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Proprietary Stormwater Quality Treatment Devices
Accepted Devices
The following proprietary stormwater quality treatment devices are currently accepted for use in Sacramento County:
• Jensen Precast StormVault®
• CONTECH Stormwater Solutions StormFilter® (1 gpm/ft², ZPG media)
• CONTECH Stormwater Solutions StormFilter® (2 gpm/ft², ZPG media) 
• Filterra® Bioretention System (percolation rate = 50 in/hr) 

Submittal Requirements
Site designers proposing to use proprietary stormwater quality treatment devices shall include the following items in the submittal and on the improvement plans (drawings to scale):
• Sizing calculations
• Plan view of device & appurtenances on the civil site plans
• Section view of device & appurtenances in reference to other utilities
• Detail drawings of device & appurtenances
• Specifications and installation notes.
Currently, the City & County of Sacramento do not allow 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.

Maintenance Agreements are required to ensure proper maintenance of the selected stormwater quality treatment device. 

Pilot Project Study Montoring Requirements
In select cases, the local permitting agency may allow the use of alternative proprietary treatment measures as a "pilot study." In such cases, the property owner and/or manufacturer will be required to fund and complete a monitoring study to verify the device's performance. Since approval is not guaranteed, site designers proposing to use an alternative technique should coordinate with the permitting agency early in the site design process.

Pilot Study Monitoring Requirements

An addendum to the pilot study procedure has been added for proprietary devices that have TAPE (Technology Assessment Protocol – Ecology) or TARP (Technology Acceptance Reciprocity Partnership) data. If this applies to you please see the amendment. It provides information regarding what you would need to provide to obtain approval in Sacramento Region. 
History
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 report “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.

In addition to devices accepted using the Sacramento area protocol, the Sacramento Stormwater Quality Partnership (Partnership) will consider accepting 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.
© 2012 SACRAMENTO STORMWATER QUALITY PARTNERSHIP
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