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2021.07.30_MGS_O&G V MODERN GEOSCIENCES TRUSTED ENVIRONMENTAL ADVISORS DATE July 12, 2021 PROJECT 21125 ReportPadsite Inspection ATTN City of Denton Padsite No. 140(ACME) 215 East McKinney Street Operator: Endeavor Denton,Texas 76201 Location: ® City of Denton ❑ Denton ETJ Priority: ❑ High ® Moderate ❑ Low Modern Geosciences, LLC (Modern) is pleased to provide the attached Padsite Inspection Report documenting the results of our recent inspection and monitoring events at the above-referenced padsite. A general summary of findings is presented below with detailed results provided in the attached report. ■ Field Inspection Results: As part of the field inspection efforts, Modern evaluated the padsite concerning general ordinance or operational requirements set forth by the City. No operational or ordinance compliance issues were noted by Modern during our inspection efforts. ■ Near-Equipment Inspection Results: Our inspection efforts at this padsite included near- equipment monitoring using optical gas imaging (OGI) to identify leaks of methane and/or volatile organic compounds (VOCs) and radiation meters to identify equipment exhibiting naturally-occurring radioactive material (NORM) above applicable regulatory criteria. The accumulation of scale within equipment can cause elevated NORM levels requiring proper signage and equipment management. A summary of near-equipment findings is presented below with further detail in the attached report. Near Equipment Equipment Number Leaks* Unlabeled NORM** Labeled NORM** Wells 4 0 0 4 Separators 6 0 0 4 ASTs 11 0 0 8 Other 1 4 1 0 101 0 *OGI leaks identified exclude operational low bleed components(<6 scf/hr) **NORM exceeding 50 µR/hr ***An RRC site-specific determination was made in March 2018(detailed in near-equipment summary) All near-equipment inspection concerns (e.g., leaks) were communicated to the operators with a two-week period to address each. If the concerns were not addressed, these are included in the Action Items listed below. If items were addressed, this will be documented in the report. 5100 THOMPSON TERRACE,COLLEYVILLE,TEXAS 76034 1 F 682.223.1593 1 P 682.223.1322 www.MODERNGEOSCIENCES.com V MODERN GEOSCIENCES TRUSTED ENVIRONMENTAL ADVISORS ■ Fenceline Inspection Results: Our inspection efforts for this padsite included an evaluation of air quality at representative upwind and downwind points at the padsite boundary. Our approach utilized a variety of equipment to screen for potential impacts that could affect air quality off of the padsite or suggest additional monitoring may be warranted. Please refer to the report for additional detail on our findings. Fenceline inspection did not identify air quality concerns above program screening goals. ■ Action Items: If items are identified during our inspection that remain unresolved or require future confirmation, these will be listed as individual action items for the operator until the City has confirmed further action is not required. There are no outstanding Action Items as of the date of this report. ■ Next Inspection Event: The City of Denton completes periodic inspections at all padsites throughout the year. In addition to this, the City has asked Modern to perform supplemental inspections with high-resolution equipment based on proximity to sensitive property uses. Based on the current prioritization, this padsite is scheduled to be inspected again by Modern in the first half of 2022. CLOSING We appreciate the opportunity to provide our services to you. Should you require additional information or have any questions