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MIM TABLE I HISTORICAL GROUND WATER ANALYTICAL TESTING RESULTS 5400 and 5606 Pacific Avenue,Stockton,California concentration In pg/L Sample ID I DTW I 1 PH G I BENZENE I sec BH I n BUTYL 1 1,2 DCA EB IPH I MTBE 1 NAPHT I n-PH TOLUENE 1,2,4 TMH 1,3 5-TMB XYLENES Methanol Ethanol NOTES Only compounds which were detected are shown on this table (I)Samples taken on 12 19 95 were analyzed outside of their holding time 12-06-94 1 2-Dichloropropane was detected in wt Il MW-1(5 3 pgtL) 0208-95 1 2-Dichloropropane was detected in wt 11 MW-1(1 3 pg/L) 0621-95 l 2-Dichlompropane was detected in wt Us MW l(1 6 Ito)and MW4(1 3 pglL.), Methylene chloride was detected in wells MW 3(4 8 Ag(L)and MW4(2 4 pg/L.) 03 11 96 Chloroform was detected in wells MW-I(3 7 pe) MW 5(3 0 ItglL) and MW-6(l 3 Vg/L) 06-1996 1 2 Dichloroproparie was detected in w<11 MW l(1 2 pg/L:) 12-05 96 Chloroform was detected in well MW-1(2 6 pg/L) 12 1097 Chloroform was detected in wills MW-I(1 6 pg/L)and MW 5(1 2 pg/L) 09 1698 12 Dichloropropane was detected in we[Is MW 1(l 2 pg/L)and VEW 5(3 4 pglL) 09 16 98 ti-Isopropyl toluene sNas detected in well,MW 1(1 5 gg/L) VEW-0(8 4 pg/L) and VEW-5(6 2 pg/L) 09 1699 p-Isopropyltoluene was detected in well MW-2(I 1 pg/L) 09/19/00 Tetrachloroethane was detected in well JAW-18(1 4 pg/l,) p-isopropyltoluene was detected in well MW-19D(1 i pg/L) Several wells contained methylene chloride,a laboratory contaminant 12/13/00 Methylene chloride a laboratory contaminant was detected in well MW 13(25 0 gg/L) Several wells contained chloroform in low concentrations, The chloroform is believed to be derived from the tap water used to decontaminate the pump and hose system 09/25/01 Tetrachloroethene was detected in wells MW-27(4 1 pg/L)and MW 18(1 6 pg/L) p-Isopropyltoluene was detected in well MW-8D©45'(25 pg/kg) 09/22/02 Tertiary Butyl Alcohol was detected in wells MW-3(70 pg/L) MW4(19 pg/L) MW 14A(5 6 pg/L),MW-25S(37 pg(L) and MW-25D(38 pg/L) Chloroform was detected in well MW 1(3 0 pg/L)and Tetrachloroetheoe was detected in wells MW 18 (0 85 pg/L) MW-21 S(0 58 pg/L) and MW-27(2 3 pg/L) 12/03/02 p-Isopropyltoluene(19pg/L)and Styrene(1 5 pg/L)were detected in well MW i l Vinyl chloride was detected in well MW 17(2 6 pg/L) 1 etrachloroethene was detected in wells MW 18(0 92 pg/L) MW-23D(0 82 pg/L) AS 26(0 65 pg/L)and MW-27(4 1 pg/L) Trichloroethene was detected in well IVIW 27(1 8 pg/L) <=Not detected at or above concenti-Lbon limit listed NA=Not Analyzed 1,2 4 TMB=12 4 Trimelhylbenzene 12-DCA=1 2 Dichloroethane 13 5-TM13=13 5 Trimethylbenzene DTW=Depth to Water EB=Ethylbenzene IPB—lsopropylbenzene MTBE=Methyl rerliary Butyl Ether N BUTYL=n Butylbenzene N-PB=n Propylbenzene NA=Not AnalyzedlNot Accessible NAPHT=Naphthalene ND=Not Detected NS=Not Sampled sec-BB =sec Butylbenzene TP1I-G=Total Petroleum Hydrocarbons as Gasoline N 1232 ANALYTICAL-DATA 1232 ANAL)TICAGIrATA Page 25 of 25 ENVIRONMENT AL AUDIT,INC