State of California 

AIR RESOURCES BOARD 

CALIFORNIA EXHAUST EMISSION STANDARDS AND TEST PROCEDURES 

FOR NEW 1996 AND LATER TIER 1, TIER 2, AND TIER 3 OFF-ROAD 

COMPRESSION-IGNITION ENGINES 

PART II 

Adopted: May 12, 1993 

Amended: January 28, 2000 

Amended: October 20, 2005

NOTE: This document incorporates by reference the International 

Standards Organization (ISO) 8178 test procedure, Part 1, June 3, 

1992, and Part 4, June 30, 1992, and Part 5, June 3, 1992, with 

modifications. Sections which have been included in their entirety 

are set forth with the section number and title. California provisions 

which modify specific ISO language provisions are denoted by the 

words “DELETE” for the ISO language and “REPLACE WITH” for 

the new California language. The symbols “*****” and “...” mean 

that the remainder of the ISO text for a specific section is not shown 

in these procedures but has been included by reference, 

unchanged. ISO sections which are not listed are not part of the 

procedures. 

This Document is printed in a style to indicate changes from 

existing provisions. All existing language in indicated by plain type. 

All additions to language are indicated by underline. All deletions to 

language are indicated by strikeout. 

If there is any conflict between the provisions of this document and 

the California Health and Safety Code, Division 26, or Title 13 of 

the California Code of Regulations, the Health and Safety Code 

and Title 13 apply. 
CALIFORNIA EXHAUST EMISSION STANDARDS AND TEST PROCEDURES 

FOR NEW 1996 AND LATER TIER 1, TIER 2, AND TIER 3 OFF-ROAD 

COMPRESSION-IGNITION ENGINES 

PART II 

To the extent the following provisions of ISO 8178, Part 1, version N95, June 3, 

1992, and Part 4, version N97, June 30, 1992, and Part 5, version N99, June 3, 

1992, pertain to the testing and compliance of exhaust emissions from off-road 

compression-ignition engines, they are adopted and incorporated herein by this 

reference as Part II of the California Exhaust Emission Standards and Test 

Procedures for New 1996-1999 Heavy-Duty Off-Road Compression-Ignition 

Engines (1996-1999 Heavy-Duty Test Procedures) and the California Exhaust 

Emission Standards and Test Procedures for New 2000 and Later Tier 1, Tier 2, 

and Tier 3 Off-Road Compression-Ignition Engines (2000 Plus Limited Test 

Procedures), except as altered or replaced by the provisions set forth below. 

Since the scope of this regulation is limited to off-road compression-ignition 

engines, the ISO provisions contained in the procedure identified above which 

pertain to Otto cycle engines or to engines used for applications other than 

off-road purposes shall not be applicable to Part II of these procedures. 

ISO 8178, RIC Engines – Exhaust emission measurement – Part 1: Test bed 

measurement of gaseous and particulate exhaust emissions from RIC engines. 

1. Scope 

2. Normative References 

3. Definitions 

 ADD: 

Note: In addition to the definitions listed here, those definitions 

listed in Section 2 of the 1996-1999 Heavy-Duty Test 

Procedures and Section 89.2 of the 2000 Plus Limited Test 

Procedures shall apply. 

 * * * * * 
4. Symbols and Abbreviations 

 ADD: 

Note: In addition to the symbols and abbreviations listed here, 

those symbols and abbreviations listed in Section 3 of the 

1996-1999 Heavy-Duty Test Procedures and Section 89.3 of 

the 2000 Plus Limited Test Procedures shall apply. 

 * * * * * 

5. Test Conditions 

6. Test Fuels 

 DELETE 

 REPLACE WITH: 

Test fuels shall meet the requirements specified in Section 25 of 

the 1996-1999 Heavy-Duty Test Procedures or Section 89.330 of 

the 2000 Plus Limited Test Procedures, as applicable. 

7. Measurement Equipment and data to be measured 

 DELETE any reference to the single filter method.

8. Calibration of the analytical instruments 

9. Calibration of the particulate sampling system 

10. Running conditions (Test cycles) 

11. Test run 

 DELETE any reference to the single filter method.

12. Data evaluation for gaseous and particulate emission 

13. Calculation of the gaseous emissions 

14. Calculation of the particulate emission 

 DELETE any reference to the single filter method.

15. Determination of the gaseous emissions 

16. Determination of the particulates 
Figures and Explanations 

Annex A 

Annex B Auxiliary Equipment 

Annex C NMHC method, efficiency 

Annex D Calculation formulas for u, v, w 

Annex E Heat calculation (transfer tube) 

Annex F Informative 

ISO 8178, RIC Engines – Exhaust emission measurement – Part 4: Test cycles 

for different engine applications. 

1. Scope 

2. Normative References 

3. Definitions 

 ADD: 

Note: In addition to the definitions listed here, those definitions 

listed in Section 2 of the 1996-1999 Heavy-Duty Test 

Procedures and Section 89.2 of the 2000 Plus Limited Test 

Procedures shall apply. 

 * * * * * 

4. Symbols and Abbreviations 

 ADD: 

Note: In addition to the symbols and abbreviations listed here, 

those symbols and abbreviations listed in Section 3 of the 

1996-1999 Heavy-Duty Test Procedures and Section 89.3 of 

the 2000 Plus Limited Test Procedures shall apply. 

 * * * * * 

5. Information regarding preparation of the test 
 DELETE any reference to ISO 8178-2. 

6. Modes and weighting factors for test cycles 

 * * * * * 

6.1 DELETE 

6.2 DELETE 

6.3 Test cycle types C “Off-road vehicles and industrial equipment” 

* * * * * 

 6.3.2 DELETE 

 6.4 DELETE 

 6.5 DELETE 

 6.6 DELETE 

6.7 DELETE 

ISO 8178, RIC Engines – Exhaust emission measurement – Part 5: 

Specifications of test fuels. 

1. Scope 

 DELETE 

 REPLACE WITH: 

This part specifies the calculation of the specific factors and 

exhaust flow, which are necessary to determine the emission test 

results in accordance with ISO 8178, Part 1. 

2. Normative References 
3. Definitions 

 ADD: 

Note: In addition to the definitions listed here, those definitions 

listed in Section 2 of the 1996-1999 Heavy-Duty Test 

Procedures and Section 89.2 of the 2000 Plus Limited Test 

Procedures shall apply. 

 * * * * * 

4. Symbols and Abbreviations 

 ADD: 

Note: In addition to the symbols and abbreviations listed here, 

those symbols and abbreviations listed in Section 3 of the 

1996-1999 Heavy-Duty Test Procedures and Section 89.3 of 

the 2000 Plus Limited Test Procedures shall apply. 

 * * * * * 

6. Remarks 

 DELETE 

7. Calculation of the Exhaust Gas Flow Using Fuel Specific Factors 

8. Calculation of the Fuel Specific Factors 

Tables 

Appendix A 

Appendix B 

Appendix C