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enviroso <br /> April 2, 1996 R E C E „'' ' <br /> San Joaquin County Public Health Services APR 0 31996 <br /> Environmental Health Division ENVIROtNMLzir (AL <br /> Site Mitigation Unit PERMIT/ SERVIC{_.._ <br /> Attn: Ms. Margaret Lagorio <br /> P.O. Box 388 <br /> Stockton, California 95201 <br /> RE: Tank Removal and Over-excavation Work Plan <br /> Shell Service Station <br /> 2494 E. Fremont Street <br /> Stockton, California <br /> WIC 204-7524-1808 <br /> Dear Ms. Lagorio: <br /> ' Enviros, Inc. (Enviros)has prepared this Work Plan describing activities to be performed <br /> during the removal and replacement of underground storage tanks (USTs) at the above <br /> referenced location (Plates 1 and 2). Environmental work will be performed to comply <br /> with appropriate Regional Water Quality Control Board and San Joaquin County <br /> Environmental Health Division (SJCEHD) guidelines. <br /> Executive Summary <br /> • The removal of four(4) gasoline USTs and associated piping is scheduled to <br /> begin on April 22, 1996. <br /> • The old tanks will be replaced by two new gasoline USTs and associated piping. <br /> • Soil samples from the UST excavation and trenches will be analyzed for TPH-G, <br /> BTEX,Total Lead and MTBE. <br /> • If ground water is encountered in the tank pit during excavation activities, a <br /> ground water sample will be collected and analyzed for TPH-G, BTEX,Total <br /> Lead and MTBE. <br /> • If over-excavation of soils is necessary, an Enviros geologist will direct the <br /> excavation contractor. Soils will be screened by visual observation and using an <br /> organic vapor meter. Confirmation soil samples will be collected and analyzed <br /> for TPH-G, BTEX, Total Lead and MTBE. <br /> • Excavated soils will be stockpiled on-site. One composite soil sample for every <br /> 100 cubic yards of stockpiled soils will be collected and analyzed for <br /> characterization and disposal at an appropriate facility. <br /> • A Tank Removal Report will be submitted to SJCEHD. <br /> Enviros, Inc. 270 Perkin$Street Sonoma, Caldornia Tel 707/935-4850 <br /> P.O.Box 259 95476-0259 Fax 707/935-6649 <br />