North America Crude Oil Marketing - May 2001 Summary California Bulletins 01-CA28 to 01-CA31, with Monthly Averages

Chevron has changed its posted prices as shown below: Effective 7:00 AM on the above listed effective date, subject to change without notice, Chevron will pay the following prices per barrel for crude oil and condensate delivered for its account into the custody of its authorized carrier or receiving agent. Prices are subject to deduction for transportation and other charges where applicable. Prices for oil apply to quantities measured by approved automatic custody transfer facilities or 100% tank table with customary adjustment of volume and gravity for temperature and full deduction for sediment and water.

* Prices are subject to a Gravity Adjustment Scale

California	API	CA28 05/08	CA29 05/09	CA30 05/18
Asphalto		24.85	25.50	26.50
Belridge Hvy (under 28�)		21.40	21.70	22.70
Belridge Lt (over 28�)		24.65	25.25	26.25
Buena Vista Hills		23.70	24.20	25.20
Cal Canal		25.70	26.35	27.35
Coalinga		21.70	22.00	23.00
Cymric		21.05	21.30	22.30
Huntington Beach		22.30	22.60	23.60
Kern River		21.25	21.50	22.50
Kettleman Hills		25.10	25.75	26.75
Lost Hills		24.60	25.20	26.20
McKittrick		21.25	21.50	22.50
Midway Sunset		21.25	21.50	22.50
Montebello		23.20	23.60	24.60
Pt Arguello (onshore)		17.90	18.15	19.15
Railroad Gap		24.75	25.35	26.35
Seal Beach		24.15	24.70	25.70

California	API	CA31 05/24		Mthly Avg
Asphalto		25.75		25.6806
Belridge Hvy (under 28�)		21.95		22.0500
Belridge Lt (over 28�)		25.50		25.4548
Buena Vista Hills		24.45		24.4419
Cal Canal		26.60		26.5194
Coalinga		22.25		22.3500
Cymric		21.55		21.6742
Huntington Beach		22.85		22.9274
Kern River		21.75		21.8629
Kettleman Hills		26.00		25.9194
Lost Hills		25.45		25.4048
McKittrick		21.75		21.8629
Midway Sunset		21.75		21.8629
Montebello		23.85		23.8790
Pt Arguello (onshore)		18.40		18.5129
Railroad Gap		25.60		25.5435
Seal Beach		24.95		24.9177

Note: Prices in $/bbl

Measurement The prices are based upon computation of quantities by mutually acceptable automatic measuring equipment in accordance with the latest ASTM Standards and API Manual of Petroleum Measurement Standards (MPMS) generally accepted in the petroleum industry with deductions for full sediment, water and other impurities.