# OAR Box 1112 Prepped by RyanDugan



### Document

Number: 

# 19 ) II-B-8
Docket Number: 

# A-83-2 2

Printed 4/16/2008 9:12:06

AM i

Sheet 19 of 97 p. 1P. 2

Op* 6081 ""*

. UNITE D STATE S ENVIRONMENTA L PROTECTIO N AGENC Y Offic e o f Ai rQualit yPlannin g an d Standard s / Researc h Triangl e Park , Nort h Carolin a 2771 1 

### OC T2 2 198 5

MEMORANDU M SUBJECT : Compariso no f Fou r Alternativ e Lea dAi r Qualit y Standard s Usin g Modelle dDat a a t a Secondary LeadSmelte r an

da Batter y Plan t y < . ~\ '// ' '/'Ay 

### FROM : Willia

m F . Hunt , Jr . / • Ub*-vJ - /^"'* ' fChief , Dat a Analysi s Sectio n(MD-14 ) ' TO : Joh

nHaines , Chie f Standard s Developmen t Sectio nB (MD-12 ) Modelle dquarterl y

an dmonthl y averag e lea ddat a wer e take nfro m th e SA I Report , A

nEvaluatio no f Alternativ e Form s o f th e Nationa l Ambien t Ai r Qualit y

Standar dfo r Lea dt o compar e fou r alternativ e form s o f th e leadstandard : Optio n1 . Maximu

m quarterl y

(monthly ) averag e - Computationally , yo u choos e th e highes t quarterly/monthl y averag e ove r a 3-yea r period . Optio n2 . Expecte dmaximu m calenda r quarte r (month ) - Computationally , yo ucomput e th e averag e ove r 3 year s fo r eac hcalenda r quarter/monthl y

averag e (i.e . averag e al l th e firs t quarters , al l th e secondquarters , etc . o r al l th e Januarys , Februarys , etc.) . Optio n3 . Expecte dmaximu m quarte r (month ) - Computationally , yo u choos e th e maximu

m quarterl y

o r monthl y

averag e i neac h calenda r yea r an

daverag e thes e maximu

m quarter s o r months . Optio n4 . Expecte dhighes t N quarter s (months ) - Computationally , thi s give s th e sam

e answe r a s optio n3 , unles s a singl e yea r contain s tw

o o r mor e o f th e 3 highes t quarters . The modelle ddat a wer e take nfro m Appendice s A , B , C , andD o f th e repor t fo r every

day monitoring . Th e dat a canbe foun do npag e A- 2 fo r quarterl y average s arounda secondar y lea dsmelter , o

npag e B- 2 fo r monthl y average s arounda secondary lea dsmelter , on pag e C- 2 fo r quarterl y average s arounda lea dbattery plan t an dpag e D- 2 fo r monthl y

average sP. 3

aroun da lea d batter y plant . Th e meteorologica l dat a bas e fo r th e lea d smelte r cas e covere dthe year s 196 4 an d197 4 throug h1978 , whil e th e meteorologica l dat a bas e fo r th e lea dbatter y plan t covere dth e year s 196 5 throug h1971 . W e hav e assume dthat , i f model s ar e t o b e use di ndeterminin g possibl e contro l actions , th e modelin g woul d be don e o nanevery

da y basis . Tabl e 1 compare s th e modelle dquarterl y an dmonthl y

average s aroundth e secondar y

lea d smelte r fo r eac ho f th e 3-yea r period s o f meteorologica l dat a endin g i nth e year s 1975 , 1976 , 1977 , an d1978 . Similarly , Tabl e 2 compare s th e modelle dquarterl y an dmonthl y

dat a a t th e leadbatter y

plan t fo r eac ho f th e 3-yea r period s o f meteorologica l dat a endin g i nth e year s 1967 , 1968 , 1969 , 1970 , an d1971 . I nbot htables , tw

o additiona l column s hav e bee nadded . Th e firs t colum ni s th e average s o f al l 3-yea r perio ddesig nvalue s an di s th e principa l focu s o f thi s mem o fo r comparin g th e fou r alternativ e desig n values ; The las t colum ndescribe s th e percen t differenc e betwee nth e mos t stringen t for

