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TABLE 1 <br /> GROUNDWATER MONITORING DATA <br /> Beacon Station No. 12474 <br /> 3440 East Main Street,Stockton,California <br /> ethyl- total Depth to TOC GW <br /> Well TPHg benzene toluene benzenexylenes MTBE DIPE ETBE TAME TBA methanolethanol EDC EDB GW Elevation Elevation <br /> Number Date (ug/L _(91U_ (u 1L (u IL) (u 1L) (u !L) (ug/L (u 1L) (u 1L) (u 1L) u IL) (ug/L u 1L) (ug/L feet feet msl feet msl Comments <br /> MW-7 03/31/98 <50 <0.50 <0.50 <0.50 <0.50 <5.0 na na na na na na 61.75 25.66 -36.09 <br /> screened 06110198 <50 <0.50 <0.50 <0.50 <0.50 <5.0 na na na na na na 59.04 -33.38 no odor 1 no sheen <br /> interval 09/08198 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0,50 <0.50 <0.50 <5.0 <50 <5.0 59.19 -33.53 no odor!no sheen <br /> 56'-76' 12/30198 <50 <0.50 <0.50 <0.50 <0.50 <5.0 na na na na na na $7.18 -31.52 no odor I no sheen <br /> 03/25/99 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5,0 <50 <5.0 55.07 -29.41 no comment <br /> 06103199 <50 <0.50 <0.50 <0,50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 5.6 <0.50 54.61 -28.95 no comment <br /> 08130199 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 2.1 <0,50 56.85 -31.19 no comment <br /> 12110!99 <50 <0.50 <0.50 <0.50 <0.50 0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 4.7 <0.50 56.68 -31.02 no comment <br /> 03103/00 <50 <0.50 <0.50 <0.50 <0.50 0.62 <0.50 <0.50 <o.5o <5.0 <50 <5.0 5.0 <0.50 55.61 -29.95 no odorino sheen <br /> 06!26!00 <50 <0.50 <0,50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 9.4 4.0 <0.50 54.62 -28.96 no ododno sheen <br /> 09128!00 <50 <0.50 <0.5o <0.50 <0.50 <5.0 ne na na na na na na na 56.93 -31.27 no ododno sheen <br /> 12!22100 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm <br /> MW-8 03/31/98 100 1 <0.50 <0.50 <0.50 <0.50 <5.0 na na na na na na 61.51 25.68 -35.83 reported as MW-3A <br /> screened 06110198 80 0.9 <0.50 <0.50 <0.50 <5.0 na na na na na na 58.86 -33.18 reported as MW-3A <br /> interval 09/08/98 79 0.57 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 58.97 -33.29 slight odor/no sheen <br /> 56'-76' 12/30/98 51 2.4 0.69 <0.50 <0.50 <5.0 na na na na na na 57.13 -31.45 slight odor 1 no sheen <br /> 03/25/99 <50 <0.50 c0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 55.09 -29.41 no comment <br /> 06/03/99 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 <0,50 c0.50 54.42 28.74 no comment <br /> 08/30/99 <50 0.67 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 <0.50 <0,50 56.60 -30.92 no comment <br /> 12110199 330 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 5.1 <50 <10 0.51 <0.50 56.57 -30.89 no comment <br /> 03/03/00 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 <0.50 <0.50 55.28 -29.60 no odor/no sheen <br /> 06122!00 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 12 0.63 <0.50 54.37 -28.69 no odor/no sheen <br /> 09/28/00 <50 <0.50 <0.50 <0.50 <0.50 <5.0 na na na na na na na na 56.75 -31.07 no odortno sheen <br /> 12/21/00 <50 <0.50 <0.50 <0.50 <0.50 <5.0 na na na na na na na na 55.92 30.24 no odorino sheen <br /> MW-9 03/31/98 <50 <0.50 <0.50 <0.50 <0.50 <5.0 na na na na na na 62.59 26.58 -36.01 reported as MW-1A ! <br /> screened 06/10/98 66 <0.50 <0.50 <0.50 <0.50 <5.0 na na na na na na 59.91 -33.33 reported as MW-1A <br /> interval 09/08/98 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 59.99 -33.41 no odor f no sheen <br /> 56'-76' 12130!98 <50 <0.50 <0.50 <0.50 <0.50 <0.50 na na na na na na 58.01 -31.43 no odor 1 no sheen <br /> 03/25/99 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 56.02 -29.44 no comment <br /> 06103/99 92 <0.50 <0.50 1.0 5.7 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 5.3 <0.50 55.43 -28.85 no comment <br /> 08/30/99 58 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 0.66 <0,50 57.68 -31.10 no comment <br /> 12110199 140 <0.50 <0.5o <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5,0 <50 <5.0 0.81 <0.50 57.49 -30.91 no comment <br /> 03103!00 75 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 0.99 <0.50 56.54 29.96 no odorino sheen <br /> 06126100 73 <0.50 <0.50 <0.50 <0.50 <0,50 <0.50 <0.50 <0.50 <5.0 <50 10 <0.50 <0.50 55.41 -28.83 no odoT/no sheen <br /> 09/28/00 <50 <0.50 <0.50 <0.50 <0.50 <5.0 na na na na na na na na 57.74 -31.16 no odor/no sheen ! <br /> 12/22/00 210 <0.50 <0.50 <0.50 <0.50 <5.0 na na na na na na na na 56.89 -30.31 no odor/no sheen <br /> 474gmr00.xls <br /> 1474,43 Page 3 of 5 HORIZON ENVIRONMENTAL INC. <br />