Drains or Catch Basins

• Remove debris from grates
• Have catch basins cleaned when:
  • the outlet pipe is covered in water even when it is not raining
  • the sediment depth i n the catch basin sump is 6"  (six inches) or more

 Oil / Water Separators

• Clean and replace absorbent pads after each spill or by October 1 of each year.  Additional cleaning and/or replacement may be required throughout the year.
• Have oil / water separators cleaned when:
  • oil accumulation exceeds 1/2" (one half inch) in first chamber
  • when there is any visible oil in the second chamber
  • when the sediment level reaches 6"  (six inches)

 Detention Facilities and Retention Facilities

• Clean when the sediment exceeds 109% of the storage depth

 Bioswale

• Clean when the vegetation or debris interferes with the flow of water
• Keep grass 3-6" high   (three to six inches)

 If you have questions, or need assistance with a stormwater system inspection, please contact Kitsap 1 at
 360-337-5777 or Kitsap1@co.kitsap.wa.us

Kitsap County Public Works                                                                                      Updated: 10/19/2009
Surface & Stormwater Management Program
(360) 337-5777 or (800) 825-4940
Kitsap1@co.kitsap.wa.us