SUNOCO PIPELINE L.P. — Hazardous liquid — incident on 2015-07-16

Hazardous liquid incident in MAYSVILLE, GARVIN County, OK. Reported cause: INCORRECT OPERATION. Reported consequences: 0 fatalities, 0 injuries, 1 CRUDE OIL released, $750 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: 20150284.

Operator ID: 18718.

Reported incident date: 7/16/2015 11:00.

Location detail: 0+00

Cause detail: TANK, VESSEL, OR SUMP/SEPARATOR ALLOWED OR CAUSED TO OVERFILL OR OVERFLOW

Cause detail: ON 7/16/2015 MAYSVILLE STATION WAS DOWN FOR SCHEDULED MAINTENANCE WORK. AS PART OF THE LO/TO TO ISOLATE MAYSVILLE STATION A MLV OUTSIDE OF THE STATION WAS LO/TO'D. A MANUAL PUMP AT AN INJECTION POINT BETWEEN MAYSVILLE AND THE LO/TO'D MLV WAS TURNED ON. NORMAL FLOW FROM THIS INJECTION POINT IS EAST TO SEMINOLE. HOWEVER, THE MANUAL INJECTION PUMPED AGAINST THE CLOSED MLV WHICH CAUSED PRESSURE TO BACKUP TO MAYSVILLE STATION. THIS BACKUP CAUSED THE SUMP DRAIN LINES OF THE MAINLINE PUMPS TO OVERFLOW RELEASING <1 BARREL TO THE CONCRETE PAD WHERE THE PUMPS ARE SITUATED. THE MANUALLY OPERATED FIELD PUMP WAS SHUT DOWN RELIEVING THE PRESSURE AND THE RELEASE STOPPED. ALL FREE OIL WAS IMMEDIATELY CLEANED UP FROM THE CONRETE PAD.

PHMSA trend classification: not significant, not serious.

PHMSA standardized cause: INCORRECT OPERATION — OVERFILL/OVERFLOW OF TANK/VESSEL/SUMP.

PHMSA indexed costs: $2,800 reported total cost, $1,404.667 in 1984 dollars, $3,459.263 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.