1. Hazardous Materials Subpart H

2. Subpart H Standards 1910.101 Compressed Gases 1910.102Acetylene 1910.103Hydrogen 1910.104Oxygen 1910.105Nitrous Oxide 1910.106Flammable and Combustible Liquids

3. Subpart H Standards 1910.107Spray Finishing using Flammable and Combustible Materials 1910.108Dip Tanks containing Flammable and Combustible Liquids 1910.109Explosives and Blasting Agents

4. Subpart H Standards 1910.110Storage and Handling of Liquefied Petroleum Gases 1910.111Storage and Handling of Anhydrous Ammonia 1910.119Process Safety Management of Highly Hazardous Chemicals 1910.120Hazardous Waste Operations and Emergency Response

5. Subpart H Standards 1910.123Dipping and coating operations: Coverage and Definitions 1910.124 General Requirements for Dipping and Coating Operations

6. Subpart H Standards 1910.125 Additional Requirements for Dipping and Coating Operations that use Flammable or Combustible Liquids 1910.126 Additional Requirements for Special Dipping and Coating Operations

7. Definitions Hazardous Chemical Occupational Safety & Health Act (OSHA) term that denotes any chemical that would be a risk to employees if exposed in the work place

8. Definition Highly Hazardous Chemical OSHA term that denotes any chemical that would posses toxic, reactive, flammable or explosive properties

9. Definitions Aerosol Aerosol shall mean a material which is dispensed from its container as a mist, spray, or foam by a propellant under pressure

10. Definitions Container Container shall mean any can, barrel, or drum

11. Definitions Closed Container Closed container shall mean a container so sealed by means of a lid or other device that neither liquid or vapor will escape from it at ordinary temperatures

12. Definitions Fire Area Fire area shall mean an area of a building separated from the remainder of the building by construction having a fire resistance of at least 1 hour and having all communicating openings properly protected by an assembly having a fire resistance rating of at least one hour.

13. Definitions Flash Point Flash point means the minimum temperature at which a liquid gives off vapor within a test vessel in sufficient concentration to form an ignitable mixture with air near the surface of the liquid. The flash point is normally an indication of susceptibility to ignition.

14. Definitions Combustible Liquid Combustible liquid means any liquid having a flash point at above 100°F (37.8 °C). Combustible liquids are divided into two classes: –Class II –Class III

15. Definitions Flammable Liquid Flammable liquid means any liquid having a flash point below 100 °F (37.8 °C) or higher, the total of which make up 99 percent or more of the total volume of the mixture.

16. Definitions Portable Tank Portable tank shall mean a closed container having a liquid capacity over 60 U.S. gallons and not intended for fixed installation

17. Definitions Safety Can Safety can means an approved container, of not more than 5 gallons capacity, having a spring- closing lid and spout cover and so designed that it will safely relieve internal pressure when subject to fire exposure

18. Flammable (Explosive) Limits Flammable Range The range of a combustible vapor or gas-air mixture between the upper and lower flammable limits. Also, known as the “explosive range.”

19. Flammable (Explosive) Limits Lower Flammable Limit The lowest concentration at which a combustible gas forms a flammable mixture. Below the LFL there is too little combustible fuel to sustain a flame. Also, known as “Lower Explosive Limit or LEL.”

20. Flammable (Explosive) Limits Upper Flammable Limit The highest concentration at which a combustible gas forms a flammable mixture. Above the UFL there is too little oxygen to sustain a flame. Better known as “too rich” to burn. Also, known as “Upper Explosive Limit or UEL.”

21. Flammable (Explosive) Limits Hazardous MaterialLFLUFL Butane1.9 8.5 Ethylene Oxide3.0 100.0 Gasoline1.4 7.6 Hydrogen4.0 75.0 Isopropyl Alcohol2.0 12.7 Propane2.1 9.5

22. Container and Portable Tank Storage This section applies only to the storage of flammable and combustible liquids in drums or other containers not exceeding 60 gallons individual capacity and portable tanks of less than 660 gallons individual capacity.

23. Fire Control At least one portable fire extinguisher having a rating of not less than 12-B units shall be located outside of, but not more than 10 feet from, the door opening into any room used for storage.