Rehabilitation of Wastewater Collection and Water Distribution ...

More documents

Recommendations

Info

DISCLAIMER The work reported in this document was funded by the United States Environmental Protection Agency (EPA) under Task Order (TO) 58 of Contract No. EP-C-05-057 to Battelle. This document has been subjected to the Agency’s peer and administrative review and has been approved for publication. Any opinions expressed in this report are those of the author (s) and do not necessarily reflect the views of the Agency, therefore, no official endorsement should be inferred. Any mention of trade names or commercial products does not constitute endorsement or recommendation for use. ii
EXECUTIVE SUMMARY As part of the U.S. Environmental Protection Agency’s (EPA) Aging Water Infrastructure Research Program, which directly supports the Agency’s Sustainable Water Infrastructure Initiative, scientific and engineering research is being conducted to evaluate and improve promising innovative technologies that can reduce costs and improve the effectiveness of operation, maintenance, and replacement of aging and failing drinking water distribution and wastewater conveyance systems (EPA, 2007a). Task Order (TO) 58 (under EPA STREAMS Contract No. EP-C-05-05758) is being conducted by Battelle, in cooperation with the Trenchless Technology Center (TTC) at Louisiana Tech University, Jason Consultants, and Virginia Tech, to perform a comprehensive review and evaluation of existing and emerging rehabilitation/ repair technologies for wastewater collection and water distribution systems, and select and prepare them for field demonstration. This White Paper provides an overview of the current state-of-the-practice and current state-of-the-art for rehabilitation of pipes and structures within the wastewater collection and water distribution systems. The White Paper discusses the common issues that cut across both water and wastewater applications, including the need for rational and common design approaches for rehabilitation systems, quality control/quality assurance (QA/QC) procedures and acceptance testing during installation of rehabilitation systems, decision support for choice of rehabilitation vs. replacement and choice of rehabilitation systems, and special applications of rehabilitation under challenging conditions such as elevated liner service conditions adjacent to steam lines and high pressure pipe lining systems. It also discusses separate issues for water and wastewater systems in terms of drivers for increased rehabilitation efforts and problems typically encountered. The White Paper examines the state-of-practice for rehabilitation in the water and wastewater sectors and the potential for improvement within the general classes of rehabilitation systems. It identifies some emerging technologies as candidates for potential field demonstration and cross-cutting innovation potential. The organization of a field demonstration program is also discussed. The document was used as a basis for discussions at an International Technology Forum, which was held on September 9 to 10, 2008, at Edison, NJ as part of the project activities. Participants in the Forum were invited to provide their degree of concurrence with the descriptions of the state of the industries, discuss different viewpoints as appropriate, propose additional issues to be considered, and present information on specific technological advances underway in North America and elsewhere in the world. The White Paper and Forum contributions together provide documentation and analysis of the current status of technology and practice for rehabilitation of water and wastewater systems in North America and elsewhere in the world and clear guidance on how the demonstration activities planned within the project can best contribute to advancing the technology and accelerating the adoption of favorable approaches. In many ways, the response of government and industry, once the problem of deteriorating water and wastewater infrastructure was fully acknowledged, has shown real progress. A suite of technologies for the rehabilitation of water and wastewater assets that do not require their full excavation and replacement has been developed over the past 30 to 40 years, and these trenchless technologies have made a significant penetration into the U.S. market; estimates of the proportion of rehabilitation work carried out using trenchless techniques range up to 70 percent in the sewer sector and up to 31 percent in the water sector. The variety of tools available to the water or sewer utility engineer today is remarkably different than it was during the 1960s. However, the average rate of system rehabilitation and upgrading is not adequate to keep pace with increasing needs, quality demands and continually deteriorating systems. The opportunity lies in the fact that while the tools being used today are generally effective, there is still considerable room for improvement in existing technologies and/or development of new technologies. Such improvements or new technologies offer the chance to make the investments in rehabilitation more effective and extend the ability of utilities and local governments to fix larger portions of their systems iii
Page 1 and 2: EPA/600/R-09/048 | May 2009 | www.e
Page 3: Final White Paper on Rehabilitation
Page 7 and 8: FOREWORD The U.S. Environmental Pro
Page 9 and 10: CONTENTS DISCLAIMER ...............
Page 11 and 12: 7.4.3 Demonstration Protocols and M
Page 13 and 14: From this deliberately simplified s
Page 15 and 16: 1.4 History of Wastewater Rehabilit
Page 17 and 18: failure for specific failure mechan
Page 19 and 20: experience). This means that system
Page 21 and 22: applications for rehabilitation und
Page 23 and 24: Table 2. Force Main Systems: Percen
Page 25 and 26: Funding for sewer renovation and ma
Page 27 and 28: Table 3. Main Defects in Gravity Se
Page 29 and 30: step is usually to examine and remo
Page 31 and 32: 3.3.5 Drop Shafts. Drop shafts are
Page 33 and 34: 3.4.2 Inspection and Condition Asse
Page 35 and 36: 4.1 Background 4.0 WATER SYSTEM ISS
Page 37 and 38: external corrosion. Internal corros
Page 39 and 40: The main driver pushing utilities t
Page 41 and 42: standards for pipe bursting and int
Page 43 and 44: 5.0 CURRENT TECHNOLOGIES AND POTENT
Page 45 and 46: wastewater sector. High-build linin
Page 47 and 48: 36 Method Table 7b. Overview of Sew
Page 49 and 50: 38 Method Manhole Parameters ID Dia
Page 51 and 52: Table 10. Novel and Emerging Trench
Page 53 and 54: e too expensive for use in the wast
Page 55 and 56:
Figure 4. Selection of Rehabilitati
Page 57 and 58:
There are many facets to the introd
Page 59 and 60:
7.0 EPA DEMONSTRATION PROJECTS 7.1
Page 61 and 62:
project provides an opportunity to
Page 63 and 64:
for a given technology. The environ
Page 65 and 66:
Trenchless Technology (NASTT), etc.
Page 67 and 68:
• Challenging Pipe Configurations
Page 69 and 70:
9.0 REFERENCES Allouche, E.N., S. A
Page 71 and 72:
APPENDIX A Abbreviations
Page 73 and 74:
NACE National Association of Corros
Page 75 and 76:
Sliplining is a method of pipe reha
Page 77 and 78:
Example technology: Trolining®, Su
Page 79 and 80:
Pipe reaming - HDD equipment is use
Page 81 and 82:
Sliplining is a method of pipe reha
Page 83 and 84:
hand applied procedures. Polyurea c
Page 85 and 86:
APPENDIX D Manhole Rehabilitation T
Page 87 and 88:
ambient temperature (Warren). They
Page 89 and 90:
Grade adjustment ring area seals in
Page 91 and 92:
The installation of CIPP is governe
show all

Rehabilitation of Wastewater Collection and Water Distribution ...

Create successful ePaper yourself

Delete template?

Save as template?