regarding this report, please contact the undersigned at 682.223.1322. Respect Ily submitte , nneth .Tramm, PhD, G, CHMM Senior Program Manager MODERN GEOSCIENCES Texas Registered Geoscience Firm 50411 Texas Registered Engineering Firm F-16201 5100 THOMPSON TERRACE,COLLEYVILLE,TEXAS 76034 I F 682.223.1593 I P 682.223.1322 www.MODERNGEOSCIENCES.com <S MODERN GEOSCIENCES TRUSTED ENVIRONMENTAL ADVISORS DATE July 12, 2021 PROJECT 21125 PADSITE INSPECTION REPORT Padsite No. 140—ACME PREPARED FOR City of Denton 215 East McKinney Street Denton,Texas 76201 PREPARED BY REVIEWED BY Zachar ondr GIT e eth S.kramm, PhD, PG,�' HMM PROJECT MANAGER SENIOR PROGRAM MANAGER 5100 THOMPSON TERRACE,COLLEYVILLE,TEXAS 76034 1 IF 682.223.1593 1 r 682.223.1322 0 2021 MODERN GEOSCIENCES.ALL RIGHTS RESERVED. www.MODERNGEOSCIENCES.com PADSITE INSPECTION REPORT Padsite Name:ACME(#140) Operator: Endeavor Inspection Date:06108121 ►nspectors:ZT, D W MODERN G E O S C I E N C E S TRUSTED ENVIRONMENTAL ADVISORS FIELD INSPECTION RESULTS: Pass Fail N/A General Inspection Checklist Items Item 1: Appropriate signage present at padsite entrance including operator name, ® ❑ ❑ site address, well names, 24 hr phone number, and no smoking. Comments: None Item 2: Appropriate signage present at padsite entrance and/or equipment including ❑ ❑ ❑ RRC/API numbers. Comments: None ❑ ❑ ❑ Item 3: Fencing present surrounding padsite and/or equipment. Comments: None ❑ ❑ ❑ Item 4: Site secured. Gates locked to control unauthorized access. Comments: None ❑ ❑ ❑ Item 5: Surface topography prevents areas with significant water collection. Comments: None ❑ ❑ ❑ Item 6: Surface free of stains or other signs of significant spills/releases. Comments: None ® ❑ ❑ Item 7: Padsite free of trash/waste debris. Comments: None ❑ ❑ ® Item 8: Lighting not directed toward adjacent property/roads (as applicable). Comments: None ® ❑ ❑ Item 9:All equipment painted with no bare pipe present. Comments: Minor corrosion noted as potential future action item. ® ❑ ❑ Item 10: Landscaping appears well maintained (as applicable). Comments: None ❑ ❑ ® Item 11: Lightning arrestors present at ASTs and in good condition (as applicable). Comments: Not applicable—grandfathered in using grounding system. ❑ ❑ ® Item 12: Pipeline markers present at roads (as applicable). Comments: None Item 13: Tank battery and secondary containment appear to have integrity with no ® ❑ ❑ significant corrosion. Comments: None ® ❑ ❑ Item 14: Remote compressed air foam line (fire suppression) present. Comments: None ® ❑ ❑ Item 15:Access road accommodates 20'wide emergency vehicle requirements. Comments: None Item 16: Water/oil transfer points within secondary containment or have drip control ® ❑ ❑ accessory to minimize spillage during waste transfer. Comments: None ® ❑ ❑ Item 17:Tank battery has appropriate hazardous material signage. Comments: None ❑ ❑ ® Item 18: Ponded water(Pit) has fencing and access controls. Comments: Not applicable—ponded water not present. Item 19: Other Audio,Visual, or Olfactory concerns noted during the inspection. ® ❑ ❑ Comments: Water noted in well cellars. According to the City Inspector, water was removed as of April 12, 2019, thus the water observations are no longer considered Action Items. PROJECT 21125 1 JULY 12,20211 PAGE 1 www.MODERNGEOSCIENCES.com PADSITE INSPECTION REPORT Padsite Name:ACME(#140) Operator: Endeavor Inspection Date:06108121 ►nspectors:ZT, D w MODERN G E O S C I E N C E S TRUSTED ENVIRONMENTAL ADVISORS • •' At Equipment: 10,000 ppmv 1 50 µR/hr z Equipment: OGI Camera Radiation Meter Resolution: 3,000-10,000 ppmv 1 µR/hr Constituent: Methane