P.1 7 

# ff'fhP/

Tuesda y Septembe r 30 , 198 6



# Part I X 

# Environmenta l Protectio n Agenc y
4 0 CF R Par

t 6 1 Nationa l Emission s Standard s fo r Hazardou s Ai r Pollutants : Viny l Chloride ; Equipmen t Leaks o f Volatil e Hazardou s Ai r Pollutants ; Fina l Rul ePJ 6



### Federa l Registe r

/ Vol

. 51 , No

. 18 9 /

Tuesday , Septembe r

30 , 198 6 /

Rule s an dRegulation s
ENVIRONMENTA L PROTECTIO N AGENC Y 4 0 CF R Part 6 1 [AD-FRL-3044-5 ] Nationa l Emissio n Standard s fo r Hazardou s Ai rPollutants : Viny l Chloride ; Equipmen t Leak s o f Volatil e Hazardou s Ai rPollutant s 

### AGENCY : Environmental Protectio n Agenc y (EPA)

. ACTION : 

### Fina

l rule

. SUMMARY : Th e EP

A propose d 

### administrativ e an dclarifyin g revision s to th e nationa l emissio n standar dfo r viny l chlorid e (VC) o n January 9,1985 , (5 0 F R1182)

. Certai n revision s t o th e standar dar e bein g promulgate din Subpart Fthroughthi s actio n and , to a mino r extent , in Subpart

V o f 40 CF R Part 61

. Finally , throughthi s actio n th e Agenc y i s denyin g th e petitio no f th e Natura l Resource s Defens e Counci l (NRDC ) an dth e Environmental Defens e Fund(EDF

) whic hsought reconsideratio n o

f th e EPA' s withdrawa l o f th e amendment s to th e V C standar d whic hwer e propose di

n 1977

. EFFECTIV EDATE : Septembe r

30,1986

. Under sectio n 307(b)(1 ) o

f th e Clea n Air Act , judicial revie w o

f th e action s take n b y thi s notic e i s availabl e only b y filing o f apetitio n fo

r revie w in th e Unite d State s Cour

t o f Appeal s fo

r th e Distric t o f Columbi acircui t

withi n6 0 day s o f today' s publicatio n o

f thi s rule

. Under sectio n 307(b)(2) o

f th e Clea n Ai r Act , th e requirement s that

ar e th e subjec t

fo r today' s notic e ma

y no t b e challenge d late r i n civil o r criminal proceeding s brought b y EP A to enforc e thes e requirements

. Incorporatio

n b y Referenc e Th e incorporatio

n b y referenc e o f certai n publication s i

n thes e standard s i s approve d b y th e Directo r o f th e Offic e o f th e Federa l Registe r as o f Septembe r 30,1986

. ADDRESSES : Background Information Document. Th e backgroun dinformatio n documen t (BID ) fo r th e promulgate d standard s ma

y b e obtaine dfro

mth e U.S

. EP A Librar y (MD-35) , Researc h Triangl e Park , Nort

hCarolin a27711 , telephon e number

(919) 541-2777

. Pleas e refer to "Viny l Chlorid e Standard : Response s t

o Comment s on January 1985 Propose dRevisions, " EPA-450/3-86

- 004

. Th e BI

D contains : (1 ) A summar y o f al l publi c comment s o n th e propose d revision s an dth e Administrator' s respons e to th e comments , an d(2 ) a summar y o f th e change s mad e to th e revise dstandar dsinc e proposal

. Dockets. A docket , number A-81-21 , containin g informatio nconsidere db y EP A in developin g o

f th e promulgate d revision s to th e standar dfo r VC , i s availabl e fo

r publi c inspectio n betwee n 8:0 0 a.m
. an d4:0

0 p.m. , Monday throug h Friday , at EPA' s Central Docket

Sectio n (LE-131) , Wes t

Towe r Lobby , Galler

y 1 , 40 1 M Street , SW. , Washington , DC 20460

. A reasonabl e fee ma y b e charge d fo r copying

. FO H FURTHE R INFORMATIO N CONTACT : 

### For further informatio nconcernin g th e enforcement

aspect s o

f th e promulgate d revisions , contac t

Mr

. RichardBiondi , Complianc e Monitorin g Branch , Stationary Sourc e Complianc e Division , (EN-341) , U.S

. Environmental Protectio n Agency , 40 1 M Stree t

SW. , Washington , D C 20469 , telephon e number (202 ) 382

- 2826

. For further informatio nconcernin g th e backgroun dtechnical informatio n supportin g th e promulgate drevisions , contac t Mr

. Rober

t E

. Rosensteel , Chemical s an dPetroleu mBranch , Emissio n Standard s an dEngineerin g Divisio n (MD-13) , U.S

. Environmental Protectio n Agency , Researc hTriangl e Park , Nort hCarolin a27711 , telephon e number (919) 541-5671

. For

othe r informatio n on th e regulatio no f V C an d th e promulgate drevisions , contac t Mr

. Fre dDimmick , Standard s Development Branch , Emissio n Standard s an d Engineerin g Divisio n(MD-13) , U.S

. Environmental Protectio nAgency , Researc hTriangl e Park , Nort hCarolin a 27711 , telephon e numbe r

(919) 541-5578

. SUPPLEMENTAR

Y INFORMATION : 

### Summar y o f Revision s t o th e Standar d Th e V C standar dwa s promulgate do n Octobe r 21,197 6 (4 1 F

R46560 ) an d applie s to plant s producin g ethylen e dichlorid e (EDC

) vi aoxychlorination , plan t producin g VC , an dplant s producin g polyviny l chlorid e (PVC) or othe r polymer s containin g VC

. Thes e plant s ar e subjec t

to acombinatio n o

f performance , equipment

an dwor k practic e requirement s at

numerou s point s in th e manufacturin g processes
. Base do n it s revie w o

f tiie technological basi s an dadministrativ e aspect s o f th e original standard , EP

A propose dsevera l administrativ e an dclarifyin g revision s t o th e standar don January 9,198 5 (5 0 F R 1182)

. Th e comment s receive dan d action s take n onthes e propose d revision s ar e discusse dbelow

. Requirements

for Leak Detection

and Repair Programs 

### A s propose din January 1985 , V C i s bein g adde dto th e lis t

o f substance s covere db y 40 CF

RPart 6 1 Subpart

V , whic hcontain s regulation s fo r leak s fro mcertai n equipment

in volatil e hazardou s ai r

pollutan t (VHAP ) service

. Previously , plan t

owner s subjec t

to th e V C standar dwer e require dto prepar e lea k detectio nan drepai r

plan s fo r eac h V C an dPV C manufacturin g facilit

y an d to submi t thes e plan s to EP

A fo r review

. A n analysi s o

f th e plan s submitte d reveale dthat

thes e plan s varie dwidel y fro mplan t to plant

. Further , some plan s wer e considere dto b e inadequat e an d ineffectiv e approache s t o th e contro l o f V C leaks

. Th e incorporatio no

f Subpart V b y th e standar dfo

r V C emission s establishe s standardize dprocedure s fo r identifyin g leak s o f V C an dfo r takin g step s t o minimiz e emission s an drepai r leaks

. Further , th e incorporatio no f Subpart V wil l als o accomplis hastandardizatio n o f th e definitio n o

f wha t constitute s a lea k fo r routin e lea

k detection. However , t o avoi dunnecessar y change s to existin g plan s whic har e effectiv e in detectin g an drepairin g V C leaks , th e standar dcontain s provision s whereb y an y facilit y ma y demonstrat e throug h annua l (o r more frequent , i

f requeste d b y th e Administrator ) performanc e test s that th e percentag e o

f leakin g valves remain s at

2 percen t a s a nalternativ e t o following th e Subpart

V procedures

. An owne r ma y continu e to follow th e existin g lea

k detectio n an deliminatio n progra mfo r tha t facilit y fo r th e purpos e o f achievin g th e 2 percen t

performanc e limit

. However , existin g plan s ar e n o longer required , no r

do the y necessaril y meet th e promulgate drequirements

. Compliance

Test Procedure

and Specific Opening Loss Limit for PVC Reactors Used as Strippers 

### Th e Federal Register

notic e tha t promulgate dth e curren t

V C standar d state dthat

V C escapin g fro

mPV C resi n that ha s bee nstrippe dinth e reacto r i s no t intende dt o b e include da s part o f th e V C emission s measure dunde r th e reacto r openin g los s requirements

. For nonbulk PV C reactor s whic har e use da s strippers , however , n o metho dwa s specifie dto determin e wha t part o f th e V C in th e vapo r

spac e o f th e reacto r

ha d escape dafter

th e strippin g wa s completed

. Consequently , ametho dwa s propose dfo

r determinin g th e reacto r openin g los s that

account s fo

r strippin g in th e PVC reacto r

fo r us e b y al l nonbulk resi nproducers

. Afte

r considerin g th e comment s o n thi s propose drevision , EP

A decide dto promulgate th e revision

. Anothe r propose dchang e inth e standar daffecting PV

C reactor s use da s stripper s applie dt

o th e productio n o

f bulk PV C resins

. Tw o separat e vessel s ar e use dinbulk

resi n production , a "prepolymerization " vesse l an da"post

polymerization " vessel

. Under th e standar dpromulgate din1976 , bot ho f thes e vessel s wer e subjec t to th e reacto rP.1 8



### Federa l RegisSei

r / Vol

. 51 , No

. 18 9 /

Tuesday , Septembe r

30 , 198 6 /

Rule s an dRegulation s 3480 5
openin g los s requirements

. However , a n analysi s o f

th e operatio n o f prepolymerizatio n vessel s reveale dtha t thes e reactor s ar e opene dles s frequend y ma n othe r

type s o f reactors , an dtha t th e determinatio n o f

gros s produc t (require dfo r

th e calculatio n o f reacto r openin g loss ) i s impractical

. I n Januar y 1985 , EP A propose dt o appl y th e equipmen t

openin g los s requirements , rathe r tha n th e reacto r

openin g los s requirements , t o thes e PV C reactors

. Th e equipmen t

openin g los s requirement s ar e mor e appropriat e fo r th e operatin g characteristic s o f th e prepolymerizatio n reacto r vessel s an d d o no t chang e th e overal l V C emissio n contro l stringenc y applicabl e prepolymerizatio n reactors

. Afte r considerin g th e comment s o n thi s propose drevision , EP A decide dt o promulgat e th e revision

. Clarification of

Definitions and Standards Base do n th e EPA' s experienc e wit h administerin g th e V C standard , severa l provision s o f

di e standar dar e bein g revise dt o reduc e an y ambiguit y i n thei r implementation

. Fo r

example , specifi c definition s of

"leak, " "exhaus t

gas, " an d "relie f valv e discharge " ar e bein g adde d t o clarif y th e applicabilit y of

di e provision s o f

th e standar dt o eac ho f thes e type s o f

emissions

. Similarly , t o eliminat e misunderstanding s abou t th e applicatio n o f

th e standar dt o purificatio n equipmen t

followin g ED C an dV C formation , th e definition s o f "ED C purification " an d"V C purification " ar e bein g revise dt o mor e clearl y indicat e whic hequipmen t i s subjec t t o th e standard

. Anothe r revisio n bein g incorporate d int o th e standar dmake s i t clea r tha t th e 1 0 ppm v standar di s a3-hou r averag e emissio n limit , rathe r

tha n a n instantaneou s limit

. Th e performanc e tes t provisio n i n § 61.67(g)(1 ) ha s als o bee n clarifie dt o specif

y tha t tes t result s shoul dreflec t

a s clos e t o a3-hou r averag e a s practicable

. Further , th e 1 0 ppm v standar dregulatio n i s bein g revise dt o specif

y tha t al l exhaus t

ga s stream s ar e covere db y thi s requirement , includin g contro l devic e bypas s streams

. I n orde r t o implemen t thi s clarification , provision s ar e als o bein g incorporate dint o th e standar dfo r calculatin g th e V C conten t i nbypasse d emissions

. A fina l revisio n t o th e 1 0 ppm v requiremen t

i s intende dt o prohibi t plant s fro mdilutin g aV C exhaus t ga s strea mwit hothe r

exhaus t gase s i n orde r

t o mee t th e 1 0 ppm v limit

. Unde r th e revise dstandard , combinin g a n exhaus t

strea mcontainin g mor e tha n 1 0 ppm v V C wit hanothe r ga s strea mi s onl y allowe dwhe n th e combine dstrea m

i s ducte dt o acontro l device

. Th e inproces s wastewate r requirement s fo r

gasholde r

seal s ar e als o bein g revise dt o exclud e th e expose dwate r

sea l o f gasholders

. Experienc e wit hth e V C standar d indicate s tha t

wate r containe di ntiie expose dwate r

sea l o f agasholde r

ma y excee dth e 1 0 ppm v limi t durin g norma l operatio n an dtha t

complianc e witi i th e atmospheri c exposur e limi t i s no t practicabl e fo r

thi s source
. Th e inproces s wastewate r

strippin g requirements , however , wil l continu e t o appl y t o wastewate r

afte r remova l fro m th e gasholde r

seal

. Other Administrative Revisions Othe r administrativ e revision s t o th e standar dinclude : (1 ) Th e eliminatio no f th e 30-da y limi t

fo r existin g source s t o submi t request s fo r

th e us e o f

equivalen t contro l measures ; (2 ) achang e fro m semiannua l t o quarterl y reportin g o f V C emission s fro mresi n stripping , reacto r openings , an dexhaus t

gases ; an d(3 ) allowanc e o f

reportin g o f

period s o f exces s emission s instea do f al l emissio n measurements

. Summar y o f

Impact s t o th e Standar d Revision s t o th e standar drepresen t administrativ e an dclarifyin g changes ; n o majo r revision s wer e proposed

