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1260 Graphics Drive <br /> Modesto, California <br /> IW/ 95351 <br /> 209.579.2221 <br /> Fax 209.579.2225 <br /> A S S O C I A T E S I N C <br /> April 8, 1998 RECF71VED <br /> 14565 APR 10 1998 <br /> ENVIRONMENTAL HEALTH <br /> PERMIT/ SERVICES <br /> Ms. Carol Oz <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 Subsurface Investigation at 6732 East Highway 88, Stockton, <br /> California <br /> Dear Ms. Oz: <br /> ATC Associates Inc. has prepared this workplan, on behalf of Ms. Lolly Bozzano for the <br /> performance of a subsurface investigation at the above referenced site. The purpose of the <br /> subsurface investigation is to determine the vertical extent of petroleum hydrocarbon <br /> contamination, if any, in the vicinity of the former underground storage tanks (USTs). This work <br /> being done at the direction of San Joaquin County Public Health Services Environmental Health <br /> Division (PHS/EHD). The proposed scope of work includes obtaining permits, advancing one <br /> soil boring, soil and groundwater sampling, laboratory analysis of selected soil and groundwater <br /> samples, and preparing a summary report. The scope of work is described in detail in the <br /> following paragraphs. <br /> SITE LOCA'T'ION <br /> The site is located on the northeast side of Fairchild Lane and the southeast side of Highway 88 in <br /> Stockton, California, as shown on Figure 1. The location is a commercial and agricultural area <br /> and the site is currently occupied by Three Palms Grocery. <br /> BACKGROUND <br /> Prior to July 1984, one 550-gallon waste oil UST, identified as Tank #4, was emptied of product, <br /> filled with sand, and capped with concrete. In November 1986, one 1,000-gallon regular gasoline <br /> UST, identified as Tank #3, was removed and disposed of. A soil sample collected during the <br /> removal of Tank #3 contained elevated concentrations of petroleum hydrocarbons. In May 1989, <br /> one 1,000-gallon unleaded UST, identified as Tank #1 was filled with five cubic yards of concrete. <br /> Currently two USTs, identified as Tanks #2 and #5, remain in place and are in operation. <br /> wA14565Veports\w4.doe I <br />