The South Coast Air Quality Management District on Monday reduced the permitted hours of operation at a Sun Valley waste-to-energy plant that has been accused of producing foul odors.
Under a temporary variance granted Monday after a three-day hearing, Pacific Lighting Energy Systems will be allowed to operate from 8 p.m. to 4 a.m. Monday through Friday and all through the weekend.
The plant thus will have to shut down during hours when nearby businesses are open, said Peter Greenwald, senior deputy air district counsel.
There had been no restrictions on the plant's operating hours.
The air district board also ordered Pacific Lighting to come up with a permanent plan to reduce odors from the plant, which generates electricity by burning gas from decaying trash in the inactive Penrose Pit landfill at 8301 Tujunga Ave.