Location: Taunton, MA
- Sudden release of 4,000 gallons of ferric chloride used for pH adjustment at a wastewater treatment plant.
- Release occurred during major rainfall event, which caused significant dispersal into the plant’s stormwater control system to a detention pond and into adjacent wetlands.
- Subsequent freezing temperatures added significant difficulty to response efforts.
Pavement, structures, and other infrastructure were affected by the very acidic liquid (pH<1).
- Over 250 cubic yards of impacted soil and 300,000 gallons of impacted surface water were removed, treated and appropriately disposed.
- The area was neutralized using hydrated lime. Approximately 2,000 gallons of hydrated lime were required to stabilize the ferric chloride.
- The detention basin required significant remediation complicating stormwater management during remediation efforts.
Services provided by OHI
- Licensed Site Professional (LSP) services to maintain compliance with the Massachusetts Contingency Plan.
- Coordination with Federal, State, and Local Regulatory officials during and after initial emergency response actions.
- Preparation of regulatory filings submitted to the MassDEP and local Conservation Commission.
- Design, implementation, and oversight of remedial measures to collect, treat, and stabilize the area affected by the release.
- Long-term monitoring to ensure that the environment had been restored to pre-release conditions and preparation of a Class A-1 Response Action Outcome (RAO) Statement.