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BP #172 (Thrifty) - 2 - 23 May 2017 <br /> 7647 Pacific Avenue <br /> Stockton, San Joaquin County <br /> 2. Please collect the background metals sample from the well bores from approximately the <br /> same depth as the submitted sample collected from the waste oil tank boring. <br /> 3. Please wait to develop the monitoring wells a minimum of 72 hours after they are <br /> installed to allow proper curing of the well seals. <br /> 4. By 25 August 2017, please submit a Site Assessment Report detailing the well <br /> installation and boring activities, and the associated findings. Please include a geologic <br /> cross section that shows on-Site wells, off-site well MW-23, and the newly installed <br /> wells, <br /> 5. Please incorporate the newly installed wells into the semi-annual sampling program, and <br /> collect groundwater samples during the fourth quarter 2017 sampling event. Please <br /> submit the corresponding Groundwater Monitoring Report by 30 January 2018. <br /> If you have any questions or concerns regarding comments in this letter please contact the <br /> undersigned at (916) 464-4615 or by email at aIan.buehier@waterboards.ca.gov. <br /> 01 E' oNq�c <br /> q�qN <br /> Alan M. Buehler, P.G. • <br /> 0 <br /> M. 6 O <br /> Nq 40Fy4 <br /> Engineering Geologist A 9 FR65 <br /> y <br /> • <br /> cgLIFORN�P <br /> cc: Sriram lyer, State Water Resources Control Board, Cleanup Fund, Sacramento <br /> Michael Keith, San Joaquin County Environmental Health Department, Stockton <br /> Jeanne Homsey, ATC, Modesto 95351 <br />