Environmental Impact Of Preservative Treated Wood In A Wetland Boardwalk PDF Download
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Author | : |
Publisher | : |
Total Pages | : 134 |
Release | : 2000 |
Genre | : Wood preservatives |
ISBN | : |
Download Environmental Impact of Preservative-treated Wood in a Wetland Boardwalk Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 126 |
Release | : 2000 |
Genre | : Wood preservatives |
ISBN | : |
Download Environmental Impact of Preservative-treated Wood in a Wetland Boardwalk Book in PDF, ePub and Kindle
Forest Service, Bureau of Land Management, and industry partners are cooperating in a study of the leaching and environmental effects of a wetland boardwalk. The construction project is considered gbsworst casegcs because the site has high rainfall and large volumes of treated wood were used. Separate boardwalk test sections were constructed using untreated wood or wood treated with ammoniacal copper quat Type B (ACQ--B), ammoniacal copper zinc arsenate (ACZA), chromated copper arsenate Type C (CCA--C), or copper dimethyldithiocarbamate (CDDC). Part I of this report focuses on leaching of preservative components. Surface soil, sediment, and water samples were removed before construction and at intervals after construction to determine the concentrations and movement of leached preservatives. The preservatives released measurable amounts of copper and/or chromium, zinc, or arsenic into rainwater collected from the wood, and elevated levels of preservatives were found in the soil and/or sediment adjacent to the treated wood. With few exceptions, elevated environmental concentrations of preservative components were confined to within close proximity of the boardwalk. Part II of this report focuses on the effects of boardwalks treated with CCA, ACZA, and ACQ--B on populations of aquatic invertebrates. The experimental variables were total species richness (total number of taxa), total sample abundance (number of organisms/sample), dominant sample abundance (p3s1% total specimens in vegetation, artificial substrate, and infaunal samples), and Shannongass and Pielougass indices. The infaunal samples contained the largest mean number of animals and the highest total taxa richness. Although measurable increases occurred in water column and sediment preservative concentrations, no taxa were excluded or significantly reduced in number by any preservative treatment.
Author | : Timothy G. Townsend |
Publisher | : CRC Press |
Total Pages | : 521 |
Release | : 2006-06-02 |
Genre | : Science |
ISBN | : 1420006215 |
Download Environmental Impacts of Treated Wood Book in PDF, ePub and Kindle
Responding to a heightened awareness of the possible adverse effect of treated wood, this book presents multidisciplinary research results and fundamental information on regulations, wood treatment alternatives, and documentation of environmental releases. It examines the impact of treated wood on water, soil, and organisms. Several chapters discuss ways to measure exposure and review various approaches to risk assessment and management. Case studies address human health effects of exposure. The book also presents state-of-the-art disposal technologies, new preservative compounds, and recent developments related to phase outs of certain treated wood products.
Author | : |
Publisher | : |
Total Pages | : 40 |
Release | : 2001 |
Genre | : Bridges |
ISBN | : |
Download Guidelines for Design, Installation, and Maintenance of a Waterproof Wearing Surface for Timber Bridge Decks Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 2 |
Release | : 2001 |
Genre | : Coatings |
ISBN | : |
Download Environmental impact of preservative-treated wood Book in PDF, ePub and Kindle
Author | : James Scott Groenier |
Publisher | : |
Total Pages | : 52 |
Release | : 2006 |
Genre | : Bridges |
ISBN | : |
Download Preservative-treated Wood and Alternative Products in the Forest Service Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 672 |
Release | : 1986 |
Genre | : Forest products |
ISBN | : |
Download Research Paper FPL-RP Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 20 |
Release | : 2000 |
Genre | : Forests and forestry |
ISBN | : |
Download Dividends from Wood Research Book in PDF, ePub and Kindle
Author | : Kenneth M. Brooks |
Publisher | : |
Total Pages | : 108 |
Release | : 2000 |
Genre | : Wood preservatives |
ISBN | : |
Download Assessment of the Environmental Effects Associated with Wooden Bridges Preserved with Creosote, Pentachlorophenol, Or Chromated Copper Arsenate Book in PDF, ePub and Kindle
Timber bridges provide an economical alternative to concrete and steel structures, particularly in rural areas with light to moderate vehicle traffic. Wooden components of these bridges are treated with chromated copper arsenate type C (CCA), pentachlorophenol, or creosote to prolong the life of the structure from a few years to many decades. This results in reduced transportation infrastructure costs and increased public safety. However, the preservative used to treat the wooden components in timber bridges is lost to the environment in small amounts over time. This report describes the concentration of wood preservatives lost to adjacent environments and the biological response to these preservatives as environmental contaminants. Six bridges from various states were examined for risk assessment: two creosote treated bridges, two pentachlorophenol-treated bridges, and two CCA-treated bridges. In all cases, the largest bridges located in biologically active environments associated with slow-flowing water were selected to represent worst-case analyses. Sediment and water column concentrations of preservative were analyzed upstream from, under, and downstream from each bridge. The observed levels of contaminant were compared with available regulatory standards or benchmarks and with the quantitative description of the aquatic invertebrate community sampled from vegetation and sediments. Pentachlorophenol- and creosote-derived polycyclic aromatic hydrocarbons (PAHs) were not observed in the water near any of the selected bridges. However, low levels of PAHs were observed in the sediments under and immediately downstream from these bridges. Pentachlorophenol concentrations did not approach toxicological benchmarks. Sediment concentrations of naphthalene, acenaphthylene, and phenanthrene exceeded the probable effect level. Metal levels at the bridges treated with CCA were less than predicted effect levels, in spite of questionable construction practices. Adverse biological effects were not observed in the aquatic invertebrate community or laboratory bioassays conducted on water and sediments sampled at each of the bridges. Results of this study reveal the need to follow the construction information found in Best Management Practices for the Use of Treated Wood In Aquatic Environments published by Western Wood Preservers Institute. Regulatory benchmarks used in risk assessments of this type need to be indexed to local environmental conditions. The robust invertebrate communities associated with slow-moving streams over soft bottoms were not susceptible to the concentrations of PAHs that would be expected to affect more sensitive taxa, which typically are located in faster moving water over hard bottoms. Contaminants released from timber bridges into these faster systems (where more sensitive taxa are located) are significantly diluted and not found at biologically significant levels.
Author | : |
Publisher | : |
Total Pages | : 8 |
Release | : 2000 |
Genre | : Leaching |
ISBN | : |
Download Role of Construction Debris in Release of Copper, Chromium, and Arsenic from Treated Wood Structures Book in PDF, ePub and Kindle