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Motiva Enterprises (1406), Norco

LDEQ Accident Report

Accident #96300
State Police #07-1620
Accident Date2007-05-16
Report Date 2007-06-01
Follow-up Date 2007-05-21
Follow-up: Yes

Pollutants Released

Pollutant Duration Point Source Greenhouse Gas Criteria Pollutant Ozone forming chemical Amount of Release
StormwaterNONONO 

Accident Classified As: Below Reportable Quantity (BRQ)

Cause of Problem: Weather

Motiva's Stormwater Impoundment Basin was already at 8.5 ft from previous rains and exceeded hit capacity of 10 ft after heavy rainfall. Motiva had to open outfall to prevent flooding of the refinery, bypassing stormwater treatment system. During the storm event, employee observed stormwater leaking from refinery ditch through site perimeter levee and into St. Charles Parish stormwater ditch via a nutria burrow. A drain box/manhole box was also leaking stormwater off-site from the ditch. See also report #96302 of the same date.

Discharge Preventable - No

Notes/Remedial Actions

Nutria burrow repaired, drain box repair will take longer. Analysis of stormwater is included in reports and summarize below: Oil & Grease: 5.7 mg/L Total Organic Carbon: 13.2 mg/L Ph: 7.5 All below permit limits