Polution Situation Report

U.S. ENVIRONMENTAL PROTECTION AGENCY
POLLUTION/SITUATION REPORT
Ordnance Products, Incorporated Superfund Site - Removal Polrep

EPA Emergency Response

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
Region III

Subject:

POLREP #5
Completion of Removal Action Activities
Ordnance Products, Incorporated Superfund Site
MDD982364341
North East, MD
Latitude: 39.6311190 Longitude: -75.9214070

To:

From:

Francisco J. Cruz, On-Scene Coordinator

Date:

9/1/2013

Reporting Period:

09/17/2012-09/20/2012

1. Introduction

1.1 Background

Site Number:	MDD982364341	Contract Number:
D.O. Number:		Action Memo Date:
Response Authority:	CERCLA	Response Type:	Time-Critical
Response Lead:	EPA	Incident Category:	Removal Action
NPL Status:	NPL	Operable Unit:
Mobilization Date:	8/29/2012	Start Date:	6/14/2012
Demob Date:	9/20/2012	Completion Date:
CERCLIS ID:		RCRIS ID:
ERNS No.:		State Notification:
FPN#:		Reimbursable Account #:

1.1.1 Incident Category

CERCLA

1.1.2 Site Description

The Ordnance Products Incorporated Superfund Site (OPI) consists of a 95 acre property located in North East, Maryland. OPI was historically occupied by an ordnance component manufacturing facility from 1960 to 1972. The plant produced, stored, and packaged grenade fuses, detonators, and related devices for the U.S. military. Waste from the manufacturing process was either buried onsite in open pits or discharged to five unlined surface impoundments. After manufacturing work ended in 1972, waste material remained in the surface impoundments or was buried in pits and trenches throughout the site. These wastes included drums of solvents and acids, detonators, and grenade fuses.

The Removal Action being conducted at OPI is occurring at two private residences near the site.

1.1.2.1 Location

The site is located near Mechanics Valley Road in North East, Maryland.

1.1.2.2 Description of Threat

Trichloroethylene (TCE) contaminated groundwater from the site is causing hazardous vapors to enter two homes near the site. Both homes exhibit indoor air levels of TCE above 6.3 parts per billion (ppb). Current EPA guidance advises that a Removal Action should be conducted if indoor air levels are above a Hazard Index (HI) of 3. The HI of 3 for TCE is above 6.3 ppb.

1.1.3 Preliminary Removal Assessment/Removal Site Inspection Results

EPA's Remedial Program conducted indoor air sampling events in September 2009. Two homes during the sampling event were shown to have elevated levels of TCE. The highest indoor air level in a home identified as VI-46 was 13 ppb. The highest Indoor air level of TCE in a home identified as VI-47 was 97 ppb. Although the levels were not deemed elevated at the time, when numbers were reevaluated with EPA's 2012 Regional Screening Levels Residential Air Table, the levels do appear to pose a threat to human health.

2. Current Activities

2.1 Operations Section

2.1.1 Narrative

During the week of Monday, September 17 2012, Removal Action activities were completed to ensure complete installation of the vapor mitigation systems at the two homes. The extraction fan was installed at VI-47, and the piping was connected to the fan to begin the extraction process. All activities to complete the installation of the vapor mitigation system on VI-46, including installing a proper cap on the exhaust pipe, were completed. All activities were completed to the satisfaction of the homeowners.

2.1.2 Response Actions to Date

Vapor mitigation systems were successfully installed at the affected homes on the site.

2.1.3 Enforcement Activities, Identity of Potentially Responsible Parties (PRPs)

The OSC will coordinate with enforcement staff, as necessary. To date, a viable PRP has not been identified for the site.

2.2 Planning Section

2.2.1 Anticipated Activities

Indoor air sampling will be completed to ensure efficacy of the vapor mitigation system.

2.2.2 Issues

There are no issues at this time.

2.3 Logistics Section