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�rl rr rr r rr �r ur rr � r rr r rr �r <br /> Table 1 <br /> Recent Groundwater Analytical Results <br /> Former Unocal Station No 5098 <br /> 5400 and 5606 Pacific Avenue <br /> Stockton, California <br /> Sample ID Unit DTVY TPHg BENZENE N-BUTYL sec-BB 1,2-DCA EB IPB MtBE NAPHT N-PB TOLUENE 1,2,4 TMB 1,3,5 TMB XYLENES METHANOL ETHANOL <br /> I <br /> r) (MIL) (u /L (E-IL) (U91L) (u /L) (u /L) (u /L) (u /L) (u /L) (491L) (u /L) (U91L) {u /L) (u /L (u /L) (u /L) <br /> MW-25S <br /> 12/23/03 A 3500 <50 <05 <0 5 <0 5 31 <05 <0 5 <0 5 12 062 <0 5 24 <05 <1 0 NA NA <br /> 02/27/04 A 34 OS <50 <0 50 <0 50 <0 50 66 <0 50 <0 50 058 <0 50 <0 50 <0 50 <0 50 <0 50 <1 0 NA NA <br /> MW-25D <br /> 12/23/03 8 35 65 880 <2 5 <2 5 <2 5 <2 5 140 32 <2 5 100 77 83 310 68 88 NA NA <br /> 02/27/04 B 3411 2,000 11 55 37 <10 270 79 <10 310 170 13 590 i50 140 NA NA <br /> MW-27 <br /> 12118/03 B 35611 <50 <0 5 <0 5 <0 5 <0 5 <0 5 <05 <0 5 <05 <0 5 <05 <0 5 <0 5 <1 0 NA NA <br /> 02127104 B 3457 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <1 0 NA NA <br /> AS-26 <br /> 12/23/03 B 3521 <50 <0 5 <0 5 <0 5 <05 <0 5 <0 5 <0 5 <0 5 <05 <0 5 <0 5 <0 5 <1 0 NA NA <br /> 02/27/04 B 3409 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <1 0 NA NA <br /> I <br /> NOTES <br /> Unit =Hydrostratigraphic Unit in which the well is sereened <br /> Only eompou�ds which were detected are shown on this table <br /> 08/05/03 =p-Isopropyltaluene was detected in wells MW-2(2 9 pg/L).MW-11 (3 8 pg/L)and MW-25D(0 62 pg/L) Styrene(1 0 pg/L) was detected in well MW-11 <br /> Wells MW-18(0 52 pg/L) MW-21 S(0 65 pg/L)and MW-27(3 6 pg/L)also contained Telrachloroethene Well MW-27 contained Tnchloroethene(0 98 pg/L) <br /> NS =Not Sampled <br /> uglL =Micrograms per Liter <br /> < =Not detected at or above concentration limit listed <br /> DTW =Depth to Water EB =Ethylbenzene N-PB =n-Propylbenzene NA =Not Analyzed <br /> 1,2,4-TMB =1,2,4-Tnmethylbenzene IPB =Isopropylbenzene NAPHT =Naphthalene ND =Not Detected <br /> 1,2-DCA = 1,2-Dichloroethane MtBE =Methyl Tertiary Butyl Ether sec-BB =sec-Butylbenzene NS =Not Sampled <br /> 1,3,5-TMB =13 5-Trimethylbenzene N-BUTYL =n-Butylbenzene TPHg =Total Petroleum Hydrocarbons as Gasoline <br /> Although sample contains compounds in the rentention time range associated with gasoline,the chromatogram was not consistent with the expected chromatographic patter or <br /> fingerprint However,the reported concentration is based on gasoline <br /> 06940-293 5 of 5 <br /> E=NSR Corporation <br />