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page 11 April 2025 6. SUMMARY AND CONCLUSIONS The proposed drainage plan follows Weld County's Charter and County Code (WC-CCC) and the Weld County Engineering and Construction Criteria (WC-ECC). Rational Method and modified - FAA method were used to perform many of the calculations for drainage analysis. The drainage system was designed to be phased. The design implements a detention pond that will service the compressor pad and will remain and serve the site during its life. Best Management Practices will be utilized during production phase to reduce sediment transport from the pad. This report and the calculations have been produced after proper due diligence for the site and surrounding adjacent offsite areas. The drainage design is adequate to protect public health, safety, and general welfare and has no adverse impacts on public rights -of -way or offsite properties. The stormwater management designs provided in this report have been performed in accordance with Weld County requirements. Omer Sohail, P.E. Project Engineer April 2, 2025 arat ASCENT Mark Skelskey, P.E. Engineer of Record CJOM HC Sill iiIllr Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page A.1 April 2025 APPENDIX A - REFERENCE DOCUMENTS, SOFTWARE AND WEBSITES Table 2: Reference Documents Document Abbreviation "Urban Storm Hydrology, and Revised August Drainage Criteria Manual: Hydraulics ", by Urban 2018; Originally Published Drainage Volume September 1 & —Management, Control District; USDCM-1 Flood 1969 "Urban Storm Drainage Criteria Manual: Volume 1", by Flood Control District; Revised April 2008; Originally Published Urban Drainage & June 2001 USDCM-1-2008 "Urban and September Recreation Storm Drainage ", by Urban 2017; Originally Criteria Drainage Manual: Volume 2 & Flood Control September 1969 — Structures, Storage, Updated USDCM-2 District; Published "Urban Practices 2019; Storm Drainage ", by Urban Drainage Originally Published Criteria Manual: & Flood September 1992 Volume 3 Control District; — Best Management Updated October USDCM-3 "Weld County Engineering and Construction Originally Published March 2021. Criteria", by Weld County, CO; WC-ECC "Geotechnical Published Engineering Study," by Kumar & Associates, 2023. Inc., Originally GES-1 June 15, Table 3: Reference Software and Websites Document Abbreviation "Hydra f low Express Extension for A utodesk AutoCAD Civil 3D v2023.3 ", by Hydraflow Autodesk, Inc.; released 2023. "AutoCAD Civil 3D - 2023", by Autodesk; released 2023. CAD-C3D "NOAA Updated https://hdsc.nws.noaa.gov/hdsc/pfds/pfdsmapcont.html Atlas 14", by April 21, 2017 the National Oceanic and Atmospheric Administration, NOAA-14 WC-CCC "Weld County Charter and County Code - Supplement 63", by Weld County, CO; Codified through Ordinance No. 2019-14, adopted September 23, 2019; Updated December 19, 2019. "USDA/NRCS Society. https://websoilsurvey. Web Soil Survey ", sc.egov.usda.gov/App/WebSoilSurvey.aspx by National Resource Conservation NRCS arat ASCENT CJOM HC Sill iiIllr Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page B.1 April 2025 APPENDIX B - ABBREVIATIONS AND ACRONYMS ABC ac AMSL Avg. BMP C CDOT cfs ECMC cm CM ECD EURV FAA FEMA FIRM ft. fps HEC-HMS hr. K LACT MHFD MLVT min. RG RI T0C UD UDFCD Aggregate Base Course acres Above Mean Sea Level Average Best Management Practice Runoff Coefficient Colorado Department of Transportation Cubic feet per second Energy and Carbon Management Commission Centimeters Criteria Manual Emissions Control Device Excess Urban Runoff Volume Federal Aviation Administration Federal Emergency Management Agency Flood Insurance Rate Map feet Feet Per Second Hydrologic Engineering Center - Hydrologic Modeling System hour Conveyance Factor (UD-Rational)9 Lease Automatic Custody Transfer Mile High Flood District Modular Large Volume Tanks minutes Rough Grade Recurrence interval (rainstorm) Top of Concrete Urban Drainage Urban Drainage and Flood Control District 9 Reference Table 3: Reference Software and Websites for additional information on this engineering reference document. ASCENT Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page B.2 April 2025 USDCM-1 USDCM-1-2008 USDCM-2 USDCM-3 WC WC-ECC WC -ED WC-SDC WC-SDC WOGLA WQCV Urban Storm Drainage Criteria Manual — Volume 1 10 Urban Storm Drainage Criteria Manual — Volume 1(2008) 10 Urban Storm Drainage Criteria Manual — Volume 2 10 Urban Storm Drainage Criteria Manual — Volume 3 10 Weld County Weld County Engineering and Construction Criteria 10 Weld County Energy Department Weld County Storm Drainage Criteria Weld County Storm Drainage Criteria Addendum 10 Weld County Oil & Gas Location Assessment (permit) Water Quality Capture Volume 1° Reference Table 2: Reference Documents for additional information on this engineering reference document. irst ASCENT CJOMICS Sill iiIllr Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page C.1 April 2025 APPENDIX C - DRAINAGE REPORT CHECKLIST Drainage Report Checklist Project Name: The purpose of this checklist is to assist the applicant's Engineer with developing a drainage report that supports the intent of the Weld County Code using commonly accepted engineering practices and methodologies. Is the project in the MS4? DYes D No If yes, the following requirements in blue apply„ See Chapter 8, Article IX of the Weld County Code. Report Content Weld County Case Number Certificate of Compliance signed and