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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 DIPE ETBE TAME TBA methanol ethanol EDC EDB GW Elevation Elevation
<br /> Number Date (ug/L) (ugIL) (ug/L) (ug/L) (ug1L) (ug1L) (ug1L) (ug1L) (ug1L) (ug/L) (ugIL) jug/L) (ug/L) ug1L (feet) (feet msl) (feet msl) Comments
<br /> VW-1 09108198 170.000 36.000 47,000 3300 24,000 0.70 -0.50 <0.50 40.50 <5.0 61 6.6 58.138 nm nm strong odor/no sheen
<br /> screened 12!30198 190.000 34,000 49,000 3300 24,000 <1000 na na na na na na 57.10 nm odor/no sheen
<br /> interval 03125M 260,000 37,000 65.000 4800 32 000 <5.0 45.0 <5 0 <5.0 450 <500 450 55.05 nm no comment
<br /> 50'-65' 06/03/99 120,000 20,000 26,000 3500 23,000 <5.0 <5.0 <5.0 <5.0 <50 4500 <50 140 520 54.19 nm no comment
<br /> 08/30/99 130,000 25,000 46,000 3900 25,000 <50 450 <50 <50 <500 -5000 -500 160 620 56.28 nm no comment
<br /> 12/10/99 200,000 22.000 35,000 3300 23,000 4100 <100 <100 <100 <1000 <10,000 <2000 160 590 56.42 nm no comment
<br /> 03/03100 180,000 23,000 36,000 2500 18,000 <100 -100 <100 <1DO -1000 -20,000 -1000 15W 5800 55.63 nm no odorino sheen
<br /> 06122100 190,OW 23,000 39,000 3200 22,000 <100 <100 <100 <100 -1000 <10,OW -1000 1311 540 54.16 nm no odor/no sheen
<br /> 09128100 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm
<br /> 12122100 190,000 29,000 42,000 2900 20,000 -2000 na na na na na na na na 55.82 nm odor I no sheen
<br /> 03/28/01 1180,000 36,000 40,000 4900 20,000 -500 na na na na na na na na 54.93 nm odor I no sheen
<br /> 06127MI 190.000 28,000 40,000 3900 24,OW 4200 <200 <200 <200 <2000 <20000 14.000 290 730 56.43 nm odor I no sheen
<br /> 09MMI 230,0W 36,000 43,000 3300 20,000 <2000 na na na na na na na na 58.60 nm odor I no sheen
<br /> 12!04101 200,DOO 32,000 41,000 3500 23,000 <1000 na na na na na ne na na 58.91 nm odor/no sheen
<br /> VW-2 03103100 as ns ns as ns ns ns as ns ns nm ns as ns nm nm am dry
<br /> screened 06127/00 ns ns ns ns ns ns ns ns as ns ns as ns ns nm nm dry
<br /> Interval 09128/00 as ns as as ns ns ns as as ns ns as ns ns am nm dry
<br /> 37-47' 12/22/00 ii ns ns as ns ns ns ns as ns ns as as as as nm nm dry
<br /> 03128/01 as ns ns ns ns ns ns ns ns ns as as ns as nm am dry
<br /> 06127/01 as ns ns ns ns ns ns ns ns ns ns ns as ns nm nm dry
<br /> 09/06/07 ns ns ns as ns ns ns ns ns ns ns ns ns ns nm nm dry
<br /> 12104/O1 ns ns ns ns as ns ns ns ns ns as ns as ns am nm dry
<br /> VW-3 0=3/00 as ns ns ns ns ns ns ns as ns nm ns as ns nm nm nm dry
<br /> screened 06/22/00 as hs ns ns ns ns ns ns as as ns ns ns as nm am dry
<br /> interval 09128100 ns as ns ns ns ns ns as as ns ns as ns as am nm dry
<br /> 23-33' 12J22= as as ns as ns ns ns ns ns ns ns ns ns ns nm nm dry
<br /> 03128!01 as ns ns as ns ns ns ns ns ns ns ns ns ns nm nm dry
<br /> 06/27/01 ns ns ns ns ns as ns ns ns ns as ns as as nm nm dry
<br /> 09106101 as ns as ns ns as ns ns ns ns ns as ns ns nm nm dry
<br /> 12104101 ns ns as ns as as ns ns as ns ns ns as ns nm am dry
<br /> VW 4 09!0$198 86,000 19,000 6900 3100 20,000 1,4 <0.50 <0.50 <050 <5,0 74.0 450 59.10 am am strong odorino sheen
<br /> screened 12/30198 79,000 29,000 1600 3700 16,000 <100 na na na na na na 57.28 nm petrol.o omm sheen
<br /> interval 03/25/99 89ADD 14,000 2700 3200 13,000 <5.0 <5.D <5.0 <50 450 <500 450 55.23 nm 0 comment
<br /> 50'-65' 06103/99 39,000 10.000 1600 2900 11,000
<br /> <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 930 120 54.44 nm no comment
<br /> 08730199 50,000 9200 1500 3500 12.000 86 <20 420 <20 <200 <2000 <200 850 64 56.53 am no comment
<br /> 12/10/99 64,000 9300 2200 2800 9700 420 <20 <20 -20 <200 <10,000 <200 710 42 56.61 am no comment
<br /> 03103100 ns ns ns as ns ns ns ns as ns ns ns ns ns nm nm dry
<br /> 06/22100 nsns as ns as ns ns ns ns ns as ns ns ns am nm dry
<br /> 09/28ns as ns ns as ns ns as ns ns ns as as ns nm nm dry
<br /> /00
<br /> 2122100 55,000 6400 1600 3200 5400 <200 na na na na na na na na 56.01 nm odor r no sheen
<br /> 1
<br /> 03/28/01 41,000 5200 2000 2700 4600 <200 na na na na na na na na 55.00 nm odor
<br /> 06/27101 28,000 5000 580 3000 1900 <20 -20 <20 <20 <200 <2000 <200 370 420 56.42 nm odor!no sheen
<br /> 09106!01 26,000 2900 410 28W 840 <100 na na na na na na na na 50.45 nm odor I no sheen
<br /> 12104101 22,000 2000 550 2400 1200 4100 na na na na na na na na 59.10 nm odor I no sheen
<br /> 414grnM.d5 Page 6 of 7 HORIZON ENVIRONMENTAL INC.
<br /> Ptojed No.1474.44
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