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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 TPH9 benzene toluene benzene xylenes MTBE DIPE ETBE TAME TBA methanol ethanal EDC EDB GW Elevation Elevation <br /> Number Date u !L a IL u IL u 1L u 1L u !L u 1L u IL u 1L u 1L u !L u !L u !L u 1L feet feet msl (feetms) Comments <br /> MW-3 03131198 72 <0.50 c0-66--<O 50 <0.50 <5.0 na na na na na na na na 61.53 25.54 -35.99 <br /> screened 06!10!98 as ns ns ns ns ns ns ns ns ns ns ns na na 58.85 <br /> interval 09108198 ns ns as ns ns ns ns ns ns ns ns ns na na 58.94 -33.31 no comment <br /> 75'-90' 12!30!98 ns ns ns ns ns ns ns ns as as ns ns na na. 56.96 -33.40 no comment <br /> 03125199 73 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 na na -31.42 no comment <br /> 06103/99 65 <0.50 <0.50 <0.50 < 55.01 -28.47 no comment <br /> 0.50 <0.50 <D.50 <0.50 <0.50 <5.0 <50 <5.0 BB <0.50 54.39 <br /> 08130199 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0,50 <5.0 <50 <5-D 80 <0.50 56.61 -28'85 no comment <br /> 12/10/99 51 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0,50 <0.50 <5.0 <50 < -31-07 no comment <br /> 5.0 60 <0.50 5 .47 -30.93 no comment <br /> 03!03100 <50 <0.50 c0.50 <0,50 <050 5.0 c0.50 <0.50 <0.50 <5.0 <50 <5.0 32 c0,50 555.39 <br /> 06/22/00 <50 <0.50 <0.50 <0.50 <0 50 <0,50 <0.50 <0.50 <0.50 <5.0 <50 -29.85 no odor/no sheen <br /> 09/28/00 <50 <0,50 <0.50 <0.50 <0.50 <5.0 na na 21 18 c 54'32 -28.78 no odor/no sheen <br /> na na na na na nnaa 5 .71 -31.17 no odor/no sheen <br /> 12/21/00 <50 <0,50 <0.50 <0.50 <0.50 <5.0 na na na na na na na na 555,77 <br /> 03/28/01 c50 <0.50 0-55 <0.50 <0.50 <5.O na na na na na na na na 54.85 -30.23 no odor/no sheen <br /> 06127101 <50 <0.50 <0.50 <0,50 <0.50 <0.50 <0-50 <0,50 <0.50 <5.0 <50 <5 -29.31 no odor/no sheen <br /> .0 c 56.46 -30.91 no odor/no sheen <br /> 09106!01 <SD <0.50 <0.50 <0.50 0.63 <5.0 na na na na na na n na na na 58.49 <br /> 12103101 <50 <0.50 0.54 <0.50 <0.50 <5,0 na na na na na na na na 58.92 -32.95 no Odor/no sheen <br /> -33.38 no odor <br /> 03101102 <50 <0.50 0.63 <0.50 <0,50 <5,0 na na na na na na na na 57.72 no sheen <br /> 05/20/02 <50 <0.50 0.54 <0.50 <0.50 <0.50 <0.50 c0.50 <0.50 <5.0 <50 <5.0 1 -32.18 no odor/no sheen <br /> .9 < orino sheen <br /> na 56.04 27.52 -30.52 no ododor/no <br /> c50 <0.50 <D.50 c0.50 c0.50 <5.0 na na na na na na na na 61.92 <br /> 12/06/02 230 19 24 5.2 33 <0,50 na na na na 3440 no Morino sheen <br /> 0.50 <0,50 <5.0 na na 61'23 odor/no sheen <br /> 03/07/03 160 <0.50 <0.5D < na na na -33.71 <br /> na na na na na na 60.40 -32.88 odor/no sheen <br /> 06/03/03 <50 <0.50 <0.50 <0,50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.O <50 <5.0 <0.50 <0.50 59.17 <br /> -31.65 odor/no sheen <br /> MWS 03131198 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm 25.15 nm <br /> screened 06110!98 ns ns as as ns ns ns ns ns ns as ns as as nm not located <br /> interval 09!06!98 as ns Its ns ns ns ns as ns ns ns as ns ns nm nm not located <br /> 65'-86' 12/30/98 as ns ns ns as ns ns ns ns ns ns ns ns ns nm nm not d oved <br /> 03!25199 ns ns ns ns ns ns ns ns ns as ns ns ns ns nm nm paved over <br /> 08130!99 ns ns ns ns ns ns ns ns as ns ns ns ns ns nm nm paved over <br /> 12/10/99 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm paved over <br /> 03!03100 ns ns ns ns ns ns ns ns ns ns ns ns ns as nm nm paved over <br /> 06/22/00 ns ns ns ns ns ns ns ns ns ns as ns ns as nm nm paved over <br /> 09128100 <50 <0.50 <0.50 <0.50 <0.50 <5,0 na na na na na na na na 56.16 nm paved over <br /> 12121100 <50 c0.50 <0.50 <0.50 <0.50 <5.0 na na na na na -31.01 no odorino sheen <br /> 03128101 <50 1.1 5,8 0.93 4.5 <5.0 na na na na na na na na 55.28 -30.13 no odorino she�jQQ <br /> na na na 54.41 -29.26 no odorino sheen <br /> 06127/01 <50 <0.50 c0,50 <0.50 <0.50 <p,50 <0.50 <0.50 <0,50 <5.0 <50 c5.0 <0.50 <0.50 55.90 <br /> 09/06/01 <50 <0.50 0.76 <0.50 1.6 <5.0 na na na na na na na na 57.97 -30.75 a0 odOr/no sheen <br /> 12/03/01 <50 <0.50 0.57 <0.50 <0.50 <5.0 na na na na -32.82 no odorinsheen <br /> na na na na 58,57 -33.42 no odor/no sheen <br /> 03101102 <50 <0,50 c0.50 e0,50 <0.50 <5A na na na na na na na <br /> n 57.29 -32.14 no odor/nosheen <br /> 05=102 <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 57.55 27.13 -30.42 no odor/no sheen <br /> 08/29102 c50 <0.50 <0.50 <0.50 0,51 <5.0 na na na na na na na na 60.53 <br /> 12/06102 <5D <0.50 0.54 <0.50 <0.50 <0.50 na na -33.40 no odor/no sheen <br /> na na na na na na 60.75 -33.62 no odor/no sheen <br /> 03!05143 1800 <0.50 0.68 <0.50 <0.50 <5.0 na na na na na na na na 59.82 <br /> 06!03103 2300 <0.50 <0.50 <0.50 <0,50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 < -32.69 no odorino sheen <br /> 5.0 4.5 <p,5p 58.93 .31,80 no odorino sheen <br /> 474gmr0o.x4s <br /> Pmjed No,1474.4 Page 2 of B HORIZON&NVIRON <br /> PA[ENT/1I.INC. <br />