The evidence is not just visual. Unfortunately, there have been instances of structural failure. So local and state building officials are on the lookout for insufficiently treated Douglas fir lumber resulting from misinterpretations of the AWPA standards. Wise specifiers and buyers know the answer. Specifications for Chemonite pressure-treated wood products should name the product, intended use and current applicable standards enumerated below which will cover all details involved in the pressure treatment including penetration and retention.
Specific standards are available from any of our offices upon request.
This is a literature review and assessment of the environmental risks associated with the use of ACZA and CCA treated wood as well as a description of the performance of the treated product in aquatic environments. No studies were available describing metal leaching from commodity size ACZA wood products. Based on the paucity of data, no attempt will be made to predict losses to aquatic environments. However, the available data suggests that fixation is more permanent in ACZA than in either CCA or ACA products. Summary and Conclusion Copper, chromium, arsenic and zinc are ubiquitous in all aquatic enviroments.