Retrospective Evaluation of Cured-in-Place Pipe - (NEPIS)(EPA ...

CONTENTS
DISCLAIMER ............................................................................................................................................. II
ABSTRACT ................................................................................................................................................ III
ACKNOWLEDGMENTS .......................................................................................................................... IV
EXECUTIVE SUMMARY ......................................................................................................................... V
CONTENTS ............................................................................................................................................. VIII
APPENDICES .......................................................................................................................................... XII
FIGURES .................................................................................................................................................. XII
TABLES .................................................................................................................................................. XIV
ABBREVIATIONS AND ACRONYMS ................................................................................................ XVI
1.0: INTRODUCTION ................................................................................................................................ 1
2.0: CIPP TECHNOLOGY DEVELOPMENT ........................................................................................... 4
3.0: DEVELOPMENT OF CIPP EVALUATION METHODOLOGY..................................................... 15
4.0: CITY OF DENVER RETROSPECTIVE STUDY ............................................................................. 23
5.0: CITY OF COLUMBUS RETROSPECTIVE STUDY ....................................................................... 63
6.0: REVIEW AND COMPARISON ACROSS THE FOUR SITES ........................................................ 93
7.0: RECOMMENDED TEST PROTOCOL FOR FUTURE USE ......................................................... 103
8.0: REPORT ON INTERNATIONAL SCAN ACTIVITIES AND FINDINGS ................................... 108
9.0: SUMMARY AND RECOMMENDATIONS ................................................................................... 126
10.0: REFERENCES ............................................................................................................................... 130
1.0: INTRODUCTION .............................................................................................................................. 1
1.1 Organization of Protocol Development and Field Studies ........................................................... 2
1.2 Organization of the Report ........................................................................................................... 3
2.0: CIPP TECHNOLOGY DEVELOPMENT ....................................................................................... 4
2.1 Introduction .................................................................................................................................. 4
2.2 Cured-in-Place Pipe ...................................................................................................................... 5
2.2.1 Historical and Commercial Background ......................................................................... 5
2.2.2 The CIPP Process ............................................................................................................ 6
2.2.3 Installation Method: Inversion or Pull-In ........................................................................ 9
2.2.4 Tube Construction ......................................................................................................... 10
2.2.5 Choice of Resins for CIPP ............................................................................................. 10
2.2.6 Thermal Curing Process ................................................................................................ 11
2.2.7 Ultraviolet Light Cured Liners ...................................................................................... 12
2.2.8 Emerging and Novel CIPP Technologies ...................................................................... 12
2.3 North American Experience with CIPP ...................................................................................... 13
2.3.1 Experiences and Case Histories ..................................................................................... 13
2.3.2 Testing and QA/QC ....................................................................................................... 13
2.3.3 Environmental Issues ..................................................................................................... 14
3.0: DEVELOPMENT OF CIPP EVALUATION METHODOLOGY .............................................. 15
3.1 Review of Potential Alternatives ................................................................................................ 15
3.2 Goals for a Specific Retrospective Evaluation Using the Draft Protocols ................................. 16
3.3 Preliminary Outline of Anticipated Protocol for CIPP Evaluation ............................................. 16
3.3.1 Identification of Municipal Partners .............................................................................. 16
3.3.2 Identification of Segments for Evaluation ..................................................................... 17
3.3.3 Availability of Historical Data ...................................................................................... 17
3.3.4 Retrieval of Field Samples (Dig up and Replace Sample) ............................................ 18
3.3.5 In-Situ Evaluation .......................................................................................................... 18
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