Public Involvement Plan Meeting

1. Public Involvement Plan Meeting Former L.E. Mason Property 98 Business Street Hyde Park, MA January 18, 2006

2. Introductions • Om Chopra: Thomas & Betts • Corporate Director of Environmental Affairs • Dave Egan: Licensed Site Professional • LSP for the site since 1999 • John Mitchell: Project Manager - Shaw Environmental, Inc. • PM for the site since January 1997 • Members of Neponset River Watershed Association • Public Officials

3. Purpose of Meeting • To introduce public involvement plan • To provide a summary of past, current, and future site activities • Define mechanisms for future public involvement activities

4. Site Location • 98 Business Street, Hyde Park • Approximately 4 acres • Located adjacent to Mother Brook • Surrounded by commercial, recreational and residential properties

5. Property History • Property used for manufacturing since the 1850s • Miscellaneous die casting processes between 1945 & 2002 • Thomas and Betts Corporation acquired LE Mason in 1999 • Currently moving and storage business

6. Mother Brook History • The Original Big Dig • Oldest canal in the country (circa 1635) • Built to power mills along its length • Almost 400 years of Industry

7. Massachusetts Contingency Plan Overview • 310 CMR 40.0000 • Phased Approach for Investigation and Clean-up • End Point-Achieve a Response Action Outcome (RAO) • Defined as Achieving a Level of No Significant Risk

8. Overview of MCP • Phase I • Collect existing data • Limited sampling • Response Action Outcome • No Significant Risk • Phase II • Detailed environmental investigation • Risk Assessment • Phase III • Evaluation of Cleanup Alternatives • Phase IV • Cleanup Activities • RIP – Remedy Implementation Plan • Completion Report • Phase V • Operations and Maintenance

9. Additional Cleanup Activities in MCP • RAM • Release • Abatement • Measure • Response Action Outcome • No Significant Risk • IRA • Immediate • Response • Action

10. Public Involvement under the MCP • Goal • Inform Public of Environmental Assessment and Clean-up Activities • Fact Sheet Available • Public Involvement Plan (PIP) draft prepared and available for review (hand-out) • PIP Public Comment Period (1/19/06-2/7/06) • Final PIP to be Issued by 2/20/06

11. Overview of PIP 1.0 Introduction 2.0 Site Background 3.0 Address Public Comments 4.0 Public Involvement Activities 5.0 Schedule 6.0 Responsibility for Implementing 7.0 Revisions to PIP

12. Public Involvement Process under the MCP • Repository Location: Boston Public Library Hyde Park Branch 35 Harvard Avenue Hyde Park, MA • Next Milestone- Phase IV Remedial Implementation Plan Addendum (1st Qtr 2006) • Provide Notice to Mail List and Public Officials • Public Comment Periods

13. Regulatory History Massachusetts Contingency Plan • Prior to MCP in 1980s, several UST removals and small soil removals • Became Tier 1B site in 1995

14. Regulatory History (cont.) • Completed the following MCP milestones: • Phase I in 1995/1996 • Phase II in 1997 • LNAPL RAM removal in 1998 • Phase III in 1999 • Phase IV RIP in 1999 • Phase IV Cleanup Activities – 1999 to Present

15. Regulatory History (cont.) • Two additional RTNs issued for the site in 2000 related to Mother Brook • Mother Brook IRA completed in 2001-2002 • Tier 1B Extension for original RTN granted by MADEP in 2002 • Tier 1B Extension granted by MADEP in 2005 • Notice issued by MADEP requiring RAO by March 2007 • Phase II/Phase III addendum completed in 2005

16. Areas of Site • Die Prep Storage • Executive Office • Zinc Die Cast • Boston Water and Sewer • Aluminum Die Cast • Mother Brook

17. Response Action Outcomes April 2003 • Die Storage Preparation Area • Executive Office Area • Zinc Die Cast Area

18. Die Storage Prep Alleyway Response Actions • Petroleum Hydrocarbons and limited Chlorinated Solvents • Approximately 1000 cubic yards of soil removed • Activity and Use Limitation implemented • No Significant Risk to human health, public safety, or the environment achieved • Response Action Outcome achieved

19. Executive Office Area Response Actions • 1-550 gallon fuel oil UST removed • Release Abatement Measure for LNAPL in 1998 • Remediation by bailing and absorption • Activity and Use Limitation Implemented • No Significant Risk to human health, public welfare, or the environment • Response Action Outcome Achieved

20. Zinc Die Cast Response Actions • Two-10,000 gallon fuel-oil USTs removed • Several soil removal actions-late 80s and 2002 • LNAPL Recovery-1998 • Activity and Use Limitations Implemented • No Significant Risk to human health, public welfare, or the environment • Partial Response Action Outcome

21. Areas Requiring Further Activities • Boston Water & Sewer Outfall • Former Aluminum Die Cast • Mother Brook

22. BWSC Response Actions • BWSC upgraded outfall pipe from Business Street to weir on former LE Mason Site in 1998 • Removed 400 cubic yards of soil • Treated 36,330 gallons of groundwater • Release Abatement Measure conducted to remove PCBs in 1999 • Sediment, debris, and water removed. Pipe steam cleaned and tested below standards.

23. Additional Activity Planned • Lining of concrete pipe to prevent potential subsurface discharges from site

24. Aluminum Die Cast Response Actions • Fully operating facility until 2002 w/ limited access • Soil and groundwater sampling • Installation of a Barrier Wall in 2002 between ADC building and Mother Brook. • Additional assessment in 2004 • Abandoned storm drainage system beneath ADC in 2005 • Phase II/Phase III Addendum Completed

25. Barrier Wall Installation • Installed as a result of a SRM • Installed 12 to 22 feet below brook bed • Constructed of 6 to 24 inch thick wall • Lined vertically with 120-mil HDPE • Lined horizontally with 60-mil HDPE • Sloped Footing 6 to 12 inches of Bentonite toward recovery well • Bentonite covered with 6 to 12 in. of concrete

26. Former ADC Building • 20,000 sq ft building to be demolished (February 2006) • Phase IV Addendum (1st quarter 06) • Soil from area approximately 80x50x20 to be excavated • Groundwater to be removed from excavation • Area will be backfilled and capped • New building of similar size will be placed on same footprint

27. Mother Brook Response Actions • Sediment, Debris Removal and Water Treatment in 2001 • 2431 tons of soil/sediment removed from site • 105 yards of scrap materials • 24 tons of decon waste • 3,620,658 gallons of water treated

34. Mother Brook Plans • Damming of 1000 feet of MB • River diversion including natural resource protection • 12 to 18 inches of sediment to be removed • Re-establish grade with gravel & cobbles • Reintroduce vegetation where necessary

35. AUL and RAO • Activity and Use Limitations (Deed Restriction) for all on property areas. • Commercial or Industrial Use only • Response Action Outcome • Must be submitted to MADEP prior to March 2007

36. Public Comment Period • Any comments on the Public Involvement Plan are due by February 7, 2006. • Final PIP to be Issued by 2/20/06 • Comments should be submitted to: • John H. Mitchell, CHMM • Shaw Environmental, Inc • 88C Elm Street • Hopkinton, MA • John.Mitchell@shawgrp.com

37. Question and Answer Session • Open Discussion with Representatives of Thomas and Betts and the Public • Thank You for Your Interest and Input • Future notifications and reports will be available at “www.lemason.tnb.com”