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• pry .r , ��/ <br /> ENGINEERING INC. <br /> RCE #27011 LIC. #537901 <br /> March 22, 1989 <br /> Mr. Dave Atwater <br /> California Fuels <br /> P.O. Box 1207 <br /> Stockton, CA 95201 <br /> RE: SITE INVESTIGATION/RWWDIATION PROPOSAL <br /> 838 EAST MORELUNNE STREET, WOODBRIDGE, CA <br /> Dear Mr. Atwater: <br /> This letter is in response to the Federated Insurance letter dated <br /> March 1 , 1989, requesting a proposal for our firm to complete the <br /> additional site investigation and remediation work at the subject <br /> property as outlined in the Soil Gas Investigation Report prepared by <br /> our firm dated February 23 , 1989, and amended by the Central Valley <br /> Regional Water Quality Control Board (CVRWQCB) letter dated March 17 , <br /> 1989 (attached) . We have reviewed the conditions of the CVRWQCB <br /> letter, and by copy of this letter make it a part of the proposed <br /> workplan. <br /> Proposed Work <br /> After reviewing the data in the report and discussing the project <br /> with the CVRWQCB, we concur that both soil remediation and <br /> groundwater investigation will be necessary to adequately <br /> characterize the site. It is proposed to excavate and aerate onsite <br /> approximately 225 cubic yards of contaminated soil , and to install a <br /> 4-inch groundwater monitoring well as shown on the attached figure. <br /> It is proposed to excavate an area approximately 20 feet by 20 feet <br /> to groundwater or a total depth of 15 feet in the vicinity of the old <br /> pump house and the fuel dispensers as shown on the attached figure. <br /> Six (6) soil samples, one from each sidewall and two from the bottom, <br /> will be collected from within the excavation to verify that all the <br /> impacted soil has been removed from the excavation. The soil <br /> contamination will also be monitored in the field to determine the <br /> extent of the excavation and which soil samples will be verified by a <br /> state certified laboratory. <br /> The contaminated soil will be stockpiled onsite. Two ( 2) soil <br /> samples will be collected from the spoils pile to profile the soil . <br /> The soil samples will be analyzed by a state certified laboratory for <br /> Total Petroleum Hydrocarbons (TPH; GC-FID) in the gasoline and diesel <br /> range. The soil samples will also be analyzed for Benzene, Toluene, <br /> Ethyl Benzene, and Xylene (BTEX; Method 8020) . <br /> 8084 Old Auburn Blvd., Suite E Citrus Heights,CA 95610 (916)723-7645 <br />