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TABLE 7 GROUND WATER TESTING RESULTS Wards and Unocal Wells March 2002 concentration In pg/L Sample ID Unit IITW IPH-G I BENZENE sec-BB I N-BUTYL I,2-DCA I EB IPB MIBL NAPHT N-PB IOLUENE 1,2,4-TMB 1,3,5-CMB XYLENES METHANOL FTI[ANOL MW-22D 03/03/02 B 31 93 390 <2 0 <2 0 <2 0 <2 0 1 <2 0 <2 0 <1 0 <5 0 <2 0 <2 4 <2 0 <2 0 4 0 NA NA MW-23S 03/03/02 C 13153 25000 <1000 <1400 <1400 <1000 <1004 <1000 <50 <2500 <1000 <1000 <]000 <]000 <]000 NA NA MW-23D 03/03/02 D 3164 11000 <1000 <1000 <1000 <1000 <1000 <iflQO <54 <2540 <1000 <]000 <1000 <1Q04 <1040 NA NA MW-24S 03/03/02 C 32 07 57 8 1 <20 <2 0 <2 0 2 4 <2 0 <1 0 <5 0 <2 0 <2 0 2 1 <2 0 <2 p NA NA MW-24D 03/03/02 1) 32 23 <50 <2 0 <2 0 <2 0 <2 0 <2 0 <2 0 1 3 <5 0 <2 0 <2 0 <2 0 <2 0 <2 0 NA NA MW-25S 03/03/02 A 3139 85 <4 fl <4 0 <4 0 4 5 <4 0 <4 0 1 1 <1 D <4 0 <4 0 <4 0 <4 0 <4 0 NA NA MW-25D 03/03/02 B 3144 49000 2000 <330 <330 <330 1000 <330 <17 <830 <330 6000 1400 360 7400 NA NA AS-26 03103102 B 3143 1 9200 <100 <100 <100 <100 <]00 <100 <50 <250 <1D0 <100 <1D0 <]00 <]00 NA NA MW-27 03/03/02 B 31 66 <50 <2 0 <2 0 <2 0 <2 0 <2 0 <2 0 <1 0 <5 4 <2 0 <2 0 <2 0 <2 0 -<20 NA NA NOTES Unit=Hydrostratigraphlc Unit m which the well is sereened Only compounds which were detected are shown on this table 09/25/01 Tetrachloroetbene was detected 1n wells MW-27(4 1 pg/L)and MW-18(1 6 pg/l.) p-Isopropyltoluene was detected in well MW-8D @ 45'(25 pglkg) <=Not detected at or above concentration limit listed DTW=Depth to Water EB=Ethylbenzene N-PB=n-Propylbenzene NA =Not Analyzed 1,2,4-TMB= 1,2,4-Trimethylbenzene IPB—lsopropylbenzene NAPHT—Naphthalene ND=Not Detected 1,2-DCA=1,2-Dichloroethane MTBE=Methyl Tertiary Butyl Ether sec-BB =sec-Butylbenzene NS =Not Sampled 1,3,5-TMB= 1,3,5-Tnmethylbenzene N-BUTYL =n-Butylbenzene TPR-G =Total Petroleum Hydrocarbons as Gasoline 1232 ANALYI ICAL VATA Page 3 of 3 ENVIRONMENTAL AUDIT,INC