摘要:

Few people know that most of the damage from the great San Francisco Earthquake of April 18, 1906, resulted from the ensuing fires—the worst in US history. In 1908, the city's chief engineer conducted a study of 250 cities worldwide to develop plans for a guaranteed water supply. This paper describes the Auxiliary Water Supply System for fire protection, beginning with the original system which was approved by voters in 1908 Also included are an update of the current status of the system and details of the new SCADA system.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1996.tb01282.x

出版商:Wiley    

年代:1996

数据来源: WILEY

摘要:

This month's question asks why the water looks milky during the cold winter months. The article discusses several reasons for this condition: water density is greater in cold weather, causing slower chemical reactions which make it difficult to get floc to settle; or, floc carrying through the filter as particulate floc. Adjusting pH in response to seasonal temperature variations, using ferric salts for coagulation during the winter months, jar testing, and temperature changes in cold water causing air binding in the filter are all discussed.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1996.tb01283.x

出版商:Wiley    

年代:1996

数据来源: WILEY

摘要:

When the City of Calgary (Alberta) Waterworks Division decided to replace the turbidimeters on the effluents of its 48 rapid‐rate dual‐media filters, it was decided to involve all stakeholders in the evaluation and decision making process. Plant operators, lab staff, and equipment maintenance staff met and set up a testing protocol to evaluate meters from the viewpoint of each group.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1996.tb01284.x

出版商:Wiley    

年代:1996

数据来源: WILEY

摘要:

Do you ever think about what you would miss if you lost your eyesight in a job‐related accident? Night skies full of stars, burning red sunsets, and your child's first steps‐‐these, and many other images, would be missing from your life experience. The good news is eye specialists report that most, if not all, eye injuries can be prevented with proper protection. The author discusses prevention and protective equipment and cites examples of accidents involving sulfuric acid, electricity and lime.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1996.tb01285.x

出版商:Wiley    

年代:1996

数据来源: WILEY

摘要:

Reauthorization of the Safe Drinking Water Act is long overdue. A victim of politics, reauthorization died in the closing hours of the 103rd Congress. In January 1995, the beginning of the 104th Congress, expectations were high that reauthorization would be completed early. Political reality has set in and other priorities have held Congress' attention. SDWA reauthorization now is not expected until spring 1996 or later.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1996.tb01286.x

出版商:Wiley    

年代:1996

数据来源: WILEY

摘要:

Currently, in the field of chlorination, there appears to be a spreading misuse in the terminology of chlorine and chlorination compounds. The authors define gaseous chlorine, liquid chlorine, solid chlorine, aqueous chlorine and chlorine tablets, granules or powder.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1996.tb01287.x

出版商:Wiley    

年代:1996

数据来源: WILEY