Small Project Stormwater Pollution Prevention Plan (SWPPP ... - co snohomish wa 2026

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  1. Click ‘Get Form’ to open it in the editor.
  2. Begin by filling out the BASIC PROJECT INFORMATION section. Include details such as Project File Number, Township, and Site Address.
  3. In the NARRATIVE section, provide a brief description of your project and check 'yes' or 'no' for each small project criteria.
  4. Proceed to each ELEMENT section. For each element that applies, select the appropriate best management practices (BMPs) and describe your planned actions.
  5. Complete the final sections regarding BMP maintenance and project management strategies to ensure compliance throughout construction.
  6. Attach a site plan sketch as required, ensuring all necessary details are included before submission.

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Reduce rooftop runoff by directing your downspouts to vegetated areas, and not to the storm drain on your street. For your driveway and patios, consider putting in permeable paving or patterns of cement and brick that allow water to filter through it. Support your local storm or surface water program.
There are many important factors that must be included in the development of an effective SWPPP, including site-specific potential pollutant sources, drainage scenarios, structural control devices and the identification of accountable pollution prevention team members.
Polluted stormwater runoff is the number one water pollutant. As stormwater moves across developed areas, it picks up garbage, debris, sediment, chemicals, automotive fluids, fertilizers, leaves and other pollutants from parking lots, yards, streets, roofs and other hard surfaces.
One way is to increase water infiltration. This can be accomplished by replacing pavement and concrete with more permeable pavement materials such as pavers (stones) with pore holes in them. Also planting trees and building buildings up (taller) and not out taking up more area on a streetblock will reduce urban runoff.
It scours streambeds and stream banks, causing additional erosion. Excess nutrients in runoff, especially nitrogen and phosphorus, cause waterbody-impairing algal blooms. As algae die and decompose, oxygen levels decrease, harming or killing fish, plants and other aquatic organisms.

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One of the most common mistakes operators make is using a generic SWPPP template without tailoring it to the specific site conditions and state requirements. Every construction site has unique topography, soil composition, and water drainage patterns that must be accounted for in the plan.
How long is an SWPPP valid? A SWPPP is valid as long as the project is active and covered under the NPDES permit. It must be updated to reflect any changes in site conditions or operations as they occur. NPDES permits are typically issued and billed in annual cycles.

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