What is the difference between a Stormwater Pollution Prevention Plan (SWPPP) and a Stormwater Control Plan (SWCP)?

A Stormwater Pollution Prevention Plan (SWPPP) is a document that describes how a project will prevent pollution during the construction process.  This document details how erosion will be prevented and how sediment will be controlled, as well as how other construction-related pollutants, such as concrete dust and fluids from construction equipment, will be prevented.  SWPPPs, which are required under the California Construction General Permit, must be submitted for projects disturbing at least 1 acre of soil, and for certain projects involving less earthwork but pose special threats to water quality.  Smaller projects also are required to implement adequate erosion and sediment controls.

A Stormwater Control Plan (SWCP) is a document that details permanent storm water management facilities (such as bioretention areas) that will be incorporated into development projects to treat storm water runoff and control runoff rates and volumes after the construction process is completed.  SWCPs are required for projects that must implement permanent storm water management facilities to comply with C.3 of the NPDES Permit.

Show All Answers

1. How do I calculate the Flood Control flow data point? Do I need to know the post development design flows for my project?
2. How do I determine the 25-year 24-hour storm depth
3. What are Pollutants of Concern (POCs)?
4. What are Stormwater Best Management Practices (BMPs)?
5. What is a Watershed?
6. What is an illicit discharge and who do I call to report it?
7. What is an NOI and what permits does it cover?
8. What is C.3?
9. What is NPDES and who oversees it?
10. What is the design storm for my project?
11. What is the difference between a Stormwater Pollution Prevention Plan (SWPPP) and a Stormwater Control Plan (SWCP)?
12. What is the difference between point source and non-point source?
13. What is the difference between the County Watershed Program and the Contra Costa Clean Water Program?
14. What is the difference between the storm drain system and the sanitary sewer?
15. What is the drainage easement across my property? Can I build on it? What can I do on it?
16. Who do I contact if I have flooding on my street?