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identified in ofthis appropriate to to impacted by the nearby grOlll1d water well, 200067, and Midwest Great 233799 are located the perched water ground water contaminant at the Indian Headparcel. Although. we11200067 is likely too deep (casing feet) to at risk, 233799, is reportedly completed at 95 feet Platteville Dolomite. Depending on of follow-up investigation ill area ofthe perched water contamination, sarnpling this well may need to be cond.ucted to evaluate conditions in the bedrock aquifer. 5. The MPCA requests that future reporting pertaining to the area-wide investigation should be inclusive of all historical ground water data whether from the most recent . investigation or more historical. For example, data from the historical perched water aquifer geoprobe investigations, although not pertaining to the new glacial monitoring wells are pertinent to the overall area-wide ground water investigation and should have been discussed. Additionally, one ofthe purposes ofthe area-\\ride investigation is to be able to integrate the location. of known source areas with ground water, future ground . water reports should also disc:uss the knO\vn or suspected sources that may be contributing to ground water contaminant trends. If such sources have not been investigated in areas of ground water contamination, these locations should be discussed as additional areas of focus as part of parcel-specific investigations. 6. Please note that according to the description of the reporting within the Agreement, the Supplemental Report is not considered by the MPCA to be equivalent to what is referred to in the Agreement as the Supplemental Groundwater Investigation Report, but rather as the Preliminary Groundwater Investigation Report, since this represents the first report documenting ground water data from newly installed wells for the area-wide (see pageS 7. Potential source areas for both the perched water and glacial aquifer ground water contamination should be incorporated into any proposals for parcel specific investigations which may be completed for redevelopment purposes. . -2-