Superfund Information Systems: Site Profile

Superfund Site:

TUCSON INTERNATIONAL AIRPORT AREA
TUCSON, AZ

Operable Units

Below, EPA has provided a list of the remedial actions selected pertaining to each operable unit.

EPA issues Records of Decision (RODs) to explain which cleanup methods will be used at Superfund National Priorities List sites. EPA has two primary documents that it may use to identify changes to the remedies selected in RODs. EPA uses a ROD Amendment when it needs to make a fundamental change to the remedy. EPA publishes an Explanation of Significant Differences (ESD) for significant changes.

During cleanup, complex sites may be divided into several distinct areas to make the response more efficient. These areas, called operable units (OUs), may address geographic areas, specific problems, or medium (e.g., groundwater, soil) where a specific action is required.

EPA is working to improve data quality. The information presented on this page is undergoing review for accuracy and completeness, and may be subject to change.

OU ID Name Decision Document Cleanup Technologies Selected
in the Decision Document
00 SITEWIDE No decision document
01 GROUNDWATER Record of Decision
August 22, 1988
Aeration Basin (P&T, exsitu)
Containment (other, NOS, onsite)
Discharge (reuse as drinking water)
Discharge (vertical well reinjection to contaminated aquifer)
Monitoring
Water Supply (abandon water supply well)
01 GROUNDWATER Explanation of Significant Differences
February 27, 1997
Air Sparging (physical treatment, insitu)
Discharge (surface water/NPDES discharge)
01 GROUNDWATER Record of Decision Amendment
September 08, 2004
Air Stripping (P&T, exsitu)
Carbon Adsorption (liquid phase, P&T, exsitu)
Discharge (vertical well reinjection to contaminated aquifer)
Extraction (recovery/vertical well)
Monitoring
01 GROUNDWATER Record of Decision Amendment
April 20, 2012
Chemical Oxidation (insitu)
Institutional Controls
Monitored Natural Attenuation
Monitoring
02 SOILS Record of Decision
November 20, 1996
Soil Vapor Extraction (insitu)
02 SOILS Record of Decision
September 30, 1997
Data not available
02 SOILS Explanation of Significant Differences
May 04, 2001
Discharge (reuse as irrigation water)
ESD - Nonfundamental Change (other)
03 AIR FORCE PLANT 44 (AFP 44) Record of Decision
April 03, 1986
Air Stripping (P&T, exsitu)
Discharge (vertical well reinjection to contaminated aquifer)
Extraction (recovery/vertical well)
Ion Exchange (P&T, exsitu)
No Further Action
03 AIR FORCE PLANT 44 (AFP 44) Record of Decision
September 30, 1997
No Further Action
03 AIR FORCE PLANT 44 (AFP 44) Record of Decision
September 29, 1998
Data not available
04 1,4-DIOXANE - PLANT 44 No decision document
05 1,4-DIOXANE - TARP No decision document
06 WEST CAP ISCO REMEDY No decision document

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