Trenchless Technology: Trenchless Technology:

Trenchless Technology:Trenchless Technology:

NOT A BORING SUBJECT

NC AWWA-WEA

95th AnnualConference

November 15-18, 2015Raleigh Convention Center | Raleigh, NC

NC AWWA-WEA3725 National Drive, Suite 217Raleigh, NC 27612ADDRESS SERVICE REQUESTED

The official publication of The North Carolina Section of the American Water Works Association (NC AWWA) & The North Carolina Member Association of the Water Environment Federation (NC WEA)

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DEPARTMENTS

Tel: 866-985-9780 Fax: 866-985-9799 www.kelmanonline.comManaging Editor: Christine HanlonDesign/layout: Jackie MagatSales Manager: Al WhalenAdvertising Coordinator: Stefanie Hagidiakow

NC Currents is published by

3725 National Drive, Suite 217Raleigh, NC 27612Phone: 919-784-9030Fax: 919-784-9032

Executive Director: LINDSAY [email protected] Areas: Board of Trustees, Legal & Regulatory Issues, Conference Planning, Policy Development, Budget & Finance Administration

Financial Assistant: MARIANNE [email protected] Areas: Professional Wastewater Operators Committee, Exhibits, Financial Data Entry and Reports, Job Ads, Sponsorships

Director of Education: CATRICE R. [email protected] Areas: Seminars, elearning, Schools and Conferences

Membership and Communications Director: NICOLE [email protected] Areas: NC Currents Submissions, Web Site Information (submissions, updates, etc.), eNews Submissions, Sponsorships, Membership

External Committee Services Coordinator: ERIN MALLISFocus Areas: Awards, Public Education Committee, Water For People Committee, Students & Young Professionals Committee, Membership Support

NC Currents is the official publication of the NC AWWA-WEA. Members and non-members, individuals and committees are encouraged to submit content for the magazine. If you would like to submit an article to be considered for publication in NC Currents, please email it to [email protected].

Submission Deadline: Winter 2015/16 - October 5, 2015 Spring 2016 - Early January 2016 Summer 2016 - Early April 2016 Fall 2016 - Early July 2016

NC Currents is produced by the Communication Committee. Chair: Sherri Moore - City of Concord, Vice Chair: Mike Shelton - Kimley-Horn Associates, Editorial Subcommittee: Tom Bach - City of Concord;Kelly Boone - CDM Smith;Marianna Boucher - McKim & Creed;Steve Hilderhoff - GHD;Marco Menendez - McAdams;Sherri Moore - City of Concord;Wade Shaw - City of Raleigh;Mike Shelton - Kimley-Horn;Marie Sugar - STV

24 34 92

All rights reserved. The contents of this publication may not be reproduced in whole or in part without the express consent of the publisher.

FEATURES

Message from the Chair ................................................................................... 7Executive Director’s Report ............................................................................... 9Board of Trustees Meeting Summaries .............................................................13Committee Chairs ............................................................................................14Committee Spotlights ......................................................................................17Member Portrait: Steve Hilderhoff .................................................................. 22Member Portrait: Aaron Brower ...................................................................... 24Spotlight on our Supporters ............................................................................ 27Plant Spotlight: Hominy Creek Water Reclamation Facility ............................... 34Certification Corner ........................................................................................ 98Operator’s Tailgate ........................................................................................ 100Welcome New Members .............................................................................. 102

News and Notes ........................................................................................... 105Schedule of Events .........................................................................................110Advertiser Information Center ........................................................................112

NC AWWA-WEA 95th Annual Conference .......................................39

NC AWWA-WEA 15th Annual Spring Conference ............................57

An Overview of Thermal Hydrolysis – North America’s Hot New Biosolids Technology ............................87

Water For People ...............................................................................92

NC Safewater Endowment Update ...................................................95

Special Section: Trenchless Technology ....................................................61

What is Trenchless Technology? .............................................................................62

Tunnel Vision – A Primer on Trenchless Construction Methods

and Experiences for Pipelines in the Piedmont Geology ....................................66

Getting Reacquainted with Sewer Rehab .............................................................70

Two New Promising Tools for the Condition Assessment

of Ferrous Pressure Pipelines .................................................................................... 74

Plan B for HDD: Customizing a Challenging Installation ....................................78

North Carolina Takes the Lead in

Water Main and Force Main Pipe Bursting ...........................................................82

Trenchless Technology: NOT A BORING SUBJECT






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Message from the Chair

Chris Belk, PE, Associate, Hazen and Sawyer, P.C.

his is my final Chair’s Message and a time to reflect on what we have accomplished, and extend kudos

to our volunteers and members who have persevered through this second year of our transition to a new educational model. Reviewing the strategic plan, I see that we have made tremendous progress this year towards achieving our goals, including accomplishing the following;• Three successful institutes (Charlotte,

Raleigh, Cape Fear Public Utilities Authority)• Inaugural Academy at the Collections and

Distributions Schools• Water For People Fun Runs in Charlotte

and Raleigh• GROW events in Charlotte, Raleigh,

Asheville, and Wilmington• Reformed and combined the Water

Resources and Reuse committees• Reformed the Biosolids committee• Initiated our Leadership Mentoring program• Held the first Grade 4 Maintenance Exam• Held inaugural Model Water Tower

Competition in Charlotte, and 8th Annual Model Water Tower Competition in Raleigh

• Transitioned the Spring Conference to Asheville, NC for 2016 (In the forseeable future we will alternate between the mountains and the coast to better serve our members from Manteo to Murphy).

This is not an invitation to sit back on our laurels because there is still a tremendous amount of work to do. To continue with our sailing analogy, we had a great final leg for this heat, but we still have to dock the boat and get ready for tomorrow’s race. If you have done any boating, you will know that docking can

provide a lot of entertainment and produce some colorful language. Docking requires a significant amount of forethought and communication with the crew and is the absolute wrong time to relax. You have to contend with other boats, currents, wind, and you don’t want to damage the boat (or lose a crew member overboard) by ramming into the dock. There are nails, barnacles, cleats, lifelines, booms, stays, anchors, and all sorts of other obstacles that always seem to find a way to catch a foot or toe.

You may be surprised to hear that, despite our careful planning and top-notch crew, we nearly lost our 2016 Annual Conference overboard this year. On our approach it was noted that the slip to which the dockmaster was directing us was under construction and didn’t have an electrical hookup. The Winston-Salem convention center is going to be in the middle of major renovations, including a change to the exhibit hall that eliminates the floor drain required for the pipe tapping contest. The committee and staff acted quickly and changed our 2016 slip to Raleigh, and negotiated use of the renovated Winston-Salem facilities for our 100th Annual Conference in 2020 (with a provision to include the required floor drain).

Fortunately, that was it for the “docking” drama this quarter. It does seem that we are, however, experiencing some crew fatigue. Despite the fact that we are doing more than ever, and providing high quality continuing education, our membership has declined slightly. This is where we most need your help. Don’t be bashful about approaching board members, committee chairs, council

chairs, or staff and let them know how we are or are not meeting your needs.

I am truly excited to read the articles in this Fall Edition of NC Currents on Trenchless Technology, a subject near and dear to my heart and daily life at Hazen and Sawyer as a member of our conveyance practice group. Our conveyance projects increasingly require tunneling under existing infrastructure, streams, or connecting different drainage areas. Please enjoy this issue, and if you haven’t already done so, please visit ncsafewater.org to update your profile in our new database so you can access and print your professional development hours from all of our events including the 95th Annual Conference in Raleigh, November 15-18.

Finally, I’d like to thank all of you for making this a great year for NC AWWA-WEA. I would be greatly remiss if I did not extend thanks to my employer (Hazen and Sawyer) and my family (Caroline, Max, Chloe, and Lily), without whose support I could not have served you as Chair this year. There are too many people to thank for their efforts advancing NC AWWA-WEA this year, but I’d like to extend a special thanks to a few of whom I am aware that have truly extended themselves this year. These include Dave Saunders and Greg Morgan for their efforts developing the Academy, Del Harney and Brandon Garner for the Grade 4 Maintenance Exam, Betsy Drake and Erika Bailey for our Institute Program, and John McLaughlin for the Leadership Mentoring program. A special thanks to all our Board, Council Chairs, Task Force Members, and Committee Chairs for their leadership as we navigated a lot of new territory this year.

Docking 101

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Executive Director’s Report

C AWWA-WEA, as most of you know, is the North Carolina Section of the American Water

Works Association (AWWA) and the North Carolina Member Association of the Water Environment Federation (WEF). At inception, AWWA was the drinking water arm of water education and WEF was the wastewater treatment arm.

Over the past 100 odd years, both national organizations have recognized that ‘water is water’ and have expanded their focus and reach to incorporate educational and regulatory focus on water in its many guises, while retaining their original and primary focus. Most of the State Sections and Member Associations have done likewise.

NC AWWA-WEA, however, has always been most unlike its sister Sections and Member Associations, in that it has, since it’s own inception more than 90 years ago, been a conjoined twin. Legally, NC AWWA-WEA is two completely separate and independent corporate entities, but it has functioned as one, with a single board, a single set of policies, and a single common purpose – to provide ALL North Carolinian water professionals with the best educational resources and support, regardless of the flavor, color, source, destination, or mechanics of the water.

This complex joint arrangement is sometimes difficult to steer and manage, but the enormous benefits of this unique jointed-ness that derive for Water Professionals in North Carolina has

Double the Value

been obvious – and provide a compelling motivation to the NC AWWA-WEA Board in its unfailing dedication to maintain it.

AWWA’s membership marketing efforts are targeted at utilities. AWWA utility membership allows 100% of employees to access NC AWWA-WEA’s services at member prices. WEF doesn’t have a membership category for utilities that extends those same benefits, but WEF does permit the Member Associations to have individual state-only members, and NC AWWA-WEA has taken advantage of this, creating the SLAM membership category. SLAM membership allows individual Water Professionals whose agencies or budgets are small, or that don’t cover membership, to become members for a cost that is about $5 per month, to take advantage of the outstanding educational offerings of NC AWWA-WEA at member prices, and better yet, to have personal receipt of NC Currents, all the quarterly training guides, and all e-news and e-communications. This is really good stuff and it’s really a good deal.

However, what SLAM members don’t have, is discounted access to the national educational resources, educational programs or direct communication that comes from AWWA or WEF. I’m going to tell you about some of that stuff, because I believe it’s fantastic, and that it’s valuable enough for you to think about being a member of both AWWA and WEF – which automatically makes you a member of NC AWWA-WEA.

I was lucky enough to be able to go to Anaheim in June, to attend the AWWA Annual Conference and Exposition. Although my specialty as your Executive Director, is non-profit association management, not water, I was bowled over at the Opening General Session, where Wallace J. Nichols, author of Blue Mind, told the story and showed film of a turtle, released from an aquarium on the California coast. That turtle had spent years in a tank, and had learned, as all captives do, exactly and precisely how many flaps of her flippers it took to reach the end of the tank where she had to turn or bump into the glass. A couple of thousand of us sat in that auditorium and watched underwater video as the turtle was released, pausing at the moment when she’d always had to turn, then realizing that there was no wall and that open ocean lay ahead of her. I’ll confess to shedding tears watching that moment, seeing her pace quickening as she swam past that point of no return. She made her way to the shore of Japan – perhaps her home.

Nichols asked each person in that audience to think of the first water they fell in love with – and he gave a blue marble to each of us in that Opening Session. He’s given more than a million of those marbles away since 2009. “Hold it at arm’s length, and that’s what Earth looks like from a million miles away – a small, blue, fragile, watery dot,” he said, “like the photo taken by the Apollo 17 crew, more than 40 years ago.” The rule of the marble

N




Executive Director’s Report

is to pass it along – with a story about why water matters to you, and why you are grateful for what people do to protect water and restore it.

My first water – the water I first fell in love with – and knew that I loved, was Zoo Lake, a very small lake in Johannesburg, South Africa. I first rode my bicycle there at the age of 11 – and often thereafter, without the knowledge or permission of parents, and used my pocket money to rent a wooden rowboat. A huge and cumbersome thing it was, but to me, it might as well have been Cinderella’s coach, or the wings of Icarus. Rowing is the most liberating sensation to me in all the world. Oars are my wings.

When I saw the turtle swim beyond the point of no return, I knew that feeling

– I know love of water, and love of those who protect and restore it.

A trip to WEFTEC this fall in Chicago will provide a similar opportunity. Rob Stewart, award-winning biologist, photographer, conservationist, filmmaker and author will discuss his film Revolution, which should help Water Professionals frame their own innovative and transformative efforts in sustainable water management.

Then there are the national association bookstores. Yes, yes, I know everything under the sun is online, but truly, you don’t know what’s available to you until you are standing in the AWWA or WEF bookstore, holding in your hands The Atlas of Water by Maggie Black and Jannet King, and looking at a map of the world that shows the status of integrated water resources

management; or at the map of the world that show cubic meters of water per person per year used for food production; or at the map showing percentage of population by country, with access to improved sources of drinking water; or, most frighteningly of all, a map showing the percentage of renewable water resources originating from outside the countries, which identifies areas where increasing competition and conflict are or will arise over exploitation of water.

Bookstores at ACE or WEFTEC might be the only place that you come face-to-face with Damned If We Don’t, a collection of ‘cool ideas’ essays for members of the water profession by ‘amazing people’ in that same profession. This collection is edited by Christopher Peacock, who has compiled Ideas for Accelerating Change Around Water” to help “cut across silos - real or imagined” and to make accessible, “effective levers for change.” Or, there is The End of Abundance – Economic Solutions to Water Scarcity by David Zetland, a book that is particularly timely as California faces its worst and most terrifying drought in more than a century.

Where else, I ask you, can you go somewhere that exclusively offers you access to the knowledge base of materials for your own profession, or a sit in a room with a couple of thousand other people who share that same passion, commitment, dedication, interest – that same love of water? AWWA and WEF are the answer!

We all know that we are living in a time of daunting personal and professional challenges – along with accelerating change, threat, and opportunity. Every precious waking life-minute that we

have has multiple calls upon it and the competition for resources of time, attention, energy, and money magnifies. If you are reading this article, chances are that you are already a member of WEF or AWWA. I am offering you a passionate – and I hope compelling – argument to swim against the current of disengagement and detachment. I’m suggesting that you join or remain a member of both, and, furthermore, that you choose to take full advantage of the exceptional value that comes with those memberships. If you’ve been a silent partner, paying your dues, ratchet that membership up one notch, and participate in a committee, offer a paper and teach – or co-teach – a class; serve as a room monitor at a conference; take minutes for the Committee. If you have made those kinds of vital contributions in the past, ratchet up another notch, and offer to chair a committee, or serve as vice chair, so you’ll be ready to step up next year. If you’re already a veteran of committee, School, Conference leadership – how about going one more rung up the ladder, and offering time to serve on the Board? Already done that? Think about a contribution on the national level – to AWWA or WEF?

You have to know that your gift – of belonging, of participation, of service, or leadership. Those things matter a lot. You will never have a more important opportunity to make a difference, or make your life matter, than in belonging and in giving to NC AWWA-WEA and thereby to AWWA and WEF. Swim past the end of the tank! Get out into the BIG BLUE! We want, need, value, appreciate – and love you for all that you do.

“My first water – the water I first fell in love with – and knew that I loved, was Zoo Lake, a very small lake in Johannesburg, South Africa. I first rode my bicycle there at the age of 11 – and often thereafter, without the knowledge or permission of parents, and used my pocket money to rent a wooden rowboat.”

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NC AWWA-WEA Board of Trustees 2015

CHAIR, Chris Belk, PEHazen & Sawyer, P.C.Phone: (919) [email protected]

CHAIR ELECT, Julie Hellmann, PEHeyward IncorporatedPhone: (704) [email protected]

VICE CHAIR, Angela LeeCharlotte WaterPhone: (704) [email protected]

PAST CHAIR, Mike Osborne, PEBlack & VeatchPhone: (704) [email protected]

SECRETARY, George Simon, PECDM [email protected]

TREASURER, Ray Cox, PEHighfill Infrastructure EngineeringPhone: (910) [email protected]

WEF DELEGATE, Barry Gullet, PECharlotte WaterPhone: (704) [email protected]

WEF DELEGATE, Richard Tsang, PhD, PE, BCEECDM SmithPhone: (919) [email protected]

WEF DELEGATE-ELECT, TJ LynchCity of RaleighPhone: (919) [email protected]

AWWA DIRECTOR, Steve Shoaf, MSPHRetiredPhone: (828) [email protected]

TRUSTEE, Lori BrogdenSchnabel EngineeringPhone: (336) [email protected]

TRUSTEE, Jonathan Lapsley, PECDM SmithPhone: (704) [email protected]

AWWA DIRECTOR-ELECT, Brian TrippW.K. Dickson & Co., Inc.Phone: (704) [email protected]

TRUSTEE, Ron HargroveCity of Winston-SalemPhone: (336) [email protected]

TRUSTEE, Ryan LeBlanc, PEHDR Phone: (704) [email protected]

PROF WASTEWATER OPS REP, Greg MorganUnion CountyPhone: (704) [email protected]

PROF WATER OPS REP, Mark WesselCity of Raleigh – Resource Recovery DivisionPhone: (919) [email protected]

EXECUTIVE DIRECTOR, Lindsay Roberts, CAENC AWWA-WEAPhone: (919) [email protected]




















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Summary of the NC Section AWWA and NC WEA Board of Trustees MeetingMay 25, 2015 at Greensboro Coliseum, NC.

The following actions were taken:1. Strategic Governance:• The Board reviewed the Strategic

Planning and Governance Process.• The Board reviewed the goals

and initiatives for Membership Engagement. AWWA utility memberships have increased from 108 to 118. Individual membership numbers have predictably declined.

2. Action Items: Approved amendments to the Job Advertisement Policy.

a) Approved amendments to the Personnel Policy.

b) Approved amendments to the Endowment Policy.

c) Approved amendments to the Member Privacy Policy.

d) Approved creation of the Joint Water Reuse and Water Resources Committee, with Leila Goodwin to serve as Chair. This action re-establishes a stand-alone Residual Committee (to be re-named upon recommendation from the Committee), currently Chaired by Jean Creech.

e) Approved Membership Surveys to be conducted as presented.

f) Approved continuation of the Spring Conference for 2017 and 2018, with direction to seek a coastal location with access for heavy equipment for 2017 and return to Asheville in 2018.

g) Ratified the e-Vote, resolution for Steve Shoaf upon his retirement.

h) Ratified the e-Vote, authorizing sign-on to the WEF letter on WIFIA.

i) Ratified the e-Vote, approving WEF Award Nominations for Jonathan Lapsley and Ken Vogt.

j) Ratified the e-Vote, approving WEF Award Nomination for Dr. Francis de los Reyes.

k) Ratified the e-Vote, supporting application to hold the APWA Annual Conference in Charlotte, NC.

3. Chair’s Report:• Report on productive Joint Association

Steering Committee held at the Spring Conference, at which NC RWA, NCWOA and NC AWWA-WEA agreed to authorize the marketing task force

to develop recommendations for expenditure of the $15,000 allocation for marketing at a meeting to be hosted by NC AWWA-WEA in September.

• Report on a summit held by the California WEA on flushable wipes. Recommendation to have the Public Education and Regulatory Affairs Com-mittees look at what CWEA has done and develop something similar for NC.

4. Executive Director’s Report:• Thanks to Les Hall, the Endowment

Committee has a chart to track all tasks and timelines associated with the scholarship program. A list of all winners of all 2015 Scholarships was provided to the Board. Endowment Named Fund donors will be recognized at the Monday Awards Event at the Annual Conference.

• Water Otter has offered a package price for purchase of e-learning modules. There was discussion about availability of AWWA and/or WEF e-learning. It was

the consensus that the current workload for new educational offerings makes it impossible to undertake a renewed focus on e-learning at this time.

5. Consent Calendar - Approved:a) Minutes of the Board meeting of March

19, 2015 were approved.b) Treasurer’s Report for March and

April 2015, with total assets as of April 30, 2015 of $1,240,679.74 with $1,205,229.35 in checking/savings, of which $385,226.16 is endowment funds. The balance of unrestricted net assets (checking minus endowment) is $820,003.19. Water For People Balance sheet as of April 30, 2015 reflects total current assets of $5,014.88.

c) Committee Reports received through May 12, 2015.

6. Adjournment - next meeting Friday, July 17, 2015 at 9:30 am at Asheville Public Works.

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2015 Committee Chairs and Board Liaisons For more committee information visit individual committee web pages on www.ncsafewater.org.

Conferences Coordinating Council

COUNCIL CHAIR: Chuck Shue McKim & Creed (704) 841-2588 [email protected] AC Local Arrangements Adrianne Elder Duke Energy (919) 546-2138 [email protected] 2015 Spring Conference Christene Mitchell HDR (757) 222-1540 [email protected] Exhibits Wendy Banks Carolina Management Team (828) 712-5918 [email protected] Sponsorship Julie Taylor Arcadis (336) 292-2271 [email protected] Awards Committee Steve Shoaf City of Asheville (828) 259-5955 [email protected]

External Affairs Council

Nominating Jackie Jarrell Charlotte Water (704) 391-5181 [email protected]

Board Committees

COUNCIL CHAIR: Leslie Jones Brown and Caldwell (704) 373-7127 [email protected] Communication Sherri Moore City of Concord (704) 920-5415 [email protected] Constitution & Bylaws Chuck Willis Willis Engineers (704) 338-4668 [email protected] Endowment Carlos Norris Crowder (919) 367-2000 [email protected] Membership Jana Stewart Stantec (336) 392-4051 [email protected] Public Education Maggie Pierce Hazen and Sawyer (919) 863-9259 [email protected] Water For People Nick Dierkes Brown and Caldwell (704) 445-1491 [email protected] Young Professionals Derek Dussek HDR (919) 232-6603 [email protected]

Technical Program Council

COUNCIL CHAIR: Betsy Drake Town of Cary (919) 481-5093 [email protected] eLearning Task Force Betsy Drake Town of Cary (919) 481-5093 [email protected] SC Program Ben Kearns CFPUA (910) 398-4311 [email protected] AC Program Brian Tripp WK Dickson (704) 334-5348 [email protected] Seminars and Workshops Erika Bailey HDR (919) 785-1118 [email protected]

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Technical Program Council

Schools Council

SEMINARS AND WORKSHOPS COMMITTEES: Automation Greg Czerniejewski CDM Smith (919) 325-3500 [email protected] Collection & Distribution Systems Barbara Moranta CDM Smith (919) 325-3500 [email protected] Industrial Katie Jones Dewberry (919) 424-3723 [email protected] Resource Recovery and Reuse Co-Committee Chairs Jean Creech Charlotte Water (704) 336-3588 [email protected] Marla Dalton City of Raleigh (919) 996-3700 [email protected] Risk Management Barry Parsons City of Greensboro (336) 373-7643 [email protected] Regulatory Affairs Jaime Robinson CH2M Hill (704) 543-3279 [email protected] Sustainability Jacob Vandenbosch McKim & Creed (910) 343-1048 [email protected] Utility Management Co-Committee Chairs Joe Stowe (704) 575-0762 [email protected] Jackie Jarrell Charlotte Water (704) 391-5181 [email protected] Water Resources Leila Goodwin Town of Cary (919) 462-3846 [email protected]

COUNCIL CHAIR: Steve Drew City of Greensboro (336) 373-7893 [email protected] Wastewater Operators Schools Billy Allen Charlotte Water (704) 553-2124 x222 [email protected] (704) 400-7322 Collection & Distribution Schools Troy Perkins Greenville Utilities (252) 551-3301 [email protected] Commission Wastewater Laboratory Analyst Schools Debra Collins City of Wilson (252) 399-2494 [email protected] Plant Operations & Maintenance Schools Dell Harney City of Greensboro (336) 373-7900 [email protected] Professional Wastewater Operators Michael Wiseman City of Asheboro (336) 672-0892 [email protected] Wastewater Board of Education & Examiners John Gibson City of Raleigh (919) 996-3684 [email protected] Water Board of Education & Examiners Ivan Thomas City of Asheville (828) 259-5957 [email protected]






















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Committee Spotlights

Schools CouncilWith a few exceptions, the State requires individuals to attend an approved school before being able to sit for a certification exam. NC AWWA-WEA has several committees devoted to organizing these schools. The role of the Schools Council Chair is to enhance communication among school chairs, the board, and the many committees that carry out the bulk of the NC AWWA-WEA’s work.

The Schools Council facilitates the sharing and cross pollination of instructors between schools, when skills and talents match up. This past year has seen the forming of new bridges, with committees helping committees and schools helping schools fill gaps in instructor needs and create new talent pools.

At the same time, the Schools Council has provided ongoing support and resources for NC AWWA-WEA’s new professional development and skills training initiatives – the Academy for Water Professional Development (Academy) and the Institute trainings – by vetting, supplying and supporting instructors for these new programs.

Collection and Distribution SchoolsWith the assistance of the NC AWWA-WEA staff, the committee schedules classes and instructors to present topics approved by the NC Water Treatment Facility Operators Certification Board and the NC Water Pollution Control System Operators Certification Commission. The schools are meant to help students successfully take their exams.

Encompassing 20 to 25 members, mainly from municipalities, but also engineering firms and private vendors, the committee meets both in-person and via conference calls in January/February for a

planning meeting and two to three weeks prior to each of the three schools.

The schedule and locations changed this past year, with a Coastal School in Morehead City in March, Western School in Morganton in July, and Eastern School in Durham in September. Plans for the coming year include getting the word out about the changes and bringing new members onto the committee. With close to half of members coming to the end of their term, the committee hopes to recruit people with a passion for enhancing operator knowledge and passing on their experience to future generations.

Plant Operations and MaintenanceThe committee has a three-fold mission: 1) providing educational opportunities for treatment plant personnel in existing and emerging O&M technologies and practices; 2) encouraging cooperation among other NC AWWA-WEA committees and with other organizations; and 3) facilitating exchange of information regarding treatment plant O&M, innovative solutions and greater understanding of plant processes and equipment.

With 112 people on its membership roll, the Plant Operations and Maintenance Committee (POMC) holds an annual six face-to-face meetings in a central part of the state, usually Raleigh or Greensboro. As members come from every part of the state, teleconferencing is always an option.

A POMC subcommittee planned and facilitated the Operations & Maintenance track (offering 0.5 to 2 CEUs) for the Spring Conference, that was held in Wilmington this year. The average attendance at the presentations was 32. POMC also conducts formal training at schools for the Maintenance Technologist (MT) Certification program, with the much-anticipated

level IV rolled out in 2015, thanks to the implementation of a new team model encompassing school coordinators, class coordinators, room monitors, instructors, test proctors and NC AWWA-WEA staff.

Overall attendance at the MT schools was down because an ice storm forced the cancellation of the Eastern School in Raleigh. Nonetheless, to date, 808 Maintenance Technologist Certifications have been awarded, with requirement for certification increasingly showing up on job postings across the state.

Plans for the coming year include broadening outreach to the O&M community via a subcommittee working with the Academy of Water Professional Development Taskforce. The committee is also revamping its organizational structure to streamline meetings and facilitate small groups turning out high volumes of quality work. With several members taking on new leadership positions, POMC will also be looking for new members.

Professional Wastewater OperatorsCommittee chair Michael Wiseman says he became involved with the Professional Wastewater Operators Committee (PWOC), eight years ago, because he was interested in seeing other plants/equipment and talking to different people to see how they might be handling problems similar to those he was facing at his facility.

Monthly meetings include a training session, which provides a two-hour CEU toward operator license renewal. Locations rotate to different sections of the state, with meetings held in Chapel Hill, Hillsborough, Charlotte, Asheville, Concord, Clarkton and Willington in 2015.

Fostering the sharing of ideas and ex-periences among members, the committee consists of 20 to 30 wastewater operators,




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Committee Spotlights

maintenance technicians, laboratory personnel, equipment and chemical salesman, and indus-trial pretreatment operators per section. Annual awards are given to each section for the best O&M Facility. The facility hopes to keep growing its membership and networking opportunities.

Wastewater Boardof Education and Examiners

The purpose of the Wastewater Board of Operators and Examiners (WWBOEE) is to provide assistance to the North Carolina Water Pollution Control System Operator’s Certification Commission (NCWPCSOCC). Meeting every third Tuesday of every other month, in-person and by conference call, the board is tasked with reviewing the Needs to Know (NTK) for the Collections, Biological Wastewater and the Physical/Chemical Schools. At the conclusion of each review, the board presents its recommendations to the NCWPCSOCC.

Currently, the WWBOEE consists of 13 members and three non-voting advisors: the chair of the NCWPCSOCC (or designate) and the chairs of the NC AWWA-WEA Collection/Distribution, and the Wastewater Treatment Operators School Committee. Membership is comprised of three members holding valid Physical/Chemical Grade II, and two holding Biological Grade IV, and two with Collection Grade IV certification. There are two positions for systems with populations less than 10,000 and one for ‘other applicable certifications.’

