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James J. PaluchAssistant Superintendent /Collection System Ops

Joint Meeting of Essex & Union Counties, Elizabeth, NJ

Tina WolffSr. Project Engineer

Malcolm Pirnie, Inc.Ft. Wayne, IN

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Perspectives on Pipeline RenewalThe A,B,C’s Series

Webcast Sub-Committee Members

• Abraham Araya – Seattle, Washington• Thomas Curl – The Woodlands, Texas• Mattie A. Engels – Dallas, Texas• Wes Frye – Nashville, Tennessee• Chris Johnston – Burnaby, British Columbiay• Stephen A. Lipinski – Duluth, Minnesota• John Nelson, Pewaukee, Wisconsin• James J. Paluch – Elizabeth, New Jersey• Tina Wolff – Fort Wayne, Indiana

Existing Sewer Evaluation and Rehabilitation

• WEF Manual of Practice FD-6

• ASCE Manuals and Reports on Engineering Practice No. 62

• 2009, Third Edition

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Chapter 6 –Selection of Sewer Rehabilitation

Methods and Materials• OVERALL CONTENTS

• Introduction & Overview• Rehabilitation Types, Materials, Methods• Pipeline Repair, Renewal, Replacement (RRR)• Manhole & Service Connection / Sewer Lateral

RRR• The Selection Process• Quality Assurance / Quality Control

The A,B,C’s Series Continues• July 28, 2010: Perspectives on Pipeline Renewal• November 2010: Perspectives on PipelineNovember 2010: Perspectives on Pipeline

Replacement

• AND SCHEDULED FOR 2011 -• February 2011: Manhole Repair, Renew, Replace• June 2011: Service Connection / Sewer Lateral Ju e 0 Se ce Co ect o / Se e ate a

Repair, Renew, Replace• November 2011: Pump Station / Lift Station Repair,

Renew, Replace

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• Rehabilitation – repair, renewal, replacement – is t t t f ta constant part of sewer management

• Financial limitations are forcing us to “do more with less”

• Good technologies are being eliminated from the rehabilitation tool box due to -– Poor applications of technology– Poor definition of conditions– Poor oversight– Poor communication

• Be fully aware of the interrelationship between the owner, designer, contractorbetween the owner, designer, contractor and manufacturer

• Understand the rehabilitative processes available to you

• Identify your specific conditions and select the best rehabilitative tool

• Apply appropriate QA/QC standards to protect your rehab investment

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Owner

Contractor Designer

Manufacturer

•• Catherine Morley P ECatherine Morley P E•• Catherine Morley, P.E.Catherine Morley, P.E.RJN Group, Inc.RJN Group, Inc.

-- Consultant’s perspectiveConsultant’s perspective-- Understanding the Understanding the

pipeline renewal processpipeline renewal process-- Managing expectationsManaging expectations

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D i M Cl h P ED i M Cl h P E•• Denise McClanahan, P.E.Denise McClanahan, P.E.Reynolds InlinerReynolds Inliner

-- Contractor’s perspectiveContractor’s perspective-- Alternatives to the “traditional” Alternatives to the “traditional”

pipeline renewal approachpipeline renewal approachpipeline renewal approach pipeline renewal approach -- Case StudiesCase Studies

•• Sarah White / Crystal FleetSarah White / Crystal FleetKing County, WashingtonKing County, Washington

-- Owner’s perspectiveOwner’s perspective-- Team Approach to planning, Team Approach to planning,

design & construction design & construction -- The value of proper QA/QCThe value of proper QA/QC-- Case StudyCase Study

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Pipeline Renewal A Consultant’s Perspective

Catherine Morley P ECatherine Morley, P.E.Senior Project Manager

RJN Group, Inc.

Pipeline RenewalWEF Manual of Practice No. FD-6 Chapter 7

• Pipe LiningPipe Lining– Cured-In-Place Pipe (CIPP)– Fold-and-Form Pipe– Rolldown and Swagelining Pipe– Spiral-Wound Pipe

Panel Systems– Panel Systems• Slipliners

– Continuous– Segmental– Materials

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Can it be Renewed?