stamped by a Colorado Licensed PE ❑ Description/Scope of Work El Location (County Roads, S -T -R) ❑ Nearby water features and ownership CI Total acres vs. developed acres ❑ Hydrological soil types/maps • FEMA Flood Zones Urbanizing or non -urbanizing ❑ Methodologies used for report & analysis (full spectrum is not accepted) ❑ Base Design Standard used for permanent control measure design in the MS4 ❑ Discussion of offsite drainage routing Conclusion statement indicating that the design will adequately protect public health, safety, and general welfare and have no adverse impacts on public rights -of -way or offsite properties Hydrology and Hydraulic Analysis ❑ Design Storm / Rainfall Information (NOM Atlas or Local Data) ❑ Release Rate calculations • Post construction site imperviousness ❑ Hydrologic calculations (historic & developed basins) ❑ Hydraulic calculations for proposed drainage improvements (swales, culverts, riprap, pond, outlet, spillway, WQCV outlet, etc.) ❑ DetentionNVOCV calculations Construction Drawings ❑ Stamped ped by PE ❑ Engineering scale & north arrow El Property lines, rights -of -way, and easements ❑ 1' Contours & elevations (existing & proposed) ❑ Pre- and post -development drainage basins ❑ Arrows depicting flow direction 1 Time of concentration critical path Drainage design points ❑ Improvements labeled El Permanent control measure and associated drainage features labeled "No Build/No Storage', include design volume ❑ Cross sections for open channels, profiles for pipes ❑ Elevations for inverts, flow lines, top of grates, orifice(s), etc. IE] Pipe specs (size, material, length, slope) • Outlet and spillway details Maintenance Plan ❑ Frequency of onsite inspections Li Repairs, if needed Cleaning of sediment and debris • Vegetation maintenance ❑ Manufacturer maintenance specifications, if applicable l9 Other Required Documents (If Applicable) l _ a Variance Request and documentation— explain hardship, applicable code section, and proposed mitigation. Variances will not be granted for the Base Design Standard requirement in the MS4. Highlighted Items _ Minimum Requirements for Preliminary Drainage Report *Note: Additional information may be necessary on a case by case basis* Department of Public Works I Development Review 1111 H Street, Greeley, CO 80631 I Ph: 970-304-6496 I wwwv.weldgov.comidepartmentsipublic_worksidevelopment_rerriew ASCENT C LM,'11CS a ur Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page D.1 April 2025 APPENDIX D - VICINITY MAP DATA SOURCE: ES TO LNIERSlATE 7€ DISCLAIMER; THIS PLOT DOES NOT REPRESENT A MONUMENTMONUMENTED LAND SURVEY AND SHOULD NOT BE RELIED UPON TO DETERMINE BOUNDARY LINES, PROPERTY OWNERSHIP OR OTHER PROPERTY INTERESTS_ PARCEL LINES, IF DEPICTED, HAVE NOT BEEN FIELD VERIFIED AND MAY BE BASED UPON PUBLICLY AVAILABLE DATA THAT ALSO HAS BEEN INDEPENDENTLY VERIFIED ASCENT AERIAL IMAGERY: NAIP 2019 PUBLICLY AVAILABLE DATA SOURCES HAVE NOT BEEN INDEPENDENTLY VERIFIED BY ASCENT GEOMATICS SOLUTIONS Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page E.1 April 2025 APPENDIX E - FEMA MAP 20 21 J MAP MO 0 SCALE 1" = 2000' 2000 4000 I-i I -I P_ ; 1 1 FEET --I 1 METEI I i 0 600 1200 PANEL 2.040E 29 I 28 II III FIRM C1tl FLOOD INSURANCE RATE MAP r rn rOR(1 p c" WELD (O LINT \ ,_ COLORADO AND ] I: �{ - t3ltAT)&DA►.FiEA5 at PANEL 2000 OF 2250 (SEE MAD EgDet FOR FIRM I JIEL LAYOUT' ;DIVAN Q .a [ CCUNJJNIW $UW9ER PAKEl. Ea (hvp. swabit.isin. Pi5•.Lsts n•tit F ' A 1 CtI tit " ated , Areas #\ r U. ' 11 ro CI • it htcs ao1C U5 ar The Map INullnter shawl beim t►eaiJ0 be u5.1 *I plecin¢ snap odors; 11* II � Community Number shoran above should be 1 for = Ai. used an Ircsuarrc applications et subject cam-Inlly rest MAP NUMBER ` :`r 08123C200DE I t . EFFECTIVE GATE r��• V. JANUARY 20, 2016 1 ,, II;,I,II Federal E merirun \iar atrtnemi AlarIIfl . Sale - . � '. ...staitahaa•nnthsMLRtbcd TUs dt id of ISdait FitlI:SJ fine. shoveleip i Stilton Sr the a lCdn ,¢t.uate Mood loop 4soit;rd hem is /Esc einwi+nta Web idol. This sap than rant retied - change or anandmanla =hot! nay harts hhn muds salssiguint So The dna a the inl* War- Far ad&banM Into nsgan Sault haw to mttitt lain St map Is ("Toren Pet 0ttclot.* Flame, NlappiR) 4mpdamts 4'mrlaw Feet 'cheat M4.SinntCPrInhumspigsatheredr'rnirini.gea. ASCENT GEOMATICS SOLUTIONS Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page F.1 April 2025 60 -day APPENDIX F - NOAA ATLAS 14 PRECIPITATION FREQUENCY TABLE 3119425. 1.25 PM Precipitation Frequency Data Steer t4OAA Atlas III,. Volume %Version 2 Location n &ne: Keenes burg, Collorado, IuisA* -Latitude 40.191c, c, Longitude: -104.451'' Elevation:: 432 fir mum*: ESRI Ma " sore: USGS POINT P-RECIPITATION FREQUENCY ESTIMATES Sally Perltz, Deterah Martin, Sa n ra P ill's k , Roy, P II;tae St_ Laurent, 0311 T: -)pa "uk, Unruh, MIcr"aeI `* I[.t3, Serer) E:ir 1 NOAA, t,ational V eatne- SE-WIce, SiM2r spring, Marrand PF tabu ar I raga21101 I stidays & aeries. PF tabular ale PD -based point precipitation frequency estimates w 90% confidence intervals (in inches]1 Duration) _ Average recurrencinterval (years) 1 2 10 -mart 15 -min 30 -mine 0247 0200 (0.1N-1311)1 ,1.24Ct_377 0.362 (0290-0.468)1 0.442 (0.354-0.558; 0.591 (02473-0.743 -hr 24 -hr 2 -clay e 729 (0.584-0..917 0 W.351-0.552) 0.535 r .428-1073 0 -an 419B-1.10) 1-03 MO -1.29 112 1-12 (0.1103-1.38)' 1.29 (1.06-1.50) 1.29 1.53 1.05-1.:5 (1.26-1.87) 1.53 1.81 (127-'1.85) 11.60-Z18) 1.76 (147-210) 3 -day 4 -clay 1.92 (1.61-2.20) (123-2.43) 7 -day 134 (1.98-2.75) I3'- I }r e 159 M,2 .20-3M. 2.0 -day 3.32 (2.86-3. -i _ 3.9.3 (3:30-4.53) 4.66 "4.04-5.35) 5.28 ;4.57-6.01 2.09 1..74-0). F(2.28 1.89-2.691 2.39. 