Small Natural Gas Operator OQ Guide - January 2017 (PDF)
This guidance material was implemented under the sponsorship of the U.S. Department of Transportation. The material relies on sources representing the best opinion on the subject at the time of publication. However, it should not be assumed that all acceptable safety measures and procedures are mentioned in this manual. The reader is referred to the Code of Federal Regulations (49 CFR Parts 190-199, Part 40 and also NFPA 58 & 59) for the complete pipeline safety requirement.