32618 Federal Register / Vol. 66, No. 116 / Friday, June 15, 2001 / Notices

2001, from 9 a.m. to 5:30 p.m. and June

29, 2001, from 8 a.m. to noon.

ADDRESSES: The meeting will be held at

the Embassy Suites Hotel, 1900

Diagonal Road, Alexandria, VA, 22314.

The hotel is across from the King Street

Metro Station.

FOR FURTHER INFORMATION CONTACT: For

general information contact: Barbara

Cunningham, Acting Director,

Environmental Assistance Division,

Office of Pollution Prevention and

Toxics (7408), Environmental Protection

Agency, 1200 Pennsylvania Ave., NW.,

Washington, DC 20460; telephone

number: (202) 260–1761.

For technical information contact:

George Hagevik, National Conference of

State Legislatures, 1560 Broadway, Suite

700, Denver, CO 80202; telephone

number: (303) 839–0273 and FAX: (303)

863–8003; e-mail address:

george.hagevik@ncsl.org

Darlene Harrod, Environmental

Assistance Division (7408), Office of

Pollution Prevention and Toxics,

Environmental Protection Agency, 1200

Pennsylvania Ave., NW., Washington,

DC 20460; telephone number: (202)

260–6904 and FAX: (202) 260–2219; email address:

harrod.darlene@epamail.epa.gov.

SUPPLEMENTARY INFORMATION:

I. Does this Notice Apply to Me?

This action is directed to the public

in general. This action may, however, be

of interest to all parties interested in

FOSTTA and hearing more about the

perspectives of the States on EPA

programs and the information exchange

regarding important issues related to

human health and environmental

exposure to toxics. Since other entities

may also be interested, the Agency has

not attempted to describe all the specific

entities that may be affected by this

action. However, in the interest of time

and efficiency, the meetings are

structured to provide maximum

opportunity for State and EPA

participants to discuss items on the

predetermined agenda. At the discretion

of the chair, an effort will be made to

accommodate participation by observers

attending the proceedings. If you have

any questions regarding the

applicability of this action to a

particular entity, consult the technical

people listed under FOR FURTHER

INFORMATION CONTACT.

II. How Can I Get Additional

Information, Including Copies of this

Document or Other Related Documents?

1. Electronically. You may obtain

electronic copies of this document, and

certain other related documents that

might be available electronically, from

the NCSL Web site at http://

www.ncsl.org/programs/esnr/fostta/

fostta.htm. To access this document on

the EPA Internet Home Page go to http:/

/www.epa.gov and select ‘‘Laws and

Regulations’’ and then look up the entry

for this document under the ‘‘Federal

Register—Environmental Documents.’’

You can also go directly to the Federal

Register listings at http://www.epa.gov/

fedrgstr/FOSTTA.

2. Facsimile. Notify the persons listed

under FOR FURTHER INFORMATION

CONTACT if you would like any of the

documents sent to you via fax.

III. Purpose of Meeting

The Chemicals Information and

Management Project will focus on EPA’s

ChemRTK program and will work to

develop a coordinated effort involving

Federal, State, and Tribal agencies. The

scope of the project’s discussions will

include programs related to the

collection, evaluation, and

dissemination of chemical information,

as well as data use, data integration, and

chemical risk screening issues

associated with these programs. The

project will also consider, on an as

needed basis, chemical issues which

had been previously addressed with

FOSTTA, such as community-based

environmental protection,

biotechnology, asbestos, and other

durable fibers. The Chemicals

Information and Management Project

replaces the Chemical Management

Project.

The tentative agenda items identified

by the new Chemicals Information and

Management Project are:

1. High Production Volume Challenge

Program

2. Voluntary Children’s Chemical

Evaluation Programs

3. Other Topics as Appropriate

Stephen L. Johnson, Acting Assistant

Administrator for the Office of

Prevention, Pesticides and Toxic

Substances, and Dr. William H. Sanders

III, Director, Office of Pollution

Prevention and Toxics, have been

invited to speak.

IV. How Can I Request To Participate

in this Meeting?

You may submit a request to

participate in this meeting in the mail

or electronically to the names under the

FOR FURTHER INFORMATION CONTACT

section. Do not submit any information

in your request that is considered

Confidential Business Information. Your

request must be received by EPA on or

before June 26, 2001.

List of Subjects

Environmental protection.

