FEDERAL REGISTER NOTICES PUBLISHED SINCE ENACTMENT OF
                       THE CLEAN AIR ACT AMENDMENTS OF 1990

                                September 10, 1993

Federal Register Notice:                                       Date Published:

New Source Review Reform Subcommittee                          September 1, 1993
(Notice of Public Meeting)

Approval of South Carolina's Petition to Relax                 September 1, 1993
the Federal Reid Vapor Pressure Volatility Standard
for South Carolina from 7.8 psi to 9.0 psi (Direct
Final Rule)

Standards of Performance for New Stationary Sources            August 31, 1993
Volatile Organic Compound (VOC) Emissions from the
Synthetic Organic Chemical Manufacturing Industry
(SOCMI) Reactor Processes (Notice of Final Rule)

Petition to Remove the Compound Caprolactam from               August 26, 1993
Hazardous Air Pollutant List (Notice of Receipt
of Petition)

CAA Contractor Access to Confidential Business                 August 25, 1993
Information (Notice)

State of Alaska Petition for Exemption from Diesel             August 23, 1993
Sulfur Requirement of Section 211(i) of the CAA as
Amended (Notice of Proposed Decision)

National Primary Ambient Air Quality Standards                 August 20, 1993
for Sulfur Oxides (Notice Extending Public Comment
Period on the Sulfur Dioxide Criteria Document and
Staff Paper Supplements)

Clean Air Act Advisory Committee (Request for                  August 13, 1993
Candidates)

Special Exemptions from Requirements Section 325(a)            August 12, 1993
of the CAA, Territory of Guam (Notice of Final Rule)

National Emission Standards for Hazardous Air                  August 12, 1993
Pollutants for Chromium Emissions from Industrial
Process Cooling Towers (Notice of Proposed Rule)

National Emission Standards for Hazardous Air                  August 11, 1993
Pollutants for Source Categories; General
Provisions (Notice of Proposed Rule)

Workshops Sponsored Committees of the Grand                    August 10, 1993
Canyon Visibility Transport Commission 
(Notice of Meetings)

Final Agency Actions Regarding the Motor Vehicle               August 10, 1993
Provisions of the CAA (Notice of Mobile Source
Final Agency Actions)

Clean Fuel Fleet Emission Standards, Conversions,              August 9, 1993
and General Provisions and the Clean-Fuel
Vehicle Standards for Light-Duty Vehicles and
Light-Duty Trucks (Proposed Rules; Extension
of the Comment Period)

Standards of Performance for New Stationary                    July 29, 1993
Sources: Calciners and Dryers in Mineral
Industries; Amendment (Notice of Correction)

Protection of Stratospheric Ozone (Section 114                 July 27, 1993
Information Request to Establish Baselines for
Newly Listed Ozone Depleting Chemicals and to
Meet UNEP Reporting Requirements)

Policy Regarding the Sale of 1985 and Subsequent               July 22, 1993
Model Year California Vehicles (Notice of Public
Workshop and Request for Comments)

Protection of Stratospheric Ozone (Request for                 July 20, 1993
Comments on Recordkeeping and Reporting 
Requirements of Newly Listed Ozone-Depleting
Substances)

CAA Contractor Access to Confidential Business                 July 20, 1993
Information (Notice)

Requirements for Preparation, Adoption, and                    July 20, 1993
Submittal of Implementation Plans; Revised
Guideline on Air Quality Models (Notice of Final
Rule)

Acid Rain Program (Notice of Draft Permits and                 July 16, 1993
Public Comment Period)

Hazardous Air Pollution (Proposed Regulations                  July 13, 1993
Governing Equivalent Emission Limitations by Permit
Under Section 112(j) of the Clean Air Act, As
Amended)

Retrofit/Rebuild Requirements for 1993 and Earlier             July 9, 1993
Model Year Urban Buses (Notice of Public Workshop
for Equipment Certifiers)

Fuels and Fuel Additives (Ethyl Corporation Waiver             July 2, 1993
Application for Methylcyclopentadienyl Tricarbonyl
(MMT) and Petition for Review - Circuit Court Remand)

Clean Fuel Fleet Emission Standards, Conversions,              July 1, 1993
and General Provisions and Amended Heavy-Duty
Averaging, Banking, and Trading Credit Accounting
Regulations (Notice of Clarification Concerning
the Comment Period and Opportunity to Request a
Public Hearing)

California State Motor Vehicle Pollution Control               July 1, 1993
Standards (Notice of Opportunity for Public
Hearing and Public Comment)

Emission Defect Reporting Requirements (Notice of              June 30, 1993
Public Workshop and Request for Comments)

Prevention of Significant Deterioration (PSD) for              June 30, 1993
Particulate Matter (Notice of Correction to Final
Rule)

The California Pilot Test Program and Clean-Fuel               June 29, 1993
Vehicle Standards for Light-Duty Vehicles and
Light-Duty Trucks (Notice of Proposed Rule)

Control of Air Pollution From New Motor Vehicles               June 28, 1993
and New Motor Vehicle Engines: Evaporative Emission
Regulations for Gasoline and Methanol-Fueled Light-
Duty Vehicles and Light-Duty Trucks and Heavy-Duty
Vehicles (Notice of Technical Correction on FRM)

Draft Acid Rain Permits Public Comment Period                  June 28, 1993
(Notice of Correction)

Intent to Form an Advisory Committee to Negotiate              June 25, 1993
Small Nonroad Engine Regulations Under the Federal
Advisory Committee Act (FACA)

Control of Air Pollution from New Motor Vehicles               June 23, 1993
and New Motor Vehicle Engines; Regulations Requiring
On-Board Diagnostic Systems in 1994 and Later Model
Year Light-Duty Vehicles and Light-Duty Trucks
(Notice of Public Workshop and Reopening of 
Comment Period)

Standards of Performance for New Stationary Sources            June 21, 1993
and Guidelines for Control of Existing Sources:
Municipal Solid Waste Landfills (Notice of
Availability of New Information for NPRM)

Control of Air Pollution from New Motor Vehicles               June 17, 1993
and New Motor Vehicle Engines; Refueling Emission
Regulations for Light-Duty Vehicles and Trucks and
Heavy-Duty Vehicles (Notice of Change in Date for
Public Hearing and Additional Request for Comment
on Proposed On-Board Refueling Vapor Recovery 
Regulations)

Approval of State Programs and Delegation of                   June 16, 1993
Federal Authorities EPA is Required to Publish
Under Section 112(l) of the CAA Amendments
(Notice of Public Hearing and Extension of
Public Comment Period)

Draft Acid Rain Permits (Notice of Draft Permit                June 11, 1993
and Public Comment Period)

Control of Air Pollution from New Motor Vehicle                June 10, 1993
Engines; Gaseous and Particulate Emission
Regulations for 1994 and Later Model Year Light-
Duty Vehicles and Light-Duty Trucks (Notice of 
Final Rule; Technical Amendments)

Oxygenated Gasoline; Utah Waiver Application and               June 10, 1993
Proposed Establishment of Control Periods for the
Salt Lake/Ogden, MSA (Notice of Public Hearing)

Grand Canyon Visibility Transport Commission and               June 10, 1993
and Operations Committee (Notice of Meetings)

Clean Fuel Fleet Emission Standards, and General               June 10, 1993
Provisions and Amended Heavy-Duty Averaging,
Banking, and Trading Credit Accounting
Regulations (Notice of Proposed Rule)

Acid Rain Program; Announcement of Open Meeting                June 9, 1993
on Continuous Emission Monitoring (CEM) Data
Acquisition and Handling Systems (SAHS)
Certification, and Electronic and Magnetic Data
Reporting for the CEM Rule

In-Use Urban Bus Testing Program (Notice of                    June 8, 1993
Availability of Advisory Circular)

Health and Environmental Standards for Uranium                 June 8, 1993
and Thorium Mill Tailings (Notice of Proposed
Rule)

Prevention of Significant Deterioration (PSD)                  June 3, 1993
for Particulate Matter (PM-10) (Notice of Final
Rule)

Draft List of Categories and Regulatory Schedule              June 2, 1993
for Air Emissions from Other Solid Waste
Incinerator Units under Section 129 of the CAA
(Notice of Availability)

Control of Air Pollution from New Motor Vehicles               May 27, 1993
and New Motor Vehicle Engines; Refueling Emission
Regulations for Light-Duty Vehicles and Trucks and
Heavy-Duty Vehicles (Notice of Public Hearing and
Reopening of Comment Period on Proposed Onboard 
Vapor Recovery Regulations)

Control of Air Pollution from New Motor Vehicles               May 24, 1993
and New Motor Vehicle Engines; Federal Test
Procedure Review (Notice of Availability of a
Preliminary Report, EPA Document #420-R-93-007,
and Solicitation of Comments)

Air Pollution Control; Motor Vehicle Emission                  May 20, 1993
Factors (Notice of Availability of Updated and
Corrected Highway Motor Vehicle Emission Factor
Model MOBILE5a)

Request for Nominations for Essential Use                      May 20, 1993
Exemptions for CFCs, Methyl Chloroform, Carbon
Tetrachloride, and HBFCs

