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# OAR Box 1875 Prepped by Ollie Stewart



### Document

Number: 

# 50 ) ll-E-6 8 Docket Number: 

# A-90-1 9

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AM Sheet 50of 86P. 2 

## A-90-1 9 ll-E-6 8
o r t

_ _UNITE D STATE S ENVIRONMENTA L PROTEC T
. . . . . | KMK ^ 1 Offic e o f Ai rQualit yPlannin g an d Standard s \ ^yv|y ^ / Researc h Triangl e Park , Nort h Carolin a 2771 1

MEMORANDU M DE C 4 I99 2
SUBJECT : CM Aan d EPA/ES D Meetin g o f Jun e 19 , 199 2 o n

Applicabilit yo f th e Hazardou s Organi c NESHA P (HON ) FROM : Jane t S . Meye r

Standard s Developmen t Branch , ES D TO : Docke t A-90-19 , Hazardou s Organi c NESHAP :

Genera l Informatio n an d Proces s Vent s I . Purpos e Thi s meetin g wa s hel d t o discus s th e Chemica l Manufacturer s Association' s (CMA's ) suggeste d clarification s o f th e applicabilit yo f th e draf t proposa l package . II . Plac e an d Dat e o f Meetin g N . C . Mutua l Bldg . Larg e 6t h floo r conferenc e roo m , "\; \

. Durham , Nort h Carolin a \,3 ; Y Jun e 16 , 199 2 \$_ u '* ^ Attendee s „- * - Ck. Davi d Gustafson , DO W Chemica l j^—*" * Am yMeyers , CM A'"""" * Ja n Meyer , EPA/ESD/SD B IV . Discussio n Attachmen t 1 present s CMA' s suggeste d edit s o f th e draf t Subpar t F . Th e suggeste d change s includ e CMA' s editoria l correction s t o th e text , change s t o reflec t CMA' s recommende d approac h fo r definin g applicability , an d suggestion s o n a mean s t o resolv e th e overla p betwee n produc t accumulato r vent s an d proces s vent s an d storag e vents . Ja n Meye r agree d t o revie wth e suggeste d change s an d conside r whethe r th e change s woul d hel p clarif yapplicabilit yo f th e rule . Attachmen tP. 3

•Attachmen

t 1 bf^AT T
§63.100(b)(iii) , pag e 30 1 (iii ) Fo r chemica l manufacturin g processe s tha t ar e designe dan doperate d a s eithe r batc hoperation s o r

a s flexible operatio n plant s wher e differen t primar y product s ar e produce di n cycles , th e provision s of Subpart s F , G , an dH shal l onl y appl y durin g thos e time s whe n th e CM Pi s producin g a s aprimar y produc t on e of th e chemical s liste di n 663.10 5 o f thi s Subpart , o r

i n 663.18 4 o f

Subpar t H
. equipmen t

i s operatin g wit hprocesse s tha t us e organi c HAP' s a s areactan t o r tha t produc e a s aproduc t

on e o r mor e o f th e organi c HAP' s liste di n §63.10 1 for Subpart s Fan dG , o r

th e VHAP' s liste di n §63.18 3 fo r Subpar t H
. §63.100(b)(4) , pag e 30 3 (4 ) Wher e astorag e vessel s o r transfe r racks-ar e i s share damon g CMP s tha t ar e no t subjec t t o thi s Subpar t

an dCMP s tha t

ar e subject , th e storag e vesse l o r transfe r rac k shal l b e considere dpar t o f th e manufacturin g proces s tha t ha s th e predominat e use . I

f th e throughpu t

predominat e us e associate dwit htw o o r mor e CMP s o f

avesse l o r

rac k at e i s equal , an da______S t on e o f th e processe s CMP s i s subjec t

t o thi s Subpart , th e vesse l o r rac k shal l b e considere dpar t of th e proces s CM Ptha t

i s subjec t

t o thi s Subpart
. {_ ) Storag e vessel s an dtransfe r rack s tha t

ar e directl y relate dt o th e operatio n o f

aCMP , an dar e clearl y locate dwithi n th e sam e CMP' s boundar y shal l onl y b e regulate da s equipmen t withi n tha t

specifi c CMP
. (ii ) Storag e vessel s an dtransfe r rack s tha t

ar e locate dwithi n aCM P boundar y bu t

ar e no t directl y relate dt o tha t

CM Pwil l b e regulated , i f applicable , b y thei r predominat e us e CM Pdescriptio n below
. {iU ) Th e predominat e us e applie s t o storag e vessel s an dtransfe r rack s withi n th e contiguou s facility tha t ar e eithe r

no t specificall y locate dwithi n a CM Pboundary , o r

the y ar e reference di n 663.100fb,,4ViiV Th e predominat e us e i s th e CM Pprovidin g th e greates t throughpu t

int o th e storag e vesse l o r transfe r rac k or . if th e greates t

inpu t int o th e vesse l o r

rac k i s fro moff-sit e o f

th e contiguou s facility , the n th e predominat e us e i s th e CM Pwhic hreceive s th e greates t amoun t o f productiro mth e vesse l o r rack
. (ix ) I n situation s wher e astorag e vesse l change s contents , th e chemica l tha t i s store di n th e vesse l fo r th e majorit y o f

a n annua l calenda r

perio dwil l b e use dt o determin e th e predominat e use .

