Retrospective Evaluation of Cured-in-Place Pipe - (NEPIS)(EPA ...
Retrospective Evaluation of Cured-in-Place Pipe - (NEPIS)(EPA ...
Retrospective Evaluation of Cured-in-Place Pipe - (NEPIS)(EPA ...
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5.2.18 Raman Spectroscopy. The Raman spectroscopy plots for the Columbus 8-<strong>in</strong>. l<strong>in</strong>er sample<br />
are shown <strong>in</strong> Figure 5-27. Plots are shown for the virg<strong>in</strong> res<strong>in</strong>, and several locations on the <strong>in</strong>side and<br />
outside l<strong>in</strong>er surfaces. There is one clear difference <strong>in</strong> the presence <strong>of</strong> peaks between the base res<strong>in</strong><br />
samples and the exhumed specimens, which was not seen <strong>in</strong> the Denver samples. A discussion <strong>of</strong> the<br />
possibilities for us<strong>in</strong>g Raman spectroscopy for l<strong>in</strong>er evaluation is given <strong>in</strong> Section 6.<br />
5.3 Site 2: 36-<strong>in</strong>. Brick Sewer<br />
Figure 5-27. Raman Spectra for the Columbus 8-<strong>in</strong>. L<strong>in</strong>er<br />
5.3.1 Host <strong>Pipe</strong> and L<strong>in</strong>er Information. The CIPP l<strong>in</strong>er sample tested was exhumed from a 36<strong>in</strong>.<br />
brick sewer pipe <strong>in</strong> Columbus, OH, which was <strong>in</strong>stalled <strong>in</strong> 1868 and rel<strong>in</strong>ed with a CIPP l<strong>in</strong>er <strong>in</strong> 1989<br />
under an emergency modification to Project No. 710404.2 carried out by the City <strong>of</strong> Columbus,<br />
Department <strong>of</strong> Public Utilities, Division <strong>of</strong> Sewerage and Dra<strong>in</strong>age. The orig<strong>in</strong>al contract work <strong>in</strong>volved<br />
227 ft <strong>of</strong> CIPP l<strong>in</strong><strong>in</strong>g <strong>of</strong> an adjacent 24 <strong>in</strong>. diameter pipel<strong>in</strong>e 14.5 ft deep with 15 mm thick Insitutube.<br />
The emergency modification <strong>in</strong>cluded the <strong>in</strong>stallation <strong>of</strong> 98 ft <strong>of</strong> <strong>in</strong>version-<strong>in</strong>stalled polyester res<strong>in</strong> l<strong>in</strong><strong>in</strong>g<br />
<strong>in</strong> the sewer at Gay Street. The l<strong>in</strong>er thickness was unknown, but it was assumed to be similar to the<br />
adjacent 24 <strong>in</strong>. project. The CIPP-repaired section lies under a two-way, two lane road; it is a curved<br />
section that extends from the south side <strong>of</strong> Gay Street and turns north on Pearl Street. The contractor for<br />
the CIPP repair was Insituform East. No material test<strong>in</strong>g was specified <strong>in</strong> the orig<strong>in</strong>al contract or <strong>in</strong> the<br />
emergency modification.<br />
5.3.2 Sample Recovery. On-site personnel were present from the City <strong>of</strong> Columbus, Battelle,<br />
Jason Consult<strong>in</strong>g, and Reynolds Inl<strong>in</strong>er, Inc. The Reynolds personnel entered the pipel<strong>in</strong>e, cut out a 52<br />
<strong>in</strong>. × 24 <strong>in</strong>. rectangular sample (Figure 5-28) and prepared it for shipment. The sample was collected<br />
from approximately 2 ft upstream (south) <strong>of</strong> the access manhole (MH 0003C0008) at the 1 to 4 o’clock<br />
position approximately 2 <strong>in</strong>. above the flow l<strong>in</strong>e.<br />
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