Manufactured Gas Plants

Former Vallejo manufactured gas plant

PG&E is working with the City of Vallejo and private property owners to clean up a 26-acre property near Curtola Parkway and Sonoma Boulevard. All work is being conducted voluntarily under the oversight of the California Department of Toxic Substances Control (DTSC). This is an important first step in the future redevelopment of the property.

Former Vallejo manufactured gas plant in the 1920s

Site Overview: A manufactured gas plant (MGP) operated at the site from the late 1800s to 1930. PG&E acquired the gas plant in 1905 and operated it until 1930, when it was put on standby status. The plant was largely dismantled by 1944. Gas-making operations took place on a piece of property south of Curtola Parkway that is now owned by the City. In addition, three gas holders were located to the north of Curtola Parkway on two smaller properties that are now privately-owned (see map).

Site overview about gas making operations

Current Status: In 2019, DTSC approved a plan, called a Remedial Action Plan, to address contamination in soil, soil gas and groundwater at the site. The cleanup plan calls for a combination of excavation and on-site treatment of contaminated soils. All remediation work is overseen and approved by DTSC.

This approach meets today’s regulatory requirements for long-term protection of public health and the environment, protects groundwater, supports future site redevelopment, and minimizes construction impacts such as truck traffic and noise.

PG&E is now preparing design drawings and securing the necessary permits to conduct cleanup work. Cleanup work will begin on the properties to the north of Curtola Parkway in 2020 and last three months. Work on the main site area will begin in 2021 and continue in phases for three and a half years.

PG&E will continue to keep the community informed about this project through fact sheets, work notices and other outreach, as appropriate. More information is available by calling the PG&E toll-free community hotline at (866) 247-0581.