tV0Cs H2S NORM Fenceline: 500 ppmv 3 0.1 ppmv n 0.08 ppmv 5 20 µR/hr 6 Equipment: DPIR Meter PID HzS Meter Radiation Meter Resolution: 1 ppmv 0.001 ppmv 0.003 ppmv 1 µR/hr Notes: 1-Utilizes the Interstate Natural Gas Association of America(INGAA)recommended leak definition within their December 4,2015 response to EPA Docket No. EPA-HQ-OAR-2010-0505 — "Oil and Natural Gas Sector: Emission Standards for New and Modified Sources," dated September 18,2015 (80 FIR 56593). Also represents 20%of the Lower Explosive Limit. A lower leak definition and additional inspection and reporting may be required at facilities subject to 40 CFR §60 Subpart OOOOa. Documented continuous low-bleed components (<6 scf/hr) and intermittent emissions from properly functioning pneumatic devices are not considered leaks for the purposes of this inspection. 2-The Texas Railroad Commission (RRC) regulates NORM under 16 TAC §4 (Environmental Protection, Subchapter F, Oil and Gas NORM). Subchapter F establishes the requirements for oil and gas NORM waste disposal for the purpose of protecting public health and the environment. NORM-contaminated equipment is defined in Subchapter F as "equipment that, at any accessible point, exhibits a minimum radiation exposure level greater than 50 µR/hr including background radiation level." When identified, the equipment suspected of being NORM-containing will be communicated to the City and operator(s) to allow further inspection and where appropriate compliance with RRC signage and management requirements. 3-Represent half of the American Conference of Governmental Industrial Hygienists (ACGIH) 8-hour threshold limit value (TLV) of 1,000 ppmv(0.1%by volume)set for potential cardiac sensitization and central nervous system depression. 4-Consistent fenceline concentrations of 0.1 ppmv could indicate a potential off-site air quality exceedance of applicable TCEQ Air Monitoring Comparison Values (AMCVs) or Effect Screening Levels (ESLs). Further sampling will be needed to confirm the individual compounds present and direct regulatory comparison. 5-Indicative of possible 30 TAC§112.31(30-min avg.)exceedance of 0.08 ppmv. Further sampling will be needed to confirm the 30-minute average and allow direct regulatory comparison. 6-EPA average background criteria established under Document No.402-R-08-005;April 2008. Reported background ranged from 10 µR/hr to 85 µR/hr. Elevated fenceline observations may require further screening to confirm attenuated levels near sensitive receptors. PROJECT 21125 1 JULY 12,20211 PAGE 2 www.MODERNGEOSCIENCES.com PADSITE INSPECTION REPORT Padsite Name:ACME(#140) Operator: Endeavor Inspection Date:06108121 Inspectors:ZT, DW MODERN G E O S C I E N C E S TRUSTED ENVIRONMENTAL ADVISORS NEAR EQUIPMENT INSPECTION RESULTS: INSPECTIC JILTS - UN Location ID: Leaks (OGI): NORM (ItR/hr; max): Date Reported': Date Addressed': Well A None 55 NA NA Well B None 210 NA NA Well C None 360 NA NA Well D None 110 NA NA General Notes: An RRC site-specific determination was made in March 2018 to allow general signage for NORM at the padsite entrance point rather than labelling individual equipment per 16 TAC §4.605. This observation is recorded for reporting purposes, but not considered an action item per the attached regulatory determination. It should be noted that tracking NORM per individual component will allow improved conformance with 16 TAC §4.635(c)(1), which requires equipment identification for public safety purposes. A copy of the RRC determination is included as an attachment. Minor corrosion noted on wells. No other concerns noted. 