Tri-Valley Promotes Three Subsidiary Officers

BAKERSFIELD, Calif.--(Business Wire)--
Tri-Valley Corporation (AMEX:TIV) has promoted three of its
Tri-Valley Oil & Gas Co. subsidiary officers to support its expanding
petroleum and mineral exploration and production projects.

Joseph R. Kandle, former president and chief operating officer of
Tri-Valley Oil & Gas Co., has been promoted to senior vice president
of corporate development of the publicly traded parent, Tri-Valley
Corporation. He will oversee expansion of the largest oil and gas
projects and evaluate and negotiate new opportunities for the
Corporation and its subsidiaries. Kandle laid the foundation for the
current asset development programs. He continues as president of Great
Valley Drilling Co. LLC based in Fallon, Nevada which drills both
petroleum and geothermal wells.

Robert A. Bell will succeed Kandle as president and chief
operating officer of Tri-Valley Oil & Gas Co. As the former vice
president of operations, he leads the team that is ramping up
production, so far several months ahead of plan this year, and will
continue that toward achieving the new goal of at least 3,000 barrels
of oil equivalent per day by December 31, 2008. Mr. Bell also becomes
president of Great Valley Production Services LLC which just sold its
production rigs and equipment to Excalibur Well Services, Inc in a
well service alliance preferred client arrangement. However, GVPS
retained its fleet of 17 portable steam generators for enhanced heavy
oil recovery.

James G. Bush, former vice president of exploration for Tri-Valley
Oil & Gas Co., becomes the president of Select Resources Corporation
with the mandate to accelerate the exploitation of the subsidiary's
two large gold exploration projects and activate the super high
quality Calder calcium carbonate mine. All three properties are in
Alaska.

Petroleum exploration will be handled by the existing petroleum
geological team of Paul Hacker and Myron Tiede.

"These promotions enable greater management focus on our asset
inventory, operations and opportunities to build Company production,
revenue, reportable reserves, share value and reward for our project
partners as well as cross train our staff for greater utility as we
grow," said F. Lynn Blystone, president and chief executive officer of
the parent, Tri-Valley Corporation.

Blystone noted Tri-Valley's ongoing expansion of producing
properties, increasing production and goals being reached ahead of
plan during a period of record prices in petroleum and stable high
prices for gold and industrial minerals call for continued
strengthening in the management platform to maintain an accelerated
pace to grow value.

Tri-Valley has been in business as a successful operating company
since 1963, and has been a full reporting 12 (g) publicly traded
Delaware Corporation since 1972. Tri-Valley Corporation stock is
publicly traded on the American Stock Exchange under the symbol "TIV."
Our company website, which includes all SEC filings, is
www.tri-valleycorp.com.

This press release contains forward-looking statements that
involve risks and uncertainties. Actual results, events and
performance could vary materially from those contemplated by these
forward-looking statements which includes such words and phrases as
exploratory, wildcat, prospect, speculates, unproved, prospective,
very large, expect, potential, etc. Among the factors that could cause
actual results, events and performance to differ materially are risks
and uncertainties discussed in the company's quarterly report on Form
10-Q for the quarter ended March 31, 2008, and the annual report on
Form 10-K for the year ended December 31, 2007.

Tri-Valley Corporation
Egan Gost, Director of Public and Investor Relations
1-800-579-9314
information@tri-valleycorp.com
www.tri-valleycorp.com

Copyright Business Wire 2008