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# OAR Box 1147
Prepped by Ollie Stewart



# Document

Number: 

# 213)IV-E-8 7
Docket Number: 

# A-87-1 1

Printed 4/22/20082:42:58PM

Sheet 213 of 242P. 2



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UNITE D STATE S ENVIRONMENTA L PROTECTIO N AGENC Y \^M-£r

/ AN N ARBOR
. MICHIGA N 4810 5



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# I 4 198 9

MEMORANDU

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## SUBJECT : Meeting Wit h G M Personnel; ' Refuelin g Tes t Procedur e
FROM :
TO : Pete r Hutchins , Mechanica l Enginee r

Standard s Developmen t an d Suppor t Branc h Docke t A-87-1 1

In respons e t o a reques t b yGM , I me t wit h G M personne l o n January5 , 198 9 t o review question s pose d b yG M o n detail s o f EPA' s propose d onboar d tes t procedure
. The question s a s pose d b yG M ar e containe d i n Attachmen t 1
. G M personne l i n attendanc e wer e Joh n Bjelobrk , Lis a Fio r an d Kevi n Cullen
. A t th e star t o f the meetin g G M personne l wer e advise d tha t comment s provide d woul d no t be officia l EP Aresponse s t o thei r questions
. Theywer e encourage d t o incorporat e thes e an d an y othe r question s i n G M comment s o n th

e tes t procedur e whe n the supplementa l notic e wa s published
. G M personne l tes t invalidatio n wording o f a

n EP A i s reconnecte d prio r (§86.133-xx(a)(10)(i))
. G M pointe d ou t tha t corporat e polic yrequire d wheneve r a tes t faile d t o mee t the exac t tes t procedure ; e.g. , i f refueling caniste r

t o ga s ca

p installatio n personne l wen t o

n t o poin t ou t tha t sinc e theywer e performing refueling emission s testing they wer e desirou s o f understandin g EP Aintention s on th e performanc e o f th e detail s o f the tes t s o tha t thei r tes t validator s coul d be appropriatel yadvised
.P. 3



## Eac h o f th

e question s pose d b yG M wer e reviewe d o n th e basi s o f the above
. A s a resul t o f thi s review i t i s apparen t tha t G M ha d correctl ynote d som e mino r discrepancie s in the supplementa l proposa l betwee n the figure s an d the writte n regulation s an

d betwee n som

e section s withi n th e document
. Some o f thes e discrepancies ; e.g. , time s betwee n tes t events , can caus e confusio n an d wil l be correcte d prio r t o SNPR M publication
. Othe r discrepancies ; e.g. , difference s in allowe d engin e starting unde r simila r tes t conditions , ar e o f littl e significanc e an

d can b e incorporate d following EP Arevie w o f comments . Attachmen t

6754 WP. 4 

# fi.TTfiCHtfEA'T

i

Milfor d Provin g Groun d Curren t Produc t Engineerin g Genera l Motor s Corporatio n 

## Decembe r 21 , 198 8

Mr . Joh nAnderso n U.S . Environmenta l Protectio nAgenc y 256 5 Plymout hRoa d An nArbor , Michiga n4810 5

Dea r Mr . Anderson :
Enclose d i s a copy o f ou r partia l lis t o f question s regardin g th e EPA' s Tes t Procedur e o

n Evaporativ e an

d Refuelin g Emission s in additio nt o th e Tes t Procedur e Flow

Diagram s depictin g ' th e tes t sequence , a s propose d o n Septembe r 1 , 1988 . W e appreciat e th e opportunit y t o revie w

an d clarif y

thes e issue s wit hyo u o n Januar y 5 , 1989 . Sincerely ,

Kevi nCulle n Tes t System s Engineerin g Mi l ford-Vehicl e Emissio nLaborator y Enclosure s
cc : E . E . Conne r L . M . Fior-EA SCONCERN S AN O QUESTION S REGARDIN

GTH E PROPOSE D TES T PROCEDURE S

FO R EVAPORATIVE AND REFUELINGEMISSION S (EPA DRAF T DATE D SEPTEMBE R1 , 1988 ) (PARTIAL LIST ) Pag e 1

[TE M 1 . Vehicl e Preconditionin g PROPOSE D REQUIREMEN T 86.132-xx(a)...Durin g any perio dtha t th e vehicl e i s parke di nth e tes t are a awaitin g testing , th e fue l tank cap(s ) ma y b e i nplace.. . CONCERN/QUESTION EPA' S CLARIFICATIO N
• Uha t practic e wil l EP A follo w regardin g th e fue l tan k cap(s) :

- Uhe nth e vehicl e i s brough t insid e o f th e labt o anbien t temperatur e o f 68°F-86° F andbefor e th e initia l fue l drainin g i s completed ?

