ROSE ROCK MIDSTREAM L.P. — Hazardous liquid — incident on 2015-03-15

Hazardous liquid incident in Not Within a Municipality, PAYNE County, OK. Reported cause: EQUIPMENT FAILURE. Reported consequences: 0 fatalities, 0 injuries, 0.2 CRUDE OIL released, $3,000 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: 20150131.

Operator ID: 31476.

Reported incident date: 3/15/2015 12:15.

Location detail: MFOLD A, V 16

Cause detail: MALFUNCTION OF CONTROL/RELIEF EQUIPMENT

Cause detail: THE VALVE WAS ISOLATED AND NOT IN OPERATION AT THE TIME OF THE FAILURE. SUBSEQUENT INVESTIGATION OF THE VALVE INDICATES IMPROPER TORQUEING OF THE MOUNTING BOLTS DURING MANUFACTURING. ALL OTHER VALVES IN THIS PORTION OF THE MANIFOLD AND OF SIMILAR MANUFACTURE WERE INSPECTED FOR SIMILAR DAMAGE. NO ADDITIONAL DAMAGE WAS FOUND.

PHMSA trend classification: not significant, not serious.

PHMSA standardized cause: EQUIPMENT FAILURE — MALFUNCTION OF CONTROL/RELIEF EQUIPMENT.

PHMSA indexed costs: $5,550 reported total cost, $2,784.251 in 1984 dollars, $6,856.753 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.