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Asset Appendix Report

: Westlake Natrium LLC : C011810
: 10816 : 1399930
: : 3/29/2023
:
Generation Assets
ID Filing Entity
and its Energy Affiliates		 Docket Number
Where MBR Granted		 Generation
Name		 Owned
By		 Controlled
By		 Date Control
Transferred		 Market / Balancing
Authority Area		 Geographic
Region		 In-Service
Date		 Plant Code Generator ID Unit Code Amount Attributed to
Entity and Affiliates		 Capacity Rating
Used in Filing (MW)		 Capacity Rating Methodology Used:
Nameplate, Seasonal, 5-yr Unit,
5-yr EIA, Alternative		 End Note Number
(Enter text in End Note Tab)
Westlake Natrium LLC ER13-2350-000 RS Cogen 12/1/2002 EES Southwest 2002-12 55117 RS-4 CC1 51.50 103.00 RS Cogen, LLC, owns 50% of the unit.
Westlake Natrium LLC ER13-2350-000 RS Cogen 12/1/2002 EES Southwest 2002-12 55117 RS-5 CC1 97.50 195.00 RS Cogen, LLC, owns 50% of the unit.
Westlake Natrium LLC ER13-2350-000 RS Cogen 12/1/2002 EES Southwest 2002-12 55117 RS-6 CC1 97.50 195.00 RS Cogen, LLC, owns 50% of the unit.
Westlake Natrium LLC ER17-1442-000 Axiall Plaquemine 8/31/2016 MISO Central 1997-05 55051 X773 88.66 88.66
Westlake Natrium LLC ER17-1442-000 Axiall Plaquemine 8/31/2016 MISO Central 1997-05 55051 X774 88.66 88.66
Westlake Natrium LLC ER17-1442-000 Axiall Plaquemine 8/31/2016 MISO Central 1997-05 55051 X775 88.66 88.66
Westlake Natrium LLC ER23-277-002 PPG Powerhouse C 9/30/2022 MISO Central 1977-08 50489 C1 PHC 73.10 73.10 The owner and operator, Eagle US 2 LLC, had a name change to Westlake US 2 LLC. The Relationship Start Date reflects the beginning of the relationship with the CID for the name-changed entity.
Westlake Natrium LLC ER23-277-002 PPG Powerhouse C 9/30/2022 MISO Central 1977-09 50489 C3 PHC 57.10 57.10 The owner and operator, Eagle US 2 LLC, had a name change to Westlake US 2 LLC. The Relationship Start Date reflects the beginning of the relationship with the CID for the name-changed entity.
Westlake Natrium LLC ER23-277-002 PPG Powerhouse C 9/30/2022 MISO Central 1978-06 50489 C2 PHC 73.10 73.10 The owner and operator, Eagle US 2 LLC, had a name change to Westlake US 2 LLC. The Relationship Start Date reflects the beginning of the relationship with the CID for the name-changed entity.
Westlake Natrium LLC ER23-277-002 PPG Powerhouse C 9/30/2022 MISO Central 1986-08 50489 C4 PHC 77.20 77.20 The owner and operator, Eagle US 2 LLC, had a name change to Westlake US 2 LLC. The Relationship Start Date reflects the beginning of the relationship with the CID for the name-changed entity.
Westlake Natrium LLC ER23-277-002 PPG Powerhouse C 9/30/2022 MISO Central 1986-08 50489 C5 PHC 77.20 77.20 The owner and operator, Eagle US 2 LLC, had a name change to Westlake US 2 LLC. The Relationship Start Date reflects the beginning of the relationship with the CID for the name-changed entity.
Westlake Natrium LLC ER23-277-002 RS Cogen 1/31/2023 EES Southwest 2002-12 55117 RS-4 CC1 103.00 103.00 Former owner and operator RS Cogen, LLC has been merged into Westlake US 2 LLC. The Relationship Start Date reflects the beginning of the relationship with the CID for Westlake US 2 LLC (note, however, that RS Cogen, LLC was previously owned by Westlake US 2 LLC prior to the merger).
Westlake Natrium LLC ER23-277-002 RS Cogen 1/31/2023 EES Southwest 2002-12 55117 RS-5 CC1 195.00 195.00 Former owner and operator RS Cogen, LLC has been merged into Westlake US 2 LLC. The Relationship Start Date reflects the beginning of the relationship with the CID for Westlake US 2 LLC (note, however, that RS Cogen, LLC was previously owned by Westlake US 2 LLC prior to the merger).
Westlake Natrium LLC ER23-277-002 RS Cogen 1/31/2023 EES Southwest 2002-12 55117 RS-6 CC1 195.00 195.00 Former owner and operator RS Cogen, LLC has been merged into Westlake US 2 LLC. The Relationship Start Date reflects the beginning of the relationship with the CID for Westlake US 2 LLC (note, however, that RS Cogen, LLC was previously owned by Westlake US 2 LLC prior to the merger).
Westlake Natrium LLC PPG Natrium Plant 1/1/1960 PJM Northeast 1943-01 50491 GEN3 7.50 7.50
Westlake Natrium LLC PPG Natrium Plant 1/1/1960 PJM Northeast 1943-01 50491 GEN4 7.50 7.50
Westlake Natrium LLC PPG Natrium Plant 1/1/1960 PJM Northeast 1954-01 50491 GEN6 26.00 26.00
Westlake Natrium LLC PPG Natrium Plant 1/1/1960 PJM Northeast 1966-01 50491 GEN7 82.00 82.00
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