1—Reported to operator,•Z—If reported to Modern by operator/City,• *NORM exceeding 50 µR/hr not labeled INSPECTION RESULTS— SEPARATORS Location ID: Leaks (OGI): NORM (jiR/hr; max): Date Reported': Date Addressed Separator A None 80 NA NA Separator B None 210 NA NA Separator C Actuator 240 NA NA Separator D None 110 NA NA Separator E None <15 NA NA Separator F None <15 NA NA General Notes: The NORM observations were labeled prior to Modern's inspection. Minor corrosion noted on separators. No other concerns noted. 1—Reported to operator;z—If reported to Modern by operator/City; *NORM exceeding 50 µR/hr not labeled INSPECTION RESULTS—TANK BATTERY ASTs Location ID: Leaks (OGI): NORM (�tR/hr; max): Date Reported': Date Addressed AST A None 120 NA NA AST B None 260 NA NA AST C None 75 NA NA AST D None 125 NA NA AST E None 180 NA NA AST F None 310 NA NA AST G None 190 NA NA AST H None 210 NA NA AST None <15 NA NA ASTJ None <15 NA NA AST K None <15 NA NA General Notes: The NORM observations were labeled prior to Modern's inspection. Minor corrosion noted on AST piping. ASTs I, J, and K noted as frac water tanks. No other concerns noted. 1—Reported to operator,•Z—If reported to Modern by operator/City,• *NORM exceeding 50 µR/hr not labeled PROJECT 21125 1 JULY 12,20211 PAGE 3 www.MODERNGEOSCIENCES.com PADSITE INSPECTION REPORT Padsite Name:ACME(#140) Operator: Endeavor Inspection Date:06108121 Inspectors:ZT, DW MODERN G E O S C I E N C E S TRUSTED ENVIRONMENTAL ADVISORS NEAR EQUIPMENT INSPECTION RESULTS (CONT.): INSPECTIO Location ID: Leaks (OGI): NORM (�tRffir; max): Date Reported': Date Addressed Compressor A None <15 NA NA Ancillary A None <15 NA NA Ancillary B None <15 NA NA Ancillary C None <15 NA NA General Notes: No other concerns noted. 1—Reported to operator,•2—If reported to Modern by operator/City; *NORM exceeding 50 µR/hr not labeled PROJECT 21125 1 JULY 12,20211 PAGE 4 www.MODERNGEOSCIENCES.com PADSITE INSPECTION REPORT Padsite Name:ACME(#140) Operator: Endeavor Inspection Date:06108121 ►nspectors:ZT, DW MODERN G E O S C I E N C E S TRUSTED ENVIRONMENTAL ADVISORS FENCELINE INSPECTION RESULTS: - -• • •• Avg. Wind Direction (to): N Avg. Wind Speed (mph): 2.1 Bar. Pressure ("Hg): 29.25 • Avg.Temp (°F): 78.5 Humidity (%): 73.7 Precipitation: N/A Fenceline Screening Criteria: Yes No N/A Upwind Observations: Downwind Observations:- 1 PID > 100 ppbv(0.1 ppmv)? ❑ ® ❑ <1 ppbv <1 ppbv 1 Radiation >20 µR/hr? ❑ ® ❑ <15 µR/hr <15 µR/hr 1 H2S>80 ppbv(0.08 ppmv)? ❑ ® ❑ <5 ppbv <5 ppbv 1 Methane >500 ppmv? ❑ ® ❑ <5 ppmv <5 ppmv Other perimeter/fenceline observations suggestive of releases or concerns: None Comments: None Notes: 1- Represents the maximum discrete sampling result recorded by Modern across fenceline screening alignment. General Inspection Program Notes: 1- Modern confirmed operation of all field equipment in accordance with manufacture specifications and Modern's standard operating procedures prior to field inspection efforts. This included the use of zero and prepared calibration samples. 2- Modern's services were performed in a manner consistent with a level of care and skill ordinarily exercised by other members of our profession practicing in the same locality, under similar conditions and at the time the services were performed. The scope of services performed was in accordance with the scope of work agreed with by our client, as set forth in our proposal and related authorization agreement(s). 