01938oam 2200493 450 991071663590332120211215140631.0(CKB)5470000002523808(OCoLC)1260470850(EXLCZ)99547000000252380820210719d1999 ua 0engur|||||||||||txtrdacontentcrdamediacrrdacarrierGuidance to states on smoke opacity cutpoints to be used with the SAE J1667 in-use smoke test procedureAnn Arbor, Michigan :United States Environmental Protection Agency, National Vehicle and Fuel Emissions Laboratory,1999.1 online resource (2 pages)"EPA420-F-99-024."Includes bibliographical references (page 1).Guidance to states on smoke opacity cutpoints to be used with the Society Automotive Engineers J1667 in-use smoke test procedureVehiclesMotors (Diesel)Exhaust gasUnited StatesMotor vehiclesUnited StatesMotors (Diesel)Exhaust gasSmokeOptical propertiesDiesel motor exhaust gasOptical propertiesSmokeOptical propertiesfastUnited StatesfastVehiclesMotors (Diesel)Exhaust gasMotor vehiclesMotors (Diesel)Exhaust gas.SmokeOptical properties.Diesel motor exhaust gasOptical properties.SmokeOptical properties.National Vehicle and Fuel Emissions Laboratory (U.S.),GPOGPOOCLCOOCLCFOCLCQGPOBOOK9910716635903321Guidance to states on smoke opacity cutpoints to be used with the SAE J1667 in-use smoke test procedure3261671UNINA