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� I
<br /> • TABLE I
<br /> GROUNDWATER MONITORING DATA
<br /> Beacon Station No.474
<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 ethanal EDC EDB GW Elevation Elevation
<br /> Number Date (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (feet) (feet msl) (feet msl) Comments
<br /> MW-9 03/31/98 <50 <0.50 <0.50 0.50 <0.50 <5.0 na na na na na na 62,59 26.58 -36.01 reported as MW-IA
<br /> s2rsated 06/10/98 66 <0.50 <050 <0.50 <0.50 <5.0 na na na na na na 59.91 -33.33 reported as MW-IA
<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 59.99 -33.41 no odor/no sheen
<br /> 56'-75' 12/30/98 <50 <0.50 <0.50 <0.50 <0.50 <0.50 na na na na na na 58.01 -31.43 no odor/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 56.02 -29.44 no comment
<br /> 06/03/99 92 X0.50 <0.50 1.0 5.7 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 5.3 <0.50 55.43 -28.85 no comment
<br /> /30/99 58
<br /> <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5D <50 <5.0 0.66 <0.50 57.68 -31.10 no comment
<br /> 12
<br /> 12110/99 140 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5,0 0.81 <0.50 57.49 -30,91 no comment
<br /> 03/03/00 75 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 0.99 <0,50 56.54 -29.96 no odor/no sheen
<br /> 06126/00 73 <0.50 <0.50 <0.50 <0.50 <0.50 <0,50 <0.50 <0.50 <5.0 <50 to <0.50 <0.50 55.41 -28.83 no odor/no sheen
<br /> MW-IO10/26/99 420 0.65 0.94 <0.50 0.88 29 <0.50 <0.50 <0.50 TI <50 <5.0 2.2 <0.50 57.31 25.90 -31.41 no odorino sheen
<br /> screened; 03/03/00 1,100 1.1 <0.50 <0.50 <050 <0.50 <0.50 <0.50 <0.50 28 <0.50 <5.0 0.98 <0,50 55.32 -29.42 no odor/no sheen
<br /> intervA1 06/22/00 980 0.85 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 17 <50 <5.0 0.57 <0.50 54.55 -28.65 no odor/no sheen
<br /> 50.5.70.5
<br /> MW-11- 10/26/99 1,600 3.6 0.93 23 1.7 3.1 <0.50 <0.50 <0,50 <5.0 <50 <5.0 24 <0.50 57.72 26.14 -31.58 no odor/no sheen
<br /> screesW 03/03/00 300 0.8 <0.50 <0 50 <0.50 1.9 <0.50 <0.50 <0.50 <5.0 <0.50 <5.0 4.9 <0.50 55.64 -29.50 no odor/no sheen
<br /> auterval 06/22/00 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm ohstruction at
<br /> 50'-70'
<br /> MW-12 . 10/26/99 81,000 3,200 17,000 3,100 17,000 <2.0 <2.0 <2.0 <2.0 <20 <50 46,000 <50 66 53.51 25-79 -27.72 no odorino sheen
<br /> screened 03/03/00 70,000 2800 13,000 2,000 11,000 59 <50 <50 <50 <500 0.50 36,000 <200 <50 5563 -29.84 no odor/no sheen
<br /> interval 06/22/00 87,DD0 2600 14,000 2,400 13,000 <20 <20 <20 <20 <200 <2000 39,000 30 <20 54.64 -28.85 no odor/no sheen
<br /> 8;4'=89'
<br /> AS-1 10/26/99 1,700 100 7.7 26 27 5.0 <0.50 <0.50 <0.50 <5,0 <50 200,000 5.6 <0,50 60.94 no odor/no sheen
<br /> scorned 03/03/00 <200 8.0 <2.0 32 Q_0 11 <2.0 <2.0 <2.0 <20 <0.50 69,000 <2.0 <2.0 55.51 no odorino sheen
<br /> in4erval 06122/00 <200 8.3 2.8 3.2 4.2 10 <2.0 <2.0 <2.0 <20 <200 55,000 <2.0 <2.0 54.84 no odor/no sheen
<br /> 70:5"-75.5'
<br /> VW-I 09/08/98 170,000 36,000 47,000 3,300 24,000 0.70 <0.50 <0.50 <0.50 <5.0 61.0 6.8 58 88 nm nm strong odor!no sheen
<br /> #creeped 12/30/98 190,000 34,000 49,000 3,300 24,000 <1000 na na na na na na 57.10 nm odor/no sheen
<br /> 03/25/99 260,000 37,000 55,000 4,800 32,000 <5.0 <5.0 <5.0 <5.0 <50 <500 <50 55.05 nm no comment
<br /> 50'-65' 06/03/99 120,000 20,000 26,000 3,500 23,000 <5.0 <5.0 <5.0 <5.0 <50 <500 <50 140 520 54.19 nm no comment
<br /> 08/30/99 130,000 25,000 46,000 3,900 25,000 <50 <50 <50 <50 <500 <5000 <500 160 620 56.28 itm no comment
<br /> 12/10/99 200,000 22,000 35,000 3,300 23,000 <100 <100 <100 <100 <1000 <10000 <2000 160 590 56.42 nm no comment
<br /> 03/03/00 180,000 23,000 36,000 2,500 18,000 <100 <100 <too <100 <1000 <20000 <1000 1,500 5,800 55.63 nm noododnosheen
<br /> 06/22/00 190,000 23,000 39,000 3,200 22,000 <100 <100 <100 <100 <100t) <10000 <1000 130 540 54.16 nm no odorino sheen
<br /> 474gmr00.xls
<br /> 1474,43 Page 3 of 4 HORIZON ENVIRONMENTAL INC.
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