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|LDEQ Accident Number
|Point Source(s)||Notes||Amount of Release|
|Coker Unit||Cause: Incident was due to a level controller malfunction.|
Notes: A level controller malfunctioned, allowing the liquid to go into a blowdown system which vents into the atmosphere. About 15 barrels of crude was released and contained. Unknown quantities of Xylene and Hydrogen Sulfide were released.
|Subsurface pipeline||Cause: A previously unidentified area of external corrosion on a 20" sub-surface pipeline failed during the unloading of a shipment of crude oil, resulting in hydrocarbons escaping to the surrounding soil.|
Notes: Operations immediately halted off-loading activities, isolated the line through the use of existing valves, called out additional personnel to begin containment, clean up and repair operations and notified the Norco Site Supervisor. Vacuum trucks were utilized to recover all standing liquids following the release as well as during de-inventorying of the line. Once the line was de-inventoried and prepped, an external weld clamp was installed over the isolated area of corrosion. After removal of the liquid hydrocarbon was completed, excavation of visually stained soils was initiated. The line will be excavated and inspected on a five-year interval. During the release only the near-surface soils and those directly adjacent to the leak were affected. There was no evidence of pollution migration. A copy of the PSI Investigation report is attached in PDF.
|pipe in dewatering system||Cause: A 1/2" diameter previously unidentified area of external corrosion on a 6" sub-surface crude water draw line failed during normal operations.|
Notes: Operations immediately isolated the line through the use of existing valves, called out additional personnel to begin containment, clean up, and repair operations and notified the Norco Site Supervisor. Vacuum trucks were utilized to recover all standing liquids. After removal of the liquid hydrocarbon was completed, excavation of visually stained soils was initiated. An external clamp has been installed on the line and the repair area re-coated to prevent additional corrosion. A project has been initiated to relocated this water draw piping above ground.
|De-watering sump west of Tank F-501||Cause: 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.
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.|
Notes: 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.