### U

. S

. En v i r o n m e n t a l P r o t ec t

i o n Ag en c y, R e g

ion 9

P ub l i c I n f

o r m a t i o n Sh e e t

Pr o p o s e d C l e a n A i r A c t P e r m i t

F o u r C o r ne r s P o w e r P l a n t

S u mm a r y o f th e P r o p o s e d P e rm i t

On J ul y 24, 2014, t h e U ni t e d S t a t e s E nvi r onm e n t a l Pr o t ec t ion Age n cy (

E P A ) R eg ion 9 p r ovid e d no t

i ce o f

,

a nd r e qu e s t e d publi c c o m m e n t on, a p r opo s e d p e r mi t t h a t w ould g r a n t c on d i t ion a l a pp r ov a l, in acc o r d a n ce

w i t h t h e Pr e v e n t

ion o f Si g ni f i ca n t D e t e r io r a t ion (P SD ) r eg ul a t

ion s ( 40 C F R 5 2.21 )

, t o t h e A r i z on a P ub l

i c

S e r vi ce C om p a n y (

A P S ) t o c on s tr u c t a nd op e r a t e s e l ec t iv e ca t a l y t i c r e du c t ion ( S CR ) s y s t e m s f

o r c on tr o l lin g

e mi ss ion s o f

ni t r o ge n o x id e s (

NO X )

, a s we ll a s o t h e r a n c ill a r y e quip m e n t (t h e Pr oj ec t) t o t h e F ou r C o r n e r s

P o we r P l a n t (F C PP)

. T h e publi c c omm e n t p e r iod f o r t hi s p r op o s e d p e r mi t w ill c lo s e on S e p t e mb e r

24,

2014.

A P S c o

- o w n s a nd op e r a t e s t h e F C PP

. T h e F C PP i s a c o a l -f i r e d po we r

pl a n t

, u t ili z in g pulv e r i z e d c o a lboil e r s , lo ca t e d on t h e N a

v a jo N a t ion a bou t 25 mi l e s we s t

o f F a r min g t on, N e w M ex i c o. T h e F C PP

c u rr e n tl y c on s i s t s o f t

w o 750 m eg a

wa tt (M W ) c o a l

- f i r e d e l ec tr i c s t ea m

- ge n e r a t

in g uni t s ( E G U s )

, w

i t h a t o t a l

ca p a c i t y o f a pp r o x im a t e l y 1,500 M W

, a nd o t h e r a n c i ll a r y e quipm e n t s u c h a s c o a l s t o r a ge , lim e h a ndli n g

op e r a t ion s a nd d r y a s h h a ndlin g

op e r a t ion s

. Pr e viou s l y

, t h e F C PP c on s i s t e d o f f iv e c o a l -f i r e d E G U s

. I n

2012, E P A p r omul g a t e d a s ou r ce

- s p ec i f i c F e d e r a l I mpl e m e n t a t

ion P l a n (F IP ) r e qui r

in g t h e F C PP t o ac hi e v e

e mi ss ion r e du c t

ion s r e qu i r e d b y t h e C A A ’ s b e s t a v ail a bl e r e tr o f i t t ec hnolo gy (

B A R T ) r e qui r e m e n t s

. A P S

no t i f i e d E P A t h a t a s p a rt

o f t h e c ompli a n ce s tr a t eg y f o r t h e B A R

T F I P i t w ould p e r m a n e n tl y s hu t do w n

t h r ee ex i s t in g E G U s – U ni t s 1, 2, a nd 3. A s o f J a nu a r y 2014, t h e F C PP no w c on s i s t s o f t h e t w o r e m a inin g

750 M W E G U s – U ni t s 4 a nd 5 – a nd t h e e x i s t in g a n c ill a r y e quip m e n t

. A P S w ill f u rt h e r c ompl y w

i t h th e

r e qui r e m e n t s o f E P A ’ s B A R T FIP b y in s t a llin g S C R on U ni t s 4 a nd 5 t o r e du ce e mi ss ion s o f ni tr o ge n

o x id e s ( NO X ) b y a pp r o x i m a t e l y

80 % fr om c u rr e n t

l e v e l s

. T h e in s t a ll a t

ion o f S CR t o c omp l

y w i t h E P A ’ s

B A R T FIP i s ca u s in g a s i g ni f

i ca n t n e t e mi ss ion in c r ea s e o f s ul f u r i c ac id mi s t ( S A M)

