November 21, 2008    . Soil Rock Geosynthetic Field TGG is dedicated to providing rapid turn around of results without compromise to quality. All testing is performed under either ASTM or U.S. Army Corps of Engineering Standards. TGG's Soil Laboratory is fully equipped to handle your soil, rock and geosynthetic materials testing. Contact us for a price list. top of page Home    Geotechnical    Environmental    Soils Lab    Mission   Vision The Geotechnical Group, Inc.    TGG Environmental, Inc. 100 Crescent Road, Needham, MA 02494 tel: 781.449.6450 fax: 781.449.1283 Copyright © 2002 The Geotechnical Group, Inc. All rights reserved.