A p r il 26 2012 e m a il fr o m Tu ye t- l e P ha m ( SCA QM D ) t o La W eeda W a r d ( EPA) N an cyLe v i n to: Nan cy Le v in 01 / 03 / 2013 02 : 56 PM

----- Fo rw a r ded b y N an cy Le v i n /R 9 /USEPA/US on 01 / 03 / 2013 02 : 54 P M -----

----- Fo rw a r ded b y LaWeeda Wa r d /R 9 /USEPA/US on 11 / 26 / 2012 02 : 56 P M -----

F r o m: Tu y e t-l e P ha m <T P ha m @ aq m d

. go v> To: LaWeeda Wa r d /R 9 /USEPA/US@EPA C c: T r a cy G o ss <T G o ss @ aq m d

. go v> D a t e: 04 / 26 / 2012 08 : 49 AM S ubj e c t: R u l e 1127 - Pr e v i ou s I n v en t o ry M e t hodo l ogy

L aW ee d a:

W e i n cl ud e d VOC, a mmo n ia, a nd PM10 i n o u r o ri g i n al R u l e 1127 b as e li n e i n v e n t o r y; h o we v e r, we d i d

n o t clai m PM10 e m issi o n s r e du c t i o n i n t h e SI P s ub m i tt al as i t w as n o t a c omm i t m e n t i n t h e 2003 A Q MP

. T h e m ai n r e as o n , I b e li e v e , w as b e ca u s e VOC a nd a mmo n ia e m issi o n fac t o rs we r e b as e d o n m a nu r e
p r o du c t i o n a nd t h e ir e m issi o n s r e du c t i o n s we r e b as e d o n m a nu r e r e mov al w h il e i t w as n o t t h e cas e f o r PM10.

T h e ass u m p t i o n s a nd m et h o d o l o g y f o r R u l e 1127 e m issi o n s i n v e n t o r y a nd r e du c t i o n s ca n b e f o und i n
t h e a tt ac h e d fil e ( w h ic h is a n e xc e r p t fr om t h e 2004 S t aff R e p o r t ), bu t h e r e is a s u mm ar y:

A c t ivi ty

· A c t u al h e a d c o un t s fr om 1993 t h r o ugh 2002 ( 514

, 000 i n 1993 a nd 394

, 000 i n 2002)

· A ss u m p t i o n o f

2% d e cr e as e i n c o w s p e r ye ar fr om 2002 t h r o ugh 2010 ( b as e d o n d a t a
p r ov i d e d b y t h e M ilk P r o du c e r’s C o un cil, w h ic h i nd ica te d t h e d e cli n e r e s u l t i ng fr om far m sal e s t o

r e si d e n t ial d e v e l o p e rs)

Amm on ia
E m issi o n fac t o r o f

51 l b s / h e a d /y r w as u s e d. T h is fac t o r w as c o n v e r te d t o 0

. 005 t o n NH

3 / t o n m a nu r e (ass u m i ng 5

. 25 t o n s o f m a nu r e p e r ye ar f o r e ac h m ilki ng c o w )

. T h e c o n v e rsi o n w as n e c e ssar y t o

e s t i m a te t h e e m issi o n s r e du c t i o n t h a t w as b as e d o n t h e fa te o f m a nu r e

. P l e as e n o te t h a t t h e

c o n v e rsi o n s we r e d iff e r e n t f o r h e if e rs a nd cal v e s (ass u m i ng 1

. 5 t o n s a nd 0

. 6 t o n s o f m a nu r e p e r ye ar f o r e ac h h e if e r a nd calf, r e s p e c t i v e l y)

V OC
E m issi o n fac t o r o f

12

. 8 l b s / h e a d /y r w as u s e d. T h is fac t o r w as c o n v e r te d t o 0

. 002 t o n VOC / t o n m a nu r e f o r m ilki ng c o w (ass u m i ng 5

. 25 t o n s o f m a nu r e p e r ye ar) a nd d iff e r e n t l y f o r h e if e rs a nd cal v es

P M 10
E m issi o n fac t o r o f

1

. 78 l b s / h e a d /y r w as u s e d a nd o n l y m ilki ng c o w s we r e acc o un te d ( p e r A RB’s

m et h o d o l o g y)

C on t r o l Eff i c i en cy

Ty pe o f D is po s al P r a c t i c e % C on t r o l R e m o v a l F a c t o r [ 0 T o t a l % C on t r o l Eff e c t iv ene ssEff e c t iv ene ss
- 1 ]

L and A pp li c a t i on 23% 0 .5 11

. 5%

C o m po s t i n g ( op en wi nd r o w) 75% 0 .5 38

. 5%

C o m po s t i n g( en c l o s ed) 95% 0 .5 47

. 5%

D ig e s t e r ( p l u g and c o m p l e t e mi x) 99% 1 .0 100%

Manu r e: S en t ou t o f B a sin 100% 0 .5 50%

T h e fr e qu e n c y o f m a nu r e r e mov al (r e qu ir e d b y R u l e 1127 ) is a n i m p o r t a n t fac t o r o f t h e c o n t r o l

e ffici e n c y.

In Oc t o b e r 2011

, we r e v is e d t h e i n v e n t o r y b y u si ng t h e mo s t r e c e n t h e a d c o un t s p r ov i d e d b y t h e

w a te r b o ar d s a nd t h e mo s t r e c e n t e m issi o n fac t o rs t h a t acc o un te d f o r e n te ric e m issi o n s

. T h e s u mm ar y

o f t h e e m issi o n e s t i m a te s, as we ll as t h e ass u m p t i o n s, g r o wt h fac t o rs, c o n t r o l fac t o rs, a nd e m issi o n fac t o rs ca n b e f o und fr om App e nd ix I o f t h e f o ll o w i ng Te c hn o l o g y A ss e ss m e n t:

h ttp : // www

. a q md

. g ov / hb / a tt ac h m e n ts / 2011

- 2015/2011 Oct / 2011

- Oct 7

- 022

. pdf

P l e as e n o te t h a t w i t h r e c e n t r e s e arc h

, p ar t ic u larl y b y UC D a v is, e m issi o n s ar e n o w b as e d o n h e a d c o un t
,
n o t t o n s o f m a nu r e.

I h o p e t h is i n f o r m a t i o n is h e l p f u l

. P l e as e l et m e k n o w if y o u h a v e f u r t h e r qu e s t i o n s.

B e s t,

Le

m p - R 1127 E m i ss i on s I n v en t o ry

. doc Te