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IMPACT OF TEST METHOD ON
PARTICULATE EMISSIONS MEASUREMENTS
   Test Method
Temperature “Cut” Point
Species Included in Particulate  Measurement
EPA 17
Flue Gas Temp.
 “Rocks” only
EPA 5, 320F Probe
(current utility NSPS)
         320 F
Rocks plus a small
Percentage of Sox
EPA5, 180 or 248 F
Probe temperatures
     180 or 248 F
Rocks + larger percentage of
condensible species
EPA 201 or 202
(i.e. PM2.5 type tests)
      Ambient
Rocks plus all condensibles