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2022.08.05_MGS_2022 - First Half MODERN GEOSCIENCES TRUSTED ENVIRONMENTAL ADVISORS DATE May 31, 2022 PROJECT 22075 Post-Production Inspection Re.. Padsite No. 107(Bonnie Brae) ATTN City of Denton Operator: EagleRidge 215 East McKinney Street Location: ® City of Denton ❑ Denton ETJ Denton,Texas 76201 Former Priority: ❑ High ® Moderate ❑ Low Modern Geosciences, LLC(Modern) is pleased to provide the attached Post-Production Inspection Report documenting the results of our recent inspection and monitoring events at the above-referenced padsite. At the direction of the City,we modify the inspection process for the final inspection effort to collect data that reflects current site conditions as the padsite is closed or being closed out. A general summary of findings is presented below with additional 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. ■ Surface Inspection: Modern prepared a 10' by 10' grid of all areas of the padsite historically associated with production infrastructure to allow surface screening for potential concerns. At a minimum, the grids extended —10 feet beyond prior infrastructure including the gas well and former locations of aboveground storage tanks (ASTs) and other equipment. Screening included an evaluation of background at least 250 feet away from the nearest padsite boundary and/or above grade equipment with survey equipment and at least one inspection point per grid for visual evidence of releases, methane, volatile organic compounds (VOCs), and radiation.The surface inspection area is depicted on Figure 1. o Visual Evidence of Releases: Modern evaluated each grid to determine if visible evidence of a release or odors were present. This included dark staining, sheens, or other observations suggestive of remnant impact on the padsite. No visual evidence of releases was identified during the inspection. o Methane: Modern utilized calibrated equipment capable of detecting methane to 1 ppmv to screen each grid within 2" or less above the surface to identify if methane was noted above 10 ppmv or 2x background. No methane observations exceeding 10 ppmv were identified during the inspection. 5100 THOMPSON TERRACE,COLLEYVILLE,TEXAS 76034 1 F 682.223.1593 1 P 682.223.1322 www.MODERNGEOSCIENCES.com MODERN GEOSCIENCES TRUSTED ENVIRONMENTAL ADVISORS o Volatile Organic Compounds (VOCs): Modern utilized a Photoionization Detector (PID) capable of detecting total VOCs (tVOCs) to 1 ppbv to screen each grid within 2" or less above the surface to identify if tVOCs were noted above 100 ppbv (0.1 ppmv) or 10x background. No tVOCs observations exceeding 10 ppbv were identified during the inspection. o Radiation:Modern utilized a radiation meter consistent with 16 TAC§4.605(d)and 25 TAC §289.259(e)to screen each grid immediately above the existing surface (no more than 2" above)to identify if radiation was noted more than 20 µR/hr or 2x background and further evaluated to determine if buried Naturally Occurring Radioactive Material (NORM; Technologically Enhanced) -containing equipment was present. No radiation observations exceeding 20 µR/hr were identified during the inspection. ■ Site-Wide Subgrade Leak Evaluation: Since the Padsite previously included subsurface piping and/or related gathering lines at the padsite or up to 250 feet away from the padsite boundary, screening with an optical gas imaging(OGI)camera was performed across the padsite and at least 250 feet from all areas where subgrade piping is suspected and/or known to visualize and pinpoint potential subgrade leaks. No OGI visual evidence of subgrade leaks was identified during the inspection. ■ 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 status,this padsite is not scheduled to be inspected again by Modern. 5100 THOMPSON TERRACE,COLLEYVILLE,TEXAS 76034 1 F 682.223.1593 1 P 682.223.1322 www.MODERNGEOSCIENCES.com 4(--!Sl MODERN GEOSCIENCES TRUSTED ENVIRONMENTAL ADVISORS 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. ReAnneth y submitte , 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 1 F 682.223.1593 1 P 682.223.1322 www.MODERNGEOSCIENCES.com <S MODERN GEOSCIENCES TRUSTED ENVIRONMENTAL ADVISORS DATE May 31, 2022 PROJECT 22075 POST-PRODUCTION INSPECTION REPORT Padsite No. 107—Bonnie Brae PREPARED FOR City of Denton 215 East McKinney Street Denton,Texas 76201 PREPARED BY REVIEWED BY Zacha on rr , GIT e eth S.kramm, PhD, PG,` HMM PROJECT MANAGER SENIOR PROGRAM MANAGER 5100 THOMPSON TERRACE,COLLEYVILLE,TEXAS 76034 1 E 682.223.1593 v 682.223.1322 ©2022 MODERN GEOSCIENCES.ALL RIGHTS RESERVED. www.MODERNGEOSCIENCES.com PADSITE INSPECTION REPORT Padsite