Crude Oil Supply

March 2010 Crude Oil Price Bulletin

Bulletin
Number

Effective
Date

ND
Williston Basin
Sour

ND
Williston Basin
Sweet

TX
West
Intermediate

03/01/2010

66.75

60.50

75.25

03/02/2010

67.75

61.50

76.25

03/03/2010

68.75

62.50

77.25

03/04/2010

68.25

62.00

76.75

03/05/2010

69.50

63.25

78.00

03/08/2010

69.75

63.50

78.25

03/10/2010

70.00

63.75

78.50

EDQ

62.7

68.95

77.45

Gravity Adjustment

1 Less $0.015/bbl for each .1 degree API above 44.9 degrees API. Less $0.02/bbl for each full
degree API below 40.9 degrees API.

2 Less $0.015/bbl for each .1 degree API above 44.9 degrees API. Less $0.10/bbl for each full
degree API below 40.9 degrees API.