# OAR Box 1107 Prepped by Ollie Stewart



## Document

Number: 

# 18 ) V-A- 1
Docket Number: 

# A-81-2 1

Printed 4/14/20087:12:27AM Sheet 18of 90 P. 1• <A '.^ssssr- ^^.''-'X-A' 

# /?'#'# SC'AT P. 2



### Tuesda y Septembe r 30 , 198 6



# Part I X 

# Environmenta l Protectio n Agenc y 4 0 CF R Part 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 PoUutants ; Fina l Rul e

• - • " v,-• .'ii&iiouaw»mwm-VBx!Z: saias : r:rm<v&.rtfm&

3490 4 Federa l Register / Vol

. 51 , No
. 18 9 /

Tuesday , Septembe r

30 , 198 6 /

Rule s an dRegulation s ENVIRONMENTA L PROTECTIO N AGENCY-

. • •.

_•• ; -.'•/-'• " , ' 4 0 CFF 8 Par t S H •.,- . [AD-FRl-3044-5 ] , ''";'

. " : Nationa l Emissio n Standard s tor----, v Hazardou s Air.Pollutants : Vinyl'.".'''' : Chloride ; Equipmen t Leak s o f Volatil e
AGENCY : Environmenta l Protectio n Agenc y (EPA)

. '•;

. •;.'•-..

- : ' ACTION : Final rule

. SUMBflARV

: Th e EP A propose d" • administrativ e an dclarifyin g revision s t o th e nationa l emissio n standar dfo r viny l chlorid e (VC) on January 9,1985 , (5 0 F R1182)

. Certai n revision s t o th e standar dar e bein g promulgate di n "Subpar t F throug h thi s actio n and , to a mino r extent , i n Subpart

V o f 40 CF R Par t 61

. Finally , throug h thi s actio n th e Agenc y i s denyin g th e petitio n o f th e Natura l Resource s Defens e Counci l (NRDC) an dth e Environmenta l Defense

. Fun d(EDF

) whic h sought reconsideratio n o

f th e EPA' s withdrawa l

... o f the.amendment s t o th e V C standar d whic h wer e proposed , i n 1977

. EFFECTIVE DATE : Septembe r 30,1986

. • Unde r sectio n 307(b)(1 ) ofth e Clean Ai r Act , judicia l 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 i n th e Unite d^ ' '';' „ State s Cour

t o f Appeal s for

the^Distric t o f Columbi acircui t

withi n 6 0 day s o f today' s publicatio n o

f thi s rule

. Under' : -"•.

- sectio n 307(b)(2) o

f th e Clean Air

Act i ', '

. . th e requirement s that^are th e subjec t fo r . today' s notic e ma y no t

b e challenge d

. late r i n civi l o r

criminal proceeding s brough t b y EP A t o enforc e thes e . : - requirements

. ' - . ;.._,, . Incorporatio

n b y Referenc e Th e incorporatio

n b y reference o

f certai n publications'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 a s 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 may b e obtaine dfro mth e U.S

. EP A Librar y (MD-35)

. Researc h + Triangl e Park , Nort

h Carolin a27711 , telephon e numbe r

(919 ) 541-2777

. Pleas e refer , t o "Viny l Chlorid e Standard : Response s t o Comment s o n Januar y 198 5 Propose dRevisions, " EPA-450/3-86 ^ 004

. Th e BI

D contains: , (i ) 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 t o th e comments , ari d(2 ) a summary o

f th e change s mad e t o th e revise dstandar dsinc e proposal

. Dockets. A docket , numbe r A-81-21 , containin g informatio n considere db y EP A i n developin g o

f th e promulgated':;, • . ' revisions , t o th e standar dfor VC.Ms^•; A%yA

. availabl e for'publicinspection^between' , . 8:0 0 a.m . an d4:0

0 p.m. , Monday 1 throug h .;, Friday , a t EPA' s Centra l DockfttSectiori ' : (LE-131) , Wes t

Tower Lobby

. Galler y 1,' •

. ' 401 ' M Street,

. S W.

v Washington/D C :

j$B£i 20460

. A reasonabl e fe e ma y bs i thaigeS'l *
• ' fo r copying.'

. '_••••'.;.-,

. - AAlAfAA

. FO RFyRTHE K OMF©Rldafl¥0@K

I seKnri'eTs'.' { 'A Fo r further informatio n concernin g th e l '- " enforcemen t

aspect s ofth e promulgated' ; revisions , contac t

Mr
. Richar dBiondi , ;

. Complianc e Monitorin g Branch , ' ',-• " Stationar y Sourc e Complianc e Division , ' • (EN-341) , U.S

. Environmenta l Protectio n i Agency , 401 M Stree t

SW. , Washington!- ' DC.20469 , telephon e numbe r (202 ) -382- A y 2826

. Fo r further informatio n concernin g th e backgroun dtechnica l information.- \ supportin g th e promulgate drevisions,- " contac t Mr
. Robert

E
. Rosensteel, ; Chemical s ah dPetroleu mBranch, : - ' ' ~ . Emissio n Standard s an dEngineering-V"

. ' Divisio n (MD^-13) , U.S

. Environmenta l ;: , Protectio n Agency , Researc h Triangle, ; ' Park , North Carolin a27711 , telephon e numbe r (919) 541-5671

. Fo r

othe r ;" % '•«'; ' informatio n o n th e regulatio n of V C an d th e promulgate drevisions , contac t Mr
. ".

- : Fre dDimmick , Standard s Developmen t -. - Branch , Emissio n Standard s an d• A..-.-. ;• ' Engineerin g Divisio n (MD-13) , U.S. V ' ; Environmenta l Protectio n Agency , Researc h Triangl e Park , Nort h Carolin a 27711 , telephon e numbe r

(919 ) 541-5578

. •'';swwj£Ba&m&mr

BMFORMATOOM:;-./vf••

• : A. ).r Summary o f

Revisions't o th e Standar d""•'-'

. Th e VC standar dwa s promulgate dony . Octobe r 21,197 6 (4 1 F

R46560 ) and 'vz,A' ^ applie s t o plant s producin g ethylene',-*-I dichlorid e (EDC) vi aoxychlorination,-

- _- . plan t producin g VC , an dplant s -''"{" ' producin g polyviny l chlorid e (PVC ) o r : othe r polymer s containin g VC

. Thes e plant s ar e subjec t

t o acombinatio n o

f '• ; performance , equipmen t

an dwor k -:. practic e requirement s a t

numerou s point s i n th e manufacturin g processes.' " ';, • Base do n it s revie w o

f th e 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 do n Januar y 9,198 5 (5 0 FR,
. 1182)

. Th e comment s receive dari d~ "," action s take n o n thes e propose d- revision s ar e discusse dbelow , i - . fcy • V

Requirements

for Leak Detection

and v Repair Programs

~ . U T

. "

" ':-

. • ' ' • ' r. .£. y r . .I- L ->. - A s propose di n Januar y 1985rV C is/r.-*' ? bein g adde dt o th e lis t

of substance s - . coveredb y 4 0 CF

RPar t 6 1 Subpar t

V y - \ whic h contain s regulation s fo r leak s . ; fro mcertai n equipmen t

i n volatile". " hazardou s ai r

pollutan t (VHAP ) service

. Previously , plan t

owner s subjec t

t o th e V C standar dwer e require dt o prepar e .lea k detectio n an drepai r

plan s fo r eac h V C an dPVC manufacturin g facilit y an H ; t asubmi t thes e plan s to EP

A fo r review

. '."An.analysi s o

f th e plan s submitte d ^reveale dtha t

thes e plan s varie dwidel y *frp mplan t t o plant

. Further , som e plan s ?;wer e considere dt o b e inadequat e an d (ineffectiv e approache s t o th e contro l of "VCleaks.. ' Ay •.-'-• • '\-'A j ;Th e incorporatio n o

f Subpart V by-fh e standar dfo

r V C emission s establishe s

j ] standardize dprocedure s fo r identifying , leak s o f V C an dfo r takin g steps.t o minimiz e emission s an drepai r leaks.

. v Further , th e incorporatio n o f Subpar t V wil l als o accomplis h astandardizatio n | i o f th e definitio n o

f wha t constitute s aA .;.':, leak fo r routin e leak

detection. '.,' ' yv ' However , t o avoi dunnecessar y change s t o existin g plan s whic h ar e effectiv e in : detectin g an drepairin g V C leaks , the

. .-; > standar dcontain s provision s whereb y an y facilit y ma y demonstrat e throug h .' " annua l (or

more frequent , i

f requeste d" b y th e Administrator ) performanc e tests.
- •tha t th e percentag e o

f leakin g valves

. • '\.'

. 'remain s a t

2 percen t a s a n alternativ e to ' * followin g th e Subpart

V procedures

. A n owne r ma y continu e t o follo w th e .•'•'.'

. existin g lea

k detectio n an delimination' , progra mfo r tha t facilit y for th e purpose./ ' 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

d o the y necessaril y riieet th e promulgate drequirements

. A'•. •.Compliance

Test Procedure

and Specific •'- • Opening Loss Limit for PVC Reactors
• Used as Strippers

•-;."• • ^ • . ; Th e Federa l Registe r

notic e tha t promulgate dth e curren t

VC standar d'•."'[ state dtha t

V C escapin g fro

mPVC resi n . tha t ha s bee n strippe din th e reacto r i s . no t intende dt o b e include da s par t of th e V C emission s measure dunde r th e : reacto r openin g los s requirements

. Fo r nonbul k PV C reactor s whic h ar e use da s strippers , however , n o metho dwa s .specifie dto determin e wha t par t o f th e • V C i n th e vapo r

spac e of 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 .:, . inth e PV C reacto r fo r us e b y al l nonbiil k resi n producers

. After

' considerin g th e comment s o n thi s • ; •' ' ^propose drevision , EP

A decide dt o promulgat e th e revision.

. .-- . •:

_' , r Anothe r

propose dchang e i n th e ,;\ ; standar daffectin g PV C reactor s use das,';

. stripper s applie dto th e productio n of "
• bul k PVC resins

. Two separat e vessel s .. . \ ar e use di n bulk

resi n production , a

. ' "prepolymerization " vesse l an da"post

- A polymerization " vessel

. Unde r th e standar dpromulgate di n 1976 , both of thes e vessel s wer e subjec t t o th e reacto r 

# 1

yK ?


## M

M S

*>V.'i

• • 3

UtM^i.4 alasiljlua iP. 4

Federa l Registe r

/ Vol

. 51

. No
. 18 9 /

Tuesday

. Septembe r 30 , 198 6 /

Rule s an dRegulation s 3490 5 openin g los s requirements

. However , a n analysi s o f

th e operatio n o f

" ^:-: , prepolymerizatio n vessel s reveale dthat , i thes e reactor s ar e opene dless '

.. . •;•; • - : l frequentl y tha 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

v . reacto r openin g loss ) i s impractica L I n ; ; - Januar y 1985 , EP A propose dt o appl y th e , equipmen t

openin g los s requirements , l/ i 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 •-,?. w^-o.Arz' requirements'are : mor e appropriat e fo r . . , th e operatin g characteristic s o f the ; -:.•; . 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 applicable , j

. . ; • * • prepolymerizatio n reactors
. Afte r • considerin g th e comment s o n thi s proposed'revision

. EP A decide dt o . . , '•

. promulgatetherevision."•'...

. ',;'• ; -.- - Clarification

of Definitions

and' r'"_ 'A. y Standards

y.yv ';;'".'''. : '-yy

; y.A'yr..y. ". ' Base dbr i th e EPA' s experienc e wit h - admmisterin g th e V C standard,'severa l

. • provision s o f

th e standar dar e bein g '~ ..- . revise dto.reduc e an y ambiguit y i n their

- „ implementation

. Fo r

example , specific.;)., : • definition s o f

"leak, " "exhaus t

gas. " an d: "relie f valv e discharge " ar e bein g adde d- t b clarif y th e applicabilit y o f

th e " '•:

. provisions , o f

th e standar dt o eac h o 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 );•*•' "j , '"•' ; purificatio n eq'uipnient'followin g ED C ''" ' ari dV C formation , th e definition s o f " "EDCpuriricarion , '.and''VC;- i ; \; ; > purification " ar e bein g revise dt o mor e '_ ; clearl y indicat e whic h equipmen t is.' ' 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 ari.'._ , . . : instantaneou s limit.The'performanc e tes t provisio n in. § 61.67(g)(1 ) has'also ":'.'
. bee n clarifie dt o specify , tha t tes t "result s ' shoul dreflec t

a s clos e fo., a3-hqu r

. , j -.' *

. - averag e a s practicable ! Further , 'th e 1 0

... ' ppm v standar dregulatio n i s bein g , * " J revise dt o specify tha t

al l exhaus t

ga s «•.'".-. ' stream s ar e covere db y this;_••-..'

. *>• '.> '••: ; yy ' requirement, ; includin g contrqidevicei;! 5 '

- bypas s streain8,Ir i orde r t o implement'"'"

- thi s clarification , provision s ar e als o W! a bein g incorporate dint o the.standar dfo r '

, calculatin g th e VCconten t i n byjJassed'v i emissions

. A final 1 revisidnllo th e lO'^"

. j ; pprii y requfremen t

IS : intended ; tty^/y^z'AV prohibi t plant s fro mdihiting' aiVyS^'f- l l • : exhaus t ga s stream ? wit h bthefe'idianst-';' : gase s i n orde r

t b mee t th e 10ppm y limit

. Unde r th e revise dstandard , combinin g >. s

- a n exhaus t

strea mcontainin g mor e than

_ 1 0 ppm v V C wit h anothe 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 wastewater
. r -•'.' • '•..--> • requirement s fo r

gasholde r

seal s ar e ,<

/

. . als o bein g revise dt o exclud e the '•'•; \'-~y •:'.)-( , expose dwate r

sea l o f gasholders

. ' .-•. ' v. . Experienc e wit h th e V C standar d, . t : ; - indicate s tha t

wate r containe di n the y\}y x expose dwate r

sea l of agasholde r

ma y *

. excee dth e 1 0 ppni v limi t durin g norma l >

< operatio n an dtha t

complianc e wit h 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 to 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 V standar dinclude : (1 ) Th e eliminatio n o f th e 30-da y limi t

fo r existin g source s to.'. "

- submi t request s fo r

th e us e o f

equivalent.:

. \ contro l measures ; (2 ) achang e fro m, y semiannua l t o quarterl y reportin g o f VC. ; ' emissiori s fromresi n stripping , reacto r ;'.y openings , an dexhaus t

gases ; an d(3 J ' .'

•

.." allowanc e o f

reportin g o f

period s b f

''"-

. exces s emissions'instea do f al l emissio n ' measurements
. . . •" " , . ' ',.. ; Summar y b 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, 1 energ y : an deconomi c impact s o f th e origina l standar dremairi generall y unchanged

. A " ' summar y o f

th e impact s b f

th e origina l • ' -.'

• standar dca n b e foun di n th e preambl e - • ' t o th e propose dstandar drevision s (5 0 - • FR1182)

. ;'

. - : -y " ~"-\""''-': v 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 ) o f a .meetin g o f

th e Nationa l Ai r

Pollutio n Contro l Technique s Advisory

Comriiitte e (NAPCTAC ) t o discus s th e ' revision s t o th e V C standar d"-.-.

- recommende dfo r

proposal

. Thi s meeting ' wa s hel do n Augus t

30,1984

. Th e . meetin g wa s ope n t o th e publi c an deac h attende e wa s give n a n opportunit y to , u ; • commen t o n th e revise dstandar d••:.•!.

. recommende dfo r

proposal. : f

't. -'^rAzz- ,y '- • Th e revisedstandar dwa s propose din ' th e Federa l Registe r

bri Januar y 9,1985

. )- "ITt e pubfeconrnientperio dwa s fro m•} '}'•'» Januar y 9,1985^toMarc h 25,1985

. A ' ' ,' 5 tpta l o f .1 6 coriimen f

letter s Were ! '

* A • '

- - ; ; received ; Industry^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 n agenc 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 n mad e t o th e P propose drevisions t o th e standard

. % ! Significan t

Comment s Sinc e Proposa l r . / ; Mos t o f th e commen t

letter s containe d multipl e comments , t n gerieral;.this i '%i,">' : comment s supporte dth e propose d':-;-.-:• ' administrativ e ari ddarifyin g r e visions.

- , . A detaile ddiscussio n o f th e comment s an dresponse s ca n b e foun di n th e BI D fo r th e promulgate dstandard , whic h i s reference di n the'ADDRESSE S sectio n • o f thi s preamble

. Th e comment s an d•'..'. response s i n th e BI D serv e a s th e basis , fo r th e change s tha t

hav e bee n mad e to , 7 th e revise dstandar dbetwee n proposal ; •. ' an dpromulgation

. .

- • . • ,• ..-.v.; - -'*'/..:-

. '

. Almos t

al l commenter s addresse dth e - propose drevision s t o th e relie f valv e •..: • discharg e standard

. Althoug h man y o f ' ' th e commenter s agree dwith.th e action s - tr i reforma t

thestandard , severa l i-••::.< • commenter s objecte dt o variou s aspect s ; ' ofth e discharg e limits

. Base do n ••'•.,:.-.•'•'-AT-. consideratio n o f

thes e comments , EP A ' decide dno t

t o promulgat e th e propose d- . revisio n t o th e relie f

valv e discharg e • - U • . standard

. Th e comment s o n thi s an d> . ' •• othe r propose drevision s are'addresse d : i n detai l i n th e BI D fo r

th e promulgated : - . standar dan di n summar y i n th e nex t ,;•;.. - sectio n o f

thi s preamble

. :: ;.. - On e commente r

requested' . reconsideratio n o f

th e withdrawa l o f

th e * amendment s t o th e V C standar dwhich ' wer e propose di n 1977

. Thi s petitio n for

- - reconsideratio n wa s base do n -"• : • ;tf

objection s t b th e Agency' s us e o f dat a-y - o n cost s an deconomi c impact s i n th e '

- decisio n t o withdra w th e propose d.-.:- • amendments , an dto
. th e Agency' s determinatio n o 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 n withdrawin g th e propose damendment s wer e ' inconsisten t

wit h th e requirement s bf

. sectio n 11 2 o f

th e Clea n Ai r

Ac t A s 'A discusse dfurthe r

i n thi s preamble , th e - : Agenc y i s denyin g th e petitio n for

- - Al • reconsideration. " , . .'"""'

- •': : '.-. ' Propose dRevision s t o Relie f Valv e , ^ •*

, • Discharg e Standar d

. : '^:.• < ' :>;;.':-.;-. ' Th e EP A ha s decide dno t tq i - yyyzpromulgat e revision s t o th e relie f valv e J discharg e standar dpropose dh i the '••'-.AAy ' Januar y 9,1985 , Federa l Registe r notice

. -

. Th e revision s Woul dhav e establishe da : . differen t t^eb f numerica l limi t

far , --' ' - relie f valv e discharges

. -Th e decisio n t o

- ' retai n theorigina l relie f valv e discharge ^ 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 h man y publi c comment s favore dth e propose d' revisions , other s oppose dth e charige

. I nP. 5

3490 6 Federa l Registe r /Vol

. 51 , No
. 18 9 /

Tuesday , Septembe r

30 , 198 6 /

Rule s an d Regulation s particular , severa l commenter s . '•'*•*•

- -. ' expresse dconcern tha t

preveritabl e - -•-...'•

- relie f valv e discharge s woul db e •••A\ • -'.,

. allowe d unde r

th e revisedstandar dari d7 ; that'th e pbrformanceallowe d under^the;- r , revise dstandar dcoul db e inconsistent•' • •" ' * • • with tha t allowe dunder.the original:': -i B , ; standard^Othe r

comment s expressed -JH-A

-

. concern'tha t

the.revise d standar d* : - c." , include dn o mechanis mfo r regulatin g - ^ *

, very larg e relie f

valv e discharges

. The ; -A basisVfo 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

valve.

- c discharg e standar dwa s als o questioned

. ; ,- , A s aresul t

o f thes e comments , EP

A •• • -••'

- reviewed-th e basi s fo

r th e u ' •'•'yz • - r .'

. •-:•-

• recommendation s tha t

le dt o th e * v'"."•"'•» ' decisio n t o propos e t o reforma t th e .'•'• ; ,r : -- . 'standard

. First , a s discusse di n the

. . '•''. " Federa l Registe r

notic e proposin g ..',: : revisions t o th e relie f

valv e discharge.; : : . standar d(5 0 F

R1187) , th e revie w o

f th e ; ' = standar d conducte dbetwee n 1980 an d •- 198 2 foun dtha t

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

commitment

b f : - Agenc y resource s t o th e revie w and ' :r- > • evaluatio n o

f discharge s o

f V C fro mAz.A relie f valves

. Becaus e th e existin g . ; ry standar dallow s only r "emergency";;-: -ye A discharge s o

f VC fro mrelie f valves (i.e.,!;. ; th e relie f valv e discharg e coul dno t be..

. avoided.b y takin g preventativ e ....-. : z.:y measures) , every discharg e mus t b e : .-\k-

- ..evaluated,individually.t o determine

. -'Oy ; • whethe r th e owner " o r

operato r of tiiey ^ r 1 facility ha s implemente dth e measures,. . .

- necessar y t o preven t

tha t relie f valv e tl'*.

- 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 discharge

. .standar d has-bee n mad e more efficient.

. Thi s i s du e i n larg e par t

t o experienc e /

, - . establishe di n enforcing.th e standard. '.- r A s aresult , EP

A enforcemen t

personne l conside r implementatio n o

f thi s v . standar dt o b e muc h les s resourc e an d'.

-

. labo r iriterisive ; ••.-.•--..- . - ,-.. - -.A'..'.

. A secon dconclusio n fromthe.198 0 t o 198 2 stud y wa s tha t

industry di dno t

'. ; : hav e aclea r

understandin g o

f wha t the..' , relie f valv e discharg e standar drequire d

... ' an dwha t measure s the y neede dt o implemen t

i n orde r t o compl y ,with;the . standard

. Durin g th e 4t o 5 year s since 'A A
. • th e review , study , a.numbe r o f 'M/t\ ' •';.