3- Laws, regulations and professional standards applicable to Modern's services are continually evolving. Techniques are, by necessity, often new and relatively untried. Different professionals may reasonably adopt different approaches to similar problems. As such,our services are intended to provide our client with a source of professional advice, opinions and recommendations based on a limited number of field observations and tests, collected and performed in accordance with the generally accepted practice that exists at the time, and may depend on,and be qualified by,information gathered previously by others and provided to Modern by our Client. Modern does not warrant the work of third parties supplying information used in the report. 4- The monitoring results collected as part of these services represent field conditions at the time of inspection or monitoring only. Samples or monitoring data collected at other times may reveal different results that are representative of site conditions during other periods of time. The use of monitoring efforts is not intended to replace laboratory methodology, but rather provide data indicative of when additional efforts may be warranted. Modern's air sampling is consistent with current regulatory guidance and/or manufacturer specification. For a higher level of certainty, our monitoring methods can be expanded over longer periods of time and/or supplemented by use of a state-accredited laboratory when evaluation of specific COCs is desired or further verification is needed. PROJECT 21125 1 JULY 12,20211 PAGE 5 www.MODERNGEOSCIENCES.com MODERN GEOSCIENCES TRUSTED ENVIRONMENTAL ADVISORS PHOTOGRAPHIC DOCUMENTATION PROJECT 21125 www.MODERNGEOSCIENCES.com PHOTOGRAPHIC DOCUMENTATION MODERN GEOSCIENCES TRUSTED ENVIRONMENTAL ADVISORS 46 No. 1 View of wells. No. 2 Additional view of wells. tt I � No. 3 View of separators. No.4 View of ASTs. 1 - P F ymrt E'ry;4 No. 5 View of Separator F. No. 6 View of Compressor A. PROJECT 21125 www.MODERNGEOSCIENCES.com Affl v MODERN GEOSCIENCES TRUSTED ENVIRONMENTAL ADVISORS RRC DOCUMENTATION PROJECT 21125 www.MODERNGEOSCIENCES.com RAILROAD COMMISSION OF TEXAS OIL&GAS DIVISION c�1 E UF�•� NOTICE OPERATOR: Endeavor Energy Resources L.P. LEASE: Acme Unit RRC ID NUMBER: 240100 COUNTY: Denton DATE &TIME OF INSPECTION: March 26, 2018 INSPECTION OF THIS LEASE REVEALED THE FOLLOWING VIOLATIONS RULE 3 NORM must be identified as per SWR 3.3 and 4.605. Some NORM equipment is identified on lease, however, Denton City Gas Inspector, Mr. Weatherby, states not all is identified. Identify NORM at entrance RULE of lease. RULE RULE RULE RULE RULE Action necessary to correct these violations is requested prior to the reinspection scheduled for May 12, 2018 This informal notification is begin given to facilitate the correction of the noted violations without formal correspondence to your office. Your assistance in resolving these violations at this level will be appreciated. Failure to correct these violations will result in additional commission action. SIGNED: Kiva Harris TITLE: Geologist PHONE NUMBER 940-723-2153 (office) RAILROAD COMMISSION OF TEXAS OIL&GAS DIVISION NOTICE OPERATOR: Endeavor Energy Resources L.P. LEASE: Acme Unit RRC ID NUMBER: 240099 COUNTY: Denton DATE &TIME OF INSPECTION: March 26, 2018 INSPECTION OF THIS LEASE REVEALED THE FOLLOWING VIOLATIONS: RULE 3 NORM must be identified as per SWR 3.3 and 4.605. Some NORM equipment is identified on lease, however, Denton City Gas Inspector, Mr. Weatherby, states not all is identified. Identify NORM at entrance RULE of lease. RULE RULE RULE RULE RULE Action necessary to correct these violations is requested prior to the reinspection scheduled for May 12, 2018 This informal notification is begin given to facilitate the correction of the noted violations without formal