COLONIAL PIPELINE CO

Incident Narrative

ON 9 JUNE, 2010, AT APPROXIMATELY 0800 EDT, A THIRD PARTY REPORTED TO THE LOCAL OPERATOR THAT HE HAD OBSERVED PRODUCT LEAKING FROM THE VICINITY OF THE TRANSMIX INJECTION PUMP. THE INJECTION PUMP WAS IMMEDIATELY SHUT DOWN AND THE OPERATIONS MANAGER WAS NOTIFIED. AN INSPECTION OF THE SYSTEM REVEALED A CRACK IN A 3/4"" SCHEDULE 80 PIPE NIPPLE THAT WAS PART OF THE PUMP'S DISCHARGE RELEIF SYSTEM. THE PIPE NIPPLE WITH THE CRACK WAS REMOVED AND A PERMANENT REPLECEMENT WAS INSTALLED. CONTRACT CREWS REMOVED APPROXIMATELY 6 CUBIC YARDS OF SOIL IN THE VICINITY OF THE PUMP. ADDITIONAL ASSESSMENT REVEALED PRODUCT HAD MIGRATED INTO THE SANDY SOIL TO THE DEPTH OF GROUNDWATER WHICH IS APPROXIMATELY 15 FEET BELOW LAND SURFZCE. APEX ENVIRONMENTAL CONSULTANT HAS BEGAN FORMULATING A REMEDIATION PLAN USING CHEMICAL OXIDATION AGENTS. CURRENTLY AWAITING APPROVAL FROM SCDHEC TO BEGIN REMEDIATION. EXCAVATED SOIL WILL BE TRANSPORTED TO AN APPROVED DISPOSAL FACILITY. LORI LANDMEYER WITH SCDHEC WAS NOTIFIED OF THE RELEASE AT 1600 EDT ON 9 JUNE,2010. SHE REQUESTED FOLLOW UP INFORMATION AS IT BECOMES AVAILABLE. THE RELEASED PRODUCT WAS IMMEDIATELY ABSORBED INTO THE SOIL AROUND THE PUMP BASE, THEREFORE EVAPORATIVE LOSSES WERE CONSIDERED TO BE NEGLIGIBLE. ASSESSMENT ACTIVITIES INDICATE THAT APPROXIMATELY 66 TONS OF SOIL WERE IMPACTED BY THE RELEASE. LABORATORY ANALYSIS OF SOIL SAMPLES COLLECTED FROM THE IMPACTED AREA INDICATE THAT AN ESTIMATED 455 GALLONS OF PRODUCT ARE CONTAINED WITHIN IMPACTED SOILS. THE TOTAL RELEASE VOLUME IS BASED UPON THE AMOUNT OF PRODUCT WITHIN IMPACTED SOILS. AN ESTIMATED 55 GALLONS OF THE RELEASED PRODUCT WERE RECOVERED IN THE 6 CUBIC YARDS OF EXCAVATED SOIL WHICH WILL BE SENT OFF-SITE FOR DISPOSAL. NO IMPACTS WERE OBSERVED IN ADJACENT GROUNDWATER MONITORING WELLS, HOWEVER, ASSESSMENT ACTIVITIES INDICATE THAT GROUNDWATER MAY BE IMPACTED IN THE IMMEDIATE VICINITY OF THE RELEASE. CHEMICAL OXIDATION OF IMPACTED SOIL HAS BEEN USED SUCCESSFULLY IN THE RECENT PAST AT THE FACILITY. REAPPLICATION OF THIS TECHNOLOGY IS EXPECTED TO FULLY ADDRESS IMPACTS TO SOIL AND GROUNDWATER FROM THIS RELEASE. SURFACE WATER WAS NOT IMPACTED BY THIS RELEASE.