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Home My WebLink About20241200.tiffUSE BY SPECIAL REVIEW (USR) APPLICATION FOR PLANNING DEPARTMENT USE: AMOUNT $ APPLICATION RECEIVED BY DATE RECEIVED: CASE # ASSIGNED: PLANNER ASSIGNED: PROPERTY INFORMATION Is the property currently in violation? ✓ No I Yes Violation Case Number: Parcel Number: o o 4 3 - 2 6 _2 _0 0 0 0 3 Site Address: 33988 County Road 136 Grover, Colorado 80729 Legal Description: Southeast Quarter Section: 26 , Township fit N, Range 63 Within subdivision or townsite? O No / II Yes Name: Water (well permit # or water district tap #): N/A W Zoning District: A AG Acreage: 270.21 S ewer (On -site wastewater treatment system permit # or sewer account #): N/A Floodplain No I Ill Yes Geological Hazard No / 11Yes Airport Overlay No / aes P ROJECT U SR Use being applied for: Hereford Ranch Compressor Site N ame of proposed business: Rockies Express Pipeline LLC P ROPERTY OWNER(S) (Attach additional sheets if necessary.) N ame: Brian Anderson Company: Peters 313 Ranch, Inc P hone #: 970-895-2305 Email: brian.anderson©grainmillers.com Street Address: P.O. BOX M, Carpenter, WY City/State/Zip Code: Carpenter, WY 82054 APPLICANT/AUTHORIZED AGENT 'Authorization Form must be included if there is an Authorized Arent) N ame: Crystal Heter Company: Rockies Express Pipeline P hone #: 303-908-1607 Email: crystal.heter@tallgrass.com Street Address: 370 Van Gordon Street City/State/Zip Code: Lakewood, Colorado 80228 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. Ef 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 authoritx to sign �grjthe corporation. At 30 023 Sigyl�t�frest/tray Print Print l�E�P1` JP� PSI' �Y ate Signature Date 07122 9 DEPARTMENTS OF PLANNING BUILDING, DEVELOPMENT REVIEW AND ENVIRONMENTAL HEALTH 1402 NORTH 17TH AVENUE PO BOX 758 GREELEY CO 80632 AUTHORIZATION FORM . c 3ainti I, (We), - o Ce° , give permission to 1!1, a CK?es _ Ex5 tpc/intLL( (Owner please print) � (Authorized Agent/Applicant—please print) to apply for any Planning, Building, Access, Grading or OWTS permits on our behalf, for the located at (address or parcel number) below:property f 00 �� a6 a00013 Legal Description: Suit J �t Sfiatirfuer ofQ , Range - Section 26 , Township � P Subdivision Name: WoJ, Lot Nik I7 Property Owners Information: Address: P otif'arcry Phone: 3 11 qo Cl 1 o fer E-mail: Authorized Agent/Applicant Contact Information: Address: 3 7 0 WIL, &co rat> tiA, V r� Phone: � ©ilea" E -Mail: �a ea 59 Block AM 4 c - /AO, �f( l�. #11 � �C r6� ) , ac) citir% n -49 r Correspondence to be sent to: Owner a Authorized Agent/Applicant by: Mail Email Additional Info: I (We) hereby certify, under penalty of perjury and after carefully reading the entire contents of this document, that the information stated above is true and correct to the best of my (our) knowledge. g Offer Signature Owner Signature Subscribed and sworn to before me this day of C)1 -1? -103, My commission expires 07/22 TIERCE WEAVER NOTARY PUBLIC STATE OF COLORADO NOTARY ID 20224027869 MY COMMISSION EXPIRES JULY 18, 2026 20 6.3 by Notary Public 11 OFFICE OF THE SECRETARY OF STATE OF THE STATE OF COLORADO CERTIFICATE OF DOCUMENT FILED I, Jena Griswold , as the Secretary of State of the State of Colorado, hereby certify that, according to the records of this office, the attached document is a true and complete copy of the Articles of Incorporation with Document # 19871302186 of PETERS 313 RANCH, INC. Colorado Corporation (Entity ID # 19871302186 ) consisting of 6 pages. This certificate reflects facts established or disclosed by documents delivered to this office on paper through 08/16/2023 that have been posted, and by documents delivered to this office electronically through 08/18/2023 a, 10:55:21. 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 08/18/2023 @ 10:55:21 in accordance with applicable law. This certificate is assigned Confirmation Number 15245 809 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 cate 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 necessary 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." r f aD APR'75 ARTICLES OF INCORPORATIOSTATE "UE COLORADO OF DEPT. OF STATE PETERS 313 RANCH, INC. ARTICLE I. NAME That the name of the Corporation shall be PETERS 313 RANC H , I NC . ARTICLE I I . DURATION: That the duration of the Corporation shall be perpetual. ARTICLE III. PURPOSE: Section A. That the nature of the business of the Cor- poration and the objects and purposes to be transacted, promoted and carried on by it are: 1. To acquire farm properties and other real es- tate, by purchase, lease or otherwise, to improve and develop the same, and thereon to plant, sow, cultivate and harvest grains, hay, forage, vegetables, fruits, flo- wers and all kinds of farm products and produce of the soil. To breed, raise, buy, pasture, prepare for market, exhibit, sell, and deal in livestock of all kinds. To engage in dairying. To purchase, sell and trade-in farming and agricultural machinery and supplies of all kinds. To acquire and maintain farming and delivery vehicles and all other conveniences and equipment suitable for the vending of agricultural products and services. In general to con- duct in all their several departments and branches, the business of farmers, custom farmers, dairymen, and stock raisers, and to do everything incidental or conductive to the full accomplishment of the foregoing objects. 2. To acquire, hold, own, lease, improve, manage, operate, develop, erect improvements upon, and dispose of real property including improvements and businesses thereon. 3. To do everything necessary, proper, advisable or convenient for the accomplishment of the purposes hereinabove set forth and to do all other things inci- dental thereto or connected therewith, which are not forbidden by the laws of the State of Colorado. 4. To carry out the purposes hereinabove set forth in any state, territory, district or possession of the United States or in any foreign country, in accord with the laws of said state, territory, district or possession or foreign country. Section B. Subject to any specific written limitation or restrictions imposed by the laws of the State of Colorado, or by these Articles of Incorporation. The Corporation shall have all the powers specified in the Colorado Cor- poration Code. Section C. In furtherance and not in limitation of the powers conferred by the laws of Colorado, the Corporation shall have the power to borrow money, to purchase, build, lease, or otherwise acquire, own, hold, use, maintain, operate or otherwise manage or control, sell, exchange, lease, mortgage, pledge or otherwise dispose of property of any kind or character, real, persona], mixed, tangible or intangible, necessary, useful or convenient therefore, and to acquire, hold mortgage, pledge or dispose of shares, bonds, and other evidences of indebtedness and securities; to have and exercise all powers necessary or convenient to effect any or all of the purposes for which the Corporation is organized. ARTICLE IV. ARTICLE V. STOCK: Section A. There shall be 50,000 shares of no par capital stock authorized, and all stock shall be of one class. Section B. Stockholders shall be entitled to receive when and as declared by the Board of Directors, divi— dends payable in either cash, property or in shares of capital stock of the Corporation. Section C. Stockholders shall be entitled to one vote for each share of capital stock they own at meetings of stockholders, and cumulative voting shall not be permitted in the election of directors. RESTRICTION ON TRANSFER OF STOCK: Any stockholder, including heirs, executors, or admini— strators of deceased stockholders, desiring to sell any of the shares of the Corporation shall first offer said shares to the Corporation and then to other stockholders in the following manner: Section A. Such stockholder shall give written notice to the Board of Directors of his intention to sell, the num- ber of shares to be sold, the terms upon which the sale is to be made. The Corporation shall have thirty days from the receipt of such notice to notify such stockholder of its intent to exercise the option and after such notifica- tion, ten days to tender the purchase price. Such price may be authorized by the Board of Directors without any action by the shareholders Section B. If the Corporation does not exercise the Qp— tion, then the Board of Directors shall offer, upon the same terms, any such shares to stockholders of record, who shall have ten days to notify the Board of Directors of his acceptance of all or part of said shares and ten— der therewith the purchase price. If more than one stock- holder desires to purchase said shares of the Corporation, each shall be entitled to purchase shares in the same pro— portion the shares he holds bears to the total number of shares offered for sale. Section C. Valuation for the shares offered for sale shall be the consideration expressed in dollars as may be fixed from time to time by the Board of Directors in their minutes and shall be controlling only in respect to a sale of shares under Article V. of these Articles of Incorporation to the Corporation or a stockholder thereof. Section D. Any sale of shares of the Corporation shall be null and void unless the provisions of Article V. are strictly complied with. ARTICLE VI. ARTICLE VII. ARTICLE VIII. MEETINGS: GS Section A. Meetings of stockholders may be conducted either within or outside the State of Colorado. Section B. Meetings of the Board of Directors may be conducted either within or outside the State of Colorado. INITIAL REGISTERED OFFICE AND AGENT: Section A. The initial registered office of the Corpor— ation shall be Carpenter, Wyoming 82054. Section B. The initial registered agent of the Corpor— ation shall be Hans Peters? Carpenter, Wyoming 82054. BOARD OF DIRECTORS Section A. The initial Board of Directors shall be four. Section B. The names and addresses of the members of the Board of Directors to serve until the first annual meeting of shareholders and until their successors are elected and qualify, are as follows: ARIFICTE IX 1. 2, 3 4 0 Hans Peters Carpenter, Wyoming 82054 Hellene Peters Carpenter, Wyoming 82054 John, Peters Carpenter, Wyoming 82054 Luann Anderson ,,A Am „j Fort Morgan, Colorado 80701 Section C. The initial By --laws of the Corporation shall be adopted by its Board of Directors, and the Board of Directors shall have the power to amend the Byslaws . INCORPORATORS: The name and address of each incorporator is as follows: 1. Hans Peters Carpenter, Wyoming 2. H4llene Peters Carpenter, Wyoming 3. John Peters Carpenter, Wyoming 4. Luann Anderson 407 Wcot< Platte .M4 82054 82054 82054 AlerArtJ Fort Morgan, Colorado 80701 IN TESTIMONY F, we have set our hands and seals to this j instrument this /2-- day ofl , • r 1976. 4 zit (SEAL) )z9 - (SEAL) SEAL STATE OF COLORADO COUNTY OF WELD 5S. I , Dorothy A. Stewart, a Notary Public in and for the County of weld and State aforesaid, do hereby certify that Hans Peters, Htllene Peters, John Peters, and Luann. Anderson, all personally known to me to be the persons whose names are subscribed in the foregoing Articles of Incorporation, appeared before me this day in person and acknowledge that they signed, sealed and delivered the said instrument in writing as their free and voluntary acts, for the purposes and uses therein set forth. Given under my hand and notorial seal this day of 1976. //J Not ry Public My Commission Expires: 4-16--77 Use by Special Review (USR) Planning Questionnaire Tallgrass Responses - Hereford Ranch Compressor Station 1. Hereford Ranch Compressor Station — owned and operated by Rockies Express Pipeline LLC (REX) — new compressor station built as part of the Trailblazer Conversion Project. a. Trailblazer Pipeline Company, LLC (TPC) and Rockies Express Pipeline, LLC (REX) seek the approval of the Federal Energy Regulatory Commission (FERC) to rationalize use of regulated pipeline capacity in a manner that sustains service for existing natural gas firm transportation customers while freeing underutilized facilities for anticipated future non -jurisdictional service transporting CO2 gas for final sequestration. REX is seeking authorization from FERC pursuant to Sections 7(b) and 7(c) of the NGAto: (1) abandon capacity on the Rockies Express Pipeline (REX Pipeline) to TPC by lease and (2) construct, install, own, operate, and maintain certain facilities necessary to support the lease service. 2. The purpose of the Project is to provide continuing service to existing natural gas firm transportation customers on the Trailblazer Pipeline Facilities using underutilized jurisdictional capacity on REX while freeing the abandoned TPC Pipeline Facilities in anticipation of future non -jurisdictional service transporting CO2 for final sequestration. The Project supports efficient use of regulated facilities in interstate natural gas service and permits use of existing infrastructure to meet national ambitions concerning greenhouse gas emissions. The proposed Project would provide for 902,000 Dth/d of capacity on approximately 85 miles and 827,000 Dth/d on approximately 342 miles of the REX pipeline to allow firm shippers on the Trailblazer Pipeline access to the same receipt and delivery points as on the abandoned TPC Pipeline Facilities, subject to the same rates as currently provided in the TPC tariff. a. The Hereford Ranch Compressor Station is a new compressor station facility needed for REX to maintain existing service and take on the service from the abandoned Trailblazer Pipeline facilities. 3. The Hereford Ranch Compressor Station is located just south of the existing Summit Midstream Hereford Plant. Land use in the Project area is primarily agricultural, croplands and pastureland, with rural residential and some industrial uses mixed in along the proposed facilities. The existing mapped land use (according to the National Land Cover Dataset) for the Hereford Ranch Compressor Station is Rangeland/Herbaceous; construction of the facility would result in the long-term conversion of the rangeland/herbaceous to an industrial site. 4. The nearest residence to the Hereford Ranch Compressor Station is approximately 4,700 feet south. This Noise Sensitive Area (NSA) was evaluated for noise under the FERC guidelines and requirements and confirmed that the increase above the ambient sound levels would be minimal, and sound at the NSA would conform with FERC's permissible noise levels. 5. The Hereford Ranch Compressor Station is located in an area mapped as rangeland/herbaceous and is located directly south of the existing Summit Midstream Hereford Plant. Additionally, there are multiple other oil and gas facilities (well pads, tank batteries, etc.) in the area directly adjacent and surrounding the Hereford Ranch Compressor Station. Other land uses in the area include rangeland/pastureland and scattered rural residences. 6. REX will operate and maintain the proposed compressor stations in accordance with USDOT requirements and standard procedures designed to ensure the integrity and safe operation of the facilities and to maintain firm natural gas transportation service. In addition to infrequent on -site operations and scheduled maintenance activities, the compressor stations would be linked to a central control system through a Supervisory Control and Data Acquisition (SCADA) system, which would monitor the pipeline system on a 24 -hour basis. In accordance with USDOT requirements, REX proposes to establish and follow routine maintenance and operations procedures to ensure that the stations operate safely. Standard operations at compressor stations would include such activities as the calibration, maintenance, and inspection of equipment, as well as the monitoring of pressure, temperature, and vibration data, and traditional landscape maintenance such as mowing and the application of fertilizer, etc. Standard operations would also include the periodic checking of safety and emergency equipment and cathodic protection systems. 7 REX anticipates the Project construction workforce required for the construction of the Hereford Ranch Project will be roughly 100 workers. REX anticipates that there would be no permanent employees needed to operate the new aboveground facilities for compression, metering, and regulating. 8. There would be no users, patrons, members, buyers, or other visitors to the operating compressor station facility. 9. There would be no animals allowed on the site at any time. 10. Equipment at the Herefored Ranch Compressor Station will include: a. One 1,380 horsepower (HP) compressor unit (gas) b. One 690 HP compressor unit (gas) c. One 8 -inch -diameter hot tap d. Ancillary facility equipment. 11. No existing structures are present at the proposed site location. No offices will be installed on -site. A prefabricated Power Distribution Center (PDC) building will be installed to house electrical equipment. Each of the two new compressors being installed at the site will be housed in a pre -fabricated steel building. All buildings will be designed and installed per County, State, and Federal regulations. 12. There will be onsite containment of fluids required for the maintenance and safe operation of equipment. Compressor coolant will be housed in two 50" x 60" 500 -gallon double -wall horizontal steel tanks installed at grade. Two 42" x 42" 215 -gallon fiberglass sump tanks at grade will be installed to capture all compressor drains. One 60" x 84" 1000 -gallon fiberglass tank at grade will house non -potable water for equipment maintenance. 13. Cleanup and restoration procedures would be initiated as soon as possible after backfilling or completion of construction of surface facilities. Cleanup and restoration will be performed in accordance with the FERC Plan and Procedures and other federal, state, and local agency requirements, as applicable. Final cleanup would typically involve a series of steps, including off -site waste material management and equipment removal. Restoration operations would involve surface grading and the reestablishment of natural contours and vegetation. Surplus materials from construction activities would generally be removed and managed or disposed off -site in a suitable manner. REX would use a seed mix approved by the local National Resources Conservation Service (NRCS) or as requested by the landowner. If seasonal or weather conditions are not favorable, revegetation would be delayed until favorable conditions exist. Revegetation will be accomplished in a manner compatible with preconstruction and adjacent vegetation patterns, in accordance with the Plan. All completed construction areas would be returned to their original condition as nearly as practicable, and fences would be repaired as needed. 14. The anticipated construction start of the Project is 3/1 and the in service date is June 28th 15. The existing surface type at the proposed site is undisturbed rangeland. The new site surface will be compacted #57 aggregate encompassing roughly 54,000 square feet. 16. There are no planned formal parking spaces at the facility. 17. Once constructed, the Hereford Ranch Compressor Station will have a chain -link security fence around the perimeter of the site with one gated access to the facility. 18. The existing landscaping at the site is rangeland/herbaceous. REX will re -seed with an NRCS-approved native seed mix the areas not needed for long-term operation of the compressor station. 19. REX would decommission the facility, remove all equipment and return the site to its pre - construction condition. 20. Impacts to local fire departments could include an increased number of emergency situations involving traffic accidents or work -related injuries, and an increased potential for rangeland/grassland fires. Depending on the construction schedule, fire potential could be high. Some Project construction activities, such as welding, would increase fire potential if they were to occur during the season when fire potential is greatest. However, welding activities would be confined to previously cleared areas within the Project's approved workspaces and would be conducted in accordance with accepted industry safety measures. The Project would be designed, constructed, operated, and maintained in accordance with the U.S. Department of Transportation (USDOT) Safety Standards in 49 CFR Part 192. Impacts to local fire departments are projected to be within the capacity of each department. 21. The proposed Hereford Ranch Compressor Station is consistent with the Weld County Comprehensive Plan Sec. 22-2-60. - Natural resource goals and objectives, which states: "Support responsible energy and mineral development." REX has developed the Project, and this facility, to conserve the land and minimize the impact on surrounding land and the existing surrounding land uses by locating the compressor station near other existing oil and gas facilities and infrastructure, as well as minimized the footprint of the facility as much as possible. 22. The current zoning for the proposed Hereford Ranch Compressor Station is zoned Agriculture. There is currently 2 other facilities within the same section of the proposed Hereford Ranch Compressor Station. If the life expectancy of the compressor station expires the overall facility will be returned to its original condition. 23. The proposed Hereford Ranch Compressor Station is approximately 18 miles from the Grover municipality and approximately 5 miles west of Hereford. REX will comply and communicate with any personnel necessary on any future plans of development near the proposed Hereford Ranch Compressor Station. 24. Where possible, REX chose facility locations that were located next to or near areas that had previously been developed for natural gas handling purposes and that have limited potential for environmental effects; these facility locations are sited at some distance from sensitive areas (residential areas, schools, hospitals, etc.). Most of the proposed new aboveground facilities are located in rural/agricultural areas and are generally located approximately 3-5 miles (or greater) from the nearby population centers (which include small rural towns or larger cities). The Hereford Ranch Compressor Station is not located in close proximity to schools or larger residential areas. There are several mitigation measures that have been identified by REX that will be implemented for potential air emissions and noise impacts to protect nearby populations as well as the greater populations in the Project area. Some of these mitigation measures include: Construction Mitigation Measures • Minimizing exhaust emissions from diesel and gasoline- fueled construction equipment and vehicle engines • Minimizing vehicle and equipment idling time to the extent practical during construction • Utilize dust suppression techniques to minimize fugitive dust during construction • Limiting emissions from potential surface coating by purchasing and installing most piping and structural components that have been prepared and coated in shops prior to shipment to the construction site. • REX, TPC, and TIGT will not burn any brush, slash, or materials generated from construction activities. Operational Mitigation Measures • REX will install equipment that, at a minimum, meet the emission limitations found in the applicable New Source Performance Standards (NSPS) described in Resource Report 9 or state regulations. • Engines will be equipped with oxidation catalyst systems to reduce CO, VOC, and formaldehyde emissions below appliable emission standards and permit limits • Compressor units will be of "lean burn design" and be equipped with the lowest available NOx controls per manufacturer specification. • REX will develop and implement an operation and maintenance plan consistent with the manufacturer's recommendations for good combustion practices. • REX will operate and maintain compressors according to manufacturer recommendations • REX will monitor and replace reciprocating rod packing seals based on manufacturer or regulatory requirement. • REX will conduct optical gas imagining camera surveys annually to catch and repair fugitive leaks from piping components at compressor stations. • REX will install low or intermittent bleed controllers and will conduct routine maintenance to prevent malfunctions from occurring. • REX will have enclosures (buildings) around the proposed new compressor stations to reduce noise from the facilities. • REX will install engine exhaust systems that include a silencer -catalyst system that provides the required minimum dynamic sound insertion loss (DIL) values. • REX will have unit blowdown silencers at the facilities that attenuate the unsilenced blowdown noise to the required noise levels at 300 feet from the outlet of the silencer. • REX will design flow -control valves (FCVs) to meet 90 decibels (dBA) for the full range of operating conditions at regulating and metering stations and will also cover aboveground gas piping associated with the flow -control skid with acceptable acoustical insulation. With these proposed mitigation measures in place, the proposed Project would not subject nearby communities or populations to disproportionate adverse impacts. 25. The proposed Hereford Ranch Compressor Station is not located in an A (Agricultural) Zone District, and the construction and operation of it will not impact any irrigation features. 26. The proposed Hereford Ranch Compressor Station is not located within any Overlay Zoning District or a Special Flood Hazard Area. 27. REX has included a copy of the Trailblazer Conversion Project's permit table, edited to include just those permits that apply to the Hereford Ranch Compressor Station. USE BY SPECIAL REVIEW (USR) ENVIRONMENTAL HEALTH QUESTIONNAIRE 1. 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. a. There will be no potable water on site. The site will be remotely operated. If water is needed onsite Tallgrass will truck it in. 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.) a. There is no existing or proposed sewage disposal system onsite. Tallgrass will bring in portable toilets as needed. 3. If storage or warehousing is proposed, what type of items will be stored? a. There will be no storage or warehousing on site. 4. Describe where and how storage and/or stockpile of wastes, chemicals, and/or petroleum will occur on this site. a. There will be temporary storage of waste water and coolant (Glycol/Water solution) in tanks near the SW corner of the site. 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. a. There will be no storage of fuel on site. 6. If there will be washing of vehicles or equipment on site, indicate how the wash water will be contained. a. There will be no washing of vehicles on site. The compressor equipment will be mounted on skids that have floor drains to capture wash water and pump it into storage tanks. b. Those tanks will be emptied as needed with the waste water carried to and disposed of at a licensed facility. 7. If there will be floor drains, indicate how the fluids will be contained. a. See 6a. 8. Indicate if there will be any air emissions (e.g. painting, oil storage, etc.). a. Yes there will be air emissions at the facility. The project has received a construction permit from Colorado Department of Public Health & Environment (Permit number 22WE0328). 9. Provide a design and operations plan if applicable (e.g. composting, landfills, etc.). a. The site will be operated remotely from Lakewood, CO. 10. Provide a nuisance management plan if applicable (e.g. dairies, feedlots, etc.). a. N/A 11. Additional information may be requested depending on type of land use requested. Decommissioning Plan — Tallgrass Energy — "Hereford Ranch" When the proposed Hereford Ranch Facility reaches the end of its operational life, the components will be dismantled and recycled. Tallgrass Energy's lease with the property owner, Peters 313 Ranch Inc., requires us to decommission and restore the site at our expense. The decommissioning plan would commence at the end of the lease term or in the event of twelve (12) months of non -operation. 