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BUILDING TECHNOLOGY ASSOCIATES, INC.

Zak Alzught

Bob Beauregard

(248) 967-4600

21850 Greenfield Road
Oak Park, MI 48237

DETROIT ROOFING INSPECTION SERVICE

Timothy Riha

586-759-2143

PO Box 99700
Troy, MI 48099

NTH CONSULTANTS, LTD.

Richard A. Bresso, P.E., RRC

Thomas W. Mitchell

248-553-6300

248-324-5179 (Fax)

41780 Six Mile Road
Northville, MI 48168

ROOF DESIGN SOLUTIONS LLC

Jeff Scott

810-734-1756

1100 Mill Street
Algonac, MI 48001