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Accession Number
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ADA564253
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Title
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Maintaining Water Supplies to a Remote Island Population When Source Water Becomes Contaminated.
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Publication Date
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May 2011
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Media Count
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23p
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Personal Author
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J. Manint
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Abstract
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On December 8, 2008, the island of Roi-Namur had high wave activity (onset of dry season). Nearly all of its lenswells were contaminated with salt water. A drinkable chloride concentration is 250 mg/L; ocean water chloride concentration is 35,000 mg/L. The only well not contaminated had a history of Volatile Organic Compound (VOC) contamination. There are roughly 12 days of raw water in storage under normal operation, and roughly 30 days of treated water in storage under normal operation. The Army's goal was to utilize the contaminated lenswell to supplement the island's drinking water. Water treatment consisting of Granular Activated Carbon (GAC) filters was initiated to extend the water supply. Other water options: barge water from Kwajalein Island, dig new wells, or install new treatment for brackish water (reverse osmosis purification units, or ROWPUs). Temporary ROWPUs were installed on Roi- Namur on February 6, 2009. ROWPU is costly. Rainfall is needed and the estimated recovery time is 2 years (2011). A permanent reverse osmosis system was installed in January 2010. There was very good lenswell water quality this year.
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Keywords
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Activated carbon
Army
Brackish water
Briefing charts
Chemical contamination
Chlorides
Drinking water
Granular activated carbon filters
Lenswell water
Pacific ocean islands
Public health
Purification
Rain water collection
Rainfall
Remote areas
Reverse osmosis
Reverse osmosis purification units
Roi-namur
Seawater contamination
Volatile organic chemical contamination
Water demand
Water filters
Water pollution
Water quality
Water supplies
Water treatment
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Source Agency
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Non Paid ADAS
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NTIS Subject Category
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99B - Industrial Chemistry & Chemical Process Engineering
48G - Hydrology & Limnology
46B - Fluid Mechanics
68D - Water Pollution & Control
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Corporate Author
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Army Public Health Command, Aberdeen Proving Ground, MD.
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Document Type
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Technical report
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Title Note
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Briefing charts.
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NTIS Issue Number
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1302
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Contract Number
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N/A
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