Superfund Information Systems: Site Profile

Superfund Site:

PETRO-CHEMICAL SYSTEMS, INC. (TURTLE BAYOU)
LIBERTY, TX

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 FRONTIER PARK ROAD Record of Decision
March 27, 1987
Disposal (offsite)
Excavation
Population Relocation (temporary)
02 SITE Record of Decision
September 06, 1991
Air Sparging (physical treatment, insitu)
Cap (engineered cap)
Drainage/Erosion Control (other, NOS)
Monitoring
Off-gas Treatment (other, NOS)
Soil Vapor Extraction (insitu)
Vertical Engineered Barrier (slurry wall)
02 SITE Record of Decision Amendment
April 30, 1998
Bioremediation (other, NOS, exsitu)
Bioremediation (other, NOS, insitu)
Bioventing (insitu)
Cap (engineered cap)
Disposal (offsite)
Excavation
Institutional Controls
Monitored Natural Attenuation
Monitoring
Soil Washing (exsitu)
Thermal Desorption (exsitu, onsite)
Treatment (other, NOS, offsite)
02 SITE Record of Decision Amendment
September 22, 2006
Chemical Oxidation (insitu)
Containment (other, NOS, onsite)
Engineering Control (other, NOS)
Excavation
Institutional Controls
Monitoring
Off-gas Treatment (other, NOS)
02 SITE Explanation of Significant Differences
September 23, 2010
Bioremediation (other, NOS, exsitu)
Chemical Oxidation (insitu)
Excavation
02 SITE Explanation of Significant Differences
August 17, 2012
ESD/Amd - TI Waiver Clarification/Change
02 SITE Explanation of Significant Differences
August 22, 2012
ESD/Amd - TI Waiver Clarification/Change
03 GROUND WATER ONLY No decision document
04 BAYOU DISPOSAL AREA No decision document

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