P.2 

Federal Register / Vol. 48, No. 80 / Monday, March 28, 1983 / Notices 12S2S 

Laboratory, 2565 Plymouth Road, Ann 

Arbor, Michigan 48105. 

FOB FURTHER «MF®RK]flTll@M ©©NYAGT: 

Lois Platte (313) 668-4308, Phil Lorang 

(313) 688-4374, or Tom Darlington (313) 

668-4313, Emission Control Technology 

Division, U.S. Environmental Protection 

Agency, 2565 Plymouth Road, Ann 

Arbor, Michigan 48105. 

SyMUlKEMTOKV ONFOHCaAYIOM: EPA's 

current estimates of emission factors for 

motor vehicles are contained in the 

report "Compilation of Air Pollutant 

Emission Factors: Highway Mobile 

Sources," March 1981 (EPA-460/3-81-

005). The emission factors and the 

arithmetical procedures for combining 

them into an estimate of the composite 

emission factors for a motor vehicle 

fleet have been automated in the 

computer program MOBILE2. The report 

and computer program were developed 

in 1980, and EPA perceives that in the 

intervening period enough additional 

information has become available to 

warrant consideration of revisions to 

both. 

Although EPA is not required to invite 

public participation during the revision 

of the motor emission factors, EPA 

believes a series of public workshops 

will facilitate EPA's revision process by 

enabling EPA to receive valuable 

technical information in a timely fashion 

and to receive suggestions from those 

parties who may otherwise be interested 

in the revision process and its outcome. 

The workshop announced here is the 

third of a series. At this third workshop, 

EPA and other participants plan to 

discuss several issues related to the 

previous workshop. The previous 

workshop attempted to identify all of 

the issues which could be addressed in 

a revision to MOBILE2. Some of the 

issues were more important than others, 

and some could not be addressed by 

either current or planned testing 

because of resource problems. In the 

third workshop, EPA will identify the 

specific revisions which are feasible for 

EPA to accomplish given the priorities 

and resource needs of those revisions. 

Also, presentations and discussions will 

be held on the topics of 1981 and later 

emission factors, high altitude emission 

factors, lead emission factors, cold 

temperature correction factors, heavyduty vehicle fuel economy, and the 

status of planned heavy-duty engine 

testing. Suggestions for additional topics 

should be made in advance of the 

workshop. Because of the technical 

nature of the agenda, participants 

should be familiar with the existing 

emissions factors and MOBILE2 to most 

fully contribute to the discussions. 

This workshop will not discuss the 

programming aspects of the MOBILE2 

computer program, such as its interface 

with other programs used in preparing 

emission inventories and air quality 

plans, and the language and equipment 

requirements of the program, A 

workshop may be scheduled at a later 

date to meet with parties interested in 

these areas in particular. 

No rulemaking action is anticipated in 

connection with the revisions that will 

be the subject of this workshop. 

Consequently, the workshop will be 

very informal. There will be no 

opportunity for prepared statements in 

general, although prepared remarks will 

be welcome on specific issues as those 

are brought up for discussion. Although 

no public docket will be kept, written 

submissions are welcome at any time 

and may be brought to the workshop or 

mailed to Lois Platte, Phil Lorang, or 

Tom Darlington at the address set out 

about. 

The Agency in addition requests that 

all persons planning to attend the 

workshop contact Lois Platte, Phil 

Lorang or Tom Darlington. 

Dated: March 21,1983. 

Charles L. Elkins, 

Acting Assistant Administrator, Office of Air, 

Noise and Radiation. 

[FR Doc. 83-7839 Filed 3-25-83: 8:45 am) 

BILLING CODE 6560-E&-0) 

[AD-FRL 2331-4] 

GMlon&l Alt' IP®faffli@ini Sorts-©! 

Under Pub. L. 92-463, notice is hereby 

given that a meeting of the National Air 

Pollution Control Techniques Advisory 

Committee will be held on April 26, 27, 

and 28,1983, at the Royal Villa Hotel, 

Royal King Hall I, 6339 Glenwood 

Avenue, Raleigh, North Carolina 27612. 

The'commercial telephone number is 

(919) 782-4433. 

' The tentative agenda for the meeting 

is as follows: 

April 26 (Tuesday)—8:30 a.m. 

Polymers and Resins, New Source 

Performance Standard (Section 111 of 

the Clean Air Act). 

Wool Fiberglass Insulation 

Manufacturing, New Source 

Performance Standard (Section 111 of 

the Clean Air Act). 

Grain Elevator Industry, Review of 

Standards of Performance for New 

Stationary Sources (Section 111 of the 

Clean Air Act). 

Primary Copper Smelters, Review of 

Standards of Performance for New 

Stationary Sources (Section 111 of the 

Clean Air Act). 

April 27 (Wednesday)—8:30 a.m. 

Continuation of April 26—As 

Required. 

Kraft Pulp Mills, Revision of 

Standards of Performance for New 

Stationary Sources (Section 111 of the 

Clean Air Act). 

Refinery Sulfur Plants, Review of 

Standards of Performance for New 

Stationary Sources (Section 111 of the 

Clean Air Act). 

Inorganic Arsenic, Status Report on 

Development of National Emission 

Standards for Hazardous Air Pollutants 

(Section 112 of the Clean Air Act). 

April 28 (Thursday)—8:30 a.m. 

Continuation of April 27—As 

Required. 

All meetings are open to the public. 

Anyone wishing to make a presentation 

should contact Ms. Mary Jane Clark at 

the Emission Standards and Engineering 

Division (MD-13), U.S. Environmental 

Protection Agency, Research Triangle 

Park, North Carolina 27711, by April 7, 

1983. The commercial telephone number 

is (919) 541-5571, and the FTS number is 

629-5571. 

The dockets containing material 

relevant to polymers and resins (A-82-

19), wool fiberglass insulation 

manufacturing (A-80-27), grain elevator 

industry (A-83-14), primary copper 

smelters (A-81-42), kraft pulp mills (A82-36), and refinery sulfur plants (A-83-

16) are located in the U.S. 

Environmental Protection Agency, 

Central Docket Section, West Tower 

Lobby-Gallery 1,401M Street, S.W., 

Washington, D.C. 20460. The dockets 

may be inspected between 8:00 a.m. and 

4:00 p.m. on wekdays, and a reasonable 

fee may be charged for copying. 

Dated: March 18,1983. 

Kathleen M. Bennett, 

Assistant Administrator for Air, Noise, and 

Radiation. 

[FR Doc. 83-7841 Filed 3-25-83: 8:45 am] 

BILLING CODE 65SO-50-U 

IOPTS-51438D; TSH-FRL 2332-3] 

I ES 

AGEMCV: Environmental Protection 

Agency (EPA). 

aSTlON: Notice. 

SUR2E]&RV: EPA is extending the review 

period for an additional SO days for 

premanufacture notices (PMN) for the 

two substances, PMN's-83-35 and 83-38,