Manufactured Gas Plants
Former Santa Rosa Manufactured Gas Plant
PG&E, under the oversight of the North Coast Regional Water Quality Control Board, is investigating and remediating the site of a former manufactured gas plant (MGP) that historically operated near the corner of First Street and Santa Rosa Avenue in
Santa Rosa. The site is currently the location of an office building parking lot, and is no longer owned by PG&E.
In 2009, PG&E began a five-year, multi-phase remediation project for the former gas holder area which will be completed this summer. A 10,000 square foot portion of the parking lot at 111 Santa Rosa was closed to allow PG&E crews to safely conduct this work. PG&E crews removed 55,000 gallons of liquid coal tar using electrical resistance heating technology, stabilized soils with a slurry/grout mixture to address significant ground settlement from removal activities, and excavated and disposed of 200 tons of soil containing former gas plant residues. The project will be completed by summer 2013 and the site will continue to be used as a parking lot.
Remediation plans for the remaining portions of the site are being developed under the continued oversight of the Regional Water Board. PG&E prepared a Feasibility Study which the Water Board approved in 2012; however, we are continuing to evaluate other options that are environmentally protective and result in fewer impacts to the surrounding community and local businesses. PG&E anticipates that plans to address the remaining impacts at the site will be finalized in 2013 or 2014.
PG&E acquired and operated the former Santa Rosa MGP from 1908 until 1924, at which time the plant was closed and dismantled. The site later operated as a natural gas distribution center and PG&E sold the property in 1987.
- Press Democrat: PG&E is Committed to Cleanup in Downtown Santa Rosa, April 2013
- Currents Article: Santa Rosa - PG&E Making Progress on Cleanup of Century-Old Gas Plant
- Final Supplemental Feasibility Study, April 2012 (PDF, 12.5 MB)
- Draft Feasibility Study Informational Notice, July 2010 (PDF, 298 KB) (2010.PDF, 298 KB)
- Regional Water Board Resources & Contact Information
- Informational Notice, July 2010 (PDF, 298 KB)