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f <br /> GROUND ZERO ANALYSIS, INC. <br /> 0 � u;..• <br /> ,r^ <br /> 1714 Main Street "" P/1 12. <br /> Escalon,California 95320 v <br /> Telephone:(209)838-9888 <br /> Facsimile:(209)838-9883 <br /> November 18, 1999 <br /> DIVISION <br /> 304 E. We(s-=.!'Ave.. f <br /> Ms.Lori Duncan <br /> P. O. Box 384, St)cktun CA 95201-0388 <br /> Approver) <br /> San Joaquin County Public Health Services Denied <br /> Environmental Health Division Conditions <br /> 304 East Weber Avenue,Third Floor <br /> Stockton, CA 95202 Date l i i by c <br /> Subject: Workplan for Subsurface Investigation <br /> Franks Tire Service <br /> 5023 Market Street,Linden, CA <br /> Dear Ms. Duncan: <br /> This letter report is submitted to present a proposed workplan to conduct a subsurface investigation <br /> at the subject site (Figure 1). In correspondence dated May 20, 1999, San Joaquin County Public <br /> Health Services, Environmental Health Division (PHS/EHD) requested further investigation of the <br /> site to delineate the vertical and lateral extent of residual contamination. <br /> The general scope of work will consist of drilling and sampling five (5) soil borings in the vicinity of <br /> the former underground storage tanks (USTs) to investigate the vertical and lateral extent of residual <br /> soil contamination, and preparing a technical report that summarizes the methods and results of the <br /> subsurface investigation. <br /> BACKGROUND <br /> The site is currently operated as a tire shop and residence. The facility previously utilized two 1,000- <br /> gallon USTs for storage of leaded gasoline and one 350-gallon UST for the storage of waste oil <br /> (Figure 2). The gasoline USTs were removed under permit from PHS/EHD on December 18, 1998 <br /> and the waste oil UST was removed under permit on May 11, 1999. Soil samples collected beneath <br /> the northernmost gasoline UST (Tank 2, 12/18/98) and the waste oil UST (Tank 1, 05/10/99) <br /> contained petroleum hydrocarbon constituents at levels exceeding laboratory detection limits. <br /> Analytical results are summarized in Table 1. The locations of the former USTs and collected soil <br /> samples are shown on Figure 2. <br /> data/groundze/frankstire/wpl 199.doc <br />