FIELD DOCUMENTS - Laserfiche WebLink

Home Browse Search

Site Assessment Report September 24, 1997 three fuel dispensers each, two diesel and one unleaded. Three underground tanks that appear to be 10,000 gallons each support the facility. The property owner reports that these tanks were replaced in 1986 with state-of-the-art tanks to include double wall containment and alarm sensors. On the east edge, running parallel to the islands, is a commercial truck scale which was constructed in 1946. This scale is approximately 80% covered by the overhead canopy and is 11 feet wide by 70 feet long (see photo 6). Limited inspection of the scale showed that it is constructed within a concrete retaining vault at a depth of 4 feet (see photo 7). Adjacent to the scale is the scale house that is partially cover by the overhead canopy. The scale appeared to be in working order; however, it was not in operation during Amherst's inspection. From Amherst's visual inspection, the majority of the surface contamination noted was diesel and was concentrated around pump island #2. The concrete decking in the area surrounding both islands is severely cracked and in one area, adjacent to pump island #2, the slab was broken and subsided on one side (see photo 8 and 9). Visual inspection of the cracks in the area of island #2 showed that, in many cases, the cracks have expanded to a point that, once the debris and surface dirt are removed, the underlying soils maybe exposed. At no time during the inspection did Amherst observe the reported traffic-generated hydraulic effect of free diesel from beneath the concrete. The drawing enclosed shows the areas of diesel staining on the concrete apron in and around the fueling islands. A large area around the north end of island #2 appears to have had greater surface staining given the residual fuel left in the cracks and expansion joints in the concrete apron. This area may have been the location of the spill that prompted the call to the Health Department. One primary area of concern was noted during this inspection. A portion of the concrete apron has subsided (see photo 9 and drawing) in the reported spill area and subsurface soils beneath the concrete are most likely impacted with diesel due to the spill. 3