Appendix — West Virginia ex rel. Air Pollution Control Commission v. Gorsuch

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APPENDIX A

ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 52

[FRL 1352-7]

Proposed Revision of the West Virginia State Im-

plementation Plan

- AGENCY: Environmental Protection Agency.

ACTION: Proposed rule.

SUMMARY: On November 9 1978, the Administra-

tor approved as a revision of the West Virginia

State Implementation Plan (SIP), amendments to

the Commonwealth’s Regulation X dealing with sul-

fur dioxide (SO.) emissions from electric power gen-

erating plants. In response to petitions for review

to the Third Circuit Court of Appeals, EPA has re-

considered the air quality impact of the revised emis-

sion limits for two power stations affected by the

amendments. On the basis of its reconsideration,

EPA now proposes to approve the revision.

DATE: Comments must be submitted on or before

December 7, 1979.

ADDRESSES: Copies of the documentation in sup-

port of the proposed rule are available for public

inspection during normal business hours at the fol-

lowing offices:

U.S. Environmental Protection Agency, Region

III, Air Programs Branch, Curtis Building,

Sixth and Walnut Streets, Philadelphia, PA

19106. Attn: Mr. William Belanger.

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Public Information Reference Unit, Room 2922,

EPA Library, U.S. Environmental Protection

Agency, 401 M Street SW., Washington, D.C.

20460.

All comments on the proposed revision submitted

by December 7, 1979, will be considered and should

be directed to:

Mr. Howard R. Heim, Chief, Air Programs

Branch (3AH10), Air, Toxics & Hazardous

Materials Division, U.S. Environmental Pro-

tection Agency, Region III, Sixth and Walnut

Streets, Philadelphia, PA 19106. Attn: AH

OOTWV.

FOR FURTHER INFORMATION CONTACT: Mr.

William Belanger (3AH13), Air Programs Branch,

U.S. Environmental Protection Agency, Region III,

Curtis Building, 10th Floor, 6th and Walnut Streets,

Philadelphia, PA 19106; phone (215) 597-8188.

SUPPLEMENTARY INFORMATION: On Novem-

ber 9, 1978, (48 FR 52239) the Administrator ap-

proved as a revision to the West Virginia SIP, amend-

ments to the Commonwealth Regulation X, which

deals with sulfur dioxide emissions from electric

power plants. Among other actions, the revisions

would allow increases in emissions from the Harrison

and Mitchell generating stations. The approval was

based on the determination by EPA that the relaxa-

tion of emission limitations would not interfere with

attainment or maintenance of the National Ambient

Air Quality Standard for sulfur dioxide. This de-

termination was based on air pollution modeling con-

ducted by EPA. This modeling incorporated an anal-

ysis of the Harrison plant based on a “Good En-

gineering Practice” stack height as mandated by Sec-

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tion 123 of the Clean Air Act, but the approval of

the limitation for the Harrison plant was for a period

of one year, or until EPA promulgated final regula-

tions implementing Section 123, whichever came

first.

On January 3, 1979 and January 5, 1979, the Com-

monwealth of Pennsylvania and the Council of Senior

West Virginians, et al., filed in the U.S. Court of

Appeals for the Third Circuit petitions for review of

EPA’s final rulemaking action of November 9, 1978.

On July 9, 1979, EPA requested the Court remand

to the agency two issues raised by the petitioners.

EPA sought to reconsider the air quality impact of

the revised emission limitation for the Harrison and

Mitchell stations in light of all meteorological data

available, and to consider the impact of Harrison on

the Prevention of Significant Deterioration (PSD)

increments. The Court granted EPA’s motion on July

10, 1979 and stayed further action pending EPA’s

reassessment of its earlier action. EPA agreed to

propose a rule governing these power stations by

October 8, 1979. Due to difficulties in completing its

analysis, EPA requested and received from the court

an extension to November 7, 1979. In addition, West

Virginia asked EPA to propose a permanent emis-

sion limit for the Harrison station as final regula-

tions under Section 123 have not been issued.

EPA has conducted new modeling for the Harri-

son and Mitchell plants. The modeling was conducted

utilizing the CRSTER Model for areas within 50

kilometers of the plants and two independent ap-

proaches for the Class 1 PSD areas which are more

distant. A formal statistical analysis was performed

to account for fuel variability as a means of realis-

tically evaluating the impact of the plant in light of

the uniquely extensive record of meteorological con-

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ditions during nine years. The results of the modeling

shows no expected violations of any of the SO. air

quality standards during the useful life of the plants.

