Stormwater Management Technical Seminar - Armtec
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Transcript of Stormwater Management Technical Seminar - Armtec
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
Webinar
STORMWATER MANAGEMENT
February 2014
TECHNICAL SEMINAR
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Webinar
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
JOIN THE DISCUSSION!
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
CPD CREDIT CERTIFICATES
• Qualifies in Most Jurisdictions in Canada & USA for 1 Hour Technical Informal
• Formal completion certificates are emailed within one week of attending
• Check your local guidelines if unsure of your requirements
Email Your Attendance List:
• Full Name• Title• Email
Will send certificate
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
• Qualifies as 1 hour Informal (20 Professional Development Hours maximum per year)
• If you have provided an e-mail and are logged on throughout the presentation, a formal completion certificate will be sent to you within one week
• Enter CPD activities in the APEGBC On-line Reporting Centre: http://www.apeg.bc.ca/prodev/online.html
• A full copy of the Continuing Professional Development (CPD) Guideline can be viewed at: http://www.apeg.bc.ca/prodev/documents/cpdguideline.pdf
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Professional Development Hours (PDH)
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
THE HOST
Patrick McDonald, P Eng.Business Development Engineer
Drainage Solutions
Armtec Ltd.
Email: [email protected]
cell: 514-216-8795
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
• 43 locations in Canada• Approximately 2,000 employees• Exceptional product range for:
Armtec is a leading global infrastructure and construction materials company.
– Stormwater Treatment– Stormwater Detention and Infiltration
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
ABOUT ARMTEC
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
STORMWATER MANAGEMENT
AGENDA
1) Regulations Overview
2) Hydrodynamic Separation
• Vortechs
• VortSentry
3) Filtration
• StormFilter
4) Detention & Infiltration
• ChamberMaxx
• Detention (PeHD, CSP, Concrete or DuroMaxx)
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
Stormwater Management
REGULATIONS
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
WESTERN CANADA REGULATIONS
Calgary currently has the most stringent regulations
• Require calculations showing 90% treatment of the total runoff volume
• Minimum annual TSS removal rate of 85% for particle sizes 50 um and greater for each and
every year
• Minimum one year of sediment storage capacity without scouring
• Maximum hydraulic loading rate of 27 L/s/m2
Most other cities in Alberta and British Columbia require treatment of 80% for
particle sizes 75 um and greater
We have seen quite a bit of interest in the VortClarex coalescing plate oil water
separator for use at power substations and gas stations.
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
EASTERN CANADA REGULATIONS
Toronto currently has the most stringent regulations
• Require 90% treatment of the total annual runoff volume
• Require minimum annual TSS removal rate of 80% for particle sizes 20 um and greater
• Typically requires use of a filtration product
Ontario MOE has three levels of treatment, the highest requires 90% treatment of
the total annual runoff volume & 80% TSS removal for particle sizes 50 um and greater
Quebec follows NJDEP guidelines. HDS products are rated for 50% TSS removal.
Levis has unique approval based on Peclet scaling.
Most cities in the Atlantic Provinces require treatment of 80% for particle sizes
75 um and greater
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
NEW NATIONAL OGS PROTOCOL/VERIFICATION PROCESS
ETV Canada, TRCA and stormwater stakeholder group created a new
laboratory protocol for oil grit separators
2013 NJDEP lab protocol used as a starting point with revisions made to meet
goals of Canadian program
Resulting protocol is most detailed and thorough created to date
Protocol mandates data collection across wide range of operating conditions
