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i • • <br /> TABLE 1 <br /> GROUNDWATER MONITORING DATA <br /> Beacon Station No.12474 <br /> 3440 East Main Street Stockton,California <br /> i <br /> ethyl- total Depth to TOC GW <br /> Well TPiig benzene toluene benzene xylenes MTBE DIPS ETBE TAME TBA methanol ethanol EDC EDB GW Elevation Elevation <br /> Number Date (uglL} (uglL) {uglL} {ug1L} (ug/L} (uglL) (ug (uglL) (ug/L) (ug/L) (ug/L) (ug1L) (ug/L) (ug/L) (feet) (feet msl) (feet msl} Comments <br /> VW-7 03/31/98 c50 <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 <W <0.50 <0.50 <0.50 <0.50 <5.0 na na na na na na 59.04 <br /> Interval 09!08/98 <SO <0.50 <0.50 <D.SO <0.50 <0.50 c0.50 <p.5p <O,SO <5.6 <50 <5.0 -33.38 no odor l no sheen <br /> 56'-76' 12/30198 <50 c 59.19 -33.53 no odor 1 no sheen <br /> 0.50 <D.50 <0.5D <0.50 <5.0 na na na na na na 57.18 -31.52 no odor 1 no sheen <br /> 03125!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 <br /> 06/03/99 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 < -29.41 no comment <br /> 08/30/99 <50 < 5 0 5.6 <0,50 54.61 -28.95 no comment <br /> 0.50 <0.50 <0.50 <p.50 <0.50 <0.50 <0.50 <0.50 <5.p <50 <5.0 2.1 <0.5o 56.85 -31.19 no comment <br /> 12/10199 <50 <0.50 <0.50 <0,50 <0.50 0.50 <0.50 <0.50 <0.50 <5.2 <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 <0.50 <5.0 <50 <5.0 5.0 <0.50 55.61 <br /> 06/26/00 <50 <0.50 <0.50 <0.50 c -2995 no odorino sheen <br /> 0.50 <5.0 <0.50 <na c0.50 <5.0 <SO 9.4 4.0 <0.50 54.62 28.96 no odorino sheen <br /> 09/28/00 <50 <0,50 <0.50 <0.50 <0.50 <5.0 na na na na na na na na 56.83 <br /> 10/20/00 ns rts ns ns ns ns ns ns ns ns ns -31.27 no odor/no sheen <br /> ns ns ns nm 24.73 nm wellhead re-surveyed <br /> 12122)00 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm <br /> r03131198 <br /> 73 6.2 17 1.5 7.5 < nm no odor/no sheen <br /> 5.0 ns ns ns ns ns ns ns ns 54.73 -29.07 no odor/no sheen <br /> 14t1N 8 100 <0.50 <D.50 <050 <0.5p <5.0 na na na na na nascreened 60 D.9 <O.SD <0.50 <0.50 <5.0 na na na na na na fi1.5t 25.6835.83 reported as MW-3A <br /> interval 79 0.57 <D.50 <0.50 <0.50 <0.50 <0.50 <0.50 < 58.86 33.18 reported as MW 3A <br /> 0.50 <5.0 <50 <5.p58.97 33.29 slight odor1 no sheen <br /> 56'-76' 51 2.4 0.69 <0.50 <0.50 <5.D na nana na na na 57.13<So < -31.45 slight odor/no sheen <br /> 0.50 <0.50 <0,50 <0.50 <0.50 <0.50 <0.50 c0.50 <5.D <60 <5.0 55.09 -29.41 no comment <br /> <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 <br /> 08/30/99 <50 0.67 <0.50 <0.50 <0.50 c0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 <0.50 <0,50 56.60 -30.92 no comment <br /> 12/10/99 330 <0.50 <0.50 <0.50 <0.50 c0.50 <0.50 <0.50 <0.50 5.1 <50 <10 0.51 <0.50 56.57 30.92 no comment <br /> 03/03/00 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 c0.50 <0.50 <5.0 <50 <5 0 < -30.89 no comment <br /> 06/22/00 <50 < 0.52 <0.50 55.28 -29.60 no odorino sheen <br /> 0.50 <D.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 <So <0.50 <0.50 <0.50 <0.50 <5.0 na na na na na na na na 56.75 <br /> 12121/00 <50 <0.50 <0.50 <0.50 <0.50 <5.0 na na na na na na na na 55.92 -31'27 no odor/no sheen <br /> 03/28/01 <50 <0.50 1.4 <0.50 1.1 < -30.24 nodor/no sheen <br /> 5.0 na na na na na na na na 54.98 -29,32 no <br /> odorino sheen <br /> MYY-9 03/31/98 <50 <0.50 <0.50 <0.50 <0.50 <5.0 na na nana na na <br /> screened 06/10/98 66 <0.50 <0.50 <0.50 <0.50 <5.0 na na na na na na <br /> 62.$S91 26'58 -36,01 reported as MW-1A <br /> Interval 09108/98 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <� 59.99 <br /> .91 -33.33 reported as MW-1A <br /> 56'-76' 12/30/98 <50 <0.50 <0.50 <0.50 <0.50 <0.50 na na na na na na 8. -33.41 no odor!no sheen <br /> 5 <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 01 -31.43 na odor 1 sheen <br /> 566.01.02 29,44 n0 comment <br /> 06/03/99 92 <0.50 <0.50 1.0 5.7 <0.50 c0,50 <0.52 c0.50 <5.0 c50 <5.0 5.3 <0.50 55.43 -28.85 no Comment <br /> 08/31199 58 <0.50 <0.50 <0.50 <0.50 <0.52 c0,50 <0.50 <0.50 <5.0 <50 <5.0 0.66 <0.50 57.68 <br /> 12/10/99 140 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 0.81 <0.5D 57.49 31'10 no comment <br /> 03/03/00 75 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 c0.50 <0.50 <5.0 <50 <5.0 2.99 <D.50 56.54 30'91 no comment <br /> 06/26100 73 <0.5D <0.50 <0.50 <0.50 <0,50 <0.50 <0.50 <0,50 <5.0 <50 10 < -28.96 no odor/no sheen <br /> 09128100 <50 <0,50 <D.So <0.50 <0.50 <5.0 na na na na na na 0.52 <na 55.41 -28.63 no odor/no sheen <br /> na na 57.74 -31.18 no odor/no sheen <br /> 12/22/00 210 <0.50 <O.SD c0.50 <0.50 c5.0 na na na na na na na na 56.89 30.31 no odor/no sheen <br /> 03/28/01 142 2.9 14 1.4 6,1 <5.0 na na na na na na na na 55.91 <br /> -29.33 no odor/no sheen <br /> I' <br /> 474Wn=.,ds <br /> Proud No.1474.44 Page 3 of 5 HORIZON FiMMONMENTAL ERC. <br /> r <br />