The modeling also shows that the Harrison plant will

consume less than the available PSD increment. Mod-

eling was also performed for receptors within the

Commonwealth of Pennsylvania and it was found

that emissions from the plants will not prevent at-

tainment of the SO, standards in Pennsylvania. All

modeling for the Harrison station assumed good en-

gineering practice stack height, and EPA proposes

to make the proposed Regulation X amendments

permanent.

This notice is to announce the results of the new

modeling, and to provide a 30-day comment period

before it is decided whether to approve the earlier

revisions to Regulation X (previously approved No-

vember 9, 1978) concerning the Mitchell and Harri-

son power stations as a revision to the West Vir-

ginia State Implementation Plan. Therefore, the pub-

lic is invited to submit to the address stated above,

comments on whether to approve this proposed rule

as a revision of the West Virginia State Implementa-

tion Plan.

The Administrator’s decision to approve or dis-

approve the proposed revision will be based on

whether the amendments meet the requirements of

section 110 (a) (2) of the Clean Air Act and 40 CFR

Part 51, Requirements for Preparation, Adoption,

and Submittal of Implementation Pians.

Under Executive Order 12044, EPA is required to

judge whether a regulation is “significant” and there-

fore subject to the procedural requirements of the

order or whether it may follow other specialized de-

velopment procedures. EPA labels these and other

regulations as “specialized”. I have reviewed this

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regulation and determined that it is a specialized

regulation not subject to the procedural requirements

of Executive Order 12044.

(42 U.S.C. 7401-7642)

Dated: October 29, 1979.

Alvin R. Morris,

Acting Regional Administrator.

[FR Doc. 79-34447 Filed 11-6-79; 8:45 am]

BILLING CODE 6560-01-M

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APPENDIX B

Interstate SO. Impacts

Another topic which you asked me to address is the

issue of interstate SO., impacts, especially the im-

pact of the two power plants, emissions on Pennsyl-

vania. Our original concept in addressing interstate

impacts and this analysis was to simply ignore state

borderlines. The receptor field around the Mitchell

power plant extends into Ohio and West Virginia and

was chosen without regard to the political borderline.

The Mitchell power plant was not modeied in Penn-

sylvania simply because earlier preliminary modeling

which set up the receptor network to be used around

Mitchell indicated that the concentration would peak

well before the plume reaches Pennsylvania. The

CRSTER receptor rings were set up deliberately in

the area of peak concentration. The receptor ring

farthest from the plant was at a distance of 11 kilo-

meters, while the distance to the nearest border of the

Commonwealth of Pennsylvania is 26 kilometers. We

did not at the time feel it necessary to model within

the Commonwealth of Pennsylvania because we ob-

served the concentrations that we calculated dropping

off as we approach 11 kilometers. Unless there is a

terrain obstacle sticking up into a plume, there is

no way that a higher concentration can be observed

at a farther distance. There is no such terrain ob-

stacle in Western Pennsylvania. In the case of the

Harrison plant, the distance to the nearest Pennsyl-

vania border is 3714 kilometers, and the same reason-

ing applied.

In response to your request, however, we have done

an express analysis of the impact of these regulatory

changes on the air quality of Pennsylvania. I will

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again stress that the distances involved are large.

The 26 kilometers distance from the Mitchell plant

is not excessive but the 37 kilometers distance from

the Harrison plant to Pennsylvania is greater than

we would normally prefer to model using conven-

tional Gaussian techniques. We consider conventional

Gaussian models to be reliable at approximately 30

kilometers and limit our normal analysis to a dis-

tance of 50 kilometers because beyond that distance

the models are considered quite unreliable. This

would allow us to model areas immediately within

the borders of Pennsylvania but would not allow us

to address the impact of these two power plants on

areas such as Pittsburgh where the most serious of

the SO. problems are. However, air pollution does

not become more concentrated at greater distances

from a source, it becomes less concentrated, so a

look at the concentrations as the plume enters Penn-

sylvania will give an upper bound on the maximum

concentrations which would occur in the State. In

the process of rerunning the CRSTER model for

Mitchell and Harrison we added receptors within

the border of Pennsylvania. This was done by re-

placing the outer receptor rings around both plants

with partial rings which would give a field of re-

ceptors immediately across the Pennsylvania border.

