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TABLE 4
<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 DIPE ETRE TAME TBA methanol ethanol EDC EDB GW Elevation Elevation
<br /> Number Date (ug/L) (ug/L) (ug1L) (ug1L) (ug1L) (ug/Ll (ug/L) (ug1L) (ug1L) (ugll-) (ug1L) (ug1L) (ug1L) uglL (feet) (feet msl) (feet mist) Comments
<br /> MW-5 03/31/98 <50 -40.50 -40.50 <0,50 -40.50 <5.0 no no no no no no 61,11 25.11 -36.00
<br /> screened 06110198 <50 <0.50 <0.50 <0.50 <050 <5.0 na na na na na na 58.41 -33.30 noodor lnosheen
<br /> interval 09/08/98 <50 <0.50 <0.50 -40.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 58.41 -33.30 no odor l no sheen
<br /> 66'-86.5' 12130198 <50 <0.50 2.5 0.89 5.8 <5.0 no no na no na no 56.51 -31.40 no odor 1 no sheen
<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 54.54 -29.43 no comment
<br /> 06/03/99 <50 <0,50 -40.50 <0.50 <0,50 -0.50 <0.50 <0.50 <0.50 45.0 <50 <5.0 <0.50 <0.50 53.89 -28.78 no comment
<br /> 08730/99 95 1.7 7.4 2.1 15 -40.50 -40.50 <0.50 <0.50 <5,0 <50 <5.0 -40.50 -40.50 56,04 -30.93 no comment
<br /> 12110!99 <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 55.99 -30.88 nocornment
<br /> 03103!00 <50 <0.50 0.51 -40.50 0.92 <0.50 -40.50 <0.50 <0.50 <5.0 <50 6.0 -40.50 -40.50 54.53 -29.42 no odor/no sheen
<br /> 06/22/00 <50 <0,50 <0.50 <0.50 -0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 24 <0.50 <0.50 53.75 -28.64 no odor/no sheen
<br /> 09/28!00 <50 -40.50 <0.50 -40.50 <0.50 <5.0 no no no no na no na na 56.19 -31.08 no odor/no sheen
<br /> 12121100 <50 -40.50 <0.50 -40.50 <0.50 <5.0 no no no no na no no no 55.32 -30.21 no adorn sheen
<br /> 03/28/01 78 2.5 14 2.1 11 <5.0 no na no no na na na na 54.44 -29.33 no ododno sheen
<br /> 06/27/01 <50 <0,50 0.68 <0.50 -0.50 -40.50 -0.50 -40.50 -40,50 <5.0 <50 <5.0 -40.50 -40.50 55.89 -30.78 no odortno sheen
<br /> 09/06/01 <50 0,64 1.1 0.70 2.0 <5.0 na na na no no ne no no 57.96 -32.85 no odor/no sheen
<br /> 12103/01 <50 <0.50 1.1 <050 <0.50 <5.0 na na na na na na no no 58A5 -33.34 no odor/no sheen
<br /> MW-6 03/31/98 78,000 23,000 8500 1100 6300 <500 na na na na na na 61 43 25.44 -35.99 reported as MW-2A
<br /> screened 06/10198 120,000 23,000 17,000 1600 15,000 <500 na na no no no no 58.69 -33.25 reported as MW-2A
<br /> interval 09/08/98 120,000 30,000 20,000 2300 18 000 <0,50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 58.77 -33.33 odor I no sheen
<br /> 56'-76- 12/30/98 71,000 20,000 6500 1900 11,000 <250 no no no no na no 56,85 -31.41 slight odor Inosheen
<br /> 03/25/99 48,000 15,000 1800 910 5100 <0,50 -40.50 -40.50 -40.50 20 <50 56 54.86 -29.42 no comment
<br /> 06/03/99 33,000 9600 2500 1100 5400 <5.0 <5.0 <5.0 <5.0 <50 <500 <50 <5.0 10 54.14 -28.70 no comment
<br /> 08130/99 51,000 7200 5400 2400 11,000 42 <20 <20 <20 <200 <2000 <200 32 56 56.32 -30.88 no comment
