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PUBLIC HAALTH SERVI(:S <br /> oPqU�Nc <br /> SAN JOAQUIN COUNTY �` 0 <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 o P <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 /> WORK PLAN: Work Plan for Additional Site Assessment <br /> DATED: January 5,2001 <br /> PREPARED BY: SECOR International Incorporated <br /> APPROVED: x <br /> MDEDED- Submit by <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORK PLAy[H&S 25299.37,subd(c)(3)]: <br /> 1. Advancement of two soil borings to 80 feet bsg. The borings will 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 bySimulprobe. 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 /> soil and groundwater contamination. Soil 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 initiating fieldwork <br /> DATED 111 01 BY <br /> Lori Duncan,Senior UHS 209)468-0337 <br /> CC: Many Hartzell,CVRWQCB <br /> RusryBenkosky,SECOR AM 3 111 <br /> A Division of San Joaquin County Health Care Services - <br />