Salem Acres Superfund Site Wetland Remediation
Salem Acres Superfund Site Wetland Remediation
Salem Acres Superfund Site Wetland Remediation
Salem Acres Superfund Site Wetland Remediation

Wetlands — Salem Acres Superfund Site Wetland Remediation

SALEM, MA — T Ford Company, Inc. (TFCI) was engaged as part of a Design-Build team to remove fly ash sediments from a wetland at a former fly ash disposal site. The source of the sediments was a 25,000 cy fill of fly ash which was excavated and removed by TFCI in a previous contract. Sediments were to be excavated "in the wet" since it was not feasible to dewater the wetland or install a cofferdam. TFCI designed and constructed a lined dewatering pad for stockpiled material. The sediment excavation was performed in cells to minimize the amount of excess water in the material due to excavating "in the wet". Cells were created by leaving a berm of sediments on three sides. The fourth side was the material left in place on the water side which had a low enough fly ash content to be acceptable to EPA and DEP regulations. After the cells were excavated, the berms were removed, allowing the cells to flood.

Site restoration consisted of removing all portions of the stockpile drainage area and truck loading / decontamination area and placement of 6 inches of topsoil. Due to the distance to the edges of the restoration area along the water site, TFCI used a Truck-mounted telescoping conveyor to place the topsoil. This method avoided using mechanized equipment which would have disturbed a larger area.