THE JOURNAL FOR SURFACE WATER QUALITY PROFESSIONALS

Developers Go Green

March/Apri l 2014 | www.stormh2o.comMarch/Apri l 2014 | www.stormh2o.com

Envision Rating SystemLand Use and StormwaterEnhanced Street Sweeping

Also inthis issue:

TABLE OF CONTENTS

4 March/April 2014 | StormH2O.com

STORMWATER (ISSN 1531-0574) is published eight times annually (bimonthly with an extra issue in May and October) by Forester Media Inc., 2946 De La Vina Street, Santa Barbara, CA 93105, 805-682-1300, fax: 805-682-0200, e-mail: publisher@forester.net, website: www.forester.net. Periodical postage paid at Santa Barbara, CA, and additional mailing offices. All rights reserved. No part of this publication may be reproduced in any form without written permission from the publisher. Entire contents ©2014 by Forester Media Inc. POSTMASTER: Please send address changes to Stormwater, 440 Quadrangle Drive Ste E, Bolingbrook, IL 60440. Changes of address can be completed online at www.stormh20.com/subscribe or mailed to 440 Quadrangle Drive Ste E, Bolingbrook, IL 60440; please provide your mailing label or old address in addition to new address; include zip code or postal code. Allow two months for change.

Editorial contributions are welcome. All material must be accompanied by stamped return envelopes and will be handled with reasonable care; however, publishers assume no responsibility for safety of art work, photographs, or manuscripts. Every precaution is taken to ensure accuracy, but the publishers cannot accept responsibility for the correctness or accuracy of information supplied herein or for any opinion expressed. Subscription rates: Eight issues of Stormwater are $76 per year in US, $95 in Canada, $160 elsewhere. Send the completed subscription card with a check to Stormwater, 440 Quadrangle Drive Ste E, Bolingbrook, IL 60440. Reprints: All editorial material in Stormwater is available for reprints. Call 805-679-7604 or e-mail reprints@forester.net for additional information. Articles appearing in this journal are indexed in Environmental Periodicals Bibliography. Back issues may be ordered (depending on available inventory) for $15 per copy in US, $20 in Canada, $35 elsewhere. Send written requests for back issues along with check or money order in US funds payable to Stormwater, PO Box 3100, Santa Barbara, CA 93130, USA. Provide address to where the copies should be shipped. Allow six weeks for delivery.

EDITORJanice Kaspersen - jkaspersen@forester.net

PRODUCTION EDITORWilliam Warner

MANAGING PRODUCTION EDITORBrianna Benishek

IT/ONLINE SUPPORTChris Pratt

WEBSITE EDITORNadia English - nenglish@forester.net

DIRECTOR OF ONLINE MEDIA & ITJeffrey Pascone

GROUP EDITORJohn Trotti - jtrotti@forester.net

SENIOR BRAND MANAGERSMark Gersten, Geoff Solo, Michelle Maple, Eileen Duarte

BRAND MANAGERSDon Weimer, Shane Stevens,Glenys Archer, Jonathan Kintzele

SALES & MARKETING COORDINATORCarmody Cutter

ADVERTISING SALES MANAGERRon Guilbault - rguilbault@forester.net

GRAPHIC DESIGNERDeja Hsu

SENIOR DESIGNERTyler Adair

PRODUCTION TECHNICIANDavid Naj

PRODUCTION MANAGERDoug Mlyn

ART DIRECTORJudith Geiger

DIRECTOR OF CIRCULATIONSteven Wayner - swayner@forester.net

MARKETING COORDINATOR, EDUCATION & TRAININGAmber McEldowney - amceldowney@forester.net

PROGRAM MANAGER, EDUCATION & TRAININGJane Schuster - jschuster@forester.net

DIRECTOR OF EDUCATION & TRAININGBeth Tompkins - btompkins@forester.net

CONFERENCE SALES & MARKETINGBrigette Burich - bburich@forester.net

CONFERENCE DIRECTORScott Nania - snania@forester.net

ACCOUNTANT/CHAIR, LOVE & HAPPINESS COMMITTEECourtney Keele

AR/APKeith Rodgers

FINANCE & HR MANAGERJohn Pasini - jpasini@forester.net

OFFICE ADMINISTRATORKathy Martin

PUBLISHERDaniel Waldman - dwaldman@forester.net

Departments6 Editor’s Comments

8 Guest Editorial

51 Spotlight

52 Showcase

55 Marketplace

55 Advertiser’s Index

56 Project Profi le

58 Reader Profi le

FEATURES

16 Quantifying Nutrient Removal by Enhanced Street Sweeping By Lawrence Baker, Paula Kalinosky, Sarah Hobbie, Ross Bintner, and Chris Buyarksi

24 Developers Go Green for Suburban Stormwater Management Green infrastructure can translate to lower costs and greater profits. By Margaret Buranen

