This powerpoint presentation begins by providing a brief overview of the study issue:
ZOP expensive and results in discharge of zinc into environment;
a change in corrosion control could trigger a 6-fold increase in
monitoring.
The study solution included the following:
conduct paper study on effect of zinc and phosphate on corrosion
control;
conduct pipe loop testing to examine reduced and non-zinc
orthophosphate alternatives; and,
convert systems gradually over time to orthophosphate, using the
routine monitoring to detect any changes in lead or copper levels. The testing program is presented, along with a statistical analysis, a summary of cost benefits and potential benefits, ongoing issues and research, and conversion plans. Includes tables, figure.