Exhibit
31.2
 
 Certification
 
 I, Arthur
M. Evans, certify that:
 
 1.         
   I have reviewed this report on Form 10-Q/A of Tri-Valley
Corporation;
 
 2.          
  Based on my knowledge, this report does not contain any untrue
statement of a material fact or omit to state a material fact necessary to make
the statements made, in light of the circumstances under which such statements
were made, not misleading with respect to the period covered by this
report;
 
 3.           
 Based on my knowledge, the financial statements and other financial
information included in this report fairly present, in all material respects,
the financial condition, results of operations and cash flows of registrant as
of, and for, the periods presented in this report;
 
 4.           
 The registrant’s other certifying officer and I are responsible for
establishing and maintaining disclosure controls and procedures (as defined in
the Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over
financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)
for registrant and have:
 
 a.           designed
such disclosure controls and procedures, or caused such disclosure controls and
procedures to be designed under our supervision, to ensure that material
information relating to registrant including its consolidated subsidiaries, is
made known to us by others within those entities, particularly during the period
in which this report is being prepared;
 
 b.           designed
such internal control over financial reporting, or caused such internal control
over financial reporting to be designed under our supervision, to provide
reasonable assurance regarding the reliability of financial reporting and the
preparation of financial statements for external purposes in accordance with
generally accepted accounting principles;
 
 c.           evaluated
the effectiveness of registrant’s disclosure controls and procedures and
presented in this report our conclusions about the effectiveness of the
disclosure controls and procedures, as of the end of the period covered by this
report based on such evaluation; and
 
 d.           disclosed
in this report any change in registrant’s internal control over financial
reporting that occurred during the small business issuer’s most recent fiscal
quarter (registrant’s fourth fiscal quarter in the case of an annual report)
that has materially affected, or is reasonably likely to materially affect,
registrant’s internal control over financial reporting; and
 
 5.           
 The registrant’s other certifying officer and I have disclosed, based on
our most recent evaluation of internal control over financial reporting, to our
auditors and the audit committee of registrant’s board of
directors:
 
 a.           all
significant deficiencies in the design or operation of internal control over
financial reporting which are reasonably likely to adversely affect registrant’s
ability to record, process, summarize and report financial information;
and
 
 b.           any
fraud, whether or not material, that involves management or other employees who
have a significant role in registrant’s internal control over financial
reporting.
 
 
 Date:  November
      5, 2008
                    By:
                    /s/Arthur
      M. EvansArthur
      M. Evans, Chief Financial
Officer