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Electric Utility Best Practices PCB Voluntary Accelerated ...

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Electric Utility Best Practices PCB Voluntary Accelerated ...

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    1. Electric Utility Best Practices PCB Voluntary Accelerated Removal Program Alan Leung Unnamed Utility Co. email July 12, 2006 NWPPA, Vancouver, WA

    2. July 12, 2006 PCB VAR-Utility Best Practices 2

    3. July 12, 2006 PCB VAR-Utility Best Practices 3 PCB Removal Program Highlights PCB Removal Program established 1981. Distribution Capacitors removed from 1981 to 1984, four years ahead of EPA deadline. Cost: $70 million. Network transformers: completed replacement of 983 PCB transformers in March 1986. Cost: $55 million. Replaced/retrofilled >500 ppm PCB transformers near food/feed facilities prior to October 1985. Series capacitor banks removed at 4 major transmission (500kV) substations; project completed in 2005. 15,000 capacitors removed. Cost: $78 million.

    4. July 12, 2006 PCB VAR-Utility Best Practices 4 Current PCB Removal Program Approximately 40,000 distribution transformers are tested annually. Distribution equipment with >50 ppm PCB are replaced or refilled. Substation equipment* testing program established PCB concentrations since 1980’s. Equipment with >500 ppm PCB are replaced or retrofilled. <500 ppm PCB equipment may also be retrofilled based on oil quality. Therefore, very few >500 ppm transformers registered in EPA database. *Some equipment not testable, e.g. bushings, PTs, are managed according to TSCA assumption rule.

    5. July 12, 2006 PCB VAR-Utility Best Practices 5 Identifying Suspect PCB Equipment Oil Analysis All testable substation equipment Distribution equipment when accessed for maintenance, repairs, etc. Manufacturers’ Identification “Blue Sticker” Serial Numbers may be used to determine manufacture date and location; correlate with PCB use information from manufacturer. “Untestable” would include bushings, sealed eqt., some capacitors, difficult access or outage required.“Untestable” would include bushings, sealed eqt., some capacitors, difficult access or outage required.

    6. July 12, 2006 PCB VAR-Utility Best Practices 6 Removal Prioritizing Criteria PCB Concentration >500 ppm 50-499 ppm Location and Access Wetlands, sensitive receptors, unrestricted access Equipment Performance Oil Quality Testing Program, e.g. moisture, dissolved gas, etc.

    7. July 12, 2006 PCB VAR-Utility Best Practices 7 Implementation of Removal Process Distribution equipment annual replacement program budgeted. For major replacement projects, incorporate into capital improvement program. Transformer repair facility in-house. Oil to TSDF for incineration. Metal salvaging for large equipment whenever possible.

    8. July 12, 2006 PCB VAR-Utility Best Practices 8 Future of PCB Removal Obtain nameplate information for distribution transformers and incorporate into GIS. Targeted removal of PCB transformers. Encourage EPA to review customer-owned transformers.

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