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To 1 <br /> GROUNDWATER MONITORING DATA <br /> Former Beacon Station No 12419 <br /> 2350 Waterloo Road,Stockton, California <br /> ethyl- Depth to TOC GW <br /> Well TPHg benzene toluene benzene xylenes MTBE DIPE ETBE TAME TBA methanol ethanol DCA EDB GW Elevation Elevation <br /> Number Date (ug1L) (ug1L) (ug1L) (ug1L) (uglL) (uglL) (ug/L) (ug1L) (ug1L) (ug1L) (ug1L) (ug1L) (ug1L) (ug/L) (feet) (feet sea level) (feet sea level) Comments <br /> MW 9 11!12198 ns ns ns ns ns ns ns ns ns ns ns ns ns ns 2065 wellhead survey <br /> screened 12!30198 1500 73 18 160 64 <25 0 na na na na na na na na 4559 -2494 slight odor!no sheen <br /> interval 03!26199 1300 54 58 110 15 <0 50 <0 50 <0 50 <0 50 11 <50 <5 0 na na 41 39 -2074 no odor 1 no sheen <br /> 41' 66 06!02199 1300 16 25 76 24 <0 50 <0 50 <0 50 <0 50 13 <50 <5 0 16 <0 50 4074 -2009 no odor 1 no sheen <br /> 08!31199 2400 140 21 460 280 055 <0 50 <0 50 <0 50 93 <50 <5 0 42 <0 50 4562 -2497 no comment <br /> 12/09/99 1600 86 65 200 62 079 <0 50 <0 50 <0 50 10 <50 e50 1 3 <0 50 4726 -2661 <br /> 02/21/00 1900 50 18 100 60 055 <0 50 <0 50 <0 50 10 <50 88 95 <0 50 4581 -2516 slight odor 1 no sheen <br /> 05!18100 790 96 081 76 21 <0 50 <0 50 <0 50 <0 50 12 <50 <50 na na 4089 -2024 slight odor/no sheen <br /> 09!26100 680 1 1 <0 50 31 087 <5 0 na na na na na na na na 4895 -2830 slight odor 1 no sheen <br /> 12!21100 1400 16 1 1 40 120 <5 0 na na na na na na na na 4762 2697 slight odor 1 no sheen <br /> 03127/01 1700 61 14 23 220 <5 0 na na na na na na na na 4637 2572 slight odor 1 no sheen <br /> 06/26/01 390 51 065 44 27 <0 50 <0 50 <0 50 <0 50 85 <50 <5 0 68 <0 50 4899 2834 slight odor!no sheen <br /> 09105101 410 1 1 <0 50 <0 50 46 <5 0 na na na na na na na na 5411 -3346 no odor 1 no sheen <br /> 11/30101 750 72 14 31 15 <5 0 na na na na na na na na 5411 -3346 no odor/no sheen <br /> 02127102 850 12 35 14 23 <5 0 na na na na na na na na 5078 -3013 no odor!no sheen <br /> 05/16/02 1100 72 10 31 67 <0 50 <0 50 <0 50 <0 50 58 <50 <50 12 <0 50 5092 2221 -2871 no odor!no sheen <br /> 09/13102 2800 110 33 130 200 <5 0 na na na na na na na na 5908 -3687 slight odor 1 no sheen <br /> 12/04/02 980 31 15 21 39 <5 0 na na na na na na na na 5734 -3513 odor 1 no sheen <br /> 02/17/03 900 20 14 42 26 <0 50 na na na na na na na na 5408 31 87 no odor 1 no sheen <br /> 06103103 2800 140 17 130 120 <0 50 <0 50 <0 50 <0 50 58 <50 <50 15 <0 50 5347 3126 no odor 1 no sheen <br /> 09!18!03 2800 430 23 79 170 <50 na na na na na na na na 5991 3770 no odor 1 no sheen <br /> 11124!03 1800 190 27 19 76 <0 50 na na na na na na na na 5866 -3645 no odor 1 no sheen <br /> 02/23104 1200 40 075 77 59 <0 50 <0 50 <0 50 <0 50 67 <50 <5 0 26 <0 50 5515 -3294 odor 1 no sheen <br /> I <br /> 419gmr94 xis <br /> Pioject No 1419 47 Page 9 of 13 HORIZON ENVIRONMENTAL INC <br />