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f <br /> SwffH <br /> MIRONMENTALTECHNOLOGIES CORPORATION <br /> ire 0` 22 <br /> August 4, 1997 <br /> 97739 ,. <br /> Ms. Mary Meays <br /> San Joaquin County Public Health <br /> 14 Services, Environmental Health Division <br /> 304 E. Weber Street, Third Floor <br /> Stockton, CA 95202 <br /> Subject: Workplan-for Subsurface Investigation at Tracy Rural Fire Station#1, 22484 <br /> I' South Seventh Street, Banta, California <br /> Dear Ms. Meay s: <br />� - <br /> Smith Technology Corporation has prepared this workplan, on behalf of Tracy Rural Fire District <br /> for the performance of a subsurface investigation at the above referenced site. The purpose of the <br /> subsurface investigation is to determine the vertical and horizontal extent of soil and groundwater <br /> contamination, if any, 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 (PHS/EM). The proposed scope of work includes obtaining permits, advancing three <br /> soil borings, 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 LOCATION <br /> The site;is located on the south side of Grant Line Road and the east side of South Seventh Street <br /> in Banta, California; as shown on Figure 1. The location is a residential and commercial area. <br /> The site is currently occupied by Tracy Rural Fire Station#1. <br /> I BACKGROUND <br /> In October 1988, one 1,000-gallon gasoline underground storage tank (UST) and associated <br /> piping was removed from the location shown on Figure 2. A soil sample was collected from each <br /> end of the tank at approximately 11 feet below ground surface and a water sample was collected <br /> from the groundwater that was,present in the bottom.of the tank pit. Analytical testing indicated <br /> the collected samples contained detectable concentrations of petroleum hydrocarbon constituents. <br /> The excavation was subsequently backfilled. <br /> w:W739tireportslwkp.doc 1 <br /> 1260 Graphics Drive Modesto,CA 95351-1502 (209)579-2221 Fax(209)579-2225 <br /> Engineering - Consulting >>• Remediation • Construction <br />