p. 1



# OAR Box 1830 Prepped by Ollie Stewart



### Document

Number: 

# 158 ) IV-C-125 Docket Number: 

# A-87-1 1

Printed 11/13/20087:20:59AM Sheet 158of 232P.2



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## v' 13D -C - U S »* * 4*k. r * UNITE D STATE S ENVIRONMENTA LPROTECTIO N AGENC Y AN N ARBOR

. MICHIGA N 4810 5

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~ - « . OFFIC E O F SE P I |93 8 AI R AN D RADIATIO N Mr . Gregor yJ . Dan a Automobil e Importer s o f America , Inc . 172 5 Jefferso n Davi s Highwa y Suit e 100 2 Arlington , V

A2220 2 Dea r Mr . Dana : OnJun e 30 , 198 8 EPAhel d a publi c worksho p o n th e propose d tes t procedure s fo r evaporativ e and refuelin g emissio n whic hhad accompanyin g it s refuelin g an d volatilit yNPRMs . A t tha t worksho p w e describe d severa l change s t o th e propose d procedure s designe d t o simplif yth e refuelin g tes t and t o insur e tha t non-integrate d refuelin g contrcl s o r evaporative-onl ycontrol s woul d hav e equivalen t in-us e performanc e t o integrate d refuelin g contro l systems . Enclose d fo r you r revie wi s a copyo f draf t regulation s embodyin g th e change s describe d a t th e workshop , plu s othe r lesse r change s resultin g fromEPA' s revie wo f tes t procedur e comments . Thes e regulation s wil l giv e yo u ful l detail s o f th e change s whic hw e ar e anticipatin g fo r ou r upcomin g reproposa l action . I f yo u hav e an yquestions , pleas e contac t Pete r Hutchin s o f m

ystaf f a t (313 ) 668-4340 . T o assis e i n ou r incorporatio n o f you r view s o n thes e draf t regulation s int o ou r reproposal , w e reques t tha t yo u suppl yu s you r commen: s b yn o later'tha n Septembe r 15 , 1988 . Sincerel yyours ,



### _^^yyyy^yyy Charle s L . Gray , -'j/ . Directo r , , Emissio nContro l Technolog yDivisi c Enclosur e cc : Docke t A-87rl l 6309 WENVIRONMENTA LPROTECTIO N AGENC Y 

### ^r 

### - 

### I 198 8 CtNiM/. LDOCKET lV.;C;iO MP. 4

APPENDIX : Sectio n 1 . Authority . Par t <8 6 2 . S86.X&C- 8

3 . S86.XXX- 9

4 . §86.XXX-1 0 TABL E O F CHANGE S MAD E T O VARIOU S SUBPART S

Chanqe Non e Add paragraph(e) . Standar d prohibiting releas e o f fuel , vapo r int o th e atmospher e during in-us e operations . Add paragraph s (e ) Standar d prohibiting releas e o f fue l vapo r int o th e atmospher e during in-us e operations . Delet e paragraph s (h)-(j ) an d updat e subsequen t references . Add paragrap h(e) . Reaso n

Additio no f on boar d refueling emissio n contro l procedur e an

d modificatio no f evaporativ e emissio ncontro l regulations . 

### Do .

Do .

5 . S86.XXX-2 4

6 . §86.107-X

X

7 . S86.130-X

X

8 . S86.131-X

X Standar d prohibiting releas e o f fue l vapo r int o th e atmospher e during in-us e operations . Coordinat e paragrap hDo . reference s i n §86.XXX-2 4 wit hchange s 2 , 3 , an d 4 . Add additiona l classifi

catio n criteri a i n(I9)(i) , (19)(ii) , (19)(iv) . Additio no f a requiremen t Do . fo r acces s port(s) , optio n fo r us e o f in-SHE D fuelhos e an d nozzle , SHE D gas tightnes s requiremen t a t (a)(1) . Remova l o f paragrap h (a)(8) , "Gasolin e vapo r generating equipment" . Additio n o f ne wparagraph (a)(8) , "Fue l equipment" . ' Replacemen t o f on e tes t Do . sequenc e figur e wit htwo tes t sequenc e figures . Time requirement s o f tes t sequence s show

no n th e figures . Add specificatio n o f 40 % tank fil l leve l fo r thermocoupl e placement . Chang e wordin g fromDo . "wit hgasolin e vapor " t o "no t connecte d t o th e vehicl e fue l tank " a t (c) .P. 5

