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CRadNet Is HAZARDOUS MATERIALS BUSINESS PLAN MRI Manual / Regulatory Affairs Original Effective Date: April 28, 2021 • Never tip, slide or roll liquid containers on their side. Keep liquid helium containers vertical at all times. • Avoid mechanical or thermal shock. Always move liquid helium containers by pushing, not pulling. • Check the system regularly for frost accumulation. If restrictions resulting from freezing moisture or air, or foreign material is present in openings or vents, immediately contact the GE service engineer. • Provide protection for liquid helium containers against extremes of weather. This is important where outside storage areas are used, however; RadNet does not store helium tanks outside. Personal Protective Equipment(PPE) Employees and equipment vendors must be thoroughly familiar with the properties and safety considerations before working near or handling a cryogenic liquid and its associated equipment. The eyes are the most sensitive body part to the extreme cold of the liquid and vapors of cryogenic liquids. The recommended personal protective equipment for handling cryogens includes a full face shield over safety glasses, loose-fitting thermal insulated or leather gloves, long sleeve shirts, and trousers without cuffs. In addition, safety shoes are recommended for people involved in the handling of containers. Depending on the application, special clothing suitable for that application may be advisable. A special note on insulated gloves: Gloves should be loose-fitting so they are able to be quickly removed if cryogenic liquid is spilled on them. Insulated gloves are not made to permit the hands to be put into a cryogenic liquid. They will only provide short-term protection from accidental contact with the liquid. In emergency situations, self-contained breathing apparatus (SCBA) may be required. Physical Properties of Helium • Molecular Symbol: He • Molecular Weight: 4.003 • Boiling Point @ 1 atm: -452.1 OF • Freezing Point @ 367 psia: -459.7°F • Critical Temperature: -450.3°F • Critical Pressure 33.0 psia • Density, Liquid @ B.P., 1 atm: 7.798 Ib./cu ft • Density, Gas @ 32°F, 1 atm: 0.0103 Ib./cu ft • Specific Gravity, Gas (Air = 1) @ 32°F, 1 atm: 0.138 • Specific Gravity, Liquid @ B.P., 1 atm: 0.125 • Specific Volume @ 32°F, 1 atm: 89.77 Cu ft/ Ib • Specific Volume @ 68°F, 1 atm: 96.67 cu ft/ Ib • Latent Heat of Vaporization: 34.9 Btu/Ib. mole • Expansion Ratio, Liquid to Gas, B.P. to 32°F: 1 to 754 Liquid Helium Liquid helium is most frequently provided to customers in a liquid container. • The image below depicts a typical liquid container design. • The liquid container consists of two cylindrical vessels, one within the other. 4