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<br /> 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 TPHg benzene toluene benzene xylenes MTBE D1PE ETBE TAME TBA methanol ethanol EDC EDB GW Elevation Elevation
<br /> Number Date (uglL) (u IL) (u91L) (ug1L) (ug1L) (uglL) (uglt.) (uglL) (uglL) (uglL) (uglL) (uglL) (uglL)(uglL (feet) (feet msl) (feet msl) Comments
<br /> MW-7 03!31!98 <50 40.50 40.50 40.50 40.50 45.0 na no no no no no no no 61.75 25.66 -36,09
<br /> screened 06110198 <50 <0.50 <030 <0.50 <0.50 <5.0 no no no na no no na no 59.04 -33,38 no odor I no sheen
<br /> Interval 09108/98 <50 40.50 40.50 40.50 40.50 40.50 40.50 40,50 40.50 45.0 450 45,0 no na 59.19 -33.53 no odor f no sheen
<br /> 56'-76' 12/30/98 <50 <0.50 <0.50 <0,50 <0.50 <5.0 no no no no no no na no 57.18 -31.52 no odor!no sheen
<br /> 03!25199 450 40.50 40.50 40,50 40,50 40.50 40.50 <0.50 <0-50 45.0 450 <5-0 no no 55.07 -29.41 no comment
<br /> 06!03199 450 <0.50 <0,50 <0.50 <0.50 <0.50 <0.50 <D 5D 40.50 45.0 450 45.0 5.6 40,50 54.61 -28.95 no comment
<br /> 08!30199 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <MD <5A <50 <5.0 2.1 <030 56.85 -31.19 no comment
<br /> 12110199 <50 <0.50 <0,50 <0.50 <0.50 0.50 <0.50 40.50 <0.5D <5.0 <50 <5.0 4.7 <0 50 56.68 -31.02 no comment
<br /> 03103100 <50 <0.50 <0.50 <0.50 <0.50 0.62 <0.50 <0,50 <D.50 <5.0 <50 <5.0 5.0 <0,50 55.61 -29.95 noodorhwsheen
<br /> 0626100 450 40.50 4030 40.50 40.50 <0,50 <0.50 40-50 <0-50 -50 450 9.4 4.0 40.50 54.62 -28,96 no odor/no sheen
<br /> 09QBm0 450 40.50 <0.50 <0.50 40.50 45.0 no no no no no no no no 56.93 -31.27 no odorino sheen
<br /> 10!20/00 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm 24.73 nm wellhead re-surveyed
<br /> 12/22/00 ns ns ns ns ns no ns ns ns ns ns ns ns ns nm nm no odorino sheen
<br /> 03!28101 73 6.2 17 1.5 7.5 45.0 ns ns ns ns ns ns ns ns 54.73 -30.00 no odortno sheen
<br /> 0627)01 <50 <0,50 1.0 <0.50 <0,50 0.87 <0.50 <0.50 <0.50 <5.0 <50 <5.0 6.0 <0.50 55.99 -31.26 no odor/no sheen
<br /> 09106101 <50 <0,50 <0.50 40.50 40.50 45,0 no no no no no no no no 58.03 -33.30 no odorino sheen
<br /> 12103101 <50 40.50 40.50 40.56 40.50 <5A no no na na no no no no 58AI -33.68 no ododno sheen
<br /> 0228102 <50 40.50 <0.5D <0.50 40.50 <5.0 no na na no no na no no 57.13 -32.40 no odor/no sheen
<br /> 0520)02 51 40.50 1.9 <0.50 <0.50 0.92 40.50 <0.50 <0.50 <5.0 450 <5.0 15 <D.50 57.55 26.94 -30.6t no odor/no sheen
<br /> 0829X12 <50 <0.50 40.50 <0.50 40.50 <50 na na na na no no no na 60.63 -33.69 no odor/no sheen
<br /> 12106!02 <50 <0.50 <0-50 40.50 <0-50 0.96 no no na no no na no na 60.74 -33,80 no odorh7o sheen
<br /> 03/05/03 450 40.50 40,50 40.50 40.50 45.0 no na no no na na no no 59.71 -3277 no ododno sheen
<br /> 06N3/03 2400 40.50 40.50 40.50 <O.SD 40.50 40.50 40.50 40.50 45.0 450 45.0 4.7 <0.50 50.64 -31,70 no odorino sheen
<br /> 0828103 <50 <0.50 <0.50 <0.50 <0.50 <5.0 no no na no no na no na 61.04 -34.10 no odorino sheen
<br /> 11125/03 63 <0.50 <0.50 <0.50 <0.50 0.63 na no na na no no no na 61.79 -34$5 no odorino sheen
