NASSCO Updates CIPP Safety Guidelines

The new guidelines take into account a study conducted by Louisiana Tech University’s Trenchless Technology Center into the safety of emissions resulting from styrene-based resins and the steam-cured CIPP process

NASSCO Updates CIPP Safety Guidelines

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The National Association of Sewer Service Companies (NASSCO) continues its work ensuring that it provides the best possible safety information for CIPP contractors.

NASSCO recently released the full report from a study it commissioned from Louisiana Tech University’s Trenchless Technology Center concerning the safety of emissions resulting from styrene-based resins and the steam-cured CIPP process.

With the help of its Pipe Rehabilitation Committee, CIPP Safety Workgroup and Health and Safety Committee, NASSCO has now used those findings from the study to update its Guideline for the Safe Use and Handling of Styrene-Based Resins in Cured-in-Place Pipe.

The NASSCO committees also collaborated on a new informational flyer titled “What’s That Odor?” The flyer is available for contractors to share with private property owners who may have concerns regarding the smell associated with styrenated resins used in the steam-curing process.

The guideline, informational flyer and other information are available to the public for download at, a resource that NASSCO plans to continue to grow as research expands.

The Trenchless Technology Center’s study marked Phase 2 of the research, which included field studies in a variety of geographic locations, testing different liner dimensions, conditions and worker exposure.

Based on the recommendations from that report, a third phase of the study is currently underway. It will focus on task-oriented worker exposure to emissions to identify certain tasks within the typical eight-hour shift window that could pose health risks; better understanding of the dispersion of styrene from the liner truck after opening; and the correlation of the number of liners being stored on the truck, the liner sizes, and the duration the liners have been on the truck with emission concentrations.


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