, w hi c h i s t h e r ea s on t hi s

Pr oj ec t mu s t ob t a in a P SD p e r mi t fr om E P A R eg ion 9. B eca u s e t h e Pr oj ec t ca u s e s a s i g ni f i ca n t n e t

e mi ss ion s in c r ea s e onl y f

o r S A M e mi ss ion s , S A M i s t h e onl y pollu t a n t s ubj ec t t o P SD r e vi ew f o r t h e

Pr oj ec t

.

T hi s do c um e n t

i s in t e nd e d t o p r ovid e a b r i e f , in f o r m a l s umm a r y

o f in f o r m a t i on t o a ss i s t

m e mb e r s o f t h e publi c a tt e ndin g t h e publ i c h ea r in g s s c h e dul e d f

o r A u g u s t 27 a nd 28, 2014 f

o r E P A ’ s p r opo s e d p e r mi t f o r

t h e Pr oj ec t

. F o r

mo r e d e t a il s a bou t t h e p e r mi t r e qui r e m e n t s

, r e f e r t o E P A ’ s p ubli c no t

i ce

, t h e p r opo s e d

p e r mi t

, a nd t h e F ac t

Sh ee t f o r t hi s p r opo s e d p e r mi t ac t ion, w hi c h a r e a v a il a b l e on t h e E P A R e g ion 9 p e r mi t

we b s i t e : h tt p:// ww

w

. e p a

. g ov/ r eg

ion9/ a i r /p e r mi t / r 9

- p e r mi t s

- i s s u e d.h t ml

. T h e a dmini s tr a t iv e r ec o r d f

o r t h e

p r opo s e d p e r mi t

m ay b e vi ewe d in p e r s on a t t h e E P A R eg ion 9 o ff i c e in S a n Fr a n c i s c o, Ca li f o r ni a ; f o r mo r e

in f o r m a t ion, o r t o ob t a in c opi e s o f r e l e v a n t do c um e n t s , pl ea s e c on t ac t L i s a B ec kh a m a t ( 415 ) 972

- 38 1 1 o r

vi a e m a il a t R 9 A i rP e r mi t s @e p a

. g ov

. L i s a B ec kh a m ca n a l s o b e r e a c h e d t h r ou g h E P A R e g ion 9’ s t oll -fr ee

ge n e r a l in f

o r m a t ion lin e a t ( 866 ) 372

- 9378

.

W h a t L a ws a nd R e gu la t io n s A pp ly t o E P A ’ s Pr o p o s e d P e rm i t ?

W e p r e p a r e d t h e p r opo s e d p e r mi t b a s e d on ou r P S D r eg ul a t ion s i ss u e d und e r t h e C l ea n A i r A c t a t 40 C od e

o f F e d e r a l R eg u l a t

ion s ( C F R ) 52.21 a nd ou r M ino r

N ew Sou r ce R e vi e w (

N S R ) r eg ul a t ion s f o r I ndi a n

C oun tr y a t

40 C F R 49.15 1

- 161. W e b e l i e v e t h a t t h e p r opo s e d Pr oj ec t w ill c ompl y w

i t h P SD a nd M ino r

NS R

r e qui r e m e n t s , in c ludin g t h e in s t a ll a t ion a nd op e r a t

i o n o f B e s t A v a il a bl e C on t r ol T ec hnolo gy ( B A C T ) f o r

S A M e mi ss ion s

. W e m a d e t hi s d e t e r min a t ion b a s e d on t h e in f

o r m a t ion s uppl i e d b y t h e a ppl i ca n t , ou r r e vi ew

o f t h e a n a l y s e s c on t a in e d i n t h e p e r mi t a ppli ca t ion, a nd o t h e r r e l e v a n t

in f o r m a t ion c on t a in e d in t h eP a ge 2 o f 3

a dmini s tr a t

iv e r ec o r d f

o r t hi s p r opo s e d ac t

ion. E P A h a s p r ovid e d t h e p r opo s e d p e r mi t a nd F ac t Sh ee t t o

t h e publi c f

o r r e vi ew

, a nd w

ill m a k e a f

in a l d e c i s ion on t h e Pr oj ec t ’ s p e r mi t a ppli ca t ion a ft e r c on s id e r

in g a ll

publi c c omm e n t s s ubmi t t e d du r in g t h e publi c c o m m e n t

p e r iod.

