ENTERPRISE PRODUCTS OPERATING LP — Hazardous liquid — incident on 2006-10-25

Hazardous liquid incident in CLAY CENTER, CLAY County, KS. Reported cause: 1. Reported consequences: 0 fatalities, 2 injuries, YES ANHYDROUS AMMONIA released, $740,000 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: 20060326.

Operator ID: 31618.

Reported incident date: 10/25/2006.

Cause detail: CORROSION, EXTERNAL

Cause detail: CLAY COUNTY KANSAS SHERIFF DEPARTMENT CALLED ENTERPRISE PRODUCTS OPERATING LP AT 10:00 AM ON OCTOBER 25, 2006 REPORTING A VAPOR CLOUD RELEASE. OPERATING PERSONNEL VERIFIED AT 10:25 AM THAT THE RELEASE WAS ON THE WEST LEG NH3 LINE. AFTER DISCOVERY, THE PIPELINE WAS SHUTDOWN AND LINE SEGMENT BLOCKED IN. THE PUBLIC WAS EVACUATED FROM THE RURAL SITE UNTIL ALLOWED TO RETURN AT 1400 HOUR ON OCTOBER 26, 2006. PHMSA PERSONNEL WERE ON SITE OCTOBER 26, 2006. REPAIR BEGAN ON OCTOBER 26, 2006 AND WAS COMPLETED 28, 2006. THE RUPTURE SEGMENT WAS SENT FOR A METALLURGICAL ANALYSIS TO STRESS ENGINEERING IN HOUSTON, TX. THE METALLURGICAL EVALUATION CONCLUDED THAT THE CAUSE OF THE RUPTURE WAS METAL LOSS FROM EXTERNAL CORROSION. ALSO, BASED ON METALLOGRAPHIC EXAMINATION AND MECHANICAL TESTING, THE LONG SEAM WELD WAS FOUND TO BE ACCEPTABLE. THE REPAIRED LINE SEGMENT IS CURRENTLY OPERATING AT A 20% PRESSURE REDUCTION PURSUANT TO CORRECTIVE ACTION ORDER CPF NO. 3-2006-5044H. UPDATE: ALL ENVIRONMENTAL REMEDIATION WAS HANDLED BY THE OWNER MAGELLAN PIPELINE. EFFECTIVE JULY 1, 2008, TOTAL OPERATORSHIP WAS TRANSFERRED TO MAGELLAN PIPELINE AND ENTERPRISE NO LONGER IS INVOLVED WITH THE MAGELLAN NH3 PIPELINE.

PHMSA trend classification: significant incident, serious incident.

PHMSA standardized cause: CORROSION — EXTERNAL.

PHMSA indexed costs: $740,000 reported total cost, $432,727.878 in 1984 dollars, $1,065,675.586 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.