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# OAR Box 1252 Prepped by Candice Davis



## Document

Number: 

# 37 ) FE D RE G VOL

. 58 , NO

. 3 7 2/26/9 3 Docket Number: 

# A-90-2 2

Printed 5/21/2008 11:46:01 AM Sheet 3 7 of 184

# r r P. 2

4369 8 Federa l Registe r / Vol
. 61 , No
. 16 6 /

Monday,.,Augus t

26 , 199 6 /

Pjoposed^RUles
.
o n an y governmenta l entit y or th e privat e sector
. Lis t o f Subject s i n 3 0 CF

RPar t 93 5 Intergovernmenta l relations , Surfac e mining , Undergroun dmining
. Dated : August

14,1996
. Ti mL
. Dieringer , Acting Regional

Director, Appalachian Regional Coordinating Center. ' [F RDoc
. 96-2167 7 Filed8-23-96 ; 8:4 5 am ] BILLIN G COD E 4310-05- M
ENVIRONMENTA L PROTECTIO N AGENC Y

. 40CFRPart6 3 [AD-FRL-5558-3 ] RIN2060-^AC1 9 Today' s actio n propose s new . definition s tha t

appl y t o wastewate r

ari d wastewate r

treatmen t

an drevise d
. contro l an dcomplianc e provision s fo r wastewater
. A ne w complianc e dat e o f Apri l 22 , 199.9 , i s bein g propose dfo r proces s wastewater , heat

exchang e systems , in-proces s equipmen t subjec t t o th e provision s o

f § 63.149 , an d maintenanc e wastewater
. Th e propose d••• .

. change s t o thes e provision s ar e sufficientl y fa

r reachin g an dcomple x t o rende r thos e provision s effectivel y a' ;ii }

~ ne w rule
. Th e EP

A i s als o proposin g a : ? separat e complianc e dat e fo r wastewate r stream s affecte db y th e omissio n o f M ' ' nitrobenzen e fro

mth e lis t o f compound s subjec t

t o th e wastewate r provisions
. Th e propose drevision s to ; th e othe r provision s t o th e rul e ar e correction s an dclarification s t o ensur e th e rul e i s implemente da s intended
. Today' s amendment s woul dals o provid e some additiona l complianc e -^.option s tha t

woul dreduc e th e burde n •*) associatedwithth e recordkeepin g an d Nationa l Emissio n Standard s fo r Hazardou s Ai rPollutant s fo rSourc e Categories : Organi cHazardou s Ai r PollutantsFrorr,,theSyntheticOrganic

- ^portin g reqm^ement s o f th e ml e Chemica l Manufacturin g Industr y and ^ V fae propose damendment s t o th e rul e Othe r Processe s Subjec t

t o th e ^ will no t chang e th e basi c contro l Negotiate dRegulatio n fo r Equipmen t

requirement s o

f th e rul e or

th e leve l o

f Leaks ; Propose dRul e Clarifications\J\ * healt hprotectio n i t provides
. Th e rul e ' ^"

- require s ne w an dexistin g majo r source s \t o contro l emission s o f hazardou s ai r pollutant s t o th e leve l reflectin g .AGENCY : Environmenta l Protectio n Agenc y (EPA)
. ACTION : Propose drule : Amendments
. G ^ P°"" i a " l s l u u » ltJVB 1 reilB " ul 8 . , .

— . -. i r4 v applicatio n o i th e maximu machievabl e SUMMARY : O n Apri l 22,199 4 an djiin9J6%» contro 1 technology
. 1994 , th e EP

A issue dth e Nationa l i DATES: Comments. Comment s mus t b Emission.Standard s fo

r Hazardou s Afrs i receive do n or hpfnr a.Sentf-mhg

j ^f a Pollutant s fo

r Sourc e Categories : NPMgg e unles s ahearin g i s requeste dB y Organi c Hazardou s Ai r

Pollutant s from^Septembe r 5,1996
. I

f ahearin g i s th e Syntheti c Organi c Chemica l Manufacturin g Industr y an dOthe r Processe s Subjec t

to , th e Negotiate d Regulatio n fo

r Equipmen t

Leaks
. Thi s rul e i s commonl y know n a s th e Hazardou s Organi c NESHAP or th e HON
. I n Jun e 1994 , petition s fo r revie w o f th e Apri l 199 4 rul e wer e filedi n th e U.S
. Court

o f Appeal s fo

r th e Distric t

o f Columbi aCircuit
. Th e petitioner s raise d over 7 5 technica l issue s an dconcern s wit hdraftin g clarit y o

f th e rule
. Today' s actio n propose s correctin g amendment s t o th e rul e t o addres s th e petitioners ' issues
. requested , writte n comment s mus t b e • receive db y October

10,1996
. • Public Hearing. Anyon e requestin g a. publi c hearin g mus t

contac t th e EP A n o late r tha n Septembe r

5,1996
. I f a hearin g i s held , i t

will take , plac e o n Septembe r

10,1996 , beginnin g at

10:00 a.m . ADDRESSES: Comments. Comment s shoul db e submitte d(i n duplicate , if
. possible ) to : Ai r

an dRadiatio n Docket an dInformatio n Center

(6102) , Attentio n Docket

Number
. A-90-1 9 (se e docke t sectio n below) , RoomM-1500 , "•• U.S
. Environmenta l Protectio n Agency, " 40 1 M Street , SW , Washington , D.G
. 20460
. Th e EP

A request s tha t

aseparat e cop y als o b e sen t

t o th e contac t

perso n liste dbelow
. Public Hearing. I

f apubli c hearin g i s held , it will b e hel dat

th e EPA' s Offic e o f Administratio n Auditorium , Researc h Triangl e Park , NorthCarolina
. Person s intereste di n attendin g th e hearin g o r wishin g t o presen t

ora l testimon y shoul dnotif

y Ms
. JoLyn n Collins , Wast e an dChemica l Processe s Group ; U.S
. Environment ^ Protectio n Agency , Research-TrianglePark , N.G
. 277ii ; telephon e (919 ) 541-5671
. - • ; D6efcet f Dot o A-90^23 : pontainin e th e supportin g • - . : . infdrmatid hfprih e origina l NESHAP " an dtMsactibn i ar e availabl e for publi c inspectio n and-copyin g between ' 8:0 0 • a.m;ari'd ; 5:3 0 p:m;;-Monday throug h Friday , at th e EPA' s Ai r

an dRadiatio n Docket'an dInformatio n Center , Waterside-Mall , RoomM-1500 , firs t floor , 40 1 M StreetSW , Washington , DC
. 20460 ; o r bycallin g (202 ) 260-754 8 o r 260^7549
. A ; reasonabl e fee ma y b e charge dfo

r copying
. Comment s o n th e propose dchange s toth e NESHAP may als o b e submitte delectronicall y b y sendin g electroni c mai l (e-mail ) to : a - : and-r^docket@epamail.epa.gov
. FO RFURTHE RINFORMATIO

N CONTACT

: Fo r general questions , contac t Dr
. Jane t S
. Meyer , Coating s an dConsume r Product s Group , at (919 ) 541 T 525 4 o r

Mary To m Kissell , Waste an dChemica l Processe s Group , at (919 ) 541-4516
. Fo r

technica l question s o n wastewate r

provisions , contac t Elain e Manning , Wast e an d Chemical Processe s Group, , telephon e number.(919 ) 541-5.499
. Th e mailin g addres s fo r the , contact s i s Emissio n Standards;Divisio n (MD-13) , U.S
. Environmenta l Protectio n Agency , Researc hTriangl e Park , NorthCarolin a 27711. ' SUPPLEMENTAR Y INFORMATION : I
. Regulate dEntitie s an dBackgroun d Informatio n A.'Regulated

Entities' Th e regulate dcategor

y an dentitie s affecte db y thi s actio n include ; Category.

. Industry , Example s o f regulated ; je.ntities'

. Syntheti corgani cchemica l manufacturin g industr y(SDCMI) ' units,.e.g. , producer s o f benzene , toluene , o ran yothe rchemica l liste d i n Tabl e 1 o f 4 0 CF R part.63 , subpar t F.' ' • Styrene^butadien e rubbe rproducers

. Polybutadieh e rubbe rproducers

. Producer s o f Captafol® ; Captah® ; Chlprothalbnil;;Dacthal ; an d TordonT M acid

. Producer s o f Hypalon® ; ; Oxybisphehoxarsine/1,3i^iisccyanat e "(6iPA®) ; Poiycarbohates ; Polysulfid e rubber ; Chlorinate d paraffins;,^ndiSyrnmetrica l tetrachloropyridine

. ' Pharmaceutica l producers !P. 3

• ''y- '.',' "F^eralr f Registe r//Vol
. 61 , ,No^l66
. /
. Monday , Augus t 26 , 199 6 /

Propose dRule s 4369 9

• Category

• - Example s o f regulate d entitie s Producers of Methylmethacrylate-butadiene-styren e resin s (MBS) ; Butadiene-furfura l cotrimer ; Methylmethacrylate-acrylonitrile-butadiene-styren e (MABS ) resins ; an d Ethyliden e norbornene

.

Eiftf Thi s tabl e i s no t intende dt o b e exhaustiv e but , rather , provide s aguid e fo r reader s regardin g entitie s likel y t o b e intereste di n th e revision s t o th e regulatio n affecte db y thi s action
. Entitie s potentiall y regulate db y th e , j HON ^aie'thds e .whichproduc e a s primar y intende dproduct s an y o f th e -

. , chemical s liste duyfabl e 1 o f 4 0 CF R':

- ' • '

• • par t 63, r siibpair t

F'ah dar e locate da t

• facilities'tha t

ar e majo r

source s a s . define di n sectidrt'11 2 o f th e Clean*Ai r

''-'• Ac t (CA)
. Processe s subjec t t o th e negotiate dregulatio n fo r equipmen t leak s (i.e. , 4 0 CFR'par t 63 , subpar t

I ) ar e als o potentiall y affecte db y thi s action
. Processe s subjec t

t o 4 0 CF Rpar t

6.3,

- subpart
. I ar e producer s o f an y o f th e product s liste diri'4 0 CF Rpart.63 , subpar t Ttha t ar e locate da t

facilitie s tha t ar e majo r

source s a s define db y sectio n 11 2 o f

th e GA-T o determin e whethe r you r facilit y i s regulate db y thi s action , yo u shoul dcarefull y examin e al l o f th e applicabilit y criteri ai n 4 0 CFR

- . 63.10 0 an d4 0 CF R63.190
. I f yo u have
. question s regardin g th e applicabilit y o f thi s actio n t o aparticula r entity , consul t th e perso n liste di n th e precedin g FO R FURTHE RINFORMATIO N CONTAC T section . B. Copies of

Regulatory Text Th e propose dregulator y tex t i s no t include di n thi s Federa l Registe r actio n becaus e o f

th e lengt han dcomplexit y o f th e amendment s t o th e rule
. Th e propose dchange s t o th e rul e ar e discusse dfull y i n thi s preamble
. Th e propose damendment s t o th e rul e ar e availabl e i n Docke t

A-90-1 9 o r

b y reques t fro mth e Ai r

an dRadiation
. Docke t an dInformatio n Cente r (se e ADDRESSES) o r

th e EP A contac t

perso n liste di n th e precedin g FO RFURTHE

R INFORMATIO

N CONTAC

T section ; Th e propose drul e amendment s ma y als o b e •obtaine dove r

th e Interne t

a t http:/ / ttnwww.rtpnc.epa;go v o r fro mth e EPA' s Technolog y Transfer , Networ k (TTN)
. Th e TT N i s anetwor k

o f electroni c bulleti n hoard s :develope dan doperate d• ; b y th e Offic e o f

Air.Qualit y Plannin g an dStandards
. Th e servic e i s free, ( excep t for.th e cos t

o f aphon e call
. Dia l (919 ) 541-574 2 fo r

u p t o a14,40 0 bit s pe r secon dmodem
. Selec t TT N Bulleti n Board i Clea n Air.Ac t

Amendment s and
. selec t men u ite mRecentl y Signe dRules
. I f mor e informatio n o n TT N i s needed , contac t th e system s operato r

a t (919 ) 541-5384
. C
. Electronic Submission of Comments Comment s o n th e propose dchange s t o th e NESHA P ma y als o b e submitte d electronicall y b y sendin g electroni c mai l (e-mail ) to : a-and-r

dbcket@epamail.epa;gov
. Electronic ; comment s mus t

b e submitte da s a n ASCI I file avoidin g th e use.o f specia l character s an dan y for mofencryption
. Comment s wil l als o b e accepte do n diskett e i n WordPerfec t 5. 1 o r ASCI I fil e format
. Al l comment s i n electroni c form mus t b e identifie db y th e docke t numbe r A-90-19
. N o Confidentia l Busines s Informatio n (CBI) shoul db e submitte d throug he-mail
. Electroni c comment s ma y b e filedonlin e a t

man y Federa l Depositor y Libraries
. D.'Background.on Rule O n Apri l 22,4994.(5 9 F R19402) , an d Jun e 6,1.99. 4 (5 9 FR29196) , th e EP A - publishe di n th e Federa l Registe r th e - . NESHA P for.th e SOCMI , an dfor severa l othe r processe s subjec t

t o th e equipmen t leak s portio n o f

th e rule
. Thes e regulation s wer e promulgate da s subpart s F , G , H , an dTi n 4 0 CF Rpar t 63 , an dar e commonl y referre dt o as'th e hazardou s organi c NESHAP , o r th e HON
. Sinc e th e Apri l 22,199 4 notice , - ther e hav e bee n severa l amendment s t o clarif y variou s aspect s o f

th e rule
. Readers ; shoul dse e th e followin g Federa l Registe r

notice s fo r

mor e information : Septembe r 20 , 199 4 (5 9 F R 48175);-October,24,199 4 (5 9 F R53359) ; Octobe r 28,1994.(5 9 F R54131) ; Januar y 27 , 199 5 (6 0 F R5321) ; Apri l 10,199 5 : (6 0 FR18020) ; Apri l 10 , 199 5 (6 0 FR
. 18026) ; Decembe r

12,199 5 (6 0 F R 63624) ; Februar y 29,199 6 (6 1 F R7716) ; and-Jun e 20,199 6 (6 1 F R31435)
.

. ' I n Jun e 1994 , th e Chemical
. Manufacturer s Associatio n an dDo w Chemica l Compan y file dpetition s fo r revie w o f

th e promulgate drul e i n th e U.S
. Cour t

o f Appeal s fo r

th e Distric t

o f Columbi aCircuit , Chemical Manufacturers Association v. EPA; 94

- 146 3 .an d94-7136 4 (D.C
. Cir. ) an dDow. Chemical Company v. EPA, 94-146 5 (D.C
. Cir)
. Th e petitioner s raise dove r 7 5 technical.issue s o n th e rule' s structur e an dapplicability
. Issue s wer e raise d regardin g detail s o f

th e technica l requirements ; draftin g clarity , an d structura l error s i n th e draftin g of
. certai n section s o f

th e rule
. Today' s propose drevision s addres s al l o f th e issue s raise db y CM A an dDo w o n th e

Apri l 199 4 rule
. Wit htoday' s action , EP A i s proposin g clarifyin g an dcorrectin g amendment s t o subpart s F , G,H , an dI o f par t 63
. Followin g revie w an dconsideratio n o f comment s receive do n today' s propose d- revision s i n accordanc e wit ha settlemen t

agreemen t

reache dwit h l CM A an dDow , EP A wil l tak e fina l actio n o n th e propose damendment' s b y Decembe r

31,1996
. A s o f

th e dat e o f signatur e of

thi s proposal , th e sectio n 113(g ) notic e proces s wa s ho t ye t complete , and , therefore , the ' settlemen t wa s no t final. However , EP A believe s i t i s importan t

t o publis hth e propose d rul e i n accordanc e wit hth e schedul e provide di n th e draf

t settlemen t agreemen t

because , o f

th e pendenc y o f th e complianc e date
. Whe n asettlemen t become s final, i t

wil l gover n th e dat e o f signatur e o f

th e fina l rule
. A s discusse d i n sectio n III.B , source s subjec t t o th e rul e woul db e expecte dt o b e i n complianc e wit hth e amende d
. '
. provision s fo r

hea t exchange , systems , maintenanc e wastewater , in-proces s equipmen t

subjec t to
. § 63.149 , an d proces s wastewate r

b y Apri l 22 , 1999
. Equipmen t

subjec t t o th e othe r provision s o f

th e rul e woul db e expecte dt o b e i n complianc e b y Apri l 22,1997 , unles s acomplianc e extensio n i s granted
. Th e EP A anticipate s finalizin g som e portion s o f th e propose d rul e earlier , tha n Decembe r 31,1996
. Fo r example , th e proposa l woul deliminat e th e nee dfor

filin g som e implementatio n plan s tha t

woul dotherwis e b e du e Decembe r

31,1996 , an dwoul dallo w th e filin g of

request s for

complianc e extension s u p t o 4 month s befor e th e April-199 7 complianc e date
. Th e EP A wil l attemp t

t o tak e final actio n o n thes e provision s a s soo n a s possibl e afte r th e clos e o f th e commen t

perio di n orde r

to 1 giv e source s a s muc hlea dtim e as . possible
. - • II
. Overvie w o f

Change s t o Rul e Wit htoday' s propose daction , EP A i s proposin g clarifyin g an dcorrectin g amendment s t o subpart s F , G , H ; an dI o f 4 0 CF Rpar t

63
. Thes e propose d amendment s includ e a n extensio n o f th e complianc e dat e t o Apri l 22,199 9 fo r processiwastewater , hea t exchang e systems, : maintenanc e wastewater , an d in-proces s equipmen t

subjec t t o th e provision s o f

§63.149
. Thes e section s o f th e rul e woul db e extensively , revise db yP. 4 j*l*jS« ^ 4370 0 Federa l Registe r/ Vo l 61 , N o 16 6 /

Monday , Augus t

26 , f99' 6 /Propose d"Rules ' -"7<3f " today' s proposal
. Th e propose d revision s ar e intende dt o remov e an y ambiguity an dclearl y conve y EPA' s intent , t o mak e th e rul e easie r t o rea d an dimplement , an dt o increas e flexibility fo

r th e source . Th e propose damendment s woul d als o se t aseparat e complianc e dat e fo r wastewate r

stream s affecte db y th e omissio n o

f nitrobenzen e fro

mtabl e 9 o

f subpar t G
. A thre e year

complianc e dat e i s bein g propose dfo

r proces s wastewate r

stream s tha t

ar e subjec t

t o contro l requirement s du e t o th e presenc e o

f nitrobenzen e du e t o a n erro r

. i n th e Apri l 22 ; 199 4 rule
. The , '•• complianc e dat e fo

r othe r emissio n point s remain s Apri l 22,1997
. Th e propose drevision s t o th e . wastewate r

section s of

th e rul e hav e : bee n redrafte dt o improv e organizationa l structur e an ddraftin g clarity
. On e significan t

clarificatio n woul db e t o th e definitio n o f "wastewater " whic hwoul db e revise d t o incorporat e th e concep t tha t only ' whe n wate r

i s discarded

fro maproces s i s i t subjec t t o th e HON wastewate r provisions
. Additiona l change s woul d b e mad e t o th e wastewate r provision s to : (1 ) ensur e tha t

stream s travelin g fro

m on e piec e of

proces s equipmen t

t o anothe r woul db e handle dappropriatel y t o avoi demission s t o th e environment , an d(2 ) ensur e tha t

th e change s i n th e wastewate r

definition s woul dno t permi t source s t o dilut e thei r

waste stream s prio r

t o th e poin t

th e stream s ar e considere dwastewater , thu s avoidin g contro l requirements , I f aHON sourc e owne r

o r operato r wishe dt o shi p wast e off-sit

e fo r treatment , th e owne r

o r operato r may onl y shi p t o afacilit y tha t ha s certifie dtha t

i t wil l trea t th e wast e t o th e standar drequire db y th e HON
. I n contras t

t o th e significan t

redraftin g o f th e wastewate r

provisions , mino r edit s ar e propose dfo

r othe r section s o

f th e rule
. I n additio n t o removin g ambiguit y an dincreasin g flexibilit y fo r th e source , som e revision s woul d reduc e th e reportin g an drecordkeepin g burde n fo r sources . Th e reportin g an d recordkeepin g revision s woul dinclud e change s which : reduc e th e number ; o f copie s of report s that-mus t

b e submitte d t o EPAan dth e States ; provid e for ' alternative , les s frequen t

recordkeepin g of monitorin g data.wher e source s sho w n o violation s for

prolonge dstretche s o

f time ; an dremov e th e requiremen t fo r v mos t source s t o file a n implementatio n plan
. •••--•.. • III . Compliance Dat e Change s an d Othe r Genera l Change s A. Applicability of

Rule 1
. Designatio n o

f th e Sourc e I n today' s amendments , EP A i s proposin g revision s to § 63.100 , paragraph s (e

) an d(f ) t o clarif y whic h equipment

i s include dwithi n th e scop e o f th e sourc e regulate db y thi s rule
. Thes e revisions are bein g propose d> becaus e th e draftin g an dstructur e o f paragraph s (e

) an d(f ) i n §63:10 0 hav e •--••••:.

- cause dconfusio n an draise dconcern s as'-- : t o whethe r

othe r equipmen t

of activitie s notliste dar e include di n th e source . • s Th e propose drevisions t o thes e ' paragraph s ar e intende dt o improv e rule;•' ; clarity : Th e presen t

wordin g o

f paragrap h(e ) o f § 63.10 0 incorporates , inte r alia , "wastewate r

an dassociate dtreatmen t
. residuals " i n th e source . Thi s tex t doe s no t stateexplicitl y whethe r

wast e managemen t

units , heat

exchang e systems , or

maintenanc e wastewate r are . include di n th e source . Th e presen t designatio n o f

th e sourc e als o doe s no t includ e contro l device s or recovery device s use dt o compl y wit hthi s rule
. " : Some industr y representative s hav e expresse dconcern that

thes e type s o

f equipment

coul db e considere dsubjec t to sectio n 112(g ) o

f th e Ac t becaus e th e equipmen t

i s no t par t o f asourc e subjec t t o asectio n 112(d) standard
. T o addres s thi s concern , th e EP

A i s proposin g t o revis e thi s paragrap hby listin g th e specifi c categorie s o

f equipmen t

an d type s o f wastewate r

include di n th e • sourc e an db y addin g contro l an d recovery device s t o th e item s designate d t o be
. include di n th e source . Th e EP A i s als o proposin g t o revis e paragrap h(f ) o f § 63.10 0 t o revers e th e draftin g structur e t o stat e that

th e liste ditem s are include di n th e source , bu t ar e no t
. subjec t t o th e contro l requirement s of th e rule
. Base do n discussion s wit h industry , EP

A ha s foundtha t

reversin g th e structur e woul dmake i t mor e understandabl e t o th e regulated , community an dwoul dreduc e th e chanc e o f incorrec t interpretation
. - 2
. Definitio n o

f Chemical Manufacturin g Proces s Uni t

(cmpu ) Th e EP A i s proposin g amendment s t o : clarif y th e definition'o f

cmp u an dth e definitio n o

f uni t operation
. Th e propose drevisions consis t of clarifyin g tha t acmp u consist s o

f tw o o r mor e uni t operation s an dcorrectin g th e definitio n ' : o f uni t operatio n t o refe

r t o th e define d term"distillatio n units " instea do f distillatio n columns
. Thes e propose d change s are expecte dt o clarif y th e determinatio n of applicabilit y fo

r facilitie s withintegrate doperations
. 3
. Applicabilit y of

Rul e t o Storag e Vessel s Locate di n aTan k Farmo r Marin e Termina l Th e EP A is
. proposin g amendment s t o clarif y th e applicability o

f th e rul e t o storag e vessel s locate di n tank farm s an d marin e tan k

farms
. Th e propose d amendment s bein g adde da s § 63.100(g)(3 ) woul dexplicitl y specif y th e procedure s t o b e followe dt o assign , th e storag e vesselsjt o aproces s an dtie n t o determin e th e applicabilit y o f the ; ; . rule.ipue.t p a n oversight, " th e provision s '•• currentl y i n § 634G0(g ) o f subpar t F;dp h no t includ e instruction s regardin g allpcatipn,.o f

tank s h i remote.locatipns., r Followin g issuanc e o

f th e 199 4 rule , EP A receive dinquirie s regardingthe'. , applicabilit y o

f th e rul e t o storag e vessel s tha t

are physicall y remot e from th e cmpu, . bu t

ar e locate dat

th e major sourc e an dconnecte dt o th e cmp u b y piping
. Som

e of.th e inquirie s raised , question s regardin g th e distinctio n betwee n storag e vessel s use dfo r product-storag e an dvessel s use dmor e for purpose s o

f facilitatirig.produc t ; distribution
. Othe r

inquirie s concerne d applicabilit y o

f th e rul e wher e a. dedicate dproduc t

(o r ra w material ) storag e tan k

wa s locate di n th e tan k

/ farm
. Followin g arevie w of th e rul e language , an dth e underlyin g analyse s fo r th e rule , EP A conclude dtha t th e recor do n thi s poin t

wa s ambiguou s an d tha t th e rul e shoul db e amende dt o clarif y thes e issues
. Th e propose d revision s t o § 63.100(g ) ar e base do n th e concept s presentl y use di n th e rul e fo r assignmen t

o f equipmen t

tha t i s share d amon g severa l cmpu s an do n abasi c assumptio n use di n developin g th e rul e that, ; whic hi s typicall y acmpu,. . include s ra w materia l an dproduc t storag e vessels
. , ; ?
. Th e propose dprovision s assig n a storag e vesse l t o acmp u base do n thre e decisio n rules
. First , astorag e vesse l i n atan k far mi s considere dt o b e part o f acmp u onl y i

f th e cmp u doe s no t

hav e anothe r intervening , storag e vessel fo r produc t (o r ra w material)
. Wher e ther e .

