FCC Upset Triggers SO2 Release at Marathon El Paso Refinery


   
   HOUSTON, TX (DTN) -- Marathon reported a 24-hour sulfur dioxide emission at 
its Fluid Catalytic Cracker (FCC) unit at its 133,000 bpd El Paso Refinery, 
according to a filing with the Texas Commission on Environmental Quality.

   The incident began at 7:47 p.m. CT on Tuesday (8/4), and it ended at 7:47 
p.m. CT on Wednesday (8/5).

   According to the initial filing released on Wednesday, the refinery's FCC 
unit experienced an upset and shut down, triggering 862.0-pounds sulfur dioxide 
(SO) emissions from the South Main Flare and Tank T-4118.

   "The FCC and other process units were shut down following operating 
procedures", the company said.




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