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TABLE 1 <br /> GROUNDWATER MONITORING DATA <br /> Beacon Station No. 3641 <br /> 1210 E. Hammer Lane, Stockton, California <br /> ethyl- Depth to TOC GW <br /> Well TPHg benzene toluene benzene xylenes MTBE DIPE ETBE TAME TBA methanol ethanol DCA EDB GW Elevation Elevation <br /> Number Date (ug/1) (ug/1) (ug/1) (ug/9 09/1) u 11 (u11)( (ug/1) (ug/1) u A (ug/1) (ug/1) (ug/1) (u/l feet feet msl feet msl Comments <br /> MW-4 1012197 35000 9300 600 1100 3600 1800 <5.0 <5.0 <5.0 <500 <50000 <10000 na na 57.45 100.00 42.55 no sheen,no odor <br /> screened 3131/98 2000 14 3.9 <0.50 7.5 <50 na na na na, na na na na 49.72 50.28 no sheen,slight odor <br /> interval 6110/98 2400 6 1.2 <0.50 1.1 12 na na na na na na na na 46.63 53.37 no sheen,slight odor <br /> 50'-75' 918198 660 2.9 1 4.8 <0.50 120 <0.50 <0.50 <0.50 11 230 <5.0 na na 49.87 50.13 no sheen,no odor <br /> 12/30/98 180 <0.50 0.88 <0.50 1.2 28 na na na na na na na na 44.56 55.44 no sheen,no odor <br /> 3125199 80 <0.50 <0.50 <0.50 <0.50 8 <0.50 <0.50 <0.50 5.6 <50 <5.0 na na 41.94 58.06 no sheen,no odor <br /> 612199 160 <0.50 <0.50 <0.50 <0.50 41 <0.50 <0.50 <0.50 25 <50 <5.0 <0.50 <0.50 42.90 57.10 no sheen,no odor <br /> 8131199 460 8.6 <0.50 0.85 <0.50 540 <0.50 <0.50 <0.50 40 <50 <5.0 <0.50 <0.50 48.39 51.61 no comment <br /> 1219/99 <50 <0.50 <0.50 <0.50 <0.50 440 <0.50 <0.50 <0.50 24 <50 <5.0 <0.50 <0.50 45.46 54.54 no comment <br /> 311/00 100 <0.50 <0.50 <0.50 <0.50 110 <0.50 <0.50 <0.50 13 <500 <5.0 na na 42.98 57.02 no comment <br /> 6/6/00 200 <0.50 <0.50 <0.50 <0.50 62 <0.50 <0.50 <0,50 33 <200 <5.0 <0.50 <0.50 42.53 57.47 clear <br /> 9114100 120 0.73 <0.50 <0.50 <0.50 1100 <0.50 <0.50 2.2 70 <700 <5.0 <0.50 <0.50 48.58 51.42 clear <br /> 12/12/00 <50 <0.50 <0.50 <0.50 <0.50 420 na na na na na na na na 44.33 55.67 clear <br /> 3119101 <50 <0.50 <0.50 <0.50 <0.50 140 na na na na na na na na 41.85 58.15 clear <br /> 6/19101 60 <0.50 <0.50 <0.50 <0.50 220 na na na na na na na na 45.65 54.35 clear <br /> 9127/01 <100 <1.0 <1.0 <1,0 <1.0 350 na na na na na na na na 50.62 49.38 clear <br /> 12/13/01 52 <0.50 <0.50 <0.50 <0.50 320 na na na na na na na na 46.87 53.13 clear <br /> 3128/02 <50 <0.50 <0.50 <0.50 <0.50 56 na na na na na na na n� 43.55 19.97 -23.58 clear <br /> 6/19102 81 <0.50 <0.50 <0.50 <0.50 84 na na na na na na na na 46.21 -26.24 clear <br /> 9116/02 <100 <1.0 <1.0 <1.0 <1.0 260 <1.0 <1.0 <1.0 18 <100 <10 <1.0 <1.0 51.16 -31.19 clear <br /> 12/26/02 <50 <0.50 <0.50 <0.50 <0.50 65 na na na na na na na na 47.83 -27.86 clear <br /> 3/26103 <50 <0.50 <0.50 <0.50 <0.50 27 na na na na na na na na 45.58 -25.61 clear <br /> 6127103 <50 <0.50 <0.50 <0.50 <0.50 42 <0.50 <0.50 <0.50 <5.0 <50 <5.0 <0.50 na 48.30 -28.33 clear <br /> 9/19103 150 3.2 <0.50 9.7 <0.50 390 na na na na na na na na 54,75 -34.78 clear <br /> 12/30/03 <50 <0.50 <0.50 <0.50 <0.50 96 na na na na na na na na 50.15 -30.18 clear <br /> 3/26104 <50 <0.50 <0.50 <0.50 <0.50 39 <0.50 <0,50 <0.50 <5.0 <50 <5.0 <0.50 na 47.88 -27.91 clear <br /> 6117104 <50 <0.50 <0.50 <0.50 <0.50 67 <0.50 <0.50 <0.50 18 <200 <5.0 <0.50 na 52.11 -32.14 clear <br /> 919104 <50 0.84 <0.50 <0.50 <0.50 320 <0.50 <0.50 <0,50 20 <500 <5.0 <0.50 na 57.17 -37.20 clear <br /> 12/16/04 <50 <0.50 <0.50 <0.50 <0.50 94 na na na na na na na na 53.54 -33.57 clear <br /> 3/3105 <50 <0.50 <0.50 <0.50 <0.50 21 <0.50 <0.50 <0.50 <5.0 <50 <5.0 <0,50 na 50.14 -30.17 clear <br /> 6116105 <50 <0.50 <0.50 <0.50 <0.50 17 na na na na na na na na 49.90 -29.93 clear <br /> 8129105 <50 <0.50 <0.50 <0.50 <0.50 120 na na na na na na na na 54.72 -34,75 clear <br /> 12/29/05 <50 <0.50 <0.50 <0.50 <0.50 14 na na na na na na na na 48.95 -28.98 clear <br /> 641gmr <br /> Project No.1641.48 Page 4 of 13 HORIZON ENVIRONMENTAL INC. <br />