. enforcemen t

action s have

i bee n taken£?<

- agains t mdiyidual , plant' s fo

r viplatioris^f

i of-.tii e staAdardK'^qse:aVti.6nshaye.-C;:-;' ; > culminate d i n consentdecreesi.whic h sf V : incorporat e requiferiient s tor reinedial 0 i [• actibns.to(preven t

further."relie

f \ahreyA
'discharges.-"Hie pr^^ ^ " cbrisert t decree s hav e no t

onl y reduced;;'| > th e numbe r

of relie f valv e discharge s a t

; specifi c plants , bu t

the y hav e als o ; •

„ y --.,- serve da s guideline s i n determinin g th e • • • type s o f measure s appropriat e fo r : minimizin g th e discharges

. Becaus e o f thes e tw o developments, ; EP A conclude d - tha t th e original findings o

f th e revie w stud y ar e n o longe r

vali dan d shoul dno t

> ' b e th e basi s o

f arevisio n t o the.forma

t
. - > of.th e relief

valv e discharge:standard

. v'-i[ r Th e decisio n t o retain'the existin g •- i ! i.-) relie f Valve discharg e standar d as' apar t ';•; ofth e standar d forV C emission s is : :•";'£ ? further"supportedby;twoadditiona l ' • • - - advantage s tha t

th e existin g standard ; <> ! h a s ove r th e propose drevisions

. First , • ; th e existin g standar dprovide s ~- •'- ->'-! V - : ; tha t al l preventabl e relie f

valv e y': -~ - -' ; •-

' discharge s ar e subjec t

to'enforcement,-' ' L ' action ; Unde r

th e propose drevisions , V : whic h woul dhav e allowe dasmal l ^ ' numbe r o f discharge s pe r

yea r whethe r preventabl e o r

not , i t i s possibl e tha t

a plan t coul dexperienc e preventabl e ' ' discharge s an dstil l b e i n compliance;..." "' y wit h th e standard

. A s pointe dou t i n ; publi c comments, ' i t

i s theoreticall y • possibl e tha t

discharge s resultin g fro m'. : gros s negligenc e coul dg o unpenalized : : ' " unde r tn e revision s t o th e standard.

. Th e EP A di dno t

inten dthi s effec t

i n the?

. ' , . propose drevisions

. The

. retentio n o f th e ' existin g relie f

valv e discharg e standar d allow s EP A t o continu e th e curren t enforcemen t

approach

. -.? : ', A •-.--.. " Second , th e existin g relie f valv e , '/'. discharg e standar dprovide s abetter.,-.. , mechanis mfor

regulatin g larg e relief

- valv e discharges

. Th e propose drevisio n , woul dhav e allowe dacertai n numbe r of : relie f valv e discharge s pe r

year , withou t

, regar d t o th e siz e o r

duratio n ofthe

- . , . 7 discharge

. Consequently , a s lon g a s th e [ numbe r b f release s wer e withi n th e . ; . . numerica l limit s o

f th e propose d revision s t o th e standard , tiiere wer e n o • mechanisrii s i n th e standar dt o enforc e contro l o f th e amoun t

o f VC discharge d t o th e atmosphere

. Unde r th e existin g » relie f valv e discharg e standard , • . however , th e duratio n an dsiz e of th e ; discharg e ar e factors , i n determinin g th e severit y o f aviolatio n o

f th e standard

. A s aresult , aplan t

owne r o r operator , ha s agreate r

incentiv e unde r

th e curren t

• ; standar dfo

r fakin g actio n to
. reduc e the/,

- quantit y o

f adischarge

. '!'._

• . -;•'•: • '"- r

;
: I n summary,;EP A i s no t promulgatin g ... " th e revisions.t o th e relie f valve , y '•,'. ry i dischargeIstandar dwhic h wer e . - - " • ; propose di n th e Januar y 9,1985 , Federa l ; Registe r notice

. Thi s jdecisio n was - - , - reachedrafte r

consideratio n of

public ^ ^ comment s receive do n th e proposal , and: ' after areviewt) f

th e basi s for

th e J:>: \-, . . t decisio n t o reformat

th e standard.*; ' yyl Becaus e thi s revie w reveale dtha t tiie £ r burde n o n Agenc y resources has.

. -y'•••'••'.?.'.•• diminishe d a s experienc e with , th e ' implemeritatior

i o f th e standar d increased , an dtha t

understandin g o

f the , provision s o

f th e existin g standar don . < th e par t o f industry shoul db e clearer , . . th e netessit y fo r

revisin g th e forma

t of ;' ' th e relief valv e discharg e standar di s no,.'*;'• ' : longer apparen t Th e existin g standar d'-"

* 1 ; als o ha s th e advantage s b f penalizin g all: ! preventabl e relie f

valv e discharges,'. ; r

yV , providin g bette r

regulatio n of^

^ larg e i ft

; : r q volume*.relief|valv e discharges" , ari d."; , ' !v;

. promotin g continuity i n th e ongoin g zzvyJ, enforcemen t

b f th e standard

. ,'

V y-i-AX" '-• I n som e instances, ' i t

ma y b e possibl e ' fo r aplan t operato r t o contai n arelie f

> ; \'- valv e discharg e an dto ven t i t to a;. - • ; v - contro l device

. Where-.thi s ca n b e don e Y withou t exceedin g th e exhaus t

ga s '-. ; - ,-''i emissio n limi t

o f 10ppmv , EPA

- ;:

- conclude dtha t

thi s approac h shoul db e ' ^ encourage dand , therefore , th e discharg e , shoul db e exemp t

fro mth e relie f

valve

. . discharg e standard

. Ventin g th e ' discharg e throug h acontro l devic e ca n .'.';- ' resul t i n a99. 9 percen t

reductio n i n th e * " VC conten t

o f th e relie f valv e discharg e j withou t interferin g with th e contro l of'.',".•'. ' V C emission s i n exhaus t

gase s which.''..' " ar e als o vente dthrough;th e contrpl. '••A-'f\

. device.'Althoug h complianc e with th e 10 ^ ppmv staridar dwoul dexemp t th e ... . discharg e fro

mth e relie f

valv e discharge, ; standard , exceedin g th e 1 0 ppmv.'•:"::' * • - - '.

- standar dwoul db e considere dbot h a-.'.-" , violatio n o

f th e 1 0 ppmv staridar dan dof " th e relie f valv e discharg e standard

. Denial o f Petitio n Fo r

Reconsideratio n Th e NRDC ari dEDFpetitione dEP A t o ';

. reconside r

th e decisio n t o withdra w the.-.'', ; • 1977 propose d rieyisiori s to,,th e V Q • > ' standard

. Th e criteri afo

r grantin g suc h • •'

' apetitio n are : (1 ) Th e petitio n mus t b e base do n informatio n tha t wa s no t an d

. ' coul dno t reasonabl y hav e bee n : ' '

. presente dduring-th e origina l -'

. ' ^ '-' A y rulemaking ; an d(2

) th e petitio n mus t

'AA " provid e substantia l support fo r th e " '

. V

- argiiment tha t th e challenge daction' • •• • should-b e changed

. See Denial o f -i" ••••;'• !

- Petitio n t o Revis e NSP S fo r Stationar y " J : Ga s Turbines

. 4 5 F R8165 3 (Decembe r 1 ; *

. 1980)

. A s describe dbelow , thi s petition"'-.'-. ? fail s to'mee t

eithe r criterion , an di t

j s •'

- '.'-f i therefore,.denied 1 -"*• ; ' •'"'

. " ^ '-' ' Consideration of

Petition r. y ..' ; '.,' , . ' '

" ; ' .Th e NRDC/Ep Fpetitio n fo r . ^ .•.--.: • • reconsideratio n o f

.th e withdrawa l wa s v. base do n four.mair i premises

. Firs t '•^i i --,

.. . NRDC/EDF

. objecte dtb..th e EPA'Si V ;,^> !
• arinbuncemen t

ofth e withdrawal , of

. the^

. propose damendment s a s afinal;action , - : withou t bein g precede db y anotic e which;

. > propose dth e .withdrawa l an daUpwettiV;; ' fo r publi c commen t

o n th e action

. , y AA^. ' Second.;1^^C7EDJ P objecte dt o the ; ^;^. : influenc e o f

cos t doirisideration s ir i the;",: , decisio n t o withdra w th e proposed"

. •'.-'_,

- - amendment , statin g tha t

th e balancin g ,

- o f cost s an dbenefit s ir i th e settin g o f th e V C standar di s contrar y t o th e . , ;'. 'P. 6

Federa l iRegiste r

/ j Vol

. .-51.-No

. ,18 9 /'Tuesday , Septembe r 30 , 198 6 /Rule s an dRegulation s • 3490 7

, . . requirement s of.Sectio n 112-of;th e Clean' } Ai r Act-Third , NRDC/ED F too k issue;, t. ;

. wit h wha t

i t too k to.be;th e EPA's.'£>?; } '•••.{ assumptiQn?;that f S.eCtionill 2 ofth e Clea n J Ai r Ac t estab.lishes.'a.cequirement ; thata- j :' • - i leve l bl contro l mus t

shave ; been,': ' f&vA*, J , :. ; ::"coris,isterttly;achipye4"iin%e.fp!ast:;iri2;o: £ orde r t o forriv.th e basi s Qfsthe standard

. .•• , «? •

. : ' Finally,

. NRDC/EDF.statedJhafthe^.;!,.--'!.-

.

. EPA' s decislqnsWspecifiapprtioh s of ? - ; i

- • • ! th e propose dahiendmeqts'wef ^ J ' ; . • conflic t

wit h .th e evidence.qn?thbse,? ^ -y .•_yy ,,,.• • • ^SS\i^y.y^yvyyVyyy,. ,*,f.- v ViV£.&'H'' J

, i ; r I n th e firs t

objection ; NRDC^EqFstafe :

. - that , th e proposed^arnendmerit s toJhe~V

- ? -.' 1977.VC.standar dshoul dndt.,be^>k A y \ withdraw n becaus e n o notic e o f suc h V"

. . withdrawa l ha dbee n published,and. " •'.v'?.

. ther e ha dbee n noopporturiity.fo r publi c j commen t o n th e withdrawal

. Durin g the;" ;

. 8 year s whic h have'.elapse dsince.the•'.,' ' ;

. - proposa l o f

thos e amendments , there? ••yy
• 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 dtheiriwithdrawal.'Th e - amendments,:thei r

protehtia l A-i :•••-.• • •'•••< •'. ', consequences . ;aric f

th e decisiori s that;th e :

. Agenc y migh t

tak e wit h regar dt o the m...- l wer e al l befor e th e public

. Specifically,': ; - ;

. NRD C an dED F received.draft 1 '{•'f.-fi-'V'V' i document s relatin g t o th e .rulemakin g .-.'= • f. distribute dprior-t o th e NAPCTAC -,- J '' y > meeting

. Finally ^ NRD C di dno t giv e any ; •

. ;

. ' supportin g rational e fo r believin g that : - . • .furthe r

opportunit y fo r

comment-woul d .-. , .yield.an y relevant.rie'w^nfcirriiationo r .: - • arguments
. Therefore , EP A doe s no t '' • ' believ e tha t

additiona l tim e or-prbvisio n > fo r receivin g furthe r

publi c corhriierits. : v : couid'hav e bee n eithe r necessary?br'•

- •- f

- helpfu l fo r

th e resolutio n o f

ih e issue s <•. - •

- involvin g th e propose dariiendment s to? " - th e V C standard. ' : '-.'. " : - " • : Th e secon dissu e raise db y NRDC / - ' : ED F involve s th e inclusio n o f cos t

- consideratio n i n th e EPA' s rulemaking*:'

- - deliberation s unde r

Sectio n 112.Th e •'

- '

- NRDC/ED F maintain s tha t th e languag e . o f Sectio n 11 2 whic h require s th e •-•'•

. '-• ' ?
'

. standar dt o b e se t

a t a.leve l which ; ''••'. •••'. » provide s a n "ampl e margi n o f safety " to
- ' th e publi c preclude s consideratio n o f the ? costs'o f control..i n th e EPA.'s'judgment,~: >

. : th e V C standar dprotect s th e public.>'•-*< ; -C

- : • " • • healt h wit h fa

n ample.margin?ofsafe,ty>-;,t f

.-. , . : withi n the'rii^aningvo f Sectio n WzfiaAditfl EP A riiay conside r

cos t an dfeasiblityi n V settin g th e standard

. Th e EP A view s rr , i i

. . wer e explaine di n the\1975x7 6 V G VKfr-i^V i rulemaking.'The.NRDG/ED F provide d;x : ; rib new.inform'atior i qn.thisiiss.ue.^?*';^;/. ' : TheNRpC/EDFsJthirdibjecticfl-w a

. - th e EPAVasdnaJfrectariS't.atirig.tha t ar . • leve l o f

control.mustJbe.'cQrisistentl y .- 0 achieved " i n orde r

t o for mth e basi s ofi ; .' • th e standard

. Specifically * NRDC/EDF

-

. pointe dt o th e languag e ir i theFedera L • ;

. Registe r

notic e that'M O ppm v represent s th e lowes t leve l o f contro l whic h has

. : • - : beenconsistentl y achieved " a s '•;-.'..'• • .';.':",

. indicatin g tha t

EP A wa s applyin g suc h

. i .requirernerr t

i n evaluatirigalternaliv e l.\-\ exhaus t ga s requirements. ! However , >the

- *
; basis ? fbriEPA'siselectio n b f 1 0 pprnvas-O- ; '.' • th e VC-standard

. fo r

exhaus t ga s *' & •'•/ * > 'emissiohsri s tha t

this " letfe l of-contro l i s V::I "th e low'estachievabl e emissio n limit-^;•-*'

. *
• attaina.bleson' an'everrttHbe-exceede d * • - • ?.

- "'•basis.'Althoug h 5 pj)iri v ma y b e '; • • ; ; "•-':

- '-achieve db y sdme-'systems<jver-a'""" v -".«*«V ; *
• limMed'tim e pe'riod,-th e existirig-data ' >.':?' ?

. indicat e ihe ' thi s leve l o f cbhtrbl-carino t

> ; » f b e maintaine dove r

a ' long-term,'never

- • l

• : to-be-ie'xceede dbasis ; asreqiiire db y the' ; standards

. I n additio n t o bein g '•'••• • • • • •'• * achievabl e O

n aconsisterit,lorig-ter m- basis ; th e 1 0 ppm v standar dwa s als o ' deterrnine db y EPAt o provid e th e public' ' with ' th e ampl e margi n o f safet y require d'
• b y sectio n 112

. Therefore,'EP A beleive' s '" "
• that'th e standar dsatisfie s th e ' " \" ; 'requirement s o f

sectio n 112. " ' '.'.-.'". ' ; T^Ona l PO-n' s raise db y NRDC/EDF?' !

. i n suppor t

o f th e petitio n for;.' " ,. _.L:.r. '

. j reconsideratio n addresse dthre e specifi c V provision s o f

th e propose dariiendment s ; whic h wer e withdrawn

. Th e NRDC/EDF.-

. state dtha t

th e withdrawa l p f

thes e ' ; V

" provision s wa s i n conflic t wit h th e , ,.. * '. evidehc e befor e the'Agency

. Th e firs t ;„.". , ..specifi c portio n ofth e standar d? .addresse d.i n th e petitio n is.the ? ?.-'' ? --'.*-'

- •-

. withdrawa l o f

th e propose d 5 ppnj y v'r.L -. ' emissio n limi t

fo r exhaus t ga s emissio n \

_ i n favo r o f th e existin g 1 0 ppfn v > • .emissio n limit

. Th e NRDC/ED F state d'. ' •that th e evidenc e i n th e recor dsupports " , afindin g tha t

th e 5 ppm y limi t

i s " ' • achievabl e b y ne w sources , an db y existin g source s withi n 3 year s o f ; -. , ' proriiulgatidn

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

emissio n limi t

riot \ ] b e foregone

.

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

fo r 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 n limi t

ha s bee n determine dto ;

. b e consistentl y achievabl e b y industry, ,

. ? whereas?th e 5 ppm v emissio n limi t • - >•-.; ; ' canndt.b e consistently : achieyed

. -. . .;•:- ? Second , even 4 thoug h theJimi t o n \ ;

_-'.- ? .:• . • 'maxirrium'emission s o f V C i s se t

a t J. 0 •.- , '

. ppmv' , th e averag e an dmos t short-terir i ^ , ^eiriissiorfs'.wil l b e considerabl y lower.. r rh :

. . tha n thi s level

. Third , lowerin g th e ' A'Ay viemissio n limi t

o n maximu memissio n ; t e frate s t o 5 ppm v woul dnot , significantl y .. : '?reduce-the.average:ejnissipns,-and,. ? zH,y

• therefore , adoptin g th e "lower , standar d<•> ', wa s deterriiine db y th e Agenc y not.t o 1 ? t hav e asignifican t

impac t o n emission s ,

- bf.V C or* accordingly , o n publi c healt h -: , risks

. Th e petitio n fo r

reconsideratio n

. . presente dn o new-evidence.relevan t t o th e Agency' s decisio n t o withdra w th e > propose d5 ppm v emissio n limit

. . i. ;

. .Th e secon ddecisio n addresse db y th e ' petitio n fo r

reconsideratio n a s v\ x :•'• ; ' - ; \conflictin g wit h th e considere devidenc e ^ i s the;witHdrawal?o f

Ih e 5 ppmv.- ' ; z. •.[
.. i ; emissiortliriji t

fo r oxychlorinatiqn.vetits

. •*

. Theipetitib n point s t o astatemenfi n theV '
. 197 7 proposa l tha t

thi s eriiissibn'limif;-

. ?*. / • could.b e attaine dbase do n th e us e of ! '• t oxyge n as afee dmaterialrathe r thari-. ' :•' : • air , an dmaintain s tha t n o discussio n o r

- evidenc e wer e presente dwhic h would.

- ?•-

. Justify .withdrawa l o f

thi s proposal: ? J':;•'•

. I n th e Federa l Registe r (5 0 F R1185),

- evidenc e wa s preSented'b y th e Agdnc y '

. y,\ supportin g th e conclusio n tha t mor e ' stringen t contro l o f

emissions-from : ' • K. oxychlorinatio n vent s wa s unnecessary ^ : First , no.new'technologica l control s • . :hav e bee n develope dwhic h are ? , : yy applicabl e t o thes e vents
. Second , the

. V •• / cost s o f incineratin g oxychlorinatio n ;'

. . ' -ven t streatri s wer e reevaluate dan d 4 . ' ? determined, ' a s before , t o be,>

. ',-

. :\
. - • unreasonabl e compare dt o th e smal l .?,

. reductio n i n V C emissions

. An dfinally,.

- , ! wit h th e possibl e exceptio n o f on e plant , ? n o ne w EDC/V C plant s with

- ; . ? ? • oxychlorinatio n reactor s ar e expecte dt o b e constructed , an dan y tha t ma'y ; be , : constructe dwil l b e adequatel y regulated• ' b y the'requirement s o f ne w source" ? ; •'•

• . . revie w regulations

. N o ne w informatio n - wa s presente di n th e petitio n for

. ; * ; ..'•-.,

. .reconsideratio n relevan t t o th e decisio n '

- t o retai n the ! existin g oxychlorination ? ven t standard

. • .. . "..

. '

. * • .- .

- Th e thir ddecisio n whic h wa s addresse di n th e petitio n fo r . • ' - . recorisideratio n a s conflictin g wit h the

. • 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
. for-othe r new,resin s fro m40 0 ppmv-.to ; -, ; 10 0 ppmv . Th e petitio n state s tha t - ^ existin g (facilitie s ar e currentl y meetin g .- ; th e lowe r

limits , an dthat.bot h ne w an d• •

- existin g facilitie s coul db e brough t int o complianc e with.th e mor e stringent

. • > ; .limit s by,usin g th e equipmen t and-; : procedure s currentl y used.b y th e leading- ; -facilities.- ; -y(: \ " : '•••?.' • - J '•• .v., ' •' >

, - Th e EP A withdre w th e propose dmor e : stringent ; strippin g leve l requirement s fo r tw o mai n reasons . The-firs t is.tha t th e • . . natur e ,of.PV C productio n make s it..

. •:'.-.

. * ; y : difficultjto.distinguis h ''new'ifrorii^ald>

. • resiris

. Resi n composition s areadjustedu ? routinely , ari dcompletel y "new " Resins, ; ; . "ar e rarely,- : i f

ever.rnade.-Second,rEP A ?\ v conclude dtha t

ther e i s ridimprdve d• , . technolog y whic h woul dprovid e the,?, , * , basis/o r mor e stringen t

strippin g ., ; •. ; requirement s fo r

al l resins

. The , ;.*.--.- : technologie s whic h ar e effectiv e fo r ; , specifi c resin s ma y no t b e effectiv e for.-

.

a^^a i IAiaU,iil.ala sP. 7

3490 8 Federa l Registe r / Vol . 51 , No , 18 9 /

Tuesday , Septembe r 30 , 198 6 / Rule s an d Regulation s othe r resins.Th e consequenc e o f .: • ••-. - establishin g a mor e stringen tstandar d ,-•• ; would.b e tha tcertai n hard-tOTStri p •:. • resin s could.n o longer , b e produced . In ,r ; the , EP A *8-opinion , *uch ; a resul twould.© ?

- ;be.an-unwarranted .economi c impact^fei'i, , ,whjchlisunnecessary.t o provid e a n .-^A ; amplernargipjof/safet y fo r publi c health, !

