CALNEV PIPELINE CO

Incident Narrative

ON 2/16/17, AT APPROXIMATELY 0820, CALNEV PIPELINE'S COLTON NORTH OPERATOR ON DUTY WAS WALKING IN THE AREA OF TANK CN-137 WHEN HE NOTICED A SMELL OF FUEL NEAR THE TANK VALVE VAULT. THE OPERATOR REMOVED THE VAULT GRATING TO INVESTIGATE AND OBSERVED AN APPROXIMATE 8-INCH X 8-INCH WET AREA WITH WHAT APPEARED TO BE PRODUCT SEEPING INTO THE VAULT FROM THE TANK SIDE WALL. TESTING WITH A PORTABLE VAPOR DETECTOR SHOWED READINGS IN THE 30-40% LEL RANGE. HE IMMEDIATELY NOTIFIED THE AREA MANAGER AND BEGAN TELEPHONIC RELEASE NOTIFICATIONS TO NRC AND OES PER SAN BERNARDINO COUNTY SPECIAL AGREEMENT. ON FRIDAY, 2/17, NRC (#1171325) & OES (#17-1321) NOTIFICATIONS WERE UPDATED TO STATE THE COST OF PROPERTY DAMAGE ""PROBABLY"" WOULD EXCEED $50,000 MAKING IT TELEPHONICALLY REPORTABLE PER 195.52. SUBSEQUENT FIELD EXAMINATION AND NDT ANALYSIS/TESTING DETERMINED THAT FLEXING IN THE HEAT-AFFECTED ZONE CAUSED TWO (12-IN. & 18-IN.) HAIRLINE CRACKS IN THE FLOOR PLATES. NOTE: PART A, #4: INITIAL NOTIFICATIONS WERE MADE TO SATISFY SAN BERNARDINO COUNTY SPECIAL AGREEMENT, IT WAS DETERMINED TO MEET PHMSA TELEPHONIC CRITERION ON 2/17 AT 1430. NOTE: PART A, #8: RELEASE VOLUME ESTIMATED BY FOOTPRINT AREA AND DEPTH, SOIL CONDITIONS, SOIL PENETRATION, PRODUCT TYPE, AND EVAPORATION EFFECTS RESULTS IN 3.4 BBLS. NOTE: PART D, #8.E: EXPLORATORY EXCAVATION OUTSIDE OF THE TANK AND VAULT PRODUCED NO EVIDENCE OF CONTAMINATED SOIL OR ANY INCREASE IN PRODUCT IN THE ADJACENT (ALREADY EXISTING) MONITORING WELLS. ANY IMPACTS WOULD BE CONFINED BENEATH THE TANK. THE RELEASE AREA IS WITHIN THE RADIUS OF INFLUENCE OF AN EXISTING LONG-TERM SVE REMEDIATION SYSTEM CONDUCTED UNDER THE AUSPICES OF THE REGIONAL WATER QUALITY MANAGEMENT DISTRICT.