| Pre-Remedial Action Activities GSA Property No. DOMA 001902 | Watertown, MA

CONTRACT NO.:W912WJ-11-D-0009 TO 0003

Presentation Overview

Who’s Involved

Project / Site History

Remedial Activities / Planned Work

Pre-Remedial Action Activities

Public Involvement

Questions & Answers

Project Team

GSA | Property Owner

DCR | Property Owner

MassDEP | Lead Regulator

USACE | Contract Administrator

Charter | Remedial Action Contractor

Site Description

Site History

Project Overview

PCB “Hot Spots” to be removed and

disposed of off-site

Soil Cover over PCB area

Wetland Mitigation

Site Activities To Date Site Survey Engineering Survey of

Buildings Hazardous Material

Survey

Building 234 Characterization Survey

Project Submittals Initial Site Mobilization

Project Schedule

Pre-Remedial Action Activities Mobilization Selective Clearing Asbestos Abatement Building Demolition

Future Remedial Activities Excavation of PCB > 50 PPM

Install Soil Cover

Wetland Replication

Non-Friable Asbestos Abatement Roof Coatings Tile – Floor & Ceiling Window & Door Caulking Window Glazing Panel Board Adhesive Ceiling Panels Vibration Damper

Universal Waste Removal PCB/Non-PCB Lighting Ballasts Mercury-Containing Lighting &

Devices Small Propane and Freon Tanks Aerosol Spray Paint Cans

Abatement Activities

Demolition Activities Engineering Survey of

Buildings – Soundness for Demolition

Cut and Cap Utilities Dust Control

Selective Interior Demolition

Building Demolition Waste Segregation

& Off-Site Disposal

Primary Truck Route

Public Involvement

Monthly Status Reports:

Future Public Meetings: Stakeholder Draft RAWP | Late 2012 Wetland Replication | Early 2013

Questions & Answers