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WAC 296-307-41007

When must LP-gas be odorized?

You must ensure that all LP-gas is odorized by an approved agent to indicate by distinct odor, the presence of gas down to concentration in air of a maximum of 1/5 the lower limit of flammability.
Exception:
Odorization is not required if it will create a hazard in further processing, or if it serves no useful purpose as a warning agent.
Note:
The odorization requirement may be met by using 1.0 pounds of ethyl mercaptan, 1.0 pounds of thiophene, or 1.4 pounds of amyl mercaptan per ten thousand gallons of LP-gas. You may use any odorant and quantity that meets the requirements of this section.
[WSR 97-09-013, recodified as § 296-307-41007, filed 4/7/97, effective 4/7/97. Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. WSR 96-22-048, § 296-306A-41007, filed 10/31/96, effective 12/1/96.]
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