. : JN o new.releyant.infonnatio n wa s .-,••• , 'AA* •\ C.'presented in-thepetitiqn.tfqr. f A •:•>,A, yy^AA : reconsideration.;[,-•,-, :•'.•'}-,.*,•••- : •~y '- , •,.:•- • •-••••'iAdministrativ e '•'*<•••'*• y : " " • •-- : ,•• ' : -

r - - '•' • ,Th e docke ti s a n organize d an d .?...: . ; - complet e fil e o f

al l th e informatio n •"

. , V ; , considere d b y EP

A i n th e development;' . o f this rulemaking."Th e docket , is. a . !.'.,,...'. . dynamic.file , sinc e materia l is.adde d ';?"??,' ? ..throughou tth e rulemakin g development. ': . Th e docketin g syste m i s intende d to. 'v'.. ,.'- ' allo w members , o f

th e publi c and,.'. ' ... . industrie s involve d t

b identif y and.'. ' A _'['..'. " locat e db'cumerits?s q tha tthe y ; can';' ' ;.?-..r ' effectivel y participat e i n th e ru'lernakirig?. ' . \ process ? Alon g wit h th e stateriien to f ?",' V • '[ basis an d purpos e o f

the?p"rppose

d arid '"'y " -".promulgate d standard s an d EPA'J . 'A'Ay ;': responses ' t o significan tcomments ; th e ' ; contents'o f

th e docket.'exce'p tfo r '?-".,'?- . : . iriteragericy'revie w materials ; wil l serve. " ' as ' th e recor d ir

i cas e o f judicia l review' ' [sectio n 307(d)(7)(A)] . "'.'" . ? ' . ' Th e effectiv e dat e o f

thes e revisionsi s , A 'Septembe r 30 i 1986 . Sectio n 11 2 o f th e Clea n Ai r Ac tprovide s tha tnationa l emissio n standard s fo r hazardou s ai r ' " pollutarits'becom e effectiv e upo n ? : ' . ; . '

. promulgatio n an d a'ppl y t o al l existin g ''• -'an d ne w sources:;- /

.-.--, . : -Ay'<--y yrv A} 'As prescribe d b y sectio n 112,-/•-' - -; "-? * promulgatio n bf.thi s standar d was'- ' ' ' •" ' precede d b y th e Administrator' s li s tirig o f V C unde r sectio n 11 2 o f th e Ac to n , -'.'" ' December'24,197 5 (4 0 F R59477) . I

n ' '•'- . accordanc e wit h sectio n 11 7 o f Ih e Act, "
• publicatio n o f

thes e proriiiilgate d • ' '•-? - revisions''wa s precede d b y consultatio n wit h appropriat e advisor y committees, " !
• independen texperts , an d Federa l •'.-•• department s an d agencies / r-.-r•'• Informatio n collectio n requirement s ' ' ! associate d wit h thi s revise d regulatio n , r

- (thos e include d i n 4 0 CF RPart61,-'.;- ' Subpart'Aan d Subpar tF ) hav e bee n ' " •approve d b y th e Offic e o f Management-' / an d Budge t(OMB ) unde r th e provision s o f th e Paperwor k Reductio n Ac to f 1980 , ,

. 4 4 U.S.C ; 350 1 etseq,, an d hav e -beenv/^-i, - ..- • .assigne d OMBxontro l numbe r 0186.-Th e " ;
•• > revised staridar d i s estimate d toTesulti! " '•"-. * - .i n a - paperwor k -burde n o f

abou t36,v?-'?;.:•' ' vpersbriiyearswhichis ; roughl y tth e sam e y . : : ;'•'-. a s th e origina l standard . * S M a •• & ,~4f$>i'\% six. •' • - : , .Under>Executiy e Orde r i2291.£PAis . r- r require d tb judg e whethe r a regulation i s > ' a "major,nile".and4herefor e subjec tto?;.' . •certain-requirement s o f ;the Order.-Thec-.s?- . EP A ha s determine d tha tth e revise d ' . *

• regulatio n woul d resulti n non e ofth e advers e economi c effect s se tfort h i n • : Sectio n 1 o f

th e Orde r as.ground s fo r findin g a regulatio n t o b e a "majo r rule. " • Th e revise d regulatio n isnotmajon ; because : (1 ) Nationwid e annua l - ^ : , ' '• ; complianc e costs,-includin g capital : r , ; charge s resultin g fro m th e standar d total . les s tha n $10 0 million ; (2 ) th e standar d doe s no tcause- a majo r increas e in.. . ; y price s o r productio n costs ; an d (3 ) the ? : . standard s d o no t<;aus e significan t: " advers e effect s o n domesti c competition , employment , investment , productivity, , - innovatio n o r competitio n i n foreig n . : markets . Th e EP

A ha s submitte d thi s rulemakin g t o OM B unde r Executiv e '. . Orde r 12291.r^-'.'•"- , ;.'.'- , / ..:, ; :-/.-^. " Th e Regulator y Flexibilit y Ac to f 198 0 require s th e identificatio n o f potentiall y advers e impact s o f

Federa l regulation s upo n smal l busines s entities . Th e Ac t specificall y require s th e completio n o f a , Regulator y Flexibilit y Analysi s i n thos e •' , instance s wher e smal l busines s impact s •'" * are.possible..Becaus e thi s revise d . . standar d impose s n o advers e economi c impacts , a Regulator y Flexibilit y Analysi s ha s no tbee n conducted . Pursuan tt o th e provison s o f 5 U.S.C . 605(b) . I hereb y certif

y tha tth e propose d rul e wil l no thav e a significan teconomi c impac to n a.substantia l numbe r o f smal l entities . ''_'• ' : / : 'yy:.'". Lis to f Subject s i n 4 0 CF RPar t61 . •

. Ai r pollutio n control , Asbestos , „ Benzene , Beryllium , Hazardous . materials , Mercury , Viny l chloride . • Dated : September 24,19861 ; . - ' A Ay '•' Le e M . Thomas , J '--,,;" : - Administrator, r-.y ?!'...- . , ?'. ; PAR T 61—NATIONA L EMISSIO N | STANDARD S FO R HAZARDOU S AI R POLLUTANTS ; Fo r the.reasons , se tfort h i n th e preamble , 4 0 CF

RPart6 1 i s amende d a s follows: - -

, '" • •' • 1 . Th e authorit y citatio n fo r Part6 1 coritunue s t o rea d a s follows:. . ';... . • ;. - .-'.'.Authority : Sees . 101,112,114.116.301 , Clea n Ai r Ac ta s amended (4

2 U.S.C . 7401 , 74l i 7414, 7.416

, 7601K..'r ,.-:-. • .•.-..•-..--' . ; 2 . Sectio n 61i6 1 i s amende d b y revisin g paragraph s (j) , (l),'(o ) ari d (p ) ' ari d b y addin g paragraph s fv), ' (w) , (x) , .A (y) , ari d '(z ) t o read as ' follows : '•," , 'yA y
, -••- :.:\>ro r•• :'-T->-~--i t'V}.'i-j ..S''i'.'i K

A rf>..-.i 

### §§6i:6i;.!DeflniHpris^it/,', [•nv-AivJv

- •••Ayy ^'vv* : ^yytM^r^vyrAry; 'i.w - y- (j ) "Inproces s wastewater " mean s an y wate r which,.durin g manufacturin g or" - v processing , ;come s int o direc tcontac ty-yyy wit h vinyl , chlorid e o r -polyviny l chloride , •o r results frori

i th e productio n o r us e o f . • an y ra w material , intermediat e product , finishe d product , by-product , o r wast e - produc tcontainin g viny l chlorid e o r •;">• • polyviny l chlorid e but . whic h has ; nb tj • >-' - bee n discharge d t o a wastewater.--':' ^ '-'A treatmen tprocesso r discharged; 1 ? ^ -'y ;•• untreate d as^astewateri'Gashblder ' ,vp* » sealwateH s -no

tinprqciSsswa s tevWit'e

r y. x "unti l i tisrembye d from thegashblder ;, .V ! ' '
.., • 'r.^v;^-^h:ij?.''«'i : ;|! y 'Kifef^''•''':-* '


### • : 

### ,ui.,'^ : 

### ^ui'y^- AyyA?£y<,yytt>z>r!

. (I ) 'I n .viny l chlqnd e servic e mean s >vt n tha ta piec e o f

equipmen teither,contains * o r contact s a liqui d tha ti s a least.lO'-t^a, - percen tviny l chlorid e b y weigh to f a'ga s . tha ti s a tleas t1 0 percen tby.volume' , {, ' viny l chlorid e a s determine d according.j. , t o th e provision s o f

§ 61.67(h) . The, ' : .A.J provision s o f

§ 61.67(h ) ais o specif

y now,' , t o determin e that' a piec e b f equipmen tis . no ti n viny l chlorid e service . For.th e -'.I'J.M. purpose s bf

thi s subpart , thi s definitio n ,i . mus tb e use d in.plac q o f th e definitibn.o f

^ "in VHA P service " i n Subpar tV o f this . :•' ? part.*:^,.;.,^,: ^ ; ^:;,;,::. ••^yj x v ; }

- - .;•:• • ;.--,!.-••••'•.•.•.-..n-'.i;wi-;«--..* , '-.M-': ' (o ) "Ethylene'dichlorid e purification"^ , include s an y par to f

th e proces s of

- '-•'; '•$ & •' - ethylenedichlbrid e productio n which'? !? ' ! ' follow s ethylen e dichlorid e formation,';'' J ' excludin g produc tstorag e followin g th e j : fina l finishin g column. " • 'y :A}- ] ' : ''.l A 'L (p ) "Viny l chlorid e purification'.' . .' • *'•''• " ' incude s an y parto f

th e proces s o f

vinyl ; ; .chlorid e productio n whic h follows ' vinyl ; '• chlorid e formation . • ' ' - ' . ••:'!"','' "

* . - * "". - * • * - * - •' • • - • .-.- " : ' - •"-"" •

- (v ) "Relie f

valve'. ' mean s eachn?,->..,,,•,:, ) pressur e relief.devic e includin g pressure, ; relie f valves , ruptur e disk s an d other:,-. : y. pressur e relie f

system s use d t o protect;,, - proces s component s frori i overpressure,;^: ' conditions./'Relie f

valve " doe s no t•;.,*-«-!-.,•'. . includ e polymerizatio n shortsto p :.,.! ' systems , referigerate d wate r systems.o r : 3 contro l valves.o r othe r device s used.t o v ; contro l flo w t o a n incinerato r o r other , '., ai r pollutio n contro l device. , :.-.-;.; f .,•;,- : - P (w ) "Leak'- ' mean s an y o f severa l •: - •

: >•;•' • event s tha tindicat e interruptio n o f -'. ; -> - J confinemen to f

viny l chlorid e withi n n ; , proces s equipment . Leak s include , events' - regulate d .unde r Subpar tV o f thi s par tsi':.

' suc h as : (1 ) A n instrumen treadin g o f •''•>.j", 10,00 0 pp m o r greater measur e according ; t o Metho d 2 1 (see.Appendi x A of,4 0 CF R, Part60) ; {2 ) indication s o f liquid.?' * u.Arvr

: drippirig ; (3 ) a senso r detection.offailure' S o f a sea l system , -failure o f a barrier-flui d system i oriboth f

an d :(4 ) detectabl e r ryi^z emissions'a s indicate d :b y a n instrumen t*
, readin g o f

greate r ;thar

i 50 0 pp m abov e ja ?

rbackgroun d fo r equipment-designated! ^ fo r h o detectabl e emission s measure d *e%

. accordin g t o Tes tMetho d 2 1 (se e • .' • •••£)'•% & Appendi x A b f

4 0 CFRPar t,60) . Leak s li j • '. : als o includ e event s regulate d unde r ' ' v * § 61i65(b)(8)(i ) fo r detectio n o f ambien t• concentration s i n exces s o f backgroun d 'P. 8

Federa l Registe r

/ Vol

. 51

. No
. 18 9 /

Tuesday , Septembe r

30 , 1986 /

Rule s an dRegulation s 3490 9 concentration

. A relie f

valv e discharg e . i s not.aleak.;,-

. ;'.',••>'•,.. *

. z,C, •:?•

- - . - . (x ) ."Exhaus t

gas " mean s ari y offga s . , (th e constituent s o

f whic h may.corisis t

, . o f an y fluids. r eithe r

a s aliqui dand/or , -gas ) discharged-directl y br.ultimately'toJ

. th e atmospher e jtha

t wa s initiall y • ; '

. : . : .'containe din d.rw t a' s ir i "direct, contact.~,.
. wit h th e equipmVnt/o r

whic h exhaust

. ; V
. ga s limit s "ar

e prescribe di n | 61:6

2 (a ) -.y •an d(b);' § 6l.63(a);_§.6l64(a)(1) , (a)(2)', ' , (b)'.-'(c)

. ari d(d) ; § 61.65(b)*(l)(ii)„(b)(2),.,,.

. ; (b)(5)

. (h)(6)(iU.and(bj(9)(ii).: ; , y;A. : v •:•; .(y ) ''Relie f

valv e discharge"..means

. ... ' ..an y nonleak

discharge.throug h arelief'

.

. valve , "Relief

valv e discharge " doe s no t
. includ e discharge s ducte dto
. acoritro l ?. ' syste mfro mwhic h th e concentratio n of

. . viny l chlorid e in th e exhaus t gase s doe s ,

- no t excee d1 0 ppm(averag e fo r 3-hoii r period) , o r

equivalen t

a s provjde din,'.

. §61.66

. •'•"•[[. ~'- : Ayv_y-'yf-. A Y
. „'....

. (z) "3-hour

period! ' means ariy.thre e consecutiv e 1-hou

r periods'feac h hour.. f commencin g o n th e hour) : Ayy...y.vA-i.y. 3

. Sectior i 61.62 i s amende dby-".;'. " ' revisingp'aragraph s (a) an d(b ) to rea d

. a s follows' : 1'".-..*.„?"

. -.:'... , ;,.. . ,' ./• t% .'..'-. ; § 61.6 2 Emissio n standar d fo r ethylen e . , dichlorid e plante d ^ \ ;_?'.. . .'.AA -.' • [a)Ethylene.dichloride purification. Th e 'concentrationofviny l chloride , i n each ! exhaus t

ga s strea mfrom...any..-..•..- , • equipmen t

use di n ethylene , dichloride

. .. . ,\

. .purificatio n i s not , to
. excee d1 0 ppm?- ri ;: , - : (averag e fo

r 3-hbu r period) , excep t

a s .'

. provide dir

i § 6li65(aJ

. Thi s requiremen t doe s no t preclud e combinin g o

f exhaus t
. ga s stream s provide dth e cornbine d1 stea mi s ducte dthroug h acoritro l ' , . . syste mfror

h whic h th e concentratio n b f

. . viny l chloride,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 requirement

. • 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 requireiheri t

in § 61.65(b)(6)(i)

. : before bein g opened. , , , . y -(b ) Oxychlorinatioriyeactbr. Except?a s provide din. § 61.65(a) , emissions.o f viny l chloride,t o the , atmosphere

. fro meach

. v . oxychioririatio n reactor.are no t t o .','- , excee d6, 2 g/k g (0.0002

. lb/lb ) (averag e ; - for.3-hqur,period ) o f

th e ,100

. percen t ;, v . .ethylene , dichlorid e .produc t fro mthe .'.-
. .-•-, '< " -oxychlorinationprocess ^ .--,-;"",,• • •< • ..-A:.. .4. Sectio n 61.6 3 i s revise dt o rea das.'.- , .follows:,*?; , ry A AA.Ay..y,~j ••.,"•"''•'•'•.;.. -. v

. § 6.1.6 3 Emissio n standar d torylnyr . :;? y ,chlorid e plants . '•; . ; A't^yA l'y, ••;'...\.-.' v -"'".- '•' . rAri'oyvme f o r operato r of. a vinyl , ",. . chlorid e plan t

shalLcbmpl y wit

h th e ., . . , requirement s b

f 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 in eac h exhaus t

ga s strea m fro

man y equipmen t

use din viny l •. chlorid e formatio n and/o r purificatio n js , 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 preclude.- : . .•••; . combinin g o

f exhaus t ga s stream s . ; 'A provide dth e combine dstea mi s ducte d throug h acontro l syste mfro mwhic h th e ' concentratiori o

f viny l chlorid e in the

. •"•-

; '-\ exhaus t gase s doe s no t

excee d.1 0 ppm, . p r equivalen t

a s provide din § 61:66

. S" , Thi s requiremen t

doe s no t appl y to • •

' equipmen t

tha t ha s bee n opened , i s out

: o f operation, ; an dme

t th e requiremen t

in • § 61.65(b)(6)(i) befor

e bein g opened

. ; 5

. Sectio n 61.6

4 i s amende dby..;

. ••-.; : revisin g paragraph s (a) , (b) , (c ) an d(d) to rea da s follows : ' § 61.6 4 Emissio n standar d fo r polyviny l chlorid e plants . _• ' „ t ? , "

•

*

. * - *

. • -. *

'

a '.'.-.''•
- (a ) Reactor. Th e followin g - . : ' requirement s appl y to reactors:
- • : (1 ) The.concentratio n b

f viny l chlorid e i n eac h exhaus t

ga s strea mfro

meac h reacto r i s no t to excee d1 0 pp m(averag e

. fo r 3-hbu 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 ) The.reacto r

openin g los s fro

meac h reacto r i s no t to excee dO.0

2 g vinyl..

. • . chloride/kg (0.0000

2 l b viny l chloride/lb ) o f polyviny l chlorid e product , excep t a s • provide din paragraph s (f)(1 ) an d(f)(2), , . - of thi s section , wit

h th e produc t

- - r.-i-

- . , determine do n adry solid s basis/Thi s requiremen t

doe s no t appl y t o prepolymerizatio n reactor s i n the

. bulk

. process . Thi s requiremen t doe s appl y t o postpolyriierizatio n reactor s i n th e bulk

. process , wher e th e produc t mean s th e gros s produc t

o f prepolyriierizaUo 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 to th e atmospher e fro man y • manua l ven t

valv e o n apolyviny l >

• chlorid e reacto r

i n viny l chlorid e service

. A n emergenc y manua l ven t • , valv e discharg e mean s adischarg e t o th e atmospher e whic h coul dno t have ' • — bee n avoide db y takin g measure s t o • . . preven t th e discharge

. Withi n 1 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

or, , j-••

- operato r o f th e sourc e fro

mwhic h th e , - discharg e occur s shal l submi t t o the

Administrato r

arepor t i n writing

. -

• . , y containin g informatio n o n th e source , • ' natur e an dcaus e ofth e discharge , th e ; dat e an dtime 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 n o

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

wa s take n to ; preven t th e discharge , an dmeasures.'.'.- :

, adopte dt o preven t

futur e discharges

. •;

. ,(b ) Stripper. Th e concentratio n o f vinl y chlorid e i n eac h exhaus t ga s -.•••-'"

- : strea mfrom,eac h strippe r i s no t to' / - • 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 requireriien 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 dme t

the

- .-'•••''

- - ?

. requirementio n § 61.65(b)(6)(i ) before". 1 " bein g opened. A
.

' v rA\•••:':.

, -(c ) Mixing, weighing, and holding -,-. : . containers. Th e concentratio n o f viny l - chlorid e in eac h exhaus t

ga s strea m • fro meac h mixing , weighing,-o r holdin g containe r i n viny l chlorid e servic e whic h ; precede s th e strippe r

(or th e reacto r

i f

. th e plan t ha s n o stripper ) in th e plan t • proces s flow i s no t

to excee d10

. ppm .

. (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 has.

. ,

. bee n opened , i s ou t

of operation ; and

.

. me t th e requiremen t

i n § 61.65(b)(6)(i )

. before bein g opened

.

. . '

. (d) Monomer

recovery system. ^The '

•

- concentratio n of

viny l chlorid e in eac h "

, exhaus t ga s strea mfro

meac h monomer

. recovery 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 § 6i.65(a)

. Thi s requirement

.

- • 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 )

, before bein g opened

. ? - -..,.'; • • • • *.-.*.- ' * * a' .?.

. . ' , , . 6
. B y revisin g paragrap h (e ) .-•-. - A"' '. introductory text , an daddin g "'•••"-

. paragraph s (e)(3 ) an d(f

) t o § 61.6 4 to? rea da s follows : ' ' •

. § 61.64 . 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 the

. reactor(s ) i

f th e plan t ha s n o stripper(s) ] in th e plan t

proces s flow includin g bu t

, . no t limite dto , centrifuges , -,-• • •..'..•_:.

.

. - concentrators , blen dtanks,-filters , •--..- . - r dryers , conveyo r

ai r discharges , baggers , i storag e containers , an dinproces s ; > . ,- wastewater , excep t

a s provide di n -, . •y- paragrap h (f

) of.thi s section : . : ••••..- .

- . . (I)*** ' - . --'< \ ••-••- ^,'(2)VV . , .,,• ' ,-.; - ,:-;.:„- • ;-,••• . ,: . (3 ) Th e provision s o

f thi s paragrap h

. ; appl y a t al l time s includin g whenoff-.'. ' :< - specificatio n o r

othe r type s o f resins ar e ' ; < made.-r-;;

. - •-•' -v. - •.'.-•'< • •'•
• .. (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 h ma

y b e applie d in lieu o f § 61.6 4 (a)(2 ) an d(e)(1) :P. 9

3491 0 Federa l Registe r / Vol

. 51 , No
. 18 9 /

Tuesday , Septembe r 30 , 198 6 /

Rule s an dRegulation s (1 ) Th e weighte daverag 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 astrippe r

fro mal l grade s o f polyviny l chlorid e resi n strippe di n th e reacto r o n eac h calenda r

da y ma y no 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 e resins , excludin g late x resins , wit h th 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 late x resins , wit h th e produc t determine do n a dr y solid s basis

. 7
. Sectio n 61.6 5 i s amende db y revisin g paragraph s (a) , (b)(l)(ii ) an d (b)(2 ) t o rea da s follows : § 61.6 5 Emissio n standar dfo r ethylen e dichloride , viny l chloride , an dpolyviny l chlorid e plants

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

discharge , ther e i s t o b e n o discharg e t o th e atmospher e fro mart 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 h coul dno t

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

. Withi n 1 0 day s o f an y relie f valv e discharge , th e owne r o r operato r o f th e sourc e fro mwhic h th e relie f valv e discharg e occur s shal l submi t t o th e 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 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 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 ) * * * ( H * * * (i ) (ii ) An y viny l chlorid e remove dfro ma loadin g o r

unloadin g lin e i n accordanc e wit h paragrap h (b)(l)(i ) o f thi s sectio n i s t o b e ducte dthroug h acontro l syste m fro mwhic h th 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

.

. (2 ) Slip gauges. Durin g loadin g o r unloadin g operations , th e viny l chlorid e emission s fro meac h sli 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 h acontro l syste mfro mwhic h th 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

.