correspondence to your office. Your assistance in resolving these violations at this level will be appreciated. Failure to correct these violations will result in additional commission action. SIGNED Kiva Harris TITLE: Geologist PHONE NUMBER: 940-723-2153 (office) RAILROAD COMMISSION OF TEXAS OIL&GAS DIVISION �1 L 11�>• NOTICE OPERATOR: Endeavor Energy Resources L.P. LEASE: Acme Unit RRC ID NUMBER: 233137 COUNTY: Denton DATE&TIME OF INSPECTION: March 26, 2018 INSPECTION OF THIS LEASE REVEALED THE FOLLOWING VIOLATIONS RULE 3 As per SWR 3 and 4.605 NORM on a lease must be identified. Some NORM equipment is identified, however, Denton City Gas Inspector, Mr.Weatherby, states not all is identified. Identify NORM at entrance RULE of lease. RULE RULE RULE RULE RULE Action necessary to correct these violations is requested prior to the reinspection scheduled for May 12, 2018 This informal notification is begin given to facilitate the correction of the noted violations without formal correspondence to your office. Your assistance in resolving these violations at this level will be appreciated. Failure to correct these violations will result in additional commission action. SIGNED: Kiva Harris TITLE Geologist PHONE NUMBER: 940-723-2153 (office) RAILROAD COMMISSION OF TEXAS OIL&GAS DIVISION NOTICE OPERATOR: Endeavor Energy Resources L.P. LEASE: Acme Unit RRC ID NUMBER: 239836 COUNTY: Denton DATE &TIME OF INSPECTION: March 26, 2018 INSPECTION OF THIS LEASE REVEALED THE FOLLOWING VIOLATIONS: RULE 3 As per SWR 3 and 4.605 NORM on a lease must be identified. Some NORM equipment is identified, however, Denton City Gas Inspector, Mr. Weatherby, states not all is identified. Identify NORM at entrance RULE of lease. RULE RULE RULE RULE RULE Action necessary to correct these violations is requested prior to the reinspection scheduled for May 12, 2018 This informal notification is begin given to facilitate the correction of the noted violations without formal correspondence to your office. Your assistance in resolving these violations at this level will be appreciated. Failure to correct these violations will result in additional commission action. SIGNED: Kiva Harris TITLE: Geologist PHONE NUMBER: 940-723-2153 (office) MODERN GEOSCIENCES TRUSTED ENVIRONMENTAL ADVISORS FIGURE PROJECT 21125 www.MODERNGEOSCIENCES.com Aerial Source:Microsoft Corporation©and its data suppliers Parcel:Denton County Appraisal District Endeavor __ Padsite Location Well ID RRC ID A 233137 .G B 239836 C 240089 N D 2401C_ _ Dent a S V - ■ ■ � ® � r B Basemap Source'.ESRI Small Tank Piping I J K Storage , ■ . M Legend: Area }� .F A Well - - - - - - A� Separator O� . . . � . . . . . . . . AST OCompressor Ancillary Equipment ti �• ® Foam Lines Piping ® Upwind Air Sampling Point A B C D B C D �, Storage E F G H E Area m Downwind Air Sampling Point ® 0 Sound Sampling Point v, C r — Fenceline Screening Alignment Wind Direction(to) h; Observation Path Padsite a A F Denton County Parcels PROJECT NO. 21125 FIGURE o so 100 1so soo Feet DRAWN: 07.28.21 PADSITE MAP � � CS/LG This figure was prepared using data from a variety of sources. DRAWN ' No warranty is made as to the accuracy or completeness of data CHECKED BY: KT provided through third parties. All data contained herein is ACME Padsite(No. 140) subject to change without notice.This figure is not intended for use as a MODERN G E O S C I E N C E S FILE NAME: 1692 E Ryan Road legal survey or construction design document. If denoted, wind Denton,Texas direction represents dominant wind direction observed during field activities. TRUSTED ENVIRONMENTAL ADVISORS° 140_H_End_A_Padsile_210728.mxd