Environmental assessment of the Environmental Restoration Project at Sandia National Laboratories/New Mexico Page: 15 of 363

                                
GLOSSARY (Continued)

Recovery Act (RCRA) Section 3008(h). A CAMU shall be used only for the management of
remediation wastes pursuant to implementing such corrective action requirements at the
facility.
Capping: The process of covering and sealing.
Carbon Dioxide Blasting: A physical process used to remove surface contamination from
debris by blasting the surface with pelletized carbon dioxide.
Catalytic Converter: A device that uses a catalyst to facilitate chemical reactions that convert
hazardous or undesirable compounds to nonhazardous compounds.
Cation: A positively charged ion (such as H+).
Cationic Exchange Media: A resin with a negatively charged matrix and positive ions
(cations, usually hydrogen ions), which exchange positions with positively charged ions
(contaminants, in this case) present in the solution being passed through it.
Chemical Process: Pertaining to treatment of waste, a treatment technology that uses
chemicals under controlled conditions to facilitate reactions that produce less hazardous or
nonhazardous compounds.
Chronic Daily Intake: Exposure expressed as the mass of a substance contacted per unit
body weight per unit time, averaged over a long period of time (as a Superfund program
guideline, seven years to a lifetime).
Reference Dose (RfD): An estimate (with uncertainty spanning perhaps an order of
magnitude or greater) of a daily exposure level for the human population, including sensitive
subpopulations, that is likely to be without an appreciable risk of deleterious effects during a
lifetime. Chronic RfDs are developed specifically to be protective for long-term exposure to a
compound.
Component: Those artifacts and features at an archaeological site that display a similarity of
style and temporal period, indicating the occupation of the site by a discrete cultural group.
Contact Rate: Amount of medium (soil) contacted per unit time or event (e.g., kilograms of
soil ingested per day).
Contaminant of Concern (CoC): General type of chemical or radionuclide known to be
present at waste sites based on site investigations and historical information about site use.
Corrective Action Management Unit: See CAMU.
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