Approval of State Programs and Delegation of                   May 19, 1993
Federal Authorities EPA is Required to Publish
Under Section 112(l) of the CAA Amendments
(Notice of Proposed Rule)

Regulation of Fuels and Fuel Additives Standards               May 18, 1993
for Reformulated Gasoline and Conventional
Gasoline (Notice of Extension of Comment Period
and Public Workshop)

Control of Air Pollution from New Nonroad Mobile               May 17, 1993
Sources; Determination of Significance for
Nonroad Sources and Emission Standards for
Oxides of Nitrogen and Smoke from New Nonroad
Compression-Ignition Engines At or Above 50
Horsepower (Notice of Proposed Rule)

Economic Incentive Program Rules/Interim                       May 14, 1993
Guidance on the Generation of Mobile Source
Emission Reduction Credits (Extension of Public
Comment Period)

Protection of Stratospheric Ozone; Refrigerant                 May 14, 1993
Recycling Program Under Section 608 of the
CAA Amendments (Notice of Final Rule)

Protection of Stratospheric Ozone; Significant                 May 12, 1993
New Alternatives Policy (SNAP) Program on
Substitutes for Ozone Depleting Compounds Under
Section 612 of CAA Amendments (Notice of
Proposed Rule)

Clean Air Act; Acid Rain Provisions; 1993                      May 10, 1993
EPA SO2 Allowance Auctions Results

Motor Vehicle-Related Air Toxics Study                         May 7, 1993
(Notice of Availability)

CAA Contractor Access to Confidential Business                 May 6, 1993
Information (Notice)

National Emission Standards for Hazardous Air                  May 6, 1993
Pollutants; Compliance Extensions for Early
Reductions (Notice of Complete Enforceable
Commitments Received Through April 6, 1993)

Approval of Colorado's Petition To Relax the                   April 30, 1993
Federal Reid Vapor Pressure Volatility Standard
for Colorado in 1992 and 1993 (Notice of Final
Rule)

Amended Schedule for the Phaseout of Ozone-                    April 28, 1993
Depleting Substances and Request for Comment
on the Allowance Level for 1995 Class I, Group I
Substances (Notice Extending the Deadline for
Submission of Comments on the 3/18/93 NPRM)

CAA Contract Access to Confidential Business                   April 27, 1993
Information (Notice)

Availability of Draft Model V Operating Permits                April 27, 1993
(Notice of Availability)

Oxygenated Gasoline; Waiver Application Submitted              April 23, 1993
by the State of California (Notice of Public
Hearing)

Retrofit/Rebuild Requirements for 1993 and Early               April 21, 1993
Model Year Urban Buses; Fuel Quality Regulations
for Certification Diesel Test Fuel (Notice of
Final Rule)

National Ambient Air Quality Secondary Standards               April 21, 1993
for Sulfur Oxides (Notice of Final Decision)

Protection of Stratospheric Ozone; Federal                     April 12, 1993
Procurement Requirements Under Section 613
of the CAA Amendments (Notice of Proposed Rule)

Control of Air Pollution From New Motor                        April 12, 1993
Vehicles and New Motor Vehicle Engines;
Nonconformance Penalties for Heavy-Duty Engines
and Heavy Light-Duty Trucks (Notice Re-opening
Comment Period)

Model Standards and Techniques for Control of                  April 12, 1993
Radon in New Buildings (Notice publishes
standards for public review and comment as
required by section 304 of Title III of the
Toxic Substances Control Act)

Proposed Model Construction Standards and                      April 7, 1993
Techniques for Control of Radon in New Buildings
(Public Review and Comment)

CAA Advisory Committee (Notice of Special                      April 6, 1993 
Meeting)

Regulation of Fuels and Fuel Additives; Standards              April 1, 1993
for Reformulated Gasoline and Conventional 
Gasoline (Notice of Public Hearing and Notice of
Correction for Proposed Rule)

National Emission Standards for Hazardous Air                  March 31, 1993
Pollutants; Halogenated Solvent Emissions from
Organic Solvent Cleaners (Public Review and Comment)

Control of Air Pollution from New Motor Vehicle and            March 24, 1993
New Motor Vehicle Engines; Particulate Emission
Regulations for 1993 Model Year Buses, Particulate
Emission Regulations for 1994 and Later Model Year
Urban Buses, and Oxides of Nitrogen Emission
Regulations for 1998 and Later Model Year Heavy-
Duty Engines (Notice of Final Rule)

Control of Air Pollution from New Motor Vehicles               March 24, 1993
and New Motor Vehicle Engines; Evaporative
Emission Regulations for Gasoline and Methanol-
Fueled Light-Duty Vehicles, Light-Duty Trucks and
Heavy-Duty Vehicles (Notice of Final Rule)

National Emission Standards for Hazardous Air                  March 23, 1993
Pollutants (NESHAP) for Benzene Waste Operations;
request for comment on possible future rulemaking
to propose alternative compliance option for NESHAP:
Benzene (Advance Notice of Proposed Rule)

Acid Rain Allowance Allocations and Reserves                   March 23, 1993
(Notice of Final Rule)

Notice of Availability of the National Allowance               March 23, 1993
Data Base (Notice announces final data base
upon which the Agency is basing the allowance
allocations)

Environmental Radiation Protection Standards for               March 22, 1993
the Management and Disposal of Spent Nuclear Fuel,
High-Level and Transuranic Radioactive Wastes
(Extension of Public Comment Period)

Criteria for the Certification of Compliance                   March 22, 1993
with Environmental Radiation Protection Standards
for the Management and Disposal of Spent Nuclear
Fuel, High-Level and Transuranic Radioactive
Wastes (Extension of Public Comment Period)

Protection of Stratospheric Ozone:			       March 18, 1993
Accelerating the Phaseout of Class I &
Class II Ozone Depleting Substances
and Adding Methyl Bromide and Hydro-
bromofluorocarbons to Class I
(Notice of Proposed Rule)

Volatility Regulations for Gasoline &			       March 17, 1993
Alcohol Blends (Notice of Final Rule)

Codification of Corresponding Onshore Area		       March 16, 1993
Designations and Notice of Convening
Proceeding for Reconsideration of Certain
Corresponding Onshore Area Designations

Motor Vehicle Certification Short Test			       March 15, 1993
and Performance Warranty Procedures
(Extension of Comment Period and Notice 
of Availability)

Grand Canyon Visibiliby Transport			       March 15, 1993
Commission Work Plan Committees
(Notice of Meetings)

Determining  Conformity of General			       March 15, 1993
Federal Actions to State or Federal 
Implementation Plans (Notice of
Proposed Rule)

Special Exemptions from Requirements;	      		       March 12, 1993
Section 325(a) of the CAA Territory
of Guam	(Notice of Proposed Rule)

Final Documents: Employee Commute	                       March 12, 1993 
Options Guidance (Notice of Avaiilability)

CAA Contractor Access to Confidential                          March 12, 1993
Business Information (Notice)

Regulation of Fuels and Fuel Additives: Standards              March 11, 1993
for Fuel Quality-Sulfur Content; and Control of
Air Pollution from New Motor Vehicles and New Motor
Vehicle Engines: Standards for Oxides of Nitrogen 
Emissions from Heavy-Duty Diesel Engines and Correction
of Type 2-D Diesel Test Fuel Specification for Light-
Duty Vehicles, Light-Duty Trucks and Heavy-Duty Engines 
(Announcement of Public Meeting on Enforcement of Diesel
Desulfurization Regulations)

National Ambient Air Quality Standards for                     March 9, 1993
Ozone (Notice of Final Decision)

Section 185B Report on Tropospheric Ozone		       February 26, 1993
(Notice of Report for Public Review)

Regulation of Fuel and Fuel Additives: Standards               February 26, 1993
for Reformulated Gasoline (Notice of Proposed Rule)

New Source Review Simplification Workshop                      February 26, 1993
(Notice of Public Meeting)

National Emission Standards for Hazardous Air                  February 24, 1993
Pollutants (HAP) for Source Categories: Organic
Hazardous Air Pollutants from the Synthetic
Organic Chemical Manufacturing Industry (SOCMI)
(Notice of Public Hearing & Extension of Public 
Comment Period)

Control of Air Pollution from New Motor                        February 24, 1993
Vehicles and New Motor Vehicle Engines; Federal 
Test Procedure (FTP) Review (Notice of Public
Workshop)
 
National Emission Standards for Hazardous                      February 23, 1993
Air Pollutants; Compliance Extensions for Early
Reductions (Notice of Complete Enforceable
Commitments Received Through 1/7/93)

Interim Guidance on the Generation of Mobile                   February 23, 1993
Source Emission Reduction Credits (Notice of
Proposed Guidance for Comment)

Economic Incentive Program (Notice of                          February 23, 1993
Proposed Rule and Notice of Public Hearing)

Control of Air Pollution from New Motor Vehicles and           February 22, 1993
New Motor Vehicle Engines; Federal Test Procedure 
(FTP) Modifications (Notice of Availability)

Control of Air Pollution from New Motor Vehicles and           February 19, 1993
New Motor Vehicle Engines; Regulations Requiring
On-Board Diagnostic Systems on 1994 and Later Model
Year Light-Duty Vehicles and Light-Duty Trucks (Notice
of Final Rule)