. ' i s a n intervenin g storag e vessel , the'
. boundar y o

f th e cmp u woul den dat

tha t intervening.storag e vessel (an dan y ' associate dtransfer

"opefatibnsari dothe r equipment ) an dwoul dexclud e th e tan k far mstorag e vessel. : Second , if tw o o r mor e cmpu s (o

f thos e usin g th e tan k far mstorag e vesselj'lac k

aco-locate d storag e vessel , the n th e storag e vessel at the'tan k farmwoul db e assigne dt o a' cmpu , accordin g t o th e concept s o f predominan t

us e specifie di n § 63.100(g)(2)
. Third , if

onl y on e cmp u (o f thos e tha t

us e th e remot e storag eP. 5 •tfiivw-Aif


### •' ]_2^_^2L t^^^iMe^^/

^ol. 'Sii No
. 16 6 / Monday , Augus t

26 , 199 6 /

Propose dRule s 4370 1 vessel) lacks aco-locate dproduc t (or .- . ra w material ) storag e vessel , the n th e remot e storag e vesse l would,b e assigne d t o tha t cmpu . Th e EP A expect s tha t

thi s assignmen t procedur e wil l resul t

i n assignmen t

o f storag e vessel s i n amanne r consisten t wit hnorma l managemen t o f facilit y operations
. Specifically , i t i s expecte d tha t storage , vessel s tha t

are ' a n integra l par t of operatio n o f

acmp u subject.t

p th e HCJN-wil

l b e regulate dunde r

th e •:•_ HON[ and
. tha t

storag e .vessel s tha t

are ; - use dto,.facilitate , produc t distributipn,, ; *.. wijLbe^fegulatedas^^part,pfth e organi c ,; - liquid s distribution.sourc e Categoryjand , nptunder^eHQl€^ r

>- ; '•.'• • -,, ^ V ::•••;,;)•. 4
. petermihatipn'ofApplicabilit y of thev ; Ruleto'EquTpment-Share dAmon g ' " -'••''' " Integrated^Operatioh s •'[•••

. Today's , propose darriendment s includ e clarifyin g change s t o th e equipmen t

assignmen t

procedure s specifie di n §63.10 0 (g) , (h) , an d(i ) fo r storag e vessels , transfe r

racks , an d'
. distillatio n units : Sinc e th e HON wa s issuedi n Apri l 1994 , EP A , ha s receive d• inquirie s regardin g th e correc t interpretatio n o

f the,tex t i n thes e paragraphs
. Base do n thes e inquirie s . an ddiscussion s wit hindustr y '•• representatives , EP

A ha s conclude dtha t th e question s an dconcern s ar e du e to mino r wordin g difference s i n paragraphs'(g ) an d(h ) an dth e absenc e o f a n explici t

statemen t

tha t paragrap h (i) specifie s th e assignmen t procedure s fo r share ddistillatio n columns
. Today' s propose damendment s woul d mak e th e wordin g an dstructur e o f thes e paragraph s parallel
. Specifically , th e , propose drevision s woul dmak e th e wordin g of

paragraph s (g)(1 ) an d(h)(1 )

. paralle l t o th e wordin g i n paragraph s (g)(2 ) an d(h)(2) , respectively
. Th e . propose dne w paragraph s woul dad d provisions ; to paragrap h(i ) tha t addres s ; th e assignmen t

o f dedicate ddistillatio n unit s an dwoul dclarif

y tha t th e assignmentprocedur e i s fo r distillatio n ••• unit s share damon g severa l processes . Th e propose drevision s als o clarif y th e wordin g of-th e requiremen t t o reasses s th e assignmen t

of th e equipmen t

:•. wheneve r ther e i s achang e i n th e us e o f th e equipment. : -.-

. .-, . 5
. Revisio n t o Table" 2 ofSubpar t FLis t o f Regulate dHazardou s Organi c Air'•'""''
. Pollutant s (HAP's ) V ."'•'"••- ' Th e EPA ha s receive dnumerou s request s fo

r clarificatio n o

f th e definitio n o f

"Polycycli c organi c •-,

- matter";(PpM ) i n tabl e 2 of subpar t F., Th e natur e o f

thes e request s indicate s tha t there , i s confusio n regardin g th e scop e of th e definition
. T o eliminat e thi s confusion , EPA i s proposin g t o revis e tabl e 2 of subpart Ft o lis t th e specifi c compound s tha t

ar e t o b e regulate da s POM i n th e HON
. Th e specifi c compound s bein g liste dar e consisten t withth e historica l workin g definitio n o

f POM , whic hemphasize s emission s fro

mincomplet e combustio n an dpyrolysi s processe s (4 9 F R31680)
. Thi s chang e i s expecte dt o improv e rul e clarity
. B> Compliance

Dates 1
. Complianc e Dat

e Extensio n fo

r Waste wate r

Provisions
. .. . Wit hrespec t

t o complianc e date's','th e filial-rul e {promulgate do n Apri l 22 , -".," : 1994 ; provide dtha t

existin g source s • must , b e i n complianc e with ; th e -'-'.; ' retirement s o

f subpart s Fan dGn o late r tha n April.22,1997 , unles s an extensio n i s grante di n accordanc e wit h § 63..151(a)(6 ) ofsubpar t

Go r §63.6(i ) of subpar t A
. Today' s proposal woul dchang e th e complianc e dat e provision s applicabl e t o HON
. source s i n tw o significan t respects
. Thes e change s ar e include din
. § 63:i00(k)(2 ) o

f today' s propose drule
. First , § 63.100(k)(2)(ii ) would.se t ane w compliance.dat e o

f Apri l 22,
. 1999 , fo

r hea t exchang e systems , maintenanc e wastewater , in-proces s equipmen t subjec t to § 63.149 , an dproces s wastewater
. Second , §63.100(k)(2)(ii)(A ) woul dse t ane w complianc e dat e tha t i s thre e year s fro

mth e dat e o

f final publicatio n for
. proces s wastewate r stream s an din-proces s equipmen t subjec t t o § 63.14 9 tha t

ar e subjec t

t o contro l requirement s du e t o th e contributio n o

f nitrobenzen e to th e annua l averag e concentratio n o f Tabl e 9 compounds
. Th e ne w complianc e dat e fo r heat exchang e systems , maintenanc e wastewater , in-proces s equipmen t
. - subjec t t o § 63.149 ; an dproces s wastewate r

i s bein g propose dbecaus e th e change s t o thes e provisions ^ applicabl e t o HO

N source s ar e sufficientl y fa

r reachin g an dcomple x t o rende r thos e provision s effectivel y a.-• . . ne w rul e warrantin g ane w complianc e date
. In contrast , th e change s t o othe r . portion s o

f th e Apri l 22,1994 , rul e are les s extensive , ar e mor e i n th e natur e of correction s an dclarifications ; an dEPA " doe s no t believ e the y jeopardize
. : ; resources ' ability t o mee t

th e Apri l 199 7 complianc e date
. Sectio n 112(i)(3 ) of

th e Ac t provides ^ - tha t existin g source s ar e t o b e i n complianc e wit happlicabl e emissio n . . standard s "a s expeditiousl y a s . 6 ; practicable , bu t

i n noeven t

late r than , 3
. years-after th e effectiv e dat e pf

suc h'.'•'
. standard. " Th e Apri l 22,1994 , final rule

specifie dacomplianc e dat e applicabl e to wastewate r stream s an dhea t exchang e system s tha t

wa s thre e year s fro mth e issuanc e of

tha t rule
. Sectio n 112(d)(6 ) provide s authorit y fo r th e Administrato r

t o revis e th e emissio n standard s issue dunde r

sectio n 11 2 "n o les s often tha n every 8 years. " EP A believe s that

th e authorit y t o revis e th e standard s inherentl y include s th e authorit y t o set

ne w complianc e date s fo r revise drules
. An y othe r

approac h woul drequir e existin g source s t o com e int o complianc e wit hpotentiall y • extensiv e revisions.immediately,jus t a s if the y wer e ne w sources . Obviously , Congres s provide dEP

A discretio n t o se t acomplianc e dat e fo

r existin g source s of u p t o thre e year s i n orde r to
. provide 1 , time'fo r retrofittin g of

controls-wher e necessary . Thus , ;du e t o th e extensiv e natur e o f th e revision s t o th e provision s applicabl e t o heat

exchang e system s an d
. wastewate r

streams , th e creatio n o

f requirement s fo

r in-proces s equipmen t subjec t t o §63.149 , an dth e proximit y t o th e Apri l 199 7 complianc e dat e i n th e . originalrule , EPA i s settin g ane w Complianc e dat e fo

r thos e provisions
. EP A believe s tha t

tw o year s fro

mth e - otherwis e applicabl e complianc e dat e , will b e sufficient

fo r al l source s t o com e int o compliance i wit hth e ne w wastewate r

an din-proces s equipmen t provisions
. However , shoul dan y sourc e b e unabl e t o mee t

tha t complianc e dat e becaus e of

th e nee dt o instal l control s that canno t b e installe db y tha t

date , suc hsourc e ma

y reques t a n extensio n o

f u p t o on e yea

r i n accordanc e wit h §63.151(a)(6)
. , : '.
. / Th e ne w thre e year

complianc e dat e i n § 63.100(k)(2)(ii)(A ) fo

r process wast e wate r

stream s an din-proces s equipmen t

subjec t t o §63.14 9 tha t

ar e subjec t t o contro l requirement s du e t o th e presenc e o

f nitrobenzene;-i s bein g propose dbecaus e o

f a n erro r i n th e ' • Apri l 22 „ 1994 , rule
. Nitrobenzen e i s a HAP include do n thesectio n 112(b ) list
. However , du e t o an oversight , i t wa s no t include do n tabl e 9 (whic hlist s HAP s subjec t t o th e wastewate r

provisions ) i n th e Apri l 22,1994 , rule.Th.us.ither e wa s confusio n a s t o whethe r

o r no t th e '••'. presenc e o

f nitrobenzen e i n wastewate r

- stream s shoul db e afacto r i n determinin g whethe r

suc hstream s wer e Grou p 1 o r

Grou p 2 : Thi s erro r

wa s correctedi n th e December 12,1995 , correctio n notic e ^6 0 F

R6362 4 ; . (December

12,1995))
. However , du e t o - th e extensiv e change s t o th e wastewate r provision s an dth e uncertaint y cause d b y th e initia l omissio n of nitrobenzen e > fromtable;9,BP A i s proposin g tpise t a new-complianc e dat e for

wastewater
stream s affecte db y th e error . EP A seek s commen t

o n it s proposa l t o se t ne w complianc e date s i n § 63.100 ,P. 6

• •.••V".--v-v-.'.vVi'-^ ^ 

### 4370 2 - v Feaeral^egi^ ^ __^^__^_^_^__

_.. . . . _~ • • :. - . ••. . .' ^ • • -• - ••• "•'V'.'i'. t

-v.' , ~-iji'...'.nH.V^'^i5ii£«H&?!-i>j paragraph s (k)(2)(ii ) an d(k)(2)(ii)(A) , an di n particula r

seek s commen t

o n th e appropriatenes s o f

th e particula r

date s proposed
. 2
. Timin g o

f Complianc e Extensio n Request s Th e Apri l 22,1994 , rul e require s tha t request s fo

r complianc e extension s b e submitte don e year

prio r t o th e otherwis e applicabl e complianc e date
. . Th e EP A i s proposin g t o revis e thi s requirement , whic his
. i n § 63.151(a)(6)(i) , t o allo w submitta l of , request s u p t o 12 0 day s prio r t o th e .'••• complianc e date
. Th e EP A i s als o proposin g t o ad dane w paragrap h(iv ) t o § 63.151(a)(6 ) tha t

woul dallo w request s durin g th e las t

12 0 day s befor

e th e complianc e dat e if

th e nee daros e durin g that
. 12 0 day s an dif th e nee dwa s du e t o circumstance s beyond , th e reasonabl e contro l o f

th e owne r

o r operator
. Submissio n of

acomplianc e extensio n reques t

woul dno t

sta y th e applicabilit y o f

th e rul e t o th e applican t sourc e durin g th e pendenc y o f th e request
. • Th e EP A i s proposin g thes e revision s " i n recognitio n tha t

revie w of

mos t request s for

complianc e extension s can b e complete dwithi n 4 month s an di t i s unlikel y tha t

i t woul drequir e 1 2 month s t o complet e revie w o f th e request
. Th e EP

A i s als o proposin g t o allo w submitta l o

f extensio n request s u p t o th e complianc e dat e i n recognitio n tha t unforesee n difficulties , suc ha s constructio n o r

operationa l difficulties , can aris e i n th e las t

moment s o

f complianc e planning
. Th e propose d provision s i n § 63.151(a)(6)(iv ) are als o considere dnecessar y i n th e cas e o f thi s rul e becaus e i t

i s unlikel y tha t

thes e propose drevision s wil l b e fina l more tha n 4 month s prio r

t o th e Apri l 22 , 1997 , complianc e dat e fo

r certai n contro l requirements
. An y change s i n th e wordin g o r

requirement s o

f th e final rul e coul daffec t

complianc e plannin g fo r asource . Therefore , EP

A believe s tha t i t i s necessar y t o provid e some opportunit y for

application s fo

r complianc e extensio n request s afte r th e dat e tha t i s 4 months-prio r

t o th e complianc e date
. 3
. Clarificatio n of.Complianc e Period s Th e propose drevision s t o subpart F als o woul dad dane w paragrap h(k)(9 ) t o § 63:100 , an dane w paragrap h(g ) t o ., § 63.16 2 t o clarif

y tha t whe n th e rul e specifie s aperio dof

tim e fo r completio n o f require dtask s (e.g. , weekly , monthly , quarterly , annual) , thi s refer s t o : standar dcalenda r

period s unles s i t

i s specifie dotherwis e irtth e sectio n o r paragrap htha t

impose s th e requirement
. Th e curren t

rul e doe s no t

specif y this , an dthi s tex t

i s bein g adde dtp.th e rule ; ' t o remov e an y potentia l fo r ambiguity
. : > Th e ne w §63.100(k)(9 ) an d§ 63.162(g ) als o provid e tha t

tim e period s ma

y b e change db y mutua l agreemen t betwee n th e owne r o r operato r an dth e Administrator^ a s provide di n subpart A o f thi s part
. Finally , thi s ne w se t o f provision s als o provide s tha t if th e rul e require s completio n o

f atas k durin g eac ho f multipl e successiv e periods , a n owne r o r operato r may performth e require dtas k

at an y tim e durin g th e ',..

- specifie dperiod , provide dth e tas k i s conducte dat

areasonabl e interya l afte r completio n o f

th e prewoi ^ th e rul e wa s originall y .drafte ditwas v j : : . assume dtha t

thi s coul dbe,done, ' bu t

a n oversigh t i n draftin g languag e specifyin g thi s wa s omitte dfro

mth e rule , j ..;... . >

' C Heat Exchanger

Provisions "''"• I n today' s amendments , th e EPA
. is ; / proposin g ne w requirement s fo r monitorin g hea t

exchang e systems.fo r leak s of proces s fluid s int o coolin g water
. Th e propose d§ 63.10 4 woul d replac e th e existin g provision s i n , § 63.10 4 of

subpar t F
. Th e propose d revision s are bein g mad e t o addres s issue s withth e existin g provision s relate dt o th e availability o f monitorin g method s wit hsufficient : analytica l sensitivity , lac k

o f flexibility i n some of th e requirements , an dth e burde n associate dwit hth e monitoring

requirements
. Th e major

revision s t o thi s sectio n of

th e rul e an dth e reason s fo r th e change s ar e describe dbelow
. 1
. Condition s Exempte dFro m Monitorin g Requirement s Th e existin g provision s o f § 63.10 4 exemp t tw o categorie s o

f hea t exchang e system s fro

mth e monitorin g requirements
. Th e firs t

exemp t categor y i s hea t exchang e system s operate dwit h agreate r pressur e o n th e coolin g wate r side ; Thes e system s wer e exempte d becaus e an y leakag e woul db e int o th e proces s fluid , no t

int o th e coolin g water , s o i t i s no t necessary t o monito r

th e . coolin g wate r

fo r th e presenc e o

f - proces s fluids
. Th e second-exempte d; " category i s onCe-thfoughhea t exchang e system s operatin g wit haNationa l Pollutan t Discharg e Eliminatio n Syste m (NPDES ) permi t

allowabl e discharg e limi t of less-than 1 ppm ; Thes e tw o categorie s wer e exempte dbecaus e th e provision s of

§63.10 4 woul dimpos e a redundant requirement ; Th e propose d revision s t o § 63.10 4 Wouldexten dthi s exemptio n t o thre e additiona l cases . , First , facilitie s wit hNPDES permit s that require monitorin g of

aparamete r

o r conditio n tha t

woul ddetect aleak

o f ' ' proces s fluid s an drequires th e owne r o r operato r t o report an dcorrec t

leak s wheh'the'paramete r p r condition ' V''••^n ••; ;

. _ exceed s m e nbnn drange dFo r facilitie s wit hsuc hNPDE

S permi t th e requirement s i n §63.10 4 woul db e redundan t

withth e NPDE S permi t requirement
. Second , system s wher e ther e i s an intervenin g coolin g flui d (containin g les s tha n 5 % b y weigh t o f th e applicabl e HAP's ) betwee n th e proces s an dth e coolin g wate r woul db e exempted
. I n thes e systems ; th e monitorin g requirement s o f § 63.10 4 ar e unnecessary becaus e leak s o f proces s fluid s woul db e detecte di n intervenin g processeqiiipmeh f

befor e there

- coul dbe'•:•

' aleakiht o the'coolin g : 1yaferrThe:tHircl' * exemp t categor y i s system s use dt o cool " proces s fluids tha t

containiejssi'Jhanj5% f ,. ' b y weight H^'s
. ^i s las t

categpry o f hea t exchang e systemsi;is,bpin g adde d\ : becaus e i t i s consisten t

wit hth e inten t tha t provision s only;reb^uir

e mprutorin g whe n HAP 'safe presen t

i n ; )".:'''"'•'•'.•. cbnceritfations.greaterthan5 % by
. - weight : i'.''. ' ' ; . ' 2
. Hazardou s Ai r

Pollutant s Subjec t

t o Monitorin g Requirements : Th e Apri l 22 ; 1994 , rul e require s - owner s o r operator s of

recirculatin g hea t exchang e system s t o monito r for organi c HAP' s liste di n fabl e 2 o f

subpar t F , excep t for fou r water-reactiv e HAP's
. Today's/propose damendment s woul d reduc e th e numbe r

of organi c HAP' s subjec t t o th e monitorin g requiremen t fo r thes e recirculating systems
. Th e revise dlis t

o f organi c HAP' s subjec t

thi s requiremen t

i s provide di n propose d tabl e 4 o f subpart F
. Ther e ar e n o propose dchange s t o th e organi c HAP' s subjec t t o th e monitorin g requiremen t (foun di n tabl e 9 o

f subpar t G ) for once throug hcoolin g systems
. Sinc e th e Apri l 22,1994 , rul e wa s issued , EP

A ha s receive dinquirie s regardin g th e basi s fo

r th e requiremen t t o monito r

fo r tabl e 2 compound s i n coolin g wate r

of recirculatin g hea t exchang e systems
. Som e industr y representatives hav e questione dth e inclusio n of

compound s tha t

ar e no t o n tabl e 9 o f subpart G.andhav e argue d tha t coolin g tower s are-ineffectiv e at ai r strippin g relatively nonvolatile ' compound s (i.e. , compound s no t i n tabl e 9 ) liste di n tabl e 2 o f subpar t F...I n response t o thes e questions , EPA modele dth e potentia l ai r emission s o f eac htabl e 2 Compoun dfro maprocess "
. coolin g tower
. Thi s analysi s indicate d tha t tJher e ar e abou t

2 3 compounds" : '
. liste di n tabl e 2 o

f subpar t Ftha t hav e no , o r very insignificant,'potentia l fo r emissions
. Example s o

f organi c HAP compound s tha t

wer e foun dt o have ' • littl e potential-fo r

volatillzatib hi n a v : coolin g towe r

ar e ethylen e glyco l ari d acrylamide
. Base do n thi s modelin g4'f Q. ' '• ? 'Zi^g^-zf^^gflSM Federal c Registe r/

Vol
. 61 , No
. 16 6 /

Monday , Augus t

26 , 199 6 /

Propose dRule s 4370 3 analysis , EPA Conclude dtha t i t woul d b e appropriat e t o appl y monitorin g requirements t o som e compound s o n tabl e 2 of subpar t Fa s wel l a s t o compound s liste do n tabl e 9 o f subpart G
. Thi s conclusio n i s base do n findin g tha t ther e ar e anumbe r

o f compound s whic hhav e a n insignifican t potentia l fo r emissio n fromtypica l wastewate r collectio n an dconveyanc e system s bu t whic hca n hav e fairly substantia l losse s whe n sen t

throug haproces s coolin g tower
. Propose dtabl e 4 list s th e compound s modelle dt o hav e '; ; -; : -.V;. ' signifiCTnteiriissionpotentia l whe n sen t throug haprocessVcobiin g towef. ; Also , i n orde r t o limi t monitorin g t o onl y thos e compound s calculate dt o hav e significan t

emissio n potentia l an dt o elimmat e unnecessar y burden,;prbpose d tabl e 4 list s specifi c glyco l ether s instea dof th e famil y o

f compounds
. Thi s wa s don e becaus e different glyco l ether s hav e significantl y different physica l properties
. 3
. Adde dFlexibilit y t o Monitorin g Requirement s Th e rul e currentl y require s monitorin g of

cooling , wate r

usin g an y EP A approve dmetho di n 4 0 CF Rpar t 13 6 a s lon g a s th e metho dcan measur e concentration s of

th e compoun da s lo w a s 1 ppm . Sinc e issuanc e o f th e rul e i n Apri l 1994 , EP

A ha s receive d informatio n tha t

th e method s i n 4 0 CF

R par t 13 6 ar e no t

availabl e fo

r some HAP' s an dtha t

th e additiona l requiremen t

fo r measuremen t

sensitivit y furthe r reduce s th e numbe r

o f availabl e methods-
. T o correc t

thes e implementatio n problems , EP A i s proposin g th e following revisions t o §63.104
. .. . Th e propose d§ 63.10 4 include s

