Mixing it Up
Water & Wastes Digest
May 2009
By Peter S. Fiske
A water district uses submersible mixers to prevent a deep freeze in its storage tanks
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Beyond Storage
Water & Wastes Digest
May 2008
By Mark Eklund
When incorporating a tank in a plant, consider coatings, future expansion and the facility’s individual needs to maximize performance
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Built from the Top Down
Water & Wastes Digest
May 2007
By Chuck Sack
Assembling a new generation of water tank standpipes
The Deep Impact of Tanks
Water & Wastes Digest
January 2007
By Cliff Rothenstein
Protecting the nation’s source waters and revitalizing communities for the 21st century
Extreme makeover
Water & Wastes Digest
July 2006
By Mark D. Thomas
Woodfield Mall water tank coating ensures long-term gloss & color retention, and 15-plus year life expectancy
Just Another Day at the Beach
Water & Wastes Digest
May 2005
By Don Richard
Together, these systems were insufficient for near-term demand and they fell far short of the projected future needs for this fast-growing community.
Reservoir Tank Is One of A Kind
Water & Wastes Digest
May 2005
By Judy Horning
This expansion project is part of a long-term citywide capital improvement program to improve the infrastructure and services that provide San Diegans with safe drinking water.
Caldwell Tanks Goes the Extra Mile for Kids
Water & Wastes Digest
May 2005
By Denise Covelli
Caldwell Tanks of Louisville, Ky., helped create this unique tank design for Kyle and Pattie Petty’s Victory Junction Gang Camp, which opened last summer to provide a haven for chronically ill children.
Time Saved Testing Pays Off
Water & Wastes Digest
May 2005
By Adam Potter
Many wastewater plants are switching from fecal coliforms to monitoring for E. coli and Enterococcus, because the EPA has identified these bacteria as the best indicators of fecal contamination in water.
Building a Tank Within a Tank
Water & Wastes Digest
January 2005
By Maureen LeCocq
The solution was to build a 2.8 million-gallon water storage tank-within-a-tank.
Muddy Waters No More
Water & Wastes Digest
May 2004
By Paul Cummins
In April 2003 when work began on the $31.5 million Maxwell Bridge replacement project over the Napa River, maintaining the river water quality was key. The California Regional Water Quality Control Board required water discharge not exceed 10% in areas where natural turbidity is greater than 50 NTU.
Walls of Steel
Water & Wastes Digest
December 2003
Replacing the lining on a deteriorated lagoon saved one company $1 million over constructing a new wastewater holding tank.
Chemical Tank Cleaning Eliminates Town's Chlorine Demand
Water & Wastes Digest
May 2003
Ulrich Reimann-Philipp, Ph.D.
Finished water quality often declines in storage facilities. Traditional tank cleaning methods have some effect in removing loose debris and sediment, but leave most of the scale, metal oxide deposits and biological growth in place. Chemical cleaning methods have been widely applied in Europe for years and have become an essential part of preserving water quality in systems which operate with minimal or no chlorine.
Aeration for Ponds and Cisterns
Water Quality Products
January 2003
Jeff Roseman, Aqua Ion Plus+ Technologies
Using oxygen for the natural cleansing of water is becoming a viable alternative for pond and cistern owners in reducing the use of chemicals to fight the bacteria and algae that can become a nuisance. An aerobic bacterium needs oxygen in order to maintain the balance of nature. This article will take a look at some methods for increasing oxygen content, Henry's Law and applications that benefit from increased levels of O2.
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Portable Tanks Help In Gas Pipeline Expansion Project
Water & Wastes Digest
May 2002
By reclassifying the existing pipeline, PG&E avoided the enormous expense of laying 38 miles of new pipe. The primary objectives of the project were to safely raise natural gas pipeline pressure without increasing the release of nitrogen oxide (NOx) into the atmosphere. These objectives were achieved by relocating two pressure limiting stations, retrofitting two internal combustion compressors, and performing pipeline hydrotesting operations.
Tanks Pull Double Duty
Water Engineering & Management
February 2002
Dan Zienty
Following the adoption of the Telecommunications Act of 1996, water storage facilities have become fair game for the installation of antennas and associated ground equipment. A storage tank pulling double duty raises maintenance and safety issues for consideration by municipalities and their system operators.
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Minimizing Out-of-Service Time During Tank Painting
Water Engineering & Management
February 2002
Tank painting projects can cost many thousands of dollars, but often the most costly aspect of tank rehabilitation is having your tank out of service. What can be done to get your tank back in service sooner? One approach is to control the environment and minimize delays due to poor weather. Another is to use coatings that tolerate a wide range of climatic conditions and cure quickly at ambient temperature. By combining these methods, down-time can be greatly reduced.
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Environmental Control Speeds Water Tank Project
Water Engineering & Management
April 2001
Concerns about expenses, deadlines and the environment all came into play when the Helix Water District near San Diego, Calif., had to recoat a four-million-gallon water storage tank.
Water Storage Tank Fulfills Water Needs
Water Engineering & Management
August 2000
A conspicuous structure with alternating red and white stripes stands in the City of Sylacauga, 45 miles southeast of Birmingham, Ala. The brightly colored, towering object is a new water storage tank, the largest to be built in the city and a crucial contribution to the city’s present water needs and future growth.
San Diego Tank Structure Wins Award
Water & Wastes Digest
May 2000
Demand for additional sewerage system capacity and the need to reclaim wastewater in San Diego’s arid region led the City of San Diego Metropolitan Wastewater Department, San Diego, California, to construct two 3.5 MG flow equalization basins at the North City Water Reclamation Plant (NCWRP).
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