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HomeMy WebLinkAbout1.00 General Application Materials_Part13UELS, LLCCorporate Office * 85 South 200 EastVernal, UT 84078 * (435) 789-1017 ENGINEERING & LAND SURVEYING PRELIMINARY DRILL RIG LAYOUT SURVEYED BY DRAWN BY SCALE 1" = 60' NOTES: ·Contours shown at 2' intervals. DAYTON SLAUGH 06-29-23 T.L.L.07-10-23 SKR #698-10-BV PADTRACT 72, SECTIONS 10 & 15, T6S, R98W, 6th P.M.GARFIELD COUNTY, COLORADO CHEVRON U.S.A. INC. 60 ' 30 ' 0'60 ' 38130 O LL A H S R AMN HAROL D N ELS O L,&E N S E D&OL O R A D 8S R 9E<OR AL N DO,NA S S E ) O R 3 L REV: 4 11-16-23 T.L.L. (REMOVE FLARE STACK & UPDATE LOD & EXISTING DISTURBANCE) 464 Sand Pad 100'X100' T- b e l t Sand Offload lll l l l l l l l l l l l lll l l l l l l l l l l l lll l l l l l l l l l l l lll l l l l l l l l l l l lll l l l l l l l l l l l lll l l l l l l l Fl o w B a c k Fl o w B a c k Fl o w B a c k Op e n T o p Op e n T o p Op e n T o p Fl o w B a c k AC I D Fu e l FR AFAS UNIT CV X H S E H o u s e FR CV X W S R H o u s e CV X W S R O f f i c e CV X W S R H o u s e BOS Q U E CLO 2 WL R U N W A Y CV X W S R H o u s e MEET I N G T R A I L E R UELS, LLCCorporate Office * 85 South 200 EastVernal, UT 84078 * (435) 789-1017 ENGINEERING & LAND SURVEYING SURVEYED BY DRAWN BY SCALE 1" = 60' NOTES: ·Contours shown at 2' intervals. DAYTON SLAUGH 06-29-23 T.L.L.010-25-23 SKR #698-10-BV PADTRACT 72, SECTIONS 10 & 15, T6S, R98W, 6th P.M.GARFIELD COUNTY, COLORADO CHEVRON U.S.A. INC. 60 ' 30 ' 0'60 ' 38130 O LL A H S R AMN HAROL D N E LS O L,&E N S E D&OLO R A D 8S R9E<OR AL N DO,NA S S E ) O R3 L PRELIMINARY HYDRAULIC STIMULATION LAYOUT REV: 1 11-16-23 T.L.L. (REMOVE FLARE STACK & UPDATE LOD & EXISTING DISTURBANCE) 465 UELS, LLCCorporate Office * 85 South 200 EastVernal, UT 84078 * (435) 789-1017 ENGINEERING & LAND SURVEYING SURVEYED BY DRAWN BY SCALE 1" = 60' DAYTON SLAUGH 06-29-23 T.L.L.07-10-23 SKR #698-10-BV PADTRACT 72, SECTIONS 10 & 15, T6S, R98W, 6th P.M.GARFIELD COUNTY, COLORADO CHEVRON U.S.A. INC. 60 ' 30 ' 0'60 ' FACILITY LAYOUT H A R O LD N E L S ON M A R S HALL 32000 COL O R A D O REGIS T E R E D P R O F E S SIONAL E N GI N EER 11-17-23 REV: 2 11-16-23 T.L.L. (MOVE TANK & UPDATE LOD & EXISTING DISTURBANCE) 466 UELS, LLCCorporate Office * 85 South 200 EastVernal, UT 84078 * (435) 789-1017 ENGINEERING & LAND SURVEYING NOTES: ·Contours shown at 2' intervals. APPROXIMATE UN-RECLAIMED ACREAGE = ±2.349 ACRES APPROXIMATE RECLAIMED ACREAGE = ±4.510 ACRES TOTAL ACREAGE = ±6.859 ACRES INTERIM RECLAMATION LAYOUT SURVEYED BY DRAWN BY SCALE 1" = 60' DAYTON SLAUGH 06-29-23 SKR #698-10-BV PADTRACT 72, SECTIONS 10 & 15, T6S, R98W, 6th P.M.GARFIELD COUNTY, COLORADO CHEVRON U.S.A. INC. 60 ' 30 ' 0'60 ' T.L.L.07.10-23 H A R O LD N E L S ON M A R S HALL 32000 COL O R A D O REGIS T E R E D P R O F E S SIONAL E N G I N EER 11-17-23 Proposed Gas Flowline Disturbance (Within LOD) (To Be Reclaimed)±30'N/A ±207'80Proposed Gas Flowline Disturbance (Outside LOD) (To Be Reclaimed) Proposed Fluids Pipeline Disturbance (Within LOD) (To Be Reclaimed)±30'N/A ±4,981'80Proposed Fluids Pipeline Disturbance (Outside LOD) (To Be Reclaimed) Length (ft)Width (ft) REV: 4 11-16-23 T.L.L. (UPDATE EQUIPMENT, LOD & EXISTING DISTURBANCE) 467 INTERIM RECLAMATION - CROSS SECTIONS SURVEYED BY DRAWN BY SCALE AS SHOWNUELS, LLCCorporate Office * 85 South 200 EastVernal, UT 84078 * (435) 789-1017 ENGINEERING & LAND SURVEYING DAYTON SLAUGH 06-29-23 SKR #698-10-BV PADTRACT 72, SECTIONS 10 & 15, T6S, R98W, 6th P.M.GARFIELD COUNTY, COLORADO CHEVRON U.S.A. INC. T.L.L.07-10-23 REV: 2 11-16-23 T.L.L. (UPDATE LOD) H A R O LD N E L S ON M A R S HALL 32000 COL O R A D O REGIS T E R E D P R O F E S SIONAL E N G I N EER 11-17-23 468 TABLES 469 TABLE 1 CM SELECTION GUIDELINES SKR 698-10-BV Pad ACTIVE COMPLETED INTERIM STABILIZATION FINAL STABILIZATION Pads, Flowlines, and Access Roads Berm Berm Berm Berm Compost Filter Socks Compost Filter Socks Compost Filter Socks Culvert Culvert Culvert Culvert Ditch / Channel Ditch / Channel Ditch / Channel Ditch / Channel Hydro-mulch Hydro-mulch Hydro-mulch Hydro-mulch Riprap Riprap Riprap Riprap Sediment Basin/Detention Pond Sediment Basin/Detention Pond Sediment Basin/Detention Pond Sediment Basin/Detention Pond Seeding Seeding Seeding Seeding Surface Roughening / Ripping Surface Roughening / Ripping Surface Roughening / Ripping Surface Roughening / Ripping Notes: CM = Control Measure (Formerly Best Management Practices) 470 TABLE 2 STRUCTURAL AND NON-STRUCTURAL CM CLASSIFICATION SKR 698-10-BV Pad NON-STRUCTURAL CMs Program Oversight Construction Site Planning and Management Good Housekeeping/Materials Management Construction Phase Plan Review Timing of projects General Construction Site Waste Management Contractor Training and Certification Database Construction Sequencing Spill Prevention, Control, and Countermeasure Plan Development and Maintenance Site Operator CM Inspection and Maintenance Training Preserving Natural Vegetation/Buffer Minimize Initial Pad Site Acreage Slope Pad to the Reserve Pit STRUCTURAL CMs Erosion Control Sediment Control Runoff Control Dust Control Compost Filter Socks Berm Hydro-mulching Sediment Basin / Detention Pond Culvert Riprap Vehicle Tracking Control Ditch / Channel Seeding Surface Roughening / Ripping 471 TABLE 3 POLLUTANT ASSESSMENT AND ASSOCIATED CONTROL MEASURES SKR 698-10-BV Pad SWMP POLLUTANT SOURCE ASSOCIATED PHASE1 TYPICAL MITIGATING CONTROL MEASURES2 Disturbed and Stored Soils Construction Completed Interim - Administrative CMs - Planning CMs - Housekeeping/Materials Management CMs - Erosion Control CMs - Sediment Control CMs - Runoff Control CMs Vehicle Tracking Controls Construction - Administrative CMs - Sediment Control CMs Management of Contaminated Soils Construction Completed Interim - Administrative CMs - Housekeeping/Materials Management CMs Loading/Unloading Operations Construction Completed Interim - Administrative CMs - Housekeeping/Materials Management CMs Outdoor Storage Activities Construction Completed Interim - Administrative CMs - Housekeeping/Materials Management CMs Vehicle/Equipment Maintenance and Fueling Construction - Administrative CMs - Housekeeping/Materials Management CMs Dust/Particle Generation Construction - Administrative CMs - Erosion Control CMs Routine Maintenance Completed Interim - Administrative CMs - Housekeeping/Materials Management CMs On-Site Waste Management Construction Completed Interim - Administrative CMs - Housekeeping/Materials Management CMs Concrete Truck Washing/Equipment Washing NA NA Dedicated Asphalt/Concrete Batch Plants and Masonry Mixing Stations NA NA Non-Industrial Waste Construction Completed Interim - Administrative CMs - Housekeeping/Materials Management CMs Notes: 1Construction stages detailed in Section 2 of the SWMP 2Examples of specific CMs provided in Table 1. CMs to be implemented on a site-specific basis. 472 APPENDICES 473 APPENDIX A SPILL RESPONSE INFORMATION 474 Report release to Foreman and Environmental Representative WITHIN 1 HOUR (Jacob Evans 303-328-5605) UNINTENTIONAL RELEASE OCCURS OR IS DISCOVERED: Unintentional Release includes unplanned spills of liquids, solids , gas or vapors (Incident Reporting Procedure Tier 2). Report all releases as soon as practical Releases resulting in a reportable quantity or reportable event often require immediate notification to Stat e and Federal agencies. Report any amount of a released material via the Chevron Incident Notification Number: 1-888-634-7928 ONLY PERFORM IF SAFE FIRST RESPONDER RESPONSIBILITY CHEVRON BU FACILITY UNINTENTIONAL RELEASE NOTIFICATION PROCEDURE ENVIRONMENTAL REPRESENTATIVE RESPONSIBILITY RECEIVE NOTIFICATION FROM FIELD AND/OR GSOC Does the quantity meet reportable threshold limits? YES REPORTABLE THRESHOLDS INCLUDE: 1) Any amount that impacts or threatens to impact waters of the State of Colorado (which includes surface water, ground water, dry gullies, and storm sewers leading to surface water). 