A.58 Pioneer Lake, OH

A.58.1 Summary

Environment:	Freshwater
Scale:	Full
Contaminants of Concern:	VOC PAH (as high as 742 ppm) BTEX ranges from 123–1,873 ppm Coal tar
Final Remedy:	Hydraulic cutterhead dredge. Water treatment consisted of pumping dredged water from settling basin through carbon filter units.   Phase 1: 556 tons of nonhazardous coarse sediments–Williams County Landfill   189,450 gallons of nonhazardous pumpable sludge–City Environmental   Phase 2: 916 tons of coarse sediment–WCL 226,911 gallons of nonhazardous pumpable sludge–Evergreen RDF 4,360 tons of solidified sludge (including 1,193 tons of kiln dust) –Evergreen   Treatment process continued until limits were met and water could be released into lake.

A.58.2 Site Description

Lake sediment, sand, gravel pit

Year: 1997

Target Volume: 6,600 yd³ 

Actual Volume Removed: 6,600 yd³

A.58.3 Remedial Objectives

< 1x10^-4 excess lifetime cancer risk value in lake sediment resulting in target levels:

Ethylbenzene: 480 ppm

Toluene: 970 ppm

Total xylene: 9700 ppm

Naphthalene: 360 ppm

Fluorine: 360 ppm

Anthracene: 2700 ppm

Fluoranthene: 360 ppm

Pyrene: 270 ppm

Contaminated sediment thickness: 0.5-3 ft

Contaminated sediment area: 1 acre located in the southern portion of the Pioneer Lake

Also, a 60x50x8 ft asphalt pit located on shore.

A.58.4 Remedial Approach

Hydraulic cutter head dredge

A.58.5 Monitoring

Resuspension:

Silt curtains were used to control suspension. 18 inch skirted floating absorbent boom used to contain contaminants.

Performance:

There were two phases for this project.

All contaminants were co-located so dredging accounted for them all.

Residuals:

No cappingTechnology which covers contaminated sediment with material to isolate the contaminants from the surrounding environment. was needed for this site since goals were reached after dredging was completed.

A.58.6 References

Stafford, Carolyn. EPA to clean up Lake Pioneer. The Bryan Times, Sep 22, 1995, Vol 47, No. 224. Bryan, OH. http://news.google.com/newspapers?nid=799&dat=19950922&id=QKFTAAAAIBAJ&sjid=oIcDAAAAIBAJ&pg=6034,4931630.

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

Publication Date: August 2014