(1) Pursuant to M.G.L. c. 164, § 148, each Gas Company shall require the stamp of a Professional Engineer with Sufficient Knowledge who is the engineer of record on any Instruments of Service for engineering work or services that could pose a material risk to public safety, as determined by the Department pursuant to G.L. c. 112, § 81R clause (l).
(2) The Professional Engineer’s review and use of their Professional Engineer’s stamp must comply with the professional and ethical obligations set forth in 250 CMR 5.00: Professional Practice.
(3) Each Gas Company shall maintain the Instruments of Service that bear a Professional Engineer’s stamp pursuant to 220 CMR 105.00 and supporting documentation. These Instruments of Service and supporting documentation shall be readily accessible upon request by the Department and shall be maintained for the useful life of the pipe, as that term is used in 49 CFR Part 192, and for at least five years after the date of abandonment.