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Appendix C - Stormwater Management Plan
Attached to the e-mail MCU15/0095 & REC15/0022 Development Application Stormwater Mgmt Plan (2 of 3).
Original PDF page 72, section 1. The text section number identifies this passage in the reader.
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Log in to see the plans as drawnSpecifications & Details
General Description
This technology is a post developed stormwater treatment
system. The SPEL StormSack provides effective filtration
of solid pollutants and debris typical of urban runoff, while
utilising the existing or new storm drain infrastructure.
The StormSack is designed to rest on the flanges of
conventional catch basin frames and is engineered for
most hydraulic and cold climate conditions.
Installation And Maintenance
Installation procedures shall include removing the storm
grate, cleaning the ledge of debris and solids, measuring
catch basin clear opening and adjusting flanges to rest on
grate support ledge. Install SPEL StormSack with splash
guard under curb opening so the adjustable flanges are
resting on the grate support ledge. Install corner filler
pieces. Reinstall storm grate directly on support flanges
{rise shall be no more than 1/8 inch (3 mm)].
Maintenance: Typically the SPEL StormSack is serviceable
from the street level, and therefore maintenance does not
require confined space entry into the catch basin structure.
The unit is designed to be maintained in place with a
vacuum hose attached to a sweeper or a vactor truck. The
oil boom is also designed to easily be replaced from the
street level. Use only SPEL replaceable parts.
Products
Material and Design
A. Adjustable Flange and Deflector: Aluminum Alloy
6063-T6
B. Splash Guard: neoprene rubber
C. Stormsack: woven polypropylene geotextile with US
Mesh 20
D. Corner Filler: Aluminum Allow 5052-H32
E. Lifting Tabs: Aluminum Allow 5052-H32
F. Replaceable Oil Boom: polypropylene 3 inch
(76 mm) diameter
G. Mesh Liner: HDPE, diamond configuration
H. Support Hardware: CRES 300 Series
Typical Performance Characteristics
A. Debris capacity: 8.5cu. ft. (0.24 m3)
B. Filtered flow rate: 7.3 cfs (207 Ips)
C. Primary baffled bypass flow rate: 4.2cfs (119 lps)
D. Secondary bypass flow rate: 0.4 cfs (10 lps)
E. Total bypass flow rate: 4.6 cfs (130 lps)
F. Oil boom sorption capacity: 376 oz (11 L)
Recommended minimum clearance from bottom of SPEL
StormSack to inside bottom of vault is 2 inches (60 mm)
Typical frame adjustability range of 5 inches (127 mm) in
each direction.
Benefits
e Low cost gross pollutant capture
© Quick & easy installation
¢ Simple maintenance
e At source capture
e Adjusts to custom pit sizes
Field Performance
The SPEL Stormsack was introduced to the Australian
market in 2012 and field testing is underway at several
locations in South-east Queensland. Laboratory testing
has shown capture of 99.99% of gross pollutants up to the
bypass flow rate.* Further results will be provided as they
become available.
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