Appendix I to Part 1039 - Summary of Previous Emission Standards

Appendix I to Part 1039 - Summary of Previous Emission Standards

The following standards, which EPA originally adopted under 40 CFR part 89, apply to nonroad compression-ignition engines produced before the model years specified in § 1039.1:

(a) Tier 1 standards apply as summarized in the following table:

Table 1 to Appendix I - Tier 1 Emission Standards

[g/kW-hr]

Rated power (kW)	Starting model year	NOX	HC	NOX+NMHC	CO	PM
kW < 8	2000			10.5	8.0	1.0
8 ≤ kW < 19	2000			9.5	6.6	0.80
19 ≤ kW < 37	1999			9.5	5.5	0.80
37 ≤ kW < 75	1998	9.2
75 ≤ kW < 130	1997
130 ≤ kW ≤ 560	1996	9.2	1.3		11.4	0.54
kW > 560	2000

(b) Tier 2 standards apply as summarized in the following table:

Table 2 to Appendix I - Tier 2 Emission Standards

[g/kW-hr]

Rated power (kW)	Starting model year	NOX+NMHC	CO	PM
kW < 8	2005	7.5	8.0	0.80
8 ≤ kW < 19	2005	7.5	6.6	0.80
19 ≤ kW < 37	2004	7.5	5.5	0.60
37 ≤ kW < 75	2004	7.5	5.0	0.40
75 ≤ kW < 130	2003	6.6	5.0	0.30
130 ≤ kW < 225	2003	6.6	3.5	0.20
225 ≤ kW < 450	2001	6.4	3.5	0.20
450 ≤ kW ≤ 560	2002
kW > 560	2006

(c) Tier 3 standards apply as summarized in the following table:

Table 3 to Appendix I - Tier 3 Emission Standards

[g/kW-hr]

Rated power (kW)	Starting model year	NOX+NMHC	CO	PM
37 ≤ kW < 75	2008	4.7	5.0	0.40
75 ≤ kW < 130	2007	4.0	5.0	0.30
130 ≤ kW ≤ 560	2006	4.0	3.5	0.20

(d) Tier 1 through Tier 3 standards applied only for discrete-mode steady-state testing. There were no not-to-exceed standards or transient testing.

[86 FR 34507, June 29, 2021]