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I TABLE t GROUNDWATER MONITORING DATA 11 Former Beacon Station No 12419 l 23 750 Waterloo Road,Stockton,California if ethyl Depth to TOC GW Well TPHg benzene toluene benzene xyienes MTBE DIPE ETRE TAME TBA methanol ethanol OCA EDB GW Elevation Elevation Number Date (u IL) u IL) (ug/L (ug/L (ug/L (u 7L') (u IL) (ug/L (u 7L) (ug/LJ (ug/L u 1L) (u 1L) u IL (feet) feet sea level (feet sea level) Comments MW-4 03!31!98 75 <0 50 <0 50 <0 50 <0 50 <5 0 na' na' na na na na na na 4792 2000 2792 # screened 06!10198 58 <0 50 <0 50 <0 50 <0 50 <5 0 na i nail na na na na na na 4221 2221 interval 09108198 50 13 14 <0 50 24 <0 50 <0 5!0 <0 50 <0 50 <5 0 <50 <50 na na 4664 2664 no odor I no sheen 48-70 11/12/98 ns ns ns ns ns ns 1� nsl ns l ns ns ns ns ns ns 2000 wellhead survey 12)30!98 68 14 087 <0 50 11 <5 4, nal nal na na na na na na 4500 2500 no odor 1 no sheen 03126/99 74 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <50 <50 <20 na na 4075 2075 no odor 1 no sheen 06102/99 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <60 <50 <5 0 32 <0 50 4019 2019 no odor 7 no sheen 08131/99 <50 <0 50 <0 50 <0 50 <0 50 <050 <0 50 <o 50 <0 50 <50 <50 <5 0 43 <0 50 4509 2509 no comment 12/09/99 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 69 <50 <5 0 49 <0 50 4656 2656 02!21100 68 <0 50 <050 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <50 <50 <50 30 <0 50 4494 -2494 no odor 1 no sheen { 05/18100 62 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <050 <5 0 <50 <5 0 na na 3923 -1923 no odor I no sheen I 09726100 <50 <0 50 <0 50 <0 50 <050 <5 0 nal na na na na na na na 4855 , -2855 no odor I no sheen 12/20/00 <50 <0 50 <0 50 <0$0 <050 <50 nal nal na na na na na na 4698 -2698 no odor I no sheen 03127/01 <50 <0 50 <0 50 <0 50 <0 50 <5 0 ne na na na na na na na 4571 2571 no odor I no sheen 06/26/01 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <5 0 <50 -50 <0 50 <0 50 4840 2840 no odor 7 no sheen 09105/01 <50 <0 50 <0 50 <0 50 <0 50 <5 0 nall na na na na na na na 53 55 3355 no odor 7 no sheen 11/30/01 <50 <0 50 <0 50 <0 50 <0 50 <5 0 nanal na na na na na na 5339 3339 no odor I no sheen 02127/02 <50 <050 <0 50 <0 50 <0 50 <5 0 nal na na na na na na na 5009 3009 no odor I no sheen 05/16/02 <50 <0 50 <0 50 <0 50 <050 <0 50 <0 50 <0 50 -050 <5 0 <50 <5 0 43 <0 50 .5027 2156 2871 no odor 7 no sheen 09/12/02 <50 <0 50 <0 50 <0 50 <0 50 <56 nal nal na na na na na na 5846 -3690 no odor 1 no sheen 12!04102 <50 <0 50 <0 50 <0 50 -<0 50 <5 0 nal na na na as na na na 5650 -35 04 no odor I no sheen g 02117703 110 <0 50 <0 50 <0 50 <0 50 <0 50 naE na, na na na na na na 5344 3188 no odor 1 no sheen i 06102703 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <D 50 <5 0 <50 <5 0 74 <0 50 5284 31 28 no odor I no sheen 09718/03 ns ns ns ns ns ns nsns ns ns ns ns ns ns nm nm not sampled 11/24103 <50 <0 50 <0 50 <0 50 <0 50 <0 5!0 na na na na na na na na 5791 3635 no odor 7 no sheen r l 02!23104 60 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <5 0 59 <0 50 5436 -3280 no odor I no sheen 06707104 ns ns ns ns ns nsj! ns ns ns ns ns ns AS ns 5463 3307 not sampled 09/07/04 ns ns ns ns ns ns i ns ns ns ns ns ns ns ns 6139 3983 not sampled 12710104 ns ns ns ns ns ns it ns ns ns ns ns ns ns ns 5884 -3728 not sampled , 03/08105 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <50 <50 <5 0 31 <0 50 5525 3369 no odor 1 no sheen 05/24/05 ns ns ns ns ns ns I; ns ns ns ns ns ns ns ns 5034 2878 not sampled � I � I i a,aum os Ki Pag�3 HORIZON ENVIRONMO INC II II