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CaliforniWegional Water Quality Cc#-ol Board . <br /> Central Valley Region <br /> Katherine Hart, Chair <br /> 11020 Sun Center Drive,11200,Rancho Cordova,California 95670-6114 <br /> Matthew Rodriquez (916)464-3291 •FAX(916)464-464 �E Edmund G.Brown Jr. <br /> Secretmyfor http://www.waterboards.ca.gov/centmlval y EGA Governor <br /> Environmental Protection <br /> OCT 24 2011 <br /> James Ritchie and Greg McIver �. <br /> 11Ft(JNtc�_N aLNEA1 0 October 2011 <br /> The Source Group, Inc. PEfAMlVSES'J10E5 <br /> 751 Laurel Street, Suite 722 <br /> San Carlos, CA 94070 <br /> DOCUMENT REVIEW FOR EAR ACCOUNT CASE#R10-129, FORMER COUNTRYSIDE MARKET, <br /> 10848 COPPEROPOLIS ROAD, STOCKTON, SAN JOAQUIN COUNT (RB #390783) <br /> 1 reviewed the Site Investigation Work Plan (Workplan), received as an email attachment on <br /> 19 October 2011 from The Source Group, Inc. (TSGI). The Workplan proposes the following tasks: <br /> • Conduct fieldwork for the investigation of soil and groundwater, incluc ing installation of five (5) <br /> 2-inch diameter onsite monitoring wells with 20' screens (MW-1 through MW-5) in borings <br /> advanced to 100' below ground surface bgs (if first water depth is approximately 90' bgs). Total <br /> depth may be adjusted per agreement of the TGSI geologist or engineer and Regional Board staff; <br /> • Conduct a sensitive receptor survey (door to door search, and record 3 of Department of Water <br /> Resources, this Regional Board, and Environmental Data Resources to locate and attempt to <br /> sample all domestic wells identified onsite and within 500' of the Site;! <br /> • Conduct four quarters of quarterly groundwater monitoring, including (nearby domestic wells with <br /> access, using USEPA Method 8260B for total petroleum hydrocarbons as gasoline, benzene, <br /> toluene, ethylbenzene, xylenes, methyl tert butyl ether, tertiary butyl lcohol, di-isopropyl ether, <br /> ethyl tert butyl ether, tert amyl methyl ether, ethylene dibromide and 1, 2- dichloroethane; and <br /> • Submit a site investigation report with recommendations within 4 weeks of receipt of analytical data. <br /> The Workplan was written in compliance with tasks in the Cost Estimate approved by my letter dated <br /> 14 July 2011, and is necessary and appropriate to investigate the release of petroleum hydrocarbons, <br /> and to assess human health risk to nearby domestic wells. The Workplan is approved. Please provide <br /> the San Joaquin County Environmental Health Department and myself at least 3 working days' notice <br /> prior to initiation of fieldwork, and contact me by phone at (916) 464-4614 or by email at <br /> ibarton(a)waterboards.ca.00v if you have questions or comments. <br /> /in <br /> �/JamesBartEngineerg Geologist <br /> UST Enforcement Unit II <br /> cc: Pearl Cross, State Water Resources Control Board, UST CleanupFund <br /> Conrad Lewis, DGS, Real Estate Division, 707 3rd St., West Sacrmento 95605 <br /> San Joaquin County Environmental Health Department, Stockton <br /> California Environmental Protection Agency <br /> Qr1 Recycled Paper <br />