Dated: June 7, 2001.

Barbara Cunningham,

Acting Director, Environmental Assistance

Division, Office of Pollution Prevention and

Toxics.

[FR Doc. 01–15152 Filed 6–14–00; 8:45 am]

BILLING CODE 6560–50–S

ENVIRONMENTAL PROTECTION

AGENCY

[PF–1030; FRL–6788–2]

Notice of Filing a Pesticide Petition to

Establish a Tolerance fora Certain

Pesticide Chemical in or on Food

AGENCY: Environmental Protection

Agency (EPA).

ACTION: Notice.

SUMMARY: This notice announces the

initial filing of a pesticide petition

proposing the establishment of

regulations for residues of a certain

pesticide chemical in or on various food

commodities.

DATES: Comments, identified by docket

control number PF–1030, must be

received on or before July 16, 2001.

ADDRESSES: Comments may be

submitted by mail, electronically, or in

person. Please follow the detailed

instructions for each method as

provided in Unit I.C. of the

SUPPLEMENTARY INFORMATION. To ensure

proper receipt by EPA, it is imperative

that you identify docket control number

PF–1030 in the subject line on the first

page of your response.

FOR FURTHER INFORMATION CONTACT: By

mail: Dennis McNeilly, InsecticideRodenticide Branch, Registration

Division (7505C), Office of Pesticide

Programs, Environmental Protection

Agency, 1200 Pennsylvania Ave., NW.,

Washington, DC 20460; telephone

number: (703) 308–6742; e-mail address:

mcneilly.dennis@epa.gov.

SUPPLEMENTARY INFORMATION:

I. General Information

A. Does this Action Apply to Me?

You may be affected by this action if

you are an agricultural producer, food

manufacturer or pesticide manufacturer.

Potentially affected categories and

entities may include, but are not limited

to:

Federal Register / Vol. 66, No. 116 / Friday, June 15, 2001 / Notices 32619

Categories NAICS

codes

Examples of potentially affected entities

Industry 111 Crop production

112 Animal production

311 Food manufacturing

32532 Pesticide manufacturing

This listing is not intended to be

exhaustive, but rather provides a guide

for readers regarding entities likely to be

affected by this action. Other types of

entities not listed in the table could also

be affected. The North American

Industrial Classification System

(NAICS) codes have been provided to

assist you and others in determining

whether or not this action might apply

to certain entities. If you have questions

regarding the applicability of this action

to a particular entity, consult the person

listed under FOR FURTHER INFORMATION

CONTACT.

B. How Can I Get Additional

Information, Including Copies of this

Document and Other Related

Documents?

1. Electronically. You may obtain

electronic copies of this document, and

certain other related documents that

might be available electronically, from

the EPA Internet Home Page at http://

www.epa.gov/. To access this

document, on the Home Page select

‘‘Laws and Regulations’’ ‘‘Regulation

and Proposed Rules,’’ and then look up

the entry for this document under the

‘‘Federal Register—Environmental

Documents.’’ You can also go directly to

the Federal Register listings at http://

www.epa.gov/fedrgstr/.

2. In person. The Agency has

established an official record for this

action under docket control number PF–

1030. The official record consists of the

documents specifically referenced in

this action, any public comments

received during an applicable comment

period, and other information related to

this action, including any information

claimed as confidential business

information (CBI). This official record

includes the documents that are

physically located in the docket, as well

as the documents that are referenced in

those documents. The public version of

the official record does not include any

information claimed as CBI. The public

version of the official record, which

includes printed, paper versions of any

electronic comments submitted during

an applicable comment period, is

available for inspection in the Public

Information and Records Integrity

Branch (PIRIB), Rm. 119, Crystal Mall

#2, 1921 Jefferson Davis Highway,

Arlington, VA, from 8:30 a.m. to 4 p.m.,

Monday through Friday, excluding legal

holidays. The PIRIB telephone number

is (703) 305–5805.

C. How and to Whom Do I Submit

Comments?

You may submit comments through

the mail, in person, or electronically. To

ensure proper receipt by EPA, it is

imperative that you identify docket

control number PF–1030 in the subject

line on the first page of your response.

1. By mail. Submit your comments to:

Public Information and Records

Integrity Branch (PIRIB), Information

Resources and Services Division

(7502C), Office of Pesticide Programs

(OPP), Environmental Protection

Agency, 1200 Pennsylvania Ave., NW.,

Washington, DC 20460.

