P. 1



# OAR Box 1107 Prepped by Ollie Stewart



## Document

Number: 

# 32)IX-A- 1
Docket Number: 

# A-81-2 1

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## Tuesday Jul y 10 , 199 0



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# 2 7 199

0 EP A AI R DOCKE T



# Par t I I 

# Environmenta l Protectio n Agenc

y 4 0 CF R Par

t 6 1 Nationa l Emissio n Standard s fo r Hazardou s Ai r Pollutants ; Revision s t o Viny l Chloride ; Equipmen t Leak s of Volatil e Hazardou s Ai r Pollutants ; Fina l Rul eP. 3
H V ^ -ii®S S • IFsfasJ t E&sg8ato g /

. ¥o t SS , .Wo ; 13 2 /

Tuesday , fill y IQVlggQ

- / Rule s an d Regulation s I^^MCaiKnTAI L IMslOTieTOK ) reasonabl e fe e ma y b ® charge dfo ?

Maltoua! ) Issatocten) Sfianxatestol o tf®p Masa^tetts o Aft

? MWtesafls s KovOalten

o te :§STXaK25£

® WoJad o IHl£sa?igl®(yi o AO c ^©iyteinito

fliantasv: Environmenta l Protectio n Agenc y (EPA)

. flOTJ@KE Fina l rule

. syracOQlsn? : O n Septembe r 21.198 9 (5 4 F

R 38938)

. EP

A propose d mino r

revision s t o nationa l emissio n standard s for viny l chlorid e (VC ) an d equipmen t leak s of volatil e hazardou s ai r

pollutants

. Th e revision s t o di e nationa l emissio n standard s for

hazardou s ai r

pollutant s (NESHAP ) wer e propose d a s aresul t o f petition s fo r

reconsideratio n an d revie w file d b y th e Societ y o

f th e Plastic s Industry , Inc

. (SPI) , Do w Chemica l Company , Georgi aGul f

Corporation , an d Vist aChemica l Company

. Thi s actio n promulgate s final revision s t o th e NESHAP

. Th e intende d effec t of thi s actio n i s t o gran t

th e petitioners ' reques t for clarificatio n o

f ambiguitie s i n severa l definition s an d i n th e applicabilit y o f certai n regulator y requirement s i n th e standards

. Thi s notic e i s no t

intende d t o addres s th e July 28.1987 , decisio n b y th e D.C

. Circui t Court o n th e V C standards , Natural Resources Defense Council, inc. v . EPA. 82 4 F.2 d 114 8 (1987)

. An y respons e t o tha t

decisio n wil l b e mad e i n afutur e notic e i n th e Federa l Register

. DATES : Effective Date: Jul y 10,1990

. Judicial Review. Unde r

sectio n 307(b)(1 ) o f

th e Clea n Ai r

Act

. judicia l revie w o f

NESHA P i s availabl e onl y b y filin g apetitio n fo r

revie w i n th e U.S

. Cour t o f Appeal s fo r

th e Distric t

o f

. Columbi aCircui t

o n o r befor e Septembe r

10,1990

. Unde r

sectio n 307(b)(2 ) o f

th e Clea n Ai r

Act , th e requirement s tha t

ar e th e subjec t

o f today' s notic e ma y no t b e challenge d late r i n civi l o r

crimina l proceeding s brough t b y EP A t o enforc e thes e requirements

. AOOKESSS8 : Docket. A docket , numbe r A-81-21

. containin g informatio n considere d b y EP A i n th e developmen t o f th e promulgate d standard s an d th e petition s fo r

reconsideration , t o whic h thi s notic e i s responding , i s availabl e fo r publi c inspectio n betwee n 8:3 0 a.m . an d 3:3 0 p.m. . Monda y throug h Friday , a t EPA' s Ai r

Docke t Sectio n (LE-131)

. Roo mM15C0 , Firs t

Floor

. 40 1 M Stree t SW.

