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� �ir� air ■rE ■� ■r � � �r r r� r� ,■� ■� r r� <br /> TAB E 4 <br /> CURRENT GROUND WATER ANALYTICAL TESTING RESULTS <br /> Wards and Unocal Wells <br /> December 2002 <br /> concentration in pg/L <br /> Sample Ill I Unit I DTW TPH-G BENZENE sec-BB IN-BUrYLj1,2-DCAj E13 I 1PB IMTBEINA.PIITI N-PB I TOLUENE I 1,2,4-TMB I 1,3,5-TMB I XYLENES I ME]HANOL ETHANOL <br /> MW-22D <br /> 02/21/03 H 3340 <50 095 <05 <0 5 <05 r <05 <0 S <0 5 <1 q <q 5 <q 5 10 5 <0 5 <0 5 NA NA <br /> MW-23S <br /> 02/19/03 C 32 30 <50 1 3 <6-5- <0 5 <D 5 0 6 <0 5 <0 5 <1 0 <0 5 0 65 <0 5 <0 5 0 74 NA NA <br /> MW-230 <br /> 02/19/03 D 33 31 <50 Q 73 <U 5 -<05 <0 5 <p g <q 5 <q 5 <1 0 1 <05 fl 55 <0 5 <0 5 <0 5 NA NA <br /> MW-24S <br /> 02/21/03 C 33 86 870 170 <5 0 <5 0 <5 0 <5 0 63 <5 0 <10 <50 <5 0 38 5 0 <5 0 NA NA <br /> MW-24D <br /> 02/21/03 D 33 83 <50 19 <05 <05 <05 <q 5 <0 S <q 5 <E 0 <U 5 <q 5 <0 5 <p 5 <0 5 NA NA <br /> MW-25S <br /> 02/18/03 A 33 12 22U <0 S <0 5 <0 5 2 0 <p 5 <0 5 <q$ <1 0 <U 5 <q 5 <p 5 <0 S <p 5 NA NA <br /> MW-25D <br /> 02/18/03 B 33 23 1640 3 6 4 0 6 7 <0 5 52 10 <0 5 18U 20 24 120 110 ]b0 NA NA <br /> AS-26 <br /> 02/21/03 B 33 15 <50 <0 5 <0 5 <0 5 <U 5 <0 5 <0 5 <0 5 <I 4 <0 5 <0 5 <0 5 <0 5 USI NA NA <br /> MW-27 <br /> 02/21/03 B 33 15 <50 <0 5 <0 5 <0 5 <0 5 <0 5 <q 5 <q 5 <1 0 <0 5 0 97 <0 5 <0 5 f 2 NA NA <br /> NOTES <br /> Unit=Hydrostrattgraphic Unit to which the well is sereened <br /> Only compounds whu.h were detected are shown on this table <br /> 02/18/03 Tetrachloroethene was detected in wells MW-18(0 75 pg/L), MW-2IS(0 95pg/L),and MW-27(3 7 pg/L), p-Isopropyltoluene was detected inwells MW-16(1 1 pg/L)and MW-25D(2 9 pg/L), <br /> and Tnehloroethene(1 4 pg/L)was detected to well MW-27 <br /> NS =Not Sampled <br /> <=Not detected at or above concentration limit listed <br /> DTW=Depth to Water EB=Etltylbenzene N-P13 =n-Propylbenzene NA=Not Analyzed <br /> 1,2,4-TMB = 1,2,4-rnmethylbenzene 1PB =Isopropylben7ene 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= 1,3,5-Tiimethylbenzene N-BUTYL=n-Bulylbenzene TPH-G=Total Petroleum Hydrocarbons as Gasoline <br /> 1232 ANALYI]CAL DA FA Page 3 of 3 ENTY7RONAIENTAL AUDIT,1AC <br />