General Services Administration, Federal Supply Service (FSS), Management Services Center (10FT), 400 15th Street, SW,, Auburn, WA, 98001

B -- ENVIRONMENTAL ADVISORY SERVICES, TFTP-SW-98-8999-B POC Barbra Weitzel, Contract Specialist, Phone (253) 931-7932, Fax (253) 931-7174, Email barbra.weitzel@gsa.gov -- Barbra Weitzel, Contract Specialist, Phone (253) 931-7932, Fax (253) 931-7174, Email CNT GS-10F-0076K AMT $3,500,000 LINE 899-1, 899-2, 899-3, 899-4 DTD 122199 TO TETRA TECH EM,INC., 1881 CAMPUS COMMONS DRIVE, SUITE 200, RESTON, VA 20191 WEB: Visit this URL for the latest information about this, http://www.eps.gov/cgi-bin/WebObjects/EPS?ACode=A&;ProjID=GS-10F-0076K& LocID=8. E-MAIL: Barbra Weitzel, barbra.weitzel@gsa.gov. Posted 12/21/99 (D-SN410654). (0355)

Loren Data Corp. http://www.ld.com (SYN# 0271 19991223\B-0002.AWD)