Project Overview

Pre-clearing, excavation and ISS work were completed November 12, 2021.

Prior to the widespread availability of natural gas, gas was “manufactured” through a process of heating coal in specialized ovens. These facilities, called Manufactured Gas Plants (MGP), were common in many urban areas of the United States during the late nineteenth and early twentieth centuries.

PSE&G operated an MGP in the Town of Harrison in Hudson County as a base load plant from 1926 until approximately 1963, when it was converted to peak shaving status. The facility was retired from service in 1987. The MGP was decommissioned in 1992 and the buildings and structures were removed to grade surface.

The Site is presently in use by the following PSE&G units and operations.

  • PSE&G Harrison Gas Distribution headquarters;
  • PSE&G Harrison Appliance Service headquarters;
  • PSE&G natural gas Metering and Regulating station; and
  • An electric substation for the nearby Red Bull Arena.

In 2018, PSE&G conducted a 10-month pilot project on 1.8 acres of the Site to mechanically and chemically stabilize impacted soils at depth to render the constituents immobile. This process is called In Situ Stabilization-Solidification (ISS), and involves mixing of soil in place, below ground, with stabilizing agents such as Portland cement and slag. The ISS remedy meets all NJDEP goals and objectives for addressing contamination, is protective of public health and safety, and is less disruptive to an area as compared to full scale soil excavation.

The objectives of this pilot project were successfully met, and the remediated area was restored by November 2018. 

Based on the successful 2018 Pilot Study, sitewide remediation began in July 2020 to remove soil, treat deeper soils in place, and contain impacted soils near the M&R Station. This work removed approximately 300,000 tons of soil and debris primarily from the top 7 feet to10 feet of the affected areas, as well as remnants of the former plant’s infrastructure.

Deeper impacted soils were treated by ISS. A below-ground hydraulic barrier wall and an environmental cap were installed to contain impacted soils near the M&R Station and its infrastructure.