PHILLIPS 66 COMPANY - SWEENY REFINERY — Integrity Assurance Notification

PROGRAMPer P66 Gas Integrity Management Program and as required by 192.909, this email is notification to PHMSA that Phillips 66 has made a substantive change in its Texas Gas Transmission Integrity Management Program. Effective October 24, 2025, a revision was made to transition selected intrastate gas transmission pipelines in Texas to follow a risk-based assessment program under 16 TAC 8.101. Two pipelines under OPID 31130 are affected by this change, however Phillips 66 may, in the future, add additional intrastate gas transmission pipelines located in Texas to the risk-based assessment program. These program changes apply to the following operating IDs and entities: • 31684 Phillips 66 Pipeline LLC • 31130 DCP Midstream LP • 15485 Philipps 66 Company Sweeney Refinery • 40321 Phillips 66 Dos Picos LLC • 30952 Phillips Utility Gas Corporation#