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_ Y <br /> N'. r <br /> ENVIRONMENTAL LNG ' f <br /> 2460 Countryside Drive, P,laoerville Galifornia,9567 Phone:(530)295-1992-Fax:(530)642-1760 <br /> January 28, 2000 <br /> Project No. 2002-1426-02 <br /> Mr. Ron Rowe <br /> San Joaquin County Public Health Service <br /> Environmental Health Division <br /> 304 Weber, Third Floor <br /> Stockton, CA 95202 <br /> 1 <br /> Re: Workplan to Conduct an Additional Soil and Groundwater Investigation at the <br /> Former Dolly Madison Facility Located at 1426 South Lincoln Street, Stockton, <br /> California <br /> Dear Mr. Rowe: <br /> On behalf of Interstate Brands Corporation (IBC), Stratus Environmental, Inc. (Stratus), <br /> has prepared this workplan to conduct an additional soil and groundwater investigation at <br /> the former. Dolly Madison facility located at 1426 South Lincoln Street, Stockton, <br /> California (Figure 1). This workplan has been prepared based on the results of previous <br /> subsurface investigations conducted at the site and discussions with representatives of <br /> San Joaquin County Department Public Health Services, Environmental Health Division <br /> (PHS/EHS). The purpose of this investigation is to delineate the vertical extent of <br /> petroleum hydrocarbons beneath the site. <br /> BACKGROUND <br /> The subject site is located in a mixed commercial/residential neighborhood in central <br /> Stockton and was formerly a depot for Dolly Madison. The site is located approximately <br /> I <br /> 200 feet south of the intersection of Charter Way and South Lincoln Street in Stockton, <br /> California. On July 29, 1988, SEMCO of Modesto, California, observed the removal of a <br /> 1,000-gallon underground storage tank (UST). Based on analytical results of soil <br /> samples collected from beneath the former UST, residual hydrocarbons were present. <br /> Total petroleum hydrocarbons as gasoline (TPHG) was detected at a concentration of 95 <br /> parts per million. Benzene, total petroleum hydrocarbons as diesel, kerosene, and motor <br /> oil were below laboratory detection limits. <br /> In February 1997, EMCON drilled three soil borings onsite. Soil boring B-1 was <br /> converted to vapor extraction well VW-1, and borings B-2 and B-3 were converted to <br /> groundwater monitoring wells MW-1 and MW-2, respectively. Based on analytical data <br /> collected from the soil borings, residual hydrocarbons were detected in the soil borings. <br /> The highest concentrations were detected in soil boring B-1, which was located within the <br /> former UST cavity. Residual petroleum hydrocarbons were not detected in the vadose <br /> C:\My Documents\STRATUS\Ibc\Stockton\workplan.doc ST,�,4TUS <br /> i <br />