Sec. 86.1811-01 Emission standards for light-duty vehicles.

This section applies to 2001 and later model year light-duty
vehicles fueled by gasoline, diesel, methanol, natural gas and
liquefied petroleum gas fuels except as noted. Multi-fueled vehicles
shall comply with all requirements established for each consumed fuel.
For methanol fueled vehicles, references in this section to total
hydrocarbons shall mean total hydrocarbon equivalents and references to
non-methane hydrocarbons shall mean non-methane hydrocarbon
equivalents.
(a) Exhaust emission standards. (1) Exhaust emissions shall not
exceed the following standards at intermediate useful life:
(i) Total hydrocarbons: 0.41 grams per mile, except natural gas,
which has no standard.
(ii) Non-methane hydrocarbons: 0.25 grams per mile.
(iii) Carbon monoxide: 3.4 grams per mile.
(iv) Oxides of nitrogen: 0.4 grams per mile except diesel fuel
which has a 1.0 gram per mile standard.
(v) Particulate matter: 0.08 grams per mile.
(2) Exhaust emissions shall not exceed the following standards at
full useful life:
(i) [Reserved]
(ii) Non-methane hydrocarbons: 0.31 grams per mile.
(iii) Carbon monoxide: 4.2 grams per mile.
(iv) Oxides of nitrogen: 0.6 grams per mile except diesel fuel
which has a 1.25 gram per mile standard.
(v) Particulate matter: 0.10 grams per mile.
(b) Supplemental exhaust emission standards. (1) Supplemental
exhaust emissions from gasoline-fueled and diesel-fueled light-duty
vehicles shall not exceed the following standards at intermediate
useful life:
(i) Nonmethane hydrocarbon and oxides of nitrogen composite: 0.65
grams per mile except diesel fuel which has a 1.48 gram per mile
standard.
(ii) Carbon monoxide. Regulated vehicles shall meet at least one of
the following two sets of standards:
(A) Individual US06 and SC03 Air Conditioning compliance. Comply
with both the following standards:
(1) 3.0 grams per mile on the A/C test, not applicable to diesel
fueled vehicles; and
(2) 9.0 grams per mile on the US06 test; or
(B) Composite Carbon Monoxide Standard: 3.4 grams per mile.
(2) Supplemental exhaust emissions from gasoline-fueled and diesel-
fueled light-duty vehicles shall not exceed the following standards at
full useful life:
(i) Nonmethane hydrocarbon and oxides of nitrogen composite: 0.91
grams per mile except diesel-fueled which have a 2.07 gram per mile
standard.
(ii) Carbon monoxide. Regulated vehicles shall meet at least one of
the following two sets of standards:
(A) Individual US06 and SC03 Air Conditioning compliance. Comply
with both the following standards:
(1) 3.7 grams per mile on the A/C test, not applicable to diesel
fueled vehicles; and
(2) 11.1 grams per mile on the US06 test; or
(B) Composite Carbon Monoxide Standard: 4.2 grams per mile.
(c) Cold temperature emission standards. Exhaust emissions from
gasoline-fueled light-duty vehicles shall not exceed the cold
temperature CO standard of 10.0 grams carbon monoxide per mile for an
intermediate useful life of 50,000 miles.
(d) Evaporative emission standards. Evaporative emissions from
gasoline-fueled, natural gas-fueled, liquefied petroleum gas-fueled,
and methanol-fueled light-duty vehicles shall not exceed the following
standards. The standards apply equally to certification and in-use
vehicles. The spitback standard also applies to newly assembled
vehicles.
(1) Hydrocarbons.
(i) For the full three-diurnal test sequence, diurnal plus hot soak
measurements: 2.0 grams per test.
(ii) Gasoline and methanol-fueled only. For the supplemental two-
diurnal test sequence, diurnal plus hot soak measurements: 2.5 grams
per test.
(iii) Gasoline and methanol-fueled only. For the running loss test:
0.05 grams per mile.
(iv) Gasoline and methanol-fueled only. For the fuel dispensing
spitback test: 1.0 gram hydrocarbon (carbon for methanol-fueled) per
test.
(2) [Reserved]
(e) Refueling emissions. Refueling emissions from 2001 and later
model year light-duty vehicles shall not exceed the following
standards:
(1) For gasoline-fueled, diesel fueled, and methanol-fueled
vehicles: 0.20 grams hydrocarbon per gallon (0.053 gram per liter) of
fuel dispensed.
(2) For liquefied petroleum gas-fueled vehicles: 0.15 grams
hydrocarbon per gallon (0.04 gram per liter) of fuel dispensed.
(f) Certification short test. Certification short test emissions
from gasoline-fueled Otto-cycle light-duty vehicles shall not exceed
the following standards:
(1) Hydrocarbons: 100 ppm as hexane.
(2) Carbon monoxide: 0.5%.