Integrated Watershed Management Session 2 Sources of the Water Characteristics of the Environment Sources of Pollutants and Stressors Glossary of Terms NPDES Permitting Process University of Houston -- Integrated Watershed Mangement -- Session 2 CIVE7397 -- Spring 2006

Sources of the Water Rainfall Springs Discharges Diversions University of Houston -- Integrated Watershed Mangement -- Session 2 CIVE7397 -- Spring 2006

Characteristics of the Environment Land slope and topography Soil types Vegetation types Climate Degree of development University of Houston -- Integrated Watershed Mangement -- Session 2 CIVE7397 -- Spring 2006

Sources of Pollutants and Stressors Natural Sediment Metals Bacteria Temperature University of Houston -- Integrated Watershed Mangement -- Session 2 CIVE7397 -- Spring 2006

Sources of Pollutants and Stressors (cont.) Man- made Waste discharges (Point source) Heat discharges Landfill leachate Storm water concentration Erosion Litter University of Houston -- Integrated Watershed Mangement -- Session 2 CIVE7397 -- Spring 2006

Glossary of Terms Watershed Total Maximum Daily Load (TMDL) One, Two and Three Dimensional Models Conservative and Non-Conservative Pollutants Geomorphology Hydrology Hydraulics University of Houston -- Integrated Watershed Mangement -- Session 2 CIVE7397 -- Spring 2006

Glossary of Terms (cont.) Time of concentration Beneficial use designation Best management practices Biochemical oxygen demand Clean Water Act (1972) PL 92-500 Floodplain Floodway University of Houston -- Integrated Watershed Mangement -- Session 2 CIVE7397 -- Spring 2006

Glossary of Terms (cont.) Non-point source pollution Recreational use categories Riparian area Base flow Erosion Freshwater Headwater University of Houston -- Integrated Watershed Mangement -- Session 2 CIVE7397 -- Spring 2006

Glossary of Terms (cont.) Lotic and lentic waters Nephelometric turbidity unit (NTU) Maximum contaminant level (MCL) Particle size Clay 0.00024 -- 0.004 millimeters (mm) Silt 0.004 -- 0.062 mm Human hair is .02 -- .2 mm Sand 0.062 -- 2.0 mm Gravel 2.0 -- 64.0 mm University of Houston -- Integrated Watershed Mangement -- Session 2 CIVE7397 -- Spring 2006

Glossary of Terms (cont.) Xeriscaping Low impact development Acre-foot -- 43,560 cubic feet Evaporation Transpiration Evapotranspiration University of Houston -- Integrated Watershed Mangement -- Session 2 CIVE7397 -- Spring 2006

NPDES Permitting Process Program Responsibility State of Texas – Base Program General Permitting Federal Facilities Pretreatment Bio-Solids EPA Region 6 – Oil & Natural Gas Facilities University of Houston -- Integrated Watershed Mangement -- Session 2 CIVE7397 -- Spring 2006

NPDES Permitting Process (cont.) Texas Commission on Environmental Quality September 14, 1998 Industrial facilities Exception – Railroad commission of Texas RRCT) SICs 1311,1321,1382,1389,4922,4925 Publicly and Privately Owned Treatment Works Concentrated Animal Feeding operations (CAFO) Storm water discharges associated with industrial activity and Municipal Separate Storm Sewer Systems (MS4) Pretreatment and Sewage Sludge Programs University of Houston -- Integrated Watershed Mangement -- Session 2 CIVE7397 -- Spring 2006

NPDES Permitting Process (cont.) Environmental Protection Agency Region 6 Permitting & Enforcement for oil and gas process, storage and transportation facilities Permitting for Indian Country University of Houston -- Integrated Watershed Mangement -- Session 2 CIVE7397 -- Spring 2006

NPDES Permitting Process (cont.) Permit Quality State Guidance Document Procedures to Implement the Texas Surface Water Quality Standards Water Quality Based Effluent Limitations (WQBELs) TEXTOX program to convert in-stream water quality standards to permit limits Whole Effluent Toxicity Program (WET) No significant lethal effects of the critical low flow effluent dilution established in the permit Toxicity reduction Evaluation (TRE) Lethal and non-lethal effects University of Houston -- Integrated Watershed Mangement -- Session 2 CIVE7397 -- Spring 2006

NPDES Permitting Process (cont.) Pretreatment 1349 Significant Industrial Users (SIUs) 681 are Categorical Industrial Users (CIUs) Concentrated Animal Feeding Operations (CAFOs) 1100 CAFOs Nutrient Management Plans (NMPs) Nutrient Utilization Plan (NUP) 200 ppm Phosphorous in soil requires the NUP development University of Houston -- Integrated Watershed Mangement -- Session 2 CIVE7397 -- Spring 2006

NPDES Permitting Process (cont.) Storm Water Pretreatment 22 Phase I MS4 permits 19 currently expired Phase I and II General Construction Permits Phase II small MS4 Permits Combined Sewer Overflows/Sanitary Sewer Overflows No Combined Sewer Overflows in Texas Airport Dry/Wet Storm Water Control Strategies Sanitary Sewer Overflows >100,000 gallons University of Houston -- Integrated Watershed Mangement -- Session 2 CIVE7397 -- Spring 2006

NPDES Permitting Process (cont.) Biosolids Sewage Sludge Disposal Beneficial Use and Land Application University of Houston -- Integrated Watershed Mangement -- Session 2 CIVE7397 -- Spring 2006

NPDES Permitting Process (cont.) Monitoring Surface Water Quality Monitoring (SWQM) Clean Rivers Program (CRP) 1429 Sites Monitored 431 by TCEQ 920 by CRP 78 by US Geological Survey University of Houston -- Integrated Watershed Mangement -- Session 2 CIVE7397 -- Spring 2006

NPDES Permitting Process (cont.) Water Quality Standards E. coli and Enterococci (Approved) Nutrients (Draft) Total Maximum Daily Loads (TMDLs) 259 waterbodies were impaired 23 TMDLs Completed University of Houston -- Integrated Watershed Mangement -- Session 2 CIVE7397 -- Spring 2006

Texts & Assignments “Watershed Based National Pollutant Discharge Elimination System (NPDES) Permitting Implementation Guidance’” US Environmental Protection Agency, Dec. 2003. Continue Appendix A University of Houston -- Integrated Watershed Mangement -- Session 2 CIVE7397 -- Spring 2006

Next Session Stream Classification Process Stream Use Designations 303 (d) list of Impaired Streams University of Houston -- Integrated Watershed Mangement -- Session 2 CIVE7397 -- Spring 2006