I have a project that has operations 7 days a week. About 75% of workers come to the site Mon-Thu, and the other 25% of the workers come to the site Fri, Sat and Sun. Therefore, this is no single day where all workers overlap at the site.

Would it be acceptable to administer the survey on two different days? For example, on a Thursday for the weekday group and on a Sunday for the weekend group.

The reason for my question is: we would like to administer the survey to all building occupants (approach 1), as opposed to sampling, so that we can capture any possible alternative vehicles, carpools, etc.