What Proprietary Stormwater Quality Treatment Devices Are Currently Allowed?The following proprietary filters and separators are currently accepted for use in Sacramento County:
Since the late 1990's, the Sacramento Stormwater Quality Partnership has been conducting a study to investigate the performance of proprietary stormwater quality devices. In November 1999, they published the Investigation of Structural Control Measures for New Development. The report documents the protocol that must be followed in order for a particular device to be accepted for use in the Sacramento area. Manufacturers have been invited on several occasions since then to submit data which could be reviewed for conformance with the protocol, but to date, only one proprietary stormwater quality treatment device has successfully met the protocol: Stormvault by CONTECH Stormwater Solutions® (formerly known as the Jensen Precast Stormvault™ or the CON/SPAN Stormvault). Site designers proposing to use this device need to submit sizing calculations to the local permitting agency (software is supplied by the manufacturer for this purpose). Note that no other Jensen models (e.g., JPHV interceptor) are approved at this time. In addition to devices accepted using the Sacramento area protocol, the Sacramento Stormwater Quality Partnership (Partnership) will accept technologies with the Washington State Department of Ecology's General Use Level Designation for Basic (TSS) Treatment on a case by case basis. Refer to Ecology's Evaluation of Emerging Stormwater Treatment Technologies for more information on their technology evaluation program and protocols. As of January 25, 2006, the Partnership has accepted the StormFilter by CONTECH Stormwater Solutions® (formerly Stormwater360 or Stormwater Management). Only the model containing ZPG (zeolite/perlite/granular activated carbon) mix approved for basic treatment at 7.5 GPM maximum flow rate per cartridge is approved. Site designers proposing to use the device need to submit sizing calculations to the local permitting agency. Note that other media or higher flow rates will not be accepted. Site designers proposing to use either the Stormvault or the StormFilter shall include the following items (to scale) on the improvement plans:
Currently, the City & County of Sacramento do not allow these types of
proprietary stormwater quality treatment devices to be installed in the
public right-of-way or in areas where the local agency would be required to
conduct maintenance. Other local agencies may or may not allow this; check
with your permitting agency for verification. |