NAC459.9938. Marina storage tanks: Filling equipment; monitoring; testing; daily inventory records.

     1. Except for tanks not exceeding a capacity of 1,100 gallons or tanks not equipped to accept a tight-fill that are instead filled from a delivery nozzle on a delivery vehicle:

     (a) All aboveground marina storage tanks must be filled through a liquid-tight connection enclosed in a grounded fill pipe spill-containment box that is located at least 3 feet above the ground and at least 20 feet away from a body of water and is capable of containing a minimum of 5 gallons.

     (b) All marina storage tanks filled by means of remote piping must have installed in the piping at a point where connection and disconnection is made between the tank and a delivery vehicle either a check valve and shutoff valve with a quick-connect coupling or a check valve with a dry-break coupling. The check valve device must be protected from tampering and physical damage.

     2. Except for double-walled, aboveground marina storage tanks which are exempt from weekly monitoring requirements and except as otherwise provided in subsection 4, aboveground marina storage tanks must be visually inspected weekly for leaks. The results of the weekly visual inspections must be dated and recorded.

     3. Except as otherwise provided in subsection 4, aboveground marina storage tanks must be inspected monthly in accordance with the provisions of subsection 2 of NAC 590.740 and must be inspected for release detection in accordance with 40 C.F.R. § 280.43(a)-(d) and (g).

     4. Weekly and monthly monitoring of an aboveground marina storage tank is not required when a marina is closed during the off-season if the tank contains only a de minimis quantity of fuel.

     5. All underground or underwater piping that is not double-walled with interstitial leak sensors must be tightness-tested for leaks in accordance with the requirements of 40 C.F.R. § 280.41(b).

     6. All electronic and mechanical equipment used for release detection, monitoring or warning must be tested for proper operation and calibration annually or pursuant to the manufacturer’s recommendation, whichever is more frequent.

     7. If, because of the nature of the aboveground marina storage tank or its secondary containment, visual inspections are not adequate for the purpose of determining whether a leak has occurred, an owner or operator of an aboveground storage tank shall keep daily inventory records. Daily inventory records for the most recent 3 years must be kept on the premises or made available for inspection upon 24 hours’ notice. Daily inventory records are not required when a marina is closed during the off-season if the tank contains only a de minimis quantity of fuel.

     (Added to NAC by Environmental Comm’n by R083-05, eff. 10-31-2005)