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Appendix A                                                                                Flow RATA Observation Sheet

Were any pre-RATA adjustments made to the CEMS?

Pre-RATA non-routine adjustments are allowed by Part 75.  Adjustments may not be made between runs at a load level or between load levels except for routine adjustments as a result of the calibration error test (App. B, ' 2.1.3).

4.  RATA Observations (Method 2)

RATA Checks


Does the stack test equipment setup match that required by the reference method? Circle reference methods below:

Velocity and Volumetric Flow - Method 2, 2F, 2G, 2H

O2/CO2/MW- RM3 or RM3a

H2O - RM4 (condensation or wet bulb - dry bulb)

If Method 2F, 2G, or 2H is used, you should use the inspection checklists developed specifically for those methods available at CAMD=s website (See Note at top of the checklist)

Check the traverse point locations (RM 1) for the reference method tests, and the sampling location dimensions.  Are the sampling points correctly marked on the pitot tube?  A flow test should use at least 12 traverse points, unless also using RM 2H which requires at least 16 points (Part 60, Appendix B).

Stack Dimensions Measured:YesNo

Stack Dimensions:

Number of Traverse Point:

Was a pre-test leak check performed?  This is optional.

Observe the pitot tube position at the sample points. It should match the sample point markings on the tube or probe.  Is the pitot aligned perpendicular to the stack/duct centerline?

Are the p readings stable before recorded?

Observe post-test leak check.  Leak checks are required after each flow method run -- if failed the run is not valid.  

How many moisture measurements are taken?


Part 75 Field Audit Manual - July 16, 2003                                                                                                       Page A-23

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