Hazardous Liquid Integrity Management: Performance Measure Reporting
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Protecting America’s High Consequence Areas (HCAs)
Beginning in 2004, hazardous liquid pipeline operators have been required to submit performance measure reports covering their pipeline infrastructure and their Integrity Management programs. PHMSA uses data from these reports—due on June 15th for the previous calendar year—to monitor and report on industry progress in meeting the requirements of the Liquid IM Rule, to prioritize operators for future agency inspections, and to respond to inquiries about PHMSA’s oversight program. For a basic overview of the progress being made under the Liquid IM Rule, please refer to the Quick Facts below.
Quick Facts for Liquid Integrity Management
The Hazardous Liquid IM Performance National Summary depicts, by year, the amounts of HCA (High Consequence Area) mileages, the number of HCA accidents, the rate of HCA accidents on a per mile basis, and both the baseline assessment and ensuing reassessment miles completed on HCA segments of the pipeline. This table also depicts the number of Immediate, 60-day, 180-day Condition, and Pressure Test Failure Repairs made within segments identified as those that could potentially impact an HCA.
The plot below, entitled "Cumulative Baseline and Reassessment Miles", shows the miles of pipelines that have been assessed or, beginning in 2010, reassessed under the Liquid IM Rule. A single “assessment” often uses more than one inspection tool, device, or test to adequately assess a particular pipeline. An assessment is complete when all of the required tools, devices, or tests have successfully evaluated the pipeline.
The plot below, entitled "HCA Repairs", shows the total number of repairs made in HCA segments of the pipeline which have been completed in a given year under the Liquid IM Rule. These include the three specifically-defined types of prioritized repairs occurring within HCA segments that are required by the Liquid IM Rule, namely, Immediate, 60-day, and 180-day Condition repairs (made as a result of In-Line Inspections, External Corrosion Direct Assessment, and other inspection techniques), as well as repairs made as a result of pressure tests that have been conducted.
The pie chart below, entitled "HCA Repairs by Type", depicts the percentages of the various types of HCA repairs (Immediate, 60-day, and 180-day) made as a result of In-Line Inspections, External Corrosion Direct Assessment, and other inspection techniques carried out since the Liquid IM Rule’s inception. (Note: Excluded from this chart are repairs resulting from pressure tests.)
Accidents are releases of hazardous liquid or carbon dioxide from a pipeline that results in one or more of the following consequences: a death or personal injury necessitating in-patient hospitalization; estimated property damage of more than $50,000; a release of 5 gallons or more of hazardous liquid or carbon dioxide (or 5 barrels or more resulting from most types of maintenance activity); or, an explosion or fire not intentionally set by the operator.
Immediate Repair - More specifically defined in 49 CFR 195.452 (4) (i), these repairs are deemed important enough to require a temporary reduction in operating pressure or shutdown of the pipeline until such time as the urgent repair is completed.
180-day Condition Repair - More specifically defined in 49 CFR 195.452 (4) (iii), these repairs are deemed less urgent than either Immediate Condition Repairs or 60-day Condition Repairs, but still must be completed within 180 days.
For all Immediate, 60-day, and 180-day Condition Repairs - These repairs result from In-Line Inspections (ILI), External Corrosion Direct Assessment (ECDA), and other inspection techniques used by operators. In all cases, operators must notify PHMSA (or PHMSA’s state partner agencies, depending on who has jurisdiction) and take additional mitigating action in the event the repair cannot be completed within the described deadlines. Additional repairs can result from Pressure Tests when they are conducted by operators (see definition below).