United States
            Environmental Protection
            Agency	
Air and Energy Engineering
Research Laboratory
Research Triangle Park, NC 27711
            Research and Development
EPA/600/SR-92/141 December 1992
EPA     Project Summary

            Recommended Operating
            Procedure No.  56:  Collection of
            Gaseous Grab Samples from
            Combustion  Sources for Nitrous
            Oxide Measurement
            Jeffrey V. Ryan and Shawn A. Karns
             This recommended operating proce-
            dure (HOP) has been prepared for usŤ
            in research activities conducted by
            EPA's Air and Energy Engineering Re-
            search Laboratory (AEERL). The pro-
            cedure applies to the collection of gas-
            eous grab samples from fossil fuel com-
            bustion sources for subsequent analy-
            sis of nitrous oxide. This procedure}
            details only the grab sampling method-
            ology and associated equipment.
             This Project Summary was developed
            by EPA's Air and Energy Engineering
            Research Laboratory, Research Tri-
            angle Park, NC, to announce key find-
            ings of the research project that is fully
            documented in a separate report of the
            same title (see Project Report ordering
            information at back).
  ROPs describe non-routine or experi-
mental research operations where some
judgment in application may be warranted.
ROPs may not be applicable to activities
conducted by other research groups and
should not be used in place of standard
operating procedures or  EPA-approved
test methods. Use of ROPs must be ac-
companied by an understanding of their
purpose and scope.
                                                  Printed on Recycled Paper

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   Jeffrey V. Ryan and Shawn A. Karns are with Acurex Environmental, Research
     Triangle Park, NC 27709.
   William P. Unak is the EPA Project Officer (see below)
   The complete report, entitled "Recommended Operating Procedure No. 56: Collec-
     tion of Gaseous Grab Samples from Combustion Sources for Nitrous Oxide
     Measurement," (Order No. PB92-216 928/AS; Cost: $17.00; subject to change)
     will ba available only from:
          National Technical Information Service
          5285 Port Royal Road
          SpringfiekJ,VA22161
          Telephone: 703-487-4650
   The EPA Project Officer can be contacted at:
          Air and Energy Engineering Research Laboratory
          U.S. Environmental Protection Agency
          Research Triangle Park, NC 27711
United States Environmental Protection Agency
Center for Environmental Research Information
Cincinnati, Ohio

Official Business
Penalty for Private Use
$300
      BULK RATE
POSTAGE & FEES PAID
         EPA
   PERMIT No. G-35
EPA/600/SR-92/141

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