Ambient Air Quality Surveillance; Revise Regulations	       February 12, 1993
to Include Provisions for the Enhanced Monitoring of 
Ozone (Notice of Final Rule)

Environmental Radiation Protection Standards for	       February 11, 1993
the Management and Disposal of Spent Nuclear
Fuel, High-Level Wastes (Notice of Public Hearings on
Proposed Standards and Establishment of Dockets)

Criteria for the Certification of Compliance with              February 11, 1993
Environmental Radiation Protection Standards for 
Management and Disposal of Spent Nuclear Fuel, High-Level
& Transuranic Radioactive Wastes (Advance Notice of 
Proposed Rule)

Protection of Stratospheric Ozone; Labeling 		       February 11, 1993
Requirements for Products Manufactured with, 
Containers of, and Products Containing Specific
Ozone-Depleting Substances Pursuant to Section 611
of the CAA, as Amended (Notice of Final Rule)

Regulations Governing Prior Notice of Citizen                  February 10, 1993
Suits Brought Under Section 304 of the Clean
Air Act (Notice of Proposed Rule)

Environmental Radiation Protection Standards	               February 10, 1993
for the Management and Disposal of Spent Nuclear
Fuel, High-Level and Transuranic Radioactive
Wastes (Notice of Proposed Rule)

Air Pollution Control; Motor Vehicle Emission                  February 9, 1993
Factors (Notice of MOBILE5 Model Availability)

Request for Nominations for Essential Use                      February 2, 1993
Exemption for Halons 1211, 1301, and 2402

Acid Rain Program; Nitrogen Oxides Emission                    January 25, 1993
Reduction Program (Extend Public Comment Period)

Protection of Stratospheric Ozone; Ban of                      January 15, 1993
Nonessential Products Releasing Class I Ozone-
Depleting Substances Under Section 610 of the CAA,
as Amended (Notice of Final Rule)

Motor Vehicle-Related Air Toxics Study                         January 13, 1993
(Notice of Availability of Public Review Draft)

California State Motor Vehicle Pollution Control               January 13, 1993
Standards; Waiver of Federal Preemption (Decision)

Hazardous Air Pollutants List; Denying a Petition              January 13, 1993
to Remove Five Specific Substances from the Category
of Glycol Ethers as Listed in CAA Section 112(b)(1)
(Notice of Denial)

Control of Air Pollution from New Motor Vehicles               January 12, 1993
and New Motor Vehicle Engines; Regulations for
Light-Duty Vehicle and Light-Duty Trucks 1994,
1995, and 1996 Model Year Durability Testing
Procedures, and Later Model Year Allowable
Maintenance (Notice of Final Rule)

Criteria and Procedures for Determining Conformity             January 11, 1993
to State or Federal Implementation Plans, Programs,
and Projects Funded or Approved Under Title 23 U.S.C.
or the Federal Transit Act (Notice of Proposed Rule)

Acid Rain Program: General Provisions and Permits,             January 11, 1993
Allowance System, Continuous Emissions Monitoring,
Excess Emissions and Administrative Appeals
(Notice of Final Rule)

Control of Air Pollution from New Motor Vehicles               January 8, 1993
and New Motor Vehicle Engines; Gaseous and
Particulate Emission Regulations for 1994 and Later
Model Year Light-Duty Vehicles and Light-Duty Trucks,
and Revised Performance Warranty Regulations;
Addition of Certification Short Test Standards
and Procedures (Notice of Proposed Rule)

Air Quality Designations and Classifications                   January 8, 1993
Amendments; Reclassification of Moderate PM-10
Nonattainment Areas to Serious Areas
(Notice of Final Rule)

National Emission Standards for Hazardous Air                  January 7, 1993
Pollution; Benzene Waste Operations
(Notice of Final Rule)

National Emission Standards for Hazardous Air                  January 5, 1993
Pollutants; Coke Oven Batteries (Notice of
Public Hearing)

Meeting of the Grand Canyon Visibility Transport               January 5, 1993
Commission Work Plan Committees (Notice of
Meeting)

National Emission Standards for Hazardous                      December 31, 1992
Air Pollutants for Source Categories; Organic
Hazardous Air Pollutants from the Synthetic
Organic Chemical Manufacturing Industry and Seven
Other Processes (Notice of Proposed & Notice of
Public Hearing)

National Emission Standards for Hazardous Air                  December 29, 1992
Pollutants; Compliance Extensions for Early
Reductions (Notice of Final Rule)

Standards for Emissions from Natural Gas-Fueled                December 29, 1992
and Liquified Petroleum Gas-Fueled Motor Vehicles
and Motor Vehicle Engines, and Certification Procedures
for Aftermarket Conversion Hardware (Notice of Extension
of Comment Period)

Test Methods for Measurement of VOC Capture Efficiency         December 29,1992
(Notice of Availability of Draft Revised Test Methods)

National Emission Standards for Hazardous Air                  December 23, 1992
Pollutants; Amendments to Vinyl Chloride Final Rule
(Correction Notice)

National Emissions Standards for Hazardous Air                 December 22, 1992
Pollutants (Correction Notice to include MOU
as an attachment to NPRM to Rescind Subpart I
of 40 CFR Part 61 as it Applies to Facilities
Licensed by the Nuclear Regulatory Commission)

Credit Program for California Pilot Test Program               December 17, 1992
(Notice of Final Rule)

Protection of Stratospheric Ozone; Refrigerant                 December 10, 1992
Recycling

National Emission Standards for Hazardous Air                  December 9, 1992
Pollutants; Compliance Extensions for Early
Reductions (Notice of Complete Enforceable
Commitments Received Through October 1992)

Regulation of Fuels and Fuel Additives; Standards              December 8, 1992
for Reformulated Gasoline and Conventional
Gasoline (Notice of Public Workshop)

Operating Permit Program; OMB Approval                         December 4, 1992 
of Information Requirements (Notice of Technical
Amendments)

National Emission Standards for Hazardous Air                  December 4, 1992
Pollutants for Source Categories; Coke Oven
Batteries (Notice of Proposed Rule)

National Emission Standards for Hazardous Air                  December 4, 1992
Pollutants; Coke Oven Emissions from By-Product
Coke Oven Charging, Door Leaks, and Topside Leaks
on Wet-Coal Charged Batteries (Proposed Rule; Notice 
of Withdrawl)

National Emission Standards for Hazardous Air                  December 1, 1992
Pollutants (Notice of Proposed Rule to Rescind 
Subpart I of 40 CFR Part 61 as it Applies to 
Facilties Licensed by the Nuclear Regulatory
Commission)

Designations of Areas for Air Quality Planning                 November 30, 1992
Purposes (Notice of Final Rule Amendments and 
Corrections)

State Implementation Plans; Nitrogen Oxides                    November 25, 1992
Supplement to the General Preamble; Clean Air 
Amendments of 1990; Implementation of Title I
(Notice of Proposed Rule)

Acid Rain Program; Nitrogen Oxides Emission                    November 25, 1992
Reduction Program (Notice of Proposed Rule
and Notice of Public Hearing)

Clean Air Act; Contractor Access to Confidential               November 23, 1992
Business Information (Notice)

Grand Canyon Visibility Transport Commission                   November 18, 1992
Work Plan Committees (Notice of Meeting)

National Emission Standards for Hazardous Air                  November 9, 1992
Pollutants; Compliance Extensions for Early
Reductions (Notice of Complete Enforceable
Commitments Received through September 1992)

Vehicle Inspection and Maintenance Requirements                November 5, 1992
(Notice of Final Rule)

Standards for Emissions from Natural Gas-Fueled,               November 5, 1992
and Liquefied Petroleum Gas-Fueled Motor Vehicles
and Motor Vehicle Engines, and Certification 
Procedures for Aftermarket Conversion Hardware
(Notice of Proposed Rule)

Tehnical Guidance Documents for Particulate                    November 3, 1992
Matter (Notice announcing availability of three
technical guidance documents for control of PM-10
emissions from fugitive dust, residential wood and
prescribed burning)

State Implementation Plans for Nonattainment                   October 27, 1992 
Areas for Sulfur Dioxide (Notice announcing
findings of failure to submit required SIPs)

Air Quality; Revision to Definition of Volatile                October 26, 1992
Organic Compounds (Notice of Proposed Rule)

Oxygenated Fuels Labeling Regulations Under Section            October 20, 1992
211(m) of the CAA as Amended (Notice of Final
Rulemaking)

Regulation of Fuel and Fuel Additives; Administrator's         October 20, 1992
Finding That No Control or Prohibition on Maximum
Oxygen Content of a Winter Oxygenated Gasoline
Program is Necessary Under Section 211(c)(4)(A) of the
CAA as Amended (Notice of Proposed Finding)

Guidelines for Oxygenated Gasoline Credit Programs             October 20, 1992
and Guidelines on Establishment of Control Periods
Under Section 211(m) of the CAA as Amended (Notice
of Availability of Guidance Documents)

National Air Pollution Control Techniques Advisory             October 13, 1992
Committee (Notice of Open Meeting)

