Anderson Geological, Inc. (AGI) completed a Phase I Environmental Site Assessment on five parcels of land adjacent to Coffin Butte Landfill. The properties were being acquired by Bonneville Power Administration (BPA) and Oregon Department of Fish and Wildlife (ODFW) as part of BPA’s Willamette Wildlife Mitigation Program. The land was to be purchased by BPA and turned over to ODFW for management as wildlife habitat as part of the nearby E.E. Wilson Wildlife Area.
All of the parcels were located on land on and adjacent to Coffin Butte, which was part of Camp Adair in the 1940’s. Camp Adair was a military training camp during World War Two where troops received training in weapons and military tactics. A portion of one of the parcels was located adjacent to a former small arms training range. AGI concluded that given the location of the subject property, it was unlikely that it would have been significantly impacted by activities at the training facility.
Three of the parcels were located downgradient of Coffin Butte Landfill, which has been in operation since the days of Camp Adair. Groundwater monitoring at the landfill had shown low concentrations of volatile organic compounds and metals in groundwater between the landfill and the three downgradient parcels. No contaminants were detected near the subject properties and the plume was found to be stable or retreating.