What is C.3?

C.3 refers to Provision C.3 of the County’s NPDES Permit, which was added to the Permit in 2003.  This provision requires stormwater runoff from projects creating and/or redeveloping at least 10,000 square feet of impervious surface to treat stormwater runoff with permanent stormwater management facilities, and requires projects creating and/or redeveloping to design such facilities to control runoff rates and volumes (in addition to treatment).  Projects that are not required to comply with C.3 still implement permanent stormwater controls to the maximum extent practicable.

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1. What are Area of Benefit (AOB) funds used for?
2. What are Best Management Practices (BMPs)?
3. What are Pollutants of Concern (POCs)?
4. What are the Public Works Counter hours of service, phone numbers, and location?
5. What can property owners do to help the County's maintenance efforts of private trees and other vegetation?
6. What can property owners do to prevent fallen leaves from creating blockages in the drainage system?
7. What do I do if my neighbor informed me that I am encroaching on his property?
8. What information should I provide when reporting a streetlight outage?
9. What is a cape seal?
10. What is a micro-surface seal?
11. What is a slurry seal?
12. What is a traffic Area of Benefit (AOB)?
13. What is a Watershed?
14. What is an illicit discharge and who do I call to report it?
15. What is an NOI and what permits does it cover?
16. What is C.3?
17. What is IPM and what are some ways I can try it?
18. What is NPDES and who oversees it?
19. What is the Adopt-A-Road Program?
20. What is the construction work occurring on a County Road or Flood Control Facility?
21. What is the CRIPP?
22. What is the design storm for my project?
23. What is the difference between a Stormwater Pollution Prevention Plan (SWPPP) and a Stormwater Control Plan (SWCP)?
24. What is the difference between point source and non-point source?
25. What is the difference between the County Watershed Program and the Contra Costa Clean Water Program?
26. What is the difference between the storm drain system and the sanitary sewer?
27. What is the Public Works Budget?
28. What projects are upcoming or currently advertised?
29. What should I do if I see someone dumping garbage on private or public property?
30. What is a Chip Seal?
31. What is the basis of the Area of Benefit (AOB) Program?
32. What is the County's responsibility in maintaining private drainage systems?
33. What is the drainage easement across my property? Can I build on it? What can I do on it?