5 Colo. Code Regs. § 1001-15-B-V

Current through Register Vol. 47, No. 24, December 25, 2024

Section 5 CCR 1001-15-B-V - Opacity Standards for Diesel-Powered Motor Vehicles Subject to Part B of This Regulation

V.A. In order for a vehicle (owner) to obtain a valid Certification of Emissions Compliance, the exhaust opacity from the diesel-powered motor vehicle subject to the annual Diesel Opacity Inspection Program may not exceed the following maximum opacity level.

V.B. The smoke opacity standard for all naturally aspirated light-duty diesel vehicles subject to opacity test under Part B of this regulation shall be forty percent (40%) opacity for (5) five seconds. The smoke opacity standard for turbocharged light-duty vehicles shall be thirty-five percent (35%) for five (5) seconds.

For all heavy-duty vehicles subject to opacity tests under Part B of this regulation, the opacity standards shall be thirty-five percent (35%) and twenty percent (20%) for naturally aspirated and turbocharged diesel vehicles respectively for five (5) seconds.

V.C. Peak opacity (snap/free acceleration) tests shall be a component of the Heavy-duty diesel vehicle tests and conducted following the procedures specified in Part B, III. of this regulation, and recorded on the Opacity Inspection Form, but no peak opacity standard shall apply.

V.D. Opacity Standards for Diesel Vehicles with Non-Original Engines (Engine Changes)

For those vehicles in which the original engine has been replaced, the opacity standards and applicable emissions control equipment for the year and model of the vehicle body/chassis, shall apply.

Those diesel-powered vehicles titled/registered as model year 1991 and newer, that were assembled by other than a licensed manufacturer such as a kit-car or truck glider kit, and registered/titled according to Section(s) 42-1-102 (45.5) and/or 42-12-203; or the applicable emissions control equipment will be based upon a determination by technical center personnel of the vintage of the vehicle engine. An affidavit may be issued by the technical center personnel and the year of the engine shall be presumed to be that stated by the vehicle owner unless it is determined by center personnel, after physical inspection of the vehicle engine, that the year of the engine is other than stated by the owner. The emissions standards for a vehicle of this classification will be determined by the model year of the vehicle as registered/titled.

5 CCR 1001-15-B-V

39 CR 18, September 25, 2016, effective 10/15/2016

41 CR 21, November 10, 2018, effective 11/30/2018