P. 1



# OAR Box 1830 Prepped by Ollie Stewart



### Document

Number: 

# 145 ) IV-C-11 2 Docket Number: 

# A-87-1 1

Printed 11/13/2008 7:20:59 AM Sheet 145 of 232P. 2



## ^° s 

## % • 

## ~JJ -£. - 

## Hi . £ * S ' i 

# USB , UNITE D STATE S ENVIRONMENTA L PROTECTION AGENCY WASHINGTON

, D.C. 2046 0 

### AP R2 0 

### 198 8

OFFIC E O F AI RAN D RADIATIO N Honorabl e Jac k Davi s Hous e o f Representative s Washington , D . C . 2051 5 Dea r Mr . Davis : Thi s i s in respons e t o th e Marc h 24 , 198 8 lette r fro m yo u an d eigh t o f you r colleague s t o Administrato r Thoma s concerning EPA' s proposa l t o requir e onboar d refueling control s o n ne w gasoline-powere d car s an d trucks . Your concern s abou t the safet yo f onboar d system s ar e understandable , especiall y in ligh t o f pas t comment s b yth e Nationa l Highwa yTraffi c Safet yAdministratio n (NHTSA ) an d th e Nationa l Transportatio n Safet yBoar d (NTSB ) o n thi s issue . EP Ai s als o concerne d abou t an ypotentia l safet y implication s o f onboar d vapo r control s an d view s safet ya s a keyissu e in the rulemaking analysis . However , I believ e th e Agenc yha s entere d int o a proces s whic h wil l greatl yassis t u s in dealing wit h thi s issue . A s yo u know , thi s ha s bee n a ver ycomple x an

d controversia l proposal . B

yth e closing o f the commen t perio d o n Februar y11 , 1988 , EP

Aha d receive d a grea t dea l o f publi c commen t o n the topi c o f onboar d safety . We expec t tha t thes e comments , whic h we ar e no w evaluating , will ' bette r defin e th e specifi c safet y concern s an

d wil l provid e additiona l technica l informatio n an d studie s whic h can b e use d t o analyz e thes e concerns . Moreover , EPAwil l re-ope n the propose d onboar d rul e fo r publi c commen t whe n the Agenc yreceive s the comment s o f th e Secretary o f Transportatio n wit h respec t t o moto r vehicl e safety . I believ e thi s proces s wil l provid e EP Ath e necessaryinformatio n t o correctl ydea l wit h the safet yissu e an d addres s th e curren t uncertainties . Alon g thos e lines , EP Astaf f hav e complete d preliminary effort s t o desig n an d assembl e a prototyp e onboar d systemwhic h i s a straightforwar d modificatio n o f a curren t evaporativ e fue l system . M

yvie w i s tha t thi s desig n i s ver ysimpl e and , i n some ways , les s comple x tha n system s use d in man yexisting car s an d trucks . M

ystaf f i s i n the proces s o f presentin g thi s prototyp e hardwar e t o intereste d partie s fo r thei r comment . Obviously , we ar e mos t intereste d in the reaction s o f moto r vehicl e manufacturers , NHTS Aan d othe r safet yorganizations .P. 3



## ENV,B0 

# isr —

omR ALDOCKE

T SECT/O NP. 4

-2

- I n you r lette r yo u mentione d a n alternativ e t o refueling control s whic

hinclude d a numbe r o f othe r strategie s fo r hydrocarbo n reduction . Whil e th e contro l measure s mentione d d o represen t adde d hydrocarbo n reductio n benefits , the yd o no t addres s the issu e o f refueling emission s which , in ligh t o f the pressing nee d fo r ozon e reductions , i s a n importan t par t o f EPA' s overal l ozon e strategy . W e ar e alread yconsiderin g thes e othe r contro l measures , wher e i t i s appropriat e t o d o so . Than

k yo u fo r you r interes t i n th e onboar d vapo r recovery proposal . W e wil l plac e you r lette r in th e publi c docke t fo r the onboar d vapo r recoveryrulemaking s o tha t you r comment s wil l b e full yconsidere d a s w e procee d wit h th e nex t step o f th e rulemaking process . Sincerely ,

J pry*wcn yrOtte r .££___Assistan t Administrato r 1 fo r Ai r an

d Radiatio n cc : Docke t A-87-1 1P. 5

jfto sr

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## * A \ l Xfmfa " a UNITE D STATE S ENVIRONMENTA L PROTECTIO N AGENC Y V^iWip- /

