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TABLE I HISTORICAL GROUND WATER ANALYTICAL TESTING RESULTS 5400 and 5606 Pacific Avenue,Stockton,California concentration in pg/L ]Sample ID I DTN� _I_TPH C I BENZENE sec-BB I n-BUTYI I 11-DCA I EB I IPB I i1ITBE NAPHT n-PB TOLUENE 1 1,1,4 TNi6 1 1,3,5 TNIB XYI ENLS tllethauol Ethanol NOTES Only compounds which were detected are shown om this table (1)Samples taken on 12 19 95 is ere analyzed outside of their holding ante 12 06 94 12 Dtchloropropane was detected in well MW l(5 3 Vg/L) 02-08-95 1 2 Dtchloropropane was detected in well MW l(1 3 pWL) 06-21 95 12 Dtchloropropane n as detected to wells MW 1(1 6 pg/L)and MW 4(1 3 pg/L) Methylene chloride was detected in wells MW-3(4 8 pg/L)and MW 4(2 4 pg/L) 03-1 t 96 Chloroform was detected in wells MW-l(3 7 pg/L) M W 5(3 0 pg/L) and MW-6(1 3 pg/L) 06-1996 1,2 Dichloropropinevas detected in well MW 1(1 2 pg/L) 12 05 96 Chloroform was detected in well MW l(2 6 pg/L) 12-10-97 Chloroform was detected to wells MW I(1 6 pg/L)and MW 5(1 2 pg/L) 09-1698 12 Dtchloropropane was detected to wells MW-1(1 2 pg'L)and VFW 5(3 4 pg/L) 09-1698 p Isopropyhotuene was detected in well MW I(1 5 pg/L) VEW 4(8 4 pgiL) 'Ind VEW-5(62 pg/L) 09-1699 p-lsopropyltoluene was detected in tcell MW 2(l 1 pg/L) 09/19 00 Tetrachloroetliene was detected in well MW 18(l 4 pg/L p isopropyltaluene 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 NIW l3(25 0 pg/L), Several hells contained chloroform to low concentraltons The chtorofotm is believed to be denvi d from the tap water used to decontaminate the pump and base 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 wt 11 MW-8D a 45'(25 pgikg) 09/22/02 7 ertiary Butyl Ah,ohol was detected to wells MW 3(70 pg/L) MW 4(19 pg L) MW-14A(5 6 pg/L) MW 25S(37 pg/L) and MW-25D(38 pg/L) Chloroform was detected to well MW 1(3 0 pg/L)and'I etrachloroethene was detected in wells MW t8 (0 85 pg/L) MW 215(0 58 pg/L) and MW 27(2 3 pg/L) 12/03/02 p-Isopropvltoluene(19pg/L)and Styrene(1 5 pg/L)were detected in well MW I 1 Vinyl chloride w as detected in well MN-17(2 6 pg/L) Tetrachloroethene was detected to 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) Trtchloroelhene was detected in well MW 27(1 8 pg/1) 02/18/03 Tetrachloroethene was detected in a ells 10W 18(0 75 pg1L) MW 2l S(0 95pg/L) and MW 27(3 7 p&'L) p Isopropyltoluene was detected mwells MW 16(1 I pg/L)and MW-25D(2 9 pg/L) and Trichloroethene(1 4 pg/L)was detected in well MW-27 05/06/03 Chloromethane(3 3 pg/L) and 1 I dtehloroelhane(0 64 pg/L) were detected in well MW-I p-isopotpyltoluene was detected to wells MW I(1 2 pg/L) MW 4(7 0 pg/L) MW 6(5 9 pg/L),MW I 1(1 4 pg'L) MW 24S(0 85 pgfL) and MW-25D(4 2 pg/L) Tetrachloroethene was also detected to wells MW 21 S(0 85 jig/L)and MW 27(4 6 pg/L) Trichloroethene was detected in well MW-27(1 6 pg/L) <=Not detected at or above concentration Itmtt listed 12 4 TMB=1,2 4 rrimethylbenzene 12 DCA=l 2-Dt0loructhane 1 3 5 TMB=1,3 5 Trimethylbenzene DTW-Depth to Water EB=Ethylbenzene 1P13=Isoprop)(benzene MTBE=Methyl Tertiary Butyl lather N BUTYL=n But}(benzene N PB=n Propylberzene NA=Not Analyzed/Not Accessible NM =Not Measured NAPHT=Naphthalene ND=Not Lh iected NS=Not Sampled sec-BB=sea Butylbenzene TPH G=Total Petroleum Hydrocarbons as Gasoline N 1232 ANALYTICAL DATA 1212 ANALYTICAL DATA Page 27 of 27 ENVIRONMENTAL AUDIT,INC,