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Palos Verdes Shelf Pilot Capping Project Los Angeles County, California

Beneficial Uses: Capping
Use of dredged materials to test the concept of capping in place contaminated sediments at the Palos Verdes Shelf Superfund Site
Lead Agency: San Francisco District
Placement Date(s): Construction of the pilot cap completed September 2001, monitoring still ongoing
Location: Palos Verdes Shelf, California
Placement Method: Hydraulic, split-hull barge
Substrate Type: Silty sands
Energy Source: Pacific Ocean
Project Size: 135,000 cubic yards
Project Costs: Not known, monitoring still underway
Monitoring: Monitoring of the sediment placement is still ongoing
Comments: This was a project conducted for the USEPA, Office of Superfund. The purpose of the project was to test the ability to cap contaminated sediments in place as a potential cleanup action for a listed Superfund site. Three "cells" were capped with varying cap thicknesses, sediment types, and placement methods.
References:

  • USACE (2002.) "Field Pilot Study of In Situ Capping of Palos Verdes Shelf Contaminated Sediments," ERDC TR-02-5, U.S. Army Engineer Research and Development Center., Vicksburg, MS
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