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. Tallgrass Energy will be responsible for all decommissioning costs. Upon termination of the proposed facility, all equipment will be removed. The ground would be regraded to accommodate agricultural uses or be revegetated to 80% of pre - disturbance vegetative cover in accordance with the COGCC 1000 Series Rules. The pre - disturbance vegetation cover shall be determined by the undisturbed surrounding areas. Tallgrass Energy 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 address any concerns there may be. STORMWATER DRAINAGE REPORT FOR HEREFORD RANCH COMPRESSOR STATION WELD COUNTY, COLORADO Prepared for: TALLGRAS5 (a ENERGY Prepared by: Primoris Design & Construction, Inc. 10350 Richmond Ave, Suite 1000 Houston, Texas 77042 laz.L.41 Primoris Engineering August 15, 2023 TALLGRASS (�I Hereford Ranch CS Drainage Report Page 12 Certificate of Compliance I, Paul M. White, P.E., a registered Professional Engineer under the laws of the State of Colorado, hereby certify that the documents contained in the Stormwater Design Report herein for the Hereford Ranch Compressor Station project in Weld County, Colorado were prepared by me or under my direct supervision in accordance with the provisions of Section 8-11-40 of the Weld County Code. Paul M. White, P.E. Colorado Registration No.: PE.0048094 TALLGRASS�J1 Hereford Ranch CS Drainage Report Page 13 Table of Contents 1.0 PROJECT DESCRIPTION 4 1.1 PROJECT DESCRIPTION & LOCATION 4 1.2 NEARBY WATER FEATURES & WETLANDS 5 1.3 LAND OWNERSHIP 6 1.4 GOVERNING GUIDELINES 6 1.5 SOIL DATA & HYDROLOGIC GROUP 6 1.6 EXISTING SITE DRAINAGE 7 1.7 PROPOSED (POST -DEVELOPMENT) SITE DRAINAGE 7 2.0 METHODOLOGY 8 2.1 DRAINAGE ANALYSIS 8 2.2 DESIGN STORM EVENTS AND RAINFALL INFORMATION 8 3.0 DRAINAGE ANALYSIS 9 3.1 DRAINAGE BASIN 9 3.2 SURFACE RUNOFF COEFFICIENT (C) 9 3.3 RAINFALL INTENSITY 10 3.4 TIME OF CONCENTRATION 10 4.0 DETENTION 11 List of Tables Table 1— Surface coefficients 9 Table 2 — Comparison of Calculated Runoff Flow 11 List of Figures Figure 1: Site Location Map 4 Figure 2: Wetlands & Water Features 5 Figure 3: Site Condition & Ground Cover 7 Appendix Appendix A — Land Ownership Map 12 Appendix B — Soil Data & Hydrologic Group 13 Appendix C - Pre -Development Drainage Patterns & Topography 14 Appendix D - Post -Development Drainage Patterns & Topography (Grading Plan) 15 Appendix E - Pre -Development Hydro CAD Report 16 Appendix F - Post -Development Hydro CAD Report 17 Appendix G — Site Plan (Post -Development) 18 TALLGRASSa) Hereford Ranch CS Drainage Report Page 14 1.0 PROJECT DESCRIPTION 1.1 Project Description & Location Hereford Ranch Compressor Station is located approximately 0.08 miles (400 feet) west of County Road 71 in Weld County, Colorado. The site is categorized as a Group B location in reference to the Trailblazer Conversion Project in a rural area that is currently situated in predominately agricultural, pasture ground covering with slopes from 1% to 2%. Location: Latitude: 40°58'37.53"N Longitude: 104°23'32.21"W The proposed site development will ultimately include installation of compressors, meter skids, filter separators in addition to supporting equipment encompassing approximately 53,993 SF (1.24 Acres). The site will be graded and covered with gravel at a finished grade of 1.0% to 2% slope. Portions of the site that will not be covered with gravel will be re -seeded with native vegetation. There are no major storm drainage facilities or conveyance infrastructure at or adjacent to the project site. Anticipated drainage from the newly developed sites will be conveyed via sheet flow across the sites and discharged to meet historical drainage. An aerial showing the regional drainage scheme is provided in Figure 1 below. Proposed Hereford Ranch CS Project Site Existing Easement for the Rex (Rockies Express Pipeline) & Trailblazer Pipeline Co. FIGURE 1: SITE LOCATION MAP TALLGRASS Hereford Ranch CS Drainage Report Page 15 ENERGY The facility is a receipt meter site that receives gas from the customer (Summit Midstream Hereford Plant) and currently discharges that gas to the Trailblazer pipeline. The scope of the project will be to modify the facility to discharge gas to the REX East pipeline. The REX East pipeline operates at a higher pressure than the source facility and pressure increase using compressor units will be necessary. The brownfield station will be a booster compression station. Ancillary equipment needed to support the compressors will be added to the site. 1.2 Nearby Water Features & Wetlands A review of the National Wetland Inventory map indicates that there are no wetlands at or adjacent to the site. There are also no water features at or adjacent to the site except some small creeks. The site is located 0.5 miles northeast of Little Crow Creek (as shown in Figure 2 below). There is also a small creek 0.35 miles southeast of the site. FIGURE 2: WETLANDS & WATER FEATURES TALLGRASS�J1 Hereford Ranch CS Drainage Report Page 16 1.3 Land Ownership Property ownership data was researched through the county property records. Land surrounding the proposed site belongs to Peters 313 Ranch, LLC (Parcel ID 004326200003) as presented in Appendix A herein. The proposed and existing sites are owned and operated by Rockies Express Pipeline, Inc. (Parcel ID 004326400002). The only easement in the vicinity of the project site belongs to Tallgrass through Rockies Express Pipeline and Trailblazer Pipeline Co. for the existing Rex and Trailblazer pipelines. 1.4 Governing Guidelines This report has been prepared in accordance with Weld County Code, specifically the Drainage Policy outlined in Section 8-11-40. Design criteria for the site drainage is in accordance with the Weld County Engineering Construction Guidelines document and the Urban Drainage and Flood Control District's Urban Storm Drainage Criteria Manual (USDCM ). The site has been reviewed to determine if it falls within a Municipal Separate Storm Sewer System (MS4) area. Based on Appendix 8-E of the Weld County Code as well as discussions in the pre -develop meeting discussion, the site is not in a MS4 area or in a Non -Urbanizing drainage area. 1.5 Soil Data & Hydrologic Group In preparation of this analysis, the USGS Natural Resources Conservation Service Web Survey was reviewed. Based on the soil survey, the project sit is situated primarily on the Ascalon fine sandy loam soils (0-6% slopes). The soils on the project site are classified to be in the B Hydrologic Soil Group. A custom soil resource report for Weld County, Colorado at the project area (Area of Interest), including the hydrologic soil groups, is presented in Appendix B of this report. Hydrologic soil groups are based on estimates of runoff potential. Group B soils have a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained, or well drained soils that have moderately fine texture to moderately coarse texture. These soils have a moderate rate of water transmission. TALLGRASSa) Hereford Ranch CS Drainage Report Page 17 EN4E Re': 1.6 Existing Site Drainage The terrane at the existing site is relatively flat with slopes of approximately 1% to 2% sloping generally towards the south and southeast. The ground is sparsely covered with low grass -like vegetation. The runoff produced on the site is conveyed overland to a ditch along the private drive south of the site. Existing drainage patterns and topography is presented in Appendix C. !- � sn.--.-;--_,:,-,:._.• '14-:-.--? L FIGURE 3: SITE CONDITION & GROUND COVER r -erg oisTirrtipitw 1.7 Proposed (Post -Development) Site Drainage The proposed compressor station site will be graded at a slope of approximately 1.0% for drainage towards the south-southeast to match the historical drainage patterns. Runoff will be conveyed overland and discharge at the existing ditch along the private drive south of the site. The final (post - development) drainage patterns and site grading is presented in Appendix D. The surface will be covered with a gravel driving surface. Any areas not disturbed or covered with gravel will be re -seeded with native vegetation. TALLGRASSa) Hereford Ranch CS Drainage Report Page 18 2.0 METHODOLOGY 2.1 Drainage Analysis The project site consists of 1.24 acres. Based on the Weld County Engineering & Construction Criteria, the allowable method for determining the peak runoff for site less than 160 acres is the Ration Method. The Rational Method calculates the peak runoff ("0") in cubic feet per second as a product of the average intensity of rainfall ("I") multiplied by the area of the site ("A") in acres, times a runoff coefficient ("C") based on the surface. Analysis was performed using the traditional Ration Method formulas (Q=CIA) and verified with HydroCAD version 10.20-2d modeling software (HydroCAD® 10.20-21 © 2022 HydroCAD Software Solutions LLC). Dynamic -Storage -Inundation routing method for both pre -developed and post -developed conditions. The following assumptions were made for analysis of the drainage system: • Type III rainfall event (Weld County, Colorado) • 1 -hour storm duration • Pre-existing soil condition AMC II; neither consisting of dry or saturated soil; typical condition prior to annual flood event. 2.2 Design Storm Events and Rainfall Information The drainage system and runoff from the project site was analyzed for the pre- and post- development conditions. Rainfall data was taken from Atlas 14, published by NOAA's National Weather Service Hydro Meteorological Design Studies Center. Rainfall depths for selected events are: 1 -year, 1 -hour storm 2 -year, 1 -hour storm 5 -year, 1 -hour storm 10 -year, 1 -hour storm 25 -year, 1 -hour storm 50 -year, 1 -hour storm 100 -year, 1 -hour storm 0.72 inches 0.88 inches 1.16 inches 1.42 inches 1.81 inches 2.14 inches 2.48 inches TALLGRASS Hereford Ranch CS Drainage Report Page 19 3.0 DRAINAGE ANALYSIS ENERGY 3.1 Drainage Basin The post -development site grading is from the north-northwest side of the site towards the south- southwest. The runoff from the entire site will be collected within one basin of 1.24 acres. A detailed report of the hydraulic analysis performed by HydroCAD is provided in Appendix E (Pre - Development) and Appendix F (Post -Development). 3.2 Surface Runoff Coefficient (C) Surface coefficients based on Table 7.4 of the Colorado DOT Drainage Design Manual (Runoff Coefficients for the Rational Equation (AASHTO 2014), the surface coefficient for this project are as follows: Pre -Development: Unimproved Industrial Areas: 0.10-0.30 E> For this project and the analysis, C for pre -development is assigned as C = 0.30 Post -Development: Light Industrial Area: 0.50-0.80 E> For this project and the analysis, C for post -development is assigned as C = 0.65 I able 7.4 Runoff Coefficients for the Rational Equation (AASHTO, 2014) Type of Drainage Area Runoff Coefficient Business: Downtown area 0.70-0.95 Neighborhood areas 0.50-0.70 Residential: Single-family areas C 20-0 50 Multi -units, detached 0.40-0.60 Mufti -units, attached' 0.60-0.75 Suburban 0.25-0.40 Apartment dwelling areas 0.50-0.70 Industrial: Light areas 0.50-0.80 Heavy areas 0.60-0.90 Parks, cemeteries 0.10-0.25 Playgrounds 0.20-0.40 Railroad yard areas 0.20-0.40 Unimproved areas _ 0.10-0.30 TABLE 1 - SURFACE COEFFICIENTS TALLGRASSa) Hereford Ranch CS Drainage Report Page 110 CIdERG. For Post -Development analysis, a Manning's Roughness value of 0.15 will be used in the calculation for Tc of developed areas. The n -value used is based on discussions with engineering, experience, and analysis of graded pads with gravel cover. This roughly equates to the "n" value for overland flow across short prairie grass. Therefore, it is assumed that the surface coefficient would be similar, or slightly more, that the pre -development C value. 3.3 Rainfall intensity Rainfall intensity used in the calculated based on the values published in Atlas 14, published by NOAA's National Weather Service Hydro Meteorological Design Studies Center. Rainfall intensity for selected events: 1 -year, 1 -hour storm 2 -year, 1 -hour storm 5 -year, 1 -hour storm 10 -year, 1 -hour storm 25 -year, 1 -hour storm 50 -year, 1 -hour storm 100 -year, 1 -hour storm 3.4 Time of Concentration 0.72 inches/hr 0.88 inches/hr 1.16 inches/hr 1.42 inches/hr 1.81 inches/hr 2.14 inches/hr 2.48 inches/hr Time of Concentration (Tc) is the calculated time it takes for the entire watershed (drainage area basins) to drain from farthest point within the basin to the point of discharge. Important factors in this calculation are surface conditions, slope of the grade, and distance the runoff is expected to travel. In the pre -development state, the subject site consists of slopes ranging from 1% to 1.5% and is covered with spars grass -like brush. The surface runoff is conveyed overland. No distinct open channels have been identified on the site. The Time of Concentration (Tc) for overland flow in a small basin is calculated with the following formula: T,= 1.8 ( .1-C)D�'l. So 33 -. Where: T; = Tc because of the size of this project drainage basin. C = Surface Coefficient D = Distance of the critical path of the runoff S = Average Slope of the Basin A minimum of 10 minutes was set in HydroCAD for calculated Tc less than 10 minutes in accordance with standard engineering practice. TALLGRASSa) Hereford Ranch CS Drainage Report PagP I11 Peak flow is calculated as follows: Storm Event Surface Coefficient (C) Intensity Rainfall (I) Area (acres) Peak Runoff (cfs) Pre -Development 5-Yr; 60 -min. 0.30 1.16 1.24 0.43 10-Yr; 60 -min. 0.30 1.42 1.24 0.53 100-Yr; 60 -min. 0.30 2.48 1.24 0.92 Post -Development 5-Yr; 60 -min. 0.65 1.16 1.24 0.93 10-Yr; 60 -min. 0.65 1.42 1.24 1.14 100-Yr; 60 -min. 0.65 2.48 1.24 2.00 TABLE 2 — COMPARISON OF CALCULATED RUNOFF FLOIN The increase in flow from the pre -development conditions and the post -development will be mitigated by construction of a new detention pond and outfall. The sizing and hydrograph for the proposed detention pond is shown in the post -development HydroCAD report herein. 4.0 DETENTION Based on the calculated flows, there will be an increase in the peak runoff. The Weld County Drainage Code states that detention is required such that the 100 -year runoff is to be detained and released at a rate of the 1 -hour, 10 -year rate for non -urbanized areas. Exceptions to the detention requirements are provided for sites that meet certain criteria. A formal request is made herein for the county to waive the detention requirement for this project. Exceptions that meet the requirements for the site include: • Non -Urbanizing area where the total pre-existing and post development impervious area produces stormwater runoff of less than, or equal to, five (5) cfs for the 1 -hour, 100 -year storm event. The calculated flow difference is 1.08 cfs for the 1 -hour, 100 -year storm event. • Parcel greater than one (1) gross acre and less that five (5) acres in size. • The site has a total area of 1.24 acres. Appendix A Land Ownership Map APPENDIX A - LAND OWNERSHIP MAP PETERS 313 RANCH INC PARCEL ID 004327000004 636.573 ACRES SEC 527, T12, R63 PETERS 313 RANCH INC PARCEL ID 004326200001 117.6892 ACRES SEC 526, T12, R63 NW4 R a PETERS SHARON A PARCEL ID 004326000011 157.0444 ACRES SEC 526, T12, R63 PETERS 313 RANCH INC PARCEL ID 004326200003 270.2195 ACRES SEC S26, T12N, R63 NW4 EXISTING SITE COUNTY ROAD 136.5 C T1 COLORADO. 4 ELI a a PETERS 313 RANCH INC PARCEL ID 004335000003 315.9983 ACRES SEC S35, T12, R63 R R: _ Salk a a EXISTING SITE R PRIVATE ACCESS ROAD a �Rw HIGHPOINT OPERATING CORPORATION PARCEL ID 004326100016 52.811 ACRES SEC 526, T12, R63 NE4 R SUMMIT MIDSTREAM NIOBRARA LLC PARCEL ID OO43261OOO13 23.3446 ACRES SEC 526, T12, R63 NE4 !e - • I -SUMMIT MIDSTREAM NIOBRARA LLC PARCEL ID 004326100015 2.1886 ACRES SEC S26, T12, R6.3 NE4 SUMMIT MIDSTREAM NIOBRARA LLC PARCEL ID 004326400008 3.5509 ACRES SEC 526, T12, R63 SE4 PETERS 313 RANCH INC PARCEL ID 004326200003 270.2195 ACRES SEC 526, T12N, R63 NW4 ROCKIES EXPRESS PIPELINE LLC PARCEL ID 004326400002 1.2534 ACRES SEC 526, 112, R63 5E4 Er R -s a LOYD FARMS PARCEL ID 004325000006 628.88 ACRES SEC S25, T12, R63 PERMANENT ACCESS ROAD (PAR -001) 60' COUNTY ROAD R.O.W. COLORADO STATE OF PARCEL ID 004336000005 632.7887 ACRES SEC 536, T12, R53 R R R A 08/09/23 AC 10403 ISSUED FOR REVIEW 08/09/23 JKB DATE BY ISSUED AFE NO, DATE BY AS BUILT DESCRIPTION DATE BY APPROVED REVISIONS DATE BY ISSUED AFE NO. DATE BY AS BUILT DESCRIPTION DATE BY APPROVED REVISIONS P C Primoris Design & Construction HRC PLOT PLAN TRAILBLAZER CONVERSION PROJECT TITLE REFERENCE DRAWINGS TALLGRASS ENERGY ISSUED FOR DESIGN PROJECT NO. 10403 APPROVED FOR CONSTRUCTION DRAWING SIZE D TRAILBLAZER CONVERSION PROJECT HEREFORD RANCH INTERCONNECT AND COMPRESSOR STATION PROPERTY MAP WELD COUNTY DRAWN AC CHK. DR. JKB SCALE NTS DATE CO 08/09/2023 PROJECT MANAGER. KYLE BEVERDING FILE NO. 59005-10-007 I OF I REV A Z:\Shared\PD&C\PDC HOU\2_Projects\Tallgrass\91590-05 TPC Conversion\503 HRC — Hereford\06 Design\08 Mapping\01 Base Files\7_1357400001—HRC\59005-10-097 PROPERTY MAP.dwg 02 PM Drawin Plotted by: ABRAHAM.CORDERO Date: 8/9/2023 Hereford Ranch CS Drainage Report Page 12 TALLGRASS Appendix B Soil Data & Hydrologic Group APPENDIX B - SOIL DATA & HYDROLOGIC GROUP USDA United States Department of -ram Agriculture 11 I;I Natural Resources Conservation Service Custom Soil Resource Report for Weld County, Colorado, Northern Part Hereford Ranch, Weld County, Colorado A product of the National Cooperative Soil Survey, a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local participants L —County Road 136 i August 8, 2023 Preface Soil surveys contain information that affects land use planning in survey areas. They highlight soil limitations that affect various land uses and provide information about the properties of the soils in the survey areas. Soil surveys are designed for many different users, including farmers, ranchers, foresters, agronomists, urban planners, community officials, engineers, developers, builders, and home buyers. Also, conservationists, teachers, students, and specialists in recreation, waste disposal, and pollution control can use the surveys to help them understand, protect, or enhance the environment. Various land use regulations of Federal, State, and local governments may impose special restrictions on land use or land treatment. Soil surveys identify soil properties that are used in making various land use or land treatment decisions. The information is intended to help the land users identify and reduce the effects of soil limitations on various land uses. The landowner or user is responsible for identifying and complying with existing laws and regulations. Although soil survey information can be used for general farm, local, and wider area planning, onsite investigation is needed to supplement this information in some cases. Examples include soil quality assessments (http://www.nrcs.usda.gov/wps/ portal/nrcs/main/soils/health/) and certain conservation and engineering applications. For more detailed information, contact your local USDA Service Center (https://offices.sc.egov.usda.gov/locator/app?agency=nrcs) or your NRCS State Soil Scientist (http://www.nres.usda.gov/wps/portal/nres/detail/soils/contactus/? cid=nrcs142p2_053951). 142p2_053951). Great differences in soil properties can occur within short distances. Some soils are seasonally wet or subject to flooding. Some are too unstable to be used as a foundation for buildings or roads. Clayey or wet soils are poorly suited to use as septic tank absorption fields. A high water table makes a soil poorly suited to basements or underground installations. The National Cooperative Soil Survey is a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local agencies. The Natural Resources Conservation Service (NRCS) has leadership for the Federal part of the National Cooperative Soil Survey. Information about soils is updated periodically. Updated information is available through the NRCS Web Soil Survey, the site for official soil survey information. The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require 2 alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity provider and employer. 3 Contents Preface 2 Soil Map 5 Soil Map 6 Legend 7 Map Unit Legend 8 Map Unit Descriptions 8 Weld County, Colorado, Northern Part 10 4 -Ascalon fine sandy loam, 0 to 6 percent slopes 10 5 -Ascalon sandy loam, 5 to 9 percent slopes 11 51 Peetz gravelly sandy loam, 5 to 20 percent slopes 12 References 15 Glossary 17 4 Soil Map The soil map section includes the soil map for the defined area of interest, a list of soil map units on the map and extent of each map unit, and cartographic symbols displayed on the map. Also presented are various metadata about data used to produce the map, and a description of each soil map unit. 5 40° 59' 0" N 40° 58' 8" N M N 0 549800 550000 550200 550400 550600 550800 551000 551200 551400 551600 551800 552000 104° 24'32'W 49800 550000 550200 550400 I Map may not be valid at this sca 550600 Custom Soil Resource Report Soil Map 550800 Map Scale: 1:11,300 if printed on A landscape (11" x 8.5") sheet. Meters 0 150 300 600 900 Feet 0 500 1000 2000 3000 Map projection: Web Mercator Corner coordinates: WCtS84 Edge tics: UTM Zone 13N WGS84 6 551000 551200 551400 551600 551800 552000 104° 22' 47" W • 104° 22' 47' W 40° 59' 0" N 40° 58' 8" N Custom Soil Resource Report MAP LEGEND Area of Interest (AO!) Area of Interest (AO1) Soils EST C Soil Map Unit Polygons Soil Map Unit Lines Soil Map Unit Points Special Point Features Blowout Borrow Pit Clay Spot Closed Depression Gravel Pit Gravelly Spot Landfill Lava Flow Marsh or swamp Mine or Quarry Miscellaneous Water Perennial Water Rock Outcrop Saline Spot Sandy Spot Severely Eroded Spot Sinkhole Slide or Slip Sodic Spot L] C7 C7 C7 Li Li Ei Cc] LII Spoil Area Stony Spot Very Stony Spot Wet Spot Other Special Line Features Water Features Streams and Canals Transportation r Rails r� II Background Aerial Photography Interstate Highways US Routes Major Roads Local Roads MAP INFORMATION The soil surveys that comprise your AOI 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 County, Colorado, Northern Part Survey Area Data: Version 17, Sep 1, 2022 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 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 boundaries may be evident. 7 Custom Soil Resource Report Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 4 Ascalon fine sandy percent slopes loam, 0 to 6 501.7 85.9% 5 Ascalon sandy percent slopes loam, 5 to 9 1.9 0.3% 51 Peetz 20 gravelly percent slopes sandy loam, 5 to 80.3 13.7% Totals for Area of Interest 583.8 100.0% Map Unit Descriptions The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area. The map unit descriptions, along with the maps, can be used to determine the composition and properties of a unit. A map unit delineation on a soil map represents an area dominated by one or more major kinds of soil or miscellaneous areas. A map unit is identified and named according to the taxonomic classification of the dominant soils. Within a taxonomic class there are precisely defined limits for the properties of the soils. On the landscape, however, the soils are natural phenomena, and they have the characteristic variability of all natural phenomena. Thus, the range of some observed properties may extend beyond the limits defined for a taxonomic class. Areas of soils of a single taxonomic class rarely, if ever, can be mapped without including areas of other taxonomic classes. Consequently, every map unit is made up of the soils or miscellaneous areas for which it is named and some minor components that belong to taxonomic classes other than those of the major soils. Most minor soils have properties similar to those of the dominant soil or soils in the map unit, and thus they do not affect use and management. These are called noncontrasting, or similar, components. They may or may not be mentioned in a particular map unit description. Other minor components, however, have properties and behavioral characteristics divergent enough to affect use or to require different management. These are called contrasting, or dissimilar, components. They generally are in small areas and could not be mapped separately because of the scale used. Some small areas of strongly contrasting soils or miscellaneous areas are identified by a special symbol on the maps. If included in the database for a given area, the contrasting minor components are identified in the map unit descriptions along with some characteristics of each. A few areas of minor components may not have been observed, and consequently they are not mentioned in the descriptions, especially where the pattern was so complex that it was impractical to make enough observations to identify all the soils and miscellaneous areas on the landscape. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The objective of mapping is not to delineate pure taxonomic classes but rather to separate the landscape into landforms or 8 Custom Soil Resource Report landform segments that have similar use and management requirements. The delineation of such segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, however, onsite investigation is needed to define and locate the soils and miscellaneous areas. An identifying symbol precedes the map unit name in the map unit descriptions. Each description includes general facts about the unit and gives important soil properties and qualities. Soils that have profiles that are almost alike make up a soil series. Except for differences in texture of the surface layer, all the soils of a series have major horizons that are similar in composition, thickness, and arrangement. Soils of one series can differ in texture of the surface layer, slope, stoniness, salinity, degree of erosion, and other characteristics that affect their use. On the basis of such differences, a soil series is divided into soil phases. Most of the areas shown on the detailed soil maps are phases of soil series. The name of a soil phase commonly indicates a feature that affects use or management. For example, Alpha silt loam, 0 to 2 percent slopes, is a phase of the Alpha series. Some map units are made up of two or more major soils or miscellaneous areas. These map units are complexes, associations, or undifferentiated groups. A complex consists of two or more soils or miscellaneous areas in such an intricate pattern or in such small areas that they cannot be shown separately on the maps. The pattern and proportion of the soils or miscellaneous areas are somewhat similar in all areas. Alpha -Beta complex, 0 to 6 percent slopes, is an example. An association is made up of two or more geographically associated soils or miscellaneous areas that are shown as one unit on the maps. Because of present or anticipated uses of the map units in the survey area, it was not considered practical or necessary to map the soils or miscellaneous areas separately. The pattern and relative proportion of the soils or miscellaneous areas are somewhat similar. Alpha -Beta association, 0 to 2 percent slopes, is an example. An undifferentiated group is made up of two or more soils or miscellaneous areas that could be mapped individually but are mapped as one unit because similar interpretations can be made for use and management. The pattern and proportion of the soils or miscellaneous areas in a mapped area are not uniform. An area can be made up of only one of the major soils or miscellaneous areas, or it can be made up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example. Some surveys include miscellaneous areas. Such areas have little or no soil material and support little or no vegetation. Rock outcrop is an example. 9 Custom Soil Resource Report Weld County, Colorado, Northern Part 4 Ascalon fine sandy loam, 0 to 6 percent slopes Map Unit Setting National map unit symbol: 2t1p5 Elevation: 4,550 to 6,050 feet Mean annual precipitation: 12 to 17 inches Mean annual air temperature: 46 to 54 degrees F Frost -free period: 135 to 160 days Farmland classification: Farmland of statewide importance Map Unit Composition Ascalon and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Ascalon Setting Landform: I me rf l uves Landform position (two-dimensional): Summit, backslope Landform position (three-dimensional): Interfluve Down -slope shape: Linear Across -slope shape: Linear Parent material: Wind -reworked alluvium and/or calcareous sandy eolian deposits Typical profile Ap - 0 to 7 inches: fine sandy loam Btl - 7 to 13 inches: sandy clay loam Bt2 - 13 to 18 inches: sandy clay loam Bk - 18 to 48 inches: sandy loam C - 48 to 80 inches: sandy loam Properties and qualities Slope: 0 to 6 percent Depth to restrictive feature: More than 80 inches Drainage class: Well drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.60 to 6.00 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 10 percent Maximum salinity: Nonsaline (0.1 to 1.9 mmhos/cm) Sodium adsorption ratio, maximum: 1.0 Available water supply, 0 to 60 inches: Moderate (about 6.8 inches) Interpretive groups Land capability classification (irrigated): 3e Land capability classification (non irrigated): 4e Hydrologic Soil Group: B Ecological site: R067BY024CO - Sandy Plains Hydric soil rating: No 10 Custom Soil Resource Report Minor Components Olnest Percent of map unit: 8 percent Landform: I me rf l uves Landform position (two-dimensional): Backslope Landform position (three-dimensional): Side slope Down -slope shape: Linear Across -slope shape: Linear Ecological site: R067BY024CO - Sandy Plains Hydric soil rating: No Otero Percent of map unit: 7 percent Landform: ImerfIuves Landform position (two-dimensional): Footslope Landform position (three-dimensional): Base slope Down -slope shape: Linear Across -slope shape: Linear Ecological site: R067BY024CO - Sandy Plains Hydric soil rating: No 5 Ascalon sandy loam, 5 to 9 percent slopes Map Unit Setting National map unit symbol: 2tlmx Elevation: 3,870 to 6,070 feet Mean annual precipitation: 13 to 16 inches Mean annual air temperature: 46 to 57 degrees F Frost -free period: 135 to 160 days Farmland classification: Not prime farmland Map Unit Composition Ascalon and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Ascalon Setting Landform: ImerfIuves Down -slope shape: Linear Across -slope shape: Linear Parent material: Wind -reworked alluvium and/or calcareous sandy eolian deposits Typical profile Ap - 0 to 6 inches: sandy loam Btl - 6 to 12 inches: sandy clay loam Bt2 - 12 to 19 inches: sandy clay loam Bk - 19 to 35 inches: sandy clay loam 11 Custom Soil Resource Report C - 35 to 80 inches: sandy loam Properties and qualities Slope: 5 to 9 percent Depth to restrictive feature: More than 80 inches Drainage class: Well drained Runoff class: Medium Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.60 to 2.00 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 10 percent Maximum salinity: Nonsaline to very slightly saline (0.1 to 2.0 mmhos/cm) Sodium adsorption ratio, maximum: 1.0 Available water supply, 0 to 60 inches: Moderate (about 6.8 inches) Interpretive groups Land capability classification (irrigated): 4e Land capability classification (non irrigated): 4c Hydrologic Soil Group: B Ecological site: R067BY024CO - Sandy Plains Hydric soil rating: No Minor Components Stoneham Percent of map unit: 10 percent Landform: I me rf l uves Down -slope shape: Linear Across -slope shape: Linear Ecological site: R067BY002CO - Loamy Plains Hydric soil rating: No Manter Percent of map unit: 5 percent Landform: ImerfIuves Down -slope shape: Linear Across -slope shape: Linear Ecological site: R067BY024CO - Sandy Plains Hydric soil rating: No 51 Peetz gravelly sandy loam, 5 to 20 percent slopes Map Unit Setting National map unit symbol: 3606 Elevation: 3,500 to 6,500 feet Mean annual precipitation: 15 to 19 inches Mean annual air temperature: 48 to 50 degrees F Frost -free period: 120 to 150 days Farmland classification: Not prime farmland 12 Custom Soil Resource Report Map Unit Composition Peetz and similar soils: 80 percent Minor components: 20 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Peetz Setting Landform: Ridges, breaks Landform position (two-dimensional): Shoulder, backslope Down -slope shape: Linear Across -slope shape: Linear Parent material: Calcareous gravelly alluvium Typical profile HI - 0 to 4 inches: gravelly sandy loam H2 - 4 to 60 inches: very gravelly sand Properties and qualities Slope: 5 to 20 percent Depth to restrictive feature: More than 80 inches Drainage class: Somewhat excessively drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat): High (2.00 to 6.00 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 20 percent Available water supply, 0 to 60 inches: Low (about 3.1 inches) Interpretive groups Land capability classification (irrigated): 6e Land capability classification (non irrigated): 6e Hydrologic Soil Group: A Ecological site: R067BY063CO - Gravel Breaks Hydric soil rating: No Minor Components Wages Percent of map unit: 10 percent Hydric soil rating: No Altvan Percent of map unit: 5 percent Hydric soil rating: No Ascalon Percent of map unit: 3 percent Hydric soil rating: No Bushman Percent of map unit: 2 percent Hydric soil rating: No Hereford Ranch CS Drainage Report Page 13 TALLGRASS Appendix C Pre -Development Drainage Patterns & Topography APPENDIX C - PRE -DEVELOPMENT DRAINAGE PATTERNS & TOPOGRAPHY 1'1 -----v - -�-,__ _ 'rte —v _ - 5 f j i�i7 �n _ _54-40 00 - 1.Iu - 5443.00 5442.OU ° Ji f - 39--5433,,o20.00 JTiJI X111 0� / l I1 C . 