NASA/George C. Marshall Space Flight Center, Procurement Office, Marshall Space Flight Center, AL 35812

66 -- GOW-MAC 580 GAS CHROMOTOGRAPH (OR EQUIVALENT) SOL 8-1-9-ED-C4174 DUE 071699 POC Gloria J. Coffey, Contract Specialist, Phone (256) 544-9187, Fax (256) 544-8688, Email gloria.coffey@msfc.nasa.gov -- David. G. Morgan, Contracting Officer, Phone (256) 544-0410, Fax (256) 544-8688, Email david.morgan@msfc.nasa.gov WEB: Click here for the latest information about this notice, http://nais.nasa.gov/EPS/MSFC/date.html#8-1-9-ED-C4174. E-MAIL: Gloria J. Coffey, gloria.coffey@msfc.nasa.gov. The purpose of this amendment is to provide concentration levels on Line Item 1 of this solicitation. Accordingly, the following information is furnished: The following are the concentrations we need to be able to detect: Oxygen in Nitrogen: 50PPM Oxygen in Helium: 1PPM Oxygen in Hydrogen: 1PPM Nitrogen in Argon: 5PPM Nitrogen in Helium: 1PPM Nitrogen in Hydrogen: 5PPM THE CLOSING DATE OF CLOSE OF BUSINESS, JULY 16, 1999, REMAINS UNCHANGED AS A RESULT OF THIS AMENDMENT. Posted 07/12/99 (D-SN353075). (0193)

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