Wolman CCA preservative is pumped into the cylinder as it is carefully monitored by our computer control systems. Then the CCA preservative is forced under pressure into the wood as a result of the vacuum seal. At the end of the process, excess treating solution is pumped out of the cylinder and back to a storage tank for later reuse. The treated wood is removed. And when your wood is treated by Conrad Wood Preserving, you know you are getting the highest quality treating services.
Different applications require different amounts of preservative.
The retention or appropriate end use is indicated on a label or ink stamp. A detailed study recently conducted on the environmental suitability of CCA- treated marine piling showed that the leachate from treated piling caused lower mortality among the sea bottom creatures than the leachate from untreated controls. We also receive questions about the use of pressure treated wood in raised bed vegetable gardens. Various universities have studied CCA-treated wood in agricultural applications and found no indication of problems. Please read the study conducted proving CCA-treated lumber is safe to use in your garden.