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The maximum quantities of hazardous materials stored or used in a single fabrication area shall not exceed the quantities set forth in Table 2704.2.2.1.
TABLE 2704.2.2.1
QUANTITY LIMITS FOR HAZARDOUS MATERIALS IN A SINGLE FABRICATION AREA IN GROUP H-5a
HAZARD CATEGORY SOLIDS
(pounds per square foot)
LIQUIDS
(gallons per square foot)
GAS
(cubic feet @ NTP per square foot)
Physical-Hazard Materials
Combustible dust Note b Not Applicable Not Applicable
Combustible fiber   Not Applicable Not Applicable
Loose
Note b
Baled
Notes b and c
Combustible liquid Not Applicable   Not Applicable
Class II
0.01
Class IIIA
0.02
Class IIIB
Not Limited
Combination Class I, II and IIIA
0.04
Cryogenic gas Not Applicable Not Applicable  
Flammable
Note d
Oxidizing
1.25
Explosives Note b Note b Note b
Flammable gas Not Applicable Not Applicable  
Gaseous
Note d
Liquefied
Note d
Flammable liquid Not Applicable   Not Applicable
Class IA
0.0025
Class IB
0.025
Class IC
0.025
Combination Class IA, IB and IC
0.025
Combination Class I, II and IIIA
0.04
Flammable solid 0.001 Not Applicable Not Applicable
Organic peroxide   Not Applicable Not Applicable
Note b
Class I
Note b
Class II
0.025
Class III
0.1
Class IV
Not Limited
Class V
Not Limited
Oxidizing gas Not Applicable Not Applicable  
Gaseous
1.25
Liquefied
1.25
Combination of gaseous and liquefied
1.25
Oxidizer     Not Applicable
Class 4
Note b
Note b
Class 3
0.003
0.03
Class 2
0.003
0.03
Class 1
0.003
0.03
Combination Class 1, 2, 3
0.003
0.03
Pyrophoric materials 0.01 0.00125 Notes d and e
Unstable (reactive)      
Class 4
Note b
Note b
Note b
Class 3
0.025
0.0025
Note b
Class 2
0.1
0.01
Note b
Class 1
Not Limited
Not Limited
Not Limited
Water reactive     Not Applicable
Class 3
0.01f
0.00125
Class 2
0.25
0.025
Class 1
Not Limited
Not Limited
Health-Hazard Materials
Corrosives Not Limited Not Limited Not Limited
Highly toxic Not Limited Not Limited Note d
Toxics Not Limited Not Limited Note d
For SI: 1 pound = 0.454 kg, 1 pound per square foot = 4.882 kg/m2, 1 gallon per square foot = 40.7 L/m2, 1 cubic foot @ NTP/square foot = 0.305 m3 @ NTP/m2, 1 cubic foot = 0.02832 m3.
  1. Hazardous materials within piping shall not be included in the calculated quantities.
  2. Quantity of hazardous materials in a single fabrication area shall not exceed the maximum allowable quantities per control area in Tables 5003.1.1(1) and 5003.1.1(2).
  3. Densely packed baled cotton that complies with the packing requirements of ISO 8115 shall not be included in this material class.
  4. The aggregate quantity of flammable, pyrophoric, toxic and highly toxic gases shall not exceed the greater of 0.2 cubic feet at NTP/square foot or 9,000 cubic feet at NTP.
  5. The aggregate quantity of pyrophoric gases in the building shall not exceed the amounts set forth in Table 5003.8.2.
  6. Quantity of Class 3 water-reactive solids in a single tool shall not exceed 1 pound.

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