Oil Tank Previously Abandoned with Sand
Any future real estate transaction will most likely require documentation that the tank has not leaked. Accordingly, I have developed a scope to remove the tank. If the tank was properly cleaned (i.e., devoid of all residual oil and this was an empty metallic shell) and then filled with sand, then the sand will be removed and reinstalled to fill the void space of the tank. If in the event that the tank was not cleaned of all oil and then subsequently filled with sand, then the sand in the tank is likely impacted with oil and will need to be placed into drums and properly disposed off at an off site facility.
- Upon arrival on the site and after completion of a tailgate safety meeting, Curren will uncover the tank by excavating all overburden soils necessary to uncover the Underground Storage Tank (UST).
- The soils in the tank will be removed and staged adjacent to the excavation. If these soils are clean, they will be reused later to fill the void space of the tank.
- After removal of soils inside the tank, it will then be removed from the excavation. Curren will notify the township for inspection of the tank and associated excavation.
One site assessment soil samples is suggested to be obtained from below the tank invert. The soil sample obtained from the tank excavation will be submitted to an independent NJDEP certified laboratory for EPH (Extractable Petroleum Hydrocarbons) analysis. EPH analysis is the NJDEP’s initial screening parameter for number two heating oil in soil
The top of the tank, which was present at an approximate depth of 3’ below grade surface (b.g.s.) was exposed and a hole was found to have been previously cut into the tank. The tank was found to be filled with sand and water. A hand auger was utilized to advance a boring into the tank to assess if the soils in the tank could be utilized for clean fill. Petroleum odors and staining were noted in the soils in the tank. Accordingly, Curren personnel placed the oil impacted sand from inside the tank into 55 gallon drums. A total of five 55 gallon drums were utilized to containerize the petroleum impacted soil from the tank. After tank cleaning the remaining portion of the tank was exposed to allow tank removal.
Upon removal of the tank, the UST was thoroughly inspected aboveground for any evidence of corrosion holes or breaches. Multiple corrosion holes were apparent throughout the tank. Soil staining, indicative of petroleum contamination was also noted within the tank excavation. Photo documentation of the tank and excavation are included with this report.