- provision s tha t

woul dallo w monitorin g of asurrogat e indicato r

o f aheat exchange r

leak i n lie u of monitorin g fo

r specifi c organi c HAP' s i n th e coolin g water
. Thi s ne w optio n i s bein g propose dbecaus e o

f analytica l limitation s an dcost s o

f measurin g som e o f th e organi c HAP' s regulate db y thi s provisio n an dbecause , i n some cases , th e inten t o f thi s sectio n ca n b e me t

b y usin g asurrogat e indicator
. Propose d § 63.10 4 als o include s provision s tha t woul dallo w monitorin g o f asurrogat e indicato r suc ha s io n specifi c electrod e monitoring ; pH;!Or:other physica l \ propertie s o f

th e coolin g wate r

o r process^operations
. Th e EP A expect s tha t thi s optio n woul db e usefu l i n case s wher e ther e ar e n o EP

A approve d method s fo r

an y compound s i n th e proces s o r

wher e therear e easil y : measure dproces s parameter s tha t provid e areliabl e indicatio n o f hea t exchange r

leaks : Unde r

thi s ne w alternative , a n owne r o r operato r woul d prepar e an dimplemen t

amonitorin g pla n tha t woul dspecif

y th e parameter s tha t woul db e monitore dan dth e criteri a which , if exceeded, " woul dconstitut e a leak
. Th e owne r

or operato r woul dhav e t o updat e th e monitorin g pla n anytim e asubstantia l lea

k i s detecte db y method s othe r

tha n thos e describe di n th e pla n an didentif

y th e method s i n th e pla n tha t di dno t detec t th e leak
. Thes e provision s wer e develope dbase do n consideratio n o

f existin g program s an d wbrf c practice s a t

somj e SOCM

I facilitie s fo r detectin g leak s of

proces s fluids int o Cooling water ; It

i s expecte dtha t

thi s alternativ e wil l b e les s burdensom e tha n th e existin g requirements an dmay , allo w us e of

existin g procedure s t o mee t misfequiremeht
. ..-' • Th e EP A i s als o proposin g t o revis e th e minimu msensitivit y requiremen t fo r analytica l method s from1 pp mt o 1 0 ppm . Thi s chang e i s bein g propose dt o increas e th e numbe r

o f method s availabl e for

us e i n th e organi c HAP monitorin g alternativ e an dt o reduc e th e cos t o f thi s monitoring
. Th e EP

A selecte d1 0 pp ma s th e minimu m sensitivit y fo

r the.method.base do n consideratio n o

f th e detectio n limit s fo

r th e EP A 60 0 serie s methods
. Th e EP A als o realize s tha t

eve n wit h thi s increas e i n th e minimu msensitivit y t o 1 0 ppm , ther e wil l b e afe w compound s fo

r whic hther e i s n o approve dquantitativ e analysi s method
. Becaus e o f thi s problem , th e existin g provision s o

f § 63.104(b ) wer e revise dt o specif y tha t th e monitorin g o

f organi c HAP's'ma y b e t o monito r asubse t (on e or.more ) of

th e organi c HAP' s i n th e coolin g water
. Th e EP

A expect s tha t

thi s chang e i n th e wordin g of

th e organi c HA P monitorin g alternativ e wil l allo w monitorin g of

th e compoun d(o

r compounds ) tha t

can b e measure dan d wil l remov e th e appearanc e tha t th e monitorin g ha s t o b e capabl e o f detectin g every HA

P a t th e minimu m sensitivity
. 4
. Miscellaneou s Clarification s t o §63.10 4 Today' s proposed. § 63.10 4 woul d allo w samplin g acros s th e coolin g tower , a t th e entranc e an dexi t

of eac h hea t exchang e system , o r

an y combinatio n o f

hea t exchanger s (e.g.,

- across , acmp u or;a

t aplan t site)
. Th e Apri l 199 4 rul e specifie dtha t th e r samplingwa s t o b e acros s di e coolin g towe n Th e EPA i s proposin g t o revis e thi s requiremen t

becaus e o f

concerns ' tha t hav e bee n expresse dtha t th e ' presen t rul e i s inflexibl e an drequire s monitorin g at

alocatio n tha t

i s les s cos t effective
. Th e Apri l 199 4 rul e specifie d monitorin g acros s th e coolin g towe r becaus e o f publi c comment s receive do n th e propose drule
. Today' s propose d revision s diffe

r fro mth e origina l propose dlanguag e i n tha t ther e i s mor e flexibilit y i n th e selectio n o

f samplin g location s an dth e terminolog y ha s bee n clarifie di n tha t

th e rul e no w specificall y define s th e conventio n fo r entranc e an dexi t

o f systems
. Today' s propose drevision s t o §63.10 4 includ e clarificatio n an d correctio n of

th e existin g languag e tha t define s aleak
. Th e wordin g o f th e existin g provisio n i n §63.104(b)(l)(v ) ha s resulte di n inquirie s regardin g th e prope r interpretation
. Propose d §63.104(b)(6 ) specifie s th e typ e o f statistica l tes t

a s wel l a s th e significanc e leve l i n definin g aleak
. Th e EP A request s commen t

o n whethe r

th e 'revise dlanguag e wil l appropriatel y - identif y an dminimiz e th e numbe r o f fals e positiv e indication s of aleak
. Th e propose d§ 63.10 4 woul dalso , revis e th e dela y o

f repai r provision s t o allo w delay unti l th e nex t shutdow n if ashutdow n i s planne dwithi n 2 month s o f determinatio n tha t

dela y of repai r i s necessary , Th e propose drevision s t o § 63.104 woul dals o allo w delay o f repai r u p t o amaximu mo

f 12 0 day s if th e necessary part s o r

personne l ar e no t available
. Th e Apri l 199 4 rul e onl y allow s delay o

f repai r whe n i t can b e demonstrate dtha t

immediat e shutdow n fo r repai r woul dcreat e mor e emission s tha n th e emission s tha t

woul dresul t fro mdelayin g repai r

o f th e leakin g hea t exchange r unti l th e nex t

shutdown
. Th e propose drevision s t o th e dela y o f repai r provision s o

f th e rul e ar e bein g mad e t o mak e thes e provision s workabl e an dt o minimiz e debat e over

modeling , of emission s fromhea t

exchange r

systems
. D. Control

Alternatives 1
. Routin g Emission s t o aProcess'
. Th e EP A propose s t o ad dprovision s t o th e rul e t o allo w routin g o f emission s t o aproces s o r

fue l ga s syste ma s a means o f complianc e wher e appropriate
. Currently,.subpart s Gan d, H ar e no t amenabl e t o us e of

recyclin g t o aproces s o r

fue l ga s syste ma s a mean s o f complianc e wit hth e contro l -.- . requirements
. Thes e revision s woul d allo w us e of

thi s complianc e approac h withou t definin g ti e proces s o r

fue l ga s syste ma s acontro l devic e an d imposing , i n turn , contro l devic e ; . monitorin g an drecordkeepin g requirements , Thi s chang e i s bein g mad e t o encourag e us e of pollutio n preventio n contro l approache s an dt o reduc e th e monitorin g an d'•." recordkeepin g burde n o

f th e Tulei Th e propose damendment s consis t of : (i ) revisions t o th e definition s fo rP. 8



### 4370 4 Federa l Register / Vol
. 61 , No
. 16 6 /

Monday , Augus t

26 , 199 6 /

Propose dRules

- , proces s ven t

an dvapo r

balancin g syste man dadditio n o

f definition s fo

r fuel ga s an dfuel ga s syste mi n subpart F ; (2) amendment s t o th e storag e vessel s an dtransfe r

operation s provision s i n subpart G ; an d(3 ) additio n o

f a definitio n of

"rout e t o aprocess " an d inclusio n of

thi s Optio n i n th e lis t

o f contro l requirement s i n subpar t H
. Th e definition s fo

r fue l ga s an dfue

l ga s syste mar e basedo n th e definition s recentl y promulgate di n subpart VV , par t 6 0 an di n subpar t

CC , part 6 3 (Refiner y NESHAP)
. Th e propose d definition s hav e bee n reworde dslightl y t o remov e th e refinery-specifi c reference s an dt o refe r

t o combustio n device s mor e generall y instea do f listin g specifi c type s of

combustors.
. Th e propose damendment s t o subpart Gt o allo w recyclin g t o aproces s fo r storag e vessel s an dtransfe r operation s requir e tha t

th e recycle dmateria l b e use dor consume di n th e sam e manne r a s amateria l tha t

fulfill s th e same functio n i n th e process , b e transforme d int o amateria l tha t

i s no t a n organi c hazardou s ai r

pollutant , or

b e recovere d o r incorporate dint o aproduct
. Thes e restriction s ar e place do n thi s optio n t o • avoi dth e potentia l for

sha mclaim s of recycling
. Th e propose dprovision s fo r storag e vessel s als o include , provision s t o allo w limite dby-pas s o f th e proces s o r fuel ga s syste mdurin g period s o f maintenanc e o r

repai r o f th e proces s o r fuel ga s system
. Thes e provision s are necessary becaus e thes e storag e vessel s woul dno t

necessaril y b e emptie d durin g thes e maintenanc e period s an d emission s woul dcontinu e fro mth e vessel
. Sinc e mor e emission s woul d resul t if th e rul e Wer

e t o requir e emptyin g an ddegassin g of storag e vessel s durin g thes e period s tha n if th e vessel s were'allowe dt o ven t t o th e . atmosphere , provision s ar e bein g adde d t o § 63.11 9 t o allo w by-pas s o f th e fuel ga s syste mor

proces s durin g thes e periods ! Thes e provision s specif y th e condition s tha t

mus t b e me t durin g thes e by-pas s period s t o minimiz e emissions
. Simila r

provision s are no t bein g propose dfo

r transfe r operation s becaus e i t i s no t believe dt o b e . necessary . Loadin g operation s can normall y be : postpone dunti l th e process , o r fue l ga s syste mi s operationa l again
. Th e propose damendment s t o subpar t H consis t o f additio n o f

adefinitio n o

f "rout e t o aprocess " an dchange s t o th e contro l option s for

pumps , compressors , etc
. Th e definitio n o f

"rout e t o a process " incorporate s th e ke y concept s use di n subpar t

Gprovision s fo

r storag e vessel s ari dtransfe r

operations
. N o . provision s hav e bee n include di n th e - propose damendment s t o subpar t H to
. allo w by-pas s durin g period s o f maintenanc e o r repai r of th e proces s o r fuel ga s system
. Th e EPA doe s no t believ e tha t

paralle l provision s ar e neede dfo r equipmen t

leaks
. 2
. Lowe r Boun dConcentratio n Performanc e Standar d Th e EP A i s proposin g t o ad dan alternativ e performanc e standar dlimi t
. o f 20 part s pe r

millio n b y volum e concentratio n limi t

fo r noncombustip n •

„ - contro l device s use dto-comply-with.the
. proces s vent , .storag e vessel, ; aad^u<i--'k wastewate r

provision s i n subpar t

Gand } th e equipmen t

lea k prbyisipn s bf

b V>
. subpar t H

- Thi s optio n woul db e i n ;;' ? additio n t o m e presen t

performanc e <,-

' standar do

f 9 8 o r 9 5 percent.remova l of

, tota l VQ C o r HAP , respectively , i n thes e section s o f th e rule
. Thi s lowe r

hound , ..' • concentratio n standar di s bein g added > t o thos e section s of

th e rul e wher e EP

A believe s ther e woul dno t

normall y b e significant amount s o

f dilutio n ai r

an d• an y attempt s ,t

o circumven t

coul dbe ; .detected
. Th e EP

A i s proposing:this \ chang e t o th e rul e t o provid e alower : .;,- • boun dconcentratio n leve l for us e i n cos t effective.desig n of

contro l device s an drecovery'device s suc ha s carbo n .-.'

- adsorber s an dcondensers
. Thi s lower

boun dconcentration , performanc e standar di s propose dt o b e adde dt o th e rul e t o reflec t actua l • performanc e o f

these , contro l device s an dt o make th e rule' s requirement s • consisten t wit hth e underlyin g cos t an d emissio n analyse s fo

r thi s rule
. Mos t recover y device s (e.g. , condensers , adsorbers , etc. ) are designe dt o achiev e aspecifi c outlet

concentratio n fo

r a rnaximu mloadin g scenariofo r astrea m wit hspecifi c characteristics;/Th e .- . specifi c outle t

concentratio n of

agiven; ; syste mis.a.functio n of

th e equilibriu m an dkineti c limit s fo

r th e technolog y an dth e characteristic s of.th e ga s stream
. and'th e cos t

o f th e system.
. Fo r

an y . . give n design , thes e device s wil l ' typicall y reduc e emission s t o th e sam e concentratio n leve l over

arelativel y wid e rang e o

f inle t concentrations
. Thus , whe n th e inle t

concentratio n i s ;J ' ; substantiall y belo w th e desig n maximu mloadin g conditions , (an d- • . begin s t o approac hth e residua l leve l i n th e outle t stream ) th e recovery , devic e " efficienc y wil l decrease;--When.thi s •;> ' ^ occur s th e outle t

concentratior i i s the;-; • t sam e orlpwe r

tha n th e outletq'r:; **&<?• : concentratio n durin g maximu mloadin g coriditions.Th e cos t

an demissio n :. r contro l estimate s use di n developmen t - o f thi s rul e wer e base don;maximimi : ; w desig n loadin g conditions.an ddi dno t s -ci reflec t operation s ove r

th e full.rahg e of 5 poteritia l operatin g condition s fo r th e . . SOCM I industry
. Therefore , i t

i s .. . necessary t o specif

y alowe r boun d concentratio n performanc e leve l i n

additio n t o th e remova l efficienc y i n th e rul e t o ensur e fia t

thi s rul e i s implemente da s intended
. Wher e EP A considere dth e us e o

f thi s alternativ e t o b e appropriate , th e propose d amendment s woul dad dprovision s t o specifi c section s t o allo w us e o f th e 2 0 pp mstandard
. - Thi s additio n o

f alowe r boun d concentratio n limit-t o th e performanc e standar dwil l als o encourag e us e of
. -. . ."'•' device s tha t

recove r and'allow
. fo r

reus e , : 5 of material s an dwil l remov e a n ^inequity '• * between.requirement s for

- differen t types
. o f contro l equipment
. Wit hthi s '?..;h}.: additioria l contro l alternative , th e fequireriienrii-for
. proces s vents , stprage>< / ivessels , vapo r

contro l device s applie dt o certai n wast e managemen t units,

- an d..--•-

> equipmen t

leak s wil l b e consistent " wit h th e requirement s for

transfe r racks
. . .

. Thi s lowe r

boun dconcentratio n standar di s no t

bein g allowe da s a n optio n fo r complianc e wit hth e enclose d-.- . proces s uni t

alterriativ e i n § 63,17 2 o f
. subpart H o r wit hth e contro l ''• .'" :•'."
. requirement s fo

r surface'impoundirieht s subjec t t o §63.13 4 o

f subpar t G
. Th e us e of thi s lowe r

boun dconcentratio n limi t ; i s considere dinappropriate.i n thos e situation s becaus e of

th e larg e volume s o f dilutio n ai r

involved
. 3
. Recapture Device s Th e EP A i s proposin g t o revis e th e •'. rul e t o clarif

y th e requirement s fo

r equipmen t

suc ha s adsorbers , condensers , an dscrubber s tha t ar e use d; t o recove r material s (bu t

no t primaril y fo r use , reuse , o r

sale) , an dar e use dt o mee t th e contro l requirements
. Th e propose damendment s introduc e ane w terrh , "recaptur e device" , t o identif y thes e devices , which.captur e emission s an dthe n sendith e materia l for ultimat e

. disposal , revis e th e definitio n o f contro l , devic e t o includ e thi s concept , an d revis e .variou s section s o f th e rul e t o refe r t o recaptur e devices
. Currently , th e rul e allow s th e us e of

contro l device s an drecovery device s an dspecifie s th e applicabl e monitorin g an d recordkeepin g requirement s b y typ e of equipmen t

(e.g. ; adsorbers , etc.).
. : :v< - .-. ' : However , th e rul e dbe s no t indicat e ho w '• t o trea t anon-combustiori devic e tha t is : no t use da s arecovery devic e (a s ? defihedirithe'rule).v ; v./ ; : • '
. ' - ' ; Th e EP

A is.prpposiri g t o revis e ti e v :

, rulei n thi s manne r

i n order , t o address; : • th e regulatory voi dfo

r non-combustion /
• norirrecbyer

y device s while-preserving
. . th e approac huse dhi'thi s rul e (and>* : ' ;• .earlie r rules ) t o differentiat e betwee n ; ^ ; proces s ari dcontro l i n thi s industry
. ;> . Th e existin g definition s i n th e rul e fo r • recovery devic e an dcontro l devic e

, reflec t th e regulatory approac huse din :

## ymmm P. 9

^^^^^PP^^P^^^^^^^^^% 5 : ^^i'^^' 5^f^^' ;:i '" ^ -- :; '^ ; '^" : ; • ! ; : V:^'S'^^'-V;^S-^- f ^v * - :"<:^?-^;

p ^'.-
. '---^^r^jya^t^is^ ^ -;^^F6der^l!:Registe r/ Vol i 61 , No
. 16 6 /

Monday , Augus t

26 , 199 6 /

Propose dRule s 4370 5 th e NSP S standard s fo

r proces s vent s associate dwit hdistillatio n operations , . ai r oxidatio n reactors, an dothe r reactors
. Unde r

thi s approach , equipmen t

i s considere dt o b e part

o f th e process , if

th e recovere dmaterial s ar e used , reused , o r

sold
. Th e NSP S standard s fo

r proces s vent s an dth e HON proces s ven t

provision s treate dal l condensers , adsorbers , scrubber s a s "recover y devices' ! an dneve r considere dsituation s wher e thi s * eqUipmeritppul db e tise dt o .capture th e emission s ^d;the n send-th e materia l fo r ultimat e fiisposall SiriCethes e use s o f - 3 mesetypesoFequipriien t d o occu r an d th e apprbachMse dt o di$tinguish' ' betwee n proces s an dcontrol'Wa s a n integra l par t

of th e dat aanalysi s Usedt o suppor t thi s rule,-th e EP

A conclude d tha t th e bes t approac hwoul db e t o defin e dne w ter mt o identif y thi s , additiona l category of

equipmen t

an dt o explicitl y identif

y thi s equipmen t

an d th e monitorin g reqUirementsi n th e rule
. 4
. Industria l EUrnaces.:',..'..
. I n today'sariiendments , th e EP A i s proposiri g t o includ e RCRA-regulate d industrial-furnace s unde r th e HON' s provision s forhoilers
. Thi s chang e i s . . bein g propose dbecaus e industria l furnaces , lik e othe r

RCRA-regulate d combustio n devices , ar e subjec t t o ^ RCR A requirement s whic haccomplis h the.sam e purpos e a s som e HO N provisions
. Fo r

example , owner s an d operator s are ; alread y require dt o demonstrat e tha t

industria l furnace s ar e capabl e of

achievin g th e RCRA-require d destructio n and.remova l efficiency
. A secon dperformanc e tes t

unde r th e HO N i s no t considere dnecessary . By amendin g th e definitio n o f "boiler " t o includ e industria l furnaces , th e rul e woul dtrea t

industria l furnace s similarl y t o othe r RCRA-regulate dcombustion ' devices
. Th e EP A ha s chose n t o includ e industria l furnace s withi n an existin g HON definition , th e definitio n o f "boiler" , rathe r

tha n creatin g separat e regulator y provision s fo

r industria l furnace s throughou t

subpart s F , Gan d H
. Thi s decisio n i s base do n adesir e t o avoi dmakin g di e HO N longer an dmor e complex
. Th e EPA-recognize s tha t som e confusio n ma y result fromcalling thes e device s "boilers " ir i th e HON , whe n the y ar e know n a s "industria l furnaces " unde r RCRA : However ; thi s potentia l i s small , an dca n b e manage dthroug h appropriat e definitions
. . . Th e EP A considere dseveral, ; alternative s tofusin g th e definitio n o f , "boilers " t o addres s industria l furnaces ; Al l thes e alternative s presente dmor e . seriou s difficultie s tha n -using th e term "boilers." : Fo r

example , excep t

fo r on e instanc e i n th e wastewate r provision s o

f subpart G(a n erro r whic hi s bein g correcte db y thes e amendments) , th e HO N doe s no t

us e th e term"industria l furnace. " In orde r

t o us e that

term consistently , i t

woul dhav e t o b e adde d to multipl e location s throughou t thre e subparts , an dane w definitio n woul d probabl y b e needed
. I n contrast , th e provision s fo

r "boilers " ar e alread y appropriat e fo

r industria l furnaces
. Thus , th e desire dresul t

can b e .•• " accomplishe dwit hles s revision o f th e regu}atbr y text
. -.- , Th e EP A als o considere dth e optio n o f callin g thes e device s "incinerators" , becaus e man y industria l furnace s more closel y resembl e incinerator s tha n boilers,-i.e. , the y combustorgani c HAP ' withou t producin g steam
. However , i n thi s cas e ther e woul dstil l b e confusio n becaus e RCR

A regulation s differentiate betwee n incinerator s an dindustria l furnaces
. Additionally , incinerator s an d industria l furnace s ar e regulate dUnde r .. . different subpart s o

f th e RCR A regulations
. Thi s woul dmake the ; HON' s cross-reference s t o RCR A regulation s extremel y complex , i f th e EP A attempte dt o addres s industria l furnace s i n th e existin g HO N provision s fo r incinerators
. In contrast , boiler s an d industria l furnace s ar e regulate di n th e same subpar t

o f th e RCR A regulation s (40 CF Rpar t 266 , subpar t

H) , s o tha t

th e existin g cross-reference s ma y b e use d withou t revision
. Afte

r balancin g al l thes e factorsfth e EP

A conclude dth e bes t approac hwoul db e t o includ e industria l furnace s withi n th e HO N definitio n o f

"boiler. " E. Mqnitoring/Recordkeeping/Reporting Provisions 1
. Correctio n t o Monitorin g Requirement s fo

r Aci dGa s Scrubber s . Th e EP A i s als o proposin g correction s t o th e requirement s fo

r continuou s monitorin g o

f ga s flo w enterin g a n aci d ga s scrubber
. I n case s wher e ascrubbe r i s use dafte

r acombustio n devic e fo

r halogenate dstreams , subpar t G currentl y require s tha t

aflo w mete r

with acontinuou s recorde r

b e installe dat

th e scrubber inle t t o measur e ga s flow
. Th e EP A ha s receive dne w informatio n tha t demonstrate s tha t

continuou s r monitoririgo f

thi s aci dga s streami s : impractica l du e t o th e hars hcondition s at th e scrubber

inlet
. A continuou s monitorin g devic e woul db e expecte dt o .hav e avery short

servic e lif

e du e t o th e combinatio n o f

hig htemperatur e an d
. corrosivity/lo w pH.Thus.i t woul dbe-•;

- extremel y costl y t o corhpl y wit hth e curren t requirement

fo r eontinuoiis
. monitorin g o

f ga s strea mflow
. Therefore , th e EP

A i s proposin g t o revis e §63.114(a)(4)(ii ) an d § 63.127(a)(4)(ii ) t o allo w thre e differen t • option s fo r determinin g ga s flow
. Eac h o f thes e option s woul dprovid e sufficient dat at o determin e aliquid/ga s (L/G ) rati o fo r us e i n monitorin g operatio n o

f th e aci dga s scrubber
. Th e first optio n bein g propose d woul dallo w owner s o r

operator s t o determin e ga s flow t o th e scrubbe r b y ' usin g th e desig n blowe r

capacity , wit h appropriat e adjustment s fo r pressur e ' drop
. Thi s woul dprovid e a"wors t case " gas flow
. I

f th e required complianc e demonstratio n showe dtha t ascrubbe r

coul dmee t

th e emissio n . reductio n requirement s of subpar t Gfor hydroge n halide s an dhalogen s durin g thes e worst-cas e flow conditions , th e ; EP A anticipate s tha t

complianc e woul d als o b e achieve ddurin g condition s o f lowe r ga s flow
. I n th e secon dpropose doption , th e • EPA recognize s tha t

som e post
combustio n scrubbers , regulate dunde r RCRA, are alread y require dt o determin e aL/ Grati o t o demonstrat e complianc e wit hemissio n reductio n requirements
. Th e EP A i s proposin g tha t

method s o

f determinin g ga s flo w whic hhav e bee n utilize dt o compl y wit hpre-existin g RCR A regulation s shoul dals o b e acceptabl e fo

r purpose s o

f subpar t G
. Thi s propose doptio n als o provide s tha t adeterminatio n mad e before th e complianc e dat e fo

r thi s rul e may b e use di n th e complianc e demonstratio n i f i t i s stil l representative
. Finally , th e EP

A i s proposin g tha t owner s o r operator s ma

y develo p aga s flow determinatio n plan
. Th e pla n woul dspecif

y areliabl e metho dfo

r determinin g ga s strea mflow , t o provid e arepresentativ e o r

at leas t aworst-cas e flo w rat e durin g representativ e operatin g conditions
. Recordkeepin g . requirement s woul dapply
. Th e EP A believe s tha t

thi s performance-oriente d optio n i s necessary du e t o th e wid e variety o f technologie s an dproces s configuration s i n existence
. Fo r example , man y SOCM

I combustio n unit s utiliz e multipl e scrubber s i n series
. Thi s may requir e adifferen t approac ht o determinin g ga s flow , tha n -

. whe n asingl e scrubbe r

i s used.

