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NASSCO awards TTC emissions study

The National Association of Sewer Service Companies (NASSCO) has awarded a comprehensive emissions study into cured-in-place pipe (CIPP) to the Trenchless Technology Center (TTC) at Louisiana Tech University.

The research project – which is Phase 2 of a larger study – follows a four month review of the existing literature about chemical emissions during CIPP installations, which returned non-conclusive results in April.

On 3 May, NASSCO opened a CIPP emissions study request for proposals to “evaluate the potential release of organic chemicals in the steam exhaust and other release points during pipe rehabilitation using the trenchless CIPP method”.

After reviewing the submitted proposals, NASSCO awarded the research project to the TTC, which will partner with the US Army Engineers’ Research Development Center for the study.

“As the North American Society for Trenchless Technology (NASTT) representative on the workgroup for the CIPP Emission Testing project, I am delighted with the selection of TTC as the most meritorious candidate for this important research,” said NASTT Executive Director Mike Willmets.

“For nearly 30 years, TTC has contributed novel and significant work to further the advancement of the trenchless industry.

“This will be an exciting assignment with definitive results and will undoubtedly have a far-reaching impact on worksite safety.”

NASSCO Executive Director Sheila Joy said it was a priority for industry associations and organisations join forces and present a unified voice to best serve the industry.

“TTC’s proposal to partner with the US Army Corps of Engineers demonstrates their understanding of this concept,” said Ms Joy.

“We all share the same goal when it comes to the safety of our workers and communities, and this study is a perfect example of how unification will reveal the information we need to make smarter decisions for our industry as a whole.”

Scope of the study

The upcoming project will measure styrene and other organic compound emissions at six CIPP installation sites, evaluating varying pipe lengths and diameters to accurately capture the variation in emission.

Measurements will be conducted before, during and after curing at the termination manhole, as well as various locations in the surrounding outside area and inside nearby buildings, while worker exposure will be measured using personal exposure monitors.

Dispersion modelling be used to estimate compound concentrations at a large number of locations for a wide variety of meteorological conditions; the measured and modelled concentrations will then be compared to appropriate health-based action levels to determine any potential health risks.

For more information visit the NASSCO website.

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