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# OAR Box 1830 Prepped byOllie Stewart



### Document

Number: 

# 19 ) IV-B-1 5 Docket Number: 

# A-87-1 1

Printed 11/13/2008 7:20:51 AM Sheet 19 of 232

# WS& y

>««* & ^ UNITE D STATE S ENVIRONMENTA LPROTECTIO N AGENC Y AN N ARBOR . MICHIGA N 4810 5 P. 2

OFFIC E O F AI R AN D RADIATIO N 

### DEC 

### I 3 193

3

MEMORANDU

M
SUBJECT :
FROM :
TO : Refueling Emissio n - Partia l Fueling

Pete r Hutchin s /* Standard s Developmen t an d Suppor t Branc h Th e Recor d The result s o f nin e partia l fueling s an d one ful l fueling ar e show

n in Tabl e 1 . Thes e test s wer e performe d b yEP At o evaluat e refueling emission s durin g partia l fueling s o f th e EPA passiv e refueling emissio n contro l system . The EPApassiv e refueling emissio n contro l systemused i n thi s dat a collectio n consiste d o f a modifie d G M fue l tan

k an d fue l filler , a "blue " ven t valve , an d a 4 lite r caniste r connecte d t o the ven t valve be approximatel y3 fee t o f 5/8 " I D tubing . The RV

P o f th

e fue l used in thi s projec t wa s approximatel y9 ps i (measured value s ar e show n in Tabl e 1) . Al l fueling operation s wer e performe d wit hthe fueling car t dispensing flo

wrat e se t a t 1 0 gp man d wit hthe tan

k an d dispense d fue l temperature s withi n NPR M limit s (measure d temperature s ar e give n in Tabl e 1) . Prio r t o eac hrefueling emissio n measurement , th e caniste r wa s purge d for approximatel y 1 1/ 2 hour s a t a

" flo wrat e o f 1 cfm . Thre e refueling emissio n measurement s wer e performe d for eacho f thre e partia l fueling ranges . The partia l fueling range s were ; a ) fro mapproximatel y 10 % fue l tan

k volume t o approximatel y1/ 2 fue l tan k volume , b ) fro mapproximatel y1/ 2 fue l tan k volume t o ful l an d c ) fro

m approximatel y90 % fue l tan k volume t o full . The average s o f the measurement s ar e a s follows : partia l refueling emissio n

a ) 10 % t o 1/ 2 tan

k volume ; 0.0 7 gram/gal . b ) 1/ 2 tan

k volume t o full ; 0.0 1 gram/gal . c ) 90 % tan

k volume t o full ; 0.1 2 gram/gal .P. 3



### -2

- Th e highes t averag e refueling emission s rat e (gram/gallon ) occurre d during th e 9 0 percen t tank volume t o ful l tan k fuelings ; Whil e thi s refueling emissio n rat e wa s highe r than th e propose d standard (0.1 0 g/gal ) fo r ful l fuelings , th e actua l mas s o f hydrocarbo n emitte d wa s lo wan d represente d 9 5 percen t or greate r contro l o f refueling emissions . I t i s als o wort hnoting , tha t fueling s i n thi s range ; i.e. , fro m a n almos t ful l tan

k t o a ful l tank , occu r infrequently . Two o f thes e tes t had multipl e shutoff , simulating custome r topping off . Inspectio n o f th e SHE D hydrocarbo n concentratio n stri p chart s an d othe r dat a sheet s showe d tha t thes e shut-off s d o no t appea r t o hav e bee n majo r contributor s t o the refueling emission s measure d i n th e SHED . Mos t o f th e emission s appea r t o hav e bee n associate d wit hth e firs t shutof f in eachcase .
Attachment : Tabl e 1Dat e
9-9-8 8 9-13-8 8 9-14-8 8
9-9-8 8 9-13-8 8 9-15-8 8 9-12-8 8 9-14-8 8 9-15-8 8 9-13-8 8 Measure d

RVP (psi ) 9.0 5 9.0 0 8.9 5
8.9 5 9.0 0 9.0 0 8.9 5 8.9 5 9.0 5 8.9 5 Fue l Volum e

Initiall yi n tank (gal ) 1.5 1 1.5 0 1.5 0
7.5 1 7.5 2 7. 5 14. 2 14. 2 14. 2 1.5 0 Tab l

Refuelin g Emission s
Fue l Volum e Dispense d (qal ) 6. 0 6.0 1 6.0 2
8.8 3 8.8 5 8. 9 2.4 5 2.3 8 2.2 2 14.5 1 Nozzl e

Shu t Of f manua l manua l l,auto . +manua l l,auto . 2,auto . l,auto . 3,auto . 4,auto . l,auto . l,auto . Tan k

Temp . <°F ) 79. 7 79. 0 79. 7
79. 2 79. 3 80. 1 80. 0 80. 4 79. 9 81. 0 e 1

- Partia l Dispense d Fue l tem

p (°F ) 81. 1 81. 7 81. 3
81. 9 81. 0 81. 0 81. 7 81. 1 81. 3 81. 3 Fuelin g

Caniste r Initia l (q ) 4152. 1 4168. 2 4159. 7
4153. 0 4163. 7 4159. 8 4177. 1 4162. 6 4157. 3 4166. 9 Weight s

Fina l (q ) 4187. 8 4210. 0 4199. 6
4207. 8 4222. 2 4217. 2 4192. 4 4178. 6 4171. 5 4266. 0 r

H C Collecte d bycaniste r (q ) 35. 7 41. 8 39. 3
54. 8 58. 5 57. 4 15. 3 16. 0 14. 2 99. 1 (q/qal ) 5.9 5 6.9 7 6.6 5
6.2 3 6.6 5 6.4 5 6.1 2 6.6 7 6.4 5 6.8 3 Refu e ling

Emission s 0.3 1 0.2 2 0.7 1
0.1 5 0.0 0 0.1 1 0.4 4 0.2 7 0.1 3 0.2 8 g/gal ) 0.0 5 0.0 4 0.1 2
0.0 2 0.0 0 0.0 1 0.1 8 0.1 1 0.0 6 0.0 2

6544 W