2.01-184) 2.72 (2.020) 5 10 25 5 0.398 (0.317-0. ) 0.491 (a38�.622j 0137 (0.494-0255)_ 0..763 0.574-1.03) ,411.582 (0.484-0.734)i 0.710 0.5.8 0.947 (0355-123) 1.15 (0.017-1.46) 0.718 (a_569 -0.91O) 0.932 t0.724-125) 1.12 0.841-1.511 0.876 (D.ciei 1.1 I' 1._14 (O. 3-1.53) ";1-02- 1.36 .84) 1.17 (O.92d-1..48) 1.52 {1..`18-2..) (1.37-148) 1.82 1.42 1.86 224 (1.13-1.80) (1.45-2.51) _ (1.69-3.04) 126 i i _CrP.-1.79 1.68 (1.34-211) 2.20 (1..73-2_05) I 2.89 "2.03-3.5Q) 1.46 (1..141-1.81) ISO (1.44-215) .2 7r 028-3.17) 2.82 (2_20-3.85) 1.67 (1.30-2.06) 120 (1.U-2.42) 2.30 (1.90-2.78) 215 (1.22x4) 1'_75 22,2'6-3..35 2.67 (2.14454) 3.23. (2.50-42D) 4.01 (3.12-5.16 2.66 (2.21-3.19) 2,61-3.81) 328 (3.124. 4.47E 3.50-5 213 (2.37-3.38 2.97 2.40-3..53' 3.35 (2.-3.I) 3.34 2.76-4.00) 4-07 13.28-5.07 4.68 r.3_67-5.871 3_el8 (2.00-4.15) 4.21 (3.41-5.22) 411 (3.90-6.03) 3.89 ?26-4.81) 4.6 :78-5.N) 5'_25 (417-6.51) 3,00 {2.55--3.521 319 13.12-4.33) _ 3.82 {3.284.441 4.62 C3.95-5.38) 4.49 3.87-5.19'1 5.40 4.044125 5..33 (4..62-5-12) 6.04 15.25-6_911 0.39 (5.52-7.30) 4.26 5.05 (3=5P-5.02) . 114.1 '-6.12} 5.27 8_.15 ;4_48-6.161 15.04-718 5.66- (4,50-6.96L 8.8,1 L A6-8.2 dr 8.12 (5_23-7.12) 7.x044 5.84-8.42) 7.81 (629-9.41) 7.24 (16..21-8.37) 8.34 (0.90483) 9.15 -40-10.0) 716 9_21 9.45 1,6.28-3. 7.137-9.481 -9.481 17.82-4.1.11. _ 10.3 (e.39-12.31 100 ' 200 5 1000 OL902 (0.03-1.24) 1.05 (173 1 -1 A'g ), 1_28 (0..8481.85) 1.46 (0.936-2 =1 1 1.32 10.7-1.'{ 1,54 (1.07-18) 137 (1.24-2.71) 1.61 (117-2_22) 1.88 (120-2.66) 228 :1.51-3.3f") 2.15 (1.50-2S7) 2.52 (1.75-3.56) 3.05 (2.104.42) 2.67 (1.04-320) 3.14 (2.18446) 3.84 (.2.55-5.57) 3.18 4.82 3.77 {2.33-x#_38) .64-5.30) (311-6_66) , , 3.45 4.10 5_05 {254-4.73) (2.80-5.74) (3.41-7.23) 4.23 4.91 5 (3.16-5_64) (3.51 j , (4.04--8.23) 4.63 5.30 6.26 .. 8-6.'..rD) {3.82.-7.15) (4.33-8..05) 5.09 (3250 I 5.74 (4.16-7.62) 0184 (4.82-9.04) 5 5.9.4 825 14.E -x.27} 543 (41442 8) 6.09 {4.48-8_00) 7_00 14.02-9.44 527 I (4.50-744) I 1;4. 6.51 r7 t-9.46) _ 7.38 (5.22-9.83) 8.28 i4.83-7.89) I 10-800:1 6.91 77'4 15.5 -10.2 7.46 15.78-928S,6,40-1121 8.11 8.95 8.51 (5:63-10.5) 9.20 (6.87-11.6) 10..1 (7.24-13.0) 9.92 10_.7' 41.6 {7.76-111) F 8.00-13.4) (8.37-14.0) 11.2 r;r6-13.6' 12.0 0.01-14:91 12.9 19.37-18.5 2.14 , (1.37-3.1G), F12_1 1_87-3.78 3.49 4-5.07) d_41 (2223-6.41) 5.34 (34'6-7.08) 514 (320-ft36) 6.49 (427-921) 8.89 (4.44-4.30) 7i�_ 04 (4.i 2-0.78) 7.35 (4148-10.1) 9._05 (5.54-10.9) 12.2 -;8.44-16.00 13.6 (9.54-17.7 1 Precipitation frequency ,{{PF.:, estimates in this table are based on frequency analysis of partial d aitian series "PDS). Numbers iii parenthesis are PF estimates at lower and upper bounds of Ike 90% carnfidenc interval_ The pnobabiityr that precipitation frequency estinates (fora given cluratian and average recurrence interval) ww- l be greater than he upper r _ound (or less than the lower bound) is 5%. Estimates at ii--o.per bounds are not chenot checked against probable maximum precipitation (PMP: estimates and -nay be higher than currently valid PliF values. Pease refer tic- NOMAllas 14 document for more ilJucr" Back to Too ASCENT GEOMATICS SOLUUONS Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page F.2 April 2025 Maps & aerials SKIM scads (arrain 7 li .%l II FEI ISa'W9• ■ If 4.9.; 6JIVn MIPS ILJ•,••"••• 'i::d% i U'Lf 3k 1 Ara r: • p. I • I J. LT. in Fo In ri I I'I.H' ,b F r.0' .r ti 4.-i t. arge scale tefl r Cheyenne or I,y=I.99Eel 1� •Denver Large scale map Ureeiey Long t !r Ei.-:1.I .A‘ -w I IL Urge scale aerial ASCENT a GEOMATICS SOLUTIONS Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page G.1 April 2025 516470 Appendix G — NRCS SOILS DATA Hydrologic Soil Group —Weld County, Colorado, Southern Part (Goideneye) Nbp k: 1:2,160 f ci'':.A bri:a (11 x 8.5") sheet. II szi Mains 980 Feet Cs • 00 41 0013 hbp pRo% 3n: 'e .th Nie r Come- lesio330-4 Eige ha: UM Zc'le 13N ING984 usDA Natural Resources i Conservation Service Web Soil Survey National Cooperative Soil Survey ASCENT G UMAULS SOW [IONS 3/1912025 Page 1 of 4 e n'27 Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page G.2 April 2025 Hydrologic Soil Group Weld County, Colorado, Southern Par (Goldeneye) MAP LEGEND Area of interest (AU) Area of Lrtterest (Acl) Soils Soil Rating Polygons. E ED cirri Not rated or not available lable Soil Rating Lines o . ortior AID ersio B/D Tisurpo B C CPD Not rated or riot available Soil Rating Points A II 0 ■ AID B B/D u D O c![! D Not rate or not available Water Features Streams and Canals Transportation 4 Rails Interstate Highways US Routes Major Roads Local Roads Baci kg round Aerial Photography MAP INFORMATION The soil surveys that comprise your AOl were mapped at 1:24,000. Warning: Soul Map ma,. not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements_ Source of Map: Natural Resources Conservation Service Web Soil Survey LJR:L: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area A projection that preserves area, such as the Albers equal-area conic protection, should he used if more accurate calculations of distance or area are required. This product is generated from the USDA-.NRCS certified data as of the version dates) listed below. Soil Survey Area: Weld County,, Colorado, Southern Part Survey Area Data: Version 23r Aug 29, 2024 Soil map