What time contained by the morning can a builder start work on a building site next to diggers, machinery etc?

in Texas. Can they start working at 4 am? thanks
Answers:
I don't know what the regulation says but I would say in recent times consider the neighbours. It would be polite not to start until you think they would have woken up, possibly at 7:30am or so. If you got woken up at 4am by a noisy digger subsequent door, you wouldn't be very happy, would you?
7am to 11pm

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