MARATHON PIPE LINE LLC

Incident Narrative

AT 07:45, A CALL WAS RECEIVED FROM LANDOWNER AT 6655 PLEASANT LAKE DRIVE STATING HE HAD SOME DEAD GRASS AND SMELLED ""OIL"" IN HIS BACKYARD. THE CANTON-EAST SPARTA #1-6"" (CES #1) LINE WAS ALREADY SHUT DOWN PER PIPELINE SCHEDULE. MPL TECHNICIAN RESPONDED TO THE SITE AND CONFIRMED THE PRESENCE OF DEAD GRASS AND SMELL OF PETROLEUM APPROXIMATELY 75 YARDS DOWNHILL FROM THE CES #1 SYSTEM. TECHNICIAN NOTIFIED EAST SPARTA SUPERVISION WHO RESPONDED TO THE SITE. SAMPLES OF THE SOIL AND WATER FROM A BELL HOLE THAT WAS DUG WERE ANALYZED. DURING WALK AROUND OF THIS LANDOWNER'S PROPERTY AND THE ADJACENT PROPERTY, A PETROLEUM SMELL WAS NOTICED COMING FROM A DRAINAGE TILE APPROXIMATELY 10 YARDS FROM THE PIPELINE AND 100 YARDS FROM THE SITE OF THE DEAD GRASS. A CONTRACTOR WAS NOTIFIED TO EXCAVATE THE LINE. AFTER EXCAVATING APPROXIMATELY 30 FEET OF THE LINE, ULTRALOW SULFUR DIESEL (ULSD) BEGAN TO SHOW IN THE SOIL AROUND THE LINE. EMERGENCY RESPONSE WAS INITIATED AT THIS TIME (~17:30). SHORT TERM -PLIDCO BOLD ON SLEEVE WAS PLACED ON PIPE AND PIPE WAS RETURNED TO SERVICE. PIPE WAS CUT OUT THE WEEK OF SEPTEMBER 13, 2010 AND SENT TO KIEFNER AND ASSOCIATES, INC. FOR ANALYSIS. RESULTS WERE DOCUMENTED IN THE REPORT DATED DECEMBER 13, 2010. RELEASE WAS A RESULT OF A BURN-THROUGH IN THE GIRTH-WELD AT THE 7:20 CLOCK POSITION. THE PINHOLE WAS 0.02 INCHES IN DIAMETER AND WAS LOCATED WITHIN AN AREA OF MISSING WELD CROWN. IT WAS DETERMINED THAT THE BURN-THROUGH OCCURRED DURING THE INITIAL WELDING PROCESS. THERE WERE NO INDICATIONS THAT CORROSION OR ENVIRONMENTAL CRACKING OF THE WELD METAL CONTRIBUTED TO THE FAILURE. THERE IS A HIGH GROUNDWATER TABLE AT THE SITE, SO GROUNDWATER FLUCTUATIONS HAVE CAUSED GROUNDWATER TO BE IN RELEASE ZONE CERTAIN TIMES OF THE YEAR. THEREFORE, WE HAVE SAID THAT ALL THE RELEASED VOLUME HAS CONTACTED GROUNDWATER, EVEN THOUGH THAT MAY NOT BE THE CASE DURING THE ENTIRE YEAR. 6/3/2013 PER REQUEST, THE ""PIPE GIRTH WELD"" INFORMATION HAS BEEN ADDED TO PART C3 OF THIS REPORT. 11/18/2016 IT WAS NOTED THAT THE ""SMYS OF PIPE"" IN QUESTION 3.C WAS INCORRECT. A REVISED, FINAL 7000-1 WAS SUBMITTED TO PROVIDE THE CORRECT SMYS OF 35,000 PSI.