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Pipe Scale Analyses for CCT Evaluation
Citation:
DeSantis, Mike. Pipe Scale Analyses for CCT Evaluation. EPA Region 5 LCR-OCCT Workgroup virtual meeting, NA, Virtual, August 12, 2020.
Impact/Purpose:
The analysis of the surface of extracted lead service lines (LSLs) using an array of analytical techniques can accurately identify the solid phases on the pipe surfaces, and thus give insight into the real-world functioning chemical mechanisms that govern solubility and metal release. This presentation describes the steps taken by US EPA’s ORD to obtain scale samples, prepare them for analysis, and the type of information that can be collected from the various analytical techniques. Several case studies illustrate how to utilize LSL scale analyses to assist in the decision-making process for state drinking water regulators, including limitations in both the methodology and interpretation of resulting data
Description:
The analysis of the surface of extracted lead service lines (LSLs) using an array of analytical techniques can accurately identify the solid phases on the pipe surfaces, and thus give insight into the real-world functioning chemical mechanisms that govern solubility and metal release. This presentation describes the steps taken by US EPA’s ORD to obtain scale samples, prepare them for analysis, and the type of information that can be collected from the various analytical techniques. Several case studies illustrate how to utilize LSL scale analyses to assist in the decision-making process for state drinking water regulators, including limitations in both the methodology and interpretation of resulting data