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op _ <br /> r <br /> 4 ` - <br /> �1+K <br /> y <br /> v <br />`lv <br /> -- EXECUTIVE SUMMARY <br /> On March 11, 1989, TARGET Environmental Sex✓ices, Inc. <br /> (TARGET) conducted a soil gas survey at Mobil Service StationZO- <br /> 297, 1403 Country Cl!Jh Boulevard, Stockton, California. Analysis <br /> of the samples by GC/FID revealed moderately high levels of <br /> petroleum hydrocarbons on the site and chromatogram signatures <br /> confirmed -the presence of gasoline, *Sap patterns, concentration <br /> gradients and chromatographic data suggest that gasoline entered <br /> the subsurface on the eastern side of the sump islands and subse- <br /> quently migrated northeasterly :-toward Pershing Avenue. The <br /> �+ chromatogram signature of the sample near the apparent source is <br /> typical of "fresh" gasoline. <br /> Further investigation of the area around the pumps may be <br /> warranted. <br /> i 6 <br /> 1 <br /> .... 1 <br />