Air Monitoring

Perimeter Air Monitoring Program Overview

During remediation, PSE&G took steps necessary to mitigate airborne constituents through the use of water mist, odor controlling foams, tarps, or temporarily stopping work until conditions improved to ensure our work did not impact the community. Air monitoring was completed in March 2022.

Purpose of Perimeter Air Monitoring

To be protective of public health and safety, PSE&G implemented a site-specific Perimeter Air Monitoring Plan. The plan is designed for the specifics of the planned site activity and is approved by the project’s New Jersey Licensed Site Remediation Professional. 

The purpose of Perimeter Air Monitoring was to measure potential airborne emissions of vapors, polycyclic aromatic hydrocarbons (PAHs), and dust. These measurements were compared to the alarm conditions and the action levels. The alarm levels served 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  applicable site-specific chronic action levels were calculated for the project based upon the EPA carcinogenic residential air regional screening level equation.

Locations of Perimeter Air Monitoring Stations

During remediation work, there were always a minimum of five air monitoring stations. With site restoration complete, air monitors were removed in March 2022.  

Perimeter Air Monitoring Sampling – Chronic Action Level Data 

The Chronic Action Level represented the safe exposure limit to an individual at the site perimeter over the entire estimated duration of the project. The current running average represented the actual average of the weekly confirmatory sampling results until air monitoring was complete.  These results were 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.

Both real time screening level results and confirmatory data were collected for evaluation of contaminant levels in air. The results posted here were the current running average of the weekly confirmatory analytical results, certified by the New Jersey laboratory Alpha Analytical in accordance with the appropriate EPA, Occupational Safety and Health Administration (OSHA), and National Institute of Occupational Safety and Health (NIOSH) air sampling methods. Only validated laboratory reports were posted. 

Perimeter Air Monitoring Sampling Chronic Action Level Data

 Benzene (µg/m3) as of 3/1/22Naphthalene (µg/m3) as of 3/1/22
Chronic Action Level149 14.9
Current Running Average6.444.91