36 Institute for Sustain-able Infrastructure’s Envision Rating System An overview and application to stormwater management programsBy Rebecca Morris and Dave Briglio

40 Quantifying Urban Land-Use Impacts on Suspended Sediment Particle Size Class DistributionA method and case study By Elliott Kellner, Jason A. Hubbart, and Thomas Smith

Stormwater March/April 2014 | Volume 15, Number 2

SIGN UP For Your Free SubscriptionGo online for new subscriptions, renewals, or change of address. www.stormh2o.com

Scan here to share this or subscribe later. Get the app at http://gettag.mobi

2424

1616

56 Cover illustration: iStock/mygueart

56 March/April 2014 | StormH2O.com

As is not uncommon in most parts of North America, the township of North Glengarry, ON, struggled with wastewa-

ter system overcapacity. The situation had been known for some time, but it was after the region was slammed with a 50-year rain event—during which 6 to 8 inches of rain fell in one hour—that the township knew it had to act.

Infl ow and infi ltration (I/I) through leaky manholes wasn’t the only reason for severe fl ooding and sewer backups—especially in light of the intensity of the storm combined with 60-year-old infrastructure—but it was

a signifi cant factor. So when North Glengarry water works manager Dean McDonald discovered the Lifespan System, he knew he found something valuable.

The Lifespan System is a rubber manhole frame with a locking cover system, manufactured and distrib-uted by Hamilton Kent. In addition to absorbing impact and vibration from traffi c, which in turn reduces the concussive load on the surrounding asphalt and the underlying concrete structure, Lifespan is also completely water-tight. It prevents sewer surcharge up to 3 psi and rainwater infl ow

up to 13 psi. For municipalities, that means not having to convey and treat rainwater in their sanitary sewer sys-tems—another challenge that North Glengarry was facing.

The township of North Glen-garry decided to pilot eight units for immediate installation. The fi rst four Lifespan units were installed in on-road locations. The others were designated for off-road use near a very active creek, which was decidedly critical for controlling I/I. The creek

often overfl ows, and the town-ship didn’t want the extraneous water adding to its overcapacity problems. It also didn’t want sewer overfl ows to contaminate

Eastern Ontario Township Eliminates Infl ow and Infi ltrationNorth Glengarry, ON, had to address strained capacity issues in its sanitary sewer systems.

PROJECT PROFILE

North Glengarry installed eight Lifespan units in on- and off-road locations.

StormH2O.com | March/April 2014 57

the creek and affect its wildlife. McDonald has reported impres-

sive results and “zero issues,” with the installations, and he has since ordered more units. “Lifespan is one of a kind,” he adds. “I’d never heard of frames built out of rubber, but they are working great—they held up really well last winter.”

As an added benefi t, McDonald appreciates the ease with which the lightweight Lifespan System was installed, as well as the ease of reinstalling the covers after they are opened up and inspected. This is especially true of the covers now available in composite mate-rial, weighing signifi cantly less than the cast-iron model used by North Glengarry.

“We’re conducting manhole inspections across town, so every manhole cover will be opened,” he explains. “The operators are cursing the old-style covers that we were using before the Lifespan Systems. They are almost impossible to rein-stall properly, whether you’re trying to line up the bolt holes or trying to keep the gaskets in place.”

Rehabilitating manholes is one of many layers of North Glengarry’s infrastructure plan, but it is not a small one. By eliminating I/I at these access points alone, the residents will save money they would otherwise spent on treating extraneous water at the plant and cleaning up after overfl ows.

As Henry Flattery of Hamilton Kent notes, “It takes 1,000 kWh to treat

a million gallons of wastewater. If up to 50% of what you are treating is rainwater, the positive impact on our resources and environment by elimi-nating extraneous water from sanitary systems is staggering.”

As infrastructure repair and replace-ment becomes more of a continent-wide issue, municipalities will need to keep an eye on what lies beneath. Underground infrastructure, sewers, and manhole access—though out of

sight and often out of mind—continue to be a lynchpin for improving the safety, energy-effi ciency, and, increas-ingly, disaster resiliency of our communities.

For related articles: www.stormh2o.com/project-design

Streambank Restoration Basics & Techniques

FORESTER UNIVERSITY PRESENTS

BRINGING YOU CUTTING-EDGE TECHNOLOGY AND TOOLS–ANYTIME, ANYWHERE

Like us @ Forester.UniversityFollow us @ ForesterU Add us @ Forester.UniversitySubscribe @ ForesterUniversity

FU_S

W14

03_M

aste

r_st

rmb

nk_5

i

2-SESSION SERIES March 11th & 13th @ 11am PDT / 2pm EDTEarn 3 PDH / 0.3 CEU

with David T. Williams, Ph.D., P.E., PH, CFM, CPESCDTW and Associates

New 2-Session Streambank Restoration Series!

Register today

@ ForesterUniversity.net!

Earn 3 PDH / 0.3 CEU