• Can Line Many “Un-Lineable Pipes”Can Line Many Un Lineable Pipes– Crown missing– Deformed pipes– Soil visible– Infiltration

Pipe size change– Pipe size change– Bends (depends on diameter)

• Talk To a Contractor!

“Go For It” Versus Point Repair

• Size of Pipe• Size of Pipe• Houses / Businesses Upstream• Inaccessibility for Point Repair

– Backyards– BuildingsBuildings– Under creek / railroad, etc.– Depth

• New Road Surface

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It Can Be Lined!

It Can Be Lined!

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Drop Joints

• Can Be Lined Through But• Can Be Lined Through But– Can you get the camera through?– Diameter?– Reduction in capacity– Point load– Inversion may be difficult

• Talk to a Contractor!

Lining Drop Joints

Medium – Yes Large – No

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Cured-in-Place (CIPP)• Most Commonly Used Pipeline Renewal

Method • Felt Tube with Resin

– Polyester – most installations– Vinylester – industrial installations– Epoxy – pressure mains

• Reinforced TubeReinforced Tube– Fiberglass– Carbon Fiber– Much thinner tube for corresponding pipe

size versus felt tube

CURED-IN-PLACE PIPE (CIPP)

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Preparation• Cleaning• Root Removal• Protruding Taps• Grease Removal• Tuberculation• Mineral Deposits• Bitumen Coating

Preparation Is Key to aSuccessful Project

Design of Liner

Most Important Factors Are:Most Important Factors Are:• Size of Pipe• Depth to Crown• Groundwater Elevation• Unusual Loading• Pipe Ovality

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Design of Liner and Installation

• 6 mm Thickness “Normal” Size for6 mm Thickness Normal Size for Smaller Pipes; 7 mm Thickness for 15” and Above– Be consistent with how thickness

measurement is specified• May Need to Thicken Tube for DeeperMay Need to Thicken Tube for Deeper

Installation• May Need to Change Curing Method

Based on Site Conditions

Inversion Versus Pull-in

• Inversion (ASTM F1216)– Oldest installation method used in US– One installation step– Maximizes resin lock at joints and defects– Can install long lengths and large diameters

• Pull-in (ASTM F1743)– Exterior coating gives added protection

• Infiltration• Coatings in host pipesg p p

– Control of resin migration leading to more uniform, controlled finished thicknesses

– Lengths and diameters are limited by tube weight

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Inversion

Pulled-in-Place

• Water• Steam• Ultraviolet Light

Curing Methodologies

• Ultraviolet Light

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• Pros– History: proven curing method– Ability to deal with sags– One uniform temperature through the pipe segment

Water Curing

One uniform temperature through the pipe segment– Can deal with large diameters and long lengths– Deep installations– Severely fractured/deformed pipe– Pipe missing

• Cons– Need for water– Not ideal for remote locations– Height for inversion towers

• Overhead obstructions– Limitation with steep slopes

Steam Curing• Pros

– Less time• Small diameter – multiple installs in a single day

Hi h d f id d d l– Higher degree of cure – provided done properly• Higher degree of cure = higher physicals

– Allows for steep slope installations– Limited access for steam hoses– Limited amount of water needed therefore

good for remote locations• Cons

– SafetySafety– Size and length limitations – up to

about 54” diameter– Degradation of coatings with excessive heat

• Blistering potential– Limitation with sags – must evacuate all water

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Ultraviolet Light Curing• Pros

– Camera on light chain allows for viewing of potential problems before curingL t i id l t– Lowest in residual styrene

– Extended shelf life: up to six months• Cons

– Thickness limitations: 12 to 15 mm– Since tubes are non-perforated pull-in tubes, no resin lock with host

pipe– Size limitations – typically small diameter but possible up to 48”

diameterdiameter– Less US experience than water or steam– Different resin specifications

• Isothalic NPG resin better corrosion resistance• Orthothalic resin better light penetration

