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AWWA DSS69201
- A Time-Saving Method for Getting More Data Out of Your Tracer Studies
- Conference Proceeding by American Water Works Association, 11/01/2008
- Publisher: AWWA
$12.00$24.00
The City of Northampton, Massachusetts began operations of their 6.5 mgd watertreatment plant in January, 2008. Prior to delivering water to its customers, theMassachusetts Department of Environmental Protection (DEP) required that thedisinfection contact time of the plant's clearwell be determined with a tracer study. Thetracer study was conducted by Metcalf & Eddy in accordance with the guidelines setforth in the U.S. Environmental Protection Agency's Guidance Manual on Determining Disinfection Contact Time. Becausethe plant was not on-line at the time of the tracer study, several constraints were in placethat limited the amount of time and the flow rate at which the study could be conducted.This paper presents details on an efficient approach that M&E used and demonstrateshow T<sub>10</sub>/T was calculated from both the increasing and receding dose tests withoutachieving a steady fluoride level between tests. Includes tables, figures.
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