NOTE : Strik e through s indicat e remove d text ; Underline d tex t indicate s suggeste d

change .P. 4

§63.100(b)(5) , pag e 304 (5 ) Fo r

th e purpose s o f

thi s Subpart , th e equipmen t associate dwit ha chemica l manufacturin g proces s i s considere dt o star t a t th e storag e vesse l fo r fee do r ra w material s an dcontinue s throug hal l th e uni t proces s operation s u p t o th e entranc e t o th e nex t

ai r oxidatio n o r

reacto r operatio n o r

transfe r of th e produc t of f site , th e chemica l manufacturin g proces s (CMP , consist s of th e equipmen t

tha t i s use dt o produc e aprimar y produc t liste di n §63.105
. Th e CM P ma y als o includ e othe r

equipmen t

tha t produce s intermediat e o r fina l product s tha t ar e directl y associate dwit hth e primar y produc t du e t o th e chemistr y o f th e process . Th e specifi c equipmen t ca n typicall y includ e ai r oxidation , reactor , an d distillatio n units , an di t

ma y includ e feed , intermediat e an dfinal produc t storag e tank s an dtransfe r

racks
. Paragraph (i) below may be a better fit in a preamble discussion...Comments? (i ) Th e equipmen t

als o include s al l storag e vessel s use dt o receiv e produc t fro mth e CM Ptha t

d o no t provid e fee do r

ra w material s fo r

othe r on-sit e processes . Th e CM Pboundar y i s usuall y determine db y managemen t decision s tha t separat e CMP s becaus e o f operating , maintenanc e o r accountin g responsibilitie s relate dt o th e primar y product
. Th e boundar y ma y als o b e determine db y physica l condition s suc ha s roadways , o r a t isolatio n valve s tha t separat e differen t

CMPs
. (ii ) Th e pipin g an dequipmen t tha t transfer s HA Pmaterial s betwee n tw o CMP s i s no t

considere dt o b e equipmen t withi n th e CM Pboundar y an di t i s no t subjec t t o th e HON
. unles s specificall y identifie di n Subpar t F
. Go r H
. Th e owne r o r operato r ma y assig n t o eithe r

CM Pan y storag e vesse l tha t bot hstore s produc t for mon e CM Psubjec t

t o thi s Subpar t

an dsupplie s ra w materia l t o anothe r CM Psubjec t

t o thi s Subpart
. (iii ) Equipmen t

withi n th e CM Pboundar y tha t doe s no t contai n HAPs
. excep t fo r trac e quantities , wil l no t b e subjec t

t o th e HON
. Fo r

example , i

f a distillatio n trai n remove s al l of th e HAP s (belo w th e applicabilit y threshol di n th e respectiv e standard )
. the n th e equipmen t downstrea mof

thi s remova l ste p i s no t subjec t t o th e standard
. §63.100(c) , pag e 30 4 (c ) Th e followin g ar e no t subjec t t o Subpart s Fthrough
. Gan dH : (1 ) An y chemica l manufacturin g proces s (CMP , tha t doe s no t produc e a s aprimar y produc t

an y of th e chemical s liste di n 663.10 5 o f thi s Subpar t

o r i n 663.18 4 of

Subpar t H
.P. 5 

## "biaA^ T
(2>&

_An y chemica l manufacturin g proces s producin g achemica l liste d i n §63.10 5 of

thi s Subpar t

o r i n §63.18 4 of

Subpar t H tha t doe s no t us e a s a reactan t o r manufactur e a s aprimar y produc t on e o r mor e of th e organi c HAP' s liste di n §63.104 of

thi s Subpar t

o r th e VHAP' s liste di n §63.18 3 o f Subpar t H i s exemp t fro mal l provision s o f

Subpart s F , G , an dH excep t th e reportin g an d recordkeepin g requirement s i n §63.103(e ) of thi s Subpart
. , (3)(2 ) Th e provision s of