– Length limitations

The Finished Product

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Pipeline Renewal QA / QCPost - Testing

• Air Test• Air Test• Exfiltration• Liner Sampling• Visual Pipe• Ultrasonic• Ultrasonic

Post-Rehab Defects

• FinsFins• Ripples• Bubbles• Dry Patches• Pinholes• Lifts• Lifts• Infiltration

– Migration of flow to service or pipe seal– Cut in liner at service

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Defect Remediation

• Pinholes or Dry PatchesPinholes or Dry Patches– Short-liner

• Bubbling– Grinding and short-liner

• Strength Test Failure– Re-line

• Infiltration– Service connection – grout or line

connection– Pipe seal – grout– Some occasions – point repair

Other Pipe Lining Methods

• Fold & Form Pipe• Fold & Form Pipe• Rolldown and Swagelining Pipe• Spiral-Wound Pipe• Panel Systems

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Fold-and-Form Pipe

• Folded Thermoplastic• Folded Thermoplastic• PVC or HDPE• Rerounded

– Pressure– HeatHeat– Mechanical

• Small Diameters

Rolldown and Swagelining

• Gas Main RenewalGas Main Renewal• Variant to Sliplining• Polyethylene Pipe• Reduce Size to Install• Expand to Tight Fit• Rolldown• Rolldown

– Cold-rolling then pressurized • Swagelining

– Swaging die then expand over time

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Spiral-Wound

• PVC-Ribbed Profile• PVC-Ribbed Profile• Interlocking Edges• Optional Rib Reinforcement• Typically Large Diameter• Odd-Shapes

Panel Systems• Man Entry Sewers• Easy HandlingEasy Handling• PVC or FRP Ribbed Panels

– Interlocking– Joiner strips– Grouting annulus– Structural

• High Density Polyethylene– 270º to 300º cover top of pipe– Bolted or pinned to pipe wall– Corrosion applications– Non-structural

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Sliplining• Don’t Need to By-Pass Flow• Install Against Significant Hydrostatic

Pressures• Lose Some Dimension and Therefore

Capacity• Doesn’t “Do” Bends

N d A Pi• Need Access Pits• Grout Annulus• Service Reinstatement by Excavation with

Extension

Sliplining

• Continuous• Continuous– Small diameter– Welded HDPE

• Segmental– Larger diameterg– Gasketed or mechanical

• Various Materials

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Sliplining

• Pros– Long insertion lengths– Wide variety of pipe materials– In many cases bypassing may be reduced

or eliminated• Cons• Cons

– Reduced pipe diameter– Difficulty reinstating services– Excavation required

Managing Expectations• This Is Pipeline Renewal Not Replacement

– (Replacement will be addressed in next Webcast)(Replacement will be addressed in next Webcast)• The Quality of the Finished Product Is Dependent on

the Host Pipe– Small concrete pipes can have large variations in

diameter depending on level of erosion / corrosion– Tuberculation of iron can’t always grind to smooth

pipe– Pipe with long sections of PVC point repairs don’t

always line well• It Isn’t Always Pretty• Maintain Open Communication

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It Isn’t Always Perfect

Or Pretty !

Thank You

Pi li R l Pipeline Renewal A Consultant’s Perspective

Catherine Morley, P.E.Senior Project Manager

RJN Group IncRJN Group, Inc.(630) 682-4700

cmorley@rjn.com

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Questions ?

Questions ?

Pipeline Renewal – Contractor’s Perspective

Denise McClanahan, P.E.

Vice President, Reynolds Inliner

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WHAT SHOULD YOUR SPEC DEFINE/REQUIRE?

• The appropriate industry standards• Design parameters to accomplish your goals and

provide for consistent designprovide for consistent design– Example in CIPP: groundwater depth, assumed pipe

ovality, soil modulus– Define thickness for CIPP?