units are labeled (as space allows) for map scales 1:5-0,000 or larger. Date(s) aerial images were photographed: Jun 8, 2O21 —Jun 12, 2021 The orthophoto or other base map on which the soil lines were compiled and:: digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundiaries may be evident. Ls Di. Natural Resources :in Conservation Service Web Soil Survey National Cooperative Soil Survey 3119/2025 Page 2 of 4 Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page G.3 April 2025 Hydrologic Soil Group —Weld County. Cola -aril]. Souttem Part Goldeneye Hydrologic Soil Group Map un t symbol Map „ni name ,a:: ng Acres in AOI[ Percent of AIN 2 Osgood sand, 0 to 3 percent slopes- A 1_6 92% _ e Vaient sand, 0 to 3 percent slopes A 9.0 52.0% 7D \talent sand, 3 to 2 percent slopes A 63 38.8% Totals for Area of Interest 17.3 100014 Description Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are Thoroughly wet, and receive precipitation from long -duration storms_ The soils in the United States are assigned to four groups (A, B, C, and D) and three dual classes (ND, B/D, and CID). The groups are defined as follows: Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands. These soils have a high rate of water transmission_ Group B. Soils having a moderate infiltration rate when thoroughly wet These consist chiefly of moderately deep or deep., moderately mil drained or well drained soils that have moderately fine texture to moderately coarse texture_ These soils have a moderate rate of water transmission.. Group C. Soils having a slow infiltration rate when thoroughly wet These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately fine texture or fine texture. These soils have a slow rate of water transmission. Group D. Soils having a very slow infiltration rate (high runoff potential) when thoroughly wet. These consist chiefly of clays that have a high shrink -swell potential, soils that have a high water table, soils that have a claypan or clay layer at or near the surface, and soils that are shallow over nearly impervious match M. These soils have a very slow rate of water transmission_ if a soil is assigned to a dual hydrologic group (,, BID, or C/D), the first letter is for drained areas and the second is for undrained areas. Only the soils that in their natural condition are in group Ci are assigned to dual classes. 11‘ ASCENT ULOMAULS SOW [IONS Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page G.4 April 2025 c 1rvPi C 11'22"N 516470 A e cI I i Cl',/ater I_:CI;i_I":77, Colorado Sou re n I Part t I: CT; d ' n ey e % Sale: 1:24ifp-r or•Afart= [1.i x BS) the 5 I 1 3C Co 20 f4-3570 �&Sas 180 Feat C' I $� 1,43p pa : Web Mercator Conte ■ din WC -S34 Edge I.JTINi Zane 134 WGSB4 us Natural Resources Conservation Service X I Web Soil Survey National Cooperative Soil Survey 5467: I 546770 643820 546323 I 5460213 311912025 Page1of3 �22rt Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page G.5 April 2025 Depth to Water Table -Weld County, Colorado, Southern Part (Goldeneye) MAP LEGEND MAP INFORMATION Area of Interest (AOH Area. of Interest (AOl) Soils Soil Rating Polygons 0-25 25 - 50 50 -100 100-150 150 - 200 200 a Not rated or not available Water Features Streams and Canals Transportation t Rails 001011 Interstate F-Iigh ways US Fames Major Roads Local Roads Background Not raged or not available Aerial Photography Soil Rating Lines 0 - 25 0 25-50 50 -100 0 100-150 150 - 200 o Not rated or not available Soil Rating Points • 0 - 25 ® 25 - 50 O 50 -100 a 100-150 • 150'-200 • >200 The soil surveys that comprise your AOl were mapped at 1:24,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements.. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area. conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: Weld Bounty, Colorado, Southern Part Survey Area Data: Version 23, Aug 29, 2024 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger Date(s) aerial images were photographed: Jun 8, 2021 —Jun 12, 2021 The orlhophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. USDA Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/19/2025 Page 2 of 3 Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page G.6 April 2025 Depth to Water Table —Weld Cam, Colorado, souther Part Soldereye Depth to Water Table Map unit symbol Map unit name Rating I nti meters) Acres in A01 Percent of A01 49 Osgood sand, G to 3 pert slopes >200 lb 9.2% e< I %talent sand, ,a to 3 percent slopes >200 0_0 5.2.0% 70 Vaent sand, 3 c g peer t slopes >200 6.7 lc c Totals for Area of iritersslc 173 100. Description "Water table" refers to a saturated zone in t i e soil. It occurs during specified months_ Estimates of the upper bruit are based mainly on observations of the water table at selected sites and on evidence of a saturated zone, namely grayish colors (redoximorphic is features) in the soil.. A saturated zone that lasts for less than a month is not considered a water table. This attribute is actually recorded as three separate values in the database_ A low value and a high value indicate the range of this attribute for the soil component A "representatives" value indicates the expected value of this attribute for the component For this soil property¶ only the representative value is used_ Ratting Options Units of Measure: centimeters Aggregation Method: ': Dominant Component Component Percent Cutoff:* Alone Steed TicTiebreak Rile: Lower inter Nulls as Zero: No Beginning Month: January Ending Month: December Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page H.7 April 2025 Appendix H - GROUND SURFACE IMPERVIOUS CALCULATIONS COMPOSITE BASIN- WEIGHTED "% IIPERUOUS" CALCULATIONS -REFERENCE : UDFCD USDCM VI Table 6-3 Recommended Percentage Imperviousness Values Undeveloped areas Off -site flow Historic flow Greenbelts, analysis (when analysis Agricultural land use not defined) Street Paved Gravel Recycled asphalts Drives and walks Roofs % Imperv. 