44928 Federal Register / Vol. 62, No. 164 / Monday, August 25, 1997 / Proposed Rules

Dated: August 18, 1997.

Carol M. Browner,

Administrator.

For reasons set forth in the preamble,

part 51 of chapter I of title 40 of the

Code of Federal Regulations is proposed

to be amended as follows:

PART 51—REQUIREMENTS FOR

PREPARATION, ADOPTION, AND

SUBMITTAL OF IMPLEMENTATION

PLANS.

1. The authority citation for part 51 is

revised to read as follows:

Authority: 42 U.S.C. 7401–7671q.

2. Section 51.100 is proposed to be

amended by revising paragraph (5)

introductory text and paragraph (s)(1) to

read as follows:

§ 51.100 Definitions.

* * * * *

(s) Volatile organic compounds (VOC)

means any compound of carbon,

excluding carbon monoxide, carbon

dioxide, carbonic acid, metallic carbides

or carbonates, and ammonium

carbonate, which participates in

atmospheric photochemical reactions.

(1) This includes any such organic

compound other than the following,

which have been determined to have

negligible photochemical reactivity:

methane; ethane; methylene chloride

(dichloromethane); 1,1,1-trichloroethane

(methyl chloroform); 1,1,2-trichloro1,2,2-trifluoroethane (CFC-113);

trichlorofluoromethane (CFC–11);

dichlorodifluoromethane (CFC–12);

chlorodifluoromethane (HCFC–22);

trifluoromethane (HFC–23); 1,2-dichloro

1,1,2,2-tetrafluoroethane (CFC–114);

chloropentafluoroethane (CFC-115);

1,1,1-trifluoro 2,2-dichloroethane

(HCFC–123); 1,1,1,2-tetrafluoroethane

(HFC–134a); 1,1-dichloro 1-fluoroethane

(HCFC–141b); 1-chloro 1,1-

difluoroethane (HCFC-142b); 2-chloro1,1,1,2-tetrafluoroethane (HCFC–124);

pentafluoroethane (HFC–125); 1,1,2,2-

tetrafluoroethane (HFC-134); 1,1,1-

trifluoroethane (HFC–143a); 1,1-

difluoroethane (HFC–152a);

parachlorobenzotrifluoride (PCBTF);

cyclic, branched, or linear completely

methylated siloxanes; acetone;

perchloroethylene (tetrachloroethylene);

3,3-dichloro-1,1,1,2,2-

pentafluoropropane (HCFC–225ca); 1,3-

dichloro-1,1,2,2,3-pentafluoropropane

(HCFC–225cb); 1,1,1,2,3,4,4,5,5,5-

decafluoropentane (HFC 43–10mee);

difluoromethane (HFC–32);

ethylfluoride (HFC–161); 1,1,1,3,3,3-

hexafluoropropane (HFC–236fa);

1,1,2,2,3-pentafluoropropane (HFC–

245ca); 1,1,2,3,3-pentafluoropropane

(HFC–245ea); 1,1,1,2,3-

pentafluoropropane (HFC–245eb);

1,1,1,3,3-pentafluoropropane (HFC–

245fa); 1,1,1,2,3,3-hexafluoropropane

(HFC–236ea); 1,1,1,3,3-

pentafluorobutane (HFC–365mfc);

chlorofluoromethane (HCFC–31); 1

chloro-1-fluoroethane (HCFC–151a); 1,2-

dichloro-1,1,2-trifluoroethane (HCFC–

123a); 1,1,1,2,2,3,3,4,4-nonafluoro-4-

methoxy-butane (C4F9OCH3); 2-

(difluoromethoxymethyl)-1,1,1,2,3,3,3-

heptafluoropropane ((CF3)2CFCF2OCH3);

1-ethoxy-1,1,2,2,3,3,4,4,4-

nonafluorobutane (C4F9OC2H5); 2-

(ethoxydifluoromethyl)-1,1,1,2,3,3,3-

heptafluoropropane

((CF3)2CFCF2OC2H5); methyl acetate and

perfluorocarbon compounds which fall

into these classes:

(i) Cyclic, branched, or linear,

completely fluorinated alkanes;

(ii) Cyclic, branched, or linear,

completely fluorinated ethers with no

unsaturations;

(iii) Cyclic, branched, or linear,

completely fluorinated tertiary amines

with no unsaturations; and

(iv) Sulfur containing

perfluorocarbons with no unsaturations

and with sulfur bonds only to carbon

and fluorine.

* * * * *

[FR Doc. 97–22509 Filed 8–22–97; 8:45 am]

BILLING CODE 6560–50–P

ENVIRONMENTAL PROTECTION

AGENCY

40 CFR Part 52

[OH104–1B; FRL–5877–8]

Approval and Promulgation of State

Implementation Plan; Ohio

AGENCY: Environmental Protection

Agency.

ACTION: Proposed rule.

SUMMARY: The United States

Environmental Protection Agency

(USEPA) is proposing to approve a June

10, 1997, request from Ohio, for a State

Implementation Plan (SIP) maintenance

plan revision for the following areas:

Toledo area (including Lucas and Wood

counties), the Cleveland-Akron-Lorain

area (including Lorain, Cuyahoga, Lake,

Ashtabula, Geauga, Medina, Summit

and Portage counties), and the DaytonSpringfield area (including

Montgomery, Clark, Greene, and Miami

counties). The maintenance plan

revisions are requesting to allocate to

the mobile source emissions budget for

transportation conformity a portion of

the existing ‘‘Safety Margins.’’ The

safety margin is the difference between

the attainment inventory level of the

total emissions and the projected levels

of the total emissions in the final year

of the maintenance plan.

DATES: Written comments on this

proposed action must be received by

September 24, 1997.

ADDRESSES: Written comments should

be sent to: J. Elmer Bortzer, Chief,

Regulation Development Section, Air

Programs Branch, (AR–18J), U.S.

Environmental Protection Agency,

Region 5, 77 West Jackson Boulevard,

Chicago, Illinois, 60604.

FOR FURTHER INFORMATION CONTACT:

Scott Hamilton, Environmental

Scientist, Regulation Development

Section, Air Programs Branch (AR–18J),

U.S. Environmental Protection Agency,

Region 5, 77 West Jackson Boulevard,

Chicago, Illinois 60604, (312) 353–8656.

SUPPLEMENTARY INFORMATION: For

additional information, see the Direct

Final rule which is located in the Rules

section of this Federal Register. Copies

of the requests are available for

inspection at the following address:

(Please contact Scott Hamilton at (312)

353–4775 before visiting the Region 5

office.) USEPA Region 5, Air and

Radiation Division, 77 West Jackson

Boulevard, Chicago, Illinois 60604–

3590.

List of Subjects in 40 CFR Part 52

Environmental protection, Air

pollution control, Hydrocarbons,

Intergovernmental relations, Ozone,

Nitrogen Oxides, Transportation

conformity.

Dated: August 8, 1997.

David A. Ullrich,

Acting Regional Administrator.

[FR Doc. 97–22068 Filed 8–22–97; 8:45 am]

BILLING CODE 6560–50–P

ENVIRONMENTAL PROTECTION

AGENCY

40 CFR Part 52

[CA 034–0049b; FRL–5880–5]

Approval and Promulgation of State

Implementation Plans; California State

Implementation Plan Revision, Bay

Area Air Quality Management District

AGENCY: Environmental Protection

Agency (EPA).

ACTION: Proposed rule.

SUMMARY: EPA is proposing to approve

a revision to the California State

Implementation Plan (SIP) which

concerns the control of volatile organic

compound (VOC) emissions from the

storage of organic liquids.