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November 7, 1986 AGS 8691-3 <br /> Beacon Service Station #1-502 - Lodi, California <br /> Water samples were analyzed according to guidelines set forth in <br /> EPA method 602 for volatile hydrocarbons and EPA method 3510 for <br /> extactable hydrocarbons. Results are presented in Table 3 and <br /> the laboratory reports for all analyses are included in the <br /> Appendix of this report. <br /> TABLE 3 <br /> RESULTS OF CHEMICAL ANALYSES OF WATER SAMPLES <br /> BEACON STATION #1-502, LODI, CALIFORNIA <br /> SAMPLE ETHYL- <br /> NUMBER THCV THCE* BENZENE BENZENE TOLUENE XYLENES <br /> W-50-MW1 3 .750 0.810 0.331 0.105 0.090 0. 550 <br /> W-50-MW2 1. 387 0.190 0. 104 0. 060 0. 020 0.235 <br /> W-50-MW3 0.037 ND ND ND ND ND <br /> Values listed are in milligrams per kilogram (parts per million) <br /> Detection limit: 0.002 ppm <br /> * Detection Limit 0. 05 ppm <br /> THC = Total hydrocarbons <br /> ND = Not present or below method detection limits <br /> These analyses indicate contamination of ground water samples <br /> collected from monitoring wells MW-1 and MW-2, while <br /> contamination has not been detected in samples collected from MW- <br /> 3 . The high levels of benzene and other volatile hydrocarbons <br /> and low levels of higher boiling point extractable hydrocarbons <br /> strongly implies that the ground water has been affected by <br /> gasoline, rather than by diesel. <br /> 9 <br /> 4PRI ed GeoSrSteinS <br />