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Wood preservation facilities, ammoniacal copper zinc arsenate: chapter C, table 20

Operation	Recommendations
Treatment process	After pressure treating, apply a final vacuum of maximum 25 kPa for at least 2 hours. The retort should be heated to between 80 and 100ºC during the vacuum process. After removal from the retort, keep the materials on the drip pad/holding area until all dripping has ceased.

2017-09-10

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Table 20. Additional Recommended Operating Practices for Process Systems