2)For SPCC facilities, more than 1,000 gallons of oil in a single discharge to navigable waters or adjoining shorelines; OR More than 42 gallons of oil in each of two discharges to navigable waters or adjoining shorelines occurring within any twelve -month period. 3) For SQG or LQG facilities release that threatens human health or the environment outside the facility. 4) One (1) barrel or more of E&P waste released outside of berms or other secondary containment. 5) Five (5) barrels or more of E&P oil or waste, regardless of whether the spill/release is completely contained within berms or other secondary containment. 6)Any release of E&P oil or waste that impacts or threatens to impact a residence or occupied structure, livestock, or public byway. 7) Hydrostatic test failure resulting in a release outside of an impervious surface. 8) Any release occurring on Bureau of Land Management property. IMMEDIATELY REPORT THE RELEASE Get EHSR/field leadership buy-in prior to making agency notifications. Follow Unintentional Release Notification Procedures on next page. NO Update & review entry in EHSR Global Event Management System (GEMS) database. Continue incident review & updates until GEMS closure. -Stop the release if ongoing; -Contain any released liquids to prevent further migration; -Identify the type of material released and estimate the quantity. 475 June 25, 2020 Page 1 | 5 CHEVRON BU FACILITY UNINTENTIONAL RELEASE NOTIFICATION PROCEDURE -CONTACT YOUR CHEVRON ENVIRONMENTAL REPRESENTATIVE IMMEDIATELY – -NOTIFY ENVIRONMENTAL MANAGER OF ANY NOTIFICATIONS - THRESHOLD EVENT REGULATORY CITATION AGENCY PHONE REQUIRED TIME FRAME ADDITIONAL ACTIONS 1)Oil or petroleum product which Impacts or threatens to impact waters of the State 40 CFR 110.3 National Response Center 800-424-8802 Within 1 hour of discovery Within 6-hours provide SDS to Federal On-Scene Coordinator. Within 48-hours provide update to revise or confirm initial notice with the amount released, number of fatalities and injuries, and all other significant facts that are known and relevant to the initial report, operator must confirm the estimates in its initial report. 40 CFR 112.4 US EPA Region 8 303-293-1788 Immediately Oil or other substance which may cause pollution of the waters of the state (which includes surface water, ground water and dry gullies or storm sewers leading to surface water), no matter how small. CRS 25-8-601 (2) CDPHE (also represents Colorado Emergency Planning Commission) 877-518-5608 Immediately Written notification must follow within 5 days 40 CFR 355.32-33 Weld County Office of Emergency Management LEPC Within 24-48 hours of discovery Online spill report form: https://www.co.weld.co.us/apps1/oem/spillreport/index.cfm 2)For SPCC facilities, more than 1,000 gallons of oil in a single discharge to navigable waters or adjoining shorelines; OR More than 42 gallons of oil in each of two discharges to navigable waters or adjoining shorelines occurring within any twelve-month period. 40 CFR 112.4 US EPA Region 8 303-293-1788 Immediately 40 CFR 355.32-33 Weld County Office of Emergency Management LEPC Within 24-48 hours of discovery Online spill report form: https://www.co.weld.co.us/apps1/oem/spillreport/index.cfm 476 June 25, 2020 Page 2 | 5 THRESHOLD EVENT REGULATORY CITATION AGENCY PHONE REQUIRED TIME FRAME ADDITIONAL ACTIONS 3)SQG or LQG facility release that threatens human health or the environment outside the facility 6 CCR 1007-3 CDPHE 877-518-5608 Verbally as soon as practicable, but not more than 24 hours 40 CFR 355.32-33 Weld County Office of Emergency Management LEPC Within 24-48 hours of discovery Online spill report form: https://www.co.weld.co.us/apps1/oem/spillreport/index.cfm 4)> 1 barrel of E&P oil or waste outside of berms or containment COGCC Rule 906. Applies only to E&P waste and E&P produced fluids. COGCC Also notify Surface Land Owner 877-518-5608 As soon as practicable, but not more than 24- hours If initial report was not made via COGCC Spill/Release Report Form 19, a Form 19 must be submitted within 72 hours after discovery of the release. A supplemental report on Form 19 shall be submitted within 10 calendar days after discovery of the release. Include topographical map of spill location. Form 19 to be filled out electronically only: https://cogcc.state.co.us/forms/PDF_Forms/form19.pdf 40 CFR 355.32-33 Weld County Office of Emergency Management LEPC Within 24-48 hours of discovery Online spill report form: https://www.co.weld.co.us/apps1/oem/spillreport/index.cfm 5)> 5 barrels of E&P oil or waste, regardless if completely contained or not COGCC Rule 906. Applies only to E&P waste and E&P produced fluids. COGCC Also notify Surface Land Owner 877-518-5608 As soon as practicable, but not more than 24- hours If initial report was not made via COGCC Spill/Release Report Form 19, a Form 19 must be submitted within 72 hours after discovery of the release. A supplemental report on Form 19 shall be submitted within 10 calendar days after discovery of the release. Include topographical map of spill location. Form 19 to be filled out electronically only: https://cogcc.state.co.us/forms/PDF_Forms/form19.pdf 40 CFR 355.32-33 Weld County Office of Emergency Management LEPC Within 24-48 hours of discovery Online spill report form: https://www.co.weld.co.us/apps1/oem/spillreport/index.cfm 477 June 25, 2020 Page 3 | 5 THRESHOLD EVENT REGULATORY CITATION AGENCY PHONE REQUIRED TIME FRAME ADDITIONAL ACTIONS 6)Any release of E&P oil or waste that impacts or threatens to impact a residence or occupied structure, livestock, or public byway. Distance in which a threat is present is not defined. COGCC Rule 906. Applies only to E&P waste and E&P produced fluids. COGCC Also notify Surface Land Owner 877-518-5608 As soon as practicable, but not more than 24- hours If initial report was not made via COGCC Spill/Release Report Form 19, a Form 19 must be submitted within 72 hours after discovery of the release. A supplemental report on Form 19 shall be submitted within 10 calendar days after discovery of the release. Include topographical map of spill location. Form 19 to be filled out electronically only: https://cogcc.state.co.us/forms/PDF_Forms/form19.pdf 40 CFR 355.32-33 Weld County Office of Emergency Management LEPC Within 24-48 hours of discovery Online spill report form: https://www.co.weld.co.us/apps1/oem/spillreport/index.cfm 7)Hydrostatic test failure resulting in a release outside of an impervious surface. CWQCD Policy WQE-10; CRS 25-8-601 (2) CDPHE 877-518-5608 Immediately Refer to Colorado Discharge Permit System (CDPS) Discharge Permit for spill reporting requirements. All non-permitted hydrotest activities require reporting of any release. Non-Reportable spills include: •Releases of potable water from a public water system that do not reach surface waters. •Release to generally impervious surface or structure. •Release that is managed consistent with BMPs established in accordance with a CDPS discharge permit. 