Work continues on the NTK, with the Collection NTK about 95% complete, the Biological about 20%, and the Physical/Chemical about 70%. The board hopes to complete its review and deliver its recommendations in the near future.

Currently there are three vacancies to fill: one for Physical/Chemical, one in the Other Certification category, and one representative from a system serving a population of 10,000 or less. Any individual who would like to serve on the WWBOEE should contact John Gibson at [email protected] or Jeff Mahagan at [email protected].

Wastewater Laboratory Analyst Schools

Currently in the process of being reformed and restructured, the Wastewater Laboratory Analyst Schools Committee is charged with

promoting communication between the edu-cation of the state’s wastewater laboratory analysts. Although, the Western Lab Analyst Group, and the two Lab-net Groups – Pied-mont and Lab-Net East – are not formally connected with the committee or each other in any way; Chair Debra Collins would like to see those ties strengthened in the future.

Chair Collins is looking to members who have expressed a desire to serve on the committee to assist in furthering these goals.

Already, members of each of the three groups attend each other’s meetings to share information. Although there are no separate Lab Analyst Schools, lab classes are offered at the NCWOA Operators’ Schools and at events such as the Pretreatment Consortium and the NC AWWA-WEA annual conference. Nonetheless, many lab analysts would like to see the state move toward a system of more structured lab analyst training and exam preparation.

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Committee SpotlightsOver the past year, Chair Collins and a

few other NC AWWA-WEA members helped administer the lab analyst exam, organize the annual statewide Lab Technology Day seminar and select the recipient of the Wastewater Laboratory Analyst Excellence Award. In conjunction with the NC Department of Natural Resources, Chair Collins also organized a meeting to inform lab analysts of the new rule changes.

Chair Collins notes that although the committee is focused on lab analysts working in wastewater, another potential reform could be expanding the mandate to those working with water. Collins looks forward to welcoming new members to actively participate in reshaping the committee.

Wastewater Operators SchoolsStarted in 1950 as the Annual Wastewater School Committee, the Wastewater Treatment Operators Schools Committee has a long history of providing education and training for North Carolina’s wastewater industry professionals. Over the years, it has built on its original mandate of preparing a curriculum for the school, and now organizes

and runs two five-day schools (one in Raleigh and one in Morganton) for biological wastewater treatment plant operators Grades I to IV, and one four-day school for physical/chemical wastewater treatment plant operators Grades I and II.

The committee also provides input on curriculum to the state’s Technical Assistance and Certification Unit (TACU) and the Water Pollution Control System Operators Certification Commission, established in 1969 when the State passed a law requiring all operators to be certified.

Water Board of Educationand Examiners

The Water Board of Education and Examiners (WBOEE) provides assistance to the North Carolina Water Treatment Facility Operators Certification Board (NCWTFOCB) in the development and administration of Cross Connection and Distribution Certification Exams. Members assist in administration of the exams as well as the pre- and post-exam review. In addition, the Board is responsible for conducting the voluntary certification exam for Meter Technicians.

Ongoing goals include reviewing and improving the Exam Bank of questions for the NCWTFOCB as necessary, as well as attending and auditing classes and distribution schools to ensure educational commitments are satisfactory. Every quarter, board members review all the questions on which the applicant pool grades less than 50%. This continuous review process ensures that all students are treated fairly and are being tested with relevant material. In the coming year, the board plans to continue systematically reviewing exams and procedures, while also working with the Certification Board on a math formula sheet that will assist with the testing of operators in the future.

WBOEE meets quarterly, both in person and by conference call, with ad-hoc meetings as necessary. Members come from the water/wastewater industry, with specializations in distribution, cross-connection and metering. Although up to 15 people can sit on the board, there are currently only 10 members. Anyone interested in joining can contact the chair, Ivan Thomas at [email protected].

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Member Portrait

Portrait of

Steve Hilderhoff:A Passion for Engineering

From a young age, Hilderhoff knew he wanted to be an engineer. He comes from a large family where, out of 35

first cousins, six have chosen engineering as a career. “I remember in ninth grade, we had an assignment about careers and so I decided to write about being a civil engineer,” says Hilderhoff whose report was partly influenced by an older cousin who graduated with a civil engineering degree.

After high school, he began his undergraduate years at the University of Pittsburgh in his hometown. It was there that he first developed an interest in water and hydraulics.

In his junior year of college, he decided to send out resumes to nearly every engineering firm in the phone book. Subsequently, he was offered a summer internship by CET Engineering, a water/wastewater consulting firm in Harrisburg, Pennsylvania, where his family had relocated. “After my internship I had an even greater interest in learning more about the water and wastewater side of the business,” he recalls.

Upon graduating he accepted a fulltime job with CET. He then began planning and designing water and wastewater facilities, developing sanitary sewer system studies and using trenchless technology to rehabilitate buried utilities. During those years, he was greatly influenced by his coworkers, who readily shared their knowledge, “They taught me a lot about being an engineer and how to keep things simple,” he recalls.

Eventually, Hilderoff’s growing interest in water and wastewater led him to pursue a Master’s Degree in Environmental Pollution Control from Pennsylvania State University. Working by day, he attended classes at night. “There were many times that my friends were going out, but I was going

home to write papers,” laughs Hilderhoff, adding that, as it turned out, one of his bosses at CET taught several classes at Penn State. “I had to put extra time into those classes for sure.”

His tenacity paid off. In 2001, the young consulting engineer was offered a position at Stearns and Wheler in its Raleigh, North Carolina office, where he continued his focus on designing and rehabilitating wastewater collection systems. In the late 2000’s, GHD merged with Stearns & Wheler and then coincidentally merged with CET shortly thereafter.

Throughout his career, Hilderhoff has been involved in several very large projects, including providing sewer systems to communities where there were none before. This encompassed developing facilities from the early stages of planning right through to construction. Other projects revolved around upgrading older sewers, pumping stations and treatment plants. He admits that seeing a project go from concept to reality is immensely gratifying. “What we do turns into a tangible product,” says the consulting engineer who has now spent more than two-dozen-years in the business, “and it affects a lot of people.”

Since relocating to Raleigh, Hilderhoff has been actively involved with the NC AWWA-WEA. He explains that it was a natural continuation of his volunteer work with the Pennsylvania Water Environment Association (PWEA). “Back in the mid-1990s I was encouraged to join by one of my managers when I was still in Harrisburg,” he recalls. “Since I was not sure how to participate, my manager had signed me up for the Membership Committee and as the ‘new guy’ I became responsible for assembling the biennial membership directory.”

Within his first year of arriving in North Carolina, Hilderhoff joined the Collection and Distribution School Committee. For the next eight years, he taught at two schools a year. Then John McLaughlin in GHD’s Charlotte office suggested he join the Communications Committee. “I enjoy the fact that we produce such a valuable product,” says Hilderhoff, pointing to his work with NC Currents. He also enjoys the camaraderie that accompanies putting together the magazine and all its technical content. It is something he plans to keep doing in the coming years.

“We are constantly thinking of ways to improve the magazine and find interesting, relevant themes for each issue, sometimes a year or more in advance,” he notes, adding that this sharing of knowledge is one of the many benefits of an association membership. “Being part of these associations has really helped me to meet people and understand the engineering community wherever I’ve worked.”

Along with his ongoing volunteer work, he is also looking forward to his new position at Dewberry and contributing to its success across North Carolina. After 24 years with GHD and the companies it eventually absorbed, Hilderhoff joined Dewberry in April 2015. He is excited about the opportunity and ready for a new challenge.

No matter what the project Hilderhoff’s level of commitment and passion for his work shine through. Always striving to make a positive difference both personally and professionally, he enjoys collaborating with his colleagues and teaching younger engineers. “I really enjoy seeing things get constructed,” explains Hilderhoff, who joined Dewberry as an Associate in April, “but it’s also about being able to work as a team to deliver a project that solves the issues our clients have and make a difference in the lives of those they serve.”


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Member Portrait

Portrait of Aaron BrowerOn the Forefront of Municipal Water and Wastewater

One of the things Aaron Brower enjoys the most about his work, as assistant public utilities director

at the City of Raleigh, is the opportunity to be involved in cutting-edge projects. Recently the city launched an energy recovery project that will see the Neuse River Resource Recovery Facility switching to anaerobic digestion in order to generate methane gas to produce electricity or to fuel the city’s bus fleet. To maximize yields, the plant will be incorporating a unique thermal hydrolysis process just before the anaerobic digestion. (See article on p. 87). “The process basically involves ‘pressure cooking’ the sludge to improve gas production while reducing the amount of volatile solids,” explains Brower, adding that, to date, DC Water has had the only active thermal hydrolysis plant in the US. “We’re on the leading edge. This is the most interesting project I’ve worked on since starting with the City.”

Yet, he points out, it is not the only City of Raleigh project breaking new ground. For the past three years, he has also been involved with the implementation of a Horizontal Asset Management Program to proactively replace water and sewer pipelines. “That program has allowed us to add a fee to our fee structure in order to fund water and sewer main replacements,” explains Brower. “We are trying to predict when they are going to fail instead of waiting until they do. It costs a whole lot

more in emergency procedures than if you proactively replace your assets. I think that being proactive is very important to the entire water and wastewater industry.”

It is an approach that he has had plenty of opportunity to put into practice during his 12 years with the City. Before being promoted to the position of assistant director, Brower was the head of Capital Improvements Management, a division that continues to report to him in his new role. His focus is now more on the engineering side, including development plan reviews. “I get to be involved with all the construction that goes on with both our private development partners and our city improvement projects,” he notes, adding that he also manages the City’s Engineering Inspections Division and the GIS Program.

The City currently has more than 230 active water and sewer projects either in design or construction. Brower’s group also manages the City’s sewer capacity studies, and the master plans for the wastewater treatment plant (WWTP), the water treatment plant (WTP), water systems, and biosolids. “It’s a challenge,” he admits. “It makes the days go by really fast.”

By working on the master plans, the group he manages is also responsible for generating a list of recommended projects that are presented to City Council for budgeting approval. This means that Brower is involved from the genesis of

each project, through planning, budgeting, preliminary engineering, design, bidding and construction, to the day the project is put into service. “That’s one of the things I enjoy the most about my work,” he says. “In a lot of industries you get to see one little piece of a project, whereas in my role at the City, I get to see project from conception to completion.”

In fact, Brower is exactly where he wants to be. After completing a BS in Construction Engineering and Management at NC State in 2000, he was hired by a large construction firm specializing in WTPs and WWTPs. Quickly realizing that the work was not a good fit, the young graduate accepted an interim position with the North Carolina Department of Transportation (NC DOT) working on the 85-70 Interchange in Durham. Once again, it did not take long for Brower to know that this was not where he wanted to be. Then in July 2003, he joined the City of Raleigh as a project engineer. He had found his niche.

“Municipalities are a good middle ground,” he explains. “They allow you to be efficient and nimble while providing some structure. At the same time, working for the City has allowed me to serve the public, which I enjoy.” The City owns and operates water and wastewater utilities that serve a little more than half a million people, living in Raleigh as well as six surrounding towns.

“Municipalities are a good middle ground. They allow you to be efficient and nimble while providing some structure. At the same time, working for the City has allowed me to serve the public, which I enjoy.”



In Raleigh itself, there is a lot of infill development, which comes with its own set of challenges. “One of the things I have always liked about this industry is the problem-solving,” says Brower. “This environment has allowed me to exercise that.” One of the innovative solutions in which the young engineer has been involved is the creation of a new urban pipe replacement reimbursement policy for developers.

He explains that when a developer wants to build an infill apartment building on a site originally occupied by a much smaller structure, upgrading sewer capacity is sometimes a necessity. “The new policy allows us to partner with our development community to replace pipes that are at or near capacity,” he elaborates. “It enables us to collect a fair share from ratepayers and reimburse developers to ensure they are also paying a fair share.”

The program has made it easier for the City to convince developers to upgrade capacity not only to meet their own needs but those of surrounding infrastructure as well. In fact, the initiative has worked so well that John Sorrell and Robert Massengill will be presenting a paper on this policy at the NC AWWA-WEA Annual Conference this fall (see Conference Schedule on p. 46)

In the past, Brower has also presented papers at the conference. He has been a regular at the annual event since becoming a member of the NC AWWA-WEA when he joined the City of Raleigh. He has attended several Spring Conferences as well. “That’s a great clearinghouse to share ideas and learn about what others are doing that may be a bit different,” he says, adding that the networking opportunities at the conferences are equally important. “Developing those relationship allows you to share more information outside the conferences themselves. It is easier to call someone with a question when you have met them face-to-face than when you have just looked them up on the Internet and are cold calling them.”

These exchanges have been invaluable to Brower in growing his career. Some day

he hopes to transition to the role of director, either at the City of Raleigh or elsewhere. In the more distant future, he can see himself retiring from government and then moving into more of a consulting role.

In the meantime, he hopes to become involved with the Water Environment Research Foundation (WERF). “I have a real interest in researching,” he explains. “There are so many great new products

being developed, but it requires research to determine if those products are good for utilities as a whole.”

Brower notes that whether he is engaged in research or problem solving, he is fortunate to have a wonderful support network that includes consultants, contractors and his colleagues at the City of Raleigh. “I get to work with some great people,” he says, “each and every day.”

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Spotlight ON OUR Supporters

Featuring the following companies:

28 Gavel & Dorn Engineering, PLLC

29 Dewberry

30 Highfill Infrastructure Engineering, PC

Thank you to all the advertisers who support the North Carolina AWWA-WEA through this magazine.


Please visit our web page for more information or give us a call to see how we can be of service (704-483-2054).

Gavel & Dorn Engineering, PLLC (G&D) is a Charlotte-based engineering consulting firm that provides design and construction services to local governments to address their stormwater collection, sanitary sewer, and potable water distribution system problems. We also have extensive experience in water and sewer rehabilitation, Sewer System Evaluation Survey (SSES), and flow metering, but our construction experience is unique in North Carolina.

Since the firm was founded in 2003 by Kirk Gavel, PE, our core service area has been on providing construction administration and observation services related to municipal infrastructure, primarily water and sewer. The firm has provided construction inspection services on projects ranging from 6-inch water mains to 96-inch diameter storm sewers, and from treatment plants to pumping stations.

We have successfully completed over $250 million of construction projects for a variety of clients including municipalities, universities, industrial facilities and other engineering consulting firms. All of our inspectors are well-trained, experienced, and fully equipped. We have the capability to ramp up or down field staff in response to contractor schedules.

G&D has also developed extensive in-house construction materials testing capabilities in response to the needs of our construction observation services clients. As a result, since 2005, we have the capability to provide the construction materials testing services required on most public works projects.

Albemarle Water Transmission Main Project – Cities of Concord, Kannapolis, and Albemarle

G&D is providing construction administration, observation, and engineering services during construction for this $21.0 million project, which consists of approximately 20 miles of 30- and 24-inch ductile iron pipe (DIP) water transmission main, two pump stations, and a 1 MG water storage tank. The project is a joint effort by the cities of Concord, Kannapolis and Albemarle, with Concord acting as the Owner’s Agent. It runs from Concord to Richfield and most of the pipeline is in the right-of-way of NC Hwy 49. The pipeline traverses both rural and suburban areas and includes restoration of driveways, fences, landscaping and relocation of other utilities. The project is split into two construction contracts; Contract 1 is for the pump stations and storage tank, and Contract 2 is for the pipeline. The pipeline includes 31 stream crossings, 16 bores under state-maintained roads and coordination with an ongoing road-widening project.

As a result, this project requires extensive coordination with the North Carolina Department of Transportation (NCDOT). A project web portal was set up to initiate, track, and trace submittals, RFIs, and correspondence. This shared workspace ensured all project teams had the latest and best information to perform their work. G&D had multiple inspectors on the job reporting directly to Mr. Gavel. Construction is nearly complete and G&D is currently providing engineering services during pump station start up.

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Dewberry is a leading, market-facing firm with a proven history of providing professional services to a wide variety of public- and private-sector clients. Recognized for combining unsurpassed commitment to client service with deep subject matter expertise, Dewberry is dedicated to solving clients’ most complex challenges and transforming their communities. Established in 1956, the firm is headquartered in Fairfax, Virginia, with more than 40 locations and 2,000 professionals nationwide. Dewberry has been operating in North Carolina for more than 30 years with offices in Raleigh and Charlotte. In 2015, the firm was ranked in the top 50 of Engineering News-Record’s Top 500 Design Firms.

Dewberry’s North Carolina experience includes the planning and design of water distribution, wastewater collection, municipal water and wastewater treatment, and industrial wastewater treatment systems. The firm’s more than 130 local staff offer a complete suite of services to solve client needs, including site/civil, structural, electrical, instrumentation and controls, stormwater, HVAC, and plumbing/fire protection engineering services. Dewberry has been involved in hundreds of North Carolina projects, from utility design to storm drainage studies and technologically groundbreaking infrastructure solutions.

Pumping Solution for Duke EnergyDuke Energy was challenged by chronically low levels of water in Belews Lake, North Carolina, where it has operated the Belews Creek Steam Station since 1974. The company was using expensive temporary pumping measures to transfer water from the Dan River to Belews Lake to keep the 2.24-GW plant in operation, but required a more feasible, permanent system for water transfer. With so much at stake, Dewberry used solid science, state-of-the-art technology, and a thoughtful engineering approach that works together to create a cost-effective, long-term solution. They engineered an approach that includes a permanent raw water intake system (up to 65 MGD) with two velocity caps, fish screening, and four vertical turbine pumps. The result is a

successful solution, with environmental protections in place and healthy North Carolina waterways that will continue to be enjoyed for fishing and boating.

Updating Storm Drainage in a Flood-Prone Area As part of the Sunnyvale-Chandworth Storm Drainage Improvement project, we surveyed a 670+-acre watershed, including topographic mapping, cross section surveys, and inventory of existing utilities using aerial mapping. Dewberry was able to submit all deliverables ahead of schedule, developing a strong relationship with the client in the process. The storm drainage system study, including analysis, design, cost-benefit analysis, and cost estimates, provided the city with information needed to improve the existing and inadequate storm drainage system.

Improving InfrastructureWith locations all over the nation, Dewberry is able to research regions individually and combine data to develop the best plans locally as well as nationwide. The firm works with clients to navigate current and emerging standards, as well as potential impacts on their water and wastewater infrastructure. The firm continues to make strides in improving North Carolina’s infrastructure and transforming local communities with our superior knowledge. Dewberry’s long standing water and waste water expertise enables it to infuse past experience and lessons learned into every project.

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When I look at the employees of Highfill Infrastructure Engineering (HIGHFILL), one thing is very clear to me – their commitment to service does not stop when the clock hits five.

Many of our staff members are not only active leaders in industry organizations like NC AWWA-WEA, WEASC, and PENC, but they also coach sports teams, mentor at-risk or special needs youth, volunteer at historic sites, participate in animal rescue events, and take part in mission trips with their churches or other community groups.

I am not sure what calls us to these kinds of activities, but I do know that it shapes the kind of people we are and how we approach the work that we do every day. Whether it is in our DNA or learned over time, the will to serve others becomes a defining characteristic.

As an engineering consulting firm, HIGHFILL wants to be the best in the business. Selective hiring, in terms of setting a high bar for employee proficiency, education, and interpersonal skills, is an important first step.

The greatest business success, however, is achieved with employees who are committed to the core principles of the business. Those core principles must, first of all, be worthy of gaining their commitment. The most dedicated employees are those who understand that they are an integral part of something larger than themselves, who work in a culture where they feel secure to be themselves, and who feel empowered to be their best.

HIGHFILL employees are encouraged to seek out every opportunity they can to be of service to others. We believe this encouragement is a large part of the reason we have experienced extremely low turnover. We want our employees to be able to follow their passions integrally with their daily work.

Engineering is our Profession.Service is our Passion.

Why Service MattersBy Allison Andrews, Communications Coordinator, HIGHFILL [email protected]

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“It is important to the success of our firm that our employees

are service-oriented. This foundation of genuine care for others comes through in their service to our clients and helps us to

build strong, lasting relationships.”Tyler Highfill, PE, Founder and President



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Service matters because, above all, people matter. For a company whose business is primarily in service to the public, it is critical that our employees have a penchant for serving. HIGHFILL’s service focus is reflected in our business mantra, which is an adaptation of the Engineer’s Creed:

We place service before profit, the profession before personal gain, and the public welfare above all other considerations.

“I’ve stayed with HIGHFILL for nearly 10 years because I appreciate the focus

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engineer based on my personal effort.” Paul Shivers, PE, Project Manager




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What is The Academy for Water Professional Development (The Academy)? The Academy is a specialized training and certication program for current or prospective water industry employees seeking to advance their careers.

Why should I enroll? The Academy has been built for professionals who look at the water industry not just as a job, but as a career. NC AWWA-WEA consulted with industry leaders to determine the most highly desired skillsets for upper level employees. Our courses have been designed to incorporate that feedback and position participants for supervisory and upper level management positions. Any individual who is serious about advancing his or her career and is willing to invest time into training is encouraged to enroll.

How is The Academy structured? The courses for each discipline in our program have been organized into four certication levels: Apprentice, Journeyman 1, Journeyman 2, and Master. Certication will require completion of all courses within each level (or equivalent) and passing a comprehensive exam.

Can I receive credit for prior training or years in the workforce? Credit for previous training courses and/or work experience will be determined on a case-by-case basis. Participants will be given an opportunity to submit these items for review upon registration.

Is this training required by the State? No. Most training will result in voluntary certicates.

Will I receive a degree or college credit? The Academy is not currently affiliated with any college or outside degree program. All certications will be from NC AWWA-WEA only.

Where will the training be held? Training sessions will be held at venues throughout North Carolina and online.

What disciplines are currently available for certification? We are currently offering courses in Collection System Technician and Distribution System Technician programs; however, more disciplines are currently under development.

How long will it take me to complete each level of a discipline? The timeframe for completing each level will vary depending on the number of hours the participant can devote to the training.

Will CEUs be required to maintain certification? Yes. To maintain the value and credibility of the certicates, continuing education will be necessary.

How can I become an instructor or volunteer to help with The Academy? Volunteer opportunities with The Academy are numerous and include behind the scenes administrative work, course and curriculum development, marketing, and instruction. Individuals who are interested in volunteering or becoming an instructor should contact Catrice Jones at [email protected].

The Academy for Water Professional Development is a new initiative of NC AWWA-WEA to ll an industry training gap and advance the careers of participants. The program includes multi-year technical and leadership development training courses, which have been developed based on input from industry leaders across North Carolina.

Frequently Asked Questions

Registration for Academy Classes The rst classes were held in 2015 at the Western and Eastern Collection & Distribution Schools. More classes will be scheduled in 2016. Courses will be advertised on www.ncsafewater.org, in eNews email newsletters, and in 2016 Training Catalogs. You may also contact the NC AWWA-WEA to nd out when the next courses will be offered and to ask questions.




Plant Spotlight: City of Wilson’s Hominy Creek Water Reclamation Facility – Making Positive Changes for the Future

GeneralBack in 1958, the City of Wilson started up the new Hominy Creek Wastewater Treatment Plant that served the majority of the customers located within the city limits. By 1974, this plant’s name changed to the City of Wilson Wastewater Management Facility and now the plant has been named the Hominy Creek Water Reclamation Facility (HCWRF). This wastewater treatment plant’s boast is not multiple name changes, but its continual implementation of improvements that encompass some very advanced technologies and innovative water treatment processes.

The HCWRF has a design flow of 14 mgd and treats both domestic and industrial wastes for a population of nearly 50,000 people within the City of Wilson. Currently, the facility operates with an average daily flow of 9.8 mgd and an average maximum daily flow of 14.7 mgd. The peak flow is 30.0 mgd and the projected annual operating cost is $4.5 million.

As well, the City of Wilson utilizes reclaimed water from HCWRF to irrigate a turf farm located at this facility. The City of Wilson’s Parks and Recreation Department manages and maintains the turf farm’s varying turf species and harvests the mature turf for city projects. One such project was the Parks and Recreation Department’s recently constructed soccer fields located at the city’s soccer complex. The turf for the two new fields was harvested and transplanted from this City-managed turf farm.

Treatment ProcessesThe basic treatment processes at the Hominy Creek Water Reclamation Facility (HCWRF) includes the liquid train consisting of primary, secondary, and tertiary treatment processes, followed by effluent pumping to the reclaimed water distribution system. Solids removed from the liquid train are directed to four on-site anaerobic digesters for further treatment, and then the solids are removed from the

facility site to either a compost facility or farmland via land application. 1. Preliminary & Primary Treatment:

Within the preliminary treatment portion of the HCWRF, about 70% of raw wastewater enters the preliminary treatment influent structure via an influent pump station with four dry pit submersible pumps that are equipped with variable frequency drives and a mechanical bar screen that includes a serpentine conveyor to collect screenings. The remaining 30% of influent wastewater combines with the flow from the influent pump station and then flows through two mechanical bar screens with a combination screenings conveyor and press, and then travels through two stirred vortex grit collectors and two corresponding grit classifiers. After this, the influent wastewater flows through three primary clarifiers for further treatment, while the equalized dewatered side-stream combines with the influent prior to entering the primary clarifiers.

Prior to entering into the primary treatment portion of the HCWRF, effluent flow from the preliminary treatment area is measured using an ultrasonic flow meter. It should be noted that there are two primary sludge pump stations located in the preliminary treatment area that transport sludge from the primary clarifiers to the four anaerobic digesters; primary sludge is not thickened (note: only wastewater activated sludge (WAS) or WAS from secondary clarifiers is thickened).

2. Secondary Treatment: Primary treatment effluent (PTE) travels through a five-stage secondary treatment

Operations Center and Laboratory

Aerial photo of Hominy Creek WRF



process after combining with effluent flow from a biological phosphorous removal (BPR) tank that operates anaerobically and receives a portion of flow from recycled activated sludge (RAS). The combined primary and BPR effluent flows then feed into the seven biological nutrient removal (BNR) tanks. These seven BNR tanks operate in parallel with one another, and each have an anoxic zone, an aerobic zone (including fine bubble, ceramic disc-type air diffusers), a second anoxic zone, and a post aeration zone. In addition, nitrogen recycle (NRCY) pumps transport water from the end of the aeration zone to the first anoxic zone. After this, a MicroC 3000™ solution is fed into the second anoxic zone as a food source for the denitrification process. MicroC 3000™ is primarily a methanol product that also contains a blend of other alcohols such as ethanol, propanol, and butanol. Three Hoffman centrifugal blowers are included in the secondary treatment process, and two APG Neuros turbo blowers are currently being installed to further enhance the treatment process. Finally, the effluent wastewater flow coming from the BNR tanks then travels into one of the five secondary clarifiers, where secondary sludge is then transported through three RAS pump stations to holding tanks at the solids handling facility prior to being thickened.

3. Tertiary Treatment: From this point in the process, clarifier effluent flows over V-notch weirs on effluent troughs within the clarifiers and move forward to the tertiary treatment area. The first process

of tertiary treatment is filtration and five deep-bed effluent filters are utilized at the facility; there is also an option to feed food source for denitrification. At this particular point in the process, filtered effluent flows from the deep-bed-filters to disinfection, which is achieved by chlorination of the plant effluent using liquid sodium hypochlorite coming from two bulk storage tanks.

From this point, the plant effluent is directed towards a splitter box that sends the effluent into two different areas. Part of the plant effluent travels through the post aeration/dechlorination process and the other part is directed to the reclaimed water distribution system. A general description of both processes is as follows:A. Post Aeration/Dechlorination:

Treated wastewater to be discharged into a body of water must meet permit limits for dissolved oxygen levels (DO), and this post aeration facility ensures that the DO concentration is met. Coarse bubble static tube diffusers with centrifugal blowers are located in the post aeration area. These diffusers impart air from the atmosphere into the water prior to the plant effluent being dechlorinated. The dechlorination process is achieved by feeding liquid sodium bisulfite from the bulk storage tank into the chlorinated plant effluent coming from the post aeration area. Finally, the plant effluent coming from the dechlorination process is sent through a Parshall Flume with an ultrasonic flow meter, and then

travels through an approximate 1.5-mile discharge piping system to the river.

B. Reclaimed Water: The other portion of the plant effluent flows downstream from the above referenced splitter box directly to the reclaim water pump station that consists of two pumps. Just after the plant effluent flows through these two reclaim water pumps, the water is treated again with liquid sodium hypochlorite prior to being sent to the reclaimed water distribution system that contains both 0.25 MG and 1.00 MG elevated storage tanks.

