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I,
<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 (ug1L) (ug/L) (ug/L) (ug1L) (ug1L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) ug/L (feet) (feet msl) (feet ms]) Comments
<br /> MW-5 03/31/98 <50 <0.50 <0.50 10.50 <0,50 <5.0 no no na no no no 61.11 25.11 -36.00
<br /> screened 06110!98 <50 <0.50 <0.50 10.50 <0,50 15.13 no no no no no no 58.41 .3330 no odor/no sheen
<br /> interval 09108!98 <50 '0.50 '0.50 10.50 10.50 10.50 '0.50 '0.50 <0.5o '5.0 1513 15.0 58.41 33.30 no oda/no sheen
<br /> 65'-68.5' 12/30/98 1513 '0.50 2.5 0.89 5.8 <5-0 no no na no no no 56.51 -31.40 no odor 1 no sheen
<br /> 03125/99 150 <0-50 10.50 10.50 10.50 10.50 <0,50 <0.50 <0.50 150 150 15.0 54.54 -29.43 no comment
<br /> 06103/99 150 10.50 10.50 10.50 '0.50 10,50 <0.50 10.50 <0.50 15.0 150 1&O <0.50 10,50 53.89 -28.78 no comment
<br /> 08!30799 95 1.7 7.4 2.1 15 <0.50 10.50 10.50 10,50 <5.0 '50 <5.0 10,50 10,50 56,04 30.93 no comment
<br /> 12110/99 <50 10,50 10,50 <0.50 10.50 10.50 '0.50 10.50 10.50 15.0 150 15.0 10.50 10.50 55,99 -30.88 no comment
<br /> 03/03100 '50 10,50 0.51 10.50 0.92 10.50 x0.50 <0.50 10.50 <5.0 <50 6.0 10.50 <0.50 54.53 -29.42 no odor/no sheen
<br /> 06/22100 150 10,50 10,50 <0.50 10,50 10.50 10.50 '0.50 10.50 <5.0 450 24 10.50 1050 53.75 -28,64 noodalnosheen
<br /> 09/28100 <50 <0.50 '0.50 10.50 10,50 15.0 no na na na no no na no 56.19 -31.08 no odor/no sheen
<br /> 12121100 150 10.50 10.50 <0.50 10.50 15.0 no no na no no no no no 55.32 -30.21 no oda/no sheen
<br /> 03/28/01 78 2.5 14 2.1 11 <5.0 no na no na no no no no 54.44 -29.33 no odalno sheen
<br /> 06!27/01 <50 -050 0.68 <0,50 10.50 10.50 10.50 10.50 10.50 <5.0 <50 <5,0 10.50 '0.50 55.89 30.78 no odalno sheen
<br /> 09/06101 150 0.64 1.1 0.70 2.0 15.0 no no no no na no no no 57.96 32.85 no odor/no sheen
<br /> 12103MI <50 <050 1.1 <0.50 <0,50 <5.0 no no na no no no na no 58.45 -33,34 nooda/nosheen
<br /> 02/28/02 <50 <0.50 0.55 10.50 10.50 <5.0 no no no no na no no no 57.31 -32.20 no odalno sheen
<br /> MW-6 03/31/98 76000 23000 8500 1100 6300 <500 na na no no no no 61.43 25.44 -35-99 reported as MW-2A
<br /> screened 06710/96 120000 230W 17000 1600 15000 1500 no no no no no no 58.69 -33.25 reported as MW-2A
<br /> interval 09AW98 120000 30000 20000 2300 18000 <0.50 10.50 <0.50 <0.50 15.0 150 15.0 58.77 -33.33 oda/no sheen
<br /> 56'-76' 12130198 71000 20000 6500 1900 11000 1250 na no no no no no 56.85 -31.41 slight odor 1 no sheen
<br /> 03125/99 48000 15000 1800 910 5100 10.50 10,50 10.50 10.50 20 -5w 56 54,86 -29.42 no comment
<br /> 06/03/99 33000 9600 2500 1100 5400 15,0 <5.0 150 <50 <50 1500 150 15.0 10 54.14 -28.70 no comment
<br /> 08/30/99 51000 7200 5400 2400 11000 42 120 '20 120 1200 <2000 1200 32 56 56-32 -30-88 no comment
<br /> ` 12110199 67000 13000 2400 18W 9500 <20 120 <20 <20 1200 1513 <200 68 46 56.29 -30,85 no comment
