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,.. PU <br /> Tracer iiamaareh Corporation <br /> INTRODUCTION <br /> A shallow soil gas investigation was performed by Tracer Research Corporation <br /> (TRC) at tae Del ]►Monte Plant #23/233 site located in Stockton, California. The <br /> irivestigation was conducted on May 213, 1991 ander contract to CH2M Hill. The purpose <br /> of the investigation was to delineate the extent of possible contamination in the subsurface. <br /> During this survey, a total of 23 soil gas samples were collected and analyzed. <br /> _W Samples were analyzed for volatile organic compounds from the following suite: <br /> COMI°OUND DETE OR <br /> benzene <br /> _ toluene FID <br /> ethylbenzene FID <br /> FID <br /> xylenes FID <br /> total volatile hydrocarbons (TVHC) FID <br /> Xylenes are reported as the total of the three xylene isomers. 'Total hydrocarbons are <br /> reported as gasoline range compounds consisting of approximately C4-C9 aliphatic,alicyclic, <br /> and aromatic compounds. <br /> The compounds in this suite wer; chosen as target compounds because of their <br /> suspected presence in the subsurface and amenability to soil gas technology. Soil gas <br /> i . <br /> Samples were screened on a gas chromatograph equipped with a flame ionization detector <br /> �. (FID). <br /> f <br /> 1 <br />