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r <br /> I <br /> 1260 Graphics Drive <br /> Modesto California <br /> CV,A 95351 <br /> TC <br /> 209 579 2221 <br /> Fax 209 579 2225 <br /> A S S O C I A T E S I N C <br /> t <br /> August 24, 1998 PAYMENT <br /> �e�',O <br /> 62577 <br /> AUG 2 5 1998 <br /> PU AN JOAQ UfiY c.t,Un,,y <br /> ENVIRONMENFTA HEAL7N- S10N <br /> Ms Lori Duncan <br /> San Joaquin County Public Health <br /> Services, Environmental Health Division <br /> 304 E Weber Street, Third Floor <br /> Stockton, California 95202 <br /> Subject Workplan for Additional Subsurface Investigation at Diesel Performance, 2804 E <br /> Fremont Street, Stockton, California <br /> Dear Ms Duncan <br /> ATC Associates Inc has prepared this workplan, on behalf Diesel Performance for the <br /> . performance of additional subsurface investigation activities at the above referenced site The <br /> purpose of the subsurface investigation is to define the vertical extent of impacted soil and <br /> determine if groundwater has been impacted This work being done at the direction of San <br /> Joaquin County Public Health Services Environmental Health Division (PHS/EHD) in <br /> correspondence dated June 12, 1998 <br /> The scope of work includes obtaining permits, advancing one soil boring and collecting soil <br /> samples, installing one groundwater monitoring well, developing the well, collecting groundwater <br /> samples, laboratory analysis of selected soil and groundwater samples, and preparing a summary <br /> report The scope of work is described in detail in the following paragraphs <br /> SITE LOCATION <br /> The site is located on the south side of Fremont Street and east of Filbert Street in Stockton, <br /> California, as shown on Figure 1 The location is a commercial area and the site is currently <br /> occupied by Diesel Performance <br /> BACKGROUND <br /> In February 1987, SEMCO removed and disposed of one 3,000-gallon unleaded gasoline <br /> underground storage tank (UST), associated piping, and fuel dispenser from the location shown <br /> on Figure 2 A soil sample collected at 13 feet below ground surface contained elevated <br /> concentrations of petroleum hydrocarbon contaminants The excavation was subsequently <br /> backfilled and resurfaced <br /> w 162577\reporislwkpwei doc 1 <br />