June 2010
Volume 52 Number 6
 
Cover
GAED Test Method: Optimum Time for GAC Replacement in Potable Water Treatment Plants
by Henry Nowicki, H. George Nowicki, Wayne Schuliger and Barbara Sherman  Pages: 24-28
Granular activated carbon (GAC) does not last forever in a water treatment plant (WTP), does need to be periodically monitored for performance, and should be replaced with fresh unused or reactivated GAC.   read more
 
Features
Water Analysis as a Diagnostic Tool
by Emily Bolda, CWS-VI  Pages: 30-34
In the March issue of WC&P, I discussed water analysis and how several analytical methods are performed.   read more
 
IEx-treme Softening: Are There Upper Limits on TDS for Conventional Softeners?
by C.F. 'Chubb' Michaud, CE, CWS-VI  Pages: 36-40
The conventional cation exchange softener can soften seawater and can also be regenerated with seawater. How does this work? It's called equilibriumread more
 
More Than One Road to Efficiency
by E. Allan Horner, CWS-III  Pages: 42-44
For years, water softener control valves and media manufacturers have been pushed by customers and legislation to achieve greater water and salt efficiency.   read more
 
Web Exclusive
Columns
Dealer Profile: Highland Water's Success Belies A Simple Beginning
by Denise M. Roberts  Pages: 46-48 read more
 
Executive Insight: Sid Fly -- The Water Guy for Manufacturers
by Denise M. Roberts  Pages: 50-51 read more
 
Water Matters: Testing Manufacturers' Claims on Activated Carbon Systems
by Rick Andrew  Pages: 52-54 read more
 
On Tap: Mysterious Microbe in Water Challenges the Very Definition of a Virus
by Kelly A. Reynolds, MSPH, Ph.D.  Pages: 56-58 read more
 
Viewpoint: No vacation for the industry
by Kurt C. Peterson, Publisher  Pages: 6 read more