2.00% 2.00% 45.00% 100.00% 40.00% 75.00% 90.00% 90.00% Area Area Area Area Area Area Area Area Total Area Percent Imperv. 2.1 2.1 40% BASIN 1 DESIGN POINT 1 0.2 0.2 100% 5.5 5.5 2% 0.0 5.5 0.0 0.2 2.1 0.0 0.0 _ 0.0 r 7.8 r 15% CONSTRUCTION PHASE 0.6 0.6 40% BASIN 1 DESIGN POINT 2 0.0 0.0 100% 23 2.3 2% 0.0 2.3 0.0 0.0 0.6 0.0 0.0 0.0 2.9 P 12% 0.3 0.3 40% BASIN 1 DESIGN POINT 3 0.0 0.0 100% 0.6 0.6 2% 0.0 0.6 0.0 0.0 0.3 0.0 0.0 0.0 0.9 16% ASCENT F'v'dt.f;CS SOi Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page 1.1 April 2025 Project: Goldeneye Station Location: Weld County Owner: P66 Designer: OS Date: 3/28/2025 APPENDIX I - HYDROLOGIC CALCULATIONS 5-yr 10-yr 100-yr 1 -hr rainfall depth P1 1.15 in 1.42 in 2.67 in Basin ID Design Point Area (ac) Imperviousness (%) NRCS Hydrologic Soil Group W%) Flow Overland length (ft) Overland Slope (ft/ft) Channelized Flow length (ft) Channelized Slope (ft/ft) Type of Land Surface NRCS Conveyance Factor i A B C/D L, S0 Lt Sr Existing Conditions Basin 1 1 7.8 2% 100% 0% 0% 100 0.011 1144 0.013 Short pasture and lawns Proposed Condtions Basin 1 1 7.8 15% 100% 0% 0% 100 0.014 1144 0.013 Short pasture and lawns Basin 1 2 2.9 12% 100% 0% 0% 100 0.014 950 0.013 Short pasture and lawns Basin 1 3 0.9 16% 100% 0% 0% 100 0.011 582 0.017 Short pasture and lawns ASCENT G UMAULS SOW [IONS Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page 1.2 April 2025 Project: Goldeneye Station Location: Weld County Owner: P66 Designer: OS Date: 3/28/2025 Basin ID Design Point Area (ac) Runoff Coefficient Time of Concentration (min) Rainfall (in/hr) Intensity Peak (cfs) Flow C5 C10 0100 Initial ti Channelized tt Total tc 15 110 1100 Q5 Q10 Q100 Existing Conditions Basin 1 1 7.8 0 0.07 0.22 19.25 23.89 43.13 1.44 1.78 3.35 0.00 0.96 5.68 Proposed Condtions Basin 1 1 7.8 0.10 0.17 0.30 16.15 23.89 40.04 1.51 1.87 3.51 1.18 2.50 8.35 Basin 1 2 2.9 0.08 0.15 0.29 16.51 19.84 36.35 1.61 1.98 3.73 0.36 0.87 3.11 Basin 1 3 0.9 0.11 0.18 0.31 17.37 10.63 28.00 1.88 2.32 4.36 0.18 0.37 1.22 rat ASCENT GEOMATICS SOLUTIONS Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page J.1 April 2025 APPENDIX J - DETENTION / WQCV CALCULATIONS Project: Goldeneye Station Location: Weld County Owner: P66 Designer: OS Date: 3/29/2025 Return Interval: 100-yr Time of concentration T, 40.04 min Runoff Coefficient Cl0o 0.30 Tributary Area A 7.8 ac Time Step t 1 min Target Release Rate Cis 0.09 cfs Imperviousness I 15 Storage Facility Type Extended Detention Storm Duration (minutes) Rainfall Intensity (in/hr) Inflow Volume (ft3) Outflow adjustment factor Outflow Volume (ft3) Storage Volume (ft3) T I V; m Vo VS 0 0.00 0 0.00 0 1 11.56 1,623 1.00 5 1,617 2 10.79 3,031 1.00 11 3,020 3 10.13 4,269 1.00 16 4,252 4 9.56 5,369 1.00 22 5,348 5 9.06 6,357 1.00 27 6,330 6 8.61 7,252 1.00 32 7,219 7 8.21 8,067 1.00 38 8,029 8 7.85 8,814 1.00 43 8,771 9 7.52 9,503 1.00 49 9,455 10 7.22 10,142 1.00 54 10,088 11 6.95 10,736 1.00 59 10,677 12 6.70 11,292 1.00 65 11,227 13 6.47 11,813 1.00 70 11,742 14 6.26 12,303 1.00 76 12,227 15 6.06 12,765 1.00 81 12,684 16 5.88 13,203 1.00 86 13,117 17 5.71 13,618 1.00 92 13,526 18 5.54 14,013 1.00 97 13,916 19 5.39 14,389 1.00 103 14,286 20 5.25 14,748 1.00 108 14,640 21 5.12 15,091 1.00 113 14,978 22 4.99 15,420 1.00 119 15,302 23 4.87 15,736 1.00 124 15,612 24 4.76 16,040 1.00 130 15,910 25 4.65 16,331 1.00 135 16,196 26 4.55 16,613 1.00 140 16,472 27 4.45 16,884 1.00 146 16,738 28 4.36 17,146 1.00 151 16,995 29 4.27 17,400 1.00 157 17,243 30 4.19 17,645 1.00 162 17,483 31 4.11 17,883 1.00 167 17,715 32 4.03 18,113 1.00 173 17,941 33 3.96 18,337 1.00 178 18,159 34 3.89 18,554 1.00 184 18,371 35 3.82 18,766 1.00 189 18,577 36 3.75 18,971 1.00 194 18,777 37 3.69 19,171 1.00 200 18,972 38 3.63 19,367 1.00 205 19,161 39 3.57 19,557 1.00 211 19,346 40 3.52 19,742 1.00 216 19,526 41 3.46 19,923 0.99 219 19,704 42 3.41 20,100 0.98 222 19,878 43 3.36 20,273 0.97 224 20,048 44 3.31 20,442 0.96 227 20,215 45 3.26 20,607 0.94 230 20,377 46 3.22 20,769 0.94 232 20,536 47 3.17 20,927 0.93 235 20,692 48 3.13 21,082 0.92 238 20,844 49 3.09 21,234 0.91 240 20,993 50 3.05 21,383 0.90 243 21,140 51 3.01 21,529 0.89 246 21,283 52 2.97 21,672 0.89 249 21,424 53 2.93 21,813 0.88 251 21,562 54 2.90 21,951 0.87 254 21,697 55 2.86 22,087 0.86 257 21,830 56 2.83 22,220 0.86 259 21,961 57 2.79 22,351 0.85 262 22,089 58 2.76 22,480 0.85 265 22,215 59 2.73 22,607 0.84 267 22,339 60 2.70 22,731 0.83 270 22,461 art ASCENT Required Storage Volume V S 22,461 ft3 0.52 ac -ft WQCV Design Storage Volume VW4 3,170 ft3 0.07 ac -ft GEJhiAil PS ;D1LIT!JJNS Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page J.1 April 2025 25,000 20,000 oar sla 15,000 O 10,000 5,000 0 Volume Hydrograph 0 10 20 30 40 Duration (minutes) SO Major Storm Inflow Volume Major Storm Outflow Volume Major Storm Storage Volume Minor Storm Inflow Volume Minor Storm Outflow Volume Minor Storm Storage Volume 60 70 A1/4t) ASCENT GrJ1;'f' IIC:i ;0J1LIT