Team 800 was dispatched to Latrobe, Westmoreland County to a home heating oil spill from an overturned 275 gallon tank of a residence subdivision 1 garage/basement. The home lies in an area where drainage accumulates from streets, dwelling rain discharge, parking areas, and collects in the low lying area. This would be classified as an overland flooding area (not near a river, stream, or creek) and filled the dwelling garage/basement area with water. The subsequent rise of flood water dislodged and flipped, 1 of 2, 275 gallon tanks on it's side and broke the cross line between the tanks. 1 tank remained upright. The fire department pumped the flood water and the oil was collected through a series of limiting booms and pad collection from the ramp area of the below grade occupancy area by HAZMAT personnel. Initial reports from the Latrobe fire chief indicated that he believed approximately 300 gallons had spilled. A technician donned protective gear and entered the area to shut the valves on the tanks and also secure the fill flap tube on the overturned tank. The HAZMAT team was on scene 3 hours and 7 minutes. The scene was turned over to the fire department and homeowner for further remediation.