• Minimum physical property requirements• Testing and sampling

– Ensure you get what you want through appropriateEnsure you get what you want through appropriate sampling techniques and frequency

• Clear definition of consequences of not meeting contract specifications– Realistic with some flexibility– Define financial credits

• Most common warranty– One year after completion

UNDERSTANDING WARRANTY REQUIREMENTS

y p• Manufacturer’s warranty versus maintenance bond• Bonding agencies are resisting long term

maintenance bonds– Two and three year are doable– Five year are requiring higher level involvement

T diffi l l di d d– Ten year are difficult, strongly discouraged and expensive

• Contracts with extended warranties need to consider separate bid item for the warranty so it is transparent

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WHAT CAN SET CONTRACTORS APART?

• Experience• ISO (International Standards Organization) certifications• Manufacturing in controlled environments• High quality materials specifically designed for the

applications• Limitations on third party involvement on upfront thingsLimitations on third party involvement on upfront things

- Example: In CIPP should wetout by a third party be allowed or should the contractor be required to do it?

• Financial stability

ESTABLISH REALISTIC EXPECTATIONS

• Must keep in mind we are rehabilitating old pipes not installing new onesg

• Understand the difference between cosmetic, structural and performance issues

• Define chain of communication in both directions of organization

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OPEN MINDED APPROACH• Improvements and modifications

- Materials- Manufacturing- Installation

• Don’t dictate contractor’s means and methods

FOCUS ON ALTERNATIVE CONTRACTING

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WHY WE REHABILITATE• Extend the useful life on the

infrastructure investment

• Recapture capacity

• Eliminate health hazards

WHY WE REHABILITATE (CONTINUED)

• Eliminate “paralysis by analysis”

• Expedite compliance

• Leverage previous investments

• Demonstrate accountability to the “customer”

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“TRADITIONAL” APPROACH

• Define problem

- Overflows, blockages, regulatory actionsg g y

• Study, study, and study problem

• Engineering design

• Bid and award

• Construction and inspection

• Evaluate results

CHANGING THE WAY WE THINK

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ALTERNATIVES TO THE “TRADITIONAL” APPROACH

• Find and Fix It Approach

D i b ild li d t i ti ti d– Design build applied to sewer investigation and repair

• Performance-Based Contracting Element

– Contractor guarantees some performance standard

• Reduction of CSOs

• Percentage reduction of Infiltration and Inflow (I/I)

– Penalty for failing to meet goals

– Bonus for exceeding guarantees

“FIND & FIX” CONTRACT• Design-build concept applied to sewer repair and

rehabilitation• Blend of engineering and construction

- NOT another study• Integrates inspection, problem determination, design

and construction• Allows decisions to be made in field not office• Contractor element allows for most cost-effective• Contractor element allows for most cost-effective

solution to each problem• Allows for quick and economical fixes to problems

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GOALS OF A FIND AND FIX

• Quick and economical approach to fixing problems

• Reduce I/I

• Recapture capacity

• Extend useful life on infrastructure investment

• Expedite compliance

L i i t t• Leverage previous investments

• Demonstrate accountability to “customers”

CRITICAL SUCCESS FACTORS

• Leverage available data, knowledge and experience

• Establish preconstruction baseline flow

• Target most effective and efficient repairs

• Integrate construction and continued field investigations

• Access to the ENTIRE system

• Measure effectiveness

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POTENTIAL PITFALLS• A half empty “tool box”

- Biased decisionsBiased decisions

• Poorly and/or ill defined scope, baseline conditions, pay items, reward

• Unrealistic expectations

• Politically made marriages

Decision paral sis• Decision paralysis

• Ill defined approval process

“FIND & FIX” APPROACH• Establish baseline: preconstruction condition

• Use owner’s data, knowledge, and experience

• Integrate construction and additional field investigations

• Complete system rehabilitation

- Sewers (full and partial rehab)

- ManholesManholes

- Service laterals

• Measure effectiveness

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BENEFITS OF “FIND & FIX”• TEAM SYNERGY: Expertise from the technical and practical

side together with the same goal• Speeds results - construction is immediate after investigation

Q f• Quicker system benefits• Allows for efficiency in rehabilitation and scheduling thus

reduced costs• Streamlines time and effort• Reduces I/I• Recaptures capacityp p y• Extends useful life on infrastructure investment• Expedites regulatory compliance • Leverages previous investments• Demonstrates accountability to “customers”

CASE STUDY #1: GWINNETT COUNTY, GA FIND AND FIX

• Drivers

- Capacity limitations from growth

- Eliminate “analysis by paralysis”, no more studies!

