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TABLE 1 <br /> Groundwater Monitoring Data <br /> Former Beacon Station No 419 <br /> 2350 Waterloo Road,Stockton,California <br /> Depth to TOC GW <br /> Well TPHg Benzene Toluene Ethylbenzene Xylenes GW Elevation Elevation <br /> Nuu (um ( } (feet) (feet sea level feet sea level) 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)08198 230 81 058 <o 50 072 4695 -2584 no odor I no sheen <br /> 65' 85'} 11/12198 2036 Wellhead Survey Data <br /> 12/30/98 87 <0 50 <0 50 <0 50 <0 50 4533 24 97 no odor 1 no sheen <br /> 03126199 55 <0 50 <0 50 <0 50 <0 50 41 16 -2080 no odor 1 no sheen <br /> 06/02/99 180 74 <0 50 0 51 <0 50 40 64 2028 no odor I no sheen <br /> 08131199 260 <0 50 <0 50 0 51 <0 50 45 46 2510 no comment <br /> 12/09/99 <50 <0 50 <0 50 <0 50 <0 50 46 95 2669 <br /> 02121100 <50 <0 50 <0 50 <0 50 <0 50 4526 2490 no odor 1 no sheen <br /> 05/18100 <50 <G 50 2 7 <0 50 <0 50 39 68 1932 no odor 1 no sheen <br /> MW-2 03/31/98 94 <0 50 <0 50 <o 50 <0 50 48 26 2135 2691 <br /> (screened 06/10198 <50 <0 50 <0 50 CO 50 <0 50 4267 21 32 <br /> interval= 09)08/98 98 <0 50 <0 50 <0 50 <0 50 4731 -25 96 no odor 1 no sheen <br /> 65'-85) 11112198 2059 Wellhead Survey Data <br /> 12/30198 84 <0 50 <0 50 <0 50 <0 50 45 55 2496 no odor I no sheen <br /> 03126199 78 <0 50 4050 <0 50 <2 0 4125 2066 no odor I no sheen <br /> MOMS 120 <0 50 <0 50 <0 50 <0 50 40 75 2016 no odor I no sheen <br /> 08131/99 79 <0 50 10 50 <0 50 <0 50 4572 2513 no comment <br /> 12/09199 <50 <0 50 <0 50 <0 50 <0 50 4720 26 61 <br /> 02/21/00 <50 <0 50 <0 50 <0 60 <0 50 45 52 2493 no odor I no sheen <br /> 05!18/00 67 <0 50 <0 50 <0 50 <0 50 4076 2017 no odor 1 no sheen <br /> MW-3 03/31198 780 22 2 32 7 4827 2138 2689 <br /> (screened 06/10/98 220 2 6 18 0 56 1 8 4267 -2129 <br /> interval= 09108/98 3800 420 180 260 280 4721 25 83 Petroleum odor I no sheen <br /> 65' 85) 11112/98 2065 Wellhead Survey Data <br /> 12130/98 620 18 0 99 17 14 4556 2491 slight odor 1 no sheen <br /> 03126199 63 <0 50 <0 50 <0 50 <0 50 4126 2061 slight odor 1 no sheen <br /> 06/02199 74 1 7 13 23 078 4076 2011 slight odor I no sheen <br /> 08131199 3000 270 120 260 250 4570 2505 no comment <br /> 12109)99 <50 17 <0 50 <0 50 <0 50 4722 26 57 <br /> 02121100 1600 160 35G 43 140 4569 2504 slight odor 1 no sheen <br /> 05/18/00 <50 <0 50 <0 50 <0 50 <G 50 4087 20 22 no odor!no sheen <br /> 4194woog2* Page 1 or 4 HORIZON ENVIRONMENTAL INC <br /> 41941 <br />