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1R $ <br /> i <br /> Working to Restore Nature <br /> 1710 Main Street <br /> Escalon,.CA 95320 <br /> Phone:(209)838-3507 <br /> FAX: (209)838-3509 <br /> December 18, 1992 <br /> Margaret Lagorio <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P.O. Box 2009 <br /> Stockton, CA 95201 <br /> RE: Healy Property, 9172 Thornton Road, Stockton, California <br /> Dear Ms. Lagorio: <br /> As you discussed in a meeting with Russell Juncal last month, RESNA Industries, Inc. (RESNA) <br /> is writing to present a brief workscope to assess passible petroleum hydrocarbon contamination <br /> in the former underground storage tank area at the above referenced site. <br /> RESNA plansto supervise the installation of one soil boring in the former tank location. The <br /> boring will be drilled to 35 feet total depth. Samples will be collected at five foot intervals from <br /> 10 feet to 35 feet, with a California modified split spoon sampler. The samples, will be <br /> submitted to RESNA Analytical Laboratory in Fremont, California;(State certificate no. 1210). <br /> Samples will be analyzed for benzene, toluene, ethylbenzene, xylenes (BTEX), and total <br /> petroleum hydrocarbons as gasoline (TPHG) by EPA methods 8020 and 8015, respectively. A <br /> total of six soil samples will be collected for analysis. Soils will be logged for soil lithology by <br /> a field geologist, and all site activities will be conducted in accordance with RESNA's Quality <br /> Assurance/Quality Control (QA/QC)Plan (Attachment 1)and will follow the Site Specific Health <br /> and Safety Plan (Attachment 2). <br /> Subsequent to laboratory analysis RESNA will submit a letter report summarizing site activities <br /> and analytical results. A recommendation for further site assessment or site closure, as <br /> appropriate, will be submitted at this time. <br /> As was also discussed, verification of the removal of all existing tanks and piping will, be <br /> discussed in the summary report. <br /> Ir121692.FNL <br />