Planning & PermitsEgret on the Delta

Construction Stormwater Program

Projects that disturb one or more acres of soil or those projects that disturb less than one acre but are part of a larger common development plan that disturbs one or more acres are required to obtain coverage under the General Permit for Discharges of Storm Water Associated with Construction Activity, Construction General Permit Order 2009-0009-DWQ. (See External Links below.)


Construction activity subject to this permit includes clearing, grading, and disturbances to the ground, such as stockpiling or excavation. Excluded activity includes regular maintenance activities performed to restore the original line, grade, or capacity of the facility.


The Construction General Permit requires the development and implementation of a Stormwater Pollution Prevention Plan (SWPPP). The SWPPP should contain:

  • Site map(s) that shows construction site perimeter
  • Existing and proposed buildings, lots, roadways, stormwater collection and discharge points
  • General topography before and after construction
  • Drainage patterns across the project


The SWPPP must list:

  • Best Management Practices (BMPs) used to protect stormwater runoff and placement of BMPs.
  • Visual monitoring program
  • Chemical monitoring program for "nonvisible" pollutants to be implemented if BMP failure
  • Sediment monitoring plan if site discharges directly to a water body listed on 303(d) list for sediment


Section A of Construction General Permit describes what must be contained in a SWPPP. 


This Stormwater Volume Reduction Spreadsheet can help calculate the amount of stormwater a property will generate. This spreadsheet can also be used as a tool to reduce stormwater runoff.


If a single project traverses more than one Regional Water Quality Control Board (RWQCB) jurisdiction, a complete Notice of Intent package (which includes Notice of Intent, site map, and fee) and Notice of Termination (upon completion of each section) must be filed for each RWQCB.


Industrial Stormwater Program

The Industrial Storm Water General Permit Order 97-03-DWQ (General Industrial Permit) is a NPDES permit that regulates discharges associated with 10 broad categories of industrial activities.


The General Industrial Permit requires the implementation of management measures to achieve the following:

  • Performance standard of best available technology economically achievable (BAT)
  • Best conventional pollutant control technology (BCT)


The General Industrial Permit also requires the development of a SWPPP and a monitoring plan. In the SWPPP, identify sources of pollutants and describe the means to manage the sources to reduce stormwater pollution.


The General Industrial Permit requires an annual report be submitted each July 1. Facility operators may be able to participate in group monitoring program.


External Links

State of California Stormwater Program - Construction General Permit Order 2009-0009-DWQ

State of California Stormwater Program - Industrial Stormwater General Permit Order 97-03-DWQ

State of California Stormwater Group Monitoring Program


This City of Stockton web page last reviewed on --- 9/6/2017