Tanks for major chains usually run between 6,000 to 12,000 gallons. For small independent operators tank size typically runs between 1,000 and 3,000 gallons. The pipe costs listed are averages of installed costs per linear foot including contractor's overhead and profit, but excluding any design layout costs or fees. The two pipe sizes listed refer to the interior diameter of the pipe. The sizes and type of pipe listed were found to be the most typical for connecting underground storage tanks to gas pumps.
Most installations are with plastic piping.
The quality of the subject property will indicate the quality of the pipe used. Installations 10 years old or more may have installed black steel or galvanized pipes. In environmentally sensitive areas, secondary containment lines may be required. Excavation and fill is ranked by the difficulty in working with the soil and the site. Depreciate piping with tanks over a 20-yr. life.