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I <br />,I <br /> I <br /> I <br /> I <br /> I <br /> I <br /> I <br /> I <br /> I <br /> I <br /> I <br /> I <br /> I <br /> I <br /> I <br /> I <br /> I <br /> I <br /> <br />2. ItYDROGEOLOGIC INVESTIGATION <br /> <br />2.1 INTRODUCTION <br /> <br />In general, the hydrogeologic investigations were executed quite thoroughly and <br />accurately from a geologic consideration. However, groundwater_.quali~ty was not <br />properly addressed as was required-by the scoping document. Water quality data is <br />normally an integral part of hydrogeologic investigations and serves to augment geologic <br />data to provide a clearer and more complete picture of hydrogeologic conditions present <br />on-site. Another area of concern was the limited amount of aquifer usage data <br />presented. The potential impact of underestimating shallow drift aquifer usage would in <br />effect limit the projected health risk potential when compared to the actual usage <br />conditions. Specific comments and questions are presented as follows: <br /> <br />2.2. SITE P: PAGES P-74 TO P-150 <br /> <br />Section A: Project Description <br /> <br />No comments. <br /> <br />Section B: Neighboring Environmental Site <br /> <br />Waste material from the existing Anoka Regional Sanitary Landfill has been <br />deposited within the boundary of Site P. The final disposal plans for this material <br />is not clear. <br /> <br />On p. P-78, Figure P.B.2 is referenced to illustrate the extent of existing <br />groundwater contamination beneath Site P. This figure is based on data collected <br />in December 1988, more than 1½ years ago. The additional groundwater sampling <br /> <br />2 <br /> <br /> <br />