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Suppression of Asbestos Fugitive Dust
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The focus of this packet of documents is to provide you with scientific and actual real use examples of the ConCover line of materials which have been used in the United States to minimize and suppress dust. The following documents focus on explaining why the NWC cover materials work better than soil, or even tarps and continue to do an excellent job even in severe weather situations, such as resisting erosion and wear caused by a flooding river which crested 23 feet or about 7 meters above its normal height. The use of the ConCover material during the construction of a retaining wall in a US Government owned landfill built for the storage of Asbestos, allowed the completion of a project without any releases into the adjacent Passaic river as noted in the first Project Profile. A list of the attached papers and photographs are set forth below:
Millington Asbestos Dump - Superfund site Project Profile
(117 kb PDF download)
Sunflower Army Ammunition Dump Project Profile
(196 kb PDF download)
St Louis Superfund Site Photo
(956 kb PDF download)
Coal Piles at Southern Electric Power Photo
(81 kb PDF download)
ConCover 180 on Pile of Contaminated Sediment Photo
(168 kb PDF download)
ConCover Material on In Situ Pile of Sediment Photo
(2.1 Mb PDF download)
Excel Spreadsheet showing savings Analysis
ConCover 180 Product Sheet
(240 kb PDF download)
ConCover 180 MSDS Sheet
(123 kb PDF download)
ConCover SW Product Sheet
(143 kb PDF download)
ConCover SW - A Bag MSDS Sheet
(122 kb PDF download)
ConCover SW - B Bag MSDS Sheet
(100 kb PDF download)
SuperSeal 40 Product Sheet
(232 kb PDF download)
SuperSeal 40 MSDS Sheet
(74 kb PDF download)
The Millington project profile established in a project for the United States Environmental Protection Agency and the Army Corps of Engineers, that the ConCover 180 material was successfully used to suppress dusting of Asbestos during the construction of a retaining wall along the Passaic River. Substantial controls were put in place to monitor air samples and to prevent the dusting of the friable asbestos that was being moved while the retaining wall was being constructed. Of more important note concerning the success of the product, Hurricane Floyd came up the East coast of the United States and created some addition problems for erosion control and possible releases of Asbestos during the cresting of the Passaic River. SuperSeal 40 was recommended by NWC as an additive to the ConCover 180 product to help in resisting in slope failures, and further asbestos material releases. The results were extraordinary since the ConCover 180 product with the SuperSeal 40 additive remained under water at a maximum depth of 23 ft (7+ meters) for 3 days without any failures.
The Sunflower Army Ammunition Dump in Kansas is another US Government project where the ConCover 180 material was chosen by the US Government and their contractor for its dust suppression capability and its ability to minimize water permeation. The need for the ConCover material was the result of the Government running out of budgeted funds to treat the unexpected excess tonnage of contaminated sediments (the government discovered 10 times the amount of contaminated material then they expected). The Government chose the ConCover material to coat/cover stockpiled contaminated sediment until sufficient funds had been allocated to complete the project. The stockpiled contaminated sediments had to be covered for a minimum period of one year to accomplish the following: suppress dusting of contaminated sediments, stabilize exposed ditch excavations, and minimize sediment loss into nearby streams. It should be noted that at the end of this project profile, the contractor the work commented about the use of the material for seeding and that they experienced a 100% improvement in seed germination using the ConCover materials, over standard hydroseeding techniques.
The successful use of the ConCover material to suppress both fugitive dust coming from contaminated sediments and VOC's which can escape or gas off while digging up or stockpiling contaminated sediment, is the result of the patented film forming technology which NWC has created using its unique blend of polymers. This technology has been tested in real life projects where air monitoring is being done 24/7. The contractors must have a product which is reliable, since if any of the environmental limits (measured in PPM) established by the Environmental Protection Agency are exceeded, the project will be shut down as a substantial cost to the Contractor. The photograph of the St Louis Superfund site is a perfect example where the contaminants were very hazardous. In this project not only were the walls and floors of recently excavated contaminated sediment coated, but the contaminated sediment in the dump trucks moving the material to a nearby newly constructed landfill were also coated.
Also attached to this package of material is a photograph of the application of the ConCover materials to coal piles at a power generating facility owned by Southern Electric Power. These materials have been successful in both minimizing water permeation and suppressing the blowing of coal dust during windy days. There are two other photographs, both of which reflect the use of the ConCover materials on contaminated sediment. One where the material is being treated in situ and the ConCover material was aimed at minimizing water permeation, as well as controlling the dusting; and the other was at a MSW landfill where contaminated sediment which was required to be removed was being stockpiled, awaiting transportation.
The excel spread sheets reflect the financial superiority and benefit of using these ConCover materials on landfill cells where the current cover materials are soil. Each cubic meter of space, which has a value of £90 before assessment of additional taxes charged by the UK government, should not be thrown away or given over to 15 cm or more soil. The value of the space which the soil occupies as daily cover for a 12 month period is equivalent to £ 2.369 million of asbestos tonnage that be placed in that area. If a site would use the ConCover materials, the annual cost would run as low as £ 37,354 for the product and another £ 7,750 for the equipment, labor, fuel and maintenance to apply the product. Compare that to the cost of applying soil and the value of the loss of space and you'll find yourself asking why you would use soil when the ConCover materials can do as good a job at a substantial reduction in cost. In other terms, if you continue to use soil as a daily cover, your likely to have to build a new cell 30% sooner than you might otherwise have had to.
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