Hazardous Liquid Integrity Management Flowchart Legend Step 1

Hazardous Liquid Integrity Management Flowchart ----- Legend ----- Step 1: Produce Baseline Assessment Plan Assessment Integration Step 1 1. 1 (Assessment) Access PHMSA Information on HCAs and locate all HCAs that overlay or are in proximity to operator’s pipelines 1. 2 (Assessment) Identify all segments where leak/rupture could impact HCA 1. 3 (Assessment) Determine when each segment was last assessed, type of assessment, and results 1. 4 (Integration) Assemble and consolidate by segment all information that could impact task 1. 5 (Integration) Assess risks associated with each segment and prioritize all segments based on risk significance (which incorporates info from previous assessments) 1. 6 (Assessment) Determine appropriate type of assessment(s) for each segment given key failure modes and segment conditions Validation Communication Remediation Program Development Decision 1. 7 (Decision) Has technology other than pigging, pressure testing, or ECDA bee selected for any segment(s)? Yes 1. 8 (Communication) Inform PHMSA and document basis for equivalent understanding of pipe condition No 1. 9 (Assessment) Establish a baseline assessment schedule with highest risk segments addressed first 1. 10 (Assessment) Document baseline assessment plan including assessment methods, schedule, and basis No 1. 11 (Decision) Does the baseline schedule result in mileage being assessed as required? Yes Step 2

Hazardous Liquid Integrity Management Flowchart Step 2: Perform Assessments and Repair as Necessary Step 2 2. 1 (Assessment) Perform assessments and evaluate results in accordance with plan No 2. 2 (Integration) Compare results to repair criteria to determine appropriate repair requirements and schedule 2. 3 (Decision) Are there any immediate repair conditions? 2. 12 (Communication) Document EFRD and leak detection system evaluation 2. 13 (Integration) Update risk analysis and segment prioritization 2. 11 (Remediation) Install EFRDs or enhance leak detection system Yes 2. 4 (Remediation) Reduce pressure or shutdown until immediate repair conditions are addressed Yes 2. 10 (Decision) Are EFRDs or leak detection system improvements necessary? 2. 9 (Integration) Re-analyze risks of segment and implement any additional preventive and mitigative actions No 2. 5 (Decision) Can repairs be made consistent with Part 195. 452(h)(4)(i)-(iv)? Yes No 2. 6 (Communication) Inform PHMSA and document basis 2. 14 (Assessment) Determine reassessment methods 2. 15 (Assessment) Determine reassessment schedule 2. 17 (Communication) 2. 16 (Decision) Are there any segments that won’t be reassessed within 5 years? Notify PHMSA and document actions taken to assure integrity and basis for variance Yes No 2. 18 (Remediation) Update assessment plan 2. 8 (Integration) Input results into risk analysis and update segment prioritization 2. 7 (Remediation) Perform necessary repairs within allowed period and document 2. 19 (Decision) Changes to HCAs? Yes Step No 3 Step 1

Hazardous Liquid Integrity Management Flowchart Step 3: Establish IM Framework and Processes Step 3 3. 1 (Integration) Develop and document an IMP framework 3. 2 (Integration) Develop the process for determining which segments can affect an HCA 3. 9 (Integration) Document IMP program description 3. 6 (Integration) Develop the process to identify any additional preventive or mitigative actions 3. 3 (Integration) Develop the process by which the risks associated with a pipeline segment will be analyzed 3. 7 (Integration) Develop the process by which periodic integrity assessments are performed 3. 4 (Integration) Develop the process by which a risk-based baseline assessment plan will be established 3. 8 (Validation) Develop the process to measure the effectiveness of the IMP 3. 5 (Integration) Develop the process for reviewing integrity assessment results and making mitigation decisions 3. 12 (Communication) Communicate program framework processes, and results to regulators and the public 3. 11 (Validation) Periodically assess and update the program procedures 3. 10 (Validation) Track IM program performance measures