(A) Hoses. All unloading hose from the tank truck into underground tanks shall be metallic lined or its equivalent and shall be equipped with a nonferrous nozzle or tight connection metal nipple:
(1) The tank truck shall be electrically grounded by means of its drag chain before unloading operations start and during the entire unloading operation.
(2) If an underground tank is supplied through a permanent pipe connection to an aboveground, general storage tank, filling may be by power driven pump or gravity.
(B) Pumps. Liquids shall be withdrawn from tanks by means of approved pumps, equipped with metallic lined hose and nonferrous discharge nozzle:
(1) No pumps shall be located within a building.
(2) Wiring of electrical pumps and electrical equipment in connection therewith shall conform to the specifications set out in Article 514 of the National Electrical Code, 1959 Edition.
(3) Devices which discharge by gravity shall be so designed that it is impossible to retain in the gauging compartment materially more than ten gallons of liquid, and so that it is not possible to lock the device without draining the liquid.
(4) Systems which employ continuous air pressure on the storage tank in connection with gauging or vending service are prohibited.
(`95 Code, § 119.08) Penalty, see § 10.99