Evaluation of Potential Release of Organic Chemicals in the Steam Exhaust and Other Release Points during Pipe Rehabilitation Using the Trenchless Cured-In-Place Pipe (CIPP) Method

摘要

The Trenchless Cured-in-Place Pipe (CIPP) process involves a liquid thermoset resin-saturated material that is inserted into the existing pipeline by hydrostatic or air inversion, or by mechanically pulling-in and inflating. The liner material is cured-in-place using hot water, steam or using ultraviolet (UV) light resulting in the CIPP product. In response to the growing usage of CIPP and recent industry reports, National Association of Sewer Service Companies (NASSCO) issued a request for proposals to facilitate a formal review of potential health impacts associated with CIPP installations with steam cure. The objective of this paper is to present literature review results related to potential release of organic compounds during pipe renewal/rehabilitation using the steam-cured CIPP method. It was found that existing studies do not adequately capture worker exposures or levels in the surrounding areas to which workers or citizens may be exposed. The reviewed papers had questionable methodologies, and therefore, the results presented are not conclusive. It is recommended that additional sampling and data evaluation and analysis be carried out as a second phase of this study.