MGC PURE CHEMICALS AMERICA INC. MARICOPA COUNTY-TAX CONCURRENCE LETTER NO LETTERHEAD 11.05.2025 FINAL.DOCX

Ms. Elizabeth Whiteman
Executive Secretary 
Foreign-Trade Zones Board
U.S. Department of Commerce
1401 Constitution Avenue, NW, Room 21013
Washington, D.C. 20230
November 5th, 2025
Re: 
MGC Pure Chemicals America, Inc. for FTZ Subzone Property Tax Concurrence 
“No Objection” 
Dear Ms. Whiteman:
The undersigned being a duly authorized representative of Maricopa County does hereby 
acknowledge that Maricopa County has no-objection to the proposed Foreign Trade Zone 
(FTZ) Subzone and property tax reclassification of all future real and personal property 
for MGC Pure Chemicals America, Inc. to be located at 6560 South Mountain Rd., Mesa, 
Arizona 85212, parcels 304-34-037A, 304-34-035B, 304-34-037C, 304-34-037D and 
304-34-037E, within Foreign Trade Zone No. 221.  
In particular, we understand the Foreign Trade Zone Subzone designation and resulting 
tax implications in reclassifying for property tax purposes. MGC Pure Chemicals America, 
Inc. real and personal property located at the site referenced above is requesting to be 
eligible to receive the Class 6 assessment ratio of 5% in correspondence with the creation 
of their Foreign Trade Zone Subzone. Maricopa County expresses “no-objection” to the 
FTZ designation and proposed property tax reclassification contemplated herein.
Sincerely,
Chairman Thomas Galvin
Board of Supervisors
Maricopa County
 __________________________________
Clerk of the Board