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*E1 y ' <br /> GROUNDWATER MONITORING DATA <br /> Beacon Station No 12474 <br /> 3440 East Main Street,Stockton,California <br /> ethyl- total Depth to TOC GW <br /> WellTPHg benzene toluene benzene xylenes MTBE DIPE ETBE TAME TBA methanol ethanol DCA EDB GW Elevation Elevation <br /> Number Date u 1L u IL u IL u !L u lL u IL u IL (ug/L (u lL) (u IL (ug/L (ug/L (ug/L u lL (feet) fest msl feet msl Comments <br /> VW-3 03/03/00 ns ns ns ns ns ns ns ns ns ns nm ns ns ns nm nm nm dry <br /> screened 06122/00 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm dry <br /> interval 09/28/00 ns 1 ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm dry <br /> 2343' 12122/00 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm dry <br /> 03/28/01 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm dry <br /> 06/27/07 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm dry <br /> 09/06/01 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm dry <br /> 12104!!01 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm dry <br /> 03/01/02 ns ns ns ns ns ns ns ns ns ns ns ns ns nsi nm nm dry <br /> 05/20/02 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm dry <br /> 03107/03 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm dry <br /> 06103/03 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm dry <br /> 08/28/03 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm dry <br /> 11/25/03 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm dry <br /> 03/01/04 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm 2522 nm dry <br /> 06/08/04 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm not sampled <br /> 09/08/04 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm not sampled <br /> 12/08/04 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm not sampled <br /> 03/10/05 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm not sampled <br /> 05!25105 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm not sampled <br /> 09101105 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm not sampled <br /> VW4 09/08/98 86000 19000 6900 3100 20000 14 <111 <0 50 -1051 <5 0 740 <5 0 na na 5910 nm nm strong odorino sheen <br /> screened 12/30/98 79000 29000 1600 3700 16000 <100 na no no no na na no na 5728 nm petrol odorino sheen <br /> interval 03/25199 89000 14000 2700 3200 13000 <50 <50 <5 0 <5 0 <50 <500 <50 na na 5523 nm no comment <br /> 50'-65' 06/03199 39000 10000 1600 2900 11000 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <5 0 930 120 1 5444 nm no comment <br /> 08/30/99 50000 9200 1500 3500 12000 86 <20 <20 <20 <200 <2000 <200 850 64 5653 nm no comment <br /> 12110!99 64000 9300 2200 2800 9700 <20 <20 <20 <20 <200 <10000 <200 710 42 1 56 61 nm no comment <br /> 03103100 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm dry <br /> 06/22/00 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm dry <br /> 09/28/00 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm dry <br /> 12122/00 55000 6400 1600 3200 5400 <200 na na na no no na no no 5601 nm odor l no sheen <br /> 03128101 41000 5200 2000 2700 4600 <200 na na na no na na no no 5500 nm odor 1 no sheen <br /> 06/27/01 28000 5000 580 3000 1900 <20 <20 <20 <20 <200 <2000 <200 370 <20 5642 nm odor/no sheen <br /> 09/06/01 26000 2900 410 2800 840 <100 no na na no no na na na 5845 nm odor lno sheen <br /> 12/04/01 22000 2000 550 2400 1200 <100 na na no no no no na no 5910 nm odor I no sheen <br /> 03/01102 20000 1900 110 2500 1400 <100 na no no na na no na na 5795 nm odor I no sheen <br /> 05/20102 18000 1300 430 2000 1600 <10 <10 <10 <10 <100 <1000 <100 130 <10 5809 2774 -3035 no odor lno sheen <br /> 08/30/02 20000 1500 460 2300 1300 <100 no no na na no no na no 6104 -3330 odor 1 no sheen <br /> 12/06102 36000 3600 1000 3000 4300 <20 no no na na na no na na 6144 3370 odor lno sheen <br /> 03/07103 45000 4600 2400 3100 6700 <200 no no no na no no na na 6037 -3253 odor I no sheen <br /> 06/03103 38000 5300 710 3100 4800 <20 <20 <20 <20 <200 <2000 <200 <20 <20 5977 -3203 odor I no sheen <br /> 08129/03 40000 5000 1200 2500 4000 <200 no no na no no no no no 6151 -3377 no odor lno sheen <br /> 11125/03 ns ns ns ns ns ns ns ns ns ns ns ns ns ns 61 99 -3425 not sampled <br /> 03/01104 33000 4600 1300 2400 3300 <10 <10 <10 <10 <100 <1000 <100 38 <10 6070 2522 -3548 odor/no sheen <br /> 06/08104 ns ns ns ns ns ns ns ns ns ns ns ns ns ns 6104 -3582 not sampled <br /> 09/09104 20000 3800 450 1400 980 <100 no no no no na no no no 6275 -3753 odor 1 no sheen <br /> 12/08104 ns ns ns ns ns ns ns ns ns ns ns ns ns ns 6288 -3766 not sampled <br /> 03110/05 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm not sampled <br /> 05/25105 ns ns ns ns ns ns ns ns ns ns ns ns ns ns 5794 -3272 not sampled <br /> 09102/05 2300 130 93 100 230 <5 0 no na no na no na no no 6105 3583 odor/no sheen <br /> 474gmr05 As <br /> Frgectsio 147448 'I Page 16 of 18 HORIZON ENVIRONMENTAL INC <br />