<br /> 03mi104 <50 40.50 1.3 <0.50 0.54 0.87 <0.50 <0.50 <0.50 45.0 <50 <5.0 9.1 <0.50 60,47 -33.53 no odorhto sheen
<br /> MW-8 03731198 100 40.50 40.50 40.50 40.50 45.0 no no no no no na no no 61.51 25.68 -35.83 reported as MW-3A
<br /> screened 0(110!98 80 0.9 <0.50 <0.50 <0.50 <5.0 as na na na na na na na 58.86 -33.18 reported as MW-3A
<br /> Interval 09108!98 79 0.57 40.50 40.50 40.50 4050 40.50 <0-50 40.50 <5-0 <50 45.0 no no 58.97 -33.29 slight odor!no sheen
<br /> 56'-76' 1280198 51 2.4 0.69 40,50 40.50 45.0 no no no na na no no no 57.13 -31.45 slight odor 7 no sheen
<br /> 0325199 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0,50 <0.50 <0.50 <5.0 <50 <5.0 no na 5509 -29 41 no comment
<br /> 06103199 <50 <0.50 <0.50 <0,50 40.50 <0.50 <0.50 40.50 <0.50 45.0 <50 45.0 40.50 <0-50 5442 -28174 no comment
<br /> 0&30199 <50 0.67 <0,50 <0.50 <0.50 <0.50 <050 <0.50 <0.50 <5.0 <50 <5.0 <0,50 <0.50 5660 -30,92 no comment
<br /> 12/10M 330 <0.50 <0,50 <0.50 40.50 40.50 <0.50 <0,50 <0.50 5.1 450 410 0.51 40.50 56.57 -30.89 no comment
<br /> 03103100 450 40.50 40,50 40.50 40.50 40.50 40,50 40.50 40,50 45,0 450 450 40.50 <0-50 55,28 -29.60 no odorino sheen
<br /> 0622!00 450 <0 so <0.50 <0.50 <0.50 <0.50 <0.5D <0.50 <0.50 <5,0 <50 12 0.63 <0.50 54,37 -28,69 no odor/no sheen
<br /> 0926100 <50 <0.50 <0.50 <0.50 <0.50 450 na na na na no no no no 56.75 31,07 no odor/no sheen
<br /> 12211'00 450 <0.50 <0.50 40.50 40.50 45.0 no no na no no no na na 55.92 -30.24 no odor/no sheen
<br /> 0326m1 450 <0.50 1.4 <0.50 1.1 <5.0 na no na na na na na na 54.98 -29.30 no odorino sheen
<br /> 0627101 <50 <0.50 <0.50 <0.50 <0.50 <0.51) <0.50 <0.50 <0.50 7.6 <50 45.0 <0.50 <0.50 56.57 -30.89 no odorh7a sheen
<br /> 09)08101 450 40.50 40.50 40.50 <0.50 <5-0 no no no no no na na na 58.46 -32.78 no odorino sheen
<br /> 12103101 130 40.50 40.50 40.50 40.50 <5.0 no no na no no na no no 59.02 -33.34 no odorino sheen
<br /> 02!26!02 85 <0.50 40.50 <0.50 <0.50 <5.0 no no na no no na na no 57.65 -32,17 no o "Ma sheen
<br /> 0520/02 140 <0.W <0.50 <0.50 <0.50 40.50 40.50 <0.50 40.50 45.0 450 45.0 40.50 40.50 58.11 27.64 •30,47 no ododno sheen
<br /> 0829102 <50 40.50 40.50 40.50 <0.50 <5.0 no no no no no no no no 61,14 •33.50 no odor/no sheen
<br /> 12106102 160 8.9 13 3.4 21 <0.50 no no no na na no na na 61.33 -33.69 odorfm sheen
<br /> 03107103 1100 0,90 4.9 40.50 2.5 <5.0 no no no na no no na no 60.77 -33.13 odorhlo sheen
<br /> 06/03103 260 <0.50 <0.50 <0.50 <0.50 40.50 <0.50 <0.50 <0.50 <5.0 <50 450 Q.0 <0.50 59,01 -31.37 odorh7o sheen
<br /> 0828M3 <50 <0.50 40.50 40,50 40.50 45.0 no no no no no no no no 61.59 -33.95 no odor/no sheen
<br /> 1125103 <50 40.50 40.50 40.50 40.50 <0.50 no no na no no no no na 62,40 34.76 no odor/ho sheen
<br /> 03101104 <50 <0.50 <0.50 <0,50 <0.50 <0.50 <030 <0.50 <0.50 <5.0 <50 <50 <0.50 <0.50 61,06 -33.42 odor/no sheen
<br /> 474q.Project
<br /> 40,14 Page 4 of 9 HORIZON ENVIRONMENTAL INC.
<br /> ProKd No.747411
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