1. /4 LIB 1 i 0 r. g.0 N., 0 5� c,1('54�24.00 a v O Scale: 1 = 4D SITE LIMITS 5424.00 PROJECT SITE 5ar)� 5424.0' 5424.67 5424. Do 0 rD 4 Tallgrass Energy Hereford Ranch Compressor Station Project Existing Topography & Drainage Pattern Project site & Limits of Dieturbanco NG NOTES: TN E. 600°00' E. 550°00' E. 500°00' E. 450°00' E. 400°00' E. 350°00' E. 300°00' E. 250°00' E. 200°00' E. 150'00' E. 100°00' E. 50°00' E. 0°00' e a 0 / LAT. N40°58138.4298" LON. W104'23'34.1803" I 1 1 i I 1 I PROPOSED SITE LIMITS d II vQ,II II _ LAT. N40°58'38.4015" LON. W104'23'31.1821" CP-2 SEE DRA%c NOTE 3 II II II II II I`�I II _ II II II 11 _ O X e 0 O O Ij LAT. N40'58'36.2563" LON. W104'23'34.2161" 0 O O N S LAT. N40'58'36.6469" LON. W104'23'31.2104" O (N 4 • I IF ♦ • D S. • EXISTING FENCE W 1 CP-2 SEE DRAWING NOTE 3 u CP-3 SEE DRAWING NOTE 3 e LAT. N40°58'38.6352" LON. W104°23'29.9809" 9 6 0 Q a r TT CP-1 SEE DRAWING NOTE 3 �o a N. 300°00' 5V2 N. 350°00 N. 400'00' A. 26/07/23 DG TBD ISSUED FOR REVIEW 26/07/23 PMW ADATE BY AFE NO. DATE BY DESCRIPTION DATE BYDATE- " -BY AFE NO DATE BY DESCRIPTION MATE BY APPROVED NO AS BUILT NO ISSUED AS BUILT ISSUED APPROVED 5423. O O u ) Z LAT. N40'58'36.2163" LON. W104°23'29.9878" oTIToi O O O Rn IC) LL� R'C Prlmorls 0eslp n & Co nstru ctlon 6101 S BROADWAY AYE SUIE 200 10.83. 1X 75703 PH: (903) 739-9400 ms DOWIOIT Is DE PUP PROEM CF MIM SCC 1a s[ds11M1WRl nc IT 0 DE USED SMELT FO DE r'Mt t Iw nil IT Is RPol9Ho RDMLWCIRK DPPHHG W WINO "P[CRY !A IQP[CRY Is PPRH8Ia. O 0 co I 1 I I C TITLE O 1. EAL WORLD GEOGRAPHIC COORDINATES GIVEN ON THIS DRAWING ARE ASED ON THE NAD83 COLORADO STATE PLANES, CENTRAL ZONE, US FOOT OORDINATE SYSTEM. 2. ROJECT GRID SYSTEM COORDINATES ARE SET BY ALIGNING CONTROL POINTS OWN BELOW IN THE MENTIONED COORDINATE SYSTEM ABOVE. 3. TE VERTICAL AND HORIZONTAL CONTROLS ARE AS FOLLOWS D83 COORDINATES AND TRUE ELEVATIONS: P-1: ATITUDE: N40'58' 38.201" DNGITUDE: W104° 23' 27.367" EVATION: 5422.08' - 2: TITUDE: N40° 58' 37.187" NGITUDE:W104' 23' 29.190" EVATION: 5423.86' - 3: TITUDE: N40'58' 36.696" NGITUDE: W104° 23' 30.760" EVATION: 5423.71' PROJ CT COORDINATES - 1• : b34..54/ I E: 300.00' ELEVATION: 5422.08' CP-2: N: 498.00' E: 195.80' ELEVATION: 5423.86' CP-3: N: 377.83' E: 144.82' ELEVATION: 5423.71' LEGEND: SURVEY CONTROL POINT EXISTING CONTOUR S 10 TALLGRASS .6>i) Leading Energy Solutions ISSUED FOR DESIGN APE. NO. TBD APPROVED FOR CONSTRUCTION DRAWING SIZE D HEREFORD RANCH COMPRESSION STATION CIVIL EXISTING SITE CONDITIONS WELD COUNTY COLORADO DRAWN DG CHK. DR. PMW PROJECT MANAGER A. MARSANO SCALE = 40' FILE ND. pa,- 13/07/23 501.4374.200.0002 1 OF 1 REV A O N CJ r4 O c 0) 0 r7 0 i 0 DU C) d\PD&C\PDC HOU\2_Projeets\Tallgrass\91590-05 N N r N O CD CD O -o REVISIONS REVISIONS REFERENCE DRAWINGS 0 d U.S. Fish and Wildlife Service limp AWIR]f'1 U ): ' EUVPC I August 6, 2023 Wetlands Estuarine and Marine Deepwater Estuarine and Marine Wetland 1 National Wetlands Invento Freshwater Emergent Wetland Freshwater Forested/Shrub Wetland Freshwater Pond Hereford CS Topo Lake Other Riverine This map is for general reference only. The US Fish and Wildlife Service is not responsible for the accuracy or currentness of the base data shown on this map. All wetlands related data should be used in accordance with the layer metadata found on the Wetlands Mapper web site. National Wetlands Inventory (NWI) This page was produced by the NWI mapper Hereford Ranch CS Drainage Report Page 14 TALLGRASS Appendix D Post -Development Drainage Patterns & Topography (Grading Plan) APPENDIX D - POST -DEVELOPMENT DRAINAGE PATTERNS & TOPOGRAPHY (GRADING PLAN) N E. 10Q° OQ' E. 50°00' E. 0°00' E. 450°00' E. 400°00' E 350°00' E. 300°00' E. 250°00' E. 200° 00' E. 150°00 a FG 5425.90 LAT. N40°58'38.4607" LON. 00104°23'34.0935" r ssI, 4'4sr 8 m PROPOSED FENCING 4 S424 S4D4 2S ill///,m)))ill) ) COMPRESSOR PADS TO BE BUILT UP 6" ABOVE THE FINISHED GRADE AND GRADED FOR POSITIVE DRAINAGE AWAY FOR THE PAD I./MI r //Min in FG 5423.94 LAT 40°58'36.2872" LON. i'.04°23'34.1294" m �I in I-,7 Z PROPOSED FENCING r 0 0 0 Z Q -)42§5 -- c,) S PROPOSED SITE LIMITS FG 5425.00 LAT, N40°58'37.0067" LON. W104°23132.9733" 53.993.6 SF (1.24 Acres) Propose Site (1.24 Acres) COMPRESSOR PAD FG 5423.15 LAT. N40°58'36.5306" - LON. W104°23132..3419" mp FG 5422.40 LAT. N40'58'36.0157" LON. W1014°23'33./5202" FG 5426.28 / , J N40°58'36.0760" LON. W104°23132.6967" 0 0 C N Z , PROPOSED FENCING FG 5424.74 LAT. N40°58'36.9695" LON. W104°23'32.4004" COMPRESSOR PAD \ V PROPOSED ENTRANCE ROAD. 20 FT WIDE_ 4 FG 5423.19 LAT. N40°58'36.5621" LON. W104°23'31,9529" FG 5425.76 —LAT. N40°58'36.1107" LON. W104°23'32.0845" 1-5423 C C S C r7 Z 0 0 `o rr] Z FG 5424.90 LAT. N40°58138.4322" �LON_ W104°23'31.0954" 1 EXISTING FENCE Q FG 5423.12 LAT. N40°58'36.6776" LON. W104°23'31.1242" a Q C 0 0 Existing Site CP-3 SEE DRAWING NOTE 3 3itie/r PROPOSED SWALE 5424 5425.30 LAT. N40°58'36.1528" LON. W104°23'31.4031" A 26/07/23 DG TBD', ISSUED FOR REVIEW 26/07/23 PMW ND: DATE BY AFE N9- DATE BY DESCRIPTION DATE BY DATE BY AFE NO, DATE BY DESCRIPTION DATE BY APPROVED ISSUED AS BUILT NO ISSPED. AS BUILT APPROVED - REVISIONS REVISIONS 0 0 0 0 4 0 10 R'C Prlmoris Deakin & Construction 6101 5. BROADWAY AVE. SUITE 200 TILER. TA 75763 PH (905) 75D-9900 D ° .4 a ( 0 +l! (PG 5423.19 LAT. N40°58'36.6659" LON. W104°23'29.8942" 4 rs4 33 CP-2 SEE DRAWING NOTE 3 EXISTING it DIA CULVERT v FG 5422.69 LAT- N40°58'36.2470" LON. W104°23'29.9011" FG 5421.67 LAT. N40°58'36.2898" LON. W104°23'30.0519" NB m(HOll sin ng< ?ENO P PPUMR EOM a R5WJLIRI. rc n Is Th EE MED 9161 FOB THE luPPOSE POP M) I I15 PDPPIJED FPPIWPII I. area cB 1PeX5RA MEAD 9P IPDFDR1 SFg161D7 0 0 0 0 i) N 550°x0 ► CP-1 SEE DRAWING NOTE 3 0 0in 0 0 u) 41 Q v i n t 4 CJ TITLE REFERENCE DRAWINGS DRAWING NOTES: 1. FOR CIVIL GENERAL NOTES SEE DRAWING 501-4374-200-0001- 2. FOR PROJECT CONTROL POINTS AND COORDINATE INFORMATION SEE DRAWING NOTES ON DRAWING 501-4374-200-0002. 3. ALL ELEVATIONS SHOWN ON THIS DRAWING ARE TRUE ELEVATIONS U.N.O. 4CONTRACTOR SHALL GRADE TO PROVIDE POSITIVE DRAINAGE AWAY FROM ALL FOUNDATIONS. 5_ FINAL GRADE (F.G.) ELEVATIONS ARE TOP OF SITE SURFACE. FOR GRADING DETAILS REFERENCE 501-4374-200-0020. LEGEND: SURVEY CONTROL POINT EXISTING CONTOUR PROPOSED F.C. CONTOUR DRAINAGE PATTERN SPOT ELEVATION S 100 _ 100 XX% F� LAT, LON, CUT AND FILL QUANTITIES QUANTITY SITE GRADING AREA 56,145 SQUARE FEET CUT (INCLUDES REQUIRED STRIPPING) 20 CUBIC YARDS BULK FILL REQUIRED 1,520 CUBIC YARS NOTE: CUT AND FILL QUANTITIES SHOWN ARE ESTIMATES BASED ON A. TOPOGRAPHICAL COMPARISON OF THE EXISTING GRADE ELEVATIONS AND PROPOSED FINAL GRADE ELEVATIONS. BULK FILL QUANTITY INCLUDES BASE AND SURFACE COARSE MATERIALS. FOR BREAKDOWN OF BASE AND SURFACE COARSE MATERIAL QUANTITIES SEE PAVING PLAN. FILL REQUIREMENTS ARE BASED ON GEOTECHNICAL RECOMMENDATIONS. NO COMPACTION, SHRINK, OR SWELL FACTORS HAVE BEEN INCLUDED IN QUANTITIES SHOWN. QUANTITIES DO NOT INCLUDE CUT AND FILL REQUIRED FOR FOUNDATION EXCAVATION OR EXISTING AREAS THAT WILL BE DISTURBED DURING CONSTRUCTION. CONTRACTOR RESPONSIBLE FOR ACTUAL QUANTITIES. Lt TALLGRASS Leading Energy Solutions ISSUED FOR DESIGN AFE. NO.-TBD APPROVED FOR CONSTRUCTION DRAWING SIZE D ► Existing (Pre -Development) Drainage pattern Proposed (Post -Development) Drainage pattern HEREFORD RANCH COMPRESSOR STATION CIVIL FINAL GRADING PLAN WELD COUNTY COLORADO DRAWN DG. CHI'. DR PMIN PROJECT MANAGER A. MARSANO. SCALE FILE NO. DATE 13/07/23 501-4373-200-0020 1 OF I REV A v 0-1 C 0 0 C 0 0 C N 0 N) O C al iu C co C sa 0 tr Plotted by: DAVID.COMEZ Date: 7/25/2023 6:20 PM Drawing: 2:\Shared\PD&C\PDC HOU\2_Projects\Tallgrass\91590-05 TPC Conversion\503 Hereford Ranch CS Drainage Report Page 15 TALLGRASS Appendix E Pre -Development HydroCAD Report APPENDIX E - PRE -DEVELOPMENT HYDROCAD REPORT Hereford CS Site (1.24 Acres) N I \ (subca; Reach 2R Discharge from Site Routing Diagram for Pre -Development Analysis_ Hereford CS Prepared by Primoris Design & Construction, Printed 8/9/2023 HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Pre -Development Analysis_Hereford CS Prepared by Primoris Design & Construction HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Area (acres) Area Listing (all nodes) C Description (subcatchment-numbers) 1.240 1.240 0.30 0.30 Low slope grassy pasture (1S) TOTAL AREA Printed 8/9/2023 Page 2 Pre -Development Analysis_HerefordNe/d County_CO 5-yr Duration 60 rain, Inten=1.16 in/hr Prepared by Primoris Design & Construction Printed 8/9/2023 HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Page 3 Summary for Subcatchment 1S: Hereford CS Site (1.24 Acres) Runoff = 0.44 cfs @ 0.70 hrs, Volume Routed to Reach 2R : Discharge from Site 0.036 af, Depth= 0.35" Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-3.00 hrs, dt= 0.01 hrs Weld County_CO 5-yr Duration=60 min, Inten=1.16 in/hr Area (ac) C Description 1.240 0.30 Low slope grassy pasture 1.240 100.00% Pervious Area Tc Length (min) (feet) Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 41.5 300 0.0100 0.12 Sheet Flow, U) a O 0.48 0.44= 0.42: 0.4 _-- 0.38: 0.36 - 0.34 0.32= 0.3 0.28: 0.26=-- 0.24= 0.22 0.2=- 0.18- 0.14 0.12=- 0.1;- 0.084- 0.02: 0 n= 0.160 P2= 2.00" Subcatchment 1S: Hereford CS Site (1.24 Acres) Hydrograph Time (hours) f 0.44 cfs _ weidIcIountyIcoI5itI Duration 80 mini= Inten 1.16 in/hr Runoff -Area t.-240 ac Runoff Volume OO36 of Runoff Depth O.35' Flow Length 3OO'. Slope OO1 00 Ic 41.5 min C=0.30 3 Pre -Development Analysis_HerefordNe/d County CO 5-yr Duration 60 rain, Inten=1.16 in/hr Prepared by Primoris Design & Construction Printed 8/9/2023 HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Page 4 Summary for Reach 2R: Discharge from Site Inflow Area = 1.240 ac, 0.00% Impervious, Inflow Depth = 0.35" for 5-yr event Inflow = 0.44 cfs @ 0.70 hrs, Volume= 0.036 of Outflow = 0.44 cfs @ 0.70 hrs, Volume= 0.036 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-3.00 hrs, dt= 0.01 hrs Reach 2R: Discharge from Site Hydrograph 0.48 _ 0.464- 0.444- 0.42: 0.44 0.38: - 0.36 0.34E- 0.32= 0.3= 0.28: - 0.26= 0.24: 0.22:- 0.2= 0.18=- 0.16-- 0.14: 0.12=- 0.1= 0.084- 0.064- 0.02: 0 0 Inflow AreaT.246 ac - Time (hours) -f 1 2 3 Inflow Outflow Pre -Development Analysis_HereforWe/d County_CO 10-yr Duration 60 rain, Inten=1.42 in/hr Prepared by Primoris Design & Construction Printed 8/9/2023 HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Page 5 Summary for Subcatchment 1S: Hereford CS Site (1.24 Acres) Runoff = 0.53 cfs @ 0.70 hrs, Volume Routed to Reach 2R : Discharge from Site 0.044 af, Depth- 0.43" Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-3.00 hrs, dt= 0.01 hrs Weld County_CO 10-yr Duration=60 min, Inten=1.42 in/hr Area (ac) C Description 1.240 0.30 Low slope grassy pasture 1.240 100.00% Pervious Area Tc Length (min) (feet) Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 41.5 300 0.0100 0.12 Sheet Flow, n= 0.160 P2= 2.00" Subcatchment 1S: Hereford CS Site (1.24 Acres) Hydrograph 0.55 0.5 0.45 0.4 0.35 -►- 4- 0.3 o u` 0.25--- 0.2- 0.15- 0.1-- - 0.05 Time (hours) Weld County_COW-yr Duration -60 min, inten 1.42 in/hr Runoff Area I .240 ac Runoff Volume=O.044 of Runoff Depth 0.43° Flow Length 300' Slope 0.0100 2 Tc 4t5 min C=0.30 3 Pre -Development Analysis_HereforWe/d County CO 10-yr Duration 60 rain, Inten=1.42 in/hr Prepared by Primoris Design & Construction Printed 8/9/2023 HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Page 6 Summary for Reach 2R: Discharge from Site Inflow Area = 1.240 ac, 0.00% Impervious, Inflow Depth = 0.43" for 10-yr event Inflow = 0.53 cfs @ 0.70 hrs, Volume= 0.044 of Outflow = 0.53 cfs @ 0.70 hrs, Volume= 0.044 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-3.00 hrs, dt= 0.01 hrs Reach 2R: Discharge from Site Hydrograph 0.55 - 0.45- - 0.4-- - 0.35- U - 0.3 _o U- 0.25- 0.2- 0.15- Inflow Area 1.240 ac Time (hours) 2 3 Inflow Outflow Pre -Development Analysis_Heref Weld County_CO 100-yr Duration 60 rain, Inten=2.48 in/hr Prepared by Primoris Design & Construction Printed 8/9/2023 HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Page 7 Summary for Subcatchment 1S: Hereford CS Site (1.24 Acres) Runoff = 0.93 cfs @ 0.70 hrs, Volume Routed to Reach 2R : Discharge from Site 0.077 af, Depth= 0.74" Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-3.00 hrs, dt= 0.01 hrs Weld County_CO 100-yr Duration=60 min, Inten=2.48 in/hr Area (ac) C Description 1.240 0.30 Low slope grassy pasture 1.240 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 41.5 300 0.0100 0.12 Sheet Flow, U) 4- a O n= 0.160 P2= 2.00" Subcatchment 1S: Hereford CS Site (1.24 Acres) Hydrograph 0.93 cfs Weld County_CO 100-yr Duration 60 min, Inten 2.48 in/hr Runoff Area 1.240 ac Runoff Volume=0.077 af Runoff Depth 0.74" Flow Length 300' Slope 0.0100 '/' Tc 41.5 min C=0.30 a i 1 Time (hours) 2 3 — Runoff Pre -Development Analysis_Heref Weld County CO 100-yr Duration 60 rain, Inten=2.48 in/hr Prepared by Primoris Design & Construction Printed 8/9/2023 HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Page 8 Summary for Reach 2R: Discharge from Site Inflow Area = 1.240 ac, 0.00% Impervious, Inflow Depth = 0.74" for 100-yr event Inflow = 0.93 cfs @ 0.70 hrs, Volume= 0.077 af Outflow = 0.93 cfs @ 0.70 hrs, Volume= 0.077 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-3.00 hrs, dt= 0.01 hrs Reach 2R: Discharge from Site Hydrograph 1 2 3 Inflow Outflow Time (hours) Pre -Development Analysis_Heref Weld County_CO 200-yr Duration 60 rain, Inten=2.85 in/hr Prepared by Primoris Design & Construction Printed 8/9/2023 HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Page 9 Summary for Subcatchment 1S: Hereford CS Site (1.24 Acres) Runoff = 1.07 cfs @ 0.70 hrs, Volume Routed to Reach 2R : Discharge from Site 0.088 af, Depth= 0.86" Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-3.00 hrs, dt= 0.01 hrs Weld County_CO 200-yr Duration=60 min, Inten=2.85 in/hr Area (ac) C Description 1.240 0.30 Low slope grassy pasture 1.240 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 41.5 300 0.0100 0.12 Sheet Flow, n= 0.160 P2= 2.00" Subcatchment 1S: Hereford CS Site (1.24 Acres) Hydrograph 1.07 cfs Weld County_CO 200-yr Duration 60 min, Inten 2.85 in/hr Runoff Area 1.240 ac Runoff Volume=0.088 of Runoff Depth 0.86" Flow Length 300' Slope 0.0100 '/' Tc 41.5 min C=0.30 1 Time (hours) 2 3 Pre -Development Analysis_Heref Weld County CO 200-yr Duration 60 rain, Inten=2.85 in/hr Prepared by Primoris Design & Construction Printed 8/9/2023 HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Page 10 Summary for Reach 2R: Discharge from Site Inflow Area = 1.240 ac, 0.00% Impervious, Inflow Depth = 0.86" for 200-yr event Inflow = 1.07 cfs @ 0.70 hrs, Volume= 0.088 af Outflow = 1.07 cfs @ 0.70 hrs, Volume= 0.088 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-3.00 hrs, dt= 0.01 hrs Reach 2R: Discharge from Site Hydrograph 1 2 3 Inflow Outflow Time (hours) Pre -Development Analysis_Heref Weld County_CO 500-yr Duration 60 rain, Inten=3.39 in/hr Prepared by Primoris Design & Construction Printed 8/9/2023 HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Page 11 Summary for Subcatchment 1S: Hereford CS Site (1.24 Acres) Runoff = 1.27 cfs @ 0.70 hrs, Volume Routed to Reach 2R : Discharge from Site 0.105 af, Depth= 1.02" Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-3.00 hrs, dt= 0.01 hrs Weld County_CO 500-yr Duration=60 min, Inten=3.39 in/hr Area (ac) C Description 1.240 0.30 Low slope grassy pasture 1.240 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 41.5 300 0.0100 0.12 Sheet Flow, 4- a n= 0.160 P2= 2.00" Subcatchment 1S: Hereford CS Site (1.24 Acres) Hydrograph 1.27 cfs Weld County_CO 500-yr Duration 60 min, inten 3.39 in/hr Runoff Area 1.240 ac Runoff Volume=0.105 of Runoff Depth 1.02" Flow Length 300' Slope 0.0100 Tc 41.5 min C=0.30 1 Time (hours) 2 3 Pre -Development Analysis_Heref Weld County CO 500-yr Duration 60 rain, Inten=3.39 in/hr Prepared by Primoris Design & Construction Printed 8/9/2023 HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Page 12 Summary for Reach 2R: Discharge from Site Inflow Area = 1.240 ac, 0.00% Impervious, Inflow Depth = 1.02" for 500-yr event Inflow = 1.27 cfs @ 0.70 hrs, Volume= 0.105 of Outflow = 1.27 cfs @ 0.70 hrs, Volume= 0.105 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-3.00 hrs, dt= 0.01 hrs Reach 2R: Discharge from Site Hydrograph 1 2 3 Inflow Outflow Time (hours) Pre -Development Analysis_HerefAleld County_CO 1000-yr Duration 60 min, Inten=3.81 in/hr Prepared by Primoris Design & Construction Printed 8/9/2023 HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Page 13 Summary for Subcatchment 1S: Hereford CS Site (1.24 Acres) Runoff = 1.43 cfs @ 0.70 hrs, Volume Routed to Reach 2R : Discharge from Site 0.118 af, Depth= 1.14" Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-3.00 hrs, dt= 0.01 hrs Weld County_CO 1000-yr Duration=60 min, Inten=3.81 in/hr Area (ac) C Description 1.240 0.30 Low slope grassy pasture 1.240 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 41.5 300 0.0100 0.12 Sheet Flow, U) 4- a 0 u_ n= 0.160 P2= 2.00" Subcatchment 1S: Hereford CS Site (1.24 Acres) Hydrograph 1.43 cfs Weld County_CO 1000-yr Duration 60 min, Inten 3.81 in/hr Runoff Area t240 ac RuncffVolume=0.118 of Runoff Depth 1.14" Flow Length 300' Slope 0.0100 Tc 41.5 min C=0.30 1 Time (hours) 2 3 Pre -Development Analysis_HerefAleld County CO 1000-yr Duration 60 min, Inten=3.81 in/hr Prepared by Primoris Design & Construction Printed 8/9/2023 HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Page 14 Summary for Reach 2R: Discharge from Site Inflow Area = 1.240 ac, 0.00% Impervious, Inflow Depth = 1.14" for 1000-yr event Inflow = 1.43 cfs @ 0.70 hrs, Volume= 0.118 of Outflow = 1.43 cfs @ 0.70 hrs, Volume= 0.118 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-3.00 hrs, dt= 0.01 hrs Reach 2R: Discharge from Site Hydrograph 1.43 cfs i U o U - Inflow Area 1.240 ac Time (hours) 2 Inflow Outflow Pre -Development Analysis_Hereford CS Prepared by Primoris Design & Construction HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Event Rainfall (inches) Multi -Event Tables Printed 8/9/2023 Page 15 Events for Subcatchment I S: Hereford CS Site (1.24 Acres) Runoff Volume Depth (cfs) (acre-feet) (inches) 5-yr 10-yr 100-yr 200-yr 500-yr 1000-yr 1.16 1.42 2.48 2.85 3.39 3.81 0.44 0.036 0.53 0.044 0.93 0.077 1.07 0.088 1.27 0.105 1.43 0.118 0.35 0.43 0.74 0.86 1.02 1.14 Pre -Development Analysis_Hereford CS Prepared by Primoris Design & Construction HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Event Inflow (cfs) Events for Reach 2R: Discharge from Site Outflow Elevation (cfs) (feet) Storage (cubic -feet) 5-yr 10-yr 100-yr 200-yr 500-yr 1000-yr 0.44 0.53 0.93 1.07 1.27 1.43 0.44 0.53 0.93 1.07 1.27 1.43 0.00 0.00 0.00 0.00 0.00 0.00 0 0 0 0 0 0 Multi -Event Tables Printed 8/9/2023 Page 16 Pre -Development Analysis_Hereford CS Prepared by Primoris Design & Construction HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Table of Contents Printed 8/9/2023 TABLE OF CONTENTS Project Reports 1 Routing Diagram 2 Area Listing (all nodes) 5-yr Event 3 Subcat 1S: Hereford CS Site (1.24 Acres) 4 Reach 2R: Discharge from Site 10-yr Event 5 Subcat 1S: Hereford CS Site (1.24 Acres) 6 Reach 2R: Discharge from Site 100-yr Event 7 Subcat 1S: Hereford CS Site (1.24 Acres) 8 Reach 2R: Discharge from Site 200-yr Event 9 Subcat 1S: Hereford CS Site (1.24 Acres) 10 Reach 2R: Discharge from Site 500-yr Event 11 Subcat 1S: Hereford CS Site (1.24 Acres) 12 Reach 2R: Discharge from Site 1000-yr Event 13 Subcat 1S: Hereford CS Site (1.24 Acres) 14 Reach 2R: Discharge from Site Multi -Event Tables 15 Subcat 1S: Hereford CS Site (1.24 Acres) 16 Reach 2R: Discharge from Site Hereford Ranch CS Drainage Report Page 16 Appendix F Post -Development HydroCAD Report APPENDIX F - POST -DEVELOPMENT HYDROCAD REPORT Hereford CS Site (1.24 Acres) N I \ (subca; Reach 2R Discharge from Site Routing Diagram for Post -Development Analysis_ Hereford CS Prepared by Primoris Design & Construction, Printed 8/9/2023 HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Post -Development Analysis_Hereford CS Prepared by Primoris Design & Construction HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Area (acres) Area Listing (all nodes) C Description (subcatchment-numbers) 1.240 1.240 0.65 0.65 Low slope grassy pasture (1S) TOTAL AREA Printed 8/9/2023 Page 2 Post -Development Analysis_HerefolvVe/d County_CO 5-yr Duration 60 rain, Inten=1.16 in/hr Prepared by Primoris Design & Construction Printed 8/9/2023 HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Page 3 Summary for Subcatchment 1S: Hereford CS Site (1.24 Acres) Runoff = 0.94 cfs @ 0.76 hrs, Volume Routed to Reach 2R : Discharge from Site 0.078 af, Depth= 0.75" Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Weld County_CO 5-yr Duration=60 min, Inten=1.16 in/hr Area (ac) C Description 1.240 0.65 Low slope grassy pasture 1.240 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 45.6 300 0.0100 0.11 Sheet Flow, a O u_ n= 0.180 P2= 2.00" Subcatchment 1S: Hereford CS Site (1.24 Acres) Hydrograph 0.94 cfs 1 2 3 5 6 7 8 I I I I Weld County_CO5-yr puration-60 mi, Inten=1.16 in/hr I I Runoff Area 1 .,240 a;c Run�ffV�lurne-0.078 of Runoff Depth 015" I I I I I I I Flow Length -300' Slope-0.0I00V' I I I I Tc45.6mifl I C=6.65 I I I 9 arres 10 11 12 13 14 15 Time (hours) - I I I 16 17 18 19 20 21 22 23 24 Post -Development Analysis_HerefolvVe/d County CO 5-yr Duration 60 rain, Inten=1.16 in/hr Prepared by Primoris Design & Construction Printed 8/9/2023 HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Page 4 Summary for Reach 2R: Discharge from Site Inflow Area = 1.240 ac, 0.00% Impervious, Inflow Depth = 0.75" for 5-yr event Inflow = 0.94 cfs @ 0.76 hrs, Volume= 0.078 of Outflow = 0.94 cfs @ 0.76 hrs, Volume= 0.078 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Reach 2R: Discharge from Site Hydrograph 0.94 cfs i U o U - 0 1 2 Inflow Area 1.240 ac 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Inflow Outflow Post -Development Analysis_Heref Weld County_CO 10-yr Duration 60 rain, Inten=1.42 in/hr Prepared by Primoris Design & Construction Printed 8/9/2023 HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Page 5 Summary for Subcatchment 1S: Hereford CS Site (1.24 Acres) Runoff = 1.15 cfs @ 0.76 hrs, Volume Routed to Reach 2R : Discharge from Site 0.095 af, Depth= 0.92" Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Weld County_CO 10-yr Duration=60 min, Inten=1.42 in/hr Area (ac) C Description 1.240 0.65 Low slope grassy pasture 1.240 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 45.6 300 0.0100 0.11 Sheet Flow, 4- a O U- n= 0.180 P2= 2.00" Subcatchment 1S: Hereford CS Site (1.24 Acres) Hydrograph 1.15 cfs 1 2 3 Weld County_CO 1-yr I , I : Duratuor60mun,H I , Inten 1.42 in/hr Runoff ;Area=1 .,240 ac Run�ffV�lurne-0.095 of 1 Runoff Depth 0.92" Flow Length -300' Slope-O.OIOOV' Tc45.6mifl C=6.6;5 I I I I 5 6 7 8 9 10 arrr-- 11 12 13 14 Time (hours) 15 16 17 18 19 20 21 22 23 24 Post -Development Analysis_Heref Weld County CO 10-yr Duration 60 rain, Inten=1.42 in/hr Prepared by Primoris Design & Construction Printed 8/9/2023 HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Page 6 Summary for Reach 2R: Discharge from Site Inflow Area = 1.240 ac, 0.00% Impervious, Inflow Depth = 0.92" for 10-yr event Inflow = 1.15 cfs @ 0.76 hrs, Volume= 0.095 of Outflow = 1.15 cfs @ 0.76 hrs, Volume= 0.095 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Reach 2R: Discharge from Site Hydrograph 0 1 2 Inflow Outflow 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Post -Development Analysis_Heref/Ve/d County_CO 100-yr Duration 60 rain, Inten=2.48 in/hr Prepared by Primoris Design & Construction Printed 8/9/2023 HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Page 7 Summary for Subcatchment 1S: Hereford CS Site (1.24 Acres) Runoff = 2.02 cfs @ 0.76 hrs, Volume Routed to Reach 2R : Discharge from Site 0.167 af, Depth= 1.61" Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Weld County_CO 100-yr Duration=60 min, Inten=2.48 in/hr Area (ac) C Description 1.240 0.65 Low slope grassy pasture 1.240 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 45.6 300 0.0100 0.11 Sheet Flow, 4- a n= 0.180 P2= 2.00" Subcatchment 1S: Hereford CS Site (1.24 Acres) Hydrograph 2.02 cfs 21- I 1 1 2 I I I I 5 6 7 8 9 10 Weld County_CO 100-yr Duration 60 min, Inten 2.48 in/hr Runoff Area 1 .240 a;c Run�ffV�luthe-0167 of _ _ _ Runoff Depth- t.61' Flow Length-SOO' Slope-O.OIOOV' Tc45.6mifl C=0.65 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Post -Development Analysis_Heref/Ve/d County CO 100-yr Duration 60 rain, Inten=2.48 in/hr Prepared by Primoris Design & Construction Printed 8/9/2023 HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Page 8 Summary for Reach 2R: Discharge from Site Inflow Area = 1.240 ac, 0.00% Impervious, Inflow Depth = 1.61" for 100-yr event Inflow = 2.02 cfs @ 0.76 hrs, Volume= 0.167 of Outflow = 2.02 cfs @ 0.76 hrs, Volume= 0.167 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Reach 2R: Discharge from Site Hydrograph 2.02 cfs U U - 0 1 2 Inflow Area 1.240 ac 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Inflow Outflow Post -Development Analysis_Heref/Ve/d County_CO 200-yr Duration 60 rain, Inten=2.85 in/hr Prepared by Primoris Design & Construction Printed 8/9/2023 HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Page 9 Summary for Subcatchment 1S: Hereford CS Site (1.24 Acres) Runoff = 2.32 cfs @ 0.76 hrs, Volume Routed to Reach 2R : Discharge from Site 0.191 af, Depth= 1.85" Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Weld County_CO 200-yr Duration=60 min, Inten=2.85 in/hr Area (ac) C Description 1.240 0.65 Low slope grassy pasture 1.240 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 45.6 300 0.0100 0.11 Sheet Flow, 2 4- a n= 0.180 P2= 2.00" Subcatchment 1S: Hereford CS Site (1.24 Acres) Hydrograph 2.32 cfs I I Weld County_CO 200-yr Duratuon 60 min, lAten 2.85 in/hr Runoff Area 1 .,240 ac Run�ffV�lutne-0191 of Runoff Depth 1.85" �loiw Length=30o'- Slope-0.0100J Tc45.6min C=0.65 - 2 3 4 5 6 7 8 9 10 arres 11 12 13 14 Time (hours) 15 16 17 18 19 20 21 22 23 24 Post -Development Analysis_Heref/Ve/d County CO 200-yr Duration 60 rain, Inten=2.85 in/hr Prepared by Primoris Design & Construction Printed 8/9/2023 HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Page 10 Summary for Reach 2R: Discharge from Site Inflow Area = 1.240 ac, 0.00% Impervious, Inflow Depth = 1.85" for 200-yr event Inflow = 2.32 cfs @ 0.76 hrs, Volume= 0.191 af Outflow = 2.32 cfs @ 0.76 hrs, Volume= 0.191 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Reach 2R: Discharge from Site Hydrograph 2 U U - 2.32 cfs Inflow Area=1.240 ac I I I I I _,_--- I I I t I 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Inflow Outflow Post -Development Analysis_Heref/Ve/d County_CO 500-yr Duration 60 rain, Inten=3.39 in/hr Prepared by Primoris Design & Construction Printed 8/9/2023 HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Page 11 Summary for Subcatchment 1S: Hereford CS Site (1.24 Acres) Runoff = 2.76 cfs @ 0.76 hrs, Volume Routed to Reach 2R : Discharge from Site 0.228 af, Depth= 2.20" Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Weld County_CO 500-yr Duration=60 min, Inten=3.39 in/hr Area (ac) C Description 1.240 0.65 Low slope grassy pasture 1.240 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 45.6 300 0.0100 0.11 Sheet Flow, seauT a n= 0.180 P2= 2.00" Subcatchment 1S: Hereford CS Site (1.24 Acres) Hydrograph F - -I I 1 1 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 1 1 I I I I I I I I I I L - -I - - L - J - - L - -I - - L - J - - I I I I I I I I 1 I I I I I I I I 1 I I I I I I I 1 1 I I I I I I 1 1 I I I I I I 1 1 I I I T t L I I Weld County_CO5Q0-yr puration 60 min, Inten 3.39 in/hr Runoff Area 1 .240 a;c Run�ffV�luthe-028 of Runoff Depth 220" I I Length I I I Flow =300' Hsi1oFe 1 Tc 45.6 min CO.65 I I j 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Runoff Post -Development Analysis_Heref/Ve/d County CO 500-yr Duration 60 rain, Inten=3.39 in/hr Prepared by Primoris Design & Construction Printed 8/9/2023 HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Page 12 Summary for Reach 2R: Discharge from Site Inflow Area = 1.240 ac, 0.00% Impervious, Inflow Depth = 2.20" for 500-yr event Inflow = 2.76 cfs @ 0.76 hrs, Volume= 0.228 af Outflow = 2.76 cfs @ 0.76 hrs, Volume= 0.228 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Reach 2R: Discharge from Site Hydrograph U U- 0 1 2 i InfIOwAtea 1.240 ac -F - I I I I I I 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Inflow Outflow Post -Development Analysis Her Weld County_CO 1000-yr Duration 60 min, Inten=3.81 in/hr Prepared by Primoris Design & Construction Printed 8/9/2023 HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Page 13 Summary for Subcatchment 1S: Hereford CS Site (1.24 Acres) Runoff = 3.10 cfs @ 0.76 hrs, Volume Routed to Reach 2R : Discharge from Site 0.256 af, Depth= 2.48" Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Weld County_CO 1000-yr Duration=60 min, Inten=3.81 in/hr Area (ac) C Description 1.240 0.65 Low slope grassy pasture 1.240 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 45.6 300 0.0100 0.11 Sheet Flow, 4- a 3 2 1 i _ n= 0.180 P2= 2.00" Subcatchment 1S: Hereford CS Site (1.24 Acres) Hydrograph 3.10 cfs t I I I I I I I t I I I I I I I I I I I I t t t I V I I t t t I V I I t t t t V I I t t t I I I I I I I I I III I I III I I I I I I I I I I � � 't% I I I I I I I Weld county_cc 1000-yr Duration 60 min, I I I I I I t t I V I I t t t I I I I I t t t t I I I I t t t t I I I I t t t I I I I I I I I I I I I I I I I 1 Inten 3.81 in/hr Runoff t Area=1.24� ac � I t I I , RundffV�Iuine =0.256 of 1 I Runoff Depth 2A8" I I I I I I I I I Flow Length -300' Slope±0.0'1.00 _'�L'_ I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I Tc 45.6 min C=0.65 I I antes 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Post -Development Analysis Her Weld County CO 1000-yr Duration 60 min, Inten=3.81 in/hr Prepared by Primoris Design & Construction Printed 8/9/2023 HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Page 14 Summary for Reach 2R: Discharge from Site Inflow Area = 1.240 ac, 0.00% Impervious, Inflow Depth = 2.48" for 1000-yr event Inflow = 3.10 cfs @ 0.76 hrs, Volume= 0.256 of Outflow = 3.10 cfs @ 0.76 hrs, Volume= 0.256 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Reach 2R: Discharge from Site Hydrograph 3.10 cfs i U o U - 0 1 2 Inflow Area F 1.240 ac 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Inflow Outflow Post -Development Analysis_Hereford CS Prepared by Primoris Design & Construction HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Event Rainfall (inches) Multi -Event Tables Printed 8/9/2023 Page 15 Events for Subcatchment I S: Hereford CS Site (1.24 Acres) Runoff Volume Depth (cfs) (acre-feet) (inches) 5-yr 10-yr 100-yr 200-yr 500-yr 1000-yr 1.16 1.42 2.48 2.85 3.39 3.81 0.94 0.078 0.75 1.15 0.095 0.92 2.02 0.167 1.61 2.32 0.191 1.85 2.76 0.228 2.20 3.10 0.256 2.48 Post -Development Analysis_Hereford CS Prepared by Primoris Design & Construction HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Event Inflow (cfs) Events for Reach 2R: Discharge from Site Outflow Elevation (cfs) (feet) Storage (cubic -feet) 5-yr 10-yr 100-yr 200-yr 500-yr 1000-yr 0.94 1.15 2.02 2.32 2.76 3.10 0.94 1.15 2.02 2.32 2.76 3.10 0.00 0.00 0.00 0.00 0.00 0.00 0 0 0 0 0 0 Multi -Event Tables Printed 8/9/2023 Page 16 Post -Development Analysis_Hereford CS Prepared by Primoris Design & Construction HydroCAD® 10.20-3c s/n 12754 © 2023 HydroCAD Software Solutions LLC Table of Contents Printed 8/9/2023 TABLE OF CONTENTS Project Reports 1 Routing Diagram 2 Area Listing (all nodes) 5-yr Event 3 Subcat 1S: Hereford CS Site (1.24 Acres) 4 Reach 2R: Discharge from Site 10-yr Event 5 Subcat 1S: Hereford CS Site (1.24 Acres) 6 Reach 2R: Discharge from Site 100-yr Event 7 Subcat 1S: Hereford CS Site (1.24 Acres) 8 Reach 2R: Discharge from Site 200-yr Event 9 Subcat 1S: Hereford CS Site (1.24 Acres) 10 Reach 2R: Discharge from Site 500-yr Event 11 Subcat 1S: Hereford CS Site (1.24 Acres) 12 Reach 2R: Discharge from Site 1000-yr Event 13 Subcat 1S: Hereford CS Site (1.24 Acres) 14 Reach 2R: Discharge from Site Multi -Event Tables 15 Subcat 1S: Hereford CS Site (1.24 Acres) 16 Reach 2R: Discharge from Site Hereford Ranch CS Drainage Report Page 17 Appendix G Site Plan (Post -Development) PPENDIX G - SITE PLAN (POST -DEVELOPMENT) ........................... i. •,1_• •-I . :T: •T. . 