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k`■ KLEINFELDER <br /> File No. 20-2245-32.E01 <br /> November 18, 1997 <br /> Mr. Randy Bling <br /> DSS Engineering, Inc. <br /> P.O. Box 6099 <br /> Stockton, California 95206 <br /> Subject: Soil Excavation Observation, Sampling, and Analyses <br /> Aboveground Diesel Storage Tank Location <br /> Larkspur Estates (Parcel #6) <br /> Tracy, California <br /> Dear Mr. Bling, <br /> In accordance with your request and authorization, Kleinfelder has conducted soil excavation <br /> observation, sampling and analyses at the above-referenced site. The work was performed in <br /> accordance with our proposal 20-YP7-208, dated November 6, 1997. <br /> 1.0 SITE SETTING AND USE <br /> The proposed Larkspur Estates Property is located at 2025 MacArthur Drive in Tracy, California. <br /> The site is located in an agricultural, residential and commercial area of Tracy. A farmhouse and <br /> associated structures had recently been removed [including the above ground storage tank <br /> (AGST)] prior to Kleinfelder's field activities. Weeds and tall grasses over the remaining site <br /> were being stripped during soil excavation observation. <br /> ' 2.0 BACKGROUND <br /> ' Kleinfelder was informed by DSS that an above-ground diesel storage tank (AGST) was at the <br /> above-referenced address. A Phase I Environmental Site Assessment was conducted in early <br /> September 1997, by Michael E. Gingrass, in which several areas of"stained and odorous" soil <br /> were indicated in the vicinity of the above-ground storage tank. A composite soil sample was <br /> collected September 9, 1997 by Mr. Gingrass, from three distinct areas surrounding the tank to a <br /> depth of two to three feet below surface grade. Results of the analysis indicated diesel fuel soil <br /> contamination of 57,000 mg/kg (ppm). However, the sampling conducted did not define the <br /> 20-2245-32.E01/2017R720 Page I of 5 <br /> © 1997, Kleinfelder,Inc. November 18, 1997 <br />