P. 1 

# OAR Box 1830 Prepped byOllie Stewart



### Document

Number: 

# 12 ) IV-B-8 Docket Number: 

# A-87-1 1

Printed 11/13/20087:20:51 AM Sheet 12 of 232P. 2 £"?* ? 

# J '• - < £ ^ " ^ W

7l".'.S» S



## AUGI 6 (98 8 •-^

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### • v

### i MSKORMJDt m • ) i SUBJECT : Measuremen t o f H C Releas e Wit hGa s Ca pRenova l



### TO : THHU : Pete r Hutchins , Mechanica l Enginee r

Standard s Developmen t an dSuppor t Branc h Charle s L . Cray , Jr. , Directo r Emissio nContro l Technolog y Divisio n Joh nP . Anderson , Senio r Projec t Mange r Standard s Developmen t an dSuppor t Branc h Cheste r J . France , Chie f Standard s Developmen t an dsuppor t Branc h A t ou r request , E& Dha pcomplete dtw o ga s ca premova l test s usin gth e SPft modifie drefuelin gcontro l syster . Th e averag e taas s o f hydrocarbo nrelease da s a resul t o f ca r ca p renova l a t wha t woul dnormall y b e th e beginnin go f th e ho t soa k tes t ^a s 0.0 5 craos . Tr. o 'refuslin qsvEten ' an dit s configuratio no r use di n thes e test s war . a c follows :

EP A modifie dG M

ga s tan k«it h"blue " rollover/ven t valve . Approximatel y

3 ft . o f 1/2 " dia . hos e fro ^ roliover/vsn t valv e t o tee . Pro non e branc ho f th e te e int oth e caniste r usin g raininurolengt ho f tubin c Pro a th e othe r branc ho f th e te e t o a napproximatel y 1 1 foo t lengt ho f 5/16 * dia . meta l vapo r lin * (th e lin e use dwa s tha t whic hha dbee nemploye di nEP A presentations) . 2 1/ 2 lite r caniste r modifie dt o cente r to pload , botto m ven t anc ? fille dwit hMitsubish i carbon . rtfctf <\C* X ' 

### fc oN' \*C * 

# *^V-- ^ AP. 3 v^ 1 Testin g wa s performe d a s follows : 0 Purg e caniste r fo r 1 1/ 2 hour s a t a flo wrat e o f 1 J

_ - cfm . • f-Plac e 6. 0 gallon s o f 9. 0 RVP chille d fue l i ntank.f
- ^ Fue l fromligh t dut yfue l dispense r use d in

certificatio n testing . * 0 Plac e "refuelin g system " i nSHE D (purg e fa non) . Hoo k u p necessar yeguipmen t t o hea t tank and t o j monito r tank temperatur e an d pressure . 0 Hea t fuel . Hea t fro m60° F t o 84° F 'i non e hou r t o represen t diurna l hea t build , followe d immediatel y b yheatin g from84 ° t o 104° F i n3 5 minute s t o represen t bag s 1 , 2 and 3 and 1 0 minut e ho t soa k o f th e tailpip e test . Tota l tim e o f tank heatin g 9 5 minutes . Tank pressur e an d temperatur e wer e recorde d every5 minutes . ° Discontinu e heatin g a t 104° , tur nof f purg e fan , tur n o nmixin g fan , sea l SHED . Ca p vapo r lin e a t en d whic hwoul d g o t o th e engin e (simulate s closur e o f purg e contro l valv e whe n engin e i s turne d off) . ° A t 4 minute s afte r terminatio no f heatin g measur e H C leve l i n SHED . 0 A t 5 minute s afte r terminatio no f heatin g remov e ga s cap . Replac e ga s ca p afte r ventin g vapors . 0 A t 6 minute s afte r terminatio n o f heatin g measur e H C leve l i n SHED . Tank pressure s recorde d durin g th e test s ar e summarize d a s follows : ° Firs t test : 0.0 1 inc hwate r fo r firs t 6 0 minutes . 0.0 2 inc hwate r fo r remainin g 3 5 minutes . 0.0 2 inc hwate r befor e and afte r ga s cap removal . 0.0 C inc hwate r whe n ga s ca p wa s off . ° Second test : Fluctuation s betwee n0.0 0 and 0.0 1 ine : wate r fo r firs t 6 5 minutes . 0.C: . inc hwate r from7 0 minut e readin g throug h8 5 minut e reading . O.Cl i inc hwate r fo r remainin g 1 0 minutes . 0.0 1 inc hwate r befor e and afte r ga s cap removal . 0.0 0 inc hwate r whe n ga s ca p wa s off . Hydrocarbon s release d int o th e SHE D a s a resul t o f ga s ca p remova l were : ° Firs t test : 0.04 2 gram 0 Second test : 0.05 6 "P. 4



### A s a resul t o f thi s testing , i t ca nbe conclude d tha t the fue l tan

k pressur e o f the "EP Arefueling system " afte r an exhaus t emission tes t woul d b e o n th e orde r o f 0.0 1 t o 0.0 2 inchwate r an

d tha t a

n associate d ga s ca p remova l woul d contribute ^ abou t 0.0 5 gram s HC t o a ho t soak evaporative^ , emission s |ests . 6269 W' V -