EQT MIDSTREAM

Incident Narrative

AT APPROXIMATELY 1:12 AM APRIL 7, 2012 GAS CONTROL RECEIVED AN ALARM FOR COPLEY COMPRESSOR STATION (544 COPLEY ROAD, WESTON, WV 26452-7174) UNIT #5 COMPRESSOR SHUT DOWN. GAS CONTROL IMMEDIATELY CONTACTED THE ON-CALL EQT COMPRESSOR TECHNICIAN WHO REPORTED TO THE SITE. THE COPLEY STATION ESD TRIPPED AT APPROXIMATELY 1:48 AM WHILE THE COMPRESSOR TECHNICIAN WAS EN ROUTE. THE COMPRESSOR TECHNICIAN ARRIVED AT THE SITE AT APPROXIMATELY 2:03 AM AND DETERMINED ALL ESD VALVES DID NOT CLOSE AND GAS WAS VENTING TO THE ATMOSPHERE. THE COMPRESSOR TECHNICIAN PROCEEDED TO SHUT OFF ONE BLOCK VALVE THAT WAS 100% OPEN AND TWO BLOCK VALVES THAT WERE 20% OPEN. THE VALVES WERE CLOSED AND GAS SHUT OFF AT APPROXIMATELY 2:08 AM. EQT FACILITIES ENGINEERING INVESTIGATED AND DETERMINED TWO OF THREE AIR COMPRESSORS THAT HOLD THE COPLEY AIR SYSTEM PRESSURE UP HAD SHUT DOWN ON HIGH TEMPERATURE. THE THIRD AIR COMPRESSOR COULD NOT HOLD THE SYSTEM UP AND WHEN THE AIR PRESSURE DECLINED BELOW 100 PSIG THE SYSTEM WENT INTO ESD. THERE WAS NOT ENOUGH SUPPLY AIR IN THE SYSTEM TO FULLY SHUT THREE OF THE ESD VALVES. DESIGN ENGINEERING CALCULATED THE GAS LOSS TO BE 11.2 MMCF WHICH REQUIRED AN INCIDENT REPORT FILING.