U.S. Geological Survey, Branch Of Acquisition and Federal Assistance, Box 25046, Denver Federal Center, Denver, CO 80225-0046

66 -- MAP 215-50 RARE-GAS MASS SPECTROMETER WITH DUAL ELECTRON MULTIPLIERS SOL 99CRQQ0145 POC Jean Schilling 303-236-5900 (325) E-MAIL: ERROR --, jschilli@usgs.gov. DESC: Concerns having the ability to furnish the services described herein are requested to give written notification (including telephone number for a point of contact) to the procuring office above within forty-five (45) calendar days from the date of this synopsis. Salient characteristics: electron bombardment ion-source mass spectrometer, ancillary equipment, and computer software that meets minimum performance standards for computer-controlled isotopic analysis of argon isotopes. A dual-collection instrument that will use double electron multipliers for simultaneous collection of argon isotopic abundance data. This mass spectrometer system will be interfaced with a Government-supplied IBM-compatible computer and connected to laser-fusion and low-blank furnace agron extraction systems for 40AR/39AR geochronology. Based on the information abailable at this time, and in accordance with 41 U.S.C. 253(c)(1), implemented by FAR 6.302-1, the Government considers the item specified as a sole source from Mass Analyser Products Limited, Northwich, Cheshire, United Kingdom, and proposes to negotiate a contract with that firm on that basis. However, should additional sources be identified, they wil be considered. Firms who feel that they can furnish the required item or its functional equivalent (based upon the criteria specified herein) are invited to submit in writing an affirmative response to this announcement. An affirmative response would include literature, brochures and such other materials which correspond to the required items stated herein. This information will be evaluated and used to determine if competitive opportunities exist. Since no solicitation document exists, requests for such documents without accompanying information will be considered non-responsive to this request without further consideration. This notice may represent the Government's only official notice of this procurement. See Note 22 Posted 03/25/99 (W-SN312934). (0084)

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