ATSDR - PHA - Boomsnub/Airco, Vancouver, Clark County, Washington

ABBREVIATIONS AND ACRONYMS

ATSDR Agency for Toxic Substances and Disease Registry

CREG Cancer Risk Evaluation Guide (promulgating agency ATSDR). CREGs are estimated contaminant concentrations based on a one excess cancer in a million persons exposed over a lifetime (70 years). CREGs are calculated from EPA's cancer slope factors.

CPU Clark Public Utilities

Ecology Washington State Department of Ecology

EMEG Environmental Media Evaluation Guide (promulgating agency ATSDR). EMEGs are screening values used to select chemical contaminants of potential health concern. EMEGs are estimated contaminant concentrations in particular media at which daily exposure would be unlikely to result in non-cancer health effects. EMEG values are calculated by ATSDR using conservative exposure assumptions that would protect the most sensitive segment of the population.

EPA U.S. Environmental Protection Agency

MRL ATSDR developed Minimal Risk Levels (MRLs) to evaluate health effects of chemical contaminants commonly found at hazardous waste sites. MRLs are estimates of daily exposure to contaminants below which non-cancer, adverse health effects are unlikely to occur.

mg/kg milligrams per kilogram, equivalent to ppm (see below)

ppm parts per million (10E-6) one second in 11 & 1/2 days

RfD Reference Dose (EPA). EPA's Reference Dose (RfD) and Reference Concentration (RfC) are estimates of the daily exposure to a contaminant that is unlikely to cause adverse health effects.

RMEG Reference Dose-based Media Evaluation Guide calculated using Reference Dose (RfD) (definition above).

WDOH Washington State Department of Health

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Agency for Toxic Substances and Disease Registry, 1825 Century Blvd, Atlanta, GA 30345
Contact CDC: 800-232-4636 / TTY: 888-232-6348

Department of Health and Human Services

ATSDR	Agency for Toxic Substances and Disease Registry
CREG	Cancer Risk Evaluation Guide (promulgating agency ATSDR). CREGs are estimated contaminant concentrations based on a one excess cancer in a million persons exposed over a lifetime (70 years). CREGs are calculated from EPA's cancer slope factors.
CPU	Clark Public Utilities
Ecology	Washington State Department of Ecology
EMEG	Environmental Media Evaluation Guide (promulgating agency ATSDR). EMEGs are screening values used to select chemical contaminants of potential health concern. EMEGs are estimated contaminant concentrations in particular media at which daily exposure would be unlikely to result in non-cancer health effects. EMEG values are calculated by ATSDR using conservative exposure assumptions that would protect the most sensitive segment of the population.
EPA	U.S. Environmental Protection Agency
MRL	ATSDR developed Minimal Risk Levels (MRLs) to evaluate health effects of chemical contaminants commonly found at hazardous waste sites. MRLs are estimates of daily exposure to contaminants below which non-cancer, adverse health effects are unlikely to occur.
mg/kg	milligrams per kilogram, equivalent to ppm (see below)
ppm	parts per million (10E-6) one second in 11 & 1/2 days
RfD	Reference Dose (EPA). EPA's Reference Dose (RfD) and Reference Concentration (RfC) are estimates of the daily exposure to a contaminant that is unlikely to cause adverse health effects.
RMEG	Reference Dose-based Media Evaluation Guide calculated using Reference Dose (RfD) (definition above).
WDOH	Washington State Department of Health