Press Release Source: TGC Industries, Inc.

TGC Industries to Present at the Oppenheimer Oil Services & Equipment Investor Conference.

PLANO, Texas, Aug. 8 /PRNewswire-FirstCall/ -- TGC Industries, Inc. (Amex: TGE) today announced that the company will participate in the Oppenheimer Oil Services & Equipment Investor Conference to be held at the Hilton Financial District in Boston on Thursday, August 10, 2006.

Wayne Whitener, President and Chief Executive Officer, is scheduled to present on Thursday, August 10, 2006 at 1:30 p.m. eastern time. The presentation will be broadcast live over the Internet, and the live web cast link will be available on the company's website at http://www.tgcseismic.com and will be archived there for replay.

TGC Industries, Inc., based in Plano, Texas, with a branch office in Houston, is one of the leading providers of seismic data acquisition services throughout the continental United States.

CONTACTS:
Wayne Whitener
Chief Executive Officer
TGC Industries
(972) 881-1099

Jack Lascar, Partner
Karen Roan, SVP
DRG&E (713) 529-6600

SOURCE: TGC Industries, Inc.