. Therefore , th e environmental , energ y an deconomi c impact s o f th e origina l standar dremai n generall y unchanged

. A summar y o f

th e impact s o f

th e origina l standar dca nb e foun di n th e preambl e t o th e propose dstandar drevision s (5 0 F R1182)

. Publi c Participatio n Prio r t o proposa l o f

revision s t o th e standard , intereste dpartie s wer e advise db y publi c notic e i n th e Federa l Registe r (4 9 F R26807 , Jun e 29,1984 ) of a meetin g o f

th e Nationa l Ai r

Pollutio n Contro l Technique s Advisor y Committe e (NAPCTAC ) t o discus s th e revision s t o th e V C standar d recommende dfo r

proposal

. Thi s meetin g wa s hel do n Augus t

30,1984

. Th e meetin g wa s ope nt o th e publi c an deac h attende e wa s give n a nopportunit y t o commen t o nth e revise dstandar d recommende dfo r

proposal

. Th e revise dstandar dwa s propose di n th e Federa l Registe r

o n Januar y 9,1985

. Th e publi c commen t

perio dwa s fro m Januar y 9,193 5 t o Marc h25,1985

. A tota l of 1 6 commen t

letter s wer e received

. Industr y representative s submitte dmos t

o f th e commen t

letters

. Als o commentin g wer e representative s o f th e U.S

. Congress , aStat e Legislature , aStat e ai r

pollutio nagenc y an da n environmenta l group
. Th e comment s hav e bee n considere dcarefull y and , wher e determine dt o b e appropriat e b y EPA , change s hav e bee nmad e t o th e propose drevisions t o th e standard

. Significan t

Comment s Sinc e Proposa l Mos t o f th e commen t

letter s containe d multipl e comments

. I n general , th e comment s supporte ddi e propose d administrativ e an dclarifyin g revisions

. A detaile ddiscussio nc f th e comment s an dresponse s car ; b e foun di n th e SI D fo r th e promulgate dstandard , whic hi s reference di nth e ADDRESSE S sectio n o f thi s preamble

. Th e comment s an d response s i nth e BI

D serv e a s th e basi s fo r th e change s tha t

hav e bee nmad e t o th e revise dstandar dbetwee n proposa l an dpromulgation

.

. Almos t al l commenter s addresse dth e propose drevision s t o th e relief valv e discharg e standard

. Althoug hman y c f th e commenter s agree dwiti i th e actio n t o reforma t

th e standard , severa l commenter s objecte dt c variou s aspect s o f th e discharg e limits

. Base do n consideratio nof

thes e comments , EP A decide dno t

t o promulgat e th e propose d revisio nt o th e relis f

valv e discharg e standard

. Th e comment s o n thi s an d othe r propose drevision s ar e addresse d i n detai l i n th e BI D fo r

th e promulgate d standar dan di nsummar y i n th e nex t sectio n o f

thi s prec.mblc

. On e commente r

requsste d reconsideratio nof

th e withdrawa l o f

th e amendment s t o th s V C standar dwhic h wer e propose di n 1977

. Thi s petitio nfo r reconsideratio n wa s base do n objection s t o th e Agency' s us e o f dat a o ncost s an deconomi c impact s i n th e decisio nt o withdra w th e propose d amendments , an dt o th e Agency' s determinatio no f

th e technologica l basi s o f th e standard

. Th e commenter s state d tha t th e EPA' s action s i nwithdrawin g th e propose damendment s wer e inconsisten t

wit hth e requirement s o f sectio n 11 2 o f

th e Clea n Ai r

Act

. A s discusse dfurthe r

i nthi s preamble , th e Agenc y i s denyin g th e petitio nfo r reconsideration

. Propose dRevision s t o Relie f Valv e Discharg e Standar d Th e EP A ha s decide dno t t o promulgat e revision s t c th e relie f valv e discharg e standar dpropose di n th e Januar y 9,1985 , Federa l Registe r notice

. Th e revision s woul dhav e establishe da differen t typ e o f numerica l limi t

fo r relie f valv e discharges

. Th e decisio n t o retai nth e origina l relie f valv e discharg e standar dwa s mad e afte r considerin g th e revision s i n ligh t

o f publi c comment s an dothe r

findings

. Althoug hman y publi c comment s fsvore dth e propose d revisions , other s oppose dth e change

. I nP.1 9

Bgiste r / Vol

. 5'. , Nn

. :.3 S /

buasday , Septembe r 30 , 198 6 /

Rule s an dRegulation s particular , severa l commenter s expresse dconcer n tha t preventabl e relie f valv e discharge s woul db e allowe dunde r

th e revisedstandar den d tha t th e performanc e allowe dunda r th s revise dstandar dcoul db e inconsisten t wit htha t allowe dunde r

th e origin? ! standard

. Othe r

comment s expresse d concer n tha t

th e revise dstandar d include dn o mechanis mfo r regulatin g ver y larg e relie f

valv e discharges

. Th s basi s fo r th e statemen t

tha t alarg e Agenc y resourc e commitmen t i s require dfo r

enforcin g th e relie f

valv s discharg e standar dwa s als o questioned

. A s aresul t

o f thes e comments , EP A reviewe dth e basi s fo r

th e recommendation s tha t

le dt o th e decisio n t o propos e t o reforma t th e standard

. First , a s discusse di n th e Federa l Registe r

notic e proposin g revision s t o th e relief

valv e discharg e standar d(5 0 FR1187) , th e revie w o f th e standar dconducte dbetwee n 198 0 an d 198 2 foun dtha t

th e existin g standar d resulte di n asignifican t commitmen t

c ? Agenc y resource s t o th e revie w an d evaluatio n of

discharge s o f

V C fro m relie f valves

. Becaus e th e existin g standar dallow s onl y "emergency' " discharge s o f

V C fro mrelief

valve s (i.s. , th e relie f valv e discharg e coul dno t b s avoide db y takin g preventativ e measures) , ever y discharg e mus t b e evaluate dindividuall y t o determir. s whethe r th e owne r

o r operato r o f th e facilit y ha s implemente dth e measure s necessar y t o preven t

tha t relie f valv e discharge

. Durin g th e 4 t o 5 year s sinc e th e revie w stud y wa s conducted , th e enforcemen t

o f th e relie f

valv e discharg e standar dha s bee n mad e mor e efficient

. Thi s i s du e i n larg e par t t o experienc e establishe di n enforcin g th e standard

. A s aresult , EP A enforcemen t perccnns ! conside r implementatio n o f

thi s standar dt o b e muc hles s resourc e an d labo r intensive

. A secon dconclusio n fro mth e 1S3 C t c 198 2 stud y wa s tha t

industr y di dno t hav e aclea r

understandin g o f

whe t th s relie f valv e discharg e standar drequired. an dwha t measure s the y neede dt c implemen t

i n orde r t o compl y wit hth a standard

. Durin g th e 4 t o 5 year s sine s th e revie w study , anumbe r o f enforcemen t

action s hav e bee n taker

. agains t individua l plant s fo r

violation s o f th e standards

. Thos e action s hav e culminate di n consen t

decree s whic h incorporat e requirements fo r remedial action s t o preven t

furthe r relie f valv e discharges

. Th e provision s o f thes e consen t decree s hav e no t

onl y reduced th e numbe r

o f relie f valv e discha-gs e e t specifi c plants , bu t

the y hav e als o serve da s guideline s i n determinin g th s type s o f measure s appropriat e fo:. ' ribdnbxv: ; th s discharges

. Becaus e o f thos s tw o dsvsiopments , EP A conclude d tha t th s origina l finding s o f th e revie w stud y ar e n o longe r

vali dan dshoul dno t be

- th s basi s o f

Erevisio n t o th e forma t ci'ih e relvi'valv s discharg e standard

. Th s decisio nt o retain th e existin g r e hei'vo l .' s bischarg s standar da s apar t c f i s Gtr~.do.r

dfc r V C emission s i s furthe r supporte db y tw o additiona l advantage s tha t

th s existin g standar d b ; o ove r th s prepens e revisions

. First , lb s sxistii" , standar dprovide s t'-.ai c " preventabl e relie f valv e cb'acliErgen a.r

e subjec t t o enforcemen t ection

. bbb.de:. ' i s propose drevisions , wbic hwoul dhav s -.bowe dasmal l numbs! ' ci ' discharge. " ps r yea r whethe r preventabl e c r

not , i t io possibl e tha t

a plan t coul dexperienc e preventabl e discharge s -'.n

dstil l h s i n complianc e wit hih e standard

. A o pointe dou t i n publi c sc:r.rnsnts , i t

i s theoreticall y possibl e tha i dischs'gs s resultin g fro m g'-oc o r-svger.s s coul dg o unpenalize d undo: , tb e revision s t c th e standard

. Th e 'J.?A di d: :o ; inten dthi s effec t i nth e proposed , revisions , "h e retentio n o f th e s.uBbr. g robe: : valv s diocharg e standar d allow s bb-"

A t o ecnnbiu s th e curren t onicrssiTisn t

approach

. Sscor.d , tb e existin g relie f valv e discharg e standar dprovide s abette r nscharbsir

. for regulating larg e relief valv s discharges

. Th e propose drevisio n woul dhav s allowe dacertai n numbe r o f rslis f valv s dischargs s pe r

year , withou t regar dt o tb o siz e o r

duratio n o f

th e discharge , dfonssqusntiy , a s lon g a s th e

32S3 3 ' r e withi nth e numsrioa l limit s of

th s propose d revision s t c tb o standard , ther e wer e n o mechanism s i n th s standar dt o enforc e contro l ell 'di e amoun t

c f V C discharge d t o th s atmosphere

. Unde r th e existin g relie f valv s discharg e standard , bows-vsr , tb e duratio n an dsiz e o f th e discharg e ar s factor s ; n determinin g th e severit y o f

a
. violatio n o f

th e standard

. A s a03BV.lt

, a
. plen t owne r o r operato r '.'.E D agreate r

incentiv s unde r

th e curren t standar dfor

takin g aotio n t o reduc e th e quantit y of

e discharge

. I n sun : mary , 3? A i s no t promulgatin g th e revisions t c th s relief valv e discharg e standar dwhic hwer e propose di n th s Januar y 9,1985 , Federa l !b3g"ots'. ' notice

. Thi s decisio n wa s reachsd

. afte r

consideratio no f

publi c comment s receivedo n th e proposal , an d afts r arevie w o: ? th s basi s fo r th e decisio n t c reformat

th e standard

. ireca.us s thi s rsvis w revealedtha t th e bu.rd.s n o nAgenc y resources ha s diminishe da s sxpsrisne e wit hth e implementatio n o f

th s standar d bicrsased , and

. tha t

understandin g o f

th e "rovisioi D o f

th e existin g standar do n th e par t o f industr y shoul db e clearer , th e necessit y fo r

revisin g th e forma t

o f th e relie f valv e discharg e standar di s n o longe r apparent

. Th e existin g standar d als o ha s th e advantage s o f penalizin g al l preventabl e relie f

valv e discharges , providin g bette r

regulatio no f

larg e volum e relie f

valv e discharges , an d promotin g continuit y i n th e ongoin g enforcemen t

o f th e standard

. I nsom e instances , i t

ma y b e possibl e fo r aplan t operato r

t o contai narelie f valv e discharg e an dt o ven t i t t o a contro l device

. Wher e thi s ca n b e don e withou t exceedin g th e exhaus t ga s emissio nlimi t

q f 1 0 ppmv , EP A conclude dtha t

thi s approac hshoul db e encourage dand , therefore , th e discharg e shoul db e exemp t

fro mth e relief

valv e discharg e standard

. Ventin g th e discharg e throug hacontro l devic e ca n resul t i n a99. 9 percen t

reductio n i n th e V C conten t

o f th e relie f

valv e discharg e withou t interferin g wit hth e contro l o f V C emission s i nexhaus t gase s whic h ar e als o vente dthroug hth e contro l device

