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N <br /> nxscussgox <br /> The results of the :monitoring and ter,laboratory <br /> Ysis the Of <br /> results <br /> ground water samples for this quarter, re <br /> I. Th <br /> of previous quarterly monitoring and sampling slinuevents, <br /> forms <br /> summarized in Table are <br /> water :camp <br /> the field activities and arts and <br /> presenting the results of <br /> observations, as well as are inficial bAttachmentpA. <br /> chain of custody record, cluded in <br /> No free product was noted in any of the ground water s`A plc3, <br /> ed in thehowever, sheenasobserymetric surfacesmapamp�ebased from MW-3on the depth <br /> ground water po <br /> tento ground water measurements <br /> Watercollected <br /> level el of <br /> 1990, <br /> is presented in Figure 2. <br /> obtained from well MPS-3 was not used in the developmenn.i°f <br /> the ground water potentiometric contour map. The sampling event, <br /> water flow direction, as calculated from this sampr g event <br /> of0. the north-northwestoot. Apdeepicti monitoring averawell location <br /> of 0.007 foot/foot. A map depicting <br /> and the associated concentrations of - d asEpresented <br /> constituents detected from this sampling even <br /> in Figure 3. <br /> Results of the recent ground water monitoring and Laboratory <br /> analysis as well as results of previous sampling events <br /> indicate the following: <br /> o TPH-G and BTEX constituents have a refrom ma1gedMW-7, <br /> non-detectable in the samples <br /> AMw-2, and MW-1. The concentrations of TPH-G and <br /> BTEX constituents in MW-2 and AMW-3 have decreased <br /> in this sampling <br /> to below reported detection limits <br /> event. These five wells define the northern, <br /> southern, and western limits of the dissolved <br /> phase-hydrocarbon Plume. <br /> o Free floating product had been continually observed <br /> in Mw-3 during the previous monitoring events. <br /> However, only a sheen was observed from MW-3 during <br /> this recent monitoring event. Water samples from <br /> MW-3 had the highest %.z:nzantrations of <br /> dissolved-phase TPH-G and BTEX constituents. <br /> o TPHddettectiontlimitssinere thedsampledfromVe <br /> the reported <br /> AMW-1. <br /> o A review of the results of previous quarterly <br /> sampling events indicate a decreasing trend in the <br /> concentrations of TPH-G and BTEX constituents in <br /> Monitoring Wells MW-4 and [dW-S• <br /> ia BONN 1=11100MIJIM 11M <br /> �. <br />