title: Evaluation of environmental impacts of two common restoration methodologies for pipes that convey stormwater runoff.
abstract: This study investigated the environmental impact of two commercial stormwater pipe-repair technologies (Ultraliner and Troliner). These technologies use liners believed to contain three plasticizers of potential environmental concern: bisphenol A (BPA), di-(2-ethylhexyl) phthalate (DEHP), and benzyl butyl phthalate (BBP). The release of these two products was investigated both experimentally and mathematically. Kinetic batch experiments were conducted to determine if contaminants were leaching from Ultraliner, Troliner, and the grout (used with Troliner) into water. In all cases for all incubation times up to 48 h, none of the three plasticizers were detected in water in contact with any of the pipe-repair materials. A generic GC-FID scan did not detect any unidentified compounds relative to control samples. In addition, a mathematical model of plasticizer leaching from the pipe-liner material was developed. Under various pipe geometries, simulated aqueous concentrations of the plasticizers were less than regulatory limits.
authors: Department of Civil and Environmental Engineering, University of Virginia, Charlottesville, VA 22904-4742, USA.
authors: Dianjun E
authors: DE
authors: Ren
authors: James A
authors: JA
authors: Smith
mesh_terms: D002849:Chromatography, Gas; D002851:Chromatography, High Pressure Liquid; D004777:Environment; D008962:Models, Theoretical; D014872:Water Movements