Operational Contracting Office, 8110 Industrial Dr., Suite 200, USAF Academy, CO 80840-2315

Z -- FIVE YEAR OPEN-END IDIQ A-E CONTRACT FOR ENVIRONMENTAL SERVICES POC Contact Kathleen A. Edenborough, Contracting Officer, (719)333-4740 CNT F0561198D0227 AMT $5,000,000 LINE 0001 DTD 111797 TO CH2M Hill, Inc., 6060 S. Willow Drive, Greenwood Village CO 80111-5142 (0322)

Loren Data Corp. http://www.ld.com (SYN# 0294 19971121\Z-0001.AWD)