本powerpoint演示文稿首先简要概述了明尼苏达州哈钦森市和水处理厂（WTP）的位置。关键问题包括: 超过本规范中规定的铜腐蚀标准 配电系统中的铅和铜规则（LCR）； 两组之间的氯需求量存在显著差异 使用相同供水的两列处理机组； 高铁浓度； 分布系统内的生物生长； 消毒副产物（DBP）的形成；和 老化的设施。通过以下结果解决了关键问题: 达到铜腐蚀标准； 2007年CCR:0.62 mg/L； 无法控制的氯需求； 之前，氯气的使用随着产水量的变化而变化， 现在需要加氯和剩余氯， 氨降低至0.02 mg/L，并且 加氯可控；和 高铁浓度， 原水铁浓度为2.6 mg/L， 现有计划通常将铁控制在0.30 mg/L以下，以及 成品水铁=0.01 mg/L。包括表格、图表。

This powerpoint presentation begins by providing a brief overview of the city of Hutchinson, Minnesota, and the water treatment plant (WTP) site location. Key issues included the following: exceeding copper corrosion standards as defined in the Lead & Copper Rule (LCR) in distribution system; chlorine demands were significantly different between the two treatment trains using the same water supply; high iron concentration; biological growth occurring within distribution systems; disinfection byproduct (DBP) formation; and, aging facilities. Key issues were resolved with the following results: copper corrosion standards achieved; 2007 CCR: 0.62 mg/L; uncontrollable chlorine demands; previously chlorine application varied with water production, now chlorine application H chlorine residual desired, ammonia reduced to 0.02 mg/L, and chlorine feed controllable; and, high iron concentration, Raw Water Iron concentration of 2.6 mg/L, existing plan generally controlled Iron below 0.30 mg/L, and finished water Iron = 0.01 mg/L. Includes tables, figures.