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From the Beginning

From the Beginning. Design Standards and Other Post-Construction Program Elements. Post-Construction BMPs. Long term BMPs that help protect runoff throughout the life of the completed project. Impervious Area. More runoff, More Pollutants. Water Quality Goals Reduce impervious area

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From the Beginning

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  1. From the Beginning Design Standards and Other Post-Construction Program Elements

  2. Post-Construction BMPs Long term BMPs that help protect runoff throughout the life of the completed project

  3. Impervious Area • More runoff, More Pollutants

  4. Water Quality Goals Reduce impervious area Limit pollutant exposure Diminish pollutant transport Program Goals Process to ensure that “Water Quality Goals” are met Post Construction Goals

  5. Program • Ordinance requiring developers to incorporate post construction BMPs • Strategy of BMPs • Enforcement of ordinance • Long-term operation and maintenance of BMPs

  6. Ordinance • Model Ordinance • www.stormwatercenter.net • Model Urban Runoff Program • Reference to separate document

  7. BMP Strategy • Site and watershed conditions • constraints • topography • areas to utilize • Pollutants of concern • 303(d) list • pollutants expected to be present • Options • Sizing

  8. BMPs Treatment Source Control Site Design

  9. Site Design • Minimize building footprint • Cluster development (leaving more useful open space) • Minimize directly connected impervious areas (DCIA) • direct roof downspouts to landscape areas • Protect slopes and channels • Aquatic buffers

  10. Source Control • Outdoor material storage areas • Trash enclosures • Equipment wash areas

  11. Treatment • Vegetated swales • Detention basins • Constructed wetlands

  12. Attachment 4 - Design Standards Conserve Natural Areas Limit Directly Connected Impervious Area Parking Lots Restaurants Retail Gasoline Outlets Vehicle Equipment Wash Areas Storage Volume Treatment Flow Requirements

  13. Enforcement • Site Plan Review • Checklist • Site Inspection • As part of final approval

  14. Maintenance • Legal agreements • Conditional use permits • Homeowner’s association • Conditions, covenants, and restrictions • Databases • Inspections checklists

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