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North Penn Area 6

All POL/SITREP's for this site North Penn Area 6
Lansdale, PA - EPA Region III
POLREP #4
Final POLREP
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U.S. ENVIRONMENTAL PROTECTION AGENCY
POLLUTION/SITUATION REPORT
North Penn Area 6 - Removal Polrep
Final Removal Polrep

EPA Emergency Response

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
Region III

Subject: POLREP #4
Final POLREP
North Penn Area 6
03W9
Lansdale, PA

To:
From: Kelley Chase, On-Scene Coordinator
Date: 6/28/2018
Reporting Period: 7/23/2016 through 6/28/2018

1. Introduction
  1.1 Background
   
Site Number: 03W9    Contract Number:  
D.O. Number:      Action Memo Date:  
Response Authority: CERCLA    Response Type:  
Response Lead: EPA    Incident Category: Removal Assessment
NPL Status: NPL    Operable Unit:
Mobilization Date:      Start Date: 2/4/2016
Demob Date:      Completion Date: 6/28/2018
CERCLIS ID:    RCRIS ID:
ERNS No.:    State Notification:
FPN#:    Reimbursable Account #:

1.1.1 Incident Category

Removal Assessment

1.1.2 Site Description

The North Penn Area 6 Superfund Site (Site) is largely a groundwater contamination problem encompassing the area in and around the Borough of Lansdale, Pennsylvania. The area is a mix of industrial, commercial and residential properties. The primary contaminants of concern in groundwater are volatile organic compounds (VOCs), including trichloroethylene (TCE) and perchloroethylene (PCE) which are common components of degreasers and solvents.

The Site was added to the National Priorities List (NPL) on March 31, 1989. EPA selected a remedy for the Site in a Record of Decision, signed on August 10, 2000. The remedy includes groundwater extraction and treatment to clean up the contaminated groundwater underlying the Site. The remedy also requires that individual water supply wells affected by the site-related contamination above drinking water standards be provided with connections to the public water supply.

In 2013 and 2014, the EPA Remedial Program conducted sampling at several on-site properties to evaluate the potential for vapor intrusion.  Based on the results of that sampling and given recent changes in screening values for TCE, the EPA Removal Program was asked to further evaluate the potential for vapor intrusion at two properties located within the Site.

Vapor intrusion is the term used to describe the migration of chemical vapors from subsurface contaminated soils and groundwater into the indoor air spaces of overlying buildings through openings in the building foundation. Common sources of VI include petroleum products, dry cleaning solvents, and other industrial solvents and degreasers.

1.1.2.1 Location

The Site is located in Lansdale, Montgomery County, Pennsylvania.

1.1.2.2 Description of Threat

Given the underlying groundwater contamination and based on the results of earlier sampling of indoor air and sub-slab vapor conducted by the EPA Remedial Program, the EPA Removal Program was asked to further evaluate the potential for vapor intrusion at two industrial/commercial properties at the Site.

EPA is coordinating with the Agency for Toxic Substances and Disease Registry (ATSDR).  ATSDR is a federal public health agency under the U.S. Department of Health and Human Services that provides assistance to EPA in evaluating potential human health risks associated with exposure to environmental contaminants.


1.1.3 Preliminary Removal Assessment/Removal Site Inspection Results

On July 23, 2015, On-Scene Coordinator (OSC) Chase and Remedial Project Manager (RPM) Ngo visited the two industrial/commercial properties.  The first property visited was the Rex Heat Treat facility located at 8th & Valley Forge Road in Lansdale.  The second was the Westside Industries facility located at 5th & Mitchell Streets.  The OSC and RPM toured the facilities and identified the locations of earlier sampling efforts.  

The OSC reviewed the results of the earlier sampling and met with the EPA Remedial Program and ATSDR to discuss plans to further evaluate the potential for vapor intrusion at these facilities.    

2. Current Activities
  2.1 Operations Section
   

2.1.1 Narrative

Activities for reporting period beginning August 8, 2015 through March 4, 2016 included the following:

On February 4, 2016, EPA issued a technical direction document to its Superfund Technical Assessment and Response Team (START) contractor, Weston Solutions, Inc., to provide technical assistance to EPA during the assessment of the Site.  The objective of the assessment is to evaluate whether VI is occurring at the facilities, and, if so, whether VOCs are present at concentrations that may pose an unacceptable risk to worker health.

 

On February 23, 2016, the EPA OSC and EPA RPM and a representative of EPA’s START contractor toured the Rex Heat Treat facility along with a facility representative to identify potential sampling locations.  START conducted air monitoring for the presence of VOCs throughout the facility.  

 

On March 2, 2016, EPA returned to the Rex Heat Treat facility to install sub-slab ports to allow for sub-slab vapor sampling. EPA OSC Chase oversaw the installation of sub-slab sampling ports by the START contractor.  A facility representative was on-site to oversee activities.  A total of 5 sub-slab ports were installed throughout the facility.  START conducted air monitoring for the presence of VOCs.

  

On March 3, 2016, EPA and START returned to the facility to set up Summa canisters to collect sub-slab vapor, indoor air and ambient (outdoor) air samples over an 8-hour period of time.  Samples were collected in the front administrative office area, the plant processing areas, plant operator offices and from outside.  A total of 20 Summa canisters, including one duplicate quality assurance/quality control sample, were deployed to collect samples.  The samples are being transported to EPA’s Laboratory in Fort Meade, Maryland to be analyzed for the presence of VOCs.  In addition, START collected a water sample from a sump inside the facility.  The water sample will be analyzed for the presence of VOCs at a EPA approved lab.

Activities for the reporting period beginning March 5, 2016 through July 22, 2016 included the following:

EPA reviewed the results of the sampling conducted at the Rex Heat Treat Facility and provided those results to ATSDR. 

START contractor prepared a final trip report which included a detailed summary of the March 2016 sampling activities and the final validated analytical results.  EPA provided a copy of the final trip report to the property owner.  

While elevated concentrations of chlorinated VOCs were detected in the sub-slab vapor under portions of the plant, EPA did not identify VOCs at concentrations in indoor air that present a health concern to facility workers. 

 
Activities for the reporting period beginning July 23, 2016 through June 28, 2018 included the following:

Discussions with the property owners of the Westside Industries facility and the EPA RPM regarding the need for additional sampling continued.  To, date, access has not been granted.  No further removal assessment activities were conducted during this reporting period. 

2.1.2 Response Actions to Date

No response actions have been conducted pursuant to this Removal Assessment.

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

2.1.4 Progress Metrics

Waste Stream Medium Quantity Manifest # Treatment Disposal
           
           
           


  2.2 Planning Section
   

2.2.1 Anticipated Activities

No further Removal Assessment activities are anticipated.  

 2.2.1.1 Planned Response Activities

No response activities are planned.

 

2.2.1.2 Next Steps

The Removal Assessment will be closed out.

2.2.2 Issues

The property owners did not grant access for EPA to conduct sampling activities at the Westside Industries facility.


  2.3 Logistics Section
    No information available at this time.

  2.4 Finance Section
    No information available at this time.

  2.5 Other Command Staff
    No information available at this time.

3. Participating Entities
  3.1 Unified Command

3.2 Cooperating Agencies

ATSDR


4. Personnel On Site
  No information available at this time.

5. Definition of Terms
  No information available at this time.

6. Additional sources of information
  No information available at this time.

7. Situational Reference Materials
  No information available at this time.