CUIRE Study Finds CIPP Reports Non-Conclusive
4/30/2018
Researchers at the University of Texas at Arlington’s Center for Underground Infrastructure Research and Education and the Institute for Underground Infrastructure in Germany have completed a four-month study on the review of published literature pertaining to chemical emissions of styrene-based resin used in the cured-in-place pipe process, finding that existing steam-cure studies use questionable methodologies and, therefore, their results are not conclusive.
Reasons given for this determination include:
- Because most of the studies measured styrene around the termination manhole, inside the manhole, or inside the sewer pipe itself, maximum values at the outlet point and inside the terminal manhole ranged from 20 to 1,070 ppm, exceeding some exposure limits. However, because workers and the public don’t typically enter or stand directly at the termination manhole in the exhaust plume, this data is flawed.
- Only four of the studies measured concentrations at locations surrounding the terminal manhole (at least 3 ft away), not in the manhole itself or in the exhaust plume. These measurements are not typical of worker exposures and, therefore, additional worker exposure data should be collected to capture variability in source emission rate, meteorological conditions, and the worker’s location with respect to the terminal manhole.
- These earlier studies did not adequately capture variations in emission rates from different kinds of pipes (different diameters, lengths, etc.).
The study began in December 2017 and concluded April 6, 2018.
Related News
From Archive
Sign up to Receive Our Newsletter
- Fatal trench collapse halts sewer construction in Massachusetts; two workers hospitalized
- Alaska LNG pipeline could require 7,000 workers at peak construction, developers say
- Ohio trench collapse kills one worker, injures two during pipe installation
- Elon Musk's Boring Co. fined for dumping drilling waste into Vegas sewer system
- $1.4 billion Midwest pipeline expansion to move more Canadian oil to U.S. Gulf
- Glenfarne Alaska LNG targets late-2026 construction start for 807-mile pipeline project
- Fatal trench collapse halts sewer construction in Massachusetts; two workers hospitalized
- Massive water line failure leaves majority of Waterbury without service
- Infrastructure failure releases 100,000 gallons of wastewater in Houston; repairs ongoing
- Pennsylvania American Water launches interactive map to identify, replace lead water service lines
Comments