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.