. Althoug hcomplianc e wit hth e 1 0 ppm v standar dwoul dexemp t th e discharg e fro mth e relief valv e discharg e standard , exceedin g th e 1 0 ppm v standar dwoul db e considere dbot ha violatio no f

th e 1 0 ppm v standar dan do f th e relie f valv e discharg e standard

. Denia l o f Petitio nFo r

Reconsideratio n Th e NRD C an dED Fpetitione dEP A t o reconside r

th e decisio nt o withdra w th e 197 7 propose drevision s t o th e V C standard

. Th e criteri afo r grantin g suc h apetitio nare : (1 ) Th e petitio n mus t b e base do ninformatio n tha t wa s no t an d coul dno t reasonabl y hav e bee n presente ddurin g th e origina l rulemaking ; an d(2 ) th e petitio n mus t provid e substantia l suppor t fo r th e argumen t tha t th e challenge dactio n shoul db e changed

. See Denia l o f Petitio nt o Revis e NSP S fo r Stationar y Ga s Turbines , 4 5 F

R8165 3 (Decembe r

1 , 1980)

. A s describe dbelow , thi s petitio n fail s t o mee t

eithe r criterion , an di t

i s therefore , denied

. Consideration of

Petition Th e NRDC/ED Fpetitio n fo r reconsideratio no f

th e withdrawa l wa s base do n fou r

mai n premises

. Firs t NRDC/ED Fobjecte dt o th e EPA' s announcemen t

o f th e withdrawa l o f

th e propose damendment s a s afina l action , withou t bein g precede db y anotic e whic h propose dth e withdrawa l an dallowe d fo r publi c commen t

o n th e action

. Second , NRDC/ED Fobjecte dt o th e influenc e o f

cos t consideration s i n th e decisio nt o withdra w th e propose d amendment , statin g tha t th e balancin g o f cost s an dbenefit s i n th e settin g of th e V C standar di s contrar y t o th eP.2 0

Federa l Registe r

/Vol

. 51 , No

. 18 9 / Tuesday , Septembe r 30 , 198 6 /

Rule s an dRegulation s 

### MSD7
requirement s of

Sectio n 11 2 of

th e Clea n Ai r Act

. Third , NRDC/ED Ftoo k issu e wit hwha t

i t too k t o b e th e EPA' s assumptio n tha t

Sectio n 11 2 of

th e Clea n Ai r Ac t establishe s arequiremen t tha t a leve l of contro l mus t

hav e bee n "consistentl y achieved " inth e pas t in orde r t o for mth e basi s of

th e standard

. Finally

. NRDC/ED Fstate dtha t th e EPA' s decision s o n specifi c portion s o f th e propose damendment s wer e i n conflic t wit hth e evidenc e o n thos e issues

. In th e firs t

objection , NRDC/ED Fstat e tha t th e propose damendment s t o th e 197 7 V C standar dshoul dno t b e withdraw n becaus e n o notic e of suc h withdrawa l ha dbee n publishe dan d ther e ha dbee n n o opportunit y for publi c commen t o n th e withdrawal

. Durin g th e 8 year s whic hhav e elapse dsinc e th e proposa l of

thos e amendments , ther e ha s bee n ampl e opportunit y afforde dfo r publi c commen t

an dinpu t

o n th e amendment s an dthei r

withdrawal

. Th e amendments , thei r

protentia l consequences , an dth e decision s tha t th e Agenc y migh t

tak e wit hregar dt o the m wer e al l befor e th e public

. Specifically , NRD C an dED Freceive ddraf t document s relatin g t o th e rulemakin g distribute dprio r

t o th e NAPCTA C meeting

. Finally , NRD C di dno t giv e an y supportin g rational e for believin g tha t furthe r opportunit y for

commen t

woul d yiel dan y relevan t

ne w informatio n o r arguments

. Therefore , EP A doe s no t believ e tha t

additiona l tim e o r

provisio n for receivin g furthe r

publi c comment s coul dhav e bee n eithe r

necessar y o r helpfu l for

th e resolutio nof

th e issue s involvin g th e propose damendment s t o th e V C standard

. Th e secon dissu e raise db y NRDC / ED Finvolve s th e inclusio n of cos t consideratio n i n th e EPA' s rulemakin g deliberation s unde r

Sectio n112

. Th e NRDC/ED Fmaintain s tha t th e languag e o f Sectio n 11 2 whic hrequire s th e standar dt o b e se t

a t aleve l whic h provide s a n "ampl e margi n of safety " t o th e publi c preclude s consideratio n of th e cost s of control

. I n th e EPA' s judgment , th e V C standar dprotect s th e publi c healt hwit ha n ampl e margi n of safet y withi n th e meanin g of

Sectio n 112 , an d EP A ma y conside r

cos t an dfeasiblit y i n settin g th e standard

. Th e EP A view s wer e explaine di n th e 1975-7 6 V C rulemaking

. Th e NRDC/ED Fprovide d n o ne w informatio n o n thi s issue

. Th e NRDC/EDF' s thir dobjectio nwa s th e EP A wa s incorrec t

i n statin g tha t

a leve l of contro l mus t

b e "consistentl y achieved " i n orde r

t o formth e basi s o f th e standard

. Specifically , NRDC/ED F pointe dt o th e languag e i n th e Federa l Registe r notic e tha t

"1 0 ppm v represent s th e lowes t leve l o f contro l whic hha s bee n consistentl y achieved " a s indicatin g tha t

EPA wa s applyin g suc h requiremen t

in evaluatin g alternativ e exhaus t ga s requirements

. However , th e basi s for EPA' s selectio nof

1 0 ppm v a s th e V C standar dfor

exhaus t ga s emission s i s tha t

thi s leve l of

contro l i s th e lowes t

achievabl e emissio n limi t attainabl e o nanever-to-be-exceede d basis

. Althoug h5 ppm v ma y b e achieve db y som e system s ove r a limite dtim e period , th e existin g dat a indicat e th e thi s leve l o f contro l canno t b e maintaine dove r

along-term , never
to-be-exceede dbasis , a s require db y th e standards

. I n additio nt o bein g achievabl e o n aconsistent , long-ter m basis , th e 1 0 ppm v standar dwa s als o determine db y EP A t o provid e th e publi c wit hth e ampl e margi n o f safet y require d b y sectio n112

. Therefore , EP A beleive s tha t th e standar dsatisfie s th e requirement s o f

sectio n112

. Th e fina l point s raise db y NRDC/ED F i n suppor t

of th e petitio nfo r reconsideratio naddresse dthre e specifi c provision s of

th e propose damendment s whic hwer e withdrawn

. Th e NRDC/ED F state dtha t

th e withdrawa l of

thes e provision s wa s i n conflic t wit hth e evidenc e befor e th e Agency

. Th e firs t specifi c portio nof

th e standar d addresse di nth e petitio ni s th e withdrawa l o f

th e propose d5 ppm v emissio nlimi t

fo r exhaus t ga s emissio n i n favo r of th e existin g 1 0 ppm v emissio nlimit

. Th e NRDC/ED Fstate d tha t th e evidenc e i n th e recor dsupport s afindin g tha t

th e 5 ppm v limi t

i s achievabl e b y ne w sources , an db y existin g source s withi n 3 year s of promulgation

. Th e petitio n als o pointe d t o th e mor e stringen t

emissio n limi t

no t b e foregone

. Th e EP A decide dt o maintai n th e 1 0 ppm v emissio nlimi t

for exhaus t ga s emissio n fo r

thre e primar y reasons
. First , a s state dabove , th e 1 0 ppm v emissio nlimi t

ha s bee n determine dt o b e consistentl y achievabl e b y industry , wherea s th e 5 ppm v emissio n limi t canno t b e consistentl y achieved

. Second , eve nthoug hth e limi t o n maximu memission s of

V C i s se t

a t 1 0 ppmv , th e averag e an dmos t short-ter m emission s wil l b e considerabl y lowe r tha n thi s level

. Third , lowerin g th e emissio nlimi t

o n maximu memissio n rate s t o 5 ppm v woul dno t significantl y reduc e th e averag e emissions , an d therefore , adoptin g th e lowe r standar d wa s determine db y th e Agenc y no t t o hav e asignifican t

impac t o nemission s of V C or , accordingly , o n publi c healt h risks

. Th e petitio n fo r

reconsideratio n presente dn o ne w evidenc e relevan t t o th e Agency' s decisio n t o withdra w th e propose d5 ppm v emissio n limit

. Th e secon ddecisio n addresse db y th e petitio n for

reconsideratio n a s conflictin g wit hth e considere devidenc e i s th e withdrawa l of

th e 5 ppm v emissio n limi t

for oxychlorinatio n vents

. Th e petitio npoint s t o astatemen t i n th e 197 7 proposa l tha t

thi s emissio n limi t coul db e attaine dbase do nth e us e of oxyge n a s afee dmateria l rathe r tha n air , an dmaintain s tha t

n o discussio n o r evidenc e wer e presente dwhic hwoul d justif y withdrawa l of

thi s proposal

. I n th e Federa l Registe r

(5 0 F R1185) , evidenc e wa s presente db y th e Agenc y supportin g th e conclusio ntha t mor e stringen t contro l of

emission s fro m oxychlorinatio n vent s wa s unnecessary
. First , n o ne w technologica l control s hav e bee ndevelope dwhic har e applicabl e t o thes e vents

. Second , th e cost s o f incineratin g oxychlorinatio n ven t stream s wer e reevaluate dan d determined , a s before , t o b e unreasonabl e compare dt o th e smal l reductio n i nV C emissions

. An dfinally , wit hth e possibl e exceptio n of on e plant , n o ne w EDC/V C plant s wit h oxychlorinatio nreactor s ar e expecte dt o b e constructed , an dan y tha t ma y b e constructe dwil l b e adequatel y regulate d b y th e requirement s of

ne w sourc e revie w regulations

. N o ne w informatio n wa s presente di n th e petitio n for reconsideratio nrelevan t t o th e decisio n

• t o retai nth e existin g oxychlorinatio n ven t standard

. Th e thir ddecisio nwhic hwa s addresse di nth e petitio n fo r reconsideratio na s conflictin g wit hth e considere devidenc e i s th e withdrawa l o f th e proposa l t o lowe r

th e residua l V C limi t for ne w dispersio n resin s fro m 2,00 0 ppm v t o 50 0 ppmv , an dth e limi t fo r othe r ne w resin s fro m40 0 ppm v t o 10 0 ppmv
. Th e petitio nstate s tha t existin g facilitie s ar e currentl y meetin g th e lowe r

limits , an dtha t

bot hne w an d existin g facilitie s coul db e brough t int o complianc e wit hth e mor e stringen t limit s b y usin g th e equipmen t an d procedure s currentl y use db y th e leadin g facilities

. Th e EP A withdre w th e propose dmor e stringen t strippin g leve l requirement s fo r tw o mai n reasons
. Th e firs t i s tha t th e natur e of PV C productio n make s i t difficult t o distinguis h"new " fro m"old " resins

. Resi n composition s ar e adjuste d routinely , an dcompletel y "new " resin s ar e rarely , if

ever , made

. Second , EP A conclude dtha t

ther e i s n o improve d technolog y whic hwoul dprovid e th e basi s fo r mor e stringen t

strippin g requirement s fo r

al l resins

. Th e technologie s whic har e effectiv e fo r specifi c resin s ma y no t

b e effectiv e fo rP.2 1

34SS3 B eglstsiI V c
othe r resins

. Th e consequenc e o f establishin g amor e stringen t standar d woul db e tha t

certai n hard-to-stri p resin s coul dn o longe r

b e produced , ir

. th e EPA' s opinion , suc haresul t woul d b e a n unwarrante deconomi c impac t whic hi s unnecessar y t o provid e a n ampl e margi n o f

safet y fo r

publi c hselth

. N o ne w relevan t

informatio n wa s presente di n th e petitio n fo r reconsideration

. Administrativ e Th e docke t

i s a n organize dan d complet e fil e o f

al l th e informatio n considere db y EP A i n th e developmen t of thi s rulemaking

. Th e docke t i s a dynami c file , sinc e materia l i s adde d throughou t

th e rulemakin g development

. Th e docketin g syste mi s intende dt o allo w member s o f

th e publi c an d industrie s involve dt o identif y an d locat e document s s o tha t the y ca n effectivel y participat e i n th e rulemakin g process
. Alon g wit hth e statemen t o f basi s an dpurpos e o f

th e propose dan d promulgate dstandard s an dEP A response s t o significan t comments , th s content s of

th e docket , excep t

fo r interagenc y revie w materials , wil l serv e a s th e recor di n cas e of judicia l review [sectio n 307(d)(7)(A)]

. Th e effectiv e dat e of

thes e revision s i s Septembe r

30,1988

. Sectio n 11 2 of th e Clea n Ai r

Ac t provide s tha t

nationa i emissio n standard s fo r

hazardou s si r pollutant s becom e effectiv e upo n promulgatio n an dappl y t o al l existin g an dne w sources
. A s prescribe db y sectio n 112 , promulgatio n o f

thi s standar dwa s precede db y th e Administrator' s listin g of V C unde r

sectio n 11 2 o f

th e Ac t c n Decembe r

24,197 5 (4 0 F

R59477)

. Z

n accordanc e wit hsectio n 11 7 o f th e Act , publicatio n o f

thes e promulgate d revision s wa s precede db y consultatio n wit happropriat e advisor y committoss , independen t

experts , an dFedera l department s an dagencies

. Informatio n collectio n requirement s associate dwit hthi s revisedregulatio n (thos e include di n 4

C CF RPar t SI , Subpar t A an dSubpar t

F) hav e bee n approve db y th e Offic e o f Managsmsn t an dBudge t

(OMB ) unde r

th e provision s of th e Paperwor k

Reductio n Ac t

of 1EEC , 4 4 U.S.C

. 350 1 et

seq., an dhav e beer , assigne dOM B contro l numbe r 01S3

. Th s revise dstandar di s estimate dt o resul t i n apaperwor k

burde n of

abou t 3 5 person-year s whic hi s roughl y th s sam s a s th e origina l standard

. Unde r Executiv e Orde r

12291 , S? A i s require dt o judg e whethe r aregulatio n :'

o a"majo r rule " an dtherefor e subjec t t o certai n requirement s o f th e Ordsr

. Th s EP A ha s determine dtha t th e revised regulatio n woul dresult

i n non s o f

th e a-!-,,

.