4. Solids Processing/Handling: Solids are completely processed onsite at the Hominy Creek Water Reclamation Facility (WWWRF) through anaerobic digestion. Prior to being sent to the four existing anaerobic digesters, solids collected from the bottom of the secondary clarifiers are pumped to a waste activated sludge (WAS) thickening area, which includes two Ashbrook 3.0-meter gravity belt thickeners and a liquid polymer feed system. Thickened solids are then transported to the four existing anaerobic digester (with floating covers) referenced above, where four sludge tube-in-tube heat exchangers are fed from two dual fuel fire tube boilers. Digester gas is used primarily to fuel these boilers, with natural gas as a backup fuel.

Dewatering and disposal of solids starts with the anaerobic digested solids being sent to the two existing

Covered sludge facility One of two belt presses in the sludge dewatering building




Ashbrook 2.0-meter belt filter presses, which are directly tied into a liquid polymer feed facility that enhances the overall dewatering of the solids. Once the solids are properly dewatered (note: the final cake is approximately 20% solids), they are then transported to a 32,000 square foot covered storage pad for further drying. The final transport and disposal of solids (mainly Class B) is completed through an existing contract with Granville Farms, where the majority of the Class B solids are transported to a company called Eastern Compost and the remaining portion is land applied to local farmland.

Other Information1. Awards: 2014 NC AWWA-WEA

Wastewater Treatment Plant Operation and Maintenance Excellence Award – East Region

2. Personnel: Although the HCWRF is highly automated, the plant requires the attention of a highly trained operations staff. One plant manager, an administrative assistant, and the water reclamation compliance coordinator are employed at the HCWRF for general administration, regulatory compliance, and pretreatment program management. In addition, the facility has a total of 22 operation and maintenance employees, and six laboratory employees. As far as personnel development programs with the City of Wilson, specialized training is available to the employees in order to attain various certifications in their respective areas. If employees receive all available certifications in their respective areas,

management encourages them to branch into other areas of the HCWRF as much as possible. In addition, there are HCWRF staff certified at various levels in all of the following areas: Biological Wastewater Operation, Land Application, Spray Irrigation, Physical/Chemical, Collection System, WWTP Maintenance Technology, Pretreatment, and WW Lab Analyst.

3. Plant Expansions: The HCWRF influent pump station was recently updated in 2012 with new pumps, variable frequency drives (VFDs), controls, and a mechanical bar screen. In addition, a second power line feed was also added to the influent pump station so HCWRF plant staff could continue to operate at least half of the pumps if one of the power feeds was lost.

The HCWRF is currently in the process of installing two APG-Neuros Turbo blowers to enhance the secondary treatment system. The primary goal of the blower installation is to provide redundant power systems to the main air supply system in the event of loss of critical components. Current blowers operate on a 2300 volt supply, and any loss of transformer or other critical gear could result in catastrophic loss of critical treatment operations for an extended time while equipment is repaired, located, installed, etc. In addition, these new blowers will have their own separate power feed running at 480 volts and could be run on a single easily located generator. Other benefits of these blowers are better energy efficiency and better control of air to the plant aeration zones.

4. Automation: Supervisory Control and Data Acquisition (SCADA) at the HCWRF monitors the majority of processes throughout the plant and 20 off site pump stations. The existing air control system is monitored by seven Luminescent Dissolved Oxygen (LDO) probes, 14 Oxidation Reduction Potential (ORP) probes, nitrate and ammonia probes, and two Solitax turbidity probes; all probes use either Hach® SC100 or SC200 controllers. In addition, the air control system is automated with several actuator valves controlling airflow, and many other processes can be controlled through the HCWRF SCADA system.

5. Safety and Health Program: HCWRF staff have a plant-wide safety meeting once a month to provide required OSHA safety training, and they also discuss special topics of concern related to wastewater treatment plant operations. They also discuss any recent safety incidents and provide additional training to try to prevent repeat incidents from occurring.

6. Unique or Difficult Problem Faced/Solved: The HCWRF discharges into Contentnea Creek, which is a tributary to the Neuse River. The Neuse River has additional regulations due to its designation as nutrient sensitive water. The current permit for the HCWRF includes annual loading limits for Total Nitrogen (TN) and the City of Wilson is a member of the Lower Neuse Basin Association (LNBA) and the Neuse River Compliance Association (NRCA). HCWRF staff strive to get their TN discharge as low as possible, but it is a

Aeration basins The headworks, which includes two mechanical bar screens and a vortex grit system



task they have struggled with for many years and they continue to look for ways to decrease the TN discharge.

Around 1992, the existing trickling filter was converted to a BPR tank. And just prior to 2000, the existing three aeration basins were modified to provide denitrification, and three additional BNR tanks were added for a total of six BNR basins. Tertiary filters were also added during this upgrade. In 2005, a seventh aeration tank was added and an upgrade of the dewatering facilities was completed. The addition of the dewatering facility created a new challenge in regards to dealing with the filtrate side-stream from the new belt filter presses. Since the HCWRF sludge is anaerobically digested, the BFP filtrate is highly concentrated with ammonia. The current HCWRF processes efficiently remove the ammonia, but that is converted to nitrate, which processes must also remove to keep the TN loading down.

Over many years, the HCWRF staff has taken several different actions to minimize the impact from their side-stream and improve nitrogen removal. HCWRF staff struggled with achieving sufficient WAS removal from the process because the side-stream from dewatering operations increased their TN discharge values higher than they wanted. The HCWRF originally had a single line feeding methanol from the bulk chemical storage to the BNR basins, where HCWRF staff then tried to split it evenly to seven individual basins. Various City of Wilson personnel laid additional methanol distribution lines in the system; therefore, they now have lines for BNR basin pairs. This particular addition of distribution lines has helped better distribute methanol to the individual basins and helped improve the HCWRF’s TN discharge values.

HCWRF staff also switched from operating belt filter presses during low flow conditions overnight to higher flow/food conditions during the day, and as a result, there was some more improvement. At that point, HCWRF staff later determined they had excessive oxygen in the tertiary filters for methanol feed to work effectively, so the feed to the filters was shut off and the feed to the second anoxic zones was increased in the basins, resulting in even more improvement.

A long-term goal is to minimize oxygen introduction into the filters. After concluding that insufficient food was reaching the initial anoxic zone, HCWRF staff started shutting off one or two of their three primary clarifiers to increase food into the basins and noticed less nitrogen being released. When the new influent pumps were upgraded with VFDs, HCWRF staff noticed a small decrease as the flow was steadily routed through the plant. In addition, the pure methanol was switched to MicroC 3000™ (mostly methanol with a mixture of other alcohols) and there was another small decrease in nitrogen, however, there was a major improvement in phosphorus removal. In conclusion, the HCWRF has achieved a steady decrease in TN discharge since 2007 with an annual average TN discharge of 5.46 mg/l, and their lowest value of 1.95 mg/l in 2013. However, a little ground was lost in 2014 with an annual average TN discharge of 2.32 mg/l.

In ongoing efforts to improve nitrogen removal, two existing pre-aeration basins that had been out of service for several years were recently modified. The City of Wilson’s Water Resources Infrastructure Division staff modified these basins to equalization (EQ) tanks for the

filtrate side-stream so this side-stream could accumulate in the EQ tank during dewatering operations and slowly feed into the system, thus, not slugging the process with the highly ammonia concentrated filtrate water. In addition, the new turbo blowers that are being installed should give HCWRF staff additional air control to optimize dissolved oxygen (DO) in the basins. The next project is to add additional LDO probes and automatic actuator valves to better control the front and back aeration zones in the BNR basins. This upgrade should assist with maintaining higher levels of DO in the front zone to complete BOD and ammonia removal, and then maintain less air in the back zone and the nitrogen recycle water entering the front anoxic zone. In addition to all of the above actions, HCWRF staff strives each day to optimize DO levels to enhance their nitrogen removal.

Contact Information for more on the Hominy Creek Water Reclamation Facility:Jimmy Pridgen, Plant Manager, City of Wilson – Utilities DepartmentAddress: 3100 Stantonsburg Road, Wilson, NC 27893Email: [email protected] Office Phone: (252) 399-2491

Staff at the Hominy Creek WRF




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NC AWWA-WEA

95th AnnualConference

November 15-18, 2015Raleigh Convention Center | Raleigh, NC

Conference Preview 41-44

Sponsorship 45

Conference Schedule 46

Technical Program 48-49

Exhibitor List 51-55

Leadership

hazenandsawyer.com

If you’re trusted to protect public health and the environment, we can help.

1 Regular visual checks are performed to monitor signs of algae growth or buildup.

2 Monitor for algae favoring conditions(nutrients, water temperature, stratification).

Cyanobacteria can bloom very quickly.

3 Collect samples for cyanobacteria identification and enumeration at observed algae-impacted locations.

5Monitor raw water for evidence of algae or algae-related water quality impacts.

4Use sensory analysis and analytical tools for taste and odor and algal toxins detection.

7

Conventional treatment optionsPowdered activated carbon (PAC), potassium permanganate, and chlorine have been shown effective under certain conditions to oxidize and remove algal toxins.

In-reservoir algae treatment Chemical and physical techniques can control algae, but may result in release of T&O or cyanotoxin compounds.

LOW MEDIUM HIGH VERY HIGH

• Non-favorable algae growth conditions

• Regular visualinspection for algae

• Monitoring of conditions

• Weekly algae Intake sample during growth season

• Bi-weekly to weekly visual inspections with cyanobacteria identification at observed impacted locations

• Weekly review of raw water quality• Weekly odor sensory analysis of raw water• Daily algae intake sample

• Favorable growth conditions• Potential presence of cyanobacteria• Potential for algae-related treatment

challenges such as pH, DO swings, low level taste and odor (T&O) or toxins in raw

• Evidence of cyanobacteria observed = move to High Alert Level

• Prepare for control of observed algae/cyanobacteria via targeted control methods

• Prepare for in-plant treatment of T&O or cyanotoxins

• Confirmed cyanobacteria growth (2000 - 5000 cells/mL)

• Evidence of algae raw water quality impacts• Detection of algae-related odors in raw

water

• Vigilant visual inspections and sampling at confirmed bloom location(s)

• Daily review of raw water quality• Daily odor sensory analysis of raw and treated

water• Weekly testing for T&O compounds and/or

cyanotoxins in raw and treated water

• Confirmed cyanobacteria growth • Likely algae-related treatment challenges• Potential for algae-related toxins and T&O

• Evidence of odor or T&O/cyanotoxins in raw or treated water = move to Very High Alert level

• Treat confirmed bloom location and consider whole-reservoir treatment

• Prepare for in-plant treatment for T&O or cyanotoxins on standby or precautionary implementation

• Cyanobacteria bloom conditions (>10,000 - >50,000 cells/mL)

• Detection of algae related T&O and/or toxins in raw and/or treated water

• Confirmed cyanobacteria blooms• Confirmed presence of T&O or toxins in

raw water

SOURCES:

International Guidance Manual for the Management of Toxic Cyanobacteria, Global Water Research Coalition Water Quality Research Australia, 2009; "EPA Health Advisories for Cyanotoxins” Presented at the May 11, 2015 Cyanotoxins in Drinking Water Stakeholder Meeting

Conditions

Monitoring Actions

• Evidence of algae in reservoir or raw water = move to Medium Alert Level

ResponseActions

• Favorable algae growth conditions

• Evidence of cyano-bacteria in sampling

Step-up Triggers

Cyanobacteria under the microscope.

Each summer, municipalities are faced with algae-related issues in their raw water supplies. This wall poster can be used as a guide to develop preventative algae monitoring and treatment for your facility, as well as minimize the impact of an algae event.

9

• Chemical algae control in-reservoir often results in T&O or cyanotoxin release into water column, so analysis of compounds should continue even after bloom controlled

• Alert public as appropriate and advise about treatment strategies in place

• If not already done, treat bloom or whole reservoir

• Implement in-plant treatment of T&O or cyanotoxins

• Continue daily visual inspection until algae eliminated

• Daily review of raw water quality • 2 daily odor sensory analyses of raw and

treated water• Daily testing for T&O compounds and/or

cyanotoxins in raw and treated water

8

ALERT LEVEL

6

Water RegulationsThe EPA has released draft “10-day Health Advisory Levels” for total microcystin and cylindrospermopsin as low as 0.3ppb and 0.7ppb for children younger than school age.

10Proactively prepare a public notification plan in case it is ever needed.

Alert & Action Plan

Algae

Advanced treatment optionsOzone, granular activated carbon (GAC) filtration, and UV advanced oxidation provide effective barriers to algal toxins. These high energy and cost technologies represent significant investments for addressing intermittent water quality issues.

hazenandsawyer.com

Well before EPA issued recent health advisory guidance on impacts of algal toxins, we were already developing tools to help you assess the risks and chart appropriate monitoring and treatment approaches.

Matters

download this at

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Mark your calendars and plan to join us for NC AWWA-WEA’s 95th Annual Conference, November 15-18, 2015 in the Capital City of Raleigh, NC!

The 95th Annual Conference is expected to draw over 1,200 water and wastewater professionals along with over 150 exhibitors from across North Carolina to the Raleigh Convention Center. Attendees can look forward to three days full of educational and recreational activities as well as time to enjoy the sights and sounds of downtown Raleigh.

Many exciting activities are planned. In addition to the events outlined below, informative technical sessions will be running throughout the conference with papers presented in five concurrent tracks divided by topic: water, wastewater, collection & distribution, special topics, policy & management, and new this year, a young professional’s track on Monday afternoon.

The exhibit hall will open Sunday afternoon and remain open during conference hours until 1:20pm on Tuesday. All attendees are encouraged to visit as many booths as possible and take advantage of this opportunity to learn about new water and wastewater trends and technologies. To help attendees balance their time between technical sessions and the exhibit hall, the exhibit hall will host several events including lunches, socials, and the popular Pipe Tapping, Operations Challenge, and Best Tasting Water competitions.

The conference continues in the tradition of recognizing industry professionals and organizations for their achievements. New this year, to draw more attention to our deserving award winners, many awards traditionally presented at the Sunday evening Welcome Reception and the Monday morning Opening Session have been moved to a special ceremony on Monday afternoon. Please plan to join us to congratulate your fellow professionals. Induction of the new class of Select Society of Sanitary Sludge Shovelers (5S) will take place at the Sunday Welcome Reception, and other awards will be given at the Tuesday Gavel Gala and Banquet.

2015 Annual Conference PreviewVisit http://www.ncsafewater.org/?page=AnnualConf to get more information and the latest updates.

You may choose to register online or download and print the registration form.

VISITING NATIONAL OFFICERSJohn DonahueAmerican Water Works Association, Immediate Past-President (2015-2016)John is the general manager of the North Park, Illinois Public Water District, a groundwater system with 33,000 customers. He continues to hold water and wastewater operator licenses and advocates for operator involvement.

Jenny HartfelderWater Environment Federation, Board of TrusteesJenny is currently a vice president with MWH and serves as the Rocky Mountain client service leader in Denver, Colorado. In this role, she provides strategic planning and leadership for the business development activities for the water sector in the Rocky Mountain Region, covering Colorado, New Mexico, North Dakota, Utah, and Wyoming. She also serves as a project manager and design engineer on numerous water and wastewater projects, including master plans, preliminary and detailed designs, and engineering services during construction.

PRE-CONFERENCE WORKSHOPEmerging ThreatsSunday, November 15, 3:00pm - 4:30pmThis workshop will discuss climate change and other emerging security and preparedness threats and challenges facing water and wastewater systems, including the ever-growing cyber security threat, illegal dumping into wastewater systems, workplace violence, and other topics. The workshop will involve brief presentations by the panelists of about 10 minutes each, followed by a panel and audience discussion.

OPENING SESSIONClimate and Water Management in NC: Possibilities and ChallengesSankar Arumugam, Ph.D.Monday, November 16, 7:45am – 9:00amDr. Sankar Arumugam is an associate professor in the Department of Civil,

Construction, and Environmental Engineering at NCSU. He is also a university faculty scholar (2013-2018). He is primarily associated with the Water Resources and Environmental Engineering (WREE) and Computing and Systems groups within the Department of Civil Engineering.

Dr. Arumugam’s primary research interest is at the interface of climate and water management, focusing on large-scale hydroclimatology. His current research sponsors include the National Science Foundation, National Oceanic and Atmospheric Administration and NC Water Resources Research Institute.

CLOSING FORUMAn Overview of Challenges and Trends in Preparedness for Water and Wastewater SystemsWednesday, November 18, 9:00am - 11:00amThe Wednesday forum will build on the Sunday pre-conference session and the opening keynote presentation with a panel discussion of emerging threats to water and wastewater systems, such as cyber security threats, dumping into wastewater systems, pandemic, active shooters, and other threats, along with a discussion of potential preparedness and mitigation measures, such as emergency response planning and WARN. The forum will involve brief remarks by the panelists, followed by a panel and audience discussion.

FACILITY TOURDempsey E. Benton Water Treatment PlantTuesday, November 17, 12:45pm - 4:00pmThe Dempsey E. Benton Water Treatment Plant (WTP) is Raleigh’s newest water treatment plant, having opened in May 2010. The plant collects from the Swift Creek Watershed, including both Lake Benson and Lake Wheeler, and has a maximum capacity of 20 MGD. The WTP utilizes raw ozone, ferric sulfate as the primary coagulant, Superpulsator clarifiers, up-flow biologically active GAC


NC AWWA-WEA

95th Annual ConferenceNovember 15-18, 2015 | Raleigh Convention Center | Raleigh, NC

NC AWWA-WEA


http://www.ncsafewater.org/?page=AnnualConf



filters, gravity dual media filters, ultraviolet (UV) disinfection, a 5-MG finished water storage reservoir and pump station, backwash storage tank, dissolved air flotation facility (DAF) to treat backwash waste, recycle pump station with UV disinfection and standby generator facilities. The plant holds a LEED Silver Certification, received an Area Wide Optimization Program (AWOP) Award in 2013 and 2014, an AWWA Partnership for Safe Water Director’s Award in 2014, and was the first water treatment plant in the state of North Carolina to be granted 3 log Cryptosporidium and Giardia credit for ultraviolet disinfection.

STUDENT ACTIVITIESSeveral activities are planned for Monday to get students involved in the Annual Conference and to introduce them to NC AWWA-WEA. To make attendance on a student budget possible, free Monday-only registration is available for students. For more information on Annual Conference student activities, and to register, please contact Elisa Arevalo at (919) 863-1020 or [email protected]

Student Poster Contest – Students involved in research related to environmental/water resources topics are encouraged to present their work in the Student Poster Contest. Monetary prizes will be awarded for first, second, and third place posters. The first place winner will also be awarded the opportunity to present his or her poster at the National AWWA ACE conference in 2016!

Student Guide Program – Interested students can be paired with an established professional to answer questions, show them around the conference, and introduce them to others in the industry.

Student Lunch – Make connections with other students and industry professionals during a reserved lunch on Monday, November 16, 2015 from 12:05pm to 1:45pm. This is a great time to discuss the conference, career paths, and NC AWWA-WEA membership.

Young Professional Technical Session – This new technical session track on Monday afternoon is designed to provide students and young professionals with an overview of a broad range of topics within the water and wastewater industry and to give students and young professionals the opportunity to present in a comfortable atmosphere.

PIPE TAPPING CONTESTMonday, November 16The Pipe Tapping Contest is a competition of skill in which teams compete for the best time in opening a cement-lined, ductile iron pipe and installing a tap. Pipe tapping teams shall consist of a maximum of four persons including three workers and one coach. Winners from the Pipe Tapping Contest will be eligible to compete in the 2016 National AWWA contest at ACE.

OPERATIONS CHALLENGEMonday, November 16 and Tuesday, November 17In the Operations Challenge events, four-person teams, along with their coaches, compete in events that challenge their skills in various wastewater related activities. The winner is determined by a weighted point system. At the National WEFTEC level, there are five events in the Operations Challenge: Collection System Event, Laboratory Event, Process Control Event, Pump Maintenance Event, and the Safety Event. The 2015 North Carolina Operations Challenge Competition will include all five of these events.

The Collections System Event simulates the repair of a damaged 8-inch PVC sewer pipe, and the connection of a 4-inch sewer lateral, while the 8-inch pipe remains in service. The event also simulates the installation and programming of an automated Hach Composite Sampler, to collect a composite sample of the ‘flow’ in the 8-inch pipe.

The Maintenance Event simulates the failure of one pump in a duplex lift station, and the full servicing of a trailer-mounted Godwin Dri-Prime NC80 Pump. Once the pump service is complete, the Godwin Pump is temporarily connected to the lift station and programmed for automatic operation with the use of a level probe.

The Laboratory Event simulates analyzing a series of process control samples for pH, alkalinity, and ammonia using Orion instruments. Once the samples have been analyzed, the teams must perform process control calculations to determine if sufficient alkalinity is in the treatment system to sustain nitrification.

The Safety Event simulates a simultaneous confined space rescue of an unconscious co-worker and a heart attack on one of the co-workers attempting the rescue. The confined space rescue must continue while 911 is contacted and CPR is performed on the heart attack victim. This event uses a Reid Rapide Gantry System to facilitate the confined space rescue.

The Process Control Event is a timed event giving the teams an opportunity to demonstrate their accumulated knowledge and skill in the areas of laboratory procedures, collections system operation, maintenance, safety, and troubleshooting through a written test including multiple choice questions and short math questions.

BEST TASTING WATER CONTESTAll utilities are invited to submit a sample and see how the taste of their drinking water measures up to the taste of others in the state. A panel of volunteer judges will rank individual samples and results will be combined to establish the overall ranking. Awards will be given for first, second, and third place. In order to participate, samples must be turned in at the conference registration desk by 5:00pm on Sunday, November 15.

SILENT AUCTIONSTwo silent auctions will take place during the Annual Conference: one benefitting the NC Safewater Endowment and the other benefitting NC Water For People. Both silent auctions will be located close to each other and will have similar hours. When placing a bid, please take notice of the specific auction and that auction’s timeline and contacts.

The NC Safewater Endowment Fund Committee Silent Auction raises money for the endowment fund. In previous years, this fun and popular event has added significant contributions to the Endowment Fund. Additions to the fund


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W C

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increase the number of scholarships to be given in the future and the dollar amount of the scholarships.

Available auction items and their bid sheets will be on display Sunday through Tuesday near the committee tables or the conference registration desk. Items will also be displayed at the Chair’s Dessert Reception on Monday evening. Bidding will remain open until 1:20pm on Tuesday, with the highest bid winning. Winners may pay for and pick up their item at the Gavel Gala on Tuesday from 5:30pm - 7:00pm.

Your Call to Action! The Endowment Committee is currently asking individuals and organizations to donate items for the Silent Auction fundraiser. Past Silent Auctions have successfully offered jewelry, sterling silver, figurines, and other collectibles. Members have also donated top-quality artwork, woodwork, pottery, and art glass, as well as services, vacation spots, and dining experiences. Cash donations are also acceptable, and a representative from the Endowment Committee will shop for you and will provide

a receipt for your tax-deductible donation.To donate items for the Silent Auction,

contact Linnell Stanhope, Crowder Construction Company at (919) 614-2527. Your interest and participation in this event are greatly appreciated. More information will follow online at www.ncsafewater.org and in NC AWWA-WEA eNews emails.

The Water For People Committee Silent Auction raises funds for Water For People projects. Visit the Water For People table all day on Monday and until noon on Tuesday to bid on items. Winners will be called to pick up their items at the Water For People table between 12:00pm - 1:20pm on Tuesday. All proceeds from this auction will go to Water For People.

Hanging Rights to a Piece of History - Would you like to display an incredible piece of history in your office? During the Water For People silent auction we are offering hanging rights to a unique 400-year-old framed print that shows a hand pump and well system designed by the renowned 17th century scientist Athanasius Kircher. Kircher was a contemporary of Descartes and Galileo and

helped Bernini with his famous fountain in the Piazza Navona in Rome. The item itself was printed first on a Gutenberg type press, and then to place the graphic, a wood block engraving was used for the illustration. It has been dealer verified as being printed circa 1676 and was donated by John Carman.

This one-of-a-kind historical artifact is being offered on a lending basis. The winning bidder will own the rights to display the piece for one year and then pass it on to the winning bidder the following year.

GOLF TOURNAMENTThe golf tournament will be held Sunday morning at the Lonnie Poole Golf Course on the campus of NC State University. The course was designed by Arnold Palmer and utilizes Raleigh’s reuse water for irrigation. Cost to participate in the golf tournament is $95 per person and includes entry fee, range balls, tee prize, breakfast, lunch, and prizes for first place, long drive and closest to the hole prizes. Other prizes will be given by random drawing. Sign up as a team or as an individual and you will be placed on a team.


NC AWWA-WEA



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http://www.rkk.com


CONFERENCES CORPORATE SPONSORS

GOLF TOURNAMENT

OPERATIONS CHALLENGE

STUDENT LUNCH

PIPE TAPPING CONTEST

GAVEL GALA & AWARDS BANQUET

WELCOME RECEPTION

Kennedy Valve

SponsorshipSeveral conference events offer an opportunity to show your support of NC AWWA-WEA while promoting your organization. Each event offers unique benefits and exposure to different groups within our conference attendees and you are encouraged to select the sponsorship combination that best fulfills your needs. All of these sponsors will be recognized with a sign at the event, and acknowledged during the event opening and/or closing. Sponsors listed below are current as of July 15, 2015.

There may still be time to add your company’s name to this list. Contact the NC AWWA-WEA office for details.

THANK YOU TO THE SPONSORS OF THE 2015 ANNUAL CONFERENCE!

Sponsorship is available for this event.

The Operations Challenge is also accepting equipment donations. Refer to www.ncsafewater.org

for a list of needs.


NC AWWA-WEA





SUNDAY, NOVEMBER 158:30am Golf Tournament**12:00pm - 6:00pm Committee Display Tables3:00pm - 5:00pm Board of Trustees Meeting2:00pm - 6:00pm Conference Registration Desk Open3:00pm - 4:30pm Pre-Conference Workshop: Emerging Threats*4:00pm - 7:00pm Exhibit Hall Open5:00pm - 7:00pm Welcome Reception**

MONDAY, NOVEMBER 166:30am - 5:30pm Conference Registration Desk Open7:00am - 7:00pm Committee Display Tables7:45am - 9:00am Opening Session: Climate and Water

Management in NC - Possibilities and Challenges*

8:00am - 5:00pm Student Poster Contest9:00am - 7:00pm Exhibit Hall Open9:15am - 5:10pm Technical Sessions9:15am - 4:00pm Operations Challenge: Collection System, Pump

Maintenance, Laboratory, and Safety Events**11:30am - 1:20pm Association Buffet Lunch12:05pm - 1:45pm Student Lunch**11:30am Pipe Tapping Contest**1:20pm - 5:10pm Young Professional Session*3:00pm - 3:30pm Afternoon Break

Conference Schedule4:00pm - 5:00pm Awards Ceremony5:15pm - 7:00pm Social Hour in Exhibit Hall8:45pm - 11:00pm Chair’s Dessert Reception & NC Safewater

Endowment Silent Auction**

TUESDAY, NOVEMBER 177:30am - 1:00pm Committee Display Tables7:30am - 5:30pm Conference Registration Desk Open7:30am - 1:20pm Exhibit Hall Open8:00am - 5:00pm Technical Sessions*9:00am - 3:00pm Operations Challenge: Process Control Event**9:40am - 10:15am Morning Break11:30am Best Tasting Water Contest11:30am - 1:20pm Association Buffet Lunch12:45pm - 4:00pm Facility Tour: Dempsey Benton Water

Treatment Plant*2:15pm - 2:45pm Afternoon Break5:30pm - 7:00pm Gavel Gala**7:00pm - 10:00pm Awards Banquet**

WEDNESDAY, NOVEMBER 188:00am - 11:30am Conference Registration Desk Open9:00am - 11:00am Closing Forum: An Overview of Challenges

and Trends in Preparedness for Water and Wastewater Systems*

*These events offer contact hours. **These events are available for sponsorship.

