// get all project areas
IProcessItemService processItemService = (IProcessItemService)teamRepository.getClientLibrary(IProcessItemService.class);
		 List<?> list = processItemService.findAllProjectAreas(IProcessClientService.ALL_PROPERTIES, null);

//for each project area from the list above, get the list of handles for all recorded states
List<IProjectArea> states = teamRepository
					.itemManager().fetchAllStateHandles(project, null);

//get complete states for all the handles
states = teamRepository.itemManager().fetchCompleteStates(states, null);
long firstModified = Long.MAX_VALUE;
//go through all the states...
for (int i = 0; i < states.size(); ++i) {
//...and find the one with the earliest modification date
//note that they appear on the list in random order, so you need to go through them all   
    IProjectAreaHandle projectState = states.get(i);
    ProjectAreaImpl fullState = (ProjectAreaImpl) projectState.getFullState();
    if (fullState != null) {
        //check if the modification date of the current state is earlier than the earliest recorded so far
        Date modified = fullState.getModified();
	if (modified.getTime() < firstModified) {
            //if so, this is the new earliest known modification
	    firstModified = modified.getTime();
	}
    }
 }
//print results:
System.out.print(project.getName() + " ");
System.out.print(new Date(firstModified));