AWWA ACE65293

This powerpoint presentation begins by listing the general characteristics of metallic pipe surfaces, followed by general information on iron corrosion, oxidant research, practical issues of contaminant accumulation, particle mobilization, desorption, nitrification issues, aluminum interactions, and a table of LSL Examples. The presentation has a second section called Domestic/Commercial Plumbing that presents major issues that include: prevalence and stability of PbO₂ deposits; serious gaps in knowledge of phosphate solids; gaps remain for Pb hydroxycarbonate solubility; long-term leaching factors responsible for copper pinhole leaks; role of Mn, Fe, Al, Ca and other deposits on surface; what is the kinetic or solubility role of non-carbonate anions, such as chloride and sulfate; solubility and kinetics of Fe, Mn, Cu, Al, Pb silicates; and, the relationship of pipe age and standing time on copper levels.