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• 1117 Lone Palm Avenue <br /> Suite 3 <br /> Modesto, CA 95351 <br /> 209.579.2221 <br /> Fax 209.579.2225 <br /> April 9, 1999 <br /> 90954 <br /> Ms. Carol Oz <br /> San Joaquin County Public Health <br /> Services, Environmental Health Division <br /> ' 304 E. Weber Street, Third FIoor <br /> Stockton, CA 95202 <br /> ' Subject: Well Survey for Eggiman, Andrew and Edith Trust, for the Property at 1112 East <br /> Harding Way, Stockton, California <br /> ' Dear Ms. Oz: <br /> ATC Associates, Inc. has performed a well survey, on behalf of Eggiman, Andrew and Edith <br /> Trust, to identify potential receptors located in the vicinity of the above referenced site (Figure 1). <br /> This work was performed at the request Ms. Carol Oz of the San Joaquin County Public Health <br /> Services Environmental Health Division (PHSIEHD), during a phone conversation on May 19, <br /> 1998. <br /> ' SITE LOCATION <br /> The site is located on the south side of East Harding Way in Stockton, California, as shown on <br /> Figure 1. The property is located in a mixed residential, commercial, and industrial area. The site <br /> is currently occupied by a hydraulic repair facility. <br /> ' BACKGROUND <br /> In April 1987, SEMCO removed and disposed of two 1,000-gallon regular gasoline underground <br /> ' storage tanks (USTs), associated piping, and fuel dispenser from the locations shown on Figure 2. <br /> A soil sample was collected from the end of each tank at approximately 17 feet below ground <br /> ' surface. Analytical testing indicated the collected samples contained detectable concentrations of <br /> petroleum hydrocarbon constituents. The excavation was subsequently backfilled to the ground <br /> surface. <br /> ' On July 24, 1997, to investigate the extent of residual soil contamination at the site, a total of six <br /> soil borings were advanced to depths ranging from approximately 16 to 31 feet below ground <br /> ' surface (bgs). Detectable concentrations of total petroleum hydrocarbons as gasoline (TPHg), <br /> total petroleum hydrocarbons as diesel (TPHd), and benzene, toluene, ethylbenzene, and xylenes <br /> i (BTEX) were observed in soil samples collected from the site, The distribution of petroleum <br /> ' constituents beneath the site has been essentially defined and appears to be limited laterally to the <br />