- Show results now

Believe problems are limited to floodplain- Believe problems are limited to floodplain

• Previous studies, limited rehabilitation

• Limited baseline flow data

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GWINNETT COUNTY FIND AND FIX • Gwinnett County sewer system

– Beaver Ruin, Jackson Creek, Sweetwater Creek Upper Yellow RiverCreek, Upper Yellow River

– 5,000,000 LF sewers

– 24,000 manholes

– 79,000 acres

• Project area = 100-year floodplain within selected basins

– 950,000 LF sewers

– 3,000 manholes

– 7,000 acres

GWINNETT COUNTY FIND AND FIX • Began summer 2002 as 1 year contract $2.5

million with 2 one-year renewals• Established unit prices for numerous work items• Work order approval by owner• Prepare system maps

- Utilize available data from several sources• Integrate field investigations and “Fix” selectiong g• Search, select, purchase, populate, and

maintain computerized maintenance management system (CMMS) software

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GWINNETT FIND AND FIX RESULTS• $11 million spent in 3 year period• Investigation

- Televised 875,800 feet of sewerInspected 3 380 manholes- Inspected 3,380 manholes

• Rehabilitation – 3,100 Approved Work Orders- 28,350 LF CIPP (8” – 24”)- 225 point repairs (8” – 24”)- 146 Joint Seals (36” – 60”)- $5.4 million in MH Rehabilitation

• Identified an estimated 16.7 MGD of I/I• Removed an estimated 9.3 MGD of I/I• Cost of I/I removal: $0.82 per gallon• Estimated annual savings: $3.5 million in transport and treat costs

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WHAT IS A PERFORMANCE BASED ELEMENT?

• Contractor/engineer team is held to a predefined performance standardp

- Guaranteed reduction in I/I (reasonable)

- Elimination or reduction of CSOs

• Team is provided with a bonus when goals are met or assessed a penalty if goals are not achieved – typically monetaryy

• Provides accountability

• MUST HAVE SOMETHING ON WHICH TO EFFECTIVELY AND ACCURATELY MEASURE RESULTS

CASE STUDY #2:WHITE’S CREEK: NASHVILLE, TN

• 5-year, $7.5 million contract with the Metro Water Services of Nashville and Davidson Countyy

• Began August 2000

• Performance guarantee: - Reduce total system I/I by 20 percent

• $500,000 penalty for failure to meet goal

• $500 000 bonus for 30 percent I/I reduction• $500,000 bonus for 30 percent I/I reduction

• Contract Structure and Pricing

- Schedule A: I:I Related Items

- Schedule B: Structural Repairs

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WHITES CREEK BASIN• Approximately 160 miles of 8 to 60 inch sewers• 20 000 acres• 20,000 acres• Whites Creek Pumping Station: 11.5 MGD capacity• Chronic system problems• Overflows• Very limited rehabilitation completed in system

Whites Creek Pumping Station

Whites Creek

Project Area

Whites Creek WWTP

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WHITES CREEK APPROACH

• Establish flow baseline

- 7 permanent meters, 2 temporary

10.9 MG

2.7 MG

4.7 MG

0.4 MG

1.4 MG

Whites Creek Pumping Station

Whites Creek

WWTP

Metro Long-Term Meter

Temporary Meter

Performance points

WHITES CREEK APPROACH• Leverage existing knowledge

• Target known problems and begin immediate repairs

Find

AdaptAssess

• Continual investigation while completing repairs

- Wet weather field investigations

- Televising during wet weather

- Manhole inspections

• Continual cycle Adapt

PrioritizeFix

Assess• Continual cycle

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WHITES CREEK RESULTS• Rehabilitation Summary