2. In person or by courier. Deliver

your comments to: Public Information

and Records Integrity Branch (PIRIB),

Information Resources and Services

Division (7502C), Office of Pesticide

Programs (OPP), Environmental

Protection Agency, Rm. 119, Crystal

Mall #2, 1921 Jefferson Davis Highway,

Arlington, VA. The PIRIB is open from

8:30 a.m. to 4 p.m., Monday through

Friday, excluding legal holidays. The

PIRIB telephone number is (703) 305–

5805.

3. Electronically. You may submit

your comments electronically by e-mail

to: opp-docket@epa.gov, or you can

submit a computer disk as described

above. Do not submit any information

electronically that you consider to be

CBI. Avoid the use of special characters

and any form of encryption. Electronic

submissions will be accepted in

Wordperfect 6.1/8.0 or ASCII file

format. All comments in electronic form

must be identified by docket control

number PF–1030. Electronic comments

may also be filed online at many Federal

Depository Libraries.

D. How Should I Handle CBI That I

Want to Submit to the Agency?

Do not submit any information

electronically that you consider to be

CBI. You may claim information that

you submit to EPA in response to this

document as CBI by marking any part or

all of that information as CBI.

Information so marked will not be

disclosed except in accordance with

procedures set forth in 40 CFR part 2.

In addition to one complete version of

the comment that includes any

information claimed as CBI, a copy of

the comment that does not contain the

information claimed as CBI must be

submitted for inclusion in the public

version of the official record.

Information not marked confidential

will be included in the public version

of the official record without prior

notice. If you have any questions about

CBI or the procedures for claiming CBI,

please consult the person identified

under FOR FURTHER INFORMATION

CONTACT.

E. What Should I Consider as I Prepare

My Comments for EPA?

You may find the following

suggestions helpful for preparing your

comments:

1. Explain your views as clearly as

possible.

2. Describe any assumptions that you

used.

3. Provide copies of any technical

information and/or data you used that

support your views.

4. If you estimate potential burden or

costs, explain how you arrived at the

estimate that you provide.

5. Provide specific examples to

illustrate your concerns.

6. Make sure to submit your

comments by the deadline in this

notice.

7. To ensure proper receipt by EPA,

be sure to identify the docket control

number assigned to this action in the

subject line on the first page of your

response. You may also provide the

name, date, and Federal Register

citation.

II. What Action is the Agency Taking?

EPA has received a pesticide petition

as follows proposing the establishment

and/or amendment of regulations for

residues of a certain pesticide chemical

in or on various food commodities

under section 408 of the Federal Food,

Drug, and Cosmetic Act (FFDCA), 21

U.S.C. 346a. EPA has determined that

this petition contains data or

information regarding the elements set

forth in section 408(d)(2); however, EPA

has not fully evaluated the sufficiency

of the submitted data at this time or

whether the data support granting of the

petition. Additional data may be needed

before EPA rules on the petition.

List of Subjects

Environmental protection,

Agricultural commodities, Feed

additives, Food additives, Pesticides

and pests, Reporting and recordkeeping

requirements.

32620 Federal Register / Vol. 66, No. 116 / Friday, June 15, 2001 / Notices

Dated: lllllllllllllllll

lllllllllllllllllllll

Director, Registration Division, Office of

Pesticide Programs.

Summary of Petition

The petitioner summary of the

pesticide petition is printed below as

required by section 408(d)(3) of the

FFDCA. The summary of the petition

was prepared by the petitioner and

represents the view of the petitioner.

EPA is publishing the petition summary

verbatim without editing it in any way.

The petition summary announces the

availability of a description of the

analytical methods available to EPA for

the detection and measurement of the

pesticide chemical residues or an

explanation of why no such method is

needed.

Dow AgroSciences

PP 62719-EUP-UL

EPA has received an Experimental

Use Permit Request and associated

temporary tolerance pesticide petition

(62719–EUP–UL) from Dow

AgroSciences, 9330 Zionsville Road,

Indianapolis, IN 46268 proposing,

pursuant to section 408(d) of the

FFDCA, 21 U.S.C. 346a(d), to amend 40

CFR part 180 by establishing a

temporary tolerance for residues of

fluoride in or on the raw agricultural

commodity walnuts at 12 parts per

million (ppm) and sulfuryl fluoride (SF)

in or on raisins at 0.0032 ppm and to

establish an exemption from the

requirement of a tolerance for fluoride

in or on raisins. EPA has determined

that the petition contains data or

information regarding the elements set

forth in section 408(d)(2) of the FFDCA;

however, EPA has not fully evaluated

the sufficiency of the submitted data at

this time or whether the data support

granting of the petition. Additional data

may be needed before EPA rules on the

petition.

