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Epa Orders Orica To Clean Up Arsenic In Groundwater At Kooragang

THE Environmental Protection Authority (EPA) has instructed chemical giant Orica to clean-up and remediate the groundwater that is contaminated with arsenic at its Kooragang Island site.

The company tackled the problem by addressing the primary source of the arsenic contamination not long after it took control of the Kooragang Island site in 2005. However, the EPA has directed it to start the clean-up phase of the remediation.

Contaminated groundwater sources may in fact be treated by a process that removes pollutants or restrain the water so more re-contamination does not occur. Basically, groundwater remediation is what we call the undertaking of treating contaminated water, whatever the method used. Since groundwater happens naturally in various locations, sometimes it can be quite difficult to find the actual source of the contamination before dealing with the water. This process usually falls into any of the two major categories which include chemical and biological process.

The chemical process involved in this category of groundwater remediation uses specific compounds or agents that either soak up or convert pollutants in a form that decompose naturally in water. The pumps and filters are used in this method of remediation in order to eliminate any residual absorbing compounds. Two other methods called phases of air injection and extraction use some of the mechanical compounds of biological and chemical treatment, but in theory, it cannot be classified as both.

In the biological type of groundwater remediation, there are at least five fundamental processes of cleaning that include bio-augmentation, bio-venting, bio-slurping, bio-sparging, and phytoremediation. When using phytoremediation, the process usually include the use of certain plant or trees as natural filters since this will not be harmed by the pollutants found in the water.

The remaining four types of processes entail the presentation of microorganisms in the polluted water wherein they will start breaking down the contaminants and totally disintegrating them in the process. And because soil and water are so closely related, it is not uncommon to hit upon polluted soil in the process of groundwater remediation. Whether or not contaminants already leaked out on the water table by emptying it out through the soil, or the soil itself has been polluted because of the water seepage, still it must be decontaminated using the process known as soil remediation. This usually happens along with water remediation to fully remove all contaminants present in the surroundings.

According to statistics, majority of the country’s residents are getting their tap water from a groundwater supply. The truth remains that groundwater is widely used not only for drinking and cooking but for other household purposes as well including laundry, crops irrigation, livestock maintenance, and in industrial purposes as well such as manufacturing, and many more things too many to mention.

If you believe your groundwater source has been contaminated with unknown pollutants, it is best to allow experts perform extensive groundwater remediation to make sure the water you use is free from any harmful and toxic contaminants that may prove to be a major health risk.

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