USDA, APHIS, Field Servicing Office, Butler Square West, 5th Floor, 100 North 6th St., Minneapolis, MN 55403

99 -- LABORATORY GRADE GASES SOL 32-M-APHIS-98 DUE 121597 POC Jeanne V. Lewis @ 612/370-2109. E-MAIL: A. Walker, awalker@usda.gov. SCHEDULE OF ITEMS Item Supplies/Services Estimated Unit Unit No. Quantity Price 1 Methane, 5% Aron 95% 292 6 Packs __ ___ (99.999%) UN1956 (20) 2 Methane, 5% Argon 95% 50 Singles __ ___ (99.999%) UN1956 3 Methane Ultra Pure 290 Singles __ ___ (99.99%) 4 Air instrument, UN1002 250 Singles __ ___ 1 <ppm THC; <3ppm H2O 5 Air instrument, UN1002 24 6 Packs __ ___ <1 ppm THC; <3 ppm H2O 6 Nitrogen (99.999%) 20 Singles __ ___ UN1066 7 Nitrogen (99.999%) 116 6 Packs __ ___ UN1066 8 Carbon Dioxide Liquified 13 6 Packs __ ___ UN1013 Govt.-owned cylinders 9 Hydrogen (99.99%) 12 Singles __ __ 10 Hydrogen 99.99% purity 68 Singles __ ____ grade 4.7 11 Oxygen 99.99% purity 371 Singles -- -- -- grade 4.7 12 Liquid Nitrogen Tank 93 Singles __ ____ 180 liters 99.99% purity or better Monthly demurrage (rental) on all cylinders __ ___ 6 packs and 12 packs. Monthly rental includes pickup and delivery of empty cylinders by the Contractor. (0300)

Loren Data Corp. http://www.ld.com (SYN# 0275 19971029\99-0001.SOL)