Choosing The Right Stp

Choosing The Right Stp

• 1.
  Selecting the MostEffective Stormwater Treatment Practice Presented by the Center for Watershed Protection
• 2.
  Seven-Step Process toSTP Screening Land Use Physical Feasibility Climate/ Regional Factors Watershed Factors Stormwater Management Capability Pollutant Removal Community and Environmental Factors
• 3.
  Customizing Matrices toLocal Needs Matrices are not necessarily exhaustive. Specific additional criteria may be incorporated or removed depending on local goals. Most of the material in the screening matrices provides technical guidance, and is not necessarily a regulatory mandate.
• 4.
  Step 1. LandUse Rural —STPs for low density areas Residential —STPs for med. to high density residential Roads & Highways —STPs for major roads Commercial— STPs suitable for new commercial areas Hotspot Land Uses— STPs for high risk areas Ultra-Urban Sites— STPs for space-limited areas Step 1 Matrix
• 5.
  Step 2. PhysicalFeasibility Soils Water Table Drainage Area Slope Head Step 2 Matrix
• 6.
  Step 3. Climate and Regional Factors Arid/Semi-arid Low Relief Cold Climates Karst Topography High Rainfall Step 3 Matrix
• 7.
  Step 4. WatershedFactors Considerations for the following resource categories: Sensitive Streams Impacted Streams Non-Supporting Streams Restorable Streams Aquifers Urban Lakes Reservoirs Estuaries/ Shellfish Beds Step 4.2 Matrix Step 4.1 Matrix
• 8.
  Step 5. Stormwater Management Capability Water Quality Recharge Channel Protection Quantity Control Step 5 Matrix
• 9.
  Step 6. PollutantRemoval Pollutant data assessed include: Total Suspended Solids Total Phosphorous Total Nitrogen Metals Bacteria Step 6 Matrix
• 10.
  Step 7. Communityand Environmental Factors Maintenance Community Acceptance Affordability Safety Habitat Step 7 Matrix