Many people I know have been concerned about recent legislation that requires manufacturers to phase out the use of cca (chromated copper arsenate) preservative in pressure treated wood. I too have some concerns , so I've been checking it out, reading what the govt and the mfgrs had to say, and talking to the people at my local lumberyards. Here's what I found: -the change isnt required until the end of 2003. -the transition to using acq(alkaline copper quaternary)preservative is already well under way. -acq has been used in Japan and Europe for a decade. -acq has been available in the US for 7 years now, with more than a billion board feet sold in the US last year. - all of the lumberyards in my county have been selling acq treated wood for 3 years or more. the largest has been selling only acq and not cca for more than a year.(I've been using the "new" stuff without even knowing it) -around here at least, acq treated wood is the same price and comes with the same warranty as the cca treated. -its available pretty much everywhere. So it seems that the rumors are unfounded, no shortages, no price increase, no loss of performance. Now, I'm just a regular guy checking this out, I'd still like to learn more. Anyone have more input?