- Afte r th e initia l fue l drainin g i s completed ?

- Durin g th e Tenperatur e Stabilization ?

- Afte r th e Caniste r Saturatio nan d befor e th e fue l drainin g activit y fo r th e FT P Prep ?

- Durin g th e col dsoa k an dbefor e th e fue l drainin g activit y for.th e diurnal ?

- Afte r th e refuelin g measuremen t i s complete d an dunti l th e tes t dat a i s validated ?
• Ca nth e inne r seal s i nth e fue l tank fille r neck s (i f s o equipped ) b e disable d a t th e point s wher e th e fue l ca premova l i s allowe dfo r th e system s whic hd o no t utiliz e th e inne r seals ? 86.132-xx(a)(1)...Canister(s ) shal l no t b e purge dprio r t o beginnin g thi s sequence.. . • Uha t sequenc e i s EP A referrin g to ?

T J
" biCONCERN S AN D QUESTION S REGARDINGTH E PROPOSE D TES T PROCEDURE S

FO R EVAPORATIVE AN

D REFUELINGEMISSION S (EPA DRAF T DATE D SEPTEMBE R1 , 1988 ) (PARTIA L LIST ) Pag e 2

ITE M PROPOSE D REQUIREMEN T Vehicl e Temperatur e Stabilizatio n 86.132-xx(a)(1)(ii)...Thi s tenperatur e stabilizatio nste pma y b e omitte d o nvehicle s uhic har e already temperatur e stabilize d a s a resul t o f storag e i n th e tes t area . CONCERN/QUESTION
• Uhe ndoe s th e vehicl e temperatur e stabilizatio nstart :

- Uhe nth e vehicl e i s brough t insid e o f the labt o ambien t temperatur e o f 68*F-86*F ?

- Afte r th e vehicl e fue l tank s ar e draine dan

dth e fue l tank cap(s ) ar e installed ?
• Uhe nth e vehicl e i s parke di n th e soa k area ?

- I s a vehicl e tha t ha s jus t complete d th e refueling measuremen t temperatur e stabiI i zed ? EPA' S CLARIFICATIO N

Canister Saturatio n 86.132-xx(a)(1)(iii)(B)(4).. . (caniste r breakthroug hi s define d a s a poin t a t whic hth e hydro carbo nconcentratio ni n th e SHE D increase s by

a facto r o f thre e o r greate r i n on e minut e o r less),.. . • Ho w wil l EP A

insur e non-prematur e terminatio no f caniste r saturation s (i.e . possibl e hardwar e leak s and non-homogeneou s mixing) ?
• Why i s th e mixin g (befor e sampling ) require ddurin g th e refuelin g tes t an dno t darin g th e caniste r saturation ?

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T J C DCONCERN S AN D QUESTION S REGARDIN

GTH E PROPOSE D TES T PROCEDURE S

FO R EVAPORATIVE AN D REFUELINGEMISSION S (EPA DRAF T DATE D SEPTEMBE R1 , 1988 ) (PARTIAL LIST ) Pag e 3

ITE M PROPOSE D REQUIREMEN T Caniste r Saturatio n (continued ) 86.132-xx(a)(1)(iii)(B)(4)...Th e fue l dispensin g rat e shal l b e betwee n3. 0 an d5. 0 gal/mi n(11. 3 an d18. 9 l/min).. .

