Jump to main content.


Sole Source Fixed-Price Purchase Order
the Isotech Laboratories

The U.S. Environmental Protection Agency (EPA) Ground Water and Ecosystems Restoration Division (GWERD) intends to award a sole source fixed-price Purchase Order to the Isotech Laboratories using Federal Acquisition Regulation (FAR) Part 13, Simplified Acquisition Procedures, under the authority of FAR Part  FAR Subpart 13.106-1(b) (1) (i).

Samples of groundwater and surface water will be provided for isotopic analyses of dissolved inorganic carbon (DIC), methane, sulfate, and sulfide.  The vendor shall not be required to determine the concentration of inorganic carbon, dissolved sulfur, or dissolved gases in the samples. The isotope analyses are intended to provide information on the carbon and sulfur cycles in the system.  The measurements will be for δ13C of dissolved inorganic carbon, δ13C value of C1 (if concentrations permit), δ2H of hydrogen in methane, δ34S of dissolved sulfide, and δ34S/δ18O of dissolved sulfate.  These analyses will support the Hydraulic Fracturing Case Study in the Raton Basin.  This project is being conducted under a Category 1 QAPP (“Hydraulic Fracturing Retrospective Case Study, Raton Basin, CO; QA ID no. G-16642).  The vendor shall determine the stable isotope ratios of C, S, and H in the water samples and ZnS samples as described above using isotope ratio mass spectrometry. 

Analyses of the laboratory duplicates shall agree within 1 permil δ13C and within 3 permil δ2H, or less.  The measured value of the stable carbon and hydrogen isotope ratio in calibration standards shall be within 0.5 permil or less and 3 permil or less, respectively, of the nominal value in the calibration standards.  Analysis of laboratory duplicates for sulfur isotopes shall be within 0.5 permil.  QA/QC requirements are summarized in the attached tables.

It has been determined that Isotech Laboratories is the only readily available, responsible source that can provide analyses without systematic bias and no other services will satisfy agency requirements.  NO SOLICITATION OR REQUEST FOR QUOTE [RFQ] IS AVAILABLE.  Notwithstanding, any responsible firm who believes it is capable of meeting EPA’s requirement as stated herein may submit a response which, if received within 10 calendar days of the date of this announcement, will be considered.  Responses to this posting must be in writing.  A determination not to compete the proposed Purchase Order based upon the responses to this notice is solely within the discretion of the Government.  All questions should be directed to Holly Pearlman at pearlman.holly@epa.gov or Kevin Broadnax at broadnax.kevin@epa.gov via email.

Office of Research & Development | National Risk Management Research Laboratory


Local Navigation


Jump to main content.