478 June 25, 2020 Page 4 | 5 THRESHOLD EVENT REGULATORY CITATION AGENCY PHONE REQUIRED TIME FRAME ADDITIONAL ACTIONS 8)Release on Bureau of Land Management property: Major Undesirable Events: A.Oil, saltwater and toxic liquid spills which result in the release of >100 bbls; B.Equipment failures or other accidents which result in the venting of >500 MCF gas; C.Any fire which consumes the volumes of A and B above; D.Any spill, venting or fire, regardless of the volume involved, which occurs in a sensitive area, e.g., areas such as parks, recreation sites, wildlife refuges, lakes, reservoirs, streams, and urban or suburban areas; E.Each accident which involves a fatal injury. NTL-3A Bureau of Land Management As soon as practicable, but not more than 24 hours Written Report submitted to the District Engineer no later than 15 days following all major undesirable events. All volumes of oil spilled, gas vented, and all hydrocarbons consumed by fire or otherwise lost must be reported monthly on the Monthly Report of Operations (Form 9-329). The volume and value of such losses must also be reported in the Monthly Report of Sales and Royalty (Form 9-361). Other Than Major Undesirable Events: A.Oil, saltwater and toxic liquid spills which result in the release of 10 bbls but <100 bbls of liquid in nonsensitive areas, and all discharges of >100 bbls when the spill is entirely contained by the facility firewall; B.Equipment failures or other accidents which result in the venting of 50 buy <500 MCF gas in nonsensitive areas; C.Any fire which consumes the volumes of A and B above; No oral report required Same written reporting requirements as for Major Undesirable Events detailed above. 479 June 25, 2020 Page 5 | 5 D.Each accident which involves a major or life-threatening injury. NOTE: See the Facility Response Plan for additional contact information E&P Waste is defined in CRS 34-60-103 (4.5) "Exploration and production waste" means those wastes that are generated during the drilling of and production from oil and gas wells or during primary field operations. COGCC Rule 906 requires E&P spills of any size to be cleaned up as soon as practicable. 480 APPENDIX B NRCS CUSTOM SOIL RESOURCE REPORT 481 9 Custom Soil Resource Report Soil Map SKR 698-10-BV Pad 43 8 0 0 4 0 43 8 0 0 8 0 43 8 0 1 2 0 43 8 0 1 6 0 43 8 0 2 0 0 43 8 0 2 4 0 43 8 0 2 8 0 43 8 0 0 8 0 43 8 0 1 2 0 43 8 0 1 6 0 43 8 0 2 0 0 43 8 0 2 4 0 43 8 0 2 8 0 729960 730000 730040 730080 730120 730160 730200 730240 730280 729960 730000 730040 730080 730120 730160 730200 730240 730280 730320 39° 32' 29'' N 10 8 ° 1 9 ' 2 7 ' ' W 39° 32' 29'' N 10 8 ° 1 9 ' 1 1 ' ' W 39° 32' 21'' N 10 8 ° 1 9 ' 2 7 ' ' W 39° 32' 21'' N 10 8 ° 1 9 ' 1 1 ' ' W N Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 12N WGS84 0 50 100 200 300Feet 0 25 50 100 150Meters Map Scale: 1:1,700 if printed on A landscape (11" x 8.5") sheet. Soil Map may not be valid at this scale. 482 Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 44 Happle very channery sandy loam, 3 to 12 percent slopes 5.5 86.6% 46 Happle-Rock outcrop association, 25 to 65 percent slopes 0.9 13.4% Totals for Area of Interest 6.4 100.0% 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 landform segments that have similar use and management requirements. The delineation of such segments on the map provides sufficient information for the Custom Soil Resource Report 12483 9 Custom Soil Resource Report Soil Map SKR 698-10-BV Pad, Access Road, and Flowline/Pipeline 43 7 9 9 0 0 43 8 0 0 0 0 43 8 0 1 0 0 43 8 0 2 0 0 43 8 0 3 0 0 43 8 0 4 0 0 43 8 0 5 0 0 43 8 0 6 0 0 43 8 0 7 0 0 43 8 0 8 0 0 43 8 0 9 0 0 43 8 1 0 0 0 43 8 1 1 0 0 43 8 1 2 0 0 43 8 1 3 0 0 43 8 1 4 0 0 43 8 0 0 0 0 43 8 0 1 0 0 43 8 0 2 0 0 43 8 0 3 0 0 43 8 0 4 0 0 43 8 0 5 0 0 43 8 0 6 0 0 43 8 0 7 0 0 43 8 0 8 0 0 43 8 0 9 0 0 43 8 1 0 0 0 43 8 1 1 0 0 43 8 1 2 0 0 43 8 1 3 0 0 43 8 1 4 0 0 729300 729400 729500 729600 729700 729800 729900 730000 730100 730200 730300 729300 729400 729500 729600 729700 729800 729900 730000 730100 730200 730300 730400 39° 33' 6'' N 10 8 ° 1 9 ' 5 6 ' ' W 39° 33' 6'' N 10 8 ° 1 9 ' 7 ' ' W 39° 32' 16'' N 10 8 ° 1 9 ' 5 6 ' ' W 39° 32' 16'' N 10 8 ° 1 9 ' 7 ' ' W N Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 12N WGS84 0 350 700 1400 2100Feet 0 100 200 400 600Meters Map Scale: 1:7,510 if printed on A portrait (8.5" x 11") sheet. Soil Map may not be valid at this scale. 484 MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils 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 Spoil Area Stony Spot Very Stony Spot Wet Spot Other Special Line Features Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography 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: Douglas-Plateau Area, Colorado, Parts of Garfield and Mesa Counties Survey Area Data: Version 16, Aug 22, 2023 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Jun 24, 2020—Jul 8, 2020 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background Custom Soil Resource Report 10485 MAP LEGEND MAP INFORMATION imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Custom Soil Resource Report 11486 Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 28 Cumulic Haploborolls, 1 to 3 percent slopes 0.4 1.2% 44 Happle very channery sandy loam, 3 to 12 percent slopes 15.9 45.0% 45 Happle very channery sandy loam, 12 to 25 percent slopes 2.6 7.4% 46 Happle-Rock outcrop association, 25 to 65 percent slopes 16.4 46.5% Totals for Area of Interest 35.3 100.0% 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. Custom Soil Resource Report 12487 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 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. Custom Soil Resource Report 13488 Douglas-Plateau Area, Colorado, Parts of Garfield and Mesa Counties 28—Cumulic Haploborolls, 1 to 3 percent slopes Map Unit Setting National map unit symbol: jnv6 Elevation: 5,800 to 7,400 feet Mean annual precipitation: 12 to 18 inches Mean annual air temperature: 40 to 46 degrees F Frost-free period: 80 to 110 days Farmland classification: Prime farmland if irrigated and either protected from flooding or not frequently flooded during the growing season Map Unit Composition Cumulic haploborolls and similar soils:90 percent Minor components:10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Cumulic Haploborolls Setting Landform:Flood plains Down-slope shape:Linear Across-slope shape:Linear Parent material:Wasatch shale formation alluvium and/or green river shale formation alluvium Typical profile H1 - 0 to 8 inches: gravelly sandy clay loam H2 - 8 to 20 inches: very channery sandy clay loam H3 - 20 to 28 inches: clay loam H4 - 28 to 60 inches: stratified very gravelly sand to extremely gravelly loamy sand Properties and qualities Slope:1 to 3 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 (0.20 to 1.98 in/hr) Depth to water table:About 36 to 72 inches Frequency of flooding:Occasional Frequency of ponding:None Calcium carbonate, maximum content:10 percent Maximum salinity:Nonsaline to slightly saline (0.0 to 4.0 mmhos/cm) Available water supply, 0 to 60 inches: Low (about 4.6 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 4e Hydrologic Soil Group: B Ecological site: R048AY285CO - Foothill Swale Hydric soil rating: No Custom Soil Resource Report 14489 Minor Components Other soils Percent of map unit:10 percent Landform:Flood plains Down-slope shape:Linear Across-slope shape:Linear Hydric soil rating: No 44—Happle very channery sandy loam, 3 to 12 percent slopes Map Unit Setting National map unit symbol: jnvs Elevation: 5,200 to 6,000 feet Mean annual precipitation: 12 to 15 inches Mean annual air temperature: 46 to 52 degrees F Frost-free period: 100 to 150 days Farmland classification: Not prime farmland Map Unit Composition Happle and similar soils:80 percent Minor components:20 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Happle Setting Landform:Alluvial fans Down-slope shape:Convex Across-slope shape:Linear Parent material:Green river formation alluvium derived from shale Typical profile H1 - 0 to 7 inches: very channery sandy loam H2 - 7 to 14 inches: very channery sandy loam H3 - 14 to 32 inches: very channery sandy clay loam H4 - 32 to 60 inches: extremely channery sandy loam Properties and qualities Slope:3 to 12 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 (0.57 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 (0.0 to 2.0 mmhos/cm) Custom Soil Resource Report 15490 Available water supply, 0 to 60 inches: Low (about 3.4 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 4e Hydrologic Soil Group: B Ecological site: R034BY306UT - Upland Loam (Wyoming Big Sagebrush) Hydric soil rating: No Minor Components Cumulic haploborolls Percent of map unit:10 percent Hydric soil rating: No Debeque Percent of map unit:10 percent Hydric soil rating: No 45—Happle very channery sandy loam, 12 to 25 percent slopes Map Unit Setting National map unit symbol: jnvt Elevation: 5,400 to 6,200 feet Mean annual precipitation: 12 to 15 inches Mean annual air temperature: 46 to 52 degrees F Frost-free period: 100 to 150 days Farmland classification: Not prime farmland Map Unit Composition Happle and similar soils:80 percent Minor components:20 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Happle Setting Landform:Mountains, alluvial fans Landform position (two-dimensional):Toeslope Landform position (three-dimensional):Mountainflank Down-slope shape:Convex Across-slope shape:Linear Parent material:Green river formation alluvium derived from shale and/or green river formation colluvium derived from shale Typical profile H1 - 0 to 7 inches: very channery sandy loam H2 - 7 to 14 inches: very channery sandy loam H3 - 14 to 32 inches: very channery sandy clay loam H4 - 32 to 60 inches: extremely channery sandy loam Custom Soil Resource Report 16491 Properties and qualities Slope:12 to 25 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 (0.57 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 (0.0 to 2.0 mmhos/cm) Available water supply, 0 to 60 inches: Low (about 3.4 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 6e Hydrologic Soil Group: B Ecological site: R048AY303CO - Loamy Slopes Hydric soil rating: No Minor Components Toska Percent of map unit:10 percent Hydric soil rating: No Debeque Percent of map unit:10 percent Hydric soil rating: No 46—Happle-Rock outcrop association, 25 to 65 percent slopes Map Unit Setting National map unit symbol: jnvv Elevation: 6,200 to 7,200 feet Mean annual precipitation: 12 to 15 inches Mean annual air temperature: 46 to 52 degrees F Frost-free period: 100 to 150 days Farmland classification: Not prime farmland Map Unit Composition Happle and similar soils:50 percent Rock outcrop:35 percent Minor components:15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Custom Soil Resource Report 17492 Description of Happle Setting Landform:Canyons, mountains Landform position (three-dimensional):Mountainflank Down-slope shape:Convex Across-slope shape:Linear Parent material:Green river formation colluvium derived from shale Typical profile H1 - 0 to 7 inches: very channery sandy loam H2 - 7 to 14 inches: very channery sandy loam H3 - 14 to 32 inches: very channery sandy clay loam H4 - 32 to 60 inches: extremely channery sandy loam Properties and qualities Slope:25 to 65 percent Depth to restrictive feature:More than 80 inches Drainage class:Well drained Runoff class: High Capacity of the most limiting layer to transmit water (Ksat):Moderately high to high (0.57 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 (0.0 to 2.0 mmhos/cm) Available water supply, 0 to 60 inches: Low (about 3.4 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 7e Hydrologic Soil Group: B Ecological site: R034BY334UT - Upland Stony Loam (Wyoming big sagebrush) Hydric soil rating: No Description of Rock Outcrop Typical profile H1 - 0 to 60 inches: unweathered bedrock Properties and qualities Slope:40 to 65 percent Depth to restrictive feature:0 inches to lithic bedrock Runoff class: Very high Capacity of the most limiting layer to transmit water (Ksat):Very low to low (0.00 to 0.00 in/hr) Available water supply, 0 to 60 inches: Very low (about 0.0 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 8s Hydric soil rating: No Custom Soil Resource Report 18493 Minor Components Other soils Percent of map unit:15 percent Hydric soil rating: No Custom Soil Resource Report 19494 APPENDIX C SKR 698-10-BV PAD SWMP SITE-SPECIFIC CM (BMP) LIST 495 Site-Specific SKR 698-10-BV Pad Stormwater CMs (BMPs) A summary of structural and non-structural control measures that Chevron will implement at the SKR 698-10-BV Pad is listed below. Structural CMs related to stormwater drainage including channels and detention ponds are depicted on the Figure 2 Layout Drawings. Structural CMs All Phases • Per commitment to CPW for protection of the adjacent waterways and high priority habitats, the facility maintenance tank will be constructed within an impervious, geosynthetic-lined under base, anchored into a metal-sided secondary containment system capable of containing up to 50% of the tanks capacity and any spill or leak from the storage vessel. The post-interim reclamation facility pad area will include a permanent raised berm between the facility maintenance tank and Deer Park Gulch. Additional CPW commitments are addressed within the site-specific wildlife mitigation plan. • Vehicle traffic controls such as rock stabilized construction exits, trackout control mats, or cattle guards will be located on-site near location exits to prevent offsite tracking of soils. The type of control measure will depend on local availability, landowner request, and location specific needs. Any sediment tracked off-site will be swept or scraped from roadways and returned to the construction site by the end of each workday. No sediment will be washed, shoveled, or swept into any roadside ditch, storm sewer, or surface waterbody. Controls will be maintained throughout the life of the location. • Structural CMs will be installed in accordance with the CM manual specification. CM manual available upon request. Construction • Stormwater on this location will drain predominantly to the south. Three channels, one existing and two proposed, will be constructed along the perimeter of the working pad surface. The channels will drain to two proposed detention ponds on the south side of the location to reduce stormwater runoff volume and capture sediment. • A diversion swale will be installed on the northwestern side of the location, to divert run-on and prevent erosion. • Existing topsoil stockpiles are located on the east side of the working pad surface and will be protected against erosion with temporary seeding, hydromulch, surface roughening, or a combination of erosion controls. Additional topsoil will be segregated, stored, and stabilized as required per ECMC rules for future reclamation operations; however, minimal topsoil excavation is anticipated during construction activities. • Riprap will be installed at connections between channels and the detention pond to reduce erosion. • A culvert will be installed under the southeastern, existing access road to convey stormwater from the drainage ditch to the proposed detention ponds. • Mulch with netting or erosion control mats will be installed on all slopes 3:1 and steeper and within 100' of special protection waters or 50' of surface waters. 