Update August, 2011

Operable Unit 1: Operations,
Maintenance and Monitoring Activities Continue
Operable Unit 2: Design Activities Continue
Operable Unit 1 (40 Willow Avenue)

Field activities initiated in December 2009 to study the removal of coal tar from deeper levels within the containment barrier continued through August 2011.  Operations and maintenance (O&M) activities initiated in October 2010 with the installation of three additional shallow recovery wells for pumping the containment cell continued in August.

On-going activities:

  • Continued O&M measures on the cap (maintenance and inspection).

Recently Completed Activities:

  • Collected ground water level measurements at wells throughout OU-1.
  • Completed O&M repairs to OU-1 concrete pad and sheetpiles.
  • Pumped water from the OU-1 containment cell as part of O&M.
  • Collected a groundwater sample at the Lynhurst Avenue property to monitor concentrations following NYSDEC/NYSDOH approved interim remedial measure (IRM).
  • Conducted general housekeeping activities at the Site (OU-1 and OU-2).

Future near-term activities:

  • Continue the collection of water level measurements from monitoring wells throughout OU-1 and vicinity.
  • Prepare the NAPL recovery pilot test report.
  • Continue periodic pumping of OU-1 containment cell as part of O&M.
  • Collect a groundwater sample at the Lynhurst Avenue property to monitor concentrations following the IRM. 

Operable Unit 2 (25 Willow Avenue)

OU-2 is the site of the former manufactured gas plant that previously operated at 25 Willow Avenue and was closed in 1957.  There also are two off-site areas with MGP residuals that are located adjacent to the OU-2 Site at 89 Willow Avenue and across Bay Street at 1 Edgewater Street.  Activities have progressed with the ongoing solicitation of bids from contractors for implementation of the remedial action and Community Air Monitoring during the remedial action activities.

On-going activities:

  • Continued contractor procurement activities for remedial action implementation.
  • Continued pursuit of a storm sewer replacement permit from the New York City Department of Environmental Protection (NYCDEP) for temporary diversion and installation of a replacement storm sewer within OU-2 remediation limits.

Recently completed activities:

  • Conducted a bid meeting and Site walk for contractor bids for implementation of the Community Air Monitoring during the remedial action.

Future near-term activities:

  • Award contracts for the remedial action and Community Air Monitoring.
  • Conduct NYSDEC/NYSDOH-approved Preliminary Design Investigation (PDI) activities on the offsite property located between Edgewater Street, Bay Street, and at the 89 Willow Avenue property.
  • Conduct a baseline survey of vibration and noise in preparation for remedial construction activities for OU-2.

Community Air Monitoring Plan Summary

Operable Unit 1 (40 Willow Avenue)
A Community Air Monitoring Plan (CAMP) is implemented when intrusive activities are performed at Operable Unit 1.  There were no exceedances of the CAMP during OU-1 repair activities.  Copies of previous CAMP reports and other site documents for OU-1 are stored at the two public document repositories for the project.
Operable Unit 2 (25 Willow Avenue)
CAMP is implemented in support of the PDI activities at the OU-2 properties during intrusive work.  There were no intrusive activities at OU-2 during August that required CAMP monitoring.

Community Board 1
One Edgewater Plaza
Room 311
Staten Island, NY 10305
Phone #: (718) 981-6900
Borough President’s Office
Borough Hall
Staten Island, New York 10301
Phone #: (718) 816-2057

If you have any questions or comments about the work on the site, please use the OU-1/ OU-2 Site Telephone Hotline at 718-982-7349.