Here is our co policy (so you have yet another perspective) If we send out the on call man on a W/E or he gets an automatic 4 hours at OT rate. If he gets sent out on a work day after hours he gets 3 hours at OT. Our guys have company vans so there is no mileage or gas issue. If for some reason a guy has to use his own vehicle he would get paid all mileage to/from. If we didn't do that it would be difficult if not impossible to get anyone to go out on a W/E.