P. 1 

# OAR Box 1147 Prepped by Ollie Stewart



### Document

Number: 

# 16DIV-E-3 4 Docket Number: 

# A-87-1 1

Printed 4/22/20082:42:56

PM Sheet 161 of 242P. 2
i> -tW- \ UNITE D STATE S ENVIRONMENTA L PROTECTIO N AGENC Y AN N ARBOR . MICHIGA N 4810 5 OFFIC E O F AI R AN D RADIATIO N MAR 3 I mo.
MEMORANDU

M SUBJECT :
FROM :
TO : Briefing t o the Staf f o f the Environmen t an d Publi c Work s Committe e Cheste r J . France , Chra r Standard s Developmen ' Th e Recor d
O n Marc h 17 , 1988 , EPAstaf f gav e a briefing t o severa l staffer s o f the Senate' s Environmen t an d Publi c Work s Committee . Th e briefing wa s requeste d b ythe committe e staf f an d mainl yfocuse d on refueling emissions . Th e topic s covere d include d th

e nee d fo r contro l o f refueling emissions , refueling contro l options , an d onboar d hardwar e designs . Acop yo f th e overhead s use d a t th e briefing ar e attached . I n addition , EP A answere d severa l question s concerning othe r mobil e sourc e issue s suc h a s inspectio n an d maintenanc e programs , useful-lif e an d vehicl e emissio n standards . Attachmen tP. 3



# Why Contro l Refuelin qEmissions ? Provide s a two percen t VO C reductio n Few remainin gVO C contro l strategie s ca nprovid e mor e reductio n Reductio nca nb e achieve dcos t effectivel y whe ncompare d t o othe r availabl e contro l alternative s Reduce s exposur e t o toxi c vapor s durin grefuelin g- benzen e i s a knownhuma ncarcinoge nandgasolin e vapor s i n genera l ar e a concer n Ou r annua l inciden t reductio nestimate s for controllin g refuelin gemission s ar e 4 wit hjus t benzene , 1 4 i f benzen e an d>C 6 ar e included , an

d4 2 i f benzen e an

dal l ga s vapor s ar e include d

### T " P. 4 

# Refuelin gOption s Onboar d 0 

# 4 9 - stat e or nationwid e strategy 0 

# N o exemption s 0 

# 2 t o 3 year s o f manufacturers ' leadtime 0 

# ' Phase di na s flee t turnove r occur s - 5 0 percen t i n5 year s Stag e I I 0 

# Nationwid e or non-attainmen t area s onl y strategy 0 

# Federall y

mandate dexemption s i nClea nAi r Ac t o f 10,00 0 gp m majors/50,00 0 gp

m independents . State s coul dimpos e les s generou s exemptio nlevel s 0 

# Installe di n3 t o 7 year sVACUU M CONTRO L SOLENOI D

REFUEUN Q VAPO R CARBO N CANISTE R 3/1 6 IN . 1.0 . VAPO R UN E

CONDENSAT E CHEC KVALV E AN D LIQUI D 8HUT-OF F VALV E FUE L TAN K NOZZLE-ACTUATE D VEN TVALV E

VACUU M PURG E VALV E 3/ 4 IN . 1.0 . VAPO R LIN E 

## X OEBl VAPOR/LIQUI D SEPARATO R

MKMPTM M MAT ! MA L ATIC* . REFUEUN Q VAPO R RECOVER Y SYSTE M

CHEVROLE TCAPRIC E UUgLLg W AHOC1AT11 . IM C »Alllmor» . M P wiio*tT|lcmt»OA/ £ ISHETI H |>AOIIO»I .P. 6


## EVAPORATIVE/REFUELIN G VAPO R RECOVER

Y SYSTE M MANIFOL D PRESSUR E VEHICL E SPEE D COOLAN T TEMPERATUR E • • 

# © RP M TIM E DISTANC E THROTTL E POSITIO N

SYSTE M COMPONENT S CA ? C *L-E R ~w5 E - TC P '.ENTE D 2 r '_ : Ei . "'AN KVEN T - INTERNA L PASS . CA R

- FUE L "A\ KVEN T - EXTERNA L TRUC K i > 2iF==.=E.\r.A L PRESSUR E CHEC KVALV E 6 ~uEi.TAN K 7 REFUELIN G VAPO R CANISTE R 8 FILTE R 3 PURG E Al R INLE T - REMOT E PASS . CA R - REA R SUSPENSIO N CROSSUEUEE a TRUC K- UNDERHOO D ' 0 VAPCRUN E - S/ 8 • ! D . : ' • TAN KVENT-ROLLOVE R VALV E • 2 PURG E UN E -5/"*6 '
' 3 PURG E LIN E - V« - M PURG E SOLENOI D - DUT Y CYCL E CONTROLLE D 1 5 ELECTRONI C CONTRO L UNI T 1 6 EVAPORATIV E VAPO R CANISTE R 1 7 T O BI-LEVE L PURG E 1 8 MANIFOL D VACUU M LIN E 1 9 VACUU M SOLENOID -ON/OF F

REFUELIN G FILLE R TUB E FEATURES :

- NOZZL E SEALIN G DEVIC E

- =EFUEL;N G EVEN T CEVlC E

- PRESSUR E RELiE F DEVICE.S ) NOZZL E SHUT-OF F (LIQUID ! VAPC R CONNECTIO N T O CANISTE R LIQUI D CARRYOVE R PREVENTIO N

## Typica l Current Evaporativ e System

PRESSURE/VACUU

M RELIE FCA P EXTERNA

L VEN T LIN E 

# tf 

# I FLOAT/ROLLOVE

R VALV E 

# V ANT I - SPITBACK VALV E / 3/8 " DIA .

8 ' LON G & PURG E VALV E

1 LITE R CARBON . CANISTE R T O PURG

E INDUCTION POIN T

FUE L TAN KREMOV E 

## Onboar

dModification s

SHORTE N VAPO RLINE

MODIF Y

ENLARG E CARBO N CANISTE R

. 0 0

## Onboar dPlu s Evaporativ e System

PRESSURE/VACUU M RELIE F CA P N O EXTERNAL VEN T LIN

E SHORTE R VAPORLIN

E 

# V 

# v \ MODIFIE

D FLOAT/ROLLOVER VALV E 

# X ANT I - SPITBAC K VALV E & PURG E VALV E

T O PURGE INDUCTIO N POIN T ENLARGE

D CARBO N CANISTERN FUEL TANK