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i <br /> i <br /> TABLE 3A <br /> QUARTERLY MONITORING GROUNDWATER DATA <br /> Beacon Station No. 474 <br /> Well Date MTBE DIPE ETBE TAME TBA Meth. Eth. EDC EDB <br /> Number ugfL u ugtL ugLL u ug/l u u u L Comments <br /> MW-8 03/31/98 <5.0 na na na na na na reported as MW-3A <br /> screen 06/10/98 <5.0 na na na na na na reported as MW-3A <br /> Interval 09/08/98 <0.50 <0,50 <0.50 <0.50 <5.0 <5.0 <5.0 slight odor/no sheen <br /> 56'-76' 12130/98 <5.0 na na na na na na slight odor/no sheen <br /> 03/25/99 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 no comment <br /> 06/03/99 <0.50 <0.50 <0.50 <0,50 <5.0 <50 <5.0 <0.50 <0.50 no comment <br /> 08/30/99 <0.50 <0.50 <0.50 <0.50 <510 <50 <5.0 <0.50 <0.50 no comment <br /> 12/10/99 <0.50 <0.50 <0.50 <0.50 5.1 <50 <10 0.51 <0.50 no oomment <br /> 03/03/00 -0.50 m.50 <0.50 <0.50 <5.0 <50 <5.0 <0.50 <0.50 no odor/no 9= <br /> MW-9 03/31/98 C5.0 na na na no no na reported as MW-lA <br /> sereen 06/10/98 <5.0 na na na na no no reported as MW-lA <br /> interval 09/08/98 <0.50 <0.50 <0.50 ®.50 <5.0 <5.0 <5.0 no odor/no sheen <br /> 56'-76' 12/30/98 <0.50 na na na na no na no odor/no sheen <br /> 03/25/99 ®.50 <0.50 <0.50 <0.50 <5.0 <500 <5.0 no comment <br /> 06/03/99 <0.50 m.50 <D,50 <0.50 <5.0 <50 <5.0 5.3 <0.50 no comment <br /> 08/30/99 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 0.66 <0.50 no eoatment <br /> 12/10/99 <D.50 <0,50 <0.50 <0.50 <5.0 <50 <5.0 0.81 <0.50 no comment <br /> 03/03/00 <0.50 <0.50 <000 <0.50 <5.0 <50 <5.0 0.99 <0.50 no odor/no sheen <br /> MW-10 10/26/99 2.9 <0.50 <0.50 <0.50 7.1 100 <5.0 2.2 <0.50 no odor/no sheen <br /> screen 03/03100 <D.50 <0.50 <0.50 <0.50 28 <50 <5.0 0.98 <0.50 no odor/no shun <br /> Interval <br /> SO.S-70.5 <br /> MW-11 10/16/99 3.1 <0.50 <0,50 <0.50 <5.0 <50 <5.0 24 <0.50 no odor/no sheen <br /> screen 03/03/00 1.9 <0.50 <0.50 <0.50 <5.0 <50 <5.0 4.9 <0.50 no odor/no sheen <br /> Interval <br /> 50'-70' <br /> MW-12 10/26/99 Q.0 <2,0 Q.0 <2.0 <20 <200 46,000 <50 66 no odor/no sheen <br /> screen 03/03/00 59 <50 <50 <50 <500 <1000 36,000 <200 <50 no odor/nosheen <br /> Interval <br /> 84'-89' <br /> AS-1 10/26/99 5.0 <0.50 <0.50 <0.50 <5.0 <50 200,000 5.6 <0.50 no odor/no sheen <br /> screen 03/03/00 11 <1.0 <2.0 Q.0 <20 <400 69,000 <1.0 <2.0 no odor/no sheen <br /> Interval <br /> gwgmdata.xls <br /> 1474.22rpt Page 3 of 4 HORIZON ENVIRONMENTAL INC. <br /> I <br />