California Code, Public Resources Code - PRC § 3183

(a) The division, in consultation with the State Air Resources Board, shall determine and adopt by regulation what constitutes a reportable leak from a gas storage well and the timeframe for reporting that leak. The regulations shall require an operator to immediately report to the division a leak that poses a significant present or potential hazard to public health and safety, property, or to the environment.

(b) Until the regulations pursuant to subdivision (a) are in effect, a leak of any size from a gas storage well shall be deemed a reportable leak, and the operator shall notify the division immediately.

(c) If a leak from a gas storage well that is reported to the division pursuant to subdivision (a) or (b), as applicable, cannot be controlled within 48 hours, the division shall post information about the leak on its internet website and provide regular updates to the public until the leak is stopped.

(d) The division, in consultation with the State Air Resources Board, shall review and, if necessary, revise the regulations developed pursuant to subdivision (a) no less than once every 10 years.