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Pentachlorophenol (PCP) is an ... PCP was used in New Zealand as a timber preservative and antisapstain treatment, but since 1988 is no longer used. ... Non-CCA Wood ...
The plant operated from 1902 until 1981, when the company filed for bankruptcy. Before 1950, creosote was the primary wood preservative chemical, and after 1950 pentachlorophenol (PCP) became the preferred chemical. Prior to 1970, operators discharged liquid process wastes into two onsite, unlined, percolation ponds which were allowed to ...
Creosote was the first wood preservative to gain industrial importance more than 150 years ago and it is still widely used today for protection of industrial timber components where long service life is essential. Creosote is a tar-based preservative that is commonly used for utility poles and railroad ties or sleepers.
The wood preservative pentachlorophenol often contained dioxins and dibenzofurans as impurities. [71] The Stockholm Convention banned the production and use of dioxins in 2001. Sources
Copper naphthenate is an active ingredient used predominantly in industrial and commercial wood preservation for non-pressure (dip/brush/spray) and pressure treatments (vacuum/full cell) to protect against fungal rot, decay, termites and wood-boring insects in unfinished wood and various fabricated wood products. This preservative is also used ...
Compounds involved include the wood preservative pentachlorophenol, and also herbicides such as 2,4-dichlorophenoxyacetic acid (or 2,4-D) and 2,4,5-trichlorophenoxyacetic acid (2,4,5-T). Higher levels of chlorination require higher reaction temperatures and greater dioxin production.
From 1948 to 2001, the Oroville Plant conducted the wood treatment operations to prevent wood from deteriorating. In 1963, an on-site fire released 20,000 gallons of pentachlorophenol (PCP) from tanks onto the soil. Another fire was documented in 1987 releasing high levels of dioxins.
Timber preservatives include chromated copper arsenate (CCA), alkaline copper quaternary (ACQ), copper azole (CuAz), borates, sodium and potassium silicate, oil-based preservatives, such as creosote and pentachlorophenol, light organic solvent preservatives (LOSP), propiconazole-tebuconazole-imidacloprid, epoxy resins, wood acetylation, natural ...
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