We had also itchy skin and headaches. A note about ecology - one of my basic principles is that we should try to borrow raw material from nature and return it in a way that it is in a state that nature could recycle as easy as possible. Many construction materials have appeared on the market that make us believe that we beat nature, like treated wood, vinyl siding, etc., but the problem of disposal is not addressed. Some people react in different ways to exposure to creosote. In my experience with SYP it is not uncommon to have 100 percent sapwood penetration, even though that is not a rule book requirement for proper treatment.
Treated wood saves trees.
Think how many more trees would have to be harvested if everything that is built of treated timber had to be replaced every few years. Also, alternative materials such as steel, aluminum, and concrete consume up to 15 to 20 times more energy in the manufacturing process. That means 15 to 20 times more air pollution from coal burning or 15 to 20 times more radioactive waste from nuclear generation. As far as disposal goes, the Consumer Info Sheet I posted explicitly states that appropriate disposal for creosote treated wood is by ordinary trash collection and disposal means. The CIS was approved by the U.S. Environmental Protection Agency, and I can guarantee you that the EPA didn't cut some back door deal with the industry because they would like nothing more than to see creosote treating plants put out of business.