Air Monitoring

Perimeter Air Monitoring Program Overview

During remediation activities, PSE&G is taking steps necessary to mitigate airborne constituents 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 is implementing 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. It will be in place throughout the duration of the project.

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  applicable site-specific chronic action levels are calculated for the project based upon the EPA carcinogenic residential air regional screening level equation.

Locations of Perimeter Air Monitoring Stations

When remediation work is performed, there are always a minimum of five air monitoring stations. There are currently eight air monitoring stations  located along each of the north, east, south and west sides of the work area perimeters. Monitors may be moved as work areas change. 

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 current running average represents the actual average of the weekly confirmatory sampling results received to date.  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.

Both real time screening level results and confirmatory data are collected for evaluation of contaminant levels in air. The results posted here are 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 are posted. The analysis process for Naphthalene is more complex than that of Benzene and typically takes longer. As a result the dates of the running average may differ by several weeks.

Perimeter Air Monitoring Sampling Chronic Action Level Data

 Benzene (µg/m3) as of 9/15/21Naphthalene (µg/m3) as of 8/31/21
Chronic Action Level149 14.9
Current Running Average7.724.59