Stormwater Pollution Prevention Plans
What is a SWPPP?
A Stormwater Pollution Prevention Plan (SWPPP) is a site-specific, written document that:
- Identifies potential sources of stormwater pollution at the construction site
- Describes practices to reduce pollutants and the volume of stormwater discharges from the construction site
- Identifies procedures the operator will implement to comply with the terms and conditions of a construction general permit
- Describes the site and each major phase of the planned activity
- Outlines the roles and responsibilities of contractors and subcontractors
- Documents changes and modifications to the construction plans and associated stormwater pollution prevention activities
Common SWPPP Objectives
The SWPPP outlines the steps you will take to comply with the terms and conditions of your construction general permit. Keeping the following objectives in mind as you develop your SWPPP will help guide you in addressing your permit requirements and in protecting water quality.
- Stabilize the site as soon as possible.
- Protect slopes and channels.
- Reduce impervious surfaces and promote infiltration.
- Control the perimeter of your site.
- Protect receiving waters adjacent to your site.
- Follow pollution prevention measures.
- Minimize the area and duration of exposed soils.
Like your construction site, your SWPPP is dynamic. It is a document that must be amended to reflect changes occurring at the site. As plans and specifications change, those changes should be reflected in your SWPPP. If you find that a BMP is not working and you decide to replace it with another BMP, you must reflect that change in your SWPPP. Document in your SWPPP transitions from one phase of construction to the next, and make sure you implement new BMPs required for the next phase.