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TABLE 1 GROUNDWATER MONITORING DATA Beacon Station No.3641 1210 E.Hammer Lane,Stockton,California Depth to TOC GW Well TPHg benzene toluene ethylbenzene xylenes MTBE DIPE ETRE TAME TBA methanol ethanol DCA EDB GW Elevallon Elevation Number Date (ugA) (ugA) (ugA) (ugA) (ugA) (ugA) (ugA) (ugA) (ugA) (ugA) (ugA) (ugA) (ugA) (ugA) (feet) (feet msf) (feet msl) Comments VW-3 03/25/99 33000 1600 8100 1800 5400 660 <5.0 <5,0 <5.0 140 <50 <5.0 no no 42.07 nm nm slight odor/no sheen screened 06/02199 13000 6000 180 1400 300 4000 <0.50 <0.50 2.6 85 <200 a5.0 <0.50 <0.50 42.45 nm slight odor!no sheen interval 08/31/99 11000 860 230 470 140 6900 <10 <10 <10 300 <1500 <100 <10 <10 47.66 nm no comment 45'-55' 12/09/99 11000 1200 550 560 430 6200 <5.0 <5.0 <5.0 100 <500 <50 <5.0 <5 0 4560 nm no comment 03101100 12000 500 440 660 980 5000 <20 <20 <20 <200 <2000 <200 no no 4294 nm no comment 06/06100 5900 1400 170 340 260 5600 <2.0 <2.0 3.9 260 <2000 <20 <2.0 <2.0 42.00 nm clear 09/14100 2600 760 52 B5 120 2400 <2.0 <2.0 <2.0 110 <250 <20 <2.0 <2.0 46.28 nm clear 12112100 3700 220 180 140 280 5500 no no no no no no no no 44.63 nm clear 03/19101 2600 110 72 150 160 2700 no no no no no no no no 41.81 nm clear 06119101 11000 2900 450 280 860 6700 no no no no no no no no 44.50 nm dear 69/27/01 860 78 10 12 26 1700 no no na no no no no no 50.45 nm dear 12!13!01 1300 280 21 33 62 2400 no na na no no no no no 46.99 nm clear 03128/02 2900 91 52 150 170 2200 no no no no no no no no 43.63 20.06 -23,57 clear 06119/02 10000 2300 280 350 1100 5400 no no no no no no no no 45.46 -25.40 clear 09116t02 1400 170 34 52 74 1900 <5.0 <5.0 <5.0 62 <5o0 <50 <5.0 <5.0 50.66 -30.60 dear 12126102 1100 75 16 41 60 1600 no no no no no no na na 47.95 -27.89 clear 0312603 2100 150 15 64 150 1960 na no no no no no no no 45.55 -25A9 dear 06/27/03 6200 1600 100 130 390 6500 <10 <10 <10 <100 -1000 <100 <10 no 47.41 -27.35 clear 09/19/03 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm dry 12/30/03 ns ns ns ns ns ns ns ns ns ns ns ns ns ns 50.17 -30.11 dear 03126/04 2200 590 12 32 130 2700 <10 <10 <10 -100 <1000 <100 <10 no 47.70 -27.64 Gear 06!17104 ns ns ns ns ns ns ns ns ns ns ns ns ns ns 51.65 -31.59 not sampled 09109104 ns ns ns no ns ns ns ns ns ns no ns ns ns dry dry dry VW-5 03125199 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm nm screened 06/02199 ns ns ns ns ns ns ns ns ns ns no ns ns ns nm nm interval 08131199 ns ns ns ns ns ns ns ns ns ns ns ns ns ns 47.73 nm 0.05 it FP/sheen 40'-50' 12109199 100000 13600 10000 570 16000 31000 <20 420 <20 <200 -2000 <200 <20 <20 4570 nm no comment 03101/00 27000 5100 520 1500 770 14000 <50 <50 <50 <500 <5000 <500 no no 42.47 nm no comment 06/06/00 43000 7700 4600 1300 3700 16000 <10 <10 .410 750 -2500 <100 <10 <10 41.84 nm dear 09114100 ns ns ns ns ns ns ns ns ns ns ns ns ns ns 48.03 nm considered dry 121121130 16000 1000 1100 480 1800 24000 no no no no no no no no 44.01 nm clear 03119/01 29000 3300 4400 740 3000 20000 no no no no no no no no 41.38 nm clear 06/19/01 120000 18000 13000 2300 11000 41000 no no no no no no no no 44.71 nm dear 09127101 ns ns ns ns ns ns ns ns ns ns ns ns ns ns dry dry dry 12!13101 23000 2000 510 180 790 26000 ns ns ns ns no ns ns ns 46.51 nm sheen 03128/02 10000 760 5B0 89 330 14000 ns ns ns ns ns ns ns ns 43.09 19.39 -23.70 no comment 06/19/02 21000 3900 2300 190 750 20000 no no no no no no no no 45.42 -26.03 no comment 09/16/02 ns ns ns AS ns ns ns ns ns ns ns ns ns ns 4886 -29.47 no comment 12/26/02 58000 5500 4200 1000 4500 35000 no no na no no no no no 47.41 -28.02 dear 03/26/03 6800D 7500 8200 1300 6400 34060 no na na no no na no no 45.11 -25.72 dear 06127103 ns ns ns ns ns ns ns ns ns ns ns ns ns ns 47.45 -28.06 considered dry 09119103 ns ns ns ns ns ns ns ns ns ns ns ns ns ns dry dry dry 12/30/03 ns ns ns ns ns ns ns ns ns ns ns ns ns ns dry dry dry 03126104 48000 4900 3200 730 4700 25000 <50 <50 <50 10001 <5000 <500 <50 na 47.34 -27.95 odor 06117/04 ns ns ns ns ns ns ns ns ns ns ns ns ns ns dry dry dry 09!09!04 ns ns ns ns ns ns ns ns ns ns ns ns ns ns dry dry dry 641gmr.R1s - PrujeckNo_1641,97 Page 8 of 9 HORIZON ENVIROLTMENTAL INC.