Air Monitoring

Perimeter Air Monitoring Program Overview
During remediation activities, PSE&G takes steps necessary to mitigate airborne contaminants through the use of water mist, odor controlling foams, tarps, or temporarily stopping work until conditions improve to ensure our work does not impact the community.


Purpose of Perimeter Air Monitoring
To be protective of public health and safety, PSE&G implements a Perimeter Air Monitoring Plan, designed by a third party to the specifics of the Site’s conditions and duration of the phase of remediation. The plan is approved by the Site’s New Jersey Licensed Site Remediation Professional of record.


The purpose of the Perimeter Air Monitoring is to measure potential airborne emissions of vapors, polycyclic aromatic hydrocarbons (PAHs), and dust. These measurements are compared to the alarm conditions and the action levels. The alarm levels serve as an early indicator to take action to ensure levels at the site perimeter do not exceed the applicable United States Environmental Protection Agency (EPA) Region 2 carcinogenic residential air regional screening levels and New Jersey Department of Environmental Protection Short-Term Inhalation Exposure Reference Concentrations. The second are the applicable site-specific chronic action levels calculated for the project based upon the EPA carcinogenic residential air regional screening level equation.


Locations of Perimeter Air Monitoring Stations
Perimeter air monitoring stations were used throughout the duration of the pilot project. They were located along the perimeter of the project area at the North, South, East and West sides, and between the project area and the closest building.


Posting of the Weekly Report
PSE&G makes the Perimeter Air Monitoring Plan and results of its Perimeter Air Monitoring available to the public while work is being performed. Both real time screening level results and confirmatory data are collected for evaluation of contaminant levels in air. The results posted here from January through November 2018 were the running average of the weekly confirmatory analytical results through the completion of the pilot project, and certified by the New Jersey laboratory SGS Accutest in accordance with the appropriate EPA, Occupational Safety and Health Administration (OSHA), and National Institute of Occupational Safety and Health (NIOSH) air sampling methods. Posting of results will resume when air monitoring commences in 2019, in concert with the next phase of remediation.


Perimeter Air Monitoring Sampling – Chronic Action Level Data 
The Chronic Action Level represents the safe exposure limit to an individual at the site perimeter over the entire estimated duration of the project. The running average below represents the actual average of the weekly confirmatory sampling results received through the completion of the pilot project.  These results are summarized and compared to the chronic action level developed for the site. This level was derived for the site, based upon the EPA’s carcinogenic residential air regional screening level equation.


Perimeter Air Monitoring Sampling Chronic Action Level Data

 Benzene (µg/m3)Naphthalene (µg/m3)
Chronic Action Level90.4 µg/m317.5 µg/m3
Current Running Average11.49 µg/m39.31 µg/m3

Last Sample Was Collected November 8, 2018