





2) are hydraulically powered. All others have a large second engine that powers the vacuum unit (think of it as a 42 horse-powered lawnmower). It's loud, and very dirty (now think of the exhaust of a lawnmower times 10). Because Night Hawk vacuum units are powered hydraulically, there is no pollution and excess noise. We drive quieter and cleaner, all night, every night! If there are residential properties which border yours, we won't wake them up in the middle of the night The only sound is that of a normal pickup truck. In fact, we have been hired by those who have sound sensitive situations.
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