NASSCO responds to Purdue University’s CIPP findings
The National Association of Sewer Service Companies (NASSCO) has responded to Purdue University’s findings on cured-in-place pipe (CIPP), refuting the report’s link between exposure to styrene and cancer in humans.
Purdue University Assistant Professor of Engineering Dr Andrew J. Whelton recently released a report, completed by his students, titled ‘Worksite Chemical Air Emissions and Worker Exposure during Sanitary Sewer and Stormwater Pipe Rehabilitation Using Cured-in-Place-Pipe (CIPP)’.
Published on 26 July 2017 in the Environmental Science & Technology Letters, a publication of the American Chemical Society, NASSCO said it is clear that the guidelines and specific quality and safety protocols were not utilised during the testing performed, nor referenced in the study by the university.
In the response, published on the association’s website, NASCCO said, “For over 35 years NASSCO has been proactive in the ongoing development and promotion of health and safety requirements for proper handling of the CIPP process.
“For the past decade NASSCO has been training inspectors on the proper health and safety measures for CIPP projects via the Inspector Training and Certification Program (ITCP).
“NASSCO’s ‘Guideline for the Use and Handling of Styrenated Resins in Cured-in-Place-Pipe’, first published in 2008, contains detailed information and has been in the process of update for the past several months.”
The release of the next edition will contain even more specifics regarding the proper handling of resins.
“This (the report) is of great concern to NASSCO and other organisations aligned to our industry that continually use, monitor and evaluate the effectiveness and safety levels of CIPP technology.
“It is difficult for us to understand how a representative team from a reputable university would not fact check their information and assumptions before publishing such critical information to the public.
“NASSCO has been proactive in its willingness to provide quality information and feedback for these studies.
“In fact, on February 23, 2016, long before this report was published, NASSCO contacted Dr Whelton regarding an earlier study to request a meeting to share information and discuss the research topic, as well as the disputed data, with the ultimate goal to share a joint understanding of the data that were developed by the research.
“Dr Whelton did not respond to the invitation; however, he did attend an ITCP class in January 2017 where the CIPP process was presented for inspection personnel.
“After the instructor presented to the class the current best practices for the safe installation of CIPP, no comments or suggestions were offered by Dr Whelton on this subject.
“Purdue University then proceeded to publish the same disputed information and additional findings without any apparent peer review, and did not include the resources readily available from NASSCO.
“Further, there was still no communication with NASSCO or, to our understanding, other organisations that could have provided excellent feedback and supportive data to provide a more accurate portrayal of CIPP technology.
“A review of the data released in the initial Purdue study indicated a number of inconsistencies that had not been experienced or documented previously in the industry.
“This is based on extensive testing performed around the world. To our understanding, these data were not considered before coming to a final conclusion or publication of the report.
“NASSCO takes accuracy of information very seriously and has uncovered much research pertaining to the CIPP installation process.
“This research comes from a number of reliable sources, including studies performed by leading industry contractors and other organisations in Europe, Canada and the United States, as well as several large agencies, including Caltrans.
“Overall, the extensive scientific data provide no consistent evidence for a link between exposure to styrene and cancer in humans.”
Click here to read NASSCO’s full response the Purdue University publication.
For more information visit the NASSCO website.
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