COLONIAL PIPELINE CO

Incident Narrative

ON 12/27/2017, TECHNICIANS CONDUCTED A SITE VISIT TO THE PINE STREET TRAP FACILITY BASED ON A REPORT FROM AN OPERATOR OF STAINED GRAVEL. PINE STREET IS A REMOTE FACILITY THAT CONSISTS OF A LAUNCH TRAP AND IS THE BEGINNING POINT FOR THE 10"" SMITH BLUFF LINE WHICH TERMINATES AT PAPS. AT APPROXIMATELY 1412 THEY OBSERVED PRODUCT IN A DITCH THAT RUNS ALONGSIDE PINE STREET AND ORIGINATED FROM THE COLONIAL TRAP SITE. CONDITION OF THE DITCH WAS SUCH THAT IT WOULD NOT COMPLETELY DRAIN. TECHNICIANS AND OPERATORS VERIFIED THE PINE STREET TRAP WAS ISOLATED AND MADE REQUIRED INTERNAL NOTIFICATIONS. OSRO AND PIPELINE CONTRACTOR CREWS REMOVED PRODUCT AND IMPOUNDED WATER FROM THE DITCH VIA VACUUM TRUCKS, DEPLOYED SOCK AND CONTAINMENT BOOMS AND CONSTRUCTED UNDERFLOW DAMS IN THE DITCH TO PREVENT ANY FURTHER MIGRATION OF THE RELEASED PRODUCT. LESS THAN 150 FEET OF THE DITCH LINE WAS IMPACTED. SOIL EXCAVATION AND OTHER REMEDIATION EFFORTS BEGAN 12/28/2017 AND WERE COMPLETED ON 12/30/2017. A SPOOL PIECE AND THE TRAP DOOR WERE REMOVED AND REPLACED WITH A BLIND FLANGE ON 12/27/2017. THE SECOND PASS OF THE TORQUE ON THE FLANGE WAS COMPLETED AT APPROX. 0300 ON 12/28/2017. THE LINE WAS RETURNED TO SERVICE AROUND 0352 ON 12/28/2017. ALL REQUIRED EXTERNAL NOTIFICATIONS WERE MADE INCLUDING NRC (WHEN IT WAS DETERMINED THAT COSTS COULD EXCEED $50K THRESHOLD) AND THE TEXAS STATE EMERGENCY RESPONSE CENTER. A COURTESY CALL WAS ALSO MADE TO PHMSA AID OPS SUPERVISOR. NO OPERATIONS HAD OCCURRED AT PINE STREET SINCE DECEMBER 24TH. AN INCIDENT ANALYSIS WILL BE PERFORMED FOR THIS INCIDENT. FINAL REPORT: THE INCIDENT ANALYSIS REPORT CONCLUDED THE FOLLOWING ' AN O-RING FAILURE WAS FOUND TO BE THE PRIMARY SOURCE OF THE RELEASE. TO MITIGATE IMPACT OF A REOCCURRENCE THE TRAP DOOR WAS REMOVED AND REPLACED WITH A FLANGE. ADDITIONALLY, A CONCRETE BASIN WAS INSTALLED BELOW THE FLANGE TO CATCH PRODUCT IF NEEDED.