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Record of Decision System (RODS)

SANGAMO ELECTRIC DUMP/CRAB ORCHARD NATIONAL WILDLIFE REFUGE (USDOI)

Abstract

Site Name:  SANGAMO ELECTRIC DUMP/CRAB ORCHARD NATIONAL WILDLIFE REFUGE (USDOI)
Address:  EAST OF STATE ROUTE 148 
City & State:  CARTERVILLE  IL  62959
County:  WILLIAMSON
 
EPA ID:  IL8143609487
EPA Region:  05
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/541/R-02/044
ROD Date:  09/12/2002
Operable Unit(s):  04
 
Abstract:  This National Priorities List (NPL) site is known as the Sangamo Electric Dump/Crab Orchard National Wildlife Refuge, Carterville, Illinois. The subjects of this ROD are the following sites from the Miscellaneous Areas Operable Unit (MISCA OU): sites 7, 7A, 8, 9, 10, 11, 11A, 12, 16, 20, 21, 22A, 24, 25, 26, 27, 30, 31, 35, and 36. This decision document presents the selected remedy for site 36 of the MISCA OU at the refuge. Crab Orchard National Wildlife Refuge was established for wildlife conservation and for agricultural, recreational, and industrial purposes.

During WWII, a portion of what is now the refuge was the site of the Illinois Ordnance Plant (IOP), a bomb and munitions manufacturing facility operated by Sherwin Williams Defense Corporation for the War Department. When the war ended in 1945, the site was transferred to the War Assets Administration, and many former IOP buildings were leased to industrial tenants. The Refuge was created in 1947, with multiple missions, including wildlife management, recreational and agricultural use, and industrial operations.
 
Remedy:  The selected remedy for site 36 identified in this ROD addresses the source material that poses the principal threat through excavation and containment in an off-site permitted landfill. The source material identified, as the principal threat is soil and sludge contaminated primarily with PCBs, cadmium, and chromium. The major components of the selected remedy are: demolition of the wastewater treatment plant and disposal of the materials in an off-site permitted landfill; on-site treatment of impounded water to meet state of Illinois general use surface water quality standards and discharge to a nearby stream; excavation and off-site disposal of contaminated material in permitted landfills; testing of the material by the toxicity characteristic leaching procedure; pre-design sampling to fill data gaps identified in the feasibility study report; site restoration including backfilling with clean soils, re-grading, and re-establishment of vegetation; groundwater monitoring until groundwater at site 36 is restored to MCLs for drinking water; and institutional controls to prohibit installation of potable water wells until the groundwater is restored to MCL standards.
 
Text:  View full-text ROD [ 2.75M ]
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