- • 2
. Implementatio n : Plan s Withtoday's,propose damendments , : EP A isproposiri g t o remov e th e requirement

fo r submitta l of implementatio n plan s fo

r existin g sources-emissio n point s tha t ar e no t : include di n a n emission s average . ' Unde r th e Apri l 22,1994 , rule , owners, . o r operators , wh o hav e no t

ye t submitte da n operatin g permi t "' • ' ' applicatio n wit hth e informatio n . specifie di n § 63.152(e) , wer e require d-P.1 0



### 4370 6 Federal Registe r / Vol
. 61 , No
. 16

6 / Monday , Augus t

26; f y:^S^i^:^ !

t o submi t b y Apri l 22,1996 , an implementatio n pla n fo

r point s no t include di n a n emission s average . O n Februar y 29 , 199 6 (6 1 F

R7716) , thi s dat e wa s revise dt o Decembe r 31,1996 , t o allo w tim e fo

r owner s o r

operator s o

f source s t o conside r

recen t change s t o th e rul e an dt o allo w fo

r expecte d furthe r revision s t o th e rule
. Thi s chang e i s bein g propose d becaus e i t

n o longe r

appear s tha t

thi s repor t woul dserv e ausefu l function , an dth e implementatio n pla n fo r point s no t include di n a n emissio n averag e represent s aduplicativ e an d unnecessar y burde n wit hth e Notificatio n o f

Complianc e Status
. B y Decembe r

3i , 1996 , many , i f

no t most , source s wil l hav e alread y submitte dth e informatio n covere db y th e . ; implementatio n pla n i n permi t applications
. An y remainin g source s wil l b e covere db y subsequen t permi t appHcations
. Thus, , th e implementatio n pla n requiremen t

i s redundan t

and , therefore , unnecessary . Furthermore , the ^ implementatio n pla n fo

r point s no t include di n a n emissio n averag e woul d no t hav e bee n subjec t

t o EP A approval
. Finally , eliminatin g th e implementatio n pla n requiremen t

woul dmak e th e HO

N consisten t

wit hlate r

MAC T standard s fo r th e sam e type s o f

emissio n point s whic hhav e no t

require dthi s report
. It shoul dno t

b e inferre dfromthi s proposa l t o eliminat e implementatio n plan s fo r point s no t

include di n an emission s averag e tha t

th e requiremen t fo r a n implementatio n pla n fo r point s include di n a n emissio n averag e wil l b e eliminated
. Thi s repor t

i s neede dt o ensur e tha t

apropose daverag e wil l mee t al l th e criteri ai n th e rul e ari dthat i t wil l resul t

i n credit s exceedin g th e debits
. Becaus e o

f th e complexitie s an d site-specifi c natur e o f

emission s . averaging , thi s report

wil l remai n subjec t t o EP A approval
. • 3
. Startup/Shutdown/Malfunctio n Plan s Th e EP A i s proposin g to
. revis e several section s i n th e rul e t o clarif y th e requirement s fo

r start-up/shutdown /

• malfunctio n periods.Thes e ••;',
. clarification s includ e revision s t o th e definition s o f

"start-up". and "shutdown"

an drevisions t o the , .monitorin g an drecordkeepin g requirement s i n § 63.15 2 o f subpar t G
. Thes e change s ar e bein g proposed't o addres s severa l Oversightsi n th e ' , ! '
. origina l draftin g an dt o mak e th e requirement s fo

r start-ups/shutdowns / malfunction s mor e explici t t o avoi d.' ; potentia l misunderstandin g o f th e '•'••'•• * requirements.
. : •-,'.''. ' -'•'••'. ;.|?;•:;
. Revision s ar e bein g propose dt o th e ."'
. definition s fo

r th e term s "start-up"

an d "shutdown"

t o mak e thes e term s mor e consisten t an dt o exten dthes e term s t o '
. includ e part

o f acmp u (suc ha s a wastewate r

tank ) a s wel l a s m e entir e unit
. Th e presen t

definition s als o d o no t : appl y t o contro l equipmen t use dt o compl y wit hth e rul e o r

t o wast e managemen t

units
. ThUs , i f

ther e wer e astart-up/shutdown/malfunctio n of a n individua l ite mo

f equipmen t

o r a n ite m o f equipmen t

no t presentl y include di n •

' m e definition , i t

woul dno t

b e - permissibl e fo

r th e owne r

o r operato r t o follo w th e start-up/shutdbwri / ; • ;-;^: y •'••"; malfunctio n pla n becaus e i t wduld-ho t

V ; apply.'Sinc e i t

wa s intendedthattheI' ; start-up/shutdowh/malfimctiohplan•;:. v ; woul db e followe di n suc hsituations , th e definition s ar e bein g revise dt o reflec t thi s intent
. Th e definitio n o f '"'" • "start-up " i s als o bein g revisedt o • . includ e activities associate dwit hinitia l start-Up , testin g o

f equipment , an d
... ' transitiona l condition s du e t o change s i n produc t

fo r flexibl e operatio n units
. / Th e curren t

definitio n fo

r "start-up" , erroneousl y exclude s thes e activitie s . 1
. whic hshoul db e addresse dunde r the- : start-up/shutdown/malfunctipr i plan
. Th e propose drevisions correc t thes e . draftin g errors . A s part

of th e correctio n t o th e definition s fo

r "start-up " and
. " "shutdown, " EP

A i s als o proposin g t o ad dtw o paragraph s to § 63.102(a ) t o clarif y operationa l requirement s durin g period s o f start-up/shutdown / malfunction
. Thes e provision s ar e necessary t o avoi dmisus e o f th e revise d definitio n o

f th e term"shutdown. " Revision s are bein g propose dfor severa l paragraph s i n §63.15 2 t o clarif y tha t monitorin g i s no t

require ddurin g period s whe n th e sourc e i s no t operatin g an dtha t

th e start-up /

• shutdown/malfunctio n pla n detail s th e monitorin g requirement s durin g period s whe n th e pla n i s applicable

- Currently ; th e rul e doe s no t

explicitl y addres s monitorin g requirement s durin g period s whe n th e sourc e i s riot

operating
. • -. . Becaus e o f concern s tha t

thi s absenc e o

f directio n coul db e interprete da s requirin g monitorin g afte

r shutdow n o f asource , clarifyin g languag e i s bein g propose dt o remov e an y potentia l fo r misinterpretation
. Mino r

re visions , ar e •

, v ; propose dt o § 63.152 , paragraphs,(c ) and < •(f ) t o clarify.thatdat arecorde dduring;:;.
. ; , .periods'of-start i up/shutdo\^:^^--'-.v-'.;v;
. malfunctio n ar e no t

excursion s an dar e ; Ho t t o b e include di n average s o f y : ,. . monitorin g data
. Thes e change s ar e v ; > '•• •. - > bein g mad e t o ensur e tha t i t i s clea r tha t durin g periods.o f

start-up/shutdown/, : -• ; -f malfunctio n th e sourc e i s require dt o • : follo w th e procedure s i n th e startrup/:;;
. shutdown/malfunctio n pla n i n lie u o f ••.. requirement s that

woul dotherwis e •-':•' : appl y t o ;the affecte demissio n point s

unde r subpart G
. 4
. Alternativ e recordkeepin g provision s Today' s propose dchange s t o th e rul e includ e additio n o

f ne w provision s t o allo w us e o

f a n alternativ e recordkeepin g syste mtha t record s fewer dat apoint s durin g period s o f routin e complianc e provide dth e syste mmeet s specifie dcriteri aan dth e syste mi s : verifie dannuall y t o mee t th e . , requirements
. The.propose dprovision s ,wpuid'prpyid e a n alternative;t o the;

- 7
. , , existin g provision s i n § 63.152(f ) fo r ; '.; ' dat acompressio n systems
. Thes e new. , provision s ar e expecte dt o reduc e '.-'.••.'• • recordkeepin g burde n fo

r som e . ..facilities-.••*'-.-v, ' •:' • ..'.;-^.-'.••'•..'.' • '..!> • Th e propose dalternativ e , recordkeeping provision s allo w a n . - . • : owne r o r operato r t o us e a n exception

onl y recordin g syste mprovide dth e syste mmeet s specifie dcriteri aan dth e syste mi s demonstrate dt o operat e properl y initially , annually , an do n - demand
. Th e ne w provision s requir e ma t the:monitorin g syste mb e abl e to : (1 ) Detec t abnonria l o r

"impossible

- V
. dat a(e.g. , temperatur e readin g o f :-200° C o n aboiler) , (2) detec t inappropriat e "flat-line " data , (3 ) alarm a t aset-poin t

tha t i s relate dt o alimi t

o n aparamete r

range , (4) generat e a runnin g dail y averag e tha t coul db e use db y plan t

personne l o

r t o satisf y a n inspecto r tha t th e syste mi s operatin g an dth e paramete r

i s withi n establishe d limits , an d(5 ) allo w asyste mchec k o n deman ddurin g norma l operation s t o verif y tha t th e syste mi s recordin g dat a. properly
. A descriptio n o f th e monitorin g system , an dth e mos t recen t supersede ddescription , mus t be
. retained
. Th e curren t

descriptio n woul d b e retaine da t

leas t 5 year s an dlonger , i f i t ha s no t hee n superseded
. I t

mus t b e retaine deithe r

on-sit e o r b y ametho d- tha t allow s acces s withi n tw o hour s afte r arequest. Th e mos t

recen t supersede ddescriptio n woul db e retaine dfo

r at leas t 5 year s fromit s

. creation bu t

coul db e store doff-sit

e i f i t i s mor e tha n si x month s old
. I f th e supersede dversio n i s alread y mor e tha n 5 year s bld:(atth e time i t

become s ' ; - superseded);i t

mayb e discarde d immediately:.Th e facilitywoul dselect
. : th e specifi c Jevelsio r

th e alar mset;.:
. poihts.consideringth e variabiht y of.the
. i proces s operation s an dth e control : : . deviC e stabihtyimde r

different operatin g conditions
. It

i s expecte dtha t

. thesealarinsetpoiritswbuldbe..': , establishe dfaf

aleve l suc htha t

j : Cdrrective^ctio n coul db e taker t t o preveritoccufreric e o

f aparamete r

: • excursionJ-Th e alternativ e provision s "

- allo w th e owne r

or operato r t o retai n •

•P.1 1 Monday , Augus t

26 , 199 6 /

Propose dRule s 

### 4370 7 only.me'daily;aveiage.:Valu e unde r mos t circumstances
. If

n o excursion s occu r

i n aperio dof

6 consecutiv e months , th e owne r o r operato r is
. no t require dt o recor dth e dail y average , bu t mus t recor dan dretai n weekl y a t leas t on e paramete r

valu e durin g aperio do

f operatio n othe r

tha n astart-up , shutdown , o r

malfunction
. I

f anon excuse dexcursio n occurs , th e owne r or operato r mus t immediatel y resum e retainin g th e dail y averag e valu e fo r eac hday
. A n owne r

or operato r electin g . t o us e thi s alternatiye^i s require dt o .Votify'-EPA''m'i£e:r^'6tification.-6f Complianc e Statu s o r

periodi c repor t wit h'updates ' ^whenever

ther e i s a charigeirilthe^frtquenc y o f dat a retention
. ';^;--^;- ; ; - .'
. .^e > propdse'd''alfer^ativesystem''i h § 63:152(g ) differ s fro

mth e alternativ e systemfp r

dat acorripressio n system s provide di n § 63.152(f

) an dth e existin g continuou s monitorin g requirements i n tha t th e § 63.152(g ) alternativ e base s complianc e p n demonstratio n o f a syste man drecord s fo

r period s o f abnorma l operation ; Th e EP A believe s tha t thi s alternativ e provide s a n opportunit y to'use curren t technolog y t o reduc e th e cos t

p f monitorin g an d complianc e demonstration
. It
. i s als o anticipate dtha t

facilitie s electin g t o us e thes e provision s wil l hav e bette r emissio n contro l tha n facilitie s no t usin g a n earl y warning.typ e system
. Becaus e th e syste mha s t o pas s a n initial , annual , an do n deman d performanc e demonstration , EP A believe s tha t

ther e ar e sufficient safeguard s t o ensur e th e syste mi s operate dproperly. ^ 5
. Miscellaneou s Clarifyin g Edit s t o Recordkeepin g Requirements , Th e propose damendment s t o th e rul e includ e severa l othe r

revision s t o reduc e th e recordkeepin g burde n o f th e rul e i n additio n t o thos e describe dabove
. First , th e propose damendment s includ e an additiona l alternativ e fo

r cmpu s tha t

d o no t us e a s areactant r

o r make a s a product , an y o

f th e brgarii c HAP' s liste d i n tabl e 2 of

subpar t F
. Paralle l change s ar e als o bein g propose dfo r similar documentatio n requirement s i n subpar t I
. Th e ne w provisions.-whic hwoul db e adde dt o § 63.103(e ) aiid j 63.192(k) , woul dallo w a n owner , o r operato r t o documen t

th e inapplicabilit y ofth e rul e o n th e reques t

of a n inspector
. Thi s alternativ e i s bein g provide dbecaus e i t wa s neve r

EPA' s inten t

t o impos e an

. ongoin g recordkeepin g requireinent o n source s no t

subjec t t o th e rul e and
. becaus e th e curren t

provision s can b e interprete dt o impos e suc ha requirement
. . EP A propose s t o revis e § 63.103(c ) t o remov e th e requiremen t

fo r a n owne r o r operato r t o maintai n copie s o

f report s i f th e report ha s bee n sen t

t o th e EP A Regiona l Office an dth e Stat e agency . I f th e EP A Regiona

l Office ha s waive dth e requiremen t

fo r submitta l o

f report s t o th e Region , th e owne r

o r operato r i s no t require dt o maintai n copie s o f th e reports
. Thi s revisio n i s bein g mad e du e t o concern that

misplacin g acop y o

f a report woul db e aviolation , eve n thoug hth e report

ha dbee n properl y submitted
. Thi s wa s riot

EPA' s intent
. \ I t i s also-propose dt o revis e § 63.103(c ) t o reduc e th e volum e of -, - records tha t

mus t b e store don-site
. - Concer n ha s bee n expresse dtha t on-sit e storag e i s often limite dan dmor e costl y tha n off-sit

e storage
. Subpart

F ; currentl y require s th e mos t

recen t 2 years ' record s t o b e store don-site
. Th e propose d• revisio n woul dspecif

y tha t a t leas t 6 months ' record s eithe r

b e store don-sit e o r b e availabl e withi n 2-hour s b y an y means . Th e remainin g 4 an done-hal f year s wortho

f records , may b e retaine d off-site
. A.definitio n o

f "on-site " woul d b e adde dt o clarif

y tha t th e record s ma

y b e kep t anywher e at

th e source , suc ha s acentral filing area . Thes e change s are^
. bein g mad e t o clarif

y wha t th e necessary record s are an dt o specif

y th e performanc e objective , an dno t th e method , tha t

mus t b e use dt o compl y withth e requirement
. Th e propose damendment s t o subpar t Finclud e revisions t o § 63.103(c)(2 ) documentatio n requirement s fo r period s o f start-up/shutdown/malfunction
. The
. propose dchange s woul dmak e thes e provision s consisten t

wit hth e requirement s i n subpar t

A (General Provisions ) t o documen t

an drepor t period s i n whic hexces s emission s occur . Anothe r

propose dcharige.to reduc e burde n an dsimplif y th e reportin g requirement s i s th e eliminatio n o

f th e differenc e i n submitta l date s fo

r report s sen t

b y U.S
. Mai l an db y othe r

deliver y services
. . . Thi s propose drevisio n t o § 63.103(d)(1 ) specifie s tha t

report s shal l b e submitte d or i or before-th e relevan t

date s an dth e provision s i n § 63.103(d)(l)(i ) an d(ii ) woul db e removed fromthe.rule
. Thi s chang e i s bein g mad e t o eliminat e a n unnecessary restriction
. • .. . ...-.-•-.-: . Th e propose damendment s include , revision s t o tabl e 3 o

f subpar t Ft o clarif y th e applicabilit y ofspecific;- , section s i n subpart

A t o subpar t

H
. ,-i Tabl e 3 t o subpart

Fcurrentl y doe s no t explicitl y detai l th e applicabilit y o f th e requirement s t o subpar t

H,.an dther e ar e som e incorrec t

reference s t o subpar t

A; ' • Th e propose drevisions t o th e tabl e correc t thes e errors . 6
. Miscellaneou s Change s t o Monitorin g Requirement s Th e EP A i s proposin g t o clarif

y th e - instrumen t

installation , calibration , operational , an dmaintenanc e requirement s that

occu r throughou t subpart Gfo r instrumenta l monitorin g , o f contro l devices
. Th e curren t rul e require s th e owne r

or operato r t o follo w th e instrumen t

manufacturer' s recommendation s fo

r installation , calibration , an dmaintenance
. Th e propose drevisio n woul dallo w th e owne r or operato r t o develop , awritte n procedur e tha t

provide s adequat e assuranc e that

th e equipmen t

woul d reasonabl y b e expecte dt o monito r • accurately
. Thi s revisio n i s being , , ' propose dbecaus e man y facilitie s i n th e SOCM I industr y d o no t

purchas e off

- ; . the-shel f monitorin g systems
. Instead , i t i s common.i n thi s industr y t o .develo p monitorin g system s fro

mequipmen t purchase dfro

msevera l suppliers
. Thus , i t i s likel y tha t

ther e ar e n o manufacturer' s instruction s fo r th e particular syste minstalled
. Eve n i n case s wher e amonitorin g syste mi s purchase dan duse dwithou t substantia l modification , th e environmen t i n whic h th e instrumen t

i s operatin g may diffe

r fro mth e manufacturer' s expecte d condition s sufficientl y t o mak e th e manufacturer' s recommendation s meaningles s o

r inappropriate
. Th e propose damendmen t

woul dprovid e • th e necessary flexibility whil e preservin g th e inten t

t o ensur e accurat e data
. Today' s propose damendment s als o clarif y tha t th e requiremen t

t o monito r regeneratio n stream"mas s flow " i n carbo n adsorber s mean s volumetri c flo w o f th e regeneratio n stream
. Thi s requiremen t

occur s i n severa l place s i n th e rul e (e.g. , 4 0 CF

R§ 63.114(b)(3))
. Th e languag e i n thes e section s i s bein g revise dbecaus e ther e i s concer n tha t th e wor d"mass " migh t

b e misinterprete da s prohibitin g existin g type s o f monitorin g tha t mee t th e inten t

o f th e requirement
. Th e purpos e o

f th e requiremen t

i s simpl y t o monito r

t o sho w tha t

th e carbo n bed s are bein g regenerate dan d maintaine dproperly
. Whil e ther e ar e system s tha t

provid e ameasur e of

the : mas s b y monitorin g several , parameter s an dconvertin g th e result s t o mass , thes e systems , a s wel l as . volumetri c flow 'meterin g system s al l star t wit h measurement s o

f volume
. Th e propose d amendment s replac e al l existin g reference s t o "mas s flow " wit h"mas s o r volumetri c flow. " Th e EP A i s als o proposin g t o amen d
. subpar t Gb y revising th e definitionof;'
. "flo w indicator " an db y revisin g th e v . regulatory language'specifyin g th eP.1 2
if&& * 4370 8 Federa l Registe r/ Vo l 61 , N o 16 6 /

Monday , Augus t26 , 199 6 /'Proposed'Rules " requiremen t

fo r monitorin g bypas s line s (e.g
. § 63.114(d)(1) ) t o b e consisten t

wit hth e provision s an d definition s i n subpar t

,H
. Th e propose d definitio n include s referenc e t o device s tha t detec t th e potentia l fo

r diversio n of astreamb y method s othe r tha n "flow " monitorin g an dth e by-pas s monitorin g requirement s n o longe r

refer exclusivel y t o th e presenc e o

f flo w o r impl y that
. flo w ha s t o b e measured
. Th e revise d definition s an drul e provision s allo w us e o f any , mean s tha t

wil l provide;an indicatio n o

f diversio n of

th e stream: fromth e contro l device
. , . 7
. Manua l Recordkeepin g Provision s Th e EP A i s requesting'commen t o n ! whethe r th e provision s i n § 63.151(g)(3 ) fo r manua l recordkeepin g system s shoul db e revise dt o allo w request s fo r approva l o

f monitorin g o n ales s frequen t basi s tha n onc e every 1 5 minutes
. Th e EP

A ha s receive drequest s tha t thi s provisio n allo w monitorin g onc e pe r 8-hou r shif t (o r les s frequently ) if th e owne r

or operato r ca n demonstrat e tha t

operatin g parameters : fo r th e contro l devic e d o no t vary significantl y over

time
. Example s o

f system s tha t

th e requesto r

believe d shoul drequir e onl y limite dmonitorin g includ e condenser s an daci dga s scrubber s tha t

vary slowl y over

time
. Th e requesto r

believe dtha t

th e presen t rul e requirement s impos e asignifican t burde n o n facilitie s withou t automate d recordin g system s sinc e plan t personne l woul dhav e t o expen dconsiderabl e tim e recordin g data
. I n previou s decision s o n request s fo r alternativ e monitorin g system s fo r standard s establishe dunde r 4 0 CF R part s 6 0 an d61 , EP

A ha s sometime s allowe dless " frequent

monitorin g base d
. o n consideratio n of

th e leve l o

f th e actua l emission s i n relatio n t o th e standar dan dth e contro l technolog y stability
. Thes e reviews-hav e considere d th e proces s operatin g characteristic s an d th e natur e o

f th e type s o

f control : • ' problem s tha t

coul doccur . I n situation s wher e i t i s extremel y unlikel y tha t a,. : significan t

emissio n even t

coul dgo undetected , les s frequen t monitoring : . . ha s bee n allowed
. I

f EP A wer e t o revis e subpar t Gt o allo w les s frequent ..:,;. . monitorin g for

facilities;with ; manual, > - - recordkeepin g systems , i t i s likel y that..
. th e provision s wouldrequir e tha t th e v ; emissio n poin t

b e operate dat. alevel.'.•-.:f ? substantiall y belo w th e leve l o f th e •..-•-. :~ . standar d(e.g. , aTR

E greate r tha n 4 , a9 9 percen t reductio n whe n th e rul e : j
.- require s a9 5 percen t

reduction^o r

a;>•:;; ; substantiall y lowe r

emissio n rat e tha n allowed) , an dit s availabilit y woul db e limite dt o certai n contro l technologies
. Monitorin g les s frequentl y tha n onc e pe r hou r migh t b e appropriat e fo

r carbo n adsorber s an dsom e absorber s bu t les s frequent

monitorin g woul dno t b e appropriat e fo

r equipmen t

suc ha s , condensers
. Adsorber s ten dt o exhibi t failur e over

arelativel y lon g perio dof tim e whil e condenser s can fai l quickl y if acompresso r

fail s or if flo w rate s throug hth e condense r

ar e increase d significantly
. Monitorin g acondenser : onc e aday coul dpermi t

asignifican t undetecte demission s episode
. Th e EP A i s no t currentl y proposin g areduce d.-< ; ,?

