Chemical Spill at IB?

The beach along the Tijuana Estuary Preserve smelled like petrochemicals last week. There were no obvious globs of oil in the sand. However, there was a strong smell, similar to what you smell when you fill gas at the pump. There was also a dead pelican and a dead seal corpse rotting in the sand. Animals die; however, you could not help but wonder if these had a little help from man.