# Presentation: 458359

## McCoy FieldProposed Keith Middle School Site

**EPA Proposes Approval of McCoy Field Cleanup Plan**

## McCoy Field

**EPA Role:**
- Site location is a local decision
- EPA’s involvement triggered by PCBs
- Authority for overseeing cleanup and disposal is under Toxic Substances Control Act

## McCoy Field

**EPA’s Oversight Includes**:
- Requiring & reviewing City’s cleanup plan
- Rendering decision either: approval, approval with conditions, or denial
- Providing implementation & maintenance oversight

## McCoy Field

**Approval with Conditions:**
- Wetlands cleanup plan within 60 days
- City cleanup plans for High School and/or private properties or demonstration sites aren’t under federal PCB regulations
- Detailed Monitoring & Maintenance Implementation Plan
- City cleanup plan implemented as approved by EPA & certified documentation of final site design

## McCoy Field

**Citizen Input on:**
- Technical merits
- Monitoring and maintenance implementation plan
**Comment Period Ends Friday, July 15, 2005**
- Kimberly Tisa, PCB Coordinator
- U.S. Environmental Protection Agency
- One Congress Street, Suite 1100 (CPT)
- Boston, MA 02144-2023
- By e-mail:	_tisa.kimberly@epa.gov_
- By fax: Attn:   Kimberly Tisa at 617-918-0527

## McCoy Field

- Technical Components of the Proposed Cleanup Plan

## McCoy FieldEvaluating Potential Human Health Risks

- Three Potential Exposure Pathways:
- Direct Contact
- Ingestion of Soil
- Inhalation

## McCoy FieldProposed Cleanup Plan Overview

- Removal of PCBs of greater than or equal to 100 parts per million within the excavation areas
- Construction of the school building on pile caps/grade beams above ground surface

## McCoy FieldProposed Cleanup Plan Overview

**Outside Barriers**
- Installation of surface cover outside building footprint:
- _landscaped areas_: a geotextile liner and a minimum of a 3-foot soil cap;
- _parking areas:_ a geotextile liner and a minimum 2-foot cap with an asphalt cover.

## Typical Cap Details

_**Landscaped Areas**_

- Loam

- Crushed stone

- Granular backfill

- Warning barrier

- Ash Fill

- Grass

- Pavement

**Typical Cap Details**

- 2 feet

- 3 feet

- Geotextile barrier

_**Paved Areas**_

## McCoy Field Cleanup Plan Overview

**Indoor Barriers**
- Installation of passive vapor collection system and solid vapor barrier beneath building footprint

**Vapor Barrier Details**

_**Membrane at Grade Beam**_

_**Membrane Vent Detail**_

_**Membrane at Pile Cap**_

_**Membrane at Penetration**_

- Membrane

- Membrane

- Vent

## McCoy FieldCleanup Plan Overview 

- Establishment of a long-term monitoring and maintenance plan

## McCoy Field Monitoring & Maintenance Implementation Plan

**Potential Components**
- Inspection & maintenance of surface covers
- Indoor air monitoring
- Groundwater monitoring
- Communications plan
- Regulatory reporting requirements

## McCoy FieldEPA’s On-going Role

**Continued Oversight:**
- Ensure City implements Maintenance and Monitoring Implementation Plan requirements
- EPA retains regulatory authority to require additional measures

## McCoy Field

**Citizen Input on:**
- Technical Merits
- Monitoring & Maintenance Implementation Plan
**Comment Period Ends Friday, July 15, 2005**
- Kimberly Tisa, PCB Coordinator
- U.S. Environmental Protection Agency
- One Congress Street, Suite 1100 (CPT)
- Boston, MA 02144-2023
- By e-mail:	_tisa.kimberly@epa.gov_
- By fax: Attn:   Kimberly Tisa at 617-918-0527