Design and construction of the site-wide remedy as described in the Record of Decision issued by the U.S. Environmental Protection Agency (USEPA) on September 27, 2012 is underway.
- Construction of the bedrock and overburden groundwater containment, extraction, treatment, and reinjection system, a major component of the site-wide remedy, is complete and the system is fully operational. The dedicated on-site groundwater treatment facility, located on Polhemus Lane in Bridgewater, will be operated long-term and groundwater will be monitored pursuant to requirements set forth by USEPA and New Jersey Department of Environmental Protection (NJDEP).
- Pre-design and design activities related to the site-wide soils remedy, including design of the stabilization/solidification treatment process for waste materials located in Impoundments 3, 4 and 5, will occur in 2022.
Impoundments 1 and 2
On September 25, 2018, the USEPA issued a Record of Decision (ROD) for Operable Unit 8 (OU8), commonly referred to as Impoundments 1 and 2. USEPA and Wyeth Holdings LLC (WH) executed an Administrative Order on Consent on September 30, 2019 that allows WH to move forward with design and engineering for the remedy as described in the ROD.
- In 2020, as part of the remedial design phase, a field demonstration of the remedy was performed. Information was collected to support the remedial design, such as the rate of material removal and preferred containers for shipping of the dewatered material to off-site treatment facilities. The demonstration work was safely completed and met air quality standards approved by both USEPA and NJDEP.
- A larger scaled-up campaign is being performed to refine the remediation process and collect additional data for the final design. Following the removal of tar material, a portion of the remaining clay/soil and berm material adjacent to the area where tar material was just removed will be treated using In-situ Stabilization and Solidification to demonstrate the final treatment step described in the USEPA-selected remedy. Staging and set up for the demonstration project began in March 2021 and continued through April. Material excavation, dewatering and off-site transport began on May 21, 2021 and is expected to extend through this year.
Impoundment 8 Facility
The Impoundment 8 Facility, located on Polhemus Lane, was designed to receive material exclusively from other areas of the Site as part of a multi-phase remediation program. The facility is regulated under the Resource Conservation and Recovery Act (RCRA) and work is addressed with oversight by the NJDEP, and the concurrence of the USEPA.
Less than 40% of the facility has been used to receive materials remediated during earlier remedial actions on the site, with the remaining capacity unused. Based upon USEPA’s selected remedies, the Impoundment 8 Facility will not receive any more material. Therefore, Wyeth is moving forward with plans to implement a final closure and post-closure care plan in accordance with RCRA regulations.
- WH is implementing a NJDEP-approved Remedial Action Work Plan which calls for a portion of the material within the Impoundment to be redistributed and regraded to lower the profile, improve aesthetics and allow for stormwater management. A final impermeable cover system will be put in place, along with a vegetative cover. Work is expected to continue through the end of the year.
- As of June 30, 2021, approximately 90% of the material within the impoundment has been redistributed. A commonly used misting solution is applied during intrusive work to help suppress odors. Material redistribution activities have triggered alerts during the past month, generally at CAMP monitors located directly adjacent to the work zone. The team immediately took mitigation measures, including stop-work and additional dust and odor suppression. The NJDEP and USEPA were notified of each occurrence. Laboratory results received to date have reported concentrations associated with these activities below established air quality criteria.
- To minimize odors in the nearby neighborhood, whenever possible, material relocation activities are suspended when winds blow toward the north/northwest. Due to the periodic suspension of material relocation based on wind direction, Phase 1 work is now anticipated to be completed by July 9th.