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Author : Stan T. Lebow
Publisher :
ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.:/5 (319 download)
Download or read book Effect of Prestain on the Release Rate of Copper, Chromium, and Arsenic from Western Hemlock written by Stan T. Lebow and published by . This book was released on 1999 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Stan T. Lebow
Publisher :
ISBN 13 :
Total Pages : 6 pages
Book Rating : 4.:/5 (247 download)
Download or read book Effect of Prestain on the Release Rate of Copper, Chromium, and Arsenic from Western Hemlock written by Stan T. Lebow and published by . This book was released on 1999 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Stan T. Lebow
Publisher :
ISBN 13 :
Total Pages : 12 pages
Book Rating : 4.:/5 (31 download)
Download or read book Effect of Prestain on the Treatability of Western Hemlock with Chromated Copper Arsenate written by Stan T. Lebow and published by . This book was released on 1999 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: To enhance the appearance of the treated product, a stain is often sprayed onto western hemlock lumber (Tsuga heterophylla (Raf.) Sarg.) prior to treatment with chromated copper arsenate (CCA-C). There is concern that this stain might interfere with the penetration and retention of CCA-C during the subsequent pressure treatment. This study compared the penetration and retention of CCA-C in prestained and nonstained end-matched specimens of western hemlock lumber. Results indicate that the weight gain retention of CCA-C solution was slightly but significantly impaired by the prestain treatment. Assayed concentration levels of copper, chromium, and arsenic detected in the treated wood were also slightly less in the prestained samples than in the nonstained samples, especially for the inner assay zone. No significant difference in average penetration was observed between the prestained and nonstained specimens, although two of the prestained specimens did have much less penetration than did their nonstained counterparts. The differences in treatability noted in this study were too small to be of concern in commercial practice.
Author :
Publisher :
ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.:/5 (31 download)
Download or read book Role of Construction Debris in Release of Copper, Chromium, and Arsenic from Treated Wood Structures written by and published by . This book was released on 2000 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent research on the release of wood preservatives from treated wood used in sensitive environments has not considered the potential contribution from construction residues. This study sought to develop leaching rate data for small construction debris and compare those to the release rate from treated wood itself. Western hemlock boards were pressure treated with chromated copper arsenate Type C (CCA-C), and then common construction tools were used to generate sawdust or shavings from those boards. These wood particles were then leached in deionized water, and the leaching rate was compared with that of solid wood samples cut from the same specimen. Release rate data from this study were also compared with those from endmatched samples that were leached in artificial rain in an earlier study. The release rates of copper, chromium, and arsenic from CCA-C treated chain saw sawdust, circular saw sawdust, and spade bit shavings were many times higher than from solid wood when samples were immersed in water. There was little difference in the release rates among the three types of shavings and sawdust, despite differences in their particle sizes. The rates of release from decking exposed to rainfall were many times lower than that of construction debris or solid wood continually immersed in water. These results show the importance of minimizing the amount of construction debris that is allowed to enter the aquatic environment. However, example calculations also demonstrate that if reasonable efforts are made to minimize release of construction debris, the contribution of these particles to the overall release of preservative from the structure will be minimal.
Author : Stan T. Lebow
Publisher :
ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.:/5 (319 download)
Download or read book Effect of Prestain on the Treatability of Western Hemlock with Chromated Copper Arsenate written by Stan T. Lebow and published by . This book was released on 1999 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: To enhance the appearance of the treated product, a stain is often sprayed onto western hemlock lumber (Tsuga heterophylla (Raf.) Sarg.) prior to treatment with chromated copper arsenate (CCA-C). There is concern that this stain might interfere with the penetration and retention of CCA-C during the subsequent pressure treatment. This study compared the penetration and retention of CCA-C in prestained and nonstained end-matched specimens of western hemlock lumber. Results indicate that the weight gain retention of CCA-C solution was slightly but significantly impaired by the prestain treatment. Assayed concentration levels of copper, chromium, and arsenic detected in the treated wood were also slightly less in the prestained samples than in the nonstained samples, especially for the inner assay zone. No significant difference in average penetration was observed between the prestained and nonstained specimens, although two of the prestained specimens did have much less penetration than did their nonstained counterparts. The differences in treatability noted in this study were too small to be of concern in commercial practice.