Ssc t fin d Tn e osr ; c o r oba : les s OOO : pri c sta r aov : sm p :nrt : ma r rule

. : "3 0 eeenem' o sfhbet s sa t

forthi n fon ' o ' tb e Crds ^ a s ground s for r g aregulation t o b e a "majo r rule. " revise.. : regulation ir

. no t majo r use : [Z]bb'.tionwid s annua l dia::c: : ,:s::t3 , inc'ubfo g capita l gs s revv y fro mtb e standar dtota l tba u gvt n viih'cr ; [Z]th e standar d no
. or.•;-.:
. ar^ajo r

increas e i n : s rr o : odvotfor

. acs" :v

, an d(3 ) th e bard s :b ; ne t

caus e s'gnifican t •s e effort s o n dcrnsr.M c competition , oyver: , vvostrent , productivity , rave r o
. o o noet'ti o i i n foreig n tsts

. Tr e Zl- A be s submitte dthi s •nabin g to Z-Y3 unde r

Executiv e Crdsr'KS V
rr'~ r , rs.,,-.

. „ r„., . ---} -*0{j_! J •:.,„. , advers e revet s •••IV '

spe:::fio;b! y btsguistory : instance s w ar e nossib b
imnrets , abegv'utcr y "Flexibility Analysi s 1 = Exr'biiit y Ac t o f 198 0 tificatio n o f

potentiall y of Federa l regulation s -.es s entities

. Th e Ac t iira s th s oompletio n o f

a ihilit y Analysi s i nthos e smal l busines s impact s ~aus o thi n revise d s n o advars e economi c

' ! •

rncac t :r- a onbres

. bee n conducted

.

e provision s o f

5 U.S.C

. sertif y Cha t th e propose d e asignifican t

economi c Uentia ! numbe r

o f smal l

Ai r P L

rnr.enc
.

AcJin:nis'~j".!<

cr "'b

. Tib ' *

' ' bv b .bbb'ibb. '

rircrmble.T :

i(K l£ I bLVjebey , Septembe r 30 , 198 6 /

Rule s an dRegulation s produc t containin g viny l chlorid e o r polyviny l chlorid e bu t

whic hha s no t bee n discharge dt o awastewate r treatmen t

proces s o r

discharge d untreate da s wastewater

. Gasholde r sea l wate r

i s no t inproces s wastewate r unti l i t i s remove dfro mth e gasholde r * * * * * (1 ) "I nviny l chlorid e service " mean s tha t apiec e o f

equipmen t

eithe r contain s o r contact s aliqui dtha t

i s aleas t

1 0 percen t viny l chlorid e b y weigh t o r aga s tha t i s a t leas t 1 0 percen t

b y volum e viny l chlorid e a s determine daccordin g t o th e provision s o f

§ 61.67(h)

. Th e provision s of

§ 61.67(h ) als o specif

y ho w t o determin e tha t

apiec e o f

equipmen t

i s no t i n viny l chlorid e service

. Fo r th e purpose s of

thi s subpart , thi s definitio n mus t b e use di n plac e o f

th e definitio nof "i n VHA Pservice " i n Subpar t V o f thi s part

. * * * * * (o ) "Ethylen e dichlorid e purification " include s an y par t

o f th e proces s o f ethylen e dichlorid e productio n whic h follow s ethylen e dichlorid e formation , excludin g produc t

storag e followin g th e fina l finishin g column

. (p ) "Viny l chlorid e purification " incude s an y par t

of th e proces s o f

viny l chlorid e productio nwhic hfollow s viny l chlorid e formation

. 4 ft ft ft ft (v ) "Relie f

valve " mean s eac h pressur e relie f

devic e includin g pressur e relie f valves , ruptur e disk s an dothe r pressur e relie f

system s use dt o protec t proces s component s fro moverpressur e conditions

. "Relie f

valve " doe s no t includ e polymerizatio nshortsto p systems , referigerate dwate r system s o r contro l valve s o r

othe r device s use dt o contro l flo w t o a n incinerato r o r othe r ai r pollutio ncontro l device

. (w ) "Leak " mean s an y o f severa l event s tha t

indicat e interruptio n o f confinemen t

o f viny l chlorid e withi n proces s equipment

. Leak s includ e event s regulate dunde r

Subpar t V o f thi s par t suc has : (1 ) A ninstrumen t readin g o f 10,00 0 pp mo r

greate r measur e accordin g t o Metho d2 1 (se e Appendi x A o f 4 0 CF R Par t 60) ; (2 ) indication s of

liqui d dripping ; (3 ) asenso r

detectio n o f

failur e o f asea l system , failur e o f abarrie r

flui d system , o r

both ; an d(4 ) detectabl e emission s a s indicate db y a ninstrumen t readin g o f

greate r tha n 50 0 pp mabov e backgroun dfo r

equipmen t

designate d fo r n o detectabl e emission s measure d accordin g t o Tes t

Metho d2 1 (se e Appendi x A o f

4 0 CFRPar t

60)

. Leak s als o includ e event s regulate dunde r § 61.65(b)(8)(i ) fo r

detectio no f

ambien t concentration s i nexces s of backgroun d •:r,Cs:'::

. Cl Tbb. l Par t

SI

. nor
. control , Asbestos , rylliurn , Hazardou s bereury

. Viny l chloride

. 'eirfc r 24 , ""3

.

C.kriA'-A v /-J15! , 74K- , / " ?,. Ssetior

. revisin g par 1 ; andb y addi i (y) , an d(a] t :

b'b'"!S.TbY, ' TTS b bbb b [1AHAP3000 S MR

reu s es t forthi nth e : C7bi 'Pnt

3 " i s amende da s rerity citatio nfo r

Par t 6 1 : rea da o follows: Irsn

. :C1 , "2

. '.14,116 , 301 , r.3 r.mardc d;«2 U.S.C

. 7401 , 2'..S I i s a—ende db y raph s Q, ;i) , (o ) an d(p ) paragraph s (v) , (w) , (x) , *ea da s follows:

w i r viny l o b s wastewater " mean s an y bvin g vrnufacturin g o r re s int o direc t

contac t :r!d. s o ' polyviny l chlorid e tb e productio n o r

us e o f bb , intermediat e product , ot , by-product , o r

wast eP.2 2

Federa l Registe r

/ Vol

. 51 , No

. 18 9 /

Tuesday , Septembe r 30 , 198 6 /

Rule s an dRegulation s 3490 9

concentration

. A relie f

valv e discharg e i s no t aleak

. (x ) "Exhaus t

gas " mean s an y offga s (th e constituent s of

whic hma y consis t o f an y fluids , eithe r

a s aliqui dand/o r .gas ) discharge ddirectl y o r ultimatel y t o th e atmospher e tha t

wa s initiall y containe di n o r

wa s i n direc t

contac t wit hth e equipmen t

fo r whic hexhaus t ga s limit s ar e prescribe di n § 61.6 2 (a ) an d(b) ; § 61.63(a) ; § 61.6 4 (a)(1) , (a)(2) , (b) , (c) , an d(d) ; § 61.65(b ) (l)(ii)

. (b)(2) , (b)(5) , (b)(6)(ii ) an d(b)(9)(h)

. (y ) "Relie f

valv e discharge " mean s an y nonlea k

discharg e throug harelie f valve

. "Relie f

valv e discharge " doe s no t includ e discharge s ducte dt o acontro l syste mfro mwhic hth e concentratio n of viny l chlorid e i n th e exhaus t gase s doe s no t excee d1 0 pp m(averag e for 3-hou r period) , o r

equivalen t

a s provide di n § 61.66

. (z ) "3-hou r

period " mean s an y thre e consecutiv e 1-hou r

period s (eac hhou r commencin g o n th e hour)

. 3

. Sectio n 61.6 2 i s amende db y revisin g paragraph s (a ) an d(b ) t o rea d a s follows : § 61.6 2 Emissio n standar d fo r ethylen e dichlorid e plants

. (a ) Ethylene dichloride purification. Th e concentratio n of

viny l chlorid e i n eac hexhaus t

ga s strea mfro man y equipmen t

use di n ethylen e dichlorid e purificatio n i s no t

t o excee d1 0 pp m (averag e fo r

3-hou r period) , excep t

a s provide di n § 61.65(a)

. Thi s requiremen t doe s no t preclud e combinin g of exhaus t ga s stream s provide dth e combine d stea mi s ducte dthroug hacontro l syste mfro mwhic hth e concentratio n of viny l chlorid e i n th e exhaus t gase s doe s no t excee d1 0 ppm , o r

equivalen t

a s provide di n § 61.66

. Thi s requiremen t doe s no t appl y t o equipmen t

tha t ha s bee n opened , i s ou t

of operation , an d me t th e requiremen t

i n § 61.65(b)(6)(i ) befor e bein g opened

. (b ) Oxychlorination reactor. Excep t a s provide di n § 61.65(a) , emission s o f viny l chlorid e t o th e atmospher e fro meac h oxychlorinatio n reacto r ar e no t t o excee d0. 2 g/k g (0.000 2 lb/lb ) (averag e fo r 3-hou r period ) of

th e 10 0 percen t ethylen e dichlorid e produc t fro mth e oxychlorinatio n process
. 4

. Sectio n 61.6 3 i s revise dt o rea da s follows : § 61.6 3 Emissio n standar d fo r vinv l chlorid e plants

. A n owne r

o r operato r o f aviny l chlorid e plan t

shal l compl y wit hth e requirement s of

thi s sectio n an d§ 61.65

. (a ) Viny l chlorid e formatio n an d purification : Th e concentratio n o f viny l chlorid e i n eac hexhaus t ga s strea m fro man y equipmen t use di n viny l chlorid e formatio nand/o r purificatio n i s no t t o excee d1 0 pp m(averag e fo r 3-hou r period) , excep t

a s provide di n§ 61.65(a)

. Thi s requiremen t

doe s no t

preclud e combinin g of

exhaus t ga s stream s provide dth e combine dstea mi s ducte d throug hacontro l syste mfro mwhic hth e concentratio n of

viny l chlorid e i nth e exhaus t gase s doe s no t

excee d1 0 ppm , o r equivalen t

a s provide di n § 61.66

. Thi s requiremen t

doe s no t

appl y t o equipmen t

tha t ha s bee nopened , i s ou t o f operation , an dme t

th e requiremen t

i n § 61.65(b)(6)(i ) befor e bein g opened

. 5

. Sectio n61.6 4 i s amende db y revisin g paragraph s (a) , (b) , (c ) an d(d ) t o rea da s follows : § 61.6 4 Emissio n standar d fo r polyviny l chlorid e plants

.

