I live here in Colorado and I have been trying to find out what the legal DB level is. I talked to a guy with the FS here and he had no idea. He told me not to worry because they don't have any equipment to check. What is it in CA? Wouldn’t it be the same on all national forests? I am looking for a government site preferably USDA Forest service that states sound requirements for 2003. Any other articles or links would also be helpful. I know allot of you guys out there have some good info. Thanks for any help.