\1E0 S?.

)UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

REGION IX

L PRO 75 Hawthorne StreetSan Francisco, CA 94105-3901

NOV 222013

\lr. Lrr C. sri. 1 ijycicir

Air ()afitv Diviso:Arizona L)cpartment of ivirmmeithil Quality1111) \\cst Washinciun Si.

ICHi x. An zona 05 ( )( ) 7

Mr. Dennis Smith. Executive DirectorMaricopa Association ot Governments302 tsorth 1 St Avenue Suite 300Phoenix. Arizona OS! 103

k \ I mdiii ut \ n op C ount )j\ 1-10 Non itt unim lit Ai i

Deer .‘ascv

In ecrurdLince with -lt) (‘.Rk. 03.11 S’( 11(u). ihis leiter transmits our decision that the motor vehicles hudoet (\ I \‘F K) for particulate matter less than 1) microns (PM- 10) in the Fire Perreiii i7un

fur 11/-! (1 fur F’ fuji c ‘ivy (u?u1n AOI1C!llalIli;IC’nI - l rca (.lIm 2012) (Five Percent Plan) is adequate iluire sr rwti. coaGrniiv purposes. tpun the elldctive date of this adequacy determination (15 dassaErn publicati in of our determinatuon in the In:’L’1ul RL’i,f IC;.). the ivlaiieopJ Association of

Governments (f\L\Oi) and ihe I J.S. Department ot 1rinsportation must use the MVEB in the FivePercent Plan in Eiiure eon form itv analyses.1

The Five Percent Plan, which was submitted to the U.S. Environmental Protection Agency on May 25.2012. identilies a PM-lu MIVI/13 for the Muricope County Nonattainncnt Area of 5-UP metric tons perday ftir 2(112. We announced receipt of the Five Percent Plan and the N’IVEB on IEPAs transportationcon Formitv Web site on September 12. 2013 and requested public comment on the MVEB by October15. 2013. We received no comments in resuonse to the adequacy review posting.

in reaching our adequacy deiei’mination. we have delerinined that the M V[IB in the Five Percent Plan.when coiisideieci witi i aI I other cmissions sources in the Marieopa County Nonauainment Area. iseunsisient with he :adequec criteria tound in 41) CFR 03. 11 Si e)(4). We have enclosed a table thaisummarizes our adequacy determination. ‘2re isill SOOfl Post this information on the Internet at:

udrLlnacv.htm.

i’lcase note that an a lequnes review is separate From EP1’’s review of’ the Five Percent Plan. and shouldnot he used to predict EPA s action liar the SI P.

‘1 ode’ s adequacy cleterm HLIL ion dues not supercede I: )\ s action on an earlier I’M- 10 MVEB ol 59.2 metric ions per dcvin eOflflCC!]Ufl with our apnrovLn ci the Serious Area Plan liar PM-I 0. which was final ited i cdv 25. 2002. 67 FR 4S7 1 . As apractical metier, how ever. the i 1VLU in the Five Perceni Plan will he controlling because ills a lower \‘alue.

Printed on Recycled Paper

if von have any questions regarding this decision, please contact Colleen ivI faughan n (520) 5—O I Sor Greg Nudcl at (415) 947-4107.

Sincerely.

LcThorah JordanDirector. Air Division

l-nc1osure

cc: Lindy Bauer, i\’Iaricopa ,i\ssociation of GovernmentsDean Giles. Maricopa Association of GovernmentsBeverly Chenauskv. Arizona Department of TransportationEd Stillings. Federal 1—ligh\vay Admimstration

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ared

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ew

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on

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ack

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stra

ting

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vern

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als

oin

form

ati

on

:in

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dem

on

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tin

gth

at

the

Mari

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of

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ern

men

ts

(MA

GI

was

the

appro

pri

ate

agenc

tode

cla

pth

ep

lan

for

the

are

as

of

Mari

copa

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wit

hin

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1—10

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a.

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hel

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l12

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Docum

enta

tion

of

this

heari

ng

may

be

fou

nd

inA

pp

endix

Eof

the

sub

mit

ted

pla

n.

