Continuous monitoring of water pressure, using up to 12 high-speed pressure transient
data loggers, has been performed for over a year in the distribution system where Payment
et al. conducted their epidemiological studies. The duration of monitoring was divided
into 4 phases with reduced monitoring during winter time. Transient and sustained
negative pressures have been measured in the distribution system due to power failures at
the plant (WTP), closure of a transmission main and localized pipe repairs. Under normal
system operation, a total of 9 low pressure events were recorded at the WTP during the
first year of monitoring (June 2006-June 2007) resulting in 4 confirmed and 5 suspected
transient negative events in the distribution system. Characterization of potential sources
of microbial intrusion was also performed with the investigation of soil and water
samples in pipe trenches and water samples from flooded air-and-vacuum relief valve
chambers. Includes 13 references, table, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 420 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 11 |
| Published : | 11/01/2007 |