Will take several years before majority of OGS devices complete program due
to complex protocol and limited qualified 3rd party test facilities
Protocol: http://etvcanada.ca/home/protocols-and-procedures/
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
Stormwater Management
HYDRODYNAMIC SEPARATION (HDS)
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
HYDRODYNAMIC SEPARATION (HDS)
Standalone Treatment BMP
• New Development
• Redevelopment
• Retrofit
LID Pretreatment
• Surface Infiltration
• Subsurface Infiltration
• Rainwater Harvesting
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
Low velocity vortex action
• Increases efficiency by increasing length
of flow path
• Concentrates solids in low velocity flow
field
Flow controls
• Minimizes turbulence and velocity
• Prevents flow surges and re-suspension
• Retains floating pollutants
Maintenance
• Pollutants are captured in an easily
accessed structure
HDS FUNDAMENTALS
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
HDS SYSTEM SPECIFICATION
1. Target Pollutant Characteristic
• Targeted particle size or particle size
distribution
2. Numeric Performance Goal
• Removal Efficiency or Effluent
Concentration target
o Typically set at 80% removal
3. Basis for calculation
• Net annual removal
• Single event sizing
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
STORMWATER RUNOFF
STORMWATER MANAGEMENT
0
10
20
30
40
50
60
70
80
90
100
1 10 100 1000 10000Particle Size (micron)
Fra
ctio
n F
ine
r b
y W
eig
ht
(%)
Sartor & Boyd (1972)
NCDNRCD (1983)
Ball & Abustan ( 1995)
Sartor et al. (1974)
Shaheen (1975)
Ellis (1986)
Bellinger (1982)
Sansalone (8 April 1995)
Sansalone (30 April 1995)
Sansalone (15 July 1995)
Sansalone (8 Sept 1995)
Sansalone (3 Oct 1995)
CRC Project (1999)
Hopke (1980)
Kurahashi & Associates (1997)
ME DOT Road Sand Gradation
NJCAT TSS Gradation
WASDOE Sil-Co-Sil 106
NURP Average
Particle Size Distributions - Stormwater Runoff and Street Dirt
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
“TSS” REMOVAL
STORMWATER MANAGEMENT
There’s more than “TSS” in stormwater
• TSS is a wastewater method that tends to exclude larger
particles
• Suspended Solids Concentration (SSC) is a more
complete measurement of stormwater solids
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
PARTICLE SIZE SPECIFICATION
• Settling velocity increases exponentially with particle diameter
• Silica based lab references available for HDS system testing
• Range of effectiveness for HDS systems is 50 microns and larger
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
SIZING METHODS – NET ANNUAL REMOVAL
• Several Common Proprietary Methods
o Continuous simulation
o Binned rainfall intensities, flow rates and removal efficiencieso Probabilistic method
• All Methods require many important assumptions
o Is performance data modeled, lab or field generated?
o Are colligative properties assumed for fine particles?
o Does all rainfall produce runoff?
o Is bypassed water always clean?
• The most aggressive, least comparable sizing method
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
SIZING METHODS – SINGLE EVENT
Achieve performance target at a peak flow rate
• Water quality flow rate typically calculated using the rational method Q=CiA
o i.e. 0.5”/hr * 1 acre * .9 runoff coefficient = 0.45 cfs
• May also be the peak flow rate resulting from a design storm depth
distributed over a hydrograph
o i.e. Peak intensity in 0.5” Type II storm with 30 min tc = 0.15 cfs
• Annual performance will exceed design storm performance
• Directly comparable between technologies
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
SYSTEM DESIGN CRITERIA
• Identify target pollutants (TSS, oil, trash)
• Establish sizing method (WQ flow/point on a curve vs. average annual load)
• Establish water quality flow
• Calculate peak design flow
• Calculate HGL
• Size to meet WQ requirements
• Evaluate bypass requirements if Qmax > Qtreatment
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
BENEFITS OF OFFLINE UNITS
STORMWATER MANAGEMENT
• Units are designed to treat
the entire water quality flow
rate
• Offline units are better suited
in shallow applications where
longer weirs are needed to
pass the peak flows.
