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TABLE 4 <br /> CURRENT GROUND WATER ANALYTICAL TESTING RESULTS <br /> Wards and Unocal Wells <br /> December 2002 <br /> concentration In pg/L <br /> Sample ID Unit D FW I TP11-G IiIFNZENEJ sec-BB I N-BUI YL 1,2-DCA EB 1PB I M I U I NAPHr I N-PB l OLUENE I 1,2,4-rmi3 1,3,5-TMB XYLN NES I METIIANOL ETHANOL <br /> MW-22D <br /> 05/04/43 B 1279 1 <50 <0 5 <0 5 <0 5 <0 5 <0 5 -05 <0 5 <1 0 <0 5 <p 5 <05 <p 5 <0 5 NA NA <br /> MW-23S <br /> 05/05/03 C 3250 <50 <0 5 1 <0 5 <0 5 <U 5 <p 5 <p 5 <U 5 <l 0 <0 5 <0 5 <0 5 <D 5 <0 5 NA NA <br /> MW-23D <br /> 05/05/03 D 3260 <50 <0 5 <p 5 <0 5 <U 5 <0 5 <4 5 <0 5 <1 U <0 5 <0 5 <0 S <0 5 <0 5 NA NA <br /> MW-24S <br /> 05/04/03 C 32 96 400 2 5 <0 5 <05 <05 <0 5 U 5 <05 6 g <p 5 1 2 <U 5 <p 5 0 66 NA NA <br /> MW-24D <br /> 05/04/03 D 33 12 <SD 69 <0 5 <0 S <0 5 <U 5 <p 5 <U 5 <1 0 <0 5 <0 5 <p 5 <p 5 <0 S NA NA <br /> MW-25S <br /> 05/05/03 A 32 39 <50 <U 5 <0 5 <0 5 <U 5 <U 5 <0 5 <U 5 <1 0 <0 5 <U 5 <U 5 <U 5 <U 5 NA NA <br /> MW-25D <br /> 05/05/03__[__ 13 1 -1248 1200 41 3 7 <p 5 0 55 31 7 8 <0 5 90 IQ 16 98 100 60 NA NA <br /> AS-26 <br /> 05/05/03 B 1 3243 <50T <05 <05_r <05 <05 <0 5 1 <0 5 1 <0 5 <1 0 1 <0 5 <p 5 <p 5 <p 5 1 <0 5 NA NA <br /> MW-27 <br /> 05/06/03 B 3275 <54 <p 5 <U 5 <U S <p 5 <0 5 <p 5 <p 5 <I 0 <U 5 <p 5 <0 5 <f1 5 <0 5 NA NA <br /> NOTES <br /> Unit=Hydlostratlgt-apluc Unit In which the well is screened <br /> Only compounds which were detected are shown on this table <br /> 05/06/03 Chloromethane(3 3 pg/L), and 1,1 dtchloroelhane(0 64 pg/L) were detected in well MW-1 p-Isoporpyltoluene was detected in wells MW-1 (1 2 pg/L),MW-4(7 0 pg/L), MW-6(5 9 pg/L), <br /> MW-11(1 4 pG/l), (MW-24S(0 85 pg/L),and MW-25D(4 2 pg/L) Tetrachlorocthene was also detected in wells MW-21 S(0 85 pg/L)and MW-27(4 6 pg/L) Trichloroethene was <br /> detected to well MW-27(1 6 pg/L) <br /> NS -Not Sampled <br /> <=Not detected at or above concentration limit listed <br /> DTW=Depth to Water EB=Elhylbenzene N-PB =n-Propylbenzene NAT Not Analyzed <br /> 1,2,4-TMB = 1,2,4-Trlmethylbenzene IPB =lsopropylbenzene NAPM =Naphthalene ND=Not Detected <br /> 1,2-DCA= 1,2-Dichloioethane M FBE=Methyl Tertiary Butyl Ether sec-BB =sec-Butylbenzene NS=Not Sampled <br /> 1,3,5-TMB =1,3,5-Tritnethylbenzene N-BU I YL=n-Butylbenzene rm-G =Total Petroleum Hydrocarbons as Gasoline <br /> 1232 ANALYTICAL DATA Page 3 of 3 ENVIROr MEWALAUDIT,/INC <br />