. **** 8

. B y revisin g paragraph s (b)(3) , (b)(4) , (b)(5) , (b)(6) , (b)(7) , (b)(8) , (b)(9)(ii) , an d (c ) t o § 61.6 5 a s follows : §61.6 5 Emissio n standar dfo r ethylen e dichloride , viny l chlorid e an dpolyvinyl

. chlorid e plants

. A n owne r

o r operato r o f a n ethylen e dichloride , viny l chloride , and/o r polyviny l chlorid e plan t shal l compl y wit h th e requirement s o f thi s section

. (a ) * * * (b ) * * * (1 ) w * (2 ) * * * (3 ) Leakag e fro mpump , compressor , an dagitato r

seals : (i ) Rotating 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 h doubl e mechanica l seal s o r equivalen t

a s provide di n § 61.66

. If doubl e niechanica 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 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 pump ; b y ductin g an y viny l chlorid e betwee n th e tw o seal s throug h acontro l syste mfro m whic h th e 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 h th e provision s o f

4 0 CFRPar t

6 1 Subpar t

V demonstrate s complianc e wit h th e provision s o f

thi s paragraph

. (ii ) Reciprocating pumps. Viny l chlorid e emission s fro mseal s o n al l reciprocatin g pump 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

. I

f doubl e outboar d 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 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 pump ; 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 th e 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 h th e provision s o f 4 0 CFRPar t 6 1 Subpar t

V demonstrate s complianc e wit h th e provision s o f thi s paragraph

. (iii ) Rotating compressor. Viny l chlorid e emission s fro mseal s o n al l rotatin g compressor s i n viny l chlorid e servic e ar e t o b e minimize db y installin g compressor s wit h doubl e mechanica l seals , o r equivalen t

a s provide di n §61.66

. I f 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 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 th e 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 h th e provision s o f 4 0 CF RPar t 6 1 Subpar t

V demonstrate s complianc e wit h th 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

. I f 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 h th e provision s o f 4 0 CFRPar t 6 1 Subpar t

V demonstrate s complianc e wit h th e provision s o f thi s paragraph

. (v ) Agitator. Viny l chlorid e emission s fro mseal s o n al 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 h doubl e mechanica l seals , o r

equivalen t

a s provide di n § 61.66

. I f

doubl e mechanica l seal s ar e used , viny l chlorid e emissions-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 agitate d vessel ; 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 th e 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

. (4 ) Leaks from relief

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

valv e o n equipmen 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 h acontro l syste mfro mwhic h th 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

. (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 n th e manufactur e of bul kP.1 0

Federa l Registe r

/ Vol

. 51

. No
. 18 9 /

Tuesday

. Septembe r 30

. 198 6 /

Rule s an dRegulation s 3491 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 h loadin 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 h i s containe dtherei n i s t o b e reduce dt o a n amoun t whic h occupie s avolum e o f

n o mor e tha n 2. 0 percen t o f 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 n i s t o b e ducte dthroug h acontro l syste mfro m. whic h th 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 n a contro l devic e fro mwhic h concentratio 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 h tha 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 h th e provision s of

4 0 CFRPar t

6 1 Subpar t

V demonstrate s complianc e wit h th e provisions , o f

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 aof th e plan t wher e alea k

i s located

. A viny l chlorid e monitorin g syste mmean s adevic e whic h obtain 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 h ga s chromatograph y or , i f th e owne r

o r operato r assume s tha t

al l hydrocarbon s measure dar e viny l chloride , wit h infrare 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 o f

th e effectiv e dat e o f

thes e regulations , unles s awaive r

o f 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 not 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 e frequenc y o f monitorin g provide dfo r i n th e progra m ar e acceptabl e whe n the y ar e compare d wit h th 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 h i s acceptabl e whe n compare d wit h th e 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 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 h th e descriptio n ofth 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 e a s backgroun dconcentration s i n th e plan t ar e reduced

. (C ) I t contain s a n acceptabl e pla n o f actio n t o b e take n whe n alea k i s detected

. (D ) I t provide s fo r

a n acceptabl e calibratio n an 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 n o f

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

. Th e calibratio n i s t o b e don e wit h either : [1]A calibratio n ga 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 6 an d i n accordanc e wit h sectio n 7. 1 o f Tes t Metho d106 , 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 cylinder , 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 h cylinde 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

. "Hie 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

. I f

a ga s chromatograp h i 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 h calibratio n curv e a s describe di n sectio n 7. 3 o f Tes t Metho d106

. Th e requirement s i n sectio n 5.2.3.1

. an d5.2.3.2

. o f

Tes t Metho d10 6 fo r certificatio n o f

cylinde r standard s an dfo r establishmen t

an dverificatio n o f calibratio n standard s ar e t o b e followed

. (ii ) Fo r eac h proces s uni t

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

wit h Subpar t

V o f thi s part , excep t a s provide di n paragrap 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 complianc 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) , an 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 tha n 2.0 ' percent , a s determine' di n accordanc e wit h th 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 time s - requeste db y th e Administrator

. (B ) Fo r eac h performanc e test , a 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 e proces s uni t

shal l b e randoml y selecte d an dmonitore dwithi n 1 wee k b y th e method s specifie di n § 61.245(b ) o f thi s part
. I f a n instrumen t

readin g o f

10.00 0 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 e numbe r o f valve s i n VO C servic e fo r whic h leak s ar e detecte db y th e numbe r o f teste d valve s i n VO C service

. (C ) I f alea k i s detected , i t

shal l b e repaire di n accordanc e wit h § 61.242- 7 (d ) an d(e ) o f

Subpar t V o f thi s par t (D ) Th e result s o f

th e performanc e tes t shal l b e submitte di n writin g t o th e Administrato r

i n th e firs t

quarterl y repor t followin g th e performanc e tes t a s par t o f th e reportin g requirement s o f § 61.70

. (E ) An y proces s uni t

i n whic h th e percentag e o f

leakin g valve s i s foun dt o b e greate r

tha n 2. 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 h al 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 h operat e i n viny l chlorid e servic e les s tha n 1 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 th e monitorin g syste m require db y paragrap h (b)(8)(i ) o f thi s section

. Th e Administrato r ma y appl yP.1 1

3491 2 Federa l Registe r / Vol

. 51 , No
. 18 9 /

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 h th e requirement s o f

§ 61.242- 6 o f

Subpar t V
. * * a . * * (9) * * * (ii ) An y viny l chlorid e remove dfro m th e inproces s wastewate r i n accordanc e wit h paragrap h (b)(9)(i ) o f thi s sectio n i s t o b e ducte dthroug h acontro l syste m fro mwhic h th 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

. **** * (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 e i n equipmen t

4.7 5 m 3 (1,25 0 gal ) i n volum e fo r whic h a 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 d106 , a portabl e hydrocarbo n detector , o r a n alternativ e method

. Th e metho do f measuremen t

i s t o mee t

th e requirement s i n § 61.67(g)(5)(i)(A ) o r (8)(5)(0(B)

. 9
. Sectio n 61.6 6 i s revise dt o rea da s follows : § 61.6 6 Equivalen t equipmen 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 h hav e bee n demonstrate dt o hi s satisfactio n t o b e equivalen t

i n term s o f

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

complianc e wit h a specifi c paragrap h o f

thi s subpart

. 10

. B y revisin g paragraph 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 ) i n § 61.6 7 a s follows : §61.6 7 Emissio n tests . **** * (f ) Th e owne r

o r operato r shal l retai n a t th e plan t

an dmak e available , upo n request , fo r

inspectio n b y th e 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 ) a . . (i ) Fo r eac h run , on e sampl e i s t o b e collected

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

o r duc t diameter s downstrea man don e hal f diamete r upstrea mfro man y flo w disturbanc e suc h a s abend , expansion , contraction , o r visibl e flame. For 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+widt h Th e samplin g poin t

i n th e duc t

i s t o b e a t th e centroi do f

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

. **** * (2 ) Tes t Metho d10 7 o r

Metho d60 1 (incorporate db y referenc e a s specifie d i n § 61.18 ) i s t o b e use dt o determin e th e concentratio n o f

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

strea mfo r

whic h a n emissio n limi t

i s prescribe di n § 61.65(b)(9)(i)

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

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

o f stripper s (o r reactor s use da s strippers ) an dsample s ari dth e type s an dgrade s o f resi n t o b e sample dar e t o b e determine db y th e Administrato r

fo r eac h individua l plan t a t th e tim e o f

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

. (ii ) (iii ) Th e correspondiri g quantit y o f materia l processe db y eac h strippe r (o r reacto r 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 reacto r

openin g los s fo r

whic h a n emissio n limi t

i s prescribe di n § 61.64(a)(2 ) i s t o b e determined

. Th e numbe r o f reactor s fo r

whic h th e determinatio n i s t o b e mad e i s t o b e specifie db y 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 operation

.

(.)*•**"'' ' (ii ) A calculatio n base do n th e numbe r o f evacuations , th e vacuu minvolved , an dth e 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 postpolymerizatio n reactor s i n th e manufactur e o f

bul k resins

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

ma y b e approve db y th e Adriiinistrato r fo r determinin g reacto r

openin g los s fo r postpolymerizatio n reactor s i n th e manufactur e of

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 h a n emissio 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 h th e determinatio n i s t o b e mad e i s t o b e specifie db y 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 operation

. (i ) Fo r eac h batc h strippe 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 n resi 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(m mHg ) 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 h batc h strippe di n th e reactor , th e followin g informatio n i 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 dof stri p fro m th e followin g table :
Reacto r vapo r temperatur e CC )
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 8 3 H, 0 vapo r pres sur e (m m Hg ) 163. 8 171. 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 temperatur e C O
8 4 8 5 8 6 8 7 8 8 8 9 9 0 9 1 9 2 9 3 9 4 9 5 9 6 9 7 9 8 9 9 10 0 H. O pres 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 (m mHg ) o f viny l chlorid e i n reacto r a t en do f stri p fro mth e followin g equation : PPVC = 760-RV-VP W where : PPVC=partia l pressur e o

f viny l chloride , in m mH g 760=atmospheri c pressur e a t 0 "C , i n m

mH g RV=absolut e valu e o

f reacto r vacuum , in m mHg VPW=vapo r

pressur e o

f water , i n m mH g (C ) Th e reacto r

vapo r spac e volum e (m 3 ) a t en dof stri p fro mth e followin g equation :P.1 2

Federa l Registe r

/ Vol

. 51

. No
. 18 9 /

Tuesday

. Septembe r 30 , 198 6 /

Rule s an dRegulation s •ManH>B*>aK>MNaani.-iK>iB«nM*jMHBMV ^ 

### 3491 3

RVSV=RC-WV

- PVCV V 1,40 0
where : RVSV=reacto r

vapo r spac e volume , i n m ' RC=reacto r

capacity , i n m ' WV=volum e o f

wate r i n reacto r

fro mrecipe , i n m ' PVCW=dr y weigh t

o f polyviny l chlorid e i n reacto r fro mrecipe , i n 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 i n resi n afte r

stripping , i n pp m 10 ~ ' = conversio n facto r fo r pp m PPV C = partia l pressur e o f viny l chlorid e determine daccordin g t o paragrap h (g)(6j(ii](B ) o f

thi s section , i n mmH g RVS V = reacto r

vapo r spac e volum e determine daccordin g t o paragrap h (g)(6)(ii)(C ) o f

thi s section , i n m s l,00 2 = idea l ga s constan t i n g

— 'K/m m Hg—m 3 fo r

viny l chlorid e PVC W = dr y weigh t

o f polyviny l chlorid e i n reacto r fro mrecipe , i n k g 27 3 = conversio n facto r

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

temperature , i n " C

. (h)(1 ) Eac h piec e o f

equipmen t

withi n aproces s uni t

tha t ca n reasonabl 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 of equipmen t

i s no t i n viny l chlorid e service

. Fo r

apiec e of

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 h als o include s ga s volume s abov e liqui dstream s o r containe dliqui dvolumes

. Fo r purpose s of determinin g th e percen t viny l chlorid e conten t of 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 to.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 1,40

0 = typical density o

f polyviny l chloride , in kg/m J (iii ) Fo r eac h batc h strippe di n th e reactor , th e combine dreactor 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)(io-; 3 ) + (PPVC)(RVSV)(1.002 ) (PVCW)(27 3 + 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 of

equipmen t

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

. (ii ) If a n owne r

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

equipmen t

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

followin g th e procedure s i n paragrap 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 of

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 n exhaus t

gas(es) , havin g emissio n limit s tha t

ar e subjec t

t o th e requiremen t

of paragrap h (a ) o f

thi s section , ar e emitte dt o th e atmospher e withou t passin g throug h th e contro l syste man drequire dviny l chlorid e monitorin g system , th e viny l chlorid e conten t o f th e emissio n shal l b e calculate d(ir

i unit s of eac h applicabl e emissio n limit ) b y bes t

practica l engineerin g judgmen t

base do n th e discharg e duratio n an dknow n V C concentration s i n th 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 h 3-hou r

period , th e viny l chlorid e conten t

o f emission s subjec t

t o th e requirements o f

paragraph s (a ) an d (d ) o f thi s sectio n shal 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 of reportin g exces s emission s unde r § 61.70(c)(1)

. (f ) Fo r eac h viny l chlorid e emissio n t o th e atmospher e determine di n accordanc e wit h paragrap h (e ) o f thi s sectio n t o b e i n exces s of th e applicabl e emissio n limits , th e owne r o r operato r shal l recor dth e identit y of th e source(s) , th e date , time , an dduratio n ofth e exces s ernission , th e caus e of th e exces s emission , an dth e approximate , 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 Reporting

. (a)(1 ) Th e owne r

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

t o th e Administrato r

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

1 5 o f eac h yea r

arepor t i n writin g containin g th e informatio n require db y thi s section

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

. (2 ) I n th e cas e of

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

. I n addition , quarterl y report s shal l b e submitte dexactl y 3 month s followin g th e curren t

reportin g dates

. **** * (c ) * * * (1 ) Th e owne r

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

arecor do f

th e viny l chlorid e conten t

of emission s fo r eac h 3-hou r

perio ddurin g whic h averag e emission s ar e i n exces s of th e emissio n limit s i n § 61.6 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 h averag e emission s ar e i n exces s o f th e emissio n limit s specifie dfo r an y contro l syste mt o whic h reacto r emission s ar e require dt o b e ducte di n § 61.64(a)(2 ) o r

t o whic h fugitiv e emission s ar e require dt o b e ducte di n § 61.65(b)(i)(ii) , (b)(2)

. (b)(5) , (b)(6)(h)

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

. Th e numbe r

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

. If

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 contai n astatemen 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 n polyviny l chlorid e plant s fo r whic h astrippin g operatio n i s use dt o attai n th e emissio n leve l prescribe di n § 61.64(e) , th e owne r

o r operato r

shall

. \P.1 3

3491 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

. , (.)•'•• ' (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

A T = n 2 P C i M a i = l
where : A = 24-hou

r averag e concentratio n o

f typ e T resi n i n pp

m(dr y weight basis ) Q=Tota l productio n o

f typ e T resi n over

th e 24 : hou r period , in kg

. T=Typ e o

f resin

. M=Concentratio n o

f viny l chlorid e i

n on e sampl e o f grad e G i resi n in 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. , Gl , G2 , G3

. n=Tota l number

o f grade s o f resi n produce 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 h resi 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 retai n 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 of

al l dat a neede dt o furnis h th 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 n th e followin g information : (A) * * * (B ) * * * (3 ) Th e owne r

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

arecor do f

an y emission s fro meac h reacto 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 h reacto r

ar e t o b e determined

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

. If 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 h strippin g i n th e reacto r i s use dt o attai n th e emissio n leve l prescribe di n recor do f an y 24-hou r

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

. Th e viny l chlorid e conten t

foun di n eac h sampl e require db y paragraph s (c)(2)(i ) an d(c)(2)(ii ) b f

thi s sectio n shal l b e average dseparatel y fo r eac h typ e o f resin , ove r

eac h calenda r

da y an d weighte daccordin g t o th e quantit y o f eac h grad e o f

resi n processe db y th e stripper(s ) tha t

calenda r

day , accordin g t o th e followin g equation :

P C i Mci+P c M02 + . . . P G„ M 0 „

§ 61.64(f) , th e owne r

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

arecor do f

th e viny l chlorid e emission s fro mreacto r openin g los s an dal l source s followin g th e reacto r

use da s astripper

. (i ) On e representativ e sampl e o f polyviny l chlorid e resi n i s t o b e take n fro meac h batc h o f

eac h grad e o f

resi n immediatel y followin g th e completio n o f th e strippin g operation , an didentifie d b y resi n typ e an dgrad e an dth e dat e an dtim e th e batc h i s completed

. Th e correspondin g quantit y o f materia l

A T = n 2 PciCc i i = l Pe l Co < + P< 3 Cc 2 +

where : 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 n g viny l chloride/k g produc t (dr y weight basis)

. Q=Tota l productio n o

f resi n i n batche s fo

r whic h strippin g i s complete ddurin g th e 24-hou r period , i n kg

. T=Typ e o

f resin

. C=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 astrippe r

o f al l

. batche s o f grad e G | resi n fo

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

n § 61.67(g)(6))

. P=Productio n o

f grad e d resi n in th e batche s fo r whic h C i s determined , in kg

. G , = Grad e o

f resi n e.g. , Gi , Ga

, an dGs

. n=Tota l number

o f grade s o f resi n in batche s fo r whic h strippin g i s complete ddurin g th e 24-hou

r period

. Th e numbe r

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

. I f n o 24-hou r averag e combine dreacto r openin g los s an demission s fro mal l processe di n eac h strippe r batc h i 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 h i 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 dfo r eac h batc h strippe di n areacto 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 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

a s determine di n thi 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 h eac h batc h ar e t o b e average dseparatel y fo r eac h typ e o f resin , ove r

eac h calenda r

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

resi n strippe di n reactor s tha t

calenda r

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

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

-i-PcnCc n

source s followin g th e reacto r use da strippe r i n exces 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 h thi 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 n t o th e Administrato r fo r a minimu mo f

3 years :

* • ' * 4 - * * 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.1 4

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 dJune 6 , 1984 , fo r § 61.245(d)(1 ) an dIB

Rapprove d Septembe r

30,198 6 fo

r § 61.67(h)(1)

. * * *

. * *

. (b ) Th e followin g 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 dSeptembe r

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 " i

n § 61.24 1 o

f Subpart V to rea da s follows : . ' §61.24 1 Definitions

. a * * * * "Volatil e hazardou s ai r

pollutant " o r "VHAP " mean s asubstanc e regulate d unde r thi s par t fo r whic h astandar dfo

r equipmen t

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

. Benzen e i s aVHAP

. Viny l chlorid e i s a VHAP

. 16

. B y revisin g th e definitio n o f "connector " i

n § 61.24 1 o

f Subpart V a s follows : - §61.24 1 Definitions

.

* * * * * * • "Connector " mean s flanged , screwed , welded , o r

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

apip e lin e an d apiec e o f equipment

. For

th e purpos e of reportin g an drecordkeeping , connecto r means flange dfitting s tha t ar e no t covere db y insulatio n o r

othe r material s tha t preven t locatio n o

f th e fittings

. * *.*.- * * (K RDoc
. 86-2203 2 File d9-29-86 ; 8:4 5 am ] BILLIN G COD E 6560-50- MP.1 5 

# Ar-8 

# I - 2
Tuesda y Septembe r 30 , 198 6 V-A- l



# Par t I X 

# Environmenta l Protectio n Agency 4 0 CF R Par t 6 1 Nationa l Emission s Standard s fo r Hazardou s Ai r Pollutants : VIny i ChJor.de ; Equipmen t Leak s o f Volatil e Hazardou s Ai r Pollutants ; Fina l Rul e3490 4 Federa l Registe r / Vol . 51 , No . 18 9 /

Tuesday , Septembe r 30 . 196 6 / Rule s an d Regulation s ENVIRONMENTA L PROTECTIO N AGENC Y 4 0 CF R Par t 6 1 [AD~FRL-3044-5J Nationa l Emissio n Standard s fo r Hazardou s Ai r Pollutants : Viny l

_ . Chloride ; Equipmen t Leak s o f Volatil e Hazardou s Ai r Pollutant s AGENCY : Environmenta

l Protection . Agenc y (EPA) . ACTION : Fina

l rule . SUMMARY : The EP

A propose d administrativ e and clarifying revision a t o the nationa

l emissio n standar

d for vinyl chlorid e (VC) o n Januar y 9,1985 , (5 0 F R1182) . Certain revision s t o th e standar d ar e bein g promulgate

d i n Subpar tF throug h thi s actio n an d t

o a minor extent , i n Subpar

tV of 4 0 CF R Par t81 . Finally , throug

h thi s actio n the Agenc y i s denyin g th e petitio n of th e Natura l Resource s Defens e Counci l (NRDC ) and th e Environmenta

l Defens e Fun d (EDF ) whic h sough t reconsideratio n o

f th e EPA' s withdrawa

l of th e amendment

s t o the V C standard which wer e propose d i n 1977 . epracnv tDAT

E Septembe r 3

& 1988 . Under sectio n 307(b)(1 ) o f th e Clea n Ai r Act , judicia

l revie w of

th e action s taken b y thi s notic e i s availabl e only b y filing o f a petitio n for revie w in the United State s Cour

to f Appeal s for tii e District of Columbi a circuitwithi n 6 0 day s of today' s publicatio n o f

thi s rale. Unde r sectio n 307(b)(2) of

th e Clean Ai r Ac t the requirement

s tha tar e th e subjectfor today' s notic e ma

y no tb e challenge d late r i n civi l o r crimina

l proceeding s brough tb y EP A t o enforce thes e requirements . Incorpontio

o 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 a s o f Septembe r 3 a 1988 . AOORSSSCS : Background Information Document

Th e background-informatio n documen t(BID ) for th e promulgated standard s ma

y b e obtaine d fro

m th e U.S . EP A Librar y (MD-35) , Researc

h Triangl e Paric Nort

h Carolina 27711 , telephon e numbe

r (919) 541-2777 . Pleas e refe r t o "Viny

l Chloride Standard * Response s t

o Comment

s o n Januar

y 1985 Proposed Revisions, " EPA-450/3-86 - 004 . The BID. contains : (1 ) A summar y of al l publi c comment

s o n th e propose d revision s an d th e Administrator' s respons e t o th e comments , and (2) a summar y o f th e change s mad e t

o th e revise d standard sinc e proposal . Dockets. A docke tnumbe r A-81-21 , containin g information considere d b y EP A i n developin g p

f th e promulgated revision s t

o the standar

d fo r VC . i s availabl e for publi c inspectio n betwee n 8:0 0 a.m . and 4:0

0 p.m. , Monda

y throug h Friday , atEPA' s Centra

l DocketSectio n (LE-131) , Wes tTowe r Lobby , Galler y 1 . 401 M StreetSW. . Washington . D C 20460 . A reasonabl e fe e ma y b e charged , fo r copying . ran FURTHE

RINFORMATIO

N CONTACT : Fo r furthe r information concernin g th e enforcementaspect s of

th e promulgated revisions , contac tMr

. Richar d Biondi . Compliance Monitorin

g Branch . Stationar y Source Compliance Division , (EN-341) , U.S . Environmenta l Protectio n Agency , 40 1 M StreetSW. , Washington . D C 20469 , telephon e numbe r (202 ) 382 - 2828 . Fo r furthe r information concernin g the backgroun

d technical information supporting th e promulgated revisions , contac tMr

. Rober tE . Rosensteel . Chemical s an d Petroleu

m Branch . Emissio n Standard s and Engineering Divisio n (MD-13) , U.S . Environmenta l Protectio n Agency , Researc h Triangl e Park , Nort h Carolina 27711 , telephon e numbe r (919 ) 541-5671 . Fo

r other information o n the regulatio n o f V C an d th e promulgate

d revisions , contac tMr

. Fre d Dimmick, Standard s Developmen t Branch . Emissio n Standard s and Engineering Divisio n (MD-13) , U.S . Environmenta

l Protectio n Agency . Researc h Triangl e Park

, Nort h Carolina 27711 , telephon e number (919) 541-5578 . SUmjMHNTAR Y MTORMATKM : Summar y o f Revision s t

o th e Standar

d Th e V C standard wa s promulgated o n Octobe r 21.197 6 (4 1 F

R46560) and applie s t o plants producing ethylen e . dichlorid e (EDC

) vi a oxychlorination . plantproducing V C an d plant s producing polyviny l chlorid e (PVC ) o r othe r polymers containin g VC . Thes e plant s are subjec tt o a combinatio n o f performance , equipmen

tah d wor k . practic e requirement

s a tnumerous points i n th e manufacturin g processes . Base d o n it s revie w of

the technological basi s an d administrativ e aspect s o f th e origina l standar d EP

