CCP 02-19-2002 - Laserfiche WebLink

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/tPl'hlDf)< tE-L Phase lEA - Morris Communications Sile NE Quadrant of 694 & 35W. Arden Hills, MN January 4,200] , D,ure2 e Geotechnieal soil borings were eompleted at the Site in the fall of 2000, In one boring 12 feet of fill eomprised of sand and einders was identified. The souree of the einders in the fill is unknown and represents a potential souree of contamination. Two groundwater monitoring wells are present' on the northwest portion of the Site, These wells are part of a large groundwater monitoring network associated with the' former Twin Cities Army Ammunition Plant' (TCAAP), located approximately 0,75 mile to the northeast of the Site,' The two on-Site wells were completed in two separate aquifers, Review of analytical data on water samples eollected from these wells indieates that ,groundwater on the western edge of the Site was impaeted in the past with volatile organic compounds (VOCs), representing a historieal reeognized environmental condition, However, eontamination has not been deteeted in these wells for several years, A groundwater pump and treat system continues to operation at the TCAAP faeility to remediate contaminated groundwater and eontain the contamination plumes that extend beyond the borders of the TCAAP faeility, e During the Site visit, debris and other items present on the ground surface of the Site included disearded metal piping and other metal equipment, brush, furniture, wood pallets, a small abandoned camping trailer, a wooden feed dispenser, plastie water and feed eontainers and discarded canvas signs, A small quantity of insulated wallboard with a tarpaper layer was observed on the ground in the northwest comer of the Site, The tarpaper layer may contain asbestos, Based on review of the regulatory database information, several facilities in the Site area have been the source of soil and/or groundwater contamination, Based on their distanee and/or loeation with respect to assumed groundwater flow direction, impacts at the Site from these doeumented releases, if any, are not expeeted to exeeed regulated levels. Review of a 1989 Phase I EA for the rendering plant property reported an old dump on the western portion of the Site, However, current information from the MPCA identifies this dump to be loeated approximately 0,75 mile north/northwest of the Site on the opposite side of the freeway, Aerial photographs dating baek to 1937 show no evidence of dumping activities on the Site, The Minnesota Department of Transportation (MnDOT) was contaeted in an attempt to verifY the location of the dump, Since this information was not available at the time this report was issued, an addendum letter will be prepared by JLM after receipt of the MnDOT response, e