Summit Alarm Systems, Inc.
Pete Snodgrass
Pete@SummitAlarms.com
(713) 776-8328
8950 Westpark, Suite 104
Houston, Texas  77063

TERRA Engineering Group Corp.
Santos Munoz
sjmunoz@tegc-corp.com
PO Box 993
Fulshear, Texas  77441-0993
www.terraengineering.com

DIFFCO, LLC
Bain McCleney
bain@diffcollc.com
(832) 671-2865
P. O. Box 178
Cypress, Texas 77410
www.diffcollc.com