Summary of Stormwater Threshold Requirements - Related to New Developments

Threshold

Requirements

Timing

1 acre or more of impervious area created or replaced

C.3. Plan that outlines how the project is designed to capture and treat all of the stormwater run-off on a site

Planning Submittal (until August 15, 2006)

10,000 square feet or more of impervious area created or replaced

C.3. Plan that outlines how the project is designed to capture and treat all of the stormwater run-off on a site

Planning Submittal (after August 15, 2006)

1 acre or more of land disturbance.

If project has coverage under the State General Construction Permit, the owner must submit a Notice of Intent(NOI) and fee to the State of California and prepare a Stormwater Pollution Prevention Plan (SWPPP).  Owner/Developer must include a copy of the NOI and SWPPP in the construction documents submitted to the Town for review and approval prior to issuing any permits for the site.  

Building or Grading Permits - all year long

All sites requiring a grading permit (In general, that’s when there is movement of 100 cy. of dirt or more or a change in surface elevation of 3 feet or more).

Preparation of an Erosion Control Plan (ECP) in addition to the SWPPP.   The ECP and SWPPP must be continuously updated as field conditions warrant.

Grading Permit all year long. ECP is required for work during Oct. 15- April 15

If a proposed project affects the waters of the State (any wet or dry water course within the Top of Bank and all wetlands), including outfalls.

Prior to the Town’s approval to start construction, owner must obtain a Water Quality Certification issued by the Regional Water Quality Control Board (RWQCB).  Fee paid to the State Board.

Building or Grading permits -all year long

If a proposed project affects the waters of the U.S.  (within an area bounded by the ordinary high water mark).

The owner must receive approval by the Army Corps of Engineers and get a Water Quality Certification from the RWQCB before the Town can issue any permits to start construction.

Building or Grading permits - all year long

If a project affects a stream, river or creek within the area bounded by the Top of Bank or the outermost edges of riparian vegetation, Fish and Game must be consulted.

A Department of Fish and Wildlife Agreement is required prior to the Town issuing a permit to work in or near the watercourse.

Building or Grading permits - all year long

Federally Endangered Species

U.S. Fish and Wildlife

Building or grading permits -  all year long.