WASHINGTON , D.C . 2046 0 

### APR 

### 2 0 1988

OFFIC E O F AI RAN D RADIATIO N Honorabl e Bo b Traxle r Hous e o f Representative s Washington , D . C . 2051 5 Dea r Mr . Traxler : Thi s i s in respons e t o th e Marc h 24 , 198 8 lette r fro m yo u an d eigh t o f you r colleague s t o Administrato r Thoma s concernin g EPA' s proposa l t o requir e onboar d refueling control s o n ne w gasoline-powere d car s an d trucks . You r concern s abou t the safet yo f onboar d system s ar e understandable , especiall y in ligh t o f pas t comment s b yth e Nationa l Highwa yTraffi c Safet yAdministratio n (NHTSA ) an d the Nationa l Transportatio n Safet yBoar d (NTSB ) o n thi s issue . EP Ai s als o concerne d abou t an ypotentia l safet y implication s o f onboar d vapo r control s an d view s safet ya s a ke yissu e in the rulemaking analysis . However , I believ e th e Agenc yha s entere d int o a proces s whic h wil l greatl yassis t u s in dealing wit h thi s issue . A s yo u know , thi s ha s bee n a ver ycomple x an

d controversia l proposal . B

ythe closing o f the commen t perio d o n February11 , 1988 , EP

Aha d receive d a grea t dea l o f publi c commen t o n th e topi c o f onboar d safety . W e expec t tha t thes e comments , whic h we ar e now evaluating , wil l bette r defin e th e specifi c safet y concern s an

d wil l provid e additiona l technica l informatio n an d studie s whic h can be used t o analyz e thes e concerns . Moreover , EPAwil l re-ope n the propose d onboar d rul e fo r publi c commen t whe n th e Agenc yreceive s th e comment s o f the Secretary o f Transportatio n wit h respec t t o moto r vehicl e safety . I believ e thi s proces s wil l provid e EP Ath e necessaryinformatio n t o correctl ydea l wit h the safet yissu e an d addres s th e curren t uncertainties . Alon g thos e lines , EP Astaf f hav e complete d preliminary effort s t o desig n an d assembl e a prototyp e onboar d system whic h i s a straightforwar d modificatio n o f a curren t evaporativ e fue l system . M

yvie w i s tha t thi s desig n i s ver ysimpl e and , i n som e ways , les s comple x than system s use d in man yexisting car s an d trucks . M

ystaf f i s in the proces s o f presentin g thi s prototyp e hardwar e t o intereste d partie s fo r thei r comment . Obviously , w

e ar e mos t intereste d in th e reaction s o f moto r vehicl e manufacturers , NHTS Aan d othe r safet yorganizations .P. 6

-2 - In you r letter yo u mentione d a n alternativ e t o refueling control s whic

hinclude d a numbe r o f othe r strategie s fo r hydrocarbo n reduction . Whil e the contro l measure s mentione d d o represen t adde d hydrocarbo n reductio n benefits , theyd o no t addres s the issu e o f refueling emission s which , in ligh t o f the pressing nee d fo r ozon e reductions , i s a n importan t par t o f EPA' s overal l ozon e strategy . W e ar e alread yconsiderin g thes e othe r contro l measures , wher e i t i s appropriat e t o d o so . Than

k yo u fo r you r interes t in the onboar d vapo r recovery proposal . W e wil l plac e you r lette r in the publi c docke t fo r the onboar d vapo r recoveryrulemaking s o tha t you r comment s wil l be full yconsidere d a s w e procee d wit h the nex t step o f th e rulemaking process . Sincerely , Cfc-fij/ J Potte r ssistan t