In the case of Mitchell a receptor ring was chosen

at thirty kilometers and in the case of Harrison this

receptor ring was chosen at a distance of forty

kilometers from the plants. This resulted in six re-

ceptors beyond the Pennsylvania border around the

Mitchell plant and five receptors beyond the Penn-

sylvania border around the Harrison plant. For con-

venience I will summarize the results of this analysis

by reporting only the highest concentrations recorded

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in the State of Pennsylvania from each of the plants.

This will be the highest observed annual concentra-

tion of any of the receptor points, the second highest

24 hour concentration at any of the receptor points,

and the second highest three hour concentration at

any of the receptor points. This form of reporting

will necessarily distort the picture of the impact of

Pennsylvania because it will present only the maxi-

mum concentrations. One must recognize that the

average concentrations or normal concentrations will

be considerably lower than these reported values. Also,

as one moves farther into Pennsylvania, the concen-

trations will be expected to drop off and hence the

concentrations that I am reporting here are the high-

est that would be expected from the plants as they

impact on Pennsylvania. I will first report the an-

nual average concentration at the highest receptor

in Pennsylvania from the Mitchell plant. This will

be reported for the years 1964, 1970, 1971, 1972,

1973, 1974, 1975, 1976 and 1977 in that order. These

concentrations in micrograms per cubic meter are

2.35, 2.71, 2.67, 2.47, 2.27, 2.20, 1.88, 2.46 and 2.74.

The second highest of 24 hour concentrations in the

same order are 22.1 microgram per cubic meter,

28.5, 28.5, 33.4, 22.8, 25.1, 25.1, 34.0, 30.9. Simi-

larly, the 3 hour concentrations from the Mitchell

plant at the highest receptor in the same order are

86.2 micrograms per cubic meter 78.6, 96.2, 68.4,

80.6, 91.1, 79.6, 72.0, 88.8. It can be readily observed

here that the concentrations from the Mitchell plant

are a small fraction of the air quality standards.

These concentrations resulted from modeling Mitchell

with its 1974 annual average fuel content of 3.62

percent. They maybe scaled upward by simply multi-

plying by 4.9 over 3.62 to obtain the total contribu-

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tion of the plant if it were burning its maximum

fuel under the new regulations. This results in an-

nual average concentration of 3.71 micrograms per

cubic meter from the plant for the meteorological

year 1977 which is the highest of those which I pre-

viously quoted, a 24 hour contribution of 46 micro-

grams per cubic meter for the meteorological year

1976 which is again the highest of those previously

quoted, and a 3 hour concentration of 130 micro-

grams per cubic meter for the meteorological year

1971.

Similarly, I have reviewed the calculated concentra-

tions in Pennsylvania resulting from emissions of the

Harrison power plant. I will report these concentra-

tions in the same format that I reported them for

Mitchell. The annual concentrations from Harrison

for the years 1964, 1970, 1971, 1972, 1973, 1974,

1975, 1976 and 1977 are: 4.52 micrograms per cubic

meter, 3.97, 3.70, 3.74, 4.43, 4.15, 3.94, 4.47 and 4.80;

the second high 24 hour concentrations are 76.6, 58.8,

51.4, 65.8, 69.7, 53.1, 55.2, 67.1, 54.9. The 3 hour

concentrations are: 568 micrograms per cubic meter,

347, 304, 373, 307, 211, 344, 344, 329. These results

were modeled assuming a sulfur content in fuel of

3.3 percent which was from 1974 annual average.

The regulation is 3.2 percent so the actual impact

on Pennsylvania if che plant were to burn its regu-

lated sulfur content for the entire year would be

somewhat less than these numbers, but the numbers

do give a good idea of the maximum impact of the

plant on Pennsylvania. Again, there are no predicted

violations of any of the air quality standards. Also,

it should be realized that the area where these con-

centrations occur from Harrison is near the southern

border of Pennsylvania and is a region with little

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local SO. contribution. The impact on any nonattain-

ment area within Pennsylvania would be considerably

less than this. It should be noted that the choice of

load conditions was based on a maximum in the area

near the plants, not at a large distance. The con-

servative nature of the calculation will be somewhat

offset by this, so the concentrations may be considered

a realistic maximum value.

. 6. coveenmant paimtine ortet 1962 372074 872