CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER C—AIR PROGRAMS (Parts 50–99) > PART 86—CONTROL OF EMISSIONS FROM NEW AND IN-USE HIGHWAY VEHICLES AND ENGINES > SUBPART H—General Provisions for In-Use Emission Regulations for 1994 and Later Model Year Light-Duty Vehicles and Light-Duty Trucks (§86.701-94 to §86.709-99) > 86.709-99—In-use emission standards for 1999 and later model year light-duty trucks.

86.709-99—In-use emission standards for 1999 and later model year light-duty trucks.

Section 86.709-99 includes text that specifies requirements that differ from § 86.091-9 of subpart A of this part. Where a paragraph in § 86.091-9 is identical and applicable to § 86.709-99, this may be indicated by specifying the corresponding paragraph and the statement “[Reserved]. For guidance see § 86.091-9.” Where a corresponding paragraph of § 86.091-9 is not applicable, this is indicated by the statement “[Reserved].”
(a) (1) (A) Light light-duty trucks. In-use exhaust emissions from 1999 and later model year light light-duty trucks shall meet all standards in tables H99-1 and H99-2 in the rows designated with the applicable fuel type and loaded vehicle weight.
Table H99-1—Intermediate Useful Life 1 Standards (g/mi) for Light Light-Duty Trucks
Fuel LVW (lbs) THC NMHC THCE NMHCE CO NOX PM
Gasoline 0-3750 0.25 3.4 0.4 0.08
Gasoline 3751-5750 0.32 4.4 0.7 0.08
Diesel 0-3750 0.25 3.4 1.0 0.08
Diesel 3751-5750 0.32 4.4 0.97 0.08
Methanol 0-3750 0.25 3.4 0.4 0.08
Methanol 3751-5750 0.32 4.4 0.7 0.08
Natural Gas 0-3750 0.25 3.4 0.4 0.08
Natural Gas 3751-5750 0.32 4.4 0.7 0.08
LPG 0-3750 0.25 3.4 0.4 0.08
LPG 3751-5750 0.32 4.4 0.7 0.08
1 The applicable useful life is 5 years or 50,000 miles, whichever first occurs.
Table H99-2—Full Useful Life Standards (g/mi) for Light Light-Duty Trucks
Fuel LVW (lbs) THC 2 NMHC 1 THCE 2 NMHCE 1 CO 1 NOX1 PM 1
Gasoline 0-3750 0.80 0.31 4.2 0.6 0.10
Gasoline 3751-5750 0.80 0.40 5.5 0.97 0.10
Diesel 0-3750 0.80 0.31 4.2 1.25 0.10
Diesel 3751-5750 0.80 0.40 5.5 0.97 0.10
Methanol 0-3750 0.80 0.31 4.2 0.6 0.10
Methanol 3751-5750 0.80 0.40 5.5 0.97 0.10
Natural Gas 0-3750 0.31 4.2 0.6 0.10
Natural Gas 3751-5750 0.40 5.5 0.97 0.10
LPG 0-3750 0.80 0.31 4.2 0.6 0.10
LPG 3751-5750 0.80 0.40 5.5 0.97 0.10
1 The applicable useful life is 10 yeras or 100,000 miles, whichever first occurs, except that no enforcement testing will be done beyond 7 years or 75,000 miles, whichever first occurs.
2 The applicable useful life is 11 years or 120,000 miles, whichever first occurs.
(B) (1) Vehicles subject to the standards of paragraph (a)(1)(i)(A) of this section shall be all actual U.S. sales of light light-duty trucks of the applicable model year by a manufacturer.
(2) A manufacturer can not use one set of engine families to meet its in-use intermediate useful life standards and another to meet its in-use full useful life standards. The same families which are used to meet the intermediate useful life standards will be required without deviation to meet the corresponding full useful life standards.
(ii) (A) Heavy light-duty trucks. In-use exhaust emissions from 1999 and later model year heavy light-duty trucks shall meet all standards in tables H99-3 and H99-4 in the rows designated with the applicable fuel type and adjusted loaded vehicle weight.
Table H99-3—Intermediate Useful Life 1 Standards (g/mi) for Heavy Light-Duty Trucks
Fuel ALVW (lbs) THC NMHC THCE NMHCE CO NOX PM
Gasoline 3751-5750 0.80 0.32 4.4 0.7 0.10
Gasoline >5750 0.80 0.39 5.0 1.1 0.12
Diesel 3751-5750 0.80 0.32 4.4 0.98 0.10