* ft * ft 4 (a ) Reactor. Th e followin g requirement s appl y t o reactors : (1 ) Th e concentratio nof viny l chlorid e i n eac hexhaus t

ga s strea mfro meac h reacto r i s no t t o excee d1 0 pp m(averag e fo r 3-hou r period) , excep t

a s provide di n paragrap h(a)(2 ) o f

thi s sectio n an d § 61.65(a)

. (2 ) Th e reacto r

openin g los s fro meac h reacto r i s no t t o excee d0.0 2 g viny l chloride/k g (0.0000 2 l b viny l chloride/lb ) o f polyviny l chlorid e product , excep t a s provide di n paragraph s (f)(1 ) an d(f)(2 ) of thi s section , wit hth e produc t determine do n adr y solid s basis

. Thi s requiremen t

doe s no t

appl y t o prepolymerizatio nreactor s i n th e bul k process
. Thi s requiremen t doe s appl y t o postpolymerizatio nreactor s i nth e bul k process , wher e th e produc t mean s th e gros s produc t

o f prepolymerizatio n an d postpolymerization

. (3 ) Manua l ven t

valv e discharge

. Excep t fo r a n emergenc y manua l ven t valv e discharge , ther e i s t o b e n o discharg e t o th e atmospher e fro man y manua l ven t

valv e o napolyviny l chlorid e reacto r

i n viny l chlorid e service

. A nemergenc y manua l ven t valv e discharg e mean s adischarg e t o th e atmospher e whic hcoul dno t hav e bee n avoide db y takin g measure s t o preven t th e discharge

. Withi n1 0 day s of an y discharg e t o th e atmospher e fro m an y manua l ven t

valve , th e owne r

o r operato r of th e sourc e fro mwhic hth e discharg e occur s shal l submi t t o th e Administrato r

arepor t i nwritin g containin g informatio n o n th e source , natur e an dcaus e o f

th e discharge , th e dat e an dtim e o f

th e discharge , th e approximat e tota l viny l chlorid e los s durin g th e discharge , th e metho duse d fo r determinin g th e viny l chlorid e los s (th e calculatio nof

th e viny l chlorid e loss) , th e actio n tha t

wa s take n t o preven t th e discharge , an dmeasure s adopte dt o preven t

futur e discharges

. (b ) Stripper. Th e concentratio n of vinl y chlorid e i neac hexhaus t ga s strea mfro meac hstrippe r i s no t t o excee d1 0 pp m(averag e fo r 3-hou r period) , excep t

a s provide di n § 61.65(a)

. Thi s requiremen t

doe s no t

appl y t o equipmen t

tha t ha s bee nopened , i s ou t of operation , an dme t

th e requirementio n § 61.65(b)(6)(i ) befor e bein g opened

. (c ) Mixing, weighing, and holding containers. Th e concentratio n o f viny l chlorid e i n eac hexhaus t ga s strea m fro meac hmixing , weighing , o r holdin g containe r

i n viny l chlorid e servic e whic h precede s th e strippe r

(o r th e reacto r

i f th e plan t ha s n o stripper ) i nth e plan t proces s flo w i s no t

t o excee d1 0 pp m (averag e fo r

3-hou r period) , excep t

a s provide di n§ 61.65(a)

. Thi s requiremen t doe s no t appl y t o equipmen t

tha t ha s bee n opened , i s ou t

o f operation , an d me t th e requiremen t

i n § 61.65(b)(6)(i ) befor e bein g opened

. (d ) Monomer

recovery system. Th e concentratio no f

viny l chlorid e i n eac h exhaus t ga s strea mfro meac hmonome r recover y syste mi s no t

t o excee d1 0 pp m (averag e fo r

3-hou r period) , excep t

a s provide di n § 61.65(a)

. Thi s requiremen t doe s no t appl y t o equipmen t

tha t ha s bee n opened , i s ou t

o f operation , an d me t th e requiremen t

i n§ 81.65(b)(6)(i ) befor e bein g opened

. « * « « « 6

. B y revisin g paragrap h(e ) introductor y text , an daddin g paragraph s (e)(3 ) an d(f ) t o § 61.6 4 t o rea da s follows : § 61.6 4 Emissio n standar d fo r polyviny l chlorid e plants

. * « « « « (e ) Sources following the stripper(s). Th e followin g requirement s appl y t o emission s o f

viny l chlorid e t o th e atmospher e fro mth e combinatio n o f al l source s followin g th e stripper(s ) [o r th e reactor(s ) i

f th e plan t

ha s n o stripper(s) ] i nth e plan t

proces s flo w includin g bu t no t limite dto , centrifuges , concentrators , blen dtanks , filters , dryers , conveyo r

ai r discharges , baggers , storag e containers , an dinproces s wastewater , excep t

a s provide di n paragrap h(f

) o f thi s section : (1 ) * * * (2 ) * * * (3 ) Th e provision s o f

thi s paragrap h appl y a t al l time s includin g whe n off

specificatio no r

othe r type s o f resin s ar e made

. (f ) Reacto r use da s stripper

. Whe n a nonbul k resi n reacto r

i s use da s a strippe r thi s paragrap hma y b e applie d i nlie u o f § 61.6 4 (a)(2 ) an d(e)(1):P.2 3

sreii ite? I

Vd

. 5 1 IB S /

Tussday , Septembe r 30 , 198 6 /

Rule s an dRegulation s (1 ) Th aweighte daverag e emission: ; of viny l chlorid e fro mreacto r openin g los s an dal l source s followin g th e reacto r use da s astrippe r

fro mal l grads s o f polyviny l chlorid e resi n strippe di n tb s reacto r o n eac hcalenda r

da y ma y re t exceed : (i ) 2.0 2 g/k g (0.0020 2 lb/lb ) o f polyviny l chlorid e produc t fo r dispersio n polyviny l chlorid s resins , excludin g late x resins , wit hth e produc t determine do n adr y solid s basis

. (ii ) 0.4 2 g/k g (0.0004 2 lb/lb ) o f polyviny l chlorid e produc t fo r al l othe r polyviny l chlorid e resins , includin g Iats x resins , wit hth e produc t determine do n a dr y solid s basis

. 7

. Sectio n 61.8 5 i s amende db y revisin g paragraph s (a) , (b)(1)(h ) En d (b)(2 ) t o rea da s follows : §61.6 5 Emissio n otarifed ! fo r ottsylon s dichloride , viny l cf!!ori«2s , en d poljfv'.ny t chlorid e plants

. (a ) Relief valve discharge. Excep t fo r a n emergenc y relie f

discharge , ther e i 3 t o b e n o discharg e t o th e atmospher e fro man y relie f

valv e o n an y equipmen t i n viny l chlorid e service

. A n emergenc y relie f discharg e mean s adischarg e whic hcoul dno t

hav e bee navoide db y takin g measure s t o preven t th e discharge

. Withi n 1 0 day s o f an y relief valv e discharge , th e owne r o r operato r o f th e sourc e fro mwhic hth e relie f valv s discharg e occur s shal l submi t t o di s Administrato r

arepor t i n writin g containin g informatio n o n th e source , natur e an dcaus e o f

th e discharga , th e dat e an dtim e of

th e discharge , th e approximat e tota l viny l chlorid e los s durin g th e discharge , th e metho duss d fo r determinin g th s viny l chlorid e los s (th e calculatio n o f

th e viny l chlorid e loss) , th e actio n tha t

wa s take n t o preven t th e discharge , an dmeasure s adopte dt o preven t

futur e discharges

. (b ) * * * (1 ) * * * (i ) * * * (ii ) An y viny l chlorid e removedfro ma loadin g o r

unloadin g lin e i n accordanc e wit hparagrap h(b)(l)(i ) o f thi s sectio n i s t o b e ducte dthroug hacontro l syste m fro mwhic hth e concentratio n o f viny l chlorid e i n th e exhaus t

gase s doe s ne t excee d1 0 pp m(averag e fo r 3-hou r period) , o r

equivalen t

a s provide di n § 61.66

. (2 ) Slip gauges. Durin g loadin g o r unloadin g operations , th e viny l chlorid s emission s fro meac hsli p gaug e i n viny l chlorid e servic e ar e t o b e minimize db y ductin g an y viny l chlorid e discharge d fro mth e sli p gaug e throug hacontro l syste mfro mwhic hth e concentratio n c f viny l chlorid e i n th e exhaus t gase s dos s no t excee d1 0 pp m(averag e fo r 3-hou r psiicd] , o r

equivalen t

a s provide di n i : 31.53

.

i: 0 ft tt G

. by re risin g paragraph s (b)(3) , (b)(4) , (bp) , y){Z], [j]j), (b](8) , (b)(9)(h) , an d [e ] t o g J1.C 5 a s follows: zrd fo r ethylen e an d polyviny l cC?b."r,:\uo : \
A nowne r

o r operato r o f a n ethylen e dichlcrids , viny l chloride , and/o r polyviny l chlorid e plan t shal l compl y wil htb o requirement::

- o f thi s section

. (a ) * ' * (b ] * - * (1 ) * ** (3 ) Le akeg s fro mpump , compressor , an dagitato r

ssals : (i ] tlatutinn pumps. Viny l chlorid e Emission s fro mseal s o n al l rotatin g pump s i n viny l chlorid e servic e ar e t o b e minimize db y Installin g sealles s pumps , pump s wit hdoubl e mechanica l seal s o r equivalen t

a s provide di n § 61.66

. I f doubl s mechanica l ssal s ar e used , viny l chlorid e emission s fro mth e seal s ar e t o b s minimias db y maintainin g th e pressur e betwss n th s tw o seal s s o tha t an y Isa k tha t occur s i s int o th e pump ; b y ductin g an y viny l chlorid e betwee nth e tw o seal s throug he contro l syste mfro m whic hth e concentratio no f viny l chlorid e i nth s exhaus t

gase s doe s no t sxcsec i 1Z

ppm ; o r equivalen t

a s provide di n § 31.33

. Complianc e wit hth e provider s of

4 0 CFI t Par t 6 1 Subpar t

V demonstrate s complianc e wit hth e provision s of

thi s paragraph

. (ii ) Reciprocating pumps. Viny l chlorid s omission s fro mseal s o nal l reciprocatin g pump s i n viny l chlorid e ssrvic s ar e t o b s minimize db y installin g doubl s outboar dssals , o r equivalen t

a s provide di n §31.33

. If

doubl e outboar d ssal s ar o used , viny l chlorid e emission s fro mth e ssal s ar e t o b s minimize db y maintainin g th s pressur e betwee nth e tw o ssal s s o tha t

an y lea k

tha t occur s i s int o th apump ; b y ductin g an y viny l chlorid e betwee n th s tw o seal s throug h acontro l syste mfro mwhic hth e concentratio no f

viny l chlorid e i nth e sxhaue t gase s dos s no t

excee d1 0 ppm ; o r equivalen t

a s provide di n§61.66

. Complianc e wit hth e provision s o f 4 0 CF RPar t 3 1 Subpar t

V demonstrate s compliance s wit hth o provision s o f thi s paragraph

. (iii ) Rotating compressor. Viny l chlorid e emission s fro mseal s o nal l rotatin g compressor s i nviny l chlorid e servic e ar e t o b s minimize db y installin g compressor s wit hdoubl e mechanica l seals , o r equit'alsn t

s s provide di n §31.53

. If doubl e mechanica l seal s ar e used , viny l chlorid e omission s fro mth e rai s ar e
. o o s minimise

. d b y maintainin g th e pressur e betwee n th e

tw o seal s s o tha t

an y lea k

tha t occur s i s int o th e compressor ; b y ductin g an y viny l chlorid e betwee n th e tw o seal s throug hacontro l syste mfro mwhic hth e concentratio nof

viny l chlorid e i n th e exhaus t gase s doe s no t

excee d1 0 ppm ; o r equivalen t

a s provide di n §61.66

. Complianc e wit hth e provision s o f 4 0 CF RPar t 6 1 Subpar t

V demonstrate s complianc e wit hth e provision s o f thi s paragraph

. (iv ) Reciprocating compressors. Viny l chlorid e emission s fro mseal s o n al l reciprocatin g compressor s i n viny l chlorid e servic e ar e t o b e minimize db y installin g doubl e outboar dseals , o r equivalen t

a s provide di n§ 61.66

. If doubl e outboar dseal s ar e used , viny l chlorid e emission s fro mth e seal s ar e t o b e minimize db y maintainin g th e pressur e betwee n th e tw o seal s s o tha t an y lea k tha t occur s i s int o th e compressor ; b y ductin g an y viny l chlorid e betwee n th e tw o seal s throug h acontro l syste mfro mwhic h concentratio n o f

viny l chlorid e i n th e exhaus t gase s doe s no t

excee d1 0 ppm ; o r equivalen t

a s provide di n§ 61.66

. Complianc e wit hth e provision s o f 4 0 CFRPar t 6 1 Subpar t

V demonstrate s complianc e wit hth e provision s of thi s paragraph

. (v ) Agitator. Viny l chlorid e emission s fro mseal s o nal l agitator s i n viny l chlorid e servic e ar e t o b e minimize db y installin g agitator s wit hdoubl e mechanica l seals , o r

equivalen t

a s provide di n§ 61.66

. If

doubl e mechanica l seal s ar e used , viny l chlorid e emission s fro mth e seal s ar e t o b e minimize db y maintainin g th e pressur e betwee nth e tw o seal s s o tha t an y lea k tha t occur s i s int o th e agitate d vessel ; b y ductin g an y viny l chlorid e betwee n th e tw o seal s throug hacontro l syste mfro mwhic hth e concentratio n o f viny l chlorid e i nth e exhaus t gase s doe s no t excee d1 0 ppm ; o r

equivalen t

a s provide di n § 61.66

. (4 ) Z,eoA s from relief

valves. Viny l chlorid e emission s du e t o leak s fro m eac hrelie f

valv e o nequipmen t

i n viny l chlorid e servic e shal l compl y wit h § 61.242- 4 of

Subpar t V o f thi s part

. (5 ) Manual

venting of

gases. Excep t

a s provide di n§ 61.64(a)(3) , al l gase s whic h ar e manuall y vente dfro mequipmen t i n vinl y chlorid e servic e ar e t o b e ducte d throug hacontro l syste mfro mwhic hth e concentratio no f