OMS Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page J.2 April 2025 Project: Goldeneye Location: Weld County Owner: Chevron Designer: OS Date: 3/28/2025 Legend: Stage Storage Increment Pond (ft) Depth Pond Volume (ft3) 1 0.1 0.0 2 0.2 149.5 3 0.3 460.0 4 0.4 929.7 5 0.5 1558.9 6 0.6 2348.3 7 0.7 3298.5 8 0.8 4410.5 9 0.9 5613.6 10 1.0 6835.2 11 1.1 8075.4 12 1.2 9334.2 13 1.3 10611.8 14 1.4 11908.3 15 1.5 13223.8 16 1.6 14558.4 17 1.7 15912.1 18 1.8 17285.2 19 1.9 18677.6 20 2.0 20089.5 21 2.1 21521.0 22 2.2 22972.1 23 2.3 24443.1 24 2.4 25933.9 25 2.5 27444.7 26 2.6 28975.6 27 2.7 30526.7 28 2.8 30526.7 29 2.9 30526.7 30 3.0 31105.2 31 3.1 31105.2 32 3.2 31838.4 33 3.3 31838.4 34 3.4 32642.7 35 3.5 32642.7 36 3.6 33512.5 37 3.7 33512.5 38 3.8 34443.8 39 3.9 34443.8 40 4.0 35434.5 41 4.1 35434.5 42 4.2 36482.9 43 4.3 36482.9 44 4.4 37587.8 45 4.5 37587.8 ASCENT Input Output Warning GEOMATICS SOLUTIONS Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page J.3 April 2025 Project: Goldeneye Location: Weld County Owner: Chevron Designer: OS Date: 3/29/2025 Legend: Input Output Warning Restrictor Plate Sizing 100-yr Water Surface Depth h 2.17 ft Maximum Allowable Flow Q 0.90 cfs Pipe Inner Diameter D 12.00 in Pipe Inner Radius r 6.00 in Distance from Pipe Invert to Bottom of Restrictor Plate d 2.75 in Distance from Pipe Invert to Bottom of Restrictor Plate d 2 3/4 in Central Angle 1.997 Discharge Coefficient Co 0.60 Required Orifice Flow Area A0 18.29 in"2 Design Orifice Flow Area A 19.55 in^2 D C O ftitabis d ASCENT GEOMATICS SOLUTIONS Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page J.4 April 2025 Project: Goldeneye Location: Weld County Owner: Chevron Designer: OS Date: 3/29/2025 Legend: Input Output Warning Pond Design Storm Event Volume Water Surface Elev. Drain Time % Drained Peak Flow WOO/ VwQ 3,170 ft"3 Zwc 0.69 ft 35.50 hr #N/A Q Q 0.04 cfs 5-yr V5 0,976 ft"3 75 0.41 ft 17.00 hr I #N/A 05 0.02 cfs 10-yr V10 3,970 ft"3 Z10 0.76 ft 40.67 hr #N/A 010 0.04 cfs 100-yr V100 22,491 ft"3 Z100 2.17 ft 118.33 hr #N/A 0100 0.09 cfs WQ Orifices 44 of Orifice Rows 2 # of Orifices per row 3 Orifice Spacing 5.0 in Discharge Coefficient Co 0.60 Orifice Diameter D0 yr 0.625 in Orifice Diameter D0 5/8 in Orifice Area A0 0.0021 ft"2 Minor Storm Orifice Rectangular Orifice Width Wo Rectangular Orifice Height Ho Orifice Diameter Do Orifice Diameter D0 Orifice Elevation Zo Discharge Coefficient Co Orifice Area A0 Box Weir Box Width WB 3.00 ft Box Length LB 3.00 ft Top of Box Elevation ZB 3.33 ft Weir Coefficient Cw 3.33 Trash Rack Area Reduction 50% Spillway Weir Discharge Q 8.4 cfs Weir Coefficient CBOW 3.0 Depth of flow through weir H 6.0 in Side slope of weir (H:V) Z 4.0 Minimum Length of Weir L Design Length of Weir Lc 10 ft ASCENT GEOMATICS SOLUTIONS Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page J.5 April 2025 Project: Goldeneye Location: Weld County Owner: Chevron Designer: OS Date: 3/29/2025 Legend: Input Outpul Warning Outlet Pipe Maximum Capacity Manning Roughness Coefficient n 0.013 Diameter D -1.---) i n Slope S 0.005 Area A 0.785 ft"2 Hydraulic Radius (full flow) R 0.250 ft Maximum Flow Rate Q 2.53 cfs Culvert Outlet Protection Design Discharge 0 0.90 ft^3/s Allowable Velocity V 3.0 ft/s 7 Number of Barrels 1 Pipe Inside Diameter (in) D 12 in Pipe Inside Diameter (ft) D 1.0 ft Froude Parameter Qi/D2.5 0.90 QI/D1.5 0.90 Tailwater Depth (If known) Yt ti Calculated Tailwater Depth (If unknown) Yt 0.40 ft Tailwater Depth I Depth of Water Yt/D 0.4 Expansion Factor 1/(2tan e) 4 5.5 Area of flow At 0.3 ft^2 Riprap Design Type I D50 9 in Depth of Protection Hp 18 in Length of Protection LP -1 ft Width of Protection T 3 ft Art ASCENT OK OK UseLp=6D Gf;7hii1 IC:i ;01!ITOM S Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page J.6 April 2025 Volume (f13) 25,000 2Q000 15,000 10,000 5,000 0 Volume Outflow Hydrograph 10 20 30 40 50 60 70 0 Time (hours) WQCV — 5-YR 10-YR 100-YR 80 ASCENT GEOMATICS SOLUTIONS Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page J.7 April 2025 Channel Report Hydra -low E xpr_ ss Exlensien for Autodeske Civil 3D6 by Autodesk, Inc. Channel DP2 Trapezoidal Bottom Width m.) Side Slopes (L1) Total Depth (ft) Invert Elev (ft Slope (%) N -Value ► alculation: Compute by: Known O (els) Elev (ft) 4824.00 4823.50 4823.00 4822.50 4822.00 4821.50 _ 2.00 =1'_50 = 482ZOO = 2.50 = O.025 Known O = 3.1 1 Section Highlighted Depth (ft) Kcfs) Area (qtt)� Velocity s) Vetted Perim (tt) Crit Depth, Ye CO Top Width (ft) EGL (ft) Friday, Mar 28 2025 = 0.30 = 3.110 0.06 _ 3.24 = 4.47 _ O.34 _ 4.40 _ O.46 Depth (ft) 2 4 6 8 10 12 14 Reach (fit) ASCENT 16 18 ZOO 1.50 1.00 0.50 1.00 -0_50 GEOMATICS SOLUTIONS Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page J.8 April 2025 Channel Report -idragow Express E> sip tor Au lest®Civil 3D® by Aubodesk, Inc. Channel - DP3 Trapezoidal Bottom ids (ft) Side Slopes (z:1) Total Depth (ft) nvert Elev (ft) Slope ( o) N - Value Calculations Compute by: Known O (cfs) Elev (ft:) 4824.00 4823.50 4823.00 4822.50 4822.00 4821.50 = 2:_00 4_00r 4_00 = 1.50 = 4822_00 = 1.00 = 0.025 Know U _ 1.22 Section. Highlighted Depth (ft) (cis) Area ( 4tt) Velocity (ft's;) Wetted Perim (ft) Crit Depth, Yc (ft) Top width (:ft EGL eft ) Friday, Mar 26 2025 - 0.2- = 1.220 = 0.61 _ 1.82 =3.00 _ 0.:20 = 3.84 = 0.28 Depth (ft) 0 2 4 6 10 Reath (ft) ASCENT 12 14 16 18 ZOO 1.50 1.00 0.50 0.00 -D 50 GEOMATICS SOLUTIONS Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page