<br /> 12110/99 67,000 13,000 2400 t8o0 95W <20 <20 <20 <20 -200 <50 -4200 68 46 56.29 -30.65 no comment
<br /> 03/03100 28,000 6000 280 570 3600 <20 <20 <20 <20 <200 <50 <200 <20 <20 54.89 -29.45 no odor/no sheen
<br /> 06122!00 26,010 6500 570 710 2900 <10 <10 <10 <10 <100 <1000 000 <10 <10 54.11 -28.67 slight odor/no sheen
<br /> 09)28X70 30,000 920 5300 830 6900 15.0 no na no no no no no no 56.47 -31.03 slight odarino sheen
<br /> 12!22100 55,000 9600 950 1600 8300 <200 na na no no na no no no 55.72 •30.28 odor I no sheen
<br /> 03/28/01 92,000 15000 6600 2800 13000 <50 no no no no no no no no 54.68 -29.24 odor/no sheen
<br /> 06/27101 86,000 15000 8900 2600 12000 <50 <50 <50 <50 -4500 <5000 <1000 94 130 56.17 -30.73 odor Ino sheen
<br /> 09106!01 95,000 17000 11000 2600 12000 <500 na no na na na na na na 58.20 -32.76 odor Ino sheen
<br /> 12/04/01 74,000 14000 4600 2300 10000 <500 no no na no no na no no 58.81 -33.37 odor/no sheen
<br /> MW-7 03131/98 <50 <0.50 -40.50 <0.50 <0.50 <5.0 no no na no no no 61.75 25.66 -36,09
<br /> screened 06/10198 <50 <0.50 -40.50 -40.50 -40.50 <5.0 no no no no na no 59.04 -33,38 no odor I no sheen
<br /> Interval 09/08/98 <50 <0.50 <0-50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 59.19 -33.53 no odor I no sheen
<br /> 56'-76' 12130198 <50 <0.50 <0,50 <0.50 <0,50 <5.0 na na na na na na 57.18 -31.52 no odor Inosheen
<br /> 03/25199 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5,0 <50 <5.0 55.07 -29.41 no comment
<br /> 06/03/99 <50 <0.50 <0.50 <0.50 <0.50 -40.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 5.6 <0.50 54.61 -28.95 no comment
<br /> 08130+89 <50 <0,50 <0.50 <0.50 <0.50 <0.50 <0.50 -40.50 <0.50 <5.0 <50 <5-0 2.1 <0.50 56.85 -31.19 no comment
<br /> l 12110199 <50 <0.50 <0.50 <0.50 <0,50 0.50 <0.50 <0.50 <0.50 <50 <50 <5.0 4.7 <0.50 56.68 •31.02 no comment
<br /> f 03103A)0 <50 <0.50 <0.50 -40.50 <0.50 0.62 -40.50 -40.50 <0.50 <5.0 <50 <5.0 5.0 <0.50 55.61 -29.95 no odorino sheen
<br /> 06/26100 <50 -40.50 <0.50 -40,50 -40.50 -40.50 <0.50 <0.50 <0.50 <5.0 <50 9,4 4.0 <0.50 54.62 -28.96 no odarino sheen
<br /> 09128!00 <50 <0.50 <0.50 <0.50 <0,50 <5.0 na na na no na na na na 56.93 31.27 no odorino sheen
<br /> 10!20!00 ns ns ns ns ns ns as ns ns ns ns ns as ns nm 24.73 nm wellhead re-surveyed
<br /> 12122/00 as ns ns ns ns ns ns ns ns ns ns ns ns ns am am no odarino sheen
<br /> 03/28/01 73 6.2 t7 1.5 7.5 <5.0 ns ns ns as ns as ns ns 54.73 -30.00 noodor/nosheen
<br /> 06!27/01 <50 <0.50 1.0 -40.50 <0.50 0.87 <0.50 <0.50 <0.50 <5.0 <50 <5.0 6.0 -40.50 55.99 -31.26 no odor/no sheen
<br /> 99!06101 <50 <0.50 -40.50 -40.50 -40.50 <5.0 no no no na no na no no 58.03 -33.30 no odor/no sheen
<br /> 12/03/01 <50 -0.50 <0.50 <0.50 <0.50 <5.0 no no no no no no na no 58.41 -33.68 no ododno sheen
<br /> .A
<br /> Promjod No.1474.44 Page 3 of 7 HORIZON 16MROXWENTAL INC.
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