Testing

Article May 14, 2008
A potential bridge-collapse calamity was averted in Arizona through the use of advanced construction-integrity-testing techniques. Major defects that were invisible to the naked eye were discovered in a bridge under construction over the Salt River bed in Phoenix. The defects were large subsurface...
Article November 16, 2007
On Aug. 2, just one day after the I-35W Bridge collapse in Minneapolis, the Federal Highway Administration issued a technical advisory urging departments of transportation and other bridge owners to conduct immediate inspections of all steel-deck truss bridges with fracture-critical members, even...
Article September 14, 2005
It seems like you hear about it everywhere. People are talking about noise. People living near heavily traveled roadways are becoming more vocal in their complaints about traffic noise, and they are demanding reductions. Average citizens are starting to notice that some pavements are quieter than...
Article September 08, 2005
One of the many responsibilities of operators is specifying equipment for their applications. More manufacturers entering the market can make this a complicated task with extensive amounts of information to sort through. This article examines some of the important factors to consider when choosing...
Article August 02, 2005
As concerns over the health effects of arsenic increase, so do the regulations to minimize the levels of arsenic in drinking water. To help communities accommodate new regulations—especially the U.S. EPA’s new arsenic rule effective in January 2006—U.S. water treatment companies are finding and...
Article August 02, 2005
The Federal Highway Administration (FHWA), the National Asphalt Pavement Association (NAPA) and the National Center for Asphalt Technology (NCAT) are working with material suppliers to evaluate a group of technologies commonly called warm-mix asphalt. The processes are designed to facilitate...
Article May 11, 2005
The Sausalito-Marin City Sanitary District (SMCSD) is a publicly owned treatment works in California, responsible for collecting, treating and discharging domestic wastewater into San Francisco Bay. The SMCSD, like most wastewater treatment facilities in the U.S., is regulated at the state level...
Article May 11, 2005
Throughout the last century, many North American municipalities implemented water disinfection and filtration systems to protect residents from illnesses caused by microbial contamination. But in recent years, as populations grew, pollution increased and treatment plants aged, some municipalities...
Article May 10, 2005
The full cost of ownership consists of the initial capital, commissioning, training, spare parts, maintenance and calibration costs for the lifetime of the meter-related equipment. The full cost is several times the initial capital investment and should be the deciding factor in equipment selection...
Article January 01, 2005
Water is probably the most important natural resource in our environment. We drink it, we wash with it, cool with it, transfer energy with it, and we even use it to move things around. If water was a pure substance it could be used without concern, but water is far from pure. It contains...
Article January 21, 2003
The first two-year cycle of tests at the National Center for Asphalt Technology (NCAT) Test Track, Auburn, Ala., was completed recently. The testing of 46 different sections was conducted by subjecting the pavements to the equivalent of 10 to 12 years of traffic loading in two years. Heavier-than-...
Article October 08, 2002
As part of its Safe Drinking Water Program, the State of Louisiana recently implemented 12 units of the Severn Trent Services Eclox(TM) Rapid Response Water Testing System. Eclox offers municipalities a low cost option for monitoring water quality and meeting new security requirements. Designed for...
Article September 26, 2002
Consumers want to know if the bottled water they buy is safe. How and why bottled water is regulated is not common knowledge and can be confusing to customers. Bottlers who understand and can explain aspects of water quality, regulations and test results to their customers have a useful sales tool...
Article August 27, 2002
Chemical analyses have been an integral part of the water treatment industry since its inception. However, as technology and consumer awareness have changed, so to have the analytical requirements of the industry. To remain successful, the water treatment professional should take advantage of...
Article May 28, 2002
The American Society for Testing Methods (ASTM) and American Water Works Association (AWWA) have standard test methods for commerce between buyers and sellers of activated carbons (AC). These methods have been discussed in other articles 1,2 and are listed in Table 1 by title and method number. The...
Article February 26, 2002
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Article February 26, 2002
xmlns:w="urn:schemas-microsoft-com:office:word" xmlns="http://www.w3.org/TR/REC-html40"> Chlorine Taste in the Customer’s Drinking Water /*-->*/   Chlorine produces bacteria-free water and eliminates algae and slime. It also removes hydrogen sulfide from ground water (wells and springs)...
Article January 30, 2002
Part 1 of this article (January 2002) reviewed legionellosis (the diseases caused by Legionella infection), the sources and transmission of Legionella bacteria and conditions that tend to promote colonization. A discussion of the pros and cons of routine monitoring, as well as various recommended...
Article November 28, 2001
To save or not to save is often the question facing owners of historic reinforced concrete bridges built in the first half of the 20th century. For decades, most have been subjected to much heavier traffic than their original designers ever imagined, not to mention the wear and tear of weather and...
Article September 11, 2001
The bottled water industry continues to strive to produce a quality product that inspires consumer confidence. One of the most important (and sometimes the most complex) area of the bottled water business is compliance with federal, state and industry regulations. As the EPA continues to evaluate...
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