The Diablo Canyon nuclear power plant, which sits on the edge of the Pacific at Avila Beach in San Luis Obispo County.
The California Coastal Commission has denied a request from PG&E for underwater seismic testing around the Diablo Canyon nuclear plant. The utility wants to use air guns to shoot high-decibel soundwaves deep into the ocean floor, which might provide data about underwater fault lines. But there are concerns the sound would hurt marine mammals. Reporter: Alison St. John
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