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IX 75705 PH: (903)7.Q-9900 ms DOWIOIT Is nE100111 MlOR1PF M9MIsaim • LLPs11M1WR11IC Ir5109E USW SEAT FO DE PISMIRE PAZ WRP IT IS PICISR01 RPwt&r RI PIPXRG co n EEP PPECII1 (P IOPECN 15'rcflaIE6 TITLE REFERENCE DRAWINGS TALLGRASS Leading Energy Solutions ISSUED FOR DESIGN -AFE. NO. TED APPROVED FOR CONSTRUCTION DRAWING SIZE HEREFORD RANCH COMPRESSOR STATION CIVIL - STRUCTURAL SITE PLAN WELD COUNTY COLORADO DRAWN DG CHK. DR. PMW SCALE AS SHOWN DATE 13/07/23. PROJECT MANAGER A. MARSANO FILE NO. 501-4373-200-0003r A F I m.•.. 0 CV 0 In Q, 2 0 N CD CJ CD 0 0 Ra O -P 6 4- 0 -c 0 0 i 0 O CD CO [1 I— CD en Lfl cn ca cu N CD CL CL 0 f] d Q] th n. O V N 0 N N Platted by: DAVID.CDMEZ FUGITIVE DUST CONTROL PLAN Trailblazer Pipeline Company LLC and Rockies Express Pipeline, LLC Trailblazer Conversion Project Colorado and Nebraska TALLGRASS4 wading Energy Solutions Trailblazer Pipeline Company Trailblazer Conversion Project Fugitive Dust Control Plan LLC October 2022 1 October 2022 Introduction Trailblazer Pipeline Company, LLC (TPC) is seeking authorization from the Federal Energy Regulatory Commission (FERC) pursuant to Section 7(b) of the Natural Gas Act (NGA) to abandon certain natural gas pipeline facilities and associated compressor stations (together the TPC Pipeline Facilities). Rockies Express Pipeline, LLC (REX) is seeking authorization from FERC pursuant to Sections 7(b) and 7(c) of the NGA to (1) abandon capacity on the Rockies Express Pipeline (REX Pipeline) to TPC by lease and (2) construct, install, own, operate, and maintain certain facilities necessary to support the lease service. Together, TPC and REX are the "Applicants," and their collective efforts constitute the Trailblazer Conversion Project (Project). The Project includes two new pipeline laterals and appurtenances, meter and regulating stations, and new compressor stations. Specifically, the Project involves: 1 Abandonment by TPC of 392 -miles of the Trailblazer Pipeline; cut and cap 11 interconnects on the abandoned portion of the Trailblazer pipeline; and cut and cap each end of the abandoned pipeline to isolate the portions of pipe remaining in natural gas service from the portion being abandoned. 2. Abandonment by TPC of three mainline compressor stations. 3. Construction by REX of two new lateral pipeline segments of various diameter in Nebraska totaling approximately 41.0 miles. The REX Lateral to TPC Adams (18.8 miles of 20 -inch -diameter pipeline) and the REX Lateral to TPC East (22.2 miles of 36 - inch -diameter pipeline). 4. Construction by REX of five new interconnect booster compressor stations at existing Trailblazer Pipeline facilities. 5. Install station piping and additional regulation at three existing Trailblazer Pipeline meter stations to enable deliveries into end users or interstate pipeline systems. 6. Expansion of one existing meter station between REX Pipeline and Trailblazer Pipeline. 7. Construction of two new REX meter stations. In addition to the facilities to be abandoned by TPC and constructed by REX under 7(b) and 7(c), respectively, within this Application, Tallgrass Interstate Gas Transmission, LLC (TIGT) and TPC will construct additional facilities under their respective Blanket Authorizations. These facilities are related to the work being proposed in this Application and are considered indirect impacts of the proposed Project. Construction of the Project will involve land disturbing activities, which can increase the susceptibility of soils to erosion caused by wind and water. Wind erosion can damage the productivity of the land by reducing soil moisture, altering soil structure, and carrying away soil nutrients and topsoil. A small amount of soil loss from wind erosion occurs naturally; however, human activity, such as pipeline construction, can dramatically increase soil loss due to wind Trailblazer Conversion Project Fugitive Dust Control Plan 2 October 2022 erosion (fugitive dust) and potentially create conditions that could be detrimental to air quality and safety. Fugitive dust is a type of non -point source air pollution that can cause respiratory distress for construction workers as well as nearby residents and wildlife. Additionally, fugitive dust can create a safety hazard by obscuring visibility for equipment operators, construction personnel, and traffic on public roads near the Project. The Applicants have developed this Fugitive Dust Control Plan as a guide for construction and field personnel on implementation of appropriate measures to minimize and control the generation of fugitive dust during construction activities associated with the Project. It will be the responsibility of the Project contractors, working with the Applicants' field representatives, to identify activities that are generating dust and to at all times control airborne dust levels during construction activities to acceptable levels that are in compliance with applicable standards as listed in the Regulatory Applicability section below. Fugitive Dust Sources The Applicants have attempted to identify the primary potential sources of fugitive dust, which include: • Vegetation clearing activities; • Initial grading of topsoil and subsoil, including cut -and -fill areas on steep slide slopes; • Excavation, temporary side casting of spoil, and backfilling; • Grading associated with reestablishing contours and restoring segregated topsoil; • Vehicle traffic down unimproved public and private access roads; • Vehicle and equipment travel down the Project right-of-way; • Open -bodied trucks hauling sand, soil, gravel, or other materials; and • Activities at Project facilities such as material storage yards, contractor yards, parking areas, and aboveground facility locations. Trailblazer Conversion Project Fugitive Dust Control Plan 3 October 2022 The Applicants' Contractors and field representatives will identify activities that are generating fugitive dust, implement feasible dust abatement techniques or Best Management Practices (BMPs) to control dust, and maintain compliance with applicable fugitive dust regulations. Fugitive Dust Control Measures Dust suppression measures will be employed as necessary to control fugitive dust emissions where construction activities approach dwellings, farm buildings, commercial areas, and other areas occupied by people; where the pipeline parallels an existing road or highway; and where dust could compromise safety or become a public nuisance. This shall also apply to access roads where dust raised by construction vehicles may irritate or inconvenience residents. To minimize wind erosion and fugitive dust emissions during construction, the Applicants will implement the following reasonably available control measures: • Disturb no more earth than required for construction to occur. • Use dust abatement techniques (i.e., applying water) on unpaved or un-vegetated areas or other areas susceptible to wind erosion, including the Project right-of-way, approved work areas, and unpaved roads, at least daily in areas of active construction. Application of dust suppressants will be repeated as necessary and as determined by the Environmental Inspector or REX and TPC representative. • Water for dust control will be obtained from the same municipal source that the hydrostatic test water is obtained from. No unapproved water sources may be used for Project activities including dust control. • Temporarily stockpiled soils (topsoil and spoil) will be sprayed with water or approved chemical dust suppressant to create a semi -hard protective layer to minimize wind erosion, if necessary, and as determined by the Environmental Inspector or REX and TPC representative. (Note: Utilization of chloride containing additives is limited to roads and is not permitted on stockpiled soils.) • Appropriate precautions will be taken to prevent fugitive dust emissions caused by sand blasting from reaching any residence or public building. Curtains of suitable material shall be placed, as necessary, to prevent wind-blown particles from sand blasting operations from reaching any residence or public building. • Emissions from construction equipment combustion, open burning, and temporary fuel transfer systems and associated tanks will be controlled to the extent required by state and local agencies through the permitting process. • Project -related traffic speeds will be controlled on the construction ROW and within other Project facilities; where construction activities approach dwellings, farm buildings, commercial areas, and other areas occupied by people; where the pipeline parallels an existing road or highway; and on unpaved access roads. • When hauling material and operating non-earthmoving equipment, preventing spillage and limiting speeds to 15 miles per hour (mph). • Limit speed of earth -moving equipment to 10 mph. Trailblazer Conversion Project Fugitive Dust Control Plan 4 October 2022 • Speed limits will be decreased when excessive winds prevail and where sensitive areas such as public roads are adjacent to access roads or the construction right -of- way (ROW). • Open -bodied trucks carrying sand, soil, gravel, or other materials will be covered where necessary to prevent such materials from being expelled. • Construction entrance/exit access locations onto paved roads will be cleaned at a minimum of once every 48 hours, or as needed, if materials are observed to be accumulating on the road surface. • In construction areas adjacent to highways where dust could cause poor visibility, REX and TPC will implement additional BMPs to minimize dust and potential safety issues. These additional BMPs may include applying water as close to earth -moving equipment as possible, slowing the speed of construction equipment, spacing equipment further apart, increased traffic control, or shutting down operations during high wind periods. REX and TPC will coordinate with the appropriate highway authorities to ensure adequate traffic control measures are in place, including the possibility of using flaggers to control traffic if extreme low visibility conditions develop. • When opacity along dirt roads and the right-of-way exceeds 20 percent (objects partially obscured), construction activity shall cease until dust control measures are employed. • Other dust control measures, such as the use of wind fences or berms, may also be implemented as needed. • The Environmental Inspector or REX and TPC representatives have the authority to stop work if the contractor does not comply with dust control measures. The frequency of water application will largely depend on weather conditions. Additionally, the Applicants will attempt to begin cleanup and rough grading within 72 hours after backfilling and complete cleanup within 14 days after backfilling, weather and soil conditions permitting. If seasonal or other weather conditions prevent compliance with the time frames, the contractor shall stabilize the right-of-way and maintain erosion and sediment control measures until cleanup can be conducted. Disturbed areas will be permanently revegetated in accordance with applicable permit conditions and landowner requirements. Regulatory Applicability The following air quality agencies are responsible for air quality management in areas of Project construction activities: • Nebraska Department of Environment and Energy — Air Quality Division; • Colorado Department of Public Health and Environment — Air Pollution Control Division This Fugitive Dust Control Plan has been developed to meet the regulatory requirements of the Nebraska Air Quality Regulations in Title 129 of the Nebraska Revised Statutes, Chapter 15, Section 003, and the Colorado Air Pollution Emission Notice (General Construction Permit GP03). Trailblazer Conversion Project Fugitive Dust Control Plan 5 October 2022 110 TM COLORADO Air Pollution Control Division Department of Public Health b. Environment Dedicated to protecting and improving the health and environment of the people of Colorado Permit number: Date issued: Issued to: CONSTRUCTION PERMIT 22WE0328 Issuance: 1 June 9, 2023 464274 Rockies Express Pipeline, LLC. Facility Name: Plant AIRS ID: Physical Location: County: Description: Hereford Ranch Compressor Station 123-A190 NESW Section 25 T12N R63W Weld County Natural Gas Compressor Station in the Transmission and Storage Segment Equipment or activity subject to this permit: Equipment Facility ID AIRS Point Equipment Descry Description p Emissions Description Control Unit 1 001 internal One Number: turbocharged, horsepower compression. (1) Caterpillar combustion TBD, of Natural 4 1380 -Stroke Model: HP. engine, Gas lean g Engine -fired, G3516J -burn with purpose: Serial reciprocating a site rated Exhaust emissions an Crankcase are oxidation not stack controlled. are emissions catalyst. sent y to Unit 2 002 internal One Number: turbocharged, horsepower compression. (1) Caterpillar combustion TBD, of Natural 4 690 -Stroke Model: HP. engine, Gas lean g Engine -fired, G3508J burn with purpose: Serial reciprocating a site rated Exhaust emissions an Crankcase are oxidation not controlled. stack are emissions catalyst. sent y to NA 004 including Routine equipment Activity compressors, compressor Activity compressors, compressor or 01: 02: (see predictable covered Gas station. Gas station. filter filter Attachment venting venting separator, separator, for gas each from from venting B activity): for blowdowns purging and and list full full emissions of of of None Page 1 of 29 COLORADO Air Pollution Control Division Department of Public Health b. Environment Dedicated to protecting and improving the health and environment of the people of Colorado Activity chromatograph 03: Gas venting analyzer. from gas Compressor Unit 1 005 Natural compressor JGJ/4, gas four venting rod (4) packing cylinders) from (make: reciprocating Ariel, model: None Compressor Unit 2 006 Natural compressor KBT/4-1, gas four venting rod (4) packing cylinders) from (make: reciprocating Ariel, model: None Point 001: This engine may be replaced with another engine in accordance with the temporary engine replacement provision or with another Caterpillar, G3516J engine in accordance with the permanent replacement provision of the Alternate Operating Scenario (AOS), included in this permit as Attachment A. Point 002: This engine may be replaced with another engine in accordance with the temporary engine replacement provision or with another Caterpillar, G3508J engine in accordance with the permanent replacement provision of the Alternate Operating Scenario (AOS), included in this permit as Attachment A. This permit is granted subject to all rules and regulations of the Colorado Air Quality Control Commission and the Colorado Air Pollution Prevention and Control Act (C.R.S. 25-7-101 et seq), to this specific general terms and conditions included in this document and the following specific terms and conditions. REQUIREMENTS TO SELF -CERTIFY FOR FINAL AUTHORIZATION 1. YOU MUST notify the Air Pollution Control Division (Division) no later than fifteen days after commencement of operation under this permit by submitting a Notice of Startup (NOS) form to the Division. The Notice of Startup (NOS) form may be downloaded online at https://www.colorado.gov/pacific/cdphe/air/manage-permit. Failure to notify the Division of startup of the permitted source is a violation of AQCC Regulation Number 3, Part B, III.G.1 and can result in the revocation of the permit. 2. Within one hundred and eighty days (180) of the latter of commencement of operation or issuance of this permit, compliance with the conditions contained in this permit must be demonstrated to the Division. It is the owner or operator's responsibility to self -certify compliance with the conditions. Failure to demonstrate compliance within 180 days may result in revocation of the permit. A self certification form and guidance on how to self -certify compliance as required by this permit may be obtained online at www.colorado.gov/cdphe/air- permit-self-certification. (Regulation Number 3, Part B, Section III.G.2.) 3. This permit must expire if the owner or operator of the source for which this permit was issued: (i) does not commence construction/modification or operation of this source within 18 months after either, the date of issuance of this construction permit or the date on which such Page 2 of 29 110 TM COLORADO Air Pollution Control Division Department of Public Health b. Environment Dedicated to protecting and improving the health and environment of the people of Colorado construction or activity was scheduled to commence as set forth in the permit application associated with this permit; (ii) discontinues construction for a period of eighteen months or more; (iii) does not complete construction within a reasonable time of the estimated completion date. The Division may grant extensions of the deadline. (Regulation Number 3, Part B, Section III.F.4.) F.4. ) 4. Points 001 and 002: The following information shall be provided to the Division within fifteen (15) days of the latter of commencement of operation or issuance of this permit. • manufacture date • construction date • order date • date of relocation into Colorado • manufacturer • model number • serial number • exhaust stack diameter. This information shall be included with the Notice of Startup submitted for the equipment. (Regulation Number 3, Part B, III.E.) 5. Point 004: Within one hundred and eighty days (180) of the latter of commencement of operation or issuance of this permit, the operator must complete an analysis of all equipment associated with this activity in order to update the list of equipment covered by this point, as included in Attachment B. For each activity, the owner or operator must indicate the following for each piece of equipment: • Equipment description • Equipment ID • Actual unique physical volume between isolation valves (i.e. internal physical volume) The owner or operator must submit results of this analysis to the Division as part of the self - certification process and must use results to demonstrate compliance with the emission limits in this permit. 6. The operator must complete all initial compliance testing and sampling as required in this permit and submit the results to the Division as part of the self -certification process. (Regulation Number 3, Part B, Section III.E.) 7. The operator must retain the permit final authorization letter issued by the Division, after completion of self -certification, with the most current construction permit. This construction permit alone does not provide final authority for the operation of this source. EMISSION LIMITATIONS AND RECORDS 8. Emissions of air pollutants must not exceed the following limitations. Annual records of the actual emission rates must be maintained by the owner or operator and made available to the Division for inspection upon request. (Regulation Number 3, Part B, Section I I.A.4. ) Annual Limits: Page 3 of 29 COLORADO Air Pollution Control Division Department of Public Health b. Environment Dedicated to protecting and improving the health and environment of the people of Colorado E q Facility ui p ID ment AIRS Point Process/ Activity Tons per Year Emission PM2.5 NOX VOC CO Type Unit 1 001 01 --- 6.7 9.3 10.0 Point 02 --- 0.8 1.4 3.2 Point Unit 2 002 01 --- 3.3 4.7 5.0 Point 02 --- 0.4 0.8 2.1 Point NA 004 01 --- --- 3.7 --- Point 02 --- --- 2.2 --- Point 03 --- --- 0.02 --- Point Compressor Unit 1 005 --- --- --- 9.6 --- Point Compressor Unit 2 006 --- --- --- 9.6 --- Point Note: See "Notes to Permit Holder" for information on emission factors and methods used to calculate limits. For point 001, the following designations apply: • Process 01: Stack exhaust controlled emissions. • Process 02: Crankcase uncontrolled emissions. For point 002, the following designations apply: • Process 01: Stack exhaust controlled emissions. • Process 02: Crankcase uncontrolled emissions. For point 004, the following designations apply: • Activity 01: Gas venting from blowdowns of compressors, filter separator, and full compressor station. • Activity 02: Gas venting from purging of compressors, filter separator, and full compressor station. • Activity 03: Gas venting from gas chromatograph. 9. The owner or operator must use the emission calculation methods and emission factors found in "Notes to Permit Holder" to calculate emissions and show compliance with the limits in this permit. The owner or operator must submit an Air Pollutant Emission Notice (APEN) and receive a modified permit prior to the use of any other method of calculating emissions. 10. The emission points in the table below must be operated and maintained with the emissions control equipment as listed in order to reduce emissions to less than or equal to the limits established in this permit. (Regulation Number 3, Part B, Section III.E.) I. E. ) Equipment Facility ID AIRS Point Control Device Pollutants Controlled Unit 1 001 Stack exhaust emissions: Oxidation catalyst. y VOC, Formaldehyde. CO, and Unit 2 002 Stack exhaust emissions: Oxidation catalyst. y V0C, Formaldehyde. CO, and PROCESS LIMITATIONS AND RECORDS 11. This source must be limited to the following maximum processing rates as listed below. Annual records of the actual processing rates must be maintained by the owner or operator and made Page 4 of 29 COLORADO Air Pollution Control Division Department of Public Health b. Environment Dedicated to protecting and improving the health and environment of the people of Colorado available to the Division for inspection upon request. (Regulation Number 3, Part B, Section II.A.4.) Process Limits Equipment Facility ID AIRS Point Process/ Activity Process Parameter Annual Limit Unit 1 001 --- Consumption p of naturalgas as a fuel 87.59 MMscf Unit 2 002 --- Consumption p of naturalgas as a fuel 43.92 MMscf NA 004 01 Natural compressors, gas compressor vented filter from separator, station. blowdowns and full of 1.65 MMscf 02 Natural compressors, gas compressor vented filter from separator, station. purging and of full 0.99 MMscf 03 Natural chromatograph gas venting analyzer. from gas 0.01 MMscf Compressor Unit 1 005 --- Naturalvented. gas 4. MMscf 0 Compressor Unit 2 006 Naturalvented. gas MMscf ' For point 004, the following designations apply: • Activity 01: Gas venting from blowdowns of compressors, filter separator, and full compressor station. • Activity 02: Gas venting from purging of compressors, filter separator, and full compressor station. • Activity 03: Gas venting from gas chromatograph. 12. Points 001 and 002: Fuel consumption must be measured and recorded using a continuous fuel flow meter at the inlet to the engine. The flow meter must be calibrated and maintained per the manufacturer's specifications and schedule. The owner or operator must use annual throughput records to monitor compliance with the process limits contained in this permit and to calculate emissions as described in this permit. 13. Point 004, Activities 01 and 02: The owner or operator must calculate and record the volume of natural gas vented during each ROPE event associated with this activity using the equation(s) and monitored parameters listed in this condition. The owner or operator must monitor and record the following parameters (monitored data) during each ROPE event associated with these activities. By the end of each year, the total volume calculated for each ROPE event must be summed together to determine the total annual emitted volume. The owner or operator must use annual records to demonstrate compliance with the process limits and to calculate emissions as described in this permit. Records must be made available for Division review upon request. Activity Equations Monitored Data Page 5 of 29 COLORADO Air Pollution Control Division Department of Public Health b. Environment Dedicated to protecting and improving the health and environment of the people of Colorado Activity 01 Es,n N p=1 (459.67 + Ts) (Pa,b,p — Pa,e,p) )I 459.67 + Ta . PsZa X 106 scf f Where: Es,n = Annual volume of natural gas emissions at standard conditions that is blown down, in million cubic feet. p = Individual occurrence of blowdown. N = Number of occurrences of blowdowns in the calendar year. Vp = Unique physical volume between isolation valves, in cubic feet, for each blowdown "p." Ts = Temperature at standard conditions (60 °F). Ta,p = Temperature at actual conditions in the unique physical volume (°F) for each blowdown "p". Ps = Absolute pressure at standard conditions (14.7 psia). Pa b,p = Absolute pressure at actual conditions in the unique physical volume (psia) at the beginning of the blowdown "p". Pa e,p = Absolute pressure at actual conditions in the unique physical volume (psia) at the end of the blowdown "p"; 0 if blowdown volume is purged using non-GHG gases. Za = Compressibility factor at actual conditions for natural gas. You may use either a default compressibility factor of 1, or a site -specific compressibility factor based on actual temperature and pressure conditions. Vp = Unique physical volume between isolation valves, in cubic feet, for each blowdown "p." Ta,p = Temperature at actual conditions in the unique physical volume (°F) for each blowdown "p". Pa,e,p = Absolute pressure at actual conditions in the unique physical volume (psia) at the end of the blowdown "p"; 0 if blowdown volume is purged using non-GHG gases. Za = Compressibility factor at actual conditions for natural gas. You may use either a default compressibility factor of 1, or a site -specific compressibility factor based on actual temperature and pressure conditions. Page 6 of 29 110 TM COLORADO Air Pollution Control Division Department of Public Health b. Environment Dedicated to protecting and improving the health and environment of the people of Colorado Activity 02 Es,n 1 X Pa +Patm X tpN j399,096XDpX I(T+45967)+SG 'p app I I p=1 106 (SCf/f) X 1440 (min/day) Where: Es,n = Annual volume of natural gas emissions at standard conditions that is purged, in million cubic feet. p = Individual occurrence of purges. N = Number of occurrences of purges. Dp = Unique diameter, in inches, for each purge "p. Ta,p = Temperature at actual conditions in the unique physical volume (°F) for each purge "p". Pa,p = Average pressure at actual conditions in the unique physical volume (psia) for each purge "p". Patm = Atmospheric pressure. tp = duration of each purge, in minutes. SG = Specific gravity of purged gas. I J Dp = Unique diameter, in inches, for each purge "p." Ta,p = Temperature at actual conditions in the unique physical volume (°F) for each purge "p". Pa,p = Average pressure at actual conditions in the unique physical volume (psia) for each purge "p". tp = duration of each purge in minutes. SG = specific gravity of purged gas. 14. Point 004, Activity 03: The owner or operator must continuously monitor and record the hours of operation of this equipment on an annual basis. The owner or operator must use annual throughput records to monitor compliance with the process limits contained in this permit and to calculate emissions as described in this permit. Records must be made available for Division review upon request. The actual annual process rate must be calculated using the following equation. MMSCF HO x Fc FC year � SCF y u6 WMSCFJ Where, Fatm = Natural gas vented to atmosphere in MMscf /year, HO = Hours of operation in hours/year, Fc = Maximum chromatograph natural gas venting rate in scf/hr = 1.1 scf/hr. 15. Points 005 and 006: The owner or operator must continuously monitor and record the hours of operation of this equipment on an annual basis. Rod packing must be considered operational if compressor is idle however pressurized. The owner or operator must use annual throughput records to monitor compliance with the process limits contained in this permit and to calculate emissions as described in this permit. Records must be made available for Division review upon request. The actual annual process rate must be calculated using the following equation. HOXFr Fatm 106(scf /MMscf ) Where, Fatm = Natural gas vented to atmosphere in MMscf /year, HO = Hours of operation in hours/year, Page 7 of 29 COLORADO Air Pollution Control Division Department of Public Health b. Environment Dedicated to protecting and improving the health and environment of the people of Colorado Fr = Most recent tested volumetric flow rate flow rate in scf/hr required by either Conditions 35 or 37. STATE AND FEDERAL REGULATORY REQUIREMENTS 16. The permit number and ten digit AIRS ID number assigned by the Division (e.g. 123/4567/001) must be marked on the subject equipment for ease of identification. (Regulation Number 3, Part B, Section III.E.) E.) (State only enforceable) 17. Visible emissions must not exceed twenty percent (20%) opacity during normal operation of the source. During periods of startup, process modification, or adjustment of control equipment, visible emissions shall not exceed 30% opacity for more than six minutes in any sixty consecutive minutes. (Regulation Number 1, Section II.A.1. &t 4.) 