- (saturation ) 86.233(e)(6)...Th e dispensin g rat e shal l b e betwee n3. 0 an d10. 0 gal/mi n(11. 4 t o 37. 9 l/min).. . - (refueling ) CONCERN/QUESTION
• Uha t i s th e reaso nfo r differen t fue l flo w rate s durin g th e caniste r saturatio nan

drefuelin g measurement ? EPA' S CLARIFICATIO N

86.132-xx(a)(1)(iii)(B)(4)...I f caniste r breakthroug hdoes ' no t occu r durin g th e firs t ful l fuelin g operation , th e SHE D shal l b e opened , th e vehicl e remove d withou t startin g the engine,.. . • Mus t th e vehicl e alway s b e remove d from th e SHE D eve ni f th e drainin g ca nb e performe din th e SHED ?

86.132-xx(a)(1)(iii)(B)(5)...I f the vehicl e • Ho w i s EP A plannin g t o accomplis h i s equippe dwit hdua l fue l tank s anda commo ncanister , eithe r fue l tank ma y b e fille dfirst.. . thi s activity ?
• Ho w wil l th e openin g o n th e SHE D wal l for the primar y

fue l tank b e seale dUiil e th e secondar y fue l tan k i s bein g filled ?
• Uil l th e spille dfue l mixin g blowe r b e use ddurin g th e caniste r saturation ? 86.207(a)(1)(i0(B)(4)...A nexploston 3 proo f blowe r o f 100-20 0 f t /mi n

3 (2.8-5. 7 m

/min ) capacit y

i s require d t o enhanc e mixin g o f vapor s o f spille d fue l throughth e enclosur e atmospher e durin g tests . Th e discharg e fro m thi s blowe r shal l be.. . • Uil l mor e tha non e blowe r b e used ?
• I f onl y

on e blowe r i s use dho w ca n i t b e repositione dfo r th e secondar y fue l tank fueling ? 

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T JCONCERN S AND QUESTION S REGARDIN GTH E PROPOSE D TES T PROCEDURE S

FO R EVAPORATIVE AN D REFUELINGEMISSION S (EPA DRAF T DATE D SEPTEMBE R1 , 1988 ) (PARTIA L LIST ) Pag e 4

ITE M Caniste r Saturatio n (continued ) PROPOSE D REQUIREMEN T 86.132-xx(a)(1)( i i 0(B)(6). . .Remov e th e vehicl e fro

m th e SHE D withou t startin g th e engine . CONCERN/QUESTION
• Uhy shouldn' t th e engin e b e starte d afte r the caniste r saturatio ni norde r t o mov e th e vehicl e t o th e fuelin g are a whe nit ca nb e starte dafte r th e refuelin g i s don e t o mov e th e vehicl e t o th e pre pdynamometer ? EPA' S CLARIFICATIO N

4 . Drain/F i Ufo r FT P Pre p 86.132-xx(a)(2)...Uithi non e hou r o f loading th e canister(s ) t o breakthrough , th e refuelin g emissio ncanister(s ) shal l b e disconnecte d(gasoline-fuele d vehicle s only).. . • Figur e Bxx-lO a i s no t consisten t wit h th e text . Th e maximu

m o f on e hou r requiremen t i s show

nfro m th e caniste r breakthroug ht o th e beginnin g o f th e Fue l Drai n& Fil l activity . Uha t i s correct ?
• I f th e tim

e i s measure dt o th e poin t a t whic hth e emissio ncaniste r i s disconnected , how

soo nshoul dthe nth e fue l drain/fil l activit y start ?
• Ho w soo nafte r completio no f th e fue l drain/fil l activit y

shoul dth e refuelin g emissio ncaniste r b e connected ? 

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T J 0 0CONCERN S AND QUESTION S REGARDINGTH E PROPOSE D TES T PROCEDURE S

FO R EVAPORATIVE ANO REFUELINGEMISSION S (EPA DRAF T DATE D SEPTEMBE R1 , 1988 ) (PARTIA L LIST ) Pag e 5

ITE M 5 . Drain/Fil l fo r Diurna l PROPOSE D REQUIREMEN T 86.133-xx(a)(6)...Immediatel y prio r t o th e diurna l breathin g los s test , th e refueling emission s canister(s ) shal l b e disconnecte do r a diverte r valv e opened , i f s o equipped , t o preven t th e flow.. . CONCERN/QUESTION
• I f th e diverte r valv e i s open , ca n th e fue l vapor s fro

m th e fue l tan k b e route dt o th e atmosphere ?
• Uha t doe s th e "immediately " i n thi s cas e mean ? EPA' S CLARIFICATION

86.133-xx(a)(10)(i)...Instal l fue l tank cap(s ) and reconnec t refuelin g emission s contro l canister(s).. . • Ca norde r o f thes e event s b e reverse dan di s i t important ?

