HomeMy Public PortalAbout366316etropollt n
St. Louis Sewer
District
2350 Market Street
St. Louis, MO 63103-2555
(314) 768-6200
August 24, 2010
Mr. Kevin Rowe
Brentwood Industries, Inc.
610 Morgantown Road
Reading, PA 19611
RE: StormTank TM Stonnwater Storage System
Provisional Use Level (PUL) Approval within District
Dear Sir:
The Metropolitan St. Louis Sewer District (MSD) has reviewed your application regarding the
StonnTank TM Stonnwater Storage System for use as a stormwater storage system; that is with
the intent to provide detention and attenuation of peak flows. MSD is pleased to provide
Provisional Use Level (PUL) approval for use of the Ston-nTank TM Stormwater Storage System
use as a stormwater storage system.
o The StonnTank TM Stormwater Storage System is only approved for use on
redevelopment projects of any size. A total of only one (1) installation shall be allowed
under this approval.
• The StonnTank TM Stormwater Storage System shall be used only to provide storage for
the Peak Design Storm (Qp) and Channel Protection (CPv) design stone volumes.
• The StonnTank TM Stonnwater Storage System is not intended to be a device that is used
as a stand alone BMP.
• The StotinTank TM Stonnwater Storage System may be used beneath pervious and
impervious paving systems, or as part of an infiltration system.
• Consistent with MSD Rules and Regulations, the use of buried storage shall be avoided
on residential type projects.
• Adequate pretreatment shall be provided in all site designs; this will include a stand-
alone BMP capable of treating the full Water Quality (WQv) volume.
• Devices should be kept off-line until the construction site is stabilized and otherwise
protected from sediment build-up during and after construction.
• Adequate access and inspection access shall be provided.
• All proprietary lids and covers should be captive components.
• Project specific design calculations and maintenance plans furnished by Brentwood
Industries, Inc., must be included within the project's "Stormwater Management
Facilities Report" prepared by the consulting engineer. All applicable elements of the
design shall comply with the "StormTank TM" Submittal to Metropolitan St. Louis Sewer
District Version 1.0," July 2010.
® The initial installation of the StorlliTank TM Stoinrwater Storage System in the MSD
shall include the following:
1) A manufacturer's or vendor's representative must be onsite during the installation
to ensure the product's installation requirements are met.
2) Shop drawings indicating elevations of flowlines, pipe inverts, etc. will be
required prior to installation.
3) The manufacturer or vendor must arrange for an as -built survey of the proprietary
storage device to be performed by a Missouri -registered Professional Land
Surveyor once the device has been installed, and prior to any testing or
monitoring.
4) The manufacturer or vendor must perform quarterly inspections of the
proprietary device during its' first year of operation, which will include visual
inspections. MSD requests to be invited to these inspections to further enhance
familiarity and understanding of the device.
5) Foinial reports shall be submitted to MSD, including as-builts and at each
quarterly inspection. The reports shall include summaries, quantitative analysis
mentioned in item 4, photographs of the structure, inlet, internal conditions of the
structure, and outfall conditions, etc. The reports shall also evaluate the
performance of the owner's adherence to the approved maintenance program, and
offer suggestions for any areas of improvement.
StoimTank TM Stonnwater Storage System is not approved for general use at this time.
MSD reserves the ability to withdraw or modify this approval based on subsequent information,
including information indicating that this BMP does not satisfy MSD rules, requirements, or
construction specifications. This approval shall be for a period of two (2) years from the date of
this letter.
Sincerely,
Michael T. Buechter, P.E.
Principal Engineer (BMP Committee Chairman
Engineering/Design
Metropolitan St. Louis Sewer District
pc: Danny Rowatt, Sales Agent, Municipal Equipment Company, Inc., St. Louis, MO.