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News Release Plume Investigation Continues on Camp Edwards' Southeast CornerCamp Edwards, Mass. — Results from an ongoing investigation of groundwater contamination on Camp Edwards' southeast corner indicate a plume of the contaminants RDX and perchlorate are migrating north from a former training and defense contractor testing area known as the J-2 Range. Contaminants from this plume have not been detected in any public or private drinking water wells and the plume does not present an immediate health risk. This contamination is believed to be coming from a munitions disposal area on the J-2 Range. The plume is located in an area of the aquifer that could eventually contribute water to one of the Upper Cape Water Supply Cooperative supply wells. Based on current investigation results, the plume extends approximately 5,500 feet north from the J-2 Range and is approximately 1,800 feet wide. The highest concentrations were detected in a monitoring well approximately 1,000 feet north of the source. RDX was detected at 10.8 ppb and perchlorate at 140 ppb in groundwater at that location. Detections at one of three new well sites define the current northern extent of the plume. Results from that well found RDX below the 2 ppb Health Advisory and perchlorate within the current 4 to 18 ppb U.S. Environmental Protection Agency guidance for cleanup of perchlorate in drinking water. The perchlorate level also is above the Massachusetts Department of Environmental Protection (MADEP) advice level that states pregnant women, children to age 12 and individuals with hypothyroidism should not drink water with perchlorate above 1 ppb. The Groundwater Study Program, EPA and MADEP are identifying several additional monitoring well locations. As investigations to determine the nature and extent of groundwater contamination from the J-2 Range progress, cleanup alternatives will be evaluated. For further information on Groundwater Study Program activities, log on to www.groundwaterprogram.org. # # #
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