PG&E has included a Turlock area gas pipeline on its “Top 100 Segments” list for longer-term evaluation and planning. The factor for this was listed by PG&E as potential for corrosion.
PG&E is now conducting an engineering review of 3,310 feet of pipe between Hwy 33 in Patterson and Hwy 99 in Turlock based on corrosion monitoring data. Three areas around the pipe were dug up to permit physical examinations of the pipe.
“Engineering will continue to monitor these segments, but no further action is warranted at this time,” states a PG&E document.
The Stanislaus County Board of Supervisors were told by a PG&E representative at Tuesday’s Board Meeting that if there is a problem discovered with any of their pipes, whether on the list or not, PG&E will address it immediately and that they have emergency services 24 hours, 7 days a week.
The presentation to the Board also included information on 2 North Modesto area pipelines on the list also.
Local presentations about possible “risky” pipelines come after the deadly San Bruno gas explosion on September 9, 2010.
PG&E has a comprehensive inspection and monitoring program to ensure the safety of its natural gas transmission pipeline system. PG&E monitors system status in real time on a 24-hour basis, and regularly conducts leak inspections, surveys, and patrols of all of our natural gas pipelines. Any issues identified as a threat to public safety are immediately addressed.
PG&E also uses the data it collects to help plan and prioritize future work. One of the tools PG&E uses is a risk management program that inventories each of the 20,000 segments within PG&E’s natural gas transmission pipeline system and evaluates them against criteria such as:
– the potential for third party damage like dig-ins from construction,
– the potential for corrosion,
– the potential for ground movement, and
– the physical design and characteristics of the pipe segment.