RAPID: Chemical Air Emissions from Cured-in-Place-Pipe (CIPP) Pipe Repair Activity

RAPID：现场固化管道 (CIPP) 管道修复活动中的化学气体排放

• 批准号: 1624183
• 负责人: Andrew Whelton
• 金额: $ 5万
• 依托单位: Purdue University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-03-15 至 2017-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1624183&HistoricalAwards=false
• 关键词: RAPID; Chemical; Air; Emissions; Cured

1624183WheltonCities and utilities across North America are repairing millions of miles of crumbling sewer pipes using the cured-in-place-pipe "trenchless" renewal technique. At the same time, state transportation agencies across the nation are also relying on CIPP for repairing millions of miles of stormwater culverts. The cured-in-place-pipe repair method involves the installation of a resin impregnated fabric into the deteriorating pipeline or culvert followed by curing in situ with heat (hot water or steam) or ultraviolet light. Cured-in-place-pipe is created by the crosslinking of a polymer resin. Evidence indicates that chemical emissions from steam and hot water cured cured-in-place-pipe sewer pipe repair activities can pose a risk to human health and the environment. The project goal is to understand chemical air emissions from steam cured cured-in-place-pipe installations, one of the most popular cured-in-place-pipe technologies.A December 2015 chemical emission study of three steam cured cured-in-place-pipe installation sites in a U.S. city indicated styrene was emitted into the air at greater than 1,000 ppm, exceeding all regulatory workplace exposure standards. Levels reported far exceeded the International Toxicity Estimates for Risk value of 20 ppm for the most susceptible population such as children. Styrene is one ingredient of steam cured cured-in-place-pipe, nearly 50% w/w in the uncured resin, and a volatile organic compound (VOC). Styrene, a carcinogen (NTP 2015), has an odor detection limit of 0.16 ppm. Steam cured cured-in-place-pipe is one of the most common sewer pipe and culvert repair methods in use today due to its low cost. The proposed work is urgently needed and will provide a better understanding of cured-in-place-pipe site chemical air emissions. Without this project: (1) risks posed to the environment and persons near cured-in-place-pipe installation sites will continue to be poorly defined, and, (2) cities, utilities, and state transportation agencies cannot implement engineering controls that best protect the environment or human health. This project is in response to the scientific needs of municipalities, utilities, and transportation agencies across the nation who are rehabilitating deteriorated water infrastructure, specifically pipelines and culverts. Cured-in-place-pipe is increasingly being installed throughout the U.S. for stormwater culvert and sewer pipe repair applications. New evidence suggests that cured-in-place-pipe installation activity can emit the hazardous air pollutant styrene, among other volatile organic compounds into the air exceeding workplace exposure standards and it is most common that cured-in-place-pipe emissions are poorly controlled. Currently, there is no reliable data set of time-resolved and volatile organic chemical species emissions from cured-in-place-pipe sites. In light of the growing number of emergency response incidents and population health impacts prompted by cured-in-place-pipe chemical emissions, there is an urgent need for the proposed study. Utilities, cities, and state transportation agencies do not have the information needed to develop construction specifications and engineering control strategies that limit chemical air emissions from cured-in-place-pipe sites. Results will fill a knowledge-gap that inhibits infrastructure owners and managers from better protecting the environment and nearby population from chemical air emissions. This project provides an exceptional STEM learning opportunity for Purdue University students.

1624183北美的Wheltoncities和公用事业正在使用现场固化的“ Trencheless”更新技术来修复数百万英里的下水道管道。同时，全国各地的州运输机构也依靠CIPP来修理数百万英里的雨水涵洞。固化的管道修复方法涉及将树脂浸渍织物安装到恶化的管道或涵洞中，然后用热量（热水或蒸汽）或紫外线固化。通过聚合物树脂的交联产生了固化的管道。有证据表明，蒸汽和热水固化的地面填充管道管道维修活动的化学排放可能会对人类健康和环境构成风险。该项目的目标是了解蒸汽固化的地固化在现场式装置中的化学空气排放，这是最受欢迎的地固化的式式式技术之一。2015年12月，一项2015年12月，在美国城市，三种蒸汽固化的地面固化的地面固化的地理固化的固化装置的化学排放研究表明，苯乙烯表明，苯乙烯被大于1,000 PPM的空气散发到超过1,000 PPM的空气中，超过了所有监管。报告的水平远远超过了最易感人群（例如儿童）风险价值为20 ppm的国际毒性估计。苯乙烯是蒸汽固化的地面管的一种成分，在未经许可的树脂中近50％w/w和挥发性有机化合物（VOC）。苯乙烯是一种致癌物（NTP 2015），其气味检测极限为0.16 ppm。蒸汽固化在现场管道上是最常见的下水道管道之一，并且由于其低成本而使用的涵洞维修方法。迫切需要拟议的工作，并将更好地理解对现场式现场化学空气排放。没有这个项目：（1）对环境和附近的固化安装站点附近的人带来的风险将继续定义不明，（2）城市，公用事业和国家运输机构无法实施最能保护环境或人类健康的工程控制。该项目响应全国各地的市政当局，公用事业和运输机构的科学需求，他们正在恢复恶化的水基础设施，特别是管道和涵洞。在整个美国，越来越多地安装了固化的管道，用于雨水涵洞和下水道管道维修应用。新的证据表明，固化的管道安装活动可以发出危险的空气污染物苯乙烯，除其他挥发性有机化合物外，超过工作场所暴露标准的空气中，最常见的是，固化的地面排放量不佳。当前，没有可靠的数据集，这些数据集的时间分辨和挥发性有机化学物种从地面固化的地点排放。鉴于越来越多的紧急响应事件和人口健康的影响造成了固化的化学排放，因此迫切需要进行这项研究。公用事业，城市和国家运输机构没有开发施工规范和工程控制策略所需的信息，这些策略限制了从现场固化的地点进行化学空气排放。结果将填补一个知识差距，该知识空间抑制基础设施所有者和经理免受更好地保护环境和附近人群免受化学空气排放的影响。该项目为普渡大学的学生提供了出色的STEM学习机会。