J.9 April 2025 Channel 1 Channel Outlet Protection Design Discharge Q 3.1 ft"3/s Allowable Velocity V 3.2 ft/s Width of Channel (at H/2) W 6.4 ft Design Water Depth H 1.5 ft Froude Parameter Q/WH1.5 0.26 Q/WH°.5 0.40 Tailwater Depth (If known) Yt Calculated Tailwater Depth (If unknown) Yt 0.60 ft Tailwater Depth / Depth of Water Yt/H 0.4 Expansion Factor 1/(2tan 0) iii 6.6 Area of flow At 1.0 ft"2 Riprap Design Type L D50 T S ii.i Depth of Protection Hp 18 in Length of Protection LP -32 ft Width of Protection T 8 ft ASCENT OK Use Lp = 6H 9 ft GEOMATICS SOLUTIONS Goldeneye Compressor Station: Preliminary Drainage Report Document: FDR 01 Rev B Page J.10 April 2025 Channel 2 Channel Outlet Protection Design Discharge Q 1.2 ft^3/s Allowable Velocity V 1.8 ft/s Width of Channel (at H/2) W 5.8 ft Design Water Depth H 1.5 ft Froude Parameter Q/WH'.s 0.11 Q/WH°.5 0.17 Tailwater Depth (If known) Yt Calculated Tailwater Depth (If unknown) Yt 0.60 ft Tailwater Depth / Depth of Water Yt/H 0.4 Expansion Factor 1/(2tan e) 1 6.6 Area of flow At 0.7 ft"2 Riprap Design Type 1 L D50 gin Depth of Protection Hp 18 in Length of Protection LP -31 ft Width of Protection T 8 ft ASCENT Use Lp = 6H dcp Midstteam. Goldeneye Compressor Station Noise Narrative DCP intends to build and operate the Goldeneye Station in a manner that is not detrimental to the public health, safety, welfare, the environment, and wildlife resources, or detrimental to the character of the surrounding area. The facility shall adhere to the maximum permissible noise levels allowed in the Industrial zone, as delineated in C.R.S. §25-12-103 and with all applicable State noise statutes and/or regulations. The manufacturer estimates that the noise rating (without insulation) of the compressor motor is 85 db(A) at 1 meter. Because DCP intends to house the compressors in an insulated building, DCP anticipates that noise levels will not exceed 65 db(A) at the property line. The operation of the Goldeneye Station shall be comparable to surrounding facilities, which are described as mineral resource development facilities, mining and mineral processing facilities, oil and gas locations. The Goldeneye Station is in the middle of a ranch with no residences within one mile of the proposed location. Due to the remote nature of the proposed development and the lack of any nearby receptors, the anticipated Goldeneye Station will not have a noise point of compliance to measure dBA noise levels. Complaints DCP shall provide and post 24 -hour, 7 days per week contact information to deal with any noise complaints. If a noise complaint is made to either DCP directly, to Weld County or to ECMC, noise levels will be measured within forty-eight (48) hours of DCP's receipt of the complaint. DCP will contact the concerned party (if contact information is available) to discuss the complaint and the results of the noise measurements. Contacts Should a noise complaint be filed with Weld County or ECMC, the complaint should be forwarded to the following address: DCP Operating Company c/o Zach Prociv 35409 County Road 18 Roggen, CO 80652 Zachary.d.prociv@p66.com 970-415-2036 dep Midsret am. Use by Special Review (USR) Names and Addresses of any owner, operator of any oil and gas facilities, irrigation ditches/laterals, pipelines, overhead lines, railroad, etc. on the property Oil and Gas Facilities NOBLE ENERGY INC - 100322 1099 18TH STREET SUITE 1500 DENVER, CO 80202 USA PHONE (303) 228-4000 EMERGENCY (888) 634-7928 CELL (281) 768-1603 Irrigation ditches/laterals N /A Pipelines Overhead Lines N /A Railroad N /A Water Well STATE BOARD OF LAND COMMISSIONERS 1127 Sherman St #300 DENVER, CO 80203 720-854-3316 nick.massie@state.co.us ASCENT O01•041ICS SUiU+U0I4S COLLECT • ANALYZE- DELIVER GEOSPATIAL DATA dep Midsret am. Use by Special Review (USR) Traffic Narrative Traffic Narrative: Approved Access Permit APOG20-0082 onto Weld County Road 59 north of WCR 20. 1. Describe how many roundtrips/day are expected for each vehicle type: Passenger Cars/Pickups, Tandem Trucks, Semi-Truck/Trailer/RV (Roundtrip = One (1) trip in and One (1) trip out of site). Passenger Cars/Pickups: 20 round trips daily, (20 in and 20 out), Tandem trucks 4 trips in and out, Semi -Truck (3 in and 3 out) 2. Describe the expected travel routes or haul routes for site traffic. 100% of traffic will be coming from Keenesburg on Co Rd 18 which then turns into Co Rd 59 3. Describe the travel distribution along the routes (e.g. 50% of traffic will come from the north, 20% from the south, 30% from the east, etc.). 100% of traffic will be coming from Keenesburg on Co Rd 18 which then turns into Co Rd 59, no other route onto the Guttersen property. 