Superfund Information Systems: Site Profile

Superfund Site:

CHEVRON QUESTA MINE
QUESTA, NM

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 SOURCE Record of Decision
December 20, 2010
Chemical Treatment (other, NOS, insitu)
Containment (other, NOS, onsite)
Cover (evapotranspiration)
Cover (soil)
Dewatering
Discharge (other, NOS)
Discharge (surface water/NPDES discharge)
Disposal (offsite)
Drainage/Erosion Control (other, NOS)
Dredging
Excavation
Extraction (recovery/vertical well)
Hydraulic Control (containment)
Institutional Controls
Ion Exchange (P&T, exsitu)
Leachate Control
Membrane Filtration (reverse osmosis, P&T, exsitu)
Monitoring
Neutralization (P&T, exsitu)
Operations & Maintenance (O&M)
Revegetation
Slope Stabilization
Soil Amendments
Solidification/Stabilization (exsitu, onsite)
Treatment (other, NOS, exsitu, onsite)
Treatment (other, NOS, offsite)
Water Supply (temporary replacement, other, NOS)
02 REMOVAL 01 No decision document

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