m o f th e standar d- th e maximu m quarte r o r mont hove r th e 3-yea r perio d(Option1 ) an dth e othe r thre e form s o f th e standard . OBSERVATION S A s woul d b e expected , th e nex t mos t stringen t form s o f th e ai r qualit y standard s ar e i nran k order : Optio n4 . th e expecte dhighes t N quarter s o r months , Optio n3 . th e expecte dmaximu m quarte r (month) , Optio n2 . th e expecte dmaximu m calenda r quarte r (month) . I wil l b e happ

y t o discus s an

y question s yo umigh t have regardin g this memo . Attachment s
cc : R . Rhoad s (MD-14 ) R . Neliga n(MD-14 ) J . Cohe n(MD-12 ) D . Sledg e (MD-12 ) R . Faor o (MD-14 ) N . Frank (MD-14 )P. 4

Tabl e 1

. Compariso n o f Fou rAlternativ e Standar d Desig n Value s

o f Modelle d Quarterl yan d Monthl yAverage s Aroun d a Secondar yLea d Smelte r

^trarterl y Desig n Valu e Max

. Quarterl yAvg

. Exp

. Max

. Cal

. Qtr

. Exp

. Max

. Qtr

. Exp

. Highes t 3 Qtrs

. 3-Yea rRecor d Endin g i n 197 5 197 6 197 7 197 8 Averag e o f al l % Reductio n i n 3-Yea rPeriod s Desig n Valu e 4.4 2 3.4 9 3.4 9 3.8 0 4.4 2 4.0 4 4.0 4 4.0 4 4.4 2 3.8 8 3.9 2 3.9 2 3.7 2 3.5 0 3.5 4 3.6 1 4.2 5

3.7 3 3.7 5 3.8 4 0

-14 % -13 % -11 %

Monthl y Desig n Valu e Max

. Monthl yAvg

. Exp

. Max

. Cal

. Mont h Exp

. Max

. Mont h Exp

. Highes t 3 Month s 5.0 7 5.0 7 5.0 7 4.8 6 3.9 5 4.5 5 4.5 0 4.1 2 4.3 8 4.8 2 4.7 3 4.5 5 4.6 6 4.8 2 4.8 1 4.7 1 5.0 2 4.2 8 4.6 2 4.7 5 0

-17 % -9 % -6 %P. 5

Tabl e 2 . Compariso no f Fou r Alternativ e Standar dDesig nValue s

o f Modelle dQuarterl y and Monthl y

Average s Arounda Lea dBatter y

P l an t

Quarterl y Desig n Valu e
Max

. Quarterl yAvg

. Exp

. Max

. Cal

. Qtr

. Exp

. Max

. Qtr

. Exp

. Highes t 3 Qtrs

.
Monthl y Desig n Valu e 3-Yea rRecor d Endin g 196 7 196 8 196 9 197 0
0.7 3 0.6 3 0.6 7 0.7 0 0.6 8 0.6 4 0.6 4 0.6 4 0.8 5 0.7 1 0.7 1 0.7 1 0.8 5 0.7 2 0.7 2 0.7 2 i n 197 1
0.8 5 0.7 0 0.7 0 0.7 1 Averag e o f 3-Yea rPe n
0.7 9 0.6 8 0.6 9 0.7 0 a l l od s % Reductio n i n Desig n Valu e
0 -16 % -14 % -13 %

Max . Monthl y

Avg . 1.0 3 1.0 3 1.0 8 1.0 8 1.0 8 Exp . Max . Cal . Mont h0.9 1 0.9 0 0.8 5 0.9 0 0.8 1 Exp . Max . Mont h0.9 1 0.9 0 0.9 2 0.9 0 0.9 6 Exp . Highes t 3 Month s 0.9 4 0.9 3 0.9 5 0.9 3 0.9 7 1.0 6 0.8 7 0.9 2 0.9 4 0

-22 % -15 % -13 %