# SUNOCO PIPELINE L.P. — Hazardous liquid — incident on 2015-03-01 **Citation:** PHMSA Report 20150095 **Type / status:** incident / historical **Agency:** Pipeline and Hazardous Materials Safety Administration **Effective:** 2015-03-01 **Published:** 2015-03-18 Hazardous liquid incident in ASTON, DELAWARE County, PA. Reported cause: EQUIPMENT FAILURE. Reported consequences: 0 fatalities, 0 injuries, 0.12 REFINED AND/OR PETROLEUM PRODUCT (NON-HVL) WHICH IS A LIQUID AT AMBIENT CONDITIONS released, $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. PHMSA trend classification: not significant, not serious. ## Document text Hazardous liquid incident in ASTON, DELAWARE County, PA. Reported cause: EQUIPMENT FAILURE. Reported consequences: 0 fatalities, 0 injuries, 0.12 REFINED AND/OR PETROLEUM PRODUCT (NON-HVL) WHICH IS A LIQUID AT AMBIENT CONDITIONS released, $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: 20150095. Operator ID: 18718. Reported incident date: 3/1/2015 18:00. Location detail: 0+00 Cause detail: THREADED CONNECTION/COUPLING FAILURE Cause detail: A QUALITY ASSURANCE SPECIALIST WORKING AT TWIN OAKS PUMP STATION REPORTED TO THE CONTROL CENTER THAT THERE WAS A PRODUCT (ULSD) LEAK AT PUMP UNIT #2. CONTROL CENTER SHUT DOWN PUMP UNIT #2. INCIDENT NOTIFICATIONS WERE MADE. RESPONDERS RECOVERED ULTRA LOW SULPHUR DIESEL (ULSD) FROM PUMP UNIT #2 CONTAINMENT PAN. THE LEAK POINT WAS IDENTIFIED AT A THERMAL RELIEF VALVE THREADED 1/4" NPT CONNECTION (INLET SIDE). THE PARTS AT THE LEAK POINT WERE REMOVED AND REPLACED WITH PIPING AND A LARGER THERMAL RELIEF VALVE. PHMSA trend classification: not significant, not serious. PHMSA standardized cause: EQUIPMENT FAILURE — THREADED CONNECTION/COUPLING FAILURE. PHMSA indexed costs: $3,515 reported total cost, $1,763.359 in 1984 dollars, $4,342.61 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. ## Provenance - Official: Yes - Source: - Source ID: `phmsa-pipeline-incidents` - SHA-256: `abad68e065070c0f11c516c4b3e56c783db3b7de37e1e15e6f21dc2c1b9448c5` - Retrieved: 2026-08-20T03:30:32.010Z - Exported: 2026-08-24T16:15:51.728Z - Document slug: `phmsa-incident-fb8d6dd5ea35f35bdcb4de16` ### Source metadata ```json { "recordKind": "pipeline_incident", "datasetType": "hazardous_liquid", "datasetLabel": "Hazardous liquid", "datasetPeriod": "January 2010 to present", "report": { "number": "20150095", "supplementalNumber": "20967", "type": "SUPPLEMENTAL FINAL", "receivedDate": "2015-03-18", "receivedDateRaw": "3/18/2015" }, "operator": { "id": "18718", "name": "SUNOCO PIPELINE L.P." }, "incident": { "date": "2015-03-01", "dateRaw": "3/1/2015 18:00" }, "location": { "city": "ASTON", "county": "DELAWARE", "state": "PA", "postalCode": "19014", "latitude": 39.84512, "longitude": -75.420378, "type": "TOTALLY CONTAINED ON OPERATOR-CONTROLLED PROPERTY", "details": { "DESIGNATED_NAME": "0+00" }, "facilityName": "TWIN OAKS PUMP STATION" }, "cause": { "category": "EQUIPMENT FAILURE", "details": { "CAUSE_DETAILS": "THREADED