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Tuesday

August 21, 1979

- -

Part V

Environmental

Protection Agency

Priority List and Additions

to the List of Categories of Stationary

Sources

HeinOnline -- 44 Fed. Reg. 49221 1979
Federal Register / Vol. 44, No. 163 / Tuesday, August 21, 1979 / Rules and Regulations

ENVIRONMENTAL PROTECTION

AGENCY

40 CFR Part 60

[FRL 1276-3]

Priority List and Additions to the List

of Categories of Stationary Sources

AGENCY: Environmental Protection

Agency.

ACTION: Final rule.

SUMMARY: This action contains EPA's

promulgated list of major source

categories for which standards of

performance for new stationary sources are to be promulgated by August 1982.

The Clean Air Act Amendments of 1977

specify that the Administrator publish a

list of the categories of major stationary

sources which have not been previously

listed as source categories for which

standards of performance will be

established. The promulgated list

implements the Clean Air Act and

reflects the Administrator's * determination that, based on

preliminary assessments, emissions

from the listed source categories contribute significantly to air pollution. The intended effect of this promulgation

is to identify major source categories for

which standards of performance are to

be promulgated. The standards would

apply only to new or modified

stationary sources-of air pollution.

EFFECTIVE DATE: August 21, 1979.

ADDRESSES: The background document

for the promulgated priority list may be

obtained from the U.S. EPA Library (MD-35), Research Triangle Park, North

Carolina 27711, telephone number 919-

541-2777. Please refer to "Revised

Prioritized List of Source Categories for

New Source Performance Standards,"

EPA-450/3-79-023. The prioritization methodology is explained in the

background document for the proposed

priority list. This document, "Priorities

for New Source Performance Standards

under the Clean Air Act Amendments of

1977," EPA-450/3-78- 019, can also be

obtained from the Research Triangle

Park EPA Library. Copies of all

comment letters received from

interested persons participating in this

rulemaking, a supmary of these

comments, and a summary of the

September 29, 1978, public hearing are

available for inspection and copying during normal business hours at EPA's

Public Information Reference Unit,

Room 2922 (EPA Library), 401 M Street,

SW,, Washington, DC.

FOR FURTHER INFORMATION CONTACT.

Gary D. McCutchen, Emission Standards

and Engineering Division (MD-131,

Environmental Protection Agency,

Research Triangle Park, N.C. 27711,

-telephone number (919) 541-5421.

SUPPLEMENTARY INFORMATION: On

August 31, 1978 (43 FR 38872), EPA

proposed a priority list of major source

catagories for which standards of

performance would be promulgated by

August 1982, and invited public

comment on the list and the

methodology used to prioritize the

source categories. Promulgation of this

list is required by section 111(f) of the

Clean Air Act as amended August 7,

1977. The significant comments that

were received during the public

comment period, including those made

at a September 29,1978, public hearing,

have been carefully reviewed and

considered and, where determined by, ,the Administrator to be appropriate,

changes have been included in this

notice of final rulemaking.

Background

The program to establish standards of

performance for new stationary sources

(also called New Source Performance

Standards or NSPS) began on December

1970, when the Clean Air Act was

signed into law. Authorized under

section 111 of the Act, NSPS were to

require the best control system

(considering cost) for new facilities, and

were intended to complement the other

air quality management approaches

authorized by the 1970 Act. A total Of 27

source categories are regulated by

NSPS, with NSPS for an additional 25

source categories under development.

During the 1977 hearings on the Clean

Air Act, Congress received testimony on

the need for more rapid development of

NSPS. There was concern that not all

sources which had the potential to

endanger public health or welfare were

controlled by NSPS and that the

potential existed for "environmental

blackmail" from source categories not

subject to NSPS. These concerns Were

reflected in the Clean Air Act

Amendments of 1977, specifically in

section 111(f).

. Section 111(f) requires that the

Administrator publish a list of major stationary sources of air pollution not

listed, as of August 7, 1977, under

section 111(b)(1)(A), which in effect

meant those sources for which NSPS

had not yet been proposed or

promulgated. Before promulgating this

list, the Administrator was to provide notice of and opportunity for a public hearing and consult with Governors and

State air pollution control agencies. In

developing priorities, section 111(f)

specifies that the Administrator

consider (1) the quantity of emissions

from each source category, (2) the extent

to which each pollutant endangers

public health or welfare, and (3) the

mobility and competitive nature of each

stationary source category, e.g., the

capability of a new or existing source to

locate in areas with less stringent air

pollution control regulations. Governors

may at any time submit applications

under section 111(j) to add major source

categories to the list, add any source

category to the list which may endanger

public health or welfare, change the

priority ranking, or revise promulgated

NSPS.