– 125,000 feet of 8-24 inch CIPP125,000 feet of 8 24 inch CIPP

– 470,000 feet of televising

– 433 manholes rehabilitated

– 922 laterals rehabilitated (735 with CIPP)

– 1,720 feet of pipe bursting

• 41% reduction in I/I (29.05 MGD to 17.03 MGD)

KEYS TO SUCCESSFUL REHABILITATION PROJECTS

• Established synergy between contractor and engineer• Established synergy between contractor and engineer • Complete tool box of rehabilitation methods• Access to entire sewerage system• Leverage existing knowledge, information and maps• Client with well defined expectations, ability and

empowerment to make decisionsempowerment to make decisions• Established baseline conditions• Clearly defined work order approval process• Communication!!!

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KEYS TO SUCCESSFUL REHABILITATION PROJECTS

(CONTINUED)• The right/appropriate specification

– Understand what the specification says and the cost implications of such

– Product experience– Contractor experience– Superintendent experience

• Product selection and testingg• Appropriate contracting – Traditional vs. Design Build• Realistic expectations

– Inspection• Ask questions

ADDITIONAL RESOURCES• CIPP Contractors and Suppliers• Underground Construction magazine

ndergro ndconstr ctionmaga ine com– www.undergroundconstructionmagazine.com• Trenchless Technology magazine

– www.trenchlessonline.com• Trenchless Technology Center at Louisiana Tech

Universitytt l t h d– www.ttc.latech.edu

• National Association of Sewer Service Companies (NASSCO)– www.nassco.org

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QUESTIONS?

Denise McClanahan P EDenise M Clanahan, P.E.

Telephone: 812.865.3232 (office); 317.450.0522 (mobile)

Email: dmcclanahan@reynoldsinliner.com

Questions ?

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Owner’s Perspective on PipelineOwner s Perspective on Pipeline Renewal

Sarah White, Construction ManagerCr stal Fleet Capital Project ManagerCrystal Fleet, Capital Project Manager

Overview

• BackgroundBackground• What Makes a Pipeline Renewal Project

Successful?• Team Approach to Planning, Design

and ConstructionOb i i M S• Obtaining Management Support

• The Value of Inspection and Post-construction Monitoring

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King County Washington• Service area includes 34

iti d di t i tcities and sewer districts -1.5 million residents total

• 353 miles of conveyance pipe, mostly concrete

• Diameter ranges 12” to 168”• Combined and Sanitary

systemsystem• Primary sanitary system

interceptors built in 1960’s• Corrosion is biggest area of

concern

Our History of Corrosion

• First evident in 1970’s in force mains• First evident in 1970 s in force mains and siphons

• Program to track and inspect initiated• Coatings first tested in 1987• Lining program initiated in 1988• Lining program initiated in 1988

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Corrosion Examples

Challenges• No parallel lines• Limited storage• Large

interceptors• Limited capacity• Short work

windowwindow

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Defining Successful Pipeline Renewal

• Lasting solution long term corrosion• Lasting solution, long term corrosion protection and extension of service life of pipeline

• Flow capacity not limited• Technically feasible rehabilitation ec ca y eas b e e ab a o

method• Cost effectiveness

Lasting Solutions

• Must provide• Must provide surface protection from biologically induced corrosion

• Must provide structuralstructural rehabilitation

• Must accommodate projected flows

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Feasibility and Cost Effectiveness

• Must be constructible given various operating• Must be constructible given various operating and physical constraints

• Each project should go through Life Cycle Cost analysis against pipeline replacement

• Planning Level Costs (includes surface prep and lining):and lining):– Cured in Place Pipe: $40-$42 / ft2