496 • Pads may be fenced to limit access to cattle and unauthorized travel. CP Fencing should include cattle guards (which may also serve as tracking controls). • Temporary seeding, hydromulching, and/or surface roughening will be conducted along the channels and detention ponds during initial construction and maintained until interim reclamation. Additional soil stabilization and seeding activities will occur during interim reclamation, to ensure vegetative coverage and prevent erosion. Completed, Interim, and Final Stabilization • The three channels, two detention ponds, and one diversion swale will be maintained after interim reclamation as long-term stormwater controls to reduce stormwater runoff volumes and minimize sediment erosion at the location. The channels/swale, ponds, reclaimed disturbance area, and disturbed topsoil stockpiles will be stabilized with seeding, hydromulching, and/or surface roughening. Non-Structural CMs • Chevron will maintain good housekeeping practices including: o Bulk storage containers 55 gallons or greater housed onsite for production operations are stored in secondary containment. o Use of drip pans and or sorbent materials during vehicle maintenance or material handling. o Properly cover/seal material containers. o Conduct routine site inspections. o Promptly address corrective actions identified during inspections. o Maintain stormwater management structures and components. o Routine trash collection and disposal. o Properly labeling significant material containers. o Promote quick spill response/clean up by familiarizing employees and contractors with spill cleanup procedures. o Familiarize employees and contractors with good housekeeping procedures and pollution prevention procedures. • Chevron will design the site with flatter slopes and utilize surface ripping/roughening, and structural surface stabilization control measures including revegetation to increase infiltration rates and minimize erosion potential. • Grading – Grading involves reshaping the ground surface to design elevations. Grading plans will be designed to provide more suitable topography for well pads and pipelines 497 and help to control runoff, soil erosion, and sediment during and after construction in these areas. • During construction near perennial streams, lakes, wetlands, or other State Waters minimum vegetation requirements will be observed, as practicable. • At stream crossings, 50' buffer areas should be maintained. On buffers, clearing, sod disturbances, excavation, and equipment traffic should be minimized. • Activities such as stacking logs, burning cleared brush, discharging rainwater from trenches, welding pipe sections, refueling and maintaining equipment should be accomplished outside of buffers. • Waste management will be handled per the site-specific Waste Mitigation plan. • Dust control will be handled per the site-specific Dust Mitigation plan. • Stored soils will be managed per the site-specific Topsoil Protection Plan. • The site inspection schedule will be followed in compliance with all ECMC and CDHPE requirements listed within this SWMP: o Control Measures (CMs) will be maintained and implemented as required based upon the results of inspection. o Construction Stage:  At least one inspection every 7 calendar days; OR  At least one inspection every 14 calendar days, if post-storm event inspections are conducted within 24 hours following precipitation which causes surface erosion. o Completed Stage:  At least one inspection every 30 calendar days once disturbance activities have ceased and the interim reclamation work has been completed, except that the site has not yet been revegetated. o Interim Stabilization Stage:  At least one inspection every 30 calendar days once the site has undergone seeding. o Final Stabilization Stage:  At least once annually until the site is plugged and abandoned (P&A). o Bond Release: Once equipment has been removed from a location, the site is inspected under an alternate inspection frequency until bond release: • Bi-annual inspection site visits; or 498 • Quarterly visits for locations with “elevated risk,” until location achieves 50% revegetation, with bi-annual inspections thereafter. • Regardless of initial risk categorization, locations with corrective actions will be inspected within 14 days of the corrective measure implementation to ensure satisfactory performance and then returned to their original category. 499 Interim Reclamation Plan Date: 11/10/2023 Location: OGDP SKR 698-10-BV / SKR 698-10-BV Pad Legal Description: Tract 72, SWSW of Section 10 & NWNW of Section 15, Township 6 South, Range 98 West, 6th P.M., Weld County, Colorado 500 Location Information This document provides site-specific information for the SKR 698-10-BV (Skinner Ridge) Pad (referred to as the “Pad”) located within OGDP SKR 698-10-BV. A pre-application meeting with Garfield County, CDPHE, ECMC, CPW, and Chevron was held on October 12, 2023. This application will be an amendment to the existing SKR-66S98W/10 SWSW Pad, permitted with ECMC under location ID #336056. This Pad was initially permitted for the drilling and completion of 22 wells; however, those wells were never drilled. Instead, the location was utilized as the Skinner Ridge Storage Facility, permitted by both ECMC, under location ID #447846, and Garfield County, under permit LIPA 6428. The information in this document relates specifically to the time during the construction, drilling, completion, and production of the two (2) proposed horizontal wells on the well pad portion of the location and the construction and operation of the facility portion of the location, which will receive production from the two wells. Additionally, a pilot hole for geothermal testing will be drilled in one of the wells, but the pilot hole will be plugged prior to drilling the horizontal leg of the well. The existing location is located off Garfield County Road 211 (Clear Creek Road) approximately 16.7 miles northwest of De Beque, Colorado. The Pad lies on Tract 72, and is situated on two sections, the SWSW of Section 10 and the NWNW of Section 15, Township 6 South, Range 98 West, 6th P.M. zoned Resource Lands per Garfield County. The existing Skinner Ridge Storage Facility disturbance area is 6.2 acres, and an additional 0.7 acres of disturbance is proposed for construction of stormwater detention ponds and drainage channels at the SKR 698-10-BV Pad. The working pad surface (WPS) will be 3.8 acres. The Pad disturbance area will be reduced to 2.3 acres during interim reclamation. The Pad is located on Garfield County Parcel 213732100008 owned by Chevron U.S.A., Inc. The location is currently used as a storage yard and all storage equipment and facilities will be relocated prior to drilling the proposed wells. The wells on the SKR 698-10-BV Pad will produce to the proposed production facility portion of the location and be tied into Chevron’s existing Central Production Facility (CPF) via a proposed gas and liquids line. Proposed equipment on the Pad will include separators, pigging stations, a gas meter, pipe skid, an instrument air skid, a skid drain vault, a chemical injection skid, a communication tower, solar skids, a maintenance tank, heat trace equipment, a transformer or electric generators, switchracks, and a battery box. A temporary MLVT, located on the nearby Skinner Ridge-66S98W/22NENW Pad (Location ID# 324358), will be utilized for completion operations. Phase Duration (days) Estimated Start Date Construction (Daylight Only) 10 days 2nd Quarter 2024 Drilling 80 days 3rd Quarter 2024 Completion 23 days 3rd Quarter 2025 Flowback N/A Flowing back directly to permanent facility Production 30 years 3rd Quarter 2025 Interim Reclamation (Daylight Only) 60 days 2nd Quarter 2026 501 Potentially Impacted Parties The Working Pad Surface (WPS) of the SKR 698-10-BV Pad is within 2,000 feet of zero (0) Residential Building Units (RBUs), zero (0) High Occupancy Building Units (HOBUs), and zero (0) Designated Outside Activity Areas (DOAAs). The Pad is located within a Disproportionately Impacted Community (DIC). The location is within ECMC designated High Priority Habitat (HPH) per rule 1202.d for Elk Winter Concentration Area and Elk Severe Winter Range and rule 1202.c for Aquatic Sportfish Management Waters. Site-Specific Details Vegetation The Location is in rangeland. Soils Total area of soil disturbance in acres including accesses and flowline corridors: approximately 16.4 acres, including 6.2 acres of existing disturbance for the Pad. Soil details are included in the attached Natural Resources Conservation Service (NRCS) soil report and summarized below. Pad Soil type(s), 6.9 Disturbed Acres: • 44 – Happle very channery sandy loam, 3 to 12 percent slopes; 46 – Happle-Rock outcrop association, 25 to 65 percent slopes Access Soil type(s)*, 0.1 Disturbed Acres: • 44 – Happle very channery sandy loam, 3 to 12 percent slopes Flowline/Pipeline Corridor Soil type(s)*, 9.5 Disturbed Acres: • 28 – Cumulic Haploborolls, 1 to 3 percent slopes; 44 – Happle very channery sandy loam, 3 to 12 percent slopes; 45 – Happle very channery sandy loam, 12 to 25 percent slopes; 46 – Happle- Rock outcrop association, 25 to 65 percent slopes *NRCS data is not accurate at scale for access roads and flowline corridor. Security The location will be adequately secured per 603.h to restrict access by unauthorized persons. Access/Pipeline/Flowline/Utility The access road disturbance area will impact 0.1 acres. Buried intra-facility flowline corridors will require 9.5 acres of disturbance but will be totally reclaimed. Third-party utility and gathering pipelines are not being permitted as part of this OGDP. 502 Mitigation Measures 1002.a. Fencing Chevron will use CPW-recommended fence designs when consistent with any relevant Local Government requirements. 