WILLIAMS FIELD SERVICES - GULF COAST COMPANY, LP

Incident Narrative

WILLIAMS GCP DAMAGE PREVENTION TECH RECEIVED A CALL FROM BUCKEYE PIPELINE, JUST BEFORE 10:00 AM ON 8/6/18, LETTING HIM KNOW THERE APPEARED TO BE SOME TYPE OF PRODUCT ON THE GROUND AT THE BLOCK VALVE SITE OFF MILLER ROAD 2 (THIS VALVE PEN IS SHARED WITH MULTIPLE PIPELINE COMPANIES IN THE AREA, AND WILLIAMS HAS A BLOCK VALVE IN THIS PEN FOR THE 801 8"" ALKY/C5 RAFFINATE LINE). AFTER RECEIVING THE CALL FROM BUCKEYE, THE WILLIAMS DAMAGE PREVENTION OPS TECH AND SUPERVISOR WENT TO THE SITE. AFTER INSPECTING THE AREA, WILLIAMS REQUESTED THEIR PIPELINE CONTROL CENTER SHUT THE 801 LINE DOWN AT APPROXIMATELY 10:20 AM. OTHER PIPELINE OPERATORS IN THE AREA BEGAN SHUTTING IN AND ADDITIONAL WILLIAMS PERSONNEL WERE DISPATCHED TO THE SITE. BUCKEYE OPERATES A GASOLINE LINE FOR TARGA-LOCATED IN THE SAME VALVE PEN, AND IT WAS NOT OBVIOUS IF THE SHEEN WAS CAUSED BY EITHER OF THE LINES IN THE PEN. WILLIAMS AND BUCKEYE SENT A SAMPLES OF THE WATER/PRODUCT MIX TO DIFFERENT LABS FOR ANALYSIS IN AN ATTEMPT TO DETERMINE THE TYPE OF MATERIAL THAT CAUSED THE SHEEN. THE RESULTS WERE NOT HELPFUL IN PINPOINTING THE TYPE/ORIGIN OF THE MATERIAL. BUCKEYE PIPELINE HAD ASSUMED RESPONSIBILITY FOR THE RELEASE, UNTIL THE SOURCE OF THE RELEASE COULD BE DETERMINED. INITIAL REPORTS WERE MADE AND HYDRO-EXCAVATION BEGIN LATE AFTERNOON/EVENING ON 8/6/18. AS OF 7:30 AM 8/7/18, HYDRO-EXCAVATION OF BUCKEYE'S LINE AND PARTIAL EXCAVATION OF WILLIAMS IN-GROUND VALVE ON THE 801 LINE HAD NOT REVEALED A DEFINITIVE SOURCE OF THE RELEASE. WITH THE WILLIAMS'S LINE AND BURIED VALVE PARTIALLY EXPOSED, WILLIAMS'S OPERATIONS WORKED WITH THEIR PIPELINE CONTROL TO PERFORM A BUMP TEST ON THE LINE TO HELP DETERMINE IF THE RELEASE WAS FROM THE WILLIAMS'S PIPELINE. AT 11:05 AM, TUESDAY, AUGUST 7, WILLIAMS CONFIRMED THAT THE RELEASE WAS ON THEIR PIPELINE. WILLIAMS BEGAN TRANSITIONING CONTROL OF THE SITE AT THAT TIME, FROM BUCKEYE PIPELINE (WHICH INCLUDED CONTACTING THE TRRC/NRC/HARRIS COUNTY POLLUTION CONTROL TO INFORM THEM THAT WILLIAMS WAS RESPONSIBLE FOR THE RELEASE). WILLIAMS CONSTRUCTION CONTRACTOR BEGAN STAGING ADDITIONAL EQUIPMENT AND RESOURCES AROUND 12:00 PM - 8/7/18. HYDRO-EXCAVATION EFFORTS CONTINUED THROUGHOUT THE DAY/NIGHT TO FULLY EXPOSE THE VALVE AT THIS SITE, WHICH REVEALED A SMALL BONNET GASKET LEAK (FAILED BONNET O-RING) ON THE GROVE G4N BURIED BLOCK VALVE. A TEMPORARY VALVE LEAK REPAIR WAS MADE AT APPROXIMATELY 5:00 PM ON 8/9/18. WILLIAMS WILL CONTINUE TO MONITOR THE VALVE REPAIR UNTIL THE VALVE CAN BE REPLACED. 8/22/18 PEI REPORT ANALYTICAL RESULTS SHOW THAT CONTAMINATION WAS EXTREMELY LIMITED, AND THE LEVELS FOUND BY THE LAB DO NOT WARRANT ANY ADDITIONAL SOIL REMOVAL AT THIS TIME. ALL SAMPLE RESULTS WERE BELOW THE STANDARDS ""PROTECTIVE OF GROUND WATER"". PEI'S RECOMMENDATION IS THAT NO FURTHER ACTION IS REQUIRED AT THE SITE. UPDATE 9/5/18 WILLIAMS IS CURRENTLY PLANNING TO BRING THE TWO BURIED VALVES ON THIS LINE ABOVE GRADE, WHICH INCLUDES THE MILLER ROAD VALVE NOTED ON THE H-8 FORM, AND REPLACE THEM WITH NEW VALVES WITHIN THE NEXT YEAR. WILLIAMS WILL CONTINUE TO MONITOR THE MILLER ROAD BLOCK VALVE UNTIL THE VALVE REPLACEMENT PROJECT IS COMPLETE.