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Technical Memorandum <br /> Review of Work Plan for Additional Investigation <br /> 2546 French Camp Turnpike,Stockton,CA 95206 <br /> Page 3 of 3 <br /> CONDOR COMMENTS <br /> Based on a review of the Work Plan, Condor concurs that the proposed additional investigation appears <br /> adequate to evaluate potential off-site VEC to nearby sensitive receptors given the following conditions are <br /> addressed during the investigation: <br /> - Due to the detection of multiple volatile organic compounds (VOCs) in the soil vapor samples <br /> collected to date, future collected soil, soil gas, and air samples should be analyzed for full scan <br /> VOCs including naphthalene. <br /> - Collected soil and groundwater samples should be analyzed for full scan VOCs as well as total <br /> petroleum hydrocarbons—Fuel fingerprint(gasoline,diesel,oil range hydrocarbons). <br /> Please ensure that the selected analytical laboratory maintains the appropriate accreditation for the proposed <br /> analyses to prevent potential delays or resampling requests due to data reliability concerns.Coordinate with <br /> EHD to obtain the necessary drilling permits prior to initiating field activities. Following completion of <br /> sampling activities, ensure that all temporary soil vapor wells are destroyed pursuant to EHD's Well <br /> Standards (San Joaquin County Ordinance Code Section 9-1115.6). Upon receipt of analytical results, <br /> submit a revised Site Characterization and Closure Report incorporating the updated risk evaluation. <br /> Respectfully, <br /> CONDOR EARTH S\oNA1 GFO` <br /> Q P <br /> dLUKE 1a <br /> -4 If No.9945 No.GM <br /> Q <br /> 9T�0F CAI,\FOP�\ <br /> Luke Castle,PG No. 9945 January 15,2026 John P. Lane,PG No. 6795 January 15, 2026 <br /> Associate Geologist Environmental Services Manager <br /> https://condorearth.sharepoint.com/sites/Project/Shared Documents/8000_prj/8845 SJCEHD Geologist Support/8845 Site Mitigation <br /> Support/SR0086563 2546 French Camp/20260106 Work Plan Additional/L 20260115 Blew Work Plan 2026.docx <br /> �ia CONDOR <br />