This report identifies and describes good practices that can be implemented by water utilities for the prevention of microbiological contamination associated with the installation, rehabilitation, and repair of water mains. Chapters overview and discuss sources of microbiological contamination in water mains, methods and constraints for controlling microbiological contamination in water mains, and potential alternative methods and products for controlling contamination, and describe field evaluations at utilities and good practices for contamination control. Some 200 pages of appendices provide example standards, assessment and maintenance procedures, training materials, and contracts. This report lacks a subject index. Annotation c. Book News, Inc., Portland, OR (booknews.com)