EXHIBIT 10.11 JAMISON BUILDING LEASE ADDENDUM 10-1-01 SUITE NO: 101, 201, and 207 LANDLORD: BRUCE RHINE TENANT: ASTI Operating Company, Inc. Existing lease is hereby extended 12 months beginning October 1, 2001 and ending September 30, 2002. The new rental rate will be $3,595.99 per month. All other terms and conditions of the lease will remain the same. LANDLORD: By: /s/ Bruce Rhine Date: 9/17/01 -------------------------- Bruce Rhine TENANT: ASTI Operating Company, Inc. By: /s/ Bette D. Butler Date: 9/17/01 -------------------------- Bette D. Butler, Controller PAGE 1