The following definitions shall apply in the interpretation and the enforcement of this chapter:

    1. "Nonflammable liquid" means and includes any liquid which has a flash point above two hundred degrees Fahrenheit as determined in accordance with the standard method of tests for flash points used by the American Society of Testing Materials Standards.

    2. "Atmospheric tank" means and includes a storage tank which has been designed to operate at pressures from atmospheric through 0.5 psig. but shall not include portable containers or tanks with a maximum capacity of less than one thousand gallons.  (Ord. S-6689, 1966).