Sec

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(e04)(

ii)

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pla

nw

asd

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ed

lth

rough

YD

uri

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the

develo

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ent

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the

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appro

ach

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contr

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measu

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consu

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wit

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and

were

dis

cu

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and

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inate

din

meeti

ngs

of

the

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dat

an

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he

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art

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t

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of

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on,

and

loca

lg

overn

ments

such

asM

ari

copa

County

.P

hoenix

.

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aan

dsm

all

er

cit

ies.

Sec

.03

.11 S

(eH

-I)(

iii)

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em

oto

rvehic

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issi

on

YC

hap

ter

6o

fth

ep

lan

cle

arl

yq

uan

tifi

es

and

identi

fies

the

moto

rvehic

leem

issi

ons

budget

)s)

iscle

ark

iden

tifi

ed

and

budget

(pp

6-1

2th

rough

6-4

3).

\iA

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dM

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ES

201

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tocalc

ula

teP

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cis

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qu

an

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on

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omexhaust

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rean

dbra

ke

wea

r.T

hey

use

dth

eJanuar

2011

vers

ion

of

AP

-42’s

appro

pri

ate

meth

ods

tocalc

ula

tere

—en

trai

ned

du

stem

issi

on

sfr

ompaved

road

san

dd

ust

em

issi

on

sfr

onm

unpa

ved

road

s.

Sec

.93

.11S

(et(

4)(

iv)

Ihe

moto

rvehic

leem

issi

ons

VE

PA

has

dete

rmin

ed

that

the

MV

EB

,w

hen

co

nsi

dere

dto

geth

er

with

all

oth

er

budget(

s),

when

consi

dere

dto

geth

er

em

issi

on

sourc

es,

are

consi

sten

tw

ith

req

uir

em

en

tto

dem

on

stra

tefi

ve

perc

ent

with

all

oth

er

em

issi

on

sourc

es.

isre

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ons

unti

latt

ain

men

t,re

aso

nable

furt

herprogt’

an

datt

ain

men

to

fth

ePM

—

co

nsi

sten

tw

ith

appli

cable

10st

andard

.(S

eeC

hapte

rs4.

5an

d6

of

the

pla

n)

req

uir

em

en

tsfo

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aso

nable

furt

her

pro

gre

ss,

att

ain

men

t,o

rm

ain

ten

an

ce

(whic

hever

isre

lev

an

tto

the

give

np

lan

).

Sec.

93.1

18(e

)(4)

(v)

The

plan

show

sa

clea

rre

lati

onsh

ipY

The

on—

road

cont

rol

mea

sure

sin

clu

de

the

use

ofPM

—10

cert

ifie

dst

reet

swee

pers

.am

ong

the

emis

sion

sbu

dget

(s).

pavi

ngan

dst

abili

zing

unpa

ved

road

san

dal

ley

and

shou

lder

s,re

duce

dsp

eed

cont

rol

mea

sure

san

dth

eto

tal

limits

and

over

layi

nghi

ghw

ays

with

rubb

eriz

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t.T

hese

wer

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plem

ente

dem

issi

ons

inve

ntor

y,as

adva

nced

cont

inge

ncy

mea

sure

san

dth

ere

duct

ions

wer

eno

tco

nsid

ered

inde

mon

stra

ting

50

0re

duct

ions

.R

FPor

atta

inm

ent,

but

thes

eco

ntro

lsar

eas

sum

edin

the

calc

ulat

ion

ofth

eM

VE

B.

(Cha

pter

4)

The

rew

ere

som

ean

cill

ary

bene

fits

toth

eon

-roa

dem

issi

ons

due

toin

crea

sed

com

plia

nce

with

\iar

icopa

coun

ts’

rule

sfo

rst

abil

izin

gPr

ivat

eunp

aed

road

san

dal

leys

.T

hese

bene

fits

wer

ein

clud

edin

the

emis

sion

sin

vent

ory

for

the

50

redu

ctio

ns.

RFP

and

atta

inm

ent

dem

onst

rati

ons

and

inth

eM

VE

Bs.

