Clifton, Staten Island Manufactured Gas Plant (MGP) Site

Site Activities Update - July 25, 2016

National Grid's contractor will be on-site at the Edgewater Plaza parking lot, conducting a Community Air Monitoring Program (CAMP) while the property owner conducts a geotechnical survey.  The CAMP monitors for particulate matter and volatile organic compounds, and work is stopped if any of the identified limits are exceeded.  Since the geotechnical survey is a minimally intrusive activity, we do not anticipate a large disturbance to soils in this area, and there have been no CAMP exceedances during the work so far.  Edgewater Plaza is an off-site area, adjacent OU-2.  The work is expected to take approximately 2 weeks.

(See the Community Air Monitoring Plan on the Key Documents - Major Reports OU-2 tab.)  National Grid is committed to protecting the public, and workers and contractors, during work at the Site.  National Grid's monitoring and work is managed with approval and oversight from the NYSDEC and the New York State Department of Health.

National Grid maintains a telephone hotline for the site, 718-982-7349, for any questions or comments from the community.

Remediation Work Completion

National Grid completed the remediation work at the former Clifton MGP site in July 2015. The NYSDEC and the NYSDOH have approved the Construction Completion Report for the 25 Willow Avenue, 40 Willow Avenue, and 89 Willow Avenue properties.  National Grid has submitted a Draft Site Management Plan and Draft Final Engineering Report for the former Clifton MGP Site to the NYSDEC. The Site Management Plan, once finalized and approved by the NYSDEC and the NYSDOH, will be implemented on the National Grid properties and off-site areas as called for within the document.

On-going Operation, Maintenance & Monitoring Activities

Post-remediation work includes establishing and conducting Operation, Maintenance & Monitoring (OM&M) programs.   The OM&M programs at the Former Clifton MGP Site include:

  • Recovery of Dense Non-aqueous Phase Liquid (DNAPL);
  • Groundwater Extraction at 40 Willow Avenue; and
  • Groundwater Sampling.

OM&M activities are required by the NYSDEC and the NYSDOH as documented in the Site Management Plan.  You may see work being conducted at the former Clifton MGP site in order to implement and maintain these OM&M programs.  National Grid will implement the OM&M programs until otherwise directed by the NYSDEC and the NYSDOH.

Website Updates

Periodically, National Grid will provide activity updates for the neighbors of the Former Clifton MGP Site. These updates will primarily consist of the addition of new Operations, Maintenance, and Monitoring (OM&M) Reports to this website. The updates will describe work that has been done since the completion of the remediation work. The Key Documents section of this website will include the past website Weekly Updates and the reports related to the remediation work.