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' Job No 4780201 <br /> ' 2.0 SITE LOCATION AND DESCRIPTION <br /> ' The subject site is located at 820 South American Street in Stockton, California <br /> (see Figure 1 ), and is identified as Assessor's Parcel Numbers 147-292-9, 10, <br /> ' and 11 . The subject site is located in an area zoned for Commercial, Industrial, <br /> and Residential uses, and is currently occupied by three buildings and a yard <br /> ' area. <br /> ' 2.1 Site Background <br /> 1 Prior to 1992, the subject site was occupied by Seibold Corporation. Three fuel <br /> ' Underground Storage Tanks (USTs), used by Seibold and containing gasoline <br /> and diesel, were reportedly removed from the site in 1989 and 1990. Based on <br /> ' the results of tank removal soil sample analyses, additional investigation of the <br /> subject site was mandated by the SJCEHD. In January of 1993, E2C, Inc. <br /> ' collected soil samples from four borings and an existing stockpile of soil <br /> generated during tank removal operations, and in April of 1993, E2C, Inc. <br /> ' collected four additional soil samples and a grab groundwater sample. The <br /> results of this sampling indicated that soil and groundwater beneath the <br /> ' subject site has been impacted by petroleum hydrocarbons. <br /> ' 2.2 Geology and Hydrology <br /> ' Soils encountered during the drilling of well MW-1 included a coarse-grained <br /> ' sandy clay from the ground surface to an approximate depth of 25 feet <br /> were a silty clay was encountered. The silty clay extended to an <br /> ' approximate depth of 30 feet where a coarse-to-fine grained sandy clay was <br /> encountered that extended to the total depth of the boring at approximately <br /> ' 50 feet. Groundwater was encountered at an approximate depth of 39 feet <br /> during the drilling of well MW-1 . The static groundwater level in well MW-1 <br /> ' was measured at approximately 36 feet on August 6, 1997. <br /> ' E2C, Inc. September 18, 1997 <br />