The generator arrives before the utility connection, the boiler loop is needed before the permanent meter set is ready, and the gas supply has to work now. A mobile CNG trailer or LNG vaporizer can solve the supply gap, but only if the downstream equipment sees stable...
You're on site, the schedule is tight, and the utility line still isn't ready. The building is close to an occupancy inspection, the boiler room needs heat, and the generator load test can't wait, so a mobile gas trailer shows up to keep the job moving....
