PACIFIC GAS & ELECTRIC CO — Integrity Assurance Notification

MAOP RECONFIRMATION METHOD 6Pacific Gas and Electric Company (PG&E) has performed a comprehensive evaluation of all station features at its , Modesto Meter Station ( Woodland Station) to reconfirm Maximum Allowable Operating Pressure (MAOP). This station is in Modesto, California and provides regulated gas to . PG&E’s initial phase of this project identified all traceable, verifiable, and complete (TVC) records to reconfirm MAOP based on design and pressure test records. Fourteen (14) joints at Woodland Station were identified as having non-TVC records of a pressure test in this review. The joints considered in this evaluation are located in a High Consequence Area (HCA) and are located in a Class 3 location. PG&E proposes to establish TVC MAOP records via 49 Code of Federal Regulations (CFR) §192.624(c)(3), Method 3: Engineering Critical Assessment (ECA). At Woodland Station, records were also non-TVC for materials properties of these 14 joints. PG&E utilized nondestructive examination (NDE), satisfying the requirements of §192.607, to verify their materials properties. A combination of NDE to establish material strength, chemical composition, microstructure, wall thickness, and long seam was deployed. Grade and nominal wall thickness were determined using a combination of NDE data and engineering analysis. Charpy V-notch toughness and material fracture toughness were calculated based on vintage and operating temperature.#