Regulation of Fuels and Fuel Additives; Standards              October 8, 1992
for Reformulated Gasoline (Notice of application
for extension of the Reformulated Gasoline Program
to the Dallas/Forth Worth area in the State of Texas)

Clean Air Act; Acid Rain Provisions (Notice of                 October 7, 1992
delegation of administration of auctions and
sales under section 416 of the CAAA from the
Administrator of EPA to the Chicago Board of Trade)

Approval and Promulgation of Implementation Plans;             October 7, 1992
Appendix M, Addition of Method for Measurement of
Opacity Emissions From Stationary Sources (Notice
of Proposed Rule and Notice of Public Hearing)

Ambient Air Quality Surveillance Regulations                   October 6, 1992
(Notice of Proposed Rulemaking)

Fuels and Fuel Additives (Notice of Waiver                     October 5, 1992
Application from Lubrizol Corporation for Diesel
Additive Labeled EZ-ADDtm)

Clean Air Act; Contractor Access to Confidential               October 5, 1992
Business Information (Notice)

National Emission Standards for Hazardous Air                  October 1, 1992
Pollutants for Source Categories: Perchloroethylene
Emissions from Dry Cleaning Facilities
(Notice of Availability of New Information)

Fuel and Fuel Additives; Proposed Testing Program              Sept. 29, 1992
for Vehicles Utilizing Fuels Containing MMT
(Notice of Public Workshop)

Standards of Performance for New Stationary                    Sept. 28, 1992
Sources; Calciners and Dryers in Mineral
Industries (Notice of Final Rule)

Criteria for Exercising Discretionary Sanctions                Sept. 28, 1992
Under Title I of the Clean Air Act (Notice of
Proposed Rule)

National Emission Standards for Hazardous Air                  Sept. 24, 1992
Pollutants; Draft Schedule for the Promulgation
of Emission Standards (Notice of Availability)

Clean Air Act; Contractor Access to Confidential               Sept. 23, 1992
Business Information (Notice of Intent to Transfer
Information to Subcontractor)

Designations of Areas for Air Quality Planning                 Sept. 22, 1992
Purposes (Notice of Proposed Rule)

Hazardous Waste Treatment, Storage, and Disposal               Sept. 18, 1992
Facilities; Organic Air Emission Standards for Tanks,
Surface Impoundments, and Containers (Notice of
Data Availability)

National Emission Standards for Hazardous Air                  Sept. 18, 1992
Pollutants (Notice of Proposed Rule to Stay the
Effectiveness of Subpart I of 40CFR60 as it is
applied to Facilities Other Than Commercial
Nuclear Power Reactors Licensed by NRC)

National Emission Standards for Hazardous Air                  Sept. 17, 1992
Pollutants; Compliance Extensions for Early
Reductions (Notice of Complete Enforceable
Commitments Received Through 7/31/92)

Outer Continental Shelf Air Regulations                        Sept. 4, 1992
(Notice of Final Rule)

Acid Rain Advisory Committee; Subcommittee on                  Sept. 3, 1992
Conservation Verification (Notice of Open Meeting)

Contractor Access to Confidential Information                  Sept. 1, 1992
(Notice of Intent to Transfer Information
to Subcontractor)

Clean Air Act Advisory Committee                               August 28, 1992
(Notice of Open Meeting)

Notice of Decision Regarding Waiver Preemption                 August 25, 1992
for California's Methanol Vehicle Regulations

Notice of Decision Regarding Waiver Preemption                 August 25, 1992
for California's Amendment to its Warranty
Statute and Regulations

Regulation of Fuels and Fuel Additives Standards               August 20, 1992
for Reformulated Gasoline and Conventional Gasoline
(Notice of public workshop to help develop EPA's
complex emissions model)

Transportation and Air Quality Planning		               August 18, 1992 
Guidelines 

Technical Characteristics, Emissions, and General              August 13, 1992
Regulatory Issues Related to Nonroad Engines under
50 Horsepower (Notice of Meeting)

Clean Air Act; Contractor Access to Confidential               August 10, 1992
Business Information (Notice of Intent to Transfer
Information to Subcontractor)

National Ambient Air Quality Standards for Ozone;              August 10, 1992
(Proposed Decision Not to Revise)

National Emission Standards for Hazardous Air                  August 3, 1992
Pollutants; Compliance Extensions Early Reductions
(Notice of Complete Enforceable Commitments
Received)

Ozone Design Value Study of the Clean Air Act                  August 3, 1992
Amendments of 1990 (Notice of Public Meeting)

Protection of Stratospheric Ozone; Final Rule                  July 30, 1992
(Implements the 1992 and later requirements of
section 604, as well as the related provisions of
sections 603, 607 and 616)

Vehicle Inspection and Maintenance Requirements for            July 28, 1992
State Implementation Plans (Notice of availability
of regulatory text, location of public hearing site
and correction of proposed rule)

New Source Review Simplification Workshop                      July 28, 1992

Control of Air Pollution from New Motor Vehicles and           July 27, 1991
New Motor Vehicle Engines; in the matter of
Particulate Emission Regulations for 1993 Model Year
Buses, Particulate Emission Regulations for 1994 and
Later Model Year Urban Buses, Retrofit/Rebuild
Requirements for 1993 and Earlier Model Year Urban
Buses, Test Procedures for Urban Buses, and Oxides of
Nitrogen Emission Regulations for 1998 and Later Model
Year Heavy-Duty Engines (Notice of Reopening of Comment
Period and Public Workshop)

Operating Permit Program (Notice of Final Rule)                July 21, 1992

Requirements for Preparation, Adoption and Submittal of        July 21, 1992   
Implementation Plans; Approval and Promulgation of 
Implementation Plans; and Standards of Performance for 
New Stationary Sources (WEPCO)(Notice of Final Rule)

California State Motor Vehicle Pollution Control               July 21, 1992
Standards; Opportunity for Written Comments on
Additional Information Submitted to the Public
Docket of the Low-Emission Vehicle Standards
Waiver Request

Diesel Fuel Sulfur Content Petition for Exemption              July 20, 1992
(Notice of Final Decision)

Control of Air Pollution from New Motor Vehicles               July 17, 1992
and New Motor Vehicle Engines; Interim
Regulations for Cold Temperature Carbon Monoxide
Emissions from 1994 and Later Model Year
Gasoline-Fueled Light-Duty Vehicles and Light-Duty
Trucks (Notice of Final Rule)

Initial List of Categories of Source under                     July 16, 1992
Section 112(c)(1) of the CAA Amendments

Draft Lead and Particulate Matter Addendum to the              July 16, 1992
General Preamble for Title I of the CAA Amendments of
1990 and Staff Work Products Providing Technical
Guidance for PM-10 Best Available Control Measures
(Notice announcing availability of documents and of 
public meeting)

Diesel Fuel Sulfur Content; Petition for Exemption	       July 15, 1992
from American Samoa (Notice of Final Decision)

Regulation of Fuels and Fuels Additives; Standards             July 14, 1992
for Reformulated and Conventional Gasoline (Notice
to Extend Comment Period)

Protection of Stratospheric Ozone; Standards and               July 14, 1992
Requirements for Servicing of Motor Vehicle Air
Conditioners (Notice of Final Rule)

Vehicle Inspection and Maintenance Requirements for            July 13, 1992
State Implementation Plans (Notice of Proposed Rule)

Standards of Performance for New Stationary Sources;           July 10, 1992
Appendix A Reference Methods; Amendments to
Method 24 for the Determination of Volatile
Matter Content, Water Content, Density, Volume
Solids, and Weight Solids of Source Coatings
(Notice of Final Rule)

Acid Rain Allowance Allocations and Reserves                   July 7, 1992
(Notice of Proposed Rule)

Acid Rain Provisions [Notice of Availability;                  July 7, 1992
Final Version of the National Allowance Data
Base (NADB V 2.1) and Accompanying Technical
Support Documents]

Motor Vehicle and Engine Compliance Fees for:                  July 7, 1992
Light-Duty Vehicles and Trucks; Heavy-Duty
Vehicles and Engines; and Motorcycles
(Notice of Final Rule)

Marine Engines and Vessels (Notice of Public                   June 29, 1992
Workshop)

Air Pollution Control; Motor Vehicle Emission                  June 22, 1992
Factors (Notice of Public Workshop Mobile5)

Nonroad Engines and Vehicles (Notice of Meeting)               June 22, 1992

California State Motor Vehicle Pollution Control               June 11, 1992
Standards; Waiver of Federal Preemption, Decision

Standards of Performance for New Stationary                    June 10, 1992
Sources; Appendix A Test Method 26 (Final Rule;
Correcting Amendment)

Control of Air Pollution from New Motor Vehicles               June 9, 1992
and New Motor Vehicle Engines; Regulations
Requiring On-Board Diagnostic Systems on 1994
and Later Model Year Light-Duty Vehicles and
Light-Duty Trucks (Notice of Public Workshop
and Reopening of Comment Period)

Regulation of Fuels and Fuel Additives Standards               June 5, 1992
for Reformulated Gasoline (Notice of Application
for Extension of Reformulated Gasoline Program
to the District of Columbia)

National Emission Standards for Hazardous Air                  June 3, 1992
Pollutants; National Emission Standards for
Radon Emissions from Phosphogypsum Stacks
(Notice of Final Rule)

