Generally, the Government is not responsible for delays caused by third parties, even other contractors at its own project site, unless the Government affirmatively indicates the site will be ready and available.
The government need not follow the industry standard. It can do less or more.
Have you ever done exactly what you were supposed to do, but it didn’t work and you were blamed anyway? Nevertheless, if contractors follow the owner’s plans and it still doesn’t work, the contractor may be without fault – this is as it should be.