"They would have to look at storage containers, they would have to figure all that out. But cataloging something would depend on how many sites there are; how many different munitions there are. It could take months."
And, of course, there is still a bloody civil war going on in Syria, which would make that mission even more daunting. Their work may be focused on safeguarding international security, but the OPCW also has the safety of its own staff to consider.