本powerpoint演示文稿首先简要概述了罗利市的配水系统、受硝化作用影响的水质参数、当前的总大肠菌群规则（TCR）以及未来可能的监管合规性。介绍了CDM于2004年开始的大肠菌群研究，以及水质监测计划和分配系统现场研究。概述了2005年CDM分配系统水质现场研究，包括采样计划改进、TCR采样现场计划更新、研究完成和变更总结 实施。取得的成果包括: 大肠菌群阳性数量急剧下降； 改善水厂内部的沟通 分部，以及水厂分部和其他 使用地理信息系统的公共事业部门； 实验室数据的跟踪和趋势分析；和 当2007-08年发生旱灾时，我们做了更好的准备。过去和未来的关键项目总结 介绍了改善TCR合规性，包括以下内容: 余氯浓度高； 额外的监控和增强的操作 分配系统，以保持油箱翻转和 冲洗死胡同，观察硝化作用； 提高了全系统冲洗量 通过采样点、死角冲洗的游离氯；更新TCR抽样计划； 改进隔离区的模型和识别； 制定了部门操作程序 大肠菌群发生调查及预防措施 部门与GIS共享相关信息（spot） 法拉盛，主要休息，样品计划，新生产线， 回流、管道）应急小组成立； 扩展交叉连接控制程序，站点 管道调查； 执行硝化控制程序（较低） 氨、冲洗等）；和 腐蚀控制和基础设施升级 维修包括数字。

This powerpoint presentation begins by providing a brief overview of the City of Raleigh distribution system, water quality parameters affected by nitrification, the current Total Coliform Rule (TCR), and possible future regulatory compliance. The beginning of coliform studies by CDM in 2004 is presented, along with a water quality monitoring plan, and distribution system field studies. A 2005 CDM distribution system water quality field study is outlined, including sampling plan improvements, TCR sample site plan update, and study completion and summary of changes implemented. Results achieved include the following: dramatic decline in number of coliform positives; improved communication within the Water Plant Division, and between the Water Plant Division and other Public Utilities Divisions using GIS; tracking and trending of laboratory data; and, better prepared when drought hit in 2007-08. Summary of key past and future items that improve TCR compliance is presented, including the following: high residual chlorine concentrations; additional monitoring and enhanced operation of distribution system to keep tanks turned over and dead-ends flushed and to watch for nitrification; enhanced full-system flushing with elevated amounts of free chlorine flushed though sample sites, deadends; updated TCR Sampling Plan; improved model and identification of isolation zones; developed a Department Operating Procedure for coliform occurrence investigation and bridge department sharing of relevant information with GIS (spot flushing, main breaks, sample plans, new lines, backflow, plumbing), Response Team formed; expand cross-connection control program, site plumbing investigations; implement nitrification control procedures (lower ammonia, flushing, etc.); and, corrosion control and infrastructure upgrades and maintenance. Includes figures.