Problems/Comments

A 5,000-gallon underground storage tank (UST #4) was removed from this site on November 4, 2011. The UST consisted of three separate compartments, two 2,000-gallon gasoline, and one 1,000-gallon diesel (heating oil). The UST and associated piping were removed from the site. Excavated soils were temporarily stockpiled on site. During the removal activities, groundwater flooded the excavation; and as such, no confirmation soil samples were collected from the base of the excavation. No obvious visual or olfactory signs of contamination were present during the UST removal activities. Six confirmation soil samples, including a duplicate soil sample, were collected from this site; three from the excavation sidewall at the soil/water interface, one from beneath the product supply lines near the dock, and three from the temporary soil stockpile. Following the excavation activities, the temporarily stockpiled soils were replaced in the excavation. Confirmation soil samples were analyzed for diesel range organics (DRO), residual range organics (RRO), benzene, toluene, ethylbenzene, total xylenes (BTEX), and polynuclear aromatic hydrocarbons (PAHs). Benzene was detected at 0.028 mg/Kg in the sample collected from the supply lines near the dock four feet below grade (bg), which exceeds the ADEC cleanup criterion of 0.025 mg/Kg. All other analytes from the other soil samples were not detected above the most stringent ADEC method two cleanup levels.

Action Information

Contaminant Information

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Requirements