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级别：
H4 In or on the ground subject to severe wetting and leaching
H5 In or on the ground subject to severe wetting and leaching, with or in fresh water
H6 In contact with sea water
TPAA的Q&A
Q2 CCA处理的砷和铬属否进入土壤DOES THE ARSENIC AND OR CHROMIUM LEACH OUT OF CCA TREATED WOOD INTO SOIL?
A. The chemistry of CCA wood preservatives results in the copper and chromium and arsenic being chemically attached (or fixed) inside the wood so that it remains in the timber. Nevertheless, highly sensitive chemical analysis may detect small amounts of these chemicals in soil next to CCA-treated wood or wiped from its surface. In most cases however, these small levels are well below the concentrations found naturally present in the environment.
Q3 马儿嚼了很多处理过的木头会不会得病或患癌 IF HORSES CHEW TREATED WOOD, WON’T THEY GET ILL, OR GET CANCER?
A. A horse would need to eat a lot of treated wood to have symptoms of toxicity or poisoning. Occasional nibbling won’t hurt a horse but for chronic chewers, it would be best to install a deterrent such as an electric fence (wire) along the top rail. Treated wood is often used to contain horses e.g. stalls and yards and whilst there have been some reports of sickness, it is not clear if this is from the preservative contained in the wood or from eating a lot of wood material. Use of treated wood to contain horses is not a common problem.
The current form of CCA preservatives used in Australia were introduced in the mid 1970s and is less ’attractive’ to horses than the earlier formulations.
Q4 儿童触摸CCA木材会不会吸收毒物 IF CHILDREN TOUCH CCA-TREATED WOOD THEY WILL GET A DOSE OF ARSENIC AND CHROMIUM, WON’T THEY? (OTHERWISE WHY DID APVMA BAN IT FOR DECKS, PLAYGROUNDS AND SOME OTHER USES?)
A. Small amounts of chemical components may be wiped from CCA-treated wood products, however these small amounts are very unlikely to cause health problems for children. If you are concerned, normal hygiene such as washing hands after contact should be used. To limit contact with CCA-treated timber around the home, you may consider painting it with a good quality paint system.
The APVMA restricted the application of CCA-treated wood in uses such as playground equipment and decks as a precautionary measure. CCA continues to be safely used in many domestic uses such as landscaping and structural framing of decks, fences etc. All CCA-treated wood must be identified as ‘treated with CCA’.
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故乡的云 (2009-12-5) tritri 
发表于 2018-4-1 15:56