Development of the Priority List

Development of the priority list was

initiated by compiling data on a large

number of source categories from

literature resources. The data were first

analyzed to determine major source

categories, those categories for which an

average size plant has the potential to

emit 100 tons or more per year of any

one pollutant. These major source

categories were then subjected to a

priority ranking procedure using the

three criteria specified in section 111(o

of the Act.

The procedure used first ranks source

categories on a pollutant by pollutant

basis. This resulted in nine lists (one for

each pollutant-volatile organic

compounds (VOC), nitrogen oxides,

particulate matter, sulfur dioxide,

carbon monoxide, lead, fluorides, acid

mist, and hydrogen sulfide) with each

list ranked using the criteria in the Act,

In this ranking, first priority was given

to quantity of emissions, second priority

to potential impact on health or welfare,

and third priority to mobility. Thus,

sources with the greatest growth rates

and emission reduction potential were

high on each list; sources with limited

choice of location, low growth and small

emission reduction potential were low

on each list.

The nine lists were combined Into one.

by selecting pollutant goals-a

procedure which, in effect, assigned a

relative priority to pollutants based

upon the potential impact of NSPS. After

thepollutant goals were selected, the

final priority list was established

through the selection of source

categories which have maximum impact

on attafining the selected goals. The

effect of this procedure was to

emphasize control of all criteria

pollutants except carbon monoxide and

to give carbon monoxide and noncriteria pollutants a lower priority.

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In the background reports and in the

preamble to the proposed priority list,

the term "hydrocarbon" was used even

though the emissions referred to were

VOC which, unlike hydrocarbon

compounds, can contain elements other

than carbon and hydrogen. A VOC is

defined by EPA as any organic

compound that, when released to the

atmosphere, can remain long enough to

participate in photochemical reactions.

Since VOC contribute to ambient levels

of photochemical oxidants, they are

considered a criteria pollutant.

The ranking of source categories on

the list and the differentiation between

major and minor sources was sensitive

to the accuracy of the data utilized. The

data base used to establish the-priority

list was obtained from a number of

literature sources including EPA

screening studies. However, screening

studies were not available for all source

categories. Therefore, if new information

becomes available after promulgation of

the list, the Administrator may delete

from or add to the list in response to this

new information.

Additional detail on the prioritization

methodology, the input factors used, and

the ranking of individual source

categories is available in the two

background documents (see

"ADDRESSES").

Significance of Priority List

The promulgated list is essentially an

advance notice of future standard

development activity. It identifies major

source categories and the approximate

order in which NSPS development

would be initiated. However, if further

study indicates that an NSPS would

have little or no effect on emissions, or

that an NSPS would be impractical, a

source category would be given a lower

priority or removed from-the list.

Similarly, new information may increase

the priority of a source category. The

Administrator may also concurrently

develop standards for sources which are

not on the priority list, especially certain

"minor" sources which, in aggregate,

represent a large quantity of emissions.

The distinction between major and

minor source categories is defined only

for the purpose of determining NSPS

priorities and should not be used to,

determine sources subject to New

Source Review, which is conducted on a

case-by-case basis. Moreover, some

New Source Review programs, such as

prevention of significant deterioration,

have separate and distinct criteria for

defining a major source (e.g., 100 tons

per year potential for certain source

types and 250 tons per year for others).

Identification of Source Categories

Two groups of sources in addition to

minor sources are not included on the

promulgated list. One group includes

sources which could not be evaluated

due to insufficient information. This lack

of data suggests that these sources,

which are identified in the background

report, "Priorities for NSPS under the

Clean Air Act of 1977," have not

previously been regulated or studied

and, therefore, are probably not major

sources. Nevertheless, the Administrator

will continue to investigate these

sources and will consider development

of NSPS for any which are identified as

being significant sources of air pollution.

