SAN FRANCISCO (AP) — California regulatory judges recommended a $1.4 billion penalty on Tuesday — the largest safety-related levy ever against a public utility in the state — for a fiery 2010 gas pipeline explosion that killed eight people in a suburban San Francisco neighborhood. The California Public Utilities Commission said the figure reached by two administrative law judges over the San Bruno pipeline explosion reflected nearly 3,800 violations of state and federal law, regulations and standards by Pacific Gas & Electric Co.