Overview
PG&E I-474 L-002 MP 122.14-158 ILI PIGGING (LOCATION H) is a gas pipeline facility in Petaluma, California, operated by Pacific Gas and Electric Company. It supports natural gas transmission through Sonoma County.
PG&E I-474 L-002 MP 122.14-158 ILI PIGGING (LOCATION H) is a natural gas pipeline facility located in Petaluma, California, within Sonoma County. This operational site is part of Pacific Gas and Electric Company's extensive gas transmission network, serving the broader San Francisco Bay Area. The facility is identified by its pipeline segment and pigging location, which is used for inline inspection and maintenance of the pipeline. The facility operates under the regulatory oversight of the Pipeline and Hazardous Materials Safety Administration (PHMSA) and complies with 49 CFR Part 192 for gas pipeline safety. As part of PG&E's system, it is subject to integrity management programs, including regular inline inspections (ILI) to assess pipeline condition and prevent leaks or failures. The pipeline's age and cathodic protection systems are typical considerations for maintaining safety in California's seismically active region. This pigging location plays a critical role in ensuring the reliability and safety of natural gas delivery to residential, commercial, and industrial customers in the area. By enabling routine maintenance and inspection, it helps mitigate risks associated with pipeline corrosion and damage, supporting the region's energy infrastructure and community safety.
Environmental context
The facility is situated in Petaluma, a city in Sonoma County with a mix of urban and agricultural land uses. Proximity to populated areas and waterways, such as the Petaluma River, requires careful monitoring to prevent leaks that could impact public safety and local ecosystems. The region's seismic activity adds additional risk factors for pipeline integrity, necessitating robust inspection and maintenance protocols.
Frequently asked questions
The facility is located in Petaluma, Sonoma County, California, United States, near coordinates 38.243204 N, -122.673284 W.
A pigging location is used to insert and retrieve pipeline inspection gauges (pigs) that clean the pipeline interior or conduct inline inspections to assess pipe wall integrity, detect corrosion, and ensure safe operation.
In the United States, gas pipelines are regulated by the Pipeline and Hazardous Materials Safety Administration (PHMSA) under 49 CFR Part 192, which sets safety standards for design, construction, operation, and maintenance.
Safety measures include cathodic protection to prevent corrosion, regular inline inspections, leak detection systems, and compliance with PHMSA integrity management programs. In seismically active areas, pipelines may also be designed with flexible joints and monitored for ground movement.
This pigging location is part of PG&E's natural gas transmission system, which delivers gas to residential, commercial, and industrial customers in Sonoma County and the broader Bay Area, supporting heating, power generation, and industrial processes.
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