Control of Pollution from New Motor Vehicles and               May 29, 1992
New Motor Vehicle Engines; Nonconformance
Penalties for Heavy-Duty Engines and Heavy-Duty
Vehicles, Including Heavy Light-Duty Trucks
(Notice of Proposed Rule)

Final Documents; Information Regarding the                     May 29, 1992
Formulation and Emission Reduction Potential
of Transportation Control Measures (Notice of
Availability)

Regulation of Fuels and Fuel Additives Standards               May 28, 1992
for Reformulation and Conventional Gasoline
(Proposed Rule; Relocation and Rescheduling
of Public Hearing and Extension of Comment Period)

National Emission Standards for Hazardous Air                  May 20, 1992
Pollutants Benzene Waste Operations (Correction
to Proposal)

National Emission Standards for Hazardous Air                  May 15, 1992
Pollutants; Compliance Extensions for Early
Reductions (Notice of Complete Enforceable
Commitments Received)

Approval of Colorado's Petition to Relax the                   May 12, 1992
Federal Reid Vapor Pressure Volatility Standards
for Colorado in 1992 and 1993 (Notice of Proposed
Rule)

Colorado Petition to Relax Colorado Reid Vapor                 May 12, 1992
Pressure Standard (Temporary Direct Final Rule)

State Implementation Plans for Nonattainment Areas             May 8, 1992
for Particulate Matter (Notice Announcing Findings
of Failure to Submit Required State Implementation
Plans)

Regulation of Fuels and Fuel Additives; Standards              May 7, 1992
for Highway Diesel Fuel Quality-Sulfur Content; and
Control of Air Pollution from New Motor Vehicles and
New Motor Vehicle Engines: Standards for Oxides of
Nitrogen Emissions from Heavy-Duty Diesel Engines,
and Correction of Type 2-D Diesel Test Fuel
Specification for Light-Duty Vehicles, Light-Duty
Trucks and Heavy-Duty Engines (Notice of Final Rule)

Protection of Stratospheric Ozone; Labeling of                 May 4, 1992
Products using Ozone-Depleting Chemicals
(Notice of Proposed Rule)

Control of Air Pollution from New Motor Vehicles               April 30, 1992
and New Motor Vehicle Engines; Regulations for
Light-Duty Vehicle and Light-Duty Truck 1994 and
1995 Model Year Durability Testing Procedures and
1994 and Later Model Year Allowable Maintenance
(Notice of Proposed Rule)

Supplemental - State Implementation Plans; General             April 28, 1992
Preamble for the Implementation of Title I of the
Clean Air Act Amendments of 1990 (Appendices to the
Proposed General Preamble published 4/16/92)

Clean Air Act Advisory Committee (Notice of Meeting)           April 24, 1992

Stratospheric Ozone Protection; Standards and                  April 22, 1992
Requirements Regarding the Servicing of Motor
Vehicle Air Conditioners and Restrictions on the
Sale of Small Containers of Class I or Class II
Substances Pursuant to Section 609 of the CAA as
Amended (Notice of Proposed Rule)

Approval and Promulgation of Implementation Plans;             April 17, 1992
Proposed Partial Disapproval of New Jersey
Implementation Plan for Ozone (Notice of
Hearing)

Guidelines for Oxygenated Gasoline Waivers under               April 17, 1992
Section 211(m)(3)(C) of the Clean Air Act as
Amended (Notice of Availability of Guidelines)

State Implementation Plans; General Preamble for               April 16, 1992
the Implementation of Title I of the Clean Air
Act Amendments of 1990 (Notice of Proposed Rule)

Regulation of Fuel and Fuel Additives; Standards               April 16, 1992
for Reformulated and Conventional Gasoline
(Notice of Proposed Rule)

Fuel and Fuel Additives Registration; Health                   April 15, 1992
and Emission Effects Testing Protocol
(Notice of Proposed Rule)

Control of Air Pollution from New Motor Vehicles               April 15, 1992
and New Motor Vehicle Engines; Refueling Emission
Regulations for Gasoline-Fueled Light-Duty Vehicles
and Trucks and Heavy-Duty Vehicles (Final Agency
Action Pursuant to Section 202(a)(6) of the Clean
Air Act Regarding Onboard Control of Refueling Emissions)

Control of Air Pollution from New Motor Vehicles               April 15, 1992
and New Motor Vehicle Engines; Refueling Emission
Regulations for Gasoline-Fueled Light-Duty Vehicles
and Trucks and Heavy-Duty Vehicles (Notice notifies
readers that because of EPA's final action involved
in part the decision not to issue the rule initially
proposed, that action is printed in the proposed rule
section of the Federal Register)

Ambient Air Quality Surveillance; Enhanced Ozone               April 3, 1992
Monitoring Regulations (Notice of Extension of
Comment Period)

Regulation of Fuels and Fuel Additives; Standards              April 1, 1992
for Reformulated Gasoline (Notice of Application
for Extension of Reformulated Gasoline Program
to New Jersey, Delaware, and Maryland)

Control of Air Pollution from New Motor Vehicle                March 31, 1992
Engines; Regulations Requiring On-Board
Diagnostic Systems on 1994 and Later Model Year
Light-Duty Vehicles and Light-Duty Trucks (Notice
Reopening Comment Period)

Clean Air Act; Contractor Access to Confidential               March 27, 1992
Business Information (Notice of Intended Transfer
of Confidential Business Information to Contractors)

Regulation of Fuels and Fuel Additives; Standards              March 25, 1992
for Reformulated Gasoline and Conventional
Gasoline (Notice of Public Workshop)

Section 187 Vehicle Miles Traveled (VMT)                       March 19, 1992
Forecasting and Tracking Guidance (Notice of
Availability)

Clean Air Act Advisory Committee                               March 10, 1992
(Notice of Special Meeting)

Acid Rain Advisory Committee; Subcommittee on                  March 10, 1992
Conservation Verification (Notice of Open
Meeting)

Regulation of Fuels and Fuel Additives; Standards              March 5, 1992
for Reformulated Gasoline (Notice of Application for
Extension of Reformulated Gasoline Program to New York)

National Emission Standards for Hazardous Air                  March 5, 1992
Pollutants; Benzene Waste Operations (Notice of
Final Rule -- Stays the effectiveness of Subpart
FF of 40CFR61 until final action is taken on
clarifying amendments to Subpart FF)

National Emission Standards for Hazardous Air                  March 5, 1992
Pollutants; Benzene Waste Operations (Notice of
Proposed Rule -- Amendments to Subpart FF designed
to clarify provisions of the rule that have been
widely misunderstood by affected sources)

Ambient Air Quality Surveillance; Enhanced Ozone               March 4, 1992
Monitoring Regulations (Notice of Proposed Rule)

Control of Air Pollution from New Motor Vehicles               February 21, 1992
and New Motor Vehicle Engines; Evaporative Emission
Regulations for Gasoline and Methanol-Fueled Light-Duty
Vehicles and Light-Duty Trucks and Heavy-Duty Vehicles
(Notice of Extension of Comment Period)

Regulation of Fuels and Fuel Additives; Standards              February 14, 1992
for Reformulated Gasoline and Conventional Gasoline
(Notice of Public Workshop)

Nonroad Engines and Vehicles Under 50 Horsepower               February 14, 1992
(Notice of Public Workshop)

Air Pollution Control; MOBILE5 Motor Vehicle                   February 14, 1992
Emission Factor Model (Notice of Public Workshop)

Small Business Stationary Source; Technical and                February 5, 1992
Environmental Compliance Assistance Program
(Notice of Availability of Final Guidelines for
Implementation of Section 507 of the CAA as Amended)

Supplemental Notice of Proposed Guidelines                     February 5, 1992
for Oxygenated Gasoline Credit Programs under
Section 211(m) of the CAA as Amended

Supplemental Notice of Proposed Guidance on                    February 5, 1992
Establishment of Control Periods under
Section 211(m) of the CAA as Amended

Rules of Practice Governing the Administrative                 February 4, 1992
Assessment of Civil Penalties (Notice of Final Rule)

Acid Rain Program; Announcement of Open Meeting on             February 4, 1992
Electronic and Magnetic Data Reporting of Emissions
Data for the CEM Rule

Stratospheric Ozone Protection Advisory Committee              February 3, 1992
(Notice of Open Meeting)

Gasoline Detergent Additives Regulations                       February 3, 1992
(Notice of Public Workshop)

Requirements for Preparation, Adoption and                     February 3, 1992
Submittal of Implementation Plans; Approval and
Promulgation of Implementation Plans
(Notice of Final Rule)

Acid Rain Program; Change in Public Comment                    January 30, 1992
Period for the Core Rules

Acid Rain Advisory Committee "Opt-In" Subcommittee             January 24, 1992
(Notice of Open Meeting)

Fuel and Fuel Additives; Ethyl Corporation Waiver              January 22, 1992
Application (EPA denied Ethyl's request for waiver
for HITEC 3000)

Regulation of Fuels and Fuel Additives; Standards              January 17, 1992
for Reformulated Gasoline and Conventional Gasoline
(Notice of Public Workshop)