18. This source is subject to the odor requirements of Regulation Number 2. (State only enforceable) 19. The owner or operator is subject to all applicable requirements, including reporting and recordkeeping requirements, from Regulation Number 7, Part D, Section IV. 20. These sources are located in the ozone non -attainment or attainment -maintenance area and are subject to the Reasonably Available Control Technology (RACT) requirements of Regulation Number 3, Part B, Section III.D.2.a. The following requirements were determined to be RACT for these sources: Equipment Facility ID AIRS Point RACT Pollutants Unit 1 001 Natural gas combustion catalyst. and oxidation VOC and NOx Unit 2 002 Natural gas combustion catalyst. and oxidation VOC and NOx NA 004 Compliance included with Best in Management this permit. Practices VOC Unit Compressor 1 005 Applicable 60.5360a through requirements OOOOa). 60.5439a from (NSPS 40 Subpart CFR VOC Compressor Unit 2 006 21. Points 001 and 002, Process 01: This lean burn engine is subject to the requirements for natural gas -fired reciprocating internal combustion engines under Regulation Number 7, Part E, Section I. D.4 (State only enforceable). Any lean burn reciprocating internal combustion engine with a manufacturer's name plate design rate greater than 500 horsepower, constructed or modified before February 1, 2009 shall install and operate an oxidation catalyst by July 1, 2010. Page 8 of 29 110 TM COLORADO Air Pollution Control Division Department of Public Health b. Environment Dedicated to protecting and improving the health and environment of the people of Colorado Please note that replacements of this engine in accordance with the AOS in Attachment A may be subject to this or other requirements in Regulation Number 7, Part E, Section I.D. 22. Points 001 and 002, Process 01: This engine is subject to the control requirements for natural gas -fired reciprocating internal combustion engines under Regulation Number 7, Part E, Section I. D.3 (State only enforceable). The owner or operator of any natural gas -fired reciprocating internal combustion engine that is either constructed or relocated to the state of Colorado from another state, on or after the date listed in Table 1 below shall operate and maintain each engine according to the manufacturer's written instructions or procedures to the extent practicable and consistent with technological limitations and good engineering and maintenance practices over the entire life of the engine so that it achieves the emission standards required in Table 1, shown below. Actual emissions from natural gas fired reciprocating internal combustion engines shall not exceed the emission performance standards in the table below as expressed in units of grams per horsepower -hour (G/hp-hr). 1 Table Maximum HP Engine Construction Relocation or Date Emission Standard in g/hp-hr NOx CO VOC <100HP P Any N/A N/A N/A >100HP and <500HP January January 1, 1, 2008 2011 2.0 1.0 4.0 2.0 1.0 0.7 ≥500HP P July July 1, 1, 2007 2010 2.0 1.0 4.0 2.0 1.0 0.7 I Maximum engine horsepower is the nameplate rating of the engine and does not account for deration. 23. Point 001, Process 01: This engine is subject to the control requirements for stationary natural gas fired reciprocating internal combustion engines with a manufacturer's design rate greater than or equal to 1,000 horsepower under Regulation Number 7, Part E, Section I.D.5. The owner or operator must comply with the performance testing (Section I.D.5.d.), ), monitoring (Section I.D.5.e.), 5. e. ), recordkeeping (Section I.D.5.f.) D. 5. f .) and reporting (Section I.D.5.g.) D. 5. g.) requirements of Section I.D.5. (State only enforceable) The owner or operator of any stationary natural gas fired reciprocating internal combustion engine that is placed in service, modified, or relocated after November 14, 2020, must comply with the emission standards in Table 2, shown below, upon placement in service, modification, or relocation. (Regulation Number 7, Part E, Section I.D.5.b.(i)) D. 5. b. (i) ) 2 Table Engine Type Emission Standards (g/hp-hr) NOx CO VOC 4 stringent -Stroke November Lean emission 14, Burn 2020, standard engines above) (unless in under service subject Section on to or a I.D.3.b, more before 1.2 2.0 0.7 Page 9 of 29 COLORADO Air Pollution Control Division Department of Public Health b. Environment Dedicated to protecting and improving the health and environment of the people of Colorado Rich Burn engines in service 14, on or 2020, before November 0.8 2.0 0.7 4 modified, -Stroke or Lean relocated Burn engines after November placed in service, 14, 2020, 0.7 2.0 0.7 Rich Burn relocated engines after placed November in service, 14, modified, 2020, or 0.5 2.0 0.7 2 -Stroke Lean Burn engines 3.0 2.0 0.7 24. Point 004: The owner or operator must use best management practices to minimize hydrocarbon emissions during, or to reduce the frequency of, routine or predictable gas venting emissions events. The owner and operator must develop and maintain a description of best management practices implemented to minimize hydrocarbon emissions during, or to reduce the frequency of, routine or predictable gas venting events covered by this permit. The description must also include how those best management practices are implemented and performed. The description must be made available for Division review upon request. (Regulation Number 3, Part B, Section III.D.2.) 25. Point 004: The owner or operator must perform routine or predictable gas venting emissions activities between October 1 and April 30, when practicable. (Regulation Number 3, Part B, Section III.D.2.) 26. Point 004: For equipment blowdowns, the owner or operator must avoid blowing down the equipment completely to ambient pressure, where practicable. (Regulation Number 3, Part B, Section III.D.2.) 27. Points 005 and 006: The volumetric flow rate must not exceed 2 standard cubic feet per minute (scfm) per cylinder. The owner of operator must conduct measurements of the volumetric flow rate in accordance with the schedule specified in this permit. (Regulation Number 3, Part B, Section III.E.) OPERATING Et MAINTENANCE REQUIREMENTS 28. This source is not required to follow a Division -approved operating and maintenance plan. COMPLIANCE TESTING AND SAMPLING Initial Testing Requirements 29. Points 001 and 002, Process 01: A source initial compliance test shall be conducted on this emissions point to measure the emission rate(s) for the pollutants listed below in order to demonstrate compliance with the emission limits in this permit. The test protocol must be in accordance with the requirements of the Air Pollution Control Division Compliance Test Manual and shall be submitted to the Division for review and approval at least thirty (30) days prior to testing. No compliance test shall be conducted without prior approval from the Division. Any compliance test conducted to show compliance with a monthly or annual emission limitation shall have the results projected up to the monthly or annual averaging time by multiplying the test results by the allowable number of operating hours for that averaging time (Regulation Number 3, Part B., Section III.G.3) Oxides of Nitrogen using EPA approved methods. Carbon Monoxide using EPA approved methods. Volatile Organic Compounds using EPA approved methods. Page 10 of 29 COLORADO Air Pollution Control Division Department of Public Health b. Environment Dedicated to protecting and improving the health and environment of the people of Colorado Formaldehyde EPA approved methods. 30. Points 001 and 002, Process 02: A source initial compliance test shall be conducted on this emissions point to measure the emission rate(s) for the pollutants listed below in order to demonstrate compliance with the emission limits in this permit. The test protocol must be in accordance with the requirements of the Air Pollution Control Division Compliance Test Manual and shall be submitted to the Division for review and approval at least thirty (30) days prior to testing. No compliance test shall be conducted without prior approval from the Division. Any compliance test conducted to show compliance with a monthly or annual emission limitation shall have the results projected up to the monthly or annual averaging time by multiplying the test results by the allowable number of operating hours for that averaging time (Regulation Number 3, Part B., Section III.G.3) Oxides of Nitrogen using EPA approved methods. Carbon Monoxide using EPA approved methods. Volatile Organic Compounds using EPA approved methods. Formaldehyde EPA approved methods. 31. Points 001 and 002: The owner or operator must complete the initial sampling for higher (gross) heat content of the fuel used in the engine, using appropriate ASTM Methods or equivalent, as required by this permit and submit the results to the Division as part of the self - certification process to ensure compliance with emissions limits. Results of the heat content verification must be retained for a period of five years and made available to the Division upon request. (Regulation Number 3, Part B, Section III.E.) E. ) The heat content indicated by the most recent analysis must be used to monitor compliance with the emission limits for each engine, as specified in the Notes to Permit Holder. 32. Point 001, Process 01: This engine is subject to the performance testing requirement specified under Regulation 7, Part E, Section I.D.5.d. 33. Point 004: The owner or operator must complete an initial site specific extended gas analysis ("Analysis") within one hundred and eighty days (180) after commencement of operation or issuance of this permit, whichever comes later, of the natural gas vented during blowdowns, purging, and chromatograph measurement events in order to verify the VOC and n -hexane (weight fraction) of this emission stream. The gas sample must be obtained directly from the compressor blowdown, purge, or chromatograph line. Results of the Analysis must be used to calculate site -specific emission factors for the pollutants referenced in this permit (in units of lb/MMSCF gas vented) using Division approved methods. Results of the Analysis must be submitted to the Division as part of the self -certification and must demonstrate the emissions factors established through the Analysis are less than or equal to, the emissions factors submitted with the permit application and established herein in the "Notes to Permit Holder" for this emissions point. If any site -specific emissions factor developed through this Analysis is greater than the emissions factors submitted with the permit application and established in the "Notes to Permit Holder" the operator must submit to the Division within 60 days, or in a timeframe as agreed to by the Division, a request for permit modification to address these inaccuracies. 34. Point 005 and 006: The owner or operator must complete an initial site specific extended gas analysis ("Analysis") within one hundred and eighty days (180) after commencement of operation or issuance of this permit, whichever comes later, of the natural gas vented from the rod Page 11 of 29 COLORADO Air Pollution Control Division Department of Public Health b. Environment Dedicated to protecting and improving the health and environment of the people of Colorado packing in order to verify the VOC and n -hexane (weight fraction) of this emission stream. The gas sample must be obtained directly from the rod packing exhaust tine or from a gas tine whose gas has equivalent composition to rod packing emissions. Results of the Analysis must be used to calculate site -specific emission factors for the pollutants referenced in this permit (in units of lb/MMSCF gas vented) using Division approved methods. Results of the Analysis must be submitted to the Division as part of the self -certification and must demonstrate the emissions factors established through the Analysis are less than or equal to, the emissions factors submitted with the permit application and established herein in the "Notes to Permit Holder" for this emissions point. If any site -specific emissions factor developed through this Analysis is greater than the emissions factors submitted with the permit application and established in the "Notes to Permit Holder" the operator must submit to the Division within 60 days, or in a timeframe as agreed to by the Division, a request for permit modification to address these inaccuracies. 35. Point 005 and 006: The owner or operator must complete an initial compliance test to determine the volumetric flow rate from each reciprocating compressor's rod packing. The owner or operator must use USEPA Test Method 2D, as promulgated in Appendix A-1 to 40 CFR Part 60, in order to determine the volumetric flow rate from the rod packing. Results of the Analysis must be submitted to the Division as part of the self -certification and it must demonstrate compliance with the volumetric flow rate limits from each reciprocating compressor's rod packing stablished in this permit. Results of the volumetric flow rate must be retained for a period of five years and made available to the Division upon request. (Regulation Number 3, Part B, Section III.E.) Periodic Testing Requirements 36. Points 001 and 002: Replacements of this unit completed as Alternative Operating Scenarios may be subject to additional testing requirements as specified in Attachment A. 37. Points 005 and 006: On an annual basis, the owner or operator must complete a periodic compliance test to determine the volumetric flow rate from each reciprocating compressor's rod packing. The owner or operator must use USEPA Test Method 2D, as promulgated in Appendix A-1 to 40 CFR Part 60, in order to determine the volumetric flow rate from the rod packing. Results of the Analysis must be submitted to the Division as part of the self - certification and it must demonstrate compliance with the volumetric flow rate limits from each reciprocating compressor's rod packing stablished in this permit. Volumetric flow testing must be conducted no later than one (1) year after the last test but not before 180 days since the last test. Results of the volumetric flow rate must be retained for a period of five years and made available to the Division upon request. (Regulation Number 3, Part B, Section III.E.) ADDITIONAL REQUIREMENTS 38. A revised Air Pollutant Emission Notice (APEN) must be filed: (Regulation Number 3, Part A, II.C.) • Annually by April 30th whenever a significant increase in emissions occurs as follows: For any criteria pollutant: For sources emitting less than 100 tons per year, a change in actual emissions of five (5) tons per year or more, above the level reported on the last APEN; or Page 12 of 29 COLORADO Air Pollution Control Division Department of Public Health b. Environment Dedicated to protecting and improving the health and environment of the people of Colorado For volatile organic compounds (VOC) and nitrogen oxides sources (Nor) in ozone nonattainment areas emitting less than 100 tons of VOC or NOx per year, a change in annual actual emissions of one (1) ton per year or more or five percent, whichever is greater, above the level reported on the last APEN; or For sources emitting 100 tons per year or more, a change in actual emissions of five percent or 50 tons per year or more, whichever is less, above the level reported on the last APEN submitted; or For any non -criteria reportable pollutant: If the emissions increase by 50% or five (5) tons per year, whichever is less, above the level reported on the last APEN submitted to the Division. • Whenever there is a change in the owner or operator of any facility, process, or activity; or • Whenever new control equipment is installed, or whenever a different type of control equipment replaces an existing type of control equipment; or • Whenever a permit limitation must be modified; or • No later than 30 days before the existing APEN expires. • Points 001 and 002: Within 14 calendar days of commencing operation of a permanent replacement engine under the alternative operating scenario outlined in this permit as Attachment A. The APEN shall include the specific manufacturer, model and serial number and horsepower of the permanent replacement engine, the appropriate APEN filing fee and a cover letter explaining that the permittee is exercising an alternative - operating scenario and is installing a permanent replacement engine. 39. The exhaust stack(s) for the following emission point(s) must vent emissions at a point greater than or equal to the height specified in the table below: Equipment ID AIRS Point Minimum ground stack level height (m) above Maximum Stack (m) Diameter Unit 1 001 8.4 0.32 Unit 2 002 8.4 0.22 EGEN 003 3.0 0.20 40. This facility must be completely enclosed by a fence line and posted with no trespassing signs that preclude public access to this site as described in the modeling analysis for this facility. This requirement is imposed as a result of the modeled ambient air NOx impacts that result from the facility operations. (Regulation Number 3, Part B, Section III.B.5.) B.5. ) GENERAL TERMS AND CONDITIONS 41. This permit and any attachments must be retained and made available for inspection upon request. The permit may be reissued to a new owner by the APCD as provided in AQCC Regulation Number 3, Part B, Section II.B. . B. upon a request for transfer of ownership and the submittal of a revised APEN and the required fee. Page 13 of 29 COLORADO Air Pollution Control Division Department of Public Health b. Environment Dedicated to protecting and improving the health and environment of the people of Colorado 42. If this permit specifically states that final authorization has been granted, then the remainder of this condition is not applicable. Otherwise, the issuance of this construction permit does not provide "final" authority for this activity or operation of this source. Final authorization of the permit must be secured from the APCD in writing in accordance with the provisions of 25-7- 114.5(12)(a) C.R.S. and AQCC Regulation Number 3, Part B, Section III.G. Final authorization cannot be granted until the operation or activity commences and has been verified by the APCD as conforming in all respects with the conditions of the permit. Once self -certification of all points has been reviewed and approved by the Division, it will provide written documentation of such final authorization. Details for obtaining final authorization to operate are located in the Requirements to Self -Certify for Final Authorization section of this permit. 43. This permit is issued in reliance upon the accuracy and completeness of information supplied by the owner or operator and is conditioned upon conduct of the activity, or construction, installation and operation of the source, in accordance with this information and with representations made by the owner or operator or owner or operator's agents. It is valid only for the equipment and operations or activity specifically identified on the permit. 44. Unless specifically stated otherwise, the general and specific conditions contained in this permit have been determined by the APCD to be necessary to assure compliance with the provisions of Section 25-7-114.5(7)(a), C.R.S. 45. Each and every condition of this permit is a material part hereof and is not severable. Any challenge to or appeal of a condition hereof must constitute a rejection of the entire permit and upon such occurrence, this permit must be deemed denied ab initio. This permit may be revoked at any time prior to self -certification and final authorization by the Air Pollution Control Division (APCD) on grounds set forth in the Colorado Air Quality Control Act and regulations of the Air Quality Control Commission (AQCC), including failure to meet any express term or condition of the permit. If the Division denies a permit, conditions imposed upon a permit are contested by the owner or operator, or the Division revokes a permit, the owner or operator of a source may request a hearing before the AQCC for review of the Division's action. 46. Section 25-7-114.7(2)(a), C.R.S. requires that all sources required to file an Air Pollution Emission Notice (APEN) must pay an annual fee to cover the costs of inspections and administration. If a source or activity is to be discontinued, the owner must notify the Division in writing requesting a cancellation of the permit. Upon notification, annual fee billing will terminate. 47. Violation of the terms of a permit or of the provisions of the Colorado Air Pollution Prevention and Control Act or the regulations of the AQCC may result in administrative, civil or criminal enforcement actions under Sections 25-7-115 (enforcement), -121 (injunctions), -122 (civil penalties), -122.1 (criminal penalties), C.R.S. By: Diego Chimendes Permit Engineer Page 14 of 29 COLORADO Air Pollution Control Division Department of Public Health b. Environment Dedicated to protecting and improving the health and environment of the people of Colorado Permit History Issuance Date Description Issuance 1 Issuance Issued to Rockies Express Pipeline, LLC. This Page 15 of 29 110 TM COLORADO Air Pollution Control Division Department of Public Health b. Environment Dedicated to protecting and improving the health and environment of the people of Colorado Notes to Permit Holder at the time of this permit issuance: 1) The permit holder is required to pay fees for the processing time for this permit. An invoice for these fees will be issued after the permit is issued. The permit holder must pay the invoice within 30 days of receipt of the invoice. Failure to pay the invoice will result in revocation of this permit. (Regulation Number 3, Part A, Section VI.B.) B. ) 2) The production or raw material processing limits and emission limits contained in this permit are based on the consumption rates requested in the permit application. These limits may be revised upon request of the owner or operator providing there is no exceedance of any specific emission control regulation or any ambient air quality standard. A revised air pollution emission notice (APEN) and complete application form must be submitted with a request for a permit revision. 3) This source is subject to the Common Provisions Regulation Part II, Subpart E, Affirmative Defense Provision for Excess Emissions During Malfunctions. The owner or operator must notify the Division of any malfunction condition which causes a violation of any emission limit or limits stated in this permit as soon as possible, but no later than noon of the next working day, followed by written notice to the Division addressing all of the criteria set forth in Part I I. E.1 of the Common Provisions Regulation. See: https://www.colorado.gov/pacific/cdphe/aqcc-regs 4) The following emissions of non -criteria reportable air pollutants are estimated based upon the process limits as indicated in this permit. This information is listed to inform the operator of the Division's analysis of the specific compounds emitted if the sources operates at the permitted limitations. Equipment ID AIRS Point Pollutant CAS # Uncontrolled Emissions (tb/yr) Controlled Emissions (tb/yr) Unit 1 001 Formaldehyde 50000 12,687 4,078 Acetaldehyde 75070 926 926 Acrolein 107028 569 569 Benzene 71432 49 49 108883 45 45 Toluene Ethylbenzene 100414 4 4 Xylene 1330207 20 20 n -Hexane 110543 123 123 2,2,4- 540841 28 28 Trimethylpentane Methanol 67561 277 277 1,3 -Butadiene 106990 30 30 Unit 2 002 Formaldehyde 50000 6,268 2,015 Acetaldehyde 75070 464 464 Page 16 of 29 COLORADO Air Pollution Control Division Department of Public Health b. Environment Dedicated to protecting and improving the health and environment of the people of Colorado Acrolein 107028 285 285 Benzene 71432 24 24 108883 23 23 Toluene Ethylbenzene 100414 2 2 Xylene 1330207 10 10 n -Hexane 110543 62 62 2,2,4- 540841 14 14 Trimethylpentane Methanol 67561 139 139 1,3 -Butadiene 106990 15 15 NA 004 n -Hexane 110543 58 58 Compressor Unit 1 005 n -Hexane 110543 92 92 Compressor Unit 2 006 n -Hexane 110543 92 92 Note: All non -criteria reportable pollutants in the table above with uncontrolled emission rates above 250 pounds per year (lb/yr) are reportable and may result in annual emission fees based on the most recent Air Pollution Emission Notice. 5) The emission levels contained in this permit are based on the following emission factors: Point 001: Process 01: Exhaust stack emissions: CAS # Pollutant Uncontrolled Emission Factors Controlled Emission Factors lb/MMBTU g/bhp-hr lb/MMBTU g/bhp-hr NOx 1.348 x 10-1 0.500 1.348 x 10-1 0.500 CO 5.467 x 10-1 2.028 2.021 x 10-1 0.750 VOC 2.291 x 10-1 0.850 1.886 x 10-1 0.700 50000 Formaldehyde 1.146 x 10-1 4.250 x 10-1 2.749 x 10-2 1.020 x 10' 75070 Acetaldehyde 8.36 x 10-3 3.10 x 10-2 8.36 x 10-3 3.10 x 10-2 107028 Acrolein 5.14 x 10-3 1.91 x 10-2 5.14 x 10-3 1.91 x 10-2 67561 Methanol 2.50 x 10-3 9.28 x 10-2 2.50 x 10-3 9.28 x 10-3 Emission factors are based on a Brake -Specific Fuel Consumption Factor of 8180 Btu/hp-hr, a site - rated horsepower value of 1380, and a fuel gas heat content of 1129 Btu/scf. CAS # Pollutant Uncontrolled Source EF Controlled Source EF NOx Manufacturer Spec p Sheet CO VOC 50000 Formaldehyde Page 17 of 29 110 TM COLORADO Air Pollution Control Division Department of Public Health b. Environment Dedicated to protecting and improving the health and environment of the people of Colorado 75070 Acetaldehyde AP -42 Table 3.2-2: 4 -Stroke Lean -Burn Engines 107028 Acrolein 67561 Methanol Annual emissions must be calculated using the emission factors in units of lb/MMBTU listed above, actual yearly fuel consumption, and the fuel gas heat content obtained from the most recent site - specific analysis using the following equation. ton Emissions (year) _ year lb Emission factor en (MMBTUIlX FCine g �yMearF� TU x Fuel Gas Heat Content (SCF) FC = Fuel Consumption, MMSCF/year Process 02: Crankcase emissions: Unit Conversion (ZOOOIb) ton CAS # Pollutant Uncontrolled Emission Factors lb/MMBTU g/bhp-hr NOx 1.617 x 10-2 6.000 x 10-2 CO 6.560 x 10-2 2.434 x 10-1 VOC 2.749 x 10-2 1.020 x 10-1 50000 Formaldehyde 1.375 x 10-2 5.101 x 10-2 75070 Acetaldehyde 1.00 x 10-3 3.72 x 10-3 107028 Acrolein 6.17 x 10-4 2.29 x 10-3 67561 Methanol 3.00 x 10-4 1.11 x 10-3 Emission factors are based on a Brake -Specific Fuel Consumption Factor of 8180 Btu/hp-hr, a site - rated horsepower value of 1380, and a fuel gas heat content of 1129 Btu/scf. CAS # Pollutant Uncontrolled EF Source NOx Manufacturer Spec Sheet CO VOC 50000 Formaldehyde 75070 Acetaldehyde AP -42 3.2-2: 4 -Stroke Lean -Burn Engines 107028 Acrolein Table 67561 Methanol Page 18 of 29 110 TM COLORADO Air Pollution Control Division Department of Public Health b. Environment Dedicated to protecting and improving the health and environment of the people of Colorado Annual emissions must be calculated using the emission factors in units of lb/MMBTU listed above, actual yearly fuel consumption, and the fuel gas heat content obtained from the most recent site - specific analysis using the following equation. Emission factor lb X FCen •ine ton (MMBTU� g Emissions (year) _ year (MearF) � x Fuel Gas Heat Content year �CF FC = Fuel Consumption, MMSCF/year Point 002: Process 01: Exhaust stack emissions: Unit Conversion (20001b ton ) CAS # Pollutant Uncontrolled Emission Factors Controlled Emission Factors lb/MMBTU g/bhp-hr lb/MMBTU g/bhp-hr NOx 1.344 x 10-1 0.500 1.344 x 10- 1 0.500 CO 6.914 x 10-1 2.573 2.016 x 10-1 0.750 VOC 2.585 x 10-A 0.962 1.881 x 10-' 0.700 50000 Formaldehyde 1.129 x 10-2 0.420 2.709 x 10-2 0.101 75070 Acetaldehyde 8.36 x 10-3 3.11 x 10-2 8.36 x 10-3 3.11 x 10-2 107028 Acrolein 5.14 x 10-3 1.91 x 10-2 5.14 x 10-3 1.91 x 10-2 Emission factors are based on a Brake -Specific Fuel Consumption Factor of 8203 Btu/hp-hr, a site - rated horsepower value of 690, and a fuel gas heat content of 1129 Btu/scf. CAS # Pollutant Uncontrolled Source EF Controlled Source EF NOx Manufacturer Spec p Sheet CO VOC 50000 Formaldehyde 75070 Acetaldehyde AP -42 3.2-2: 4 -Stroke Lean -Burn Engines 107028 Acrolein Table 67561 Methanol Page 19 of 29 110 TM COLORADO Air Pollution Control Division Department of Public Health b. Environment Dedicated to protecting and improving the health and environment of the people of Colorado Annual emissions must be calculated using the emission factors in units of lb/MMBTU listed above, actual yearly fuel consumption, and the fuel gas heat content obtained from the most recent site - specific analysis using the following equation. Emission factor lb X FCen •ine ton (MMBTU� g Emissions (year) _ year (MearF) � x Fuel Gas Heat Content year �CF FC = Fuel Consumption, MMSCF/year Process 02: Crankcase emissions: Unit Conversion (20001b ton ) CAS # Pollutant Uncontrolled Emission Factors lb/MMBTU g/bhp-hr NOx 1.613 x 10-2 6.000 x 10-2 CO 8.297 x 10-2 3.087 x 10-1 VOC 3.102 x 10-2 1.154 x 10- 1 50000 Formaldehyde 1.355 x 10-2 5.040 x 10-2 75070 Acetaldehyde 1.00 x 10-3 3.73 x 10-3 107028 Acrolein 6.17 x 10-4 2.29 x 10-3 Emission factors are based on a Brake -Specific Fuel Consumption Factor of 8203 Btu/hp-hr, a site - rated horsepower value of 690, and a fuel gas heat content of 1129 Btu/scf. CAS # Pollutant Uncontrolled EF Source NOx Manufacturer Spec Sheet CO VOC 50000 Formaldehyde 75070 Acetaldehyde AP 3.2-2: 4 -Stroke Lean -Burn Engines -42 Table 1 7 2 008 A cole r in Page 20 of 29 COLORADO Air Pollution Control Division Department of Public Health b. Environment Dedicated to protecting and improving the health and environment of the people of Colorado Annual emissions must be calculated using the emission factors in units of lb/MMBTU listed above, actual yearly fuel consumption, and the fuel gas heat content obtained from the most recent site - specific analysis using the following equation. Emission factor lb X FCen •ine ton (MMBTU� g Emissions (year) _ year (MearF) � x Fuel Gas Heat Content year �CF FC = Fuel Consumption, MMSCF/year Point 004: Unit Conversion (20001b ton ) CAS # Pollutant Uncontrolled (tb/MMscf) Factors Emission Source VOC 4546.00 Chromatographic Analysis Gas Note: The site -specific VOC emission factor in the table above is based on a representative gas chromatograph analysis result and the methodology in EPA Emission Inventory Improvement Program Publication: Volume II, Chapter 10 - Displacement Equation (10.4-3). Actual emissions are calculated by multiplying the emission factors in the table above by total annual volume as calculated using the volumetric equations listed in the "Process Limitations and Records" section of this permit. Points 005 and 006: CAS # Pollutant Uncontrolled (lb/MMscf) Factors Emission Source VOC 4546.00 Chromatographic Analysis Gas Note: VOC emissions factor was developed using a representative sample and the methodology in in EPA Volume II: Chapter 10, Preferred and alternative methods for estimating air emissions. Actual annual VOC emissions from venting of reciprocating compressor rod packing must be calculated based on the emission factor (EF) above and the most recent volumetric flow rate tested. lb VOC( = EF x Facet scf year l (year) Fatm = Natural gas vented to atmosphere in MMscf/year. 6) In accordance with C.R.S. 25-7-114.1, each Air Pollutant Emission Notice (APEN) associated with this permit is valid for a term of five years from the date it was received by the Division. A revised APEN must be submitted no later than 30 days before the five-year term expires. Please refer to the most recent annual fee invoice to determine the APEN expiration date for each emissions point associated with this permit. For any questions regarding a specific expiration date call the Division at (303)-692-3150. 