p.1 

OAR Box 1865 

Prepped by Charmelle Mathews 

Document Number: 

194)FR7-2f1986 

Docket Number: 

A-83-27 

Printed 12/3/2008 3:22:25 PM Sheet 194 Of 198 
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VII. Demonstration of Reasonable 

Further Progress 

The CO SIP submittal contains the 

anticipated yearly CO emission 

reductions in the CBD along with the 

yearly reduction needed to meet 

USEPA's "straight line" reasonable 

further progress (RFP) requirement. The 

data indicate that RFP was achieved in 

the CBD after 1984 and will be 

maintained through 1987. 

The SIP also presents a graphical CO 

RFP demonstration for the worst-case 

hotspot intersection. This graphical 

presentation demonstrates that RFP will 

be achieved and maintained at this 

intersection through 1987. 

VIII. USEPA Technical Review and 

Determination 

USEPA's review of the ambient 

monitor strip chart record for November 

24,1983, supports the Indianapolis 

APCD view that this second-high 

concentration at the L.S. Ayers site 

should be discredited due to probable 

montitor instability. USEPA has 

determined that the appropriate secondhigh 8-hour design concentration should 

be 11.7 ppm, which was monitored in 

1986. 

It should be noted that USEPA does 

not agree with the manner in which the 

State calculated the CBD-wide CO 

emission rates. Vehicles travel at 

different speeds within the CBD. As may 

be noted from the speed-specific 

emission factors listed in the Indiana 

SIP revision, emission factors do not 

vary linearly with speed. The use of a 

single average vehicle speed to calculate 

a CBD total emission rate may lead to 

an incorrectly calculated emission rate. 

USEPA believes that it would have been 

more technically correct to have 

determined the VMT distribution as a 

function of vehicle speed with the CBD 

emission rate based on this VMT 

distribution. However, review of the 

speed-specific emission rates indicates 

that these emission rates drop by 

approximately the same percentage 

between 1983 and 1986 regardless of 

vehicle speed. The same result is 

assumed to be the case between 1981 

and 1987. As a result, the use of a single, 

average speed rather than a VMT-speed 

distribution to calculate the CBD total 

emission rate should have little effect on 

the results of the rollback analysis, 

which is only sensitive to the percentage 

change in emissions. Therefore, USEPA 

does agree with the general results of 

the analysis. 

USEPA has determined that the SIP 

has successfully demonstrated 

attainment of the CO NAAQS by 

December 31,1987. Assuming that the 

L.S. Ayres site has the worst-case CO 

concentration site in the CBD, the 

rollback analysis shows CO emissions 

must be reduced by 22.8 percent from 

the 1981 CBD total. The SIP 

demonstrates a 24.5 percent emission 

reduction by 1987 based on daily 

emissions, or a 25.8 percent emission 

reduction by 1987 based on annual 

emissions. 

USEPA's review of the hotspot 

analysis as revised in the October 7, 

1985, submittal shows that a 

demonstration of attainment by 

December 31,1987, has been 

successfully made for the worst-case 

intersections. The ambient monitoring 

from the three sites does support the 

view that the CO nonattainment 

problem in downtown Indianapolis is 

hotspot in nature and, therefore, by 

developing an approvable plan for the 

hotspot problems, Indiana has assured 

the attainmenmt and maintenance of the 

CO NAAQS throughout the 

nonattainment area. Additionally, 

USEPA has determined that the Marion 

County CO SIP appropriately 

demonstrates RFP towards attainment 

of the CO NAAQS. 

IX. Conclusion 

USEPA proposes to approve the 

Marion County CO SIP as demonstrating 

attainment of the NAAQS by December 

31,1987, and RFP in the existing 

nonattainment area. USEPA also 

proposes to approve the adopted 

Transportation Control Measure (TCM). 

Under 5 U.S.C. 605(b), the 

Administrator has certified that SIP 

approvals do not have a significant 

impact on a substantial number of small 

entities. (See 46 FR 8709). 

The Office of Management and Budget 

has exempted this rule from the 

requirements of section 3 of Executive 

Order 12291. 

Authority: 42 U.S.C. 7401-7642. 

Dated: March 27,1986. 

Valdas V. Adamkus, 

Regional Administrator. 

[FR Doc. 86-16388 Filed 7-21-88; 8:45 am] 

BILLING CODE 6560-50-M 

40 CFR Part 50 

(AD-FRL-3052-9] 

Standards of Performance for New 

Stationary Sources; IndustrialComrmercial-lnstitutional Steam 

Generating Units 

AGENCY: Environmental Protection 

Agency (EPA). 

ACTION: Rescheduling of Public Hearing 

and Extension of Public Comment 

Period. 

SUMMARY: On June 19,1986, new source 

performance standards were proposed 

to limit sulfur dioxide emissions from 

new industrial-commercial-institutional 

steam generating units of more than 100 

million Btu/hr heat input capacity (51 FR 

22384). On June 24,1986, the Council of 

Industrial Boiler Owners requested that 

the public hearing be rescheduled and 

the public comment period be extended. 

As a result, as noted below, the public 

hearing has been rescheduled to 

September 4,1986, and the close of the 

public comment period has been 

extended to October 2,1986. 

DATES: Comments. Comments on the 

proposed standards must be received by 

October 2,1986. 

Public Hearing. A public hearing will 

be held on September 4,1986, beginning 

at 10:00 a.m. 

Request to Speak at Hearing. Persons 

wishing to present oral testimony must 

request to speak at the public hearing by 

calling Ann Eleanor at (919) 541-5578 by 

August 8,1986. 

ADDRESSES: Public Hearing: The public 

hearing will be held at EPA's Office of 

Administration Auditorium, Research 

1 riangle Park, North Carolina. 

Docket: Docket No. A-83-27 

:ontaining supporting information used 

in developing the proposed standards is 

available for public inspection and 

copying between 8:00 a.m. and 4:00 p.m., 

Monday through Friday, at EPA's 

Central Docket Section, West Tower 

Lobby, Gallery 1, Waterside Mall, 401 M 

Street, SW., Washington, DC 20460. A 

reasonable fee may be charged for 

copying. 

FOR FURTHER INFORMATION CONTACT: 

Mr. Fred Porter or Ms. Dianne Byrne, 

Standards Development Branch, 

Emission Standards and Engineering 

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

Protection Agency, Research Triangle 

Park, North Carolina 27711. Telephone: 

(919) 541-5578. 

Dated: July 14,1986. 

Don R. Clay, 

Acting Assistant Administrator for Air und 

Radiation. 

[FR Doc. 86-16390 Filed 7-21-flO; 8:45 «m| 

BILLING CODE 6560-50-M