SRS Crisafulli follows the activities of our larger corporate cousins tackling tough environmental remediation dredging projects. One of the toughest is the Hudson River EPA PCB GE cleanup.
Dredging has resumed in the Upper Hudson River for the 2012 season - Phase II Year 2. Massachusetts based Cashman Dredging & Marine Contracting Co., LLC is performing the dredging. The crews are working 24/6 on this seasonal, multi-year project.
350,000 cubic yards, or 400,000 tons, of sediment will be dredged from the Hudson River this year. The sediment will be unloaded, processed, dewatered, and disposed of.
Cheers to Cashman Dredging & Marine Contracting as they move forward on this difficult river cleanup.
GE has published a series of technical papers for the Hudson River Dredging Project. As this is a PCB project, evaluation of resuspension is critical. A more abstract issue is a future looking model of species weighted fish fillet average PCB concentration for 2020 and 2046.
You may also read about the Hudson River PCBs Superfund Site on the EPA website. This project was debated and then planned for many years. It is good news to see the execution phase vigorously continued.
This report presents the results of asphalt mix design and testing using glass aggregate produced by Minergy. Glass aggregate from the MinergyWinneconne Pilot Plant produced from sediments dredged from the Fox River was used in the design and testing. Two sizes of glass aggregates were used in the asphalt mix designs. One size has a gradation that is naturally produced by the plant during the incineration process. The other size consisted of glass aggregate crushed to meet ASTM: C33 gradation requirements for...
Despite the recent efforts to investigate the distribution and fate of persistent organic pollutants in the tropical and subtropical regions of Asia, very little was known about the temporal change of polychlorinated biphenyls (PCBs) in the environmental ecosystem of China. In this study, three dated sediment cores collected from the Pearl River Delta of southern China were analyzed for a large suite of PCB congeners, from which the temporal profiles of PCB abundances, fluxes, and homologue patterns were constructe...
USA – Baltic International Symposium on Advances in Marine Environmental Research, Monitoring and Technologies. Klaipeda, Lithuania. June 15-17, 2004Global commerce relies heavily on waterborne transportation. Innovative, economical and environmentally sound ways to manage dredged materials, which result from ongoing channel maintenance and harbor development projects, are required to; i) minimize or eliminate potential adverse environmental impacts of contaminated dredge sediment deposition; and ii)...
The Glass Furnace Technology (GFT) treatment process was developed by Minergy Corporation (Minergy) as an ex situ remediation technology to treat river sediment contaminated with polychlorinated biphenyls (PCBs), other organic compounds, and metals. An evaluation of the technology was conductedby the U.S. Environmental Protection Agency (EPA) Superfund Innovative Technology Evaluation(SITE) Program. The demonstration of the GFT, which consisted of a drying process and a melting process, was completed at the Hazen...
Project Scope
Develop and operate a Regional Dredged Develop and operate a Regional Dredged
Material Disposal Facility at Mare Island that: Material Disposal Facility at Mare Island that:
- Provides a disposal facility for both clean and Provides a disposal facility for both clean and unsuitable dredged material for open water unsuitable dredged material for open water
disposal disposal
- Supports the San Francisco Bay Long Term Supports the San Francisco Bay Long Term Management Strategy which emphasizes...
In the July 2002 issue dedicated to environmental dredging of World Dredging Mining & Construction, DEC present its newly developed in-situ immobilisation and capping technique for polluted sediments, the 3SI-technique.
DEME Environmental Contractors N.V. (DEC), a Belgium-based company specialising in remediation and recycling or disposal of water bottom sediments, is offering a vast range of new home-grown clean-up technologies to the world`s environmental engineering market. The company`s core activities...
The Kemwater Recycling Process – KREPRO for treatment of sewage sludge is based on a completely new separation technology, which uses existing knowledge in an innovative way. It reduces both the organic and inorganic content of the sludge. The organic content is re-duced by about 30% and the inorganic about 70% if digested sludge is treated. All metals and salts are dissolved; the remaining undissolved inorganics are mainly silicates like sand and grit.
In constast, most sludge treatment technologies used today...
