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<br /> <br />The expected benefits of cleaning media include lower head (or pressure) loss (which <br />often results in longer filter runs), improved backwash air and water distribution and <br />extended media lifetime. Additionally, cleaning media typically loosens filter beds so that <br />the accumulated sludge can be washed out. Cleaning the filters helps ensure reliable <br />performance through periods of poor source water quality and peak‐demand, when <br />operational problems due to media fouling usually first appear. <br /> <br />In conjunction with Blue Earth Labs’ Filter Fit® filter wall cleaner, Top Ultra™ storage <br />tank cleaner and the addition of Clearitas® deposit control products in the distribution <br />system, the procedure evaluated in this report can help reduce disinfection byproduct <br />accumulation and chlorine demand by optimizing filtration and removing fouling from the <br />entire water system. <br /> <br /> <br />Pretreatment of Filter Media <br /> <br /> <br />Post Treatment of Filter Media <br /> <br />Staff received a quote from Hawkins Water Treatment Group of St. Paul, MN to clean <br />the filter media at Water Treatment Plant #2 for $7,140.00, and includes the following: <br /> <br />1. Two thousand Pounds of neXt® for the application of a 2x cleaning dose to <br />four (4) pressure filter cells as referenced above. <br />2. The services of one (1) Blue Earth Labs’ representative to supervise, direct <br />and assist for three (1) man days for the cleaning of one (1) filter cell. <br />3. One (1) post-cleaning lab analysis for validation of the field application. <br />4. Blue Earth Labs shall provide technical direction for the proper use of <br />chemistry and job execution. <br />