A propose d severa l administrativ e and clarifyin g revision s t o th e standar

d o n Januar

y 9,198 5 (5 0 F

R 1182) . Th e comment

s receive d an d action s taken o n thes e propose d revision s are discusse d below . Requirements

forLeak Detection and RepairPrograms A s propose d i n Januar

y 1985 . V C i s bein g adde d t o th e lis to f

substance s covere d b y 4 0 CF

RPar t6 1 Subpar

tV , which contain s regulation s fo r leak s fro m certai n equipmen

tin volatil e hazardou s ai r pollutant(VHAP ) service . Previously , plantowner s subjectt o th e V C standar

d wer e required t

o prepar e leak detectio n and repai r plan s for each V C and PV

C manufacturin

g facility an

d t o submitthes e plan s t

o EP A fo r review . A n analysi s o f

th e plan s submitte d reveale d tha

tthes e plan s varied widel y fro m plantt o plan tFurther

, som e plan s wer e considere d t

o b e inadequate and ineffectiv e approache s t o th e control o f V C leaks . Th e incorporatio n o f

Subpar tV b y the standard for V C emission s establishe s standardize d procedure s for identifyin g leak s o f V C and fo

r taking step s t

o minimiz e emissions.an d repai r leaks . Further , th e incorporatio n of

Subpar tV wil l als o accomplis h a standardizatio n of th e definitio n o

f whatconstitute s a leak for routine leak detection . However , t

o avoi d unnecessary change s t o existin g plan s which are effectiv e i n detectin g and repairing V C leaks , th e standar d contain s provision s whereb y an y facilit y ma y demonstrat

e throug h annua l (or mor e frequen tif

requeste d b y th e Administrator

) performanc

e test s tha tthe percentag e o

f leakin g valve s remain s a t2 percenta s a

n alternativ e t

o followin g th e Subpar

tV procedures . A n owne r may continu e t

o follo w th e existin g lea k detectio n and eliminatio n progra m for tin tfacilit

y for th e purpos e o f achievin g th e 2 percentperformanc e limi tHowever , existin g plan s ar e n o longe r require d no

r d o they necessaril y meetth e promulgate

d requirements . Compliance Test

Procedure and

Specific Opening Loss Umit

forPVC Reactors Used as Strippers Th e Federa

l Registe r notic e tha

t promulgated the. curren

tV C standard state d tha tV C escapin g fro

m PV C resi n tha tha s bee n stripped in the reacto r i s no tintende d t

o b e include d a s par

tof th e V C emission s measured under th e reacto r openin g los s requirements . Fo r nonbul k PV C reactors whic

h ar e use d a s strippers , however , n o metho d wa s specifie d t

o determine wha tpar

tof th e V C i n th e vapo r spac e of

th e reacto r had escape d after th e stripping wa s completed . Consequently , a metho d wa s propose d for determining th e reacto r openin g los s tha

taccounts fo

r stripping i n th e PV C reacto r for us e b y al l nonbol k resi n producers . After considerin g the comment s o n thi s propose d revision , EP

A decide d t

o promulgat

e th e revision . Anothe r propose d chang e i n th e standard affectin g PV C reactors use d a s Stripper s applie d t

o th e productio n of bul k PV C resins . Tw o separate vessel s ar e use d i n bulk resi n production , a "prepolymerization " vesse l and a "postpolymerization " vessel . Under th e standard promulgated i n 1976 . bot h of thes e vessel s wer e subjectt o th e reacto rP.1 7

Federa l Registe r /

Vo l 51 . No . 18 9 /

Tuesday . Septembe r 3 a 198 6 / Rule s an d Regulation s 3490 5 opening los s requirements . However , a n analysi s o f th e operatio n o

f prepolymerization vessel s reveale d tha t thes e reactors are opene d les s frequentl y tha n othe r type s o f

reactors , and tha tth e determination o f

gros s produc t(required fo r th e calculatio n o f reacto r openin g los s jl s impractical I n Januar y 1985 , EP

A propose d t

o apply th e equipmen topenin g los s requirements , rather tha n th e reacto r openin g los s requirements , t

o thes e PV C reactors . Th e equipmen

topenin g los s requirement

s are mor e appropriat

e fo r the operating characteristic s o f th e prepolymerization reacto r veaael s an d d o notchang 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 proposed revision , EP

A decide d t o promulgat

e u e revision . Clarification of

Definitions and Standards ..-•-• ' Base d o n th e EPA' s experienc e wit h administering the V C standar d severa l provision s o f

th e standard ar e bein g revise d t o reduc e an

y ambigmr

y i n thei r implementation . For example , specifi c definition s o f

"leak. " "exhaus tgas, " an d "relie f valv e discharge " ar e bein g adde d t o clarif y th e applicabilit

y of th e provision s o f

di e standard t o eac h o f thes e type s of

emissions . Similarly , t

o eliminat e mlmmAemitanMnfl*abou tth e applicatio n of

th e standard to purification equipmen

tfbDowiag£D C and V C formation , the definition s of "ED C purification " and "V

C purification " ar

e bein g revise d t

o mor a clearl y indicate whic h equipmen tk subjectt o th e standar d Anothe r revisio n bein g incorporate d ' int o th e standard make s i tclea r thatth e 1 0 ppm v standar d i s a Srhouravemg- s emissio n limi trather than a a instantaneou s limi tIh e performaoee . tes tprovisio n i n § 6167(gj(l ) ha s als o - bee n clarifie d to specif

y tha ttes tresult s shoul d reflec

ta s clos e to a 3-bour . averag e a s practicable . Further , th e 1 0 ppm v standar d regulation i s bein g revise d t o specif

y tha tailexhaes tga s . stream s ar e covere d b y n requiremen tintawfifig contro l devic e • bypas s streams . I n orde r to impientent- thi s -ctanficaoon , piuvisiuu s ar e als o bein g incorporate d mt o th e standar d ^o r calculatin g th e V C conten ta s bypasse d ? emissions . A final revisio n t o th e i v ppm v req^Dsremen

ti s tntesQe o t o prohibi tplant s bur

n dilutin g a V C exhaus tga s stream wit

h other exhaoa t gases'i n orde

r te mee tth e 1 0 ppm

v Hun t Under th e revise d standar d combining a s exhaust.slieai n containin g mor a tha n 1 0 ppm v V C with anothe r ga s strea m i s only allowe d whe n the combine d stream i s ducted t

o a contro

l device . The inproces s wastewate r requirement

s for gasholde r seal s are als o bein g revise d to exclud e th e expose d wate r sea l of

gasholders .

. Experienc e with th e V C standar d - ~tin1lfe>t69lhartMar0Tr**t*aiifti-+irrita expose d wate r sea l o

f a gasholde r ma

y excee d th e 1 0 ppm v limi tdurin g norma l operatio n an d ma

trompliance wit

h th e atmospheri c exposur e limi ti s no t practicabl e fo

r thi s source . Th e inproces s wastewate r stripping requirements , however , will'continu e to appl y to wastewate r after remova l iro m th e gasholde r sea l OtherAdministrative Revision* Othe r administrativ e revision s to th e standar d include : (1 ) Th

a eliminatio n o f th e 30-da y limi tfor existin g source s t o submitrequests fo r th e us e o f equivalen t control measures : {2 ) a chang e Iro m semiannua

l to quarterl

y reporting o f

V C emission s from resi n stripping , reacto r openings , an d exhaus tgases : an d (3 ) allowanc e o f

reporting of

period s o f exces s emission s instea d of al l emissio n measurements . Summar y of Impact s t o th e *3t—risr

d Revision s t o th e standard represen t administrativ e and clarifying changes ; n o major revision s wer e propose d Therefore , th e environmenta l energy . an d economi c impact s o f

th e origina

l standard remain generall y unchange d A summar y o f th e impacts ofth e origina l standar d ca n b e found i n th e preambl e t o the propose d standard revisions (5 0 FR1182) ; Piihu c Pai tl

i JpalfcM i Prio r to-proposa

l of ' revision s t o di e standar d intereste d parte s wer e - advise d bypnbU c nonc e fitth e Federa l Registe r (4 9 F

R26807. Jtm

e 29,19»* i o f

a meetin g o f

th e National A h Pollutio n Contro l Technique s Advisory Committee (NAPCTAC

) t o discus s th e revision s t o th e V C standard

. recommended fo

r piupusa L Trri * meetin g wa s hel d o n August30.1964 . Th e meetin g wa s ope n t o the publi c an d eac h attende e wa s *gtve

n a n opportunit

y -t o commento n th e revise d standard recommended tor proposal . .. .

. Th e revise d standard wa s propose d h i th e Federa

l Registe r o n JanoeryB , 1965 . in e yauucxuBanea i perio d wa s from Januar y 9, 1985 to Marc

h 25,1985 . A totai o f 1 6 commentletter s wer e receive d industr

y representatives submitte d mos tof

th e commen

tletters . Als o commenting wer e representative s of th e U.S . Congress , a Stat e Legislature , a State ai r pollutio n agenc y an d a n environmenta

l group . Th e comments hav e bee n considere d carefully an d where determined to b e appropriat e by EPA, change s hav e bee n mad e t o th e propose d revision s to th e standar d Significan tComment

s Sinc e Proposa

l Mos to f th e commen

tletter s containe d " ffiullipfe comments . I

n general ; th e comment s supported th e propose d administrativ e an d clarifyin g revisions , A detaile d discussio n o

f the comment

s and response s can b e foun d in th e BI

D fo r the promulgated standard , whic h i s reference d i n th e ADDRESSE S sectio n o f thi s preamble . The comment s an d response s i n th e BI

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

thav e bee n mad e t

o the revise d .standar

d betwee n proposa

l and promulgation . Almos tal l commenter

s addresse d th e propose d revision s t

o the relie f valv e discharg e standar d Althoug h man y o f th e ooramenter

s agree d wit

h th e actio n t o reforma tth e standar d severa l commenter

s objecte d t

o variou s aspect s o f th e discharg e limits . Base d o n consideratio n o f

thes e comments . EP

A decide d no tt

o promulgat

e the propose d revisio n t o th e relie f

valv e discharg e standar d Th e comment

s o n thi s an d othe r propose d revisions are addresse d in detai l i n th e BI

D fo r th e promulgate

d standard and i n summar

y i n th e nex t sectio n o f thi s preamble . One commenter requeste d reconsideratio n o f

th e withdrawal o f

th e amendment

s t o th e V C standard whic h wer e proposed i n 1977 . Thi s petitio n fo r reconsideratio n wa s base d o n objection s t

o di e Agency' s us e o

f dat a on.-cost s an d economi c impact

s in th e decisio n t o withdraw th e propose d amendments , an

d t o th e Agency' s determinatio n o f

th e technological basi s o f th e standar d Th e commenters state d tha tth e EPA' s action s i n withdrawin g th e propose d amendment s wer e inconsisten twit

h the requirement

s o f sectio n 11 2 o f

th e Clean Ai r Ac tA s discusse d farthe

r i n thi s preamble , th e Agency i s denyin g the petitio n for reconsideration . Proposa d Revision s to Relie f

Valv e Discharge Standar

d Th e EP A ha s decide d no tt o proaalgat e wrnhm s to th e relie f valv e discharg e standar d propose d i n th e Januar y 9.1965 . Federa

l Registe r nonce . Th e reyiaHms weal d hav e establishe d a differen ttvp e o f nesae i ica l limi tfor relief "valv e discharges . Th e decisio n to retain th e original relie f

valv e discharg e standard wa s mad e alte r considuiiu g th e revision s in-figh

to f publi c comment

s and othe r findings . Althoug h man y pubU c comment

s favore d th e propose d revisions , others oppose d th e change . I nP.1 8

3490 6 Federa l Registe r / Vol . 51 . No . 18 9 /

Tuesday , Septembe r 30 , 198 6 / Rule s an d Regulation s particular, several commenter s expresse d concern tha

tpreventabl e relief valv e discharge s woul d b e allowe d unde

r th e revise d standar

d and tha tthe performanc

e allowe d unde

r th e revise d standar

d coul d b e inconsisten t with-tha tallowe d under th e original -standar d Other-comment s ex ; concer n tha tth e revise d standar

d included n

o mechanism fo

r regulating ver y larg e relief valv e discharges . Th e basi s fo r the statementtha

ta large Agency resourc e commitmen ti s require d fo r enforcing th e relie

f valv e discharge standar

d wa s als o questione d A s a resulto

f thes e comments , EP

A reviewe d th e basi s fo

r th e recommendation s tha

tle d t o th e decisio n t o propos e t

o reforma tth e standard . Firs ta s discusse d i n th e Federa l Registe r notic e proposing revision s t

o the relief

valv e discharg e standar d (50 F R1187) . the revie w ofth e standard conducte d betwee n 198 0 an d 198 2 foun d tha tth e existin g standar

d resulte d i n a significantcommitmen tof. Agency resource s t

o th e revie w an d evaluatio n o

f discharge s o

f V C fro m relief valves . Becaus e th e existin g standar d allow s only "emergency " discharge s o

f V C fro m relief valve s (Le. , the relief valv e discharge coul d notb e avoide d by taking preventativ e measures) , ever

y discharge mus

tb e evaluate d individuall y t o determine whethe r the owne r or operato r o f th e facilit y ha s implemented , th e measure s necessar y to preven

ttha trelief valv e discharge . Durin

g the 4 to 5 year s sinc e th e revie w stud y wa s conducte d th e enforcemen

to f the relief

valv e discharge standar d ha s bee n mad e mor

e efficien t Thi s i s du e i n larg e par

tt o experienc e establishe d i n enforcing th e standar d A s a result, EP

A enforcemen

tpersonnel conside r implementatio n o f thi s standar d t o b e muc h les s resourc e and labo r intensive . A secon d conclusio n from th e 198 0 t o 198 2 study wa s tha

tindustr y di d no t hav e a clea r understandin g of wha tth e relief valv e discharg e standar

d require d and whatmeasure s they neede d t o implemen ti n order t o comply with th e standar d Durin

g th e 4 t o 5 year s sinc e th e review study , a numbe r of enforcementaction s hav e bee n take n agains tindividua

l plants for violation s o f th e standards . Thos e action s hav e culminated i n consen tdecree s whic h incorporat

e requirement

s for remedial action s t o preventfurthe

r relief valv e discharges . Th e provision s of thes e consen tdecree s hav e no tonl y reduce d th e numbe

r o f relief valv e discharge s at specifi c plants , bu

tthe y hav e als o serve d a s guideline s i n determining th e type s o f measure s appropriat

e fo r minimizing the discharges . Becaus e of

thes e tw o developments , EP A conclude d tha tthe origina

l findings of

th e review study ar e n o longe r vali d and shoul d not b e the basi s o

f a revision t

o th e forma

t o f th e relief valv e discharg e standar d Th e decisio n t o retain-th e existin g relietWalve discharg e standarda s a par t of th e standard for V

C emission s i s furthe r supported b y tw o additional advantage s tha

tth e existin g standar

d ha s ove r th e propose d revisions . Firs t th e existin g standard provide s tha tal l preventabl e relief

valv e discharge s ar

e subjectt

o enforcemen

t action . Under th e propose d revisions, which woul d hav e allowe d a smal l numbe r o f discharge s pe r yea r whethe r preventabl e or no titi s possibl e tha ta plantcoul d experienc e preventabl e discharge s and soi l b e i n complianc e wit h th e standar d A s pointe d ou ti n publi c comments , i

ti s theoreticall y possibl e tha

tdischarge s resulting fro

m gros s negligenc e coul d g o unpenalize d unde r th e revision s t

o th e standar d Th e EP A di d no tinten d thi s effectin th e propose d revisions. Th e retention of th e existin g relief

valv e discharg e standard allow s EP A t o continu e th e curren

t enforcemen

tapproach . Secon d th e existin g relief valv e discharg e standard provide s a bette r mechanis m for regulating large relief valv e discharges . Th e propose d revision woul d hav e allowe d a certai n numbe r o f relief valv e discharge s pe r year , without regar d t o th e siz e o r duration of

th e discharge . Consequentiy , a s lon g a s th e numbe r o f releases-wer e withi n th e numerica l limit s of'th e propose d revisions to th e standar d ther e wer e n o mechanism s i n th e standar d t o enforc e contro l of th e amoun

tof V C discharge d t o th e atmosphere . Under th e existin g relief valv e discharg e standar d however , th e duration an d siz e o f th e discharge are factors i n determining th e severit y of a violatio n o

f th e standar d A s a resul ta plantowne r o r operato r ha s a greate r incentiv e under th e curren t standar d fo r taking'actio n t

o reduc e th e quantit y of a discharge . I n summary, EP

A i s notpromulgatin

g th e revisions t

o th e relief

valv e discharg e standard which wer e propose d i n th e Januar

y 9,1965 . Federa

l Registe r notice . Thi s decisio n wa s reache d after consideratio n of publi c comment s received ; o n th e proposal , an d after a revie w of

th e basi s for th e decisio n t o reforma

tth e standar d Becaus e thi s revie w reveale d tha tth e burde n o n Agency resource s ha s diminishe d a s experienc e with th e implementatio n of

th e standard increased and tha

tundentandin g o f

th e provision s o f

th e existin g standard o n the par tof industr y shoul d b e clearer , th e necessit y for revisin g th e forma tof the relief valv e discharg e standard i s n o longe r apparen tThe existin g standard als o ha s th e advantage s of penalizin g al l preventabl e relief

valv e discharges , providing bette r regulatio n of large ..volume reUe

f valv e discharges, , and promotin g continuit

y i n the ongoing enforcemen

to f th e standard . I n som e instances , i

tma y b e possibl e fo r a plantoperato r t

o contai n a relief valv e discharg e an d t

o ven titt o a control device . Wher

e thi s can b e don e withoutexceedin g the exhaus tga s emissio n limito f

1 0 ppmv , EP A conclude d tha

tthi s approac

h shoul d b e encourage d an d therefore , th e discharg e shoul d b e exemp tfrom the relief valv e discharg e standard . Venting the discharg e throug

h a contro

l devic e can resulti n a 99. 9 percentreductio n i n th e V C contentof

th e relief valv e discharg e withou tinterfering wit

h th e contro l o

f V C emission s i n exhaus tgase s whic h ar e als o vente d throug

h the control device . Althoug

h complianc e wit

h the 1 0 ppm v standar d woul d exemp tth e discharg e from th e relief

valv e discharg e standar d exceedin g the 1 0 ppm v standar d woul d b e considere d bot h a violatio n o

f th e 1 0 ppm

v standar d and of th e relief valv e discharge standard . Denia l o f Petitio n Fo

r Reconsideratio n The NRDC and ED

F petitione d EP

A t o reconside r the decisio n t

o withdraw th e 197 7 propose d revision s t

o di e V C standar d Th e criteria fo

r granting such a petitio n are : (1 ) The petitio n mustb e base d o n information tha twa s notand coul d notreasonabl y hav e bee n presente d durin

g th e origina

l rulemaking ; an d (2) the petitio n must provid e substantial suppor tfo r th e argumen ttha tth e challenge d actio n shoul d b e change d Se e Denia l o f Petitio n t o Revis e NSP

S fo r Stationar

y Ga s Turbines . 4 5 F

R8165 3 (Decembe r 1 , 1980) . A s describe d below , thi s petitio n fail s t o meeteithe r criterion , and i ti s therefore , denie d Consideration of

Petition The NRDC/ED

F petitio n fo

r reconsideratio n of

th e withdrawal wa s base d o n fou

r mai n premises . First NRDC/ED

F objecte d t o th e EPA' s announcemento

f th e withdrawal o f

th e propose d amendment

s a s a final action , withou tbein g precede d b y a notic e whic h propose d th e withdrawal and allowe d for publi c commento n the . action . Secon d NRDC/ED

F objecte d t o th e influenc e of

cos tconsideration s in th e decisio n t o withdraw th e propose d amendmen tstatin g tha

tth e balancin g of cost s and benefits i n the settin g of the V C standard i s contrar

y t o th eP.1 9

Federa l Registe r /

Vol . 51 . No . 18 9 /

Tuesday . Septembe r 30 , 198 6 / Rule s an d Regulation s 3490 7 requirement

s o f Sectio n 11 2 o

f the Clea n Air Act . Third . NRDC/ED F too k issu e wit h wha ti ttoo k t o b e th e EPA' s assumption tha

tSectio n 11 2 o

f th e Clea n Air Ac testablishe s a requiremen ttha ta level o f contro l mus thave been "consistently achieved " in the pasti n -orde r t a for

m th e basis-of-ih e standar d — Finally . NRDC/ED

F state d tha

tthe EPA' s decision s o

n specifi c portions o

f th e propose d amendment

s were i n . conflic twit h th e evidenc e o

n thos e issues . I n th e firstobjection . NRDC/ED F stat e tha tthe proposed amendment s t o the 197 7 V C standar

d shoul d no

tb e withdraw n becaus e no notic e o

f suc h withdrawa

l ha d been published an

d ther e ha d been n o opportunit

y fo r publi c commen to n th e withdrawal . Durin

g th e 8 year s whic

h hav e elapse d sinc e the proposa l o f thos e amendments , ther

e ha s been ample opportunit y afforde d fo r public commen

tand inpu

to n the amendment

s and their withdrawal . Th e amendments , their protentia l consequences , an

d the decision s tha

tthe Agency migh

ttak e wit h regar d t o the m were al l befor e the public . Specifically , NRD C and ED F receive d draf

t document s relating t

o the rulemakin

g ' distributed prio

r t o the NAPCTAC meeting . Finally , NRDC di d notgiv e any supportin g rational e fo

r believin g tha

t furthe r opportunit

y fo r commen twoul d yiel d an y relevantne w informatio n or arguments . Therefore , EP

A doe s not believ e tha

tadditiona

l tim e o r provisio n fo r receivin g furthe

r publi c comment

s coul d hav e bee n either necessary or helpfu l fo r the resolution o

f the issue s involvin g the propose d amendment s t o the V C standar d Th e secon d issu e raise d b y NRDC / ED F involve s the-inclusio n o f cos t consideratio n i

n the EPA' s rulemakin

g deliberation s unde

r Sectio n 112 . The NRDC/ED

F maintains tha

tth e language o f Sectio n 11 2 whic

h requires th e standar d t o b e se ta ta leve l whic h provide s a

n "ampl e margi n o f safety " t o the publi c preclude s consideratio n of the cost s o f control . I n the EPA' s judgment th e V C standar d protects the publi c health with a

n ample margi

n o f safety withi n the meaning o

f Sectio n 112 . and EP A ma y conside r cos tand feasiblit y i n settin g th e standard . Th e EP A view s wer e explaine d in th e 1975-7 6 V C rulemaking . Th e NRDC/ED F provided n o he w informatio

n o n thi s issue . The NRDC/EDF s thir

d objectio n wa s th e EP A wa s incorrec

ti n statin g tha

ta leve l of control mustb e "consistentl y achieved " in orde

r t o for m the basi s o

f the standard . Specifically . NRDC/ED F pointe d t o the language in th e Federal Registe r notic e tha

t"10 ppm v represent

s the lowes tleve l o

f contro l whic h has bee n consistentl y achieved " a s indicating tha

tEP A wa s applying suc

h requiremen

ti n evaluatin g alternativ e exhaus tga s requirements . However , the basi s fo r EPA' s selectio n o

f 1 0 ppm v a s : the VCstandard fo

r exhaust, ga s

- emission s is-tha

tthis - level-o f

controls — the lowes tachievabl e emissio n limi t attainabl e o

n a never-to-be-exceede d basis . Althoug

h 5 ppm v ma y b e achieve d b

y som e system s ove r a limited tim

e period ; th

e existin g dat

a indicate th e thi s leve l of

contro l canno t b e maintained ove r a long-term , never to-be-exceede d basis , a s require d b y th e standards . I

n additio n t

o bein g achievabl e o

n a consistent , long-ter

m basis , th e 1 0 ppm v standar d wa s als o determined b y EP

A t o provid e th e publi c wit h th e ampl e margi

n of safet y require d by sectio n 112 . Therefore . EP A beleive s tha tth e standar d satisfie s the requirement

s o f sectio n 112 . Th e final point

s raise d by NRDC/ED

F i n suppor tofth e petitio n fo

r reconsideratio n addresse d thre e specifi c provision s o

f the propose d amendment s whic h wer e withdrawn . Th e NRDC/ED F state d tha tth e withdrawa

l of thes e provision s wa s in conflictwit h th e evidenc e before th e Agency . Th e first specifi c portion o

f the standar

d addresse d in the petitio n i s the . withdrawa

l o f the proposed 5 ppm

v emissio n limitfo

r exhaus tga s emissio n i n favo r of th e existin g 1 0 ppm

v emissio n limit. Th e NRDC/ED F state d tha tthe evidenc e in the recor d support s a finding tiiatthe 5 ppm

v limiti s achievabl e by ne w sources , and by •- ' existin g source s withi n 3 year s of promulgation . The petitio n als o pointe d t o th e mor e stringen temission , limitnot. b e foregone .

