| Title: | Occurrence of chlorinated volatile organic compounds (VOCs) in a sanitary sewer system: Implications for assessing vapor intrusion alternative pathways |
| Author(s): | Roghani M; Jacobs OP; Miller A; Willett EJ; Jacobs JA; Viteri CR; Shirazi E; Pennell KG; |
| Address: | "University of Kentucky, Department of Civil Engineering, Lexington, KY 40506, United States. Clearwater Group, 229 Tewksbury Avenue, Point Richmond, CA 94801, United States. Entanglement Technologies, 42 Adrian Court, Burlingame, CA 94010, United States. University of Kentucky, Department of Civil Engineering, Lexington, KY 40506, United States. Electronic address: kellypennell@uky.edu" |
| DOI: | 10.1016/j.scitotenv.2017.10.205 |
| ISSN/ISBN: | 1879-1026 (Electronic) 0048-9697 (Print) 0048-9697 (Linking) |
| Abstract: | "Sewer systems have been recently recognized as potentially important exposure pathways to consider during vapor intrusion assessments; however, this pathway has not been well-characterized and there is need for additional information about the occurrence of volatile organic compounds (VOCs) in sewer systems. This paper reports the results of sewer gas sampling conducted in a sanitary sewer over the years of 2014-2017. Sewer gas samples were collected and analyzed using several different techniques, including TO-15 (grab), TO-17 (passive), Radiello(R) (passive) and a novel continuous monitoring technique, the Autonomous Rugged Optical Multigas Analyzer (AROMA). The applicability of each of the different approaches used in this study is discussed in the context of investigating sanitary sewers as a vapor intrusion alternative pathway. The data confirmed that trichloroethylene (TCE) concentrations in sewer gas were detected adjacent to and extending hundreds of feet away from a previously defined vapor intrusion area, where TCE was a primary contaminant. TCE concentrations detected in sewer gas ranged from non-detect to 1600mug/m(3). Temporal variability was observed in TCE concentrations over timescales that ranged from minutes to months to years at discrete sampling locations. Spatial variability in sewer gas concentrations was also observed throughout the study area. Temporal and spatial variability may be caused by groundwater contamination sources in the study area, as well as sewer gas transport mechanisms" |
| Keywords: | Sampling methods Sewer systems Trichloroethylene Vapor intrusion; |
| Notes: | "PubMed-not-MEDLINERoghani, Mohammadyousef Jacobs, Olivia P Miller, Anthony Willett, Evan J Jacobs, James A Viteri, C Ricardo Shirazi, Elham Pennell, Kelly G eng P42 ES007380/ES/NIEHS NIH HHS/ R44 ES022538/ES/NIEHS NIH HHS/ Netherlands 2017/11/18 Sci Total Environ. 2018 Mar; 616-617:1149-1162. doi: 10.1016/j.scitotenv.2017.10.205. Epub 2017 Nov 14" |