Diesel >5750 0.80 0.39 5.0 1.53 0.12
Methanol 3751-5750 0.80 0.32 4.4 0.7 0.10
Methanol >5750 0.80 0.39 5.0 1.1 0.12
Natural Gas 3751-5750 0.32 4.4 0.7 0.10
Natural Gas >5750 0.39 5.0 1.1 0.12
LPG 3751-5750 0.80 0.32 4.4 0.7 0.10
LPG >5750 0.80 0.39 5.0 1.1 0.12
1 The applicable useful life is 5 years or 50,000 miles, whichever first occurs.
Table H99-4—Full Useful Life 1 Standards (g/mi) for Heavy Light-Duty Trucks
Fuel ALVW (lbs) THC 2 NMHC 1 THCE 2 NMHCE 1 CO 1 NOX1 PM 1
Gasoline 3751-5750 0.80 0.46 6.4 0.98 0.10
Gasoline >5750 0.80 0.56 7.3 1.53 0.12
Diesel 3751-5750 0.80 0.46 6.4 0.98 0.10
Diesel >5750 0.80 0.56 7.3 1.53 0.12
Code of Federal Regulations 50
Methanol 3751-5750 0.80 0.46 6.4 0.98 0.10
Methanol >5750 0.80 0.56 7.3 1.53 0.12
Natural Gas 3751-5750 0.46 6.4 0.98 0.10
Natural Gas >5750 0.56 7.3 1.53 0.12
LPG 3751-5750 0.80 0.46 6.4 0.98 0.10
LPG >5750 0.80 0.56 7.3 1.53 0.12
1 The applicable useful life is 11 years or 120,000 miles, whichever first occurs, except that no enforcement testing will be done beyond 7 years or 90,000 miles, whichever first occurs.
2 The applicable useful life is 11 years or 120,000 miles, whichever first occurs.
(B) (1) Vehicles subject to the standards of paragraph (a)(1)(ii)(A) of this section shall be all actual U.S. sales of heavy light-duty trucks of the applicable model year by a manufacturer.
(2) A manufacturer can not use one set of engine families to meet its in-use intermediate useful life standards and another to meet its in-use full useful life standards. The same families which are used to meet the intermediate useful life standards will be required without deviation to meet the corresponding full useful life standards.
(iii) Exhaust emissions of carbon monoxide from 1999 and later model year light-duty trucks shall not exceed 0.50 percent of exhaust gas flow at curb idle at a useful life of 11 years or 120,000 miles, whichever first occurs (for Otto-cycle and methanol-fueled diesel-cycle light-duty trucks only)
(iv) CST emissions from gasoline-fueled Otto-cycle light-duty trucks measured and calculated in accordance with subpart O of this part may not exceed the standards listed in paragraphs (a)(1)(iv) (A) and (B) of this section.
(A) Hydrocarbons: 220 ppm as hexane.
(B) Carbon monoxide: 1.2 percent.
(2) The standards set forth in paragraphs (a)(1)(i) and (a)(1)(ii) of this section refer to the exhaust emitted over a driving schedule as set forth in subpart B of this part and measured and calculated in accordance with those procedures. The test weight basis for light light-duty trucks, for the purposes of determining equivalent test weight as prescribed in § 86.129-94, shall be loaded vehicle weight. The test weight basis for heavy light-duty trucks, for the purposes of determining equivalent test weight as prescribed in § 86.129-94, shall be adjusted loaded vehicle weight. The standard set forth in paragraph (a)(1)(iii) of this section refers to the exhaust emitted at curb idle and measured and calculated in accordance with the procedures set forth in subpart P of this part.
(3) The standards set forth in paragraph (a)(1)(iv) of this section refer to the exhaust emitted during the CST as set forth in subpart O of this part and measured and calculated in accordance with those provisions.
(b) The provisions of § 86.097-9(b), (c), and (g) through (k) of subpart A of this part apply to this section.

Code of Federal Regulations

[56 FR 25781, June 5, 1991, as amended at 57 FR 31922, July 17, 1992; 58 FR 58425, Nov. 1, 1993; 59 FR 48520, Sept. 21, 1994]