Drinking Water Distribution Systems

Drinking Water Distribution Systems
Author: National Research Council
Publisher: National Academies Press
Total Pages: 404
Release: 2006-12-22
Genre: Science
ISBN: 0309133955

Protecting and maintaining water distributions systems is crucial to ensuring high quality drinking water. Distribution systems-consisting of pipes, pumps, valves, storage tanks, reservoirs, meters, fittings, and other hydraulic appurtenances-carry drinking water from a centralized treatment plant or well supplies to consumers' taps. Spanning almost 1 million miles in the United States, distribution systems represent the vast majority of physical infrastructure for water supplies, and thus constitute the primary management challenge from both an operational and public health standpoint. Recent data on waterborne disease outbreaks suggest that distribution systems remain a source of contamination that has yet to be fully addressed. This report evaluates approaches for risk characterization and recent data, and it identifies a variety of strategies that could be considered to reduce the risks posed by water-quality deteriorating events in distribution systems. Particular attention is given to backflow events via cross connections, the potential for contamination of the distribution system during construction and repair activities, maintenance of storage facilities, and the role of premise plumbing in public health risk. The report also identifies advances in detection, monitoring and modeling, analytical methods, and research and development opportunities that will enable the water supply industry to further reduce risks associated with drinking water distribution systems.

Management of Legionella in Water Systems

Management of Legionella in Water Systems
Author: National Academies of Sciences, Engineering, and Medicine
Publisher: National Academies Press
Total Pages: 291
Release: 2020-02-20
Genre: Medical
ISBN: 030949382X

Legionnaires' disease, a pneumonia caused by the Legionella bacterium, is the leading cause of reported waterborne disease outbreaks in the United States. Legionella occur naturally in water from many different environmental sources, but grow rapidly in the warm, stagnant conditions that can be found in engineered water systems such as cooling towers, building plumbing, and hot tubs. Humans are primarily exposed to Legionella through inhalation of contaminated aerosols into the respiratory system. Legionnaires' disease can be fatal, with between 3 and 33 percent of Legionella infections leading to death, and studies show the incidence of Legionnaires' disease in the United States increased five-fold from 2000 to 2017. Management of Legionella in Water Systems reviews the state of science on Legionella contamination of water systems, specifically the ecology and diagnosis. This report explores the process of transmission via water systems, quantification, prevention and control, and policy and training issues that affect the incidence of Legionnaires' disease. It also analyzes existing knowledge gaps and recommends research priorities moving forward.

Construction Inspection Manual, 5th Ed.

Construction Inspection Manual, 5th Ed.
Author: APWA Engineering and Technology Committee
Publisher: APWA Press
Total Pages: 411
Release: 2021-03-03
Genre: Technology & Engineering
ISBN: 1606751549

The Construction Inspection Manual includes all facets of public infrastructure inspection including the roles and responsibilities of an inspector, pre-construction planning, documentation, communication risk management and legal issues, scheduling and project close-out. Technical areas covered include Earthwork, Excavation and Trench Safety, Confined Space Safety, Underground Piping Installation, General Concrete, Street and Surface Improvements, Roadway Lighting, Traffic Signals, and Landscape and Irrigation. Information on Trenchless Utility Installation Rehabilitation and Introduction to Structures were expanded in this updated manual. Two new modules were added to the manual Construction Inspection of Stormwater Control Measures and Pumping and Treatment Facilities for Water and Wastewater.

Corrosion Atlas Case Studies

Corrosion Atlas Case Studies
Author: Fuad Khoshnaw
Publisher: Elsevier
Total Pages: 212
Release: 2021-11-28
Genre: Technology & Engineering
ISBN: 0323858503

Corrosion engineers today spend enormous amounts of time and money searching multiple detailed sources and variable industry-specific standards to locate known remedies to corrosion equipment problems. Corrosion Atlas Series is the first centralized collection of case studies containing challenges paired directly with solutions together in one location. The second release of content in the series, Corrosion Atlas Case Studies: 2021 Edition, gives engineers expedient daily corrosion solutions for common industrial equipment, no matter the industry. Providing a purely operational level view, this reference is designed as concise case studies categorized by material and includes content surrounding the phenomenon, equipment appearance supported by a color image, time of service, conditions where the corrosion occurred, cause, and suggested remedies within each case study. Additional reference listings for deeper understanding beyond the practical elements are also included. Rounding out with an introductory foundational layer of corrosion principles critical to all engineers, Corrosion Atlas Case Studies: 2021 Edition delivers the daily tool required for engineers today to solve their equipment's corrosion problems. - Solves equipment failure with easy-to-find remedies organized by essential elements such as materials, system, part, cause, environmental, and phenomenon - Grasps fundamental corrosion elements on all major industrial pieces of equipment, no matter the industry - Identify failures by appearance with color figures within each case study