AWWA WQTC69454

This powerpoint presentation begins by providing a brief overview of green construction and bacterial growth. The University of North Carolina (UNC) Problem Identification inNew Construction includes: taste and odor complaints after occupancyof two buildings; first draw samples had undetectabledisinfectant levels; and,testing to evaluate disinfectant issue. Suspected factors contributingto chloramine loss included:excess residence time; high water temperatures (18-30ºC); and, new copper pipe. Remediation efforts included:increased water turnover to raisechloramine residual on a case-by-case basis; automated flushing system (accounts for < 1%of total water use); and,replaced water fountains with integralchiller units to reduce water temperature. Presentation conclusions indicate the following:construction practices that incorporate waterconservation in plumbing can cause aestheticproblems if design is not changed to controlresidence time;rapid chloramine decay in new plumbing andwarmer temperatures can cause high bacterialgrowth; and,more research is needed on effects of materials and onplumbing design and re-growth to avoid problems. Includes figures.

Product Details

Edition:

Vol. - No.

Published:

11/01/2008

Number of Pages:

26

File Size:

1 file , 2.2 MB