Why are we here today?• To discuss the challenges we face in meeting

NPDES Phase II minimum requirements for stormwater control.

• The NPDES program requires permits for the discharge of "pollutants'' from any "point source'' into "waters of the United States.''

• Point sources include stormwater.• Permitted discharge includes management and

regulatory programs, appropriate “treatment” methods, planning, financing, long term maintenance, life cycle analysis, minimizing off-site (downstream) impacts, etc.

Post-construction stormwater management

(i) You must develop, implement, and enforce a program to address stormwater runoff from new development and redevelopment projects that disturb greater than or equal to one acre, including projects less than one acre that are part of a larger common plan of development or sale, that discharge into your small MS4. Your program must ensure that controls are in place that would prevent or minimize water quality impacts.

(ii) You must:• (A) Develop and implement strategies which include a combination of

structural and/or non-structural best management practices (BMPs) appropriate for your community;

• (B) Use an ordinance or other regulatory mechanism to address post-construction runoff from new development and redevelopment projects to the extent allowable under State, Tribal, or local law; and

• (C) Ensure adequate long-term operation and maintenance of BMPs.

EPA Model Ordinance Language• The purpose of this ordinance is to establish minimum stormwater

management requirements and controls to protect and safeguard… through the following objectives: – minimize increases in stormwater runoff from any development in

order to reduce flooding, siltation, increases in stream temperature, and streambank erosion and maintain the integrity of stream channels;

– minimize increases in nonpoint source pollution caused by stormwater runoff from development which would otherwise degrade local water quality

– minimize the total annual volume of surface water runoff which flows from any specific site during and following development to not exceed the pre-development hydrologic regime to the maximum extent practicable.

– reduce stormwater runoff rates and volumes, soil erosion and nonpoint source pollution, wherever possible, through stormwater management controls and ensure these management controls are properly maintained and pose no threat to public safety.

• Innovative BMPs for Site Plans– Alternatived Pavers and Turnarounds– Conservation Easements– Development Districts– Eliminating Curbs and Gutters– Green Parking– Green Roofs– Intrastructure Planning– Low Impact Development (LID)– Narrower Residential Streets– Open Space Design– Protection of Natural Features– Redevelopment– Riparian/Forested Buffers– Street Design and Patterns– Urban Forest

• Infiltration– Grassed Swales– Infiltration Basin– Infiltration Trench– Porous Pavement

• Filtration– Bioretention and Rain Gardens– Catch Basin Inserts– Sand and Organic Filters– Vegetated Filter Strip

• Retention/Detention– Dry Detention Ponds– In-line Storage– On-lot Treatment– Stormwater Wetland– Wet Ponds

• Other– Alum Injection– Manufactured Products for Stormwater Inlets