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SUNDAY - NOV 15, 20153:00 pm - 4:30 pm

MONDAY - NOV 16, 20157:45 am - 9:00 am OPENING SESSION - Dr. Sankar Arumugam, NC State University

TIME WATER WASTEWATER COLLECTION & DISTRIBUTION SPECIAL TOPICS POLICY & MANAGEMENT YP

9:15 am - 9:45 am Anion Exchange for Drinking Water TreatmentWilliam Dowbiggin, CDM Smith

Troubleshooting Problematic Chlorine Mixing Dynamics with CFD AnalysisNick Landes, Freese & Nichols

Fast Track Project Implementation for the Idlewild BPS Piping ImprovementsKyle Massey, Black & Veatch

Waste To Energy Plant Saves MillionsGlenn Parrish, PHG Energy

Operational Optimization - It’s Not Just for Utility PlantsDavid Saunders, HDR

9:50 am - 10:20 am Algae, Algal Toxins, and Treatment: Cures for Bad Habits!Scott Alpert, Hazen & Sawyer

Nitrification Design Factors to Meet Low Ammonia LimitsDavid Kinnear, HDR

Challenges in Designing Large Diameter HDPE Water Mains for Charlotte’s City Lynx Gold Line Streetcar Project: Long Life for New Pipe in Areas of High Electric CurrentGeorge Galambos, AECOM

Implementing an Adaptive Capital Improvement PlanKaty Weidner, Black & Veatch

Charlotte Water and PCBS - The Saga ContinuesJonathan Lapsley, CDM Smith

10:25 am - 10:55 am UV and Ozone-Mediated Advanced Oxidation and Role in Treatment of Emerging Contaminants in North CarolinaBryan Townsend, Black & Veatch

Road Map Toward Sustainable Nutrient Management and the Future of Mainstream DeammonificationBeverly Stinson, AECOM

Optimizing Operations of Finished Water Pumps and Protecting the Distribution System with Transient ModelingCrystal Broadbent, Hazen & Sawyer

Building a Townwide Water Resources Communications FrameworkMarie Cefalo, Town of Cary

Reimbursing Developers for Main Replacement: Raleigh’s New PolicyJohn Sorrell, City of Raleigh

11:00 am - 11:30 am ZLD Process Uses Ultrafiltration to Achieve 99.3% RO RecoveryPhil Locke, McKim & Creed

Study, Design, Construction, & Start-Up of NC’s First Sidestream TreatmentKatya Bilyk, Hazen & Sawyer

Tools for Designing Inverted SiphonsStephanie Kellogg, McKim & Creed

The McDowell Creek WWTP Research Forest and Timber Stand: Active Management and Use of a Previously Unused Land ParcelWilliam Rice, City of Charlotte

2013 EJCDC Construction Document Series - Changes and What They Mean for YouMatthew Skidmore, Black & Veatch

11:35 am - 12:05 am Up and Running: The Country’s Largest VTSH Pump Station Takes ChargeBryan Jann, Freese & Nichols

Are You Getting Your Money’s Worth? Dividends of Performance Based Polymer ProcumentKeller Schnier, CDM Smith

Exploring Regional Water System Interconnections in the TriangleJeff Cruickshank, Hazen & Sawyer

12:10 pm - 12:40 pm Considerations and Operational Challenges in Choosing Membrane Filtration for a WTP UpgradeKeith Garbrick, LaBella Associates

Relative Performance of Grit Removal DevicesMatthew Bodwell, Hydro

12:45pm - 1:15 pm Corpus Christi Variable Desalination Demonstration ProjectTrooper Smith, Freese & Nichols

Effect of Organic and TSS Loadings on Performance of Simultaneous Nitrification and Aerobic Carbon Oxidation in the Signal Stage Fixed Film BioreactorsJohn He, Veolia

1:20 pm - 1:50 pm NSF/ANSI 419: A New National Standard for Membrane FiltrationDavid Purkiss, NSF International

The Three Stages of a Co-Digestion Program - Steps on the Path to SuccessRobert Wimmer, Black & Veatch

Solving Significant Surge and Water Hammer Issues in a Large Wastewater Lift Station at Fort Bragg, North CarolinaRandy Foulke, AECOM

Success with a Basic Vulnerability Assessment and Emergency Response Plan Update Project in GreensboroSteve Drew, City of Greensboro

Employee Development Through a Skill Based Pay Approach Jeff Therman, Brown & Caldwell

How Rapid Growth in Fort Mill Necessitated Evaluation of New Treatment TechnologiesDavid Wankmuller, Hazen & Sawyer

1:55 pm - 2:25 pm Advanced Technologies for Attaining and Maintaining DBP ComplianceAllison Reinert, Hazen & Sawyer

Comparison of MBBR and Suspended Growth Biological Nitrogen Removal Performance for Upgrades at the Hopewill Regional Wastewater Treatment FacilityErika Bailey, HDR

Risk Based Design Storm SelectionSteven Cook, Black & Veatch

Contractor Prequalification: Is It Right for Your ProjectPeter Schuler, Brown & Caldwell

The AWWA J100-What It Is, Why It Is Being Updated and Why It Matters to YouJohn McLaughlin, GHD

Introduction to Pumps in the Water and Wastewater IndustryRoss Stroud, CDM Smith

2:30 pm - 3:00 pm The Use of Chlorine Dioxide to Reduce TOC at Davidson Water, Inc. WTPJoseph McGougan, MDB Counsulting Engineers

Innovative Integrated Fixed-Film Activated Sludge Oxidation Ditch Conversion for Total Nitrogen ControlRenzun Zhao, Entex

Smart Modeling for Water Distribution System Energy OptimizationBryan Lisk, Hazen & Sawyer

Protecting Clemson University Athletic Facilities - A Clemson/US Army Corps of Engineers PartnershipScott Synder, AECOM

Is There Any Relief? A Case Study in Pressure OptimizationTory Wagoner, Cavanaugh

Career Growth Through Construction AdministrationTony Martin, Black & Veatch

3:00 pm - 3:30 pm BREAK IN EXHIBIT HALL

3:30 pm - 4:00 pm An Innovative Raw Water Intake for the Town of BooneRyan Hager, WK Dickson

Good at the First Drop: Start-up of the Western Wake Regional WRF Meets Summer Permit LimitsChris White, Hazen & Sawyer

Pump Station Design Considerations for a Simple Duplex Station Discharging into a Combined Regional Force MainRachel Rausch, Kimley Horn

Integrating Asset Management into Winston-Salem’s Wastewater System Master Plan CIPKevin Laptos, Black & Veatch

Getting and Keeping Your Governing Board on BoardEd Kerwin, OWASA

I Wear My Safety Glasses at Night: Maximizing Planning Tools to Reduce Utility Construction Costs and HeadachesBen Latino, McKim & Creed

4:05 pm - 4:35 pm Dissolved Air Flotation (DAF) for Backwash Waste Clarification at the Dempsey E. Benton Water Treatment PlantMike Hughes, City of Raleigh

Road Map to the Future: The Consolidation of Sewer Infrastructure in Rutherford County, NCBrian Tripp, WK Dickson

Where Are We Going to Put This Thing - 30” Gravity Sewer Through a Downtown Columbia NeighborhoodPhillip Dieckman, AECOM

Source Water Protection and the Detection of Chemical ContaminantsBen Wright, Hazen & Sawyer

South Fork Improvements Program - A Mid-Program ReportKent Lackey, Black & Veatch

The Early Years - Successfully Transitioning from College to the WorkforceEric Smith, CDM Smith

4:40 pm - 5:10 pm Phasing of Construction of a Major Water Plant ExpansionJerry Pierce, Brunswick County

Why Class A Does Not Always Make Cents: Cost Model to Drive Biosolids Planning DecisionsSebastian Smoot, GHD

City of Rockdale’s Elevated Storage Tank Breaks Tradition by NecessityCharles Kucherka, Freese & Nichols

Utilizing Construction Manager-at-Risk (CMAR) in Greensboro, NCMike Borchers, City of Greensboro

Watershed Protection-Land Trust Partnerships to Meet Your GoalsMary Brice, AECOM

Start Off on the Right Foot With Fine ScreeningColin Beck, Hazen & Sawyer

Technical Program

WEDNESDAY - NOV 15, 20159:00 am - 11:00 am

TUESDAY - NOV 17, 2015TIME WATER WASTEWATER COLLECTION & DISTRIBUTION SPECIAL TOPICS POLICY & MANAGEMENT

8:00 am - 8:30 am Evaluating the Viability of Potable Reuse OptionGary Revoir, Tetratech

Reclaimed Water Solution for Disposal Capacity - The Village of Bald Head IslandTony Boahn, McKim & Creed

Understanding Risk and Resilience to Better Manage Water TransmissionDavid Kerr, GHD

Time is Money, Use Yours WiselyRay Cox, Highfill

Case Studies in Leveraging the Triple-Botton-Line Framework of the Envision Rating System for Alternatives Analysis and Decision MakingEvan Bowles, Hazen & Sawyer

8:35 am - 9:05 am Technical and Cost Evaluation of Alternative Treatment Trains for Direct Potable Reuse - A Case StudyKatherine Bell, CDM Smith

Ammonia Based Aeration Control Reduces Energy Consumption by 15%John Rutledge, Hach

Condition Assessment Following the Collapse of a 36” Force MainMatthew Schulz, HDR

First Make a Business Case for Cyber SecurityDon Dickson, Phoenix Contact

Putting the Use Back in Reuse: Reclaiming Water and Nutrients to Support Sustainable, Local Agriculture SystemsBobby Tucker, TetraTech

9:10 am - 9:40 am Intro to Iron and Manganese Control for Small Water SystemsReid Campbell, AECOM

Construction of Ammonia Removal Upgrades for the First Broad River WWTP in Shelby, NCDavid Hux, City of Shelby

Navigating Uncharted Territory - OWASA’s Advanced Gravity Sewer Management ProgramAnna West, CDM Smith

Now That I Have the Data, How Can I Best Use and Maintain It? A Case StudyGreg Anderson, McKim & Creed

How to Create a Communication Plan for Better Capital Project DeliveryChris Brown, HDR

9:40 pm - 10:15 pm BREAK IN EXHIBIT HALL

10:15 am- 10:45 am Building a Robust Water Model to Evaluate Long-Term Water Supply Options for Union CountyKevin Mosteller, HDR

Biosolids Planning From an End Use PerspectiveNatalie Sierra, Brown & Caldwell

David and Goliath - The Story of How a Small Town is Overcoming the Major Challenge of Bringing Their Sewer System into ComplianceMichael Sloop, CDM Smith

Planning for Now and the Future - The Development of a PCS Master Plan for the NorthEast Ohio Regional Sewer DistrictTerry Draper, HDR

Benchmarking Water Loss Performance: The Death of Unaccounted for WaterWill Jernigan, Cavanaugh

10:50 am - 11:20 am Critical Planning and Design Elements for Converting a Rock Quarry to a Water Storage ReservoirPamela Kenel, Black & Veatch

Development of an Innovative Methodology for Hydraulic Residence Time Distribution Analysis - Virtual E-Curve MethodDon Lee, AECOM

Do It Yourself Water Main Pipe BurstingRussell Colbath, City of Monroe

One City’s Approach to Meeting Upcoming Incineration Regulations Through Expedited Collaboration DesignLaurissa Cubbage, Hazen & Sawyer

Even a Good Problem Needs a Solution: When Customers Want Too Much ReuseCorrie Bondar, Freese & Nichols

11:25 am - 11:55 am Leveraging the Latest Mobile and Cloud-Based GIS Technologies to Support Operations and Asset ManagementJayson Brennan, CDM Smith

Under the River and Through the Woods: Design and Construction of Two Large Diameter Horizontal Direction Drills for the City of Corpus ChristiAnne Carrel, Freese & Nichols

Bridging the GAP Between Utility Operations, Asset Management and Technology: A Process for Aligning Technology and Resources in Evolving UtilitiesJeremy Brashears, WK Dickson

12:00 pm - 12:30 pm Diversifying Your Source Water Portfolio for Resiliency in the Face of Emergency - the Case of West VirginiaVictor D’Amato, TetraTech

HCSA Maple Avenue Regional WWTP Expansion - Persevering to Get What You NeedScott Ehrhardt, Dewberry

12:35pm - 1:05 pm Preparing Your Water Supply FutureJonathan Williams, HDR

Ballasted High Rate Clarification for Load Reduction and Capacity Increase at Asheville, NC - A Pilot DemonstrationJohn Irwin, Evoqua

1:10 pm - 1:40 pm Sustainable Water SupplyDan Boone, Wooten

You Have Co-Digestion, Now What? WERF Research into the Operational/MPACB of Co-DigestionMatthew VanHorne, Hazen & Sawyer

Lessons Learned from Recent Challenging HDD InstallationsDave Kerr, PE, BCEE, GHD

If It’s Broke, Fix It! Acquisition of Timmonsville’s Utilities: Part IIPorter Rivers, AECOM

A Tale of Two Plants: How Combining WWTP and WTP Improvements in Reidsville is Setting the Stage for the FutureKevin Irby, CDM Smith

1:45 pm - 2:15 pm Effective Removal of Total Organic Carbon (TOC) Using MIEX Ion Exchange Treatment SolutionsJ. Michael Barnes, LaBella Associates

Thermal Hydrolysis as Pre-Digestion, Inner-Digestion or Post Digestion Process - Where Does It Fit Best?Richard Tsang, CDM Smith

Digital Innovation and Data Integration Key to Successful Managing Charlotte’s Sewer Rehab ProgramAaron Frazier, Frazier Engineering

Pushing the Limits of Constructability Pushes the Limits of Stakeholder InvolvementChip Smith, Woolpert

Winston-Salem Forsyth County City/County Utility Commission’s (CCUC’s) Strategic Asset Management ExperienceLinda McCoy, GHD

2:15 pm - 2:45 pm BREAK

2:45 pm - 3:15 pm Managing Risks in Water Reuse: Intersection of Policy and ScienceMary Sadler, Hazen & Sawyer

Thermal Hydrolysis Pretreatment (THP) Considerations for a 30 Dry Ton per Day WRF in Franklin, TNThomas Nangle, CDM Smith

Think Globally - Inspect Locally: Pressure PipeJames Perotti, Brown & Caldwell

Charting the Future of Water Reuse for the City of RaleighSheryl Smith, CDM Smith

CMOR Value Through CMAR CollaborationDavid Bennett, Freese & Nichols

3:20 pm - 3:50 pm Raw Water Pumping Station Improvements to AddressCary’s Long-Term Water Supply NeedsDerek Dussek, HDR

Planning for the Future - MSD’s Facility Plan Update Peter Weed, MSD

City of Raleigh Transmission and Raw Water Main Condition Assessment Effort - Planning, More Planning and ExectutionBrent Johnson, CDM Smith

Lessons Learned from Security and Preparedness Projects at Various Water and Wastewater SystemsJack Moyer, AECOM

Managing Change While Improving Asset Management PerformanceWayne Francisco, GHD

3:55 pm - 4:25 pm Off Stream Drought Storage Benefits to Catawba RiverScott Thompson, Black & Veatch

Starting from Scratch - Commissioning the First Thermal Hydrolysis Fed Digesters in North AmericaPeter Loomis, CDM Smith

Condition Assessment vs Monitoring the Pro’s and Con’sCliff Jones, Syrinix

Beware of the Golden Goose, Working with Cell Antenna Installations on Elevated WatertanksJames Michel, Fayetteville PWC

Interesting Findings in the In-House Development of a Detailed Emergency Response Plan, Including Detailed Hazard-Specific Response Flow ChartTim Woody, Raleigh

4:30 pm - 5:00 pm Effectiveness of Tank Aeration for Stage 2 DBP ComplianceDavid Briley, Hazen & Sawyer

Implementing Thermal Hydrolysis to Expand Solids Handling Capacity at the HRSD Atlantic Treatment PlantStephanie Spalding, HDR

Keys to Sewer Rehabilitiation SuccessEddie Sasser, Highfill Infrastructure

Equipment Selection and Data Delivery Protocols for Permanent Flow Monitoring: A Case StudyTBA from McKim & Creed

State of the States - Emerging Water Loss Regulations and Validated Benchmarks in the North AmericaSteve Cavanaugh, Cavanaugh

http://www.crupumps.com



Exhibitors3M Electrical Markets (511)

A.C. Schultes of Carolina (239)Contact: Jennifer Moore3887 S. NC Highway 41, Wallace, NC 28466910-285-7465jennifer@acschultesnc.comwww.acschultesnc.comA.C. Schultes of Carolina provides a full range of water and wastewater construction services to government utilities, private utilities, engineering firms, industrial facilities, commercial farms, golf courses and more. Our field services include the maintenance, emergency repair, improvements, inspections sales and new installations of water booster, sewage lift, irrigation and other pump stations; vertical turbine, horizontal split-case and end suction pumps, submersible pumps, vertical and horizontal motors and valves as well as sewer rehabilitation and the installation of concrete and piping for elevated storage tank foundations. Our water well services include design, installation, repairs and rehabilitation.

ACIPCO - American Flow Control (612)

Contact: Terry Freck3825 Blount Court, Mathews, NC 28104704-533-6495American-usa.comAMERICAN Flow Control is a division of AMERICAN Cast Iron Pipe Company, founded in Birmingham, AL, in 1905. AMERICAN manufactures ductile iron pipe, spiral-welded steel pipe, fire hydrants and valves for the waterworks industry and electric-resistance-welded steel pipe for the oil and natural gas industries. Find out more at American-usa.com.

ADS Environmental Services (505)

Advantage Industrial Automation (539)

Allis Concrete Construction, LLC (513)

AMD Solutions, Inc. (509)

Aqua-Pipe/Sanexen Water Inc. (640)

Contact: Ron Glive9935 Catania Avenue, Entrance 1, Room 200Quebec, Canada J4Z [email protected] main rehabilitation.

BECK - Harold Beck & Sons, Inc. (236)

Beck Sales & Engineering (338)

Bio-Nomic Services, Inc. (616)

C2I Control Instruments, Inc. (238)

Carolina Civilworks Inc. 635

Carolina Management Team, LLC (434)

Contact: Wendy Banks49 McDowell Street, Asheville, NC 28801336-431-7708 Fax: 336-431-7709Wendy@CMTcoatings.comwww.CMTcoatings.comInfrastructure rehabilitation: concrete repair, coatings, leak repair of tanks, containments, basins, clarifiers, pipe galleries, manholes, pump and lift stations for water and wastewater industry.

Carotek, Inc. (119, 121)

Charles R. Underwood, Inc. (116)

Charles R. Underwood, Inc.serving the people of North and South Carolina since 1965

Contact: Clay Phillips2000 Boone Trail Road, Sanford, NC [email protected] service the municipal, agricultural, wastewater, and industrial water markets specializing in all types of centrifugal pumps including vertical turbine, horizontal split case, end suction, close-coupled, dry pit and submersible sewage, and more. We offer field services, shop service and repair, well drilling, and electrical and engineering support services to complement our pump sales and service.

ClearWater, Inc. (411, 409, 407, 405, 403, 504, 506, 508, 500, 502, 510)

Contact: Shad StringfellowPO Box 1469, Hickory, NC 28603828-855-3182shad@clearwaterinc.netwww.clearwaterinc.netClearWater, Inc. represents more than 65 manufacturers of water and wastewater equipment in North Carolina, South Carolina, and Virginia. Our full-service motor and machine shop, and our service and maintenance teams can provide start-up service, pump and process equipment service and repair, and maintenance programs and services.

Crom (537)

Contact: Joe Swann250 SW 36th Terrace, Gainesville, FL [email protected] designs and builds prestressed concrete tanks for water storage and wastewater treatment. Since 1953, CROM has constructed over 4,100 tanks in accordance with AWWA D-110 standards. Our experience makes us uniquely qualified to provide tanks with the highest quality and safety. Watertightness guaranteed. Contact us: 352- 372-3436, www.cromcorp.com.

Crowder Construction Company (240)

Contact: Linnell Stanhope1111 Burma Drive, Apex, NC [email protected] Construction Company is an ENR Top 400 General Contractor serving the Southeast for over 68 years. Projects are completed by design-build, EPC, construction manager and traditional methods. Crowder has self-performance capabilities on water/wastewater facilities, heavy civil, electrical, federal, solar and renewable energy projects.

This list is current as of July 30, 2015.An updated list and map of the exhibit hall is available at http://shows.map-dynamics.com/95thannualconference/



NC AWWA-WEA


NC AWWA-WEA



http://www.acschultesnc.com


http://www.aqua-pipe.com

http://shows.map-dynamics.com/95thannualconference/


http://www.CMTcoatings.com




http://www.clearwaterinc.net


http://www.cromcorp.com



http://www.crowdercc.com


http://american-usa.com

Full service, troubleshooting and repair center for all

wastewater pumping systems

Over 30 years of experience in offering fine products and services within the water and wastewater pumping and treatment industry.

We are here to serve you with offices in North Carolina and South Carolina.

2219 Leah Drive Hillsborough, NC 27278 Phone: 919-245-5070Fax: 919-245-5071www.peteduty.com

http://www.peteduty.com


Daparak Inc. (605, 607, 609)

Dixie Electro Mechanical Services Inc. (634)

Contact: Peggy Hunnicutt2115 Freedom Drive, Charlotte, NC [email protected] Electro Mechanical Services is a leading solutions provider of electro mechanical repair services for industrial manufacturing, water/wastewater plants, municipalities and facilities management contractors throughout North Carolina, South Carolina and Virginia.

ECS Carolinas, LLP (440)

EMA Resources, Inc. (536)

EW Process (230)

EW2 Environmental, Inc. (304, 302, 306)

Contact: Shane Eckley7245 Pineville-Matthews Road, Suite 100Charlotte, NC [email protected] 1991, EW2 Environmental, Inc. has provided local representation for top manufacturers of water and wastewater treatment equipment including headworks, process, sludge treatment, chemical feed and disinfection equipment.

Ferguson Waterworks (633)

Contact: Bryan Jones1044 Taylors Creek Drive, Greenville, NC [email protected], sewer, & storm distributor.

Flygt Products, a Xylem brand (128)

Contact: Mike Wallace14125 South Bridge Circle, Charlotte, NC [email protected] is a world-leader in the design and manufacture of dry and submersible pumps, mixers and related intelligent controls systems.

Frazier Engineering P.A. (211)Contact: Dan Anderson6592 Bob White Trail, Stanley, NC 28164704-822-8444danderson@frazier-engineering.comwww.frazier-engineering.comFrazier Engineering is a civil engineering firm focused on the design, evaluation, and rehabilitation of wastewater collection systems. Our areas of expertise include sanitary sewer evaluation services, collection system flow monitoring, new sewer design, sewer rehabilitation design, and construction management services.

Freese and Nichols, Inc. (339, 337, 341)Contact: Mike Wayts1017 Main Campus Drive, Suite 1200Raleigh, NC [email protected] and Nichols, Inc. is an innovative consulting firm offering engineering, architecture, environmental science, construction, and planning services.

Garney Construction (235)

Contact: Mark Kelly370 E. Crown Point RoadWinter Garden, FL [email protected] Construction is a 100% employee owned company specializing in water and wastewater treatment facilities, pump stations, pipelines, water storage tanks, and associated heavy civil infrastructure. Garney has more than 1,100 current employee-owners across the United States generating annual revenue in excess of $600 million.

Hach (308)Contact: Jerry McClamPO Box 389, Loveland, CO [email protected] and software solutions for process control and laboratory to control water quality.

Haskell (630)

Heyward Incorporated (531, 527, 529, 525, 523, 521, 519, 517, 512, 413)

Contact: Tim Bishop or Tony Mencome2101-A Cambridge Beltway DriveCharlotte, NC [email protected] the Carolinas for over 100 years, Heyward Incorporated represents industry leaders in the supply of water and wastewater process equipment. Heyward Incorporated provides services from initial inception through project completion and beyond with unparalleled engineering, aftermarket, and service support.

Hydrostructures, P.A. (534)

Interstate Utility Sales, Inc. (216)

Keller America Inc. (541)

Kemp Construction Inc. (300)

Kimley-Horn and Associates, Inc. (441)Contact: Mike Shelton, P.E.200 South Tryon, Suite 200Charlotte, NC 28202704-333-5131mike.shelton@kimley-horn.comwww.kimley-horn.comAs one of the country’s premier design consulting firms, Kimley-Horn has many disciplines but one expertise: making our clients successful. With offices nationwide and four in NC, our engineers, planners, and environmental scientists provide services in aviation, environmental sciences, land development, landscape architecture, transit, transportation, urban planning, and water resources.

Kruger Inc. (103)

Exhibitors This list is current as of July 30, 2015.An updated list and map of the exhibit hall is available at http://shows.map-dynamics.com/95thannualconference/



NC AWWA-WEA


NC AWWA-WEA



http://www.dixieemsi.com


http://www.ew2.net


http://www.ferguson.com



http://www.flygtus.com


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Contact: Randall CooperPO Box 773537, Ocala, FL [email protected] CTF™ is an environmentally preferable ceramic novolac epoxy lining for ductile iron pipe/fittings. The benefits of this sanitary sewer lining are numerous: Coal tar free, carcinogen free, no odors, no HAPS, green or red color, longer ground storage compared to other lining, can be hydro-jetted without voiding manufacturing warranty.

Pete Duty and Associates, Inc. (435, 437)

Contact: David Duty2219 Leah Drive, Hillsborough, NC 27278919-245-5070pdamail@peteduty.comwww.peteduty.comManufacturer’s rep for Sulzer/ABS Pumps.

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Precon Tanks (334)Pat Wheeler115 SW 140th Terrace, Newberry, FL 32669352-332-1200pjw@precontanks.comwww.precontanks.comPrestressed concrete tanks for water and wastewater storage and treatment.

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SpectraShield Liner Systems (234)Contact: Sims Rhyne4527 Sunbeam Road, Jacksonville, FL 32257904-419-4889jsrhyne@spectrashield.comwww.spectrashield.comSpectraShield® a patented, systematic layering of polymer resins designed to rehabilitate and protect wastewater structures such as manholes, wet wells, or wastewater treatment plant facilities. SR&R Environmental, Inc. (201)

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Contact: George MitchellPO Box 249, Harrisburg, NC [email protected] Specialties, Inc., is a manufacturer’s rep firm incorporated in 1987, offering high quality and innovative valve solutions for the most demanding water and wastewater applications. Primary lines include: Valmatic, Red Valve, Tideflex and Permox CTF (coal tar free) sewer coatings. Newest offerings include the checkmate inline check valve and the all stainless surge suppression air valve.

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NC AWWA-WEA invites you to join us at the Crowne Plaza in Asheville for the 15th Annual Spring Conference. The conference will take place April 17-19, 2016 when the weather is sure to be gorgeous!

Originally titled ‘Spring Fling,’ the first Spring Conference was held in 2002 at the Wilmington Hilton Riverside. The Spring Conference Committee made an exciting change this year – a new venue located in the beautiful North Carolina mountains!

Monday and Tuesday will feature technical sessions on water, wastewater

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and special topics, running concurrently with the Operations & Maintenance track. Monday will include equipment demonstrations, and Tuesday afternoon will also include two forums. All of these informative sessions will give certified operators and professional engineers a chance to earn their continuing education credits while expanding their knowledge of the field. Six credit hours will be offered each day.

There is no better time to visit Asheville than in the springtime! Enjoy all the

amenities that the Crowne Plaza has to offer. Or tour the historical city and all the exceptional shops. Hiking, biking and scenic tours are just a few miles away. There will be plenty to do and lots of folks to meet during this special event.

This year’s Spring Conference Committee started working early and hard to make this a worthwhile event for you. We hope you will join us in Asheville! To join the committee, please contact Mary Knosby, 704-338-6857, [email protected].

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Trenchless Technology:Trenchless Technology:NOT A BORING SUBJECT

What is Trenchless Technology?

62Tunnel Vision – A Primer on Trenchless

Construction Methods and Experiences for Pipelines in the Piedmont Geology

66Getting Reacquainted with Sewer Rehab

70Two New Promising Tools for the Condition Assessment

of Ferrous Pressure Pipelines

74Plan B for HDD: Customizing a Challenging Installation

78North Carolina Takes the Lead in Water Main and Force Main Pipe Bursting

82





The name pretty much says it all – trenchless technology is a means to construct, rehabilitate or inspect existing underground pipes and structures with little or no need to dig a trench. The North American Society for Trenchless Technology’s (NASTT) technical definition is as follows: “A family of construction techniques for installing or rehabilitating underground infrastructure with minimal disruption to surface traffic, businesses, and residents. It also includes technologies for inspection, leak location, and leak detection with minimal disruption and minimal excavation from the ground surface.”

This edition of NC Currents will focus on the trenchless industry, with several articles about the topic. In addition, this article provides an introduction into trenchless technology by outlining the three main areas of trenchless practices: construction, rehabilitation and condition assessment. The following table identifies some prominent trenchless methods within each particular category.

TRENCHLESS CONSTRUCTION

Many options are available for construction of new buried assets without the need for significant excavation. Determining which method is most appropriate requires an understanding of many factors including, but not limited to, purpose (e.g., water

main, gravity sewer, force main), utility size, length to be installed, soil conditions, surface features, subsurface features, groundwater, and possible environmental contamination. A brief summary of each method follows:

1. Horizontal Auger Boring (Bore and Jack) – Auger boring involves the use of an auger machine to bore a cylindrical hole in a linear fashion. The surrounding soil is stabilized by a casing pipe (inserted by powerful jacking devices) while the spinning auger removes the soil from the face of excavation back to the launching pit. Once the casing is installed, a carrier pipe can be strung through the casing. Mixed soil conditions of rock and soil or encountering obstructions such as boulders or manmade items may result in a failed installation.

