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TAR 4 <br /> GROUNDWATER ANALYTICAL RESULTS <br /> EPA Method 8260B <br /> 640 N El Dorado Street ' <br /> Page 1 of 1 Pages <br /> (in parts per billion) <br /> Date Sample IU TBA MTBE D1PF hTBE TAME 1,2`DCA EDB Chloroform I 1,2 I)CF PCE I TCE 11,2-DCB NarpthaIene 1.,2,4-TMB <br /> 12/20/00 MWl <20 <20 <20 <20 <20 <20 <20 58 29 29 33 <20 <20 <20 <br /> MW2 <20 <2 0 <2 0 <2 0 <2 0 <2 0 <2 0 59 <2 0 23 <2 0 <2 0 <2 0 <2 0 <br /> MW3 <500 <50 <50 <50 <50 <50 <50 <50 <50 <50 <50 87 86 120 <br /> MW4 <20 <20 <20 <20 <20 <20 <20 10 <20 18 <20 <20 <20 <20 <br /> 6/28/01 MWl <20 <20 <20 <20 <20 <20 <20 47 <20 22 <20 <20 <20 <20 <br /> MW2 <20 <20 <20 <20 <20 <20 <20 28 <20 19 <20 <20 <20 <20 <br /> MW3 Not Sampled due to free product <br /> MW4 <10 <20 <20 <20 <20 <L0 <Z0 <20 <20 15 <l0 <20 <l0 <20 <br /> 9/21101 MWI <20 <20 <20 <20 <20 40 <20 36 40 18 26 <20 <20 <20 <br /> MW2 <20 <20 <20 <20 <20 <20 <20 34 <20 19 40 <20 <L0 40 <br /> MW3 Not Sampled due to free product <br /> MW4 <20 <20 <20 <20 <20 <20 <20 40 22 17 <20 <20 <20 <20 <br /> NOTES <br /> TBA = t-Butanol TAME = t Ayml Methyl Ether PCE = Tetrachloroethene <br /> MTBE = Methyl t-Butyl Ether 1,2 DCA — 1,2-Dichloroethane TCF- Trichloroethene <br /> DIPE — Dt Isopropyl Ether EDB = Ethylene Dibromide 1,2-DCB = 1,2 Dtchlorohenzene <br /> ETRE = Ethyl-t-Butyl Ether 1,2-DCE = cis-1 2 Dichloroethene 12,4 TMB — 1,2,4 Tnmethylbenzene <br /> a = Concentration is approximate due to interference of gas range and heavy hydrocarbon range constituents <br /> GW lab xIs/VOCs <br />