Name:Bonnie Brae (#107) Operator: EagleRidge Inspection Date:04105122 Inspectors:ZT, SB 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: Not applicable Item 2: Appropriate signage present at padsite entrance and/or equipment including ❑ ❑ ® RRC/API numbers. Comments: Not applicable ❑ ❑ ® Item 3: Fencing present surrounding padsite and/or equipment. Comments: Not applicable ❑ ❑ ❑ Item 4: Site secured. Gates locked to control unauthorized access. Comments: Not applicable ® ❑ ❑ 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: Not applicable ® ❑ ❑ 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 ❑ ❑ ❑ 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: Not applicable ❑ ❑ ® Item 14: Remote compressed air foam line (fire suppression) present. Comments: Not applicable ❑ ❑ ® Item 15:Access road accommodates 20' wide emergency vehicle requirements. Comments: Not applicable Item 16: Water/oil transfer points within secondary containment or have drip control ❑ ❑ ® accessory to minimize spillage during waste transfer. Comments: Not applicable ❑ ❑ ❑ Item 17:Tank battery has appropriate hazardous material signage. Comments: Not applicable ❑ ❑ ❑ 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: None PROJECT 22075 1 MAY 31,20221 PAGE 1 www.MODERNGEOSCIENCES.com PADSITE INSPECTION REPORT Padsite Name:Bonnie Brae (#107) Operator: EagleRidge Inspection Date:04105122 Inspectors:ZT, SB MODERN G E O S C I E N C E S TRUSTED ENVIRONMENTAL ADVISORS NEAR EQUIPMENT INSPECTION RESULTS: 4SPECTION RESULTS - WELL Location ID: Leaks (OGI): NORM (�tR/hr; max): Date Reported': Date Addressed 2 Former Well A NA— Plugged (Markers NA NA NA Present) Former Well B NA— Plugged (Markers NA NA NA Present) 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 INSPECTION RESULTS — SEP, Location ID: Leaks (OGI): NORM (ltR/hr; max): Date Reported': Date Addressed 2 Former Separator A NA- Removed NA NA NA Former Separator B NA- Removed NA NA NA Former Separator C NA- Removed NA NA NA General Notes: 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 (ltR/hr; max): Date Reported': Date Addressed': Former AST A NA- Removed NA NA NA AST B None <15 NA NA AST C None <15 NA NA Former AST D NA- Removed NA NA NA General Notes: ASTS B and C were moved from the former secondary containment area prior to Modern's inspection. Please see Figure 1 for a depiction of both the prior operational footprint and location where the ASTS were staged during our inspection. Based on discussions with the Operator, the ASTS were staged pending removal from the Site. No other concerns noted. 1—Reported to operator,•z—If reported to Modern by operator/City; *NORM exceeding 50 µR/hr not labeled cauL 1 J — �,vrvirRESbvmo um ANCILLARY Location ID: Leaks (OGI): NORM (ItRffir; max): � Date Reported': Date Addressed': Former Compressor A NA- Removed NA NA NA Ancillary A None <15 NA NA Former Ancillary B NA- Removed NA NA NA General Notes: No other concerns noted. 1—Reported to operator,•z—If reported to Modern by operator/City; *NORM exceeding 50 µR/hr not labeled PROJECT 22075 1 MAY 31,20221 PAGE 2 www.MODERNGEOSCIENCES.com MODERN GEOSCIENCES TRUSTED ENVIRONMENTAL ADVISORS PHOTOGRAPHIC DOCUMENTATION PROJECT 22075 www.MODERNGEOSCIENCES.com v PHOTOGRAPHIC DOCUMENTATION MODERN GEOSCIENCES TRUSTED ENVIRONMENTAL ADVISORS C: No. 1 View of well marker locations. No. 2 View of ASTs. r No. 3 View of Ancillary A. No.4 View of across padsite. PROJECT 22075 www.MODERNGEOSCIENCES.com MODERN GEOSCIENCES TRUSTED ENVIRONMENTAL ADVISORS FIGURES PROJECT 22075 www.MODERNGEOSCIENCES.com Aerial Source:Microsoft Corporation©and its data suppliers Parcels:Denton CountyAppraisal District Eagle Ridge Padsite Location Well ID RRC ID +---- ----j- A 191993 B 276941 0 Denton El B.—ap Source'.ESRI { t B Legend: Q Former Well(Plugged&Abandoned) A A Former Separator OFormer AST t Temporary Staging of AST at Time of Inspection OFormer Compressor C g , = Ancillary Equipment D C 0 Former Ancillary Equipment B - A A 0 Foam Lines B A C Wind Direction(to) No Screening Criteria Exceeded EDPadsite PROJECT NO. 22075 FIGURE 0 50 100 15Feet DRAWN: 06.29.22 PADSITE MAP DRAWN BY: CS/LM/LG This figure was prepared using data from a variety of sources. No warranty is made as to the accuracy or completeness of data CHECKED BY: KT provided through third parties. All data contained herein is Bonnie Brae Padsite(No. 107) 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: 3696 Bonnie Brae legal survey or construction design document. If denoted, wind Denton,Texas direction represents dominant wind direction observed during field activities. TRUSTED ENVIRONMENTAL ADVISORS® 107_M_ER_BB_Padsite_220725.mxd