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Tat <br /> Groundwater <br /> � <br /> Table 1 <br /> Groundwater Monitoring Data <br /> Former Beacon Station No 419 <br /> 2350 Waterloo Road,Stockton,California <br /> Well Date TPHg Benzene Toluene E-benzene Xylenes Depth to TOC GW <br /> Humber ug/L ug/L ug/L ug/L ug/L GW Elevation Elevation Comments <br /> MW-1 03/31/98 65 <0 50 <0 50 <0 50 <0 50 4804 2111 -2693 <br /> (screened 06/10/98 <50 <0 50 <0 50 <0 50 <0 50 4250 -2139 <br /> interval= 09/08/98 230 8 1 058 <0 50 0 72 4695 -2584 no odor 1 no sheen <br /> 65'-855 11/12/98 20.36 Wellhead Survey Data <br /> 12/30/98 87 <0 50 <0 50 <0 50 <0 50 4533 -2497 no odor I no sheen <br /> 03/26/99 55 <0 50 <0 50 <0 50 <0 50 41 16 -2080 no odor/no sheen <br /> 06/02/99 180 74 <0 50 051 <0 50 4064 -2028 no odor 1 no sheen <br /> 08/31/99 260 <0 50 <0 50 051 <0 50 4546 -25 10 no comment <br /> 12/09/99 <50 <0 50 <0 50 <0 50 <0 50 4695 -2659 <br /> MW-2 03/31/98 94 <0 50 <0 50 <0 50 <0 50 4826 21.35 -2691 <br /> (screened 06/10/98 <50 <0 50 <0 50 <0 50 <0 50 4267 -2132 <br /> interval= 09/08/98 98 <0 50 <0 50 <0 50 <0 50 4731 -2596 no odor 1 no sheen <br /> 65'-85'} 11/12/98 2059 Wellhead Survey Data <br /> 12/30/98 84 <0 50 <0 50 <0 50 <0 50 45 55 -2496 no odor/no sheen <br /> 03/26/99 78 <0 50 <0 50 <0 50 <2 0 4125 -2066 no odor/no sheen <br /> 06/02/99 120 <0 50 <0 50 <0 50 <0 50 4075 -2016 no odor/no sheen <br /> 08/31/99 79 <0 50 <0 50 <0 50 <0 50 45 72 -25 13 no comment <br /> 12/09/99 <50 <0 50 <0 50 <0 50 <0 50 4720 -26 61 <br /> MW-3 03/31/98 780 22 2 0 3 2 7 0 4827 21.38 -26 89 <br /> (screened 06/10/98 220 26 18 0 6 18 4267 -2129 <br /> interval= 09/08/98 3,800 420 180 260 280 4721 -25 83 Petroleum odor/no sheen <br /> 65'-85') 11/12/98 2065 Wellhead Survey Data <br /> 12/30/98 620 18 099 17 14 4556 -24 91 slight odor/no sheen <br /> 03/26/99 63 <0 50 <0 50 <0 50 <0 50 4126 -2061 slight odor/no sheen <br /> 06/02/99 74 17 13 23 0 78 4076 -2011 slight odor/no sheen <br /> 08/31/99 3,000 270 120 260 250 4570 -2505 no comment <br /> 12/09/99 <50 17 <0 50 <0 50 <0 50 4722 -2657 <br /> MW4 03/31/98 75 <0 50 <0 50 <0 50 <0 50 4792 2000 -2792 <br /> (screened 06/10/98 58 <0 50 <0 50 <0 50 <0 50 4221 -22 21 <br /> interval- 09/08/98 50 13 14 <0 50 24 46 64 -2664 no odor/no sheen <br /> 48'-70) 11/12/98 2000 Wellhead Survey Data <br /> 12/30/98 68 14 0 87 <0 50 1 1 45 00 -2500 no odor 1 no sheen <br /> 03/26/99 74 <0 50 <0 50 <0 50 <0 50 4075 -2075 no odor/no sheen <br /> 06/02/99 <50 <0 50 <0 50 <0 50 <050 4019 -2019 no odor/no sheen <br /> 08/31/99 <50 <0 50 <0 50 <0 50 <0 50 45 09 -2509 no comment <br /> 12/09/99 <50 <0 50 <0 50 <0 50 <0 50 4656 -26 56 <br /> 1 <br /> 99QMTeble Q4 Page 1 of 3 HORIZON ENVIRONMENTAL IRC <br />