ACCORDING TO WARREN CITY MANAGER MIKE HOLTZ, A TRUCK THAT WAS PICKING UP OIL FROM THE DEPARTMENT OF PUBLIC WORKS GARAGE, YESTERDAY MORNING, LEFT A VALVE OPEN SPILLING A COUPLE OF BARRELS OF MATERIAL INTO A CATCH BASIN.  THE BASIN FEEDS INTO THE ALLEGHENY RIVER IN FRONT OF PAWS ALONG THE RIVER HUMANE SOCIETY.  HOLTZ ADDED THAT CREWS FROM WARREN COUNTY EMERGENCY MANAGEMENT, THE DEP, THE PENNSYLVANIA FISH AHD BOAT COMMISSION, WARREN FIRE DEPARTMENT AND UNITED REFINING WORKED TO CLEAN UP THE AREA TO KEEP THE ENVIRONMENTAL IMPACT TO A MINIMUM.