I am new to smoking, so I have a question about some pecan wood I received. I have an uncle who gave my a bunch of pecan wood that has been sitting for about 8 years. The wood is from pecan trees that were used on a pecan farm. One guy there told me about the chemicals used while the trees were alive to protect from disease, bugs, etc. Does this now make the wood unsafe for smoking? Is all wood like this? Should I just not use it or can I just cut the outside off and use the rest of it? Any info would be greatly appreciated. Thanks!