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1117 Lone Palm Avenue <br /> Suite B <br /> (V*:ATC Modesto CA 95351 <br /> 209 579 2221 <br /> Fax 209 579 2225 <br /> ASSOCIATES I NC <br /> 07 <br /> November 3, 1999 <br /> 54 52577 0001 ENVIRONMENTAL HEALTH DIVISION <br /> 304 E Weber Ave Third Floor <br /> P O Box 388, Stockton CA 95201-0388 <br /> Approved 0' <br /> Denied ❑ <br /> Ms Lon Duncan Conditions <br /> San Joaquin County Public Health <br /> Services, Environmental Health Division Date It S6 by <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 Inc , for the <br /> performance of additional subsurface investigation activities at the above referenced site The <br /> purpose of the subsurface investigation is to evaluate the horizontal extent of petroleum impacted <br /> soil and groundwater in the vicinity of the former underground storage tank (UST) This work <br /> being done at the direction of San Joaquin County Public Health Services Environmental Health <br /> Division (PHSIEHD) in correspondence dated September 9, 1999 <br /> The scope of work includes obtaining permits, advancing three soil borings and collecting soil <br /> samples, installing three groundwater monitoring wells, developing and sampling the wells, <br /> laboratory analysis of selected soil and groundwater samples, and preparing a summary report <br /> 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 UST, <br /> associated piping, and fuel dispenser from the location shown on Figure 2 A soil sample <br /> collected at 13 feet below ground surface (bgs) contained elevated concentrations of petroleum <br /> hydrocarbon contaminants The excavation was subsequently backfilled and resurfaced <br /> w 1625771reportslwkpwels doe 1 <br />