Lead is not the boogey-man some have made it out to be. Don't ingest it and there are no problems. This amounts to having the brains to wash your hands before eating and not letting kids gnaw on it.
I find it quite ironic that allegedly "green" groups are pushing CFLs, which contain mercury which is a problem, quite mobile once it gets loose in the environment, etc.
Your 530 degree iron sounds a bit too low to me. Ironically, a too-low iron temperature can result in heat damage to components. You can end up with an unacceptably long dwell-time and transfer lots of heat into the part, where a higher temperature will allow you to get the joint soldered and remove the heat source before the component gets so hot.
-j