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• T*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 TPI-Ig benzene toluene benzene xylenes MTBE DIPE ETRE TAME TBA methanol ethanol DCA EDB GW Elevation Elevation <br /> Number Date (ugIL (ug/L u IL (ug/L (ug/L (ug/L (ug/L} (ug/L u IL (ug/L u !L (ug/L (ug/L u IL feet feet msl feet msl Comments <br /> MW-6 03!31198 78000 23000 8500 1100 6300 <500 na na na na na na na na 6143 2544 -3599 reported as MW 2A <br /> screened 06/10/98 120000 23000 17000 1600 15000 <500 na na na na na na na na 5869 -3325 reported as MW-2A <br /> Interval 09/08/98 120000 30000 20000 2300 18000 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <5 0 na na 5877 -3333 odor 1 no sheen <br /> 56-76' 12130!98 71004 20000 6500 1900 11000 <250 na na na na na na na na 19685 -3141 slight odor I no sheen <br /> 03!25199 48000 15000 1800 910 5100 <0 50 <0 50 <0 50 <0 50 20 <50 56 na na 5486 2942 no comment <br /> 06103!99 33000 9600 2500 1100 5400 <5 0 <5 0 <5 0 <50 <50 <500 <50 <5 0 10 5414 28 70 no comment <br /> 08/30/99 51000 7200 5400 2400 11000 42 <20 <20 <20 <200 <2000 <200 32 56 5632 3088 no comment <br /> 12/10199 67000 13000 2400 1800 9500 <20 <20 <20 <20 <200 <50 <200 68 46 5629 -3085 no comment <br /> 03103!00 28000 6000 280 570 3600 <20 <20 <20 <20 <200 <50 <200 <20 420 5489 2945 no odor lno sheen <br /> 06122/00 26000 6500 570 710 2900 410 410 <10 <10 <100 <1000 <100 <10 <10 5411 2867 slight odor!no sheen <br /> 09128/00 30000 920 5300 830 6900 <5 0 na na na na na na na na 5647 3103 slight odor/no sheen <br /> 12!22100 55000 9600 950 1600 8300 <200 na na na na na na na na 5572 3028 odor lno sheen <br /> 03!28101 92000 15000 6600 2800 13000 <50 na na na na na na na na 5468 -2924 odor 1 no sheen <br /> 06/27/01 86000 15000 8900 2600 12000 <50 <50 <50 <50 <500 <5000 <1000 94 130 56 17 -3073 odor no sheen <br /> 09/06/01 95000 17000 11000 2600 12000 <500 na na na na na na na na 5820 -3276 odor no sheen <br /> 12/04101 74000 14000 4604 2300 10000 <500 na na na na na na na na 5881 3337 odor lno sheen <br /> 03101!02 90000 13000 8300 2700 12000 <500 na na na na na na na na 5761 -3217 odor 1 no sheen <br /> 05/20/02 81000 14000 6200 2100 10000 <100 <100 <100 <100 <1000 <10000 <1000 <100 <100 5785 2739 -3046 odor/no screen <br /> 08130!02 77000 13000 6600 1600 8800 <1000 na na na na na na na na 6090 3351 odor lno sheen <br /> 12106/02 75000 16000 1900 2100 11000 <50 na na na na na na na na 60 98 -3359 odor I no sheen <br /> 03107/03 47000 8500 1400 1900 4800 <500 na na na na na na na na 5999 3260 odor I no sheen <br /> 06/03/03 37000 5300 830 1600 3200 <25 <25 <25 <25 4250 <2500 <250 <25 <25 5784 -3045 odor!no sheen <br /> 08/29/03 86000 15000 2200 2300 11000 <500 na na na na na na na na 6133 3394 no odor 1 no sheen <br /> 11/25/03 ns ns ns ns ns ns ns ns ns ns ns ns ns ns 6206 -3467 not sampled <br /> 03/01104 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm 2523 nm not sampled <br /> 06l0$104 ns ns ns ns ns ns ns ns ns ns ns ns ns ns 61 19 -3596 not sampled <br /> 09/09104 190000 17000 610 4900 14000 <250 na na na na na na ns ns 6288 3765 odor/no sheen <br /> 12/08104 ns ns ns ns ns ns ns ns ns ns ns ns ns ns 6298 -3775 not sampled <br /> 03!11105 18000 4100 69 420 630 <10 <10 <10 <10 <100 <1000 <100 <10 <10 6245 -3722 odor!no sheen <br /> 05/25/05 ns ns ns ns ns ns ns ns ns ns ns ns ns ns 6053 -3530 not sampled <br /> I I <br /> I <br /> i <br /> I <br /> f <br /> 474gmr05xls <br /> Praieci No 1474 40 Page 6 of 18 HORIZON ENVIRONMENTAL INC <br />