Tobin Hall Deck PCB Completion Report and Addendum 2013 05 10

On behalf of the University of Massachusetts (UMass), this Polychlorinated Biphenyl (PCB) Remediation Completion Report has been prepared by Woodard & Curran to document the removal and disposal PCB-containing materials associated with the concrete stairs along the west side of Tobin Hall located at 135 Hicks Way on the UMass Amherst campus in Amherst, Massachusetts.

A PCB Remediation Plan for removal of the concrete decking on the west side of Tobin Hall was submitted to your office on July 20, 2011, and approved in a letter entitled: "PCB Risk-Based Decontamination and Disposal Approval under 40 CFR 761.61(c) and 761.79(h)," dated February 28, 2012 (included as Attachment 1). This work was completed per the Approval and a Final Completion Report and Monitoring and Maintenance Plan for encapsulated surfaces was submitted to the United States Environmental Protection Agency (EPA) on March 13, 2012.

Since the submittal of the Completion Report, an existing concrete stair and a small portion of concrete decking adjacent to Tobin Hall were scheduled for removal as part of the ongoing overall Commonwealth Honors College Residential Complex construction project. On September 25, 2012, a PCB Remediation Plan Addendum (the Addendum) detailing the proposed remediation of the joints and surrounding materials for this stair and decking was submitted to your office by Woodard & Curran. On October 2, 2012, a Contractor Workplan prepared by the selected contractor for the PCB remediation work was submitted to EPA.

Between October 5, 2012 and October 15, 2012, the remedial activities described in the Addendum were completed. Subsequent applications of the liquid encapsulant were applied in November 2012 and the waste materials were shipped off site for disposal in January 2013. This Completion Report includes a description of the work area, a summary of the remediation activities (which were conducted consistent with the previously approved plan), the results of the verification sampling, and a summary of the continuing monitoring activities to be conducted.