1002.f. Stormwater Management Temporary seeding, hydro mulching, and/or surface roughening will be performed on the channels and detention ponds during initial pad construction and maintained until interim reclamation, where additional seeding, hydro mulching, and/or surface roughening will also occur at the areas being reclaimed. See the site-specific Stormwater Management Plan for more details regarding stormwater BMPs. 1003.a. General When wells are completed for production, all disturbed areas no longer needed will be restored and revegetated as soon as practicable. All well sites and surface production facilities shall be maintained in accordance with Rule 603. Equipment, Weeds, Waste, and Trash: Debris and waste materials other than de minimis amounts, including, but not limited to, concrete, sack bentonite and other drilling mud additives, sand plastic, pipe and cable, as well as equipment associated with the drilling, re-entry, or completion operations will be removed. All E&P waste shall be handled according to the 900 Series rules. All guy line anchors shall be brightly marked pursuant to Rule 603.j. 1003.b. Areas no Longer in Use All disturbed areas affected by drilling or subsequent operations, except areas reasonably needed for production operations or for subsequent drilling operations to be commenced within twelve (12) months, will be reclaimed as early and as nearly as practicable to their original condition or their final land use as designated by the surface owner and will be maintained to control dust and minimize erosion. If subsidence occurs in such areas, additional topsoil will be added to the depression and the land will be re-leveled as close to its original contour as practicable. All holes unnecessary for further lease operations will be backfilled as soon as possible after the drilling rig is released to conform with surrounding terrain. 1003.c. Compaction Alleviation. All areas compacted by drilling and subsequent oil and gas operations which are no longer needed following completion of such operations will be cross-ripped. Compaction alleviation operations will be undertaken when the soil moisture at the time of ripping is below thirty-five percent (35%) of field capacity. Ripping will be undertaken to a depth of eighteen (18) inches unless bed rock is encountered at a shallower depth. 503 1003.d. Drilling Pit Closure The location will utilize a closed loop drilling system. There will be no pits on location, so no pit closure will be required. 1003.e. Restoration and Revegetation All segregated soil horizons removed from non-crop lands shall be replaced to their original relative positions and contoured as near as practicable to achieve erosion control and long-term stability. Soils shall be tilled adequately to establish a proper seedbed. The disturbed area will be returned to rangeland in the first favorable season following rig demobilization. Chevron will be responsible for backfilling, compacting backfill, reseeding, and re-contouring the surface of any disturbed area. All disturbed areas will be returned to preexisting conditions, as practicable. 1003.f. Weed control During drilling, production, and reclamation operations, all disturbed areas shall be kept free of undesirable plant species designated to be noxious weeds, as practicable. Chevron or onsite contractors will conduct regular visual inspections for weeds and implement weed control measures as needed. Reclamation Monitoring, Inspection, Maintenance, and Reporting Regular monitoring of reclaimed areas will be conducted by a qualified consultant to assess the success of reclamation activities and identify any corrective actions required to achieve success. Any corrective actions recommended by the consultant will be communicated with the appropriate Chevron personnel who will implement the corrective actions and track the status of completion of such actions. Corrective actions may include, but not be limited to, control of weeds and other undesired vegetation, recommendations for soil amendments or additional seeding, and erosion control. The regular monitoring will include qualitative assessments of revegetation success until such time the consultant believes that revegetation has met the appropriate State and/or Federal standards. At that time, the consultant will utilize an appropriate quantitative method for determining revegetation success. Interim Reclamation Completion Notice To evaluate the success of interim reclamation, Chevron will submit a Form 4 Sundry Notice to describe reclamation procedures, associated mitigation measures, changes to final land use, and the total cover of live perennial vegetation. 504 Site-Specific BMPs The following is a list of site-specific BMPs related to Chevron’s interim reclamation approach at the SKR 698-10-BV Pad, for areas that will be reclaimed and not used for continuing oil and gas operations: • Compaction alleviation – compacted soils and areas of the location impacted by construction will be ripped to a minimum depth of 18 inches prior to topsoil replacement. Decompaction will be performed by a parabolic Ag style ripper capable of fracturing the soil ensuring soil layers are not mixed. Proper decompaction will allow for greater water infiltration and promote vegetation growth. • Culvert – culverts are a means of subsurface storm water conveyance where surface transport is not feasible. Culverts are most often used to convey water under a roadway without impeding use of the road. • Culvert protection – culvert protection may be required at the inlet (upstream side) of the culvert and/or the outlet (downstream side) of the culvert. Protection helps to reduce erosion from culverts with concentrated, high velocity flows. • Erosion control – seed/mulch application functions as erosion control during initial reclamation efforts until adequate vegetation has been established on areas not returned to irrigated crop. Once sufficient vegetation has been confirmed, the reclamation will be deemed complete is ECMC and CDPHE Final Stabilization criteria are met. Final Stabilization criteria are discussed in more detail within Chevron’s Storm Water Management Plan (SWMP). The interim working pad will be stabilized against potential erosion with surface armoring. • Fencing – Chevron may fence reclaimed areas until interim reclamation has been achieved to ensure vegetation growth is not overgrazed. Fencing will be installed after seed/mulch application. • Grading – Grading involves reshaping the ground surface to design elevations. Grading provides more suitable topography for well pads and pipelines and helps to control runoff, soil erosion, and sediment during and after construction in these areas. • Mulching – mulching is a temporary erosion control used to stabilize exposed soils while waiting for vegetation establishment. Mulch protects soils from rain impacts and wind erosion, increases infiltration, and helps regulate soil temperatures. Typically, agricultural straw or hay is mechanically applied and crimped in or wood splinters/fibers are surface applied by hand or machinery. Tackifiers may be sprayed over the applied mulch to enhance stabilization. • Placement of soil – any subsoil used during interim reclamation is applied first, followed by topsoil, in order to ensure that topsoil is not contaminated or adulterated and to ensure optimum germination efforts. • Packing of soil layers – if multiple soil layers are applied during interim reclamation, each soil layer is packed separately and sequentially. • Recontouring – documenting the existing topography and natural drainages of the site prior to disturbance and reestablishing the topography and contours on the reclamation to pre- disturbance conditions. 