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• a r <br /> TABLE 1 <br /> Groundwater Monitoring Data <br /> Former Beacon Station No 12419 <br /> 2354 Waterloo Road, Stockton, California <br /> ethyl- Depth to TOC GW <br /> Well TPHg benzene toluene benzene xylenes MTBE DIPS ETBE TAME TBA methanol ethanol EDC EDB GW Elevation Elevation <br /> Number Date I (ug1L) (ugll-) (ug1L) (uglL) (uglL) (ug1L) (uglL) (ug1L) (ug1L) (ug1L) (uglL) (u IL) (ug/L) (uglL) (feet) (feet sea level)(feet sea level) Comments <br /> MWA 03131/98 65 <0 50 <0 50 <0 50 <0 50 <50 na na na na na na na na 4804 21 11 -2693 <br /> screened 06/10/98 <50 <0 50 <0 50 <0 50 <0 50 <50 na na na na na na na na 4260 -2139 <br /> interval 09/08/98 230 81 058 <0 50 072 <0 50 <0 50 <0 50 <0 50 17 <50 <5 0 na na 4695 -2584 no odor 1 no sheen <br /> 65 -85' 11112198 2036 wellhead survey <br /> 12/30/98 87 <0 50 <0 50 <0 50 <0 50 <5 0 na na na na na na na na 4533 -2497 no odor I no sheen <br /> 03/26199 55 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <50 <50 <10 na na 41 16 -2080 no odor I no sheen <br /> 06/02/99 180 74 <0 50 051 <0 50 <0 50 <0 50 <0 50 <0 50 <50 <50 <5 0 78 <0 50 4064 -2028 no odor I no sheen <br /> 08/31/99 260 <0 50 <0 50 051 <0 50 <0 50 <0 50 <0 50 <0 50 16 <50 <5 0 130 <0 50 4546 -2510 no comment <br /> 12/09/99 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <5 0 59 <0 50 4695 -2659 <br /> 02/21/00 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <5 0 17 <0 50 4526 -2490 no odor 1 no sheen <br /> 05118/00 <50 <0 50 27 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <5 0 na na 3968 -1932 no odor I no sheen <br /> 09/26/00 <50 <0 50 <0 50 <0 50 <0 50 <5 0 na na na na na na na na 4876 -2840 no odor I no sheen <br /> 12/20/00 <50 <0 50 <0 50 <0 50 <0 50 <50 na na na na na na na na 5 -2699 no odor I no sheen <br /> MW-2 03/31/98 94 <0 50 <0 50 <0 50 <0 50 <50 na na na na na na na na 4826 21 35 -2691 <br /> screened 06110198 <50 <0 50 <0 50 <0 50 <0 50 <5 0 na na na na na na ria na 4267 -21 32 <br /> interval 09108/98 98 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 24 <50 <5 0 na na 4731 -2596 no odor 1 no sheen <br /> 65'-85' 11/12/98 2059 wellhead survey <br /> 12/30/98 84 <0 50 <0 50 <0 50 <0 50 <5 0 na na na na na na na na 4555 -2496 no odor I no sheen <br /> 03126/99 78 <0 50 <0 50 <0 50 <2 0 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <20 na na 41 25 -2066 no odor 1 no sheen <br /> 06102/99 120 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 97 <50 <5 0 160 <0 50 4075 -2016 no odor 1 no sheen <br /> 08/31/99 79 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 74 <50 <50 65 <0 50 4572 -2513 no comment <br /> 12109199 <50 <0 50 <0 50 <0 50 <0 50 15 <0 50 <0 50 <0 50 <5 0 <50 <5 0 42 <0 50 4720 -2661 <br /> 02121/00 <50 <0 50 <0 50 <0 50 <0 50 1 <0 50 <0 50 <0 50 <50 <50 <5 0 30 <0 50 4552 -2493 no odor 1 no sheen <br /> 05/18/00 67 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <5 0 na na 4076 -2017 no odor 1 no sheen <br /> 09126/00 <50 <0 50 <0 50 <0 50 <0 50 <5 0 na na na na na na na na 4913 2854 no odor 1 no sheen <br /> 12/20/00 <50 <0 50 <0 50 <0 50 <0 50 <50 na na na na na na na na 4735 -2676 no odor I no sheen <br /> 00 As <br /> 1419419 4141 Page 1 of 6 HORIZON ENVIRONMENTAL INC <br />