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Where required by Table 5005.2.1.4, buildings, rooms or areas where hazardous material liquids are dispensed or used in open systems shall be provided with secondary containment in accordance with Section 5004.2.2 where the capacity of an individual vessel or system or the capacity of multiple vessels or systems exceeds the following:
  1. Individual vessel or system: greater than 1.3 gallons (5 L).
  2. Multiple vessels or systems: greater than 5.3 gallons (20 L).
REQUIRED SECONDARY CONTAINMENT—HAZARDOUS MATERIAL LIQUIDS USE
MATERIAL INDOOR LIQUIDS USE OUTDOOR LIQUIDS USE
1. Physical-hazard materials
Combustible liquids Class II See Chapter 57 See Chapter 57
Class IIIA See Chapter 57 See Chapter 57
Class IIIB See Chapter 57 See Chapter 57
Cryogenic fluids See Chapter 55 See Chapter 55
Explosives See Chapter 56 See Chapter 56
Flammable liquids Class IA See Chapter 57 See Chapter 57
Class IB See Chapter 57 See Chapter 57
Class IC See Chapter 57 See Chapter 57
Flammable solids Not Applicable Not Applicable
Organic peroxides Unclassified Detonable Required Required
Class I Required Required
Class II
Class III
Class IV
Class V Not Required Not Required
Oxidizers Class 4 Required Required
Class 3
Class 2
Class 1
Pyrophorics Required Required
Unstable (reactives) Class 4 Required Required
Class 3
Class 2
Class 1 Not Required Required
Water reactives Class 3 Required Required
Class 2
Class 1 Not Required Required
2. Health-hazard materials
Corrosives Required Required
Highly toxics
Toxics

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