A. Residue Chemistry

1. Plant metabolism. The metabolism

of SF is adequately understood for the

purpose of this tolerance. Potential

residues of SF fluoride and its

degradation product fluoride and sulfate

were investigated. Residues of SF in

treated commodities are transient and

rapidly decrease to very low (parts per

billion (ppb) or non-detectable levels.

Residues of fluoride and sulfate

resulting from the fumigation of

commodities with SF were measurable

and predictable. Sulfate as a terminal

residue of SF is not considered of

toxicological significance due to its

natural abundance and pervasiveness in

living systems.

2. Analytical method. Analytical

methods have been developed and

validated to determine the residues of

sulfuryl fluoride in walnuts and raisins.

The SF method is based on gas

chromatography/electron capture

detector (GC-ECD) with a limit of

quantitation (LOQ) of 4.7 ppb in

walnuts and 3.2 ppb in raisins. The

fluoride method utilizes a fluoride

specific electrode. The fluoride ion

method was validated with an LOQ of

2.2 ppm in raisins and 1.9 ppm in

walnuts.

3. Magnitude of residues. Residue

data in support of the proposed

temporary tolerances for SF and the

degradate of interest, fluoride in

walnuts and raisins have been

generated. SF residues in raisins, 1–day

post fumigation were all below the LOQ

with all but two of the measurements

were below the LOD of 1.1 ppb (mg/kg).

Fluoride residues in raisins measured 4

days-post fumigation were all less than

the LOQ with about half of the

observations below the Limit of

detection (LOD) of 0.75 ppm. The SF

residues in walnuts rapidly decreased to

levels ranging from <LOQ to 61.8 ppb at

three fumigation temperatures tested,

demonstrating the transient nature of

the SF residue. Fluoride residues in

walnuts measured 4 days-post

fumigation at three temperatures ranged

from 2.9 ppm to 8.0 ppm. On the basis of the residues of

fluoride that were evaluated, a tolerance

of 12.0 ppm is supported in walnuts for

fluoride. The rapid and complete

dissipation of SF residues from both

walnuts and raisins supports tolerances

for SF for walnuts and raisins at 2 ppm

and 0.0032 ppm, respectively. In

addition, the low concentrations of

fluoride found in raisins which are

indistinguishable from background

levels of fluoride in that commodity,

supports an exemption from from the

requirement of a tolerance for fluoride

in raisins under the USEPA’s Threshold

of Regulation Policy–Deciding Whether

a Pesticide with a Food Use Pattern

Needs a Tolerance.

B. Toxicological Profile

1. Acute toxicity. The acute LC50 for

SF is 642 ppm (1,088 milligrams/

kilogram body weight) for CD–1 mice

exposed for 4 hours.

2. Genotoxicty. Genetic toxicity did

not occur when SF was tested in

multiple in vivo and in vitro tests.

3. Reproductive and developmental

toxicity. Sulfuryl fluoride did not have

any effects on reproductive parameters

at dose levels that induced treatmentrelated effects in parental rats and

rabbits. In addition, a teratogenic

potential for SF was not demonstrated

in either rats or rabbits at dose levels

that induced maternal toxicity.

4. Subchronic toxicity. Several 2–

week repeated dose inhalation studies

indicate for mice a no observed adverse

effect level NOAEL of 30 ppm and for

rat, rabbit, and beagle dog a NOAEL of

100 ppm.

5. Chronic toxicity. The lowest

reported chronic NOAEL for SF is 5

ppm based on a 2–year inhalation study

with Fischer 344 rats and the parental

NOAEL in a 2–generation rat

reproduction study. There was no

evidence of carcinogenicity in 2–year rat

and 18–month mouse studies.