9 . §86.132-X

XRequir e ga s cap of f whe nDo , vehicl e parke d out-of

- door s an

d allowoptio n o f ga s cap onwhe nvehicl e parke d i n tes t area , a t (a) . • ^ Remov e "For vehicle s -= • entering evaporativ e and/o r exhaus t emission s testing" , a t (a)(1)(ii) . Remov e gasolin e vapo r generating equipmen t procedur e fo r caniste r loading an

d replac e wit h a manufacture r recommen - datio n fo r caniste r loading , a t (a)(l)(iii)(A)(l) . Add purpos e o f hea t build s a t (a)(l)(iii)(2 ) t o co - ordinat e wit h(a)(l)(iii)(A ) (2)(xi) . Specif ycaniste r disconnec t procedur e an d refueling a t (a)(1)(iii)(A ) (2)(iii) . Replac e referenc e §86.078- 2 wit hreferenc e §86.082-2 . Correc t "6 0 + 2°F " t o "a t leas t 58.0°F " a t (a)(i)(iil ) (A)(2)(viii) . Add "i n° F (or i n° C fo r S I units) , a t (a)(i)(iii)(A)(2 ) (x) . Us e commo ndefinitio n fo r breakthrough , a t (a)(i)(iii ) (A)(2)(xi) . Ad d "Upo ncompletio no f loading o f th e evaporativ e caniste r connec t th e refueling canister" , a t (a)(i)(iii)(A)(2)(xi) . Add "i f no t alread yi nth e SHED" , an

d "Remove th e fue l tank cap(s) " (a)(i)(iii)(B ) (l) . ' Us e commo n definitio n fo r breakthrougha t (a)(i)(iii ) 

### (B)(1) . Chang e 3- 4 gal/mi nt o 3- 5 gal/mi n a t (a)(l)(iii)(B ) 

### (i> . Replac e "an

d draining o f th e fue l tank(s) " wit h"the vehicl e remove d withou t starting th e engine , an d draining o f th e fue l tank(s)" , a t (aHlXiii ) (B)(4) .P. 6

Add "the vehicl e move d int o th e SHE D withou t starting th e engine" , a t (a)(1)(iii ) (B)(4) . Add "I f th e vehicl e i s equippe d wit hdua l fue l tank s eithe r fue l tank may b e fille d first" , a t (a)(1 ) (iii)(B)(5) . Add "Vehicl e fueling . Withi non e hour o f loading th e canister(s ) t o breakthrough" , a t (a)(2) . Add "Dynamomete r drive " an d correc t figur e reference , a t (b) . 10 . §86.133-X

XAdd "(a ) Vehicle s equippe d Do . wit hfully-integrate d refueling emission s contro l systems " a t (a ) an

d renumbe r paragraph s an

d correc t references . Add requirement s i n paragraph(a ) fo r th e recording o f initia l an d fina l barometri c pressure s an d enclosur e ambien t temperatures . Specif ycaniste r disconnec t an d refueling a t (a)(6) . Add "i n° F (or i n ° C fo r S I units) " an

d correc t 4° C t o 13.3° C a t (a)(12) . Add paragraph(b) , Vehicle s equippe d wit hnon-integrate d an d partially-integrate d refueling emission s contro l systems . 11 . §86.138-X

XAdd 86.138-X

XDo . Incorporat e ne wparagraph (j) , requiring ga s cap removal . <' Clarif yparagraph(m) . 12 . Subpar t C Add Subpar t C . Do ,

Add Appendi x1(a ) an d Appendi x1(d ) a t 86.20 1 Defin e evaporativ e enclosur e b yreferenc e t p 86.107(a)(1 ) a t 86.207(a)(1) . Chang e flowrat e specificatio n fro

m9.8+0. 3 gpmt o 3 t o 1 0 gpma t 86.207(a)(2) . Add additiona l constraint sP. 7

o n directio n o f discharg e fro mmixing blowe r a t 86.207(a)(4) . Add paragraph(b ) t o 86.21 3 (RV

P confirmatio n requirements) . Remov e "The refueling emission s tes t procedur e mayb e performe d a s an individua l tes t o r i n combinatio n wit hth e evaporativ e an

d exhaus t emissio n tes t sequence s o f eithe r §86.13 0 o r §86.1230 " a t 86.227(a) . Replac e on e refueling tes t procedur e figur e wit h two refueling tes t procedur e figure s a t 86.230 . Updat e paragraph(a ) t o reflec t adde d figures . Remov e paragraphic ) a t 86.231 . Revis e 86.232 . Paragraph (a ) remov e caniste r conditioning procedure s fo r integrate d system s an d replac e wit hreferenc e t o Subpart s B an

d M plu s on e UDD S an

d vehicl e coo l down . Specif ycansite r disconnec t procedur e an d refueling . Defin e alternat e conditioning procedure . Paragraph(b ) applicabilit y t o non-integrate d an d partially-integrate d systems . Add consistan t definitio no f breakthroughi n (b)(l)(iv) . Specif ycaniste r disconnec t procedur e an