7) Point 001 and 002, Process 01: This engine is subject to 40 CFR, Part 60, Subpart JJJJ Standards of Performance for Stationary Spark Ignition Internal Combustion Engines (See January 18, 2008 Federal Register posting - effective March 18, 2008). This rule has not yet been incorporated into Page 21 of 29 110 TM COLORADO Air Pollution Control Division Department of Public Health b. Environment Dedicated to protecting and improving the health and environment of the people of Colorado Colorado Air Quality Control Commission's Regulation Number 6. A copy of the complete subpart is available on the EPA website at: https: //www.federalregister.gov/documents/2008/01 /18/E7- 25394/standards-of-performance-for-stationary-spark-ignition-internal-combustion-engines-and- national 8) Point 001 and 002, Process 01: This engine is subject to 40 CFR, Part 63, Subpart ZZZZ - National Emission Standards for Hazardous Air Pollutants for Reciprocating Internal Combustion Engines. (See January 18, 2008 Federal Register posting - effective March 18, 2008). The January 18, 2008 amendments to include requirements for area sources and engines < 500 hp located at major sources have not yet been incorporated into Colorado Air Quality Control Commission's Regulation Number 8. A copy of the complete subpart is available on the EPA website at: https: / /www.federalregister.gov/documents/2008/01 /18 / E7-25394 /standards -of -performance - for -stationary -spark -ignition -internal-combustion -engines-and-national Additional information regarding area source standards can be found on the EPA website at: https: / /www.epa.gov/stationary-engines/national-emission-standards-hazardous-air-pollutants- reci procati ng-i nternal-0 9) Points 005 and 006: This source is subject to 40 CFR, Part 60, Subpart 0000a - Standards of Performance for Crude Oil and Natural Gas Facilities for which Construction, Modification, or Reconstruction Commenced after September 18, 2015 (See June 3, 2016 Federal Register posting - effective August 2, 2016.) This rule has not yet been incorporated into Colorado Air Quality Control Commission's Regulation No. 6. A copy of the complete subpart is available at the Office of the Federal Register website at: https: / /www.federalregister.gov/documents/2016/06/03/2016- 11971 /ail -and -natural -gas -sector -emission -standards -for -new -reconstructed -and -modified -sources 10) This facility is classified as follows: Applicable Requirement Status Operating Permit Minor Source. True PSD Minor Source. True NANSR Minor Source. True 11) Full text of the Title 40, Protection of Environment Electronic Code of Federal Regulations can be found at the following website: http://www.ecfr.gov/ Part 60: Standards of Performance for New Stationary Sources NSPS 60.1 -End Subpart A - Subpart UUUU NSPS Part 60, Appendixes Appendix A - Appendix Part Categories 63: National Emission Standards for Hazardous Air Pollutants for Source MACT 63.1-63.599 Subpart A - Subpart Z Page 22 of 29 COLORADO Air Pollution Control Division Department of Public Health b. Environment Dedicated to protecting and improving the health and environment of the people of Colorado MACT 63.600-63.1199 Subpart AA - Subpart DDD MACT 63.1200-63.1439 Subpart EEE - Subpart PPP MACT 63.1440-63.6175 Subpart QQQ - Subpart YYYY MACT 63.6580-63.8830 Subpart ZZZZ - Subpart MMMMM MACT 63.8980 -End Subpart NNNNN - Subpart XXXXXX Page 23 of 29 COLORADO Air Pollution Control Division Department of Public Health b. Environment Dedicated to protecting and improving the health and environment of the people of Colorado ATTACHMENT A: ALTERNATIVE OPERATING SCENARIOS RECIPROCATING INTERNAL COMBUSTION ENGINES October 12, 2012 2. Alternative Operating Scenarios The following Alternative Operating Scenario (AOS) for the temporary and permanent replacement of natural gas fired reciprocating internal combustion engines has been reviewed in accordance with the requirements of Regulation Number 3., Part A, Section IV.A, Operational Flexibility -Alternative Operating Scenarios, Regulation Number 3, Part B, Construction Permits, and Regulation Number 3, Part D, Major Stationary Source New Source Review and Prevention of Significant Deterioration, and it has been found to meet all applicable substantive and procedural requirements. This permit incorporates and shall be considered a Construction Permit for any engine replacement performed in accordance with this AOS, and the owner or operator shall be allowed to perform such engine replacement without applying for a revision to this permit or obtaining a new Construction Permit. 2.1 Engine Replacement The following AOS is incorporated into this permit in order to deal with an engine breakdown or periodic routine maintenance and repair of an existing onsite engine that requires the use of either a temporary or permanent replacement engine. "Temporary" is defined as in the same service for 90 operating days or less in any 12 month period. "Permanent" is defined as in the same service for more than 90 operating days in any 12 month period. The 90 days is the total number of days that the engine is in operation. If the engine operates only part of a day, that day shalt count as a single day towards the 90 day total. The compliance demonstrations and any periodic monitoring required by this AOS are in addition to any compliance demonstrations or periodic monitoring required by this permit. All replacement engines are subject to all federally applicable and state -only requirements set forth in this permit (including monitoring and record keeping). The results of all tests and the associated calculations required by this AOS shall be submitted to the Division within 30 calendar days of the test or within 60 days of the test if such testing is required to demonstrate compliance with NSPS or MACT requirements. Results of all tests shall be kept on site for five (5) years and made available to the Division upon request. The owner or operator shall maintain a log on -site and contemporaneously record the start and stop date of any engine replacement, the manufacturer, date of manufacture, model number, horsepower, and serial number of the engine(s) that are replaced during the term of this permit, and the manufacturer, model number, horsepower, and serial number of the replacement engine. In addition to the log, the owner or operator shall maintain a copy of all Applicability Reports required under section 2.1.2 and make them available to the Division upon request. Page 24 of 29 COLORADO Air Pollution Control Division Department of Public Health b. Environment Dedicated to protecting and improving the health and environment of the people of Colorado 2.1.1 The owner or operator may temporarily replace an existing engine that is subject to the emission limits set forth in this permit with an engine that is of the same manufacturer, model, and horsepower or a different manufacturer, model, or horsepower as the existing engine without modifying this permit, so long as the temporary replacement engine complies with all permit limitations and other requirements applicable to the existing engine. Measurement of emissions from the temporary replacement engine shall be made as set forth in section 2.2. 2.1.2 The owner or operator may permanently replace the existing engine with another engine with the same manufacturer, model, and horsepower engines without modifying this permit so long as the permanent replacement engine complies with all permit limitations and other requirements applicable to the existing engine as well as any new applicable requirements for the replacement engine. Measurement of emissions from the permanent replacement engine and compliance with the applicable emission limitations shall be made as set forth in section 2.2. An Air Pollutant Emissions Notice (APEN) that includes the specific manufacturer, model and serial number and horsepower of the permanent replacement engine shall be filed with the Division for the permanent replacement engine within 14 calendar days of commencing operation of the replacement engine. The APEN shall be accompanied by the appropriate APEN filing fee, a cover letter explaining that the owner or operator is exercising an alternative operating scenario and is installing a permanent replacement engine, and a copy of the relevant Applicability Reports for the replacement engine. Example Applicability Reports can be found at www.colorado.gov/cdphe/air/AOS. This submittal shall be accompanied by a certification from the Responsible Official indicating that "based on the information and belief formed after reasonable inquiry, the statements and information included in the submittal are true, accurate and complete". This AOS cannot be used for permanent engine replacement of a grandfathered or permit exempt engine or an engine that is not subject to emission limits. The owner or operator shall agree to pay fees based on the normal permit processing rate for review of information submitted to the Division in regard to any permanent engine replacement. 2.2 Portable Analyzer Testing Note: In some cases there may be conflicting and/or duplicative testing requirements due to overlapping Applicable Requirements. In those instances, please contact the Division Field Services Unit to discuss streamlining the testing requirements. Note that the testing required by this Condition may be used to satisfy the periodic testing requirements specified by the permit for the relevant time period (i.e. if the permit requires quarterly portable analyzer testing, this test conducted under the AOS will serve as the quarterly test and an additional portable analyzer test is not required for another three months). The owner or operator may conduct a reference method test, in lieu of the portable analyzer test required by this Condition, if approved in advance by the Division. Page 25 of 29 COLORADO Air Pollution Control Division Department of Public Health b. Environment Dedicated to protecting and improving the health and environment of the people of Colorado The owner or operator shalt measure nitrogen oxide (NOX) and carbon monoxide (CO) emissions in the exhaust from the replacement engine using a portable flue gas analyzer within seven (7) calendar days of commencing operation of the replacement engine. All portable analyzer testing required by this permit shall be conducted using the Division's Portable Analyzer Monitoring Protocol (ver March 2006 or newer) as found on the Division's web site at: www. colorado. gov/cdphe/ portable -analyzer- monitoring -protocol Results of the portable analyzer tests shall be used to monitor the compliance status of this unit. For comparison with an annual (tons/year) or short term (lbs/unit of time) emission limit, the results of the tests shall be converted to a lb/hr basis and multiplied by the allowable operating hours in the month or year (whichever applies) in order to monitor compliance. If a source is not limited in its hours of operation the test results will be multiplied by the maximum number of hours in the month or year (8760), whichever applies. For comparison with a short-term limit that is either input based (lb/mmBtu), output based (g/hp-hr) or concentration based (ppmvd ® 15% O2) that the existing unit is currently subject to or the replacement engine will be subject to, the results of the test shall be converted to the appropriate units as described in the above -mentioned Portable Analyzer Monitoring Protocol document. If the portable analyzer results indicate compliance with both the NOX and CO emission limitations, in the absence of credible evidence to the contrary, the source may certify that the engine is in compliance with both the NOX and CO emission limitations for the relevant time period. Subject to the provisions of C.R.S. 25-7-123.1 and in the absence of credible evidence to the contrary, if the portable analyzer results fail to demonstrate compliance with either the NOX or CO emission limitations, the engine will be considered to be out of compliance from the date of the portable analyzer test until a portable analyzer test indicates compliance with both the NOX and CO emission limitations or until the engine is taken offline. ne. 2.3 Applicable Regulations for Permanent Engine Replacements 2.3.1 Reasonably Available Control Technology (RACY): Reg 3, Part B II.D.2 All permanent replacement engines that are located in an area that is classified as attainment/maintenance or nonattainment must apply Reasonably Available Control Technology (RACT) for the pollutants for which the area is attainment/maintenance or nonattainment. Note that both VOC and NOX are precursors for ozone. RACT shall be applied for any level of emissions of the pollutant for which the area is in attainment/maintenance or nonattainment, except as follows: In the Denver Metropolitan PM10 attainment/maintenance area, RACT applies to PM10 at any level of emissions and to NOX and SO2, as precursors to PM10, if the potential to emit of NOX or S02 exceeds 40 tons/yr. For purposes of this AOS, the following shall be considered RACT for natural gas fired reciprocating internal combustion engines: Page 26 of 29 110 TM COLORADO Air Pollution Control Division Department of Public Health b. Environment Dedicated to protecting and improving the health and environment of the people of Colorado VOC: The emission limitations in NSPS JJJJ CO: The emission limitations in NSPS JJJJ NOX: The emission limitations in NSPS JJJJ 5O2: Use of natural gas as fuel PM10: Use of natural gas as fuel As defined in 40 CFR Part 60 Subparts GG (5 60.331) and 40 CFR Part 72 (5 72.2), natural gas contains 20.0 grains or less of total sulfur per 100 standard cubic feet. 2.3.2 Control Requirements and Emission Standards: Regulation Number 7, Part E, Sections I.A and B and Section I.D.3 (State -Only conditions). Control Requirements: Section I.A and B Any permanent replacement engine located within the boundaries of an ozone nonattainment area is subject to the applicable control requirements specified in Regulation Number 7, Part E, Section I. B, as specified below: Rich burn engines with a manufacturer's design rate greater than 500 hp shall use a non- selective catalyst and air fuel controller to reduce emission. Lean burn engines with a manufacturer's design rate greater than 500 hp shall use an oxidation catalyst to reduce emissions. The above emission control equipment shall be appropriately sized for the engine and shall be operated and maintained according to manufacturer specifications. The source shall submit copies of the relevant Applicability Reports required under Condition 2.1.2. Emission Standards: Section I.D.3 - State -only requirements Any permanent engine that is either constructed or relocated to the state of Colorado from another state, after the date listed in the table below shall operate and maintain each engine according to the manufacturer's written instructions or procedures to the extent practicable and consistent with technological limitations and good engineering and maintenance practices over the entire life of the engine so that it achieves the emission standards required in the table below: Max En HP g ine Construction Relocation Date or Emission Standards in g/hp-hr NOx CO VOC January 1, 2008 2.0 4.0 1.0 100<Hp<500 January 1 2011 1.0 2.0 0.7 July 1, 2007 2.0 4.0 1.0 500 ≤H p July 1 2010 1.0 2.0 0.7 The source shall submit copies of the relevant Applicability Reports required under Condition 2.1.2. Page 27 of 29 110 TM COLORADO Air Pollution Control Division Department of Public Health b. Environment Dedicated to protecting and improving the health and environment of the people of Colorado 2.3.3 NSPS for stationary spark ignition internal combustion engines: 40 CFR Part 60, Subpart JJJJ A permanent replacement engine that is manufactured on or after 7/1/09 for emergency engines greater than 25 hp, 7/1/2008 for engines less than 500 hp, 7/1/2007 for engines greater than or equal to 500 hp except for lean burn engines greater than or equal to 500 hp and less than 1,350 hp, and 1/1/2008 for lean burn engines greater than or equal to 500 hp and less than 1,350 hp are subject to the requirements of 40 CFR Part 60, Subpart JJJJ. An analysis of applicable monitoring, record keeping, and reporting requirements for the permanent engine replacement shall be included in the Applicability Reports required under Condition 2.1.2. Any testing required by the NSPS is in addition to that required by this AOS. Note that the initial test required by NSPS Subpart JJJJ can serve as the testing required by this AOS under Condition 2.2, if approved in advance by the Division, provided that such test is conducted within the time frame specified in Condition 2.2. Note that under the provisions of Regulation Number 6. Part B, section I.B. that Relocation of a source from outside of the State of Colorado into the State of Colorado is considered to be a new source, subject to the requirements of Regulation Number 6 (i.e., the date that the source is first relocated to Colorado becomes equivalent to the manufacture date for purposes of determining the applicability of NSPS JJJJ requirements). However, as of October 1, 2011 the Division has not yet adopted NSPS JJJJ. Until such time as it does, any engine subject to NSPS will be subject only under Federal law. Once the Division adopts NSPS JJJJ, there will be an additional step added to the determination of the NSPS. Under the provisions of Regulation Number 6, Part B, § 1.8 (which is referenced in Part A), any engine relocated from outside of the State of Colorado into the State of Colorado is considered to be a new source, subject to the requirements of NSPS JJJJ. 2.3.4 Reciprocating internal combustion engine (RICE) MACT: 40 CFR Part 63, Subpart ZZZZ A permanent replacement engine located at either an area or major source is subject to the requirements in 40 CFR Part 63, Subpart ZZZZ. An analysis of the applicable monitoring, recordkeeping, and reporting requirements for the permanent engine replacement shall be included in the Applicability Reports required under Condition 2.1.2. Any testing required by the MACT is in addition to that required by this AOS. Note that the initial test required by the MACT can serve as the testing required by this AOS under Condition 2.2, if approved in advance by the Division, provided that such test is conducted within the time frame specified in Condition 2.2. 2.4 Additional Sources The replacement of an existing engine with a new engine is viewed by the Division as the installation of a new emissions unit, not "routine replacement" of an existing unit. The AOS is therefore essentially an advanced construction permit review. The AOS cannot be used for additional new emission points for any site; an engine that is being installed as an entirely new emission point and not as part of an AOS-approved replacement of an existing onsite engine has to go through the appropriate Construction/Operating permitting process prior to installation. Page 28 of 29 110 TM COLORADO Air Pollution Control Division Department of Public Health b. Environment Dedicated to protecting and improving the health and environment of the people of Colorado ATTACHMENT B: Equipment Covered by Point 004. Activity 01: Gas venting from blowdowns of compressors, fitter separator, and full compressor station'. Equipment Description Equipment ID Internal Volume' (acf) Physical Compressor G3516 Unit 1 200 Compressor G3508 Unit 2 73 Station Blowdown NA 636 Total Fitter Separator NA 150 Information in the table above does not represent final values. The owner or operator must provide a final list to the Division as part of the self -certification process, in accordance with Condition 5. Activity 02: Gas venting from purging of compressors, filter separator, and full compressor station. Equipment Description Equipment ID Internal Volume Physical (acf) Compressor G3516 Unit 1 200 Compressor G3508 Unit 2 73 Total Station Blowdown NA 636 Filter Separator NA 150 Information in the table above does not represent final values. The owner or operator must provide a final list to the Division as part of the self -certification process, in accordance with Condition 5. Page 29 of 29 COLORADO Air Pollution Control Division Department of Public Health & Environment Dedicated to protecting and improving the health and environment of the people of Colorado Ron LePlatt Rockies Express Pipeline, LLC 370 Van Gordon Street Lakewood, Colorado 80228 June 9, 2023 464274 APEN-REQUIRED PERMIT -EXEMPT RE: Permit Application No. 23WE0200 Dear Ron LePlatt: The Air Pollution Control Division (the Division) has reviewed your air emission permit application for the following engine: One (1) Waukesha Model: P48SE Serial Number: TBD Natural Gas -fired, turbocharged, 4 -Stroke rich burn reciprocating internal combustion engine, with a site rated horsepower of 1157 HP. Engine purpose: emergency (max 500 hrs/yr). This engine will be located at the Hereford Ranch Compressor Station, 123-A190-003 in the NESW quadrant of Section 25, Township 12N, Range 63W, Weld County, Colorado. It has been determined that this engine is exempt from permit requirements. The filing of an Air Pollutant Emissions Notice(s) (APEN) is required. The above emission unit is a listed source that is specifically exempt from construction permit requirements, per Regulation No. 3, Part B, Section II.D.1. . D.1. Specifically, this exemption has been granted because the engine is an emergency power generator that operates less than two hundred and fifty (250) hours per year (Regulation 3, Part B, Section II.D.1.c.(ii)). If this engine is replaced with another emergency power generator with less than two hundred and fifty (250) hours per year of operation, this exemption shall remain valid as long as a revised APEN is filed with the Division reflecting the change in equipment. This source shall be limited to a maximum consumption rate as listed below and all other activities, operational rates and numbers of equipment as stated in the application: Consumption of natural gas as fuel shall not exceed 2.47 MMscf per year. 1 COLORADO Air Pollution Control Division Department of Public Health & Environment Dedicated to protecting and improving the health and environment of the people of Colorado Please be advised that annual records of the actual consumption of natural gas shall be maintained by the applicant and made available to the Division for inspection upon request. This exemption from permit requirements is issued in reliance upon the accuracy and completeness of information supplied by the applicant and is conditioned upon construction, installation and operation in accordance with this information and with representations made by the applicant or applicant's agents. YOU MUST notify the Air Pollution Control Division (Division) no later than fifteen days after commencement of operation of this source by submitting a Notice of Startup (NOS) form to the Division. The Notice of Startup (NOS) form may be downloaded online at https: //cdphe.colorado.gov/apens-and-air-permits/make-administrative-changes-to-your- air-permit. The following information shall be provided to the Division within fifteen (15) days of the latter of commencement of operation or issuance of this approval letter. • Serial Number. According to the Division's preliminary analysis, based on the submitted data and information, the equipment identified above will result in the emission of the following air pollutants. Annual fees will be billed for this source in accordance with and in the amounts and limits specified in the provisions of Colorado Revised Statutes section 25-7-114.1. Equipment Facility ID AIRS Point Tons per Year NOx CO VOC EGEN 123/A190/003 0.6 1.3 0.3 It should be noted that although exempted sources may not need air emission permits, they are still required to meet all applicable standards and regulations of the Air Quality Control Commission, including visible emissions shall not exceed 20% opacity. A Revised Air Pollutant Emission Notice (APEN) shall be filed: (Reference: Regulation No. 3, Part A, Section II.C.) ) a. Annually whenever a significant increase in emissions occurs as follows: For any criteria pollutant: For sources emitting less than 100 tons per year, a change in actual emissions of five tons per year or more, above the level reported on the last APEN submitted; or For any non -criteria reportable pollutant: 2 COLORADO Air Pollution Control Division Department of Public Health & Environment Dedicated to protecting and improving the health and environment of the people of Colorado If the emissions increase by 50% or five (5) tons per year, whichever is less, above the level reported on the last APEN submitted to the Division. b. Whenever there is a change in the owner or operator of any facility, process, or activity; or c. Whenever new control equipment is installed, or whenever a different type of control equipment replaces an existing type of control equipment; or d. Whenever a permit limitation must be modified; or e. No later than 30 days before the existing APEN expires. Please refer to the most recent annual fee invoice to determine the APEN expiration date. For any questions regarding a specific expiration date call the Division at (303)-692- 3150. Any changes with respect to the original submittal which would result in increases in either emissions or ambient air impacts, or which would result in the emission of any pollutants not listed in the original submittal, automatically nullifies this exemption. Before actually making any such change, you must apply to the Division for a new exemption based on the anticipated change; if the Division denies the new exemption, you will have to obtain a permit before implementing the change. Sincerely, r Diego Chimendes Permit Engineer Stationary Sources Program Air Pollution Control Division 3 h&k HEREFORD RANCH COMPRESSOR STATION (HEREFORD RANCH CO., TX) RESULTS OF AN ACOUSTICAL ANALYSIS FOR WELD COUNTY, CO Submitted To: Submitted By: Tallgrass Energy 370 Van Gordon Street Lakewood, CO 80228 Hoover & Keith Inc. 11381 Meadowglen Houston, TX 77082, USA Project No. N Number Report Revision Date By 5694 4506 1 25 Jan. 2024 R. H. Keith iiTALLGRASS Noise Assessment Station Development, for a Greenfield Weld Co., Compressor CO Report Hoover 4506, & Keith Revision Inc. 1 Hereford Ranch Compressor Station Page 2 of 14 REPORT SUMMARY In this report, Hoover and Keith, Inc. (H&K) presents the results of acoustical assessment for the proposed development of the Hereford Ranch Compressor Station (Station), a greenfield development in Weld Co., CO. The purpose of the assessment was to compare the expected noise impact of the Station operation with respect to the Colorado Revised Statute § 25-12-103 — Maximum permissible noise levels. Based upon our analysis we believe that the sound levels due to the Station, in full load operation, will not exceed the maximum permissible noise level for an Industrial noise zone. TALLGRASS Noise Assessment Station Development, for a Greenfield Weld Co., Compressor CO Report Hoover 4506, & Keith Revision Inc. 1 Hereford Ranch Compressor Station Page 3 of 14 Table of Contents 1 2 Introduction 4 1.1. Description of the Project 4 Project Noise Criteria 4 3. Estimated Sound Level for the Station Operation at 25 -ft From the Station Property Line 4 4. Description of Noise Mitigation for the Station Equipment5 4.1. Compressor Building 5 4.2. Engine Exhaust System' 5 4.3. JW/AW Cooler 5 4.4. Above Ground Gas Piping 5 4.5. Engine Inlet Air System 6 4.6. ACHE After -Gas Coolers 6 5. Conclusion 6 6. Appendix A: Figures 7 7. Appendix B: Tables. 8 8. Appendix C: Colorado Revised Statutes Title 25. Health § 25-12-103 - Maximum permissible noise levels 9 9. Appendix D: Summary of Typical Metrics for Regulating Environmental Noise & Acoustical Terminology 12 List of Tables Table B1: Estimated Sound Contribution of Station at the a Location Approximately 25 -ft Outside Station Fence Line. 8 List of Figures Figure Al: Trailblazer Conversion Project — Hereford Ranch CS: Station Layout and Noise Evaluation Location 25 -ft Past Nearest Station Fence Line7 iiTALLGRASS Noise Assessment Station Development, for a Greenfield Weld Co., Compressor CO Report Hoover 4506, & Keith Revision Inc. 1 Hereford Ranch Compressor Station Page 4 of 14 1. Introduction In this report, Hoover and Keith, Inc. (H&K) present the results of an environmental sound level assessment associated with the greenfield development of the Herford Ranch Compressor Station (Station). The purpose of this study was to evaluate the expected sound levels, due to the Station operation, with respect to the sound level limits given in the Colorado statutes for the maximum permissible noise levels as revised in 2022. 1.1. Description of the Project The Herford Ranch Compressor Station will be in Weld Co., Co. Figure Al (Appendix A) shows equipment at the Station. The station is scheduled to contain one (1) CAT 3516J Compressor Unit and one (1) CAT 3508J Compressor Unit. Each natural gas compressor unit will be installed within a building. 