. Washington

. D C 20460

. A P®C 3 PW3TOQJ

3 BMP©CQE3A7!]@K

) @®OTA©Jt

' Fo r furthe r informatio n an d interpretation s o f

applicability , complianc e requirements , an d reportin g aspect s o f

th e revise dstandards , contac t th e appropriat e Regional , State , o r loca l offic e contac t

a s liste di n 4 0 CF

R80.4

. Fo r furthe r informatio n o n th e backgroun d for

th e final revise d standards , contac t

Ms

. Shirle y Tabler , Standard s Developmen t

Branch , Emissio n Standard s Divisio n (MD-13) , U.S

. Environmenta l Protectio n Agency , Researc h Triangl e Park , North Carolin a 27711

. telephone

. (919 ) 541-5256

. SUimgMEWTAfil

V INFOBR3AYIOC

E
In December

. 1975 , EP

A designate d VC a s ahazardou s ai r

pollutan t unde r sectio n 11 2 o

f th e Clea n Ai r

Ac t (4 2 U.S.C

. 7412) an d promulgate dfina l rule s fo r V C o n Octobe r

21,197 8 (4

0 CF R 61.60-61.71) ; Th e standard s limi t emission s of

V C fromplant s producin g ethylen e dichlorid e (EDC ) vi a oxychlorination

. VC , an dpolyviny l chlorid e (PVC ) o r

othe r polymer s containin g VC

. Thes e plant s ar e subjec t to acombinatio n of

emissio n limits , equipment , an d work

practic e requirement s a t

numerou s point s i n th e manufacturin g processes . O n Septembe r

30,198 6 (5 1 F

R34904) , EP A promulgate d severa l administrativ e an d clarifyin g revision s t o th e nationa l emissio n standar d fo

r VC

. Subsequently , o n Novembe r

26.1986

. SP

I file d wit h EP A apetitio n fo

r sta y an d administrativ e reconsideratio n o f seve n provision s i n th e final revision s t o th e VC standard

. Th e SPI , Do w Chemica l Company , Ceorgi aGul f

Corporation , an d Vist aChemica l Compan y concurrentl y file dapetitio n fo r revie w o f severa l provision s o f

th e revise d standar dwit h th e U.S

. Court o f Appeal s fo r th e D.C

. Circuit

. Th e petitioner s asserte d tha t

withou t adequat e notice , EPA' s 198 8 revision s change dke y provision s of

th e V C standar d i n a manne r that : (1 ) violate d cas e law ; (2) impose dne w penalties ; (3 ) create d multipl e penaltie s fo

r th e sam e event ; an d (4) expande dth e type s of equipment subjec t t o th e standard

. I n summary , th e petitioner s requeste d revie w of th e definition s o

f "exhaus t gas, " "relie f

valv e discharge. " "leak, " "3-hou r period, " an d"ethylen e dichlorid e purification" ; th e scop e o f th e relie f valv e discharg e provisions ; an d th e leak detectio n an d eliminatio n provision s (are amonitoring)

. Th e SP I als o requeste dtha t

EP A issu e asta y of th e 198 6 revision s t o th e V C standar d pendin g revie w o f thos e revise d provisions

. Th e revision s propose d o n Septembe r 21,1989 , wer e i

mregar d t o clarification s t o th e definitions

. No changes , however , wer e mad e wit h regar d t o fixe d are a monitorin g requirement s o r th e relie f valv e discharg e standard

. In th e 198 9 proposa l preamble , EP

A als o denie d th e petitioner' s reques t

fo r asta y o f th e 198 6 revise d provisions

. A detaile d discussio n of

th e issue s presente d in th e petition s fo

r revie w an d EPA' s respons e t o th e issue s i s containe di n th e preambl e for

th e propose d revision s (5 4 F R38938-38942)

. I L Publi c Participatio n Th e propose drevision s t o th e NESHA P wer e publishe d i n th e Federa l Registe r o n Septembe r

21,198 9 (5 4 F

R 38938)

