FILE - People chant slogans during a protest outside the Aliso Canyon storage facility, in the Porter Ranch section of Los Angeles on May 15, 2016. (AP Photo/Jae C. Hong, File)

FILE - A gas gathering plant sits on a hilltop at the Southern California Gas Company's Aliso Canyon storage facility near the Porter Ranch neighborhood of Los Angeles on Jan. 12, 2017. (AP Photo/Jae C. Hong, File)