Administrato r fo r Ai r an dRadiatio n c c : Docke t

A-87-1 1P. 7

$901 8 UNITE D STATE S ENVIRONMENTA L PROTECTIO N AGENC Y \*m&f WASHINGTON , D.C . 2046 0 

### APR 

### 2 0 - 98 8 '^i PRO'* 0

OFFIC E O F AI RAN D RADIATIO N Honorabl e Bil l Schuett e Hous e o f Representative s Washington , D . C . 2051 5 Dea r Mr . Schuette : Thi s i s in respons e t o the Marc h 24 , 198 8 lette r fro m yo u an d eigh t o f you r colleague s t o Administrato r Thoma s concerning EPA' s proposa l t o requir e onboar d refueling control s o n ne w gasoline-powere d car s an d trucks . You r concern s abou t the safet yo f onboar d system s ar e understandable , especiall y in ligh t o f pas t comment s b yth e Nationa l Highwa yTraffi c Safet yAdministratio n (NHTSA ) an d the Nationa l Transportatio n Safet yBoar d (NTSB ) o n thi s issue . EP Ai s als o concerne d abou t an ypotentia l safet y implication s o f onboar d vapo r control s an d view s safet ya s a keyissu e in the rulemaking analysis . However , I believ e the Agenc yha s entere d int o a proces s whic h wil l greatl yassis t u s in dealing wit h thi s issue . A s yo u know , thi s ha s bee n a ver ycomple x an

d controversia l proposal . B

ythe closing o f the commen t perio d o n Februar y11 , 1988 , EP

Aha d receive d a grea t dea l o f publi c commen t o n the topi c o f onboar d safety . W e expec t tha t thes e comments , whic h w e ar e now evaluating , wil l bette r defin e the specifi c safet y concern s an

d wil l provid e additiona l technica l informatio n an d studie s whic h can be use d t o analyz e thes e concerns . Moreover , EP

Awil l re-ope n th

e propose d onboar d rul e fo r publi c commen t whe n the Agenc yreceive s the comment s o f the Secretary o f Transportatio n wit h respec t t o moto r vehicl e safety . I believ e thi s proces s wil l provid e EP Ath e necessaryinformatio n t o correctl ydea l wit h the safet yissu e an d addres s th e curren t uncertainties . Along thos e lines , EP Astaf f hav e complete d preliminary effort s t o design an d assembl e a prototyp e onboar d systemwhic h i s a straightforwar d modificatio n o f a curren t evaporativ e fue l system . M

yvie w i s tha t thi s design i s ver ysimpl e and , in som e ways , les s comple x than system s use d in man yexisting car s an d trucks . M

ystaf f i s in th e proces s o f presentin g thi s prototyp e hardwar e t o intereste d partie s fo r thei r comment . Obviously , w

e ar e mos t intereste d in the reaction s o f moto r vehicl e manufacturers , NHTS Aan d othe r safet yorganizations .P. 8

-2

- I n you r lette r yo u mentione d a n alternativ e t o refueling control s whic h include d a numbe r o f othe r strategie s fo r hydrocarbo n reduction . Whil e th e contro l measure s mentione d d o represen t adde d hydrocarbo n reductio n benefits , theyd o no t addres s the issu e o f refueling emission s which , i n ligh t o f the pressing nee d fo r ozon e reductions , i s a n importan t par t o f EPA' s overal l ozon e strategy . W e ar e alread yconsidering thes e othe r contro l measures , wher e i t i s appropriat e t o d o so . Than

k yo u fo r you r interes t i n th e onboar d vapo r recover y proposal . W e wil l plac e you r lette r i n the publi c docke t fo r the onboar d vapo r recover yrulemaking s o tha t you r comment s wil l be full yconsidere d a s w e procee d wit h the nex t step o f th e rulemaking process . Sincerely ,



### >tte r isistan t Administrato r fo r Ai r an dRadiatio n cc : Docke t

A-87-1 1P. 9

r* * 0 J~L 

# KWJ i S UNITE D STATE S ENVIRONMENTA L PROTECTION AGENCY » -.— * * WASHINGTON , D.C. 2046 0 

### AP R 

### 2 0 1988

OFFIC E O F AI RAN D RADIATIO N Honorabl e Ha l Dau

b Hous e o f Representative s Washington , D . C . 2051 5 Dea r Mr . Daub : Thi s i s in respons e t o the Marc h 24 , 198 8 lette r fro m yo u an d eigh t o f you r colleague s t o Administrato r Thoma s concernin g EPA' s proposa l t o requir e onboar d refueling control s o n ne w gasoline-powere d car s an d trucks . Your concern s abou t the safet yo f onboar d system s ar e understandable , especiall y in ligh t o f pas t comment s b ythe Nationa l Highwa yTraffi c Safet yAdministratio n (NHTSA ) an d th e Nationa l Transportatio n Safet yBoar d (NTSB ) o n thi s issue . EP Ai s als o concerne d abou t an ypotentia l safet y implication s o f onboar d vapo r control s an d view s safet ya s a keyissu e i n th e rulemaking analysis . However , I believ e th e Agenc yha s entere d int o a proces s whic h wil l greatl yassis t u s in dealing wit h thi s issue . A s yo u know , thi s ha s bee n a ver ycomple x an

d controversia l proposal . B

ythe closing o f the commen t perio d o n Februar y11 , 1988 , EP

Aha d receive d a grea t dea l o f publi c commen t o n the topi c o f onboar d safety . W e expec t tha t thes e comments , whic h we ar e now evaluating , wil l bette r defin e the specifi c safet y concern s an

d wil l provid e additiona l technica l informatio n an d studie s whic h can be use d t o analyz e thes e concerns . Moreover , EP

