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28 December 2004 <br /> AGE-NC Project No. 04-1238 <br /> Page 5 of 5 <br /> No other constituents of concern were detected at or above laboratory reporting limits. The <br /> laboratory report(CTEL Project No.CT214-0412087),quality assurance/quality control report,and <br /> chain of custody forms are attached to this letter report. <br /> CONCLUSIONS AND RECOMMENDATIONS <br /> In general, hydrocarbon stained clayey silt to silty sand was encountered from 5 to 15 feet bsg. In <br /> addition, significant concentrations of TPH-g, BTEX compounds and fuel additives were detected <br /> in groundwater samples collected from the soil boring locations;the BTEX compounds,MTBE and <br /> 1,2-DCA are present at concentrations above the Department of Health Services' Maximum <br /> Contaminant Levels for these contaminants in ground water. The vertical and lateral extent of <br /> groundwater contamination is not yet defined in any direction. <br /> Based upon the findings of this investigation, AGE recommends the preparation of a work plan to <br /> delineate the lateral and vertical extent of petroleum hydrocarbon-impacted soil and ground water. <br /> If you have any questions or require further information,please contact our office at(209)467-1006. <br /> Sincerely, <br /> D GEplo <br /> Advanced GeoEnvironmental,Inc. <br /> ALVIN F <br /> LEE <br /> * 7327 <br /> Donna J. Sexton Calvin F. Lee of �Q <br /> Staff Geologist Senior Project FA��F <br /> California Registered eologist No. 7327 <br /> cc: ✓Mr. Mike In u na, San Joaquin County Environmental Health Department <br /> Mr. Gurjit Gil, Property Owner <br /> Attachments: Figure 1 -Location Map <br /> Figure 2 - Site Plan <br /> Table 1 -Analytical Results of Soil Samples <br /> Table 2 -Analytical Results of Ground Water Samples <br /> CTEL Analytical Report (CT214-0412087) <br /> Advanced GeoEnvironmental,Inc. <br />