摘要:

From the AWWA annual conference of 1921, held in Cleveland, Ohio, comes this sagacious viewpoint of the scientific role of the water utility operator. These 65‐year‐old words take on renewed vigor now that drinking water regulations require increased surveillance at the treatment plant.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1986.tb05805.x

出版商:Wiley    

年代:1986

数据来源: WILEY

摘要:

In a case of interest to private utilities in general, the Supreme Court of the United States had to decide whether the California Public Utility Commission could require a privately owned utility company to include in its billing envelopes the opinions of a third party with which the utility disagreed. The court ruled that such an order was impermissible under the First Amendment.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1986.tb05807.x

出版商:Wiley    

年代:1986

数据来源: WILEY

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1986.tb05810.x

出版商:Wiley    

年代:1986

数据来源: WILEY

摘要:

Protection of a sole source aquifer in Spokane County, Wash., instigated a series of institutional and technical reforms. Among the most important measures implemented was the creation of local utility districts in outlying areas of the county for the collection and treatment of wastewater in cooperation with the city of Spokane to mitigate the detrimental effects of septic tanks placed above the aquifer. Other protective measures necessitated reforms in land use regulations and adoption of growth policies. Once the importance of preventing further degradation of the aquifer was understood by the public, support was obtained for the relatively modest assessments necessary to implement the protection plan.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1986.tb05811.x

出版商:Wiley    

年代:1986

数据来源: WILEY

摘要:

In the early 1980s, a series of limited special purpose investigations was initiated to determine whether certain chemicals were entering Wisconsin's groundwater and, if so, to determine their concentrations. Screening of 1174 community wells and 617 private wells showed that 65 community wells had detectable levels of volatile organic chemicals (VOCs) and that 5 community wells had concentrations above the recommended health advisory levels. Also 82 private wells had detectable levels of VOCs, 14 of which had concentrations above the health advisory. On the basis of these initial results, sampling near probable sources of contamination will be given more attention as contamination appears more site‐specific than widespread.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1986.tb05812.x

出版商:Wiley    

年代:1986

数据来源: WILEY

摘要:

The effects of urban runoff used to recharge groundwater basins in the Fresno, Calif., area are discussed. The study, which was part of the US Environmental Protection Agency's nationwide urban runoff program, was undertaken to determine the environmental effectson groundwater quality and to identify management practices that would mitigate adverse effects. No deterioration of groundwater quality because of recharge with runoff was found, although the authors recommend a more thorough investigation of the effects of recharge with runoff from industrial sites.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1986.tb05813.x

出版商:Wiley    

年代:1986

数据来源: WILEY

摘要:

The case study presented describes the discovery and the investigation of the trichloroethylene and related contamination of a public noncommunity well water supply in Montgomery County, Md. Although the local government's response to this potential public health threat was eventually successful, the government encountered several serious technical, legal, and institutional obstacles. Conclusions are drawn from this experience and recommendations are given to provide guidance to other utilities and public health agencies that may be faced with similar problems in the future.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1986.tb05814.x

出版商:Wiley    

年代:1986

数据来源: WILEY

摘要:

An air‐stripping tower was designed to treat 1500 gpm (0.09464 m3/s) of groundwater contaminated with trichloroethene, tetrachloroethene,cis‐1, 2‐dichloroethene, toluene, ethyl benzene, and isomers of xylene. A simplified procedure for designing a tower with the smallest volume and energy requirements was used. Data for the first four months of operation demonstrated excellent removals for the six volatile organic compounds. The cost of treatment was about $0.0586/1000 gal (3.785 m3) of water treated. Operating problems, microbiological analyses, and data regarding total organic halogen (TOX) and TOX formation potential are summarized.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1986.tb05815.x

出版商:Wiley    

年代:1986

数据来源: WILEY

摘要:

Weak‐acid resin in the hydrogen form was found to effectively remove barium, radium, and hardness, without increasing the sodium content of the product water. The maximum capacity of the weak‐acid resin was about 2.3 times that of strong‐acid resin, and much less spent regenerant per unit volume of water treated was produced from a weak‐acid column than from a strong‐acid column. There are, however, some disadvantages to weak‐acid ion exchange swelling of the resin during exhaustion, the need to use acid‐resistant materials, the inability to remove noncarbonate hardness, the necessity of stripping carbon dioxide from the product water and adjusting the pH, and the probable higher cost.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1986.tb05816.x

出版商:Wiley    

年代:1986

数据来源: WILEY

摘要:

Invertebrates collected from the water distribution system of Worcester, Mass., were found to harbor a variety of bacteria—some of which may be pathogenic to humans—and to protect them from inactivation by chlorine and monochloramine. Currently, the best approach to invertebrate control is elimination of these organisms before they enter the distribution system or physical or chemical modification of their potential habitats within the system.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1986.tb05817.x

出版商:Wiley    

年代:1986

数据来源: WILEY