“... inspectors will be given access to the site...”
In other words, they government has kept them out...until now...
NBC is reporting that the inspectors have entered the town.
Chemical weapons inspectors reach Syrian town of Douma
International inspectors entered the Syrian town where an alleged chemical attack was carried out earlier this month, Syrian state media reported Tuesday, after delays by Syrian and Russian authorities.
NBC News:
https://www.nbcnews.com/news/world/chemical-weapons-inspectors-reach-syrian-town-douma-n866621