Stormwater Management Technical Seminar - Armtec

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Information about Stormwater Management Technical Seminar - Armtec
Education

Published on February 28, 2014

Author: Armtecltd

Source: slideshare.net

Description

This informative tutorial by industry leading Armtec will provide an introduction to Stormwater treatment and the large number of regulations present in Canada. The tutorial will present a range of products to meet various Stormwater treatment regulations and will provide guidance on proper selection and sizing of the products, which is a key question in the development of many projects. Learn how to achieve greener projects through effective particle removal, water retention and infiltration. Stormwater detention will be addressed during the tutorial.

A range of products and application cases will be covered including the VortSentry, Vortechs and StormFilter units and ChamberMaxx stormwater detention/infiltration products.

Webinar STORMWATER MANAGEMENT TECHNICAL SEMINAR February 2014 1 © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary

Webinar STORMWATER MANAGEMENT

JOIN THE DISCUSSION! 3 © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 3

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 webinars@armtec.com © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary Will send certificate 4

Professional Development Hours (PDH) • 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.pd f 5 © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 5

THE HOST Patrick McDonald, P Eng. Business Development Engineer Drainage Solutions Armtec Ltd. Email: patrick.mcdonald@armtec.com cell: 514-216-8795 STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 6

Armtec is a leading global infrastructure and construction materials company. • 43 locations in Canada • Approximately 2,000 employees • Exceptional product range for: – Stormwater Treatment – Stormwater Detention and Infiltration STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 7

ABOUT ARMTEC STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 8

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 © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 9

Stormwater Management REGULATIONS STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 10

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 © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 11

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 © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 12

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 © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 13

Stormwater Management HYDRODYNAMIC SEPARATION (HDS) STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 14

HYDRODYNAMIC SEPARATION (HDS) Standalone Treatment BMP • New Development • Redevelopment • Retrofit LID Pretreatment • Surface Infiltration • Subsurface Infiltration • Rainwater Harvesting STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 15

HDS FUNDAMENTALS 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 STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 16

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 3. Typically set at 80% removal Basis for calculation • Net annual removal • Single event sizing STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 17

STORMWATER RUNOFF Particle Size Distributions - Stormwater Runoff and Street Dirt 100 90 Sartor & Boyd (1972) NCDNRCD (1983) 80 Fraction Finer by Weight (%) Ball & Abustan ( 1995) Sartor et al. (1974) 70 Shaheen (1975) Ellis (1986) 60 Bellinger (1982) Sansalone (8 April 1995) 50 Sansalone (30 April 1995) Sansalone (15 July 1995) Sansalone (8 Sept 1995) 40 Sansalone (3 Oct 1995) CRC Project (1999) 30 Hopke (1980) Kurahashi & Associates (1997) 20 ME DOT Road Sand Gradation NJCAT TSS Gradation 10 WASDOE Sil-Co-Sil 106 NURP Average 0 1 10 100 1000 10000 Particle Size (micron) STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 18

“TSS” REMOVAL 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 STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 19

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 © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 20

SIZING METHODS – NET ANNUAL REMOVAL • Several Common Proprietary Methods o Continuous simulation o Binned rainfall intensities, flow rates and removal efficiencies o 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 © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 21

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 © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 22

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 © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 23

BENEFITS OF OFFLINE UNITS • 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 STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 24

Stormwater Management HDS PRODUCTS STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 25

VORTECHS 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 o • Pretreatment configuration High flows 3’ sump w/ unobstructed access o o STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary Easy to inspect Reduced maintenance costs 26

VORTECHS Shallow Horizontal Profile STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 27

VORTECHS Vortech’s System STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 28

VORTECHS City of Victoria, BC STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 29

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 © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 30

31 © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary

NEW MILLENNIUM HOMES STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 32

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 © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 33

VORTSENTRY STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 34

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 o STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary Vacuum cleaning sump area o • Maintain when sediment depth is 3’ in sump Visually inspect internals Maintenance Documentation 35

36 © 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 © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 37

Stormwater Management FILTRATION STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 38

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 © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 39

THREE CARTRIDGE OPTIONS 27” 3.05 ft System Size STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 18” 2.3 ft 12” 1.5 ft System Size System Size 40

STORMFILTER MEDIA PhosphoSorb™ Perlite CSF® Leaf Media ZPG Sediments Phosphorous Oil and Grease Soluble Metals Organics Nutrients STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 41

STORMFILTER CONFIGURATIONS Vault Manhole 0.23 cfs capacity at 15 gpm per 18” cartridge (6.5 l/s at 0.95 L/s per cartridge) Up to 1.2 cfs at 15 gpm per 18” cartridge (33 l/s at 0.95 L/s per cartridge) STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary Larger systems are available in panel vaults, box culverts, and CIP vaults 42

STORMFILTER MAINTENANCE STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 43

Stormwater Management INFILTRATION STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 44

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 © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 45

CHAMBERMAXX SPECIFICATIONS • 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 STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 46

SIZING • 76.7 CF Installed Storage Volume per middle chamber • 6” of surrounding stone w/ 40 % porosity is standard for volume calculation STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 47

OPTIONAL CONTAINMENT ROW • • • • • STORMWATER MANAGEMENT © 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) 48

STRUCTURAL DESIGN  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’ STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 49

Stormwater Management DETENTION STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 50

BASSINS IN ALL MATERIALS STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 51

Stormwater Management QUESTIONS? STORMWATER MANAGEMENT © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 52

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 © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 53

Join Us on Social Media! Follow us on social media to learn more about our company, projects and people, while getting all the latest Armtec and industry news. 54 © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary

Contact Your Local Rep: www.armtec.com/contact-us Today’s Host: Patrick McDonald patrick.mcdonald@armtec.com 514-216-8795 55 © 2013 Armtec Infrastructure Inc. • Confidential & Proprietary 55

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