Subpart s Fthroug hH d o no t appl y t o an y * Researc han ddevelopmen t facilities , regardles s o f

whethe r th e facilitie s ar e locate da t th e sam e plan t

sit e a s asourc e CM Ptha t i s subjec t

t o th e provision s o f thi s Subpart s F
. Go r

H
. (4)(3
. Th e provision s of

Subpart s Fthroug hH d o no t appl y t o an y pPetroleu mrefinin g processes , regardles s o f whethe r th e uni t supplie s feedstock s tha t

includ e chemical s liste di n §63.10 5 t o chemica l manufacturin g processe s tha t

ar e subjec t

t o th e provision s of

Subpart s Fthrough , Go r H
. (5 ) Ethylen e processes , regardles s o f whethe r th e uni t supplie s feedstock s tha t

includ e chemical s liste di n 663.10 5 o r 663.18 4 t o CMP s tha t

ar e subjec t t o provision s o f

Subpart s F
. Go r

H
. §63.10 1 Definitions , pag e 30 7 Chemica l manufacturin g proces s (CMP ) mean s th e equipmen t assemble dan dconnecte db y pipe s o r duct s t o manufactur e a s aprimar y product ^ on e o r mor e of th e chemical s liste di n §63.10 5 o f th e Subpart
. Th e CM Pma y als o includ e othe r

equipmen t

tha t produce s intermediat e o r final product s tha t

ar e directl y associate dwit hth e primar y produc t du e t o th e chemistr y o f th e process . Fo r th e purpos e o f

thi s Subpart , CM Pinclude s al l th e equipmen t associate dwit h th e uni t operation s includin g ai r oxidation , reacto r

an ddistillatio n units , an di t ma y includ e feed , intermediat e an dfinal produc t storag e tank s an dtransfe r rack s i f the y ar e regulate dequipmen t identifie di n 663.1000
. ,(4
. storag e an d transpor t o f fee dmateria l t o th e uni t operations , an dstorag e an dtransfe r o f product s fro mth e uni t

operations
. Th e CM Pi s identifie db y it s primar y 

## product , Ethylen e Proces s refer s t o aCM Pi n whic hethylen e an d/o r propylen e ar e produce db y separatio n fro mpetroleu mrefinin g proces s stream s o r b y subjectin g hydrocarbon s t o hig htemperature s i n th e presenc e o f stea man dthe n separatin g an dpurifyin g thes e chemicals
. Th e ethylen e proces s include s al l equipmen t

use di n th e pretreatmen t o f th e ra w material s an dothe r associate d streams , includin g stream s containin g on e o r mor e chemical s liste di n 663.104
. 663.105
. 663.183
. o r

663.18 4 whic har e subsequentl y extracte dan dpurifie di n anothe r CMP
.P. 6 

### T^RAP T
Primar y Produc t

mean s an y achemica

l o r compoun dliste di n §63.105 o f thi s Subpart s o r

663.184 o f Subpart H
. whic hi s manufacture da s ihf i afina l primary intende dproduc t o f aCMP , a s tha t

chemical , o r

fo r us e i n th e productio n o

f othe r chemical s or

compounds
. C o products , by-products , an d isolate dintermediate s tha t ar e separate dan dsubsequentl y use di n othe r processe s ar e considere dt o b e products
. Reactio n intermediate s tha t ar e neve r isolate dar e no t

considere dproducts
. Th e primary intende dproduc t fo r aCM P is ; 0 } th e chemica

l o r compoun dwhos e productio n i s clearl y th e intende dpurpos e o

f th e CMP , o r (2) i f onl y on e intende dprimary produc t ca n no t b e clearl y established , the n th e primary intende dproduc t i s th e chemical o r compoun dtha t

i s predominat e whe n evaluate do n an annua l desig n capacit

y mas s basis , however
. mi f all o f th e intende dprimary product s are equal , an dan y o f the mar e liste di n either

663.105 o r

663.184
. the n on e o

f thos e liste dchemical s o r

compound s mus t

b e selecte da s th e primary product
.
The following discussion addresses some of the concerns that

where discussed

at one of ourrecent

AirToxics Meetings. The marked-up text will be added at

the end once the concept is agreed upon PRODUCT ACCUMULATORVESSEL S (PAVs ) §63.100(e), page 305(primary reference location) ISSU E Th e inclusio n of

produc t accumulato r

vesse l requirement s i n th e HO N MACT Standard s i s unnecessary an dshoul db e remove dt o enhanc e complianc e wit h th e rule
. Th e vent s tha t

wer e intende dfo

r coverag e hav e alread y bee n effectivel y addresse db y th e curren t

structur e o

f th e draf t rule
. Suggeste dlanguag e tha t wil l achiev e simila

r result s i s include da t

th e en do f thi s paper . BACKGROUN

D Produc t Accumulato r

Vessel (PAV) requirement s currentl y exis t i n Subpart

V , NESHA Pstandard s fo

r viny l chlorid e an dbenzen e equipmen t leaks
. Thi s standar drequire s tha t

PAV s b e equippe dwithaclosed-ven t syste mcapabl e o

f capturin g an dtransportin g any leakag e fromth e vesse l t o acontro l device
.P. 7 

