PLEASE CONTACT US using the contact information listed below:

David G. Boyle Technical Director dboyle@chemstar.pro Conrad Gagnon District Manager — Baltimore, MD Cell: (410) 458-1308 cgagnon@chemstar.pro Al Zdilla Senior Sales Manager Cell: (410) 746-1763 azdilla@chemstar.pro Bryan Deal Technical Service Rep Cell: (443) 417-7954 bdeal@chemstar.pro Tom Duffey Technical Service Rep Cell: (301) 575-6190 tduffey@chemstar.pro

Pamela Shaw Office Manager pshaw@chemstar.pro Dave Vodvarka District Manager — Washington, DC Cell: (703) 328-1173 davev@chemstar.pro Thomas Jackson Technical Service Rep Cell: (410) 218-9154 tjackson45@verizon.net Sylvester Dale Technical Service Rep Cell: (410) 218-0504 sdale@chemstar.pro