Awil l re-ope n the propose d onboar d rul e fo r publi c commen t whe n the Agenc yreceive s the comment s o f the Secretary o f Transportatio n wit h respec t t o moto r vehicl e safety . I believ e thi s proces s wil l provid e EP Ath e necessaryinformatio n t o correctl ydea l wit h th e safet yissu e an

d addres s the curren t uncertainties . Along thos e lines , EP Astaf f hav e complete d preliminary effort s t o desig n an d assembl e a prototyp e onboar d systemwhic h i s a straightforwar d modificatio n o f a curren t evaporativ e fue l system . M

yvie w i s tha t thi s desig n i s ver ysimpl e and , in some ways , les s comple x tha n system s use d i n man yexisting car s an d trucks . M

ystaf f i s i n the proces s o f presentin g thi s prototyp e hardwar e t o intereste d partie s fo r thei r comment . Obviously , w

e ar e mos t intereste d in th e reaction s o f moto r vehicl e manufacturers , NHTS Aan d othe r safet yorganizations .P.1 0

-2

- I n you r lette r yo u mentione d a n alternativ e t o refueling control s whic h include d a numbe r o f othe r strategie s fo r hydrocarbo n reduction . Whil e th e contro l measure s mentione d d o represen t adde d hydrocarbo n reductio n benefits , theyd o no t addres s the issu e o f refueling emission s which , in ligh t o f th e pressing nee d fo r ozon e reductions , i s a n importan t par t o f EPA' s overal l ozon e strategy . W e ar e alread yconsiderin g thes e othe r contro l measures , wher e i t i s appropriat e t o d o so . Thank yo u fo r you r interes t i n the onboar d vapo r recovery proposal . W e wil l plac e you r lette r in the publi c docke t fo r the onboar d vapo r recover yrulemaking s o tha t you r comment s wil l be full yconsidere d a s w e procee d wit h th e nex t ste p o f th e rulemaking process . Sincerely ,

sf<L- A Cfa-T

g "Potte r ssistan t Administrato r fo r Ai r an

d Radiatio n cc : Docke t A-87-1 1P.1 1



### f?°J""*,. 

# s*b * mm . i I ^W* 7 3 UNITE D STATE S ENVIRONMENTA L PROTECTIO N AGENC Y \-*W» > WASHINGTON , D.C . 2046 0 

### AP R 2 0 I98 8

OFFIC E O F AI RAN D RADIATIO N Honorabl e Jac k Buechne r Hous e o f Representative s Washington , D . C . 2051 5 Dea r Mr . Buechner : Thi s i s in respons e t o th e Marc h 24 , 198 8 lette r fro m yo u an d eigh t o f you r colleague s t o Administrato r Thoma s concerning EPA' s proposa l t o requir e onboar d refueling control s o n ne w gasoline-powere d car s an d trucks . Your concern s abou t the safet yo f onboar d system s ar e understandable , especiall y in ligh t o f pas t comment s b yth e Nationa l Highwa yTraffi c Safet yAdministratio n (NHTSA ) an d the Nationa l Transportatio n Safet yBoar d (NTSB ) o n thi s issue . EP Ai s als o concerne d abou t an ypotentia l safet y implication s o f onboar d vapo r control s an d view s safet ya s a ke yissu e in the rulemaking analysis . However , I believ e th e Agencyha s entere d int o a proces s whic h wil l greatl yassis t u s in dealing wit h thi s issue . A s yo u know , thi s ha s bee n a ver ycomple x an

d controversia l proposal . B

yth e closing o f the commen t perio d o n Februar y11 , 1988 , EP

Ahad receive d a grea t dea l o f publi c commen t o n the topi c o f onboar d safety . W e expec t tha t thes e comments , whic h w e ar e no w evaluating , wil l bette r defin e th e specifi c safet y concern s an

