29 CFR 1910.106: Flammable liquids
The official text is on the eCFR. This page maps how the section is organized, quotes the paragraphs our ASP practice questions are built on, and gives free questions you can try. Text below is quoted from the eCFR, current as of 2026-10-14; the section was last amended 2018-06-29.
How 29 CFR 1910.106 is organized
- (a) Definitions48 paragraphs
- (b)179 paragraphs
- (c) Piping, valves, and fittings—(1) General—(i) Design15 paragraphs
- (d) Container and portable tank storage—(1) Scope—(i) General61 paragraphs
- (e) Industrial plants—(1) Scope—(i) Application43 paragraphs
- (f)50 paragraphs
- (g)95 paragraphs
- (h) Processing plants—(1) Scope46 paragraphs
- (i)8 paragraphs
- (j) Scope11 paragraphs
Paragraphs our practice questions cite most
Counted across the 9 live PassCited questions built on this section. This reflects our question bank, not the real exam.
“(iii) Spill containment. The storage area shall be graded in a manner to divert possible spills away from buildings or other exposures or shall be surrounded by a curb at least 6 inches high. When curbs are used, provisions shall be made for draining of accumulations of ground or rain water or spills of flammable liquids. Drains shall terminate at a safe location and shall be accessible to operation under fire conditions.”
“(31) Ventilation as specified in this section is for the prevention of fire and explosion. It is considered adequate if it is sufficient to prevent accumulation of significant quantities of vapor-air mixtures in concentration over one-fourth of the lower flammable limit.”
“(b) Tanks may be built of materials other than steel for installation underground or if required by the properties of the liquid stored. Tanks located above ground or inside buildings shall be of noncombustible construction.”
“(f) Special engineering consideration shall be required if the specific gravity of the liquid to be stored exceeds that of water or if the tanks are designed to contain flammable liquids at a liquid temperature below 0 °F.”
“(e) When tanks are compacted in three or more rows or in an irregular pattern, greater spacing or other means shall be provided so that inside tanks are accessible for firefighting purposes.”
Free practice questions on 29 CFR 1910.106
Question 1
A site is adding a remote pumping system for gasoline (a Category 1 flammable liquid) to feed three dispensing units. During a pre-startup review, the safety professional checks the control arrangement. The electrician reports that the pump is wired to a single key switch in the station office. Once the attendant turns the key, the pump runs continuously and supplies all dispensers until the key is turned off at the end of the shift. Impact valves with fusible links are installed at the base of each dispenser. What is the required corrective action?
Show answer and source
Answer: B. Replace the key switch with a control that lets the pump run only when a nozzle is removed from its bracket and the dispenser switch is manually actuated, and that stops the pump when all nozzles are returned.
The standard requires a control that lets the pump operate only when a nozzle is removed from its bracket and the dispenser switch is manually actuated, and that stops it when all nozzles are back. Impact valves are a separate, additional requirement and do not replace this control; a timer or a relocated pump does not meet it either.
Answer B rests on
29 CFR 1910.106(g)(3)(v)(d)(opens ecfr.gov in a new tab)“A control shall be provided that will permit the pump to operate only when a dispensing nozzle is removed from its bracket on the dispensing unit and the switch on this dispensing unit is manually actuated. This control shall also stop the pump when all nozzles have been returned to their brackets.”
Question 2
A facility keeps flammable liquid drums on an outdoor pad next to its warehouse. The pad is surrounded by a 6-inch curb with no outlet. After storms, rainwater stands inside the curb and the drums sit in it. The safety manager must fix this without weakening spill protection. Which corrective action fits the standard?
Show answer and source
Answer: C. Install a drain from the curbed area that ends at a safe location away from the building and can be operated from a protected spot during a fire
When curbs are used, the standard requires provision for draining rain water and spills. The drains must end at a safe location and be operable under fire conditions. A drain that meets both conditions fixes the ponding. Opening the curb toward the warehouse defeats spill containment, and routing to an interior drain or relying on after-the-fact pumping does not give a safe, fire-accessible drain.
Answer C rests on
29 CFR 1910.106(d)(6)(iii)(opens ecfr.gov in a new tab)“When curbs are used, provisions shall be made for draining of accumulations of ground or rain water or spills of flammable liquids. Drains shall terminate at a safe location and shall be accessible to operation under fire conditions.”
Where it shows up in exam prep
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Other Part 1910 sections
- 29 CFR 1910.1020: Access to employee exposure and medical records
- 29 CFR 1910.1030: Bloodborne pathogens
- 29 CFR 1910.1053: Respirable crystalline silica
- 29 CFR 1910.119: Process safety management of highly hazardous chemicals
- 29 CFR 1910.120: Hazardous waste operations and emergency response
- 29 CFR 1910.1200: Hazard communication
This is a study aid, not legal advice or an official interpretation. Always check the current eCFR text. Original practice questions, not real exam items. PassCited is not affiliated with or endorsed by BCSP.