2. Project Noise Criteria The noise criteria utilized for Weld County CO is given in Colorado Revised Statute § 25- 12-103 — Maximum permissible noise levels. This statute is reproduced in Appendix C of this report. This statute limits the maximum allowable daytime and nighttime A - weighted sound level for four noise zone types. It is our understanding that the Station would be classified as an Industrial noise zone. The normal daily Station operation is assumed to be at full load capacity (i.e. all compressor units in operation) continuously for 24 -hours. Therefore, the maximum allowable sound level, at 25 -ft from the Station property line, would be the nighttime limit of 75 dBA. Figure Al (Appendix A) shows a layout of the equipment at the Station and the nearest noise evaluation locations used to evaluate the noise impact with respect to the Colorado Revised Statute § 25-12-103. 3. Estimated Sound Level for the Station Operation at 25 -ft From the Station Property Line The following sound sources of the Station were considered significant: • Noise generated by the engines and compressors (assumed covered with an enclosure). • Noise of the engine exhaust system, including noise radiated from the exhaust piping (i.e., exhaust piping and expansion joint located between the enclosure and exhaust silencer). iiTALLGRASS Noise Assessment Station Development, for a Greenfield Weld Co., Compressor CO Report Hoover 4506, & Keith Revision Inc. 1 Hereford Ranch Compressor Station Page 5 of 14 • Noise generated by the air inlet system associated with the engine. • Noise radiated from any outdoor aboveground gas piping. • Noise of the JW/AW cooler for the compressor unit. • Noise associated with after -gas cooler. The spreadsheet analysis show on Table B1 (Appendix B) provides the estimated maximum sound level at NSA 1 during the full load operation of the Station equipment (i.e. both compressor units in operation). Based upon this analysis we estimate the sound level at the nearest noise evaluation locations will be approximately 64 dBA. 4. Description of Noise Mitigation for the Station Equipment. The estimated sound level given in Table B1 (Appendix B) assumes the recommended noise mitigation. 4.1. Compressor Building Each engine -compressor unit will be contained in an acoustically insulated building. 4.2. Engine Exhaust System: The engine exhaust system should include a silencer —catalyst system that provides the following minimum dynamic sound insertion loss ("DIL") values at the rated engine operating conditions. DIL Values in dB per O.B. Center Frequency (in Hz) for Engine Exhaust Silencer 31.5 63 125 250 500 1000 2000 4000 8000 15 18 25 30 35 38 38 30 20 4.3. JW/AW Cooler The JW/AW coolers should be specified to not exceed a sound level 65 dBA at a distance of 50 -ft with all fans in operation. 4.4. Above Ground Gas Piping iiTALLGRASS Noise Assessment Station Development, for a Greenfield Weld Co., Compressor CO Report Hoover 4506, & Keith Revision Inc. 1 Hereford Ranch Compressor Station Page 6 of 14 The acoustical analysis indicates that noise control measures, such as acoustical pipe insulation, should not be required for outdoor aboveground gas piping associated with the Stations to meet applicable sound level requirement 4.5. Engine Inlet Air System The engine air inlet should be equipped with "standard" CAT air inlet system (muffler and filter). 4.6. ACHE After -Gas Coolers Each after -gas cooler bay should be specified to not exceed a sound level 65 dBA at a distance of 50 -ft with all fans in operation. 5. Conclusion Utilizing the design information Hoover & Keith has conducted an acoustical assessment for the operation of the Herford Ranch Compressor Station. The results of this assessment were compared to the maximum allowable limit given in the Colorado Revised Statute § 25-12-103 - Maximum permissible noise levels. The Station would be included within the Industrial noise zone, as delineated within the statute. The maximum allowable for this zone is a sound level not to exceed 75 dBA during the nighttime hours of 7:00 p.m. to 7:00 a.m. of the next day at a distance 25 -ft past the Station property line. The estimated sound level due to the Station operation, at this location, is projected to be approximately 64 dBA. Based on this assessment we believe the sound level due to the operation of the Station will comply with the Colorado Revised Statute § 25-12-103 — Maximum permissible noise levels, if the recommended noise mitigation measures are successfully applied. TALLGRASsaiStation Noise Assessment Development, for a Greenfield Weld Co., Compressor CO Report Hoover 4506, & Keith Revision Inc.Inc. 1 Hereford Ranch Compressor Station Page 7 of 14 6. Appendix A: Figures N N.. 3+5O'-0" N. 3+00'-0" SITE CORNER LAT. N40'58.38.4298" LON. W104'23'34.1803" _ PLANT COORDINATES N. 3+20'-0" - E. 1+201-0". EXISTING TRAILBLAZER 36' PIPELINE 230' PERSONNEL GATE N. 2+50'-0" _,—•-.-.- .-.-•—,—.—�-� - - •� N NN N .\ • EXISTING FENCE LINES N. 2+00.-0" N. 1+50'-0" N.. t+.o0'-P' ....... N. 0+50'-0" E. 0+50'-0" N n PROPOSED FENCE l / SITE CORNER LAT. N4O'58'36.2563" LON. W104'23'34.2161" PLANT COORDINATES N. 1+00'-0" E. 1+201-0" — 25-R Past Fence it .r f` I 1 II II II II Y Wt sl int DISCHARGE A FILTER t N. 2+33'-0" SEPARATOR PERSONNEL GATE .I - 200.11 Total Lt N. 1+55"-15/16" tE. 2+10'-1/ic- N, 1+36'-0"_ 1±111,4"_. PROPOSED. FENCE . NEW .42"x8" HOT TAP f,,X"ISO;IN&IIXJ2`PILELWE • SITE CORNER LAT. N40'58'38.4015" LON. W104'23'31.1821" PLANT COORDINATES N. 3+20'-0" ' E. 3+50'-0" I w f N t N du- 2. 59 —4" W FUEL GAS 51gD t»�» r:' II » :-- Ft L aasss, 0 0 COMPRESSOR (CR-5100) WASH WATER SUMP • wASH , WATER oll STORAGE r TANK • N N + • 001 STOR1. TA _ N. 2+57'-0 1/4" I U a X COMPRESSOR EXHAUST STAC4c — 25 -ft Past Fence WASH WATER SUMP ai II . N No T X E 2+50'-0" (CR-5;00) IA SKID LN l -N I I N 14.69'-5' N. LANT STORAGE TANK It_R. 1+55-15/16' Al. 2+5C-1/16" I 9 15/16" 2+55"-3" I. IF56'-4 5/I 20' NEW ACCESS GATE ▪ J SLOWDOWN • S4ENCER • LJ 3cr N. 1+48' ,—. -0 13/16" PROPOSED FENCE I HEREFORD RANCH INTERCONN CUT AND CAP THE COSTING H CONNECTION TO TPC PIPELINE - II I I 6..— EXHS11NG 12" PIPING TO II BE ABANDONED IN PLACE. I I I I PERSONNEL GATE EXISTING EXISTING COALESCING FILTER SEPARATOR METER STATION CP-3 SEE 501.4373-2000002 SITE CORNER LAT, N40'58.36.6352" LON.. WI 04'23'29.980r PLANT COORDINATES N. 1+42'-S" E. 4+44'-4' i m COND DE TIE EXISTING~ CONDENSATE TANK Exi Aci 324'-4' PROPOSED FENCE SIT LA' LO PL N. E - 0 r 0 e, Li 0 + a Li . La: Figure Al: Trailblazer Conversion Project - Hereford Ranch CS: Station Layout and Noise Evaluation Location 25 -ft Past Nearest Station Fence Line. Appendix A: Figures TALLGRASsai Noise Assessment Station Development, for a Greenfield Weld Co., Compressor CO Report Hoover 4506, & Keith Revision Inc. 1 Hereford Ranch Compressor Station Page 8 of 14 7. Appendix B: Tables. Source No. & Dist (Ft) Noise Sources and Other Conditions/Factors associated with Acoustical Analysis PWL or SPL in dB per Unweighed 0.B. Center Frequency (Hz) A -Wt_ Level V31.5 63 r 125 ' 250 500 ' 1000 `. 2000 ` 4000 'V 8000 1) 200 200 200 PWL PWL of of Engine -Driven 2 Engine Compressor Skid -Compressor Units (+3 (1 dB) Unit) 116 119 118 121 118 121 116 119 117 120 115 118 112 115 110 113 108 111 120 123 Atten Misc. Hemispherical Atm. of Atten. Absorption Building (Shielding enclosing Radiation (70% Compressor and/or Foliage) R.H., 60 deg Skids F) -6 0 -44 0 -10 -44 0 0 -18 0 -44 0 -22 0 -44 0 -28 0 -44 0 -30 0 -44 0 -32 0 -44 -1 -35 0 -44 -2 -35 0 -44 -3 51 67 59 53 Source Sound Level Contribution 69 48 44 39 33 30 2) 200 200 200 PWL PWL of of Unsilenced Engine Exhaust Engine for Exhaust 2 Units (1 (+3 Unit) dB) 120 123 125 128 128 131 125 128 122 125 125 128 125 128 115 118 105 108 130 133 Atten Misc. Hemispherical Atm. Source of Atten. Absorption Noise (Shielding Sound Control Radiation (70% Level (Exhaust and/or R.H., 60 Contribution Foliage) Silencer) deg F) -15 0 -44 0 -18 0 -44 0 -25 0 -44 0 -35 0 -44 0 -38 0 -44 0 -40 0 -44 0 -40 0 -44 -1 -30 0 -44 -2 -20 0 -44 -3 52 43 44 44 43 42 64 66 62 49 3) 200 200 200 PWL PWL of of Engine JWAW -Driven Coolers JW/AW Cooler for 2 Units (+3 (1 dB) Unit) 112 115 108 111 102 105 98 101 95 98 92 95 90 93 88 91 85 88 98 101 Atten Misc. Hemispherical Atm. of Atten. Absorption Additional (Shielding Radiation (70% Noise Control and/or R.H., 60 Foliage) deg F) 0 0 -44 0 0 0 -44 0 0 0 -44 0 0 0 -44 0 0 0 -44 0 0 0 -44 0 0 0 -44 -1 0 0 -44 -2 0 0 -44 -3 57 67 61 57 54 51 49 46 42 Source Sound Level Contribution 71 4) 200 200 200 PWL Atten Misc. Hemispherical Atm. Source of of Atten. Absorption Outdoor Additional Sound Aboveground (Shielding Radiation (70% Level Noise and/or R.H., Contribution Piping Control Foliage) 60 deg (All F) Units) 96 0 0 -44 0 98 0 0 -44 0 95 0 0 -44 0 98 0 0 -44 -2 92 0 0 -44 0 88 0 0 -44 0 85 0 0 -44 -1 80 0 0 -44 -2 75 0 0 -44 -3 95 50 54 51 52 48 44 41 35 29 52 5) 200 200 200 PWL PWL of of Engine Engine Air Intake Air Intake w/Filter (1 Unit) for 2 Units (+3 dB) 78 81 80 83 80 83 82 85 85 88 86 89 92 95 100 103 95 98 102 105 Atten of Misc. Atten. Hemispherical Atm. Absorption Source Noise (Shielding Sound Control and/or Radiation (70% R.H., Level Contribution Foliage) 60 deg F) 0 0 -44 0 37 0 0 -44 0 0 0 -44 0 0 0 -44 0 0 0 -44 0 0 0 -44 0 0 0 -44 -1 0 0 -44 -2 0 0 -44 -3 60 39 39 41 44 45 51 58 52 6) 200 200 200 PWL of a Gas Cooler (1 Unit) PWL of Gas Coolers for 2 Units (+3 dB) 112 115 108 111 102 105 98 101 95 98 92 95 90 93 88 91 85 88 98 101 Atten of Misc. Atten. Hemispherical Atm. Absorption any Noise (Shielding Control and/or Radiation (70% R.H., Foliage) 60 deg F) 0 0 -44 0 0 0 -44 0 0 0 -44 0 0 0 -44 0 0 0 -44 0 0 0 -44 0 0 0 -44 -1 0 0 -44 -2 0 0 -44 -3 57 67 61 57 54 51 49 46 42 Source Sound Level Contribution 71 Est'd Total Sound Contribution of All Sources at NSA #1 76 73 67 62 58 56 55 58 53 64.0 Table BI : Estimated Sound Contribution of Station at the a Location Approximately 25 -ft Outside Station Fence Line. Appendix B: Tables iiTALLGRASS Noise Assessment Station Development, for a Greenfield Weld Co., Compressor CO Report Hoover 4506, & Keith Revision Inc. 1 Hereford Ranch Compressor Station Page 9 of 14 8. Appendix C: Colorado Revised Statutes Title 25. Health § 25-12-103 - Maximum permissible noise levels (1) Every activity to which this article is applicable shall be conducted in a manner so that any noise produced is not objectionable due to intermittence, beat frequency, or shrillness. Sound levels of noise radiating from a property line at a distance of twenty- five feet or more therefrom in excess of the db(A) established for the following time periods and zones shall constitute prima facie evidence that such noise is a public nuisance: Zone 7:00 a.m. to 7:00 p.m. to next 7:00 p.m. next 7:00 a.m. Residential 55 db(A) 50 db(A) Commercial 60 db(A) 55 db(A) Light industrial 70 db(A) 65 db(A) Industrial 80 db(A) 75 db(A) (2) In the hours between 7:00 a.m. and the next 7:00 p.m., the noise levels permitted in subsection (1) of this section may be increased by ten db(A) for a period of not to exceed fifteen minutes in any one -hour period. (3) Periodic, impulsive, or shrill noises shall be considered a public nuisance when such noises are at a sound level of five db(A) less than those listed in subsection (1) of this section. (4) This article is not intended to apply to the operation of aircraft or to other activities which are subject to federal law with respect to noise control. (5) Construction projects shall be subject to the maximum permissible noise levels specified for industrial zones for the period within which construction is to be completed pursuant to any applicable construction permit issued by proper authority or, if no time limitation is imposed, for a reasonable period of time for completion of project. (6) All railroad rights -of -way shall be considered as industrial zones for the purposes of this article, and the operation of trains shall be subject to the maximum permissible noise levels specified for such zone. Appendix C: Colorado Revised Statutes Title 25 § 25-12-103 - Maximum permissible noise levels iiTALLGRASS Noise Assessment Station Development, for a Greenfield Weld Co., Compressor CO Report Hoover 4506, & Keith Revision Inc. 1 Hereford Ranch Compressor Station Page 10 of 14 (7) This article is not applicable to the use of property for purposes of conducting speed or endurance events involving motor or other vehicles, but such exception is effective only during the specific period of time within which such use of the property is authorized by the political subdivision or governmental agency having lawful jurisdiction to authorize such use. (8) For the purposes of this article, measurements with sound level meters shall be made when the wind velocity at the time and place of such measurement is not more than five miles per hour. (9) In all sound level measurements, consideration shall be given to the effect of the ambient noise level created by the encompassing noise of the environment from all sources at the time and place of such sound level measurement. (10) This article is not applicable to the use of property for the purpose of manufacturing, maintaining, or grooming machine -made snow. This subsection (10) shall not be construed to preempt or limit the authority of any political subdivision having jurisdiction to regulate noise abatement. (11) This article is not applicable to the use of property by this state, any political subdivision of this state, or any other entity not organized for profit, including, but not limited to, nonprofit corporations, or any of their lessees, licensees, or permittees, for the purpose of promoting, producing, or holding cultural, entertainment, athletic, or patriotic events, including, but not limited to, concerts, music festivals, and fireworks displays. This subsection (11) shall not be construed to preempt or limit the authority of any political subdivision having jurisdiction to regulate noise abatement. (12)(a) Notwithstanding subsection (1) of this section, the public utilities commission may determine, while reviewing utility applications for certificates of public convenience and necessity for electric transmission facilities, whether projected noise levels for electric transmission facilities are reasonable. Such determination shall take into account concerns raised by participants in the commission proceeding and the alternatives available to a utility to meet the need for electric transmission facilities. When applying, the utility shall provide notice of its application to all municipalities and counties where the proposed electric transmission facilities will be located. The public utilities commission shall afford the public an opportunity to participate in all proceedings in which permissible noise levels are established according to the "Public Utilities Law", articles 1 to 7 of title 40, C.R.S. (b) Because of the statewide need for reliable electric service and the public benefit provided by electric transmission facilities, notwithstanding any other provision of law, no Appendix C: Colorado Revised Statutes Title 25 § 25-12-103 - Maximum permissible noise levels iiTALLGRASS Noise Assessment Station Development, for a Greenfield Weld Co., Compressor CO Report Hoover 4506, & Keith Revision Inc. 1 Hereford Ranch Compressor Station Page 11 of 14 municipality or county may adopt an ordinance or resolution setting noise standards for electric transmission facilities that are more restrictive than this subsection (12). The owner or operator of an electric transmission facility shall not be liable in a civil action based upon noise emitted by electric transmission facilities that comply with this subsection (12). (c) For the purposes of this section: (I) "Electric transmission facility" means a power line or other facility that transmits electrical current and operates at a voltage level greater than or equal to 44 kilovolts. (II) "Rights -of -way for electric transmission facilities" means all property rights and interests obtained by the owner or operator of an electric transmission facility for the purpose of constructing, maintaining, or operating the electric transmission facility. Appendix C: Colorado Revised Statutes Title 25 § 25-12-103 - Maximum permissible noise levels iiTALLGRASS Noise Assessment Station Development, for a Greenfield Weld Co., Compressor CO Report Hoover 4506, & Keith Revision Inc. 1 Hereford Ranch Compressor Station Page 12 of 14 9. Appendix D: Summary of Typical Metrics for Regulating Environmental Noise & Acoustical Terminology (1) A -Weighted Sound Level (dBA, Lpa): The A -wt. sound level is a single -figure sound rating, expressed in decibels (Re 20 µPa), which correlates to the human perception of the loudness of sound. The dBA level is commonly used to measure industrial and environmental noise since it is easy to measure and provides a reasonable indication of the human annoyance value of the noise. The following are the relative response of A -weighted filter per octave band frequency, and a graph/curve is provided that shows a graphical representation of the A -wt. filter response per frequency (in Hertz ["Hz"]). 31.5 Hz 63 Hz 125 Hz 250 Hz 500 Hz 1,000 Hz 2,000 Hz 4,000 Hz 8,000 Hz -39.4 dB -26.2 dB -16.1 dB -8.6 dB -3.2 dB 0 dB +1.2 dB +1.0 dB -1.1 dB RELATIVE RESPONSE, 1 dB 10 0 - 10 - 20 - 30 - 40 - 50 � ,,�'' e B BC A • B •/ I r I A 16 31.5 63 125 250 500 1000 2000 4000 8000 16,000 FREQUENCY, Hz Appendix D: Definitions iiTALLGRASS Noise Assessment Station Development, for a Greenfield Weld Co., Compressor CO Report Hoover 4506, & Keith Revision Inc. 1 Hereford Ranch Compressor Station Page 13 of 14 (2) Decibel (dB): A unit for expressing the relative power level difference between acoustical or electrical signals. It is ten times the common logarithm of the ratio of two related quantities that are proportional to power. When adding dB or dBA values, the values must be added logarithmically. For example, the logarithmic addition of 35 dB plus 35 dB is 38 dB. The units for the sound level are decibels (dB) the value of which is determined by: Lp = 20 log (p/pr) Where,p is the acoustic pressure at a specified location in Pascals. pr is the base or reference pressure standardized at 20 micropascals. (3) Dynamic Insertion Loss (DIL): The total sound attenuation due to the installation of the in -line muffler at the actual service flow and temperature and includes the self -noise generated by the flow through the muffler. (4) Equivalent Sound Level (Leq): The equivalent sound level (Leq) can be considered an average sound level measured during a period of time, including any fluctuating sound levels during that period. In this report, the Leq is equal to the level of a steady (in time) A -weighted sound level that would be equivalent to the sampled A -weighted sound level on an energy basis for a specified measurement interval. The concept of the measuring Leq has been used broadly to relate individual and community reaction to aircraft and other environmental noises. (s) Octave Band ("O.B.") SPL: Sound is typically measured in frequency ranges (e.g., high-pitched sound, low-pitched sound, etc.) that provides a more meaningful characterization. Octave band sound emission spectra are sufficient for this type of assessment to account for the effects of the environmental influences. The resulting octave band sound pressure levels can then be used to evaluate the efficacy of proposed noise mitigation options. Standard octave bands from 31 Hz to 8000 Hz cover a frequency range of 22 Hz to 11200 Hz. The geometric mean frequency of standard octave frequency bands used in such analysis procedures are as follows: Appendix D: Definitions iiTALLGRASS Noise Assessment Station Development, for a Greenfield Weld Co., Compressor CO Report Hoover 4506, & Keith Revision Inc. 1 Hereford Ranch Compressor Station Page 14 of 14 Octave Range, Hz Geometric Mean Frequency of Band, Hz Frequency . 2244 31 44-88 63 88-175 125 175-350 250 350-700 500 700-1400 1000 1400-2800 2000 2800-5600 4000 5600-11200 8000 (6) Sound Level Meter ("SLM"): An instrument used to measure sound pressure level, sound level, Q.B. SPL, or peak SPL, separately or in any combinations thereof. The measured weighted SPL (dBA) is obtained by using a standard frequency -filter for attenuating part of the sound spectrum. (7) Sound Power Level (Lw or PWL): Ten times the common logarithm of the ratio of the total acoustic power radiated by a sound source to a reference power. A reference power of a picowatt or 10-12 watt is conventionally used. The units for the sound power level are decibels (dB); the value of which is determined by: Lw = 10 log (W/Wr) Where,W is the acoustic power radiated by the sound source in watts. Wr is the base or reference power standardized at 10-12 watts. (8) Sound Pressure Level (Lp or SPL): Ten times the common logarithm to the base 10 of the ratio of the mean square sound pressure to the square of a reference pressure. Therefore, the SPL is equal to 20 times the common logarithm of the ratio of the sound pressure to a reference pressure (20 micropascals or 0.0002 microbar). The sound pressure level Lp, a measure of the magnitude of the sound pressure at a specific receiver location. The units for the sound level are decibels (dB)the value of which is determined by: Lp = 20 log (p/pr) Where, p is the acoustic pressure at a specified location in Pascals. pr is the base or reference pressure standardized at 20 micropascals. Appendix D: Definitions PRELIMINARY TRAFFIC IMPACT ANALYSIS FOR HEREFORD RANCH COMPRESSOR STATION WELD COUNTY, COLORADO Prepared for: TALLGRASS Prepared by: Primoris Design & Construction, Inc. 10350 Richmond Ave, Suite 1000 Houston, Texas 77042 anti a Primoris Engineering March 4, 2024 Rev 2 Hereford Ranch CS Traffic Impact Analysis Page 12 Table of Contents 1.0 PROJECT DESCRIPTION 3 2.0 EXISTING TRAFFIC 4 3.0 ANTICIPATED TRAFFIC AT NEW SITE 4 List of Figures Figure 1: Location Map 3 Hereford Ranch CS Traffic Impact Analysis Page 13 1.0 PROJECT DESCRIPTION & LOCATION TALLGRASS Hereford Ranch Compressor Station is located approximately 0.08 miles (400 feet) west of County Road 71 in Weld County, Colorado. The site is categorized as a Group B location in reference to the Trailblazer Conversion Project in a rural area. Location: Latitude: 40°58'37.53"N Longitude: 104°23'32.21"W The proposed site development will ultimately include installation of compressors, meter skids, filter separators in addition to supporting equipment encompassing approximately 53,993 SF (1.24 Acres). The site will be graded and covered with gravel at a 1.0% to 1.2% slope. Portions of the site that will not be covered with gravel will be re -seeded with native vegetation. Site access is from an existing private road, approximately 400 -feet west of County Road 71. An aerial showing the regional drainage scheme is provided in Figure 1 below. Proposed Hereford Ranch CS Project Site Existina Easement for the Rex FIGURE 1: LOCATION MAP Hereford Ranch CS Traffic Impact Analysis Page 14 TALLGRASS The facility includes a receipt meter site that receives gas from the customer (Summit Midstream Hereford Plant) and currently discharges that gas to the Trailblazer pipeline. The scope of the project will be to modify the facility to discharge gas to the REX East pipeline. The REX East pipeline operates at a higher pressure than the source facility and pressure increase using compressor units will be necessary. The brownfield station will be a booster compression station. Ancillary equipment needed to support the compressors will be added to the site. 2.0 EXISTING TRAFFIC The existing site includes a small site of approximately 0.30 acres. Access is from a drive extending from the private roadway, approximately 400 feet from County Road 71. This is primarily an unmanned site. Normal Operations (Existing Site): • Passenger Cars/Pickups: • Semi -Trucks: 4 roundtrips per Week 2 roundtrips per Week 3.0 ANTICIPATED TRAFFIC AT NEW SITE 3.1 Traffic Loading for Proposed Site The proposed site will require additional traffic operation and maintenance staff which will increase traffic loading. Additional traffic anticipated at the new Hereford Ranch CS site includes: During Construction: • Passenger Cars/Pickups: 15 roundtrips per Day • Tandem Trucks: 2 roundtrips per Week • Semi -Trucks: 3 roundtrips per Day Normal Operations (Post -Construction): • Passenger Cars/Pickups: • Semi -Trucks: 4 roundtrips per Week 2 roundtrips per Week Hereford Ranch CS Traffic Impact Analysis Page 15 3.2 Access to the Proposed Site TALLGRASS The majority of the traffic will come from US 80 (12.3 miles north of the site), via County Road 71 to the private road leading to the site. Distribution of trips per day to/from the site is approximately 80% from US 80, north of the site. Approximately 20% from the south via State Road 14, via County Road 71 to the site. 3.3 Traffic Distribution for Proposed Site Construction is expected to commence on May 6, 2024, and have a duration of 5 months. All of the traffic will be during business hours from 7 am to 3 pm. Deliveries may encompass Monday through Saturday. PRELIMINARY TRAFFIC IMPACT ANALYSIS FOR HEREFORD RANCH COMPRESSOR STATION WELD COUNTY, COLORADO Prepared for: TALLGRASS (� ENERGY Prepared by: Primoris Design & Construction, Inc. 10350 Richmond Ave, Suite 1000 Houston, Texas 77042 'n3=t Primoris Engineering August 29, 2023 Hereford Ranch CS Traffic Impact Analysis Page 12 Table of Contents TALL RA � SS EPA'E GY 1.0 PROJECT DESCRIPTION 3 2.0 EXISTING TRAFFIC 4 3.0 ANTICIPATED TRAFFIC AT NEW SITE 4 List of Figures Figure 1: Location Map 3 Hereford Ranch CS Traffic Impact Analysis Page 13 1.0 PROJECT DESCRIPTION & LOCATION TALL RA � SS EPA'E GY Hereford Ranch Compressor Station is located approximately 0.08 miles (400 feet) west of County Road 71 in Weld County, Colorado. The site is categorized as a Group B location in reference to the Trailblazer Conversion Project in a rural area. Location: Latitude: 40°58'37.53"N Longitude: 104°23'32.21"W The proposed site development will ultimately include installation of compressors, meter skids, filter separators in addition to supporting equipment encompassing approximately 53,993 SF (1.24 Acres). The site will be graded and covered with gravel at a 1.0% to 1.2% slope. Portions of the site that will not be covered with gravel will be re -seeded with native vegetation. Site access is from an existing private road, approximately 400 -feet west of County Road 71. An aerial showing the regional drainage scheme is provided in Figure 1 below. Existing Easement for the Rex (Rockies Express Pipeline) & Trailblazer Pipeline Co. FIGURE 1: LOCATION MAP Hereford Ranch CS Traffic Impact Analysis Page 14 TALL RA � SS EPA'E G'' The facility includes a receipt meter site that receives gas from the customer (Summit Midstream Hereford Plant) and currently discharges that gas to the Trailblazer pipeline. The scope of the project will be to modify the facility to discharge gas to the REX East pipeline. The REX East pipeline operates at a higher pressure than the source facility and pressure increase using compressor units will be necessary. The brownfield station will be a booster compression station. Ancillary equipment needed to support the compressors will be added to the site. EXISTING TRAFFIC The existing site includes a small site of approximately 0.30 acres. Access is from a drive extending from the private roadway, approximately 400 feet from County Road 71. This is primarily an unmanned site. Normal Operations (Existing Site): • Passenger Cars/Pickups: • Semi -Trucks: 4 trips per Week 2 Trips per Week 3.0 ANTICIPATED TRAFFIC AT NEW SITE 3.1 Traffic Loading for Proposed Site The proposed site will require additional traffic operation and maintenance staff which will increase traffic loading. Additional traffic anticipated at the new Hereford Ranch CS site includes: During Construction: • Passenger Cars/Pickups: 15 trips per Day • Tandem Trucks: 2 Trips per Week • Semi -Trucks: 3 Trips per Day Normal Operations (Post -Construction): • Passenger Cars/Pickups: • Semi -Trucks: 4 trips per Week 2 Trips per Week Hereford Ranch CS Traffic Impact Analysis Page I5 3.2 Access to the Proposed Site TALL RA � SS EPA'E GY The majority of the traffic will come from US 80 (12.3 miles north of the site), via County Road 71 to the private road leading to the site. Distribution of trips per day to/from the site is approximately 80% from US 80, north of the site. Approximately 20% from the south via State Road 14, via County Road 71 to the site. 3.3 Traffic Distribution for Proposed Site All of the traffic will be during business hours from 7 am to 3 pm. Deliveries may encompass Monday through Saturday. FUGITIVE DUST CONTROL PLAN Trailblazer Pipeline Company LLC and Rockies Express Pipeline, LLC Trailblazer Conversion Project Colorado and Nebraska TALLGRASS4 wading Energy Solutions Trailblazer Pipeline Company Trailblazer Conversion Project Fugitive Dust Control Plan LLC October 2022 1 October 2022 Introduction Trailblazer Pipeline Company, LLC (TPC) is seeking authorization from the Federal Energy Regulatory Commission (FERC) pursuant to Section 7(b) of the Natural Gas Act (NGA) to abandon certain natural gas pipeline facilities and associated compressor stations (together the TPC Pipeline Facilities). Rockies Express Pipeline, LLC (REX) is seeking authorization from FERC pursuant to Sections 7(b) and 7(c) of the NGA to (1) abandon capacity on the Rockies Express Pipeline (REX Pipeline) to TPC by lease and (2) construct, install, own, operate, and maintain certain facilities necessary to support the lease service. Together, TPC and REX are the "Applicants," and their collective efforts constitute the Trailblazer Conversion Project (Project). The Project includes two new pipeline laterals and appurtenances, meter and regulating stations, and new compressor stations. Specifically, the Project involves: 1 Abandonment by TPC of 392 -miles of the Trailblazer Pipeline; cut and cap 11 interconnects on the abandoned portion of the Trailblazer pipeline; and cut and cap each end of the abandoned pipeline to isolate the portions of pipe remaining in natural gas service from the portion being abandoned. 2. Abandonment by TPC of three mainline compressor stations. 3. Construction by REX of two new lateral pipeline segments of various diameter in Nebraska totaling approximately 41.0 miles. The REX Lateral to TPC Adams (18.8 miles of 20 -inch -diameter pipeline) and the REX Lateral to TPC East (22.2 miles of 36 - inch -diameter pipeline). 4. Construction by REX of five new interconnect booster compressor stations at existing Trailblazer Pipeline facilities. 