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122 µm micrometer AADT average annual daily traffic AASHTO American Association of State Highway and Transportation Officials Ac acre AgBMPDB Agricultural Best Management Practices Database Al aluminum As arsenic ATTAINS Assessment, Total Maximum Daily Load Tracking and Implementation System BDL below detection limit BMP best management practice BMPDB International Stormwater Best Management Practices Database BOD biochemcal oxygen demand CA California CaCl2 calcium chloride Caltrans California Department of Transportation Cd cadmium CFU colony-forming units (bacteria) CIA Cooperative Implementation Agreement Cl- chloride COD chemical oxygen demand Colorado DOT Colorado Department of Transportation CRWR Center for Research in Water Resources (Austin, Texas) CU Compliance Unit (California) Cu copper CWA Clean Water Act DENR Department of Environment and Natural Resources DEQ Department of Environmental Quality DO dissolved oxygen DOC dissolved organic carbon DOT Department of Transportation DP dissolved phosphorus E. coli Escherichia coli EA/EIS environmental assessment/environmental impact statement EMC event mean concentration EOF edge of field EPA U.S. Environmental Protection Agency FDOT Florida Department of Transportation Abbreviations and Acronyms
Abbreviations and Acronyms 123 Fe iron FHWA Federal Highway Administration ft feet/foot GIS Geographic Information System HEP FHWA Office of Planning, Environment, and Realty Hg mercury HRDB Highway Runoff Database HUC hydrologic unit code IDDE illicit discharge detection and elimination IDS intrusion detection systems IMP impervious fraction Ln natural log LID low-impact development MAC marginal abatement cost MANAGE measured annual nutrient loads from agricultural environments MassDOT Massachusetts Department of Transportation MCTT multichambered treatment train MDN Mercury Deposition Network MDSHA Maryland State Highway Administration MS4 municipal separate storm sewer system NaCl sodium chloride NADP National Atmospheric Deposition Program NASGLP North American Soil Geochemical Landscapes Project NC North Carolina NCDC National Climatic Data Center NCDENR North Carolina Department of Environment and Natural Resources NCDMS North Carolina Division of Mitigation Services NCHRP National Cooperative Highway Research Program NDEP Nevada Division of Environmental Protection NDOT Nevada Department of Transportation Nevada DOT Nevada Department of Transportation NH4 + ammonium NO2 nitrite NO3 nitrate NPDES National Pollutant Discharge Elimination System NSQD National Stormwater Quality Database NTN National Trends Network PAH polyaromatic hydrocarbon Pb lead PCB polychlorinated biphenyl PFC permeable friction course pH potential of hydrogen PNW Pacific Northwest POC pollutant of concern PRISM ParameterâElevation Relationships on Independent Slopes Model PWQ permanent water quality Rv volumetric runoff coefficient RWQCB Regional Water Quality Control Board (California) SD standard deviation Se selenium SELDM Stochastic Empirical Loading and Dilution Model
124 Approaches for Determining and Complying with TMDL Requirements Related to Roadway Stormwater Runoff SJRWMD St. Johns River Water Management District SO4 2- sulfate SUSTAIN System for Urban Stormwater Treatment and Analysis Integration SWMM Storm Water Management Model (EPA) SWRCB State Water Resources Control Board (California) TDS total dissolved solids TKN total Kjeldahl nitrogen TLR total load reduction TMDL total maximum daily load TN total nitrogen TOC total organic carbon TP total phosphorus TRB Transportation Research Board TSS total suspended solids UOP unit operation and process USDA-ARS U.S. Department of Agriculture Agricultural Research Service USGS U.S. Geological Survey UTP unit treatment process Virginia DOT Virginia Department of Transportation WATERS Watershed Assessment, Tracking and Environmental Results System WBSMT watershed-based stormwater mitigation toolbox WDR waste discharge requirement WLA waste load allocation WQIP Water Quality Improvement Program WRF Water Research Foundation WSDE Washington State Department of Ecology Washington State DOT Washington State Department of Transportation Zn zinc