. The EP A decide d t

o maintai n th e 1 0 ppm v emissio n limitfo

r exhaus tga s emissio n fo

r thre e primar y reasons. Firs ta s state d above , th e 1 0 ppm v emissio n limi

tha s bee n determined t

o b e consistentl y achievabl e b y industry , wherea s the 5 ppm

v emissio n limit canno tb e consistentl y achieved . Second , eve n thoug

h th e limi to n maximu m emission s o

f V C i s se ta

t1 0 ppmv, th e averag e and mos tshort-ter m emission s wil l b e considerably , lowe r tha n thi s level . Thir d lowerin g th e emissio n limito n maximu m emissio n rates t o 5 ppm v woul d notsignificantly reduce th e averag e emissions , and therefore , adopting th e lowe r standar d wa s determined b y th e Agency no tt o hav e a significantimpac

to n emission s o f V C or , accordingly , o n publi c healt h risks. Th e petitio n fo

r reconsideratio n presente d no ne w evidenc e relevantt o th e Agency' s decisio n t

o withdraw th

e propose d 5 ppm

v emissio n limit. The secon d decisio n addresse d b y the petitio n fo

r reconsideration a s conflictin g wit

h the considere d evidenc e i s th e withdrawa

l of the 5 ppm

v

. . emissio n limi

tfo r oxychlorinatio n vents , Th a patUion-points-to-a-statemen ti n the . - 197 7 proposa l tha tthi s emissio n limit coul d b e attaine d base d o n th e us e o f oxyge n a s a fee d materia

l rathe r tha n air ; an d maintains tha

tno discussio n o

r evidenc e were presente d whic h woul d justif y withdrawa

l o f thi s proposal . I n th e Federa l Registe r (5

0 F R1185) , evidenc e wa s presente d by the Agency supportin g th e conclusio n tha

tmor e stringen tcontro l o f emission s fro

m oxychlorinatio n vents wa s unnecessary . First , n o ne w technologica

l control s hav e bee n develope d whic h ar e applicabl e t

o thes e vents . Second , th

e cost s of incinerating oxychlorinatio n ventstream s were reevaluate d an d determine d a s before , t

o b e unreasonabl e compare

d t o the small reduction i

n V C emissions . An

d finally , wit h the possibl e exceptio n o f on e plant , n o ne w EDC/V C plant

s wit h oxychlorinatio n reactors ar e expecte d t

o b e constructe d an

d an y tha tma y b e constructe d wil l b e adequatel y regulated b y th e requirement

s of ne w sourc e review regulations. No ne w informatio n wa s presente d i

n th e petitio n fo

r reconsideratio n relevantt o th e decisio n t o retain th e existin g oxychlorinatio n ven tstandard . Th e thir d decisio n which wa s addresse d i

n the petitio n fo

r reconsideration a s conflictin g wit h th e considere d evidenc e i s the withdrawa l o f the proposa

l t o lowe r di e residua

l V C limitfo r ne w dispersio n resin s fro m 2.00 0 ppm v t o 50 0 ppmv tand the limi

t fo r othe r ne w resin s fro

m 400 ppm

v t o 10 0 ppmv. Th e petitio n state s tha t existin g facilitie s ar

e currentl y meeting th e lowe r limits , an

d tha tbot h ne w and existin g facilitie s coul d b e brough tint o compliance wit

h the mor e stringen t limit s b y using the equipmen

tand procedures currentl

y use d by the leadin g facilities . The EP A withdrew th e proposed mor e ' stringen tstripping leve l requirement s fo r tw o main reasons . Th e firsti s tha tthe natur e o f PV C production make s it difficultt o distinguis h "new " fro m "old " resins. Resi n composition s ar e adjuste d routinely , an d completel y "new " resins ar e rarely , i

f ever , made . Second . EP

A conclude d tha

tther e i s no improved technology whic h woul d provid e th e basi s fo r mor e stringen tstripping requirement

s fo r al l resins . The technologie s which ar

e effectiv e fo

r specifi c resin s ma

y notb e effectiv e fo

rP.2 0

3490 8 Federa l Registe r / Vol . 51 , No . 18 9 /

Tuesday , Septembe r 30 . 198 6 / Rule s an d Regulation s othe r resins . The consequenc e of establishin g a mor

e stringen tstandar d woul d b e tha

tcertai n hard-to-strip resin s coul d n o longer b e produced . I n . the EPA' s opinion , suc

h a resultwoul d b e a n unwarranted economi c impac t whic h i s unnecessary t

o provid e a n , ampIe~margirTo

f saferyforpubti c health . No ne w relevantinformation wa s presented i

n the petitio n fo

r reconsideration . Administrative The docketi s a

n organized and complet e file o f al l the informatio

n considere d b y EP

A i n th e developmen t o f thi s rulemaking . Th e docketi s a dynamic file , sinc e materia l i s adde d throughou tth e rulemakin

g developmen t The docketin g syste m i s intende d t o allo w member

s of the publi c and industrie s involve d t

o identif y and locat e document

s s o tha tthey ca n effectivel y participat

e in the rulemakin

g process . Alon g wit

h th e statementof basi s and purpos e o

f th e propose d and promulgate

d standard s and EP

A response s t

o significantcomments , th e contents o

f the docke texcep tfo

r interagenc

y revie w materials , wil l serv e a s the recor

d i n cas e o f judicia l review [sectio n 307(d)(7)(A)| . Th e effectiv e date of

thes e revisions i s Septembe r 3 a 1686 . Sectio n 11 2 of th e Clea n Air Ac tprovide s tha

tnational emissio n standard s fo

r hazardou s ai r pollutant s becom e effectiv e upo

n promulgatio

n and apply t

o al l existin g and ne w sources . A s prescribed b y sectio n 112 . . promulgatio

n o f thi s standar

d wa s precede d by th e Administrator' s listin g o f V C unde r sectio n 11 2 o

f th e Ac to n Decembe r 24.197 5 (40 F

R59477) . I

n accordanc e wit

h sectio n 11 7 of

th e Ac t publicatio n o

f thes e promulgate

d revision s wa s precede d by consultatio n wit h appropriat

e advisory committees , independentexperts , and Federa l department

s and agencies .

. Informatio

n collectio n requirements . associate d wit

h thi s revise d regulatio n (thos e include d in 4 0 CF

RPar t61 , Subpar tA and Subpar

tF ) hav e bee n approved by th e Offic

e o f Managemen

t and Budge

t(OMB ) under th e provision s o f the Paperwor

k Reductio n Ac tof

I960 , 44 U.S. C 350 1 et

seq* ah d hav e bee n assigne d OM

B control numbe

r 0186 . Th e revise d standar

d i s estimate d t

o result in a paperwor

k burde n o f abou t3 6 person-year s which i s roughly th e sam e a s th e origina

l standar d Unde r Executiv e Orde

r 12291 , EP

A i s require d to judg e whethe r a regulation i s a "majo r rule " and therefore subjectt o certai n requirement

s of the Order

. Th e . EP A ha s determined tha

tth e revised regulation woul d resulti n non e of th e advers e economi c effects se tfort h in Sectio n 1 o

f the Orde r a s grounds fo

r finding a regulation t

o b e a "majo

r rule. " Th e revise d regulation:i s notmajo r because : (1 ) Nationwid e annua l complianc e costs - includin g capital charge s resulting fro

m th e standar

d total les s tha n $100 million : (2fthe^standar d - doe s notcaus e a majo

r increas e in price s o r production costs ; and (3) th e standard s d o notcaus e significant advers e effects o n domesti c competition , employmen tinvestment , productivity , innovatio n o

r competitio n i n foreig

n markets . Th e EP

A ha s submitte d thi s rulemakin g t o OM B unde r Executiv e Order 12291 . The Regulator

y Flexibilit

y Ac tof 198 0 requires th e identificatio n o f potentiall y advers e impact

s o f Federa l regulation s upo n smal l busines s entities . Th e Ac t specificall y requires th e completio n of a Regulator y Flexibilit

y Analysi s in thos e instances , where smal l busines s impact s ar e possible . Becaus e thi s revise d standar d impose s n o advers e economi c impacts , a Regulator

y Flexibilit

y Analysi s ha s no tbee n conducted . Pursuan tt o th e provison s of

5 U.S. C 605(b) . I hereb y certif

y tha tth e propose d rule wil l no thav e a significan teconomi c impacfo n a substantia l number of smal l entities . Lis to f Subjects i n 4 0 CF

RPar t61 . Ai r pollutio n contro l Asbestos , Benzene . Beryllium . Hazardou s materials . Mercury , Viny

L chloride . Dated * Septembe

r 24.1988 . L M I * Thomas

. Administrator. PAR T 61—NATIONA L EMISSIO N STANDARD S FO R HAZARDOU S AI R POLLUTANT S Fo r th e reasons se tfort

h i n th e preamble , 4 0 CF

RPar t6 1 i s amende d a s follows : 1 . Th e authorit

y citatio n fo

r Par t8 1 contunue s t

o read a s follows : Authority : Sees . 101.112.114 . lie , 301 . Clea n Ai r Ac ta a amende d (4 2 U.S. C 7401 , 7412.7414 ; 7418.7601) . 2 . Sectio n 61.6 1 i s amende d b y revising paragraphs (j) . 0) . (o ) and (p ) ' and b y addin g paragraphs (vj . (w) , (x) . (y) , an d (z ) t

o read a s follows : 99614 1 DefirtWona .

• • * « ' *

. • (J I "Inproces s wastewater " mean s an y wate r which , durin

g manufacturing o r processing , come s into directcontac t wit h vinyl chlorid e or polyviny l chlorid e o r results from th e production o r us e o f an y raw materia l intermediat e produc t finished produc tby-produc to r wast e produc tcontainin g vinyl chlorid e or polyvinyl chlorid e bu

twhic h ha s no t bee n discharge d t

o a wastewate r treatmen tproces s or discharge d untreated a s wastewater . Gasholde r sea l wate r i s no tinproces s wastewate r unti l i ti s removed from the gasholde r (1 ) "I n vinyl chlorid e service " mean s tha ta piec e o

f equipmen

teithe r contain s o r contact s a liqui d tha

ti s a leas t1 0 percentvinyl chlorid e by weighto r a ga s tha ti s a tleas t1 0 percen

tb y volum e vinyl chlorid e a s determined accordin g t o th e provision s o

f § 61.67(h) . Th

e provision s o

f 9 61.87(h ) als o specif

y ho w t o determine tha

ta piec e o

f equipmen

ti s notin vinyl chlorid e service . Fo r the purpose s o

f thi s subpart

, thi s definitio n mus tb e use d in plac e of

th e definitio n o

f "i n VHA P service " i

n Subpar tV o f thi s part. (o ) "Ethylen

e dichlorid e purification " include s any par

to f th e proces s o

f ethylen e dichlorid e production which follow s ethylen e dichlorid e formation , excludin g produc

tstorag e followin g the fina l finishing column . (p) "Viny l chlorid e purification " incude s any par

to f th e proces s o

f vinyl chlorid e production whic

h follow s vinyl chlorid e formation . * 4

• • • (v) "Relie f valve " mean s each pressur e relief devic e including pressure relief valves , ruptur

e disk s and othe r pressure relief

system s use d t

o protect proces s component

s from overpressure conditions . "Relie

f valve " doe s not includ e polymerizatio n shortsto p systems , referigerated wate r system s o r control valve s o r othe r device s use d t o control Ho

w t o a n incinerato r o

r othe r ai r pollutio n control device . (w) "Leak " means'any o

f several event s tha

tindicate interruptio

n o f confinemento f

viny l chlorid e withi n proces s equipmen tLeak

s includ e event s regulated under Subpar

tV o f thi s par t suc h as : (1 ) A n instrumen

treading of 10.00 0 pp m or greate r measure accordin g to Method 2 1 (se e Appendix A o f 4 0 CF R Par t60) : (2 ) indication s o

f liqui d dripping ; (3 ) a senso r detectio n o f failur e o f a sea l system , failur

e o f a barrie r fluid system , o r both ; and (4

) detectabl e emission s a s Indicated b y a n instrumen t readin g o f

greate r tha

n 500 pp m abov e background fo

r equipmen

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

o Tes tMetho d 2 1 (se e Appendix A of

4 0 CF RPar t60) . Leak

s als o includ e event s regulated unde r 9 61.65(b)(8)(i) fo r detectio n o f ambient concentration s i n exces s o f backgroundP.2 1

Federa l Registe r /

Vol . 51 , No . 18 9 /

Tuesday , Septembe r 30 , 198 6 / Rule s an d Regulation s 3490 9 concentration . A relie

f valv e discharg e i s nota leak . (x) "Exhaus

tgas " mean s any offga

s (the constituents of

whic h ma y consis t o f an y fluids , eithe r a s a liquid and/o r gas ) discharged directly o r ultimately t

o the atmospher

e tha twa s initiall y containe d i

n o r wa s in direc

tcontact wit h th e equipmen

tfor which exhaus t ga s limit s ar e prescribe d in 9 81.6

2 (a ) and (b) : 9 61.63(a) : 9 61.8

4 (a)(1) , (a)(2) , (b) . (c) . an d (d) : 9 81.85(b ) (l)(ii) , (b)(2) , (b)(5) . (b)(6)(ii) and (b)(9)(ii) . (y ) "Relie f valv e discharge " mean s an y nonlea k discharge throug

h a relie f valve . "Relie

f valv e discharge " doe s not includ e discharge s ducted t o a control syste m fro

m whic h th e concentratio n of vinyl chlorid e i

n th e exhaus tgase s doe s notexcee d 1 0 pp

m (averag e fo

r 3-hou r period) , o r equivalenta s provided i n 9 81.66 . (z ) "3-hou r period " mean s any three consecutiv e 1-hou

r period s (each hou

r commencing o n th e hour) . 3 . Sectio n 61.6

2 i s amende d by revisin g paragraphs (a

) and (b ) t o read a s follows : 961.6 2 Enriasto n standar d fo r ethyten e dtehlortd e plants . (a) Ethylene dichloride purification. Th e concentratio n o

f vinyl chlorid e in

each exhaus tga s strea

m from any equipmen tuse d i n ethylen e dichlorid e purification i s nott

o excee d 1 0 pp

m (averag e for 3-hou

r period) , excep ta s provided in 9 61.65(a) . Thi s requirement doe s notpreclud e combining o f exhaus t ga s stream s provided the combine d steam i s ducted throug

h a contro l syste m from which the concentratio n of vinyl chlorid e in . th e exhaus tgase s doe s notexcee d 1 0 ppm, or equivalen ta s provided i n 9 81.66 . Thi s requiremen t doe s notappl y t

o equipmen

ttha tha s bee n opene d i s ou

to f operation , an d me tth e requirementi n 5 61.65(b)(6)(i) befor e bein g opened . (b ) Oxychlorination reactor. Excep ta s provide d i n 9 61.85(a) , emission s of viny l chlorid e t o th e atmospher

e from eac h oxychlorinatio n reactor ar e nott o excee d 0.2 g/k g (0.000

2 lb/lb ) (averag e fo r 3-hou r period ) o

f th e 10 0 percent ethylen e dichlorid e produc tfro m th e oxychlorinatio n process . . 4 . Sectio n 61.8

3 i s revised t o read a s follows : 9 614 6 ' Emissio

n standar d fo r vtoy i - cruonos plains* . A n owne r o r operato r o f

a viny l chlorid e plan

tshal l comply wit

h th e requirements o f

thi s sectio n and 9 61.65 . (a ) Viny l chlorid e formatio

n and purification : The concentratio n of vinyl chloride i n each exhaus tga s strea m fro

m an y equipmen

tuse d in vinyl chlorid e formatio

n and/o r purification i s nott o excee d 1 0 pp

m (averag e fo

r 3-hou r period) , excep ta s provide d i n 9 61.85(a) . Thi s requiremen

tdoe s notpreclud e combining o

f exhaus tga s stream s provided th

e combined steam i s ducte d throug h a contro

l syste m from whichjhe

_ concentratio n ofviny l chlorid e ih th e exhaus tgase s doe s notexcee d 1 0 ppm. o r equivalen ta s provide d i n 9 61.86 . Thi s requiremen

tdoe s notapply t

o equipmen ttha tha s bee n opene d i s ou

t o f operation , and me

tthe requiremen

tin 9 61.65(b)(8)(i) befor

e being opened . 5 . Sectio n 81.6

4 i s amende d b y revising paragraphs (a) , (b) , (c) and (d ) t o read a s follows : 9 61.6 4 Emissio n standar d fo r polyviny l cMorM e plants . (a) Reactor. Th e followin g requirement

s apply t o reactors : (1 ) Th e concentratio n o f

viny l chlorid e in eac h exhaus tga s strea

m from eac h reacto r i s nott

o excee d 1 0 pp

m (averag e fo r 3-hou r period) , excep ta s provided i n paragrap h (a)(2) of thi s sectio n and 9 61.85(a) . (2 ) The reacto r openin g los s from eac h reactor i s no tt o excee d 00 2 g viny l chloride/k g (0.0000

2 l b viny l chloride/lb ) of polyviny l chlorid e produc texcep ta s provide d i n paragraphs (f)(1 ) and (f)(2) of thi s section , with the produc t determine d o n a dr

y solid s basis . Thi s requiremen

tdoe s no tapply t

o prepolymerizatio n reactor s i n th e bulk process . Thi s requiremen

tdoe s appl y t

o postpolymerizatio n reactor s i n th e bul k process , where u e produc tmean s di e gros s produc

to f prepolymerizatio n and postpolymerization . (3) Manua l ven tvalv e discharge . Excep tfo r a

n emergenc

y manua l ven t valv e discharge , ther

e i s to b e n o discharg e t

o th e atmospher

e from any manua l ven tvalv e o n a polyvinyl chlorid e reacto r i n viny l chlorid e service . A n emergenc

y manua l ven t valv e discharge mean s a discharg e t o th e atmosphere which coul d nothav e bee n avoide d by taking measure s t o preventthe discharge . Within 1 0 day s of an y discharg e t

o th e atmosphere fro

m any manua

l ven tvalve , th e owne r o r operator , o f tb e sourc e from whic h th e discharg e occur s shal l submitto th e Administrato r a reporti n writin g containin g lnformation.on th e source , natur e and caus e of

th e discharge , th e dat e an d time o f

th e discharge , th e . approximat

e tota l vinyl chlorid e los s durin g th e discharge , th e metho d use d fo r determining th e viny l chlorid e los s (the calculatio n o

f th e vinyl chlorid e loss) , the actio n tha

twa s take

n t o preven

tthe discharge , and measure s adopte d t o preventfutur

e discharges . (b ) Stripper. Th

e concentratio n o

f vinl y chlorid e i n eac h exhaus tga s strea m from eac h stripper i s nott o excee d 1 0 pp

m (averag e fo

r 3-hou r period) , excep ta s provided in 9 81.65(a) . JTh w requiremenJLdoexnoA_appJy to . equipmen ttha tha s bee n opened , i s ou

t o f operation , an

d me tthe requiremention 9 61.65(b)(8)(i) before bein g opene d (c ) Mixing, weighing, and holding containers. The concentratio n o f vinyl chlorid e in each exhaus tga s strea m from each mixing , weighing ; o r holding containe r i n vinyl chlorid e servic e which precede s th e stripper (or th e reacto r if the plan tha s no stripper