d wil l provid e additiona l technica l informatio n an d studie s whic h can be used t o analyz e thes e concerns . Moreover , EPAwil l re-ope n th e propose d onboar d rul e fo r publi c commen t whe n the Agenc yreceive s th e comment s o f th e Secretary o f Transportatio n wit h respec t t o moto r vehicl e safety . I believ e thi s proces s wil l provid e EP Ath e necessaryinformatio n t o correctl ydea l wit h th e safet yissu e an d addres s th e curren t uncertainties . Along thos e lines , EP Astaf f hav e complete d preliminary effort s t o desig n an d assembl e a prototyp e onboar d system whic h i s a straightforwar d modificatio n o f a curren t evaporativ e fue l system . M

yvie w i s tha t thi s desig n i s ver ysimpl e and , i n some ways , les s comple x tha n system s use d in man yexisting car s an d trucks . M

ystaf f i s in the proces s o f presentin g thi s prototyp e hardwar e t o intereste d partie s fo r thei r comment . Obviously , w

e ar e mos t intereste d i n th e reaction s o f moto r vehicl e manufacturers , NHTS Aan d othe r safet yorganizations .P.1 2

-2

- I n you r lette r yo u mentione d a n alternativ e t o refueling control s whic

hinclude d a numbe r o f othe r strategie s fo r hydrocarbon , reduction . Whil e th e contro l measure s mentione d d o represen t adde d hydrocarbo n reductio n benefits , theyd o no t addres s th e issu e o f refueling emission s which , i n ligh t o f th e pressing nee d fo r ozon e reductions , i s a n importan t par t o f EPA' s overal l ozon e strategy . W e ar e alread yconsidering thes e othe r contro l measures , wher e i t i s appropriat e t o d o so . Thank yo u fo r you r interes t in th e onboar d vapo r recovery proposal . W e wil l plac e you r lette r in th e publi c docke t fo r the onboar d vapo r recoveryrulemaking s o tha t you r comment s wil l b e full yconsidere d a s w e procee d wit h th e nex t ste p o f the rulemaking process . Sincerely ,

'Crai/ g Potte r ssistan t Administrato r fo r Ai r an

d Radiatio n cc : Docke t A-87-1 1P.1 3

^ t0Sr * » > 

## A ^J« 7 3 UNITE D STATE S ENVIRONMENTA L PROTECTIO N AGENC Y \**J|4*\ /

WASHINGTON, D.C . 2046 0 

### AP R 2 0 I98 8

OFFIC E O F AI RAN D RADIATIO N Honorabl e To

mDela y Hous e o f Representative s Washington , D . C . 2051 5 Dea r Mr . Delay : Thi s i s in respons e t o the Marc h 24 , 198 8 lette r fro m yo u an d eigh t o f you r colleague s t o Administrato r Thoma s concerning EPA' s proposa l t o requir e onboar d refueling control s o n ne w gasoline-powere d car s an d trucks . Your concern s abou t the safet yo f onboar d system s ar e understandable , especiall y i n ligh t o f pas t comment s b yth e Nationa l Highwa yTraffi c Safet yAdministratio n (NHTSA ) an d th e Nationa l Transportatio n Safet yBoar d (NTSB ) o n thi s issue . EP Ai s als o concerne d abou t an ypotentia l safet y implication s o f onboar d vapo r control s an d view s safet ya s a keyissu e i

n the rulemaking analysis . However , I believ e th e Agenc yha s entere d int o a proces s whic h wil l greatl yassis t u s in dealing wit h thi s issue . A s yo u know , thi s ha s bee n a ver ycomple x an

d controversia l proposal . B

ythe closing o f the commen t perio d o n Februar y11 , 1988 , EP

Aha d receive d a grea t dea l o f publi c commen t o n the topi c o f onboar d safety . W e expec t tha t thes e comments , whic h we ar e no w evaluating , wil l bette r defin e th e specifi c safet y concern s an

d wil l provid e additiona l technica l informatio n an d studie s whic h can be use d t o analyz e thes e concerns . Moreover , EPAwil l re-ope n the propose d onboar d rul e fo r publi c commen t whe n th e Agenc yreceive s the comment s o f the Secretary o f Transportatio n wit h respec t t o moto r vehicl e safety . I believ e thi s proces s wil l provid e EP Ath e necessaryinformatio n t o correctl ydea l wit h the safet yissu e an d addres s th e curren t uncertainties . Alon g thos e lines , EP Astaf f hav e complete d preliminary effort s t o desig n an d assembl e a prototyp e onboar d systemwhic h i s a straightforwar d modificatio n o f a curren t evaporativ e fue l system . M

yvie w i s tha t thi s design i s ver ysimpl e and , i n some ways , les s comple x tha n system s use d in man yexisting car s an d trucks . M

ystaf f i s i n th

e proces s o f presentin g thi s prototyp e hardwar e t o intereste d partie s fo r thei r comment . Obviously , w

e ar e mos t intereste d in th e reaction s o f moto r vehicl e manufacturers , NHTS Aan d othe r safet yorganizations .P.1 4