4. Describe the time of day that you expect the highest traffic volumes. The highest traffic volumes are expected from 6:30 AM - 8:00 AM and from 5:00 PM - 6:00 PM. 11 ASCENT G(&4IATICS S0LU+U0I4S COLLECT • ANALYZE- DELIVER GEOSPATIAL DATA From: To: Cc: Subject: Date: Attachments: Stephanie Hamill Justin Garrett Jordan Lukasik; Matt Perse RE: WCR59 Keenesburg access permits Thursday, April 3, 2025 11:31:23 AM image003.pnq Justin, I do not see any active right of way permits on the route indicated in your map. Let me know if there is anything eke I can help you with! Thank you, Stephanie Hamill Planning and Zoning Coordinator Town Management &r Public Works Administration Town Event Planner Building Permit Tech C: 720-442-4843 O: 303-732-4281 x 5 Web townofkeenesburg.com Email shaminkeenesburg.org 91 W Broadway Ave., Keenesburg, CO From: Justin Garrett <jgarrett@ascentgeomatics.com> Sent: Tuesday, April 1, 2025 7:03 AM To: Stephanie Hamill <shamill@keenesburg.org> Cc: Jordan Lukasik <jlukasik@ascentgeomatics.com>; Matt Perse <mperse@ascentgeomatics.com> Subject: WCR59 Keenesburg access permits Stephanie Thank you for returning my call. Yes, you understand exactly what I am looking for. Here is a map of the approximate route that I am lookinc for any applicable access permits along Thanks again Justin Garrett Sr. Regulatory Analyst Ascent Geomatics Solutions (Formerly PFS) Main Office: 303.928.7128 Direct: 720.504.7052 8620 Wolff Court Westminster, CO 80031 TBPLS Firm Registration No. 10194123 4/1/2025 6:57:47 AM k'nF l D C CIJ NT'F, -.' C Scale: 1:61671 Data layers that appear on this map may or may not be accurate, current, or otherwise reliable. A Notes: DISCLAIMER: This product has been developed solely for internal use only by Weld County. The GIS database, applications, and data in the product is subject to constant change and the accuracy and completeness cannot be and is not guaranteed. The designation of lots or parcels or land uses in the database does not imply that the lots or parcels were legally created or that the land uses comply with applicable State or Local law. UNDER NO CIRCUMSTANCE SHALL ANY PART THE PRODUCT BE USED FOR FINAL DESIGN PURPOSES. WELD COUNTY MAKES NO WARRANTIES OR GUARANTEES, EITHER EXPRESSED OR IMPLIED AS TO THE COMPLETENESS, ACCURACY, OR CORRECTNESS OF SUCH PRODUCT, NOR ACCEPTS ANY LIABILITY, ARISING FROM ANY INCORRECT, INCOMPLETE OR MISLEADING INFORMATION CONTAINED THEREIN. dep Midsret am. Use by Special Review (USR) Waste Handling Plan The Goldeneye Station will not generate waste as part of its operation. Incidental trash will be placed in roll -off dumpsters that will be maintained and disposed of by a licensed waste disposal company. Portable toilets will be used on site during operations and will be cleaned and managed by an approved opera'ng company. No other waste is expected to be generated at the facility. All waste will be stored, handled, transported, treated, recycled, or disposed of in accordance with federal, state, and county regulations, to prevent any significant adverse environmental impact on air, water, soil, or biological resources. (Ord. 27, 1998 §1). 12 ASCENT G(&4IATICS S0LU+U0I4S COLLECT • ANALYZE- DELIVER GEOSPATIAL DATA Notice of Inquiry Weld County Department of Planning Services Pre -application Case # PRE25-0028 Date of Inquiry 2/28/2025 Municipality Keenesburg CPA Name of Person Inquiring Patrick Groom Property Owner Guttersen Ranches LLC Planner Diana Aungst Planner Phone Number 970-400-3524 Planner Email Address daungst@weld.gov Legal Description SW4 28 3 63 Parcel Number 121728000003 Nearest Intersection Northeast corner of CR 28 and CR 65 (Section Line ROVV) of Inquiry Compressor Station Type The above person met with County Planning staff about developing a parcel of land inside your designated Intergovernmental Agreement/Coordinated Planning Agreement Boundary. il I H , 1 t.1‘ '9)--\\ ' -) .1.4) \,. A County Planner's signature 4 Would you like to pursue annexation of this property? NO K' YES Date of Contact U y 7 o?( Comments: O,--rh 07. OtraZirc aftV, ft „„,,,,,,,,,en Signature of Municipality Representative Title je Date Please sign and date to acknowledge that the applicant has contacted you and return this signed form to Weld County Department of Planning Services. Department of Planning Services 1402 N 17th Ave, PO Box 758, Greeley, CO 80632 970-400-6100 I www.weld.gov 20230310 Weld County Treasurer Statement of Taxes Due Account Number R0130094 Parcel 121728000003 Assessed To GUTTERSEN RANCHES LLC PO BOX 337090 GREELEY, CO 80633-0619 Legal Description r 7371-ASW428363 Situs Address Year Tax Charge Tax Interest Fees Payments Balance 2024 $79.68 $0.00 $0.00 $0.00 $79.68 Total Tax Charge $79.68 Grand Total Due as of 04/02/2025 $79.68 Tax Billed at 2024 Rates for Tax Area 2442 - 2442 Authority WELD COUNTY SCHOOL DIST RE3.1-KEENESBURG S. E. WELD FIRE AIMS JUNIOR COLLEGE HIGH PLAINS LIBRARY Taxes Billed 2024 * Credit Levy Mill Levy 15.9560000* 15.9960000 10 3030000 6.3050000 3 1790000 Amount Values $24.59 AG -GRAZING LAND $24.63 Total $15.86 $9.71 $4.89 51.7390000 $79.68 Actual Assessed $5,848 $1,540 $5,848 $1,540 ALL TAX LIEN SALE AMOUNTS ARE SUBJECT TO CHANGE DUE TO ENDORSEMENT OF CURRENT TAXES BY THE LIENHOLDER OR TO ADVERTISING AND DISTRAINT WARRANT FEES. CHANGES MAY OCCUR AND THE TREASURER'S OFFICE WILL NEED TO BE CONTACTED PRIOR TO REMITTANCE AFTER THE FOLLOWING DATES: PERSONAL PROPERTY, REAL PROPERTY, AND MOBILE HOMES - AUGUST 1. TAX LIEN SALE REDEMPTION AMOUNTS MUST BE PAID BY CASH OR CASHIER'S CHECK. POSTMARKS ARE NOT ACCEPTED ON TAX LIEN SALE REDEMPTION PAYMENTS. PAYMENTS MUST BE IN OUR OFFICE AND PROCESSED BY THE LAST BUSINESS DAY OF THE MONTH. Weld County Treasurer's Office 1400 N 17th Avenue PO Box 458 Greeley, CO 80632 Phone: 970-400-3290 Pursuant to the Weld County Subdivision Ordinance, the attached Statement of Taxes Due issued by the Weld County Treasurer, are evidence of the status as of this date of all property taxes, special assessments, and prior tax liens attached to this account. Current year's taxes are due but not delinquent. Date: I IZ f 7i� f 1400 N. 17th Avenue, Greeley, CO 80631 or PO Box 458, Greeley, CO 80632. (970) 400-3290 Page 1 of 1 Hello