) in the plan

t proces s flo w i s no

tt o excee d 1 0 pp

m (averag e fo

r 3-hou r period) , excep ta s provided i n 9 61.65(a) . Thi s requiremen t doe s no tapply t

o equipmen

ttha tha s bee n opene d i s ou

to f operation , and me tth e requiremen

ti n § 61.65(b)(6)(i) befor e being opene d (d ) Monomerrecovery system. Th e concentratio n o

f vinyl chlorid e i n each exhaus tga s strea

m fro m each monomer recovery syste m i s nott

o excee d 1 0 pp

m (averag e fo

r 3-hou r period) , excep ta s provide d i n 9 61.85(a) . Thi s requiremen t doe s no tapply t

o equipmen

ttha tha s bee n opene d i s ou

to f operation , and metth e requirementi n 9 61.65(b)(6)(i) befor e bein g opene d a " * • a - # 6 . By revisin g paragrap

h (e) introductor

y tex tan d adding paragraphs (e)(3 ) and (f

) t o 9 61.6 4 t o read a s follows : 961.8 4 Emissio n standar d fo r polyviny l (e ) Sources following the stripperfs). Th e followin g requirements apply t o emission s o

f vinyl chlorid e t

o th e atmosphere fro

m th e combinatio n of

al l source s followin g the stripperfs ) [o r the reactorfs ) if

th e plantha s n o stripperfs) ] in th e plan

tproces s flo w including bu t notlimite d to , centrifuges , concentrators , blen d tanks , filters , dryers , conveyo r ai r discharges , baggers , storag e containers , and inproces s wastewater , excep ta s provide d i n paragrap h (f ) o f thi s section : (1)" * (2)** * (3 ) Th e provision s of

thi s paragrap

h apply a tal l times includin g whe n offspecificatio n o r othe r type s o f resins are made . (f ) Reacto r use d a s stripper . When a nonbul k resin reactori s use d a s a stripper thi s paragrap

h ma y b e applie d i n lie u of 9 61.6 4 (a)(2) and (e)(1) :P.2 2

3491 0 Federa l Registe r / Vol . 51 . No . 18 9 /

Tuesday , Septembe r 30 , 198 8 / Rule s an d Regulation s (1 ) The weighte d averag e emission s of vinyl chlorid e fro

m reacto r opening los s and al l source s followin g th e reacto r use d a s a stripper from al l grade s o f polyvinyl chlorid e resin stripped i n th e reacto r o n eac h calenda r day ma y no t exceed : - . 4i)2Uj2g/lr^(O00202lb/lb)ofpolyvinyl chlorid e produc tfor dispersio n polyvinyl chlorid e resins , excludin g late x resins , wit

h th e produc

t determined o n a dr

y solid s basis . (ii ) 0.4 2 g/k g (0.0004

2 lb/lb ) o f polyvinyl chlorid e produc tfor al l othe r polyviny l chlorid e resins , includin g late x resins , wit

h th e produc

tdetermined o n a dr y solid s basis . 7 . Sectio n 61.6

5 i s amende d b y revisin g paragraphs (a) , (b)(l)(ii ) and (b)(2) t o read a s follows : 961.6 5 Emissio n standar d fo r ethylen e cmocKi e puma . (a ) Relief valve discharge. Excep tfo r a n emergenc

y relief discharge , ther

e i s t o b e h o discharg e t

o th e atmosphere fro m any relie f

valv e o n any equipmen

t in vinyl chlorid e service . A n emergenc y relief discharg e mean s a discharg e which coul d no thav e bee n avoide d b y taking measure s t

o preventth e discharge . Within 1 0 day s of an y relie f valv e discharge , th e owne r or operato r o f th e sourc e fro

m whic h th e relief

valv e discharge occurs shal l submi tt o th e Administrato r a repor

ti n writing containin g information o n th e source , natur e and caus e o

f th e discharge , th e dat e and time of

th e discharge , th s approximat

e tota l vinyl chlorid e los s durin g th e discharge , th e metho d use d fo r determining th e viny l chlorid e los s (th e calculatio n of

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

twa s taken t

o preventthe discharge , an d measure s adopte d t o preventfutur

e discharges . (b) ' •" • (l)' " O J * * • (ii ) An y viny l chlorid e removed from a loadin g or unloadin g lin e i n accordanc e wit h paragrap

h (b)(l)(i ) o f

thi s sectio n i s t o b e ducted throug

h a control syste m fro m whic h th e concentratio n o

f vinyl chlorid e in th e exhaus tgase s doe s no t excee d 1 0 pp

m (averag e fo r 3-hou r period) , o r equivalen ta s provide d i n 9 61.66 . (2 ) Slip gauges. Durin

g loadin g o r unloading operations , the viny l chlorid e emission s fro

m eac h sli p gauge i n viny l chlorid e servic e are t o b e minimized b y ducting an

y vinyl chlorid e discharge d fro m th e sli p gaug e throug

h a control syste m fro

m which th e concentratio n of viny l chlorid e i n th e exhaus tgase s doe s notexcee d 1 0 pp

m (averag e for 3-hou

r period) , or equivalen ta s provide d i n 9 81.66 . 8 . By revisin g paragraphs (b)(3) , (b)(4) , (b)(5) . (b)(6) . (b)(7) . (b)(8) , (b)(9)(ii) . and (c ) t o 9 61.6 5 a s follows : 9 61.6 5 JEtatealo n standar d fo r ethylene.1.. . "dichloride , viny l chlorid e an d polyviny l cMortd e plants . A n owne r o

r operato r of

a n ethylen e dichloride . viny l chloride , and/o r polyviny l chlorid e plantshal l comply wit h th e requirement

s of thi s section . (a)** * [b]"* . (1)* " (2 ) * • * (3) Leakag

e from pump , compressor , and agitato r seals : (i ) Rotatingpumps. Vinyl chlorid e emission s from seal s o n al l rotating pump s i n viny l chlorid e servic e ar e t o b e minimized b y installin g sealles s pumps , pump s wit

h doubl e mechanical seal s or equivalenta s provide d i n 9 61.66 . I f doubl e mechanical seal s ar e use d viny l chlorid e emission s from th e seal s ar e t o b e minimize d b y maintainin g th e pressure betwee n th e tw o seal s s o that an y leak tha toccurs i s into th e pump : b y ducting an y viny l chlorid e betwee n th e tw o seal s throug

h a control syste m from which th e concentratio n o f viny l chlorid e i n th e exhaus tgase s doe s no t excee d 1 0 ppm : or equivalen ta s provide d i n 9 61.86 . Complianc e with th e provision s of

4 0 CF RPar t6 1 Subpar

tV demonstrate s complianc e wit h th e provision s o f

thi s paragraph . [a] Reciprocating pumps. Vinyl chlorid e emission s from seal s o n al l - reciprocatin g pump s i n viny l chlorid e servic e are to b e minimize d b y inatalHn g doubl e outboar

d seals , or equivalen ta s provided i n 961.6 a I

f doubl e outboar

d seal s ar e used , viny l chlorid e emission s from th e seal s ar e t o b e minimize d b y maintaining di e pressure betwee n th e tw o seal s s o tha

tan y lea k thatoccur s i s int o di e pump : b y ducting any viny l chlorid e betwee n th e tw o seal s throug h a contro l syste m from whic h th e concentratio n of

viny l chlorid e i n th e exhaus tgase s doe s notexcee d 1 0 ppm ; o r equivalen ta s provide d i n 961.66 . ' Compliance with th e provision s o f 4 0 CF RPar t6 1 Subpar

tV demonstrate s complianc e with th e provision s o f thi s paragraph . (iii ) Rotating compressor. Viny l chlorid e emission s from seal s o n al l rotating compressors i h vinyl chlorid e servic e ar e t

o b e minimize d b y installin g compressors wit

h doubl e mechanical seals , o r equivalen ta s provide d i n 961.66 . I f doubl e mechanica

l seal s ar e use d viny l chlorid e emission s fro m th e seal s ar e t o b e minimized b y maintaining th e pressure betwee n the tw o seal s s o tha

tan y lea k tha toccurs i s into tiie compresso r by ducting any vinyl chlorid e betwee n th e tw o seal s throug h a control syste m fro

m which th

e concentratio n o f

viny l chlorid e in the exhaus tgase s doe s notexcee d 1 0 ppm ; -o r eqttWateiir as-provide d in-f61-.86 : Compliance wit

h th e provision s o

f 4 0 CF RPar t6 1 Subpar

tV demonstrate s complianc e wit

h the provision s o

f thi s paragraph . (iv) Reciprocating compressors. Vinyl chlorid e emission s fro

m seal s o n al l reciprocatin g compressor s i n viny l chlorid e servic e ar

e t o b e minimized b y installin g doubl e outboard seals , or equivalen ta s provide d in 9 61.86 . I f doubl e outboar

d seal s are used , vinyl chlorid e emission s from di e seal s ar e t o b e minimized b y maintainin g th e pressure betwee n th e tw o seal s s o tha t an y lea k tha toccurs i s int

o the compresso r b y ductin g an y viny l chlorid e betwee n th

e tw o seal s throug

h a control syste m from whic h concentratio n o

f vinyl chlorid e in the exhaus tgase s doe s notexcee d 1 0 ppm : o r equivalen ta s provided in 9 81.66 . Compliance wit

h th e provision s o

f 4 0 CF RPar t8 1 Subpar

tV demonstrate s complianc e wit

h th e provision s o

f thi s paragraph . (v) Agitator. Vinyl chlorid e emission s from, seal s o n al l agitators in vinyl . chlorid e servic e ar

e t o b e minimized b y installin g agitators wit

h doubl e mechanica

l seals , or equivalenta s provide d i n 9 61.66 . I

f doubl e mechanical seal s are used , viny l chlorid e emission s fro

m the seal s ar

e t o b e minimized b y maintainin g di e pressure betwee n the two seal s s o tha t any lea k tha

toccurs i s into th e agitate d vesse l b y ducting any vinyl chlorid e betwee n th e tw o seal s throug h a control syste m fro

m which th e concentratio n of viny l chlorid e in the exhaus tgase s doe s no texcee d 1 0 ppm ; or equivalen ta s provide d i n 9 81.88 . (4) Leaks from relief

valves. Vinyl chlorid e emission s due t

o leak s fro

m eac h relie f

valv e o n equipmen

ti n vinyl chlorid e servic e shal l comply wit h 9 61.242- 4 of

Subpar tV o f thi s part . (5 ) Manual

venting af

gases. Excep ta s provide d in 9 61.64(a)(3) , al l gase s whic h ar e manually vente d from equipmenti n vinl y chlorid e servic e ar

e t o b e ducte d throug h a contro l syste m fro

m whic h th e concentratio n of

viny l chlorid e in th e exhaus tgase s doe s notexcee d 1 0 pp m ' (averag e fo

r 3-hou r period) ; o r equivalen ta s provide d in 9 61.86 . (6 ) Opening of

equipment

Vinyl chlorid e emission s from openin g o f equipmen t(includin g prepolymerizatio n reactors use d in th e manufactur e o f bul kFedera l Registe r/ Vo l 51 , No . 18 9 /

Tuesday . Septembe r30 . 198 6 / Rule s an d Regulation s 3491 1 resin s an d loadin g o runloadin g line s tha tar e no topene d to th e atmospher e afte reac h loadin g o runloadin g operation ) ar e t o b e minimize d a s follows : (i ) Befor e openin g an y equipmen tfor an y reason, th e quantit y o f viny l .

. chlorid e whic h i s containe d therei n i s t o b e reduce d t o a n amoun twhic h occupie s a volum e o f

n o mor e tha n 2 D percen to f th e equipment' s containmen tvotam e o r 0.095 0 cubi c meter s (2 5 gallons) . whicheve ri s larger , a tstandar d temperatur e an d pressure . (ii ) An y viny l chlorid e remove d from di e equipmen ti n accordanc e wit h paragrap h (b)(8)(i ) o f

thi s sectio n i s t o b e ducte d throug h a contro l syste m from whic h th e concentratio n o f viny l chlorid e i n th e exhaus tgase s doe s no t excee d 1 0 pp m (averag e fo r3-hoo r period) ; o requivalen ta s provide d i n 9 61.66 . (7 ) Samples. Unuse d portion s o f sample s containin g a tleas t1 0 percen t b y weigh tviny l chlorid e ar e te b e returned t o th e proces s o rdestroye d i n a contro l devic e from whic h concentratio n o f viny l chlorid e i n th e exhaus tga s doe s not - excee d 1 0 pp m (aveng e for 3-hoo r period ) o requivalen ta s provide d i n 9 61.86 . Samplin g technique s ar e t o b e suc h tha tsampl e container s i n viny l chlorid e servic e ar e purge d int o a close d proces s system . Complianc e wit h th e provision s o f

4 0 CF RPar t6 1 Subpar tV demonstrate s complianc e wit h th e provision s o f

thi s paragraph .

- (8 ) Leak detection and elimination. Viny l chlorid e emission s do e to leak s from equipmen ti n viny l chlorid e servic e ar e t o b e minimize d a s follow s (i ) A reliable an d accurat e viny l chlorid e monitorin g svste m shal l b e operate d fo rdetectio n o f

majo rleak s an d identificatio n o f

th e genera l o f th e plan twher e a lea k i s locate d A viny l chlorid e monitorin g syste m mean s a devic e whic h obtain s ai rsample s from on e o rmor e point s o n a continuou s sequentia l basi s an d analyze s th e sample s wit h ga a chromatograph y or , i f th e owne ro roperato rassume s tha ta U hydrocarbon s measure d ar a viny l rhinHdn , wit h infrare d spectrophotometry , flam e to n detection , o ra n equivalen to ralternativ e metho d Th e viny l chlorid e rmmrtorin g syste m shal l b e operate d accordin g to a progra m developedb y th e piss * owne r o roperator . Th e owne ro roperato rshal l submi ta descriptio n ofth e progra m t o th e AHmtnialmlu r wKMi i 4 8 day s 0 1 th e effectiv e dat e o f

thes e regulations , unles s a waive ro f

complianc e I s grante d unde r9 61.11 , o rth e progra m ha s bee n approve d an d th e Administrato rdoe s no trequesta review o f

th e program . Approva l o f a progra m wil l b e grante d b y th e Administrato rprovide d h e finds: (A ) Th e locatio n an d numbe ro f point s t o b e monitore d an d th e frequenc y o f monitorin g provide d for i a th e progra m ar e acceptabl e whe n the y ar e compare d .wit h thenumbe ro f

piece s o f equipmen t i n viny l chlorid e servic e an d siz e an d physica l layou to f

th e plan t (R ) f t/-nntnln « a HofinlHn m n f lunl r whic h i s acceptabl e whe n compare d wit h th e backgroun d concentration s o f viny l chlorid e I n th a area s o f tb e plan tt o b e monitore d b y th e viny l chlorid e monitorin g system . Measurement s o f backgroun d «*TM*"«»»»'>TW«HII M o f viny l chlorid e i n th e area s o f

th e plan tto b e monitore d b y th e viny l chlorid e monitorin g syste m ar e to b e include d wit h th e descriptio n o f

th e program . Th e definitio n o f

lea k for a give n plan tma y var y amon g th e differen tarea s withi n th a plan tan d I s als o t o chang e ove rtim e a s backgroun d concentration s i n th e plan tar e reduce d (C ) I t<-nm>Min

« a n acceptabl e pla a o l actio n to b e take n whe n a lea k i s detecte d (D ) Itprovide s for a a acceptabl e calibratio n an d maintenanc e schedul e fo rth e viny l chlorid e monitorin g syste m an d portabl 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 d wit h a concentratio n o f

viny l chlorid e equa l to th e concentratio n define d a s a lea k accordin g t o paragrap h (b)(8](i]P3 ) o f thi s section . Th e calibratio n i s t o b e don e wit h either : (J ) A calibratio n ga a mixtur e prepare d from th e gaae s specifie d i n section s 5.2. L an d &£2 . o f

Tes tMetho d 10 6 aa d a accordanc e wit h sactioaT J o f Tes t Metho d 108 , o r [2] A calibratio n ga s cylinde r standar d containin g th e appropriat e coacentratio B o f

viny i chtoride . Th e ga s compositio n o f

th e calibratio n ga s cylinde rstandar d i s t o hav e bee n certifie d b y th e maaatJactnret . Th e mamdactore rmos thav e recofltmende d a maxhna m shel f

fife fa reac h cylinde ra o tha tth e concentratio n doe s oo tchang e greate rtba a ±5 percen tfros tthe . certifie d value . Th e dat e o f ga s cylinde r preparation , certifie d viny l chlorid e 4jOBcaaBatioa , aadreooaBBsaade d m a triianm aet f

M s mus thav e bee a affixe d t s th e craade rbefor e shipmen t from th e manefactare rto tb a bayee . If « ga s chromatograp h i s ass a a s th e vjay i chlceid o nssauoB& s sssasa tthes e as s mixture s ass y b e daracd y see d t o prepar e a ^^»*'^'**^*^*"**flf^ > p TM Gaa&saao a carv e s s describe d i a sectio a 7 J al Tes t Metho d 106 . Th e requirement s fatsectio n 5A3.1 . an d 3JZX2. o f

Tes tMetho d 10 6 fo rcertificatio n o f

cylinde rstandard s an d fo restablishmen tan d verificatio n o f calibratio n standard s ar e to b e followe d (ii ) Fo reac h proces s uni tsubjec tt o thi s subpart , a forma l lea k detectio n an d repairprogra m shal l b e implemente d consisten twit h Subpar tV o f thi s par t excep ta s provide d i n paragrap h (b)(8)(iii ] o i thi s section . Thi s progra m I s t o b e implemente d withi n 9 0 day s o f th e effectiv e dat e o f

thes e regulations, unles s a waive ro f

complianc e i s grante d unde r961.11 . Excep ta s provide d i n paragrap h (b)(8)(ii)(E ) o f

thi s section , a n owne ro roperato rshal l b e exemp tfro m 9 81.242-l(d) . 9 61.242- 7 (a) , (b) . an d (c) . 9 61.246 , an d 9 61-24 7 o f

Subpar tV o f thi s par tfo ran y proces s uni ti n whic h th e percentag e o f

leakin g valve s i s demonstrate d t o b e les s tha n 2. 0 percen ta s determine d i n accordanc e wit h th e following : (A ) A performanc e tes ta s specifie d i n paragrap h (b)(8)(ii)(B ) o f

thi s sectio n shal l b e conducte d initiall y withi n 9 0 day s o f th e effectiv e dat e o f

thes e • regulations , annually , an d a ttime s j requeste d b y th e Administrator . ! (B ) Fo reac h performanc e tes ta i minimu m o f

20 0 o r9 0 percen ti whicheve ri s less , o f

th e total valve s i n VO C servic e (a s define d i n 9 60.48 1 o f : Subpar tW o f

Par t60 ) withi n th e proces s uni tshal l b e randoml y selecte d an d monitore d withi n 1 wee k b y the . method s specifie d i n 9 61.245(b ) o f thi s par tIf a a instrumen treading o f

1040 0 pp m o rgreate ri s measure d a lea k i s detecte d Th e lea k percentag e shal l b e j determine d b y dividin g th e numbe ro f valve s i n VO C servic e fo rwhic h leak s ! ar e detecte d b y th e numbe ro f teste d ! valve s i n VO C service . (C ) I f a lea k i s detecte d i tshal l b e repaired i n accordanc e wit h 9 61.242- 7 (d ) an d (e ) o f

Subpar tV o f

thi s par t (D l Th e result s o f

th e performanc e tes t shal l b e submitte d i n writin g t o th e Adrntrri'stratu

T i n th e firstquarterl y repor tfollowin g th e performanc e tes ta s par to f th e reporting requirement s o f 961.70 . (E J An y proces s uni ti a whic h th e percentag e o f

leakin g valve s .i s foun d to b e greate rtha n 2 0 percen taccordin g t o th e performanc e tes tprescribe d i n paragrap h (b)(8)(ii)(B ) o f

thi s sectio n mas tcompl y wit h al l provision s o f Subpar tV o f

thi s par tlwitht e 9 0 days . (iii ) Open-ende d valve s o rline s locate d o n multipl e servic e proces s line s whic h operat e l a viny l rMnwiA* servic e les s tha n 1 0 percen to l th e tim e ar e exemp tfrom th e requirement s o f i 61.242- 8 o f

Subpar tV , provide d th e open-ende d valve s o rline s ar e addresse d i a th s monitorin g syste m required b y paragrap h (b)(8Xi ) o f thi s section . Th e Administrato rma y appl yP.2 4

3491 2 Federa l Registe r / Vol . 51 , No . 18 9 /

Tuesday . Septembe r 30 . 198 6 / Rule s an d Regulation s thi s exemptio n t

o othe r existin g open ende d valve s or line s tha

tar e demonstrate d t

o requir e significant retrofitcos tt

o comply wit

h th e requirements o

f 9 81.242- 8 o

f Subpar tV . 

# —or~ ~ 

# -~

# — (ii ) Any vinyl chlorid e removed fro m th e inproces s wastewate r in accordanc e wit h paragrap

h (b)(9)(i ) of

thi s sectio n i s t o b e ducted throug

h a control syste m fro m which th e concentratio n o f vinyl chlorid e in th e exhaus tgase s doe s not excee d 1 0 pp

m (averag e fo r 3-hou

r period) ; or equivalen ta s provided i n 9 61.86 . (c ) Th e requirement

s ih paragraphs (b)(1) . (b)(2) . (b)(5) . (b)(8) , (b)(7) an d (b)(8) of thi s sectio n ar

e t o b e incorporated int

o a standar

d operating procedure , and mad e availabl e upon reques tfo r inspectio n b y th e Administrator . Th e standar d operating procedur e i s t o includ e provision s fo r measuring th e viny l chlorid e i n equipmen t4.7 5 m * (1,250 gal ) i n volum e fo r which a n emissio n limi

ti s prescribe d i n 9 61.85(b)(6)(i) after opening th e equipmen tand usin g Tes tMethod 106 , a portabl e hydrocarbon detector , or a n alternativ e metho d The metho d of measuremen

ti s to meetth e requirement

s in 9 61.87(g)(5)(i)(A ) or (g)(5)(i)(B) . 9 . Sectio n 61.6 6 i s revised t o rea d a s follows : 9 614 0 Eowvslsn

tsravlpnMn

tan d Upon writte n applicatio n from a n owne r o r operator , th e Administrato r ma y approve us e of

equipmen

to r procedures which hav e bee n demonstrated t o hi s satisfactio n t o b e equivalenti n terms o

f reducing viny l chlorid e emission s to the atmosphere t o thos e prescribe d for complianc e wit h a specifi c paragrap

h o f thi s subpar t 10 . By revisin g paragraphs ( C (g)(l)(i) . (g)(2) . (g)(3) introductor

y text , (g)(3)(f) . (g)(3)(iii) . (g)(5) introductor y tex tan d b y (g)(5)(ii ) adding paragraphs (g)(6 ) an d (h) i n 9 61.8 7 a s follows : 9 61.6 7 Emissio

n tests . » • » - - • • • • • » ? ' (f ) Th e owne r or operato r shal l retain a tth e plantand mak e available , upo n reques tlo r inspectio n b y th e Administrator , for a minimu m of 3 years , record s o f emissio n tes tresults an d othe r dat a neede d t

o determine ptnl««<nn f 

## tar* * (I)** * (i ) For eac h run , on e sampl e i s t o b e collecte d Th e sampling sit e i s t o b e a t leas ttw o stac k or duc

tdiameters downstrea m and on e half

diamete r upstrea m from any flo w disturbance such a s a ben d expansion , contraction , or visibl e flame. Fo

r a rectangula r cros s sectio n a n equivalen tdiameteri s to b e determine d from th e followin g equation : equivalen tdiameter- 2 (leTigth

) (wiffthX T length+widt

h Th e sampling pointi n the duc ti s t o b e at th e centroi d of

th e cros s section . The sampl e i s t

o b e extracte d a

ta rate proportiona

l t o th e ga s velocity atth e sampling poin tThe sampl e i s t o contai n a minimu m volum e of

50 liter s correcte d t o standar d condition s an d i s t

o b e take n ove r a perio d a s clos e t o 1 hour a s practicable . • * * • • (2 ) Tes tMethod 10

