The City of Northampton, Massachusetts began operations of their 6.5 mgd water
treatment plant in January, 2008. Prior to delivering water to its customers, the
Massachusetts Department of Environmental Protection (DEP) required that the
disinfection contact time of the plant's clearwell be determined with a tracer study. The
tracer study was conducted by Metcalf & Eddy in accordance with the guidelines set
forth in the U.S. Environmental Protection Agency's Guidance Manual on Determining Disinfection Contact Time. Because
the plant was not on-line at the time of the tracer study, several constraints were in place
that 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 demonstrates
how T<sub>10</sub>/T was calculated from both the increasing and receding dose tests without
achieving a steady fluoride level between tests. Includes tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 1 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 46 |
| Published : | 11/01/2008 |
