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https://hdl.handle.net/11681/4736Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | DiGiano, Francis A. | en_US |
| dc.contributor.author | Miller, Cass T. (Cass Timothy) | en_US |
| dc.contributor.author | Yoon, Jeyong | en_US |
| dc.creator | University of North Carolina at Chapel Hill. Department of Environmental Sciences and Engineering | en_US |
| dc.creator | Dredging Operations Technical Support Program (U.S.) | en_US |
| dc.date.accessioned | 2016-03-17T13:06:34Z | en_US |
| dc.date.available | 2016-03-17T13:06:34Z | en_US |
| dc.date.issued | 1995-08 | en_US |
| dc.identifier.govdoc | Contract Report D-95-1 | en_US |
| dc.identifier.uri | http://hdl.handle.net/11681/4736 | en_US |
| dc.description | Contract Report | en_US |
| dc.description.abstract | The removal of contaminated sediments from waterways by dredging generates concern about the release of contaminants to the water column. The ability to predict the magnitude of these potential releases during the project planning process will improve decision making in regard to water quality impacts and controls or mitigation measures for the dredging project. This report describes the development of a simple laboratory test, the dredging elutriate test (DRET), to predict the concentration of contaminants in the water column at the point of dredging. The DRET is procedurally similar to the modified elutriate test developed by the Corps of Engineers to predict the contaminant concentrations in effiuent from a confined disposal facility. The test involves mixing sediment and site water, allowing the heavier solid particles to settle, sampling and supernatant, and analyzing for dissolved and particulate bound contaminants. Results of the laboratory test compared well with field data collected while dredging New Bedford Harbor sediment, which was contaminated with polychlorinated biphenyls. Most of the contaminated loading was associated with the suspended particles. | en_US |
| dc.description.sponsorship | Dredging Operations Technical Support Program (U.S.) | en_US |
| dc.description.sponsorship | U.S. Army Engineer Waterways Experiment Station | en_US |
| dc.description.sponsorship | United States. Army. Corps of Engineers | en_US |
| dc.description.tableofcontents | Preface.................vii 1-Introduction.................1 Objectives.................2 Background.................2 2-Methods.................5 Dredging Elutriate Test (DRET).................5 Analytical Methods.................7 Site and Field Tests.................7 3-Evaluation of DRET Protocol.................9 Volatilization of PCB During the DRET.................9 Sediment and Water Characteristics.................9 Total Suspended Solids and PCD from DRET.................11 Metals from DRET.................15 Batch Shaker Test.................15 Distribution of Sorbed PCB with Particle Size.................16 Correlation of Final TSS and DRET Conditions.................18 4-Field Results.................24 Field Data from New Bedford Harbor.................24 PCB and TSS Data.................24 Metals Data.................30 Comparison of Field and DRET Results.................37 5-Investigation of Particle Size Characteristics.................43 Changes in Particle Size Characteristics During Settling in the DRET.................43 Settling Characteristics of Particles.................48 Development of the Model.................53 Usefulness of the Model.................56 7-Conclusions and Recommendations.................59 Conclusions.................59 Recommendations.................61 References.................62 Appendix A: Analytical Methods.................A1 SF298 | en_US |
| dc.format.extent | 79 pages/4.65 MB | en_US |
| dc.format.medium | en_US | |
| dc.language.iso | en_US | en_US |
| dc.publisher | U.S. Army Engineer Waterways Experiment Station | en_US |
| dc.relation | http://acwc.sdp.sirsi.net/client/en_US/search/asset/1004030 | en_US |
| dc.relation.ispartofseries | Contract Report (Dredging Operations Technical Support Program (U.S.)) ; no.Contract Report D-95-1 | en_US |
| dc.rights | Approved for public release; distribution is unlimited | en_US |
| dc.source | This Digital Resource was created from scans of the Print Resource | en_US |
| dc.subject | Contaminated sediment | en_US |
| dc.subject | Dredging spoil | en_US |
| dc.subject | Dredged material | en_US |
| dc.subject | Polychlorinated biphenyls (PCB) | en_US |
| dc.subject | Dredging | en_US |
| dc.subject | Sediments | en_US |
| dc.subject | Elutriate | en_US |
| dc.subject | Water quality | en_US |
| dc.subject | Environmental management | en_US |
| dc.subject | New Bedford (Mass.) | en_US |
| dc.subject | Dredging Operations Technical Support Program (U.S.) | en_US |
| dc.title | Dredging Elutriate Test (DRET) development | en_US |
| dc.type | Report | en_US |
| Appears in Collections: | Contract Report | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 11621.pdf | Contract Report D-95-1 | 4.65 MB | Adobe PDF |  View/Open |