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GROUND WATER ANALYTICAL RESULTS C-10 Beacon Station No 695 900 South Cherokee Lane Lodi, California Concentration in parts per billion (ppb) Well Date Ethyl- Total No Collected Benzene Toluene benzene Xylenes TPHa Lead EDBb Comments MW-24 I I122/88 <0 6 <04 <04 <06 <2 NAe NA 03/14/89 <04 <04 <06 1 1 18 NA NA 06/19/89 3 2 <04 <05 <2 5 7 NA NA 09/14/89 <0 5 <04 <05 <1 <5 NA NA 12/14/89 <0 5 052 <05 <2 6 1 NA NA 031=90 <07 <06 1 8 <2 9 1 NA NA 06/07/90 <0 5 <05 <06 <2 <5 NA NA 10/09/90 2 6 <05 <05 0 8 <50 NA NA 12/18/90 <05 <05 <05 <0 5 <50 NA NA 06/19191 <05 <05 <05 <0 5 <50 NA NA 09/20/91 <0 5 <05 <05 <05 <50 NA NA 12/31/91 <05 <05 <05 <0 5 <50 NA NA 03/04/92 <0 5 <05 <0 5 <0 5 <50 NA NA MW-25 11/22/88 44 1 8 14 <1 140 NA NA 03/14/89 3 1 <04 1 7 1 6 210 NA NA 06/19/89 25 <04 <05 <2 52 NA NA 09/14/89 <05 <04 3 5 <1 1,400 NA NA 12/14189 86 <05 2 3 <2 360 NA NA 03122190 17 06/07/90 <05 <05 27 3 3 800 NA NA 10109190 NRA 12/18190 Dry 06/19/91 <05 96 7 2 24 3,600 NA NA 09/20/91 Dig 12/31/91 NR 03/04/92 <05 <0 5 0 9 1 6 250 NA NA MW-27 06/19/91 Not Sampled 06/28/91 280 140 15 160 5,200 NA NA 09/20/91 46 23 15 67 820 NA NA 12/31/91 210 37 4 3 110 5,000 NA NA 03/04/92 16 12 0 9 15 530 NA NA RW-1 06/19/91 Not Sampled 06/28/91 14 <05 <05 26 200 NA NA 09/21/91 6 3 2 6 <05 42 220 NA NA 12/31/91 <05 0 6 <05 09 <50 NA NA 03/04/92 <05 <05 <0 5 <0 5 <50 NA NA a Total petroleum hydrocarbon as gasoline b Ethylene dibromide c Ethylbenzene concentration included in xylenes concentration and not reported individually d Xylene concentration includes cthylbenzene e Not analyzed f Not detected, detection limit unknown g No recharge after purging well, ground water sample could not be collected Note Ground water samples prior to June 19, 1991, not collected by Delta • LRP 102 HMB