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1 Remediation System <br /> Installation Report <br /> ' Jamar Property <br /> 4075 East Main Street <br /> Stockton, California <br /> ATC Project No. 54.26823.0001 <br /> 1.0 INTRODUCTION <br /> ' ATC Associates Inc. has prepared this Remediation System Installation Report for the Jamar <br /> Property located at 4075 East Main in Stockton, California. All work was completed in general <br /> accordance with GHH Engineering Inc.'s Interim Groundwater Treatment System, Jamar <br /> Service, 4075 East Main, Stockton, California, dated October 2003. The San Joaquin County <br /> Environmental Health Department (SJCEHD), approved this workplan in correspondence dated <br /> November 7, 2003 with minor comments. <br /> lb2.0 SITE LOCATION <br /> ' The site is located on the northwest corner of East Main Street and South Oro Avenue in <br /> Stockton California, as shown on Figure 1. The location is a commercial and residential area. <br /> The site is currently occupied by Jamar Service Station. <br /> 3.0 PREVIOUS ENVIRONMENTAL WORK <br /> In 1995, one 500-gallon waste oil underground storage tank (UST) and one 500-gallon kerosene <br /> UST were removed from the site. <br /> In December 1998, two 6,000-gallon and one 10,000-gallon gasoline USTs were removed from <br /> the site. Soil samples were collected from the tank pit and analyzed for petroleum hydrocarbons. <br /> ' Analytical testing indicated the samples collected from the tank pit contained detectable <br /> concentrations of petroleum hydrocarbon constituents. The excavation was subsequently <br /> backfilled and a 20,000-gallon UST was installed. <br /> - — In September 1999, John P. Cummings &-Associates (JPCA) advanced three soil borings; MWI,- - -- -- <br /> MW2, and MW3 to depths ranging from approximately 74 to 78 feet below ground surface (bgs). <br /> The borings were completed as monitoring wells. <br /> In August 2000, JPCA advanced three soil borings 131, MW4, and MW5, the latter two were <br /> completed as monitoring wells. Soil boring BI was advanced to a depth of 115 feet bgs and <br /> wells MW4 and MW5 were advanced to a depth of 75 feet bgs. Soil and groundwater samples <br /> ' w:lwordpro1268231reportslremsysinst.doe 1 <br />