MAGELLAN AMMONIA PIPELINE, L.P.

Incident Narrative

AT APPROXIMATELY 11:00 A THIRD PARTY SURVEYOR WORKING FOR MAGELLAN CALLED OPERATIONS CONTROL TO REPORT DEAD VEGETATION ON THE VERDIGRIS LATERAL ANHYDROUS AMMONIA PIPELINE AT M.P. 90.64. OPERATIONS CONTROL INITIATED AN INVESTIGATION EVENT, SHUT DOWN THE LINE AND NOTIFIED LOCAL MAGELLAN TECHNICIANS TO GO TO THE LOCATION AND INVESTIGATE. AT APPROXIMATELY 12:48 THE TECHNICIANS CONFIRMED THE DEAD VEGETATION AND AMMONIA ODOR IN THE SOIL. AT APPROXIMATELY 16:00 THE MAGELLAN AREA SUPERVISOR ARRIVED ON SCENE WITH CONTRACTOR PERSONNEL. THE AREA WAS SAFELY EXCAVATED AND THE LEAK WAS LOCATED AND IDENTIFIED AS A SMALL CORROSION PINHOLE. THE RELEASE WAS STOPPED BY 21:00 WITH THE INSTALLATION OF A PLIDCO REPAIR SLEEVE AND MADE PERMANENT BY FULLY WELDING THE PLIDCO REPAIR SLEEVE ACCORDING TO THE REPAIR PLAN APPROVED BY PHMSA. PRIOR TO THE RELEASE AN MFL TOOL RUN HAD BEEN COMPLETED AND WAS UNDER VENDOR ANALYSIS. THE TOOL RUN IDENTIFIED THE RELEASE LOCATION AS 31% DEEP EXTERNAL METAL LOSS. BASED ON THE ILI DATA ANALYSIS FOLLOWING THE RELEASE, 15 ADDITIONAL REHABILITATION LOCATIONS WERE ADDED TO THE REHABILITATION PLAN. THE RESULTS FROM THE RELEASE AND REHABILITATION SCHEDULE WILL BE INTEGRATED INTO THE INTEGRITY MANAGEMENT PLAN DURING THE RISK ANALYSIS PROCESS. AS PART OF THE ILI ANALYSIS OF SMART TOOL DATA FOR SIMILAR COATED LINES, ALL METAL LOSS FEATURES ARE GROWN AND CONSIDERED FOR REHABILITATION OR A SHORTEN REASSESSMENT INTERVAL. AS PART OF THE ILI ANALYSIS, METAL LOSS FEATURES WITHIN 6' OF THE GIRTH WELD ON SIMILAR COATED LINES ARE ALSO REVIEWED AND CONSIDERED FOR REHABILITATION. APPROXIMATELY 250 CUBIC YARDS OF NH3 IMPACTED SOIL WAS EXCAVATED AND PROPERLY REMEDIATED. SUPPLEMENTAL UPDATING NARRATIVE PART H.