Update May, 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 May 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 May.
On-going activities:

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

Recently Completed Activities:

  • Collected ground water level and non-aqueous phase liquid (NAPL) measurements at wells throughout OU-1 and vicinity to optimize future O&M activities.
  • 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 completion of the NYSDEC/ NYSDOH-approve interim remedial measure (IRM).
  • Conducted general housekeeping activities at the Site (OU-1 and OU-2).

Future near-term activities:

  • Continue maintenance and inspection of the OU-1 containment cell concrete cap.
  • Continue the collection of water level measurements from monitoring wells throughout OU-1 and vicinity.
  • Complete O&M repairs to OU-1 concrete pad and sheet piles.
  • Continue the evaluation of NAPL recovery pilot test data.
  • Complete 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.  The remedial design activities have progressed with the ongoing preparation of the submittal of the 100% Design Specifications and Drawings to NYSDEC and NYSDOH scheduled for May 2011.

On-going activities:

  • Continue OU-2 remedial design activities and preparation of the 100% Design Specifications and Drawings.

Recently completed activities:

  • Submitted a storm sewer replacement permit application to NYCDEP for temporary diversion and installation of a replacement storm sewer within OU-2 remediation limits.
  • Submitted responses to NYSDEC/NYSDOH comments on the 90% Design.

Future near-term activities:

  • Complete the OU-2 100% Remedial Design Specifications and Drawings for solicitation of bids from qualified contractors.
  • Complete a survey of the shoreline area adjacent to 1 Edgewater Street.
  • Conduct NYSDEC/NYSDOH-approved Preliminary Design Investigation (PDI) activities on the offsite property located between Edgewater Street, Bay Street, and Camden Street and at the 89 Willow Avenue property.

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 activities at OU-1 during May that required CAMP monitoring.  Copies of previous weekly 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)

A Community Air Monitoring Plan (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 March 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