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�) it <br /> � ' U <br /> PUBLIC HEALTH SERVICES ,oA� N <br /> SAN JOAQUIN COUNTY Q rte , a <br /> • ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M D , M P H , Health Officer <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 ``F0Vt <br /> 209/468-3420 <br /> PAUL SUPPLE <br /> ARCO PRODUCTS COMPANY <br /> P O BOX 6549 <br /> MORAGA CA 95470 <br /> RE ARCO Station#4932 Site Code # 1136 <br /> 16 E Harding Way <br /> Stoclaon CA 95204 <br /> WORKPLAN Work Plan for Additional Site Assessment <br /> DATED, January 5,2001 <br /> PREPARED BY SECOR International Incorporated <br /> APPROVED <br /> MZSVED EDED SubmitADL)hNL)UM NEb <br /> ADE UATE AND NECESSARY ELEMENTS OF THE WORK PLAN[H&S 25299 37,subd(c)(3)] <br /> 1 Advancement of two soil borings to 80 feet bsg The bonngs wall be continuously logged from 20 feet to total depth <br /> Depth discrete soil and groundwater samples will be collected at 40,60,and 80 feet bsg by Simulprobe Samples will <br /> be analyzed for TPHg(EPA Method 8015m),BTEX(EPA Method 8020) and oxygenates,1,2-DCA and EDB (EPA <br /> Method 8260) <br /> 2 Installation of five groundwater monitoring wells to first water for investigation of the lateral extent of the shallow <br /> sod and groundwater contamination Sol samples will be collected every five feet,selected samples will be analyzed <br /> for the above listed constituents <br /> 3 Following development of the new wells,groundwater will be collected and analyzed for the above listed constituents <br /> 4 A 500-foot radius door-to-door sensitive receptor survey and a conduit survey will be conducted <br /> 5 All necessary encroachment permits,access agreements and San Joaquin County Well permits will be obtained <br /> COMMENTS AND CONDITIONS <br /> 1 Installation of deep,discretely screened monitoring wells will follow evaluation of data received from the 80-foot <br /> soil borings <br /> 2 Forty eight hours notification to PHS/EHD is required prior to autiating fieldwork <br /> DATED l i► 11 6 l BY Lcry-- C( (�k + c u '- <br /> Lon Duncan,Senor RENS (209)468-0337 <br /> cc MartyHaruell,CVRWQCB <br /> Rusty Benkosky,SECOR <br /> A Division of San Joaquin County Health Care Services U <br /> JAN 12 2001 <br />