viny l chlorid e i n th e exhaus t gase s doe s no t

excee d1 0 pp m (averag e fo r

3-hou r period) ; o r equivalen t

a s provide di n § 61.66

. (6 ) Opening of

equipment. Viny l chlorid e emission s fro mopenin g o f equipmen t

(includin g prepolymerizatio n reactor s use di nth e manufactur e of bul kP.2 4

Federa l Registe r

/ Vol

. 51 , No

. 18 9 /

Tuesday

. Septembe r 30 , 198 S /

Rule s an dRegulation s 2491 1

resin s an dloadin g o r

unloadin g line s tha t ar e no t opene dt o th e atmospher e afte r eac hloadin g o r

unloadin g operation ) ar e t o b e minimize da s follows : (i ) Befor e openin g an y equipmen t fo r an y reason , th e quantit y o f viny l chlorid e whic hi s containe dtherei ni s t o b e reduce dt o a n amoun t whic hoccupie s avolum e o f

n o mor e tha n 2. 0 percen t of th e equipment' s containmen t volum e o r 0.095 0 cubi c meter s (2 5 gallons) , whicheve r

i s larger , a t

standar d temperatur e an dpressure
. (ii ) An y viny l chlorid e remove dfro m th e equipmen t

i n accordanc e wit h paragrap h(b)(6)(i ) o f

thi s sectio ni s t o b e ducte dthroug hacontro l syste mfro m whic hth e concentratio n o f viny l chlorid e i n th e exhaus t

gase s doe s no t excee d1 0 pp m(averag e fo r 3-hou r period) ; o r

equivalen t

a s provide di n § 61.66

. (7 ) Samples. Unuse dportion s o f sample s containin g a t

leas t 1 0 percen t b y weigh t

viny l chlorid e ar e t o b e returne dt o th e proces s o r destroye di na contro l devic e fro mwhic hconcentratio n of viny l chlorid e i n th e exhaus t ga s doe s no t excee d1 0 pp m(averag e fo r 3-hou r period ) o r

equivalen t

a s provide di n § 61.66

. Samplin g technique s ar e t o b e suc htha t sampl e container s i n viny l chlorid e servic e ar e purge dint o aclose d proces s system

. Complianc e wit hth e provision s of

4 0 CF RPar t 6 1 Subpar t

V demonstrate s complianc e wit hth e provision s of

thi s paragraph

. (8 ) Leak detection and

elimination. Viny l chlorid e emission s du e t o leak s fro mequipmen t

i n viny l chlorid e servic e ar e t o b e minimize da s follows : (i ) A reliabl e an daccurat e viny l chlorid e monitorin g syste mshal l b e operate dfo r

detectio n of

majo r leak s an didentificatio n o f

th e genera l are ao f th e plan t wher e alea k

i s located

. A viny l chlorid e monitorin g syste mmean s adevic e whic hobtain s ai r sample s fro m on e o r mor e point s o n acontinuou s sequentia l basi s an danalyze s th e sample s wit hga s chromatograph y or , if th e owne r

o r operato r assume s tha t

al l hydrocarbon s measure dar e viny l chloride , wit hinfrare d spectrophotometry , flam e io n detection , o r a n equivalen t

o r alternativ e method

. Th e viny l chlorid e monitorin g syste m shal l b e operate daccordin g t o a progra mdevelope db y th e plan t owne r o r operator

. Th e owne r

o r operato r shal l submi t adescriptio n o f

th e progra mt o th e Administrato r

withi n 4 5 day s of

th e effectiv e dat e of

thes e regulations , unles s awaive r

of complianc e i s grante d unde r § 61.11 , o r

th e progra mha s bee n approve dan dth e Administrato r doe s no t reques t arevie w o f

th e program
. Approva l o f aprogra mwil l b e grante d b y th e Administrato r

provide dh e finds : (A ) Th e locatio n an dnumbe r o f point s t o b e monitore dan dth s frequenc y o f monitorin g provide dfo r i n th e progra m ar e acceptabl e whe nthe y ar e compare d wit hth e numbe r

o f piece s o f

equipmen t i n viny l chlorid e servic e an dsiz e an d physica l layou t

o f th e plant

. (B ) I t contain s adefinitio n o f lea k whic hi s acceptabl e whe n compare d wit hth e backgroun dconcentration s o f viny l chlorid e i nth e area s o f th e plan t

t o b e monitore db y th e viny l chlorid e monitorin g system

. Measurement s o f backgroun dconcentration s o f viny l chlorid e i n th e area s o f th e plan t

t o b e monitore db y th e viny l chlorid e monitorin g syste mar e t o b e include d wit hth e descriptio n o f

th e program
. Th e definitio n o f

lea k fo r agive n plan t

ma y var y amon g th e differen t area s withi n th e plan t an di s als o t o chang e ove r tim 3 a s backgroun dconcentration s i nth e plan t ar e reduced. (C ) I t contain s a nacceptabl e pla n o f actio n t o b e take nwhe n alea k i s detected

. (D ) I t provide s fo r

a nacceptabl e calibratio nan dmaintenanc e schedul e fo r th e viny l chlorid e monitorin g syste m an dportabl e hydrocarbo n detector

. Fo r th e viny l chlorid e monitorin g system , a dail y spa n chec k

i s t o b e conducte dwit h aconcentratio no f

viny l chlorid e equa l t o th e concentratio ndefine da s alea k accordin g t o paragrap h(b)(8)(i)(B ) o f thi s section

. Th e calibratio ni s t o b e don e wit heither : (7 ) A calibratio nga s mixtur e prepare d fro mth e gase s specifie di n section s 5.2.1

. an d5.2.2

. o f

Tes t Metho d10 8 an d i n accordanc e wit hsectio n 7. 1 o f Tes t Metho d103 , o r [2]A calibratio n ga s cylinde r standar dcontainin g th e appropriat e concentratio n o f

viny l chloride

. Th e ga s compositio n o f

th e calibratio n ga s cylinde r standar di s t o hav e bee n certifie db y th e manufacturer

. Th e manufacture r

mus t hav e recommende da maximu mshel f

lif e fo r eac hcylinde r

s o tha t th e concentratio n doe s no t chang e greate r tha n± 5 percen t

fro mth e certifie dvalue

. Th e dat e o f ga s cylinde r preparation , certifie dviny l chlorid e concentration , an drecommende d maximu msel f

lif e mus t hav e bee n affixe dt o th e cylinde r

befor e shipmen t fro mth e manufacture r

t o th e buyer

. If

a ga s chromatograp hi s use da s th e viny l chlorid e monitorin g system , thes e ga s mixture s ma y b e directl y use dt o prepar e achromatograp hcalibratio n curv e a s describe di n sectio n7. 3 o f Tes t Metho d108

. Th e requirement s i nsectio n 5.2.3.1

. an d5.2.3.2

. of

Tes t Metho d10 6 fo r certificatio no f

cylinde r standard s an dfo r establishmen t

an dverificatio n o f calibratio nstandard s ar e t o b e followed , (ii ) Fo r eac hproces s uni t

subjec t t o thi s subpart , aforma l lea k detectio n an d repai r progra mshal l b e implemente d consisten t

wit hSubpar t

V o f thi s part , excep t a s provide di nparagrap h (b)(8)(iii ) o f

thi s section

. Thi s progra mi s t o b e implemente dwithi n 9 0 day s o f th e effectiv e dat e o f

thes e regulations , unles s awaive r

o f complieno e i s grante d unde r §61.11

. Excep t

a s provide di n paragrap h(b)(8)(ii)(E ) of thi s section , a n owne r o r operato r shal l b e exemp t

fro m § 61.242-l(d) , § 61.242- 7 (a) , (b) , en d(c) „ § 61.246 , an d§ 61.24 7 o f Subpar t V o f thi s par t fo r an y proces s uni t

i n whic h th e percentag e o f

leakin g valve s i s demonstrate dt o b e les s thsi n 2S. percent , a s determine' di naccordanc e wit hth e following : (A ) A performanc e tes t

a s specifie di n paragrap h(b)(8)(ii)(B ) o f thi s sectio n shal l b e conducte dinitiall y withi n 9 0 day s o f th e effectiv e dat e o f

thes e regulations , annually , an da t tims s
. ; requeste db y th e Administrator

. (B ) Fo r eac hperformanc e test , ai minimu mo f

20 0 o r 9 0 percent , whicheve r

i s less , o f

th e tota l valve s i n VO C servic e (a s define di n § 60.48 1 o f Subpar t V V o f Par t 60 ) withi n th s proces s uni t

shal l b e randoml y selecte d an dmonitore dwithi n1 wee k b y th e method s specifie di n § 61.245(b ) c f thi s part

. If a ninstrumen t

readin g of

lOvOO O pp mo r greate r i s measured , alea k

i s detected

. Th e lea k

percentag e shal l b e determine db y dividin g th s numbe r o f valve s i nVO C servic e for whic hleak s ar e detecte db y th e numbe r of teste d valve s i nVO C service , (C ) If alea k i s detected , i t

shd Lb e repaire di n accordanc e wit hQ fil.242-7 (d ) an d(e ) of

Subpar t V o f thi s part

. (D ) Th e result s o f

th o performanc e tes J shal l b e submitte di nwritin g t o th e Administrato r

i nth e firs t

quarterl y ! repor t followin g th e performanc e tos t a s par t o f th e reportin g requirements o f

. § 6 1 JO

. ! (E ) An y proces s uni t

i nivhic hth s ] percentag e o f

leakin g valvs s i s foun dt o • b e greate r

tha n2. 0 percen t

accordin g t o th e performanc e tes t

prescribe di n paragrap h(b)(8)(ii)(B ) o f thi s sectio n mus t compl y wit hal l provision s o f Subpar t V o f thi s par t withi n 9 0 days

. (iii ) Open-ende dvalve s o r line s locate do n multipl e servic e proces s line s whic hoperat e i n viny l chlorid e servic e les s tha n1 0 percen t

o f th e tim e ar e exemp t fro mth e requirement s o f § 61.242- 6 o f

Subpar t V , provide dth e open-ende dvalve s o r

line s ar e addresse di n uhe monitorin g syste m require db y paragrap h(b)(8)(i ) o f thi s ' section

. Th e Administrato r ma y appl y

### sgistei r / Vol

. 51 , Nc

. 189 /

Tuesday , Septembe r

30 , 198 6 /

Rule s an dRegulation s

thi s exemptio n t o othe r existin g open
ende dvalve s o r

line s tha t

ar e demonstrate dt o requir e significan t retrofi t cos t t o compl y wit hth s requirement s o f

§ 61.242- 6 o f

Subpar t V

. ft ft

* l i ir (9 ) * * * (ii ) An y viny l chlorid e remove dfro m th e inproces s wastewate r i n accordanc e wit hparagrap h(b)(9)(i ) o f thi s sectio n i s t o b e ducte dthroug hacontro l syste m fro mwhic hth e concentratio n o f viny l chlorid e i n th e exhaus t

gase s dos s no t excee d1 0 pp m(averag e fo r 3-hou r period) ; o r

equivalen t

a s provide di n § 61.66

. tt tt

t, n tt (c ) Th e requirement s i n paragraph s (b)(1) , (b)(2) , (b)(5) , (b)(6) , {b){7} an d (b)(8 ) o f thi s sectio n ar e t o b e incorporate dint o astandar doperatin g procedure , an dmad e availabl e upo n reques t fo r inspectio n b y th e Administrator

. Th e standar doperatin g procedur e i s t o includ e provision s fo r measurin g th e viny l chlorid s i n equipmen t

4.7 5 m 3 (1,25 0 gal ) i n volum e fo r whic ha n emissio n limi t i s prescribe d i n § 61.65(b)(6)(i ) afte r

openin g th e equipmen t

an dusin g Tes t

Metho d103 , e portabl e hydrocarbo n detector , o r c n alternativ e method

. Th e metho do f measuremen t

i s t o mee t

th e requirements i n § 61.67(g)(5](i)(A ) o r (g)(5)(i)(B)

. 9

. Sectio n 61.6 6 i s revise dt o reada s follows : § 81.S S Equivalen t

Gqaiipjr.ozr

t an d procedures

. Upo n writte n applicatio n fro ma n owne r o r operator , th e Administrato r ma y approv e us e o f

equipmen t

o r procedure s whic hhav e bee n demonstrate dt o hi s satisfactio n t o b e equivalen t

i n term s of

reducin g viny l chlorid e emission s t o th e atmospher e t o thos e prescribe dfo r

complianc e wit hs. specifi c paragrap ho f

thi s subpart

. 10

. B y revisin g paragraoh s (f) , (g)(l)(i) , (g)(2) , (g)(3 ) introductor y text , (g)(3](i)

