AUS
OU - Additional and Uncharacterized Sites Operable
Unit
DOI formed the AUS
OU from 1997 to 1999 to address potential releases of hazardous substances not
included in existing OUs at the Refuge. The AUS OU sites are spread throughout
the former Illinois Ordnance Plant area and include former manufacturing
facilities, industrial storage areas, and disposal areas. The Preliminary
Assessment/Site Inspection (PA/SI) revealed elevated levels of heavy metals and
pesticides in soils and concentrations of solvents, including trichloroethylene
(TCE), exceeding groundwater regulatory standards. Thirty-two sites are
recommended for remedial investigation. An Administrative Order on Consent (AOC)
was entered into with General Dynamics Ordnance & Tactical Systems (GDO&TS) for
performance of the RI/FS at the AUS OU with USFWS conducting the baseline risk
assessment. The Remedial Investigation/Feasibility Study (RI/FS) will further define the nature and extent of
contamination.
AUS OU Overview Map (730 KB PDF file)
Acronyms
The following documents can be found
at:
Southern Illinois University
(618) 453-2818
McLafferty Annex
1830 University Press Drive
Carbondale, Illinois 62901
Hours: Monday - Friday 9:00
a.m. - 5:00 p.m.
U.S. Fish & Wildlife Service
(618) 997-3344
Crab Orchard National Wildlife Refuge
6987 Headquarters Road
Marion, Illinois 62959
Hours: Monday - Friday 8:00 a.m. - 4:00 p.m.
The following are downloadable
documents in Adobe Acrobat format.
2003 AUS
Administrative Order on Consent for Remedial
Investigation/Feasibility Study
2006 AUS Final Remedial
Investigation/Feasibiltiy Study Work Plan
Quality Assurance
Project Plan Addendum
2003 Final Preliminary
Assessment/Site Inspection Report
2003 Area 7
2006
Five Year Review (4.3 MB PDF
file)
2006
Investigation of AUS OU Factsheet
(123 KB PDF file)
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