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SL <br /> 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 /> Number Date u IL u ) u u (U ) feet feet sea level feet sea level) Comments <br /> MW-4 03131198 75 <0 50 <0 50 <0 50 <0 50 4792 2000 -2792 <br /> (screened 06110/98 58 <0 50 <0 50 <0 50 <0 50 4221 2221 <br /> Interval= 09/08198 50 13 14 <0 50 24 4664 2664 no odor I no sheen <br /> 48' 7(Y) 11112/98 2000 Wellhead Survey Data <br /> 12!30)98 68 14 087 <0 50 1 1 4500 2500 no odor I no sheen <br /> 03/26/99 74 <0 50 <0 50 <0 50 <0 50 4075 -2075 no odor I no sheen <br /> 06102619 <50 <0 50 <0 50 <0 50 <0 50 4019 -2019 no odor/no sheen <br /> 08/31199 <60 <0 50 <0 50 <0 50 <0 50 4509 -2509 no comment <br /> 12/09/99 <50 <0 50 <0 50 <0 50 <0 50 4656 2656 <br /> 02121100 68 <0 50 <0 50 <0 50 <0 50 4494 2494 no odor/no sheen <br /> 05/18/00 62 <0 50 <0 50 <0 50 <0 50 3923 1923 no odor 1 no sheen <br /> MW-6 03/31/98 75 <0 50 <0 50 <0 50 <0 50 4846 2043 -2803 <br /> (screened 06/10/98 <50 <0 50 <0 50 <0 50 <0 50 4272 2229 <br /> interval= 09/08/98 <50 12 091 <0 50 094 4692 -2649 no odor I no sheen <br /> 48' 71') 11/12/98 2043 Wellhead Survey Data <br /> 12/30/98 110 067 <0 50 <0 50 <0 50 4545 2502 no odor/no sheen <br /> 03/26199 67 <0 50 <0 50 <0 50 <0 50 4126 2083 no odor I no sheen <br /> 06/02199 <50 <0 50 <0 50 <0 50 <0 50 4061 2018 no odor I no sheen <br /> 011131/99 <50 <0 50 <0 50 <0 50 <0 50 4549 2506 no comment <br /> 12/09199 140 <0 50 <0 50 <0 50 <0 50 4704 -2661 <br /> 02121100 140 <0 50 <0 50 <0 50 <0 50 4547 -2504 no odor 1 no sheen <br /> 05/18/00 <100 <1 0 0 0 <1 0 <1 0 4071 2028 no odor/no sheen <br /> MW4 03/31198 110 <0 50 <0 50 <0 50 <0 50 4836 2066 2770 <br /> (screened 06/10/98 79 <0 50 <0 50 <0 50 <0 50 4268 2202 <br /> interval= 09/08/98 <50 086 077 <0 50 <0 50 4697 2631 no odor 1 no sheen <br /> 48' 715') 12/02198 2065 Wellhead Survey Data <br /> 12/30/98 53 <0 50 <0 50 <0 50 <0 50 4557 2492 no odor/no sheen <br /> 03/26199 84 <0 50 <0 50 <0 50 <0 50 4125 2060 no odor 1 no sheen <br /> 06/02/99 59 <0 50 <0 50 <0 50 <0 50 4071 2006 no odor 1 no sheen <br /> 08131199 63 <0 50 <0 50 <0 50 <0 50 4557 2492 no comment <br /> 12/09199 <50 <0 50 <0 50 <0 50 <0 50 4729 2664 <br /> 020100 690 29 120 20 87 4569 2504 no odor 1 no sheen <br /> 05/18/00 <50 <0 50 23 <0 50 <0 50 4084 2019 no odor 1 no sheen <br /> 419prc00g2jW Page 2 of 4 HORIZON ENVIRONMENTAL INC <br /> 41941 <br />