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Chevron U.S.A. - Page 13 <br /> TABLE f I I <br /> Concentration of Petroleum Constituents in Ground Water <br /> (Concentrations Expressed in Parts Per Billion) <br /> Sam le I.D. Benzene Toluene �lenes i <br /> Well DM-1 n/d n/d n/d <br /> Well DM-2 n/d n/d n/d <br /> Well DM--3 n/d n/d n/d { <br /> 3 <br /> Legend: <br /> n/d - non-detected Ethbnz. - ethylbenzene - less than <br /> Methods of analysis and detection limits: <br /> EDB/DBCP - Modified Method AB 1803, 0.01 pg/g <br /> BTEX-TPH, H2O - EPA Method GC/MS 524.2, 0.50 pg/L <br /> BTEX-Gasoline - EPA Method 8020, 0.02 pg/g <br /> TPH-Gasoline - D.O.H.S./L.U.F.T Method, 5.0 pg/g <br /> TPH-Diesel - D.O.H.S./L.U.F.T. Carbon Disulfide Extraction Method, 10.0 µg/g <br /> Organic Lead - State Draft L.U.F.T. Method, 1.0 mg/kg <br /> 1 <br /> For more detailed information regarding the results of chemical analysis <br /> conducted on soil and ground water samples obtained at the subject property, <br /> please refer to the certified analytical reports and chain of custody forms which <br /> have been included in Appendix B of this report. <br /> DAMES &MOORE <br />