EQUIVA TRADING COMPANY August 9, 2002 DEREK RESOURCES CORP WIRE PAYMENT 335 BURRARD ST STE 1730 VANCOUVER BC CANADA V6C2G8, 1-0 Dear Sir or Madam: Re: Change In Posted Price You were recently sent a Contract Assignment from Equiva Trading Company (ETCO) to Shell Trading (US) Company (STUSCO) effective September 1, 2002. August 31, 2002 will be the last day Equiva Trading Company will post for crude oil, and effective September 1, 2002, STUSCO will commence posting for crude oil. Accordingly, we would appreciate your acknowledgement of the change of posted prices on crude contracts (listing[s] enclosed) from ETCO to Shell Trading (US) Company effective September 1, 2002. We would appreciate receiving your response by returning a signed copy of this letter, either by mail or fax to (713) 246- 8674 within ten days from the date of this letter. If we do not receive your response within ten days, we will assume your consent to the change of posted prices. Thank you for your cooperation. Sincerely, /s/ Matt McComiskey --------------- Matt McComiskey Vice President Attachments Crude Contract Numbers: 98679R01 This will acknowledge the change of posted prices on our contracts that were assigned from Equiva Trading Company to Shell Trading (US) Company: By: /s/ Frank Hallam Title: CFO Date: August 29/02