The Hydrovac hydroexcavator from Presvac 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. A knockout feature in the debris tank minimizes carryover. Modular filtration configured to the blower size provides blower protection and minimal maintenance. It comes with a heavy-duty 8-inch boom up to 25 feet long with six-way hydraulic power and wireless controls for all boom functions, water pump (soft start), vacuum breaker and truck engine speed. 800/387-7763; www.presvac.com