大温哥华地区委托进行了为期18个月的规划和预设计研究，以确定其2500-ML/d（660 mgd）系统的综合水质改善计划的组成部分。这项研究包括三项主要任务:消毒和腐蚀控制设施的预先设计；使用西摩和卡皮拉诺供水水库的平行试验工厂进行为期12个月的试验计划；以及规划未来的过滤厂。这项研究的结果在两个样本中发现了氯、氨、二氧化硫、苏打灰和二氧化碳- 阶段处理方法作为低pH、低碱度供水的推荐消毒和腐蚀控制方案。中试工厂研究证实，使用负载率为22.5 m/h的深床单介质过滤器进行直接过滤，可在各种原水水质条件下提供优异的处理性能和生产率。对臭氧氧化进行了广泛研究，发现臭氧氧化对整体处理性能没有好处。这项研究的一个主要结论是，该地区可以从合并项目中获得显著的成本效益- 西摩和卡皮拉诺供水的ML/d（500 mgd）过滤设施，尽管需要修建一条6.7 km长的岩石隧道来促进这一概念。消毒、腐蚀控制和过滤设施的分阶段改进计划估计资本成本约为4.59亿加元。包括3个参考文献、表格和图表。

The Greater Vancouver Regional District commissioned an 18-month planning and predesign study to define the components in a comprehensive water quality improvement plan for its 2,500-ML/d (660-mgd) system. The study included three primary tasks: predesign of disinfection and corrosion control facilities; a 12-month pilot testing program using parallel pilot plants at the Seymour and Capilano water supply reservoirs; and planning for future filtration plants. The results of the study identified chlorine, ammonia, sulfur dioxide, soda ash, and carbon dioxide in a two-stage treatment approach as the recommended disinfection and corrosion control scheme for the low-pH, low-alkalinity water supplies. The pilot-plant studies confirmed that direct filtration using deep-bed monomedium filters operating at a loading rate of 22.5 m/h provided excellent treatment performance and productivity over a wide range of raw-water quality. Ozonation was studied extensively and found not to be beneficial in the overall treatment performance. A major conclusion of the study was that the district could achieve significant cost benefit from a combined 1,900-ML/d (500-mgd) filtration facility for both the Seymour and Capilano supplies even though a 6.7-km rock tunnel would have to be constructed to facilitate this concept. The phased improvement plan for the disinfection, corrosion control, and filtration facilities has an estimated capital cost of about Can $459 million. Includes 3 references, tables, figures.