EXXONMOBIL PIPELINE CO

Incident Narrative

A SMALL RELEASE OF (20 GALLON OF CRUDE- 0.5 BARRELS) OCCURRED ON THE 2"" DRAIN LINE AT SILVERTIP STATION, IN CARBON COUNTY. SILVERTIP STATION IS RURAL AND IS LOCATED 7 MILES FROM THE CLOSEST TOWN OF BELFRY, MONTANA. THE RELEASE WAS CONTAINED INSIDE THE EMPCO SECURED FENCED FACILITY. EMPCO PERSONNEL WERE ON SITE WHEN THE RELEASE OCCURRED ON THE DRAIN LINE. THE DRAIN LINE WAS ISOLATED AND IMPACT WAS ONLY TO SOIL INSIDE THE STATION SECURED FACILITY. THE SMALL RELEASE WAS IMMEDIATELY CLEAN UP. EXCAVATION OF THE RELEASE FOUND A CRACK THREADED NIPPLE ON THE 2""DRAIN LINE. THE DRAIN LINE WAS REPAIRED, AND THE SOIL WAS INSTALLED IN ROLL OFF BOX FOR DISPOSAL AT AN EXXONMOBIL APPROVED WASTE SITE. 8-3-12 CREATE SUPPLEMENTAL REPORT TO CLOSE THE 7001 - FAX LINE UPDATED AND ALL WORK COMPLETED- FINAL 8-23-12- SUPPLEMENTAL CREATED TO CHANGE SECTION G APPARENT CAUSE FROM (G-8) TO (G-4)-OTHER OUTSIDE FORCE DAMAGE. THE INVESTIGATION DID NOT REVEAL A CONCLUSIVE DIRECT CAUSE OF CRACKED ON THREADED 2"" NIPPLE ON THE DRAIN LINE. THE CRACK ON THE THREAD IS BELIEVED TO HAVE BEEN CREATED BY SOME UNKNOWN FORCE OVER THE YEARS. 10-31-12 SUPPLEMENTAL REPORT CREATED TO CHANGE SECTION G APPARENT CAUSE FROM( G-4) TO (G-5) LINE PIPE. 1/29/13- CREATED SUPPLEMENTAL TO CLOSE AS FINAL 7-31-13 SUPPLEMENTAL REPORT CREATED-MISSING INFORMATION IN SECTION E 5 (F) TRANSMISSION LINE WAS ADDED TO CORRECT NULL-BLANK SPACE AS REQUESTED PER PHMSA.