The second group of source categories

not on the priority list consists of those

listed under section 111(b](1)(A) on or

before August 7,1977. These are:

Fossil-fuel-fired steam generators Incinerators

Portland Cement Plants

-Nitric Acid Plants

Sulfuric Acid Plants

Asphalt Concrete Plants

Petroleum Refineries

Storage Vessels for Petroleum Liquids Secondary Lead Smelters

Secondary Brass and Bronze Ingot Production

Plants

Iron and Steel Plants

Sewage Treatment Plants

Primary Copper Smelters

Primary Zinc Smelters

Primary Lead Smelters

Primary Aluminum Reduction Plants

Phosphate Fertilizer Industry- Wet Process

Phosphoric Acid Plants

Phosphate Fertilizer Industry. Superphosphoric Acid Plants

Phosphate Fertilizer Industry: Diammonlum

Phosphate Plants

Phosphate Fertilizer Industry: Triple Superphosphate Plants

Phosphate Fertilizer Industry: Cranular Triple Superphosphate Storage Facilities

Coal Preparation Plants

Ferroalloy Production Facilities

Steel Plants: Electric Arc Furnaces

Kraft Pulp M4ills - Lime Plants

Grain Elevators

There are, however, some facilities (or

subcategories) within these source

categories for which NSPS have not

been developed, but which may by themselves be significant sources of air

pollution. A number of these facilities

were evaluated as if they were separate

source-categories; three which rank high in priority are included on the

promulgated list to indicate that the

Administrator plans to develop

standards for them: Petroleum refinery

fugitivi emissions, industrial fossil-fuelfired steam generators, and nonmunicipal incinerators. In addition to

these, the Administrator will continue to

evaluate affected facilities within listed

source categories and may from time to

time develop NSPS for such facilities.

The iron and steel industry provides an

example of a category which is already

listed (so does not appear on the priority

list), but in which an active interest

remains. Although the growth rate for

new sintering capacity is presently very

low, the Administrator is continuing to

assess emission control and

measurement technology with a view

toward possible development of an

NSPS for sintering plants at a later date.

A project is also underway to update

emission factors for all steelmaking

processes, including fugitive emissions,

in an effort to determine the relative

significance of emissions from each

process. In addition, byproduct coke

ovens, nearly always associated with

steel mills, are included on the priority

list and are undergoing standard

development studies.

There are some differences between

the format of the list in the background

report, "Revised Prioritized List of

Source Categories for NSPS

Promulgation" 9nd the format of the list

which appears here. These differences

are primarily a result of aggregation of

subcategories which had been

subdivided for size classification and

priority ranking analysis. Non-metallic

mineral processing, for example, had

been subdivided into nine subcategories for prioritization, eight of which were

analyzed separately (stone, sand and

gravel, clay, gypsum lime, borax,

fluorspar, and phosphate rock mining)

and one of which is considered a minor

source (mica mining). EPA plans to

study the entire non-metallic mineral

processing industry at one time, since

many of the processes and control

techniques are similar. For this reason,

the industry is identified by a single

aggregated listing. This does not

necessarily imply that a single standard

would apply to all sources within the

listed category. Rather, as described

below in the case of the synthetic

organic chemical manufacturing

industry, the nature and scope of

standards will be determined only after

a detailed study of sources within the

category.

In addition to the major sources, three

source categories not identified as being major source categories have been

added to the list: organic solvent

cleaning, industrial surface coating of

metal furniture, and lead acid battery

manufacture.

Organic solvent cleaning was chosen

for study because this source category

accounts for some 5 percent of

stationary source VOC emissions in a

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typical air quality control region. Thus,.

although individual facilities typically emit less than 100 tons per year, this is a

significant source of VOC emissions and

the Administrator considers it prudent

to continue the development of a

standard for this source category.

The metal furniture coating industry is

also a significant source of VOC

emissions, and there are over 300

existing facilities with the potential to

emit more than 100 tbns per year.

Lead acid battery manufacture is a

significant source of lead emissions. An

NSPS for this source category is

expected to assist in attainment of the

National Ambient Air Quality Standard

for lead.

Stationary gas turbines are included

on this list because this source category had not been listed by August 7,1977, when the Clean Air Act Amendments

were enacted. However, this source

category has not been prioritized, since

it was listed under section 111(b)(1)(A)

and NSPS were proposed October 3,

1977.

One listed source category which

deserves special attention is the

synthetic organic chemical

manufacturing industry (SOCM1).

Preliminary estimates indicate that there

may be over 600 different processes included in this source category, but

only 27 of these processes have been

evaluated. For the others, there-was not

enough information available. As is the

case with several other aggregated

source categories, generic standards will

be used to cover as many of the sources

as possible, so separate NSPS for each

of the 600 processes are unlikely.