E nvi r onm e n t a l r e qui r e m e n t s fr om o t h e r f e d e r a l, tr ib a l, o r lo ca l l aw s a r e no t i n c lud e d in E P A ’ s p r opo s e d

p e r mi t unl e ss t h ey a r e a l s o p a rt

o f t h e C l ea n A i r A c t P SD p r o g r a m o r M in o r N S R p r o g r a m f

o r I ndi a n

C oun tr y . Ho we v e r

, t h e P r oj ec t i s r e qui r e d t o c ompl y w

i t h a ll o t h e r e nvi r onm e n t a l r e qui r e m e n t s

.

W h a t Doe s E P A ’ s Pr o p o s e d P e rm i t R e gu l a t e ?

T h e P SD p r o g r a m ( 40 C F R 52.21 ) a ppl i e s t o “ m a jo r ” n ew s ou r ce s a nd “ m a jo r ” modi f i ca t ion s a t ex i s t

in g

m a jo r s ou r ce s o f a tt a inm e n t pollu t a n t s

. B a s e d on p o t e n t i a l e mi ss ion s fr om t h e F C PP , i t i s c on s id e r e d a n

ex i s t in g m a jo r s ou r ce

. T hi s Pr oj ec t mu s t c ompl y w

i t h t h e P SD p r o g r a m i f

i t m ee t s t h e d e f

ini t ion o f a m a jo r

modi f i ca t ion. T h e P SD p r o g r a m w

ill a ppl y f o r e ac h pollu t a n t t h a t r e s ul t s in a s i g ni f i ca n c e n e t e mi ss ion s

in c r ea s e

.

I n acc o r d a n ce w

i t h 40 C F R

52.21 ( j )

, a m a jo r

modi f i ca t ion i s r e qui r e d t o a ppl y

b e s t a v a il a b l e c on tr ol

t ec hnolo gy (

B A C T ) f o r e a c h P SD pollu t a n t t h a t w o uld r e s ul t in a s i g ni f i ca n t n e t e mi ss ion s in c r ea s e

. T h i s

r e qui r e m e n t a ppli e s t o ea c h p r opo s e d e mi ss io n s uni t a t w hi c h a n e t e mi ss ion s in c r ea s e in t h e pollu t a n t

w ould o cc u r

. W

i t h r e s p ec t t o t h e Pr oj ec t , in c r ea s e s o f S A M ca u s e a s i g ni f

i ca n t n e t e mi ss ion s in c r ea s e

, a nd

t h e r e f o r e t h e p r opo s e d p e r mi t r e qui r e s t h e Pr oj ec t t o a ppl y B A C T f o r S A M e mi ss ion s t o a ll e quipm e n t t h a t

i s b e in g modi f i e d a s p a rt o f t h e Pr oj ec t

.

F o r a n y pollu t a n t no t s ubj ec t t o t h e P SD p r o g r a m, t h e Pr oj ec t mu s t a l s o c ompl y w

i t h t h e M ino r

NS R

Pr o g r a m in I ndi a n C oun t r y f o r eac h pollu t a n t t h a t r e s ul t s in a n e t e mi ss ion s i n c r ea s e a bov e t h e M ino r NS R

t h r e s hold s

. T h e M ino r

N S R t h r e s hold s a r e lo we r t h a n t h e t h r e s hold s f o r t h e P SD p r o g r a m. W

i t h r e s p ec t t o

t h e Pr oj ec t

, t h e r e a r e no p ollu t a n t s t h a t ca u s e a n e t e mi ss ion s in c r ea s e ( o t h e r t h a n S A M e mi ss ion s

