CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER C—AIR PROGRAMS (Parts 50–99) > PART 90—CONTROL OF EMISSIONS FROM NONROAD SPARK-IGNITION ENGINES AT OR BELOW 19 KILOWATTS > SUBPART H—Manufacturer Production Line Testing Program (§90.701 to §90.713) > 90.710—Compliance with criteria for production line testing.

90.710—Compliance with criteria for production line testing.

(a) A failed engine is one whose final deteriorated test results pursuant to § 90.709(c), for HC NOX (NMHC NOX) or CO exceeds the applicable Family Emission Limit (FEL) or standard if no FEL.
(b) An engine family shall be determined to be in noncompliance, if at any time throughout the model year, the CumSum statistic, Ci, for HC NOX (NMHC NOX) or CO, is greater than the action limit, H, for that pollutant, for two consecutive tests.