Based on an effort which has been

underway within EPA for two years to

study this complex source category, the . generic standards could regulate -nearly all emissions by covering four broad

areas: Process facilities, storage facilities, leakage, and transport and

handling losses. Also, since a number of

the pollutants emitted are potentially toxic or carcinogenic, regulation under,

section 112, National Emission

Standards for Hazardous Air Pollutants

(NESHAP), rather than NSPS may be

more appropriated. Therefore; SOCMI is

listed as a single source category. The 27

processes considered the most likely candidates for NSPS or NESHAP

coverage through generic standards are

listed in the preamble to the proposed

priority list and discusspd in the

background documents.

Additional information has resulted-in

the exclusion from the list of some

source categories which are shown in

the background reports. Mixed fuel

boilers and feed and grain milling are

regulated by the NSPS for fossil-fuel

steam generators and grain elevators,

respectively. Beer manufacture has a

much lower emission level than had

been assumed in the background report,

and whiskey manufacture was deleted

due to a lack of any demonstrated

control technology.

Public Participation

-The Clean Air Act requires that the

Administrator, prior to promulgating this

list of source categories, consult with

Governors and State air pollution

control agencies. An invitation was

extended on February 28,1978, to the

State and Territorial Air Pollution

Program Administrators (STAPPA) and

the National Governors' Association.

(NGA) to attend the first Working Group meeting, March 16, 1978, and review the

draft background report and the

methods used to apply the priority

criteria. On March 24,1978, each

Governor and the director of each State

air pollution control agency was notified

by letter of this project, including an

invitation to participate or comment:

(1] At the April 5-6,1978, National Air

Pollution Control Techniques Advisory Committee (NAPCTAC) meeting in

Alexandria, Virinia;

(2) When the final background report

was mailed to them;

(3) When the list was proposed in the

Federal Register, or

(4) At a public hearing to be held on

the proposed list. The draft background

report for the proposed list was mailed

to all NAPCTAC members, five of which

represent State or-local agencies, two of

which represent environmental groups, and eight of which represent industry. Copies were mailed to six

environmental groups and three

consumer groups at the same time, and

to a representative of the NGA. Copies of the final background report for the

proposed list were sent to the

Governors, State and local air pollution control agencies, NAPCTAC members,

environmental groups, the NGA, and

other requesters in July 1978.

The public comment period on the

proposed list, published in the-August 31, 1978, Federal Register, extended

through October 30, 1978. There were 18

comment letters received, 10 from

industry and 8 from various regulatory agencies. Several comments resulted in

changes to the proposed priority list.

-A public hearing was held on

September 29; 1978, to discuss the

proposed priority listin accordance with

section 111(g)(8) of the Clean Air Act.

There were no written comments and

only one verbal statement resulting from

the public hearing.

Significant Comments and Changes to

the Proposed Priority List

As a result of public comments and

the availability of new screening studies

and reports, 34 major and 11 minor

source category data sets were

reevaluated. This reexamination

resulted in data changes for 29 major and 9 minor source categories.

Ten source categories have been

removed from the proposed priority list.

Eight of these source category deletions

are a result of new data indicating that

NSPS would have little orno effect.

These source categories are: Varnish,

carbon black, explosives, acid sulfite

wood pulping, NSSC wood pulping, gasoline additives manufacturing, alfalfa

dehydrating, and hydrofluoric acid

manufacturing. Printing ink

manufacturing was reclassified from a

major to a minor source category. In

addition, two source categories, gray iron and steel foundries, were combined - into one source category. Finally, fuel

conversion was removed from the list

due to uncertainties regarding the

approach and scheduled involved in

developing environmental standards for

the various processes. Likely candidates

for NSPS include coal gasification (both low and high pressure), coal

liquefaction, and oil shale and tar sand

processing. These actions reduce the

final priority list to 59 source cuategorles.

The most significant comments and

changes made to the proposed regulations are discussed below:

1. Definition of "Mobility." Several

commenters felt that the treatment of

source category mobility (movability)

was too broad. Mobility In the

prioritization analysis refers to the

feasibility a stationary source has to

relocate to, or locate new facilities In,

areas with less stringent air pollution control regulations. Non-movable

stationary source categories were

identified on the basis of being firmly tied either to the market (e.g., dry cleaners) or to a supply of materials

(e.g., mining operations). The

Administrator recognizes that there are

many other factors which would be

considered in plant siting situations, but

considers the approach used In

determining the priority list sufficient foir

the purposes of this study.