. A publi c hearin g wa s schedule d o n Octobe r

18,1989

. However , ther e wer e n o request s for

ahearing

. Th e publi c commen t

perio d laste d fro

m Septembe r

21,198 9 t o Novembe r

20 , 1989

. Tw o commen t

letter s wer e receive d fro

mth e industry , bot h o

f whic h ha dfile d petition s fo r revie w of th e 198 8 revisions

. Bot

h commenter s expresse d thei r

suppor t o f th e propose d revise dprovision s of

Septembe r

21 , 1989 , an d state dtha t

th e revise d provision s respon d t o th e concern s file d i n thei r petition s fo

r review

. Th e commenter s di d no t

reques t an y additiona l change s to th e NESHAP

. III

. Th e Promulgate dRevision s Th e clarifyin g revision s bein g promulgate dtoda y ar e identica l t o thos e propose do n Septembe r

21,1989

. Th e followin g i s asummar y o f th e promulgate drevisions

. A

. Th e definitio n o

f "exhaus t gas " ha s bee n modifie d b y addin g tw o sentence s whic h clarif

y tha t aleak i s no t a n exhaus t gas , an d tha t

equipment containin g exhaus t

ga s mus t compl y with th e lea k

detectio n an d preventio n provision s ( § 61.85(b)(8)) , whethe r o r no t tha t equipment

contain s 1 0 percen t

b y volum e VC

. Thi s additio n assure s tha t leak s fro mexhaus t

ga s stream s ar e subjec t t o th e leak

detectio n an d eliminatio n requirements , bu t tha t suc h leak s wil l no t

als o b e classifie da s "exhaus t gas. " B

. Mino r revision s wer e mad e t o th e definitio n o f

"relie f valv e discharge " an dt o th e relie f

valv e discharg e (RVD ) provision s ( § 61.65(a) ) t o clarif y tha t a n RV D route d t o aproperl y designe d an d operate dcontro l devic e woul d b e exempte d fro mth e provision s o f th e RV D standard

. Thi s chang e prevent s misinterpretatio n o f

th e regulator yP. 4

EFjjw*^ : 

### Federa

l Registe r /Vol

. 55 ; No , 13 2 /

Tuesday, * Jul

y 10 V 199 0 / Rules an d

Regulation s 2834 ? requirement

s an d impositio n of

a doubl e penalty . I n addition , ne w provision s ( 8 61.65(d) ) hav e bee n adde d for a n RV D tha ti s ducte d t o a contro l devic e tha ti s continuall y operatin g whil e emission s fro m th e releas e ar e presen tatth e device . A n RV

D tha ti s ducte d t

o a contro l device , othe r tha

n a flare , woul d b e subjec tt o th e 1 0 ppm limi tan d th e continuou s emissio n monitoring syste m requirementcontaine d i n J 61.8 8 and t o th e reporting requirement s of § 61.70 . I

n th e cas e of

flares , emissio n monitoring i s no tpossible . Therefore , fo r RVD' s route d t o a flare , th e desig n requirement

s for flare s (4 0 CF

R60.18 ) woul d apply . Th e EP

A recognize s tha

t measurementof

relief valv e discharg e volumetri c flo w rate s and ga s strea m compositio n i s no tpossibl e usin g th e method s se tfort

h in 8 60.1 8 (f)(3) and (f)(4) . Estimate s o

f thes e parameters will , therefore , nee d t o b e base d o n empirica l o r othe r bases , subjec tt

o EP A approval . Flar

e operation s woul d b e monitore d i n accordanc e wit h th e requirement

s o f § 8 60.18(d) and 60.18(f)(2) . Fo

r th e purpos e of

§ 60.18(d) , th e volum e and componen t concentratio n o f

eac h RV D woul d b e estimate d an d calculation s woul d b e mad e t o verif

y ongoin g complianc e wit h th e desig n and operatin g requirement s o f $ 60.1 8 (c)(3 ) throug

h (c)(6) . I f mor e tha n on e relie f

valv e i s discharge d simultaneousl y t o a singl e flare , thes e calculation s woul d accoun tfor th e cumulativ e effecto n al l such RVD's . I f th e results of

th e monitoring containe d in $ 60.18(f)(2

) o r any othe r information sho w tha tth e pilo tflame i s notpresent 10 0 percento

