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# OAR Box 1875 Prepped by Ollie Stewart

Document

Number: 

# 60 ) ll-F- 7 Docket Number: 

# A-90-1 9

Printed 12/1/200811:12:47AM

Sheet 60of 86P. 2 

## A-90-1 9 ll-F- 7

Attache d ar e material s distribute d b yth e EPAa t a meetin g wit h OM B o n Augus t 11 , 199 2 (a.m.) . Belo wi s a lis t o f attendees . EPA Ja n Meye r Daphn e McMurre r Bruc e Jorda n Lydi a Wegma n Andre wOti s Patrici a Embre y OM B Ti mHun t TroyHillie r Ric k Belze r Stev e Aitke n Shantal e Won g

! 199 2 y ^
L EP A AI R DOCKE TP. 3



### EPA/OM B Meetin g o n Floo r Determinatio n Proces s

Potentia l concern s wit h th e proces s use d t o determin e th e floor s Combinin g dat a o n th e emissio n point s t o develo p th e source-wid e floo r Consideratio n o fpoint s whic h ha d les s tha n 1 2 percen t controlle d wit h th e RC T Us e o fth e 12t h percentil e vs . th e averag e performanc e o fth e bes t performin g 1 2 percen tP. 4

Combination

of Data on the Individual

Points to Determine the Source-wide

Floor 

## BACKGROUN

D

• Emission s an d characteristic s o fSOCM I source s var y widel yfro m plan t sit e t o plan t sit e Eac h i s uniqu e combinatio n o f processes , desig n characteristics , equipmen t an d operation s N o "typical " sourc e fo rthi s sourc e categor y Ou ranalyse s ar e no t base d o n on e mode l plant , bu t instea d o n mode l emissio n streams
. Ther e are : 9 5 mode l ven t stream s 40 0 mode l wastewate rstream s 9 mode l tan k

farm s 2 1 mode l transfe rrack s

• Commo n characteristic s o fSOCM I source s ar e th e generi cemissio n point s an d applicabl e contro l technique s

• T X an d L Ahav e majorit yo f SOCM I facilitie s an d hav e rule s regulatin g emission s fro m vents , storag e vessels , an d transfe rrack s requirement s ar e simila rt o CTG' s (an d ou rRCT )P. 5

CONCLUSION S

B y expressin g th e source-wid e floo r a s equatio n consistin g ofterm s fo reac h kin d ofemissio n point , th e resultan t floo rwoul d compl y wit h th e statut e an y singl e emissio n rate , % reduction , etc . tha t wa s derive d fro m th e impact analyses : O woul d allo wsom e processes t o be uncontrolle d O woul d not be achievabl e fo r som e processes Allow s fo requitabl e treatmen t o fal l SOCM I sources

•Mos t consisten t wit h existin g rules fo rSOCM I source s an d wit h th e technolog y based standard s dat a base used t o suppor

t thi s rulemakin g

•Disadvantage s o

fdevelopin g a singl e performanc e leve l t o represen t th e source-wid e floo rinclude : does not allo wfo r sit e specifi c variation s (su m o f th e par t approac h ofdoes) ; has potentia l fo r limitin g growt h an d operationa l flexibilit y does not reflec t change s i n desig n an d operatio n o f processes ove rtim e assumption s require d t o estimat e a source-wid e % reductio n o rmass o

femission sP. 6

Consideration

of Points Which Had Less Than 12 Percent Controlled

With The RCT BACKGROUN D

•Process

fo reac h kin d o

femissio n point , arraye d th e databas e b

y emissio n characteristic s (i.e. , physica l parameters suc h as flo wrate , HA P concentration , an d vapo r pressure) ordere d fro m lo wt o hig h emissio n potentia l (o r surrogate measure) Cumulative percen t controlle d wit h th e referenc e technology(ies ) wa s calculate d Boundar y a t whic h a t least 12 % ofth e point s wer e controlle d b

y th e RC

Tused t o defin e th e emissio n characteristic s associate d wit h th e bes t performin g 12 % Th e calculatio n o fth e averag e wa s omitte d becaus e al l point s assigne d th e sam e efficienc y CONCLUSIO N

•N o contro l efficienc y wa s assigne d t o point s belo wth e 12 % boundar

y becaus e ther e i s n o widel y applicabl e technolog y tha t provide s th e partia l contro l whe n properl y operate d an d maintaine d

•N o partia l contro l option s availabl e fo rnationwid e rul eP. 7

12th Percentile

vs. Average

of the Best Performing

12 Percent



### BACKGROUN

D

•Databas e reflect s an y control s tha t woul d be require d b y applicabl e stat e o r Federa l regulation s

•Thes e regulation s typicall y requir e use ofmost effectiv e contro l technologie s (o r performanc e levels ) tha t ar e generall y applicabl e Control s eithe rwor k

o r don' t work ; wid e rang e of contro l efficiencie s ar

e not availabl e Distinctio n i s controlle d vs . uncontrolle d (e.g. , 0 vs . 98 % reduction ) CONCLUSIO N

•I n thi s case , th e averag e achieve d b y th e best performin g 1 2 percen t i s th e sam e as th e 12t h percentil e performanc e level .
•Approac h does not impl y a preceden t fo rfutur e standard sP. 8



### Summar y o fFloo r Analyse s Process Vent s Ranked b

y C/ E fro m hig h t o low ; range d fro m $18 4 billion/M g t o $4/M g 12 % controlle d at C/

E <$1,500/M g •44 % o

fvent s wit h C/

E <$1,500/M g controlle d b

y 98 % devic e •10 % ofvent s wit h C/ E >$1,500/M g controlle d b

y 98 % devic e Storag e Vessel s

Examine d mode l tank

s i n 3 group s Fo reac h group , ranke d b y vapo r pressur

e fro m lo w t o hig h (i.e. , hig h C/

E t o lo wC/E ) 10,00 0 t o 20,00 0 gallons : •n o tanks controlle d a t an y vapo rpressur e 20,00 0 t o 40,00 0 gallons : •0 % oftanks wit h v p < 1. 9 psi a controlle d •17 % oftank

s wit h v p > 1. 9 psi a controlle d 40,00 0 gallon s & up : •7 % oftank

s wit h v p < 1. 9 psi a controlle d •23 % o

ftank s wit h v p > 1. 9 psi a controlle dP. 9

•Transfe rOperation s

Examine d mode l rack

s i n 2 group s Fo reac h group , ranke d b y throughpu t fro m lo wt o hig h (i.e. , hig h C/

E t o lo wC/E ) 12 % foun d •rack

s wit h v p < 1. 5 psia : n o controlle d rack

s a t an y throughpu t

•rack

s wit h v p > 1. 5 psia : n o controlle d rack

s wit h throughput s < 0.1 7 MMGal/y r Wastewate r

Th e tw o relevan t regulation s (Viny l Chlorid e NESHA P an d Benzen e Wast e NESHAP ) eithe r contro l al l stream s o r n o stream s •Differen t approac h used : examine d percentag e ofal l processes an d stream s controlle d Foun d onl y 2.5 % o

fth e stream s an d onl y 5.1 % of processes controlle d fo rai r emission s