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Subsurface Investigation Report <br /> ' Former Stockton City Taxi Cab Company <br /> 2085 East Fremont Street <br /> Stockton, California <br /> ' ATC Project No. 54.28349.0001 <br /> ' 1.0 INTRODUCTION <br /> I <br /> ' ATC Associates Inc. (ATC) has prepared this report, on behalf of Mr. and Mrs. Ernest Foppiano, <br /> to summarize findings of the subsurface investigation activities performed at the former Stockton <br /> City Taxi Cab Company located at 2085 East Fremont Street in Stockton, California (Figure 1). <br /> The purpose of the subsurface investigation was to evaluate the extent of petroleum hydrocarbon <br /> impacted soil and groundwater and evaluate the groundwater gradient beneath the site. This work <br /> was conducted at the request of the San Joaquin County Environmental Health Department <br /> (SJCEHD). The findings of the subsurface investigative study are summarized in the following <br /> paragraphs. <br /> 1.1 Site Location <br /> The site is located at the northeastern corner of the intersection of East Fremont Street and Laurel <br /> ' Street in Stockton, California, as shown on Figures I and 2. The property is located in a mixed <br /> residential and commercial area. The site is currently occupied by a retail automobile business. <br /> ' 1.2 Background Information <br /> In 1998, two 10,000-gallon gasoline underground storage tanks (USTs) and associated product <br /> piping were removed from the site by Advanced GeoEnvironmental. Soil samples were collected <br /> from the tank pit and under product piping and analyzed for petroleum hydrocarbons. Analytical <br /> testing indicated the samples collected from the tank pit contained detectable concentrations of <br /> petroleum hydrocarbon constituents. <br /> ' In February 2000, WHF, Inc. (WHF) advanced two soil borings, B1 and B2, to depths of <br /> approximately 81.5 and 31.5 feet below ground surface (bgs), respectively. Soil and groundwater <br /> samples were collected from the borings and submitted for laboratory analyses. These soil and <br /> ' groundwater samples contained detectable concentrations of petroleum hydrocarbon constituents. <br /> In July 2003, WHF advanced six soil borings, four of which were completed as monitoring wells <br /> ' MW1 through MW4. Soil samples collected from these borings contained detectable <br /> concentrations of petroleum hydrocarbon constituents. Petroleum hydrocarbons were detected in <br /> groundwater samples collected from MWI through MW4. <br /> S:1Enviromental\283491reportslsum.doc I ATC Associates Inc, <br /> 1 <br />