The Presvac Hydrovac hydroexcavator is designed for cold-weather operation and is available in a version in full compliance with DOT collection and transportation of hazardous materials. The high-vacuum blower allows extraction of all types of soils, gravel, rock, clay, water and silt material. Knockout features in the debris tank minimize carryover. Modular filtration configured to the blower size provides blower protection and requires minimal maintenance. It has a heavy-duty 8-inch boom up to 25 feet long, with six-way hydraulic power and wireless controls for all boom functions, soft-start water pump, vacuum breaker and truck engine speed. 800/387-7763; www.presvac.com