2. Horizontal Directional Drilling (HDD) – HDD creates a pilot bore along the design pathway and reams the pilot bore hole to a larger diameter in one or more additional passes to a diameter suitable for the carrier pipe, which is pulled into the prepared bore in the final step of the process. The process is steerable and follows a vertical arc and possibly a horizontal arc, too. One significant advantage of HDD is that no excavation

What is Trenchless Technology? By Steve Hilderhoff, PE - Dewberry

TRENCHLESSCONSTRUCTION

TRENCHLESSREHABILITATION

TRENCHLESSCONDITION ASSESSMENT

• Horizontal auger boring (a.k.a. bore and jack)

• Horizontal directional drilling (HDD)• Pipe jacking• Pipe ramming• Tunneling via Tunnel Boring Machine

(TBM) and Microtunnel Boring Machine (MTBM)

• Handmining

• Cured-in-place (CIP) lining (a.k.a. relining)

• Sliplining• Pipe bursting• Coating systems• Grouting

• Camera• Acoustic• Electrical/electromagnetic• Laser

HDD pullback.

Horizontal auger bore launch pit.

is necessary to install the pipe. HDD in rock is possible, but can be more costly than other trenchless methods because of the equipment and number of reams necessary to remove rock. In addition, HDD is not recommended in mixed soil conditions with rocks/boulders.




3. Pipe Jacking – Pipe jacking is the installation of a casing pipe using jacks that force the casing pipe forward while workers remove soils from the face of the jacked pipe. Jacking requires a minimum casing pipe diameter of adequate size (say 48-inches) to allow for working space and soil removal. Jack hammers, picks, shovels and even rock blasting are used to remove material.

4. Pipe Ramming – Pipe ramming is accomplished by percussion hammering a casing pipe through the soil, and is used in softer soils, but not solid face rock. As the casing is progressed forward, the soils are simply ‘gobbled up’ and then removed by an auger, air or water jetting. Pipe ramming is non-steerable, and as such, not typically used for gravity sewer main installation. Pilot tube pipe ramming can, however, be used to achieve accurate grades, but the current technology is not widely available.

5. Tunnel Boring Machine and Micro Tunnel Boring Machine (TBM and MTBM) – NASTT defines a TBM as “A full-face circular mechanized shield machine, usually of man-entry diameter, steerable and with a rotary cutting head.” TBM is used for larger diameter casing pipe projects. Where smaller diameter casings of approximately 30 to 96-inch are required, MTBM can be used. MTBM is similar to TBM, except that it is remotely controlled from above the ground (i.e., too small to fit a person within the equipment). Sometimes, the casing pipe serves as the carrier pipe in which case the process is referred to as a ‘one pass install.’

6. Handmining – A handmined tunnel is the oldest method available in the trenchless industry. The tunnel must be large enough for equipment and personnel to manually remove soil from the face of excavation. This method is slow and costly, but provides accuracy and handling of hard rock or obstructions. Nearly any shape, size or distance can be handmined.

TRENCHLESS REHABILITATION

Many trenchless rehabilitation methods are available for the water and sewer industry.

Oftentimes the myriad of options can be overwhelming when determining an appropriate rehabilitation method. When determining which method is most appropriate, many factors should be considered. Some factors include structural or non-structural repair, traffic impacts, corrosion resistance, duration of temporary bypass pumping around work, gravity flow pipe or pressure pipe rehabilitation, need for additional capacity, nature and severity of defects, little or no allowable excavation and so on. The following list of trenchless rehabilitation

methods is intended to simply introduce readers to the various available options.

1. Cured-In-Place (CIP) Lining – CIP involves impregnating a fabric with a resin and, once inserted into the pipe or structure, air or water is forced into the liner so it expands to the inside shape of an existing pipe or conduit and allowed to cure. Curing can be done by steam, hot water, ultraviolet light or ambient air temperature. In addition, CIP can be used on different shapes and sizes of structure. Liners do not bond to the host pipe or structure, but

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rather fit to the host pipe’s shape. CIP offers many benefits, and depending upon the liner thickness can provide either partial or full structural stability.

2. Pipe Bursting – Pipe bursting involves either pushing or pulling new pipe through existing pipe and as the process proceeds forward, a bursting head (which is larger than the existing pipe) causes the existing pipe to fracture and be expanded into the surrounding soil. With this method, excavation is necessary for launching pits, receiving pits, service reconnections, and appropriate existing pipe repairs. Pipe bursting offers moderate pipe upsizing, and the existing soil conditions and the host pipe type, fittings and bends can affect its success.

3. Sliplining – Sliplining is the simple method of installing a smaller pipe inside a larger pipe. Once installed the void space between the two pipes is filled with grout and the ends sealed. While this method reduces cross sectional area because of the smaller pipe diameter, it does limit excavation to entry points, service reconnections, and defect repairs necessary such that the new pipe can successfully pass through the host pipe. Carrier pipes can be continuous length (e.g., HDPE or fusible PVC), segmental (i.e., sections of pipe) or even spiral wound. A ‘U’ shaped liner that is reformed inside the host pipe is a modified sliplining method.

4. Coating Systems – Coating systems can include polyurethanes, polyurea,

Static pipe bursting Rehabilitated manhole

epoxy, and cement. Within each of these categories, even more coating system options are available. The success of these products is highly dependent upon existing surface condition, quality of surface preparation before application, existing water infiltration and the applicator’s care and ability. Determining which product to use depends upon chemical resistance, abrasion resistance, cure time, substrate condition, structural or non-structural rehabilitation, and application environment (potable water or sewage) – just to name a few.

5. Grouting – NASST defines grouting as “filling voids or modifying/improving ground conditions. Grouting materials may be cementitious, chemical, or composed of other mixtures.” Pipe grouting is typically performed by use of a packer whereby the grout is forced into cracks, joints or service connections. Structural grouting is achieved by forcing grout through injection holes (ports) drilled into the structure. As grout is injected, it permeates through the void into the surrounding soil thereby creating a seal.

TRENCHLESS

CONDITION ASSESSMENT

Trenchless condition assessment is a field with many available options and worthy of extensive discussion beyond this brief summary. Structures, gravity flow pipes and pressure pipes can be inspected within the assessment process. The Environmental Protection Agency (EPA) has divided inspections into five groups; camera, acoustic, electrical/electromagnetic, laser and emerging technologies. Some inspection devices can cross over into location and leak detection as well. In addition, they can also be categorized into destructive and non-destructive methods.

1. Camera – Camera inspection is the most commonly used method in the sewer industry, and includes the traditional closed-circuit televising (CCTV) camera and sewer scan technology. Cameras can crawl, can be pushed or pulled through

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pipes, and can be pole mounted with zoom cameras. CCTV inspection is not intended for full-pipe flow conditions.

2. Acoustic – Acoustic inspection (and leak detection) detects vibrations and sound waves by use of devices either on a pipe or traveling through a pipe. Some acoustical methods are non-intrusive as they are attached to or rest upon some feature of the pipe network. Other technologies are inserted within the pipe and travel some distance while collecting data and ultimately retrieved/captured. The data from acoustical devices is then downloaded and interpreted to determine condition based upon leaks. Regarding sanitary sewer applications, sonar systems can be used for full-pipe conditions such as surcharged sewers, siphons and submerged outfalls.

3. Electrical/Electromagnetic – Electromagnetic inspection methods are based upon either the magnetic flux leak

(MFL) or eddy current (EC) principals. Thus, they only apply to either a ferrous pipe or a pipe with a ferrous component (e.g., wires, bars). Magnetic flux methods detect metal loss by changes in magnetic flux, and EC measures changes in impedance to detect defects and failures.

4. Laser – Laser profiling creates an image of the pipe’s interior wall by transmitting a 360-degree beam. By determining pipe shape, many aspects of the pipe’s condition can be determined such as shape, debris accumulation and service connection location. Lasers are often used in conjunction with cameras or acoustic methods as an added assessment tool.

ADDITIONAL INDUSTRY

INFORMATION

There are many trenchless industry trade associations. Two prominent organizations

include the National Association of Sewer Service Companies (NASSCO) and North American Society for Trenchless Technology (NASTT). Each association provides a forum for education, training, guidance documents, sample specifications, and even employee certification in some cases. NASSCO also has divisions such as the International Infiltration Control Grouting Association and International Pipe Bursting Association. The Environmental Protection Agency (EPA) and the Water Environment Research Foundation (WERF) also offer guidance documents.

Within North Carolina, the NC AWWA-WEA Wastewater Collection and Water Distribution Systems Committees provide a forum that offers information on important water and sewer topics including systems operation and maintenance and the regulatory climate. As such, these groups often discuss trenchless practices as they pertain to the water and wastewater industry.

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As the Carolinas have grown rapidly the past 15 years, particularly along the Interstate 85 corridor, many large-diameter water and sewer pipelines have been constructed to meet water and wastewater demands of the expanding population and aging infrastructure. Many projects have extensively used trenchless construction methods to minimize impacts on urbanized areas, cross roadways and railroads, maintain public and commercial operations, and limit environmental impacts and disturbance.

Typical trenchless construction methods for pipelines installed in the Carolinas include:• Bore and jack• Hand-mined liner plate tunnels• Hand-mined jacked casing pipe• Machined tunnelsEach method offers distinct advantages and disadvantages. These methods and their recent application in the Carolinas are highlighted below.

BORE AND JACK

Bore and jack methods have been used extensively in the Carolinas. While typically chosen for smaller-diameter utilities, improved technology allows bore and jack methods to be used for larger crossings. Casing diameters up to 72-inches, and in some cases larger, are now available. In ideal soils, bore and jack methods can be cost-effective and allow a rapid crossing of obstacles. For large diameter crossings, bore and jack methods can pose risks: increased exposure of the tunnel crown (the tunnel/crossing at the 12 o’clock position) at the face of the excavation, difficulty handling hard rock and mixed face (i.e., a mix of soil and rock) conditions, limited access to the face of the excavation to make repairs, and limited equipment of regional contractors.

One example of a bore and jack project is the Water and Sewer Authority

of Cabarrus County WSACC’s Fuda Creek Sanitary Sewer, which included two trenchless crossings of North Carolina Department of Transportation (NCDOT) roadways. Originally bid as hand-mined tunnels, the contractor proposed and was approved for bore and jack methods. A 60-inch casing was installed with a 24-inch carrier sewer pipe. Geotechnical borings indicated that the area likely contained substantial rock either in outcroppings or mixed face conditions. These subsurface conditions led to the casing pipe becoming stuck halfway through the crossing, damaging the boring augers (see Figure 1) and the contractor ultimately finishing installation with hand-mining methods.

HAND-MINED LINER PLATE TUNNELS

Hand-mined liner plate tunnels are a tried and true method used on some of the first tunnels constructed. This method is typically appropriate for tunnel diameters 54-inch diameter and larger to provide access for workers to enter the tunnel and perform the work. While mitigating risk by allowing adaptability to changing geologies and groundwater, it slows progress and increases costs per linear foot compared to bore and jack methods. Blasting, jack hammering, or chemical expanders can all be used to remove rock in hand-mined tunnels. Typically, a shield is installed at the face of the excavation to protect the crown of the tunnel and minimize potential for ground settlement.

Charlotte Water successfully used the hand-mined liner plate tunnel method crossing Tyvola Road to install a 72-inch diameter gravity relief sewer discharging into the 200-mgd influent pump station at Charlotte Water’s Sugar Creek Wastewater Treatment Plant. For this tunnel, 96-inch

Tunnel VisionA Primer on Trenchless Construction Methods and Experiences for Pipelines in the Piedmont Geology

By Jonathan S. Lapsley, PE and Christopher M. Kolkhorst, PE – CDM Smith

Figure 1




diameter liner plates accommodated the 72-inch sewer. The tunnel encountered mixed face conditions of rock and soil. The strength of liner plate construction was proven when a rain event flooded the tunnel and eroded the roadway banks – but did not damage the tunnel liner plates or the excavation face (see Figure 2).

Seven large-diameter hand-mined liner plate tunnels were constructed in varying subsurface and groundwater conditions during the first two phases of Charlotte Water’s Briar Creek Relief Sewer project (with more tunnels proposed for Phase III), proving this method’s adaptability. This method also provides flexibility to meet stringent requirements set by regulatory agencies and owners of aboveground features. For example, the Phase II project required crossing a CSX railroad in extremely hard rock. The CSX encroachment agreement prevented blasting within the railroad right-of-way. Hand-mining with liner plates, expansive chemical, and jack hammering methods allowed the crossing to be completed without damage to the railroad and within the requirements of the encroachment agreement.

Once a hand-mined tunnel is completed, the carrier pipe is placed using rails or spacers to position the pipe and bell up the joints inside the tunnel. Figure 3 shows pipe in the Briar Creek Relief Sewer being placed into one of the many tunnels on the project.

HAND-MINED JACKED CASING PIPE

Another type of hand-mined method is using a jacked casing pipe (similar to the bore and jack method) but with hand mining rather than augers at the excavation face. This type of construction is most commonly selected for 54-inch-diameter

and larger crossings for reasons mentioned previously. This method may increase production and construction speed over hand-mined liner plate methods. This method readily adapts to changing geologies and groundwater with rock removal occurring by blasting,

Figure 2 Figure 3

WATER & WASTEWATER CONSTRUCTIONMAINTENANCE REPAIRS IMPROVEMENTS

INSPECTIONS SALES & INSTALLATIONWELL DRILLING & REHABILITATION

PUMPS & MOTORS VALVES EMERGENCIES

BEFORE AFTER






jack hammering, or splitting/chemical expanders. A shield is also typically installed with this method to protect the crown, minimize settlement, and promote worker safety. Most regional bore and jack contractors are experienced with this type of equipment.

Charlotte Water’s Southwest Water Main Phase B project included several 72-inch diameter casings constructed in this fashion for a 48-inch water main pipe. Project crossings were primarily constructed in soil with a casing shield constructed by cutting out the bottom half of the leading piece of casing pipe. A local contractor in the Charlotte area was cost-competitive on this large-diameter trenchless work through this alternate construction method. Figure 4 shows a piece of casing pipe being jacked into place.

MACHINED TRENCHLESS CROSSINGS

A variety of machines can be used to construct trenchless crossings. Machines can be highly accurate and cost-effective for large diameter or long crossings. Machines typically require consistent

geology–either soil or rock–to properly select the type of machine and its front-mounted cutting head. Due to the cost of purchase and specialty operations, limited qualified contractors are available for this construction method. This typically leads to higher installed costs for trenchless crossings of smaller obstacles. Specialty tunnel boring machines also result in larger equipment mobilization costs and potential costs for delays if the machine is challenged due to unforeseen subsurface conditions.

Machined tunnels were constructed on Charlotte Water’s Irwin Creek Relief Sewer Projects in both soil and rock conditions (see Figure 5). Contract I included 745 feet of an 84-inch soil machine crossing of I-77. Contract II included a 1,300-foot machined tunnel across a Norfolk Southern railroad, an I-77 access ramp, and Wilkinson Boulevard (1,300 feet). This project also included a 190-foot microtunnel crossing of East 5th Street (see Figure 6) with a remotely steered machine. The Irwin Creek projects recognized variability in the Piedmont area geology, leading to multiple methods being employed.

Machined tunnel methods were also part of Charlotte Water’s Southwest Water Main Phase A project at the Charlotte-Douglas International Airport, which included twelve individual trenchless crossings ranging up to 96-inches and 2,400 feet of rock tunnel (in two tunnels). One tunnel had fractured rock at the crown in the last several hundred feet, which impacted the ability of the machine to proceed. The tunnel was ultimately finished with open-trench construction methods. A photo of the tunnel and carrier pipe in competent rock is provided in Figure 7.

CONCLUSIONS

Experience with over 30 trenchless designs in the past 15 years in the Carolinas and the Piedmont geology reveals four keys to success with trenchless pipeline construction:• Conducting sound field investigations

during the design phase to establish the subsurface conditions, particularly geologic materials and their consistency across the crossing length and face.

• Selecting alternate means and methods to match the subsurface conditions and contractor capability regionally available. Faster is not always cheaper!

• Establishing minimum contractor qualifications based on the scope of the work and anticipated construction conditions.

• Anticipating and taking measures to adequately mitigate risks or share the risk appropriately.

ABOUT THE AUTHORS

Jonathan S. Lapsley, P.E. is an Associate Engineer and project manager with CDM Smith. He is experienced with design and construction of various water and wastewater systems. He currently serves on the NCAWWA-WEA Board of Trustees.

Christopher M. Kolkhorst, P.E. is a Principal Engineer, project manager, and local team leader with CDM Smith. He has 21 years of experience in design-phase and construction-phase project delivery for treatment, pumping, and conveyance facilities.

Figure 4

Figure 6

Figure 5

Figure 7


www.valvespecialties.com





INTRODUCTION

The sewer rehab industry in the US has evolved substantially over the last 25 years. Rehab products have come and gone through the years, but cured-in-place pipe lining (CIPP) has remained (and evolved) as the primary method used by utilities throughout North Carolina to rehabilitate leaking and defective sewer pipes.

CIPP was first introduced to the US in the late 1970s/early 1980s as a patented product from Europe with a single installer. Once the original patent expired in the 1990s, the market was open to additional products and installers. The opening of the market to additional installers increased competition and has driven down prices over the last 25 years. The CIPP cost in my first project in 1992 was $70 per foot for 8-inch pipe. The low bid on a recent project (March 2015) was $25 per foot for 8-inch pipe. The drastic reduction in cost has made the use of CIPP more widespread and, typically, the preferred method of rehabilitating sewers.

As more and more competition has evolved, technological advances have also been made by the lining companies, from resin enhancements to changes in how CIPP is installed. Installers (contractors) have also changed – from massive lining conglomerates to small one-crew operations. All of these changes warrant close consideration when specifying CIPP on a sewer rehabilitation project. This article reviews some of the key issues that should be carefully considered by all cities undertaking a CIPP rehab project.

PROJECT IMPLEMENTATION

The first consideration should be determining the best approach to implement your rehab project – either by a standard design approach (televise the sewers,

review the videos and develop a detailed set of design drawings) or by a ‘find-and-fix’ approach (do the television inspections and design during construction). Each concept has pros and cons that should be carefully considered, including the size of your contract and budget, timeline for implementation, and preferences by the city.

Charlotte began utilizing ‘find-and-fix’ projects in 2000, before the catchy term ‘find-and-fix’ was created. Since 2000, Charlotte has saved over $9 million by following this approach. That is a substantial savings for Charlotte, and Charlotte prefers ‘find-and-fix’ contracts to the standard design approach. Other cities across North Carolina have also seen significant benefits using this approach. ‘Find-and-fix’ is not for everyone or every contract, but it is certainly worth close consideration. ‘Find-and-fix’ approaches have been discussed in NC Currents previously and at the state conferences, so more detailed information is available for review from these previous publications.

CIPP CONSIDERATIONS

AND SPECIFICATIONS

To keep up with the constantly changing CIPP industry, below are some key issues that should be considered when specifying CIPP for your rehab project and developing your standard specifications.

• What repairs are needed prior to lining? With more and more competition and with more and more new CIPP installers, cities are often convinced to line through sewers that have significant issues that should be repaired (by excavation) prior to installing the CIPP, such as significant sags in the sewers and broken or damaged pipes. This is not a criticism of the CIPP

installers, just a key question that cities must decide on at the project outset. It is true that almost any sewer pipe can be lined through, but does the end result take care of your ultimate needs and issues? I have personally seen many sewers that have been lined with CIPP that should have had repairs completed prior to the lining, and cities are now dealing with additional repairs several years after the lining was completed to completely solve the problem. Decide on your own criteria for what is lined and what isn’t lined, and always consider the long-term.

• What experience requirements are you comfortable with? There are CIPP installers doing work in North Carolina that have a few thousand feet of CIPP experience all the way up to many millions of feet of CIPP. What is important for your project? What diameters will you be lining? You definitely want contractors with experience (on your size sewers) and the financial backing to stand behind their product and deal with problems that will inevitably arise. Don’t just accept anyone as your CIPP installer. Do your homework, check references, make sure the contractor is qualified and experienced. Also, specify experience requirements for the superintendent that will be on your project – it is critical that your superintendent has significant experience. Engineers should be experienced too.

• Water cure versus steam cure: Water installation and curing of CIPP was the original method used and is still widely used today. Steam cure came and went in the 1990s/early 2000s but is now a more widely used method. Steam is the preferred method by many contractors today since it is much quicker than water cure. What are you comfortable with?

Getting Reacquainted with Sewer Rehab

By Aaron Frazier, Frazier Engineering, P.A.




What are your specific sewer conditions that you will be lining through? Water cure will work in pretty much every circumstance. Steam cure has some limitations that, if not adhered to, could lead to failure of the lining. We specify both, but do put limitations on when and where steam can be used. We were guinea pigs for steam cure back in the early 2000s, and we had several liner failures that led to sewer overflows. Do your due diligence when selecting the installation method. Make your own decisions and don’t assume either method is appropriate for every circumstance, because that is not the case.

• UV cure: UV Cure is the new kid on the block. UV-cured CIPP is much stronger than traditional CIPP. Due to its strength, UV installers push to install much thinner liner. Are you comfortable with installing a much newer technology with limited experience? Are you comfortable with a much thinner liner? I personally have no experience with UV liner installations except for performing liner calculations for a few of the UV installers. The product looks promising. I plan on watching for a while to see how this technology further unfolds over the long term and what long-term experiences cities have with the installed product.

• Filled resins versus non-filled resins: Resins have changed dramatically over the last several years. It seems there are hundreds of options. Most CIPP installers utilize resins that contain fillers to lower their costs. Non-filled, premium resins are more costly but provide a premium product. What are you comfortable with? What fillers are being added to your resin? What are the cost implications? Do your due diligence on this topic as the resin is ultimately your final CIPP product. Study the details of the proposed resin, ask questions, and make sure you are getting what you specified. Any added fillers should really only be for strength-enhancing purposes.

• Styrene-based resins versus non-styrene-based resins: The resins used in CIPP contain styrene, which is deemed a hazardous material by the EPA. Styrene is the odor you smell during the CIPP curing process, and often prompts complaints and concerns from citizens and environmental groups. It seems styrene complaints and concerns have increased over the last several years. As an alternate, non-styrene-based resins are now available, but these resins substantially increase the cost of the CIPP. In addition, contractors have very little experience with these resins. If you have some very sensitive areas, maybe you should consider a non-styrene resin. Always include an action plan for if/when a styrene complaint occurs – it is critical to address any such complaint in the correct manner or the complaint may lead to much bigger issues.

• Specify your desired finished properties of CIPP: It is important to specify exactly what you expect your final installed CIPP product to be in terms of strength and thickness, and don’t waiver from your specifications. Test the installed CIPP using a certified independent testing lab, test the CIPP

often, and stick to your specifications. Yes, there will be reasons provided for why a failed test might have occurred. Consider those reasons carefully but stand by your specs as much as possible.

• Pay close attention to the details: With more and more CIPP being installed throughout North Carolina, the tendency seems to be, in many cases, to rely heavily on the contractors to get the lining installed quickly and for them to ‘do what they know how to do.’ Utilities still need to pay close attention to the details to make sure the CIPP meets their long-term needs and objectives, and not just rush to get liner installed. For example, one big detail that seems to get overlooked is specifying how to seal the CIPP connection at the manhole. A waterstop must be used at the manhole connection or infiltration will continue. It takes extra time to install the waterstop, but it is critical to stopping the water. Another detail that often gets overlooked is fully opening and brushing the service connections smooth. This takes time, and often contractors are pushed to move to the next installation.

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• Document the CIPP process from beginning to end: It is important to track the CIPP process from beginning to end. Start at the wet-out facility (where the CIPP is made) and make sure you get the wet-out reports to document all components that went into making the CIPP. Get resin and felt certifications. Make sure you know if any products or components of the

CIPP have changed (contractors may switch resins from time to time due to cost fluctuations). Make sure you get the installation reports that document times and temperatures for each phase of the installation all the way through cool-down. Make sure you know how each section of CIPP was supposed to be installed. You are basically making a pipe product

in the field so you need to document exactly how the pipe (CIPP) was made.

• Always perform and review post-CIPP televisions inspections: It is standard practice to televise CIPP after it is installed. It is critical that the post-CIPP inspections be closely reviewed and defects identified and repaired. You do not want to accept j ust any liner as it is installed. There will be issues with the CIPP from time to time that need to be addressed for the long-term good of the utility. Everyone is busy these days, but take the time to closely review every foot of post-CIPP video.

• Inspect the CIPP work using a trained inspector: It is essential that the CIPP installation be closely inspected by an experienced inspector. CIPP is much different than other sewer construction, and knowing what to do and look for is critical to the long-term success of the CIPP liner. The National Association of Sewer Service Companies (NASSCO) now offers a CIPP inspector training class that I hear is very good. Training may be also possible through experienced engineering firms. Investing in training inspectors really is a key to long-term success.

CONCLUSION

CIPP is being used by so many cities across North Carolina. The CIPP industry has changed tremendously over the last several years, and it continues to change. Cities must keep up with the changes to make sure their CIPP installations are quality installations that will meet their needs for the long term. Change is good. Enhancements and improvements to CIPP technologies are good. But each change should be closely reviewed to make sure it is good for the city.

ABOUT THE AUTHOR

Aaron Frazier, P.E., is the Owner and President of Frazier Engineering, P.A., located near Charlotte, NC. Frazier Engineering specializes in sewer rehabilitation design and construction management, having designed over 3 million feet of CIPP lining over the last 17 years.


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INTRODUCTION

Prior to about 2005, the condition assessment of pressure pipelines, including wastewater force mains and water mains, was limited by lack of access to the pipe interiors and by limited selection of reliable inspection technologies. While pipeline access continues to be an issue due to a lack of insertion and retrieval points on most mains, the number of inspection technologies has expanded significantly and the quality and reliability of the condition assessment data has improved as well. This is particularly true for ferrous pipelines. A number of technologies have been developed for both in-line and external assessment of pipe wall conditions in metallic pipes. Two of the latest additions to the ferrous pipe inspection toolbox are the SmartBall® PWA tool introduced by PURE Technologies Ltd. (PURE) and the Bracelet Probe developed by PICA Corporation. Each of these tools will be illustrated through a recent case study conducted by Brown and Caldwell (BC).

PURE’S SMARTBALL PWA

The Mount Pleasant Waterworks (MPW) in Mount Pleasant, South Carolina, has undertaken a comprehensive inspection and condition assessment of their wastewater force main (FM) inventory and especially their ductile iron pipe (DIP) force mains. Critical force mains have been inspected using in-line electromagnetic tools such as PICA’s SeeSnake where feasible. Their 16-inch diameter DIP FM along Highway 17 posed significant technical challenges to an in-line inspection due to the presence of several plug valves on the main, which could interfere with the passage of the SeeSnake. The SmartBall PWA free-swimming acoustic tool from PURE was selected as an alternative since it could negotiate the plug valves. The SmartBall PWA acoustic tool had been fitted with a magnetometer to enable the analysis of the pipe wall conditions along the pipeline.

All ferrous materials exhibit a background magnetic field, which can be detected by the magnetometer. When the ferrous material is under stress, the magnetic field is perturbed. Pipe wall stress can occur due to a number of causes, including casting anomalies, point load stresses or wall loss due to corrosion. A graphic illustration of the impact of stresses on the magnetic field is presented in Figure 1.The results of the SmartBall PWA inspection along a portion of the Highway 17 FM are shown in Figure 2.

The data shows the presence of air pockets (in blue) and the presence of anomalies in the pipe wall magnetic field (in shades of brown). The data is especially valuable when a magnetic anomaly overlays an area where the sound of an air pocket was detected. This provides a stronger indication that the pipe wall is under stress due to internal corrosion, caused by the gas pocket. As noted in Figure 2,

Two New Promising Tools for the Condition Assessment of Ferrous Pressure Pipelines

By Henry R. (Kelly) Derr, PE and Jim Perotti, PE, Brown and Caldwell, Raleigh, NC

Figure 1. Graphic of magnetic anomalies. Figure 2. Example of SmartBall PWA results.




the gas pocket (in blue) and an ‘extra large’ magnetic anomaly (red dot) are considered a high priority for excavation and direct measurement of the wall condition using an external tool such as ultrasonics, Broadband electromagnetic (BEM), or the Bracelet Probe, a new technology discussed below. It is important to note that the PWA tool is best used as a screening tool. While it will not provide direct measurement results, it will provide good indications of where to inspect, especially when paired with the acoustic tool. This approach provides data needed to determine where pipe failures are most likely to occur, allowing better decision-making on follow-up actions for repair, rehabilitation, or replacement.

BC and PURE are working with MPW to schedule excavation of selected critical locations along the pipeline to perform direct measurement of the remaining wall thickness for the condition assessment.