Ho t Soa k 86.138-xx(j)...Utilizin g th e acces s port(s ) i nth e sid e o f th e enclosure , th e fue l tan k cap(s ) shal l b e remove dfo r a perio d no t les s tha n5 second s no r longe r tha n 2 0 second s t o reliev e an y pressur e i nth e tan k an dthe nb e reinstalle dan dtightened . Thi s operatio nshal l b e complete dwithi n five minute s o f engin e shutdown . • Uhe ni s th e ca pconsidere d "removed " an dwhe ni s i t considere d"reinstalled" ?
• Uha t i s th e differenc e betwee n th e "reinstalled " an d"tightened" ?
• Ca na valv e b e installe do n th e fue l ca pt o accomplis hth e "pressure " releas e an dt o provid e possibl e automation ?
• Shoul dth e fue l ca po f th e secondar y fue l tank b e remove deve nthoug hth e fue l frc m thi s tan k i s no t use d durin g th e FT P test ?

7 . Pre pfo r Refuelin g 86.232(a)(2)...an d th e vehicl e shal l b e driven , usin g minimu

m throttle , of f o f th e dynamomete r an dt o th e fue l drai n equipment . • Uhe ni s th e engin e turne dof f afte r th e pre pi s completed ?
• Ca nth e engin e b e restarte di f turne dof f befor e th e refuelin g caniste r i s disconnected ? i-if l -S .* • if"'i'7 i fir B " 1 iaj

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T J i nCONCERN S AN O QUESTION S REGARDIN

GTH E PROPOSE D TES T PROCEDURE S

FO R EVAPORATIVE AN

O REFUELINGEMISSION S (EPA DRAF T DATE D SEPTEMBE R1 , 1988 ) (PARTIAL LIST ) Pag e 6

ITE M 8 . Vehicl e Coo l Dow n PROPOSE D REQUIREMEN T 86.232(a)(3)...Uithin1 0 minute s o f completin g th e drive , th e refuelin g emission s canister(s ) shal l b e disconnecte d o r a diverte r valv e opened , i f s o equipped , t o preven t th e flo w o f vapo r fro

m th e fue l tan

k t o th e refuelin g canister . I f disconnected , th e ope nend o f th e vapo r lin e leading t o th e refuelin g caniste r shal l b e plugged . Th e fue l tank cap(s ) shal l the nb e removed , th e vehicl e grounded,.. . CONCERN/QUESTIO N
• Ca nth e orde r i nUiic hth e refuelin g caniste r and th e fue l tank cap(s ) ar e remove d b e reverse d and i s i t important ? EPA' S CLARIFICATION

86.232(a)(3)...Uithi n6 0 minute s o f completin g th e driv e drainin g o f th e fue l tank(s ) shal l b e completed , and th e tank(s ) fuele d wit htes t fuel , specifie d i n86.113 , a t a temperatur e o f 81. 0 t o 84.0* F (27. 2 t o 28.9*C) , t o 1 0 percen t o f nomina l fue l tank capacit y t o th e neares t 0. 1 U.S . gallon (0.3 8 liter) . • Figur e Cxx- 1 i s no t consisten t wit h th e text . Th e maxinu nliai t o f 6 0 minute s i s show

nfro m th e end o f th e Pre p cycl e t o th e beginnin g o f th e temperatur e stabilization . • Uha t i s th e significanc e o f th e 81. 0 t o 84.0' F fue l temperatur e requiremen t whe nth e refuelin g canister(s ) ar e disconnecte d and th e vehicl e i s allowe d t o soa k a t 8 0 ±3* F fo r 6-2 4 hours ?
• Ca nth e roa ntemperatur e fue l b e use d instead ?

