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

66 -- STABLE ISOTOPE RATIO MASS SPECTROMETER SOL C600624T1 DUE 061396 POC Contact Point, Valen Wade, (513)366-2144, Contracting Officer, Lisa Bentley, (513)366-2041 The US-EPA, NHEERL, WED-Corvallis plans to procure on a competitive basis a fully integrated computer controlled stable isotope ratio system for the natureal abundance-level measurements of (1) the stable carbon, nitrogen, oxygen, and hydrogen isotopic compositions of gaseous samples, and (2) the stable carbon, nitrogen and sulfus isotopic compositions of liquid and solid samples. The primary application of this instrument will be for the study of Carbon, Nitrogen, Oxygen and Water dynamics in plant/soil systems under stresses associated with climate change, such as elevated CO2, temperature, and reduced soil moisture. Pleas provide a written request for the referenced RFP to the attention of Ms. V. Wade as identified as above. Requests may be faxed to the attention of V. Wade at 513-366-2107, however a hard copy should follow. (0150)

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