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RAMAGE <br /> ENVIRONMENTAL Sacramento Office <br /> Post Office Box 869 <br /> Rancho Murieta, CA 95683 <br /> Tel (916) 354-3250 <br /> Fax (916) 354-1786 <br /> April 24, 2000 <br /> ENVIRONMENTAL HEALTH DIVISION <br /> 304 E. Weber Ave.Third Floor <br /> P. O. Box 388, Stockton CA 95201-0388 <br /> Approved <br /> Denied r n <br /> Mr. Harlin Knoll, Sr. R.E.H.S. � onditions <br /> San Joaquin County PHS/EHD f <br /> 304 East Weber Avenue, 3`d Floor I Date by <br /> Stockton, CA 95201-0388 <br /> Re: Letter Work Plan, CPT Confirmation Soil and Groundwater Sampling <br /> San Joaquin Catholic Cemetery, Stockton, California <br /> USTCF Claim 41092 <br /> Dear Mr. Knoll: <br /> On behalf of the San Joaquin Catholic Cemetery, Ramage Environmental is pleased to <br /> provide the San Joaquin County Public Health Services Environmental Health Division <br /> (PHS/EHD) with this letter work plan outlining the proposed soil and groundwater sampling <br /> and analysis tasks for the above-referenced project. This work plan was requested by <br /> PHS/EHD in their directive, dated January 27, 2000. <br /> Project Objectives <br /> The objectives of the proposed sampling and analysis are to confirm the cleanup of vadose <br /> zone soil currently being remediated by soil vapor extraction and to evaluate the vertical <br /> extent of impacted groundwater-bearing zones beneath the former underground storage tanks <br /> (UST). To achieve these objectives, a cone penetrometer test (CPT)rig will be used to <br /> collect multiple soil and groundwater samples from one location in the vicinity of the former <br /> USTs. The location of the proposed sampling location is shown on the attached Figure 1. <br /> Relevant Previous Work <br /> On November 17, 1989, one 500-gallon gasoline UST and one 1,000-gallon gasoline UST <br /> were removed from the site in response to a failed tank tightness test. According to the <br /> inspector's report, a hole approximately 5-inches in diameter and numerous pin-sized holes <br /> were observed in the tank bottom. Three soil samples collected from beneath the former <br /> USTs contained up to 4,200 milligrams per kilogram(mg/kg) of Total Petroleum <br /> Hydrocarbons (TPH)-as-Gasoline and 21 mg/kg of benzene. These analytical results are <br /> summarized in the attached Table 1. <br />