-2

- I n you r lette r yo u mentione d a n alternativ e t b refueling control s whic h include d a numbe r o f othe r strategie s fo r hydrocarbo n reduction . Whil e the contro l measure s mentione d d o represen t adde d hydrocarbo n reductio n benefits , theyd o no t addres s the issu e o f refueling emission s which , in ligh t o f the pressing nee d fo r ozon e reductions , i s a n importan t par t o f EPA' s overal l ozon e strategy . W e ar e alread yconsidering thes e othe r contro l measures , wher e i t i s appropriat e t o d o so . Than

k yo u fo r you r interes t in th e onboar d vapo r recovery proposal . W e wil l plac e you r lette r in the publi c docke t fo r the onboar d vapo r recoveryrulemaking s o tha t you r comment s wil l b e full yconsidere d a s w e procee d wit h th e nex t ste p o f th e rulemaking process . Sincerely ,

cc : Docke t A-87-1 1 Cra# § Potte r Assistan t Administrato r fo r Ai r an

d Radiatio nP.1 5

» __ ! ^&ft « UNITE D STATE S ENVIRONMENTA L PROTECTIO N AGENC Y \4m+J WASHINGTON, D.C . 2046 0

* l PRO ^ 

### AP R2 0 I98 8

OFFIC E O F AI RAN D RADIATIO N Honorabl e Gu

yVande r Jag t Hous e o f Representative s Washington , D . C . 2051 5 Dea r Mr . Vande r Jagt : Thi s i s in respons e t o the Marc h 24 , 198 8 lette r fro m yo u an d eigh t o f you r colleague s t o Administrato r Thoma s concerning EPA' s proposa l t o requir e onboar d refueling control s o n ne w gasoline-powere d car s an d trucks . Your concern s abou t the safet yo f onboar d system s ar e understandable , especiall y in ligh t o f pas t comment s b yth e Nationa l Highwa yTraffi c Safet yAdministratio n (NHTSA ) an d th e Nationa l Transportatio n Safet yBoard (NTSB ) o n thi s issue . EP Ai s als o concerne d abou t an ypotentia l safet y implication s o f onboar d vapo r control s an d view s safet ya s a keyissu e in the rulemaking analysis . However , I believ e th e Agenc yha s entere d int o a proces s whic h wil l greatl yassis t u s i n dealing wit h thi s issue . A s yo u know , thi s ha s bee n a ver ycomple x an

d controversia l proposal . B

ythe closing o f th e commen t perio d o n Februar y11 , 1988 , EP

Ahad receive d a grea t dea l o f publi c commen t o n the topi c o f onboar d safety . W e expec t tha t thes e comments , whic h we ar e now evaluating , wil l bette r defin e th e specifi c safet y concern s an

d wil l provid e additiona l technica l informatio n an d studie s whic h can be use d t o analyz e thes e concerns . Moreover , EPAwil l re-ope n th e propose d onboar d rul e fo r publi c commen t whe n the Agenc yreceive s th e comment s o f the Secretary o f Transportatio n wit h respec t t o moto r vehicl e safety . I believ e thi s proces s wil l provid e EP Ath e necessaryinformatio n t o correctl ydea l wit h the safet yissu e an d addres s th e curren t uncertainties . Alon g thos e lines , EP Astaf f hav e complete d preliminary effort s t o desig n an d assembl e a prototyp e onboar d systemwhic h i s a straightforwar d modificatio n o f a curren t evaporativ e fue l system . M

yvie w i s tha t thi s desig n i s ver ysimpl e and , i n some ways , les s comple x tha n system s use d in man yexisting car s an d trucks . M

ystaf f i s i n the proces s o f presentin g thi s prototyp e hardwar e t o intereste d partie s fo r thei r comment . Obviously , w

e ar e mos t intereste d in th e reaction s o f moto r vehicl e manufacturers , NHTS Aan d othe r safet yorganizations .P.1 6

