A hazardous materials spill in Brookfield has been cleaned up.  Brookfield Volunteer Fire Company responded to a property on Vale Road Friday afternoon on a report that a  tractor trailer spilled about 20 gallons of motor oil from its engine due to a damaged oil pan. Firefighters used absorbent pads and booms to contain the spill.  The trucking company hired a clean up company.  The state Department of Energy and Environmental Protection and Brookfield's Deputy Fire Marshal also responded to the scene.  There was no health or safety issues due to this spill and the environmental impact was minimal. The clean up went into the evening hours and area residents were cautioned that they might hear generators, vac trucks and other equipment operating.