PICA’S BRACELET PROBE

The City of Minneapolis, Minnesota owns several large diameter steel water main river crossings. One of these is a 54-inch diameter main suspended under the 10th Avenue Bridge. The City had been concerned with the condition of the pipe wall, both internally and externally, due to corrosion and uncertainty over the condition of the internal wall lining systems. An in-line electromagnetic inspection tool capable of detecting small defects was not feasible due to the size of the pipeline and to the lack of access to the interior. PICA’s new external electromagnetic tool, the Bracelet Probe, was proposed for this inspection. This is a somewhat non-typical use of the tool since the full length of the river crossing, approximately 1,000 feet, is exposed with a suspended catwalk to provide access to the pipe exterior, as shown in Figure 3. The tool is more commonly used within an excavated pit up to about 12 feet in length. As shown in Figure 3, the exterior of the pipe and its bitumastic coating exhibited areas of deterioration due to weather and dripping of road salts from

Figure 3. View of 10th Ave. Bridge water main exterior and bracelet probe tool.

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the bridge. The Bracelet Probe tool is shown in Figure 3, as well. The tool uses a magnetic field to detect anomalies in the metal wall. As the tool is moved along the surface of the pipe, any changes in the pipe wall, such as pits, will appear as perturbations in the magnetic field. The magnetic field is monitored in real time by the equipment operator and any anomalies are marked on the wall surface.

Figure 4 provides a screen shot of the monitor during the calibration of the tool, prior to the inspection. A portion of the recording is expanded in Figure 5 to illustrate the impact of an anomaly in the pipe wall on the magnetic field recording. As with the SmartBall PWA, the Bracelet Probe tool is typically used as a screening

tool. Its advantage is that the tool immediately indicates areas of interest (magnetic field anomalies) in the field. These areas are marked by the operator as the inspection proceeds. The operator will then take direct wall thickness measurements at the indicated locations using ultrasonic tools.

The areas of external corrosion were positively detected by the Probe, providing assurance that it was yielding useable results. Areas of corrosion were identified on the interior of the pipe near the pipe supports, which indicated that at least portions of the cement mortar liner have failed. Once all the data has been collected and reviewed, it can be determined if additional invasive

inspection efforts are needed to make decisions on whether to repair, rehabilitate or replace sections of the main.

These tools extend our toolbox for inspecting ferrous pipelines, especially where the use of an in-line tool is not feasible either due to obstacles within the pipeline (certain types of valves, tees, etc.), lack of access to the interior, or economic reasons. Both tools are good screening tools that provide useful data on the location of anomalies within the pipe wall. Based on the results of the screening analysis, the investigator is able to select critical locations for direct measurement of remaining wall thickness using ultrasonics or other externally applied electromagnetic tools.

Figure 5. Expanded area of screen showing anomaly.

Figure 4. Screen shot of bracelet probe field monitor.





“Just bore it!” “You can easily micro-tunnel under

the stream.” “Let’s avoid the gravity sewer by

directional boring under the roadway.” If you’re a consultant, you’re probably

hearing more and more of these statements at meetings attended by regulatory personnel, clients, and other engineers. While trenchless methods have seen great advances in the last 20+ years, some decision makers may still be unsure which method is best for their particular project. As trenchless design professionals, we need to be sure our clients are fully informed of the practical aspects, limitations, and constraints of the specific types of trenchless installations. In many cases, proposing a trenchless method is on the right track but the specific method utilized should be weighed against other potential options.

This was certainly the case for one of my long-term projects, the Lake Marion Regional Water System (LMRWS). The LMRWS was conceived as a way to

bring a sustainable source and high-quality drinking water to the low country of South Carolina. The investment in infrastructure by the LMRWS was also conceived as a way to hopefully attract industry and growth while creating new jobs and opportunities along the I-26 and I-95 corridors.

One challenging section of the Lake Marion Regional Water System (LMRWS) expansion was the 16-inch diameter, six-mile long Harleyville Water Transmission Line extension. Installation of the Harleyville Water Transmission Line would require crossing the 8,500-foot wide Four Holes Swamp wetland that meanders its way through Orangeburg and Dorchester Counties and is a tributary drainage basin to the Edisto River. From the very onset of planning and preliminary design, the Four Holes Swamp crossing loomed as the major challenge of this next pipeline reach.

A portion of the Harleyville Water Transmission Line was proposed to extend along portions of Highway 453.

Highway 453 connects the towns of Holly Hill and Harleyville, serving primarily as a cut-through between Interstate 26 and Highway 176 and a major trucking access road for cement plants. Unfortunately, Four Holes Swamp drains through the middle of the route. The corridor proposed for the Harleyville Water Transmission Line encompassed existing electric transmission, high-pressure gas transmission, CSX railroad line, and Highway 453 all within a 200-foot-wide stretch that crosses the swamp. Within the corridor, Highway 453 is on an earthen embankment with three bridges that allow the swamp to drain southeast. To complicate things further, the surrounding property is owned by the Audubon Society.

While a 200-foot-wide corridor initially appeared like plenty of space for a 16-inch water main, research quickly proved otherwise. The eastern 75 feet were occupied by CSX railroad. Obtaining a parallel easement from CSX would be cost and time prohibitive. It was also not feasible to shut down traffic and put the water main under the pavement or in the immediate shoulder. Adjacent to the highway was the 20-foot-wide SCE&G gas line easement, and a good portion of the remainder of the space was occupied by high-voltage transmission lines and poles, with strict minimum separation requirements. Three corridors remained as suitable space: 15 feet of open space along the tree line, the 20-30 feet of space between the electric transmission lines and the gas easement, and the narrow roadway embankment. Figure 1 shows the special constraints within the corridor.

Initially, it was determined that the true distance across Four Holes Swamp would be approximately 8,500 linear feet (LF)

Plan B for HDD: Customizing a Challenging Installation

By Andrew S. Vane, P.E., Hazen and Sawyer

Figure 1: Construction corridor across Four Holes Swamp.




from dry ground to dry ground. Since US Army Corps of Engineers embraces horizontal directional drilling (HDD) as a preferred trenchless method for crossing wetlands, HDD was proposed as the primary method for trenchless installation for crossing the Four Holes Swamp.

When most people think of HDD, they think of the typical situation depicted in Figure 2, a compact piece of equipment requiring little working room or staging area that can directionally drill a pipe a thousand feet down the road. Since this type of buried telephone and fiber optic installation is very common in our neighborhoods, this usually becomes the frame of reference for the space requirements, equipment sizing, capability and lack of public nuisance, and disturbance related to HDD. If only it were that simple! So began the design challenge.

Using minimum 100-foot radius-per-inch diameter and a minimum depth of 50 feet to reduce the risk of frac-out, the alignment was set with plenty of space to set up the rig on the north side with ample space along the power line right of way on the south side of the swamp for stringing out the pipe for pullback.

Using ASTM F1962 (Standard Guide for Maxi-Horizontal Directional Drilling for Placement of Polyethylene Pipe) and ASCE Manual of Practice No. 108 as design guidelines, it was determined that the following parameters could be anticipated for a High Density Polyethylene (HDPE) pipe crossing of this magnitude.

HDD DESIGN CALCULATED PARAMETERS

Entry/Exit Angle 10 degrees

Material DR9 HDPE PE4710

Total Length 8,500 LF

Pull Strength 423,000 lbs

Tensile Stress 2,388 psi

Figure 2: A typical mini-HDD rig.

Figure 3: HDD rig staging area.





This information was calculated using a spreadsheet containing the ASTM F1962 design formulas and also using commercially licensed HDD design software. The maximum allowable short-term and maximum tensile strength for HDPE is approximately 1100 psi and 3500 psi, respectively. This pull would have exceeded the short-term allowable strength. In addition, the design guidelines generally recommend a safety factor of at least 2.0. In this case, the safety factor for maximum tensile strength is 1.46. It was determined that one single, long HDD would not be possible and would have a high risk of failure if it were attempted. What initially seemed like a great plan on paper proved unacceptable in reality.

The other crossing options that were considered included:1. Install ductile iron ball joint pipe and

drag across the swamp, open cutting via barge.

2. HDD the entire length using a 20” diameter steel pipe as a casing pipe.

3. Install one or more temporary ‘islands’ in the swamp and use these as a drill points to reduce the distance drilled and associated pull loads.

4. Install the pipe in the shoulder of Highway 453 and HDD the three creek channels at the bridges.

Throughout this process, Hazen and Sawyer consulted with utility contractors to receive feedback as to constructability and general cost considerations of these options.

Options 1 through 3 were determined to be non-viable due to high cost or permanent environmental impact. Option 4 was by no means ‘easy’ to design or construct, but proved the most beneficial to the budgeted funding, environment, property owners, and Corps wetlands permitting authorities. This option required continuous traffic control along Highway 453 during open-cut construction. In order to install the pipe at the horizontal directional drilling (HDD) locations and avoid the gas line right-of-way on the west side, it was determined that temporary fill areas would be required for staging the HDD rig, pit, and

Figure 4: Design of HDD staging area.

Figure 5: HDPE pipe after pullback.




mud recycler. The horizontal distance of the longest HDD was reduced from 8,500 LF to 1,134 LF with an anticipated pull of approximately 25,000 lbs. This not only reduced the size of the equipment but the footprint required. Each HDD staging area (seen in Figures 3 and 4) was designed to be 150 feet long by 20 feet wide with 1:1 sloped areas enveloped by silt fencing for erosion control. Sediment booms were placed across the channels at the bridges to further reduce the risk of sediment entering the swamp. A vertical radius of 1,600 feet for the 16” diameter DR9 DIPS High Density Polyethylene (HDPE) pipe was designed at each location to keep the anticipated pull loading required as low as possible.

The three HDD crossings measured 2,762 linear feet (LF) total and the HDD subcontractor indicated they had no issues with the installation or pullback - remarkable considering there was less than 15 feet of space for the pipe to be

drilled between the bridge abutments and the edge of the gas line easement. As shown in Figure 5, the water main was installed successfully within this narrow corridor.

Overall, the Harleyville Water Transmission Line project and the Lake Marion Regional Water System (LMRWS) expansion can be considered a success and will provide over 2 million gallons per day to Dorchester County, Berkeley County, and a new Volvo manufacturing facility. Also, the Trenchless method, Horizontal Directional Drilling (HDD), turned out to be the best method for crossing Four Holes Swamp, even if the design had to be changed from its original conception and scaled down.

As consultants, we have an opportunity to both listen to and inform our clients and the regulatory authorities using our expertise on the practical application of trenchless methods when applied to a specific project. It is our role

to ensure the correct application for a crossing is designed and constructible; and it is important as engineers that we educate and inform our clients about the limitations of new technologies as they are developed and implemented in the water and wastewater industry.

This project was designed by Hazen and Sawyer and constructed by Ruby-Collins, Smyrna GA with HDD crossings performed by Gator Boring, Pensacola FL. The project was bid and administered by the US Army Corps of Engineers Charleston office for Santee Cooper and the Lake Marion Regional Water Agency.

ABOUT THE AUTHOR

Andrew S. Vane, PE, a graduate of Clemson University with 23 years of experience, is an Associate with Hazen and Sawyer in Charlotte, NC. He has overseen design and construction of all 30+ miles of water mains of the Lake Marion Regional Water System.

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INTRODUCTION

In 2008, a roundtable discussion occurred at the offices of the Fayetteville Public Works Commission that involved various representatives from municipalities, material supply companies, and consulting firms. The topic was pressure pipe bursting, in particular for the rehabilitation of water distribution pipe. Presentations were offered, municipalities described their needs, and a solid exchange of information made the meeting a success. One attendee, Robbie Bald, water resources engineer with the City of Greensboro, took particular note of the benefits of using water pipe bursting for older, undersized cast iron mains. A year later, the first major effort in North Carolina to rehabilitate pressure pipe through pipe bursting was launched.

Since that time, no fewer than seven communities have utilized this trenchless technology to their advantage. They are Greensboro, Monroe, Charlotte, Ramseur, Roanoke Rapids, Reidsville, and Wilmington. In total, at least 90,000 linear feet of pressure pipe have been replaced by bursting, with some 20,000 feet more slated for 2015.

PROCUREMENT AND CONTRACTING

Pipe bursting pressure pipe lends itself to several methods of design and procurement. Greensboro had been rehabilitating gravity sewer lines through an annual contract with a local contractor, so the city simply expanded that include to its water lines. The contract renews annually with periodic open bids for qualified contractors. Reidsville Utility Director Kevin Eason chose to follow the same path as Greensboro and actually used the same contractor. Charlotte Water also used its

annual contract for procurement. Monroe, on the other hand, chose to self-perform the work, since the city already had crews capable of installing PVC water mains. The challenge for Russ Colbath, water resources director with the City of Monroe, was to develop the program for in-house equipment purchase, material selection, and training of crews; then, to sell that to the Council as a sound, economic, long-term investment.

The other three municipalities—Roanoke Rapids Sanitary District, Cape Fear Public Utility Authority (CFPUA) and the Town of Ramseur—chose the familiar design-bid-build method to procure the contractor and complete the work. All the methods were successful.

WHAT IS PRESSURE

PIPE BURSTING?

Pressure pipe bursting is not sewer bursting with pneumatic equipment. That process, while fine for manhole entry and retrieval, does not fare well when used for water pipe bursting. One reason is that commonly used product pipe, such as Fusible PVC® pipe or ductile iron pipe, does not lend itself to the severe impacts created by pneumatic equipment. Also, pneumatic tooling requires hoses (feeding air and oil to the hammer) that may contaminate the product pipe, causing future bacterial testing problems. For these reasons, static equipment is typically used.

The basic steps followed for water pipe bursting are:1. Set up a temporary bypass line in the

streets where the pipe will be burst. This is commonly 2-inch Yelomine PVC with locking couplings. Once disinfected,

the services are transferred to the temporary line. Meters may be connected, but it is not required.

2. Pits are dug for the machine location and pipe entry, and services are disconnected at the main.

3. Steel rods of quick/disconnect joints are fed through the host pipe into the pipe entry pipe. The distance typically burst is 300 feet to 700 feet, although much longer distances are possible. Up to 1,700 feet of pipe have been burst in Greensboro.

4. Tooling, consisting of cutting blades and an expander head, is connected to the rods. Product pipe is brought into place and also connected to the tooling for pullback.

5. The machine reverses direction and pulls the tooling into the host pipe, splitting and expanding the burst pipe into the surrounding soil. The annular space thus created allows the product pipe to follow the tooling back into the receiving pit. Pullback can take from less than an hour to a couple of hours.

6. After pressure testing and disinfection, the services are tapped into the new main and the flow transferred to the newly installed water main.

Static equipment is clean, which helps keep pipes clean. Also, it uses brute hydraulic force easily obtained from a power pack on the surface, which is transferred to a compact bursting machine in a small excavation. As shown in Figure 1, the basic setup includes a pulling pit where the machine is braced, a pipe entry pit at the proper slope to accommodate the product pipe, and rods threaded through the host pipe. These rods are attached to the tooling shown in Photo 1.

North Carolina Takes the Lead in Water Main and Force Main Pipe Bursting

By Gary Shepherd, Regional Manager, Underground Solutions




BENEFITS OF PRESSURE

PIPE BURSTING

Each of the end users listed previously in this article enjoyed a slightly different mix of benefits, but the common threads were cost savings, minimizing disruptions, and reducing the time needed to install new pipe through direct bury. In cases such as CFPUA’s Northeast Interceptor Rehabilitation in Wilmington, there was simply no room in the right of way to accept another 20-inch force main. Replacing pipe in the same trench, although possible, certainly would have created major traffic disruptions and lengthened the construction time and cost considerably.

PRODUCT PIPE

In general, a restrained pipe is necessary for bursting a water main or force main. Jointed and gasketed pipe such as restrained joint ductile iron pipe (RJDIP) and spline and groove PVC have been used. More common in North Carolina is butt fused polyvinyl chloride pipe made in conformance with AWWA C-900 and C-905. Of the 90,000 feet installed in North Carolina to date, most has been the butt fused PVC. The main advantage of a fused pipe is the uniform outside diameter, which has a standard DIP dimension. Also, connections and tapping can occur in the same fashion typical for bell and spigot PVC water pipe. Municipal maintenance crews are generally quite familiar with PVC.

The typical requirement to bed pipe when installing pipe in an open trench is not possible, or necessary, for pipe bursting. The external load is generally minimal due to arching. In addition, the pipe utilized has high stiffness. Thus, any concerns about over deflecting or over stressing the product pipe are misplaced.

THEIR STORIES

Greensboro began its pipe bursting pilot program in 2009, when the city burst 4-inch and 12-inch cast iron pipe, replacing it with 6-inch Fusible PVC® pipe and 12-inch ductile iron, respectively. KRG Utility has performed all the pipe bursting in Greensboro, most of which has been 4-inch and 6-inch upsized to 6-inch and 8-inch Fusible PVC® pipe and

Figure 1: Static pipe bursting setup.

Photo 1: Tooling cuts and bursts host pipe.

Photo 2: In Wilmington – Back end of TT Technologies 1900G with rod removal during pullback.





totaling around 50,000 feet. Greensboro’s Bald continues to budget for water pipe bursting, saying, “From a social impact the bursting process is much less disruptive and much quicker to install. With ongoing in-situ replacement, we also have the luxury of being very flexible in where we burst and can respond to our needs much quicker than [with] design-bid build-methods.”

The Reidsville story really piggybacks on Greensboro. Eason was familiar with the success of the Greensboro program and saw some areas in his city that required similar rehabilitation. “Due to the cost of the proposed work being within the range for informal construction contracts, Reidsville was able to utilize Greensboro’s contractor, KRG, who agreed to perform the Reidsville work using Greensboro’s unit prices for bursting 6-inch and 8-inch cast iron and replacing with the same size Fusible PVC® pipe. The first phase is complete and the second is under way,” said Eason.

Charlotte Water had an existing contract with Dallas One Construction & Development to upgrade water mains through dig and replace. In 2011, the utility directed Dallas One to replace an existing 3-inch cast iron main by bursting and pulling in a 6-inch Fusible PVC® pipe. The upsize was completed without incident under and adjacent to a sidewalk and specimen trees with cover of 3 feet or less.

The City of Monroe began investigating the pipe bursting method of renewal in 2012, and began its 10-year program in 2014, using city crews exclusively. Following the lead of Colorado-based Consolidated Mutual Water Company, which was the first major utility to pipe burst with its own staff, Monroe publicly bid and awarded the equipment contract to TT Technologies. TT and Consolidated helped train Monroe’s crews, and in that year, Monroe successfully replaced almost 10,000 feet of 6-inch and 8-inch pipe size on size with Fusible PVC® pipe. The city’s plan, according to Colbath, is to replace 16,000 feet of aging cast iron and galvanized steel water mains each year for 10 years, predominantly using the pipe bursting method.

The Town of Ramseur took a slightly different approach. When it needed a trenchless solution to replace some roughly 2,000 feet of 12-inch water main,

Photo 3: In Greensboro, long side and short side services tapped at same pit location.

Photo 5: In Roanoke Rapids, 6” DR18 Fusible PVC® pipe entering pit for pullback.

Photo 4: In Monroe – Pipe attached to expander head, in turn attached to cutting wheel tooling.




the officials asked The Wooten Company for assistance in evaluating the options. Wooten recommended pipe bursting with either Fusible PVC® pipe or RJDIP, and the town chose RJDIP due to its maintenance crews’ familiarity with the product. John Grey, project manager with The Wooten Company, designed the project and commented on its success: “The project cost was reduced by an estimated 10% due to using trenchless replacement. The largest expense that was avoided was flowable fill that was required by the NCDOT for the open excavations.”

Roanoke Rapids Sanitary District took a traditional path to its project. Hazen & Sawyer was familiar with the Greensboro work and suggested that the District might be better served to go trenchless rather than face the extra time and disruption of direct bury. At the time, permitting efforts required by NCDENR included a full review and approval from the Public Water Supply Section, but now the regulatory agency considers pipe-bursting size on size to be maintenance and no longer requires a permit. Once bid, Portland Utility Construction Company of Portland, Tennessee performed the work between July and December 2014. Included were 10,000 feet of 6-inch replacement with Fusible PVC® pipe, plus numerous valves, fittings, and hydrants. At the time of this writing, a second phase was scheduled to start in late summer of 2015.

The only departure from the story lies with CFPUA. The Northeast Interceptor project finished early this year was a pipe burst of a 20-inch ductile iron force main that had corroded and leaked in certain high points due to hydrogen sulfide generation and subsequent sulfuric acid production. Having tried pressure cured-in-place pipe (CIPP) in 2008, CFPUA chose to pipe burst with 20-inch Fusible PVC® pipe and 24-inch HDPE pipe, each having a nominal 20-inch inside diameter. The project length of more than 5,000 feet makes this trenchless project a first of its kind, due to the large diameter, long length, and the fact that the host pipe was ductile iron pipe. Kimley-Horn & Associates designed the project and State Utility of Monroe was the contractor. The team consisted of KRG Utility for the pipe bursting and Underground Solutions

of Poway, California for the 20-inch DR18 Fusible PVC® pipe and fusion services. The project went smoothly, with State Utility turning the project over to CFPUA in only five months. Craig Wilson, project manager for CFPUA, stated, “With narrow rights of way and other utilities adjacent to the Northeast Interceptor, a trenchless solution was the most economical and least invasive project approach.”

CONCLUSION

Although pipe bursting is a familiar term to most in the water industry, we tend to associate it with gravity sewers and pneumatic equipment. These days, though, the process most on the rise is pressure pipe bursting with static equipment. When it comes to pipe bursting, North Carolina is well ahead of many other states in the United States. For that, we can be proud, and the ratepayers and residents can be happy.

View a pipe bursting video online at https://youtu.be/JTBUwykj09M

ACKNOWLEDGEMENTS

Thanks to the following participants in the projects described in this article, and to those who reviewed this article:Robbie Bald, Water Resources Engineer

– City of Greensboro

Kevin Eason, Public Works Director – City of Reidsville

Russ Colbath, Water Resources Director – City of Monroe

Craig Wilson, Project Manager – Cape Fear Public Utility Authority

Chris Ford, Project Manager – Highfill Infrastructure Engineering, PC (formerly with Kimley-Horn & Associates)

Jeff Wing, Project Manager – Kimley-Horn & Associates

Todd Davis, Project Manager – Hazen & Sawyer

Michael Woodcock, Managing Member – Portland Utility Construction

Dan Brown, CEO – Roanoke Rapids Sanitary District

John Grey, Project Manager – The Wooten Company

Brian Hunter, Regional Manager – TT Technologies

ABOUT THE AUTHOR:

Gary Shepherd is a civil engineer with extensive utility sales and engineering experience in the eastern United States. As a part of the Underground Solutions team, he is responsible for trenchless technology activities involving Fusible PVC™ pipe in Virginia and the Carolinas.


https://youtu.be/JTBUwykj09M



With decades of experience in water and wastewater treatment,

Crowder provides the construction solutions that help bring clean

water to your communities.

Everyone needs clean water.

1111 Burma DriveApex, NC 27539919-367-2000

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ven if you’ve not attended WEFTEC or a specialty biosolids conference in the past few years, you are

probably aware of the hottest trend in biosolids management – thermal hydrolysis. A potentially game-changing process from Norway, thermal hydrolysis yields a high-quality biosolids final product while also improving digester performance and reusable digester gas production. Its North American debut was made to much acclaim at the world’s largest facility of its kind, DC Water’s 370 million gallons per day (mgd) Blue Plains Advanced Wastewater Treatment Plant (AWTP). But what you may not know is that thermal hydrolysis isn’t just for large plants – it is a scalable process that offers multiple benefits and is currently being considered for implementation at facilities across the United States, some as small as 10 mgd. As thermal hydrolysis starts to reach critical mass in North America, this article provides a primer for owners, operators, and maintenance professionals on the origin, operating theory, and key design considerations to determine if thermal hydrolysis is a good fit for your wastewater treatment facility.

What is Thermal Hydrolysis?Hydrolysis is the initial phase of the complex, multi-step process of digestion. In conventional anaerobic digestion, hydrolysis is generally accepted as the process’ rate-limiting step. In the hydrolysis process, external forces lyse or destroy the walls of bacteria cells. By accelerating hydrolysis, wastewater solids can be degraded more rapidly and more thoroughly, generating more digester gas and fewer solids for disposal. Various chemical, biological, and mechanical processes can be used to aid hydrolysis. Thermal hydrolysis is

of particular interest to the wastewater industry because it can result in adequate pathogen destruction to meet disposal regulations. In thermal hydrolysis, this is accomplished with a two-stage process in which high temperatures and pressures (generally on the order of 150 to 170 degrees Celsius and 80 to 100 psig, respectively) are used to achieve this cell destruction, releasing and solubilizing particulate organic material from bacteria and also further breaking down carbohydrates and long-chain fatty acids so they are more readily digestible. Thermal hydrolysis also significantly reduces the viscosity of the hydrolyzed solids, allowing significantly higher solids concentrations to be fed to the downstream digesters and reducing the mixing energy required for digestion.

Typical Thermal Hydrolysis Systems and ConfigurationsThermal hydrolysis processes are currently available in both sequential batch and continuous flow configurations, with the vast majority of existing and planned installations being of the sequential batch variety. Sequential batch systems manufactured by Cambi and Veolia - Cambi THP and Biothelys TM, shown in Figures 1 and 2, respectively – typically include the same general components. Stainless steel pressure vessel reactors allow for heating and pressurizing the solids with live steam and hold the mixture to meet the time and temperature thresholds required for cell lysis and pathogen destruction. After 20 to 30 minutes, the reactor is emptied and some of the

An Overview of Thermal Hydrolysis North America’s Hot New Biosolids TechnologyBy J. Brenan Buckley, P.E., BCEE, Brown and Caldwell

Sustainability Feature

E

FIGURE 1: Cambi’s Thermal Hydrolysis Process B6-3 Mark II system, installed at Thames Water’s Crawley Sewage Works in West Sussex, south of London, UK. The Mark II system represents the latest generation of the thermal hydrolysis process that Cambi will market in the United States. Completed in 2014, Crawley is a regional biosolids processing facility rated for 58 dry tons per day. Three reactor vessels are installed at Crawley.(photo by: Brenan Buckley, Brown and Caldwell)




steam is recycled to preheat incoming solids. Depending on the manufacturer, the reactor may be exposed to a violent flash depressurization to move the solids to a holding tank; some research has indicated that this rapid depressurization aids in hydrolysis and viscosity reduction, both of which have advantages in digester sizing as noted above. Hydrolyzed solids are then diluted with water, cooled to mesophilic temperature ranges, and then fed to the anaerobic digesters. It is preferable to set and forget the feed rates of both the thermal hydrolysis and digesters for optimal performance.

A continuous flow configuration that mixes solids and live steam in a piping system reactor at a controlled feed rate is also available from Kruger, Inc. Although most installed to date are pilot or demonstration-scale systems or temporary installations, one full-scale system having a biological treatment capacity of approximately 65 mgd is in operation in Lille, France. In the continuous flow process –known as Exelys ™ - solids and live steam are introduced into the reactor and mixed with a dynamic mixer. Reactor volume and throughput determine if retention time requirements are met, while probes determine compliance with temperature requirements. As with the sequential batch process, the hydrolyzed sludge is then diluted, cooled, and fed to the digesters. In some instances, the continuous flow configuration is installed with digestion upstream and downstream of the thermal hydrolysis to increase gas production and solids reduction.

Why Consider Thermal Hydrolysis?The benefits of using thermal hydrolysis in advance of anaerobic digestion, particularly on waste activated sludge (WAS), include greatly reduced digester volume requirements and capital costs, increased biogas production, and the generation of a reduced quantity of pathogen-free, low odor, readily-dewaterable final cake suitable for land application. These distinct advantages drove the development of a commercially-viable thermal hydrolysis process in Norway in the 1990s, where land for both plant expansions and

disposal were at a premium or unavailable and there was a growing desire to reduce energy demand and greenhouse gas emissions. Similar conditions saw the technology expand and mature into other portions of Europe in the 2000s. In particular, many private water companies in the United Kingdom, including Thames Water, United Utilities, and Yorkshire Water, have implemented thermal hydrolysis systems. In those cases, thermal hydrolysis has been a key factor in allowing the regionalization of biosolids processing at facilities where available digester capacity could be optimized, leading to increased efficiencies and economies of scale. There are currently sixteen thermal hydrolysis units in operation in the United Kingdom.

