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Glossary of Terms and Abbreviations in Reregistration

Alphabetical listing of glossary terms and abbreviations in reregistration.
Term or Abbreviation Description
AE Acid Equivalent
ai ® Active Ingredient
AGDCI Agricultural Data Call-In
ai Active Ingredient
aPAD Acute Population Adjusted Dose
AR Anticipated Residue
ARC Anticipated Residue Contribution
BCF Bioconcentration Factor
CAS Chemical Abstracts Service
CI Cation
CNS Central Nervous System
cPAD Chronic Population Adjusted Dose
CSF Confidential Statement of Formula
CFR Code of Federal Regulations
CSFII USDA Continuing Surveys for Food Intake by Individuals
DCI Data Call-In
DEEM Dietary Exposure Evaluation Model
DFR Dislodgeable Foliar Residue
DRES Dietary Risk Evaluation System
DWEL Drinking Water Equivalent Level (DWEL). The DWEL represents a medium specific (i.e., drinking water) lifetime exposure at which adverse, noncarcinogenic health effects are not anticipated to occur.
DWLOC Drinking Water Level of Comparison.
EC Emulsifiable Concentrate Formulation
EEC Estimated Environmental Concentration. The estimated pesticide concentration in an environment, such as a terrestrial ecosystem.
EP End-Use Product
EPA U.S. Environmental Protection Agency
FAO Food and Agriculture Organization
FDA Food and Drug Administration
FIFRA Federal Insecticide, Fungicide, and Rodenticide Act
FFDCA Federal Food, Drug, and Cosmetic Act
FQPA Food Quality Protection Act
FOB Functional Observation Battery
G Granular Formulation
GENEEC Tier I Surface Water Computer Model
GLC Gas Liquid Chromatography
GLN Guideline Number
GM Geometric Mean
GRAS Generally Recognized as Safe as Designated by FDA
HA Health Advisory (HA). The HA values are used as informal guidance to municipalities and other organizations when emergency spills or contamination situations occur.
HAFT Highest Average Field Trial
HDT Highest Dose Tested
IR Index Reservoir
Kow Octanol-water partition coefficient
LC50 Median Lethal Concentration. A statistically derived concentration of a substance that can be expected to cause death in 50% of test animals. It is usually expressed as the weight of substance per weight or volume of water, air or feed, e.g., mg/l, mg/kg or ppm.
LD50 Median Lethal Dose. A statistically derived single dose that can be expected to cause death in 50% of the test animals when administered by the route indicated (oral, dermal, inhalation). It is expressed as a weight of substance per unit weight of animal, e.g., mg/kg.
LEL Lowest Effect Level
LOC Level of Concern
LOD Limit of Detection
LOAEL Lowest Observed Adverse Effect Level
MATC Maximum Acceptable Toxicant Concentration
MCLG Maximum Contaminant Level Goal (MCLG). The MCLG is used by the Agency to regulate contaminants in drinking water under the Safe Drinking Water Act.
mg/kg/day Milligram Per Kilogram Per Day
mg/L Milligrams Per Liter
mm/Hg Millimeters of Mercury. This is a measure of vapor pressure.
MOE Margin of Exposure
MP Manufacturing-Use Product
MPI Maximum Permissible Intake
MRID Master Record Identification (number). EPA's system of recording and tracking studies submitted.
NA Not Applicable
N/A Not Applicable
NAWQA USGS National Water Quality Assessment
NOEC No Observable Effect Concentration
NOEL No Observed Effect Level
NOAEL No Observed Adverse Effect Level
NPDES National Pollutant Discharge Elimination System
NR Not Required
OP Organophosphate
OPP EPA Office of Pesticide Programs
OCSPP EPA Office of Chemical Safety and Pollution Prevention
Pa pascal. The pressure exerted by a force of one newton acting on an area of one square meter.
PAD Population Adjusted Dose
PADI Provisional Acceptable Daily Intake
PAG Pesticide Assessment Guideline
PAM Pesticide Analytical Method
PCA Percent Crop Area
PDP USDA Pesticide Data Program
PHED Pesticide Handler's Exposure Data
PHI Preharvest Interval
ppb Parts Per Billion
PPE Personal Protective Equipment
ppm Parts Per Million
PRN Pesticide Registration Notice
PRZM /
EXAMS Tier II Surface Water Computer Model
Q1* The Carcinogenic Potential of a Compound, Quantified by the EPA's Cancer Risk Model
RAC Raw Agriculture Commodity
RBC Red Blood Cell
RED Reregistration Eligibility Decision
REI Restricted Entry Interval
RfD Reference Dose
RQ Risk Quotient
RS Registration Standard
RUP Restricted Use Pesticide
SAP Science Advisory Panel
SCI-GROW Tier I Ground Water Computer Model
SF Safety Factor
SLC Single Layer Clothing
SLN Special Local Need (Registrations Under Section 24© of FIFRA)
TC Toxic Concentration. The concentration at which a substance produces a toxic effect.
TD Toxic Dose. The dose at which a substance produces a toxic effect.
TEP Typical End-Use Product
TGAI Technical Grade Active Ingredient
TLC Thin Layer Chromatography
TMRC Theoretical Maximum Residue Contribution
torr A unit of pressure needed to support a column of mercury 1 mm high under standard conditions.
TRR Total Radioactive Residue
UF Uncertainty Factor
g/g Micrograms Per Gram
g/L Micrograms Per Liter
USDA United States Department of Agriculture
USGS United States Geological Survey
UV Ultraviolet
WHO World Health Organization
WP Wettable Powder
WPS Worker Protection Standard

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