1. 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 CIVE Spring 2006

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

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

4. Sources of Pollutants and Stressors
Natural
Sediment
Metals
Bacteria
Temperature
University of Houston -- Integrated Watershed Mangement -- Session CIVE Spring 2006

5. 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 CIVE Spring 2006

6. 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 CIVE Spring 2006

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

8. 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 CIVE Spring 2006

9. Glossary of Terms (cont.)
Lotic and lentic waters
Nephelometric turbidity unit (NTU)
Maximum contaminant level (MCL)
Particle size
Clay millimeters (mm)
Silt mm Human hair is mm
Sand mm
Gravel mm
University of Houston -- Integrated Watershed Mangement -- Session CIVE Spring 2006

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

11. 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 CIVE Spring 2006

12. 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 CIVE Spring 2006

13. 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 CIVE Spring 2006

14. 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 CIVE Spring 2006

15. 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 CIVE Spring 2006

16. 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 CIVE Spring 2006

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

18. 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 CIVE Spring 2006

19. 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 CIVE Spring 2006

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

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