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r <br /> Tab <br /> Groundwater Monitoring Data <br /> Former Beacon Station No 419 <br /> 2350 Waterloo Road,Stockton,California <br /> Well Date TPHg Benzene Toluene E-benune Xylenes Depth to TOC GW <br /> Number ug1L ug/L ug/L ug/L ug/L GW Elevation Elevation Comments <br /> MW-5 03/31/98 75 <0 50 <0 50 <0 50 <0 50 4846 2043 -2F03 <br /> (screened 06/10/98 <50 <0 50 <0 50 <0 50 <0 50 4272 -2229 <br /> interval- 09/08/98 <50 1 2 0 91 <0 50 0 94 4692 -2649 no odor/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 /> 03/26/99 67 <0 50 <0 50 <0 50 <0 50 4126 -2083 no odor/no sheen <br /> 06/02/99 <50 <0 50 <0 50 <0 50 <0 50 4061 -20 18 no odor/no sheen <br /> 08/31/99 <50 <0 50 <0 50 <0 50 <0 50 4549 -2506 no comment <br /> 12/09/99 140 <0 50 <0 50 <0 50 <0 50 47 04 -2661 <br /> MW-6 03/31/98 110 <0 50 <0 50 <0 50 <0 50 4836 20 66 -2770 <br /> (screened 06/10/98 79 <0 50 <0 50 <0 50 <0 50 4268 -22 02 <br /> 1rltorval- 09/08/98 <50 0 86 077 <0 50 <0 50 4697 -2631 no odor/no sheen <br /> 49'-715) 12/02/98 2065 Wellhead Survey Data <br /> 12/30/98 53 <0 50 <0 50 <0 50 <0 50 4557 -2492 no odor/no sheen <br /> 03/26/99 84 <0 50 <0 50 <0 50 <0 50 4125 -20 60 no odor/no sheen <br /> 06/02/99 59 <0 50 <0 50 <0 50 <0 50 4071 -2006 no odor/no sheen <br /> 08/31/99 63 <0 50 <0 50 <0 50 <0 50 45 57 -2492 no comment <br /> 12/09/99 <50 <0 50 <0 50 <0 50 <0 50 4729 -26 64 <br /> MW-7 11/12/98 20 55 Wellhead Survey Data <br /> (screened 12/30/98 340 48 10 74 2 2 4543 -2488 no odor/no sheen <br /> interval- 03/26/99 550 94 <0 50 <0 50 <0 50 4133 -2078 no odor/no sheen <br /> 41'-661 06/02/99 230 <0 50 <0 50 <0 50 <0 50 4076 -2021 no odor/no sheen <br /> 08/31/99 120 <0 50 <0 50 <0 50 <0 50 4556 -25 01 no comment <br /> 12/09/99 130 <0 50 <0 50 <0 50 <0 50 47 14 -2659 <br /> MW-8 11/12/98 20.38 Wellhead Survey Data <br /> (screened 12/30/98 68 12 0 76 <0 50 0 81 4536 -2499 no odor/no sheen <br /> interval W 03/26/99 58 <0 50 <0 50 <0 50 <0 50 4108 -2070 no odor/no sheen <br /> 4l'-66') 06/02/99 <50 <0 50 <0 50 <0 50 <0 50 40 52 -20 14 no odor/no sheen <br /> 08/31/99 <50 <0 50 <0 50 <0 50 <0 50 4544 -25 06 no comment <br /> 12/09/99 <50 <0 50 <0 50 <0 50 <0 50 4701 -2663 <br /> Wellhead Survey Data <br /> MW-9 11/12/98 20 65 <br /> (screened 12/30/98 1 500 73 18 160 64 45 59 -2494 slight odor/no sheen <br /> interval= 03/26/99 1,300 54 5 8 110 15 4139 -2074 no odor/no sheen <br /> 41'-66) 06/02/99 1,300 16 2 5 76 24 4074 -2009 no odor/no sheen <br /> 08131/99 2,400 140 2 1 460 280 45 62 -2497 no comment <br /> 12/09/99 1,600 86 6 5 200 62 4726 -2661 <br /> 99QMTable Q4 Page 2 of 3 HORIZON ERVIROMM ITAL INC <br />