Most every home is sold with a "Natural Hazard Disclosure Report" - Although I don't know what 'hazards' you are referring too.
I have seen many reports in the Ardenwood area and there doesn't seem to be any major concerns and anything that doesn't show up on most reports.
recent report in Ardenwood area:
special flood area: NO
potential flooding: YES (Possible "Dam Failure" Lake Del Valle in Livermore)
fire zone: NO
wildland forest fire: NO
earthquake zone: NO
seismic zone: YES
Hope this helps.