Regulationhistorical
49 CFR 193.2169
Gas leak detection.
Current as of 1999-10-01 Government source
Pipeline and Hazardous Materials Safety AdministrationOfficial agency material
View source Appropriate areas within an impounding system where collection or passage of LNG or LNG vapor could be expected must be equipped with sensing and warning devices to monitor continuously for the presence of LNG or LNG vapor and to warn before LNG gas concentration levels exceed 25 percent of the lower flammable limit.