. (g)(3)(iii) , (g)(5 ) introductor y text , an db y (g)(5)(ii ) addin g paragraph s (g)(6 ) an d(h j i n § 61.6 7 a s follows : § S1.S 7 (Emission tests

. * a ti& ti (f ) Th e owne r

o r operato r shal l retain a t th e plan t

an dmak e available , upo n request , fo r

inspectio nb y th s Administrator , fo r

aminimu mo f

3 years , record s o f

emissio n tes t

result s an d othe r dat aneede dt o determin e emissions

. (g ) * * * (1 ) * * * (i ) Fo r eac hrun , on e sampl e i s t c b e collected

. Th e samplin g sit e i s t o b s e t leas t tw o stac k

o r duc t diamstsr s downstrea man don e hal f diamete r upstrea mfro man y flo w disturbanc e suc ha s abend , expansion , contraction , o r visibl e flame. Fo r

arectangula r

cros s sectio n a n equivalen t

diamete r

i s t o b e determine dfro mth e followin g equation : equivalen t diameter= 2 (length) (width) / length- f width Th e samplin g poin t

i n th e duc t

i s t o b e a t th e csntroi dof

th e cros s section

. Th e sampl e i s t o b e extracte da t arat e proportiona l t o th e ga s velocit y a t th e samplin g point

. Th e sampl e i s t o contai n aminimu mvolum e o f

5 0 liter s correcte d t o standar dcondition s an di s t o b e take n ove r

aperio da s clos e t o 1 hou r a s practicable

. ft it

iift ft (2 ) Tes t Metho d10 7 o r

Metho d60 1 (incorporate db y referenc e a s specifie d i n § 31.13 ) i s t o b e use dt o determin e th e concsntratio n o f

viny l chlorid e i n eac h inproces s wastewate r

strea mfo r

whic h e n emissio nlimi t

i s prescribe di n i ) 61.S5(b)(9)(i)

. (3 ) Whe nastrippin g operatio n i s use d t o attai n th e emissio nlimit s i n § 61.6 4 (s ) an d(f) , emission s ar e t o b e determine dusin g Tes t

Metho d10 7 a s follows : (i ) Th s numbe r

o f stripper s (o r reactors uss da s strippers ) an dsample s en dth e typs s an dgrade s of resi nt o b e samplsd

. ar e t o b e determine db y th e Administrato r

fo r eac hindividua l plan t a t th s tim s o f

th e tes t base do n th e plant' s onsration

. (ii) " * ' ° (iii ) Th e correspondin g quantit y o f materia l processe db y eac hstrippe r (o r reactor use da s astripper ) i s t o b e determine do n adr y solid s basi s an db y ametho dsubmitte dt o an dapprove db y th e Administrator

. (iv ) " * " (4 ) * * ° (5 ) Th e reactor

openin g los s fo r

whic h a n emissio n limi t

i s prescribe di n § 31.64(a)(2 ) i s t o b e determined

. Th e numbe r o f reactors fo r

whic hth e determinatio ni s t o b e mad e i s t o b e specifie dby th e Administrato r fo r eac h individua l plan t

a t th e tim e o f

th e determinatio n base do n th e plant' s onsration

. 

### j q a 

### *

., (ii ) A calculatio nbase do nth e numbe r o f evacuations , th e vacuu minvolved , an dth s volum e o f

ga s i n th e reacto r

i s hereb y approve db y th e Administrato r a s a n alternativ e metho dfo r determinin g reacto r

openin g los s fo r postpolymsrizatio n reactor s i n th e manufactur e o f

bul k resins

. Calculatio n method s bass do ntechnique s othe r tha n repeate devacuatio n o f th e reacto r

ma y b s approve db y th e Administrato r fo r determinin g reactor

openin g los s fo r postpolymerizatio nreactor s i n th e manufactur e o f

bul k resins

. (6 ) Fo r areacto r

tha t i s use da s a stripper , th e emission s o f viny l chlorid e fro mreacto r

openin g los s an dal l source s followin g th e reacto r use da s a strippe r fo r whic ha nemissio n limi t i s prescribe di n § 61.64(f

) ar e t o b e determined

. Th e numbe r o f reactor s fo r whic hth e determinatio ni s t o b e mad e i s t o b e specifie db y th e Administrato r for eac hindividua l plan t

a t th e tim e o f

th e determinatio nbase do nth e plant' s operation

. (i ) Fo r eac hbatc hstrippe di n th e reactor , th e followin g measurement s ar e t o b e made : (A ) Th e concentratio n(ppm ) o f viny l chlorid e i nresi n afte r

stripping , measure daccordin g t o paragrap h(g)(3 ) o f thi s section ; (B ) Th e reacto r

vacuu m(mmHg ) a t en do f stri p fro mplan t

instrument ; an d (C ) Th e reacto r

temperatur e (°C ) a t en do f stri p fro mplan t

instrument

. (ii ) Fo r eac hbatc hstrippe di n th e reactor , th e followin g informatio ni s t o b e determined : (A ) Th e vapo r

pressur e (mmHg ) o f wate r i n th e reacto r

a t en do f stri p fro m th e followin g table :

Reacto r vapo r temper * atur e C O

4 0 4 1 4 2 4 3 4 4 4 5 4 6 4 7 4 8 4 9 S O 5 1 5 2 5 3 5 4 5 5 5 6 5 7 5 8 5 9 6 0 6 1 H, 0 vapo r pres sur e (m m Hg )
55. 3 58. 3 61. 5 64. 8 68. 3 71. 9 75. 6 79. 6 83. 7 88. 0 92. 5 97. 2 102. 1 107. 2 112. 5 118. 0 123. 8 129. 8 136. 1 142. 6 149. 4 156. 4 Reacto r temperatur e C O

6 2 6 3 6 4 6 5 6 6 6 7 6 8 6 9 7 0 7 1 7 2 7 3 7 4

•• 5 7 6 7 7 7 8 7 9 8 0 8 1 8 2 6 3 H, 0 vapo r pressur e (m m Hg )
163. B 171. 4 179. 3 187. 5 196. 1 205. 0 214. 2 223. 7 233. 7 243. 9 254. 6 265. 7 277. 2 289. 1 301. 4 314. 1 327. 3 341. 0 355. 1 369. 7 384. 9 400. 6 Reacto r temper * atur o C O

84 8 5 6 6 8 7 6 8 8 9 9 0 9 1 0 2 9 3 9 4 9 5 9 6 9 7 9 8 9 9 10 0 H, 0
sur e (m m Hg )

416 8 433 6 450. 9 468. 7 487. 1 506. 1 525. 8 546. 0 567. 0 588. 6 610. 9 633. 9 657. 6 682. 1 707. 3 733. 2 760. 0

(B ) Th e partia l pressur e (mmHg ) o f viny l chlorid e i n reacto r a t en dof stri p fro mth e followin g equation : PPVC = 760-RV-VP W where : PPV C = partia l pressur e o

f viny l chloride , in m mH g 760=atmospheri c pressur e at 0 *C, inm

mH g R V = absolut e valu e o

f reacto r vacuum , in m mH g VPW=vapo r

pressur e o

f water , in m

mH g (C ) Th e reacto r

vapo r spac e volum e (m 3 ) a t en do f stri p fro mth e followin g equation :P.2 6

Federa l Registe r

/ Vol

. 51

. No

. 18 9 /

Tuesday

. Septembe r 30 , 198 6 /

Rule s an dRegulation s 3491 3

RVSV=RC-WV

- -

PVC W 1,40 0
where : RVSV=reacto r

vapo r spac e volume , i

n m s RC=reacto r

capacity , in m 3 WV=volum e o

f wate r in reacto r

fromrecipe , in m 3 PVCW=dry weigh

t o f polyviny l chlorid e in reacto r fro mrecipe , in k

g

where : C= g viny l chloride/k g polyviny l chlorid e produc t PPMVC=concentratio n o

f viny l chlorid e in resi n afte r stripping , in pp

m 10 " 3 = conversio n facto r

fo r pp m PPVC=partia l pressur e o

f viny l chlorid e determine daccordin g to paragrap h (g)(6){ii)(B ) o

f thi s section , in m

mH g RVSV=reacto r

vapo r spac e volum

e determine daccordin g to paragrap h (gX6K-i)(C ) o f thi s section , inm 3 l,00 2 = ideal ga s constan t

in g

—'K/m m Hg—m

3 fo r viny l chlorid e PVCW=dry weigh

t o f polyviny l chlorid e in reacto r fro mrecipe , in k

g 273=conversio n factor

fo r ' C t o ' K RT=reacto r

temperature , in ' C (h)(1 ) Eac hpiec e of

equipmen t

withi n aproces s uni t

tha t ca nreasonabl y contai n equipmen t

i n viny l chlorid e servic e i s presume dt o b e i n viny l chlorid e servic e unles s a n owne r o r operato r demonstrate s tha t

th e piec e o f equipmen t

i s no t i n viny l chlorid e service

. Fo r

apiec e o f

equipmen t

t o b e considere dno t

i n viny l chlorid e service , i t mus t b e determine dtha t

th e percen t viny l chlorid e conten t

ca n b e reasonabl y expecte dno t

t o excee d1 0 percen t

b y weigh t fo r liqui dstream s o r

containe d liqui dvolume s an d1 0 percen t b y volum e fo r

ga s stream s o r

containe dga s volumes , whic hals o include s ga s volume s abov e liqui dstream s o r containe dliqui dvolumes

. Fo r purpose s o f determinin g th e percen t viny l chlorid e conten t o f th e proces s flui dtha t

i s containe di n o r

contact s equipment , procedure s tha t

confor mt o th e method s describe di n AST M Metho dD-226 7 (incorporate db y referenc e a s specifie d i n § 61.18 ) shal l b e used

. (2)(i ) A n owne r

o r operato r ma y us e engineerin g judgmen t

rathe r tha n th e procedure s i n paragrap h(h)(1 ) o f thi s sectio n t o demonstrat e tha t th e percen t viny l chlorid e conten t

doe s no t

excee d 1 0 percen t

b y weigh t

fo r liqui dstream s an d1 0 percen t

b y volum e fo r

ga s streams , provide dtha t

th e engineerin g judgmen t

demonstrate s tha t

th e viny l 1,400=typical density o f polyviny l chloride , in kg/m 3 (iii ) Fo r eac hbatc hstrippe di n th e reactor , th e combine dreacto r openin g los s an demission s fro mal l source s followin g th e reacto r

use da s astrippe r i s t o b e determine dusin g th e followin g equation :

C=(PPMVC)(10- 3 ) + (PPVC)(RVSV)(1,002 ) (PVCW ) (273+RT )

chlorid e conten t

clearl y doe s no t

excee d 1 0 percent

. Whe n a n owne r o r operato r an dth e Administrato r

d o no t agre e o n whethe r apiec e o f

equipmen t

i s no t i n viny l chlorid s service , however , th e procedure s i nparagrap h(h)(1 ) of thi s sectio nshal l b e use dt o resolv e th e disagreement

. (ii ) I f a nowne r

o r operato r determine s tha t apiac e o f

equipmen t

i s i nviny l chlorid e service , th e determinatio n ca n b e revise donl y afte r

followin g th e procedure s i nparagrap h(h)(1 ) o f thi s section

. (3 ) Sample s use di n determinin g th e percen t viny l chlorid e conten t

shal l b e representativ e o f

th e proces s flui dtha t i s containe di n o r

contact s th e equipment

. 11

. B y addin g paragraph s (d) , (e ) an d (f ) t o § 61.6 8 a s follows : § 61.6 8 Emissio n monitoring

. 

