Effects of Recharge of Chlorinated State Water Project Waters to Groundwaters in Lancaster Area of California

As the population in Southern California increases, more and more demands are being put on the state’s groundwater resources, further exacerbating the overdraft problem. Many communities in Southern California are recharging their aquifers with imported surface waters to combat this problem. The major recharge normally is carried out during wet weather periods when surface water is plentiful. However, recharging these groundwater aquifers with imported surface water can create the potential for water quality degradation. The problem can start when surface water is disinfected with chlorine to prevent biofouling and remove pathogens.

Deck: 

Groundwaters in many parts of California are an important sole source of water supply. However, in some areas indiscriminate pumping has lowered aquifer levels by hundreds of feet. This has caused sediment compaction and ground subsidence.

About The Author: 

Hisam A. Baqai, P.E., G.E., is the division manager of the Lahontan Regional Water Quality Control Board in Victorville, Calif.

Activation Date: 
April 2, 2002
Legacy
Legacy ID: 
13036

Advanced Treatment for Groundwater: Treating Low-Quality Groundwater for Municipal Use

Groundwater sources that can be used for drinking water purposes are requiring increasing degrees of treatment to meet the requirements of both the regulating agencies and the consumer.

Deck: 

Disinfection

About The Author: 

Ralph Gelvin, P.E., is a senior engineer with Burns & McDonnell.
Don Novak, P.E., is a project manager with Burns & McDonnell.

Activation Date: 
November 13, 2001
Legacy
Legacy ID: 
12769

Meeting the Challenge: Revitalizing the Las Vegas Wash

In response to growing concerns over water quality issues in the Wash, a committee has developed a comprehensive adaptive management plan to save this primary outlet for water flows.

Deck: 

Ecosystem Management

Activation Date: 
October 19, 2001
Legacy
Legacy ID: 
12707

Long-Term Settlement of a Large Water Standpipe

When tank settlement is anticipated, certain precautions must be taken to assure that the tank settles properly.

Deck: 

Water Tanks

About The Author: 

Steven Law, Ph.D., P.E., is a principal engineer and John Kasprzak is a design technician of the Infrastructure Systems Group of the Washington Suburban Sanitary Commission, Laurel, Md.

Activation Date: 
May 21, 2001
Legacy
Legacy ID: 
12392

Using Horizontal Wells for Groundwater Remediation

 

Deck: 

At Work on Groundwater Treatment

Activation Date: 
April 23, 2001
Files: 
Legacy
Legacy ID: 
12338

Oxidizing Arsenic III to Arsenic V for Better Removal

On June 22, 2000, the U.S. Environmental Protection Agency (EPA) proposed lowering the maximum contaminant level (MCL) for arsenic from 50 down to 5 micrograms/L (Federal Register, 2000).

About The Author: 

Dr. Dennis Clifford, P.E., is a professor of environmental engineering and chair of the Department of Civil and Environmental Engineering at the University of Houston. He has more than 30 years experience in teaching, research and consulting related to water and soil treatment. During the last 20 years, he and his students have extensively researched the subject of arsenic speciation, oxidation and treatment.

Ganesh Ghurye received his master’s degree in environmental engineering from the University of Houston, where he currently is a researcher in the area of water treatment. He has five years experience in developing arsenic treatment methods.

Activation Date: 
March 14, 2001
Files: 
Issue Reference: 
Legacy
Legacy ID: 
12210

Making Yankee Doodle Dandy: Ground Storage Reservoir Restoration

Fourteen entities came together to repair and restore a storage reservoir tank that was showing signs of advanced deterioration both inside and out.

Deck: 

Tank Coatings

About The Author: 

Dan Zienty is a project design leader for Short Elliott Hendrickson Inc., St. Paul, Minn.

Activation Date: 
December 28, 2000
Legacy
Legacy ID: 
11886

Natural Attenuation: Using Statistics to Understand Ground Water Contamination

When ground water contamination is discovered at a site, a host of questions must be answered before it can be effectively removed or minimized. Battelle Memorial Institute, an international research organization headquartered in Columbus, Ohio, has recently developed a statistical approach for assessing natural attenuation of contaminants. This approach can be used to estimate how quickly contaminants can be remediated using biological methods.

Deck: 

At Work on Groundwater Treatment Processes

Activation Date: 
December 28, 2000
Legacy
Legacy ID: 
11243

Filter Media Rids Iron from Groundwater

The most common process for iron removal from water is to allow water-soluble ferrous iron (FE2+) in water to turn into water-insoluble ferric iron (Fe3+), and then capture FeIII (iron oxide) particles by filtration.

About The Author: 

Yun H. Zhang is an engineer for World Construction Co., San Francisco, CA. He holds patents in the U.S., UK and Japan for this media system under the title "Ground Water Filter for Obtaining Drinking Water."

Activation Date: 
December 28, 2000
Legacy
Legacy ID: 
10950

Drink the Water: Proven Methods, New Advances in Ground Water Treatment

Ground water is the most popular source for water in the United States. Now with growth of proven treatment methods and advances in treatment technologies for contaminated ground water, the future is bright for the ground water industry.

About The Author: 

Bob Masters is the director of marketing for the National Ground Water Association. For further information call 800-551-7379.

About the National Ground Water Association: Water well drillers, hydrogeologists, engineers, manufacturers and suppliers make up the world's largest ground water association with over 18,000 members.

Association president Bill Stoner from Corsicana, Texas has many years of experience in the ground water and well drilling business.

Executive director Kevin McCray, a 13-year veteran of the association, has given testimony before both the Ohio House of Representatives and the U.S. Senate on the ground water industry, compiled or authored a number of books on ground water, and written numerous articles on ground water.

Activation Date: 
December 28, 2000
Legacy
Legacy ID: 
10621