2. Source Category Aggregation, Several commenters indicated that there

were discrepancies between the source

categories named in the priority list and

those in the background document. The

differences between the priority listing in the Federal Register and the

background document list is a result of

aggregation of sources which had been

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subcategorized for size classification

and priority ranking analysis in the

background document. Aggregation

indicates that all source categories

under a generic industry heading, such

as non-metallic mineral processing, will

be evaluated at the same time, although

this does not necessarily imply that a

single standard would apply to all

sources within the listed category.

3. Control Costs. Two commenters felt

that the cost of pollution control to meet

NSPS limitations should have been

included in the criteria for prioritization.

The Clean Air Act priority list criteria

do not include the cost of pollution

control, but pollution control costs were

considered during the determination of

control technology assumed for the

priority list study. Control costs are

examined in more detail during NSPS

development studies for each source

category, and must be considered in

determining each NSPS.

4. Minor Source Categories. One

commenter felt that the Administrator

lacks statutory authority to make a

policy decision to develop NSPS for a

minor source category until after the

major sources have been dealt with,

since Congress indicated major sources

must be given priority. The

Administrator, in promulgating this list,

is placing an almost exclusive emphasis

on NSPS for major source categories.

However, the Clean Air Act does not

prohibit concurrent promulgation of

NSPS for minor, but significant, source

categories. For the three minor source

categories listed in this regulation, NSPS

development had been initiated before

the priority list was available, and

completion of standards development

for these sources is considered justified.

5. Stationary Fuel Combustion/Waste

Incineration. Two State agencies felt

that stationary fuel combustion and

waste incineration should have a high

priority because of source activity

growth in their respective States. In the

promulgated list, both of these source

categories are given higrpriority based

on the most recent growth rates

available. Given the concern expressed

by these agencies, the Administrator has

already initiated standard development

studies for these source categories.

6. Chemical Products Manufacture!

Fuel Conversion. One commenter felt

that the growth rate and, therefore, the

need for coal gasification plant NSPS is

overestimated. High Btu coal

gasification was reexamined; although

no commercial-scale plants currently

exist in this country, environmental

programs need to keep pace with the

emphasis on energy programs. The fuel

conversion processes have been

removed from the priority list for special

study.

7. Chemical Products Manufacture/

Printing Ink Manufacture. One

commenter indicated that neither

existing conditions within the printing

ink industry nor projections of future

growth of the industry justify its

categorization as a major source. The

Administrator has examined the new

data provided, and has reclassified

printing ink manufacturing plants as a

minor source category. As was

discussed earlier, however, the

Administrator may still develop

standards for "minor" source categories,

especially those which, in aggregate,

represent a significant quantity of

emissions.

8. Wood Processing/NSSC ndAcid

Sulfite Pulping. One commenter

indicated that acid sulfite pulp

production is a declining growth

industry and therefore should not be

included in the priority list. The

Administrator agrees with this

comment, based on examination of acid

sulfite pulp production projections in a

new screening study. In addition, the

screening study indicates that NSSC

pulping is, in effect, controlled by the

promulgated NSPS for Kraft pulp mills,

resulting in little or no further emission

reduction from promulgation of an NSSC

NSPS. Therefore, both acid sulfite and

NSSC pulping have been removed from

the list.

Development of Standards

The Administrator has .undertaken a

program to promulgate NSPS for the

source categories on this priority list by

August 7,1982. Development of

standards has already been initiated for

nearly two-thirds of the source

categories listed; work on the remaining

source categories will be initiated within

the next year.

The priority ranking is indicated by

the number to the left of each source

category and will be used to decide the

,order in which new projects are

initiated, although this is not necessarily

an indication of the order in which

projects will be completed. In fact,

higher priority source categories often

present difficult technical and regulatory

problems, and may be among the later

source categories for which standards

are promulgated.

It should be pointed out that several

of the source categories listed could be

subject to standards which may be

adopted under section 112 of the Clean

Air Act, national emission standards for

hazardous air pollutants (NESHAP).

Included are byproduct coke ovens and

several source categories within the

petroleum transport and marketing

industry. If standards are developed

under section 112 for these or any other

source categories on the promulgated

list, then standards may not be

developed for those source categories

under section 111.