505 • Routine inspections – Chevron, and/or third-party contractors, conduct routine and regularly scheduled inspections during which the reclamation and general site conditions are inspected and monitored. • Seedbed preparation – after decompaction, recontouring, and topsoil application, the top 3-4 inches of soil will be prepared for seed application using a high-speed disk and/or a mulcher as needed. Seedbed will be void of earthen clods and firm enough to keep seed from being applied too deeply. Soil samples will be collected and analyzed prior to seed application to identify any required amendments. Compost and fertilizer will be applied based on current site conditions and on an as needed basis. • Seeding – to establish perennial vegetative cover following construction, is the best long term stabilization control for areas not stabilized with other permanent controls (pavement, concrete, road base, etc.). Establishing perennial vegetation stabilizes the soil, reduces wind and water erosion, minimizes sheet flow, increases infiltration, and reduces overall runoff volumes. Seeding can be used to establish temporary stabilization when dirt moving activities have ceased and will not resume for an extended period of time, or as a final stabilization technique as part of the reclamation plan for a site. • Seed mix – the seed mix for reclaimed areas that will not be returned to irrigated crop operations will be selected in coordination with qualified Chevron personnel and/or the NRCS. • Stockpile management – stockpile management is the protection of stockpiled erodible materials through structural and nonstructural practices. • Surface armor – surface armor is a combination of various materials (e.g., clay, concrete, dirt, rock, etc.) used to stabilize a surface on location where erosion could occur. The armor reduces erosion caused by runoff and raindrop impact, and it provides a stable working surface for various construction related activities. Surface armor is often utilized throughout the life of a location and can be incorporated on access roads, tank battery locations, and well head locations. • Timing of reclamation – seeding of areas not returned to irrigated crop will occur during interim reclamation, after compaction alleviation, topsoil application, recontouring, and seedbed preparation, and will be conducted during a spring or fall planting window to achieve maximum germination rates. • Topsoil salvage – the salvage and proper handling of topsoil is one of the keys to reclamation success. Existing topsoil stockpiles exist at the location and will be used for revegetation of disturbed areas during interim reclamation. Topsoil will be managed per the site-specific topsoil protection plan. • Training – employee training on spill prevention, stormwater, and associated practices and procedures is essential to ensuring that everyone has the knowledge needed to follow appropriate steps and be able to minimize potential impacts resulting from stormwater related incidents. • Weed control – invasive plants will be managed by performing a site assessment during the spring and upon completion of the first growing season after interim reclamation. This assessment will identify and inventory any/all invasive plants on the location. The assessment will include GPS coordinates and maps detailing the location of the invasive plants. Management 506 will be performed by either mowing or spraying and in some rare occasions both methods may be necessary. Routine inspections throughout the life of the pad will also aid in identifying when weed mitigation is needed. Supplemental Information Exhibits/References/Appendices NRCS Custom Soil Resource Report Layout Drawings Location Pictures 507 9 Custom Soil Resource Report Soil Map SKR 698-10-BV Pad 43 8 0 0 4 0 43 8 0 0 8 0 43 8 0 1 2 0 43 8 0 1 6 0 43 8 0 2 0 0 43 8 0 2 4 0 43 8 0 2 8 0 43 8 0 0 8 0 43 8 0 1 2 0 43 8 0 1 6 0 43 8 0 2 0 0 43 8 0 2 4 0 43 8 0 2 8 0 729960 730000 730040 730080 730120 730160 730200 730240 730280 729960 730000 730040 730080 730120 730160 730200 730240 730280 730320 39° 32' 29'' N 10 8 ° 1 9 ' 2 7 ' ' W 39° 32' 29'' N 10 8 ° 1 9 ' 1 1 ' ' W 39° 32' 21'' N 10 8 ° 1 9 ' 2 7 ' ' W 39° 32' 21'' N 10 8 ° 1 9 ' 1 1 ' ' W N Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 12N WGS84 0 50 100 200 300Feet 0 25 50 100 150Meters Map Scale: 1:1,700 if printed on A landscape (11" x 8.5") sheet. Soil Map may not be valid at this scale. 508 Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 44 Happle very channery sandy loam, 3 to 12 percent slopes 5.5 86.6% 46 Happle-Rock outcrop association, 25 to 65 percent slopes 0.9 13.4% Totals for Area of Interest 6.4 100.0% 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 landform segments that have similar use and management requirements. The delineation of such segments on the map provides sufficient information for the Custom Soil Resource Report 12509 9 Custom Soil Resource Report Soil Map SKR 698-10-BV Pad, Access Road, and Flowline/Pipeline 43 7 9 9 0 0 43 8 0 0 0 0 43 8 0 1 0 0 43 8 0 2 0 0 43 8 0 3 0 0 43 8 0 4 0 0 43 8 0 5 0 0 43 8 0 6 0 0 43 8 0 7 0 0 43 8 0 8 0 0 43 8 0 9 0 0 43 8 1 0 0 0 43 8 1 1 0 0 43 8 1 2 0 0 43 8 1 3 0 0 43 8 1 4 0 0 43 8 0 0 0 0 43 8 0 1 0 0 43 8 0 2 0 0 43 8 0 3 0 0 43 8 0 4 0 0 43 8 0 5 0 0 43 8 0 6 0 0 43 8 0 7 0 0 43 8 0 8 0 0 43 8 0 9 0 0 43 8 1 0 0 0 43 8 1 1 0 0 43 8 1 2 0 0 43 8 1 3 0 0 43 8 1 4 0 0 729300 729400 729500 729600 729700 729800 729900 730000 730100 730200 730300 729300 729400 729500 729600 729700 729800 729900 730000 730100 730200 730300 730400 39° 33' 6'' N 10 8 ° 1 9 ' 5 6 ' ' W 39° 33' 6'' N 10 8 ° 1 9 ' 7 ' ' W 39° 32' 16'' N 10 8 ° 1 9 ' 5 6 ' ' W 39° 32' 16'' N 10 8 ° 1 9 ' 7 ' ' W N Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 12N WGS84 0 350 700 1400 2100Feet 0 100 200 400 600Meters Map Scale: 1:7,510 if printed on A portrait (8.5" x 11") sheet. Soil Map may not be valid at this scale. 510 MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils 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 Spoil Area Stony Spot Very Stony Spot Wet Spot Other Special Line Features Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography 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: Douglas-Plateau Area, Colorado, Parts of Garfield and Mesa Counties Survey Area Data: Version 16, Aug 22, 2023 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Jun 24, 2020—Jul 8, 2020 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background Custom Soil Resource Report 10511 MAP LEGEND MAP INFORMATION imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Custom Soil Resource Report 11512 Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 28 Cumulic Haploborolls, 1 to 3 percent slopes 0.4 1.2% 44 Happle very channery sandy loam, 3 to 12 percent slopes 15.9 45.0% 45 Happle very channery sandy loam, 12 to 25 percent slopes 2.6 7.4% 46 Happle-Rock outcrop association, 25 to 65 percent slopes 16.4 46.5% Totals for Area of Interest 35.3 100.0% 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. Custom Soil Resource Report 12513 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 