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Two Decades into the LCR: What We Do and Still Don’t Know to Solve Lead Problems - abstract
Citation:
Schock, M. Two Decades into the LCR: What We Do and Still Don’t Know to Solve Lead Problems - abstract. Presented at New England Water Works Association 2015 Spring Joint Regional Conference & Exhibition, Worcester, MA, April 01 - 02, 2015.
Impact/Purpose:
the purpose is to give water utilities and their consultants the latest reseaerch information on what water chemistry and treatment factors are impacting the control of lead release from drinking water plumbing materials. They will be guided on good practices in setting up appropriate studies, how to anticipate possible treatment conflicts, and how to do diagnostic sampling to better assess location in the plumbing of maximum lead release and exposure of consumers.
Description:
Site selection and sampling protocol biases in LCR samplingunderestimate peak lead and copper concentrations whilemissing erratic lead release episodes resulting from distributionsystem chemical and physical disturbances. Possible sitetargeting and sampling protocol changes could force future“reoptimization” of LCR treatment. Current knowledge versusguidance gaps surrounding potential reoptimization strategies willbe presented focusing on four scenarios: pH adjustment changedto orthophosphate dosing; disinfectant or other oxidation processchanges; significant non-Pb scale components; and disturbancesfrom infrastructure O&M.
URLs/Downloads:
http://www.newwa.org/Portals/0/Spring%20Conference/2015/2015%20Conference%20Program%202015-02-12.pdf