Author :
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ISBN 13 :
Total Pages : 574 pages
Book Rating : 4.:/5 (4 download)
Download or read book Research Note FPL. written by and published by . This book was released on 1979 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 672 pages
Book Rating : 4.:/5 (4 download)
Download or read book Research Paper FPL-RP written by and published by . This book was released on 1986 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.3/5 (91 download)
Download or read book Dividends from Wood Research written by and published by . This book was released on 1999-07 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 134 pages
Book Rating : 4.:/5 (319 download)
Download or read book Environmental Impact of Preservative-treated Wood in a Wetland Boardwalk written by and published by . This book was released on 2000 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 564 pages
Book Rating : 4.E/5 ( download)
Download or read book Research Note FPL-RN. written by and published by . This book was released on 1986 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 658 pages
Book Rating : 4.3/5 (243 download)
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 2000 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.:/5 (319 download)
Download or read book Guidelines for Design, Installation, and Maintenance of a Waterproof Wearing Surface for Timber Bridge Decks written by and published by . This book was released on 2001 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : William Turner Simpson
Publisher :
ISBN 13 :
Total Pages : 154 pages
Book Rating : 4.F/5 ( download)
Download or read book Resistance Moisture Meter Correction Factors for Four Tropical Wood Species written by William Turner Simpson and published by . This book was released on 1994 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 414 pages
Book Rating : 4.3/5 (91 download)
Download or read book Health Effects Assessment Summary Tables written by and published by . This book was released on 1997 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309076293
Total Pages : 242 pages
Book Rating : 4.3/5 (9 download)
Download or read book Arsenic in Drinking Water written by National Research Council and published by National Academies Press. This book was released on 2001-12-26 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: Having safe drinking water is important to all Americans. The Environmental Protection Agency's decision in the summer of 2001 to delay implementing a new, more stringent standard for the maximum allowable level for arsenic in drinking water generated a great deal of criticism and controversy. Ultimately at issue were newer data on arsenic beyond those that had been examined in a 1999 National Research Council report. EPA asked the National Research Council for an evaluation of the new data available. The committee's analyses and conclusions are presented in Arsenic in Drinking Water: 2001 Update. New epidemiological studies are critically evaluated, as are new experimental data that provide information on how and at what level arsenic in drinking water can lead to cancer. The report's findings are consistent with those of the 1999 report that found high risks of cancer at the previous federal standard of 50 parts per billion. In fact, the new report concludes that men and women who consume water containing 3 parts per billion of arsenic daily have about a 1 in 1,000 increased risk of developing bladder or lung cancer during their lifetime.
Author : Alena Mudroch
Publisher : CRC Press
ISBN 13 : 9780367449407
Total Pages : 256 pages
Book Rating : 4.4/5 (494 download)
Download or read book Handbook of Techniques for Aquatic Sediments Sampling written by Alena Mudroch and published by CRC Press. This book was released on 2019-12-09 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: This up-to-date revision of a bestseller sets the standard for planning and implementing cost-effective sediment sampling programs. Handbook of Techniques for Aquatic Sediments Sampling, Second Edition is the only comprehensive text on procedures for sampling bottom sediments, suspended sediments, and sediment pore water. Practical guidance is also provided for sample handling and preservation to ensure accurate physicochemical analysis. No other reference source provides more tools for obtaining representative samples for evaluating potential contaminant effects on aquatic environments.
Author : Tiina Santonen
Publisher : World Health Organization
ISBN 13 : 9241530766
Total Pages : 101 pages
Book Rating : 4.2/5 (415 download)
Download or read book Inorganic Chromium(III) Compounds written by Tiina Santonen and published by World Health Organization. This book was released on 2009 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document on inorganic chromium (III) compounds provides summaries of the relevant scientific information concerning the potential effects of these chemicals upon human health and/or the environment. Chemical safety cards on the most common inorganic trivalent chromium compounds are reproduced in this document.