T J oCONCERN S ANO QUESTION S REGARDIN GTH E PROPOSE D TES T PROCEDURE S

FO R EVAPORATIVE AND REFUELIN GEMISSION S (EPA DRAF T DATE D SEPTEMBE R1 , 1988 ) (PARTIA L LIST ) Pag e 7

ITE M 8 . Vehicl e Coo l Down (continued ) PROPOSE D REQUIREMEN T 86.232(a)(3)...Th e fue l tank cap(s ) shal l the nb e replaced , th e disconnecte dvapo r lin e leading t o th e refuelin g caniste r plugge do r th e diverte r valv e closed , an d th e vehicl e moved,.. . CONCERN/QUESTION
• Ho w soo nshoul dth e fue l tank cap(s ) b e replace dafte r th e fuelin g i s completed ?
• Figur e Cxx- 1 i s no t consisten t wit h th e text . It appear s i nth e tex t tha t th e refueling caniste r lin e shoul db e reconnecte dafte r th e refuelin g i s done . However , i nth e Figure , th e refuelin g caniste r i s reconnecte dafte r 6-2 4 hour s o f soak . • I f the refuelin g caniste r i s require d t o b e reconnected , i s th e orde r i n whic hth e fue l tank cap(s ) an d refuelin g caniste r ar e connecte d inportant ? EPA' S CLARIFICATIO N

86.232(a)(3)...an d th e vehicl e moved , withou t startin g th e engine , t o th e are a o f th e tes t laborator y wher e i t wil l underg o temperatur e stabilizatio n a t a temperatur e o f 80. 0 t3.0* F (27. 0 t1.7*C) . Th e duratio no f temperatur e stabilizatio nshal l b e betwee n6 hour s an d2 4 hours . • Uhe ndoe s th e temperatur e stabilizatio nstar t i f th e refuelin g are a i s kep t a t 80. 0 ±3*F ?
• Uhe ndoe s th e temperatur e stabilizatio nend :

- A t th e star t o f th e refuelin g test ?

- Uhe nth e fue l tank ca pi s removed ?
• Uha t i s th e significanc e o f 8 0 i3* F temperatur e requiremen t whe nth e refuelin g tes t ca nb e performe di n th e SHE D a t aufcien

t temperatur e betwee n68-86*F ? 

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### mPag e 8 CONCERN S AND QUESTION S REGARDIN GTH E PROPOSE D TES T PROCEDURE S

FO R EVAPORATIVE AN

D REFUELINGEMISSION S (EPA DRAF T DATE D SEPTEMBE R1 , 1988 ) (PARTIA L LIST )

ITE M 9 . Refuelin g Emission s Measuremen t PROPOSE D REQUIREMEN T 86.233(e)(1)...Th e lin e fro m th e fue l tank(s ) t o th e refuelin g emission s caniste r shal l b e connected . Remov e th e fue l tank cap(s) . CONCERN/QUESTION
• Figur e Cxx- 1 i s no t consisten t wit h th e text. Th e figur e indicate s tha t th e fue l tan k cap(s ) ca nb e remove dbefor e th e refuelin g caniste r i s connected . • Uhy shoul dbot ho f th e fue l tank cap s b e remove dwhe n86.233(e)(8 ) indicate s tha t th e refuelin g procedur e i s "performe dfo r eac hfue l tank" ? EPA' S CLARIFICATIO N

86.233(e)(2)...Uithi n5 minute s o f removin g th e fue l tan k cap(s) , th e tes t vehicle , wit hth e engin e shu t off , shal l b e move dint o th e enclosure . Th e tes t vehicl e window s an dluggag e compartmen t shal l b e opened . • Uhe ni s th e vehicl e considere d move dint o th e enclosure ?
• Uha t i s th e significanc e o f th e 5 minut e tim

e requirement ?
• How soo nshoul dth e refuelin g tes t star t afte r th e vehicl e i s move dint o th e enclosure ?
• Ho w soo nshoul dth e refuelin g measuremen t o f th e secondar y fue l tank star t afte r completio no f th e primar y fue l tan k refuelin g measurement ?
• I ncas e o f dua l tanks , shoul d th e vehicl e b e move dfro

m th e SHE D afte r coapletio no f th e primar y fue l tank refuelin g measurement ?
• Ho w i s th e 5 minut e requiremen t treate di ncas e o f dua l tank vehicles ?



