|Exhibit 32.2                                                                                                                                                                                                                                         
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|Certification Pursuant to 18 U.S.C. Section 1350                                                                                                                                                                                                     
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|The undersigned, Arthur M. Evans, Chief Financial Officer of Tri-Valley Corporation, a Delaware corporation (the "Company"), pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes Oxley Act of 2002, hereby certifies that:
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|(1) the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2006 (the "Report") fully complies with the requirements of Section 13(a) of the Securities Exchange Act of 1934; and                                                 
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|(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.                                                                                             
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|Date:   August 9, 2006                                                                                                                                                                                                                               
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|By: | /s/ Arthur M. Evans                    
|    | Arthur M. Evans Chief Financial Officer