HomeMy Public PortalAbout2019-04-10 Barracuda Approval
April 10, 2019
Baysaver Technologies, LLC
Attention: Brian Rustia, PE
RE: BaySaver Barracuda Hydrodynamic Separator
Dear Mr. Rustia,
The Metropolitan St. Louis Sewer District (MSD) has reviewed the 11/25/2018 application for the
BaySaver Barracuda Hydrodynamic Separator and is pleased to provide Highway Use Level (HUL), and
Redevelopment Use Level (RUL) for use as a stand-alone water quality BMP subject to the following
provisions.
• The Barracuda is only approved for use on public highway and roadway projects and for
redevelopment sites less than 5 acres. This approval is based upon compliance with
requirements listed in MSD’s Proprietary Water Quality Products and the MSD’s Stormwater
Management Program (Rev. Jan. 2009).
• The Barracuda must be sized to capture all floatable trash and free oil, and remove 80% of total
suspended solids for the OK-110 particle size distribution at the site water quality flow-rate
(WQf). Procedures for calculating WQf are provided in Appendix D.10 of the Maryland
Stormwater Design Manual (2000). Table 1 provides a list of approved models and their
respective instantaneous peak treatment WQf. The 2400 micron screen will be used.
Model Manhole
Diameter [ft]
Max Treatment
Flow [cfs]
Barracuda S3 3 0.61
Barracuda S4 4 1.08
Barracuda S5 5 1.69
Barracuda S6 6 2.43
Barracuda S8 8 4.32
Barracuda S10 10 6.75
Table 1. Maximum Water Quality Treatment Flow Rate (WQf) by Model
• Only concrete manholes are allowed at this time.
• Devices should be configured as off-line units, downstream from a diversion manhole. In most
cases the BMP will be installed without the need to store the water quality volume (WQv)
upstream of the unit.
• All devices shall provide a minimum sediment storage capacity of 10 ft3.
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