Section 5503 - Bulk Oxygen Storage Containers(a) Foundation and Supports. Permanently installed containers shall be provided with substantial noncombustible supports on firm noncombustible foundations.(b) Liquid oxygen containers shall comply with (b)(1) or (b)(2). (1) Be fabricated from materials meeting the impact test requirements of Paragraph UG-84 of the ASME Boiler and Pressure Vessel Code, Section VIII--Unfired Pressure Vessels (1974). Containers operating at pressures above 15 psig shall be designed, constructed and tested in accordance with appropriate requirements of the ASME Boiler and Pressure Vessel Code, Section VIII--Unfired Pressure Vessels (1974). Insulation surrounding the liquid oxygen container shall be noncombustible.(2) Be designed, constructed, tested and maintained in accordance with U. S. Department of Transportation (DOT) Specifications and Regulations for 4L containers.(c) High pressure gaseous oxygen containers shall comply with (c)(1) or (c)(2).(1) Be designed, constructed and tested in accordance with appropriate requirements of the ASME Boiler and Pressure Vessel Code, Section VIII--Unfired Pressure Vessels (1974).(2) Be designed, constructed, tested and maintained in accordance with U. S. Department of Transportation (DOT) Specifications and Regulations.Cal. Code Regs. Tit. 8, § 5503