f th e time durin

g which a n RV D i s routed t

o a flare , th e RV

D i s subjec tt o th e provision s of

§ 61.65(a) . A repor tdescribin g th e flar

e desig n must b e provide d t

o th e Administrato r not late r tha n 9 0 day s after th e adoptio n of thi s provisio n o r withi n 3 0 day s o f th e installatio n o

f a flar e syste m fo

r control of RVD's . whicheve r i s later . C . Th e standard s fo

r pump s i n V C servic e ( § 61.242-2(d) ) wer e revise d t o clarif y th e requirement

s for pum p sea l drips . Sectio n 61.242-2(d)(4 ) addresse s drip s fro m pum p seal s tha

tcontai n VC , an d § 61.242-2(d](6 ) addresse s drip s fro m pum p seal s tha

td o no tcontai n V C Th e fina l revise d provision s o

f 3 81.242-2(d ) are designe d t o accomplis h tw o purposes . On e i s t

o ensure tha

tV C leak s fro m pum p seal s ar e detecte d an d eliminated . Thi s i s accomplishe d b y paragraphs (d)(4 ) (i) , (ii) , and (iii) . Th e othe r purpos e i s t

o identif y and prevent pum p sea l failure s b y causin g abnorma l drippin g (eve n whe n V

C i s not containe d i

n th e drippin

g liquid ) t o b e detecte d an d repairs t o b e made ; Thi»i *

accomplishe d b y paragraph s (d)(6 ) (i) , (iii) , an d (iv) . Thes e paragraph s requir e th e facilit y owne r o r operato r t o establis h criteri a associate d wit h norma l operation . Th e inten tof

th e fina l provision s i s identical t

o th e existin g provision . Th e differenc e i s tha

tth e promulgated provision s of

8 61.242-2(d)(6)(i ] allo w a n owne r o r operato r t

o tak e into accoun t th e smal l number of

liqui d drip s tha

t ma y occu r whe n ne w seal s are i n plac e o r are otherwis e associate d wit h norma l operation . D . Th e definitio n of

"3-hou r period " ha s bee n revise d t o ensur e tha ta singl e even tof 1-hou r o r les s a t1 0 pp

m o r greate r coul d resul ti n n o mor e tha n a singl e violatio n of

th e exhaus tga s standard . A phras e ha s bee n adde d t o th e definitio n of

"3-hou r period " i n § 61.51(z ) t

o accomplis h this . Th e EP A di d notinten d t

o penaliz e a plantthre e time s wheneve r a 1 0 pp

m even toccur s withi n 1 hour. Rather, EP A wante d t o ensur e tha

ta combinatio n o f

tw o o r mor e 1 0 pp m event s whic h woul d resul t in a 3-hou r exceedanc e d o notg o unpenalize d jus tbecaus e the y occurred ove r tw o separat e 3-hou

r "blocks. " Th e promulgated revise d definitio n o f "3 - hou r period " satisfie s EPA' s inten t withou tunintentionall y subjectin g a plantowne r o

r operato r t

o multipl e violations . E. Th e definitio n o f

"ED C purification " ha s bee n revise d t

o clarif y tha t emission s fro

m crude , intermediate , and fina l storag e tank s followin g EDC formation ar

e notsubjec tt

o th e exhaus t ga s standard . (The 198

6 revision s exempte d onl y fina

l storag e tanks. ) I

n addition , $ 61.65(b)(6) , Openin g of equipment, ha s als o bee n revise d t o clarif y tha tth e requirement

s in thi s sectio n d o notappl y t

o crude , intermediate , o r fina

l ED C storag e tanks . A s state d in the proposa

l preamble , th e regulatio n o

f thes e storag e tanks i s unnecessar y becaus e emission s ar e extremel y low . F . I n additio n t

o th e change s mad e i n respons e t

o th e petition s fo

r reconsideration , a mino r clarificatio n ha s bee n mad e in 8 61.68 , Emissio n monitoring . Sinc e iti s obviou s tha t paragrap h (a) o f 8 61.6 8 call s fo

