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Item Description Lau, L. Stephen en_US 2008-07-17T22:40:04Z 2008-07-17T22:40:04Z 1987-07 en_US
dc.identifier.citation Lau LS. 1987. Organic chemical contamination of Oahu groundwater. Honolulu (HI): Water Resources Research Center, University of Hawaii at Manoa. WRRC technical report, 181. en_US
dc.description.abstract An investigative project developed the scientific knowledge needed to respond to the discovery of organic chemical contamination of groundwater in Hawaii. Ethylene dibromide (EDB) and dibromochloropropane (DBCP), both suspected carcinogens to humans and banned shortly after the discovery of contamination, were discovered in the tens of nanograms per liter (ng/l or parts per trillion) in central, southern, and northern Oahu. As a result, eight potable water wells were closed, thereby removing 13 mgd from the drinking water supply during 1982 to 1983. The 3-yr project involved deep boring, laboratory testing, and predictive transport modeling conducted by a University of Hawaii multidisciplinary research team, and was funded by special appropriations from the Hawaii State legislature with supplemental funds from the Office of Environmental Quality Control and the Department of Health. Project results indicate, first, that EDB-contaminated groundwater was of limited extent and mainly located hydraulically downgradient from reported leaks of aviation fuels containing EDB; that DBCP contaminated groundwater was relatively widespread and located beneath and downgradient from pineapple fields on which DBCP had been applied as fumigants for many (17-25 or more) years; and that trichloropropane (TCP), an impurity of the previously used fumigant Shell DD, was found to be the most widespread. Second, the residues of DBCP and EDB which remain in the surface soils do not constitute a significant source of future contamination of the underlying deep groundwater. Third, DBCP in the contaminated groundwater in Mililani is predicted to experience limited migration in the basal groundwater and to drop to below the regulated level by the year 2000 under the present scenario of groundwater management. The project also developed guidelines for the timing of fumigant application to minimize the transport of pesticides below surface soils and for alternative treatment methods of contaminated groundwater for potable use, and addressed water well technology for contaminated aquifers. en_US
dc.description.sponsorship State of Hawaii: Legislature, Office of Environmental Quality Control, and Department of Health Grant/Contract No. T-377 en_US
dc.format.extent xviii + 153 pages en_US
dc.language.iso en-US en_US
dc.publisher Water Resources Research Center, University of Hawaii at Manoa en_US
dc.relation.ispartofseries WRRC Technical Report en_US
dc.relation.ispartofseries 181 en_US
dc.subject groundwater en_US
dc.subject potable water en_US
dc.subject water wells en_US
dc.subject pesticides en_US
dc.subject nematicides en_US
dc.subject potable-water wells en_US
dc.subject DBCP en_US
dc.subject EDB en_US
dc.subject TCP en_US
dc.subject soil fumigants en_US
dc.subject saprolites en_US
dc.subject Mililani wells en_US
dc.subject Waipio wells en_US
dc.subject Oahu en_US
dc.subject Hawaii en_US
dc.subject.lcsh Dibromochloropropane -- Hawaii -- Oahu -- Environmental aspects. en_US
dc.subject.lcsh Ethylene dibromide -- Hawaii -- Oahu -- Environmental aspects. en_US
dc.subject.lcsh Groundwater -- Pollution -- Hawaii -- Oahu. en_US
dc.subject.lcsh Organic water pollutants -- Hawaii -- Oahu. en_US
dc.title WRRCTR No.181 Organic Chemical Contamination of Oahu Groundwater en_US
dc.type Report en_US
dc.type.dcmi Text en_US

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