UNITED STATES WELDING, INC.

GASES AND SUPPLIES TO FORT COLLINS, CO

LIQUID OXYGEN FARM TANK REPAIRS

CO-FWS HOTCHKISS NFH-BULK OXYGEN THE PURPOSE OF THIS MODIFICATION, P00007, IS TO DEOBLIGATE FUNDS FROM THE PREVIOUS OPTION YEAR.

CO-FWS HOTCHKISS NFH-BULK OXYGEN MODIFICATION P00006 TO EXERCISE OPTION YEAR 3

LN2 BULK GAS

WY-COMPRESSED GAS CYLINDER PROCUREMENT

LIQUID NITROGEN SUPPLY (LN2) @ NLGRP FOR CRYOGENICS STORAGE

LIQUID NITROGEN SUPPLY (LN2) @ NLGRP FOR CRYOGENICS STORAGE

CO-HOTCHKISS NFH-VALVE REPAIR OXYGEN

WY-COMPRESSED GAS CYLINDER PROCUREMENT

CO-FWS HOTCHKISS NFH-BULK OXYGEN MODIFICATION 00004 TO DE-OBLIGATE REMAINING FUNDS FROM OPTION PERIOD 1.

BULK LIQUID NITROGEN

WY-COMPRESSED GAS CYLINDER PROCUREMENT

SUPPLY APPROXIMATELY 100,000 CCF OF TYPE II CLASS B 99.9998% PURE NITROGEN BY VOLUME.

CO-FWS HOTCHKISS NFH-BULK OXYGEN MODIFICATION 00003 EXERCISE OPTION YEAR TWO (2)

LN2 GAS BULK ORDERING

TYPE II CLASS B 99.9998% PURE NITROGEN

LIQUID NITROGEN SYSTEM REPAIRS

BULK LN2

CO-FWS HOTCHKISS NFH-BULK OXYGEN MODIFICATION 0002 TO ADD ADDITIONAL FUNDING TO BASE YEAR AND EXERCISE OPTION YEAR ONE (1)