r th e monitoring o

f th e emission s fro

m prescribe d source s fo

r viny l chlorid e an d notambientai r samplin g a s required unde

r 3 61.65(b)(8 ) fo

r lea k detection/elimination , 8 61.68(b ) ha s bee n clarifie d t

o requir e tha t representativ e (notair

) sample s fro

m on e o r mor e applicabl e emissio n points b e obtaine d and analyzed . Thi s promulgated revisio n more accuratel y reflects the origina

l intent . IV . Administrativ e Requirements A. Docket Th e docke ti s a n organize d an d complete fil e of

al l th e informatio n submitte d t

o o r otherwis e considere d b y EP A i n th e developmen tof

thi s rulemaking . Th e docketin g syste m i s intende d t

o allo w members o

f the publi c an d industrie s involve d t o readil y identif y an d locat e documents s o tha t the y ca n effectivel y participate i n th e rulemaking process . Alon g with th e statemen to

f basi s and purpos e o

f th e propose d an d promulgated revisions , and EP A response s t o significan t comments , th e content s o f th e docket , excep tfor interagency revie w materials , wil l serv e a s th e recor

d i n cas e o

f judicia l revie w (se c 307(d)(7)(A)) . B. Paperwork Reduction Act Ther e are n o additional informatio n collectio n requirement

s associate d with thi s rulemaking . C. Executive Order12291 Unde r Executiv e Order 12291 . EP A mustjudg e whethe r a regulator

y actio n i s "major " and , therefore , subjectt o th e requiremen

to f a regulator

y impac t analysis . Thi s fina

l rulemaking i s no t majo r becaus e i

tmake s minor clarifyin g revision s t

o a n existin g regulatio n and , therefore , results i n non e o f th e significantadvers e economi c effect s describe d i

n Ih e Order . Thi s rulemakin

g wa s submitte d t

o the Office o f Managemen

tand Budge

t (OMB ) fo r revie w a s require

d by Executiv e Orde

r 12291 . Any writte n comment s fro m OM B t o EP A and an y EP A respons e t

o thos e comment

s ar e include d i n DocketNo . A-81-21 . Th e docke ti s availabl e fo

r publi c inspectio n a tEPA' s Air Docke tSectio n tha ti s liste d unde

r the ADDRESSE

S sectio n of thi s notice . D. Regulatory Flexibility Act The Regulator

y Flexibilit

y Ac t( 5 U.S.C . 60 1 et

seq.) require s th e identificatio n of

potentiall y advers e impact s o f Federa l regulation s upon smal l busines s entities . Th e Ac t specificall y require s th e completio n o f a Regulator y Flexibilit

y Analysis in thos e instance s where smal l busines s impacts ar e possible . Becaus e thes e minor revision s impos e n o advers e economi c impacts , a Regulator

y Flexibility Analysi s ha s notbee n conducted . Pursuan tt o th e provision s of

5 U.S.C . 605(b) , I hereb y certif

y tha tth e fina l rule wil l nothav e a significan teconomi cP. 5



### 2ZMM Eedfal , Registe e h Yof c 58x,No> . tSfc^TueidbiR : Jnl y B)> . 109ft,/ ftufes aoi l ft&guknbbna unp^B»oa

t e^BubetaiitiafaBinKa*.offwrnnll i i entities . ListofSub^a*4B4»CWfcPa«r6* , Ai r pollutio n contro l Asbestos* ; Benzene , Beryllium . Coke ove n emission * Hajtardte e ssbstanees v Incorporatlons-byreiereiieg . Inorgani* " arseni a Intergovernmenta l rotation * Mercury , RadienuoHdee

v Reportingaiid ' recordkeepin g requirements * Vlny M chloride ; Volatile^iazardOwa w pollutants * Dated : July

. 3:1990 : Willia m I C RailTjr, . Administrator. Fo r thebesian s se tforthU n ths > preamble 4 0 CF

