After a reportable incident, the Division may: Interview personnel; View equipment or pipe; Request issuance of a subpoena for production of equipment or pipe relating to the incident for independent preservation; Order independent laboratory tests of equipment or pipe; View related documents; or Take other investigative measures as needed to complete a comprehensive independent investigation. A gas company or gas master meter operator shall preserve all equipment or piping which may have contributed to an incident until the investigation by the Division has been completed.