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i <br /> TABLE 1 <br /> GROUNDWATER MONITORING DATA <br /> ` Beacon Station No.12474 <br /> f 3440 East Main Street,Stockton,California <br /> ethyl- total Depth to TQC GW <br /> Weil TPHg benzene toluene benzene xylenes MTBE RIPE ETBE TAME TBA methanol ethanol EDC EDB GW Elevation Elevation <br /> Number Date (ug1L) (ug1L) (ug1L) (ug1L) (ug1L) (ug1L) (ug1L) (ug1L) (ug1L) (ug1L) (ug1L) (ug1L) (ug1L) uglL (feet) (feet mal) (feet mel) Comments <br /> Kw-7 03131/96 <50 <0.50 <0.50 40.50 <0.50 <5.0 na no no no no no 61.75 25,66 -36.09 <br /> screened 0671098• <50 <0.50 <0.50 <0.$0 <0.50 <5.0 no no na no na no 59.04 33.38 no odor!no sheen <br /> Interval 09x08/98 <5D <0,50 40.50 10,50 <0150 <0.50 <0-50 <0.50 <0.50 <5.0 <50 <5,0 59.18 33.53 rloodwlnosheen <br /> 58'•76' t2l3p198 450 <0,50 10.50 <0.50 <0.50 <5.0 na no no no no no 57.18 -31.52 no odor 1 no sheen <br /> 0325199 <50 <0.50 40.50 <0.50 <0.50 <0.50 40.50 <0,50 <0,50 <5.0 <50 <5.0 55.07 -29.41 no comment <br /> 013/03199 <60 <0.50 <0.50 40.50 40.50 40.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 5.6 <0.50 54.61 -28.95 no comment <br /> 08!30199 <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 cornmeal <br /> 12/101x99 <50 40.50 <0,50 40.50 40.50 0.50 40.50 <0.50 <0.50 <5.0 <50 <5.0 4.7 <0.50 56.68 31.D2 no oomrrlenl <br /> 03103100 <50 40.50 40.50 40.50 40.50 0.62 <0.50 <0.50 <0.50 <5.0 <50 <5.0 5.0 <0.50 55.61 -29.95 no odorino sheen <br /> 06/26100 <50 <0.50 <0.50 <0.50 <0.50 40.50 <0.50 <0.50 40.50 <5.0 450 9.4 4.0 <0.50 54.62 -28.98 no odorino sheen <br /> 09/2a= 450 40.50 <0.50 <0.50 40.50 45.0 no no no no na no no no 56.93 -31.27 no odorfio sheen <br /> 1020100 ns as ns ns as ns as ns ns as ns ns as ns nm 24.73 nm wellhead re-surveyed <br /> 1222/00 no n3 ns ns ns ns ns ns ns ns ns ns as ns nm nm no odorino sheen <br /> 032801 73 6,2 17 1.5 7.5 <5.0 ns ns ns as ns ns ns ns 54.73 .30.00 no odor/no sheen <br /> 06127101 <50 <0.50 1.0 <0.50 40.50 0.67 <0.50 <0.50 40.50 <5.0 450 <5.0 6.0 <0.50 55.99 -31.26 no odor/no sheen <br /> 09/06101 <50 <0.50 <0.50 <0.50 <0.50 <5.0 no no no na no no no no 58.03 -31.26 no odor/no sheen <br /> W& 03/31/98 100 <0.50 40.50 <0.50 <0.50 45.0 no no no no no no 61.51 25.66 -35.83 reported as MW-3A- <br /> screened 06/10Ai8 80 0.9 <0,50 <0.50 <0.50 <5.0 no no no no no no 58.86 -33.18 reported as MW-3A <br /> interval 09/08196 79 0.57 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 45.0 <50 <5.0 58.97 -33.29 slight odor!no sheen <br /> 56'-76' 12MOM 51 2.4 0.69 <0.50 <0.50 45.0 no no no no no no 57.13 31.45 slight odor/no sham <br /> 032599 <50 <0,50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 $5.09 -29.41 