Agents, Engineering Firm, & Fabrication

         Ensco Engineering Sales Company
         6622 E. Cornell Avenue
         Denver, CO  80224
         303-758-4465 (FAX -759-8717)
         email: donensco@ix.netcom.com
         (no web site)

         Dennis Weaver & Associates
         1344 Wilkshire Circle, S.W.
         North Canton, OH  44720-4160
         330-499-1779 (FAX -0916)
         email: dweaver@dwaassoc.com
         web site: http://www.dwaassoc.com

         Kenning FilterSource  
         Phone : 800-701-8038
         Fax : 970-204-4764
         Location: Fort Collins, CO
         Hours: 8-12, 1-5 (Mountain Time) Mon-Fri
         Email : info@kenningfilter.com
         http://www.kenningfilter.com/index.html

         New Century Engineering
         1550 E. Virginia Drive
         Midland, MI  48642
         989-633-3331, ext 21 (FAX -3334)
         email: kgrakauskas@newcenturyeng.com
         (no web site)

Fabrication

         Gladwin Tank Manufacturing, INC.
         207 Industrial Drive
         Gladwin, Mi  48624
         Phone (989) 426-4768
         Fax (989) 426-2777
         email: gladwintank@ejourney.com
         web site: http://www.gladwintank.com