CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER C—AIR PROGRAMS (Parts 50–99) > PART 89—CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES > SUBPART E—Exhaust Emission Test Procedures (§89.401 to §89.425) > 89.417—Data evaluation for gaseous emissions.

89.417—Data evaluation for gaseous emissions.

For the evaluation of the gaseous emission recording, the last 60 seconds of each mode are recorded, and the average values for HC, CO, CO2, and NOX during each mode are determined from the average concentration readings determined from the corresponding calibration data.

Code of Federal Regulations

[59 FR 31335, June 17, 1994. Redesignated at 63 FR 56996, Oct. 23, 1998]