### -

T J t- OCONCERN S AND QUESTION S REGARDIN GTH E PROPOSE D TES T PROCEDURE S

FO R EVAPORATIVE AN D REFUELINGEMISSION S (EPA DRAF T DATE D SEPTEMBE R1 , 1988 ) (PARTIAL LIST ) Pag e 9

ITE M 10 . Refuelin g Equ i emen t PROPOSE D REQUIREMEN T 86.207(a)(2)...Th e accurac y o f th e mete r fo r measurin g th e dispense dfue l volume shal l b e ± 2 percen t a t th e tes t flo w rate . CONCERN/QUESTIO N
• Uha t i s the calibratio nmetho dan d frequency ?
• Uha t i s the calibratio nfrequenc y o f othe r majo r component s includin g th e SHED ? EPA' S CLARIFICATIO N

11 . Fue l Specification s 86.213(b)...Fue l RVP shal l b e measure d periodicall y

t o assur e complianc e wit h applicabl e requirements . A t leas t on e measuremen t shal l b e take nfro m eac h batc ho f fue l use di na refuelin g car t o r undergroun dstorag e tank . Th e result s o f eac hmeasurement shal l b e use d fo r th e time perio dsinc e any

previou s measurement , bu t shal l no t b e use dfo r any subsequen t time . • Uha t i s a "batch" :

- Eac htim

e fue l i s adde dt o th e refuelin g cart ?

- Eac htim

e fue l i s adde dt o th e undergroundstorag e tank ?

- Eac htim

e fue l i s adde dt o th e "da/ 1 (above ground ) tank ?
• Fro m wher e shoul dth e fue l sampl e b e taken :

- Undergroun dstorag e tank ?
• Refuelin g cart ?

- Da y tank ?
• How ca nw e assur e vali dtests , whe n RV P measuremen t mus t b e mad e afte r th e testing i s don e (i.e . ".. . shal l b e use dfor th e time perio dsinc e an y previou s measurement , bu t shal l no t b e use dfo r an

y subsequen t time") ?
• Ca na modifie d AST M

metho db e use d fo r th e RV

P fue l analysis ?
• How wil l the fue l sampl e fo r RVP analysi s be take na t EPA ? "ik-mmm.

T JCONCERN S AN D QUESTION S REGARDIN GTH E PROPOSE D TES T PROCEDURE S

FO R EVAPORATIVE AND REFUELIN GEMISSION S (EPA DRAF T DATE D SEPTEMBE R1 , 1988 ) (PARTIA L LIST ) Pag e 1 0

ITE M 12 . Tes t Validatio n PROPOSE D REQUIREMEN T CONCERN/QUESTION No t addresse d • Uil l th e emission s an drefuelin g portio no f th e propose dtes t sequenc e b e independentl y

validate dfro

m eac h othe r (i.e . wil l a "void " refuelin g tes t automaticall y

"void " a nemissio n tes t an dvic e versa) ?
• I ncas e o f "void " tests , shoul d th e propose dtes t sequenc e alway s b e repeate dfro

m th e beginnin g (includin g th e tes t measuraii.nts ) i norde r t o produc e a "valid " test ?
• I f th e "void " tes t i s recognize d durin g th e tes t sequence , shoul dth e sequenc e b e continue do r "aborted" ?
• I s th e timing o f th e propose dtes t sequenc e alway s reference dt o th e refuelin g caniste r activitie s o r fue l tank ca pactivities ? EPA' S CLARIFICATIO N

13 . Record s Require d 86.242(f)...refuelin g emissio ncaniste r continuou s driv e purg e mile s fo r integrate dsystem s anddescriptio no f ho w mileag e i s determined,.. . • Uha t driv e i s EPA referrin g to ?

86.242(h)...Recorde r charts : Identif y zero , span , an dsanpl e traces . • Ca nth e compute r system b e use d instead ? 86.242(j)...Temperatures : Soa k area ; dispense dfuel , initia l an dfinal . • I s th e "initia l an dfinal " temperatur e reference dt o th e soa k are a o r dispense d fue l o r both ?

GM-M i I for d Vehicl e Emissio nLaborator y Decembe r 21 , 198 8 ' T J