Superfund Information Systems: Site Profile

Superfund Site:

AEROJET GENERAL CORP.
RANCHO CORDOVA, CA

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. The remedies are displayed for the OU numbers indicated in the original decision document. OU numbers may change over time.

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 Not applicable
01 OVERALL SITE Record of Decision
Data not available
02 AMERICAN RIVER GET No decision document
03 WESTERN GW OU Record of Decision
July 20, 2001
Bioremediation (P&T, other, NOS, exsitu)
Carbon Adsorption (liquid phase, P&T, exsitu)
Discharge (POTW)
Discharge (surface water/NPDES discharge)
Extraction (recovery/vertical well)
Institutional Controls
Monitoring
Treatment (other, NOS, offsite)
Ultraviolet (UV) Oxidation (P&T, exsitu)
Water Supply (permanent replacement, other, NOS)
Water Supply (temporary replacement, other, NOS)
04 AREA 41 SOIL & GW Record of Decision
Data not available
05 PERIMETER GW Record of Decision
February 15, 2011
Air Stripping (P&T, exsitu)
Bioremediation (P&T, other, NOS, exsitu)
Bioremediation (other, NOS, exsitu)
Cap (engineered cap)
Carbon Adsorption (liquid phase, P&T, exsitu)
Chemical Oxidation/Reduction (P&T, exsitu)
Discharge (reuse as process water)
Disposal (offsite)
Excavation
Extraction (recovery/vertical well)
Institutional Controls
Monitoring (soil gas)
Off-gas Treatment (other, NOS)
Soil Vapor Extraction (insitu)
Ultraviolet (UV) Oxidation (P&T, exsitu)
06 BOUNDARY OU GW & SOIL Record of Decision
July 22, 2015
Cap (engineered cap)
Disposal (offsite)
Excavation
Institutional Controls
Positive Building Pressurization (HVAC System Adjustment) (for VI mitigation)
Soil Vapor Extraction (insitu)
Vapor Intrusion Mitigation (other, NOS)
07 ISLANDS OU GW & SOIL Record of Decision
Data not available
08 EASTERN OU GW & SOIL Record of Decision
Data not available
09 CENTRAL OPERABLE UNIT Record of Decision
Data not available
10 AREA 40 Record of Decision
Data not available
11 VI INVESTIGATION Record of Decision
Data not available

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