Site Overview

This Superfund Site was used for the production of elemental phosphorous from 1947 until 1981 and encompassed nearly 130 acres on a southern coastline. Envirocon provided excavation of contaminated soils, cell construction and capping, cutoff wall installation, and cove dredging services after safely and reliably completing two previous  projects at the site.

Project Highlights

• Excavated, managed, and consolidated 202,000 cubic yards of highly-combustible pyrophoric phosphate waste, slag, contaminated soil, and debris
• Constructed and capped a 26-acre and an 18-acre RCRA equivalent lined cell where phosphorous waste was placed
• Installed a 2,800-foot groundwater cutoff wall using 20-foot sheets of fiberglass composite sheeting and 1,500 feet of marine bulkhead along the adjacent river
• Excavated impacted sediments to enlarge a cove
• Maintained critical fire suppression protocols and safety procedures as some of the phosphorous material was pyrophoric

Value Delivered

A hard sandstone subsurface was encountered during initial installation of the constructed vinyl sheet pile. Envirocon’s technical experts redesigned the wall to incorporate an increased number of tie-backs and a shallow drive depth. This adapted design and approach reduced the project schedule and saved the client costs on the sheetpile installation.