Rperf8l:i » amende d a s follows ^ PAR T 61~-fAMENOED} . 1 . Theauthority citatio n fo r par t6 1 continue s t

o read-as follows ! AuUtenty : 9BCS

J 101 . .112:.114.110*301.. CUa n Air . Ac ta a amende d (42.U.S. C 7401. . 7412 . 7414 , 7416 . 7601). 2 . Sectio n 61.6 1 is . amende d b y revisin g paragraph s (o) . (w)," (x) . (y).an d (z ) tcrreadrasfollows

j 

### §eij8i - Definition. (0 ) Ethylene dichloride purification include s any.par

to f th e proces s of

; ethylen e dichlorid e purificatio n followin g ethylen e dichlorid e formation , bu texcludescrude , intermediate , and fina l ethylen e dichlorid e storag e tanks . (vv ) Leak mean s an

y o f severa l event s tha tindicat e interruption o

f confinement of viny l chlorid e withi n process equipment . Leak

s includ e event s regulate d unde

r subpar tV o f thispart such as r (1 ) A n instrumen

treadin g of

10,000 ; pp m o r greate r measure d accordin g t w Metho d 2 1 (se e appendix A o f 4 0 CF R par t60) ; (2 ) A senso r detectio n o

f failur e o f a sea l system , failure o f

a barrie r fluid system * o r both; : (3 ) Detectabl e emission s a a indicate d b y a n instrumentreadin g of

greate r tha

n 500 po m abov e background fo

r equipmentdesignate d for.n o detectable emission s measure d accordin g t o .Test . Metho d 2 1 (se e appendi x A ^o f 4 0 CFRpar t.60) ; and ; (4) I h th e cas e of

pum p seal s regulate d unde r 5-61.242-2_indication s o f liqui d dripping constituting.-a-lea k under 5 61.242-2. . Leaks-als o includeevent s regulate d under-3 <61.65(.b){8)(i)jfor.detectionio f ambientconce n trations-i n exces s of : bawl^uas^MBerf^iana i Atrefcef c valv e diactejrsoiadtoh e leak . (x) L fi)cAa«»^e«<Beafl» 1 anyioffgftft3(the ; constitueats*of

t wlHQl><mey

j consis tofiaoy

j fluid»*.either aa »liqui d ajidVar.gas) ; discharge d directl y o r ultimatelvftathe r a tmosphire- . tha twaaiinilially . containe d i n orjwasJn,dirBcLcontact.with , th e equipmentfor

. whichbgasjimits are . prescribe d in-}!63.62(a ) ^nd^h) ^ 6i;63(a) ; 81.6!J:(a)tl

V (BjacX.and^dU . 81.651b)(l)ni K (b)(2) , (b)(3) . (b)(5K . (b)(6)(H) , (b)f7) l,and > (bK9)(i-i)!.an4 - 8i:6S(d) . A.lea k a a define d in paragrap h (w ) of'thi s sectio n i s nota n exhaus tgas . Equipmen

twhic h contain s exhaus tga s i s subject-to - S^l^r/NtH , whether-or.-not . that.equipment'containslOpereent'b y vo l ume-vinyl chloride * (y ) Relief valve=discharge means-art y nonlea k discharge d hroug h a reiief-Valye . (z ) S^ourperiod

means^an

y three consecutive - l-haur<periods-(eacrrcommencin g o n the-hour) ; provide d tha t thenumb w o

f 3-hou r periodswinringj < whic h th e viny l chlarideaconcentration' . exceeds-.lOppraxlde a no texcee d tha i number ofl-how-period s during , whieb i th e viny l chlorid e concentr e tiomexceeds i 1 0 ppm. 3 : Sectroir61.63'isamended-by revisingparagraphs (a) and(b)(6) ' introductory/text , and addin g paragrap h (d ) t o read asfollows r §81.65 . Emissio

n standardfo*ethyl«fl* - dichloride, viny

l chlorid e an d polyvinyl chlorid e plantsw . (a ) Relief valve discharge. Excep tfo r a n emergency relief

discharge , and . excep ta s provide d in § 61.65(d) . ther e i s t o b e n o discharg e t