## DI^A^ 1 

## " "
Th e inclusio n o

f th e PA V requirement

int o th e equipmen t

lea k regulation s ha s alway s create dconfusio n sinc e th e PA V inclusio n wa s focuse do n th e contro l o f a proces s ven t

instea dof

a n fugitiv e typ e o

f emission
. Th e pipin g an d component s associate dwit haPA V woul db e addresse db y th e othe r languag e i n th e rule , i f applicable
. Th e rationa l fo

r inclusio n o

f th e PA V requiremen t

int o Subpart

V i s believe dt o resul t fro magenera l nee dt o regulat e PA V "vents " unde r

thi s rul e sinc e abette r fi t di dno t exis t elsewhere
. I n th e preambl e fo r Subpart J (49 F R23500 , Jun e 6 , 1984) , th e followin g rationa l help s t o documen t thi s belief

. "Th e standar dfo

r produc t accumulato r

vessel s effectively require s ventin g accumulato r

vesse l emission s t o asyste mtha t complie s wit hth e requirement s a s discusse di n th e Closed-ven t system s an d contro l device s portio n o

f thi s sectio n o

f th e preamble. " (emphasi s added ) I n addition , 4 9 F

R2351 4 define s aPA

V as : "..
. an y distillat e receiver , bottom s receiver , surg e contro l vessel , o r separato r i n VHAPservic e tha t

i s vente dt o atmospher e eithe r directl y o r

throug havacuum-producin g system... " (emphasi s added ) Sinc e Subpart

V regulate donl y viny l chlorid e an dbenzene , th e overal l confusio n an dimplementatio n difficult y wa s no t excessive
. CURREN T CONCER

N Th e inclusio n o

f th e PA V requirement s ha s bee n include dwit hth e draf t notic e o f th e Equipmen t

Leak s Rul e (5 6 F

R9315 , Marc h6,1991 ) whic hi s intende dt o expan dth e requirement

fromtw o chemical s t o 14 9 liste dchemical s an d compound s o

f chemicals
. Thi s actio n raise s th e followin g issues : 1
. Th e practical understandin g an dimplementatio n i s extremel y difficult sinc e th e identificatio n o

f thes e unit s i s no t

clear
. Thi s confusio n i s complicate db y th e inclusio n o f aven t provisio n i n a n equipmen t lea k regulation
. 2
. Th e curren t

MACT HO N activit

y als o addresse s PAV s o n pag e 305 o f th e draf t rul e b y stating : "(e ) Th e equipmen t

leak s standard s i n Subpart H o f thi s Part shal l no t appl y t o aproduc t

accumulato r

vesse l i f th e ven t fromth e produc t

accumulato r

vesse l i s i n complianc e wit hP. 8



### th e provision s fo

r proces s vent s i n Subpart

Go f thi s Part. " (emphasi s added ) Th e applicability fo

r th e proces s vent s i s believe dt o b e mor e stringen t an d encompassin g tha n th e Subpart H requirements , whic hshoul deffectively eliminat e th e nee dt o referenc e Subpart H
. Th e onl y applicability are a tha t woul dno t

b e covere dare th e six special case s fo r specifie dchemical i n proces s unit s suc ha s styrene-butadien e rubber production , polybutadien e production , chlorin e production , pesticid e production , chlorinate dhydrocarbo n use , pharmaceutica l production , an d miscellaneou s butadien e use . However , sinc e th e apparen t inten t i s t o regulat e vent s fromPAVs , thes e vent s shoul db e addresse ddurin g th e MAC T rulemakin g fo

r tha t specifi c sourc e category , no t unde r th e equipmen t

lea k rule
. 3
. Th e definitio n fo

r PAV s o n pag e 34 6 o

f th e draf t rul e refer s t o equipmen t tha t i s eithe r areceiver , surg e vesse l o r produc t separator . Th e definitio n i s identifyin g equipmen t

tha t can bes t b e describe da s astorag e vessel
. Thes e storag e vessel s woul dtypicall y hav e amuc hshorte r hol dtim e tha n avesse l tha t

store s afina

l product , an di n man y case s th e flo w throug hth e tan k wil l b e continuous
. Th e clarit y o f th e rul e coul db e greatl y improve d b y addressin g thes e vessel s unde r th e HO N MACT standar dfo r storag e vessels , an ddroppin g th e reference s fo r PAVs
. Takin g thi s actio n shoul d resul t i n th e sam e intent , bu t

wit hmuc hles s uncertainty
. RECOMMENDE

D CHANGE S Th e followin g languag e fromth e draf t rul e contain s mark-up s tha t reflec t change s tha t

wil l improv e th e overal l implementatio n o f th e rule : .marked-u p tex t

t o b e adde dlater
.

-EN D OFFAX

-