Promulgation of this list not only

fulfills the section 111(f) requirements

concerning establishment of priorities,

but also constitutes notice that all

source categories on the priority list are

considered significant sources of air

pollution and are hereby listed in

accordance with section 111(b)(1)(A). It

should be noted, however, that the

source categories identified on this

priority list, even though listed in

accordance with section 111(b)(1)(A),

are not subject to the provisions ofsection 111(b](1)(B], which would

require proposal of an NSPS for each

listed source category within 120 days of

adoption of the list. Rather, the

promulgation of standards for sources

contained on this priority list will be

undertaken in accordance with the time

schedule prescribed in section 111(f)(1)

of the Clean Air Act Amendments. That

Is, NSPS for 25 percent of these source

categories are to be promulgated by

August 1980, 75 percent by August 1981,

and all of the NSPS by August 1982.

Dated: August 15, 1979.

Douglas M. Costle,

Administrotor.

Part 60 of Chapter I of Title 40 of the

Code of Federal Regulations is amended

by adding § 60.16 to Subpart A as

follows:

§ 60.16 Priority list

Prioritized Major Source Categories

rority Number"

Source Cotegory

1. Synthetic Organic Chemical Manufacturing (a) Unit processes

(b) Storage and handling equipment (c) Fugitive emission sources

(d) Secondary sources

2. Industrial Surface Coating: Cans

3. Petroleum Refineries: Fugitive Sources

4. Industrial Surface Coating- Paper 5. Dry Cleaning (a] Perchloroethylene (b) Petroleum solvent

& Graphic Arts

7. Polymers and Resins: Acrylic Resins

8. Mineral Wool

9. Stationary Internal Combustion Engines 10. Industrial Surface Coating: Fabric

11. Fossil-Fuel-Fired Steam Generators:

Industrial Boilers

12. Incineration Non-Municipal 13. Non-Metallic Mineral Processing - 14. Metallic Mineral Processing

"Low n-mbers have highest priority; e.g.. No.i s high priority. No. 59 Is low priority.

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15. Secondary Copper

16. Phosphate Rock Preparation

17. Foundries. Steel and Gray Iron

18. Polymers and Resins: Polyethylene

19. Charcoal Production

20. Synthetic Rubber

(a) Tire manufacture

(b) SBR production

21. Vegetable Oil

22. Industrial Surface Coating: Metal Coil

23. Petroleum Transportation and Marketing

24. By-Product Coke Ovens

25. Synthetic Fibers

26. Plywood Manufacture

27. Industrial Surface Coating: Automobiles

28. Industrial Surface Coating: Large

Appliances

29. Crude Oil and Natural Gas Production

30. Secondary Aluminum

31. Potash

32. Sintering: Clay and Fly Ash

33. Glass

34. Gypsum

35. Sodium Carbonate

36. Secondary Zinc

37. Polymers and Resins: Phenolic

38. Polymers and Resins: Urea-Melamfne

39. Ammonia

40. Polymers and Resins: Polystyrene

41. Polymers and Resins: ABS-SAN Resins

42. Fiberglass

43. Polymers and Resins: Polypropylene

44. Textile Processing

45. Asphalt Roofing Plants

46. Brick and Related Clay Products

47. Ceramic Clay Manufacturing

48. Ammonium Nitrate Fertilizer

49. Castable Refractories

50. Borax and Boric Acid

51. Polymers and Resins: Polyester Resins

52. Ammonium Sulfate

53. Starch

54. Perlite

55. Phosphoric Acid: Thermal Process

56. Uranium Refining

57. Animal Feed Defluorination

58. Urea (for fertilizer and polymers)

59. Detergent

Other Source Categories

Lead acid battery manufacture*-

Organic solvent cleaning*

Industrial surface coating: metal firniture**

Stationary gas turbines* *

(Sec. 111, 301(a). Clean Air Act as amended

(42 U.S.C. 7411, 7601))

[FR Doc. 79-25656 Filed 8-20-79: 6:45 aml

BILLING CODE 6560-01-M

"* Minor source category, but included on list

since an NSPS is being developed for that source

category.

*** Not prioritized, since an NSPS for this major

source category has already been proposed.

44, No. 163 / Tuesday, August 21, 1979 / Rules and Regulations

HeinOnline -- 44 Fed. Reg. 49226 1979