LOS ANGELES—Southern California air-quality regulators on June 18 issued violation notices to three companies connected to a drilling mishap that led to thousands of gallons of oil spilling in East Los Angeles.
The South Coast Air Quality Management District (AQMD) issued the violation notices to Arcadian Infracom, HP Communications and Camarillo Drilling over odors stemming from the May 22 spill, which occurred when an underground crude oil pip…