Question: Two 20 m UST and one 15 m UST were removed from a site at a gas station. The excavation resulted in in a

Two 20 m UST and one 15 m UST were removed from

Two 20 m UST and one 15 m UST were removed from a site at a gas station. The excavation resulted in in a tank pit of 15m x 7.5 m x 6 m. The in-situ bulk density (before excavation) is 1.8 g/cm. After excavation, the excavated soil was stockpiled on-site, and there representative samples were taken from the pile. The analysis of the samples showed TPH concentrations of 80, 1800 and 2200 ppm. a) estimate mass and volume of the excavated soil. b) Estimate the total mass of TPH in the pile (kg). c) Estimate the volume of TPH in the pile assuming the TPH has a density of 0.8 g/cm.

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