JOINT FILER INFORMATION

 

Name:	Occidental C.O.B. Partners
Address:	110 West 7th Street P.O. Box 300 Tulsa, Oklahoma 74102
Designated Filer:	Occidental Petroleum Corporation
Issuer & Ticker Symbol:	Premcor Inc. (PCO)
Date of Event Requiring Statement:	01/06/2004
Signature:	OCCIDENTAL C.O.B. PARTNERS by OXY USA Inc., its managing partner
	By:	/s/ STEPHEN I. CHAZEN
		Stephen I. Chazen Executive Vice President

Page 3 of 7

JOINT FILER INFORMATION

 

Name:	Placid Oil Company
Address:	10889 Wilshire Boulevard Los Angeles, California 90024
Designated Filer:	Occidental Petroleum Corporation
Issuer & Ticker Symbol:	Premcor Inc. (PCO)
Date of Event Requiring Statement:	01/06/2004
Signature:	PLACID OIL COMPANY
	By:	/s/ STEPHEN I. CHAZEN
		Stephen I. Chazen Executive Vice President

Page 4 of 7

JOINT FILER INFORMATION

 

Name:	OXY USA Inc.
Address:	5 Greenway Plaza Houston, Texas 77046
Designated Filer:	Occidental Petroleum Corporation
Issuer & Ticker Symbol:	Premcor Inc. (PCO)
Date of Event Requiring Statement:	01/06/2004
Signature:	OXY USA INC.
	By:	/s/ STEPHEN I. CHAZEN
		Stephen I. Chazen Executive Vice President

Page 5 of 7

JOINT FILER INFORMATION

 

Name:	Occidental Oil and Gas Holding Corporation
Address:	10889 Wilshire Boulevard Los Angeles, California 90024
Designated Filer:	Occidental Petroleum Corporation
Issuer & Ticker Symbol:	Premcor Inc. (PCO)
Date of Event Requiring Statement:	01/06/2004
Signature:	OCCIDENTAL OIL AND GAS HOLDING CORPORATION
	By:	/s/ STEPHEN I. CHAZEN
		Stephen I. Chazen Executive Vice President

Page 6 of 7

JOINT FILER INFORMATION

 

Name:	Occidental Petroleum Investment Co.
Address:	10889 Wilshire Boulevard Los Angeles, California 90024
Designated Filer:	Occidental Petroleum Corporation
Issuer & Ticker Symbol:	Premcor Inc. (PCO)
Date of Event Requiring Statement:	01/06/2004
Signature:	OCCIDENTAL PETROLEUM INVESTMENT CO.
	By:	/s/ J.R. HAVERT
		J. R. Havert Vice President and Treasurer

Page 7 of 7