Appendix A - Appendix A to Part 1054—Summary of Previous Emission Standards
The following standards, which EPA originally adopted under 40 CFR part 90, apply to nonroad spark-ignition engines produced before the model years specified in § 1054.1:
(a) Handheld engines. (1) Phase 1 standards apply for handheld engines as summarized in the following table starting with model year 1997:
Table 1 to Appendix I—Phase 1 Emission Standards for Handheld Engines
[g/kW-hr] a
| Engine displacement class | HC | NO | CO | Class III | 295 | 5.36 | 805 | Class IV | 241 | 5.36 | 805 | Class V | 161 | 5.36 | 603 |
|---|
a Phase 1 standards are based on testing with new engines only.
(2) Phase 2 standards apply for handheld engines as summarized in the following table starting with model year 2002 for Class III and Class IV, and starting in model year 2004 for Class V:
Table 2 to Appendix I—Phase 2 Emission Standards for Handheld Engines
[g/kW-hr]
| Engine displacement class | HC + NO | CO | Class III | a 50 | 805 | Class IV | b 50 | 805 | Class V | c 72 | 603 |
|---|
a Class III engines had alternate HC+NO
b Class IV engines had alternate HC+NO
c Class V engines had alternate HC+NO
(b) Nonhandheld engines. (1) Phase 1 standards apply for nonhandheld engines as summarized in the following table starting with model year 1997:
Table 3 to Appendix I—Phase 1 Emission Standards for Nonhandheld Engines
[g/kW-hr] a
| Engine displacement class | HC + NO | CO | Class I | 16.1 | 519 | Class II | 13.4 | 519 |
|---|
a Phase 1 standards are based on testing with new engines only.
(2) Phase 2 standards apply for nonhandheld engines as summarized in the following table starting with model year 2001 (except as noted for Class I engines):
Table 4 to Appendix I—Phase 2 Emission Standards for Nonhandheld Engines
[g/kW-hr]
| Engine displacement class | HC + NO | NMHC + NO | CO | Class I-A | 50 | 610 | Class I-B | 40 | 37 | 610 | Class I a | 16.1 | 14.8 | 610 | Class II b | 12.1 | 11.3 | 610 |
|---|
a The Phase 2 standards for Class I engines apply for new engines produced starting August 1, 2007, and for any engines belonging to an engine model whose original production date was on or after August 1, 2003.
b Class II engines had alternate HC + NO
(3) Note that engines subject to Phase 1 standards were not subject to useful life, deterioration factor, production-line testing, or in-use testing provisions. In addition, engines subject to Phase 1 standards and engines subject to Phase 2 standards were both not subject to the following provisions:
(i) Evaporative emission standards as specified in §§ 1054.110 and 1054.112.
(ii) Altitude adjustments as specified in § 1054.115(c).
(iii) Warranty assurance provisions as specified in § 1054.120(f).
(iv) Emission-related installation instructions as specified in § 1054.130.
(v) Bonding requirements as specified in § 1054.690.