Introduction
There is considerable public, scientific and regulatory concern over the possible adverse health effects of chronic exposure to trace levels of persistent organic pollutants. The class of compounds made up of the polychlorinated dibenzo-p-dioxins (PCDD) and polychlorinated dibenzofurans (PCDF), often collectively known as dioxins, has received widespread attention and attracted a great deal of research, following the accidental release of the most toxic of these (2,3,7,8 TCDD) at Seveso in 1976.
Diox...
If you live in a house, apartment or similar abode, you produce waste. Right? You probably can`t go a week without producing waste. All kinds of waste. Call it trash if you want. It`s still waste. And if you don`t live where recycling is mandatory or there is no outlet for your voluntary environmental tendencies, everything goes into the trash - bottles, cans, cardboard, plastics, bottle caps, paint cans, light bulbs, fluorescent lamps, camera and flashlight batteries, pesticide bottles, pressurized spray cans,...
The minimization of wastes requiring disposal is increasingly important as available disposal options become more and more constrained, and particularly as more substances enter everyday use which are not readily decomposed in the natural environment and which can present long term hazards. This note sets out some basic principles for waste minimization in industrial processes, where `minimization` is taken to include avoidance of the generation of wastes where practical and the productive utilization of any...
Introduction
The utilization of fungal biodegradation involves the controlled usage of these specially cultivated fungi to treat contaminants.
White Rot Fungus
White rot fungus has been reported to degrade a wide variety of organopollutants because of its lignin-degrading or wood-rotting enzymes. Two different treatment configurations have been tested for white rot fungus, in situ and bioreactor. An aerobic system using moisturized air on wood chips is used in a reactor for biodegradation. A reactor was used...
Slurry phase biological treatment involves the controlled treatment of excavated soil in a bioreactor. The excavated soil is first processed to physically separate stones and rubble. The soil is then mixed with water to a predetermined concentration dependent upon the concentration of the contaminants, the rate of biodegradation, and the physical nature of the soils. Some processes pre-wash the soil to concentrate the contaminants. Clean sand may then be discharged, leaving only contaminated fines and washwater...
Introduction
In situ soil flushing is the extraction of contaminants from the soil with water or other suitable aqueous solutions. Soil flushing is accomplished by passing the extraction fluid through in-place soils using an injection or infiltration process. Extraction fluids must be recovered from the underlying aquifer and, when possible, they are recycled.
Cosolvent Enhancement
Cosolvent flushing involves injecting a solvent mixture (e.g., water plus a miscible organic solvent such as alcohol) into either...
Introduction
The principle of electrokinetic remediation relies upon application of a low-intensity direct current through the soil between ceramic electrodes that are divided into a cathode array and an anode array. This mobilizes charged species, causing ions and water to move toward the electrodes. Metal ions, ammonium ions, and positively charged organic compounds move toward the cathode. Anions such as chloride, cyanide, fluoride, nitrate, and negatively charged organic compounds move toward the anode. The...
Introduction
Thermally enhanced SVE is a full-scale technology that uses electrical resistance/electromagnetic/fiber optic/radio frequency heating or hot-air/steam injection to increase the volatilization rate of semi-volatiles and facilitate extraction.
Thermally enhanced SVE is normally a short- to medium-term technology.
Electrical Resistance Heating
Electrical resistance heating uses an electrical current to heat less permeable soils such as clays and fine-grained sediments so that water and contaminants...
` An environmental audit is a process to assess the nature and extent of environmental concerns at an existing facility -- an industrial plant, an abandoned site, a mine area, or any other site where the existence of industrial pollution problems is identified or anticipated. It is used to provide data on the extent of pollution in an industrial area, to quantify the scale of pollution at a particular site, or to examine the causes and potential remedies of problems at a facility. This note provides guidance on...
Horizontal well technology has been incorporated into many current environmental remediation applications (and associated contaminants), such as in situ bioremediation, air sparging, vacuum extraction, soil flushing, free product recovery, etc. Ac cording to information reviewed, this technology is most applicable to sites with relatively shallow soil and/or groundwater contamination, and can potentially enhance remediation efforts at sites low hydraulic conductivities.
Types of horizontal wells include both...
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