- '• ? frequency o

f rnbriitoring
. However , the^ ; EP A request s commen t

oil
. th e nee dfo r areduced frequency a s well.a s th e . > f ; > appropriat e criteri afo

r allowin g th e use o f les s frequen t

monitorin g (sucha s : /

u onc e pe r shift ) an dth e basisfo r

the, ':~f~. ;'-;: recommende dcriteria
. F.Overlapwith Other

Regulations V f

, 1
. Benzen e Waste NESHA P \. ; Th e Apri l 22,199 4 rul e require s tha t source s wit hwastewate r

stream s subjec t t o contro l requireirient s i n th e HON ari d Benzen e Waste NESHA

P (4 0 CF Rpart ff: 61 , subpart

FF ) compl y wit hbot hrules
. Sinc e Apri l 1994 , member s of th e regulate dcommunity hav e objecte dtha t thi s requiremen t

unnecessaril y " increase s th e cos t

o f demonstratin g ,

' complianc e an dcomplicate s managemen t

of environmenta l program s at afacilit y withou t providin g a'
. correspondin g environmenta l benefit
. T o addres s these,concerns , EP A i s proposin g to ad dacomplianc e optio n t o § 63.110(e)(1 ) thatwoul dallo w some consolidatio n o

f th e inspection , monitoring , recordkeeping , an d reportin g requirement s o

f thes e tw o • NESHAP
. Th e propose darhendment s would , allo w a n Owne

r o r operato r t o us e the ' wastewate r

provision s o

f thi s rul e a s complianc e withth e provision s o f th e •• ' Benzen e Waste NESHA

P provide dtw o • condition s are me t

First , th e owne r

o r operato r mus t compl y wit hth e wastewate r

provision s of

subpar t G
. Second , fo

r an y Group 2 wastewate r

o r ; organi c streamwhos e benzen e '*•• emission s ar e subjec t

t o contro l unde r

• ; ; th e provision s o

f th e Benzen e Waste ' ' NESHAP , th e owne r

o r operato r wil l ••;.-• ; compl y wit h-th

e -requirements : forGroup "
• 1 wastewate r

stream s i n subpar t

Gfbr*' i ; tha t stream
. Thi s propose dadditiona l complianc e optio n i s designe dt o :;• : maintai n th e applicability an d stringenc y o

f existin g contro l <;

- requirement s fo

r th e Benzen e Waste' * - ' NESHA P whil e providin g an" V ''•• ::; ^ opportunit y t o reduc e th e complexit y o f th e complianc e demonstratio n b y '•••'• reducin g th e numbe r

o f separat e rule s : ihatappl y t o th e equipment
. Th e " " numbe r o f stream s tha t

ar e subjec t

t o contro l unde r

th e Benzen e Wast e NESHA P woul dno t

b e change db y electin g t o us e thi s option
. Th e EP A wishe s t o emphasiz e tha t

thi s additiona l complianc e optio n woul dno t supersed e an y existing , still-effectiv e agreement s t o take mitigatin g action s tha t wer e grante di n exchang e fo

r additiona l
. complianc e tim e wit hth e Benzen e Waste NESHAP
. Thes e agreement s woul dno t

h e altere db y thi s propose d arneridmenM o thi s rule.,•-•-. ? •;•'-.•<?•'•;: < v-.;'...:
. : 'i2'.''Resbur^!G^nseryati6h'Bn^Recbvejry ' ;^(RGf^; ; ^;.;;; : .^v;- : . '.•;;'.;;:."•: • ; IndevelbpirigtheApri l 1994rule,.'

- EP A attempte dt o adoVess : th e proble m. • of 'Overlappin g requirernerits by ; specifyin g whic hprovision s appl y fo r each ' p f th e know n case s of

overlappin g ..- . rules , These " instruction s o n overlappini g requirement s wer e provide di n § 63.11 0 o f subpart Gan dir t §63.16 0 of

subpar t H

- Sinc e issuanc e o

f th e rule , EPA ha s learne dtha t

ther e i s anothe r

broa d
. categ6ry;o f

oyerlappingRCR A | , . .-.;,! ; requiremerit s that

wa s riot.addressedi n th e Apri l 199 4 rule
. In.today' s amendments , EP

A i s proposin g •. . provision s t o allo w us e of certai n RCRA

requ.ire dmphitbriri g t o satisf y correspondin g requirement s i n subpar t Gan dH
. Thes e propose dprovision s woul db e adde dt o thes e subpart s a s . § 63.110(h ) an d§ 63.172(n)
. Th e Apri l 199 4 rul e addresse dth e know n overlap s o

f contro l requirements , betwee n th e RCR

A rule s i n 4 0 CF

Rpart s 26 0 throug h27 2 an dth e wastewate r contro l requirement s of

thi s rule
. Du e t o anpversight , th e Apri l 199 4 rul e di driot specif y th e applicabl e requirement s i n case s where ; th e sam e contro l devic e . . (e:g. , incinerato r

o r adsorber ) i s subject , t o aRCR A rul e an dwoul db e use dt o compl y wit hrequirement s fo r nori

wastewater-provision s o f

thi s rule
. Presently , th e Apri l 199 4 rul e woul d requir e th e owne r

or operato r t o compl y wit hth e applicable.monitoring , recordkeeping , an dreportin g provision s of each : rule
. Complianc e wit hbot h rules ' monitoring , recordkeeping , ari d reportin g requirement s Woul d ; • " • ; significantl y increas e th e cos t o f ' ; compliance-demonstration s withou t -providin g acorrespq r enVfrnrimerita

l benefit : T o reduce thi s .^uiim^'ce.Kar^Vurdenifth

e EPA i s \ pfopbsmgto^allo w a n owne r of operato r t o electt b us e th e monitoring , recprdkeepirig ; an dreportirf g requifementsiri4bGFRparts 260 y. °'•"'•'• tjttbu^h^/^for'fhi s rule/? ' ' '•'•' '"• v-'"" iTh e EPAicorisider s thi s proppse d consblidatibt t

o f overlappin g -••:"•>•'• monitoring , recordkeeping , an d reportin g requirement s t o b e appropriat eP.1 3

1 * , ; ^^^7 : ' " / S;:^aW^*«iste r/ Vol . 61 , No . 16 6 /

I Regist e because,the,.RCR

A ai r rule s an dth e HO N hav e th e sam e objectiv e an d monito r simila r operationa l characteristic s of

contro l devices
. I n general , th e RCR

A requirement s ten dt o requir e mor e frequent

monitorin g an d retention O

f mor e detaile dinformation
. Therefore , i t

i s possibl e t o us e th e RCR A dat aan dreport s t o demonstrat e complianc e with/th e provision s of thi s rule
. Today' s amendment s als o propos e t o accep t demonstration s of

complianc e witiiRCR A requireriient s a s ; ; demonstration 1 ofcomplianc e wit hth e : pfocess.verit^trarisferoperatioris , storag e :;vessels , and/equipmen t

leak provision s of th e HON. ' The,wastewate r provision s i n subpart.G.presentl y exempt
hazardou s wast e incinerator s permitte d unde r 4 0 CF Rpar t 27 0 an dboiler s an d industria l furnace s permitte dunde r 4 0 CF Rpar t 26 6 fromperformanc e tes t requirement s of

§ 63.139
. Thes e RCR

A ai r rule s wer e judge dt o b e at leas t a s stringen t in.controllin g ai r

emission s a s thi s rul e s o tha t

asecon dcomplianc e derhonstratiq n wa s riot riecessairy. Thi s , judgmen t i s applicabl e t o th e contro l requirement s fo

r th e non-wast e wate r provision s o

f thi s rule
. Therefore , i t

i s propose dto
. ad dthes e rule s t o th e lis t o f control s exempte dfromperformanc e test s or othe r complianc e demonstratio n requireriientsi n §63.116(b) , § 63.128(c), , an d§ 63.139(d)(4 ) an dt o ad dprovision s t o § 63.120(d ) t o lis t

control s exemp t fro mcomplianc e demonstratio n requirements
. G. Proposed

Changes to Subparts H

and I I n additio n t o th e applicabl e change s discusse di n earlie r

section s o

f thi s preamble , th e prbposedchange s t o subpar t H consis t

of : (1 ) clarificatio n of th e term s "repaired " an d"firs t attemp t at repair " an dclarificatio n of th e • followup monitorin g requirement s fo r connector s an dvalves ; (2) correctio n o f § 63.180(b)(4 ) t o allo w us e of calibratio n gase s othe r

tha n methane ; an d(3 )
. miscellaneou s correction s an d clarification s t o th e wordin g of afe w paragraphs
. 1
. Clarificatio n o

f Definition s Th e EP A i s proposin g t o revis e th e definition s o f

th e term s "repaired " an d "firs t attemp t at repair." Thes e propose d change s aire, intende dt o eliminat e th e confusio n tha t

presentl y exist s regardin g wha t monitorin g i s require dafte r leak s ar e repaired. Th e definitio n o f "repaired " presentl y state s tha t th e > equipmen t

i s adjuste dor^otherwis e altere dt o eliminat e aleak. " Th e EP A ha s . receivedinquirie s whethe r thi s definitio n implie s tha t

ther e mus t

b e Monday , Augus t 26 , 199 6 /

Propose dRule s 4370 9 proo f b y monitorin g dat atha t

th e lea k wa s repaired
. Thes e question s hav e bee n raise dbecaus e othe r section s o

f subpart H impos e suc harequirement
. Becaus e o f inquirie s suc ha s these , EP A reviewe dsubpart

H an ddetermine dthat th e confusio n regardin g th e requiremen t wa s du e i n par

t to th e lac k

o f specificity i n th e definitio n o

f th e term s "repaired " an d"firs t attemp t a t repair. " Th e propose damendment s t o subpart H woul drevis e thes e definition s t o explicitl y includ e referenc e t o verificatio n monitorin g accordin g t o th e procedure s i n § 63.180(b ) an d(c) , a s appropriate
. Fro mthi s review , itwas

als o determine dtha t

sont e o f th e confusio n wa s arisin g frbrii lac k o f specifi c statemen t

i n applicabl e section s ofth e rul e tha t

verificatio n rrionitbrin g wa s required
. Th e propose dchange s t o subpar t H woul dcorrec t

thi s problem
. 2
. Followu p Monitorin g Th e EP A ha s receive dinquirie s regardin g th e requirement s fo r monitorin g withi n 3 month s afte r repai r : o f aleakin g valv e an dth e relationshi p betwee n thi s monitorin g an dth e periodi c monitorin g require db y th e standard
. Th e propose damendment s woul dad dprovision s t o § 63.168(f)(3 ) t o clarif y tha t (1 ) monitoringi s conducte d accordin g t o th e procedure s specifie di n § 63.18 0 (b ) an d(c ) an d(2 ) th e periodi c monitorin g ma

y b e use dt o satisf

y thi s requiremen t

if th e timin g of

thi s monitorin g coincide s wit hth e timin g specifie dfo

r th e followu p monitoring
. Th e ne w provision s tha t

woul db e adde dt o § 63.168(f)(3 ) woul dals o specif y ho w to conside r

th e result s o

f thi s monitorin g i n th e calculatio n of percen t leakin g valve s shoul dalea k b e detected
. Thes e propose dchange s woul drevis e th e rul e t o correc t oversight s i n th e original draftin g an dt o ensur e tha t

th e rul e reflect s EPA' s intent
. Th e EP A ha s als o receive dinquirie s regardin g whethe r

subpar t H require s followu p monitorin g o

f connector s foun dt o be.leaking
. Thes e question s hav e arise n du e t o alac k

of clarity i n § 63.17 4 (c)(l)(i ) an d(c)(1)(a) that thes e provision s appl y t o connector s tha t hav e bee n opened
. Th e propose dchang e t o th e rul e woul dclarif

y thi s point
. : 3
. Calibratio n Gase s Othe r Tha n *] Methan e Th e EP A i s proposin g t o revis e § 63.180(b)(4 ) t o allo w us e of calibratio n gase s othe r

tha n methane
. Sinc e Apri l
. 1994 , som e industr y representatives an d equipmen t

vendor s hav e expresse d concer n t o EP

A tha t presen t restriction t o us e methan e a s th e calibratio n ga s preclude s us e ofth e procedure s i n Metho d2 1 whic hpermi t calibratio n wit hanothe r

referenc e compound
. A s discusse di n th e Apri l 22,199 4 Federa l Register , EP

A intende dt o allo w th e us e o f referenc e compound s othe r tha n methan e i n th e calibratio n gases . However , du e t o adrafting

- erro r §63.180(b)(4)(ii ) wa s no t

modifie dt o allo w thi s flexibility
. Th e propose d amendment s t o thi s sectio n ofth e rul e woul drevis e thi s paragrap ht o allo w th e us e o f othe r compound s whe n th e instrumen t

doe s no t respon dt o methan e or doe s no t mee t th e performanc e . specification s p

f § 63.180(b)(2)(i)
. Th e EP A considere dwhethe r

thi s revisio n , shoul dinclud e arequiremen t t o adjus t th e instrumen t

reading s lo
. amethan e . bas e i n orde r

t o hav e th e reading s o n th e same basi s a s instrument s calibrate d
. usin g methane
. Th e propose d provision s d o no t

requir e suc ha n . adjustriien t

for th e sam e reason s give n i n th e Apri l 22,199 4 notic e fo r remova l ofth e 199 2 propose drule' s requiremen t o f adjustmen t

fo r respons e factor s (5 9 F R19447-19448)
. . . : Changes to Subpart

I Th e propose dchange s t o subpar t I consis t o f correction s of

severa l cross referencin g error s an drevision s t o th e general recordkeepin g an dreportin g requirement s i n § 63.190(f)
. Th e propose damendment s t o § 63.190(f ) ar e . th e sam e a s th e revisions t o § 63.103(c ) discusse di n sectio n III
. E
. . 5 o f thi s preamble
. IV
. Basi s for

Propose dChange s t o Wastewate r

Provision s A. General

Comments on Changes to Wastewater

Provisions Today th e Agenc y i s proposin g amendment s to th e wastewate r provision s i n subpart

Gtha t -ar e designe dt o clarif

y provision s o f

th e rul e that hav e bee n misunderstoo db y som e i n th e SOCMI industry
. I

f promulgated , th e propose dclarifyin g amendment s woul dno t

chang e th e basi c contro l requirements , predicte demissio n reductions, o r

cos t of th e rule
. A summary o

f th e amendment s i s provide dh i th e followin g paragraphs , Fou r section s hav e bee n rewritte n entirel y i n today' s amendment s t o improv e Clarit

y an dt o incorporat e the

ne w "poin t

of determination " concep t discusse di n sectionTV.Di of thi s preamble
. Th e four

section s address : - . criteri afo r determinin g th e Grou p 1 an d Group 2 wastewate r

stream s ( § 63.132) ; ; performanc e standard s fo r proces s wastewate r

( § 63.138) ; procedure s fo r . determinin g Grou p 1 an dGrou p 2
. ' wastewater.strearii s (§63.144) ; an d procedure s fo

r demonstratin gP.1 4 r-t i 

### 4371 0 Federa l Register / Vo l 61 , N

o 16 6 / Monday , Augus t

26 , 1996,,/^Ptoft6sedaRule s complianc e ( § 63.145)
. Also , requirement s allowin g th e us e o f floatin g flexibl e membran e cover s o n surfac e impoundment s hav e bee n adde d t o § 63.134 , an dasectio n addressin g in

proces s equipmen t

( § 63.149 ) ha s bee n added
. Mino r change s ar e propose dt o th e section s governin g wast e managemen t units , contro l devices , dela y o f repai r o f

. wast e managemen t

units , inspection s an dmonitoring , recordkeeping , and.»-.;, r reporting
. . - - - , - V ; •.;% ' f.vjjyjy..--

• ' As ; aresult,-today' s wastewater , provision s ar e bein g propose di n % - §§63.13 2 throug h63.147 , in" § 63.149 , i n table s 8'throug h20 , i n table s 3 4 throug h 37 , an di n figur e 1 o f

appendi x A t o subpar t G r Deletion s includ e §63.13 1 (reserve dsinc e informatio n becam e unnecessar y wit hamendments ) an dth e figure s an dtable s 14a , 14b , an d1 6 t o subpar t G
. Th e propose damendment s woul dadd- ane w tabl e 15 , whic h
. replace s table s 15 aan d15 b o f th e Apri l 199 4 rule , an dtable s 3 5 throug h3 7 an d figur e 1 , whic hprovide s akey-t o th e term s i n th e wastewate r equations
. Fractio n measure dvalue s (Fm)i n Tabl e 3 4 wer e correcte dfo r

fou r compounds : trichlorophenol , Fm=0.11 ; . chlorobenzene , Fm=1.00 ; isophorone , Fm=0.51 ; an d1,1,2-tricnloroethane , Fm=1.00
. I n addition , table s 11,12,17 , an d18.wer e revised
. B. Wastewater

Definitions 1
. Summar y o f

Significan t

Change s Significan t

change s propose dare : revision s t o th e "wastewater " definition ; replacemen t o f th e "poin t

o f generation " (POG ) definitio n wit h "poin t o f determination " (POD )
. definition ; additio n o f

"closed " an d "ope n biologica l treatmen t process " definitions ; additio n ofth e "enhance d biologica l treatmeri t

system " definition ; revision s t o th e "individua l drai n system " definition ; an ddeletio n of , definition s fo r

"tota l volatil e organi c hazardou s ai r

pollutan t

(VOHAP)",..
. "volatil e organi c concentration" , ari d "VOHA P concentration."
. ..... . Change s t o some,o f

the.definitipns,:...
. especiall y "wastewater" , "recovery; -hx
. device";:ahd:"pointofgerieratipn" , •;:. : wer e necessar y du e t o circularit y an da lac k o f specificit y i n th e definitibrisi.Th e definition s wer e revisedt o clarif y EPA' s interi t concernin g whic horgani c HAP* ' •. containin g water s arein-proCes s fluids} regulate db y th e provision s in'§:63.149' < an dwhic har e wastewate r an dregulate d b y th e provision s i n § 63:13 2 throug h'•--•• §63.147
. . ' '"• ' •" • 2
. Revise dWastewate r Definitio n Th e mos t

significan t

chang e propose d toda y t o th e "wastewater " ^definitio n i s th e additio n ofth e concep t o f "discard. " Th e discar dconcep t

i s fundamenta l i n distinguishin g whic hfluid s exitin g th e cmp u ar e subjec t

t o th e HO N wastewate r

provision s i n § § 63.13 2 • throug h'63.147
. Togethe r wit hth e poin t o f determinatio n an din-process
. *_., , equipmen t

concepts , th e revise d/
. - definitio n o f

wastewate r

make s ;•'*:•*.&-.,

_-•<•• . decision-making.for : facilitie s and xi\ ., ; , regulafory:authprities ; more —>:-;; A , : > c sfraightiprward , an dth e ^rulempr e , T n^l • > easil y implemented
. Sinc e fluid s i n th e in-proces s equipmen t

ar e als o ,. . ,,,', ; , r

v. . controlle db y th e HON , emissio n ; : reduction s wil l no t

b e affecte db y this; , propose dchange
. ;. , •.':.-.• \ : \'i:.-( •••••. 3
. Replace dPoin t

of Generatio n Wit h Poin t of Determinatio n Today' s proposa l woul dchang e th e definitio n fo r

-'poin t o f generation" , i n tw o ways^-on e wa y aconceptua l
. . • chang e an dth e othe r

achang e ir i
. . terminology
. "Poin t

o f generation " was > 'change dt o "poin t

of determination" : to ; distinguis hi t

fro mth e term , ''poin t

o f generation " a s use di n th e Benzene ; Wast e NESHAP
. "Poin t o f generation " wa s define di n th e Apri l 199 4 rule.a s : "th e locatio n wher e proces s wastewate r exit s th e proces s uni t

equipment, " (i.e
. exit s th e las t

recover y device)
. I n today' s proposal , i t

ha s bee n replace db y "poin t o f determination" , whic hi s define da s "eac hpoin t

wher e th e proces s wastewate r

exit s th e chemica l - manufacturin g proces s unit. " Theneed

fo r an dsignificanc e o f

thi s chang e i s discusse di n mor e detaili n sectior i IV.D
. o f thi s preamble
. 4
. Recover y Devic e Th e propose damendment s includ e a revise ddefinitio n o

f "recover y device. " The.propose ddefinitio n o f "recover y device " differ s fromth e existin g definitio n i n orde r

t o reflec t

th e revise d approac ht o th e definitio n of
. ' -.: ' "wastewater " ari dt o reflec t th e fac t tha t - deviation s fromnorma l operationsxl b occur . .. ; -•: . Uride r the:revise dapproac hfor;
. ~.:~'•<••• .• • definin g wastewater , astrea mdoe s not;.
. becom e wastewate r

unti l i t exit s th e las t recover y device
. A s arecover y devic e . ? ha dbee n define da s a n ite mo f J ;•.''. equipmen t

use dt o recove r

cheiriical s fo r fue l value , use , reuse , o r "sale" ; it : woul dsee mimpossibleT^y : : i , ; : y^; : defiriitidn^-t b sel l awastewate'r'strearii;
. o r residua l extrade dfrom awastewater : stream
. I n developin g th e revise d approac hfor

wastewater , i t

becam e ' v apparen t tha t usin g th e ter m"Sale " withou t an y qualificatio n i n th e definitio n o f

"recover y device " lef

t a potentia l loophole'
. A ba dacto r coul d "sell " a i Grou p 1 strea mt o a n affiliat e fo r anegligibl e amount , clai mtha t i t wa s asal e s o tha t

th e strea mha dno t

ye t exite dth e las t

recover y device , (s o i t

wa s no t wastewater) , an dth e affiliat e coul d simpl y dispos e o f

th e strea mo r

residua l withou t treatin g i t

i n accordanc e wit h
. th e HO N provision s (an dincurrin g th e costs;pj f suc htfeatment);;Th e additiona l

. languag e i s intende dt o remov e ;the : pbssibility;bfsuch-shamtjrajisactionsb y ^lMitih g th e concep t

o f safe s t o sale s fo r the'sarh e genera l purpose s fo r whic h (iernicals'rnayjb e recovere dand.; ; ^ utilize dwithin^th e HO N facilit y V / : (i:e.vuse, ; reuse; ; .6 r

burnin g a s fiiel)."Th e EP A helieyes^a t

suc hlanguag e i s ' '••'-• •broa denoug ht o encompas s any.sal e tha t is.no t asha msinc e "use " and

- "reuse " ar e ver y genera l concepts
. Th e definitio n als o differ s fromth e existin g definitio n ir i thatth e wor d"normally"
. np\ y modifie s th e phras e "use dfo r th e purpos e o f

recovering.... " Thi s chang e wa s made , t o recogniz e tha t occasiona l exceptions.t o normal.usag e ca n and.wil l arise
. .. . 5 : Adde dDefinition s fo r Close d

- Biologica l Treatrrient.Process , Ope n Biologica l Treatmen t

Process , an d Enhance dBiologica l Uni t Definition s fo r

close dbiologica l treatmen t

process , ope n biological. , treatmen t

process , an denhance d biologica l treatmen t

syste mwoul db e added.to : th e definition s i n subpar t G
. Th e ne w definition s ar e necessar y t o mak e distinctionsiamon g biologica l treatmen t

processe s whic hallo w th e incorporatio n o f

mor e flexibl e an dles s burdensom e compliance^demonstration s fo r som e facilities..Thi s i s discusse din '

. mor e detail.i n th e discussio n o f change s t o § 63.14 5 i n sectio n IV.F
. o f thi s preamble.
. 6
. Modifie dIndividua l Drai n Syste m Definitio n Th e definitio n for

individua l drai n systern_woul db e modified.t o clarify
. thre e keyjcqncepts'ari dincorporat e rmnp r ^wordin g changes
. Th e definitio n intbd^y's.proposa l woul dclarif y that
. pnl y istatioriar y system s ar e include di n th e definition ; ;tJiat,individua l drair i system s arejUsedtbiCpnye y residual s a s wel l as ^ wastewate r

streainsjvand,tha t

th e iridividual.drai n syste mdoe s no t '.-.. ' include ; in-proces s equipmen t a s describe di n §63.149.,.

