ROSE ROCK MIDSTREAM L.P. — Hazardous liquid — incident on 2016-04-28

Hazardous liquid incident in Not Within a Municipality, STAFFORD County, KS. Reported cause: CORROSION FAILURE. Reported consequences: 0 fatalities, 0 injuries, 4 CRUDE OIL released, $12,500 reported property damage. Operator-reported incident data submitted to PHMSA, generally within 30 days. Records may be supplemented or corrected and do not represent final agency causal findings.

Report number: 20160160.

Operator ID: 31476.

Reported incident date: 4/28/2016 10:45.

Location detail: 10

Cause detail: INTERNAL CORROSION

Cause detail: 4/18/2017 - UPDATED ANTICIPATED REMEDIATION TO YES, AND THAT SOIL WAS REMEDIATED. 10:45 AM ON 4/28/2016, THE AERIAL PATROL PILOT IDENTIFIED A LEAK IN CORN FIELD. THE AERIAL PATROL PILOT NOTIFIED THE MAINTENANCE SUPERVISOR WHO CONTACTED THE CONTROL CENTER TO IMMEDIATE SHUT DOWN HANSTON STATION. THE MAINTENANCE SUPERVISOR DROVE TO KAUFMAN JUNCTION AND CLOSED BLOCK VALVE AT 11:15 AM. HE THEN DROVE TO HUDSON STATION AND CLOSED THE DOWNSTREAM VALVE. A VAC TRUCK AND BACKHOE WERE DISPATCHED FOR REMEDIATION AND TO UNCOVER THE PIPE. THE PIPE WAS UNCOVERED AT 14:00 AND IT WAS FOUND THE 8" PIPE HAD AN INTERNAL INVOLVED CORROSION PINHOLE LEAK IN THE 7 O'CLOCK POSITION. ON 5/2/16, WE COMPLETED A 13' 9" PIPE REPLACEMENT WITH WELDS BEING COATED. THE PIPELINE WAS PUT BACK INTO SERVICE ON 5/2/16 AT 13:45. 7/19/2017 THIS REPORT WAS CORRECTED TO SHOW REMEDIATION WAS REQUIRED AND THE ASSOCIATED REMEDIATION COSTS WERE UPDATED

PHMSA trend classification: not significant, not serious.

PHMSA standardized cause: CORROSION — INTERNAL.

PHMSA indexed costs: $24,656 reported total cost, $12,267.443 in 1984 dollars, $30,210.937 in current-year dollars.

PHMSA trend flags, standardized causes, and indexed costs are analytical fields added to operator-reported incident data. They do not represent final agency causal findings.