no comment <br /> 06103/98 <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 54.42 -28.74 no continent <br /> 06!30!99 450 0.67 10.50 40.50 <0.50 <0.50 40.50 40.50 <0.50 <5.0 450 <5.0 <0.50 <0.50 56.60 -30.92 no cornrrlenl <br /> 12!10!99 330 <0.50 <0.50 <0S0 <0.50 <0,50 <0.50 <0.50 <0.50 5.1 <50 <10 0.51 40.50 56.57 -30.89 no cormrlent <br /> 03/03/00 <50 <0.50 40.50 10.50 <0.50 <0.50 <0.50 40.50 <0.50 <5.0 450 <5.0 <0.50 <0.50 55.28 -29.60 no odor/no sheen <br /> D622/00 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0,50 40.50 <5.0 <50 12 0.63 <0.50 54.37 -28.69 no ododno sheen <br /> 0912800 <50 40.50 <0,50 <0.50 <0.50 <5.0 no no no no no na no no 56.75 -31.07 no odor/no sheen <br /> 1212100 450 40.50 <0.50 40,50 <0.50 <50 no no no no no no no no 55.92 -30,24 no ododno sheen <br /> 0328101 <50 <0.50 1.4 <0.50 1.1 <5,0 no no no no no no no no 54.98 _29.30 no odor/no sheen <br /> 06/27/01 150 <0.50 <0.50 10.50 40.50 <0.50 <0,50 <0.50 <0.50 7.6 <50 <5.0 <0.50 <0.50 56.57 -30.89 no ododno sheen <br /> 090601 <50 <0.50 <0.50 40.50 <0.50 <5.0 no na no no no no no no 58.46 -32.78 no vdorino sheen <br /> MW-9 03131!98 <50 <0.50 <0.50 <0.50 <0.50 <5.0 no no na no no no 62.59 26.56 -36.01 reported as MYW1A <br /> screened 06110198 66 <0,50 <0.50 40.50 <0.50 <5.0 no na no no no na 59.91 -33.33 reported as MW-1A <br /> Interval 0908198 c50 <br /> <050 <0.50 40.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 59.99 -33.41 no odor/no sheen <br /> 56'-76' 12/3096 450 <0.50 <0.50 <0.50 <0.50 <0.50 no no no no no no 58.01 -31.43 no odor!no sheen <br /> 03/15/99 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 40.50 <0.50 <5.0 <50 <5.0 56.02 -29.44 no comment <br /> 06/03199 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 1 no comment <br /> 08r3Dh19 58 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 cD.50 <0.50 <5.0 <50 45.0 0,66 <0.50 57.88 31.10 no conuner3t <br /> 12110/99 140 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 450 <5.0 0.81 <0.50 57.49 30.91 no comment <br /> 0303/00 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 -20.83 no odorfio sheen <br /> 092600 450 40.50 40.50 <0.50 40.50 <5.0 no no no no no no na no 57.74 -31,16 nooderMosheen <br /> 12/22/00 210 <0.50 <0.50 40.50 40,50 <5.0 no no no no no no na no 56.69 -30.31 no odor/no sheen <br /> 0312&107 140 2.9 14 1.4 6-1 45.0 no no no no no no no na 55.91 -29,33 no odor/no sheen <br /> 062701 200 40.50 0.81 <0.50 40.50 <0.50 <0.50 40.50 <0.50 45.0 450 45.0 40.50 40.50 57.47 -30.89 no odorMo sheen <br /> 090601 120 40.50 <0.50 <0.50 <0.50 <5.0 no no no no no no no no 59.52 -32.94 no odor/no sheen <br /> 474Wr4O,x% <br /> Pr*d Nb.1474A4 Page 3 of 6 HORIZON ENVIRONMENTAL INC. <br />