HSC/PKV, 3207 North Road, Brooks AFB, TX 78235-5363

F -- WORLDWIDE FULL SERVICE ENVIRONMENTAL REMEDIAL EFFORTS WITH PARTIAL SMALL BUSINESS SET ASIDE POC Ms. Sathedia Bush, Contracting Officer, (210)536-4228 CNT F41624-97-D-8009, F41624-97-D-8010, and F41624-97-D-8011 AMT $475,000,000.00 total aggregate program value DTD 041098 TO Environmental Chemical Corp, 1240 Bayshore Hwy., Burlingame CA 94010, CET Environmental Service Inc. 120 West Dayton, Suite A-7, Edmonds, WA, 98020-4180, Versar Inc., 6850 Versar Center, Springfield, VA 22151 (0104)

Loren Data Corp. http://www.ld.com (SYN# 0295 19980416\F-0004.AWD)