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m Avenue, Suite B <br /> N <br /> (2VATC <br /> 1117 Lone PModesto,, CA 953511 <br /> www.atcassociates.com <br /> 209-579-2221 <br /> A S S 0 C I A T E S I N C . Fax 209-579-2225 <br /> Environmental, Geotechnical and Materials Engineers <br /> 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 /> l <br /> I <br /> 1 .0 INTRODUCTION <br /> ATC Associates Inc . (ATC) has prepared this report, on behalf of Mr. and Mrs. Ernest Foppiano, <br /> to summarize results of subsurface investigation activities performed at the former Stockton City <br /> Taxi Cab Company located at 2085 East Fremont Street in Stockton, California (Figure 1 ) . The <br /> purpose of the subsurface investigation was to evaluate the extent of petroleum hydrocarbon <br /> impacted groundwater beneath the site. This work, was conducted at the request of the San <br /> Joaquin County Environmental Health Department (SJCEHD) . <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 1 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 /> hi 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 /> MWl 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 MW 1 through MW4. <br /> 5:\Enviromental\28349\reports\sum.doc 1 ATC Associates Inc. <br />