-2 - I n you r letter yo u mentione d a n alternativ e t o refueling control s whic

hinclude d a numbe r o f othe r strategie s fo r hydrocarbo n reduction . Whil e the contro l measure s mentione d d o represen t adde d hydrocarbo n reductio n benefits , theyd o no t addres s the issu e o f refueling emission s which , i n ligh t o f the pressing nee d fo r ozon e reductions , i s a n importan t par t o f EPA' s overal l ozon e strategy . W e ar e alread yconsiderin g thes e othe r contro l measures , wher e i t i s appropriat e t o d o so . Thank yo u fo r you r interes t i n the onboar d vapo r recovery proposal . We wil l plac e you r lette r in th e publi c docke t fo r th e onboar d vapo r recoveryrulemaking s o tha t you r comment s wil l b e full yconsidere d a s w e procee d wit h th e nex t step o f th e rulemaking process . Sincerely ,

Craf g Potte r ssistan t Administrato r fo r Ai r an

d Radiatio n cc : Docke t A-87-1 1P.1 7



### £ £ 3 4 

# SK 3 UNITE D STATE S ENVIRONMENTA L PROTECTION AGENCY WASHINGTON

, D.C . 2046 0

* PRO^ V AP R 2 0 I98 C

OFFIC E O F AI RAN D RADIATIO N Honorabl e Dan Coat s Hous e o f Representative s Washington , D . C . 2051 5 Dea r Mr . Coats : Thi s i s in respons e t o th e Marc h 24 , 198 8 lette r fro m yo u an d eigh t o f you r colleague s t o Administrato r Thoma s concerning EPA' s proposa l t o requir e onboar d refueling control s o n ne w gasoline-powere d car s an d trucks . You r concern s abou t the safet yo f onboar d system s ar e understandable , especiall y in ligh t o f pas t comment s b yth e Nationa l Highwa yTraffi c Safet yAdministratio n (NHTSA ) an d th e Nationa l Transportatio n Safet yBoar d (NTSB ) o n thi s issue . EP Ai s als o concerne d abou t an ypotentia l safet y implication s o f onboar d vapo r control s an d view s safet ya s a keyissu e in the rulemaking analysis . However , I believ e th e Agenc yha s entere d int o a proces s whic h wil l greatl yassis t u s in dealing wit h thi s issue . A s yo u know , thi s ha s bee n a ver ycomple x an

d controversia l proposal . B

ythe closing o f th e commen t perio d o n February11 , 1988 , EP

Ahad receive d a grea t dea l o f publi c commen t o n th e topi c o f onboar d safety . W e expec t tha t thes e comments , whic h we ar e now evaluating , wil l bette r defin e the specifi c safet y concern s an

d wil l provid e additiona l technica l informatio n an d studie s whic h can be use d t o analyz e thes e concerns . Moreover , EP

Awil l re-ope n the propose d onboar d rul e fo r publi c commen t whe n the Agenc yreceive s th e comment s o f the Secretary o f Transportatio n wit h respec t t o moto r vehicl e safety . I believ e thi s proces s wil l provid e EP Ath e necessaryinformatio n t o correctl ydea l wit h th e safet yissu e an d addres s th e curren t uncertainties . Alon g thos e lines , EP Astaf f hav e complete d preliminary effort s t o desig n an d assembl e a prototyp e onboar d systemwhic h i s a straightforwar d modificatio n o f a curren t evaporativ e fue l system . M

yvie w i s tha t thi s desig n i s ver ysimpl e and , i n some ways , les s comple x than system s use d in man yexisting car s an d trucks . M

ystaf f i s i n th

e proces s o f presentin g thi s prototyp e hardwar e t o intereste d partie s fo r thei r comment . Obviously , we ar e mos t intereste d in the reaction s o f moto r vehicl e manufacturers , NHTS Aan d othe r safet yorganizations .P.1 8

-2

- I n you r lette r yo u mentione d a n alternativ e t o refueling control s whic

hinclude d a numbe r o f othe r strategie s fo r hydrocarbo n reduction . Whil e th e contro l measure s mentione d d o represen t adde d hydrocarbo n reductio n benefits , theyd o no t addres s the issu e o f refueling emission s which , i n ligh t o f th e pressing nee d fo r ozon e reductions , i s a n importan t par t o f EPA' s overal l ozon e strategy . W e ar e alread yconsidering thes e othe r contro l measures , wher e i t i s appropriat e t o d o so . Than

k yo u fo r you r interes t in the onboar d vapo r recovery proposal . W e wil l plac e you r lette r in the publi c docke t fo r th e onboar d vapo r recoveryrulemaking s o tha t you r comment s wil l be full yconsidere d a s w e procee d wit h th e nex t ste p o f th e rulemaking process . Sincerely ,