, w hi c h

a r e a l r ea d y s ubj ec t t o t h e P SD p r o g r a m ) . Ho we v e r

, t h e r e a r e in c r ea s e s in a ll o wa bl e e mi ss ion s o f p a rt i c ul a t e

m a tt e r (PM)

, PM 10 a nd PM 2 .5 t h a t t h e M ino r NS R Pr o g r a m r e qui r e s t o b e i n c lud e d in a n N S R p e r mi t

. Ou r

p r opo s e d p e r mi t

in c lud e s t h e s e r e qui r e m e n t s

.

H o w W o u l d E P A ’ s Pr o p o s e d P e rm i t A ff ec t A i r Qu ali t y ?

T h e P SD r eg ul a t

ion s r e qui r e a n exa mi n a t

ion o f t h e imp ac t s o f t h e p r opo s e d P r oj ec t on a mbi e n t a i r

qu a l i t y

f o r t h e pollu t a n t s r eg ul a t e d und e r t h e P SD p e r mi t . Ho we v e r

, t h e pollu t a n t r e g ul a t e d und e r t h e P SD p e r mi t

– S A M – do e s no t

h a v e a N a t

ion a l A mbi e n t A i r

Q u a li t y S t a nd a r d. B a s e d on t

h e t ec hni c a l in f

o r m a t ion t h a t

we h a v e r e vi e w e d t o d a t e

, t h e Pr oj ec t ’ s imp ac t s on a i r qu a li t y a nd vi s ibili t

y a r e c on s i s t e n t w

i t h limi t s a llo we d

und e r t h e C l ea n A i r Ac t

.

T h e P SD r eg ul a t

ion s r e qui r e t h a t E P A e v a l u a t e o t h e r po t e n t i a l imp ac t s on 1 ) s oil s a nd v ege t a t ion; 2 )

vi s ibili t y imp a i r m e n t ; a nd 3 ) g r o w t h. B a s e d on ou r r e vi ew o f t h e a n a l y s e s p r ovid e d b y t h e a ppl i ca n t a nd t h e

m a x imum po t e n t

i a l c on ce n tr a t

ion s o f t h e vi s ibili t

y

- r e l a t e d c r

i t e r i a po l lu t a n t s

-- NO 2 , S AM 5

-- we do no t

ex p ec t a n y a d v e r s e imp ac t s on vi s ibili t y , no r do we ex p ec t t hi s p r oj ec t t o r e s ul t in a n y a d v e r s e imp ac t s on pl a n t s a nd s oil s o r s i g ni f

i ca n t g r o w t h. T h e pu r po s e o f t hi s P r oj ec t i s t o r e du ce NO X e mi s s ion s f r om t h e

F C PP t o imp r ov e vi s ibili t

y a t 16 n a t ion a l p a r k s a nd w

ild e r n e ss a r ea s n ea r t h e F C PP

.

W h a t Oth e r A c t io n s i s E P A T aki ngi n C o nn ec t io n w i th I t s Deci s io n m aki ng P r oce ss?

E P A e n g a ge d in c on s ul t a t ion w i t h t h e U .S. F i s h a n d W

ildli f e S e r v i ce ( S e r vi c e ) und e r s ec t

ion 7 o f t h e l

E nd a n ge r e d S p ec i e s A c t ( E S A ) t o e n s u r e t h e p r opo s e d p e r mi t d ec i s ion f

o r t h e Pr oj ec t

i s no t lik e l y t oP a ge 3 o f 3

j e op a r di ze t h e c on t

inu e d ex i s t e n ce o f a n y f

e d e r a ll y

- li s t e d e nd a n ge r e d o r t h r e a t e n e d s p ec i e s o r r e s ul t in t h e

d e s tr u c t ion o r a dv e r s e m o di f

i ca t ion o f c r i t i ca l h a bi t a t f

o r s u c h s p ec i e s

. E P A h a s r ece iv e d c o n c u rr e n ce fr om

t h e S e r vi ce t h a t t h e Pr oj ec t c ompli e s w i t h t h e E S A r e qui r e m e n t s

.