Thermal Hydrolysis in the United StatesSimilar project drivers are at work in the United States. Key project drivers for DC Water included significant space limitations at the Blue Plains AWTP, a desire to reduce the cost and environmental impacts for the energy demand related to disposal of biosolids, and the need for a more marketable biosolids product available for reuse to diverse outlets. At Blue Plains AWTP, DC Water was able to leverage the benefit of the higher solids throughput afforded by thermal hydrolysis to optimize the sizing of four new 3.8 million gallon anaerobic digesters to meet site constraints, reducing construction and long-term operating costs. Enhanced biogas production from Blue Plains’ new digesters will feed a combined heat-and-power facility that provides steam to the thermal hydrolysis process train and is expected to generate approximately 13 megawatts of electricity, reducing operating costs. Just as important, the final product will be a pathogen-free final cake, having in excess of 30% dry solids that meets US EPA 40 CFR Part 503 rules for a Class A biosolids product and allows for a wide range of land disposal options.

The San Francisco Public Utilities Commission is in the early stages of a thermal hydrolysis and digester improvement project at their Southeast Water Pollution Control Plant. The 57 mgd

facility that was constructed in the 1950s, manages 80% of the city’s biosolids, and is now surrounded with adjacent development, limiting expansion options. Many of the project drivers for DC Water are also applicable to the San Francisco project, particularly site constraints and a desire for a range of final product disposal options. The Hampton Roads Sanitation District in Virginia, the Trinity River Authority near Dallas, Texas, and the City of Franklin, Tennessee are all in various stages of thermal hydrolysis implementation projects.

Closer to home, the City of Raleigh is currently in the preliminary design phase of a new biosolids campus for the 75 mgd Neuse River Resource Recovery Facility. The Raleigh project will include pre-dewatering and screening; thermal hydrolysis; new anaerobic digesters; a fats, oil, and grease (FOG) receiving station; sidestream treatment to address high nutrient loadings from the new recycle streams; and a digester gas reuse solution. The gas reuse solution is expected to include some combination of steam generation to support the thermal hydrolysis process and either power generation or a biogas-derived alternative vehicle fuels processing, storage, and transport facility that could fuel the city’s bus fleet. Key project drivers for Raleigh include the substantial energy savings and greenhouse gas emission reductions that would be gained from mothballing their existing energy-intensive aerobic digesters, reduced construction costs for thermal hydrolysis-fed anaerobic digesters (optimized to take advantage of the beneficial properties of hydrolyzed solids), and a desire to convert their existing combination Class A and Class B land application program to a dedicated Class A program with multiple disposal pathways. Raleigh’s new bioenergy recovery program, being developed through a collaborative consulting partnership led by Brown and Caldwell and Hazen and Sawyer with support from Black and Veatch, is expected to be operational by 2019.

Key Design ConsiderationsThermal hydrolysis implementation projects are complex endeavors that will influence




the operation and performance of many processes at your wastewater treatment facility. A thermal hydrolysis process becomes the heart of your facility and its planned operation will dictate design conditions and the performance of both upstream and downstream processes. It will also require the development and mastery of new skills by your operators and maintenance professionals. Key design considerations such as those identified below can be case-specific and should be evaluated carefully by your operations and maintenance team, engineering consultants, and thermal hydrolysis vendor.

Sludge Screening – Grit screening to remove particles less than 5 millimeters (mm) is recommended by most vendors, in part due to the additional wear that grit under high pressures will place on system components including pipes, elbows, pressure vessels, pump stators, and other elements subject to wear. Screening also reduces the potential for grit accumulation in anaerobic digesters, which can require significant downtime to clean and is not a pleasant task. Further, screening to remove objectionable materials from your high-quality final biosolids product – such as plastics, hair, and other filamentous materials – assures that the product will meet customer expectations. Be prepared for additional sludge screening – your existing headworks screens may not be adequate.

Feedstock Preparation – Thermal hydrolysis systems prefer a steady-state feed rate that requires some sludge storage upstream to attenuate the variable loadings typical in a wastewater treatment facility. Thermal hydrolysis and your digesters will be continuously fed 24 hours per day, 365 days a year, with one exception as noted below. Feedstock is generally fed to the thermal hydrolysis system in the 15 to 20% solids range, and frequent field measurements are needed to determine this concentration for the appropriate addition of dilution water or even primary solids to meet this target. FOG can also be added to

the thermal hydrolysis system to boost digester gas production, but it must be pre-screened and pre-heated and is typically added downstream of the sludge storage noted above.

Thermal Hydrolysis Maintenance and Annual Inspections – The thermal hydrolysis reactors are pressure vessels that require annual inspections and certifications much like industrial steam boilers. The inspection of the high-pressure reactors must be performed by qualified staff or a third party possessing certifications recognized by the National Board of Boiler and Pressure Vessel Inspectors and commissioned by the North Carolina Department of Labor. Each pressure vessel must be taken offline to complete the inspection and any repairs. Depending on system configuration, this means that your thermal hydrolysis system could be offline for as much as a week or more if repairs are needed. Your operations team and engineer will need to consider provisions for storing or diverting sludge to another outlet while the thermal hydrolysis

system is offline. Because pathogen destruction occurs with thermal hydrolysis, sludge that has not been hydrolyzed cannot be introduced into the digesters or points downstream without contaminating the system.

Digestion and Digester Temperature Control – Hydrolyzed sludge leaves the thermal hydrolysis process at a temperature significantly higher than the target temperature for optimal mesophilic anaerobic digestion. Heat exchangers are included in the thermal hydrolysis package to provide adequate cooling, often using treated plant effluent as a source of cooling water. The volume of water required for the heat exchange to work properly is often substantial and can tax other plant process demands for recycled effluent. Cooled hydrolyzed sludge can lead to pumping and piping problems, especially if hydrolyzed sludge is allowed to sit in pipes for extended durations measured in hours, not days. Provisions are included in the design to drain sludge from post-process lines in the event of a


FIGURE 2: Veolia’s Biothelys Thermal Hydrolysis Process, installed at Thames Water’s Oxford Sewage Works near the Town of Oxford, UK. Oxford is also a regional biosolids processing facility rated for 60 dry tons per day. The plant is currently being operated by both Thames Water and Veolia staff prior to final acceptance. Three paired reactors, for a total of six, are installed at Oxford. (photo by: Michele Kline, Veolia/Kruger)




shutdown or failure, and the systems are placed in close proximity to the digesters to limit pumping challenges. Heat from the heat exchangers can be recovered or dissipated to the atmosphere, plant effluent, or other locations.

Thermal Hydrolysis Location – In addition to being in close proximity to the digesters, the thermal hydrolysis process will typically be located outside, exposed to the elements, for most installations in the United States. Units in the United Kingdom are also generally located outside, as are the sludge hoppers that normalize feed rates. Odors generated by the thermal hydrolysis process are pungent, but they are normally collected and routed to the digesters and exposure to the atmosphere is rare. There are situations where foul gas may be discharged from the system, such as when performing maintenance on the pressure vessels or in the event of an unplanned shutdown and emptying of the process piping. The sequential batch

process, particularly those with flash depressurizations, can be noisy when operating – and they operate continuously. For these reasons, siting should consider proximity to neighbors and noise abatement techniques, such as noise walls, where necessary.

Dewatering Recycle Characteristics – High ammonia concentrations can be expected in recycle streams from the thermal hydrolysis and anaerobic digestion process. The actual concentration will be a function of the feedstock, particularly the WAS characteristics and WAS mass percentage. At wastewater treatment facilities having or expecting low nitrogen limits, treatment of the recycle stream may be required. This will be particularly important if the facility is intended as a regional biosolids processing facility accepting sludge from other facilities or communities. hermal hydrolysis processes can also introduce additional recalcitrant dissolved organic nitrogen (r-DON) into the


recycle stream. In addition to increasing the nitrogen load, r-DON can provide a tea-coloration to the recycle stream effluent. his may impact UV system performance if used at the facility for disinfection. When the recycle stream is blended with plant effluent for discharge, this coloration is typically not noticeable.

ConclusionThermal hydrolysis is rapidly becoming an established, viable method for achieving biosolids management efficiencies in the United States, just as it has in parts of Europe since the mid-1990s. At least five additional thermal hydrolysis systems, in addition to the system installed at DC Water’s Blue Plains AWTF, are currently in various stages of design and will be operational in the next five to seven years. The installation of thermal hydrolysis at wastewater treatment facilities with existing anaerobic digesters can allow for system expansion with no additional digester volume. It can also help mitigate site constraints and increase digester gas production available for beneficial use to help reduce greenhouse gas emissions and energy costs, all while producing a high-quality Class A biosolids product suitable for multiple disposal outlets. Similar opportunities and advantages exist to optimize the sizing of new biosolids management facilities. The thermal hydrolysis process has the potential to impact many aspects of your wastewater treatment facility. Careful coordination and consideration by your operators, maintenance professionals, engineers, and thermal hydrolysis equipment vendor is critical to the delivery of a successful project.

About the AuthorJ. Brenan Buckley, P.E., BCEE is Brown and Caldwell’s (BC’s) Raleigh Office Manager and Project Manager for BC’s portion of the City of Raleigh’s Bioenergy Recovery Program, currently under preliminary design for the Neuse River Resource Recovery Facility. BC’s responsibilities on the project include pre-dewatering, sludge screening, thermal hydrolysis, and anaerobic digestion.


http://www.forceflow.com

Right Data + Right Results + Right Now




In 1999 after Hurricane Mitch, Marta Lidia Beteta Urizar of Guatemala was a 31-year old mother who found her family homeless from the storm’s devastation. Others in her community of Santa Rosa Chujuyub lost family and friends along with their homes. With conviction, Doña Marta moved her family to Chicorral in Santa Cruz del Quiché for a fresh start. But the hardships continued in their new town, as her family struggled to make new friends and worked to build a house on land of their own.

The town was also struggling. Chicorral needed water. A cistern truck would deliver water, but it was expensive and remote, requiring women to walk 25 minutes each way. It was dangerous to go alone, and many became sick in the winter months from long hours of being wet. Chicorral needed change in a big way.

COMING TOGETHER: How One Guatemala Community Invested in a Future with WaterBy Water For People

In 2013, residents were informed at a community meeting that a new program would soon bring access to water to each of their homes. While there was residual distrust because of previous project failures, Marta and her community of Chicorral knew they needed to try again.

So Chicorral did. The community purchased land and, with the support of Water For People, drilled a well, installed an electric pump, and distributed a network of pipes to bring the water to each of the 200 families. They also held training sessions to support long-term maintenance and governance of the system, hired a plumber, and added household water meters to track usage and assess fees equitably across the community. “I did not miss a meeting,” said Doña Marta. “I learned very much; they taught us not to burn garbage but to bury it, to keep everything clean, the sink and our storage containers, and to not waste water, and to boil the water we consume to not get a sick stomach.”

All residents of Chicorral invested in the development of securing safe accessible water for the community. They also contributed a great amount of individual effort to construct the system. The community of Chicorral is in charge of their future. “We are now responsible for the project,” said Doña Marta. “We pay our tariffs and go to meetings so we can be involved in everything that needs to be done so the project will always function well.” Water For People and the local government simply provided some fire to an engine that was already running.

Today, Doña Marta and the other women in her community do not walk for water; they have it in their homes

whenever they need it. While life has thrown a few challenges her way, each time Doña Marta has figured out how to tackle them and create her own success. Doña Marta, like all those around her in Chicorral, is changing the future for herself and for the benefit of Everyone in their community and the entire district of Santa Cruz del Quiche, Forever.

UPDATE FROM THE WATER FOR PEOPLE HEADQUARTERSIn Water For People headquarter staffing news, CEO Ned Breslin left his post after nine years. The organization shared the following statement after his departure: “We will miss the strength, passion, and creativity that Ned Breslin brought to Water For People and to the Everyone Forever model. The enthusiasm for this approach is clear within the sector, and we’re seeing progress every day. He created a legacy to be proud of and we will honor him by continuing to drive his vision – a world without water poverty. We wish him well and know that in his next role he will bring the same kind of strong leadership and vision that enabled Water For People to provide safe and continuous access to water to thousands of people in underdeveloped areas across the globe.”

UPDATE FROM THE WATER FOR PEOPLE COMMITTEEEarlier this spring, the NC AWWA-WEA Water For People Committee hosted the 6th annual 5k in Charlotte and the 2nd annual 5k in Raleigh. The proceeds from both races exceeded $10,000 and the total number of registrants was more


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than 180. Congratulations to Chad Hearn and Carmen Jarrell for winning the overall men’s and women’s race in Charlotte, and to Rob McHadry and Allison Reinert for winning the overall men’s and women’s race in Raleigh. The NC Water For People Committee would like to thank all of the sponsors and supporters for their contributions and for making the events this year the most successful Water For People 5ks to date. The committee plans to continue hosting the 5k races each year to not only continue raising funds

for Water For People, but to also spread awareness of Water For People and its mission for clean water and sanitation around the world. The atmosphere at both races was extremely positive and we look forward to planning the events again next year.

For more information or to volunteer with the 5k planning committee for the 2016 Water For People 5ks, please contact Keller Schnier ([email protected]), Nick Dierkes ([email protected]), or Lamya King ([email protected]).

Water For People is an international nonprofit organization dedicated to providing access to improved water and sanitation systems and services in developing countries. By working with local governments, the private sector, and partners, Water For People ensures that everyone in a specific region has these basic needs met forever. This innovative approach reaches every family, every school, and every clinic, catalyzing transformative change for better health and economic development to occur.






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2015 Scholarship Recipients

The NC Safe Water Endowment Program (NCSWEP) continues to help produce a sustained, educated and trained workforce through the following primary activities:• Providing annual scholarships to university

and community college students• Providing educational awards for

teachers or programs that increase safe water awareness

• Encouraging more students to consider a career in a water profession through promoting greater involvement in schools by water professionals

• Promoting public safe water educationIn the five years since NCSWEP’s inception, the endowment has grown to more than $389,000 pledged and nearly $341,000 in investment value. In 2015, nine students received awards totaling $12,500 to help further their education, and two educators received another $2,000 to help promote environmental awareness. Nine of the student scholarships are eligible for annual renewal as long as the recipient continues to satisfy the qualifying criteria. Learn more about these award winners below.

For 2016, the NC AWWA-WEA Board of Trustees has approved the award of $13,000 through the NCSWEP. Applications for the 2016 awards must be received by March 24, 2016 and the applications are now available through the following website: http://www.ncsafewater.org/?page=Scholarships

As we approach year-end, please consider making a monetary gift to NCSWEP that is meaningful to you. Making a donation has gotten easier. It only takes a few minutes to donate online at www.ncsafewater.org. If every member of NC AWWA-WEA gave $10 annually, we could endow a new $1,000 award or add $1,000 in value to an existing award each year. For the price of two mocha lattes or two burgers per year, our members

can help to build a sustained water industry work force. Can you think of a better professional legacy? For more information, or to obtain an award application, visit our website or contact the Endowment Committee chair, Carlos Norris, Crowder Construction (919) 367-2000 or [email protected].

Carol Bond Fund Community College Scholarship

TEAL SADLERPamlico Community College, Environmental Science$1,000“I am deeply and genuinely

honored by the committee’s decision to help support my efforts towards [my chosen] career path… I am committed to pursuing more education to help me with my personal goal of promoting environmental awareness in my native Pamlico County. I am passionate about helping others and would love to motivate people to be more conscious of the impact that we have on the future of our planet. I am proud to be on this career path and this scholarship is a blessing to me.”

Carol Bond Fund/Lynn & Lars Balck Water Environment Stewardship Fund/Rivers & Associates Clean Water Education Fund

HALEY BRINKLEYNC State University, Environmental Engineering$2,000“… I have always loved visiting the lake, ocean,

and playing in the creek. As I grew older, I began to realize that the sources of

my enjoyment were constantly being threatened by different pollutants. I am thoroughly excited about discovering new ways to preserve our natural resources. When I entered college, I knew that I wanted to study our environment, but I also wanted to be involved in innovation for the future. I am currently on track to do both, in the Environmental Engineering program at NC State University. With the help of the NC AWWA-WEA, I look forward to continue learning for many years.”

Environmental Manufacturer’s Representative Scholarship Fund

ERIC POLLINC State University, Environmental Engineering and Spanish$1,000“Winning this scholarship

is a great opportunity for me to learn more about environmental manufacturer’s representative firms and the water industry. I hope to explore how industry utilizes and affects water and its reuse. My goal is to gain knowledge of disasters dealing with water due to my experience of seeing petroleum pollution of the waters in Ecuador. I hope to be able to research a possible method of purifying water polluted by environmental catastrophes.”

Frank & Susan Stephenson Water Environmental Scholarship Fund

MEREDITH BULLARDNC State University, Civil Engineering$1,000“I am humbled by and grateful to receive this

award for a second year. It allows me to continue to pursue my degree in Civil

Endowment Update


http://www.ncsafewater.org/?page=Scholarships





Engineering at NC State. I am confident that the engineering skills I will gain will equip me to benefit society, protect and improve the quality of the environment, and meet a basic human need. I plan to graduate with a degree in Civil Engineering with a concentration in Water Resources and want to use my degree to make a difference both locally and globally. I am thankful for the opportunities that I have had so far to learn more about this critical area, and I look forward to continuing my education.”

Les & Elaine Hall Water Environmental Stewardship Fund

CALEB BYNUMNC State University, Civil Engineering$1,000“I decided to pursue a concentration in water

resources because of the vital role that water plays in today’s society. I was fortunate to be able to participate in a summer internship with the City of Gastonia. This internship has opened my eyes to how versatile the field of water resources can be and has shown me its true importance. It can sometimes be taken for granted that water will always come out of your kitchen faucet. However, I have been able to see what it takes to make it happen and have developed a new appreciation for municipal water systems.”

NC Safewater FundALLEN LEE DOWLERCoastal Carolina Community College Graduate University of North Carolina

– Wilmington, Marine Biology $1,500“I embrace an enormous passion for studying Marine Biology. This topic of interest originated in my early years as I sat on the dock of my home. Spotting a small school of brackish mud minnows, I contemplated the purpose of a minuscule fish in a vast ocean. A spark was lit inside my soul that has directed my lifelong goal of studying our remarkable aquatic wildlife. My long-term goal of becoming a marine biology conservationist is to educate, advocate,

and take action to ensure the future of marine life everywhere. If more people were aware of the effects of our decisions, I believe the marine ecosystem would be a more sustainable environment. If I am to educate anyone, or help better our environment as a whole, I must first obtain a complete understanding of all subjects surrounding conservation.”

Raftelis Financial Consultants Environmental Finance and Management Scholarship

MARIA TCHAMKINADuke University, Nicholas School of the Environment, Master of Environmental Management$1,000

Concentrating in Water Resources Management, Ms. Tchamkina intends to pursue a career in water planning, specifically in managing the risk that climate change poses to water supply. She is honored to receive this year’s Raftelis Financial Consultants Environmental Finance and Management Scholarship Fund award from NC AWWA-WEA. This scholarship, besides providing meaningful financial support, recognizes the growing need for management professionals – in addition to engineering, science, and legal professionals – to serve the water industry.

Maria returned to the academic setting after nine years of work experience since receiving her undergraduate degree from Boston University. Prior to starting at Duke, she enjoyed a career in the green building industry, providing energy and water efficiency services to affordable housing in New York City. She hopes to use her diverse background, experience in working with private, non-profit, and government entities, and interdisciplinary education to help address the unprecedented water resources challenges of the 21st century.

Raftelis Foundation Elementary Education Scholarship

SHONNA GARRELLTabor City Elementary School $1,000For six years, the science teacher has worked diligently

to explain the effects of water pollution on ecosystems and living organisms to underprivileged children in a rural community

with limited financial resources. Thanks to this grant, over 400 students will have access to hands-on learning, using microscopes and invertebrate kits to assess human impact on water quality.

KEISHA LIPECity of Asheville$1,000“Receiving the Raftelis Foundation Elementary Education Scholarship

is an honor. This will significantly help in purchasing educational material to be used with the City of Asheville, Stormwater Services education outreach program. We are sincerely committed to continue doing our part in teaching children how they can help in keeping our water safe and clean.”

Safewater Fund/ GHD Clean Water Fund

ZACHARY HOPKINSNC State University$2,000“The awarding of this scholarship means more than I can describe. It

reminds me that others have faith in my current and future plans to help the environmental sector. I am further encouraged by this award to make sure I do everything in my power to help bring knowledge of safe water to the public and better educate the next generation on what safe water truly means.”

LINDSAY MATTHYUniversity of North Carolina – Charlotte, Civil & Environmental Engineering $2,000

“Since I was young, I have had an interest in water and the water treatment process. It was a dream come true last year when I was accepted into UNC Charlotte’s Civil/Environmental Engineering graduate program. This program is providing me with the necessary resources to develop a career in water resources engineering. Winning this scholarship is exciting as it is helping me to continue my research and studies in the field of drinking water treatment. In the future, I hope to help provide all people with safe and reliable drinking water. I am very much honored to be the recipient of the NC Safewater Fund/GHD Clean Water Fund.”


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CERTIFICATION

CORNER

CERTIFICATION

CORNER

MAINTENANCE TECHNOLOGIST QUESTIONS

Questions provided by the NC AWWA-WEA Operations & Maintenance Committee

1. If a water tank is filled with water to a height of 40 feet and the tank is 20 feet in diameter, what would be the pressure at the base of the tank, in pounds per square inch (psi)?a) 17.32 b) 62.4 c) 14.4 d) 19.25

2. The MCL for arsenic isa) 0.05 mg/l b) 0.003 mg/l c) 0.10 mg/l d) 0.002 mg/l

3. Fusible plugs on chlorine cylinders are designed to melt ata) 180 degrees F b) 100 degrees F c) 135 degrees F d) 158 degrees F

4. What is the chemical representation of the Langelier Index?a) pH-pHs b) pHs-log(Ca) c) pHs-pH d) log(Ca)-log(Alky)

5. A turbine pump set at a rate of 500 gpm is pumping water through a 6-inch pipe. How fast is the water traveling?a) 0.168 fps b) 5.68 fps c) 28.3 fps d) 4.78 fps

Answers:1. a) 17.32

2. c) 0.10 mg/l

3. d) 158 degrees F

4. a) pH-pHs

5. b) 5.68 fps

WASTEWATER CERTIFICATION QUESTIONS

Questions provided by the NC AWWA-WEA Wastewater Board of Education and Examiners

1. What does the hydraulic jetter hose outer sheath color signify?a) hose manufacture b) type of liquid that is been transportedc) hose pressure rating d) the diameter of the hose

2. What does hydraulic jetter hose inner color signify?a) hose manufacture b) type of liquid that is been transportedc) hose pressure rating d) the diameter of the hose

3. When designing a public gravity sewer to convey wastewater. What is the minimum pipe diameter that can be used?a) 6-inch b) 4-inch c) 8-inch d) 12-inch

4. When performing a leakage test the leakage exfiltration or infiltration shall not exceed __________ gallons per inch of pipe diameter per mile per day for any section of the system.a) 50 b) 100 c) 10 d) 1000

5. New manhole construction the access diameter shall be at a minimum of _________.a) 2 feet b) 36 inches c) 1.5 feet d) 22 inches

Answers:1. c) Wastewater Collection System by Michael Parcher Table 5.4.

2. a) Wastewater Collection System by Michael Parcher Table 5.3.

3. c) 15A NCAC 2T Regulations Min Design.

4. b) 15A NCAC 2T Regulations Min Design.

5. d) 15A NCAC 2T Regulations Min Design.



WATER CERTIFICATION QUESTIONS

Questions provided by the NC AWWA-WEA Water Board of Education and Examiners

1. For an assembly to be approved, a backflow preventer must:a) be inline testable and repairable b) have OS&Y gate valves c) be accessible d) be visible

2. Meter sizes up to 1-inch usually have screw-type connections, whereas larger meters usually have ______ connections.a) mechanical joint b) flanged c) coupling d) yoke

3. Using a service clamp, when making a tap, eliminates the chance of the pipe ________________.a) bending b) splitting c) straightening d) clogging

4. SCADA subsystems consist of: a) RTUs b) communications c) master station d) all of the above

Answers:1. a) Source: Backflow Prevention Theory and Practice, 2nd Ed., Chapter 5, p. 83.

2. b) Source: AWWA, Principles & Practices of Water Supply Operations, Water Transmission & Distribution, 4th Ed., p. 250.

3. b) Source: AWWA, Principles & Practices of Water Supply Operations, Water Transmission & Distribution, 4th Ed., p. 421.

4. d) Source: AWWA, Principles & Practices of Water Supply Operations, Water Transmission & Distribution,4th Ed., p.235.

CERTIFICATION INFORMATION

NC Board of Examiners for Engineers & Surveyors919-791-2000 www.ncbels.org

Exam Date: October 30, 2015Responsible for Professional Engineers and Professional Surveyors

NC Water Treatment Facility Operators Certification Board919-707-9040 http://www.ncwater.org/pws/

Exam Date: 10/29/15Responsible for Drinking Water Certifications (Surface, Well, Distribution, & Backflow/Cross-Connection)

Water Pollution Control System Operators Certification Commission919-807-6353 http://portal.ncdenr.org/web/wq/admin/tacu

Exam Date: 12/10/15Responsible for Wastewater Certifications (Animal Waste, Biological WW, Physical/Chemical, Land Application, Spray Irrigation, Collections, Subsurface, and OIT)

If you have any questions regarding operator/engineering certification and exams, please contact the appropriate agency.

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QuestionThank you to everyone who has participated and submitted questions. The following question was submitted online and will be answered in the Winter 2016 issue of NC Currents. We are currently looking for your thoughts on the answer to this question.

What issues should be considered when selecting the best chemical treatments for water?

This section of NC Currents serves as a forum for operations and maintenance workers to seek answers and solutions to problems and challenges through the insights and experiences of fellow operations-maintenance professionals. Operations-maintenance workers at all levels are encouraged to submit questions or respond to questions printed in this section. Questions and answers can be submitted online at www.ncsafewater.org or emailed to Nicole Banks at [email protected]. Everyone who submits a question or an answer will be entered into a drawing for a $50 gift card!

Answer

Thank you to everyone who responded with answers to the following questions. A summary of the responses will appear in the Winter 2016 issue of NC Currents.

What are the advantages and disadvantages to the privatization of a water or wastewater system?What are some common distribution system pipe materials?

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Welcome New Members!The following people became members of NC AWWA-WEA in April, May, and June of 2015 by joining AWWA or WEF and choosing NC as their home state or as an additional membership state, or by joining at the state level with a NC SLAM membership. We welcome these professionals to NC AWWA-WEA and look forward to seeing them at future events and working with them on various projects and committees.

For information on how to join, and the membership options available, please visit www.ncsafewater.org/?page=Membership. Most of NC AWWA-WEA’s work is carried out through committees. To learn more about each committee review the list of active committees at www.ncsafewater.org/?page=Committees. To express your interest in learning more about a committee, contact the committee chair directly, contact the NC AWWA-WEA office, or complete the online volunteer form.

American Water Works Association (AWWA)Austin Alexander, Xylem, Inc.Rachel Bean, Eno Scientific LLCJames Blake, Durham Department

of Water ManagementMarianna Boucher, McKim & CreedMichele Burton, City of RaleighDavid Cadman, City of RaleighDiane Cooper, City of RaleighMarla Dalton, City of RaleighJohn Dawson, MembranaHenry Eudy, Charlotte WaterJennifer Frost, Charlotte WaterAnthony Futrell, City of JacksonvilleKori Garrett, City of RaleighGreg Hall, City of High PointLeigh Ann Hammerbacher, City of RaleighElizabeth Hollier, Mecklenburg CountyAndy Honeycutt, MetersysEileen JohnstoneGigi Karmous-Edwards, FathomAubrey Lofton, Union CountyChristian McGarrigleDon McMullen, Jr., City of GoldsboroLori Montgomery, City of DurhamJessey Newman, City of RaleighGary NorrisMike Orbon, Wake County

Environmental Services DepartmentCaroline Potter, XylemGreg Purcell, City of ReidsvilleBarney Rogers, Edens Land CorpTeal SadlerMike Swedick, Fortiline Water WorksBrandon Thomas, Edens Land CorpDanny Thompson, Davidson Water Inc.Marco Varela, CITI LLCDustin Wagner, State Utility ContractorsDNV GL (Organization Member)Eno Scientific (Organization Member)FacilityDude (Organization Member)Town of Ayden (Organization Member)

Water Environment Federation (WEF)Will AllenAmy Aycock, Cape Fear Utility AuthorityLucas Cobb,

Garney Construction CompanyBrent Detwiler, City of HendersonvilleDerek Edge, ARCADISBradley Flynt, City of GreensboroLorenzo Halloway, City of RaleighKent Harrell,

Cape Fear Public Utility AuthorityJimmy Holland, WK DicksonZachary KemakCorey King,

Kimley-Horn and Associates Inc.Jason Lewandowski, O’Brien & GereSteve Macomber, Huber Technology Inc.Jerry Pierce,

Brunswick County Public UtilitiesKaren Ray, City of RaleighHenk-Jan van Ettekoven,

Huber Technology Inc.Rosheil WaldenJoseph Wilson, Charlotte WaterChristopher Worthy, City of RaleighWilliam Young

NC SLAMThomas Aldridge, City of BrevardJacob Allen, City of BurlingtonAnthony Allman, City of ConcordTyrone Alston, City of RaleighBrandon Anderson,

Union County Public WorksChristopher Avery, City of GoldsboroMatthew Bailey,

Johnston County Public UtilitiesMichael Brantley, Union CountyTravis Butcher, Town of ElkinJerry Byerly, City of StatesvilleJacqueline Cantrell, City of GreensboroJoshua Cholula, City of RaleighMichael Coats, Union County Public Works

Thaddeus Cohen, Carolina Water Service Inc.

