Creosoted Piling Investigation For The San Francisco Oakland Bay Bridge
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Creosoted Piling Investigation For The San Francisco Oakland Bay Bridge
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Author :
language : en
Publisher:
Release Date : 1960
Creosoted Piling Investigation For The San Francisco Oakland Bay Bridge written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1960 with categories.
Proceedings
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Author : American Wood-Preservers' Association
language : en
Publisher:
Release Date : 1962
Proceedings written by American Wood-Preservers' Association and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1962 with Wood categories.
List of members in each vol. (except v. 2).
Report Of Proceedings
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Author : American Wood-Preservers' Association
language : en
Publisher:
Release Date : 1964
Report Of Proceedings written by American Wood-Preservers' Association and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1964 with Wood categories.
List of members in each vol. (except v. 2).
Report Of Creosoted Piling In Galveston Bay Bridge Of Santa Fe Railway Company
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Author : B. F. Ridgway
language : en
Publisher:
Release Date : 1914
Report Of Creosoted Piling In Galveston Bay Bridge Of Santa Fe Railway Company written by B. F. Ridgway and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1914 with Creosote categories.
Proceedings Annual Meeting Of The American Wood Preservers Association
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Author : American Wood-Preservers' Association
language : en
Publisher:
Release Date : 1965
Proceedings Annual Meeting Of The American Wood Preservers Association written by American Wood-Preservers' Association and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with Wood categories.
Determination Of Residual Creote In Disks From Fender Piling After Thirty Years Service In The San Francisco Oakland Bay Bridge
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Author : R. H. Baechler
language : en
Publisher:
Release Date : 1965
Determination Of Residual Creote In Disks From Fender Piling After Thirty Years Service In The San Francisco Oakland Bay Bridge written by R. H. Baechler and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with categories.
Assessment Of The Environmental Effects Associated With Wooden Bridges Preserved With Creosote Pentachlorophenol Or Chromated Copper Arsenate
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Author : Kenneth M. Brooks
language : en
Publisher:
Release Date : 2000
Assessment Of The Environmental Effects Associated With Wooden Bridges Preserved With Creosote Pentachlorophenol Or Chromated Copper Arsenate written by Kenneth M. Brooks and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Wood preservatives categories.
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.
Wood Preserving
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Author :
language : en
Publisher:
Release Date : 1971
Wood Preserving written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Wood categories.
Building And Industrial News
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Author :
language : en
Publisher:
Release Date : 1931
Building And Industrial News written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1931 with Architecture categories.
Wood Preserving News
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Author :
language : en
Publisher:
Release Date : 1971
Wood Preserving News written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Wood categories.