A.61 Queensbury NMPC

A.61.1 Summary

Environment:	Shoreline
Scale:	Full
Contaminants of Concern:	PCB contamination was found in Hudson River sediment in an area extending 180 ft offshore and 800 ft downstream from the site boundary.
Final Remedy:	Excavated sediments were allowed to drain for a week on constructed dewatering pads.   Contaminated sediment was transported to a commercial off-site landfill (Model City, NY).

A.61.2 Site Description

Year: 1996

Target Volume: 5,000 yd³ 

Actual Volume Removed: 6,800 yd³ 

A.61.3 Remedial Objectives

Remedial objectives were 1ppm for surface sediments and 10ppm for subsurface sediments, below 1 ft of depth.

Contaminated sediment area: 0.3 acre shoreline area

A.61.4 Remedial Approach

Water level was lowered 4 ft to expose the targeted river bank and near shore sediments. This was done by using controls at the nearby Sherman Island Dam.

A.61.5 Monitoring

A reinforced silt fence was installed at water line to prevent water movement. Jersey barriers wrapped with geotextile were installed at the upper inland boundary, and removal was accomplished in between.

PCB concentrations in several fish species declined following remediationThe act or process of abating, cleaning up, containing, or removing a substance (usually hazardous or infectious) from an environment..

The excavated area was backfilled with topsoil and rip-rap. The upland portion was seeded and planted with shrubs and trees.

A.61.6 References

Field, L.J., J.W. Kern, and R.J. Sloan. PCB Concentrations in Fish Following Remediation of a Small Hazardous Waste Site. http://www.darrp.noaa.gov/library/pdf/1452_SETAC_07_Fish_PCB_poster.pdf.

USEPA. Five-Year Review Report for the Niagara Mohawk Power Corporation Superfund Site. Aug 2006. http://www.epa.gov/superfund/sites/fiveyear/f2006020001043.pdf.

USEPA. Five-Year Report for the Niagara Mohawk Power Corporation Superfund Site. SDMS DocID 111359. Aug 2011. http://www.epa.gov/superfund/sites/fiveyear/f2011020004031.pdf.

Major Contaminated Sediment Sites Database; Sept. 2004 as updated 2008. http://www.smwg.org/MCSS_Database/MCSS_Database_Docs.html.

Publication Date: August 2014