a 2014 California law mandated that all single-walled underground storage tanks and piping must be permanently closed or upgraded to double-walled systems by December 31, 2025. As a result 477 gas stations will close.

the State Water Board Website: Provides maps of remaining single-walled tanks and program details.

https://experience.arcgis.com/experience/0167aef5ced240ddb27331f6988dc8b2  for the interactive map

One is on the Navy Base at the Balboa Hospital, NBSD - NAVFAC Facilities & Co-Gen Steam Plant at NMCSD... that's federally owned by the DOD. 

https://www.waterboards.ca.gov/ust/single_walled.html  

https://www.facebook.com/photo/?fbid=1444793517144425&set=a.579285763695209