TRUNKLINE GAS CO

Incident Narrative

AT THE TIME OF THE ESD, NATURAL GAS VENTED, AND TURBINE OIL ACCUMULATED IN THE PIPING DISCHARGED INTO THE AIR. BECAUSE AUTOMATED ESD RELEASES RESULT IN THE RAPID RELEASE OF PRESSURIZED NATURAL GAS, THE TURBINE OIL BECAME ATOMIZED AND TRAVELED OFFSITE SETTLING TO THE NORTH AND WEST OF THE FACILITY ALONG US HIGHWAY 90 AND LA HIGHWAY 182. DURING THE MIGRATION OFFSITE, THE TURBINE OIL IMPACTED VEHICLES TRAVELING ON US HIGHWAY 90 RESULTING IN VEHICLES PULLING OFF OF THE HIGHWAY ONTO THE HIGHWAY SHOULDER. AS A RESULT, ONE COLLISION OCCURRED. THE ST. MARY PARISH SHERRIFF?S DEPARTMENT AND THE LSP WERE PRESENT ON SCENE SHORTLY AFTER. TGC?S SPILL RESPONSE CONTRACTOR WAS CONTACTED AT APPROXIMATELY 8:53 A.M. ON 3/6/12 FOR INCIDENT IMPACT ASSESSMENT AND RESPONSE ASSISTANCE. SUBSEQUENT TO THE INCIDENT, TWO PRIVATE CITIZENS NOTIFIED TGC THEY SOUGHT MEDICAL ATTENTION AT NEARBY HOSPITALS. THEY WERE RELEASED SHORTLY AFTER TREATMENT. INCIDENT DID NOT MEET THE TYPICAL CRITERIA FOR REPORTING. REPORTING WAS INITIATED, SINCE TGC CONSIDERED THIS A ""SIGNIFICANT EVENT"". **THIS REPORT IS BEING SUBMITTED IN RESPONSE TO PHMSA'S REQUEST, (DOCKET ID PHMSA-2013-0028), FOR SUPPLEMENTAL REPORTS FROM OPERATORS WHO SUBMITTED REPORTS FOR INCIDENTS OCCURRING AFTER JANUARY 1, 2010, WITH ANY OF THE FOLLOWING: (1) ``PIPE GIRTH WELD'' WAS SELECTED AS THE ``ITEM INVOLVED IN INCIDENT'' IN PART C3 OF THE REPORT. THE REVISED REPORT COLLECTS DATA ABOUT THE PIPE ADJACENT TO THE GIRTH WELD. (2) ``FUNCTION OF PIPELINE SYSTEM'' IS NULL IN PART E5F OF THE REPORT. THE REVISED REPORT COLLECTS THE FUNCTION OF THE PIPELINE SYSTEM FOR ALL INCIDENTS.** PART E5F OF THIS REPORT HAS BEEN COMPLETED.