PLANTATION PIPE LINE CO

Incident Narrative

ON JANUARY 26, 2019, EXCAVATION ACTIVITIES BEGAN IN THE COLLINS, MS TANK FARM CNG MANIFOLD AREA TO DETERMINE THE LOCATION OF A POSSIBLE RELEASE. A RELEASE WAS SUSPECTED DUE TO INFORMATION PROVIDED BY THE REMEDIATION GROUP INDICATING THAT SAMPLES TAKEN FROM PREVIOUSLY INSTALLED MONITORING WELLS WERE INDICATIVE OF 'FRESH' PETROLEUM PRODUCTS INSTEAD OF 'WEATHERED' OR 'OLD' PRODUCT FROM PREVIOUS OBSERVATION. A BURIED 30-INCH LEAKING FLANGE SET ON THE CNG SUCTION HEADER WAS DISCOVERED AS THE SOURCE OF THE RELEASE ON JANUARY 29, 2019. THE BURIED FLANGES WERE REPLACED WITH A 30-INCH PIECE OF PIPE. AN ADDITIONAL INVESTIGATION INTO MONITORING WELL DATA, PUTS A CONSERVATIVE ESTIMATE OF 10/13/18 AS THE DATE THE ACCIDENT REPORTING CRITERIA OF FIVE (5) GALLONS WAS EXCEEDED. THIS DATE IS BASED ON USING AN OBSERVED LEAK RATE FROM THE FLANGES CALCULATED AT 1.6 GALLONS/DAY AND USING THE LAST DATE (10/10/2018) THE MONITORING WELL WAS SAMPLED WITHOUT ISSUE. THE RELEASE WAS CONTAINED ONSITE AND HAD NO IMPACT TO PERSONS, PROPERTY OR THE ENVIRONMENT OUTSIDE OF THE TANK FARM BOUNDARY. UPDATE-5/9/2019 AN INVESTIGATION OF THE INCIDENT DETERMINED DAMAGE (GOUGE) TO THE FLANGE FACE WAS THE CAUSE OF THE RELEASE. IT WAS ALSO DETERMINED THE DAMAGE OCCURRED DURING INITIAL CONSTRUCTION.