7 o r Method 60 1 (incorporated b y reference a s specifie d i n 9 61.18) i s to b e use d t

o determin e th e concentratio n of

vinyl-chlorid e i n eac h inproces s wastewate r strea m fo r whic h a n emissio n limi ti s prescribe d I n 9 81.65(b)(9)(i) . (3) When a stripping operatio n i s use d t o attai n th e emissio n limits i n 9 61.6 4 (e ) and (f) , emission s ar

e t o b e determine d usin g Tes tMetho d 10 7 a s follows : (1 ) Th e number of

strippers (o r reactors use d a s strippers ) an d sample s and th e type s an d grade s o f resi n t o b e sample d are t

o b e determine d b y th e Administrato r for eac h individual plant atth e time of

th e tes tbase d o n th e plant' s operation . - ' («)•• • (iii ) Th e correspondin g quantit y of materia l processe d b y eac h stripper (or reactor use d a s a stripper ) i s t o b e determine d o n a dr

y solid s basi s and b y a metho d submitte d t

o an d approve d b y th e Administrator. . (lv j . . .. . (4) * • • (5) Th e reacto r openin g los s fo r whic h a n emissio n limi ti s prescribe d i n 9 61.64(a)(2) i s to b e determine d Th e numbe r o f reactor s fo

r whic h th e determinatio n i s to b e mad e i s t o b e specifie d b y th e Administrato r fo r eac h individua l planta tth e time of

th e determinatio n base d o n tiie plant' s operation . (.)•-• • (ii ) A calculatio n base d o n th e numbe r of evacuations , th e vacuu

m involve d an d th s volum e of

ga s i n th e reactor i s hereb y approved b y th e Administrato r a s a n alternativ e metho d for determining reacto r openin g los s for postpolymerizatio n reactors i n th e manufactur

e of bul k resins. Calculatio n method s base d o n technique s othe r tha n repeate d evacuatio n bf

th e reactor ma

y b e approved b y th e Administrato r fo r determining reactor openin g los s fo r postpolymerizatio n reactors i n the manufactur

e o f bul k resins . (8) Fo r a reactor tha

ti s use d a s a stripper, th e emission s o

f vinyl chlorid e fro m reactor openin g los s and al l source s followin g th e reactor use d a s a stripper fo

r whidrairemissio n limiti s prescribe d in 9 61.64(f

) ar e t o b e determined . The numbe

r o f reactors fo

r whic h th e determinatio n i s t o b e mad e i s t o b e specifie d by th e Administrato r fo r eac h individua

l plan ta tthe tim e o f th e determinatio n base d o n the plant' s operation . (i ) Fo r eac h batc

h stripped in di e reactor, th e followin g measurement s are t o b e made : (A ) Th e concentratio n (ppm ) o f vinyl chlorid e in resin after stripping , measure d accordin g t

o paragrap

h (g)(3) of thi s section : (B) The.reacto r vacuu

m (m m Hg ) a t en d o f strip fro m plan tinstrument ; and (C ) Th e reactor temperatur

e (*C ) a t en d o f stri p fro m plantinstrument. (ii ) For eac h batc

h strippe d i n th e reactor, th e followin g information i s t o b e determined : (A ) The vapo r pressure (m m Hg ) o f wate r in the reactor a

ten d o f strip fro m th e followin g table :ill 

### r o
4 0 4 1 4 1 4 3 4 4 4 8 « e 4 7 4 8 4 * SO . S I 6 8 S 3 S4 S S 8 8 ST S S 9 9 a o s t Hi O va-co r P"-»» - Dur a 

## MS s u 58 4 61. 8 64 4 6* 4 71. 9 78 4 76. 6 83. 7 86. 0 a u 87. 2 101. 1 107. 2 112. 5 116 4 123 4 128 4 138. 1 142 4 14* 4 188. 4 H-MCtO T

l""a"fl*"a"a*" - atur a P Q
6 2 6 3 6 4 6 6 6 8 6 7 8 8 8 0 7 0 7 1 7 2 7 3 7 4 •* 7 6 7 7 7 8 7 8 6 0 6 1 8 2 S 3 H- 0 vraoo e prn tur a (m n Hg ) 163. 8 171. 4 178 4 187. 9 188 1 208. 0 214 4 223. 7 233. 7 243. 8 254. 6 288. 7 277 4 289. 1 M l . 4 314. 1 327. 3 341. 0 358. 1 389. 7 384. 9 400. 6 Reacto r t-wnprvItur a C O
6 4 8 8 6 8 8 7 8 8 6 9 9 0 9 1 9 2 9 3 9 4 9 6 9 8 9 7 9 6 9 9 10 0 * o sur a (m m Hg ) 418. 8 433. 8 450. 8 488. 7 487. 1 508. 1 525. 8 548. 0 587. 0 588. 6 810. 9 633. 9 657. 8 682. 1 707. 3 733 4 780. 0

. (B) Ih e partia

l pressure (m

m Hg ) o f viny l chlorid e i n reactor aten d of stri p frontth e followin g equation : PPVC - 760-RV-VP W where : PPVC-partia

l pressur e o f viny l chloride , i n m m Hg760•>atmospheri

c pressur e a t0 'C i n m m H g RVaiabaolut

a valu e o f reacto r vacuum , i n mmH g VPW—vapo

r pressur e o f water , i n m m H g (C) Th e reactor vapo r spac e volum e (m- 1 ) a ten d of strip fro m th e followin g equation :Federa l Registe r / Vol . 51 , No . 18 9 /

Tuesday , Septembe r 30 . 198 6 / Rule s an d Regulation s 3491 3

RVSV-RC-WV PVC

W wo o

RVSV—reacto

r vapo r spac e volume , i n nr

* RC

—reacto r capacity , i n .m* . ~WVSvoIume o f

watert n reacto r tra

m rectpe r mm* PVCW—dr

y weighto

f polyvinyl chloride i n reacto r fro

m recipe , i n k

g
CWWMVCH1D _, ) +

where : C— g viny l chloride/k g polyvinyl chlorid e produc t PPMV C • « concentratio n of-viny

l chlorid e I

n resi n afte r stripping , i n pp m 10 r**-—eu-ave

r sio u facto r for ppa

i PPVC—partia

l ore-Mar e o f vinjr l chlorid e detanuiae d accordin g l o para-grap h (gXeHfiKB ) o f thi s seetio a i n -B B Hg RVSV—reacto

r vapo r apace volum e determine d acnordin

g to paragrap

h (g)(8PHC ) o

f Ihl * section , i n m* 1,00 2 - idea l ga s constan tl a g-'XJmm Hg—m * fo r viny l chloride PVCW—dr

y warigfa tat paly-dray i ehlotid e i n reactor from recipe, i n kg - 273—conrenia

Rfacto r fo r *

C t o 'K RT—reacto

r temperature, in *

C (h)(1 ) Eac h piec e o f

equipmen twithi n a proces s uni ttha tca n reasonably contai n equipmen ti n viny l chloride . servic e i s presume d t o b e i n viny l chlorid e servic e unles s a n owne r o r operato r demonstrate s tha tth e piec e o f equipmen ti s no ti n viny l chlorid e service . Fo r a piec e o f

eqorpmen tt o b e considere d no ti n viny l chlorid e service , i tmus tb e determine d tha tth e percen t viny l chlorid e conten tca n b e reasonably expecte d no tto excee d 1 0 percen tb y weigh tfo r liqui d stream s o r containe d liqui d volume s an d 1 0 percen tb y volum e for ga s stream s at containe d ga s volumes , whic h als o include s ga s volume s abov e liqui d stream s o r containe d liqui d volumes . Fo r par-pose s o f detenmhin g th e percen tviny l chlorid e conten to f

di e proces s fluid tha ti s coatamedhtorconiscB . equipment , procedure s tha tcoasera . to th e method s describe d i n AST M Metho d D-228 7 (incorporate d b y referenc e a s specifie d i n S 61.16 ) shal l b e used . fZJfl ) A a owne r o r operato r ma y us e engineerin g judgmen trather tha n d m procedure s i n paragrap h (h)(1 ) o f thi s seetio a to demonstrat e tha tth e percen t viny l chlorid e conten tdoe s ao texcee d 1 0 percen tb y weigh tfo r liqui d stream s an d .1 0 percen tb y volum e fo r ga s streams , provide d tha tth e engineerin g judgmen tdemonstrate s tha tth e vmy i 1,400—typica l densit y o f polyviny l chloride , i n kg/m * (iii ) Fo r eac h batc h strippe d i n th e reactor, th e combine d reacto r openin g los s an d emission s from al l source s followin g th e reacto r use d a s a strippe r Jg^J»fj^tB^n« d usin g th e following equation: ' " ~ •

(PPVCKRVSV1(l,002

) (PVCW)(273+RT )

chlorid e conten tclearl y doe s no texcee d 1 0 percen tWhe n a n owne r o r operato r an d th e Aadmmistrato r d o no tagre e o n whethe r a piec e o f

equipmen ti s no ti n viny l chlorid e service , however , th e procedure s i n paragrap h (h)(1 ) o f thi s sectio n shal l b e use d to resolve th e disagreemen t [il] I f a a owne r o r operato r determine s tha ta piec e o f

equipmen ti s i n viny l chlorid e service , th e determinatio n ca n b e revise d onl y afte r following th e procedure s i n paragrap h (h)(1 ) o f thi s seetioa . . (3 ) Sample s use d i a delerininin g th e percen tviny l chlorid e conten tshal l b e representative o f

th e proces s fluid tha t i s containe d i n o r contact s th e equipmen t 11 . B y addin g paragraph s (d), ' (e ) an d (f J to 5 61.6 8 a s follows: 961.6 S Emissio n monitoring .

* * * '

. *

. • (d ) Whe n exhaus tgaafes) , havin g emissio n bant s tha tan tsubjec tt a th e requiremen tof

* paragrap h (a ) o f

thi s . section , ar a emitte d t o th e atmospher e withou tpassin g throug h th e contro l syste m an d required viny l chlorid e monitorin g system , th e viny l chlorid e conten to f

th e emissio n shal l b e .eatenlate d (i a unit s o f

eac h applicabl e emissio n nmrt ) b y bes tpractica l engineerin g -judgmentbase d o a th e discharg e duratio n an d know n V C cuuceimauuu s i n m e errecre a equipmen ta s detennine d i a accordanc e

. wit h 9 6L67(h ) o r othe r acceptabl e method . T ''

. - - •-.*,.

. '': ' [..-A.. - ' . (a ) Fo r eac h 3-hoo r period , th e vfaty l chlorid e ooateatafa-aaisakwissBb-JBC tt o th e reoainatsBt s o f

paragraph s (a ) aad .

. (d | o tthi s seetio a saal i tM-everage a (weighte d accordin g t o th e proportio n o f time tha teadssJoa s war e oontiaooasl y monitore d an d tha tsanss-ma s bypasse d - •i s -niailimiou s monitor ) for psrpese s o f reporting< S 6170(c)(1) . (f ) Fo r eac h viny l chlorid e emissio n t o th e atmospher e determine d i n accordanc e wit h paragrap 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 d th e identit y o f th e source(s) , th e date , time, an d duratio n o f th e • exces s emission , th e canae^oLthe.excess . _ emission , an d th e approximat e tota l viny l chlorid e los s durin g th e exces s emission , an d th e metho d use d fo r determinin g th e viny l chlorid e loss . Thi s informatio n shal l b e retaine d an d mad e availabl e fo r inspectio n b y th e Administrato r a s required b y § 61.71(a) . 12 . In S 61.7 0 b y revising th e sectio n tide from "Semiannua l report " t o "Reporting" , an d b y revising paragraph s (a) , (c)(1) , (c)(2 ) introductor y tex t (c)(2)(iii) . (c)(2)(iv) . (c)(2)(v) , (c)(2)(vi ) introductor y tex tan d (e)(3 ) an d als o b y addin g (c)(4 ) t o read a s follows : 981.7 0 Reporting . (a)(1 ) Th e owne r o r operato r o f an y sourc e t o whic h thi s subpar tapplie s sha U submi tto th e Administrato r o n Marc h 15 , Jun e 15 . Septembe r 15 , an d Decembe r 1 5 o f

eac h yea r a repor ti n writin g containin g th e informatio n require d b y thi s section . Th e first report i s t o b e submitte d followin g th e firstful l 3-mont h reportin g perio d afte r th e initia l reporti s submitte d (2 ) h i th e cas e o f

a n existin g source , th e approve d reporting schedul e shal l b e used . I n addition , quarterl y report s shal l b e submitte d exactl y 3 month s following th e cunen treportin g dates .

- . --. . - • - . .

. («•)••• • ' (1 ) Th e owne r o r operato r shal l includ e h i th e repor ta recor d o f th e viny l chlorid e conten to f emission s for eac h 3-hou r perio d durin g whic h averag e emission s ar e i n exces s o f th e emissio n limit s i n S 61.8 2 (a ) o r (b) . 8 61.63(a) . o r S 81.8 4 (a)(1) . (b) , (c) . o r (d) . o r durin g whic h averag e emission s ar e i n exces s o f th e emissio n limit s specifie d fo r an y contro l syste m to whic h reactor emission s a n require d to b e ducte d i n S.61.64(a){2 ) o r t o whic h fugitiv e emission s ar e require d to b e ducte d i n I «L66(bKiKiiIv M2). (b)(5) . (b)(6)(ii) . o r (b)(9)(H) . Th e numbe r o f 3-hou r period s fo r whic h averag e emission s wer e determine d darin g th e reportin g perio d sha U b e reported. If

eatission s i n exces s o f th e entiesio n limit s ar e ao tdetected , th e reportshal l contai n a statemen ttha t n o exces s earisaion s hav e bee n detected . Th e enassioo s ar a t o b e determine d i a accordanc e wit h J 6148(e) . (2 ) l a polyviny l chlorid e plant s for whic h s strippin g operatio n i s use d t o attai a th e -eoiissio a leve l prescribe d i a S 6L64(e) . th e owne r o r operato r shal l3491 4 Federa l Registe r / Vol . 51 , No . 18 9 /

Tuesday , Septembe r 30 , 198 6 / Rule s an d Regulation s includ e in the repor

ta recor d o f the viny l chlorid e conten ti n the polyviny l chlorid e resin. (!)••• ' (Bl * * ' (iii ) Th e vinyLchloride conten ti n eac h -sample-i s ton e determine d b y Tes t— Method 10

7 a s prescribe d in 581.67(g)(3) . (iv) [Reserved ] (v)Th e reportt

o th e Administrato r b y th e owne r o r operato r i s t o includ e a

At XP«M o i- 1 

### Q T O r where : A—24-hou r averag e concentratio

n o f typ e T resi n i n pp m (dr y weigh tbasis ) Q—Tota l productio n o f typ e T resi n ove r th e ' 24-hou r period , i n kg . T—Typ e o f resin . . M—Concentratio

n o f viny l chlorid e i n on e ' sampl e o f grad e C i resin i n ppm . P—Productio

n o f grad e G i resin represented b y th e sample , i n kg . Gi-Grad e o

f resin : e.g., Gl , G2

. G3 . n—Tota l numbe r o f grade s o f resin produce

d durin g th e 24-hou r period . Th e numbe

r of 24-hou r averag e concentration s fo

r eac h resi n typ e determine d durin

g th e reporting perio d shal l b e reported . I

f n o 24-hou

r averag e resi n viny l chlorid e concoitration s i n exces s of th e limits prescribe d i n § 8144(e ) ar

e measured , th e repor

tshal l stat e tha tn o exces s resi n viny l chlorid e concentration s wer e measured . (vi ) Th e owne r or operato r shal l retain atthe sourc e and make availabl e for inspectio n b y the Administrato r fo r a minimu m of 3 year s record s of

al l dat a neede d t o furnis h th e informatio n require d b y paragrap

h (c)(2](v) o f

thi s section . The record s ar

e t o contai n th e followin g information : ' (A) - " • . (B) • * • (3) Th e owne r or operato r shal l includ e i n th e repor

ta recor d o f an y emission s from eac h reacto r opening , i n exces s o f th e emissio n limits prescribed i n S 61.84(a)(2) . Emission s ar a t o b e determine d i a accordanc e wit h S 61.67(g)(5) . excep ttha

temission s fo r eac h reactor ar

e t o b e determined . Th e number o f reactor opening s daring th e reportin g perio d shal l b e reported. I f emission s i n exces s of

th e emissio n limit s ar a no tdetected , th e repor

tshal l includ e a statemen ttha texces s emission s hav e no tbee n detected . (4) I n polyviny l chlorid e plant s for whic h stripping i n th e reactor i s use d t o attai n th e emissio n leve l prescribe d i n recor d of any 24-hou

r averag e resi n vinyl chlorid e concentration , a s determined i n thi s paragraph , i n exces s o f th e limits prescribe d i n § 61.64(e) . Th e viny l chlorid e conten tfoun d i n eac h sampl e required b y paragraphs (c)(2)(i ) and (c)(2](ii ) of

this-sectioashal l b e 'average d separatel y fo r eac h type^of- — resin, ove r each calenda r day an d weighte d accordin g t

o the quantit

y of eac h grade of

resi n processe d b y the 8tripper(8)-tha

tcalenda r day , accordin g t o th e following.equation :

Po tHa+Po j Ma» + . . . PQ . MQ .
9 61.84(f) , th e owne r o r operato r shal l includ e i n th e reporta record of th e viny l chlorid e emission s from reactor opening . los s and al l source s followin g th e reactor use d a s a stripper . (i) One representativ e sampl e of polyviny l chlorid e resi n i s t o b e taken fro m eac h batch o

f eac h grad e of

resin immediatel y followin g th e completip n of th e stripping operation , and identifie d b y resi n typ e and grad e and th e dat e and time th e batch i s completed . Th e correspondin g quantit

y o f materia l processe d i n each stripper batc h i s t o b e recorded and identifie d by resi n typ e and grade and th e dat

e and tim e the batc h i s completed . (ii ) Th e vinyl chlorid e conten ti n each sampl e i s t

o b e determined by Tes t Method 10

7 a s prescribe d i n -rffr67(|)(3) 7 (iii ) Th e combine d emission s from reacto r openin g los s and al l source s followin g the reacto r use d a s a stripper ar e t o b e determined fo

r each batc

h stripped i n a reactor accordin g t o th e procedur e prescribe d in 5 81.87(g)(8) . (iv ) The reportt

o the Administrato r b

y th e owne r or operato r i s t o includ e a recor d o f any 24-hou

r averag e combine d reactor opening los s and emission s from al l source s followin g the reacto r use d a s a stripper a s determined i n thi s paragraph , i n exces s o

f di e limits prescribe d in 181.64(f) . Th e combine d reactor openin g los s and emission s from al l source s followin g the reacto r use d a s a stripper associate d wit

h each batc

h ar e t o b e average d separatel y fo r each typ e of resin, ove r each calenda r day and weighte d accordin g t o the quantit

y -j f eac h grad e o

f resin stripped in reactors tha

tcalenda r day a s follows : Fo r each * typ e of resin (suspension , dispersion , latex , bulk, other) , th e followin g calculatio n i s t

o b e performed :
n XPo- C i - t Pa»Coi+P«C» + . . . -t-PteCo . O r Q » where : A—24-hou r averag e combine d reacto r openin g los s an d emission s fro m al l source s followin g th e reacto r use d as a . stripper. , i n g viny l chloride/k

g produc t (dr y weigh tbasis) . Q—Tota l productio n o f resin.in batche

s fo r whic h strippin g i s complete

d durin g th s 24-hou r period , i n kg * T-Typ e o f resin. G—Averag

e combine d reacto r openin g los s an d emission s from ai l source s followin g tiw-reacto r use d as a strippe

r o f al l batche s o f grad e G , resin fo r whic h strippin g i s complete

d durin g th e 24-hou r period , in gvtey tchloride/k

g produc t (dr y weigh tbasis ) (detenniiie

d accoram g t o procedur e prescribe d i n 161.87(g)(6)). . P-Productio

n o f grad e Q resi n i n th e batche s fo r whic h C i s determined

, i n kg . d-Grad e o

f resin e.g , G...G*

. an d G» . n—Tota l numbe r o f grade s o f resin i n batche s fo r whic h strippin g i s complete

d durin g - th e 24-hou r period . Th e numbe

r of 24-hou r averag e •'. emission s determine d durin g th e reportin g perio d shal l b e reporte d I f n o 24-hour averag e combine d reactor openin g los s and emission s from al l source s followin g th e reactor use d a stripper i n exces s o

f the limit s prescribe d i n S 61.64(f

) ar e determined , th e reportshal l stat e tha

tn o exces s vinyl chlorid e emission s wer e determined . 11 . B y revising paragrap

h (a ) introductor

y tex to f 9 61.7 1 a s follows : |61.7 1 Recordkeeping. (a ) The owne r o

r operato r o

f any sourc e t o whic h thi s subpar tapplie s shal l retain th e followin g information a t th e sourc e ah d make itavailabl e for inspectio n t o th e Administrato r fo r a minimu m of 3 years : • '' . •'.•. . .. ' i ; 14 . B y revisin g paragrap h (a)(4 ) and adding paragrap

h (b)(1 ) t o S 81.1 8 a s follows : 161.1 8 Incorporatio n b y Reference . -

» • \

. *

_ . • . (a) * * * (4) AST M D2287-6 8 (reapproved 1978 ) Aromatic s i n Ligh

tNaphtha s an dP.2 7

• .»••• , *n>*^'--yt'ift,

Federa l Registe r /

Vol . 51 , No . 18 9 /

Tuesday , Septembe r 30 . 198 6 / Rule s an d Regulation s 3491 5 Aviatio n Gasolin e b y Gas Chromatography, IB

Rapprove d Jun

e 8 , 1984 , fo r § 61.245(d)(1 ) and IB

Rapproved Septembe r 30,198 6 for § 61.87(h)(1) . (b ) Th e followin g materia l i s availabl e fro m the U.S . EP

A Environmenta

l

- Monitoring- and Suppor

tLaboratory, - —- - Cincinnati . Ohio 45288 . (1 ) Method 601 . Tes tMethod fo r Purgeable Halocarbons , Jul y 1982 . IB R approved Septembe r 30,198 6 for 9 81.87(g)(2) . 15 . B y revisin g th e definitio n "volatil e hazardous ai r pollutants " in 9 61.24 1 o f Subpar tV t o read a s follows : 961.24 1 Definitions. "Volatil e hazardou s ai r pollutant " or "VHAP " mean s a substanc e regulated under thi s par

tfo r whic h a standar

d fo r -equipmen tleak s o f

th e substanc e ha s - bee n proposed and promulgated . Benzen e i s a VHAP

. Viny l chlorid e i s a VHAP . 16 . B y revisin g th e definitio n o f "connector " in 9 61.24 1 o

f Subpar tV a s follows : 9 81.24 1 Definitions . "Connector " mean s flanged , screwed , welded , o r other joine d fittings use d t o connec ttw o pip e line s o

r a pip e lin e and a piec e of equipmen tFo

r the purpos e o

f reporting and recordkeeping , connecto r mean s flanged fittings tha tar e not covere d by insulatio n o

r othe r material s tha tpreven tlocatio n of

the fittings. [F RDoc . 88-2203 2 File d &-2&-8S ; 8:45 am ]