– Fully-adhered structural polymer: $43-$45 / ft2

Case Study

• North Interceptor (2009)North Interceptor (2009)– 1,155 lf of 138 inch diameter reinforced concrete

pipe located under a rail yard, built in 1908– Lining from 40” above invert for a total of 26,700

ft2 of fully adhered structural polymer panel lining– Construction cost: $2,024,000– Planning Level Estimate to replace: $6 890 000Planning Level Estimate to replace: $6,890,000– Assuming 50 year lifetime for lining, 100 year

lifetime for new pipe, lining costs $100,000 less per year over the lifetime of the asset

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Methods We Have Tried

• Potassium silicate shotcrete• Potassium silicate shotcrete • Mechanically adhered panel lining

systems • Various coating systems

– EpoxiesEpoxies– Polyurethanes – Novolacs, Vinyl-esters and others

Modes of Failure

Mechanically Adhered Sheets

Coating System

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Buying Time

• Slurry coat• Slurry coat application of magnesium hydroxide

• Chemical Dosing• Sewer cleaning to• Sewer cleaning to

remove slime layer

Current Methods for Rehab

• Fully Adhered Structural Polymer Panel• Fully-Adhered Structural Polymer Panel Lining System

• Cured In Place Pipe• Sliplining

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Fully-Adhered Structural Polymer Panel Lining System

Photo by the Seattle Times

CIPP

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Team Approach - Planning

• H2S Lining Program initiated in 1988• H2S Lining Program initiated in 1988• Test and evaluate new technologies• Look for system-wide corrosion trends• Prioritize for rehabilitation using

objective criteriaobjective criteria• Brief management to get approval to

move forward with project

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Team Approach - Design

• Projects are not designed in a vacuum, rather as part of the H2S Rehabilitation Program

• This maintains continuity of expertise, and allows for flexibility in planning projects

• Project Teams include project manager, engineers, construction manager, inspector, permitting, property agent, community relations, operations representative, g y p pprocurement specialist

• Lessons Learned shared and recorded at end of project

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Team Approach - Construction

• Collaboration only way to y yaddress all the challenges and coordination required to complete the work.

• “In-service” work has unique problems, combat-engineering skills helpful.

• Important to assign experienced field inspectors p pand operations support staff to these projects.

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Management Support

• Greater competition for fewer dollars inGreater competition for fewer dollars in current economy. Sewer rehabilitation is expensive.

• Take time to inform management about the nature of corrosion, consequences of failure and the unique challenges of doing this workU d t di f i h i• Understanding of corrosion mechanism allows them to give support in prioritizing rehab projects and understand what rehab methods make sense.

Sinkhole due to broken sewer trunk

Seattle - 1957

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Asset Management• “Pro-active” approach gives time to schedulePro active approach gives time to schedule

work in advance of system failure. Must keep clear documentation of corrosion rates and problem areas

• Risk analysis of entire system is recommended in order to integrate into asset management program

• King County is currently undergoing a process to determine risk profiles of damaged pipes in order to determine cost-benefit of methods that “buy time”

Inspection and Post-construction Monitoring

• Current H2S inspection list is pcomprised of 67 sites – Known problem sites– New problem sites identified

through the routine CCTV program

– All previously rehabilitated sites

• Sites are accessed, visually

AnalyzeInspect

inspected, physical samples are taken, and condition is documented.

• Data is fed back into the prioritization model

Prioritize

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Inspection Toolbox• CCTV work is in-house.

Routine inspection every 10 years, problem areas on more frequent schedule

• Film is reviewed and compared to previous condition to determine rate of corrosion

• Physical properties y p pmeasured include atmospheric H2S, pH, DO, DS and BOD and temperature

New Inspection Techniques

• Laser profiling in• Laser profiling in addition to CCTV to determine pipe wall thickness in tunnels

• Sonar for Force Mains and SiphonsMains and Siphons

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Sonar Inspection

Working Together for Better Solutions

• Most sewer rehab technology is relatively• Most sewer rehab technology is relatively new, and it is important to keep an open mind.

• Be skeptical of all manufacturer’s claims, but do not be afraid to try new things that make sense.sense.

• Routinely inspect and monitor project areas and apply all lessons learned. Gain understanding of what works and why.