-P.1 5

• & • I i Federa l Registe r/

Vol
. 61 , No
. 16 6 /

Monday , Augus t

26 , 199 6 /
. Propose dRule s 4371 1 7
. Deletio n o f

Tota l VOHAP , VO Concentration , an dVOHA P :Concentratio n Definition s Th e EP A propose s t o delet e th e definition s fo

r "tota l VOHAP" , "V O concentration" , an d"VOHA P concentration. " A s discusse di n sectio n IV.F.

- of
. thi s preamble , thes e term s woul dn o longe r

b e use di n th e rule ; therefore, , th e definitionswoul dno t b e needed
. C. Changes;to §63.l3X

.''•".' h i the- 1 Apri l 199 4 rul e an di n today' s propose dchange s t o th e rule , § 63.13 2 provide s th e instruction s o n howt o •- : deterrhip e if

aproces s wastewate r streari i require s contro l an dth e genera l outlin e of requirement s fo

r proces s wastewater"streams
. Th e general approac hfo

r determinin g whic h wastewate r

stream s ar e Grou p 1 o r Grou p 2 woul driot

change
. Determinatio n of

whethe r awastewate r streami s Grou p 1,o

r Grou p 2 wbUldstil t b e base do n th e sam e concentratio n an d flow'rat e criteri aa s th e curren t rule. ' Contro l requirement s fo

r Group 1 wastewate r

stream s stil l requir e that HA P emission s b e controlle dunti l th e HAP s ar e eithe r

remove dfro

mth e wastewate r

o r destroyed
. Today' s proposa l reorganize s § 63.13 2 t o eliminat e redundan t

sections , clarif

y requirements , an dchang e th e orde r o f th e provision s int o amor e reade r friendly format
. Othe r

propose dcharige s includ e us e o

f th e poin t o f determinatio n concep t

instea do f th e poin t of generatio n concep t

(discusse d i n IV.D
. of

thi s prearhble ) an dth e additio n of

languag e prohibitin g th e discar dof certai n organi c materia l int o wate r or Wastewater
. ; Languag e prohibitin g th e discar do f ce'rtai n organi c materia l int o wate r o r wastewate r

woul db e adde da s § 63.132(f)
. Specifically , liqui do r soli d organi c material s containin g greater tha n 10,00 0 part s pe r

millio n o f Tabl e 9 compound s may no t

b e discarde dint o wate r o r wastewate r

unles s th e receivin g strea mi s manage dan dtreate da s a Grou p 1 wastewate r

stream
. Th e prohibitio n woul dexclud e equipmen t leaks ; activitie s include di n th e start-up / shutdown/malfunctio n plan , includin g maintenanc e wastewater ; spills ; an d samples*
. Thi s paragrap hwoul db e adde dt o eliminat e th e potentia l fo r .:.- . dumpin g o f

hig hconcentratio n organi c streams , suc ha s off-specificatio n product , irit o th e sewer . Th e EP A seek s commen t o n the : appropriate.siz e of a sample , - D. Basis of Determining Group Status of a Wastewater

Stream: Change From Point of Generation to Point

of Determination Th e EP A i s proposin g t o revis e th e rul e t o bas e th e determinatio n o f applicabilit y o

f contro l requirement s to awastewate r

streamo n U

s characteristic s a

t th e poin t wher e th e wastewate r

streamexit s th e las t recovery devic e instea dof a t th e poin t o f generatio n (POG)
. Th e ne w locatio n fo r determinin g th e characteristic s o f a wastewate r

streami s bein g calle dth e poin t o f determinatio n (POD) t o distinguis hi t

fro mth e PO Gconcep t use di n othe r

ai r rule s fo r waste an d wastewate r

suc ha s th e Benzen e Waste NESHAP
. A s discusse dearlie r i n th e OVERVIE WO FCHANGE

S TO TH E RULE , this.propose drevisio n i s on e of several change s bein g mad e t o addres s problem s wit hdraftin g clarity an d structur e o

f th e wastewate r

provisions
. Th e propose dconcep t

o f PO D alon g wit hth e revise ddefinition s fo r key wastewate r

term s an dth e provision s fo r in-proces s equipmen t

subjec t t o th e provision s o

f § 63.14 9 i s consisten t

wit h th e emissio n an dcos t

estimate s use dt o suppor t th e Apri l 199 4 rule : 1
. Poin t o f Generatio n Concep t

i n Apri l 199 4 Rul e I n th e Apri l 199 4 rule , th e termPO G i s define da s th e poin t

wher e th e proces s wastewate r

exit s th e proces s uni t equipment
. Th e EPA' s intent with th e POGapproac hwa s t o identif y wastewate r

stream s fo

r contro l prio r

t o opportunitie s fo

r losse s du e t o . emission s t o th e atmosphere , prio r t o dilutio n wit hothe r

wastewate r

streams , an dprio r t o partia l treatmen t

ofth e wastewate r

stream
. I f dilutio n or

partia l treatmen t prio r t o acontro l determinatio n were allowed , some wastewate r

stream s tha t

woul dhav e require dcontro l base do n th e concentratio n .criteri awoul dno t mee t th e requiremen t

o f th e rul e fo

r contro l an dwoul dtherefore no t

b e treated
. A fundamental premis e o f th e PO G concep t i s tha t aclea r distinctio n can b e mad e betwee n proces s equipmen t an d wast e managemen t

units
. I n developmeri t

o f th e Apri l 199 4 rule ; EP A emphasize dtha t

th e distinctio n wa s base do n whethe r

th e materia l arid ; th e uni t i n whic hi t

i s manage di s a n integra l part

ofth e productio n process . Th e EP A ha s learne dsinc e 199 4 tha t industr y ha s numerou s interpretation s o f th e concep t

o f "integra l t o th e process " an dhenc e th e PO Gconcept
. Interpretation s var

y becaUs e evaluatio n o f wha t i s integra l t o th e proces s take s • int o consideratio n economi c an d proces s desig n factor s a s wel l a s knowledg e o

f th e proces s an dth e industry
. Becaus e processe s an d configuration s o

f equipmen t

i n facilitie s subjec t t o thi s rul e var

y widely , i t

i s difficul t to develo p ase t

o f criteri atha t ca n b e use dto make clear

distinction s between , proces s an dwast e managemen t equipment
. Th e combinatio n o f thi s proble mwithth e ambiguitie s an dth e lac k o f specificity i n th e othe r

key wastewate r

definition s (e.g. , wastewater ) ha s resulte di n arul e tha t may b e misinterpreted
. It

i s importan t

tha t th e rul e b e clea

r an dunambiguou s s o tha t al l partie s interpre t

it s requirement s consistently
. Becaus e o f issue s raise dsinc e promulgatio n of

th e Apri l 199 4 rul e concernin g EPA' s inten t

an dth e

. difficult y o f makin g th e PO G* : . determination , th e EP

A ha s reevaluate d' th e POGconcept
. A s par t of thi s reevaluation , EP

A reviewe dthe.dat a tha t were use dt o develo p th e emissio n . an dcos t estimate s fo

r th e Apri l 199 4 rule
. It wa s determine dfromthi s revie w tha t th e industr y response s i n 199 0 t o th e sectio n 11 4 wastewate r questionnaire s di dno t

reflec t a consisten t

understandin g of

wha t EPA considere dto b e wastewate r an dwha t EP A mean t b y th e concep t

of POG
. I n man y cases , th e respondent s provide d informatio n fo

r alocatio n tha t

wa s after th e poin t that EP A considere dt o b e th e POG
. In afe

w cases , it

wa s no t possibl e t o determin e fro

mth e proces s descriptio n an dth e descriptio n o f wastewate r

stream s whethe r

th e informatio n wa s or

wa s no t afte r th e POG
. Thus , becaus e o

f th e lac k o f consistenc y i n th e response's , it.i s no t possibl e t o b e certai n tha t th e emissio n an dcos t analyse s use di n developmen t ofth e Apri l 199 4 rul e reflecte dth e PO G concep t i n th e rul e language
. Moreover , it i s no w apparen t

tha t th e PO G approac hi s inherentl y foreig n t o th e wa y facilit y operator s vie w thei r processe s an di t

i s unlikel y tha t

thi s concep t woul db e generall y accepte d an dunderstoo db y th e regulate d community
. Becaus e of

thes e practica l problems , th e EP

A conclude dtha. t

it

wa s appropriat e t o develo p ane w approac hfor

th e initial , poin t

of : evaluatio n o

f awastewate r

stream ; Th e . ne w approac htha t

woul dreplac e th e PO Gi s calle dth e poin t

o f determinatio n (POD)
. 2
. Poin t o f Determinatio n Concep t

i n . ' Today' s Proposa l Th e EPA' s inten t

i n developin g th e PO D approac hi s t o hav e adecisio n criterio n tha t

i s feplicabl e ari d unequivocall y specifie s th e locatio n fo r evaluatio n o

f awastewate r

strea mfo

r#~<~14^"S. - j * f'^&CJfa*

4371 2 Federa l Registe r/ Vo l 61 , N o 16 6 /

Monday , Augus t26 , 199 6 / Eroposed-Rule s P.1 6

th e purpose s o

f control
. Th e PO

D therefor e encompasse s eac hpoin t wher e proces s wastewate r

exit s th e las t recovery device
. Thi s propose d definitio n of

POD woul dallo w afacilit y to recove r chemical s fo

r fuel value , use , reus e or fo r sal e fo r fuel value , use , o

r reuse . A s wit hth e POG , unde r th e PO D approac howners/operator s woul dno t b e allowe dt o mi x stream s togethe r fo r th e purpos e of

escapin g complianc e b y th e dilutin g o f

wastewate r

stream s t o a leve l belowth e 1000 ppni w atl O L/niiri o r greate r flowrat e o r

th e 10,00 0 ppni w a t an y flowrat e level
. ;lJnde r th e POD approach , proces s unit s Conveying proces s fluid s i n th e chemical
. . manufacturin g proces s uiii t ar e subject , t o th e requirement s establishe di n Tabl e 35
. Tabl e 3 5 i s consisten t wit hth e . suppressio n requiremen t fo r a wastewate r

strea mrequirin g control
. Again , th e EPA' s inten t

i s t o allo w proces s fluid s tha t

hav e recovery potentia l t o b e sen t

t o recovery devices ; however , thes e fluid s ar e require dt o b e manage ds o a s t o minimiz e th e potential fo r losse s du e t o emission s t o th e atmosphere
. I n addition , makin g th e POD th e locatio n afte

r th e las t recover y uni t woul deliminat e th e nee dfo r th e recycl e optio n allowe dunde r th e curren t wastewate r

provisions
. Th e EP A believe s th e PO

D approac h woul dallo w mor e flexibility tha n currentl y provide di n th e rul e with regar dto material s recovery whil e eliminatin g confusio n over th e initia l poin t o f evaluatio n fo

r awastewate r strea mfo r th e purpose s o

f contro l and , at th e sam e time , maintai n th e suppressio n requirernent s for mor e concentrate dstreams
. Th e POD approac hwoul dals o make th e wastewate r

provision s consisten t

with

. th e dat acollecte dfo

r developtrien t

o f th e rul e an dwit hth e othe r provision s i n th e rul e concernin g definitio n o f process . Ther e ar e n o expecte dchange s i n emissio n reductions , or cost s associate dwit hthi s revisio n t o th e rule
. Th e EP A consider s th e propose dPO D approac ht o provid e aworkabl e alternativ e t o th e PO Gapproac hbecause
. th e HO N addresse s th e othe r emissio n point s irith e cmpu . Th e EP A doe s not " believ e tha t

th e POD approac hwoul db e appropriat e for

othe r rule s tha t

ar e no t
. a s comprehensiv e i n th e coverag e o f - emissio n points
. Th e POD concep t woul dnot.b e appropriat e ;in .case s wher e i t i s know n tha t

th e othe r emissio n point s woul dno t

b e subjec t

t o an y contro l requirements
. E. Changes to Waste Management Unit '•: Provisions 1
. Clarification s t o Proces s Wastewate r Provision s Th e propose dclarification s t o th e tex t concern th e mixin g o

f Wastewater

i n tanks , method s t o insur e awate r sea l i s maintained , us e of

aflexibl e shiel d restrictin g win dmotion-acros s th e spac e betwee n th e dischargin g pip e ari dth e '';'•; ' receivin g drain , an dventin g from•••;.'-•'•. • : "'•; junctio n boxes' ; Tex t

wa s adde dt o r - C' v explai n that

alternativ e riiethods : (other'-

- tha n th e exampl e give n i n th e rule) '•''•':, ; u \ ; coul dbemuse

dt o demonstrat e tha t

water" ' seal s ar e maintaine dproperly
. ' '":•. Clarificatio n wa s adde dt o the
. ';'' ; ' ••''''''• requirement s concernin g th e flexible. ; shiel dt o describ e mor e fully wherethe';;;
. shiel dshoul db e located
. Th e propose d clarificatio n for'th e ventin g o f junctio n boxe s wa s writte n t o explai n th e - differenc e betweer

i ventin g t o th e : , atmospher e o

f junctio n boxe s with, , gravity wastewate r

flo w an dventin g t o : . • th e atmospher e o

f junctio n boxe s wit h.'-.

- wastewate r

pumps . Unde r

today' s , propose dclarificatio n t o th e provisions,- , wate r seale djunctio n boxe s wit hgravity flow o r system s tha t

operat e wit honl y sligh t fluctuation s i n th e liqui dleve l are allowe dt o ven t

t o th e atmospher e throug haspecifie dsiz e o f ven t pipe
. Junction boxe s wit hpump s tha t turri o n an doff , allowin g th e junctio n bo x t o alternatel y empty an dfill , ar e not , allowe dt o ven t

t o th e atmospher e du e to th e vapo r

headspac e turnove r

tha t occurs . Clarification s were'iriad e t o th e proces s wastewate r

provision s fo

r wastewater.tank s t o expres s mor e fully V th e EPA' s inten t

t o suppres s emission s fro mthes e systems
. 2
. Floatin g Membran e Cover s Sinc e Apri l 199 4 th e EP

A ha s . receive dinquire s a s t o the.reaso n floatin g membran e cover s wer e no t allowe dunde r

(ae wastewate r

. • provision s ofth e HON
. Th e EP A ha s allowe dth e us e of

. floating membran e , cover s i n othe r

rules
. Th e EP

A considere dthi s inquir y anddecide d• , . tha t floatin g membran e cover s wouldb e : acceptabl e fo

r suppressin g emissions ; , ; ; fromsurfac e impouridmentS ; Provision s j woul dh e adde dt o th e surfac e • • impoundmen t

requirements.derived
. ; . fromth e standard s i n Subpart QQp f 4 0 CF Rpar t ,6 3 fo r floatin g membrane:
. >•. , .. . covers . Th e provision s provid e th e / requirements'for

th e materia l use dfo

r •„'
. constructio n o

f th e floating membran e cover an dfo r th e installatio n o f

ti e --.' : cover.'
. '
. 3
. Individua l Drai n Syste mSuppressio n Requirement s Sinc e promulgatio n of

th e Apri l 199 4 rule , industr y ha s raise dconcern s tha t th e individua l drai n syste msuppressio n requirement s woul dlea dt o vapo r lock i n wastewate r

collectio n systems
. A vapo r loc k occur s i n aWastewater syste mwher i th e wastewate r attempt s t o flow int o o

f ou t o f an are atha t

i s seale d an dm e pressur e i n th e syste mcanno t equalize , thereb y restrictin g th e flow o f "th e wastewater
. Th e EPA' s inten t i s t o : suppres s emissions ' fro

mth e collectio n system;ahd,np t

t o seal th e syste msuc h'. tha t grayity"flo w system s wil l b e inoperative
. Th e concer n ove r potentia l for vapor/lbc k

t o occu r i n th e individua l drai n system.woul db e addresse db y removin g th e requirement t o gaske t an d latc hcover s o r

openings
. I n today' s propose damendments , th e requiremen t

t o seal , gasket , o r

latc h cover s o r openings i n th e individua l drain : syste mha s bee n deleted
. Th e proposed , amende dtex t

woul dno w rea d thit-p^eriing s shal l b e equippe dwit ha -tight-fittin g soli dcoyer

(i.e. , n o visibl e gaps , cracks , or

holes)
. Th e EP

A believe s tha t tM s requirement

woul dminimiz e emissibri s fromopening s i n wastewate r treatmen t system s an dcan b e me t withou t creatin g avapo r

lock
. Th e EP

A
.

. recognize s tha t

normall y ther e wil l b e a "visible " poin t

o f junctur e betwee n th e cover an dth e opening , suc ha s wher e a manhol e cove r

contact s th e manhol e frame
. Th e poin t

o f junctur e generall y i s athin , visibl e lin e o

r crac k runnin g aroun dth e circumferenc e of th e cover . Thes e point s o

f junctur e ar e no t prohibited
. Th e intent

i s t o prohibi t gap s or opening s that

allo w ai r flo w int o or ou t ofth e collectio n system
. A tightl y fittin g soli dcover-wil l contact.the
. manhol e framein suc haway tha t ther e is , asurfac e (cover) t o surfac e (frame) contact, : Certai n mino r

surfac e irregularities , suc ha s thos e associated ' withamanhol e cover

manufacture db y casting , ar e acceptable
. A gap betwee n surface s tha t

ar e riot intende dfo

r sealin g i s acceptable , For

example , aga

p -betweer i thepute r

rimo f amanhol e : cover an dth e inne r

ri mo f th e manhol e i s acceptable , if

th e actua l sealin g

. surfac e i s betwee n th e botto mof th e cbver.arid-th'btb p of

th e manhole ^ ; Plugge do f cappe dhole s (suc ha s plugge do r

cappe dhole s t o inser t

atoo l fo r remova l of

acover) ar e acceptable
. - Remova l ofth e plug s or

cap s i s unacceptable ; excep t

for th e purpos e o f

-

. ' conductin g thos e activities'fo r whic h• -'.-•

• m e rul e allow s th e cover

t o b e opene d an dprovide dth e plu g or

cap i s replace d upo n completio n o

f th e activity
. Warpe d cover s tha t

creat e aga

p fo r ai r passag e£>?.:%••: '••'• •• - - " " mmffl^P^?-*:*-- ' : : •'ri'r•••'•••"- P.1 7 >-$.- : •.; ' ^-V-^V-: ' • • '^'^?.^"'i^-'. irr

- , y<^f^fi^fPS^SjSBS!B


### Federa l Registe r/Vol
. 61 , No
. 16

6 /Monday , August

26 , 1996 /

Propose dRules 4371 3

. ar e unacceptable
. Th e EP A believe s tha t relaxin g th e requirement s fo r tightl y fitting soli dcover s fo

r individua l drai n system s wil l suppres s emission s effectivel y whil e als o allowin g smal l change s i n pressur e t o occur in th e syste mand , thereby , eliminatin g th e proble mfro

mvapo r lock
. 4
. Repai r Tim e Allowe dfo

r Waste Managemen t

;Unit s The , Apri l .199.4
. rul e provide s that
. . repai r ca n be.delaye dfor

u p t o 1 5 or

4 5 : day s dependin g o n th e typ e o f wast e - - managemen t

unit
. Th e EP

A ha s receive d request s that.4 5 day s b e allowe dfo r repai r of
. al l type s of

wast e managemen t units
. Thi s chang e wa s requeste di n orde r t o simplif

y implementatio n o

f th e rule , th e EP

A evaluate dth e nee dfo

r additiona l tim e for

repair s fo

r som e type s o f unit s an ddetermine dtha t th e Apri l 199 4 rul e provision s di dno t addres s situation s wher e part s coul dno t b e obtaine di n th e specifie dtim e period
. I n addition , du e t o a n oversight , § 63.14 0 di dno t

allo w delay o

f repai r whe n th e wast e managemen t uni t wa s take n ou t o f service
. A s aresult , EP

A i s proposin g revision s t o § 63.14 0 to allo w dela y of repai r whe n wast e managemen t unit s ar e take n ou t

of servic e an dwhe n additiona l tim e i s necessary t o obtai n . spar e parts
. Th e propose drevision s d o no t revis e th e tim e provide dfo r repai r o f som e wast e managemen t unit s fro m .1 5 day s t o 4 5 days
. F. Changes.to §§63.138, 63:144; and 63.145• 1
. Genera l Thre e section s of

today' s propose d rule , § § 63.138 , 63.144 , an d63.145 , wer e rewritte n t o improv e clarity , to incorporat e th e poin t

o f determinatio n concept , an dt o ad dflexibility i n th e complianc e demonstratio n fo r facilitie s usin g biologica l treatmen t processe s t o achiev e th e contro l requirements. ' Revision s t o § 63.14 4 in.th e Apri l 199 4 rul e containe di n today' s proposaj
. are reorganizatio n for

clarity ; additio n of ' method s an da n alternativ e validatio n procedure ; deletio n o f

th e ferir i VOHA P •fro mtext ; ari ddeletion*o f

simpl e equation s tha t

ar e unnecessary . Thes e thre e section s ar e discusse dtogethe r becaus e th e change s mad e t o on e of , the mmos t

likel y appear s i n al l thre e of th e sections ! A specifi c chang e wil l b e discusse dwhere.i t

firs t appear s o r

ha s thernostimpact
. . ---- - 2
. Change s to § 63.138 , Proces s Wastewater

Provisions—Performanc e Standard s fo

r Treatmen t

Processe s Managin g Group 1 Wastewate r Stream s and/o r Residual s Remove dFro mGroup 1 Wastewater

Stream s Sectio n 63.13 8 contain s provision s fo r contro l o f Group 1 wastewate r

stream s an dresidual s fro

mGrou p 1 wastewate r streams
. Th e mos t

significan t

change s propose dt o § 63.13 8 are : reorganizatio n for clarity ; deletio n o f

recyclin g an d proces s uni t

alternative , a s Contro l options ; technica l correction s t o th e desig n steari i strippe r

specification s an d removal of

unnecessar y specificatio n o f stea mquality ; clarificatio n of complianc e demonstratio n procedure s that may b e use dfo

r biologica l treatmen t processes ; clarificatio n tha t treatmen t i n serie s i s allowed ; consolidatio n o

f provision s fo

r th e 1 megagra msource-wid e exemptio n int o § 63.138 ; an dclarificatio n o f whe n desig n evaluation s ma y b e use dt o derhonstrat e complianc e instea dof performanc e tests
. 3
. Deletio n o

f Recyclin g an dProces s Unit Alternativ e Option s Fro m§ 63.13 8 Th e recyclin g an dproces s uni t alternativ e option s (Apri l 199 4 rul e paragraph s (b)(l)(i),'(c)(l)(i) , (d)(2)(ii) , - an d(h)(1) , an dparagrap h(d) , . respectively ) woul db e delete dfro m today' s propose drule
. Bot hoption s woul dbecom e unnecessar y unde r th e PO D concep t propose dt o replac e th e POGconcept..Th e recyclin g optio n allowe dan owne r

or operato r t o achiev e complianc e b y recyclin g aproces s strea mt o aproces s unit
. Th e recyclin g provision s i n paragrap h(f ) ofth e Apri l 1994 rul e requir e tha t

th e wastewate r

or residua l no t

b e expose dt o th e atmospher e an dtha t

wast e managemen t unit s i n contac t

wit hth e wastewate r stream s o r

residua l compl y wit hcontro l an dinspectio n an dmonitorin g requirements
. Wit

hth e propose dpoin t o f determinatio n concept , th e recyclin g optio n woul dbecom e redundan t becaus e a s lon g a s aflui dstay s i n th e process , i t woul dnotb e awastewate r subjec t to.th e provision s o

f § 63,138 ; instead , i t woul db e subjec t

t o th e othe r provision s of

th e rul e suc ha s storag e .