Stratospheric Ozone Protection; Significant New                January 16, 1992
Alternatives Policy (SNAP) Program (Request for
Data and Advance Notice of Proposed Rulemaking)

Stratospheric Ozone Protection; Ban Nonessential               January 16, 1992
Products Releasing Class I Ozone-Depleting
Substances and Require the Elimination of Emissions
from Products Using Class I Substances under
Sections 610 and 608 of the CAA, as amended
(Notice of Proposed Rulemaking)

National Emission Standards for Coke Oven Batteries            January 15, 1992
Pursuant to Section 112 of the CAA, as amended
(Establishment of Advisory Committee and Notice of
Open Meeting)

California State Motor Vehicles Pollution Control              January 9, 1992
Standards (Notice of Opportunity for Public Hearings
and Public Comment Period)

Final Ruling on Petition Submitted by the Governor             January 6, 1992
of the Virgin Islands Pursuant to Section 324(a)(1)
of the Clean Air Act

Final Report on the "Nonroad Engine and Vehicle                January 6, 1992
Emission Study" (Notice of Availability)

NESHAPS for Radionuclides; Subpart T as applied to NRC-        December 31, 1991
licensed Uranium Mill Tailings Disposal Sites (Final Rule
to Stay the Effectiveness of 40 CFR Part 61)

NESHAPS for Radionuclides; Subpart T as applied to NRC-        December 31, 1991
licensed Uranium Mill Tailings Disposal Sites (Proposal
to Rescind 40 CFR Part 61)

Health and Environmental Standards for Uranium and Thorium     December 31, 1991
Mill Tailings (ANPRM pursuant to the UMTRCA of 1978 to
amend its general environmental regulations pertaining to
Uranium Mill Tailings Disposal Sites at 40 CFR Part 192,
Subpart D)

Protection of Stratospheric Ozone; 1991 Production and         December 30, 1991
Consumption Restrictions of Ozone-Depleting Chemicals
Required by Section 604 of the CAA Amendments of 1990
(Direct Final Amendment to the Temporary Final Rule)

Control of Air Pollution from New Motor Vehicles and New       December 27, 1991
Motor Vehicle Engines: Evaporative Emission Regulations for
Gasoline- and Methanol-Fueled Light-Duty Vehicles and
Light-Duty Trucks and Heavy-Duty Vehicles (Notice of Public
Workshop; Changed Date)

Regulation of Fuels and Fuel Additives; Standards for          December 23, 1991
Reformulated Gasoline (Notice of Application for
Extension of the Reformulated Gasoline Program to
Connecticut, New Hampshire and Virginia)

Control of Air Pollution from New Motor Vehicles and New       December 23, 1991
Motor Vehicle Engines: Evaporative Emission Regulations
for Gasoline and Methanol-Fueled Light-Duty Vehicles and
Light-Duty Trucks and Heavy-Duty Vehicles (Notice of Public
Workshop; Changed Date)

Acid Rain Program: Announcement of Open Meeting on Acid        December 20, 1991
Rain Program Forms

Clean Air Act Advisory Committee (Notice of Open Meeting)      December 19, 1991

National Emission Standards for Hazardous Air Pollutants       December 19, 1991
(NESHAP); Polonium-210 Emissions from Elemental Phosphorus
Plants (Notice of Final Rule)

Preparation, Adoption, and Submittal of State Implementation   December 17, 1991
Plans; Method 202 for Measurement of Condensible Particulate
Emissions from Stationary Sources (Notice of Final Rule)

Notice of EPA Request for Delegation Proposals to Administer   December 17, 1991
the Auctions and Direct Sales Under Section 416 of the CAA
Amendments of 1990, and Request for Public Comment

Auctions, Direct Sales, and Independent Power Producers        December 17, 1991
Written Guarantee Regulations (Notice of Final Rule)

Control of Air Pollution from New Motor Vehicles and New       December 17, 1991
Motor Vehicle Engines; Evaporative Emissions Regulations for
Gasoline and Methanol-Fueled Light-Duty Vehicles and Light-Duty
Trucks and Heavy-Duty Vehicles (Notice of Public Workshop and
Report Availability)

Requirements for Preparation, Adoption, and Submittal of       December 16, 1991
Implementation Plans; Approval and Promulgation of
Implementation Plans; Standards of Performance for New
Stationary Sources (WEPCO) (Extension of Comment Period
for Proposed Rulemaking)

Control of Air Pollution from New Motor Vehicles and New       December 13, 1991
Motor Vehicle Engines; Regulations Requiring On-Board
Diagnostic Systems on 1994 and Later Model Year Light-Duty
Trucks (Extension of Comment Period)

Control Techniques Guideline Document: Reactor Processes       December 12, 1991
and Distillation Operations in the Synthetic Organic
Chemical Manufacturing Industry (Release of Draft Control
Techniques Guideline (CTG) for Public Review)

Regulation of Fuels and Fuel Additives; Standards for          December 12, 1991
Gasoline Volatility; and Control of Air Pollution from New
Motor Vehicle Engines; Standards for Particulate Emissions
from Urban Buses (Notice of Final Rule)

National Emission Standards for Hazardous Air Pollutants       December 9, 1991
Benzene Waste Operations (Notice of Proposed Rule to Stay
Effectiveness of Subpart FF of 40 CFR Part 61)

Standards of Performance for New Stationary Sources;           December 9, 1991
Perchloroethylene Dry Cleaners; Proposed Rule; Withdrawal

National Emission Standards for Hazardous Air                  December 9, 1991
Pollutants for Source Categories: Perchloroethylene
Emissions from Dry Cleaning Facilities (Notice of
Proposed Rulemaking and Notice of Public Hearing)

Outer Continental Shelf Air Regulations                        December 5, 1991
(Notice of Proposed Rulemaking)

Acid Rain Program: Permits, Allowance System,                  December 3, 1991
Continuous Emissions Monitoring, and Excell Emissions
(Notice of Proposed Rulemaking)

Requirements for Preparation, Adoption, and Submittal          November 25, 1991
of Implementation Plans; Approval and Promulgation of
Implementation Plans; Standards of Performance for New
Stationary Sources (WEPCO) (Reopening of Public Comment
Period for Proposed Rulemaking)

Reclassification of Moderate PM-10 Nonattainment               November 21, 1991
Areas to Serious Areas (Notice of Proposed Rulemaking)

Diesel Fuel Sulfur Content; Petition for Exemption             November 18, 1991
for American Samoa (Notice of Proposed Decision)

Regulation of Fuels and Fuel Additives (Notice of              November 15, 1991
Application for Extension of the Reformulated
Gasoline Program to Massachusetts and Pennsylvania)

Contractor Access to Confidential Business Information         November 14, 1991

California State Nonroad Engine and Vehicle Pollution          November 8, 1991
Control Standards; Authorization of State Standards;
California Primary Use Determination; Opportunity for
Written Comments (Notice of an Opportunity to Submit
Written Comments)

State Implementation Plan Completeness Criteria                November 8, 1991
(Technical Correction)

NAAQS Attainment, Nonattainment, and Unclassified Area         November 6, 1991
Designations and Classifications (Notice of Final
Rulemaking)

Revise Gas Guzzler Tax Statement on Fuel Economy Label         October 28, 1991
(Direct Final Rule)

Draft Documents; Information Regarding the Formulation         October 28, 1991
and Emission Reduction Potential of Transportation
Control Measures Availability (Notice of Availability)

NESHAPs for Radionuclides; Subpart T as Applied to NRC-        October 25, 1991
licensed Uranium Mill Tailings Disposal Sites
(Notice of Proposed Rulemaking)

Approval and Promulgation of Air Quality Implementation        October 23, 1991
Plans; Massachusetts; Denial of Petition for Reconsideration;
Disapproval of Compliance Date Extension for Automobile
Surface Coating (Notice of Denial for Petition for
Reconsideration)

National Air Pollution Control Techniques Advisory             October 22, 1991
Committee (Notice of Open Meeting)

State Implementations for Nonattainment Areas for              October 22, 1991
Ozone (Notice of Finding of Failure to Submit a
Required SIP and Proposed Rule)

Volatility Regulations for Gasoline and Alcohol Blends         October 18, 1991
(Notice of Proposed Rulemaking)

Clean Air Act Advisory Committee (Notice of                    October 9, 1991
Open Meeting)

Nonroad Engine and Vehicle Emission Study                      October 9, 1991
(Notice of Public Meeting on Draft Report)

Protection of Stratospheric Ozone Phaseout of the              October 8, 1991
Production and Consumption of Class I Substances
that Deplete the Ozone Layer (Notice of
Proposed Rulemaking Correction)

Protection of Stratospheric Ozone 1991 Limits on               October 8, 1991
Production and Consumption of Ozone-Depleting Chemicals
in Section 604 (Notice of Direct Final Amendment
to the Temporary Final Rule)

Requirements for Clean Fuel Fleet Credit Programs,             October 3, 1991
Transportation Control Measures Exemptions, and for
Federal Fleets (Notice of Proposed Rulemaking)

Approval and Promulgation of Implementation Plans:             October 3, 1991
Revision of the Visibility FIP for Arizona
(Notice of Final Rulemaking)