### ^ ja. /Cra-lg^Totte r jfbb*—Assistant

Administrato r fo r Ai r an dRadiatio n cc : Docke t

A-87-1 1P.1 9

UNITE D STATE S ENVIRONMENTA L PROTECTION AGENC Y

WASHINGTON

, D.C . 2046 0 

### AP R 2 0 I98 8

OFFIC E O F AI RAN D RADIATIO N Honorabl e Bo b Car r Hous e o f Representative s Washington , D . C . 2051 5 Dea r Mr . Carr : Thi s i s in respons e t o th e Marc h 24 , 198 8 lette r fro m yo u an d eigh t o f you r colleague s t o Administrato r Thoma s concerning EPA' s proposa l t o requir e onboar d refueling control s o n ne w gasoline-powere d car s an d trucks . Your concern s abou t the safet yo f onboar d system s ar e understandable , especiall y in ligh t o f pas t comment s b yth e Nationa l HighwayTraffi c Safet yAdministratio n (NHTSA ) an d th e Nationa l Transportatio n Safet yBoar d (NTSB ) o n thi s issue . EP Ai s als o concerne d abou t an ypotentia l safet y implication s o f onboar d vapo r control s an d view s safet ya s a ke yissu e in the rulemaking analysis . However , I believ e th e Agenc yha s entere d int o a proces s whic h wil l greatl yassis t u s in dealing wit h thi s issue . A s yo u know , thi s ha s bee n a ver ycomple x an

d controversia l proposal . B

ythe closing o f the commen t perio d o n Februar y11 , 1988 , EP

Ahad receive d a grea t dea l o f publi c commen t o n th e topi c o f onboar d safety . W e expec t tha t thes e comments , whic h w e ar e now evaluating , wil l bette r defin e the specifi c safet y concern s an

d wil l provid e additiona l technica l informatio n an d studie s whic h can be use d t o analyz e "thes e concerns . Moreover , EPAwil l re-ope n th e propose d onboar d rul e fo r publi c commen t whe n the Agenc yreceive s the comment s o f the Secretary o f Transportatio n wit h respec t t o moto r vehicl e safety . I believ e thi s proces s wil l provid e EP Ath e necessaryinformatio n t o correctl ydea l wit h the safet yissu e an d addres s the curren t uncertainties . Alon g thos e lines , EP Astaf f hav e complete d preliminary effort s t o desig n an d assembl e a prototyp e onboar d systemwhic h i s a straightforwar d modificatio n o f a curren t evaporativ e fue l system . M

yvie w i s tha t thi s desig n i s ver ysimpl e and , i n some ways , les s comple x tha n system s use d i n man yexisting car s an d trucks . M

ystaf f i s in th

e proces s o f presentin g thi s prototyp e hardwar e t o intereste d partie s fo r thei r comment . Obviously , w

e ar e mos t intereste d in the reaction s o f moto r vehicl e manufacturers , NHTS Aan d othe r safet yorganizations .P.2 0

-2

- I n you r lette r yo u mentione d a n alternativ e t o refueling control s whic

hinclude d a numbe r o f othe r strategie s fo r hydrocarbo n reduction . Whil e th e contro l measure s mentione d d o represen t adde d hydrocarbo n reductio n benefits , the yd o no t addres s the issu e o f refueling emission s which , i n ligh t o f th e pressing need fo r ozon e reductions , i s a n importan t par t o f EPA' s overal l ozon e strategy . W e ar e alread yconsiderin g thes e othe r contro l measures , wher e i t i s appropriat e t o d o so . Than

k yo u fo r you r interes t in the onboar d vapo r recovery proposal . W e wil l plac e you r lette r in th e publi c docke t fo r the onboar d vapo r recover yrulemaking s o tha t you r comment s wil l b e full yconsidere d a s w e procee d wit h th e nex t step o f th e rulemaking process. ' Sincerely ,

g Potte r ssistan t Administrato r fo r Ai r an

d Radiatio n cc : Docke t A-87-1 1