### * * * * * (d ) Whe nexhaus t

gas(es) , havin g emissio nlimit s tha t

ar e subjec t

t o th e requiremen t

o f paragrap h(a ) of

thi s section , ar e emitte dt o th e atmospher e withou t passin g throug hth e contro l syste man drequire dviny l chlorid e monitorin g system , th e viny l chlorid e conten t of th e emissio nshal l b e calculate d(i nunit s o f

eac happlicabl e emissio nlimit ) b y bes t

practica l engineerin g judgmen t

base do nth e discharg e duratio n an dknow n V C concentration s i nth e affecte d equipmen t

a s determine di n accordanc e wit h§ 61.67(h ) o r

othe r acceptabl e method

. (e ) Fo r eac h3-hou r

period , th e viny l chlorid e conten t

o f emission s subjec t

t o th e requirement s of

paragraph s (a ) an d (d ) of thi s sectio nshal l b e average d (weighte daccordin g t o th e proportio n o f tim e tha t emission s wer e continuousl y monitore dan dtha t

emission s bypasse d th e continuou s monitor ) fo r purpose s o f reportin g exces s emission s unde r § 61.70(c)(1)

. (f ) Fo r eac hviny l chlorid e emissio n t o th e atmospher e determine di n accordanc e wit hparagrap h(e ) o f thi s sectio n t o b e i n exces s o f th e applicabl e emissio n limits , th e owne r o r operato r shal l recor dth e identit y o f th e source(s) , th e date , time , an dduratio n o f th e exces s emission , th e caus e of th e exces s emission , an dth e approximat e tota l viny l chlorid e los s durin g th e exces s emission , an dth e metho duse dfo r determinin g th e viny l chlorid e loss

. Thi s informatio n shal l b e retaine dan dmad e availabl e fo r

inspectio n b y th e Administrato r

a s require db y § 61.71(a)

. 12

. I n§ 61.7 0 b y revisin g th e sectio n titl e fro m"Semiannua l report " t o "Reporting" , an db y revisin g paragraph s (a) , (c)(1) , (c)(2 ) introductor y text ! (c)(2)(iii) , (c)(2)(iv) , (c)(2)(v) , (c)(2)(vi ) introductor y text , an d(e)(3 ) an dals o b y addin g (c)(4 ) t o rea da s follows : § 61.7 0 Rsportjij:

- (a)(1 ) Th e owne r

o r operato r o f an y sourc e t o whic hthi s subpar t applie s shal l submi t

t o th e Administrato r

o n Marc h15 , Jun e 15 , Septembe r 15 , an d Decembe r

1 5 o f eac hyea r

arepor t i n writin g containin g th s informatio n require db y thi o ssction

. Th e firs t report i s t o b e submitts dfollowin g th e first ful l 3-mont hreportin g perio dafte r th e initia l repor t i s submitted

. (2 ) I nth e cas e o f

a n existin g source , th e approve dreportin g schedul e shal l b e used

. I naddition , quarterl y report s shal l b e submitte dexactl y 3 month s followin g tiie curren t

reportin g dates

. « * e *

• a (c) * * * (1 ) Th e owne r

o r operato r shal l includ e i n th s repor t

arecordo f

th e viny l chlorid e conten t

of emission s fo r eac h3-hou r

perio ddurin g whic haverag e emission s ar e i n exces s o f th e emissio n limit s i n § 61.8 2 (a ) o r

(b)

. § 61.63(a) , o r § 61.6 4 (a)(1) , (b) , (c) , o r (d) , o r durin g whic haverag e emission s ar e i n exces s o f th e emissio nlimit s specifie dfo r an y contro l syste mt o whic hreacto r emission s ar e require dt o b e ducte di n § 61.64(a)(2 ) o r

t o whic hfugitiv e emission s ar e require dt o b e ducte di n § 61.65(b)(i)(ii) , (b)(2) , (b)(5) , (b)(6)fii)

. o r (b)(9)(ii)

. Th e numbe r

o f 3-hou r period s fo r whic haverag e emission s wer e determine ddurin g th areportin g perio d shal l b e reported

. I

f emission s i n exces s o f th e emissio n limit s ar e no t detected , th e repor t

shal l conta mastatemen t tha t n o exces s emission s hav e bee n detected

. Th e emission s ar e t o b e determine di n accordanc e wit h§ 61.68(e)

. (2 ) I npolyviny l chlorid e plant s fo r whic hastrippin g operatio n i s use dt o attai nth e emissio nleve l prescribe di n § 61.64(e) , th e owne r

o r operato r shall

. j 

# 13491 4 Federa l Registe r / Vol

. 51 , No

. 18 9 /

Tuesday , Septembe r 30 , 198 6 /

Rule s an dRegulation s
includ e i n th e repor t

arecor do f

th e viny l chlorid e conten t

i n th e polyviny l chlorid e resin

. (i ) * * * (ii) * • * (iii ) Th e viny l chlorid e conten t i n eac h sampl e i s t o b e determine db y Tes t Metho d10 7 a s prescribe di n § 61.67(g)(3)

. (iv ) [Reserved ] (v ) Th e repor t

t o th e Administrato r

b y th e owne r

o r operato r i s t o includ e a

n 2 Pc i M a i = l Pc i Mc i + Pc s Mos- f

Q T where : A=24-hou r

averag e concentratio no

f typ e T resi n in ppm(dr

y weigh t basis ) Q=Tota l productio n o

f typ e T resi n ove

r th e 24-hou r period , in kg

. T=Typ e o

f resin

. M = Concentratio n o

f viny l chlorid e in on e sampl e o f grad e G i resi n i n ppm
. P=Productio n o

f grad e G i resi n represente d b y th e sample , in kg

. G i = Grad e o

f resin : e.g. , GI , G2 , G3

. n=Tota l number

o f grade s o f resi nproduce d durin g th e 24-hou

r period

. Th e numbe r

o f 24-hou r averag e concentration s fo r

eac hresi n typ e determine ddurin g th e reportin g perio d shal l b e reported

. I

f n o 24-hou r

averag e resi n viny l chlorid e concentration s i n exces s o f

th e limit s prescribe di n § 61.64(e ) ar e measured , th e repor t shal l stat e tha t

n o exces s resi n viny l chlorid e concentration s wer e measured

. (vi ) Th e owne r

o r operato r shal l retain a t th e sourc e an dmak e availabl e fo r inspectio n b y th e Administrato r fo r a minimu mo f

3 year s record s o f

al l dat a neede dt o furnis hth e informatio n require db y paragrap h(c)(2)(v ) o f thi s section

. Th e record s ar e t o contai nth e followin g information : (A) * * * j B j * * < , (3 ) Th e owne r

o r operato r shal l includ e i n th e repor t

arecor dof

an y emission s fro meac hreacto r openin g i n exces s o f th e emissio n limit s prescribe d i n § 61.64(a)(2)

. Emission s ar e t o b e determine di n accordanc e wit h § 61.67(g)(5) , excep t

tha t emission s fo r eac hreacto r

ar e t o b e determined

. Th e numbe r of reacto r opening s durin g th e reportin g perio dshal l b e reported

. I f emission s i n exces s o f

th e emissio n limit s ar e no t

detected , th e repor t

shal l includ e astatemen t

tha t exces s emission s hav e no t

bee n detected

. (4 ) I n polyviny l chlorid e plant s fo r whic hstrippin g i n th e reacto r i s use dt o attai n th e emissio n leve l prescribe di n recordo f an y 24-hou r

averag e resi n viny l chlorid e concentration , a s determine di nthi s paragraph , i n exces s o f th s limit s prescribe di n§ 61.64(e)

. Th e viny l chlorid e conten t

foun di n eac h sampl e requiredb y paragraph s (c)(2)(i ) an d(c)(2)(h ) o f

thi s sectio nshal l b e avsrags dssparatsl y fo r eac htyp e o f rssin , ovs r

sac hcalenda r

da y an d weighte daccordin g t o th e quantit y o f eac hgrad s o f

resin processe db y th e stripper(s ) tha t

calenda r

day , accordin g t c th s followin g equation :

, K o

§ 61.84(f) , th s owne r

o r operato r shal l includ e i nth s report e recor do f th e viny l chlorid s emission s fro mreacto r openin g los e an dal l source s followin g th s reacto r

use da s astripper

. (i ) Gn s rsprsssntativ s sampl e o f polyviny l chlorid s resin i s t o b e take n fro meac hhatc ho f

eac hgrad e o f

resi n immediatel y followin g th e completio no f th s strippin g operation , an didentifie d b y resin typ s an dgrad e an dth e dat e an dtim e th e batc hi s completed

. Th e correspondin g quantit y of materia l

A T = 2?ciC c l Pe l Cc l + P{ 2 C< 3 + Q T

whera : A = 24-hou

r averag e combine dreacto r openin g los s an demission s fro mal l source s following th e reacto r use da s a stripper , i ng viny l chloride/k g produc t (dr y weigh t basis)

. Q=Tota ! productio n o

f resi n in batche s fo

r whic hstrippin g i s complete ddurin g th e 24-hou r period , in kg

. T=Typ e o

f resin

. C=Avereg acombine dreacto r openin g los s an demission s fro

mal l source s following th e reacto r

use da3 astrippe r

o f al l batche s o f grad e G | rssi nfo

r whic h strippin g i s complete ddurin g th e 24-hou r period , ing viny l chloride/k g produc t (dr y weight basis ) (determine daccordin g to procedure prescribe di

n § 61.67(g)(6))

. P=Productio n o

f grad e G , resi n inth e batche s fo r whichC i s determined , in kg

. G i = Grad ao

f resi ne.g. , Gi , G-t

, an dGa

. n=Tota l number

o f grade s o f resi n inbatche s fo r whic hstrippin g i s complete ddurin g th s 2«3-hou

r period

. Th e numbe r

o f 24-hou r averag e emission s determine ddurin g th e reporting perio dshal l b e reported

. If n o 24-hou r avsrag s combine dreacto r openin g los s an demission s fro mal l processe di n eac hstrippe r batc hi s t o b e recorde dan didentifie db y resi n typ e an dgrad e an dth e dat e an dtim e th e batc hi s completed

. (ii ) Th e viny l chlorid e conten t i n eac h sampl e i s t o b e determine db y Tes t Metho d10 7 a s prescribe di n § 61.67(g)(3)

. (iii ) Th e combine demission s fro m reacto r openin g los s an dal l source s followin g th e reacto r

use da s astrippe r ar e t o b e determine dfor eac hbatc h strippe di nareacto r

accordin g t o th e procedur e prescribe di n§ 61.67(g)(6)

. (iv ) Th e repor t

t o th e Administrato r

b y th e owne r

o r operato r i s t o includ e a recor do f an y 24-hou r

averag e combine dl reacto r openin g los s an demission s fro m al l source s followin g th e reacto r use da s astrippe r

a s determine di nthi s paragraph , i n exces s o f th e limit s prescribe di n§ 61.64(f)

. Th e combine d reacto r openin g los s an demission s fro m al l source s followin g th e reacto r use da s astrippe r

associate dwit heac hbatc h ar e t o b e average dseparatel y fo r eac h typ e o f resin , ove r

eac hcalenda r

da y an dweighte daccordin g t o th e quantit y o f eac hgrad e o f

resi nstrippe di n reactor s tha t

calenda r

da y a s follows : Fo r eac htyp e o f

resi n (suspension , dispersion , latex , bulk , other) , th e followin g calculatio n i s t o b e performed :

+PonCo

source s followin g th e reacto r use da strippe r i nexces s o f

th e limit s prescribe di n§ 61.64(f

) ar e determined , th e repor t

shal l stat e tha t

n o exces s viny l chlorid e emission s wer e determined

. 11

. B y revisin g paragrap h(a ) introductor y tex t

o f § 61.7 1 a s follows : § 61.7 1 Recordkeeping

. (a ) Th e owne r

o r operato r o f an y sourc e t o whic hthi s subpar t applie s shal l retai n th e followin g informatio n a t th e sourc e an dmak e i t

availabl e fo r inspectio nt o th e Administrato r fo r a minimu mof

3 years : ft ft ft ft A 14

. B y revisin g paragrap h(a)(4 ) an d addin g paragrap h(b)(1 ) t o § 61.1 8 a s follows : § 61.1 8 Incorporatio n by Reference

. (a ) * * * (4 ) AST M D2267-6 8 (reapprove d1978 ) Aromatic s i n Ligh t

Naphtha s an dP.2 8



### Federa l Registe r/

Vol . 51 , No

. 18 9 /

Tuesday , Septembe r

30 , 198 6 /

Rule s an dRegulation s 3491 5
Aviatio n Gasolin e b y Ga s Chromatography , IB

Rapprove dJun e 6 , 1984 , fo r § 61.245(d)(1 ) an dIB

Rapprove d Septembe r

30,198 6 fo

r § 61.67(h)(1)

. ft ft * * 4 

### (b ) Th e following materia l i s availabl e fro mth e U.S

. EP

A Environmental Monitorin g an dSuppor

t Laboratory , Cincinnati , Ohi o 45268

. (1 ) Metho d601 , Tes t

Metho dfo

r Purgeabl e Halocarbons , Jul y 1982 , IB R approve dSeptember

30,198 6 fo

r § 61.67(g)(2)

. 15

. B y revisin g th e definitio n"volatil e hazardou s ai r pollutants " in§ 61.24 1 o f Subpart V to rea da s follows : §61.24 1 Definitions ,

« * « « A 

### "Volatil e hazardou s ai r

pollutant " or "VHAP " mean s asubstanc e regulate d unde r thi s par t fo r whic hastandar dfo

r equipment

leak s o f th e substanc e ha s bee n propose dan dpromulgated

. Benzen e i s aVHAP

. Vinyl chlorid e i s a VHAP

. 16

. B y revisin g th e definitio no

f "connector " in§ 61.24 1 o

f Subpart V a s follows : §61.24 1 Definitions

. 

### * * * * * "Connector " means flanged , screwed , welded , or

othe r joine dfitting s use dt o connec t tw o pip e line s or

apip e lin e an d apiec e o f equipment

. For

th e purpos e o

f reportin g an drecordkeeping , connecto r means flange dfitting s that ar e no t covere db y insulatio n or

othe r material s that preven t locatio n o

f th e fittings

. « * « * « (F R Doc

. 86-22032 File d 9-29-88 ; 8:4 5 am ] BILLIN G COD E 6560-50- M