CONOCOPHILLIPS — Hazardous liquid — incident on 2011-08-27

Hazardous liquid incident in BYRON, CONTRA COSTA County, CA. Reported cause: EXCAVATION DAMAGE. Reported consequences: 0 fatalities, 0 injuries, 56 CRUDE OIL released, $20,000 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: 20110363.

Operator ID: 31684.

Reported incident date: 8/27/2011 5:50.

Location detail: C-23

Cause detail: EXCAVATION DAMAGE BY THIRD PARTY

Cause detail: MISCELLANEOUS ROOT CAUSES

Cause detail: ROOT CAUSE NOT LISTED (COMMENT REQUIRED)

Cause detail: 3RD PARTY DIGGING OVER LINE NC-21 APPROXIMATELY 3 MILES DOWNSTREAM FROM BYRON PUMP STATION JUST WEST OF VASCO ROAD STRUCK OUR LINE CAUSING A RELEASE OF 56 BARRELS OF RODEO REFINERY COKER MIX. THE CONTROL CENTER SHUT THE LINE DOWN ON LOW PRESSURE ALARM FOR PLM. THE TRACY OFFICE PERSONNEL RESPONDED.

PHMSA trend classification: significant incident, not serious.

PHMSA standardized cause: EXCAVATION DAMAGE — THIRD PARTY EXCAVATION DAMAGE.

PHMSA indexed costs: $1,275,040 reported total cost, $683,873.287 in 1984 dollars, $1,684,169.434 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.