Yes, that's the official answer. I've seen joggers in there before 7am in the summer months, so I would say dawn to dusk.
There shouldn't be much more heavy noise from Envirowork, as they're adding the final touches to the beds. They should be installing a picket fence to the perimeter this week.
Cool, thanks guys. Want to get in there with my camera and get some early morning shots, hopefully see a few birds! As long as nobody comes and confronts me thinking I'm taking pics of them like happened today!???