(September 25, 2015, 8:19 AM EDT) -- SAN FRANCISCO — Chevron Corp., which was sued by a group of plaintiffs who contend that the company is liable for damages caused by the explosion of a natural gas rig, filed a brief in California federal court on Sept. 22 opposing the plaintiffs’ motion seeking enlargement of time in order to pursue class certification (Foster Ogola, et al. v. Chevron Corporation, No. 14-173, N.D. Calif.)....