Protection of Stratospheric Ozone Phaseout of the              Sept. 30, 1991
Production and Consumption of Class I Substances
that Deplete the Ozone Layer (Notice of Proposed
Rulemaking)

Air Programs; Credit Program for California Pilot              Sept. 25, 1991
Test Program (Notice of Proposed Rulemaking)

Control of Air Pollution from New Motor Vehicles               Sept. 24, 1991
and New Motor Vehicle Engines; Particulate Emission
Regulations for 1993 Model Year Buses, Particulate
Emission Regulations for 1994 and Later Model Year
Urban Buses, Test Procedures for Urban Buses, and
Oxides of Nitrogen Emission Regulations for 1998
and Later Model Year Heavy-Duty Engines (Notice
of Proposed Rulemaking)

Air Pollution Control; New Motor Vehicles and                  Sept. 24, 1991
Engines; On-Board Diagnostic Systems on 1994 and Later
Model Year Light-Duty Vehicles and Light Duty Trucks
(Notice of Proposed Rulemaking)

Control of Air Pollution from New Motor Vehicles and           Sept. 24, 1991
New Motor Vehicle Engines; Refueling Emission
Regulations for Gasoline-Fueled Light-Duty Vehicles
and Trucks and Heavy-Duty Vehicles (Notice of
Extension of Public Hearing)

National Emission Standards for Hazardous Air                  Sept. 19, 1991
Pollutants; Amendment to Benzene Rule for Coke
By-Product Recovery Plants (Notice of Final
Rulemaking)

Asbestos NESHAP Training Requirements for On-Site              Sept. 12, 1991
Representative (Notice of Guidance)

Hazardous Waste Treatment, Storage, and Disposal               Sept. 12, 1991
Facilities; Proposed Organic Air Emission Standards
for Tanks, Surface Impoundments, and Containers
(Extension of Public Comment Period)

National Emission Standards for Hazardous Air                  Sept. 11, 1991
Pollutants; Polonium 210 Emissions from Elemental
Phosphorus Plants (Notice of Proposed Rulemaking)

Regulation of Fuels and Fuel Additives; Standards for          Sept. 10, 1991
Reformulated Gasoline (Notice of Application for
Extension of the Reformulated Gasoline Program
to Maine)

Stratospheric Ozone Protection Advisory Committee;             Sept. 9, 1991
Renewal

Waiver of Preemption to California for Nonroad Engine          Sept. 6, 1991
and Vehicle Standards (Notice of Proposed Rulemaking)

California State Nonroad Engine and Vehicle Pollution          Sept. 6, 1991
Control Standards; Authorization of State Standards
(Proposed Decision of the Administrator; Opportunity
for Public Hearing)

Protection of Stratospheric Ozone; Servicing of                Sept. 4, 1991
Motor Vehicle Air Conditioners (Notice of Proposed
Rulemaking)

Draft 1991 Transportation-Air Quality Planning                 Sept. 4, 1991
Guidelines (Notice of Availability)

Fuels and Fuel Additives; MMT Waiver Application               Sept. 3, 1991
(Notice of Change of Hearing Date)

Control of Air Pollution from New Motor Vehicles               Sept. 3, 1991
and New Motor Vehicle Engines; Refueling Emission
Regulations for Gasoline-Fueled Light-Duty Vehicles
and Trucks and Heavy-Duty Vehicles (Notice of Public
Hearing and Report Availability)

Procedures Document for Establishing Emissions from            August 27, 1991
Sources of Hazardous Air Pollutants (Notice of Draft
Availability; Request for Public Comment)

Air Pollution Control; Motor Vehicle Emission Factors          August 26, 1991
(Notice of Availability of Revised Highway Motor
Vehicle Emission Factor Model (MOBILE4.1))

State Implementation Plan Completeness Criteria                August 26, 1991
(Notice of Final Rulemaking)

National Emission Standards for Hazardous Air Pollutants;      August 23, 1991
Polonium 210 Emissions from Phosphorus Plants
(Notice of Public Hearing)

Approval and Promulgation of Implementation Plans;             August 20, 1991
State of California, Sacramento Metropolitan
Air Quality Management District; Direct Final
Rulemaking

Requirements for Preparation, Adoption, and                    August 16, 1991
Submittal of Implementation Plans; Approval
and Promulgation of Implementation Plans;
Standards of Performance for New Stationary
Sources (Extension of Public Comment Period
for Proposed WEPCO Rulemaking)

Fuel Economy Retrofit Device Evaluation for                    August 16, 1991
the Platinum Gasaver (Notice of Fuel Economy
Retrofit Device Evaluation)

Approval and Promulgation of Implementation                    August 13, 1991
Plans; Revision of the Visibility FIP for
Arizona (Supplemental Notice Requesting
Comment)

Regulation of Fuels and Fuel Additives:                        August 13, 1991
Standards for Reformulated Gasoline (Notice
of Application for Extension of the
Reformulated Gasoline Program to Rhode
Island)

Acid Rain Advisory Committee: Subcommittee                     August 13, 1991
on NOx; Open Meeting (Notice of Open 
Meeting Dates)

Designations and Classifications for Initial                   August 8, 1991
PM-10 Nonattainment Areas (Notice Correcting
EPA's Announcement of the Designations and
Classifications for the Initial PM-10
(particulate matter nominally 10 microns or
smaller in diameter) Nonattainment Areas)

Proposed Rule Establishing Test Procedures                     August 6, 1991
for the Analysis of Pollutants; Identification
of Hazardous Waste; Test Methods (Extension
of Comment Period)

Proposed Rule to Rescind 40 CFR Part 61 Subpart I              August 5, 1991
for Nuclear Power Reactors (Radionuclide NESHAP)

Final Rule to Stay Subpart I of 40 CFR Part 61                 August 5, 1991
as it Applies to Nuclear Power Reactors
(Radionuclide NESHAP)

Volatility Regulations for Gasoline and Alcohol                August 2, 1991
Blends Sold in Calendar Year 1991: Northeastern
Arizona (Notice of Final Rulemaking)

Fuels and Fuel Additives: MMT Waiver Application               August 1, 1991

Rules of Practice Governing the Administrative                 July 22, 1991
Assessment of Civil Penalties Under the Clean
Air Act (Notice of Proposed Rulemaking)

Organic Air Emission Standards for Hazardous Waste             July 22, 1991
Treatment, Storage and Disposal Facilities (TSDF):
Tanks, Surface Impoundments, and Containers (Notice
of Proposed Rulemaking)

Regulations for Registration of Lead Substitute                July 19, 1991
Gasoline Additives to Reduce Valve Seat Wear
(Notice of Proposed Rulemaking)

National Allowance Data Base, Version 2.0: Acid                July 19, 1991
Rain Provisions (Notice of Availability)

Regulation of Fuels and Fuel Additives: Standards              July 17, 1991
for Highway Diesel Fuel Quality-Sulfur Content; and
control of Air Pollution from New Motor Vehicles and
New Motor Vehicle Engines: Standards for Oxides of
Nitrogen Emissions from Heavy-Duty Diesel Engines
(Notice of Proposed Rulemaking)

Approval and Promulgation of Air Quality Implementation        July 10, 1991
Plans; Massachusetts; Revised Regulations Requiring
Statewide Installation of Stage II Vapor Recovery Systems

Oxygenated Fuels Labeling Regulations Under                    July 9, 1991
Section 211(m) of the Clean Air Act as Amended
(Notice of Proposed Rulemaking)

Guidance on Establishment of Control Periods Under             July 9, 1991
Section 211(m) of the Clean Air Act as Amended
(Notice of Proposed Guidance)

Guidelines for Oxygenated Gasoline Credit Programs             July 9, 1991
Under Section 211(m) of the Clean Air Act as Amended
(Notice of Proposed Guidance)

Regulation of Fuels and Fuel Additives: Standards              July 9, 1991
for Reformulated Gasoline (Notice of Proposed Rule)

Protection of Stratospheric Ozone (Temporary Final             July 8, 1991
Rule; Correction)

Small Business Stationary Source Technical and                 July 8, 1991
Environmental Compliance Assistance Program (SBAP);
Notice of Staff Work Product Availability and of
Public Meeting

Guidelines Establishing Test Procedures for the                July 3, 1991
Analysis of Pollutants; Identification and Listing
of Hazardous Waste; Test Methods (Notice of Proposed
Rule and Request for Comments)

Acid Rain Advisory Committee (Notice of Open Meeting)          July 2, 1991

Motor Vehicle and Engine Compliance Program Fees for:          July 1, 1991
Light-Duty Vehicles; Light-Duty Trucks; Heavy-Duty
Vehicles and Engines; and Motorcycles (Notice of
Proposed Rulemaking)

Fuel and Fuel Additives: Proposed Guidelines for               July 1, 1991
Oxygenated Gasoline Credit Programs; Standards
for Reformulated Gas (Notice of Hearing)

Fossil Fuel-Fired Utility Steam Generating Units; Acid         June 25, 1991
Rain Provisions (Notice of Availability)

Clean Air Act Advisory Committee (Notice of Open               June 25, 1991
Meetings)

Preliminary Draft List of Categories and Subcategories         June 21, 1991
Under Section 112 of the Clean Air Act (Notice of
Availability and Request for Information)

