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Woodard & Curran (W&C) has prepared this Release Abatement Measure (RAM) Completion Report and Class A-2 Response Action Outcome (RAO) Statement on behalf of the University of Massachusetts (UMass), for the disposal site identified by the Massachusetts Department of Environmental Protection (MassDEP) Release Tracking Number (RTN) 1-17872 (the “Site”). The Site is located at a portion of the UMass campus in Amherst, Massachusetts, identified as the Southwest Residential Area. The Site consists of an area of soils impacted by polychlorinated biphenyls (PCBs) released from caulking on concrete pads, walls, and other ground surface structures.
Since initial notification of the release in June 2010 to MassDEP, response actions to address release conditions have been regulated by both the United States Environmental Protection Agency (EPA) and the MassDEP. Response actions were conducted in accordance with an August 2010 EPA-approved Remediation Plan prepared under 40 CFR 761.61 and to a RAM Plan submitted to MassDEP under the Massachusetts Contingency Plan (MCP - 310 CMR 40.0000; MassDEP, 2010a). Work under these plans was completed between June and October 2010. In February 2011, a PCB Completion Report was submitted to EPA documenting the activities completed pursuant to the Agency’s Approval (W&C, 2011). In October 2010, a RAM Status Report was submitted documenting the status of the RAM activities. This submittal serves as a RAM Completion Report, which was prepared in accordance with Section 40.0446 of the MCP to document completion of the RAM activities. The RAM Transmittal Form (BWSC106) is provided via electronic transmission with this report (refer to Appendix A).
Completion of the remedial response actions effectively reduced the concentration of PCBs to below the MCP Method 1, S-2and S-3 soil standards applicable to current use of Site soils of 3 milligrams per kilogram (mg/kg), as well as below the MCP Method 1, S-1 soil standard applicable to unrestricted future use of Site soils (2 mg/kg). Therefore, in accordance with the Method 1 Risk Characterization prepared as part of this submittal, a condition of No Significant Risk to human health, as well as safety, public welfare, and the environment exists at the Site. In addition, this submittal also serves as a Class A- 2 RAO Statement prepared in accordance with Section 40.1036(2) of the MCP and documents achievement of a Permanent Solution at the Site. The RAO Transmittal Form (BWSC104) is provided via electronic transmission with this report (refer to Appendix A). The Chief Municipal Officer and Board of Health for the Town of Amherst were notified of the availability of this Class A-2 RAO Statement, pursuant to 310 CMR 40.1403(3)(f). Copies of these notices are included in Appendix B.