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Motiva Enterprises (1406), Norco

LDEQ Accident Report

Accident #146217
State Police #13-00331
Accident Date2013-01-22
Report Date 2013-01-29
Follow-up Date 2013-03-21
Follow-up: Yes

Pollutants Released

Pollutant Duration Point Source Greenhouse Gas Criteria Pollutant Ozone forming chemical Amount of Release
Benzene6d 17h 27mDe-watering sump west of Tank F-501NONOYES206.8 pounds
Ethylbenzene6d 17h 27mDe-watering sump west of Tank F-501NONOYES103.4 pounds
n-Hexane6d 17h 27mDe-watering sump west of Tank F-501NONONO426.6 pounds
Naphthalene6d 17h 27mDe-watering sump west of Tank F-501NONOYES193.9 pounds
Polycyclic Aromatic Hydrocarbons6d 17h 27mDe-watering sump west of Tank F-501NONOYES239.2 pounds
Xylene6d 17h 27mDe-watering sump west of Tank F-501NONONO568.8 pounds
Toluene6d 17h 27mDe-watering sump west of Tank F-501NONONO349.0 pounds
Crude Oil6d 17h 27mDe-watering sump west of Tank F-501NONONO9,334.9 pounds

Accident Classified As: Reportable Quantity

Cause of Problem: Equipment Failure

On January 22, 2013 at 16:33 the de-watering sump west of Tank F-501 overflowed onto the ground. The check valve failed open with some of the material contained withing the concrete pump pad. Approximately 3 barrels of Crude oil spilled to the ground, with additional oil overflow into nearby surface drains. Follow-up Report: Operations determined that the source of the spill was the result of the check valve of the sump pumps failing open allowing crude oil to flow backwards into the sump and eventually overflowing with some of the material contained within the concrete pump pad.

Discharge Preventable - Yes

This release was preventable.

Notes/Remedial Actions

Clean up efforts were implemented. A pumper truck was staged at the pump pad to remove the oil from the concrete pump pad, sump, drains, and ground. Once the oil was removed from the concrete pump pad the area and drains were water washed to a pumper truck to remove all residual oil. Follow-up report: Immediately after discovering the source, operations personnel closed the discharge block valve of the sump pump to isolate the leak source. Temporary small dikes were quickly set up to stop additional oil flow from entering the storm water drainage. Vacuum trucks were called out to begin picking up free liquid. The underground storm water system was flushed with water and all oil vacuumed up for recovery into the refinery slop system until oil could no longer be detected. The remediation began on January 24, 2013 once all free liquid was collected. This work continued through the weekend until all contaminated soil was removed for inspection. After a final inspection, fresh soil was brought in to restore the area back to its original condition. Liquids were recovered and returned to the site slop oil system. Contaminated soils were excavated and properly disposed of. Material that evaporated during the release and recovery operation was released to atmosphere and dispersed naturally. The following measures will be implemented to prevent this incident from reoccurring: the sump pump discharge block valve was tagged closed to stop such an incident from reoccurring; vacuum trucks are being utilized to remove any water from the pump pads in the short term; operator surveillance in this area has been increased; the pump discharge check valve will be replaced and any deficiencies repaired in the pump pad secondary containment. All impacted soils were excavated and properly disposed of. Motiva has no current knowledge of pollution migration as free product was contained near Tank F-501 and has been recovered. The amount of crude oil initially reported as (3 barrels or 126 gallons), but they actually released 9646.68 gallons (229.68) of crude oil. Motiva also exceeded reportable quantities for benzene, napthalene, PAH, xylene, and toluene.