In my last post on raised beds, I have a photo of a staple on the side of one of my new raised beds, which prompted Grace, to leave a comment voicing her concerns (and rightly so)
quote: The boards you're using to edge your beds look like the ones that are treated with a toxic preservative. It's a cocktail containing arsenic and can leach into the soil and into your food supply. If your boards are newly purchased they're probably safe since a few years ago the arsenic treatment was banned.
I thank grace for raising this question, because it led me to consider, how many other new gardeners are not familiar with the use of pressure treated wood in their gardens.
First of all I turned to the internet, and found many articles on the subject, then I called a friend who is a toxicologist. My friend was interested in what I was asking, and said he had not looked into the latest information on what is being used on pressure treated wood, but will do so, and get back to me. As a toxicologist he always says " any chemical, which also includes some we think of as harmless, will hurt you if you get enough of it"
The sides of the raised bed in my garden,are constructed with new wood, which has been treated with different chemicals from those used previous to 2003, but there is still a question, are these still safe. HERE is one article I found. ANOTHER and ANOTHER
It seems there are many opinions on this subject, so, I am going to wait for more information from my learned toxicologist friend before I form my own ideas.