### U n i te d S t a te s En v i r o n m e n t a l P r o tect i o n A g e n cy

R e g i o n IX

75 H a w t h o r n e S treet

S a n F r a n c i s c o, CA 94105

- 3901

J une 20, 2011

Tr an s m i tta l of EPA Ru l e R e v i e w C omments

T o: J ong Hoon Lee, S outh Coa s t A i r Q ua li t y Management D i s t

r i ct

j h l ee @ aqmd.gov

M i k e G u zz etta, Ca li fo r n i a A i r Re s ou rc e s B oa rd

mgu zz ett

@ a r b. c a.gov

Fr om: A nd r

ew S te ck e l , Ru l ema k i ng O ff i c e Ch i ef

s te ck e l .and r

ew @ epa.gov

R e: S outh Coa s t A Q MD P r opo s ed Ru l e 1133.3 (Gr eenwa s te Compo s t

i ng )

, J une 16, 2011

W e a r e p r o v i d i ng c omment

s ba s ed on ou r

p r e li m i na ry r

e v i ew of the d r

aft r u l e i dent

i f i ed abo v e. P l ea s e

d i r e c t an y que s t i on s about ou r c omment s to me at ( 415

) 947

- 4115 o r

to Nan cy

Le v i n at ( 415

) 972

- 3848.

1

. T he June 7

, 2011 d r a ft o f t h i s r u l e r equ i r ed a cove r

w i t h i n t h r ee hou r s o f co m pos t p il e

f o rm a t i on

. S ec t i on ( d )( 2 )( A ) o f t he June 16 r

ev i s i on expands t

he t i m e pe r i od t

o 24 hou r

s

. We a r e conce r ned t

ha t a ll o w i ng 24 hou r

s t o cove r t he co m pos t m ay s i gn i f

i can t l y i nc r ease

V O C e m i ss i ons

. A ppend i x III- 3 o f SCA QM D ' s d r

a ft s t a ff r epo rt sugges t

s t ha t s i gn i f i can t

e m i ss i ons m ay occu r

w i t h i n t he f i r s t 24 hou r

s o f co m pos t p il e f

o rm a t i on

. P l ease r

econs i de r

a sho rt e r t i m e pe r i od t

o cove r t he co m pos t o r exp l a i n w hy t ha t i s no t app r

op r i a t e

.

2

. S ec t

i ons ( d )( 2 )( B ) and ( C ) r

equ i r e co m pos t

w a t e r i ng be f o r e t u r n i ng

. P l ease acco m pany

t hese r equ i r e m en t s w i t h a m e t hod t o ensu r e app r op r i a t e m o i s t u r e

. S ee

, f o r exa m p l e

, t

he

" squeeze t

es t" desc r i bed i n t

he ana l ogous r u l e unde r deve l op m en t by t he S an Joaqu i n

V a ll ey APCD

.

3

. P l ease cons i de r

w he t he r any r ev i s i ons t

o SCA QM D ' s p r

ev i ous e m i ss i on p r

o j ec t i ons a r e

app r op r i a t e i n li gh t o f r

e l axa t i ons r e f l ec t ed i n t he m os t r

ecen t d r a ft r u l e

. F o r exa m p l e

, t he

d r a ft s t a ff r epo rt es t i m a t es t ha t cove r i ng t

he t op t h i r d o f a w i nd r o w a ft e r each t u r n i ng i n t

he

22

- day ac t

i ve cyc l e r

educes 53 % o f

V O C e m i ss i ons

. It a l so es t i m a t es a 24 % con tr

o l

e ff i c i ency f o r w a t e r app li ca t

i on p r i o r t

o each t u r n i ng i n t

he 22

- day cyc l e

. T he D i s tr i c t

shou l d c l a r i f

y w he t he r t hese con tr

o l es t i m a t es a r e s t ill app r op r i a t e

. S i m il a r l y

, i f t

he

e m i ss i on r

educ t i ons p r o j ec t ed f o r t he June 7 d r

a ft r u l e ( 0

. 9 t ons / day V O C ) r e l y on a

t h r ee

- hou r cove r r

equ i r e m en t t ha t i s s i gn i f

i can t l y r e l axed

, SCA QM D shou l d r ev i se t he

ana l ys i s o f e m i ss i on i m pac t s

. SCA QM D shou l d a l so r ev i se t he e m i ss i on es t

i m a t es t ha t

r e f l ec t t he li ke l y h i ghe r e m i ss i ons fr o m f ood w as t e

.