o th e atmosphere fro m an y relief

valv e o n any . equipmen

t i n viny l chlorid e service . A n emergency relief discharg e mean s a discharg e whic h coul d nothav e bee n avoide d b y taking measure s t

o preyen tth e discharge . Withi n 1 0 day s o f any.relie f valv e discharge , excep tfo r thos e subject t o § 61.65(d) ; the owne r o

r operato r o

f th e sourc e fro

m whic h th e relie f

valv e discharg e occur s shal l submitt o the Administrato r a repor

tin writing containin g informatio n o n th e source , natur e and caus e o

f the discharge , the-, date an d tim e o

f the discharge ; the approximate tota

l viny l chlorid e loss ' durin g thediscbarge . th e metho d use d fo r determining;th e viny l chlorid e los s (th e calculatio n o

f th e viny l chloride loss) , th e actio n tha

twa s taken t

o preventthedischarge . an d measures ) adopte d t o preven tfutur e discharges ; (b) * •• - (6) Opening.of

equipment. . Vinyl , chlorid e emission s tframropening.-af equipment.(excludin g crude, . intermediate ; andiina l ED C stosag e tanksoJb»ttirinh>tUiig4pxt!polymematiar o reactor s use d in th e manufactur e o f imlk . resin s an d loadinfoinmtcadingJines r that'amno topeeedntttth e atmosphere s afWeacteloadfagjoruirioading ) operau^l-aflejttebeTminimizedfdkxtvsz : • • - * . .. *

* (d ) A^RVD^tha

ti»>ducte d toa-corrtrol " device«tha

ti s corrtmually^operating ; whil e emissions-fro m thereleaseere presen tat.th e devieenasubjec tt o th e followin g requirements * (1 ) Adischarge-fromaicontrordeyice otherthan- a flar

e shall notexcee d 1C

F pp m (averag e overa-3-hou p period ) as > determine d by thex»ntmuoo s emissio n monito r ey e ter

n required unde r $"61:68 ; Suc h a > discharg e is<8nbjec

tto.tbe requirement

s o f 'J 61.70 . (2)Foradischargeroute d to e flare , th e flare : shal l comply-wrt h therequirements o f

8 - 60.18 . (i ) Flare-operation s shal l be-monitoredi in accordance-with th e requirement s o f 8ff-6ai8(d)and«6.18(f)(2) . Fo r the purposes'o f

3<60.18(d) , the volum e and : componen tconcentratio n o f eac h relie f valv e discharg e shal l b e estimate d and calculation-shal l b e mad e t o verify , ongoin g complianc e wit

h the^desig

n and operatin g requirement

s o f 88 60.18(c)(3 ) throug h (b)(6) . I f mor e tha n on e relief valv e i s discharge d simultaneousl y t o a singl e flare , thes e calculation s shal l accoun tfo

r th e cumulativ e effecto

f al l such relief

Valv e discharges , Thes e calculation s shal l b e made and reported quarterl y fo r al l discharge s withi n th e quarter. Failure-t

o compl y wit

h an y o f th e requirement

s o f thi s paragrap

h wil l b e a violatio n o

f § 61.63(d)(2) . Monitoring fo

r the presenc e o

f a flar e pilo tflame shal l b e conducte d i n accordanc e wit

h § 60.18(f)(2) . I

f th e results o f thi s monitoring o

r an y othe r information show s tha

tth e pilo tflam

e i s notpresent100 percento f th e tim e durin g whic h a-relie

f valv e discharg e i s routed t o the flare , the relief

valv e discharg e i s subjectt

o th e provision s o

f § 61.65(a) . (ii ) A repor

tdescribin g the flar

e desig n shal l b e provide d t o the Administrato r notlate r tha n 90 day s after , th e adoptio n o

f thi s provisio n o

r withi n 3 0 day s o

f th e installatio n o

f a flar e syste m fo r contro l o

f relief valv e discharge-whicheve r i s later.-Th e flar e desig n repor

tshal l includ e calculation s base d upo n expecte d relie f valv e discharge.componen tconcentrations , an d ne theatin g value s (fo r PV C thi s calculatio n shal l b e base d o n value s expected.if

