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l^ottolo Pig Farm Superfund Site

An overview of site condit ions and overa objectives

What 's Ahead

D Site Location & History D Remedial Actions D EPA's Five-Year Review D Data Summary D Next Steps

Site Location & Features

Site Chronology

Date

1960s-1979

1980-1983

1987

1991-1993

1998

2001

2003

2008

Event

Site under active use (disposal of wastes occurred from 1975 -1979)

Excavation and removal of soil and drums by EPA

Final listing on National Priority List (Superfund)

Remedial Investigation/Feasibility Study & Site remedy design and construction complete

Remedial Action completed & P^ Five-Year Review Report

Removal of interceptor trench & liner

Operations & Maintenance responsibilities transferred to State, 2"^ Five-Year Review Report & residential sampling program initiated

Third Five-Year Review report

What 's Ahead

n Site Location & History D Remedial Actions D EPA's Five-Year Review D Data Summary D Next Steps

Remedial Act ions

MONITORED NATURAL ATTENUATION OF PLUME

Soil Vapor Extract ion Vert ical View

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Source Control Remedy

What 's Ahead

D Site Location & History D Remedial Actions D EPA's Five-Year Review D Data Summary D Next Steps

EPA Th i rd Five-Year Review (Aug 08)

n Remedy protectiveness • Industrial solvents & arsenic remain

above cleanup levels • Slightly increasing concentrations • Potential residual source areas

uncharacterized • Expand monitoring program • Institutional controls not finalized

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Residential Sampling Program

D Began in 2003 D Five residences currently D Expanding program in 2009

Results of Residential Sampling

D All sampled wells are safe D One site-related contaminant

detected at very low levels D Maximum level allowed is 5 parts per

billion D Maximum currently detected is 1/10

of safe level or 0.5 ppb D All residents informed

Summary of Next Steps

D Investigation of residual source areas D Expand monitoring program

• Install & sample additional on-site monitoring wells

• Expand residential sampling program D Combined report with

recommendations D Additional remedial action? D Institutional controls

Ins t i tu t iona l Controls ( ICs)

n Institutional controls are actions, such as legal controls, that help minimize the potential for human exposure to contamination by ensuring appropriate land or resource use.

I n s t i t u t i o n a l Contro ls & Proper t y Trans fer Opt ions

D Town relieves tax lien and Mr. Mottolo deeds the Site to the State. State administers site management.

D Mr. Mottolo deeds the Site to the Town of Raymond. Town issued GMP and State administers.

Contacts n Andrew Hoffman, P.E., Project Manager

New Hampshire Department of Environmental Services Waste Management Division 29 Hazen Drive Concord, NH 03301 Ph. (603) 271-6778

D Peter Roth, Esq. New Hampshire Department of Justice 33 Capitol Street Concord, NH 03301 Ph. (603) 271-3679

D Ron Jennings, Remedial Project Manger U.S. Environmental Protection Agency Office of Site Remediation and Restoration 1 Congress Street, Suite 1100 (HBO) Boston, MA 02114 Ph. (617) 918-1247