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Quantity Limits

The BP Naperville Campus ( BPNC ) is subject to various regulations and their applicable requirements. The Occupational Safety and Health Act (OSHA), the National Fire Protection Association (NFPA) and the International Code Council (ICC) all regulate the storage and use of flammable materials. The general exempt quantity limits established in this section are based on these requirements. Approvals to exceed these general requirements may be petitioned from the code official. These requirements apply to the laboratory, office, and process buildings which are rated as Business use. The limits do not apply to the liquid storage warehouse (811), special inside storage rooms, outside cold storage buildings and buildings rated for high hazard (307, 702).

Responsibilities - The BUs will assure that the amount of chemicals stored in control areas will be maintained at the lowest level which will permit efficient operations. To maintain this condition, it is essential to utilize timely deliveries from designated bulk storage areas and chemical suppliers. Each BU is responsible for conducting routine inspections to assure the quantity limit requirements are met for each control area they occupy. When a control area is shared by multiple BU's, the BU occupying the most floor space must take the lead on assuring compliance with the quantity limits.

The Site Architect will assure the integrity of control areas are maintained. A control area is an area isolated from adjacent areas by fire separation (rated fire door, fire wall, etc.). Generally, the control areas in Naperville are entire floors or sections of a building. In rare instances, there are fire doors or inside storage rooms on a given floor that may increase the number of control areas.

Consult the Site Architect or HSSE with any questions about control areas.

1. Compressed Gas Cylinders Limits

Below are the regulatory quantity limits for compressed gas cylinders in each control area. Flammable compressed gas is defined as a gas with an LEL < 13% or a range > 12 % between the LEL and UEL, regardless of the LEL. The maximum amounts are:

1. 1000 cubic feet of flammable gas
2. 30 gallons of a liquified flammable gas
3. 1500 cubic feet of oxidizer gas
4. 150 lbs (one cylinder) of anhydrous ammonia

    • These quantities are doubled if storage is within approved cabinets, gas cabinets, fume hoods.
    • These quantities are doubled if storage is within buildings equipped throughout with an automatic sprinkler system.
    • If both of these conditions are met, these increases can be applied accumulatively.
  • No flammable gas cylinder storage is allowed in the service corridors.
  • One reserve cylinder is permitted to be stored next to an "in use" cylinder but it must be included in the count.
  • All other cylinders not "in use" need to be stored outside.
  • Cylinders in storage or in a manifold are all included in the maximum amount.

The quantity restrictions above are from the ICC code.
There are other restrictions for compressed gas supply systems detailed in NFPA 45, 50A and 55 that need to be reviewed as the final design proceeds.

Nominal volumes (cubic feet) of hydrogen gas cylinders are B=200, C=72 and D-1=33.
Nominal weight of contents (lbs) of liquified n-Butane are LP5=24 and LP2.5=12.

2. Flammable and Combustible Liquids Limits

In General, the Laboratory Buildings are classified as BUSINESS occupancy and the Process Buildings (307 & 702) are classified as H2 High Hazard.  A control area is an area isolated from adjacent rooms by fire separation ( rated door, fire wall, etc.).

Maximum Exempt Quantities (gallons) of Flammable and
Combustible Liquids for Storage per Control Area
Flammable / Combustible Liquid ClassFirst Floor Control AreaSecond Floor Control AreaThird Floor Control Area
Class IA302315
Class IB604530
Class IC906845
Class I (combined)1209060
Class II1209060
Class IIIA330247165

  • Storage of F & C Liquids is not generally permissible on floors below grade.
  • These quantities are doubled if storage is within approved cabinets or safety containers. See 2. B. 1. a&d.
  • These quantities are doubled in buildings equipped throughout with an automatic sprinkler system.
  • High Hazard Buildings (307, 702, 811) are not limited to the quantities in the table above.
Definitions
Flammable Liquids: Any liquids having a flash point below 100 degrees F. (38 degrees C.) and having a vapor pressure not exceeding 40 psia (276 kPa) at 100 degrees F. (38 degrees C.). Flammable liquids shall be known as Class I liquids and shall be divided into the following classifications:
Class IA. Liquids having flash point below 73 degrees F. (23 degrees C.) and having a boiling point below 100 degrees F. (38 degrees C.)
Class IB. Liquids having flash point below 73 degrees F. (23 degrees C.) and having a boiling point at or above 100 degrees F. (38 degrees C.)
Class IC. Liquids having flash points at or above 73 degrees F. (23 degrees C.) and below 100 degrees F. (38 degrees C.).

Combustible Liquids: Any liquids having a flash point at or above 100 degrees F. (38 degrees C.) shall be known as Class II or III liquids. Combustible liquids shall be divided into the following classifications:
Class II. Liquids having flash points at or above 100 degrees F. (38 degrees C.) and below 140 degrees F. (60 degrees C.)
Class IIIA. Liquids having flash points at or above 140 degrees F. (60 degrees C.) and below 200 degrees F. (93 degrees C.)
Class IIIB. Liquids having flash points at or above 200 degrees F. (93 degrees C.)

3. Flammable Solid Limits

Maximum Exempt Quantities (pounds) of Flammable
Solids for Storage per Control Area
ConditionExempt Quantities (pounds
Inside Storage 
Unprotected by sprinklers or cabinets125
Within cabinets in unsprinklered structure250
In sprinklered structure, not in cabinet250
In sprinklered structure, within cabinet500
Outside Storage250

Flammable solid: A flammable solid is a solid, except a blasting agent or explosive, capable of causing fire through friction, absorption of moisture, spontaneous chemical change, or retained heat from manufacturing or processing; which has an ignition temperature below 212 degrees F. (100 degrees C.); or which burns so vigorously and persistently when ignited as to create a serious hazard.

4. Container Size Limits 

NFPA and 1910.106 (d)

Maximum allowable Container Size for each Class of Flammable and Combustible Liquid
(units in gallons unless specified)

Container Type IAIBICIIIII
Glass1 pt1 qt115
Metal (Non-DOT) or Approved Plastic15555
Safety Cans25555
Metal DOT Drum6060606060
Approved Metal Tank and IBCs660660660660660
Rigid Plastic or Composite IBCsNPNPNP660660
Polyethylene - DOT15606060
 Fibre DrumNPNPNP6060
NP = Not Permitted

* Glass containers as large as one gallon may be used if the required purity would be adversely affected by storage in a metal or an approved plastic container, or if the liquid would cause excessive corrosion or degradation of a metal or approved plastic container.



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