www.ccaresearch.org/tag10min.htm -
[Cached Version]
Published on: 7/28/2000
Last Visited: 6/24/2008
George Parris, Ph.D., American Wood Preservers Institute, Fairfax, VA
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George Parris: The red stain used on the mulch, which is an iron compound, may affect leaching.
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George Parris: Please define the term % volatiles?
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George Parris: Why was the one sample so high at 216 mg/kg?
Response: That particular sample could have been influenced by sawdust, perhaps.
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George Parris: The background concentration determined for Florida assumes that the soils are un-impacted by human activity.
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George Parris and Several Others from the Audience: We do not consider that the unknown treated wood should be included within the leaching study.
Response: It was presented as an opportunity.
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George Parris: A considerable amount of toxicity information is available in the literature on biofouling.There's a researcher by the name of Alberquerque that has some information.
George Parris: There should be no arsine gas in biological systems.
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George Parris: Tom Roberts of the FDEP may have a database available on arsenic speciation.
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George Parris: The view that chromium III is immobile is a generalization.Chromium III combines with many different compounds, all of which migrate differently.
8. Discussion, Including Recommendations for "Year 5" Research
George Parris: Consider using additives in the combustion process that will bind CCA to the ash and therefore prevent leaching.
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George Parris: The problem with adding a color is due to the fact that it tends to get bleached-out with U.V. light.
George Parris: Speciation should include the methylated forms.
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George Parris: Consider the feasibility of flattening the wood under pressure.By flattening the wood, there may be increased resistence to biodegredation.