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i • i ' <br /> TABLE l <br /> GROUNDWATER MONITORING DATA <br /> Beacon Station No 3641 <br /> 1210 E Hammer Lane,Stockton,California <br /> Depth to TOC GW <br /> Well TPHg benzene toluene ethylbenzene xylenes MTBE PIPE ETBE TAME TBA methanol ethanol DCA EDB GW Elevation Elevation <br /> Number Date (ugA) (ug/1) (ug") (ugn) (ugA) (ug/1) (u911) (ug/1) (UgA) (ug/1) (ug") NO) (u I) (ugA) (feet) (feet msl) (feet msl) Comments <br /> MW 2 10102/97 830W 16000 18000 2600 12000 940 <10 <10 <10 <1000 <100000 <2DDDO no no 5564 9804 4320 no sheen no odor <br /> screened 03131!98 1100 68 6 <0 50 99 14 no no no no no no no no 4845 5039 no sheen slight odor <br /> Interval 06/10198 760 20 16 <0 50 16 <50 no no no no no no no no 4541 5343 no sheen slight odor <br /> 50.75 09!08198 2000 350 <50 62 13 130 <0 50 <0 50 <0 50 24 250 <50 no no 4872 5012 no sheen no odor <br /> 12130M 97 54 <0 50 <0 50 <0 50 11 no no no no no no no no 4331 5553 no sheen no odor <br /> 03/25/99 74 2 <0 50 <0 50 <0 50 11 <0 50 <0 50 <0 50 <50 <50 <50 no no 4066 5818 no sheen no odor <br /> 06/02M 1700 5 2 0 8 46 1 1 19 <0 50 <0 50 <0 50 37 <50 <5 0 <0 50 <0 50 4170 5714 no sheen no odor <br /> 08131199 5600 1100 2 6 400 110 930 <2 0 <2 0 <2 0 1 DO <200 <20 27 <20 4734 5150 no comment <br /> 12/09199 420 <0 50 <0 50 <0 50 <0 50 720 <0 5o <0 50 051 40 <50 <5 0 0 8 <0 50 4418 5466 no comment <br /> 03101/00 150 <0 50 <0 50 <0 50 <050 310 <0 50 <0 50 <0 50 18 <5DO <50 no no 4169 5715 no comment <br /> 06106100 12DO 0 6 <0 50 <0 50 <0 50 62 <0 50 <0 50 <0 50 55 <2DO <50 <0 50 <0 50 4137 5747 clear <br /> 09/14100 3400 800 18 92 10 1000 <0 50 <0 50 071 110 <500 <5 0 13 <0 50 4746 5138 dear <br /> 12112100 56 <0 50 <0 50 <0 50 <0 50 1100 no na no no no no no no 4316 5568 Gear <br /> 03119/01 <100 <1 0 <1 0 <1 0 <10 680 no no no no no no no no 40 64 5820 dear <br /> 06119/01 910 <0 50 <0 50 <0 50 <0 50 140 no no no no no no no no 44 55 5429 clear <br /> 09127/01 2500 160 089 42 28 380 no no no no no no no no 4950 4934 Gear <br /> 12113101 170 <0 50 <0 50 <0 50 <0 50 1400 no no no no no no no no 4568 5316 clear <br /> 03/28102 <200 <2 0 <2 0 <2 0 <20 700 no no no no no no no no 4234 18 75 -2359 clear <br /> 06/19102 540 <1 0 <1 0 <1 0 <1 0 370 no no no no no no no no 4510 2635 Gear <br /> 09/16/02 5700 730 140 450 250 1100 <0 50 <050 061 82 <100 <10 1 1 <0 50 5014 31 39 clear <br /> 12/26/02 <200 <2 0 <2 0 <20 <2 0 1200 no no no no no no no no 46 65 2790 Gear <br /> 03/26/03 <100 <10 410 <10 <10 640 no no no no no no no no 4438 2563 clear <br /> 06127!03 190 <0 50 <0 50 3 0 14 400 <050 <0 50 <0 50 24J <50 <5 0 <0 50 no 4720 2845 clear <br /> 09/19/03 6000 530 280 670 470 1000 no no no no no no no no 53 64 -3489 clear <br /> 12/30/03 <200 <1 5 <1 5 <1 5 <1 5 580 no no no no no no no no 4888 3013 clear <br /> 03126/04 <100 <1 0 <1 0 <10 <1 0 400 <1 0 <10 <1 0 <10 <100 <10 <1 0 no 46 64 -2789 Gear <br /> 641 Wm As Page 2 of 11 HORIZON EIMROMMENTAL INC <br /> Proled No 164147 <br />