The Boomsnub site in the state of Washington was listed as a Superfund site in 1995. The site consists of two parcels of land, which previously contained two unrelated businesses that contributed separately to contamination of soil and groundwater.
Superfund site cleanup of chromate-contaminated groundwater
WQP: What is the NGWA? Give us a brief overview of the association and its function
Kevin McCray: The NGWA, founded in 1948, is the third largest water-related membership organization in the world. Nearly 15,000 international members are committed to the association’s mission of advancing the expertise of all groundwater professionals and to furthering groundwater awareness and protection through education and outreach. These professionals come from contracting, manufacturing, science, supply, engineering and government sectors.
Overview of regulations and contamination factors
Stormwater management and its role in the larger challenge of preservation of water quality around the world is an evolving issue. As commercial development continues at record levels, both the quantity of runoff and water quality are issues that need to be looked at carefully. The engineering community is being pushed to design new solutions that keep groundwater and surface water ecology safe and that also protect development economics.
Although China ranks sixth in the world in total water resources, there is a shortage. The average water resources per capita is 2,300 m3, making it only one fourth of the world average per capita, while the unit plantation area of water resources is only one half the world’s average value.
Groundwater resources throughout northern China are drying up at an astonishing rate.
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.
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.
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.
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.
When tank settlement is anticipated, certain precautions must be taken to assure that the tank settles properly.
At Work on Groundwater Treatment