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Kim ey>>> Horn Page 11 To date, the post-treatment system has yielded favorable water quality results which has enhanced the County's control of corrosion within the system. One adverse effect of the carbonic acid and lime slurry process has been the inability to dissolve all of the solids that are present in the lime slurry solution, mainly due to the trace impurities that exist in the lime slurry. Since implementation, IRCU has noted difficulties in maintaining turbidity less than 1 ntu prior to transfer pumping product water to ground storage. This issue is not unique as other Southeastern Florida membrane facilities with this post-treatment stabilization process have experienced the same, or similar impact, of additional turbidity from the lime slurry system. In 2016, IRCU noted sedimentation at the bottom of the ground storage tanks that was not present prior to the lime slurry system. Samples were taken and sent to a lab and appear to be consistent with the lime slurry product sheets. This effort was duplicated by another nearby municipality and the findings were similar in that much of the insoluble matter was primarily calcium, with lower amounts of aluminum, iron, silica and zinc. The following photo illustrates the sediment found at the WTP and re -pump ground storage tank (North Beach). Photo 3 - Ground Storage Tank Sediment 71