PACIFIC GAS & ELECTRIC CO — Integrity Assurance Notification

Current as of 2021-10-05 Government source

Pipeline and Hazardous Materials Safety AdministrationOfficial agency material

REASSESSMENT INTERVAL ABOVE 30% SMYSPacific Gas and Electric Company (PG&E) is respectfully requesting an extension of the reassessment interval for PG&E Gas Transmission Line 105B for an additional six (6) months pursuant to General Order 112F §101.3 and 49 CFR Section 192.939(a).Under §192.939(a), PG&E is required to conduct a reassessment of a covered segment of Line 105B by December 31st, 2021; however under §192.939(a), PG&E may seek an extension of the reassessment interval if it demonstrates sufficient justification of the need for the extension.If required to meet the current December 31, 2021 reassessment due date, PG&E has concerns with maintaining product supply to 256,000 residential and commercial customers (including multiple refineries and powerplants) throughout Contra Costa County. There are three (3) In-Line Inspections (ILI) planned between August and the end of the 2021 calendar year that include the parallel line (SP3). Should either of the two (2) runs taking place on the parallel line SP3 identify any ‘immediate’ anomalies requiring a reduction in pressure, it would result in PG&E not being able to perform the assessment of Line 105B due to not being able to achieve adequate gas velocities. Additionally, if the ILI run on Line 105B were to be scheduled prior to receiving data from the parallel runs it would have the potential to require pressure reductions on both lines resulting in PG&E not being able to meet the minimum pressure requirements of customers.For these reasons, PG&E seeks a six (6) month extension to the reassessment due date of December 31, 2021. The request for extension is only applicable to Line 105B MP 0.00 to 11.81 for the threat of external corrosion. PG&E is committed to completing the integrity assessment on Line 105B as soon as possible, but no later than June 30th, 2022.Anticipated impact, risk, and mitigation were all considered in our decision to request this reassessment extension and are detailed as follows.#