(Cha

pter

s5

and

6)Se

c.93

.1l8

(e)(

4)(

i)R

evis

ions

topr

evio

usly

subm

itte

dY

The

pre

vio

us

MV

EB

unde

rth

eap

prov

edS

erio

usA

rea

Plan

for

PM-b

was

59.7

cont

rol

stra

tegy

orm

aint

enan

cepl

ans

met

ric

tons

per

daof

PM—

10.

The

budg

etin

this

plan

is54

.9.

hic

his

low

erdu

eex

plai

nan

ddo

cum

ent

any

chan

ges

toto

chan

ges

inm

etho

dolo

gy,

impr

ovem

ents

inru

leco

mpl

ianc

ean

dre

duct

ions

clue

any

prev

ious

subm

itte

dbu

dget

san

dto

pavi

ngo

fro

ads,

all

es

and

shou

lder

san

dfr

omim

prov

edst

reet

swee

pers

.co

ntro

lm

easu

res:

impa

cts

onpo

int

84.6

90of

the

on-r

oad

emis

sion

sar

efr

omre

—en

trai

ned

dust

and

dust

from

unpa

ved

and

area

sour

ceem

issi

ons:

anro

ads

and

alle

ys.

The

seem

issi

ons

are

calc

ulat

edus

ing

met

hods

from

AP

-42.

EPA

chan

ges

toes

tabl

ishe

dsa

fety

marg

ins

has

revi

ewed

the

AP—

12m

etho

d,re

sult

ing

ina

mor

eac

cura

te.

bLit

low

eres

tim

ate

(see

93.

101

for

defi

niti

on),

and

ofem

issi

ons

for

the

Mar

icop

aC

ount

\PM

—10

Non

atta

inm

ent

Are

a.T

his

reas

ons

for

the

chan

ges

(inc

ludi

ngca

lcul

atio

nis

disc

usse

don

inC

hapt

er5

oft

he

2008

\lar

icopa

Cou

nty

Em

issi

ons

the

basi

sfo

ran

chan

ges

toem

issi

onIn

vent

ory

vhi

chis

incl

uded

asA

ppen

dix

Ao

fth

epl

an.A

sare

sult

ofth

ese

fact

ors

ores

tim

ates

of

VM

T.

chan

ges.

the

asm

alle

rem

issi

ons

budg

etis

appr

opri

ate

for

the

area

.e

enth

ough

vehi

cIc

mil

estr

avel

edis

incr

easi

ng.

The

othe

rre

quir

edre

duct

ions

for

the

dem

onst

rati

ons

inth

epl

anw

ere

mad

eb

impr

ovin

gco

mpl

ianc

ew

ithdu

stco

ntro

lre

gula

tion

sfo

rco

nstr

ucti

onpr

ojec

tsan

dun

deve

lope

dla

nds.

The

area

isal

som

akin

ggo

odpr

ogre

ssre

dtic

ing

road

—re

late

dem

issi

ons

byim

prov

edst

reet

swee

ping

and

apr

ogra

mto

pave

orst

abil

ize

road

s.al

leys

and

shou

lder

s.Se

c.93

.11S

(e)(

5)E

PAha

sre

iew

edth

eS

tate

’sY

MA

Gac

cept

edan

dre

spon

ded

tove

rbal

and

wri

tten

publ

icco

mm

ents

onth

epl

anco

mpi

lati

onof

publ

icco

mm

ents

and

aspa

rtof

thei

rpu

blic

hear

ing

proc

ess

docu

men

ted

inA

ppen

dix

Eof

the

plan

.re

spon

seto

com

men

tsth

atar

eM

AG

addr

esse

dal

lpu

blic

com

men

tsin

deta

ilan

dsu

bmit

ted

both

the

com

men

tsre

quir

edto

besu

bm

itte

dw

ithan

yan

dth

eir

resp

onse

sas

part

of

Ap

pen

dix

E.E

PA

has

revie

wed

thes

eco

mm

ents

and

impl

emen

tati

onpl

an.

resp

onse

san

dha

sco

nsid

ered

them

inou

rfi

ndin

gth

atth

eM

VE

Bs

are

adeq

uate

.