Applicability of New Source Review and New Source              June 14, 1991
Performance Standards at Electric Utility Sources
(WEPCO) (Notice of Proposed Rulemaking)

General Preamble for Title I of the Clean Air Act              June 13, 1991
Amendments (Draft Document Available and Public Meeting)

NESHAP Compliance Extensions for Early Reduction of            June 13, 1991
Hazardous Air Pollutants (Notice of Proposed Rulemaking)

Waiver of Federal Preemption for Amendments to California's    June 11, 1991
Regulations that Establish Standards and Certification Proce-
dures for Methanol-Fueled Vehicles and Engines and Heavy-Duty
Engines Fueled by Compressed Natural Gas or Liquid Petroleum 
Gas

National Air Pollution Control Techniques Advisory             June 7, 1991
Committee Request for Suggestions for List of Candidates

Control of Air Pollution from New Motor Vehicles and New       June 5, 1991
Motor Vehicle Engines: Gaseous and Particulate Emission
Regulations for 1994 and Later Model Year Light-Duty 
Vehicles and Light-Duty Trucks; Final Rule

Clean Air Act; Enforcement Authority Guidance                  May 30, 1991

Revision of Phase I Volatility Regulations for Gasoline:       May 30, 1991
Northeastern Arizona (Notice of Proposed Rulemaking)

NSPS Municipal Solid Waste Landfills (Notice of Proposed       May 30, 1991
Rulemaking)

Regulation of Fuels and Fuel Additives; Definition of          May 30, 1991
Substantially Similar (Advanced Notice of Proposed 
Rulemaking)

Regulation of Fuels and Fuel Additives Standards for           May 29, 1991
Gasoline Volatility (Notice of Proposed Rulemaking)

Urban Bus Particulate Matter Standard for Model Years 1991     May 29, 1991
to 1992 (Notice of Proposed Rulemaking)

State Implementation Plan Completeness Criteria                May 24, 1991
(Notice of Proposed Rulemaking)

Auctions, Direct Sales and Independent Power Producers         May 23, 1991
Written Guarantee Regulations (Notice of Proposed 
Rulemaking)

NESHAP Radon Emissions from Phosphogypsum Stacks               May 22, 1991
(Notice of Compliance Waiver)

Stratospheric Ozone Advisory Committee (Announcement           May 15, 1991
of Advisory Committee Meeting)

Proposed Rule on Operating Permits Under Clean                 May 10, 1991
Air Act: Operating Permit Program (Notice of
Proposed Rule; Notice of Opportunity for Public
Hearing)

Volatility Regulations for Gasoline and Alcohol Blends         May 6, 1991
Sold in Calendar Year 1991: State of Texas (Notice of
Proposed Rulemaking)

Stay of Subpart I of CFR Part 61 Radionuclide Emissions        April 24, 1991
(Final Rule)

Preparation, Adoption, and Submittal of SIPS: PM-10,           April 22, 1991
Sulfur Dioxide, and Lead Nonattainment and 
Unclassifiable Area Designations (Information Notice)

Acid Rain Advisory Committee (Notice of Open Meeting)          April 15, 1991

Control of Air Pollution Motor Vehicle Engines: Federal        April 15, 1991
Certification Test Results for 1991 Model Year

Request for Information Concerning Heavy-Duty Engine           April 4, 1991
Rebuild (Notice, Request for Information)

Regulation of Fuels and Fuel Additives (Direct Final Rule)     April 4, 1991

Inspection Maintenance Policy (Notice of Public Workshop)      April 3, 1991

Fuel Economy Test Procedures: Alternative-Fueled Automobile    April 1, 1991
CAFE Incentives and Fuel Economy Labeling Requirements
(Extension of Comment Period for the Notice of Proposed
Rulemaking)

National Emission Standards for Hazardous Air Pollutants;      April 1, 1991
Amendment to Benzene Rule for Coke By-Product Recovery
Plants (Notice of Proposed Rulemaking)

Requirements for Preparation, Adoption and Submittal of        March 18, 1991
Implementation Plans; Approval and Promulgation of
Implementation Plans (Notice of Proposed Rulemaking)

Air Quality: Revision to EPA Policy Concerning Ozone           March 18, 1991
Control Strategies and Volatile Organic Compound Reactivity
(Notice of Revised EPA Policy Statement)

Notice Announcing Designation and Classifications for          March 15, 1991
Initial PM-10 Nonattainment Areas

National Emission Standards for Hazardous Air Pollutants--     March 13, 1991
NRC-Licensed Facilities (Advance Notice of Proposed
Rulemaking)

National Emission Standards for Hazardous Air Pollutants--     March 13, 1991
NRC-Licensed Facilities (Notice of Proposed Rulemaking)

National Emission Standards for Hazardous Air Pollutants--     March 13, 1991
NRC-Licensed Facilities (Order Temporarily Staying Effective
Date)

Notice of Availability of Guidance and Submittal Forms for     March 12, 1991
Elections under Sections 405(d)(3), 405(d)(4), and 405(g)(2)
of the Clean Air Act Amendments of 1990

Control of Air Pollution from New Motor Vehicles and New       March 7, 1991
Motor Vehicle Engines; Gaseous and Particulate Emission
Regulations for 1994 and Later Model Year Light-Duty 
Vehicles and Light-Duty Trucks (Notice of Proposed 
Rulemaking)

Regulations to Implement the 1991 Limits on the Production     March 6, 1991
and Consumption of Ozone-Depleting Chemicals Required by 
Section 604 of the Clean Air Act Amendments of 1990 
(Temporary Final Rule)

Acid Rain Advisory Committee (Notice of Open Meeting)          March 6, 1991

New Source Performance Standards: Standards of Performance     March 5, 1991
for Polypropylene, Polyethylene, Polystyrene, and Poly
(ethylene Terephthalate) Manufacturing Industry (Final 
Rule; Correction)

National Emission Standards for Hazardous Air Pollutants--     March 4, 1991
Announcement of Negotiated Regulation for Equipment Leaks
(Notice of Agreement on Negotiated Regulation)

Fuel Economy Test Procedures: Alternative-Fueled Economy       March 1, 1991
Labeling Requirements (Notice of Proposed Rulemaking)

Nonroad Engines and Vehicles (Notice of Public Workshop)       February 25, 1991

Notice of Fifth Conference on Air Quality Modeling             February 25, 1991

Disclosure of Emission Data Claimed as Confidential Under      February 21, 1991
Section 110 and 114(c) of the Clean Air Act (Notice of 
Policy on Public Release of Certain Emission Data Submitted 
Under Sections 110 and 114(c) of the Clean Air Act)

National Emission Standards for Hazardous Air Pollutants--     February 15, 1991
NRC-Licensed Facilities (Notice of Proposed Rule)

Requirements for Preparation, Adoption, and Submittal of       February 13, 1991
Implementation Plans--Augmentation of Guidelines on Air
Quality Models (Notice of Proposed Rulemaking)

Standards of Performance for New Stationary Sources--          February 11, 1991
Addition of Performance Specification 4A to Appendix B and 
Revision of Procedure 1 of Appendix F (Final Rule)

Emission Guidelines: Municipal Waste Combustors (Final         February 11, 1991
Emission Guidelines)

Standards of Performance for New Stationary Sources:	       February 11, 1991
Municipal Waste Combustors (Final Rule)

Approval and Promulgation of Implementation Plans:             February 8, 1991
Revision of the Visibility FIP for Arizona (Notice of 
Proposed Rulemaking and Announcement of Public Hearing)

Standards of Performance for New Stationary Sources--          February 4, 1991
Amendments to Subpart J (Petroleum Refineries) and
Addition of Performance Specification 7 to Appendix B
(Final Rule; Correction)

Performance Warranty Regulations and the Voluntary             January 30, 1991
Aftermarket Part Certification Program: Supplemental 
Proposed Alternative Test Procedure (Supplemental Notice of
Proposed Rulemaking)

Approval and Promulgation of Implementation Plans:	       January 25, 1991
Deletion of Statutory Restriction on New Sources Under 
Certain Circumstances in Nonattainment Areas; California--
Kern and Fresno Counties

Control of Air Pollution from New Motor Vehicles and New       January 23, 1991
Motor Vehicle Engines: Evaporative Emissions Regulations for
Gasoline and Methanol-Fueled Light-Duty Vehicles
(Extension of Comment Period)

National Air Pollution Control Techniques Advisory Committee   January 11, 1991
(Notice of Open Meeting)

Acid Rain Advisory Committee (Notice of Open Meeting)          January 11, 1991

Notice Listing Ozone-Depleting Substances (Initial Lists)      January 1, 1991

Fuels and Fuel Additives: Waiver Application (Notice)          December 20, 1990

Amendments to Standards of Performance for New Stationary      December 13, 1990
Sources: Reporting Requirements (Final Rule)

Standards of Performance for New Stationary Sources:           December 11, 1990
Polypropylene, Polyethylene, Polystyrene, and Poly(ethyl
Terephthalate) Manufacturing Industry (Final Rule)

Acid Rain Advisory Committee (Notice of Open Meeting)          November 26, 1990

Stratospheric Ozone Protection: EPA Information Request        November 26, 1990