Remediation Services PR-58

The PR-58 site (the Site) was previously used by the U.S. Navy as a military camp from 1942 until the end of World War II, by the U.S. Army as the Nike Battery PR-58 from 1954 to 1962, by the U.S. Navy as the DVTA from 1964 to 1974, and by Peabody Clean Industries (PCI) for hazardous materials storage and treatment from 1980 to 1983. Historical operations conducted on the Property by these operations resulted in releases of hazardous materials and impacts to environmental media. The source area has been defined as the area of the Site where chlorinated volatile organic compounds (CVOCs), primarily trichloroethene and tetrachloroethane, have been identified at concentrations greater than 10,000 ug/Kg in soil and/or 70,000 ug/L in groundwater. Investigations indicate that residual DNAPL is still present in the deeper unconsolidated overburden deposits and bedrock fractures in an area approximately 1/3 acre in size beneath the site. The exact vertical and horizontal extents of the source area are not currently well defined with the limited data available. The vertical extent consists of 25-45 feet of unconsolidated deposits underlain by approximately 40 feet of basal glacial till and weathered bedrock and at least 60 feet of competent bedrock with known contamination. The total depth of the source area in the bedrock is not well defined at this time but it appears that the treatment zone will be extend no deeper than 100 feet below ground surface (bgs). The objective of this remediation is to aggressively remediate the source area and render the source area and vicinity suitable for unlimited use and unrestricted exposure (UU/UE) in the long term. The selected source area remedy in the 2019 Decision Document is in-situ thermal treatment using either electric resistance heating (ERH) or thermal conduction heating (TCH). However, initial PDI and bench test findings have identified that TCH as the more feasible technology for the source area.

Division 02 -	Existing Conditions, Environmental Assessment, Natural Environment Assessment, Water Remediation.
Division 32 -	Exterior Improvements, Wetlands.