a releas e occurred a

tth e instant:the ; polymerizatio n starts) : and estimate d maximum-exitvelocities : base d upon the-desig n throa tcapacity o

f the gasdn^th

e relie f valve. .P. 6 

### Federal Registe r /

Vol . 55 . No . 13 2 /

Tuesday , Jul

y 10 , 199 0 /

Rule s an d Regulation s 2834 9 4 . Sectio n 61.8 8 i s amende d b y revising th e firstsentenc e i n paragraph (b ) t o read a s follows : 861.6 S Emissio n monitoring . • * » • • (b ) Th e viny l chlorid e monitoring system(s ) use d t

o mee tth e requirement in paragraph (a ) of

thi s sectio n i s t

o b e a devic e whic h obtain s representative sample s fro

m on e o r mor e applicabl e emissio n points o n a continuou s sequentia l basi s an d analyze s th e sample s wit

h ga s chromatography or , i f th e owne r o r operato r assume s tha tal l hydrocarbon s measure d ar e viny l chloride , wit

h infrared spectrophotometry , flame io n detection , o r a n alternativ e method . * * *

• • * * * 5 . Sectio n 61.242- 2 o

f subpar tV i s amende d b y revisin g paragraph s (d ) introductor

y tex t(d)(5) , an d (d)(6) , an d b y adding paragraph s (d)(4 ) (i) , (ii ) an d (iii ) t o read a s follows : §61.242- 2 Standards : Pumps . (d) Eac h pum p equippe d with a dua

l mechanical sea l syste m tha tinclude s a barrier flui d syste m i s exemp tfro m th e requirement

s of paragraph s (a) an d (b ) of thi s section , provide d th e followin g requirement

s are met : **** * (4 ) ' • * (i ) I f there are indication s of

liqui d dripping fro

m th e pum

p sea l atth e tim e of th e weekl y inspection , th e pum p shal l b e monitore d a s specifie d in 3 61.24 5 t o determin e th e presenc e o f VO C an d VHAP i n th e barrier fluid. (ii ) I f th e monito r readin g (takin g into accoun tan y background readings). indicate s th e presenc e of VHAP , a leak i s detected . Fo

r th e purpos e of

thi s paragraph , th e monito r ma y b e calibrate d with VHAP, o r may emplo y a ga s chromatograph

y column t

o limi tth e respons e of

th e monito r t

o VHAP, a

tth e optio n of th e owne r o r operator . (iii ) I f a n instrumentreadin g of

10,000 pp m o r greate r (total VOC ) i s measured , a leak i s detecte d (5 ) Eac h senso r a s describe d i n paragraph (d)(3 ) of

thi s sectio n i s checke d dail y o r i s equippe d wit h a n audibl e alarm . (6)(i ) Th e owne r o r operato r determines , base d o n desig n consideration s and operatin g experience , criteri a applicabl e t o th e presenc e an d frequenc

y o f drip s an d t o th e senso r tha

tindicate s failur

e of th e sea l system , th e barrier flui d system , o r both . (ii ) I f indication s o f

liquid s dripping fro m th e pum

p sea l excee d th e criteri a establishe d in paragraph (d)(6)(i ) of thi s section , o r if

, base d o n th e criteri a establishe d i n paragrap

h (d)(8)(i ) o

f thi s section , the senso r indicate s failur e of th e sea l system , th e barrier fluid system , o r both , a leak i s detecte d (iii ) When a leak i s detecte d itshal l b e repaired a s soo n a s practicable , bu t n o late r tha

n 1 5 calenda r day s afte r i ti s detecte d excep ta s provide d i n 3 61.242 - 10 . (iv ) A firstattemp tatrepair shal l b e mad e n o late r tha

n five calenda r day s after eac h leak i s detected . [F RDoc . 90-1601 5 Filed 7-9-90 : 8:4 5 am ] WLUN Q COO C UfO-CO- M