Administrator determines that compliance with the limitation on
emissions of oxides of nitrogen under the preceding sentence is
technically infeasible, considering the other requirements
applicable under this subsection to such gasoline, the
Administrator may, as appropriate to ensure
compliance with this subparagraph, adjust (or waive entirely),
any other requirements of this paragraph (including the oxygen
content requirement contained in subparagraph (B)) or any
requirements applicable under paragraph (3)(A).
"(B) Oxygen content.-The oxygen content of the gasoline
shall equal or exceed 2.0 percent by weight (subject to a
testing tolerance established by the Administrator) except as
otherwise required by this Act. The Administrator may waive, in
whole or in part, the application of this subparagraph for any
ozone nonattainment area upon a determination by the
Administrator that compliance with such requirement would
prevent or interfere with the attainment by the area of a
national primary ambient air quality standard.
"(C) Benzene content.-The benzene content of the gasoline
shall not exceed 1.0 percent by volume.
"(D) Heavy metals.-The gasoline shall have no heavy metals,
including lead or manganese. The Administrator may waive the
prohibition contained in this subparagraph for a heavy metal
(other than lead) if the Administrator determines that addition
of the heavy metal to the gasoline will not increase, on an
aggregate mass or cancer-risk basis, toxic air pollutant
emissions from motor vehicles.
"(3) More stringent of formula or performance standards.-The
regulations referred to in paragraph (1) shall require compliance
with the more stringent of either the requirements set forth in
subparagraph (A) or the requirements of subparagraph (B) of this
paragraph. For purposes of determining the more stringent
provision, clause (i) and clause (ii) of subparagraph (B) shall
be considered independently.
"(i) Benzene.-The benzene content of the reformulated
gasoline shall not exceed 1.0 percent by volume.
"(ii) Aromatics.-The aromatic hydrocarbon content of the
reformulated gasoline shall not exceed 25 percent by volume.
"(iii) Lead.-The reformulated gasoline shall have no lead
"(iv) Detergents.-The reformulated gasoline shall contain
additives to prevent the accumulation of deposits in engines
or vehicle fuel supply systems.
"(v) Oxygen content.-The oxygen content of the
reformulated gasoline shall equal or exceed 2.0 percent by
weight (subject to a testing tolerance established by the
Administrator) except as otherwise required by this Act.
"(B) Performance standard.-
"(i) VOC emissions.-During the high ozone season (as
defined by the Administrator), the aggregate emissions of
ozone forming volatile organic compounds from baseline
vehicles when using the reformulated gasoline shall be 15
percent below the aggregate emissions of ozone forming
volatile organic compounds from such vehicles when using