- vessel s o r § 63.149
. . .-•':...-••'.
. 4
. Clarificatio n That

Treatmen t

i n Serie s I s Allowed__—

- Althoug hi t

i s no t stated , clearly , th e Apri l 199 4 rul e intende dtha t mor e thari on e treatmen t

proces s coul db e Usedt o compl y wit hth e rule
. Today' s propose d amendment s woul dprovid e provision s • fo r treatmen t i n serie s i n § § 63.13 8 an d 63.14 5 an dwoul dclarif

y EPA' s intent
. Treatmen t i n serie s mayb e use d whethe r o r no t treatmen t

processe s ar e connecte dby
. har dpiping
. However , inle t an doutle t

mas s flow rate determinatio n fo

r complianc e demonstratio n differ , dependin g o n whethe r har dpipin g i s use dt o connec t treatmen t processe s an dwhethe r

a biological treatmen t

proces s i s part

o f th e series
. 5
. Consolidatio n o

f Provisions , fo

r th e .. . On e Megagra

mSource-Wid e Exemptio n Int o §63,13 8 Th e provision s fo

r th e 1.megagra

m; source-wid e optio n woul db e clarifie d an dwoul db e consolidate dfrom § § 63.138.an d63.14 4 h i th e Apri l 199 4 rul e int o § 63.13 8 i n today' s propose d amendments
. Thi s woul dmak e the
. provision s easie r

t o findan dunderstan d for th e reader
. 6
. Alternativ e Method s t o Metho d30 5 use di n §63.14 4 , ' Th e EP A i s proposin g t o revis e th e rule , t o allo w us e of

alternativ e method s fo r Group 1 or

Group 2 determination s fo r proces s wastewate r

stream s i n lie u o f Metho d305
. Th e EP

A specificall y reviewe dMethpds624 , 625 , 1624 , an d 162 5 an dha s determine dtha t thes e method s may b e use dwit hcertai n

. additiona l requirements
. Thes e requirement s are specifie di n § 63.14 4 (b ) o f th e propose damendments
. Othe r method s may b e use dif

the y ar e validate db y th e Metho d30 1 validatio n procedur e a s discusse dbelow
. Becaus e th e alternativ e method s determin e actua l concentration s o

f th e organi c compounds , th e fractio n measure d(Fm ) value s liste di n tabl e 3 4 can b e use dt o adjus t th e alternativ e metho d
. measurement s t o avalu e representativ e o f what Metho d30 5 woul dprovide
. Metho d30 5 wa s develope db y EP A t o identif y stream s requirin g contro l fo r ai r emissions ; therefore,.th e metho dwa s develope dspecificall y t o retai n an d measur e organi c compound s of concer n froma n ai r

emissio n perspective
. Th e Office o f Water method s (Method s 624 , 625,1624 , an d1625 ) wer e develope dfo r different purpose s an dwoul dno t necessaril y addres s ai r

concern s a s doe s Metho d305
. Th e EP

A use dfour

criteria
. o f Concer n fromth e ai r

perspectiv e t o . •

•

. evaluate , th e methods
. Thes e four criteri awer e use dt o ensure , tha t th e alternativ e metho dretainedan d.:••• ' quantifie dth e organi c compound s of

. concern , generall y referre dt o a s targe t ' compounds
. Th e first.criterion istha t th e metho dprovid e asamplin g approac hthat

woul dminimiz e th e los s bfvolatile s fromth e sampl e whil e maintainin g sampl e integrity
. Th e secon dcriterio n i s tha t

th e metho dP.1 8 t- vv » 4371 4 Federa l Registe r/ Vo l 61 , No . 16 6 /

Monday , Augus t2£ , 199 6 / Propose d Jtule s defec t th e organi c compound s o f concern . Third , th e metho dmus t hav e

. adequat e up-fron t

qualit y assuranc e an d qualit y contro l t o ensur e vali ddata
. Finally , th e alternativ e metho dmus t correc t fo r analyt e preparatio n an d analysi s bias
. Tha t

is , th e metho d adjust s t o th e actua l concentratio n o f th e compoun di n th e sample
. th e EP A ha s compare dMethod s 624 , 625,.1624 , an d162 5 agains t th e fou r criteri aliste dabov e an dpropose s t o allo w these s method s t o b e Used, a s . alternativ e method s to Metho d30 5 wit h som e additiona l requirement s a s : specifie di n th e propose drevisedrule. , Th e EP A i s proposiri g t o allo w th e us e of alternativ e ihethods.base do n th e belie f tha t mos e parties'usin g thi s alternative : approac har e followin g th e • ••• ' procedure s specifie di n th e alternativ e metho dan dar e no t

usin g som e modifie dversio n of

th e method
. On e o

f th e additiona l requirement s propose d
. consist s o f employin g asamplin g an d collectio n procedur e tha t minimize s th e volatilizatio n o

f organics
. For

Method
. 625 , EP A propose s t o requir e correction s t o th e compound s fo r whic h th e analysi s i s bein g conducted
. For example , Metho d62 4 requires initia l calibratio n o

f the analytica l syste mwit h th e targe t compounds
. Th e fou

r method s als o specif

y th e lis t of analyte s fo

r whic hth e method'Ca n b e used
. Additiona l compound s may b e adde dto th e fou r reviewe dmethods ' analyt e list s b y usin g th e Offic e o

f Water' s Alternativ e Tes t

Procedur e (40 CF

R 136. 4 an d136.5)
. Additiona l method s othe r tha n thos e previousl y mentione dals o ma y b e use d i n lie u o f Metho d30 5 if

aprocedur e tha t minimize s los s of

volatil e organic

compound s durin g samplin g an d collectio n i s employe dan dif th e metho di s validate di n accordanc e wit h section s 5. 1 o r

5.3 , an dth e correspondin g calculation s i n section s 6. 1 or 6.3 , o f Metho d301
. Othe r

EP A method s ma

y b e validate dusin g Appendi x D o

f par t 63 , "Alternativ e Validatio n Procedur e fo

r EP A Waste Methods" , provide dtha t aprocedur e tha t minimize s los s of

volatil e organi c compound s durin g samplin g an d collectionis-als o b e eihployed ; 7
. Deletio n o

f Tenri"Volatil e Organi c Hazardous.Ai r

Pollutant^; , ,,,.. . Th e EP A foun dtha t

man y i n th e ; -

. - regulate dcommunit y foun dth e terminolog y "volatile.organi c hazardou s ai r pollutant" ; (VOHAP) corifusing
. The : ter mVOHA

P concentratio n i s Use

di n '•<•:< th e Apri l 199 4 rul e t o rriear i th e weigh t concentiatio n of

Tabl e 9 HAP' s a s determine db y Metho d305
. Thi s mean t whe n a'VOHAP concentratio n wa s required, th e results fromimethod s othe r tha n Metho d30 5 ha dt o b e adjuste db y / th e compound-specifi c fraction .- - measure dfacto

r (Fm ) liste di n tabl e 3 4 o f subpart Gt o convert

actua l concentratio n t o Metho d30 5 concentration
. Whe n th e Apri l 199 4 rul e specifie daHA

P concentration , result s fromMetho d30 5 were require dt o b e adjuste db y th e F

mfactor s t o correc t

t o th e actua l concentratio n whileresult s •'...- fromothe r

method s woul db e use da s .v j measured,(withou t

F madjustment)
. .., " Withtoday' s propose damendments;;-: : ' § § 63.14 4 an d63.14 5 pfih e rule ^ vvquld^ explicitl y stat e whe n Fmadjustment s ..r'. ^ ar e appropriat e rathe r

tha n relyin g on:., . usin g th e termVOHA

P t o corive y EPA' S intent
. Th e propose darhendment s woul dals o rerriov e th e ter mVOHAP.;;-•;

- Als o unde r

th e propose damendments , - i t woul db e clarifie di n §63.14 4 tha t
. annua l averag e concentratio n may b e expresse deithe r

a s adjuste db y the'F m.... . .factor s or withh o adjustment
. ; 8
. Change s t o §63.145 , Proces s Wastewater—Tes t

Method s an d Procedure s to Determin e Complianc e

. Sectio n 63.14 5 contain s th e ' • provision s tha t

explai n ho w t o demonstrat e complianc e wit hth e performance ; standard s i n §63.138
. Several significant

change s ar e propose d to thi s section ; I

t wa s rewritte n t o improv e draftin g quality , provid e clear statement s o

f EPA' s intent , an dcorrec t errors . 9
. Reorganizatio n o

f § 63.14 5 In today' s proposal , § 63.14 5 i s reorganize dt o clarif

y requirement s an d-i provid e th e reade r

withan understandin g o

f whic hparagraph s t o us e fo r demonstratin g complianc e wit h• th e compUanc e options-in" § 63.138 : Thre e clarification s are o

f particula r note : (1 ) "Representativ e operatin g conditions " fo

r treatmen t processe s an d contro l device s are specifie di n paragraph s (a)(3 ) an d(a)(4 ) o f § 63.145 ; (2) conditions.unde r

whic ha performance , testo r

desig n evaluatio n i s allowed

- orunde f

whic hneithe r

is.A^" ;

. require dar e specified.i n paragraph s ,-'.• • (a)(l).and.(a)(2) ; and , (3 ) Clarificatio n of/ ; whe n Fmadjustrnent s ar e allowed:ar e •> y include dthroughou t

th e section : Thes e ' propose dclarification s wer e i n th e Apri l 199 4 rul e hu t

ma y hav e bee n unclea r o r place di n othe r

sections , causin g readers/difficult

y i n determinin g howthesection s fit - >: > - :;•:.. ? togetherrith e reorganize dsectio n would " als o mak e provision s fo

r measuring ' '•>

* " concentratio n an dflow rat e consistent : ; amon g paragraphs ; EP

A believe s thes e change s i n rule-languag e wil l improv e - Clarit y an dwil l iriiprbv e reade r comprehension
. 10 , Deriiohstratin g Complianc e fo r Biologica l Treatmen t

Processe s Concern s hav e bee n raise dtha t th e requirement s concernin g demonstratin g complianc e fo

r biologica l treatmen t processe s are.confusin g an dth e . requiremen t

fo r site-specifi c fraction :bipdegfade d(Fbip ) determination s i s ••• • unnecessaril y burdensome , T o respon d

- to'these'conCerns , th e EPA reevaluate d theperfbfmaiicedeterminaitior i ;

- requirement s for

biologica l treatmen t .•processe s an dfoun dtha t adjustment s Couldb e rhade't o th e requirements.
: consistentyyi mth e mteri t o f th e rule , th e EPA' s interi t

wa s t o allo w th e us e o f biologica l treatmen t

unit s that'..-.". ' achieve dfee require dmas s remova l of tabl e 9 cofripdund s throug h- biodegradationan dno t

through. , emission s t o th e atmosphere
. Today' s propose damendment s woul dadd
. paragraph^ ) whic hdescribe s ho w t o detertnihe.thesite-specifi c fraction of Tabl e 8 and/o r

Tabl e 9 compound s biodegradatedtFbio) ; clarif y tha t
. biologica l treatmen t

processe s mus t

us e on e ofth e requiredmas s removal option s t o compl y wit hth e rule ; ad d flexibilit y i n demonstratin g complianc e fo r biological treatmen t

processes ; an d ad dprovision s tha t

allo w asubse t

ofth e Tabl e 8 o r Tabl e 9 compound s t o b e use dt o demonstrat e compliance
. Paragrap h(h)—ho w t o determin e Fbib—i s adde dt o make th e provision s easie r t o findtha n i n th e Apri l 199 4 rule
. In addition , § 63.145(h) , togethe r • wit happendi x C t o part 63 , provid e • : fnor e flexibilit

y t o th e owne r

o r operato r • t o demonstrat e complianc e fo r biological-treatmentprocesses
. Th e • Apri l 199 4 rul e require downers-an d operator s usin g biologica l treatmen t processe s t o demonstrat e complianc e using.'appendi x C t o part

6 3 t o determin e Fbio
. Today' s proposa l recognize s tha t

fo r som e biologica l treatmen t processes , ales s rigorou s , determinatio n .o

f Fbi o i s sufficien t

t o deriionstrat e compliance , , . Whe n abiological.treatmen t proces s i s used , on e of

th e require dmas s . . .-fembva l bptipns;'§,63:i38(f

) 6r(g) , mus t i bebhosenasthb;cpmpUanceoption , thi s was;EPA' s inten t

ii i th e Apri l 199 4 rulebutitwas'hb t

state dclearly
. Th e ' provision s thiat-ma

y b e use dt o - ''•'.•'• • demonstrat e complianc e depen do n whethe r th e biologica l treatmen t

proces s :i s bpe ho f

Closed ; h i eac hcase,'th e -"••:'•

- propbsed^rUle'specifie s which- ' ! > r - •'•complianc e demonstratio n provision' s '
• ; may b e used
. Fo r ope n biologica l treatmen t
. . processes , volatilizatio n i s a n importan tP.1 9

Federa l Registe r/

Vol
. 61 , No
. 16 6 /Monday , Augus t 26 , 199 6 /

Propose dRule s 4371 5
concern, . Therefore , t o demonstrat e compliance , th e owne r

o r operato r mus t determin e th e mas s o

f th e Tabl e 8 or Tabl e 9 compound s tha t

i s remove ddu e t o biodegradatio n rathe r

tha n volatilization
. I

f th e ope n biological treatmen t proces s i s a n enhance d biologica l treatmen t

process , th e sourc e woul dhav e mor e flexibility i n demonstratin g coriipliance
. To incorporat e thi s flexibility , EP A looke d at th e Tabl e 9 compound s an d determinedwhic har e mor e readil y biodegrade dan dwhic hare . mor e likel y t o volatiliz e before biodegradatio n ca n . occu r i n a n enhance dbiological , treatmen t process . . 11
. Performanc e Requirements fo r Ope n Biological Treatmen t

Processe s Becaus e of.th e reevaluatiort o f th e Tabl e 9 compounds , th e EP A wa s abl e t o separat e th e compound s o n Tabl e 9 int o thre e list s whic happear i n tabl e 36
. Thes e list s woul db e use dtogethe r wit h othe r provision s t o specif

y ho w th e sourc e may.demonstrat e compliance
. Table.3 6 may onl y b e use dfo r wastewate r

stream s treate di n a n enhance dbiologica l treatmen t syste ma s define db y th e propose drevisions t o th e rule
. Th e developmen t

o f th e thre e list s i n tabl e 3 6 wa s basedo n th e individua l -compound' s fractio n emitte d(Fe) , fraction remove di n asteamstrippe r (Fr) , an dfraction biodegrade di n a biologica l treatmen t

uni t (Fbio)
. Th e value s fo r F e an dF r tha t were evaluate d wer e base do n analysi s performe dfo r th e Apri l 199 4 rule
. Documentatio n o f thi s analysi s i s availabl e i n th e docke t A-90-23
. Th e Fbi o value s use dt o compil e th e thre e list s i n fabl e 3 6 wer e base do n defaul t

value s fo r an enhance d biologica l treatmen t

uni t fromth e EP

A Water 8 model
. Lis t

1 consist s o

f Tabl e 9 compound s tha t

hav e F r value s approximatel y equa l t o o r les s tha n thei r Fbi o values , an dF e value s tha t ar e i n th e middl e t o lowe r

volatility range . Lis t 3 consist s o f

Tabl e 9 compound s that
. hav e Fr value s o f 0.99 , Fbi o values tha t ar e considerabl y lowe r

tha n 0.99 , an dF e value s i n th e highe r

volatility range . Th e Tabl e 9 compound s tha t

wer e lef t afte r thi s evaluatio n becam e Lis t 2
. A performanc e demonstratio n woul d not.b e require dfo

r enhance dbiological,-
. treatmen t system s tha t

receiv e wastewate r

stream s tha t

requir e contro l an dtha t contai n onl y Lis t

1 compound s o n tabl e 36
. A n exampl e woul db e ar i activate dsludge ; uni t

tha t meet s th e propose denhance dbiologica l treatment : syste mdefinitio n an dtreat s Group 1 wastewate r

stream s tha t

contai n onl y methano l an dnitrobenzen e (Lis t 1 compounds)
. A complianc e demonstratio n woul dno t b e require d becaus e th e only Tabl e 9 compound s requirin g contro l appea r

o n Lis t 1
. Fo r enhance dbiological treatmen t system s treatin g wastewate r

containin g compound s o n List s 1,2 , and/o r 3 , a performanc e demonstratio n i s required
. Today' s proposal offers several
. technique s fo

r demonstratin g complianc e fo

r an ope n biological treatmen t uni t meetin g th e propose d definitio n o

f an enhance dbiological treatmen t system
. Th e demonstratio n i s performe db y estimatin g th e Fbi o fo r th e syste musin g th e first

orde r biodegradatio n constan t

(Kl ) an dth e form s i n appendi x C t o part 63
. Th e owner/operato r

ma y us e an y o

f th e

. procedure s specifie di n 4 0 CF Rpart 63 , appendi x C t o calculat e th e site-specifi c Kl s fo r compound s o n List s 1 and/o r 2
. Th e owner/operator

may elec t

no t to
. calculat e site-specifi c biodegradatio n rate constant s bu t

instea dt o calculat e Fbi o fo r th e Lis t 1 compound s usin g th e default s fo

r Kl s i n tabl e 3 7 an dt o . follo w th e procedur e explaine di n Form
. II A o f appendi x C
. Fo r

compound s o n Lis t 3 , th e owner/operato r

i s allowe dt o us e an y ofth e procedure s specifie di n 4 0 CF Rpar t 63 , appendi x C , excep t

th e batc htest s procedure , t o calculat e th e site-specifi c Kl
. Biological treatmen t unit s no t meetin g th e definitio n o

f a n enhance dbiological treatmen t syste m ar e allowe dt o determin e th e Fbi o using ' th e site-specifi c K l value s determine d b y any o f th e procedure s i n appendi x C t o part 6 3 excep t

th e propose dbatc h• test s procedure
. Th e EP A believe s tha t

today' s propose drevision s t o th e biological treatmen t optio n add s additiona l flexibilit y withou t sacrificin g reductio n o f emissions
. B y separatin g th e Tabl e 9 compound s int o 3 list s an dallowin g different performanc e requirement s dependin g o n th e propertie s o f th e compound s o n th e lists , additiona l option s hav e bee n mad e availabl e t o th e owner/operator
. Th e EP

A maintaine d th e original intent

o f th e rul e b y limitin g th e additiona l option s t o biological unit s meetin g th e definitio n fo r

- enhance dbiological treatmen t systems
. Th e flexibility allowe db y no t requirin g tha t

th e site-specifi c fraction . biodegrade db e determine dfo r al l Tabl e

. 8 or Tabl e 9 compound s i n th e . "wastewater

streami s predicate do n th e underlyin g assumptio n tha t th e

, wastewate r

i s treate di n a n enhance d

. biologica l treatmen t

system
. Th e definitio n for

enhance dbiologica l '. treatmen t

syste mi s propose di n today' s

. notice. Th e definitio n i s base do n extensiv e discussion s wit hindividual s knowledgeabl e i n th e are ao f biologica l treatment
. Well-designed , operated , an d maintaine dactivate dsludg e system s mee t th e definitio n o

f enhance d biological treatmen t

systems
. 12
. Equation s i n § 63.14 5 Many o f th e equation s i n § 63.14 5 woul db e revise dto mak e mathematica l correction s o r

t o make th e equation s consisten t wit hth e res t

of th e rule
. Th e equation s fo

r contro l devices ' performanc e tests—paragrap h(i ) i n today' s proposal—^ar

e propose dt o b e basedo n th e equatio n i n th e proces s vent s sectio n o

f th e rul e rathe r

tha n th e equation s i n th e Apri l 199 4 rule
. Th e term s i n th e equations;wer e changed.f o make the mconsistent
. Figur e ti n appendi x A t o subpar t

Glist s th e ne w . terms
. ... . 13
. Compound s No t

Require dT o B e . Considere di n Performanc e test s . Today' s proposa l woul dad d § 63.145(a)(6 ) whic hspecifie s whe n > compound s ar e no t

require dt o b e include di n aperformanc e test
. Thes e provision s wer e adde dbecaus e EP A recognize s tha t

no t al l Tabl e 8 o r

Tabl e 9 compound s ar e presenfi n a wastewate r

stream ; an dno t

al l compound s nee dt o b e measure dt o demonstrat e compliance , i.e. , measurin g apredominan t

compoun dmay b e enoug ht o sho w th e mas s remova l ' necessary t o achiev e compliance
. Thes e provision s woul dals o provid e tha t compound s presen t

at concentration s les s tha n 1 ppm w a

t th e POD or compound s presen t

at th e POD at concentration s les s than , th e lowe r detectio n limi t

wher e th e lowe r detectio n limi t

i s greate r tha n 1 ppm w may b e exclude dfromth e performanc e test
. Thi s provisio n wa s adde dt o avoi d imposin g a n unnecessar y analytica l burden
. G : Off-Site Treatment Today' s propose damendment s includ e provision s to ' allo w owner s an d operator s o

f HON source s t o transfe r Grou p 1 wastewate r

stream s o r

residual s off-sit e fo r treatmen t

provide dth e owner/operato r

obtain s fromth e transfere e acop y o

f awritte n statemen t submitte db y th e transfere e toJEPA certifyin g tha t

th e transfere e wil l manag e ari dtrea t

the , wastewate r stream s o r

residual s i n accordanc e wit h th e HON' s provisions , thes e ne w . provision s replace th e existin g provision s i n § 63,132(j ) tha t require d tha t th e owner/operato r

ensur e tha t

th e transfere e complie s wit hthe..
. ':.,..,, : suppressio n an dtreatmen t requirement s of th e rule
. Th e existin g provision s i n § 63.132(j ) ar e revise dt o provid e a mean s t o allow.transfer s of treatmen t responsibilit y withou t

imposin g liabilit yP.2 0



### '>>^$0£0. 4371 6 Federal>Register 7oV6l
. 61 , ^ for action s o f anothe r part y or i th e , owner/operato r

o f th e HON source . Th e ne w provision s allowin g fo r off

sit e o r on-sit e thir dpart y treatmen t requir e th e owner/operato r transferrin g th e wastewate r

strea mo r

residua l t o compl y withth e suppressio n requirement s specifie di n §§63.13 3 throug h63.13 7 of

thi s subpar t

fo r eac h wast e managemen t

uni t tha t receive s o r manage s aGrou p 1 wastewate r stream; or residua l remove dfromaGroup 1 wastewate r

streari i prio r

t o shipmen t

or transport
. Th e bWrier'b r

operato r rhay j ' no t trarisfer'the ' wastewater
- streamor' ;, ; residua l urites' s the.transfere e ha s
• submitted , to EP

A awritte n certificatio n - tha t th e transfere e wil l manag e an d treat , i n accordanc e wit hsubpar t G ; ariy Grou p 1 wastewate r

strea mo r

residua l remove dfrom-aGrou p 1 wastewate r .•'- ' streamtha t

wa s receive dfrom asourc e subjec t t o th e reqUireiherit s o

f thi s ' subpart
. Th e owne r

o r operato r ha s t o notif y th e thir dpart y treate r

tha t th e wastewate r

strea mb r

residua l ha s t o b e handle dan dtreate di n accordanc e wit h
... th e requirement s p f

th e rule * _'./'./; •

. Th e statements.o f

complianc e with th e rul e b y thir dpart y treater s nee donl y b e submitte dt o EPA ; th e provisions'd o no t contain ' or

envisio n an y requirement s tha t

EP A approv e th e writte n statement s before shipment s o f wastewate r

stream s o r

residual s to off

sit e treater s ar e permitted
. Th e propose d provision s provide , however , tha t EP A may revoke o r

suspen dacertificatio n statemen t i n th e even t

th e off-sit

e treate r violate s th e pertinen t

HON wastewate r provisions , th e propose dprovision s als o requir e tha t

th e writte n statemen t fromth e off-site-treater

contai n a: statemen t tha t EP A ha s no t revoke do r suspende dacertificatio n statemen t withi n th e previou s thre e years . Th e inten t o f thi s i s t o provid e an adequat e : incentiv e fo

r complianc e o n th e part

o f th e off-sitetreatefs.
. Th e propose dprovision s als o diffe r fro mth e existin g requirement s i n ' " ; § 63.132(j ) fo

r notic e fromth e owner

/ operato r o f th e HO N sourc e i n tha t

th e requiremen t

tha t notic e b e provide da t leas t onc e ayear

i n th e cas e o

f '
. continuou s shipment s i s replacedby a; requiremen t

onl y fo f notic e at th e outset : of suc hshipiaentsan dwhe n ther e is : a : ; chang e i n th e require dtjeaurierit
. :In -: A ?- '/ draftin g th e revised/language;:the -' ;i '' y[\ genera l statements " b f

th e obligatio n ori '"

• " ; off-sit e treater s ir i th e ol d§ 63.132(j)(3 ) s y hav e bee n replace dwit hexplici t cros s : references t o th e applicabl e •--.. ; i^,.

