Glossary 
ACE 
Acute-to-Chronic Estimation 
ACWI 
Advisory Committee on Water Information 
AED 
Atlantic Ecology Division 
AhR 
Aryl hydrocarbon Receptor 
APG 
Annual Performance Goal 
APM 
Annual Performance Measure 
AQUIRE 
AQUatic toxicity Information REtrieval 
AVS 
Acid Volatile Sulfide 
BAF 
Bioaccumulative Accumulation Factor 
BASINS 
Better Assessment Science Interacting Point and Nonpoint Sources 
BLM 
Biotic Ligand Model 
BO 
Biological Opinion 
BSAF 
Bioaccumulative Sediment Accumulation Factor 
CADDIS 
Casual Analysis and Diagnosis Decision Information System 
CENR 
Committee on Environment and Natural Resources 
CFR 
Clark Fork River 
CTR 
California Toxics Rule 
CWA 
Clean Water Act 
CWAP 
Clean Water Action Plan 
DEM 
Digital Evaluation Model 
DO 
Dissolved Oxygen 
EC50 
Effective Concentration (50%) 
ECOTOX 
Ecological Toxicity Database 
EDNA 
Elevation Derivatives for National Applications 
ELS 
Early Life Stage 
EMAP 
Environmental Monitoring and Assessment Program 
EPT 
Ephemeroptera, Plecoptera, Trichoptera 
EqP 
Equilibrium Partitioning 
ESA 
Endangered Species Act 
ESG 
Equilibrium-partioning Sediment Guideline 
FGDC 
Federal Geographic Data Committee 
FTE 
Full Time Equivalent 
FWS 
Fish and Wildlife Service 
GAP 
Gap Analysis Program 
GC/MS 
Gas Chromatography/Mass Spectrometry 
GED 
Gulf Ecology Division 
GIS 
Geographic Information System 
GLEI 
Great Lakes Environmental Indicators 
GPRA 
Government Performance and Results Act 
HAB 
Harmful Algal Bloom 
HAPR 
Habitat Alteration Population-Response Model 
HUC 
Hydrologic Unit Code 
IBI 
Indices of Biotic Integrity 
XI 
