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Lv <br /> T <br /> L.. <br /> A S S O C I A T E S I N C <br /> Summary Report of <br /> Subsurface Investigation <br /> i~.. Rossetti Market <br /> 25411 Lone Tree Road <br /> V Escalon, California <br /> +- ATC Project No. 14980.0001 <br /> 1.0 INTRODUCTION <br /> ATC Associates Inc. has prepared this letter report, on behalf of Ms. Lida Rossetti to summarize <br /> findings of the subsurface investigation performed at the above referenced site (Figure 1). The <br /> L purpose of the subsurface investigation was to determine the extent of residually petroleum <br /> hydrocarbon impacted soil. This work was done at the request of San Joaquin County Public <br /> Health Services, Environmental Health Division (PHS/EHD). The findings of the subsurface <br /> investigative study are summarized in the following paragraphs. <br /> 1.1 Site Location <br /> The site is located on the north side of Lone Tree Road and the west side of Escalon-Bellota <br /> Road in Escalon, California, as shown on Figure 1. The location is a commercial and agricultural <br /> �.. area and the site is currently occupied by Rossetti's Market. <br /> 1.2 Background <br /> L <br /> In September 1987, one 1,000-gallon unleaded gasoline underground storage tank (UST), two <br /> 3,000-gallon unleaded gasoline USTs, one 7,000-gallon leaded gasoline UST, and all associated <br /> L piping and dispensing equipment were removed and transported off-site. Laboratory analysis of <br /> soil samples collected from beneath one of the former 3,000-gallon USTs location indicated the <br /> L presence of detectable concentrations total petroleum hydrocarbons. After the tanks were <br /> removed, the areas of the former tanks were backfilled. <br /> IL 2.0 METHODS AND PROCEDURES <br /> F To investigate the extent of residually petroleum hydrocarbon impacted soil at the site, a total of <br /> five soil borings were advanced in the vicinities of the former USTs and the fuel dispenser. All <br /> field activities were performed in accordance with ATC's Workplan for Subsurface Investigation <br /> at 25411 Lone Tree Road, Escalon, California, dated November 10, 1997, and modifications to <br /> t`.. the workplan made in the field with the approval of Ms. Margaret Lagorio of PHS/EHD. The <br /> 3 <br /> workplan was approved by PHS/EHD with minor modifications. <br /> w:1t4980Veportslsum.doc 1 <br /> I <br />