6. Animal metabolism. Rats fed a diet

that had been fumigated by SF at a rate

of 2 pounds/1,000 cu ft (containing

fluoride levels of 19 ppm above the

control level of 36 ppm) for 66 days

experienced an increase in the fluoride

content of their bones. The National

Research Council, in their 1993 report

on fluoride concluded that fluoride is

readily absorbed by the gut and rapidly

becomes associated with teeth and

bones. The remaining fluoride is

eliminated almost exclusively by the

kidneys with the rate of renal clearance

related directly to urinary pH.

7. Metabolite toxicology. Clinical

symptoms of acute fluoride poisoning in

humans are characterized by nausea,

vomiting, diarrhea, abdominal pain, and

paresthesia. The frequently cited

‘‘probably toxic dose,’’ the dose which

should trigger therapeutic intervention

and hospitalization, is 5 mg/kg bwt

calculated for the lowest third

percentile of the infant population. Five

to 10 grams of sodium fluoride is

considered the certainly lethal dose

(CLD) for a 70 kg adult (32 to 64 mg

fluoride per kg body weight). One

quarter of the CLD can be ingested

without producing serious acute toxicity

and is known as the safely tolerated

dose, i.e., 8 to 16 mg of fluoride per kg

of body weight. The Council on Dental

Therapeutics of the American Dental

Association recommends that ‘‘no more

than 264 mg of NaF (120 mg F) be

dispensed at any one time’’ in dental

treatments to prevent the accidental

poisoning of an infant weighing as little

as 10 kg. EPA (Cryolite RED decision,

August 1996) determined a Maximum

Concentration Limit Goal (MCLG) of

0.114 mg/kg/day for fluoride which

provides protection from any known or

anticipated adverse health effects. The

MCLG has been reviewed and supported

by the Surgeon General. The National

Toxicology Program (NTP) has

Federal Register / Vol. 66, No. 116 / Friday, June 15, 2001 / Notices 32621

concluded that there was ‘‘no evidence’’

of carcinogenic activity in male or

female mice administered sodium

fluoride in drinking water for 2–years.

8. Endocrine disruption. There is no

evidence from any studies to suggest

that SF or fluoride are endocrine

disrupters.

C. Aggregate Exposure

1. Dietary exposure. The Dietary

Exposure Evaluation Model (DEEM),

version 7.075, of Novigen Sciences, Inc.

was used to estimate the dietary

exposure to the U.S. population and

critical sub-populations resulting from

the use of SF on walnuts and raisins.

The highest potential acute exposures to

SF were to children ages 1–6 years

totaling 0.00008 mg/kg-bwt/day. The

highest potential acute exposure to

fluoride was to children ages 1–6 years

with a highest estimated exposure of

0.003 mg/kg-bwt/day. The highest

potential chronic exposures to SF was to

children ages 1–6 years resulting from

the consumption of walnuts totaling

0.000002 mg/kg-bwt/day. Likewise, the

highest potential chronic exposure to

fluoride was to children ages 1–6 years

with a highest estimated exposure of

0.00004 mg/kg-bwt/day.

i. Food. Food tolerances as inorganic

fluorine compounds exist to support the

uses of Cryolite (insecticide) on various

food and feed commodities in the U.S.

EPA, in the 1996 Cryolite RED

document conservatively estimates that

the ‘‘high-end dietary exposures to

fluoride due to all sources and routes,

(including the fluorination of water and

the potential for fluoride residues

resulting from the uses of Cryolite) are

approximately 0.085 mg/kg-bwt/day.

ii. Drinking water. There is no

anticipated exposure of SF to drinking

water. As a public health tool to aid in

the prevention of dental caries, fluoride

is added to some domestic water

supplies at generally 0.8 to 1.0 ppm.

2. Non-dietary exposure. Sulfuryl

fluoride (as Vikane specialty gas

fumigant) is presently used to fumigate

homes and other structures to control

wood infesting insects. The existing

Vikane use patterns and exposed

populations are not expected to overlap

with the intended post-harvest uses of

ProFume on stored walnuts and raisins.

D. Cumulative Effects

The primary degradation product of

SF is fluoride. The toxicity of fluoride

in various forms has been extensively

reviewed and is used as an additive in

treated water supplies, tooth pastes,

mouth rinses, and other treatments for

the prevention of dental caries. It is also

prescribed in therapeutic amounts for

the treatment of osteoporosis. Fluoride

is naturally present in both food and

water in varying amounts, and has been

added to public water supplies to fight

dental caries. The recommended

concentration of fluoride (usually as

fluorosilicic acid) in treated water

supplies is 0.8 to 1.0 ppm. The Third

Report on Nutrition Monitoring in the

U.S. says that:

Food contributes only small amounts

of fluoride and monitoring the diet for

fluoride intake is not very useful for

current public health concerns. The subpopulation most susceptible to fluoride

is children. For this reason a number of

studies have attempted to quantify the

fluoride intake from a variety of sources.