Perry Combes, PTcombes Inc.Daniel Craig, Town of CaryTimothy Cullum,

M.B. Kahn Construction Co.Chase Dillard, Town of BooneDavid DovellRyan Enoch, Duke Energy ProgressMark Essenmacher, City of AshevilleJeffrey Ford, City of AshevilleGarrett Gilbert, City of NewtonAlan Grady, jr., City of GoldsboroJordan Greenlee, City of AlbemarleChristopher Hall, City of BrevardDarrell HobbsSamuel Hollister, City of AshevilleJoshua Icard, City of HickoryMatthew Kouns, City of AshevillePaul Kuerbitz, City of DurhamRyan LocklearJohn Miller, ChemtradeJason Morris,

Northampton County Public WorksMichael Ping, Heyward IncorporatedStephen Preul, KACE EnvironmentalMax Price, Union County Public WorksMatthew Reid, City of BurlingtonDonald Roberts, City of BrevardCourtney Sanders, City of RaleighDerrick Smith, Duke Energy ProgressRobert Smith, City of MonroeJames Stegall, Charlotte WaterGraham Strother, Town of Morehead CityMatthew Tuck, City of BurlingtonHiram TuftDwight Tyndall, City of GoldsboroJerod Walker, City of AshevilleJoseph Webb, City of Winston-SalemHoward Wilkins, Novozymes North AmericaPerry Wylie, City of Raleigh


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http://www.ncsafewater.org/?page=Committees


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News and Notes

Public EducationCommittee Activities

The NC AWWA-WEA Public Education Committee (PEC) has been busy through the spring and summer, with more activities planned in the fall.

In May, committee members assisted with the student poster contest in Durham and Greensboro. Kindergarten through eighth grade students created posters related to this year’s topic, ‘Be a wise water saver,’ and posters were judged with prizes being awarded for first, second, and third place in three age groups.

Kindergarten – 2nd Grade1st place: Kiyahna Mills2nd place: Gay Do3rd place: Stesha Davis

3rd Grade – 5th Grade1st place: Faith Hanson, Durham Academy2nd place: Teddy Wallen, Durham Academy3rd place: Omar Ramos Espinoza,

Holt Elementary Language Academy - Durham

6th Grade – 8th Grade1st place: Starr Matthews,

Voyager Academy - Durham

2nd place: Luke Cunningham, Voyager Academy - Durham

3rd place: Bel Orinda, Voyager Academy - Durham

PEC members also attended elementary, middle, and high school science fairs across the state and awarded prizes at the regional and state levels for projects related to water and the water environment. From the projects reviewed the PEC selected Vibha Puri from the North Carolina School of Science and Math for her project Enhanced Biosorption of Hexavalent Chromium in Monoionic Solution by Chemically Treated Green Algae.

In October and November, the committee will be hosting a Model Water Tower competition in Charlotte and Raleigh.

New Mentoring Program

In 2014, the NC AWWA-WEA State Board of Trustees, realizing the need to identify and develop future leaders, approved the formation of a task force to develop a leadership/mentoring program within NC AWWA-WEA. The goal of the

Leadership Development program is to enhance member benefits, sustain strong leadership of NC AWWA-WEA, and expand networking opportunities for participants through a structured program.

The program is focused on identifying members who are already exhibiting leadership potential through higher levels of activity within NC AWWA-WEA, such as being a current or past chair or vice-chair (an officer) of a committee. Mentees gain from this experience a greater understanding of the history and structure of NC AWWA-WEA leadership, how the Board of Trustees operates and makes decisions, and what it means to be a leader in NC AWWA-WEA. Mentors are all established leaders of NC AWWA-WEA who have served on the Board of Trustees at least once.

The first year of the program, 2014-2015, has been a pilot program with a few hand-selected mentor-mentee pairs to start the program. These first pairs are the following (mentor name followed by mentee name): TJ Lynch and Tony Mencome, Barry Gullet and Tony Martin, Crystal Broadbent and Derek Dussek,

3rd Grade – 5th Grade1st place:

Faith Hanson

3rd Grade – 5th Grade3rd place:

Omar Ramos Espinoza

6th Grade – 8th Grade1st place:

Starr Matthews

6th Grade – 8th Grade2nd place:

Luke Cunningham

6th Grade – 8th Grade3rd place:Bel Orinda




News and Notes

Leslie Jones and Tom Bach, Robert Walters and Courtney Driver, and John McLaughlin and Nick Dierkes.

If you are interested in participating in the Leadership Development Program, more information is available at www.ncsafewater.org.

NC WEA Award WinnersWEF Fair Distinguished Engineering Educator MedalNC AWWA-WEA is pleased to announce Dr. Francis de los Reyes as the 2015 recipient of the WEF Fair Distinguished Engineering Educator Medal. This award “…recognizes accomplishments in the education and development of future engineers. Honors Gordon Maskew Fair, a professor of sanitary engineering at Harvard University, [who] imparted to his students a desire for environmental harmony and taught them to use their engineering skills toward the realization of that end. Dr. Fair’s insight into the capabilities and limitations of the field of sanitary engineering inspired research and investigation into emerging areas of concern. This medal commemorates Dr. Fair’s contributions and likewise the contributions of his fellow educators.” (Award description from www.wef.org.)

Dr. de los Reyes is a Professor of Civil, Construction, and Environmental Engineering, Associate Faculty of Microbiology, and Training Faculty of Biotechnology at North Carolina State University. He has developed an outstanding and internationally recognized program of basic research, technology development, and training in wastewater treatment, microbial ecology, and

sanitation in developing countries. He has been active in teaching, research, and extension service not only at the state and national level, but has done internationally recognized work in several countries.

Dr. de los Reyes is recognized as a wastewater treatment expert and has developed collaborative relationships with utilities and municipalities throughout North Carolina. He is an active member of NC AWWA-WEA, serving annually since 2005 as an instructor for the NC AWWA-WEA Biological Treatment Operators’ School, organizing several workshops on microscopy, serving as speaker for the Laboratory Technicians, and as an invited speaker for specialty seminars, and NC AWWA-WEA conferences.

WEF Gascoigne Wastewater Treatment Plant Operational Improvement MedalCongratulations to Jackie Jarrell (Charlotte Water), Darrell DeWitt (Charlotte Water) and David L. Wagoner (CDM Smith) for receiving the WEF Gascoigne Wastewater Treatment Plant Operational Improvement Medal for their paper Finding the Right System Balance.

The nominated article describes a potential solution to a problem experienced at many operating wastewater facilities, minimizing nocardia growth while maintaining nitrification. Although the specific solution may not be universally applicable, the problem solving procedure used would be cost effective and appropriate for application at most Water Resource Recovery Facilities (WRRF). The article details how the staff of the Charlotte Water Mallard Creek WRRF

used a hands-on operations approach to evaluate the issues of foaming and nitrification performance using existing plant data and installed instrumentation. Analyzing past plant data during upset periods identified needs for further data, which were implemented using existing instrumentation. The additional data were then analyzed to develop operating theories that would minimize nocardia growth while still maintaining a nitrified plant effluent. The operating theories were then implemented in the full-scale facility to determine which were viable. Viable instrumentation would be needed, if any, to facilitate plant operating procedures for the long term.

Condolences

NC AWWA-WEA member Coleman Keeter passed away on July 20, 2015 at Hospice of Wendover. Mr. Keeter was a former City of Gastonia employee who most recently served as the Executive Director of the Water and Sewer Authority of Cabarrus County.

Congratulations

Congratulations to LaVerene and Brandon Garner on the birth of their daughter, Ellery LaVerene Garner on April 2, 2015. Ellery was 6 pounds 15.5 ounces and 21 inches long at birth.

News from GHD…

GHD and CRA are now one!The merger between GHD and Conestoga Rovers & Associates (CRA) is complete! As of July 1, 2015, they are operating as one unified company under the name of GHD.

The merged business has 4,000 people in North America and 8,500 globally – meaning customers have access to their engineering, environmental consulting, and construction services around the world.



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News and Notes

Customers can still count on the same project team members they already know and trust to support their project needs. The merger does not impact the approach they use to service projects.

You can learn more about the merger at www.ghd.com/cra or contact them at [email protected] to learn about our expanded team and new services.

GHD Welcomes Jason Marshall to their Charlotte, NC office effective May 18, 2015Jason brings more than 15 years’ experience in water and wastewater system planning, modeling, design and construction in the Charlotte area. Jason has extensive knowledge in linear asset rehab, design and pumping systems. Jason will focus on expanding our pipeline and pumping design capabilities in the Charlotte market while also helping deliver a wide variety of other related projects at GHD. Please contact Jason at [email protected] or (704) 342 4913.

Thomas Fitzgerald, PEPromoted to Principal

Schnabel Engineering, Inc. is pleased to announce the recent promotion of Thomas Fitzgerald, PE, to Principal of the firm. Tom is currently the Branch Leader of the Greensboro, NC office of Schnabel Engineering South, PC, where he manages a team of over 25 engineers, geologists, and CAD and GIS professionals doing dam projects across the US and Alaska. Tom brings more than 18 years of technical and project management experience in dam-related work, from inspections, hydrology and hydraulics, design of new dams, rehabilitation of existing dams, spillways upgrades, instrumentation, and risk assessments. His experience includes work on all major dam types, from earthen embankments, to concrete dams and RCC. Tom is a Federal Energy Regulatory Commission (FERC)-approved Independent Consultant and FERC-approved Facilitator for Potential Failure Mode Analyses, and

leads our efforts in tracking FERC’s recent Risk-Informed Decision Making initiatives.

Tom holds a BS degree in Civil Engineering and an MS degree in Water Resources Engineering, both from Rutgers College of Engineering, Piscataway, NJ. He is the Vice President of the North Carolina Section of the American Society of Civil Engineers (ASCE). He is a licensed Professional Engineer in Washington, Virginia, Oregon, Alaska, North Carolina, New Jersey, Michigan, Kentucky, and Pennsylvania. He can be reached at [email protected].

About SchnabelSchnabel, an employee-owned company, is an ENR Top 250 engineering firm, employing over 300 professionals in 18 nationwide locations. Schnabel specializes in geotechnical, geostructural, dam, and tunnel engineering, as well as environmental, geosciences, construction monitoring, and resident engineering services. For more information, please visit us at schnabel-eng.com.

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NC Currents is the official publication of NC AWWA-WEA. Members, individuals, and committees are encouraged to submit content for the magazine. If you would like to submit an article to be considered for publication in NC Currents please complete the Submission Form & Publication Agreement (available at www.ncsafewater.org) and email both the completed form and your article to Nicole Banks at [email protected]. Articles must be received by 5:00pm EST on the listed submission deadline.

The editors of NC Currents welcome the submission of all articles related to the water and wastewater industry. Themes serve as general guidance for each issue, but articles are not limited to an issue’s specific theme. Submission of an article does not guarantee publication. The editorial committee will review and select all articles, and authors will be notified of the status of their submission.

NC Currents Future Themes & Submission Deadlines

WINTER 2016 How We Protect Your Water (Submission deadline October 5, 2015)

According to mywatermatters.org “…the value of water is immeasurable. It is a vital resource in every form of nourishment we need for our bodies to survive and in every commodity we use…” Every person living in North Carolina benefits from clean safe water every day. However, the general public may not be aware of the resources, technology, and professionals who protect their water, treat it to drinking water standards, deliver it to homes and businesses, collect it after use, and treat it prior to returning it to the environment. This issue of NC Currents will explore the many ways that water industry professionals protect the general public. Potential topics include:• Protection of source waters,• Water forecasting, management, and regional master planning,• Advances in treatment technology,• Best practices in storage, distribution, pumping, and collection,• Improvements in water quality through monitoring

SPRING 2016 Water and Sewer Under Pressure (Submission deadline will be in early January 2016.)

The DIRECT® GRIT REMOVAL SYSTEM is another quality engineered product offered by WSG & Solutions, Inc. Reasons why the DIRECT Grit Removal System is your best choice:

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A low‐cost solution for almost any grit removal need! The original DIRECT Grit Removal System design comes from out‐of‐the‐box thinking, resulting in ground‐breaking improvement of capture efficiency from a straight‐forward settling process. A better concept than mechanical‐driven whirlpool methods is now available.

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Represented by:

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10-YEARWARRANTY

Manhole & WetwellRehabilitation System

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www.spectrashield.comLayers of quality, years of protection.

Office 803-730-6635Toll Free 866-891-2676

[email protected] Box 5248Columbia, SC 29250-5248

JOHN T. GAFFNEY

Utility land Service, llcRight-of-Way & Real Property Acquistion

Real Estate Consultation Services

Providing “Turn-Key” Biosolids Management Programs for municipalities and industries throughout the Carolinas.

755 Yadkinville Rd. Mocksville, NC 27028

336.751.1441 336.751.1442 Fax www.emaresourcesinc.com

Contact: Erik Blankenship - President

• Land Application• Monitoring & Reporting• Biosolids Sampling & Analysis• Permitting• Public Relations & Education• Alkaline Stabilization• Dredging & Pumping• Digester & Lagoon Cleaning• Mobile Mechanical Dewatering

& Transportation

• WATER&WASTEWATERTREATMENTPLANTDESIGN&OPTIMIZATION

• WATERDISTRIBUTION&STORAGESYSTEMDESIGN

• WASTEWATERCOLLECTIONSYSTEMDESIGN

• PUMPSTATIONDESIGN

• GRANT/FUNDINGASSISTANCE

• OPERATIONALPROCEDUREMANUALS

• FINANCIALANALYSIS&RATESTUDIES

• MASTERPLANNING&FEASIBILITYSTUDIES

• ENVIRONMENTALASSESSMENTSTUDIES

• PRELIMINARYENGINEERINGREPORTS

• WASTEWATERDISPOSALSOLUTIONS

• REGULATORYCOMPLIANCEASSISTANCE

• WASTEWATER&WATERSYSTEMASSESSMENT

WATER AND WASTEWATER ENGINEERING SERVICES

www.allianceCE.com

Columbia, SC 803 779-2078

Greenville, SC 864 284-1740

Charlotte, NC 704 527-4474

Bluffton, SC 843 757-5959

Charleston, SC 843 203-1600

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ProvidingClean WaterSolutionsOffering comprehensive water, wastewater, and electrical engineering services

www.mcgillengineers.com844.448.4333

Cary | Pinehurst | Hickory | Asheville | Boone



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2015 Schedule of EventsThe following schedule is current as of August 2015. For updates or more information, please contact the organization listed with each event. If a listed event does not reference a specific organization, the item listed is a NC AWWA-WEA event. For further details concerning all NC AWWA-WEA events, visit the NC AWWA-WEA website at www.ncsafewater.org or contact the NC AWWA-WEA office directly at (919) 784-9030.

October

1 Industrial Seminar (Tentative) Location to be announced.

29 NCWTFOCB Exams (application deadline 30 days prior) Kinston, Morganton, and Raleigh NCWTFOCB (919) 707-9040

29 Growing Relationships & Opportunities through Water Resources (GROW) Wilmington

November

15-18 NC AWWA-WEA Annual Conference Raleigh, NC

December

8 Construction Issues Seminar Clemmons, NC

10 NCWPCSOCC Exams Kenansville, Morganton, Raleigh, Salisbury, & Williamston NCWPCSOCC (919) 807-6535

March 2016

14-18 Coastal Collection/Distribution School Morehead City, NC

April 201617-19 Spring Conference

Asheville, NC

25-28 Eastern Maintenance Tech School Raleigh, NC

25-29 Eastern Biological WW School in Raleigh, NC

26-29 Physical Chemical WW School Raleigh, NC

June 2016

13-16 Western Maintenance Tech School in Morganton, NC

13-17 Western Biological WW School Morganton, NC

July 2016

11-15 Western Collection/Distribution School Morganton, NC

September 2016

12-16 Eastern Collection/Distribution School Durham, NC

November 201613-16 Annual Conference

Raleigh, NC

PRECON TANKSPRESTRESSED CONCRETE TANKS

PRECON CORPORATION115 SW 140TH TERRACE, NEWBERRY, FL 32669

PHONE: (352) 332-1200 FAX: (352) 332-1199www.precontanks.com

The Permanent Solution for Water Storage

• Design • Construction • Inspection

Jacksonville, NC 2,500,000 Gallons






2015 Corporate eSponsors

Highway Culverts

SEPTIC SEWER DRAIN PIPES

• Airport Runway/Parking Lot Golf Course Storm Drains

• Industrial Waste Water Applications

• Constructed Wetlands• Landfill Drainage

• Sewer Sludge Compost Pipe

Crumpler Plastic Pipe, Inc.Post Office Box 2068Roseboro, NC 28382Phone: 910-525-4046

For the Best Quality and Service CallFAX 910-525-5801

TOLL FREE: 1-800-334-5071

3” to 48”

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CB&I Designs & Builds award winningSteel Water Storage Tanks

elevated potable storage needs

Don Nasontel: [email protected]

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CB&I • 11560 Great Oaks Way, Ste 500 • Alpharetta, GA 30022


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COMPANY PAGE PHONE WEBSITE

ACIPCO 103 205-325-7701 www.american-usa.com

A.C. Schultes of Carolina 67 910-285-7465 www.acschultesnc.com

Alliance Consulting Engineers 109 704-527-4474 www.allianceCE.com

Analytical Services, Inc. 111 770-734-4200 www.asi-lab.com

Aqua-Pipe/Sanexen Environmental Services Inc. 77 800-263-7870 www.aqua-pipe.com

Bilfinger Water Technologies-Airvac 11 813-855-6297 www.water.bilfinger.com

Bio Green Services, Inc. 60 336-940-4544 www.biogreensvc.com

Bio Triad Environmental, Inc. 8 888-658-7423 www.BIOTRIAD.com

Black & Veatch 47 407-548-8561 www.bv.com

Brown and Caldwell 65 704-358-7204 www.brownandcaldwell.com

Carolina Management Team 16 828-648-7708 www.CMTcoatings.com

Carolina Pumpworks, LLC 97 843-522-9600 www.cpwllc.com

CB&I Constructors, Inc. 111 800-543-2938 www.cbi.com

CDM Smith 13 919-787-5620 www.cdmsmith.com

CH2M Hill 6 704-544-4040 or 919-875-4311 www.ch2m.com

Charles R. Underwood, Inc. 50 800-729-2463 www.crupumps.com

ClearWater, Inc. 58-59 828-855-3182 www.clearwaterinc.net

Covalen 94 877-770-8277 www.covalen.com

Crom Corp 57 352-372-3436 www.cromcorp.com

Crowder Construction 86 919-367-2000 www.crowdercc.com

Crumpler Plastic Pipe, Inc. 111 800-334-5071 www.cpp-pipe.com

Dewberry 29 703-289-4794 www.dewberry.com

Dixie Electro Mechanical Services Inc. 100 704-332-1116 www.dixieemsi.com

EMA Resources, Inc. 109 336-751-1441 www.emaresourcesinc.com

Engineered Pumps Inc. 2 800-528-4154 www.engineered-pump.com

Evoqua Water Technologies 19 www.evoqua.com

EW2 Environmental, Inc. 56 704-542-2444 www.ew2.net

Ferguson Waterworks 38 803-457-5718 www.ferguson.com/waterworks

Flygt - a Xylem brand 23 704-504-8804 www.xyleminc.com

Force Flow 90 800-893-6723 www.forceflow.com

Franklin Miller 20 800-932-0599 www.franklinmiller.com

Frazier Engineering 71 704-822-8444 www.frazier-engineering.com

Freese and Nichols 44 919-582-5850 www.freese.com

Garney Construction 101 407-877-5903 www.garney.com

Gavel & Dorn Engineering, PLLC 28 704-919-1900 www.gaveldorn.com

HACH 60 800-227-4224 www.hach.com

Hazen & Sawyer, P.C. 40 919-833-7152 www.hazenandsawyer.com

HDR 115 704-338-6700 www.hdrinc.com

Heyward Incorporated 3, 73, 91, 114 704-583-2305 www.heyward.net

Highfill Infrastructure Engineering, P.C. 30-31, 85 910-313-1516 www.hiepc.com

Hydro International Wastewater 15 866-615-8130 www.hydro-international.biz

J&S Valve, Inc. 116 281-324-3990 www.jandsvalve.com

Kemira 4 800-879-6353 www.kemira.com

Kimley-Horn and Associates, Inc. 110 888-542-4636 www.kimley-horn.com

Kusters Water 113 800-264-7005 www.kusterswater.com

LaBella Associates, P.C. 60 585-454-6110 www.labellapc.com

Lord & Company, Inc. 81 803-802-0060 www.lordandcompany.com

Martech Research 111 803-459-2427 www.martechresearch.com

McGill Associates 109 828-252-0575 www.mcgillengineers.com

McKim & Creed 107 704-841-2588 www.mckimcreed.com

Mechanical Equipment Co. 76 704-847-2100 www.mechequip.com

Medora Corporation (SolarBee and GridBee brands) 21 866-437-8076 www.medoraco.com

Neptune 72 281-794-3133 www.neptunetg.com

Oldcastle Precast 18 888-965-3227 www.oldcastleprecast.com/wastewater

Olympus Technologies, Inc. 32 541-689-5851 www.oti.cc


Advertiser Information Center

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COMPANY PAGE PHONE WEBSITE

Advertiser Information Center

C

M

Y

CM

MY

CY

CMY

K

ZIMA325 (7x4.625)MRS-r4-final.pdf 1 5/18/15 1:37 PM

PC Construction 46 919-661-9488 www.pcconstruction.com

Pete Duty & Associates 52 704-573-2035 www.peteduty.com

Pittsburg Tank & Tower 92 270-826-9000 x330 www.watertank.com

Precon Tanks 110 352-332-1200 www.precontanks.com

Premier Water 63 704-907-5474 www.premierwater.com

RK&K 44 888-521-4455 www.rkk.com

Salmons Dredging Corporation 55 843-722-2921 www.salmonsdredging.com

Sanitaire - a Xylem brand 47 414-365-2200 www.xyleminc.com

Schnabel Engineering 14 336-274-9456 www.schnabel-eng.com

Shield Engineering, Inc. 4 800-395-5220 www.shieldengineering.com

ShinMaywa (America), Ltd. 60 704-945-7112 www.shinmaywa.co.jp/america/

Smith & Loveless Inc. 12 800-898-9122 www.smithandloveless.com

Southern Environmental Systems 104 803-924-4323 www.southernenvironmentalsystems.com

SpectraShield Liner Systems 109 800-284-2030 www.spectrashield.com

Tencarva Municipal 103 336-665-0250 www.tencarva.com

The Perkinson Company, Inc. 106 800-833-7375 www.perkinsonusa.com

The Wooten Company 99 919-828-0531 www.thewootencompany.com

Total Piping Solutions, Inc. 25 716-372-0160 www.tps.us

Unifilt Corporation 26 800-223-2882 www.unifilt.com

Utility Land Service, LLC 109 803-730-6635 www.utilitylandservice.com

Valve Specialties, Inc. 69 704-455-5600 www.valvespecialties.com

Vesconite Bearings 99 866-635-7596 www.vesconite.com

WC Equipment Sales, Inc. 43 678-730-0997 www.wcequipment.com

Willis Engineers 64 704-377-9844 www.willisengineers.com

WSG & Solutions, Inc. 108 267-638-3000 www.wsgandsolutions.com




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360 Water, Inc.Customized Online Training

Alfa Laval Inc.Belt Filter Presses, Centrifuges, Heat Exchangers

APG Neuros Inc.High Speed Turbo Blowers

Aqua-Aerobic Systems, Inc. (†)Filtration, SBR, Aeration, WW Plant Mixers

Aquionics, A Halma CompanyIn-line & Open Channel UV, PearlSense™ UV TransmittanceASA AnalyticsChem Scan®

Ashbrook Simon-Hartley, An Alfa Laval CompanyBelt Presses, Gravity Belt Thickeners

Biowater Technology USA, LLC (†)Moving Bed Biological Reactor, Integrated Fixed-FilmActivated Sludge, Continuous Flow Intermittent Cleaning

Blue -White Industries, Inc.Chemical Feed Pumps & Accessories

Blue InGreen®, LLCDissolved Oxygen Delivery Systems

Cerlic Environmental Controls, Inc.Analytical Instrumentation, TSS, Sludge Blanket Analyzer

Continental Blower, LLCMulti-stage Centrifugal Blowers

CST CoversTemcor/Conservatek® Aluminum Covers

EnviroMix, Inc.Large Bubble Mixing

Evoqua Water Technologies LLCWW Process Equipment, Envirex Products

Fluid EngineeringStrainers

Force Flow / FloquipChemical Scales

GA Industries, LLC, A Rexnord Valve & Gate Group CompanyAir, Check, Butterfly, Control, & Plug Valves

GE Water & Process TechnologiesNF/RO/ZeeWeed® for W & WW Process Equipment

Groth Corporation®

Digester Gas Safety Equipment

GrundfosMorris Non-Clog Sewage Pumps

HACH Company (†)Collection System Flow Monitors & Services

Hayward GordonANSI Process Pumps, Hard Metal Pumps, Mixers

Heyward ServicesCustom Control Systems

InfoSense, IncorporatedSewer Line Rapid Assessment (SL-RAT)

Integrity Municipal SystemsChemical Feed Systems

Ishigaki USA, Ltd. (†)Screw Pres ses

Jim Myers & Sons, Inc.W & WW Process Equipment

Johnson Screens®, Inc.Passive Intake Screens, Filter Underdrains

JPS Industries, Inc. (†)Diversion Baffles

JWC Environmental®

Muffin Monster® Products and Headworks Systems

KrohneMagmeters & Analytical Instrumentation

Layne / Verti-Line PumpsVertical Turbine Pumps, Mixed & Axial Flow Pumps

Marcab Company, Inc.Odor & Digester Gas Scrubbers

MR Systems, Inc.SCADA, I&C Systems, Telemetry, Service, Surveillance Systems

Multisensor SystemsOnline TTHM Analyzers & VOC Monitors

Nefco, Inc.Weirs & Baffles, Density Current Baffle System, Launder Covers

OpenChannelFlowFlumes, Weirs, Metering Manholes

Orica Watercare, Inc.MIEX® Technology, Ion Exchange

Ostara Technologies, Inc.Nutrient Recovery Process

Parkson CorporationW & WW Process Equipment, Hycor® Products, Maxim OS

Patterson Pump CompanyW & WW Pumps, FloPak Package Pump Stations

PEPCON SystemsTM

Odor Control & Hypochlorite Generation Systems

Poly Processing CompanyHDXLPE Tanks

ProMinent® Fluid Controls, Inc.Chemical Feed Pumps, Systems, and Analyzers

Red Zone® Robotics (†)Sewer Pipeline Inspection - CCTV

Robuschi USA Inc.Positive Displacement Blowers

Rodney Hunt Company / Fontaine, A Rexnord Valve & Gate Group Company

Gates & Valves

Rotork® Controls Inc.K-tork, Jordan, Rotork Actuators

Seepex®, Inc.Progressive Cavity Pumps

Stamford Scientific International, SSIDiffused Aeration

Underground Solutions, Inc.Fusible PVCTM

Unifilt CorporationFilter Media & Installation

VAG, A Rexnord Valve & Gate Group CompanyDouble & Triple Offset Butterfly Valves, Slanted Tilting DiscCheck Valves, Knife Gate Valves, Sluice Gate Valves, Penstocks

Vapex Environmental Technologies, Inc.Odor Control

WSG & Solutions, Inc.Rex® Bar Screens & Grit Collectors

ZAPS TechnologiesOnline BOD, COD, TOC, E. Coli

Municipal Water andWastewater Process

2101-A Cambridge Beltway Dr. • Charlotte, NC 28273 • Phone: 704/583-2305 • Fax: 704/583-2900 •www.heyward.net

† Denotes coverage in NC, SC & East Tennessee NC/SC/E.TN 1/13/15


Bridging the gap between idea + achievementThis is where great begins.

Serving the Carolinas since 1961

hdrinc.com

47273 SC Currents Journal-Summer 2014_FINAL.indd 1 4/11/2014 10:11:47 AM

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Documents

Trenchless Technology: Trenchless Technology: