In a suit filed Friday in Alameda County Superior Court, Harris and the prosecutors allege that dating back to October 2006 the tanks at 780 Arco stations were not properly maintained and inspected. The civil suit also claims that the leak detection devices and alarm systems on the tanks were tampered with.
The stations are operated by BP subsidiaries BP West Coast Products, BP Products North America, Inc., and Atlantic Richfield Company.
A spokesman for BP described the alleged incidents as "procedural violations" and said there was no potential harm to human health or the environment.
The lawsuit follows a similar suit filed last month against ConocoPhillips and its spinoff, Phillips 66.