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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 TPI-Ig benzene toluene benzene xylenes MTBE DIPE ETBE TAME TBA methanol ethanol :EDC EDB GW Elevation Elevation
<br /> Number Date (uglL) (uglL) (uglL) (ug1L) (ug1L) (uglL) (uglL) (ugll-) (uglL) (uglL) (uglL) (ug1L) glL)(ugIL (feet) (feet msl) (feet msl) Comments
<br /> MW-3 03/31198 72 10,50 10.50 '0.50 10,50 15.0 no na no no na na no no 61.53 25.54---73-5 99
<br /> screened 06110/98 ns ns ns ns ns ns ns ns ns ns ns ns no no 58.85 -33.31 no comment
<br /> Interval 09108/98 ns ns ns ns ns ns ns ns ns ns ns ns no na 58.94 -33.40 no comment
<br /> 75'-90' 12130/98 ns ns ns ns ns ns ns ns ns ns ns ns no no 56,96 -31.42 no comment
<br /> 03125199 73 10.50 10,50 10.50 '0.50 10,50 <0-50 x0.50 10.50 <5,0 '50 <5-0 no no 55-01 -29.47 no comment
<br /> 06103/99 65 10.50 10.50 <0-50 10.50 10.50 10.50 <0.50 <0.50 <5,0 150 <50 88 10.50 54.39 -28.65 no comment
<br /> o8130199 '50 10,50 10.50 10.50 10.50 1D.50 <0,50 10.50 <0.50 15,0 '50 15.0 80 10.50 56.61 -31.07 no Comment
<br /> 12/10199 51 10.50 '0.50 10.50 10.50 10.50 10.50 10,50 10.50 <5-0 150 15.0 60 10,50 56.47 -30.93 no Comment
<br /> 03!03100 <50 <0-50 <D.5D <0.50 10.50 5-0 10.50 <0.50 10.50 15,0 150 15.0 32 <0.50 55.39 -29,85 no ododno sheen
<br /> 06/22100 <50 10.50 10,50 10.50 10,50 10.50 10.50 10.50 '0-50 '5.0 150 21 18 <0-50 54.32 -28.78 no ododno sheen
<br /> 09!28100 150 <0,50 10.50 10.50 10,50 '5.0 no na na no na no na na 56.71 -31.17 no odcdno sheen
<br /> 12!21100 150 10.50 <0-50 10.50 <0.50 '5.0 no na no no no no no no 55,77 -30.23 no odor/no sheen
<br /> 03/28101 150 <D.50 0.55 <0.50 <D.50 15.0 na no ra na na na no no 54.85 -29.31 no ododno sheen
<br /> 06127/01 <50 10.50 10,50 10,50 10.50 10,50 '0-50 <0.50 10.5D 15.0 150 <5-0 11 10.50 56-45 -30.91 noodor/no sheen
<br /> 09106/01 150 10.50 10,50 10.50 0.63 <5.0 no no no na no no no na 58.49 -32,95 no ododno sheen
<br /> 12103101 150 '0.50 0.54 10.50 <0.5G 15,0 na no no no na no no no 58,92 -33.38 no ododno sheen
<br /> 03101102 150 '0-50 0.63 10.50 10.50 <5.0 no na na na na na na na 57.72 -32.18 no odor/no sheen
<br /> 0520102 <50 10.50 0.54 10.50 <0,50 10.50 10.50 <0.50 '0.50 <5.0 150 '5.0 1.9 <0.50 58.04 27,52 -30.52 no ododno sheen
<br /> 0829102 150 10.50 '0.50 <0.50 <0.50 <5.0 na na na no no na no na 61.92 -34.40 no odor/no sheen
<br /> 12106/02 230 19 24 5.2 33 10.50 na na no no na no na no 61.23 -33.71 odor/no sheen
<br /> 0=7103 160 <050 10.50 <0.50 10.50 15.0 no no na na no no no no 60.40 -32.88 ododno sheen
<br /> 06/03/03 <50 10.50 10.50 <0-50 10.50 <0-50 10.50 10.50 10.50 15,0 150 15.0 10.50 1050 59.17 -31.65 ododno sheen
<br /> 0828!03 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm not sampled
<br /> MW-4 03/31/98 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm 25.15 nm not located
<br /> screened 06/10198 ns ns ns ns ns ns rs ns ns ns ns ns ns ns nm nm not located
<br /> Interval 09/08/98 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm notlorated
<br /> 65'-86' 12130/98 ns ns ns ns ns ns ns ns ns ns ns ns ns nc - nm nm paved over
<br /> 0325!99. ns ns ns _ ns ns ns ns ns ns ns ns ns ns ns nm nm pavedover
<br /> 08130/99 ns ns ns ns ns ns ns ns ns ns ns ns ns nsnm nm paved over
<br /> 12110/99 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm paved over
<br /> 03/03100 ns ns ns rs ns ns ns ns ns ns ns ns ns ns nm nm paved over
<br /> 0622!00 ns ns ns ns ns ns ns ns ns ns rs ns ns ns nm nm paved over
<br /> 0928100 150 10.50 10.50 <0.50 10,50 15.0 no na na no na no na na 56.16 -31-01 noodorinosheen
<br /> 1221100 150 10.50 <0-50 10.50 10.50 15.0 no na no na no no no no 55.28 -30.13 no odor/no sheen
<br /> 03128/01 <50 1.1 5.8 0.93 4.5 15.0 na no no na no no na no 54.41 -29.26 - no ododno sheen
<br /> 06/27/01 150 <0,50 10.50 <0,50 <0.50 <0,50 10.50 <0.50 10.50 <5.0 <50 15.0 <0.50 <0.50 55.90 -30.75 noodorinosheen
<br /> 09/06/01 150 10.50 0.76 10.50 1.6 15.0 no. no no na na. na no na 57,97 -32,82 no odor/no sheen
<br /> 12/03101 150 <0.50 0.57 '9.50 10.50 <5,0 no no no no no no ra no 58.57 -33-42 no Odor/no sheen
<br /> 03101/02 <50 <0.50 '0.50 10.50 <0-50 '5.0 no na no no no no no no 57.29 -32.14 no odor/no sheen
<br /> 0520102 150 10.50 <0.50 10.50 <D-50 10.50 10.50 <0-50 <0 50 15.0 150 15.0 10.50 <0.50 57.55 27.13 -30.42 no ododno sheen
<br /> 08129102 <50 10.50 <D.50 10.50 0.51 15.0 na na no no na no na no 60.53 -33.40 no odor/no sheen
<br /> 12106/02 '50 10.50 0.54 10.50 10,50 10,50 no na na no no na no no 6075 -33.62 no ododno sheen
<br /> 03105103 1800 10,50 0.68 <0-50 10.50 15.0 na no no na no no no no 59.62 -32.69 no ododno sheen
<br /> 06103103 2300 '0.50 10.50 '0.50 10.50 <0 50 <0.50 10.50 10.50 <5-0 150 15.0 4.5 <0,50 58.93 -31.80 no odor/no sheen
<br /> 08129103 150 <0-50 <0.50 10,50 10.50 <5,0 na no na no no na no na 61,00 -33,87 noodadnosheen
<br /> 474gm,Dp,I%
<br /> Project No 1474 a Page 2 of 8 HORIZON ENVIRONMENTAL INC.
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