NAC590.740. Testing and inspection of storage tanks.

     1. Except as otherwise provided in this section, each operator of a registered storage tank shall perform or cause to be performed a test of the storage tank for tightness in accordance with the provisions of NAC 459.994 and the schedule contained in 40 C.F.R. § 280.40(c).

     2. The operator of a registered storage tank that is above ground shall perform or cause to be performed an inspection of the storage tank at least once each month. The monthly inspection must include, without limitation:

     (a) Visual inspection of the aboveground storage tank system to identify cracks or other defects in the secondary containment area and product transfer area;

     (b) Visual inspection of the exterior surfaces of the tanks, piping, valves, pumps and other equipment for cracks, corrosion, releases and maintenance deficiencies and to identify malfunctioning equipment, needed maintenance and needed revisions to current operating practices;

     (c) Visual inspection of the elevated tanks or tanks on concrete slabs; and

     (d) Unless the secondary containment of the tank has a sound concrete floor or liner:

          (1) Visual inspection of the area between the outer shell of the tank or the floor of the tank and the containment area; or

          (2) Vapor monitoring of the soil directly beneath the tank bottom or perimeter and the water table.

     3. A registered portable storage tank must be inspected visually by the operator immediately before and after the portable storage tank is relocated.

     4. A marina storage tank must be tested and inspected in accordance with the provisions of NAC 459.9938.

     5. The operator of a registered storage tank shall maintain a record of each inspection conducted pursuant to this section on a form approved by the Division for at least 3 years after the date of the inspection.

     (Added to NAC by Bd. to Review Claims, eff. 6-15-90; A 12-23-91; 1-22-96; A by Div. of Environmental Protec. by R226-05, 5-4-2006)