- .requirements. ' Thi s 'eharig e i s proposed ! / t o provide" aclearer : statemen t of ; th e r ] : f.i applicablefequirenierit s ari dt o '• ' '•'•. ' ; • • minimiz e potentia l fo

r ••"•'
. • - • • • misuriderstandirigs/Thi s chang e i s riot •'"' considered , t o b e asubstaritiv e Change i n th e requirements fo

r off-sit e treaters
. Anothe r chang e b f significanc e i n the ; '
. provision s for

thir dparty treater s : concern s th e concep t

o f sale
. Th e phras e i n th e openin g paragrap hof § 63.132(j) , permittin g th e sal e o

f Grou p 1 » wastewate r

stream s o

r residual s "for

an y othe r purpose' ! ha s bee n eliminate diii/. ' th e propose dreplacemen t provisions : ThisChang e i s necessary i n ligh t of thei , revise dapprokcKto.defiriing , ' V ''_'v v wastewater

/ JtaMrerit i n ih e new';'.; ; .;';•;;"'

• apprSacK'i s the^oricep t

tha t a'stjeamis*: ; no t wast e wafer' iiriless ; i t

i s being : :.'
. Sj. " discarded,' ; thus, : th e concep t b f selling:;; ' wastewateris.irmbreriti y iricorisisfent ; ] H:#d(litioh:6f7§63,14.9arid Table 35^. The
. propose daihendment s t o ad d& [ .x\ ne w § 63.14 9 ari dtabl e 3 5 tb.subpar t G {'? • are an outgrowt

ho f th e change

- frbrh th e PO Gconcep t

of th e Aprill99 4 rul e t o . th e POD concep t

i n thes e propose d amendments
. Th e purpos e of thi s new . sectiorii s t o ensur e that

th e organi c HA P Containin g fluid s are properl y ' ' "•' ' • mariagedi n close dsystems ; Tabl e 3 5 list s th e applicabl e requirerrient s fo r drai n o r drai n huh , manhole , lif

t station, ' trench; ; oil/wate r

separator , and'tank
. '•' I. Proposed

Changes to Appendix

Cof Part 63
. th e EP A is:proposin g t o revis e appendi x C t o par t

6 3 to clarif

y th e languag e an dt o ad da n additiona l procedur e fo

r determinin g th e fractio n biodegrade di n abiological treatmen t unit , th e ne w procedur e adde dt o appendi x C i s calle dth e Batc htes t procedure
. ; Appendi x Gcontain s instructio n o n - ho w t o determin e th e fraction biodegrade di n ahiolpgica l treatmen t unit.-Today' s proposa l addresse s severa l issue s concermhgfAppendi x C
. Th e first issu e cbricerrtsproblem s wit h
. concentration s belo w th e detectio n limi t fo r th e effluent

streamfro

mth e Metho d
. . 304 benchscal e reactor. Anothe r issu e ' involvin g th e Metho d30

4 reacto r i s th e tim e ari dexperis e require dto operat e : } th e benchscal e reactor
. Bot hb f thes e issu'eswbul dbe'addresse dbyih e additio n o f

th e Batc htest s procedur e t o appeha^xC
. th e propose dmle,;- ^ ; ;'"'.^.-',' ' ariieridmentswouldallowpwriersari d, , operator s to;us e tjhehatch-tefefs'tb; ' ,'.I••' • deteihpriefjfstpr^^ ^ constant s fo

r cbmpomids'prtXist s 1 arid / or 2 oftbble^^3 4 treate dm aurii f riieetihg th e definitio n o f

aii^enhance dbiblpgical ' treatinen t prb'ce ^ perfofrilahc e Wquirementifipr'bje'n;"^;^ ; bioIogical;p^atmeiit : processe s for. ' ; ' further^irifofmatiorii) ' ' \.,,.' " : TheBatc htest s procedur e consist s o f .< ; th e aerate dreacto r

tes t and'th e sealed•'" i ; reactbr test ; thes e tw o test s ar e les s tim e intensive,'im dthereb y les s expensive , thanthe"Metho d304 procedure
. Thes e tw o test s ar e use dwidel y i n industr y tp desig n biologica l treatmen t units
. Basi c instruction s fo

r th e tw o test s ar e bein g added-t o appendi x C ; however , thes e test s shoul db e conducte donl y b y person s familia

r wit hprocedure s fo

r determinin g biodegradatio n kinetics.
. Referehces s wer e supplie di n appendi x C fo r ftirther information.;..;,''
. '•'.\. f *. th^|(ppendix : Grequirement s woul di
. ;b e falai^ •-'" r Compo^d^resent ! ir i th e wastewate r wbiild(npt;b e requijcedtohay e asite

- ' : specific , first

oriderbiodegfadafio n ^pri_stani;o^ter|rnped.:thepv^ero r bperatbr-.c^:assume;th e first orde r

. bipdegradatip n constan t

i s zer o for

. ariy compoun das;lpn g as , th e require dmass , rempyal ba n b e demonstrated
. J; Proposed

Changes to Methods 304A and304B: •... The'EPAi s proposin g t o mak e mino r revisions'fb'Method s 3 04 A ari d304 B that woul dClarif

y severa l pbint s and ' eliminate ; pfescriptiv e detail s whil e maintairiing'.th e qualit y of th e data
. Method s '304A ' afld - '304B are procedure s tha t may b e use dt o determin e th e biodegradatio n rate s o

f organi c compounds,i n biologica l treatmen t processes . Th e prbpbse drevision s consis t o f makin g th e terminolog y consisten t an dallowin g mor e flexibility inthesetii p an doperatio n o f th e methods
. Th e sectio n discussin g th e oxygen ' contro l syste mwoul db e clarified
. Reference s t o reacto r o r bioreacto r wouJ db e change dt o benchtbpjbibreacto r

fo r consistency
. Additiona l flexibility woul db e adde d throughout ; th e frietho di n nurnerpu s wayssuc ha s elimiriatin g the.. , requirement''-for'aspecifi c siz e reacto r o r aspecifi c blower , no t

requirin g a• '
. specifi c hydrauli c residenc e time , - allowin g alteratio n o

f th e operatio n o

f
. th e Metho d30 4 uni t

t o increas e th e efflueritcbncentratio n abov e th e limi t o f quarititafibnyancl , othe r

ways . Th e EP

A believe s thes e change s vyil l allo w owner s and.bperatbfs mor e flexibility ; whil e mamteiniri g th e origina l inten t o f :me:methQd;v R y.: ! , . i ^3.'.

- • : •.•^••'- ':,'. KyAlternoiiv&Gdn^ forindustrial^aste^hter^ir. : " ; r ; " 'thaET^heiiev^'tha t

tbday ^ .'.U....'. ' pfopbs"al. :riiak.e s the : Wdustiial'.

- '."~.]',- : '["'.. WastewatCT.ACTjriterrially inconsisten t van dis;recpffimen(dihg:t

^ cbhsidefiiifrrevisibhs'tb't ^ : .'.''J'. " ; , Wastewater'prpvisibn s defiiiifion s an d
. controljapprbache s a s discusse dbelo w whe n regulatin g source s covere db y th e - ACT
. Wh e nissue dir

i Apri l 1,994 , th eP.2 1 

# ^^^§§§l§M^0 : 

# ^' i 

# W :: 

# :y * * •« i »•„.*> •* l 

## z% Federa l Registe r

/ Vol
. 61 , No
. 16 6 /

Monday , Augus t

26 , 199 6 /

Propose dRule s $371 3 ACT consiste do

f thre e documents : a September , 199 2 draf

t Industria l Wastewate r

Contro l Technique s Guidelin e (CTG) ; Revision s t o Impact s ofth e Draf

t Industria l Wastewate r

CTG ; an dth e HON wastewate r provision s (a s promulgate di n 1994 ) a s th e mode l rule
. Th e ACT wa s issue dt o assis t State s i n selectin g Reasonabl y Availabl e Contro l Technolog y (RACT

) fo r contro l of volatil e organi c compound s (VOC) from wastewate r

at Organi c Chemicals , •

. Plastics , an dSyntheti c Fiber s (OCPSF)
. Facilities , Pharmaceutica l Plants , Pesticid e Sources , an dHazardou s Wast e Treatirien t

Storag e an dDisposa l
... . Facilitie s i n ozon e nonattairimen t areas . I n today' s action , th e EP

A i s proposin g fundamenta l change s t o th e wastewate r provision s p f

th e HON
. Th e EP

A believe s tha t

thes e propose d amendment s wil l resul t

i n amor e effective " an dbetter-understoo d regulation
. Thus , som e aspect s ofth e ACT ar e inconsisten t

wit hth e revise d wastewate r

provision s i n th e HON , an d shoul dno t

b e use dwithou t

considerin g

. th e inten t

o f th e contro l requirement s an dthes e propose drevisions
. Th e Agency' s inten t

ha s bee n an d continue s t o b e tha t

th e wastewate r collectio n an dtreatmen t

contro l philosoph y wil l b e consisten t betwee n th e Industria l Wastewate r ACT an dth e HON
. Althoug hth e ACT an dth e HO N addres s somewha t

different pollutant s (no t al l VOC' s ar e HAP's , an dvice

versa) , th e technologie s an dcontro l requirements wer e deliberatel y mad e consistent
. Specifically , th e wastewate r collectio n an dtreatmen t

contro l philosoph y i s abasi c approac hdesigne d t o minimiz e emission s fromdesignate d wastewate r

stream s meetin g acertai n : concentratio n an dflo w rate
. Th e approac hrequire s contro l o f th e transfe r o f th e designate dstream s t o atreatmen t unit , treatin g th e wastewate r t o a specifie dlevel , an dControllin g emission s fromth e treatmen t unit
. Althoug hth e basi c wastewate r contro l philosoph y wil l b e th e sam e betwee n th e HO N an dth e ACT , ther e wil l b e major differences
. Th e Industria l Wastewate r

AC T an dth e HON wil l continu e t o differ

i n th e compound s tha t ar e thebasi s for

control ; th e AC T addresse s VOC emission s an dth e HON i s concerne dwit hHAP emissions , th e HON i s anationa l standar dfor portion s ofth e chemica l industr y whil e th e Industria l Wastewate r

ACT , addresse s facilitie s i n ozon e non-attainmen t area s •'- i n four separat e industr y groups , includin g abroade r

definitio n o

f th e chemica l industry
. Th e EP A stil l believe s th e RAC T recommendation presente di n th e Draf

t Industria l Wastewate r CT Gi s reasonable ; howeve r th e Stat e agenc y shoul dconside r al l informatio n presente di n th e Industria l Wastewater

AC T an dthe.HO N alon g withadditiona l informatio n abou t specifi c source s t o whic hth e regulatio n applies
. T o cit e afe

w example s o

f change s t o th e HO N tha t shoul db e considere db y thos e referencin g th e Industria l Wastewate r

ACT : th e principl e o

f a "'poin t of generation " is,bein g revised, substantiall y an drename d rtpoint o f ; determination" ; th e definitio n o f "wastewater " i s bein g revised ; ari d; requirerherit s are bein g adde dfor contro l of emissions i fro mcertai n in

proces s streams
. I

f th e "poin t

of determination " approac hi s adopted , th e State agenc y shoul densur e tha t provision s similar

t o thos e i n propose d sectio n 63.14 9 ar e als o adopted; V
. Administrativ e Requirement s A. Paperwork

Reduction Act Th e informatio n collectio n requirement s o

f th e previousl y promulgate dNESHA

P wer e submitte d t o and
. approve db y th e Office o f Managemen t

an dBudge t

(OMB) ; A cop y o f thi s Informatio n Collectio n Reques t (ICR ) documen t

(OM B contro l numbe r 1414.02 ) may b e obtaine dfromSand y Farmer , Informatio n Polic y Branc h (2136) ; U.S
. Environmenta l Protectio n Agency ; 401 M Street , SW ; Washington , D C 2046 0 o r b y callin g (202) 260-2740
. Today' s change s t o th e NESHA P shoul dhav e n o impac t

o n th e informatio n collectio n burde n estimate s mad e previously
. Th e change s consis t o f ne w definitions , alternativ e tes t
. procedures , ari dclarification s o f requirements
. Th e change s ar e no t additiona l requirements
. Consequently , th e IC Rha s no t bee n revised
. fl.' Executive

Order 12866 Review Unde r Executiv e Orde r

12866 , th e EP A mus t determin e whethe r

th e propose dregulatory actio n i s "significant " and , therefore , subjec t t o th e OM B revie w an dth e requirement s o f th e Executiv e Order
. Th e Orde r define s "significant " regulatory actio n a s on e tha t

i s likel y t o lea dt o arul e tha t .may : ..... . . >-.. . (l)..Have.a n annua l effect

on.th e :.'•';
. economy o f

$10 0 millio n or

mor e or , adversel y affec

t i n amateria l wa y th e economy , asecto r

of th e economy , productivity , competition , jobs , th e environment ; publi c healt ho r safet y h i : State ; local ; o r

triba l government s o r communities ; ;••'

• (2 ) Creat e aseriou s inconsistenc y o r '•'.... otherwis e interfere wit ha n actio n take n or planne db y anothe r

agency ; (3 ) Materiall y alte r th e budgetar y impac t o f entitlements , grants , use r fees , or loa n programs , o r

th e rights an d obligation s o

f recipient s thereof; or (4) Rais e nove l legal b r

polic y issue s arisin g ou t

o f legal mandates , th e President' s priorities , o r

th e principle s se t fort hi n th e Executiv e Order
. Th e HON rul e promulgate do n Apri l 22,1994 , wa s considere d"significant " unde r Executiv e Orde r

12866 , an da regulatory impac t

analysi s (RIA

) wa s prepared
. Th e amendment s propose dv today woul dclarif

y th e fuleran dcorrec t structura l problem s .'wit

hth e draftin g o f some.sections.,Theproposed.
. ^ , ' ameridmerit s d o riot

ad dany'ne w contro l requirements. : Therefore , thi s \ regulatory actio n i s considere dno t '•,• •',••' • significant
. C. Regulatory Flexibility Act Pursuan t t o sectio n 605(b ) of

th e Regulator y Flexibilit y Act , 5 U.S.C
. 605(b) , a s amended , Pub
. L
. 104-121 , 11 0 Stat
. 847 , EP

A certifie s tha t

thi s rul e wil l no t hay e asignifican t

economic ' impac t o n asubstantia l numbe r

of smal l entitie s an dtherefor e n o initia l regulatory flexibility analysi s unde r sectio n 604(a) ofth e Ac t

i s required: For th e reasons discusse di n th e Apri l 22 , 199 4 Federa l Registe r

f5 9 F R19449) , thi s rul e doe s no t

hav e asignifican t impac t o n asubstantia l numbe r o f smal l entities
. Th e propose dchange s t o th e rul e ar e merel y correction s an d revision s tha t

d o no t ad dne w contro l requirement s t o th e Apri l 199 4 rule
. Therefore , th e propose dchange s ar e als o no t considere dsignificant
. D. Unfunded

Mandates Unde r sectio n 20 2 of.th e Unfunded : , Mandate s Refor

mAc t o f 199 5 ("Unfunde dMandate s Act") , th e EP A mus t prepar e abudgetar y impac t statemen t t o accompan y an y propose d or final rul e tha t

include s aFedera l mandat e tha t

ma y resul t

i n estimate d cost s t o State , local , o r

triba l government s i n th e aggregate , o r t o th e privat e sector , o

f $10 0 millio n or

more . Unde r sectio n 205 , th e EP

A mus t selec t th e mos t cost-effectiv e an dleas t burdensom e alternativ e tha t achieve s th e objective s of

th e rul e an di s consisten t

wit hstatutor y requirements. ; ^Sectio n 20 3 require s th e EPA t o -o> establish' apla n fo

r informin g an d advisin g an y smal l government s tha t may b e significantl y o r

uniquel y impacte db y th e rule
. Th e EPAlia s determine dtha t th e actio n promulgate dtoday.dpe s no t includ e aFedera l mandat e tha t may resul t i n estimate dcost s of

$10 0 millio n o r mor e t o eithe r

State , local , o r

triba l government s i n th e aggregate o r t o th eP.2 2



## ~^^r*.<?s^^f®m !



## £"<i-.p'- 'f^^^P I

4371 8 Federa l Registe r/ Vol
. 61 , No
. 16 6 / Monday ? Ajtgus t

26 , 199 6 /

Propose dRule s privat e sector
. Therefore , th e requirement s o f

th e Unfunde dMandate s Ac t d o no t appl y t o thi s action
. Lis t o f Subject s i n 4 0 CF RPar t 6 3 Environmenta l protection , Ai r pollutio n control , Hazardou s substances , Reportin g an d recordkeepiri g requirements
.

. Dated : August.1.5 , .1996
. ; '.
. Caro l M.jBrowner , • AdministratQr.:(f.ivX:;i'

.^:,tXi '•'•• [F RDbcV96^2128 0 File dfe23-96; 8:45;am] , BILLING COD E 6560-60- P' ' '• X - '.'.' • FEDERA L EMERGENC Y - MANAGEMEN TAGENC Y 4 4 CF R Part 6 7 [Docke t No

. FEMA-7192 ] Propose d Floo d Elevatio n Determination s AGENCY : Federa l Emergenc y '-.-;. : Managemen t

Agenc y (FEMA)
. ACTION : Propose drule
. SUMMARY

: Technica l informatio n o r : comment s are•;requeste do n th e propose dbas e (1 % annua l chance ) flood , elevation s an dpropose dbas e floo d elevatio n modification s fo r th e communitie s liste dbelow
. Th e bas e floo delevation s an dmodifie dbas e floo delevation s ar e th e basi s fo r th e floodplai n managemen t measure s tha t th e communit y i s require deithe r t o adop t o r t o sho w evidenc e of

bein g alread y i n effec t

i n order-t o qualif

y o r remai n qualifie dfo r

participatio n i n th e Nationa l Floo dInsuranc e Progra m (NFIP)
. .'•-.

- DATES : Th e commen t

perio di s ninet y (90 ) daysfollowiri g th e secon d publicatio n o f

thi s propose drul e i n a newspape r

o f loca l circulatio n i n eac h community
. ADDRESSES : Th e propose dbas e floo d- elevation s for
. eac hcommunit y ar e availabl e fo r inspectio n a t

th e offic e o f th e Chie f Executiv e Office r

o f eac h community
. Th e respectiv e addresse s ; ; ar e liste di n th e following table , FO RFURTHE RINFORMATIO

N CONTACT

: Michae l K
. Buckley , P.E. , Chief * Hazar d Identificatio n Branch , Mitigatio n Directorate , 50 0 C Stree t S.W. , Washington , D:C
. 20472 , (202 ) 646

- 2756.. : •;' ; - ';.;; • ;•',. , : ,y.,:;,^;;. : ,..'' : , , : ' : „. . SUPPLEMErfTARyWCflMAt ^ Federal ; Emerge^; ^
' propose s tp;mi&iS$6temir^ ^ floodeleyatipnsa^SpdifiedhaSe; '.'• ; -' 'w floo delevationsforeachcbnimunity;-' : ' • liste dbelow , in'accordance ' wit hSection ; 11 0 ofth e FloodDisaste r Protectio n Ac t

•-'- o f 1973,4i 2 U;S:C
. 4104 , ahl^CFR : * a ': f '. : 67.4(a). ; • ; •'•;•'..".'^-.;;?;• ? .;'•' ; '.- v ^!f:;?""?' '

, ITiese.'.propoM'tf!Bas'e' , 'flbqd'^3 : .''i'.-'' ;! *.- ;

. modifie dbas e flbb delevatibrisytbgethe r wit hth e floodplai n riiariageriierit criteri a require db y 4 4 CF R60.3 , are.th e minimu mtha t

ar e required
. The y shoul dno t

b e construe dt o irieari ; tha t th e communit y must ; charige

_ any i - ; existin g ordirtancestha f ar e mor e ; ; ; stringeriti n their.floodplai n - , ; " managemen t

requirements
. The
. . , , ^ communit y ma y a t

an y time enac t

= ; .j. ; stricte r requirement s o f

it s own , or- . pursuan t t o policie s establishe db y othe r Federal , State , o r

regiona l entities
. Thes e propose delevation s areuse dto
. mee t the
. floodplai n management
. requirement s ofth e NFI P an dar e als o use dt o calculat e th e appropriat e flood insuranc e premiu mrate s fo r ne w ;. . • building s buil t

afte r thes e elevation s ar e mad e final , ari dfor, th e contents-i n thes e buildings , . Nationa l Environmenta l Polic y Ac t ' Thi s propose drul e i s categorically'.
. exclude dfro mth e requirement s of , 4 4 - CF RPar t 10,'Environmental,V V -,.' : , - ft . . ' , Consideratidri
. N o environmenta l impac t assessmen t

ha s bee n prepared
. Regulator y Flexibilit y Ac t - ' Th e Actin g Associat e Director , Mitigatio n Directorate , certifie s tha t thi s propose drul e i s exemp t fromth e requirements ofth e Regulator y Flexibility'Ac t

becaus e propose do r modifie dbas e floodelevation s ar e require db y th e Floo dDisaste r Protectio n Ac t

o f 1973 , 4 2 U.S.C
. 4104 , an dar e require dt o establis han d• maintai n communit y eligibilit y i n th e NFIP
. N o regulator y flexibility analysi s ha s bee n prepared
. Regulator y Classificatio n - - : ; : • ^T^his^rppbse drul e i s hqtVsighifican t regulatory:actibnUnderme Criteri aof; , :Sbctibn3jD-bf'ExecutiveOrde r 1286 6 o f -SeptemberS6^19937RegUlatory:' ' / PliMi^g-dn dReview , 5 8 F R51735
. • ExecuriveOrde r

12612 , Federalis m Thi s propose drul e involves'n o policie s tha t

hav e federalis m implication s unde r

Executiv e Orde r 12612 , Federalism , date dOctobe r 26 , 1987
. ...; . v;:. ; . ; ' Executiv e Orde r

12778 , Civi l Justic e Refonn'r.-C 1 : ; ; ';'- ; '
. Thi s propose drul e meet s th e applicabl e standard s o f Sectio n 2(b)(2 ) o f Executiv e Orde r

12778
. Lis t o f Subject s i n 4 4 CF RPar t 6 7

-. . Administrativ e practic e an d procedure , Floo dinsurance , Reportin g ari drecordkeepin g requirements
. Accordingly , 4 4 CF RPar t 6 7 i s propose dt o b e amende da s follows : PAR T67—[AMENDED ]

. l.,Th e authorit y citatio n for Par t 6 7 continue s t o reada s follows : Authority : 4 2 U.S.G.400 1 etseq. ; Reorganizatio n Plan No : 3 o f 1978 , 3 CFR, ,1978.Comp. , p..329;E.O
. 12127 , 44 F R19367 , 3 CFR, 197 9 Comp. , p . 376
. §67. 4 [Amended ] 2
. Th e table s publishe dunde r th e authorit y o f

§ 67. 4 ar e propose dt o b e amende da s follow s
State ,
Californi a v.:.;.;;.^.:;. '

••'. - ...,'• • •••• •

' • :

. .•:'

. >>:--.-- > ,-,;.

-

. ' •

' • ; •' - - '•.. City/town/count y

Sacrament o County ' (unincorporate d ; : areas).

. .':.-•:-. ' '•>.•.'••>l- '• '

• ';„.) h :..•••'.••,••:••. •- •:' ! •

. v^:X.,[-. ---;=•-' >; , -'•' ' '

. Sourc e of floodin g

Cosumne s Rive r

^ Cosumne s Rive rOverflo w •

_Nort h o f Lamber

t Roa d Locatio n

A t - confluenc e wit h Nort h For k Mokelumn e Rive r At th e Unio n Pacifi cRailroa d Approximatel y3,50 0 fee t upstrea m o f th e Unio n Pacifi cRailroad

. Approximatel y7,00 0 fee t upstrea m p f th e Unio n Pacifi cRailroad

. Approximatel y25 0 fee t upstrea m o f th e Unio n Pacifi cRailroa d Approximatel y1,00 0 fee t upstrea m o f Cor e Road

. #Dept h i n fee t abov e groun d 'Elevatio n i n fee t (NGVD ) Existin g "Non e
Non e Non e Non e Non e Non e Modifie d

*1 9
*1 9 *1 9 *2 0 *1 7 *1 8