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� r <br /> PUBLIC HEALTH SERVICESQ�a <br /> ' SAN ]OAQUIN COUNTY Q <br /> ENVIRONMENTAL HEALTH DIVISION --- <br /> ' Karen Furst, M.D., M P.H , Health Officer 9- <br /> 304 <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 R`'Fo9�' <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 /> Stockton CA 95204 <br /> I <br /> WORK PLAN Work Plan for Additional Site Assessment <br /> DATED January 5,2001 <br /> PREPARED BY SECOR International Incorporated <br /> ' APPROVEDDISAPPROVEx <br /> DADDENDURENEEDED Subrrut by <br /> 1• <br /> ADE ATE AND NECESSARY ELEMENTS QF THE WORK PIAN[H&S 25299 37,subd(c)(3)) <br /> ' 1 Advancement of two sort bonngs to 80 feet bsg The borings will be continuously logged from 20 feet to total depth <br /> Depth discrete sort and groundwater samples will be collected at 40,60,and 80 feet bsg bySirnulprobe Samples will <br /> be analyzed for'IPF%(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 /> sort and groundwater contamination Sod samples will be collected every five feet,selected samples will be analyzed <br /> for the above luted constituents <br /> ' 3 Following development of the new wells,groundwater wiM 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 perrruts,access agreements and San Joaquin County Well perrrms will be obtained <br /> ' CCQMIyIENT3 AND CONDITIONS <br /> ' 1 Installation of deep,discretely screened monitoring wells wM 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 uutiatnng fieldwork <br /> DATED f 0 BY c �. <br /> ori Duncan.Senior REHS (209)„468-0337 <br /> • cc Marry Hartzell,CVRWQCB <br /> I ' RustyBenkosky,SEOOR <br /> A Division of San' Joaquin County Health Care Services JAN 12 2001 4 <br /> R li <br />