The total daily intake of fluoride from

water (used to prepare formula, juices,

and other foods) for infants ages birth to

9–months ranged to 1.73 mg with means

from 0.29 to 0.38 mg. Assuming a body

weight of 10 kg, these amounts are

equivalent to 0.03 to 0.04 mg/kg/day.

These levels of dietary exposure in

combination with the potential dietary

exposures that the proposed uses of

ProFume on stored walnuts and raisins

would represent (chronic dietary

exposures of 0.00004 mg/kg-bwt/day)

are considerably lower than the USEPA

MCLG for fluoride of 0.114 mg/kg-bwt/

day.

E. Safety Determination

1. U.S. population. Aggregate risk

from exposure to SF would be minimal

because of its rapid dissipation from any

fumigated commodity and because it is

not expected to be present at the time

of food consumption. The SF residues

in fumigated foods are expected to be

non-detectable at the point of food

consumption. Furthermore, if residues

were considered as high as 2.0 ppm, the

Margin of Exposure to the most

sensitive population (children) is

estimated to be greater than 300,000

(acute) or greater than 1,000,000 for

chronic exposures. Exposure to fluoride,

the residue of interest for SF, can occur

from foods, water, and, dental

treatments. The additional fluoride

residues in raisins fumigated with SF

are indistinguishable from the natural

levels of fluoride already present and

would therefore also fall within the EPA

Threshold of Regulation Policy.

Alternatively, fluoride in walnuts are

expected to contribute to the fluoride

that is ingested, but at a levels far below

other sources, especially treated water

and dentrifices. Chronic exposure to

fluoride in walnuts and raisins (0.00004

mg/kg/day) is much lower than the EPA

MCLG of 0.114 mg/kg-bwt/day

calculated for exposure to fluorinated

water. In addition there is no directly

applicable scientific documentation of

adverse medical effects at levels of

fluorine below 0.23 mg/kg/day.

2. Infants and children. Acute

exposure from a single day consumption

of raisins and walnuts would be

approximately 0.003 mg/kg/day for a

child age 1–6 years. This value is

approximately 10,000 times lower than

the generally accepted toxic dose, and

approximately 2,500 times lower than

the accepted safe dose.

F. International Tolerances

There is no Codex maximum residue

level established for residues of fluoride

on any food or feed crop.

[FR Doc. 01–15150 Filed 6–14–01; 8:45 am]

BILLING CODE 6560–50–S

ENVIRONMENTAL PROTECTION

AGENCY

[FRL–6996–3]

Preliminary Draft Staff Paper for

Particulate Matter

AGENCY: Environmental Protection

Agency (EPA).

ACTION: Notice of a draft for public

review and comment.

SUMMARY: On June 13, 2001, the Office

of Air Quality Planning and Standards

(OAQPS)of EPA will make available for

public review and comment a

preliminary draft document, Review of

the National Ambient Air Quality

Standards for Particulate Matter: Policy

Assessment of Scientific and Technical

Information (Preliminary Draft Staff

Paper). The purpose of the Staff Paper

is to evaluate the policy implications of

the key scientific and technical

information contained in a related EPA

document, Air Quality Criteria for

Particulate Matter, required under

sections 108 and 109 of the Clean Air

Act (CAA) for use in the periodic review

of the national ambient air quality

standards (NAAQS) for particulate

matter (PM). The OAQPS also will make

available for public review and

comment a draft EPA document

entitled, Particulate Matter NAAQS Risk

Analysis Scoping Plan.

DATES: Comments on the preliminary

draft Staff Paper and draft Risk Analysis

Scoping Plan should be submitted on or

before July 12, 2001.

ADDRESSES: Comments on the

preliminary draft Staff Paper should be

submitted to Dr. Mary Ross, Office of

Air Quality Planning and Standards

(MD–15), U.S. Environmental Protection

Agency, Research Triangle Park, NC

27711; e-mail: ross.mary@epa.gov;