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Da t e : 2 / 1 / 2011 5 : 20 PM

S u b j ec t: Re : S e c on d a r y Lea d Sm el t e rs

- R T R

- F ugi t i v e lead e m i ss ion s and I CR r e s pon s es

Dea r Mr

. Ri c ha r d Lei b y.

T h e r e w a s an e rr o r in t h e p r e v i ou s e m ai l s t ha t I s en t y ou ea r li er

t oda y

. P lea s e igno r e / dele t e t ho s e e m a il s a n d r e f e r t o t hi s one in s t ead,

a s f o l low s:

T h an k y ou f o r t he in f o rm a t ion and da t a t ha t y ou s u b m i t t ed t o u s in

r e s pon s e t o t he in f o rm a t ion c olle c t ion r eque s t l e t t e rs t ha t we s e n t y ou

in J une and J ul y o f 2010

. T he da t a and in f o r m a t io n a r e v e ry help f ul f or

ou r r i sk a n d t e c hno l og y r e v i e w o f t h e S e c onda ry Lead Sm el t i ng s o u r ce

c a t ego ry

. W e ha v e been u s ing m u c h o f t he da t a a n d i n f o rm a t ion in our

ana l y s e s a s y o u r ep o r t ed.

Howe v e r

, wi t h r ega r d t o t h e e s t i m a t e s o f f u gi t i v e l e ad e m i s s i o n s,

be c au s e o f c o m pl e x i t ie s o f e s t i m a t ing t h e s e e m i ss ion s

, t h e da t a gap s and

in c o m ple t e in f o rm a t ion

, a n d v a r i o u s un c e r t ain t ie s

, we d e t e rm in e d t ha t it

wa s app r op r ia t e t o g a t h e r ad d i t i onal in f o rm a t i on a nd c o n du ct

s uppl e m e n t a l an a l y s e s t o c a l c u la t e r e v i s ed e s t i m a t e s o f f u g i t i ve

e m i ss ion s f o r s o m e o f

t he f a c i l i t i e s.

As y ou k now

, i n t he s e c t i on 1 14 s u rv e y

, we r e q ue s t e d i n f o rm a t ion

f o r s t a ck a nd f ug i t i v e e m i ss ion s f r o m t he S e c ond a r y Lea d Sm el t ing

f a c ili t ie s

. W e a r e now in t he p r o c e s s o f c on d u c t i n g d i s p e r s i on m o d eling

o f t he e m i ss ion e s t i m a t e s

. I n s o m e in s t an c e s

, we ha v e f o und a

di scr epan cy be t ween t h e r e s u l t s o f t he di s pe rs ion m odel and t he v a lues

r e c o r ded a t lo c al a m bien t m on i t o rs whi c h c anno t b e a cc ou n t ed f o r b y t he

s t a c k and f ugi t i v e e m i s s i o n s r ep o r t ed

. EPA a ss u m e s t he s t a c k e m i ss ions

a r e r elia b le a s t he y a r e b a s ed o n a c t ual t e s t da t a

, a nd t he p r i m a ry

c au s e o f t he di scr epan cy i s du e t o r elea s e s o f f ugi t i v e e m i s s i on s

. In

y ou r s u r v e y

, y ou did no t p r o v i d e a n e s t i m a t e f o r f u gi t i v e e m i ss io ns

( e

. g

. , r oadwa y f ugi t i v e s

, f ugi t i v e s f r o m s t o r age pi l e s o r s lag hand l ing

o r f u gi t i v e s whi c h e sc ape f r o m bu i lding s).

T h e r e f o r e

, we ha v e de r i v ed an e s t i m a t e o f f ugi t i v e e m i ss ion s f or

y ou r f a c i li t y ba s ed upo n a r e v iew o f t he I CR r e s po n s e s and ind u s t ry

p r a c t i c e s a n d c a l c u l a t i on m e t hod o logie s

. W e h a v e t a k en in t o a c c o u n t t he

s i z e o f t he f a c i l i t y

, t h e de g r ee t o whi c h f a c i li t ie s a r e c on t ain ed

wi t hin en c lo s u r e s

, and t he r epo r t ed wo rk p r a c t i c e s de scr ibed in y our

s u rv e y

. M o r eo v e r

, we anal yz ed a v ail a ble a m bien t m on i t o r i ng d a t a ne ar

t he f a c i l i t y in r ela t ion t o i ni t ial m o deling e s t i m a t e s.

T h e d r a f t e s t i m a t e s we h a v e c al c ul a t e d f o r y o u r f a c ili t y and t he

o r ig i nal e s t i m a t e y ou p r o v ided in t h e s u rv e y a r e p r o v ided a s f ol l ow s:E a s t P enn

, PA:

1

. T he e s t i m a t e o f

f ugi t i v e lead e m i ss ion s p r o v ided in y ou r s u rv ey

r e s pon s e = No e s t i m a t e p r o v ide d in s u rv e y.

2

. T he EPA d r a ft e s t i m a t e o f t o t al f ug i t i v e e m i ss ion s o f le a d f o r t h is

f a c ili t y = 0

. 33 t on s p e r y ea r.

W i t h t hi s e m a il we a r e p r o v i d ing y o u a n o p po r t u ni t y t o c o mm en t on

ou r r e v i s ed d r a f t e s t i m a t e s

, p r o v ide c al c ula t ion s and do c u m en t a t i on to

s uppo r t y o u r o r i ginal e s t i m a t e s

, o r p r o v i de al t e r na t i v e e s t i m a t e s t hat

y ou belie v e a r e m o r e a c c u r a t e

. If y o u s ugg e s t al t e r na t i v e e s t i m a t e s,

ple a s e p r o v i d e c o m ple t e do c u m en t a t ion and e x plana t ion o f t he ba s i s of

s u c h al t e r na t i v e s

. I f y o u wo u ld l i k e t o c o m m e n t o r p r o v ide addi t io n al

in f o rm a t ion o r a l t e r na t i v e e s t i m a t e s

, plea s e s end a r e s pon s e t o t his

e m ail b y F eb r u a r y 8 t h

, 2 0 11.

T h an k Y ou.

Chu ck F r en c h

, E n v i r on m en t al S c i en t i s t,

U

. S

. EPA

, O ff i c e o f A i r Q ual i t y P l anning and S t a nda r d s,

S e c t o r P oli c ie s and Pr og r a m D i v i s i on

P h one : 919

- 54 1

- 7912