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

66 -- DUAL INLET SYSTEM INCLUDING CHANGEOVER VALVE SOL 00CRQQ0239 DUE 072400 POC Robert C. Valdez, (303) 236-5900 ext 424 Concerns having the ability to furnish the following Dual Inlet System including changeover valve described herein are requested to give written notification (including the telephone number for a point of contact) to the procuring office above within forty-five (45) calendar days from the date of this synopsis. The following Salient Characteristics are considered essential to this requirement. The U.S. Geological Survey, Crustal Imaging and Characterization Team, Geochemical and Stable Isotopes Project has a requirement for a Dual Inlet System with a changeover valve to attach to an existing Finnigan Delta Plus XL mass spectrometer made by ThermoQuest Corporation. The USGS shall require an all metal dual viscous flow gas inlet system with variable volume bellows for sample and standard gases that can be fully integrated into our existing Finningan Delta Plus XL with no increase in footprint. Bellows for both standard and sample operate automatically or manually and are adjustable between 3 and 40 ml volume; The waste line is pumped by a 60/l/s turbo molecular pump; Independent all-metal pressure transducers for both sample and standard gases are provided; Heatable up to 90 degrees Celsius for low memory; Changeover valves are mounted directly on top of the ion source manifold to minimize changeover volumes; Integrated heating for all values and capillaries and integrated pressure readout on both the sample and standard side must be provided; The values shall have extremely low dead volumes and negligible memory; Operates on the existing Finnigan software and shall have the dimensions and design to the attached to the Finningan Delta Plus XL mass spectrometer in such a way as to accommodate the existing continuous flow system. This system is used to prepare large numbers of small water, hydrous mineral, carbonate sulfur bearing and organic matter samples for automated isotopic analyses of hydrogen, oxygen, carbon, and sulfur. The Dual Inlet is required to minimize the consumption of very expensive standardsthe analyses. The project operates a major stable isotope laboratory that supports many studies with scientist in MRP and through out the Division. The mass spectrometer is used for automated hydrogen, and oxygen isotopic analyses of carbonates, sulfur isotopic analyses or organic matter and sulfur bearing minerals, and hydrogen and oxygen isotopic analyses of waters an hydrous minerals. This mass spectrometer is connected to a Gas-Bench II interface sample preparation device with an auto sampler and a liquid injector that attaches to a Carolo Erba helium flow combustion and TC/EA pyrolysis unit. These devices for a sample preparation system which attaches to a Finnigan Delta Plus XL and which operates under Finnigan software. Standards are presently obtained by continuous flow from tanks of H2, CO, SO2, N2 and CO2. These standards must be isotopically similar to samples, a requirement which mandates that some be specially manufactured. Equipment is located at U.S. Geological Survey, Denver Federal Center, Denver, CO. Based on information available at this time, and in accordance with 41 U.S.C. 253 (1), implemented by FAR 6.302-1, the Government considers the item specified as a sole source from Finnigan Mat, San Jose, CA and proposes to negotiate a contract with that firm on that basis. However, should additional sources be identified, they will 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 Governments only official notice of this procurement. See Notes 22. Posted 06/07/00 (W-SN462587). (0159)

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