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t <br /> p„ <br /> w <br /> 7. STfjTUS OF DISSOLVED CONSTITUENT PLUME DEFINITIO le since late 1986. <br /> lin has been done on an approximately quarterly schedule <br /> Groundwater ;amp g replacement, MW6)during this time has con <br /> Groundwater sampled from well MW3 {and its <br /> ed higher concentrations of petroleum constituents than water from the other four wells <br /> tarn g greater than 0.5 <br /> Because MW3 and MW6 are surrounded by the <br /> radians of BTEX g four w,11 locations and no <br /> (Table 2)• and no cone <br /> concentrations of TPH greater than 50�tglL wcils,the dissolved constituent plume <br /> p,g/L.have been detected in groundwater from the outlying Pears to remain beneath the <br /> a in limited to the area immediately around MW3 (and MW6),directly <br /> P <br /> _ former tank field(Figure 2). <br /> 8. STATUS OF DISSOLVED CONSTITUENT REMEDIATION <br /> vroundwater remediation is not currently planned. <br /> , WATER LEVEL RECORDS AND GRADIENT llETCRMINA"PIONS <br /> 9 tical <br /> The depth to groundwater in each well was measured lculted using hat the time ese dataand surveyed op-of- <br /> interface probe, Groundwater elevations we <br /> sin elevations. The December 1990 groundwater elevations indicated a downgradient direc- <br /> ca g <br /> tion of northeast(Figure 4). <br /> �. water elevations indicate the presence of a motidl,ntstockton durie area of ng <br /> The March 1991 ground unusually heavy rainfall <br /> (Figf the site ure 5). This result may have been caused by not capped by asphalt and <br /> March 1991. The former tank field area is the from that opening <br /> water could leave intiltratcd the soils around <br /> d in Table 6. Throughout the gau i <br /> The gauging <br /> records for the past two years are summarizeg•n€ <br /> b adient has been generally toward the northeast <br /> _period,the . <br /> 3 <br />