Ordinance No. 19593 - Laserfiche WebLink

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sting the hazards of a material. 3. Amount and Concentration of the Material. The amount of mater- ial present and its concentration must be considered along with physical and chemical properties to determine the magnitude of the hazard. Hydro- gen peroxide far example, is used as an antiseptic and a hair bleach in low concentrations approximately S% in water solution}. Over 8% hydro- gen peroxide is classed as an oxidizer and is toxic. Above 90% it is a Class 4 oxidizer "that can undergo an explosive reaction when catalyzed or exposed to heat, shock or friction," a definition which incidentally also places hydrogen peroxide over 90% concentration in the Unstable Reactive} category. Small amounts at high concentrations may present a greater hazard than large amounts at low concentrations. 4, Actual Use, Acti vi t or Process ~nvol vi n the Materi a1. The definitions of handling, storage and use in closed systems refer to materials in packages or containers. Dispensing and use in open con- tainers or systems describe situations where a material is exposed to ambient conditions, or vapors are liberated to the atmosphere. Dispen- sing and use in open systems then, are generally more hazardous situ- ations than handling, storage or use in closed systems. The actual use or process may include heating, electric or other sparks, catalytic or reactive materials and many other factors which could affect the hazard and must therefore be thoroughly analyzed, 5. Surroundin Conditions. Conditions such as other materials or processes in the area, type of construction of the structure, fire pro- tection features ~e.g; fire walls, sprinkler systems, a1 arms, etc.}, occupancy fuse} of ad~o~n~ng areas, normal temperatures, exposure to weather, etc. must be taken into account in evaluating the hazard. B. Evaluation uestions. ~. What is the materials}? Correct identification is important, exact spelling is vital. Check labels, MSDS, ask responsible persons, etc. ~. What is the concentration and strength? 3. What is the physical form of the material? Liquids, gases and finely divided solids have differing requirements for spill/leak con- trol, containment. 4. How much material is present? Consider in relation to permit amounts, exempt amounts from Group H Occupancy requirements}, amounts which require detached storage and overall magnitude of the hazard. 5. What other materials including furniture, equipment and build- ing components} are close enough to interact with the material? 6. What are the likely reactions? 1. What is the activity involving the materials? Ordinance - 94