California Code of Regulations
Title 13 - Motor Vehicles
Division 3 - Air Resources Board
Chapter 3.7 - Heavy-Duty Vehicle Inspection and Maintenance Program
Section 2196.6 - Smoke Opacity Standards

Universal Citation: 13 CA Code of Regs 2196.6

Current through Register 2024 Notice Reg. No. 38, September 20, 2024

(a) When tested using the SAE J1667 smoke opacity test procedure, a vehicle equipped with an on-road engine used for motive power shall not exceed the smoke opacity standards specified below:

(1) 5% for any heavy-duty vehicle powered by a 2007 or subsequent model-year diesel engine.

(2) 5% for any heavy-duty vehicle required to be equipped or retrofitted with a Level 3 VDECS, regardless of its diesel engine model-year.

(3) 20% for any heavy-duty vehicle equipped or retrofitted with a Level 2 VDECS, regardless of its diesel engine model-year.

(4) 20% for any heavy-duty vehicle powered by a 1997 to 2006 model-year diesel engine.

(5) 30% for any heavy-duty vehicle powered by a 1991 to 1996 model-year diesel engine.

(6) 40% for any heavy-duty vehicle powered by a pre-1991 model-year diesel engine.

(b) When tested using the SAE J1667 smoke opacity test procedure, a vehicle equipped with an off-road engine used for motive power shall not exceed the smoke opacity standards specified below:

(1) 5% for any heavy-duty vehicle powered with an off-road engine certified with a diesel particulate filter.

(2) 5% for any heavy-duty vehicle powered with an off-road engine retrofitted with a Level 3 VDECS.

(3) 10% for any heavy-duty vehicle powered with an off-road Tier 4 engine (interim or final) that is not equipped with a diesel particulate filter or is not retrofitted with a Level 3 VDECS.

(4) 30% for any heavy-duty vehicle powered with an off-road Tier 2 or Tier 3 engine not retrofitted with a Level 3 VDECS.

(5) 40% for any heavy-duty vehicle powered with an off-road Tier 1 engine not retrofitted with a Level 3 VDECS.

1. New section filed 10-5-2022; operative 1-1-2023 (Register 2022, No. 40).

Note: Authority cited: Sections 39002, 39003, 39600, 39601, 43000, 43013, 43018, 43701, 44011.6 and 44152, Health and Safety Code; and Section 27153, Vehicle Code. Reference: Sections 43701, 44011.6 and 44152, Health and Safety Code; and Section 27153, Vehicle Code.

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