WRRCTR No.159 Decontamination of Chromium-Contaminated Soil in Hawai'i

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dc.contributor.authorDugan, Gordon L.
dc.contributor.authorGee, Henry K.
dc.contributor.authorLau, L. Stephen
dc.date.accessioned2008-07-17T22:50:20Z
dc.date.available2008-07-17T22:50:20Z
dc.date.issued1984-03
dc.description.abstractApproximately 1 841 m3 (65,000 ft^3) of chromium-contaminated soil, classified as hazardous waste (>5 mg/l chromium extract concentration as measured by the EP toxicity test) was found near the new pipe shop at the Pearl Harbor Naval Shipyard on Oahu, Hawaii. Unless treated to a safe level, the contaminated soil required disposal in a Class 1 landfill, the closest being in the continental United States. Based on simple laboratory and pilot plant procedures, the project proved that chromium could be effectively leached from the soil to a safe level by using a nearly 1:4 weighted soil to water ratio; reducing the pH to 2.5; adding sodium metabisulfite to chemically reduce chromium from Cr+6 to Cr+3 ; and then raising the pH to 8.5 to precipitate the chromium from solution. A full-scale operation, following the technology that was developed, successfully treated the soil to a safe level and subsequent testing of the treated soil at the disposal (landfill) site confirmed the effectiveness of the treatment operation.
dc.description.sponsorshipU.S. Department of the Navy Pacific Division Naval Facilities Engineering Command Pearl Harbor, Hawaii Grant/Contract No. N62742-82-C-0001
dc.format.extentviii + 23 pages
dc.identifier.citationDugan GL, Gee HK, Lau LS. 1984. Decontamination of chromium-contaminated soil in Hawai'i. Honolulu (HI): Water Resources Research Center, University of Hawaii at Manoa. WRRC technical report, 159.
dc.identifier.urihttp://hdl.handle.net/10125/2001
dc.language.isoen-US
dc.publisherWater Resources Research Center, University of Hawaii at Manoa
dc.relation.ispartofseriesWRRC Technical Report
dc.relation.ispartofseries159
dc.subjectchromium
dc.subjectsoil contamination
dc.subjectsoil treatment
dc.subjectchemical precipitation
dc.subjecthazardous waste
dc.subjectPearl Harbor Naval Shipyard
dc.subjectOahu
dc.subjectHawaii
dc.subject.lcshChromium -- Environmental aspects.
dc.subject.lcshSoil pollution.
dc.subject.lcshSoils -- Leaching.
dc.titleWRRCTR No.159 Decontamination of Chromium-Contaminated Soil in Hawai'i
dc.typeReport
dc.type.dcmiText

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