Manufactured Gas Plants

Former Madera Manufactured Gas Plant

Overview: PG&E and Southern California Gas worked together to clean up the site of a former manufactured gas plant (MGP) at the intersection of East Ninth and South E Streets in Madera, California. Environmental remediation work at the site was completed in 2011 as part of a voluntary program under the oversight of the California Department of Toxic Substances Control (DTSC). The 14-week-long project involved the removal of impacted soil beneath the footprint of the MGP site. The property is now used as a parking lot for a PG&E-owned construction yard.


A post-remediation evaluation was conducted in a June 2012 On-Site Remediation Closure Report (2012.PDF, 8.2 MB), which verified that the goal of achieving unrestricted land use was reached. DTSC agreed with this determination in a June 2012 Approval Letter (27.12.PDF0.PDF, 233 KB). In February 2013, DTSC issued a No Further Action (NFA) Letter (25.13.PDF, 226 KB) for the PG&E property.

An Off-Site Remediation Closure Report (25.13.PDF, 4.9 MB) discussing the successful removal of impacted soil in accessible off-site areas was determined to be complete by DTSC in January 2013. However, for portions of two adjacent City streets with arsenic greater than background levels, a DTSC-required Soil Management Plan (SMP) was prepared that will be coordinated through the City of Madera for any future work that may take place in these areas.

History: The former Madera MGP operated from 1913 to 1931. The site resides in a present day commercial/industrial area, in close proximity to one single-family home. The former MGP plant was dismantled when natural gas became available in Madera, and the MGP structures were removed from the site between 1931 and 1935. PG&E purchased the property in 1931 from the company now known as the Southern California Gas Company.


Community Benefits:

  • Installation of a new fence around the perimeter of the site, and
  • Installation of a new lighting system to better serve the surrounding community.

Sustainability: Sustainable practices are important to PG&E. We try to reduce our carbon footprint on environmental remediation projects, to the greatest extent possible. On this project, we were able to recycle 487 tons of asphalt/concrete, contribute $533,000 to the local economy and provide 1,991 hours of work to local community members.

Additional Resources:

Site-related documents can also be found at:
Madera County Library –121 North G Street, Madera (559-675-7871)

All MGP Locations
Chico Oakdale San Rafael
Colusa Oakland Santa Cruz
Daly City Oroville Santa Rosa
Eureka Red Bluff Selma
Fresno - 1 Redding St. Helena
Fresno - 2 Redwood City Stockton
Hollister Sacramento -1 Tracy
Lodi Salinas Turlock
Madera San Francisco - Adjacent To Potrero Vallejo
Marysville - 1 San Francisco - Beach Street Watsonville - 1
Merced San Francisco - Fillmore Watsonville - 2
Modesto - 1 San Francisco - North Beach Willows
Monterey San Francisco - Potrero Woodland
Napa San Luis Obispo - 1
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