Part 27. PART 27—METHANE-MONITORING SYSTEMS

• SUBPART A [§ 27.1 - § 27.12] - Subpart A—General Provisions
• SUBPART B [§ 27.20 - § 27.24] - Subpart B—Construction and Design Requirements
• SUBPART C [§ 27.30 - § 27.41] - Subpart C—Test Requirements