I n a ddi t ion, E P A mu s t c on s ul t w

i t h t h e N a v a jo N a t

ion T r ib a l Hi s t o r

i c Pr e s e r v a t

ion O ff i ce r ( T H P O ) t o

c ompl y w i t h s ec t ion 106 o f t h e N a t

ion a l Hi s t o r

i c P r e s e r v a t ion Ac t ( NH P A ) a nd c on s id e r t h e e ff

ec t s t hi s

ac t ion w ill h a v e on hi s t o r

i c s i t e s a nd c ul t u r a l r e s ou r ce s li s t e d in o r e li g ibl e f o r t h e N a t ion a l R eg i s t e r o f

Hi s t o r i c P l ace s

. E P A p r e p a r e d a d r a ft C ul t u r a l R e s ou r ce s R e po rt f o r t hi s ac t ion, w hi c h i s a v a i l a bl e t o t h e publi c a s p a rt

o f t h e a dmini s tr a t

iv e r ec o r d f

o r t hi s a c t ion. E P A a l s o invi t e d o t

h e r tr ib e s

, T H P O s a nd s t a t e

hi s t o r i c p r e s e r v a t ion o ff i c e r s t o c on s ul t w

i t h E P A in t hi s p r o ce ss

. A n y in t e r e s t e d p a rt

y i s we l c om e t o b r

in g

p a rt i c ul a r c on ce r n s o r

in f o r m a t ion t o ou r a tt e n t

ion r ega r din g t hi s p r oj ec t ’ s po t e n t i a l e ff ec t on hi s t o r i c

p r op e rt i e s

. E P A w

ill c on s ul t w

i t h a n y tr ib e s r e qu e s t

in g t o join c on s ul t a t

ion a n d r e vi ew a n y c omm e n t s

r ece iv e d p r

io r t o s ee kin g c on c u rr e n ce fr om t h e N a v a jo N a t ion T H P O.

F in a ll y , in a cc o r d a n c e w

i th E xec u t

i v e O r d e r 12898

, “ F e d e r a l Ac t

ion s t o A dd r e ss E nvi r onm e n t a l J u s t i ce in

M ino r i t y P opul a t ion s a nd L o w -I n c om e P opul a t ion s

, ” E P A d e t e r min e d t h a t i t w ould b e a pp r op r

i a t e t o

p r e p a r e a n a n a l

y s i s t o c on s id e r e nvi r onm e n t a l ju s t i ce i ss u e s in c onn ec t

ion w i t h t h e i ss u a n ce o f t hi s f

e d e r a l

p e r mi t

. I n ou r E nvi r onm e n t a l J u s t i ce A n a l y s i s

, we c on c lud e t h a t t h e e mi ss ion s o f S A M a ss o c i a t e d w

i t h t hi s

Pr oj ec t a nd r eg ul a t e d un d e r E P A ’ s p r opo s e d p e r mi t w ill no t r e s ul t

in a dv e r s e hum a n h ea l t h imp a c t s t o a n y popul a t ion, a nd t h a t t h e r e w

ill no t b e di s p r opo rt

io n a t e l y hi g h a nd a dv e r s e h u m a n h ea l t h o r e nvi r onm e n t a l

e ff ec t s w i t h r e s p ec t t o t hi s a i r

pollu t a n t on mino r i t y o r lo w

- in c om e popul a t

io n s r e s idin g

n ea r t h e p r opo s e d

Pr oj ec t o r t h e c ommuni t

y a s a w hol e

. I n a ddi t

ion, w e d e t e r min e d t h a t w e s hould p r ovid e E n g li s h

- Din é

tr a n s l a t ion s e r vi ce s a t bo t h publi c h ea r

in g s

. T h e E n

vi r onm e n t a l J u s t

i ce A n a l y s i s i s a v a il a bl e t o t h e publ i c a s

p a rt o f t h e a dmini s tr a t

iv e r ec o r d s uppo rt

in g E P A ’ s p r opo s e d p e r mi t f o r t h e P r oj ec t

.