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. Custom Soil Resource Report 13514 Douglas-Plateau Area, Colorado, Parts of Garfield and Mesa Counties 28—Cumulic Haploborolls, 1 to 3 percent slopes Map Unit Setting National map unit symbol: jnv6 Elevation: 5,800 to 7,400 feet Mean annual precipitation: 12 to 18 inches Mean annual air temperature: 40 to 46 degrees F Frost-free period: 80 to 110 days Farmland classification: Prime farmland if irrigated and either protected from flooding or not frequently flooded during the growing season Map Unit Composition Cumulic haploborolls and similar soils:90 percent Minor components:10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Cumulic Haploborolls Setting Landform:Flood plains Down-slope shape:Linear Across-slope shape:Linear Parent material:Wasatch shale formation alluvium and/or green river shale formation alluvium Typical profile H1 - 0 to 8 inches: gravelly sandy clay loam H2 - 8 to 20 inches: very channery sandy clay loam H3 - 20 to 28 inches: clay loam H4 - 28 to 60 inches: stratified very gravelly sand to extremely gravelly loamy sand Properties and qualities Slope:1 to 3 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 (0.20 to 1.98 in/hr) Depth to water table:About 36 to 72 inches Frequency of flooding:Occasional Frequency of ponding:None Calcium carbonate, maximum content:10 percent Maximum salinity:Nonsaline to slightly saline (0.0 to 4.0 mmhos/cm) Available water supply, 0 to 60 inches: Low (about 4.6 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 4e Hydrologic Soil Group: B Ecological site: R048AY285CO - Foothill Swale Hydric soil rating: No Custom Soil Resource Report 14515 Minor Components Other soils Percent of map unit:10 percent Landform:Flood plains Down-slope shape:Linear Across-slope shape:Linear Hydric soil rating: No 44—Happle very channery sandy loam, 3 to 12 percent slopes Map Unit Setting National map unit symbol: jnvs Elevation: 5,200 to 6,000 feet Mean annual precipitation: 12 to 15 inches Mean annual air temperature: 46 to 52 degrees F Frost-free period: 100 to 150 days Farmland classification: Not prime farmland Map Unit Composition Happle and similar soils:80 percent Minor components:20 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Happle Setting Landform:Alluvial fans Down-slope shape:Convex Across-slope shape:Linear Parent material:Green river formation alluvium derived from shale Typical profile H1 - 0 to 7 inches: very channery sandy loam H2 - 7 to 14 inches: very channery sandy loam H3 - 14 to 32 inches: very channery sandy clay loam H4 - 32 to 60 inches: extremely channery sandy loam Properties and qualities Slope:3 to 12 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 (0.57 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 (0.0 to 2.0 mmhos/cm) Custom Soil Resource Report 15516 Available water supply, 0 to 60 inches: Low (about 3.4 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 4e Hydrologic Soil Group: B Ecological site: R034BY306UT - Upland Loam (Wyoming Big Sagebrush) Hydric soil rating: No Minor Components Cumulic haploborolls Percent of map unit:10 percent Hydric soil rating: No Debeque Percent of map unit:10 percent Hydric soil rating: No 45—Happle very channery sandy loam, 12 to 25 percent slopes Map Unit Setting National map unit symbol: jnvt Elevation: 5,400 to 6,200 feet Mean annual precipitation: 12 to 15 inches Mean annual air temperature: 46 to 52 degrees F Frost-free period: 100 to 150 days Farmland classification: Not prime farmland Map Unit Composition Happle and similar soils:80 percent Minor components:20 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Happle Setting Landform:Mountains, alluvial fans Landform position (two-dimensional):Toeslope Landform position (three-dimensional):Mountainflank Down-slope shape:Convex Across-slope shape:Linear Parent material:Green river formation alluvium derived from shale and/or green river formation colluvium derived from shale Typical profile H1 - 0 to 7 inches: very channery sandy loam H2 - 7 to 14 inches: very channery sandy loam H3 - 14 to 32 inches: very channery sandy clay loam H4 - 32 to 60 inches: extremely channery sandy loam Custom Soil Resource Report 16517 Properties and qualities Slope:12 to 25 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 (0.57 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 (0.0 to 2.0 mmhos/cm) Available water supply, 0 to 60 inches: Low (about 3.4 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 6e Hydrologic Soil Group: B Ecological site: R048AY303CO - Loamy Slopes Hydric soil rating: No Minor Components Toska Percent of map unit:10 percent Hydric soil rating: No Debeque Percent of map unit:10 percent Hydric soil rating: No 46—Happle-Rock outcrop association, 25 to 65 percent slopes Map Unit Setting National map unit symbol: jnvv Elevation: 6,200 to 7,200 feet Mean annual precipitation: 12 to 15 inches Mean annual air temperature: 46 to 52 degrees F Frost-free period: 100 to 150 days Farmland classification: Not prime farmland Map Unit Composition Happle and similar soils:50 percent Rock outcrop:35 percent Minor components:15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Custom Soil Resource Report 17518 Description of Happle Setting Landform:Canyons, mountains Landform position (three-dimensional):Mountainflank Down-slope shape:Convex Across-slope shape:Linear Parent material:Green river formation colluvium derived from shale Typical profile H1 - 0 to 7 inches: very channery sandy loam H2 - 7 to 14 inches: very channery sandy loam H3 - 14 to 32 inches: very channery sandy clay loam H4 - 32 to 60 inches: extremely channery sandy loam Properties and qualities Slope:25 to 65 percent Depth to restrictive feature:More than 80 inches Drainage class:Well drained Runoff class: High Capacity of the most limiting layer to transmit water (Ksat):Moderately high to high (0.57 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 (0.0 to 2.0 mmhos/cm) Available water supply, 0 to 60 inches: Low (about 3.4 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 7e Hydrologic Soil Group: B Ecological site: R034BY334UT - Upland Stony Loam (Wyoming big sagebrush) Hydric soil rating: No Description of Rock Outcrop Typical profile H1 - 0 to 60 inches: unweathered bedrock Properties and qualities Slope:40 to 65 percent Depth to restrictive feature:0 inches to lithic bedrock Runoff class: Very high Capacity of the most limiting layer to transmit water (Ksat):Very low to low (0.00 to 0.00 in/hr) Available water supply, 0 to 60 inches: Very low (about 0.0 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 8s Hydric soil rating: No Custom Soil Resource Report 18519 Minor Components Other soils Percent of map unit:15 percent Hydric soil rating: No Custom Soil Resource Report 19520 UELS, LLCCorporate Office * 85 South 200 EastVernal, UT 84078 * (435) 789-1017 ENGINEERING & LAND SURVEYING NOTES: ·Contours shown at 2' intervals. CONSTRUCTION LAYOUT - PLAN VIEW SURVEYED BY DRAWN BY DAYTON SLAUGH 06-29-23 SCALE D.R.B.05-01-23 1" = 60' SKR #698-10-BV PADTRACT 72, SECTIONS 10 & 15, T6S, R98W, 6th P.M.GARFIELD COUNTY, COLORADO CHEVRON U.S.A. INC. 60 ' 30 ' 0'60 ' HA R O LD N E L S ON M A R S HALL 32000 COL O R A D O REGIS T E R E D P R O F E S SIONAL E N GI N EER 11-17-23 REV: 5 11-16-23 T.L.L. (REMOVE FLARE STACK & UPDATE LOD & EXISTING DISTURBANCE) 521 MEET I N G T R A I L E R UELS, LLCCorporate Office * 85 South 200 EastVernal, UT 84078 * (435) 789-1017 ENGINEERING & LAND SURVEYING CONSTRUCTION LAYOUT - DETAIL SHEET SURVEYED BY DRAWN BY DAYTON SLAUGH 06-29-23 SCALE T.L.L.07-10-23 1" = 60' SKR #698-10-BV PADTRACT 72, SECTIONS 10 & 15, T6S, R98W, 6th P.M.GARFIELD COUNTY, COLORADO CHEVRON U.S.A. INC. 60 ' 30 ' 0'60 ' REV: 4 11-16-23 T.L.L. (UPDATE LOD & LABELS) H A R O LD N E L S ON M A R S HALL 32000 COL O R A D O REGIS T E R E D P R O F E S SIONAL E N G I N EER 11-17-23 522