PROJECT: Island End River Sediment Cap
LOCATION: Boston, MA
RCM SQUARE FT: 35,000
ORGANOCLAY: 135,000 lbs
CONTRACTOR: Sevenson Environmental Services, Inc.
DESIGN CONSULTANT: Arcadis
PRODUCTS: ORGANOCLAY®, REACTIVE CORE MAT®, TRITON® Marine Mattress
The project is situated on a former manufactured gas plant (MGP) site located adjacent to the Boston Harbor. Previous remedial work included dredge and disposal in CAD cell and cap. Persistent sheen resulting from gas ebullition was apparent.
The remediation strategy included the placement of a modular reactive capping system, including Triton® Marine Mattresses used in conjunction with 135,000 lbs of Organoclay® bulk capping material and 35,000 square feet of Reactive Core Mat®, in order to prevent non-aqueous phase liquid (NAPL) contamination from reaching the surface waters. The modified mattress system utilizes Organoclay® filled within the Reactive Core Mat® to adsorb contaminants.