CONNECTION/COUPLING FAILURE", "NARRATIVE": "A QUALITY ASSURANCE SPECIALIST WORKING AT TWIN OAKS PUMP STATION REPORTED TO THE CONTROL CENTER THAT THERE WAS A PRODUCT (ULSD) LEAK AT PUMP UNIT #2. CONTROL CENTER SHUT DOWN PUMP UNIT #2. INCIDENT NOTIFICATIONS WERE MADE. RESPONDERS RECOVERED ULTRA LOW SULPHUR DIESEL (ULSD) FROM PUMP UNIT #2 CONTAINMENT PAN. THE LEAK POINT WAS IDENTIFIED AT A THERMAL RELIEF VALVE THREADED 1/4\" NPT CONNECTION (INLET SIDE). THE PARTS AT THE LEAK POINT WERE REMOVED AND REPLACED WITH PIPING AND A LARGER THERMAL RELIEF VALVE." } }, "consequences": { "fatalities": 0, "injuries": 0, "commodity": "REFINED AND/OR PETROLEUM PRODUCT (NON-HVL) WHICH IS A LIQUID AT AMBIENT CONDITIONS", "release": "0.12", "propertyDamage": 500, "estimatedOperatorCost": 0, "estimatedEmergencyCost": 3000, "estimatedEnvironmentalCost": 0, "ignition": "NO", "explosion": "NO", "evacuated": 0, "raw": { "FATAL": "0", "INJURE": "0", "UNINTENTIONAL_RELEASE_BBLS": "0.12", "EST_COST_PROP_DAMAGE": "500", "PRPTY": "3515" } }, "provenance": { "viewId": "27nc-rsge", "viewUrl": "https://data.transportation.gov/api/views/27nc-rsge", "assetId": "1d547e17-2be1-4a32-9958-a1d5a946ade9", "archiveFilename": "Hazardous Liquid Accident Data - January 2010 to present.zip", "archiveSha256": "5aaa1a31834a0503acfdfc82172d9ff3483b480019cec1605ebb8e15d0040f0d", "memberPath": "accident_hazardous_liquid_jan2010_present.txt", "memberSha256": "2af519107224bbd22874e67c65f6aa526073a297b2b30104b711d071680488a4", "rowNumber": 3859, "rowSha256": "cc9e6fc34f0de52629e87a5182b0d2d7b8fdb3b24844c4605428b6109883e4d2" }, "caveat": "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.", "operatorReported": true, "finalAgencyFinding": false, "flaggedAnalysis": { "dataAsOf": "2026-07-31", "flags": { "fireFirst": null, "significant": false, "serious": false }, "standardizedCause": { "sevenCategory": "MATERIAL/WELD/EQUIP FAILURE", "sevenSubcategory": "THREADED CONNECTION/COUPLING FAILURE", "eightCategory": "EQUIPMENT FAILURE", "eightSubcategory": "THREADED CONNECTION/COUPLING FAILURE" }, "costs": { "reported": 3515, "in1984Dollars": 1763.3588913229833, "currentYearDollars": 4342.610248595105 }, "caveat": "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.", "provenance": { "sourceUrl": "https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/data_statistics/pipeline/PHMSA_Pipeline_Safety_Flagged_Incidents.zip", "landingPageUrl": "https://www.phmsa.dot.gov/data-and-statistics/pipeline/pipeline-incident-flagged-files", "catalogUrl": "https://data.transportation.gov/Pipelines-and-Hazmat/Pipeline-Incident-Flagged-Files/qdme-9bbm", "retrievalMode": "official_live", "archivedAt": null, "archiveSha256": "317e6a3e16d60b9b677efe391dc40258b5dd7ead83fb8bea74cb553cedfbbdec", "workbook": "hl2010toPresent.xlsx", "sheet": "hl2010toPresent", "rowNumber": 1965, "rowSha256": "ab5a82c6cd03826e0b29cd2fcd7c95da2c56292973e0a5c53e38753a44cee5a2" } }, "jurisdiction": "US", "operatorName": "SUNOCO PIPELINE L.P." } ```