U.S. Environmental Protection Agency, Contracts Management Division, Cincinnati, OH 45268-7001

66 -- STABLE ISOTOPE RATIO MASS SPECTROMETER SOL C600626T1 POC Contact Point, Valen Wade, (513)366-2144, Contracting Officer, Lisa Bentley, (513)366-2041 The U.S. EPA National Risk Management Research Laboratory requires the use of a Stable Isotope Ratio Mass Spectrometer (SIRMS). The Agency anticipates procuring this instrument as a sole source requirement. Only contractors providing documentation in support of their claim of capability to produce the equipment with the characteristics as described below need respond. All other requests for the RFP will not be honored. The instrument is targeted for the characterization of stable isotopes in aqueous matrices. The near-term applications will involve surface water and ground water interaction processes; point and non-point source identification; and water supply tracing. This instrument will be a key component of a isotope hydrology laboratory. The SIRMS must consist of a magnetic sector analyzer, electron impact ion source, vacuum system with turbomolecular pumps, electromagnet, digital mass selector, high voltage supply, pressure gauges, instrument control panel, multielement collector system, dual viscous inlet system, HD collector, CO2/H2/H2O equilibration device, water recirculator, multiport system, tube cracker system, microvolume inlet system, workstation for spectral interpretation and system control, and a printer plotter for data recording and graphics plotting. The CO2/H2/H20 equilibration device must be fully automated and utilize a platinum coated hydrophobic porous resin as the H2 catalyst, and be an integral modular component of the mass spectrometer. Performance for oxygen-18/oxygen-16 should be (0.05 per mil and hydrogen/deuterium should be (1 per mil. Literature in support of the required instrumentation should be provided to V. Wade at the address identified above. (0165)

Loren Data Corp. http://www.ld.com (SYN# 0335 19960614\66-0010.SOL)