MAGELLAN PIPELINE COMPANY, LP

Incident Narrative

AT 13:00 ON 5/14/18, A PROPERTY OWNER NOTIFIED FIELD PERSONNEL AT INDEPENDENCE STATION OF A DISCOLORED AREA IN HIS FIELD. MAGELLAN FIELD PERSONNEL INSPECTED THE SITE AND FURTHER FIELD INVESTIGATION DETERMINED A PROBABLE RELEASE HAD OCCURRED. MAGELLAN'S 8-INCH PIPELINE WAS SHUT DOWN AND EMERGENCY RESPONSE PROCEDURES WERE IMPLEMENTED. ANTICIPATED HEAVY STORMS IN THE AREA REQUIRED SITE PREP ACTIVITIES TO BE CONDUCTED IN ORDER TO ACCESS THE RELEASE AREA. MATS WERE INSTALLED AND GRAVEL ROADS WERE CONSTRUCTED TO ALLOW EQUIPMENT ACCESS TO THE SITE. PRODUCT RECOVERY AND CONTAINMENT WAS ACCOMPLISHED WITH VACUUM TRUCKS AND EARTHEN BERMS AS DEFENSIVE MEASURES TO MINIMIZE THE FOOT PRINT AND CONSEQUENCES OF THE RELEASED PRODUCT. ADDITIONAL DEFENSIVE MEASURES WERE ALSO EMPLOYED AHEAD OF THE STORM SUCH AS INTERCEPTOR TRENCHES AND UNDERFLOW DAMS. AT APPROXIMATELY 20:30, THE AREA WAS IMPACTED BY SEVERE WEATHER AND THE LOCATION RECEIVED APPROXIMATELY 2-INCHES OF RAIN DURING A 5-HOUR PERIOD. THESE DEFENSIVE MEASURES WERE SUCCESSFUL AS ONLY A TRACE SHEEN WAS OBSERVED IN AN UNNAMED TRIBUTARY THAT IS A RECIPIENT OF THE AGRICULTURAL FIELD DRAINAGE. THE UNNAMED TRIBUTARY THAT THE TRACE SHEEN WAS OBSERVED FEEDS ROCK CREEK BUT, THERE WAS NO OBSERVATIONS OF RELEASED PRODUCT REACHING ROCK CREEK. THE CALCULATED TOTAL RELEASE VOLUME TO THE AGRICULTURAL FIELD WAS DETERMINED TO BE 555 BARRELS IN WHICH ONLY A SLIGHT SHEEN WAS OBSERVED IN THE UNNAMED TRIBUTARY ESTIMATED TO BE LESS THAN ONE GALLON. AFFECTED SOIL AT THE RELEASE SITE WAS EXCAVATED AND PROPERLY DISPOSED. IMPACTED RAINWATER WAS CONTAINED AND HAULED OFF SITE FOR PROPER DISPOSAL. MAGELLAN CONFIRMED THE RELEASE TO BE ORIGINATING FROM A PINHOLE IN A GIRTH WELD ASSOCIATED WITH THE ORIGINAL FABRICATION OF THE WELD. A TEMPORARY LEAK CLAMP WAS INSTALLED TO STOP THE RELEASE. IN ORDER TO PERMANENTLY REPAIR THE RELEASE SITE, THE LINE REQUIRED STARTUP TO DISPLACE THE GASOLINE BATCH WITH A DIESEL BATCH TO ENSURE SAFER WORKING CONDITIONS FOR WELDING AND REDUCE HAZARDOUS VAPORS. A PRESSURE REDUCTION WAS IMPLEMENTED AND A 30 MINUTE STATIC TEST WAS CONDUCTED PRIOR STARTING UP THE LINE FOR DISPLACEMENT ACTIVITIES. PERSONNEL WERE STATIONED AT THE LEAK SITE TO MONITOR CONDITIONS DURING THE GASOLINE DISPLACEMENT. ONCE THE GASOLINE BATCH WAS DISPLACED WITH DIESEL, DRAINUP ACTIVITIES WERE COMPLETED ON THE PIPELINE AND THE AFFECTED PIPE SECTION WAS REMOVED AND REPLACED WITH NEW PRE-TESTED PIPE. A REVIEW OF THE INLINE INSPECTION DATA WAS CONDUCTED BY THE ILI VENDOR TO IDENTIFY LOCATIONS WITH CHARACTERISTICS SIMILAR TO THE AFFECTED GIRTH WELD. TWO ADDITIONAL GIRTH WELDS WERE IDENTIFIED, EXCAVATED, AND REPAIRED BY INSTALLATION OF WELD REINFORCEMENT SLEEVES. 48-HR UPDATE: NRC # 1212200 SUPPLEMENTAL/FINAL FILED UPDATES(8/16/2018); PART E1, AND PART H NARRATIVE SUPPLEMENTAL/FINAL FILED UPDATES ( 9/5/2018): PART A4, A18 AND PART H NARRATIVE