Perfluorinated Chemical Contamination in Drinking Water Raises Concerns in Congress
Shortly after a House subcommittee examined the issue of perfluorinated chemicals in drinking water, a group of Michigan representatives introduced legislation intended to encourage federal agencies to...
Water Chemistry of Lead Corrosion Control
Requirements of the Lead and Copper Rule (U.S. EPA) makes it necessary for regulators, consultants, and water purveyors to understand the fundamental relationships between water quality...
Acidity and Chemistry of Arizona's Snowpacks
Acid snow, the frozen version of the acid rain phenomena, has been sampled in several western states, e.g., California, Nevada, Montana, and Oregon. Measurements of snowpack acidity in...
Primary Metals and Criteria for Water use in the Columbia River, British Columbia
We assessed primarily concentrations of lead, cadmium, copper, zinc and water hardness in the Columbia River between Birchbank and Waneta. Water quality in this reach of the river is affected...
Relationships Between Flow and Benthic Communities
Current flows can affect directly factors critical to the survival of benthic communities, including the availability of food and nutrients, the chemical quality of water surrounding benthic...
Projections for Reduction in Lake Acidification From SO2 Emission Reductions
The Acid Deposition Assessment Model (ADAM) is used to assess the possible range of effects of a national acid rain emission reduction plan on lake chemistry and fish populations in the...
Air-Water Transfer: The Role of Partitioning
A review is presented of the role of air-water equilibrium in determining the direction and rate of transfer of chemicals between water bodies and the atmosphere. Because this diffusive...
Removal of Scale from Potable Hot Water Systems by Carbon Dioxide Injections
An innovative method for inplace scale removal has been developed and demonstrated. Injection of carbon dioxide gas into a piping system can lower the pH of the hot water and remove or...
Effects of Mining, Grazing, and Roads on Sediment and Water Chemistry in Birch Creek, Nevada
Assessment of the cumulative effects of mining and other land uses on water quality of Birch Creek showed that mine dumps and roads increased fine sediment deposits in some reaches. Fines...
Factors Affecting Neutron Gauge Calibration
Neutron gauge characteristics and soil chemistry affect gauge calibration. External factors also influence gauge calibration and should be considered in the calibration procedure. Gauge...
Hydrogen Generation from Sea Water by Means of a Metal Hydrolysis Process
Active metals such as magnesium reacted with steam can produce hydrogen. This reduction of water by magnesium or aluminum is a thermodynamically favorable process, however, formation of...
Use of Sediment Bulk Chemistry Data for Dredged Disposal Management in Puget Sound
Although no fully scientific approach for setting and interpreting sediment chemical levels is currently available, an effects-based approach for using bulk chemistry data was evaluated...
Mixed Solute Interactions in Groundwater Systems
Research results are presented from a study examining the competitive sorption effects of two organic chemicals, para-dichlorobenzene and 2,4-dichlorophenol, to solids from the Cohansey...
Coping with Litigation
Engineers should learn legal philosophy, even though it seems unrelated to traditional technical practice. Monitoring changes in legal theory that may increase engineers'...
Physical and Chemical Behavior of Chrysotile Asbestos Particles in Natural Waters
The paper reports on research to develop a better understanding of the chemical behavior and the influence of surface chemistry on the physical behavior of chrysotile asbestos and other...
Are Engineers Happy People?
Job satisfaction for the professional engineer is discussed in relation to society's image of the engineer and the engineering profession. It is argued that society has a...
Stopping Water with Chemical Grout
New chemical grouts are now available to repair sewer leaks, control groundwater movement, and stabilize incompetent soils. Some of these grouts came into being only after the American...
Water Industry Fighting EPA's Drinking Water Regulations
With few exceptions, most of the nation's drinking-water utilities are strongly opposed to many provisions of EPA's proposed regulations for reducing the levels...
Flow Equalization�Plus for Wastewater Treatment Plants
Flow equalization is important in maintaining optimum level performance in chemical water treatment plants. One way to do this is to build storage tanks upstream to regulate flow instead...
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