I was wondering if anyone could help me out here. I have a deck and front porch that is built with the old (I think it is called CCA) pressure treated wood with the arsenic. They are both over 10 years old. I was thinking about replacing them with the composite wood, but we are planning on moving in the next few years. I would like to know if it is worth the cost. My husband doesn't think that it is a problem with the wood and does not want to spend the money. I want to do the right thing. I have read on some websites, that it initially leaches arsenic after the first rain and then it does not really leach. Then some websites seem to indicate something different. I have a 2 year old and a 6 year old who have started playing on the deck a lot and I worry about the wood. So if anyone could give me some advice on what they have found, I would appreciate it.