5. Install station piping and additional regulation at three existing Trailblazer Pipeline meter stations to enable deliveries into end users or interstate pipeline systems. 6. Expansion of one existing meter station between REX Pipeline and Trailblazer Pipeline. 7. Construction of two new REX meter stations. In addition to the facilities to be abandoned by TPC and constructed by REX under 7(b) and 7(c), respectively, within this Application, Tallgrass Interstate Gas Transmission, LLC (TIGT) and TPC will construct additional facilities under their respective Blanket Authorizations. These facilities are related to the work being proposed in this Application and are considered indirect impacts of the proposed Project. Construction of the Project will involve land disturbing activities, which can increase the susceptibility of soils to erosion caused by wind and water. Wind erosion can damage the productivity of the land by reducing soil moisture, altering soil structure, and carrying away soil nutrients and topsoil. A small amount of soil loss from wind erosion occurs naturally; however, human activity, such as pipeline construction, can dramatically increase soil loss due to wind Trailblazer Conversion Project Fugitive Dust Control Plan 2 October 2022 erosion (fugitive dust) and potentially create conditions that could be detrimental to air quality and safety. Fugitive dust is a type of non -point source air pollution that can cause respiratory distress for construction workers as well as nearby residents and wildlife. Additionally, fugitive dust can create a safety hazard by obscuring visibility for equipment operators, construction personnel, and traffic on public roads near the Project. The Applicants have developed this Fugitive Dust Control Plan as a guide for construction and field personnel on implementation of appropriate measures to minimize and control the generation of fugitive dust during construction activities associated with the Project. It will be the responsibility of the Project contractors, working with the Applicants' field representatives, to identify activities that are generating dust and to at all times control airborne dust levels during construction activities to acceptable levels that are in compliance with applicable standards as listed in the Regulatory Applicability section below. Fugitive Dust Sources The Applicants have attempted to identify the primary potential sources of fugitive dust, which include: • Vegetation clearing activities; • Initial grading of topsoil and subsoil, including cut -and -fill areas on steep slide slopes; • Excavation, temporary side casting of spoil, and backfilling; • Grading associated with reestablishing contours and restoring segregated topsoil; • Vehicle traffic down unimproved public and private access roads; • Vehicle and equipment travel down the Project right-of-way; • Open -bodied trucks hauling sand, soil, gravel, or other materials; and • Activities at Project facilities such as material storage yards, contractor yards, parking areas, and aboveground facility locations. Trailblazer Conversion Project Fugitive Dust Control Plan 3 October 2022 The Applicants' Contractors and field representatives will identify activities that are generating fugitive dust, implement feasible dust abatement techniques or Best Management Practices (BMPs) to control dust, and maintain compliance with applicable fugitive dust regulations. Fugitive Dust Control Measures Dust suppression measures will be employed as necessary to control fugitive dust emissions where construction activities approach dwellings, farm buildings, commercial areas, and other areas occupied by people; where the pipeline parallels an existing road or highway; and where dust could compromise safety or become a public nuisance. This shall also apply to access roads where dust raised by construction vehicles may irritate or inconvenience residents. To minimize wind erosion and fugitive dust emissions during construction, the Applicants will implement the following reasonably available control measures: • Disturb no more earth than required for construction to occur. • Use dust abatement techniques (i.e., applying water) on unpaved or un-vegetated areas or other areas susceptible to wind erosion, including the Project right-of-way, approved work areas, and unpaved roads, at least daily in areas of active construction. Application of dust suppressants will be repeated as necessary and as determined by the Environmental Inspector or REX and TPC representative. • Water for dust control will be obtained from the same municipal source that the hydrostatic test water is obtained from. No unapproved water sources may be used for Project activities including dust control. • Temporarily stockpiled soils (topsoil and spoil) will be sprayed with water or approved chemical dust suppressant to create a semi -hard protective layer to minimize wind erosion, if necessary, and as determined by the Environmental Inspector or REX and TPC representative. (Note: Utilization of chloride containing additives is limited to roads and is not permitted on stockpiled soils.) • Appropriate precautions will be taken to prevent fugitive dust emissions caused by sand blasting from reaching any residence or public building. Curtains of suitable material shall be placed, as necessary, to prevent wind-blown particles from sand blasting operations from reaching any residence or public building. • Emissions from construction equipment combustion, open burning, and temporary fuel transfer systems and associated tanks will be controlled to the extent required by state and local agencies through the permitting process. • Project -related traffic speeds will be controlled on the construction ROW and within other Project facilities; where construction activities approach dwellings, farm buildings, commercial areas, and other areas occupied by people; where the pipeline parallels an existing road or highway; and on unpaved access roads. • When hauling material and operating non-earthmoving equipment, preventing spillage and limiting speeds to 15 miles per hour (mph). • Limit speed of earth -moving equipment to 10 mph. Trailblazer Conversion Project Fugitive Dust Control Plan 4 October 2022 • Speed limits will be decreased when excessive winds prevail and where sensitive areas such as public roads are adjacent to access roads or the construction right -of- way (ROW). • Open -bodied trucks carrying sand, soil, gravel, or other materials will be covered where necessary to prevent such materials from being expelled. • Construction entrance/exit access locations onto paved roads will be cleaned at a minimum of once every 48 hours, or as needed, if materials are observed to be accumulating on the road surface. • In construction areas adjacent to highways where dust could cause poor visibility, REX and TPC will implement additional BMPs to minimize dust and potential safety issues. These additional BMPs may include applying water as close to earth -moving equipment as possible, slowing the speed of construction equipment, spacing equipment further apart, increased traffic control, or shutting down operations during high wind periods. REX and TPC will coordinate with the appropriate highway authorities to ensure adequate traffic control measures are in place, including the possibility of using flaggers to control traffic if extreme low visibility conditions develop. • When opacity along dirt roads and the right-of-way exceeds 20 percent (objects partially obscured), construction activity shall cease until dust control measures are employed. • Other dust control measures, such as the use of wind fences or berms, may also be implemented as needed. • The Environmental Inspector or REX and TPC representatives have the authority to stop work if the contractor does not comply with dust control measures. The frequency of water application will largely depend on weather conditions. Additionally, the Applicants will attempt to begin cleanup and rough grading within 72 hours after backfilling and complete cleanup within 14 days after backfilling, weather and soil conditions permitting. If seasonal or other weather conditions prevent compliance with the time frames, the contractor shall stabilize the right-of-way and maintain erosion and sediment control measures until cleanup can be conducted. Disturbed areas will be permanently revegetated in accordance with applicable permit conditions and landowner requirements. Regulatory Applicability The following air quality agencies are responsible for air quality management in areas of Project construction activities: • Nebraska Department of Environment and Energy — Air Quality Division; • Colorado Department of Public Health and Environment — Air Pollution Control Division This Fugitive Dust Control Plan has been developed to meet the regulatory requirements of the Nebraska Air Quality Regulations in Title 129 of the Nebraska Revised Statutes, Chapter 15, Section 003, and the Colorado Air Pollution Emission Notice (General Construction Permit GP03). Trailblazer Conversion Project Fugitive Dust Control Plan 5 October 2022 4928613 10/31/2023 12:19 PM Total Pages: 9 Rec Fee: $53.00 Carly Koppes - Clerk and Recorder, Weld County , CO This Instrument Drafted by/Return to: Taligrass Energy Attn: Land/ROW Department 370 Van Gordon Street Lakewood, CO 80228 CO-'tE-001.000-17 SURFACE USE AGREEMENT, FACILITY SITE EASEMENT, AND PIPELINE EASEMENT This Surface Use Agreement, Facility Site Easement, ,�,.�and Pipeline Easement ("Agreement") is made this ) day of oL t , 20 �3 by and between, Peters 313 Ranch, Inc., a Colorado Corporation, whose address is PO Box M, Carp enter, WY 82054-0397 ("Grantor"), and Rockies Express Pipeline LLC, a Delaware limited liability company, whose address is 370 Van Gordon Street, Lakewood, CO 80228 ("Grantee"). . e). ThePartiesagreeas follows: For and in consideration of Ten Dollars ($10.00) and other good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, dbed, Grantor does hereby grant, bargain, sell and convey unto Grantee a perpetual and exclusive facility , �l�t� site easement and a permanent pipeline easement, each as further descripted below. The Pipeline Easement and the Facility Site Easement(collectivelythe "F " "Easement") to be located on said Lands, being situated in Weld County, State of Colorado, orado, and more particularly described as follows: Parcel ID: 004326200002 The North Half (N/2) of Section Twenty -Six (26), Township Twelve (12), Range Sixty -Three 6th P.M.g (63) West of the The Facility Site Easement. Grantor grants to Grantee a perpetual an d exclusive facility site easement (the "Facility Site Easement") on the tract of land hereinafter described Lands") Lands ) for the purpose of erecting and constructing thereon, and thereafter maintaining, operating, 4928613 10/31/2023 12:19 PM Paget of9 altering, repairing and removing certain launchers, facilities, . meters,booster facrlxt�es, valves, heaters, pumps, pipelines, other pipeline appurtenances, and structures of any kind machinery,e �' � together with and engines, blowoff valves, compressors, electrical equipment, conduit blowers, measurement equipment, appliances, facilities, appurtenances, meters, towers, communication ommunxcatron lines or equipment, or any other structure as may be necessary. convenient, �'y enrent, or desirable to Grantee in its operations and equipment used, useful, desirable, or convenient connection in connection therewith (collectively, the "Facilities") as is more particularly described and/or depicted on Exhibit "A". The Pipeline Easement. Grantor grants to Grantee a permanent pipeline P peline easement (the "Pipeline Easement") to survey (including, but not limited to, civil, ' environmental, beotecluucal, and cultural surveys), construct, maintain, clear, inspect, test, upgrade, op erate, pb Aerate, repair, replace, modify, change the size of, reconstruct, mark, monitor, patrol, protect, abandon . in place or remove, one pipeline, and all related equipment and appurtenances, below and/or above ground, necessary or convenient for the transportation or transmission of oil, natural gas(including, without limitation, natural gas liquids), petroleum products, water, hydrocarbons and y any other substances, and any products, derivatives, combinations or mixtures of anyforegoing, the including but not limited to, meters, regulators, valves, launchers/receivers, vent pipes, line p p markers, taps, rectifiers, alternating current mitigation, cathodic protection, fiber optic communication cation lines, including enclosures for the aforesaid appurtenances (the pipelines together with such ) appurtenances are collectively referred to herein as, (the "Pipeline") on the Lands the Pipeline Easement comprised of both a permanent easement area twenty-five feet(25')in width on each ° side of the centerline of the Pipeline for a total of fifty feet (50') in width "Permanent Permanent Pipeline Area") Easement Area ) and a temporary easement area of an additional fifty feet (50') in width on one side of the Permanent Pipeline Easement Area, together with any additional temporary work space "TemporaryArea"), p �' P ce (collectively, the nporary Pipeline Easement Area ), as each is more generally described Exhibit "A". and/or depicted on Ingress and Egress to the Easement shall be limited to the route depicted p d as Permanent Access and generally described on Exhibit "A". Additionally, Grantor grants to Grantee a 15' (fifteen foot) perpetual non-exclusive utility P rP util�ty easement to construct, operate, maintain, and remove all necessary or convenient above and below ground communications, telecommunications and electrical facilities and lines,` together with all necessary or convenient above or below ground appurtenances thereto, in, on, under, over, upon and through Grantor's Lands and Grantor's adjacent lands as ,, generally described and depicted on Exhibit "As, The Grantee shall have all other rights and benefits necessary convenient . or n ens ent for the full enjoyment or use of rights granted in this Agreement. Grantee shall have right the to fence or otherwise enclose the Facilities for Grantee's exclusive use. Grantor reserves ' the right to cultivate, use and occupy the Lands not otherwise enclosed by Grantee for any � purpose that is not inconsistent with the rights granted to Grantee and which will not unreasonably - with interfere with or endanger any of the Facilities, the Pipeline or the use thereof by Gits , agents. or contractors. 4928613 10/31/2023 12:19 PM Page 3of9 Grantor shall not, nor shall it allow others acting by or through Grantor to, excavate or otherwise alter the ground elevation or grade, ' remove any soil, construct or place any obstructions, buildings, improvements, fences, engineering works,utilities, • roads, or structures, impound any water, affect the lateral or subjacent support of the Pipeline P or the Facilities, or plant any trees, or shrubs (collectively, the "Prohibited Items") on, through, under, or upon the (i)Site Easement or(ii)the Facility Pipeline Easement, without the prior written ai P consent of Grantee in each case. If any Prohibited Items are placed upon the Site � t3 Easement or the Pipeline Easement without Grantee's prior written consent, Grantee shall have the right, but not the obligation, to (a) enter and remove any such Prohibited Items upon notice to Grantor being (such notice reasonable under the circumstances), at Grantor's cost, or(b)and ' notify require Grantor, at Grantor's cost, to immediately remove any such Prohibited Items. Grantee shall pay all county taxes assessed against the ' ' ' g Facilities or the Pipeline. Grantee agrees to defend, indemnify, and hold harmless Grantor from any any claims by person that are a direct result of the Grantee's use of the Lands. Notwithstanding the foregoing, suchindemnity/hold harmless obligation excludes (i) any claim or cause of action,a or alleged or threatened claim or cause of action, damage, judgment, interest, penalty, or other lo ss tY� arising or resulting from the negligence or intentional acts of Grantor or Grantors' agents, invitees, ztees, or licensees; or third parties, and (ii) any claim for exemplary, punitive, special, or consequential damages . q ial claimed by Grantor. Grantee shall have a the right to assign the Easement and its rights under this Agreement in whole or in part. The obligations, easements, covenants, and other contained rights contained or granted herein shall run with the land and shall be binding g upon and inure nure to the benefit of the Parties respective heirs, successors, and assigns. This Agreement may be executed in any number of count erparts, each of which, when executed and delivered, shall be an original, but all of which shall collectively constitute constitute one and same to instrument. yr y'� the same instrument. If any provision of this Agreement is found to be invalid, illegal, or unenforceable in any respect, such provision shall be deemed to be severed from this Agreement, and the validity, legality and enforceability of the remaining provisions contained herein herein shall not in any way be affectedor impaired thereby. [Signature and acknowledgement on ffollowing page] 4928613 10/31/2023 12:19 PM Page 4of9 TO HAVE AND TO HOLD the Easement rights unto the Grantee, e, Grantee's successors, assigns, personal representatives, and heirs forever. Executed and effective this eaGtay of Caaber2023. GRANTOR: Peters 313 Ranch, Inc., a Colorado Corporation By: Name: .�iohn L. Pacrs Title: Pres :Sea d- Owfier By: Name: Title: er . Anikrsttn V Pi Owner 4928613 10/31/2023 12:19 PM Page 5of9 STATE OF Colorido4 COUNTY OF On this AC "I day of O.�.o in the year 20 before me, the undersigned notary public, personally appeared John L. S4ctt Peters 313 Ranch, Inc., a Colorado Corporation, known to � �me to be the person(s) whose name(s) subscribed to the within instrument, and acknowledged g d that he/she/they executed the same for the purposes therein contained, TIERCE WEAVER NOTARY PUBLIC STATE OF COLORADO NOTARY ID 20224027869 MY COMMISSION EXPIRES JULY 18, 2026 STATE OF Co COUNTY OF I C Yst0A Pe. Notary Public My Commission Expires: eIG On this A GI b day of 0,4-0 -..,� in the year 20 n, before me, the undersigned notary public, personally appeared as V ph, -;"„4, of Peters 313 Ranch, Inc., a Colorado Corporation, known to me to be the person(s) whose name(s). is/are subscribed to the within instrument, and acknowledged g that he/she/they executed the same for the purposes therein contained. TIERCE WEAVER NOTARY PUBLIC STATE OF COLORADO NOTARY ID 20224027869 MY COMMISSION EXPIRES JULY 18, 2026 Notary Public „Cast. "::L My Commission Expires: 4928613 10/31/2023 12:19 PM Page 6of9 GRANTEE: Rockies Express Pipeline LLC, a Delaware limit ed liability company By: Name:. Title: f t C r +es STATE OF o tA0 CtA I D COUNTY OF N to On this the St day of ritur appeared Qtaunt Con 130., as 2023, before me, the undersigned officer, personally e of Rockies Express Pipeline LLC, a Dela ware limited liability company known to me or satisfactorily proven to �be the person whose name is subscribed to the within instrument and acknowledged that s/he executed ed the same for the purposes therein contained, My commission expires: TIERCE WEAVER NOTARY PUBLIC STATE OF COLORADO NOTARY ID 20224027869 MY h l§§IgN W3Ifig§ JULY 1'8,2026 Notary Public 4928613 10/31/2023 12:19 PM Page 7 of 9 7\CO-WE-001.003.1 t Q a Cabrot, Sites\ °towing \ _C0NE. Pregrcm\12- 2 Re34': '._•" 138 VICAUTY MAP EXHIBIT 'A' EXPRESS _- \PRESS PIPELINE - SURFACE SITE SEC 26, TUN & R63W 6TH P.M. WELD COUNTY COLORADO assay (Co--WE--0O1.0O0--17) PETERS 313 RANCH, INC. REC NO. - REC EXEMPT: NO. 0043-26-04 RECXI 2-0092 N90s03 00 E LOT 230.00 i r. 5 Ars SURFACE SITE N90ant:1.3 W i •u i.'C i W �` -Ar'w•.rviMn:>..A'wrvY H»wM.A/bN.vw. fl,,,.aw..nN:nrwAAP••• •Am+vyw..uyY.a.:.✓bNw .. �.%•••••+.-XLcm..y>. V . i Ms.n.LL:w<w.u'if-anreKn.. • LI { V \� •• 7y�• ..r._�...-...r... �_.. in I - F .-a,....tw-<...,, e GaY.b tid ,• gt 1•1•1•1•.: is: F f.. t k 1• .th,dEt.3 4�^6SS ri OAD- Y ✓A GE 2 OF ,r,P !a. A + i•'iFE4 u. D-rrR:1 f`4Y..w if w_ w<4"t. ~.�r•>F~..� /•. ..•.rr r)•t.t ; •t. •C T "!' 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' r•: ata Y'i" "a {y•;r `_Y�r .. _ y ' •ear •W '. •, M r . r.v y /. Y ♦ '4 : Q• � . f. jy i • l y t . ♦ M ( f r." • I: . F w... a. r•a,, J!\': 'l i.`..: s`.•�..,t'.:L •y!a is 91..36 f-• EXIS1ING FENCE • SOW 00 t 42.40' I _1•001 ...- t N. > 600592.8t1 E:'3 X60 55.68 DETAIL -A •.. ••.+ •. Y<., • !‘ ••• i1•-.< - « • w i1• �. �`w •••tA-. > 1•1•1•1• i PARCEL. NO, CO -WE -00D 1.0 -17 PROPERTY OWNER PETERS 313 RANCH INC VESTING REC NC 1811846 SURFACE SITE NAME • HEREFORD RANCH COMPRESSOR STATION LOCATION -SEC 26, Ti2N fv R63W 6TH P.m Y�' •. 1\ iiiistvi tK. (O itic:s Y.•r�, t"., s c :ill, ET t\ I 250 50'.1 GPAr1-Fir. SCatu.E IN T FEE .. r I I I I i EAST LINE Er 1 r SEE DETAIL we P.0.R.. --� •.!^:.r.e •.a.:..., Et t..%• .1 },1" •. t 1•1•/'1•.5. A Q' •: . 4 f, a../+^ �. -\... r 1•1•1•1• Saila Sage Ta 4'.-;X11471 i?A!: -F r M Y'Y ��J- Mt•1 S. e...........] Ni i t: 31 tai 1227.40 ..r. rr-.;..:a•:-..r^1•1•1•1• a SOUTH LINE SEA SEC. 26 M J SE COP. SE/4 SEC 2611.1 2N .u.r. S Va•+- .�..a.11111r1.'�w. -.-,..-x f SURFACE SITE E — 1.2$ AC ADDITIONAL WORKSPACE 2 1 59 AC. (VERSA fct., YIN i t o atm'r gv1n grad..,'' L T1' ct LY Z,t .F' v'+• . Wjfk i4e JK JO NO3III1.7'< PAGE ace* 0000 4928613 10/31/2023 12:19 PM Page 8 of 9 374_Totgro s CON P63W S t' sins fr • • 7 I1 ♦ . ti W •x • I.. . V/C/Nl,�ry MAP 40. sl, •1 ' V CE SIDE SEE SAGE ' OF 3 i N7'44' 3"W 22 .45' 2.45' EXHIBIT A ROCKIES EXPRESS PIPELINE - PERMANENT ACCESS ROAD SEC 26. 112N & R£3W 6TH P.M. WELD COUNTY COLORADO z I- rP.L•.! I N: !600592.75 ,.F1�:37'�.7E E' 3305886 36 (co -WE -001.000-17) PETERS 313 RANCH, INC. REC NO. 1811846 REC EXEMPT: NO. 0043-26-04 RECX12-0092 LOT 'B' 589°21 : -- 385.51' • k.,. Zi T, -1.S • :.:i•.I.'•.1' r. !wt.:f•e J• •1 Pi^?rrwh •s f y w.. ••,, l[. . a'Aa• '�• .. ••> K Pat", • .; Irv= wi » •J •,. NM j: v,.l Y'i./T•r/•t��<.��4•.. Cl•��J.iy:i�il r-'i' iYf .t�•> + p. S,��.•.,z • s..^ ..x ti :7+:ic °• . `E > ••�� sf+us• 5"E.•,l'4y.t,:rf AS -1"t ;.. E..•.''�.Fi'x•i•w< �:*.SfiAr i',vt . i+V$r#.<•...., FSits?. L,1A'r 'f< <., `D ir'•wr[i%i:'�` })�w"rs V t -.x !CC: < rir `4:Jr:W it > • .�. . <. .l. .�. if-� f'• ��..r '' •'s=..°; 3C„ w .•«•.I. ••, •t CC; %"fin. t..,. 47 w > •.,iVO+ %%'>4• , `»t:'.•.:'�"L "'e (i r , • . C.; • .yr.�v SS� i + •... 1•v M4/ .iE<t ISE' •,C �%M•'EY� f 1.4 a.-t'rt'$ c(u: % M w!n. r•iA.'. .. '4•wb,... ':♦ •. r.� ••MW •. Lp r<...rt A':?',�., r ' , .E r.w 1 • .,...n +. ..• s r♦ . i..' v.iT, 'J,rrrz°: / • � .f:... . .. •� s 3 H •� a, •4.v • A!.: rf•:1.. DEI AFL "A I • E «; V it • .4' 1•�.' • h • W !trey...7. ticCzt- .>9 ' r• I.' ^ -M •ti.M.I'a•• •y PARCEL NO: CO -WE -0001.00-17 PROPERTY O'At4ER PETERS 313 FARMS. INC VESTING PEG NC. 1811846 SURFACE SITE NAME HEREFORD RANCH COMPRESSOR STATION ()CATION SEC 26, T12N & R63`•YFf 6Th F M EREVI DRAW CHK : DATE r•..r�wr•.•r.�.� •_I• . L I Mist AAA < 02/23'23 1 ` I i 4 3 i t t\ (iiJRlfff\ :+1 DINVIuut et) R.^.,23 c 1 'EAST LINE fc SE./4 SEC. 26 EXISTINC. FENCED FACILITY P w, , i :4035 741.88 3306274 8{ ''I ,l� , •. iMiyi% fir. .,; ...\r 2r'� :.f.:. Ry• >. r : _:%:r.r • M*.rr.rwwwR - .•u.. • •.`' ft a \n 4.7 ••.• • ....:� "4t .:•.� I i C .;>;. Q' r SWI:D'4:4'c: TOW;t4iPIRj:,C,E .ME —..� ....-.. O Y ACCESS ROAD = 407.96 FT ACCESS ROAD EASEMENT= 0.22 AC Y _ cs r-aagttt Kt' EMERALD MOUNTA!N SURVEYS INC IVERSA GRAPHIC SCALE IN FEET T NE OCR 34,7/4 4Ew 26 T1Zi1 . EAST LINE SE, e< SEC. 4t, - SEE DEAL A C 3O%.1's LI=NE SEC": SEC. 2t ..F ..,...OR Sr/4 e r 26 • 2.I a. •;7, :•a„crt9s .+e1.1"k<>.P•A`•9,F'•! Pp r •.G .Y 6'lk w�tlky{L• • y .44.5; •F^;' I.,ar I en 00 U, O✓ NC. 3r.): 374 FAGE 2 Or 4928613 10/31/2023 12:19 PM Page 9 of 9 EXHIBIT 'A' ROCKIES EXPRESS PIPELINE - LEGAL DESCRIPTIONS SEC 26,112N & R63W 6TH P.M. WELD COUNTY COLORADO SURFACE SITE DESCRIPTION BEING A PERMANENT SURFACE SITE TO BE FOR THE PURPOSE OF ABOVE OR BELOW GROUND APPURTENANCES LOCATED WITHIN A PART OFF THE SOUTHEAST QUARTER iSE/41 OF SECTION TWENT-51X (2Q, TOWNSHIP TWELVE NORTH (Ti 2N RANGE THE 6TH P.M. WELD COUNTY, COLORADO. AS RECORDED IN RECEPTION NUMBER 1811846 (REC NC. 811 184610F THE OFFICE AT WELD Y -THREE WEST [R63W) OF COUNTY CLERK. BEING MORE PARTICULARLY DESCRIBED AS FOLLOWS- COMMENCING (P.C.C.) AT THE SOUTHEAST CORNER (SE COR1 OF THE SOUTHEAST QUARTER (SE/4) CF SAID SECTION TWENTY-SIX (26): THENCE NORTH I 1°':0'31" WEST A DISTANCE OF 1227.4O FEET TO THE POINT OF BEGINNING (P. O.B.): THENCE NORTH 90°O0'+00" WEST A DISTANCE OF 324.36 FEET. THENCE NORTH C°OOOO°QOs" EAST A DISTANCE OF 220.00 FEET: THENCE NORTH 9O'00'00" EAST A DISTANCE OF 230.00 FEET; THENCE SOUTH 00°00'010" EAST A DISTANCE OF 177.60 FEET; THENCE NORTH 90a00` EAST A DISTANCE OF 94.36 FEET; THENCE SOUTH 00600400" EAST A DISTANCE OF 42.40 FEET TO THE POINT OF 13EGINWING (P.O.B.) PERMANENT ACCESS ROAD DESCRIPTION BEING A TWENTY-FOUR (24) FOOT WIDE EASEMENT, TWELVE (12) FEET ON EACH SIDE OF THE FOLLOWING WHOSE SIDELINES EXTEND OR TRIM TO THE EDGES OF THE SUBJECT TRACT: HAVING ARCED TURNOUTS 1O ABUT THE PUBLIC ROAD CROSSING THE SOUTHEAST QUARTER ISE/4! OF SECTION TWENTY-SIX (26). TOWNSHIP TWELVE NORTH (TI2N). RANGE SIXTY-THREE WEST (R63W) OF THE 6TH P.M. WELD COUNTY, COLORADO. AS RECORDED IN RECEPTION NUMBER 1811846 (REC. NO, 1813846) OF THE OFFICE AT WELD COUNTY CLERK, BEING MORE PARTICULARLY DESCRIBED AS FOLLOWS: COMMENCING (P.O.C.) AT THE SOUTHEAST CORNER (SE FEET TO THE POINT OF BEGINNING IF•O.B.1: (_6f THENCE SOUTH 89°21.11' WEST A DISTANCE OF 385.51 FEET; THENCE NORTH 07°44`13" WEST A DISTANCE OF 22.45 FEET TQ THF POINT OF TERMINATION (P.O.T.) .) at 8 1. 1 8 cei are U, - u .1� 8 Nt P:\30 1574Jcflq asu_COHE PARCEL NO. CC -WE -0001.00-17 PROPERTY OWNER. PETERS 313 RANCH. INC VESTING. REC. NO 1811846 SURFACE SITE NAME: HEREFORD RANCHCOMPRESSOR STATION LOCATION' SEC 26. T12N & R63W 6TH P.M, j s,1 (iO127)11% Si t%3 rtl;;_c EMERALD MOUNTAIN SURVEYS tNC w?rrt .z t c«•g. �•g"".a„-,s r ♦S IVERSAL _w, .Y } <... ; !.. xt! ' �G64K V1f.:r.-4 JOB NC >. 301374 PAGE 3 OF 3 Permits, Approvals, and Clearances for Construction, Operation, and Maintenance of the Project (Hereford Ranch Compressor Station) Permit Issuing Agency Submittal Anticipated Submittal Date/ Approval Anticipated Received/ Date Date Status FEDERAL Certificate Convenience Necessity Act Sec 7(b) of Natural Public and and Gas (c) FERC May 2022 Clearance Section Endangered Act (ESA) under 7 of the Species U.S. Wildlife (USFWS) Colorado Fish Service and Region and 6 January 2022 1/30/2023 to Final Project 1/30/23. MBTA with Report 2022. Updated submitted 10/24/22 USFWS receipt 12/14/22 USFWS the Concurrence Plan in of received Biological January MBTA acknowledged to Plan submitted for USFWS review Plan on — Nebraska Migratory Act (MBTA) Bird Treaty USFWS Colorado Nebraska Region and 6 — N/A N/A Section Clean (C WA) 404 Water Permit Act USACE District Omaha January 2022 Notification sent PCN USACE January submitted 3/22/23. to 2022. USACE to COLORADO Construction Application (Hereford Compressor and Compressor Regulating Logan Ranch Station) Permit Station and Colorado Department Public Environment (CDPHE) Pollution Division Health —Air Control (APCD) of of the February 2022 June 2023 Hereford Compressor Permit 6/9/2023. received Ranch Station State Species -listed T&E Colorado Wildlife (CPW) Parks and January 2022 February 2022 CPW "No Prorect responded Concerns" on 2/28/22. on with the Permits, Approvals, and Clearances for Construction, Operation, and Maintenance of the Project (Hereford Ranch Compressor Station) Permit Issuing Agency Submittal Anticipated Submittal Date/ Approval Anticipated Received/ Date Date Status National Preservation (NHPA) Consultation Historic Section Act 106 Colorado Historic Preservation (SHPO) State Office October Addendum January 2021 11/29/2021; 2/1/2022 Concurrence original received 2021. submittal in November on 2022 Concurrence on Addendum received February No.1 2022. Updated UDP sent on 9/12/22 correspondence (copy of to FERC with EIR #1 9/12/22). National Pollutant Colorado September November Discharge Elimination Department of 2023 2023 System Storm General (NPDES) Water Permit Permit, for Public the (CDPHE) Environment Health and Construction Storm Water Discharge Hydrostatic Test Water CDPHE September November Discharge Permit 2023 2023 Utility/Special Use CDOT September November Permit 2023 2023 LOCAL Weld County, CO Use by Special Review Weld County September November (USR) Department of 2023 2023 Planning Services Flood Hazard Weld County September November Development Permit Department of 2023 2023 (FHDP) Planning Services Grading Permit Weld County September November Department of Public 2023 2023 Works Oil & Gas Permit Weld County Planning September November (Building meter skids) permit for and Department Building 2023 2023 Right -of -Way Use Weld County September November Application Department of 2023 2023 Public Works Permits, Approvals, and Clearances for Construction, Operation, and Maintenance of the Project (Hereford Ranch Compressor Station) Permit Issuing Agency Submittal Anticipated Submittal Date/ Approval Anticipated Received/ Date Date Status County Access Permit Weld Department Public County Works of September 2023 November 2023 State Access Permit Colorado Department Transportation of September 2023 November 2023 Weld County Treasurer Statement of Taxes Due Account Number R8967826 Assessed To Parcel 004326200002 P[ I'ERS 313 RANCH INC PO BOX M CARPENTER WY 82054-0397 Legal Desertion NW4 26-12-63 1.01' B REC EXEMP'I RECX12-0092 EXC N2NW4/NW4NE4 EXC MIN Year _ Tax Charge } 2022 Total Tax Charge Tax Interest S308.90 $0.00 Fees $0.00 Situs Address Payments ($308.90) Balance $0.00 $0.00 Grand Total Due as of 01/02/2024 Tax Billed at 2022 Rates for Tax Area 1204 - 1204 Aulhoi ity WELD COUNTY SCHOOL DIS I' RE 12 PAWNEE FIRE AIMS JUNIOR COLLEGE E1IG11 PLAINS LIBRARY WES"l GREELEY CONSERVATION Faxes Billed 2022 * Credit Levy Mill Levy 15 0380000* 5,0430000 12500000 6.3070000 3 18!0000 0.4 140000 31.2330000 Amount Values Actual $148,74 AG -DRY FARM LAND $37,342 $49.87 AG -WASTE LAND $104 $12 36 iota! $37,446 $0.00 Assessed $9,860 $30 2C(23 taxes payable in 4 are not certified. $9.890 reflecidue_____ ALL TAX LIEN SALE AMOUNTS ARE SUBJECT ADVERTISING AND DISTRAINT WARRANT FEES TO CHANGE DUE TO ENDOR�E,I�te C'J i T�t6�,�i��E�l� -5? roll. 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. Signed: Current year's taxes are due but not delinquent. Date: V i Lit) Li 1400 N. 17th Avenue, Greeley, CO 80631. Po Box 458, Greeley, CO 80632. (970) 400-3290 Page 1 of 1 Hello