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Post-Construction Monitoring Adds Value

• Work with manufacturers and• Work with manufacturers and contractors to improve their technology to suit your needs.

• Share information with other sewer utilities. King County has greatly benefited from expertise and lessons learned from utilities all over US.

Information Sharing

• Los Angeles County Early product• Los Angeles County – Early product testing

• Vancouver, BC and Metropolitan Wastewater of San Diego – analyzed failures and looked for alternatives

• Portland, Houston, Boston, Miami-Dade

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Owner’s Perspective on Pipeline Renewal

Contact Info:Contact Info:

Sarah White – Construction Managersarah.white@kingcounty.gov

Crystal Fleet – Capital Project Managercrystal.fleet@kingcounty.gov

Questions ?

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Q & A S iQ & A Session

• Understanding the multifaceted aspects of your system and incorporating same into the evaluation process will identify the best suited options.

• Seeking alternative solutions to the “traditional approach” may lead to a more cost-effective sewer rehabilitation project.

• Employing pre and post-construction QA / QC standards is a key to pipeline longevity.

• Preparation is the critical component to any successful pipeline rehabilitation project, whether it be repair, renew or replace.

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• Establish realistic expectations regarding your pipeline renewal project. In most instances, the quality of the finishedrenewal project. In most instances, the quality of the finished product is dependent on the host pipe.

• Educate and involve management in all phases of your pipeline renewal project. Develop a “Team Approach”.

• An “open channel” of communication between the Consultant / Designer Owner and Manufacturer / Contractor from the/ Designer, Owner and Manufacturer / Contractor from the inception and planning stages of a pipeline renewal project to its eventual rehabilitation are critical for project success.

Reference Standard Specs & Practice for Pipeline Renewal

• CIPP• CIPP • ASTM F1216-09 (Inversion / Curing) Practice• ASTM F1743-96 (Pulled In Place) Practice• ASTM F2019-03 (Glass Reinforced Plastic) Practice • ASTM D5813-04 (Evaluation & Testing) Practice

• Spiral Wound• ASTM F1697-07 (Standard Specification)• ASTM F1741-07 (Standard Practice)

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Reference Standard Specs & Practice (continued)

• Fold & Form / Deformed • ASTM F1504-02 (Standard Specification)• ASTM F1947-04 (Standard Practice)• ASTM F1533-01 (Standard Specification) • ASTM F1606-05 (Standard Practice) • ASTM F1871-02 (Standard Specification)

ASTM F1867 06 (St d d P ti )• ASTM F1867-06 (Standard Practice)

• Chemical Grouting • ASTM F2304-03 (Standard Practice)

Reference Standard Specs & Practice (continued)

• Sliplining - PVC• ASTM F1735-02 (Standard Specification)• ASTM F1698-02 (Standard Practice)• ASTM F1803-06 (Standard Specification) • ASTM F585-94 (Standard Practice)

• Sliplining - VCP• ASTM C1208-04 (Standard Specification)

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• ASTM International Website• http:www.astm.org/Standards/F2019.htm

Other Reference Standards

• Plastic Pipe Website• http:plasticpipe.org/municipal_pipe/sewer_standards.html

• VCP Website• http:www.ncpi.org/library/ASTM.asp

P f S ifi ti G id li (CIPP)• Performance Specification Guideline (CIPP)• http://www.nassco.org/publications/specs/cipp.pdf

• Model Specification (Sliplining PE Sewers)• http://plasticpipe.org/pdf/ms-6-2009-sliplining.pdf

The A,B,C’s Series Continues• July 28, 2010: Perspectives on Pipeline Renewal• November 2010: Perspectives on PipelineNovember 2010: Perspectives on Pipeline

Replacement

• AND SCHEDULED FOR 2011 -• February 2011: Manhole Repair, Renew, Replace• June 2011: Service Connection / Sewer Lateral Ju e 0 Se ce Co ect o / Se e ate a

Repair, Renew, Replace• November 2011: Pump Station / Lift Station Repair,

Renew, Replace

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