• Systems installed offline
prevent re-suspension of
solids in high flow situations
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
Stormwater Management
HDS PRODUCTS
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
VORTECHS
STORMWATER MANAGEMENT
Key Features:
• Shallow Profile (typically 7’ inside height)
o Reduced excavation costs
• Proven Technology
o Lab + 3rd Party Field Testing, approved by
WADOE, NJDEP and others
• Targets fine particles (typically 50 um)
• Very customizable
o Pretreatment configuration
o High flows
• 3’ sump w/ unobstructed access
o Easy to inspect
o Reduced maintenance costs
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
VORTECHS
Shallow Horizontal Profile
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
VORTECHS
Vortech’s System
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
VORTECHS
STORMWATER MANAGEMENT
City of Victoria, BC
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
VORTECHS MANAGEMENT
• Frequency
o Site specific (land use type and human activities)
o Recommend quarterly inspection in first two years
o Most systems require cleanout annually
• Maintenance Procedure
o Floatable materials removal
o Vacuum cleaning sump area
o Visually inspect internals
• Maintenance Documentation
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
VORTECHS MANAGEMENT
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
NEW MILLENNIUM HOMES
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
VORTSENTRY
• Compact design ideal for congested sites
• Houses an internal bypass and treatment in
one structure
• Lightweight design eases installation
• Unobstructed maintenance access
• typically does not require confined space entry
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
VORTSENTRY
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
VORTSENTRY
• Frequency
o Site specific (land use type and human
activities)
o Recommend quarterly inspection in first two
years
o Most systems require cleanout annually
• Maintenance Procedure
o Maintain when sediment depth is 3’ in sump
o Vacuum cleaning sump area
o Visually inspect internals
• Maintenance Documentation
STORMWATER MANAGEMENT
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VORTSENTRY
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
HD SUMMARY
• Target settleable solids and floating pollutants
• Proven Technology
o Performance tested
• Standalone treatment (where regulations allow)
• Ideal pretreatment systems
o Reduce maintenance costs of land based or proprietary systems
• Ability to treat wide range of flows
• Low cost per CFS treated
Easy to inspect and maintain
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
Stormwater Management
FILTRATION
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
STORMFILTER: DESIGNED FOR LONGEVITY
• Cartridge hood separates media from floating
grease and gross pollutants
• Scrubbing regulators agitate media surface and
extend service life
• Flow rate controlled at 1gpm or 2gpm/sf to
extend media life
• Siphon actuated cartridge uses entire media
column, even during small events
• Media gradation selected to balance
performance and longevity
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
THREE CARTRIDGE OPTIONS
STORMWATER MANAGEMENT
27” 18” 12”
System Size
System Size
System Size
2.3 ft
3.05 ft 1.5
ft
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
STORMFILTER MEDIA
STORMWATER MANAGEMENT
PhosphoSorb™ PerliteCSF®
Leaf MediaZPG
Sediments ■ ■ ■ ■
Phosphorous ■ ■
Oil and Grease ■ ■ ■ ■
Soluble Metals ■ ■ ■
Organics ■ ■
Nutrients ■ ■ ■ ■
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
STORMFILTER CONFIGURATIONS
STORMWATER MANAGEMENT
Up to 1.2 cfs at 15 gpm
per 18” cartridge (33 l/s at 0.95 L/s per cartridge)
Vault
0.23 cfs capacity at 15 gpm per 18” cartridge
(6.5 l/s at 0.95 L/s per cartridge)
Manhole
Larger systems are available in panel vaults, box culverts, and CIP vaults
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STORMFILTER MAINTENANCE
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
Stormwater Management
INFILTRATION
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
CHAMBERMAXX
• Plastic open-bottom infiltration chambers
• Reduce and/or eliminate site runoff
• Meets LEED and LID objectives
• Most cost effective for shallow applications
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
• Injection Molded
Polypropylene
• 51.4” Span x 30.3” Rise x
7’7” Long
• Integral End Walls
• 6% greater storage over
competitive systems
*Pre-Treatment Recommended
CHAMBERMAXX SPECIFICATIONS
STORMWATER MANAGEMENT
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SIZING
• 76.7 CF Installed Storage Volume per middle chamber
• 6” of surrounding stone w/ 40 % porosity is standard for volume
calculation
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
• Provides Maintenance Access• 20 Mil HDPE Durable Liner• Diversion Manhole w/ bypass & drain
down orifice• Maintain w/ reverse jet nozzle• C+F also available (Containment +
Filtration)
OPTIONAL CONTAINMENT ROW
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
Full scale in-ground burial tests HS-20 / HS-25 live loads (AASHTO LRFD Design) 18” Minimum cover (can reduce with design modification) Chamber spacing minimum of 5 inches Maximum cover is 10’
STRUCTURAL DESIGN
STORMWATER MANAGEMENT
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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
Stormwater Management
DETENTION
STORMWATER MANAGEMENT
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BASSINS IN ALL MATERIALS
STORMWATER MANAGEMENT
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Stormwater Management
QUESTIONS?
STORMWATER MANAGEMENT
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UPCOMING MONTHLY WEBINARS
Monthly Webinars for Armtec
Drainage Solutions:
www.armtec.com/webinars/
Upcoming:
March 21, 12pm EST | Bridge Plate
Ron Prychitko
Randy McDonald
STORMWATER MANAGEMENT
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