It took crews more than seven hours to completely clear the scene of an accident yesterday in Wooster involving a tanker truck and 6,000 gallons of milk.  The tanker was northbound on Madison Avenue at around 9am when it overturned on its side at the intersection with Timken Road.  Of the 6,000 gallons of milk that spilled onto the roadway, up to 1,000 gallons flowed into a nearby creek.  Fortunately, officials say there was no significant environmental impact to either the creek or the fish living in it.