<br /> Z� 03103100 28000 6000 280 570 3600 <20 <20 120 <20 1200 150 1200 <20 40 54.89 -29,45no odalno sheen
<br /> 06/22/00 26000 6500 570 710 29W 110 110 110 <10 1100 17 000 1100 <l D <t 0 54.11 -28.67 slight odor l no sheen
<br /> 09128!00 30000 920 5300 830 6900 15.13 no no no no no no no no 56.47 -31.03 slight odor/no sheen
<br /> 1282100 55000 9600 950 1600 8300 1200 no no no no no no no no 55.72 -30.28 odano sheen
<br /> 0388/01 92000 15000 6600 2800 13000 <50 no no no no no no no no 54.68 -29.24 odor lnosheen
<br /> 06117101 86000 15000 8900 26W 12000 150 <50 150 <50 1500 15000 <10()u 94 130 5617 -30.73 oda l no sheen
<br /> 09/06101 95000 17000 11000 2600 12000 <500 no no no no no no no na 58.20 -32.76 odor Ino:hoen
<br /> 12/44/01 74000 14000 4600 2300 10000 <500 no na no no no no no no 56.81 -33.37 odorinoheen
<br /> 03/01/02 90000 130W 8300 2700 12000 <500 no no no no no no no no 57,61 -32.17 odorino sheen
<br /> MW-7 03/31/98 1513 <D.50 10.50 10.50 <0.50 15.0 no no no no no no 61.75 25.66 -36,09
<br /> screened 06110198 150 10,50 10,50 10,50 10,50 15.0 no no no na no no 59,04 -33,38 nocda/no sheen
<br /> interval 09/08/98 <50 <0.50 <0,50 <0.50 10.50 10,50 10.50 <0.50 10.50 '50 150 15.0 59,19 -33,53 no odor Ino sheen
<br /> 56'-76' 12730/98 450 10.50 10,50 10,50 10,50 15.0 no no no no no no 57.18 -31.52 no odor!no sheen
<br /> 03125!99 <50 10.50 10.50 10.50 10.50 10,50 10.50 <0,50 10.50 15.0 150 15.0 55.07 -29.41 no comment
<br /> 06!03199 150 10.50 10.50 10.50 10.50 10.50 <0.50 <O 50 10.50 <5.0 <50 <5.0 5.6 <0.50 54.61 -28.95 no Comment
<br /> 08/3 150 <0.50 10.50 <0.50 10.50 '0.50 10.50 10.50 10.50 <5-0 150 <5 0 2.1 10.50 56.85 -31.19 no comment
<br /> 12/10199 150 10,50 10.50 10,50 10.50 0.50 10.50 10.50 <0.50 <5,0 150 <50 4.7 10.50 56.68 -31.02 no comment
<br /> 03/03/00 150 10.50 10,50 10.50 10.50 0.62 10.50 10.50 10,50 15,0 150 15.0 5.0 10,50 55.61 -29.95 noodorinosheen
<br /> 06/26100 <50 <0.50 10.50 <0.50 <0,50 10.50 10.50 <0.50 10.50 15.0 150 9.4 4.0 10.50 54.62 -28.96 no oda/no sheen
<br /> 09128100 150 <0,50 10,50 10,50 10.50 15.0 no no no no no no no no 56.93 31.27 no ododno sheen
<br /> 10120100 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm 24,73 nm wellhead re-surveyed
<br /> 1282100 ns ns ns ns ns no ns ns ns ns ns ns ns ns nm nm no odalno sheen
<br /> 0388/OT 73 6.2 17 1.5 7.5 <5.o ns ns ns ns ns ns ns ns 54.73 -30.00 no odor/no sheen
<br /> W27101 150 10.50 1.0 10.50 10.50 0.87 <0.50 <0.50 <0.50 <5,0 150 15.0 6.0 <0.50 55.99 31.26 no odor/no sheen
<br /> 0996/01 150 '0.50 10.50 10.50 <m,50 <5.0 no no no no no no no no 58.03 -33.30 no odalno sheen
<br /> 12/03101 150 10.50 <0.50 10.50 <0.50 15.0 no no no no no na no no 58.41 -33.68 no odor/no sheen
<br /> 02/26/02 150 <0.50 10.50 10.50 <0,50 <5.0 na no no no no no na no 57.13 -32.40 no oda7no sheen
<br /> 474gnoo_ele
<br /> Project No.1474.44 Page 3 of 7 HORIZON ENVIROMIIICMTAL INC.
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