State may use alternative empirical based modeling approaches pursuant
to guidelines issued by the Administrator.".
SEC. 235. FEDERAL COMPLIANCE.
Section 118 of the Clean Air Act is amended by inserting "General
Compliance.-" after "Sec. 118. (a)" and by adding at the end
thereof the following:
"(c) Government Vehicles.-Each department, agency, and
instrumentality of executive, legislative, and judicial branches of
the Federal Government shall comply with all applicable provisions of
a valid inspection and maintenance program established under the
provisions of subpart 2 of part D or subpart 3 of part D except for
such vehicles that are considered military tactical vehicles.
"(d) Vehicles Operated on Federal Installations.-Each department,
agency, and instrumentality of executive, legislative, and judicial
branches of the Federal Government having jurisdiction over any
property or facility shall require all employees which operate motor
vehicles on the property or facility to furnish proof of compliance
with the applicable requirements of any vehicle inspection and
maintenance program established under the provisions of subpart 2 of
part D or subpart 3 of part D for the State in which such property or
facility is located (without regard to whether such vehicles are
registered in the State). The installation shall use one of the
following methods to establish proof of compliance-
"(1) presentation by the vehicle owner of a valid certificate
of compliance from the vehicle inspection and maintenance
"(2) presentation by the vehicle owner of proof of vehicle
registration within the geographic area covered by the vehicle
inspection and maintenance program (except for any program whose
enforcement mechanism is not through the denial of vehicle
"(3) another method approved by the vehicle inspection and
maintenance program administrator.".
TITLE III-HAZARDOUS AIR POLLUTANTS
Sec. 301. Hazardous Air Pollutants.
Sec. 302. Conforming Amendment.
Sec. 303. Risk Assessment and Management Commission.
Sec. 304. Chemical Process Safety Management.
Sec. 305. Solid Waste Combustion.
Sec. 306. Ash Management and Disposal.
SEC. 301. HAZARDOUS AIR POLLUTANTS.
Section 112 of the Clean Air Act is amended to read as follows:
"SEC. 112. HAZARDOUS AIR POLLUTANTS.
"(a) Definitions.-For purposes of this section, except subsection
"(1) Major source.-The term `major source' means any stationary
source or group of stationary sources located within a contiguous
area and under common control that emits or has the potential to
emit considering controls, in the aggregate, 10 tons per year or
more of any hazardous air pollutant or 25 tons per year or more
of any combination of hazardous air pollutants. The
Administrator may establish a lesser quantity, or in the case of
radionuclides different criteria, for a major source than that
specified in the previous sentence, on the basis of the potency