d refueling i n (b)(3)(ii) . Clarif ynultipl e fue l tank i drivedow

n i n(b)(3)(ii) . Replac e cooldow

nprocedur e wit hreferenc e t o (a)(3 ) i n (b)(4) . Remov e fue l sampl e collectio n an

d RVP measuremen t requiremen t a t 86.233(a) . Add "Remove th e fue l tank cap(s) " a t 86.23 3 (e)(1) . Add 5 minut e limi tP. 8

fo r placing vehicl e i n SHE D a t 86.233(e)(2) . Chang e fue l dispensing rat e specificatio n fro m 9.8+0. 3 gp

mt o 3 t o 1 0 gpma t 86.23 3 (e)(6) . Add "automati c nozzl e shu t of f occur s and " an d "multipl e nozzl e reactivation s mayb e required " a t 86.233(e)(6) . 13 . §86.1207-X

XAdditio no f requiremen t Do . o r acces s port(s) , optio n fo r us e o f in-SHE D fue l hos e an d nozzle , requir e gas-tightnes s o f SHE D a t (a)(1) . Add "i n° F (or i n ° C fo r S I units) " t o (a)(4) . Remova l o f paragraph(a)(8) , "Gasolin e vapo r generating equipment" . Additio n o f ne w paragraph(a)(8) , "Fueling equipment" . 14 . §86.1230-X

XReplac e on e tes t Do . sequenc e figur e wit htwo tes t sequenc e figures . Tim e requirement s o f tes t sequence s show

n o nth e figures . 15 . §86.1231-X

XChang e wording fromDo . "wit hgasolin e vapor " t o "no t connecte d t o th e vehicl e fue l tank" , a t (b)(2) . 16 . §86.1232-X

XFo r vehicle s parke d out-o f Do . doors , requir e ga s cap off . Ga s cap optionall yo nwhe n parke d indoors , a t (a) . Remov e gasolin e vapo r generating equipmen t procedur e fo r loading canister s an

d replac e wit ha manufacture r recommendatio n fo r loading a t (a)(l)(iii ) (A)(1) . Add purpos e o f hea t build s t o coordinat e wit h(a)(1 ) (iii)(A)(2) . Specif ycaniste r disconnec tP. 9 procedur e an

d refueling i n (a)(l)(iii)(A)(2)(iii) . Add requiremen t t o plug vapo r line t o (a)(l)(iii ) (A)(2)(iv) . Replac e referenc e §86.078- 2 wit h referenc e §86.082-2 . Add "i n° F (or i n ° C fo r S I units)" , a t (a)(l)(iii)(A)(2)(x) . Us e commo n definitio n fo r breakthrough , a t (a)(l)(iii)(A)(2)(xi) . Add "uponcompletio n o f loading o f th e evaporativ e caniste r

connec t th e refueling canisters" , a t (a)(l)(iii)(A)(2)(xi) . Add "i f no t alread

y i n th e SHED " an

d "Remove th e fue l tank cap(s)" , 

### a t (aXlXiiiXBXl) . Us e commo n definitio n fo r breakthrough . Chang e 3- 4 gal/mi n t o 3- 5 gal/min . Add "I f th e vehicl e i s equippe d wit hdua l fue l tanks , eithe r fue l tank ma y b e fille d first" . Replac e "an

d draining o f th e fue l tank(s) " wit h"the vehicl e remove d withou t starting th e engine , an

d draining o f th e fue l tank(s)" . Add "the vehicl e move d int o th e SHE D withou t starting th e engine" , a t (a)(1 ) (iii)(B)(4) . Add "Vehicl e fueling . Withi n on e hou r o f loading th e canister(s ) t o breakthrough" , a t (a)(2) . Add "Dynamomete r Drive" , a t (a)(3) . Add "The vehicl e shal l b e store d fo r no t les s tha n 1 0 hour s no r fo r mor e tha n3 5 hour s prio r t o th e diurna l hea t build" , a t (b) .P . 1 0

17 . §86.1233-X

XRestructure . Add "(a ) Do . Vehicle s equippe d wit h full yintegrate d refueling emission s contro l systems" . Specif ycaniste r disconnec t procedur e am

d refueling a t (a)(6) . Remov e temperatur e specification s from(a)(8) . Correc t referenc e §86.078-2 , a t (a)(6) . Add requiremen t t o measur e an d record barometri c an d ambien t temperature s t o (a) . Add "i n° F (or i n C fo r S I units) " an d " + 1°F" , a t (a)(12) . Add paragraph(b) , Vehicle s equippe d wit hnon-integrate d an d partially-integrate d refueling emission s contro l systems . 18 . §86.1238-X

XAdd §86.1238-X

XDo , Incorporat e ne w paragraph(j) , requiring ga s cap removal . Clarif yparagraph(m) .

- l

-P.1 1

Fo r the reason s se t fort hi n th e preamble , 4 0 CF R Par t 8 6 i s propose d t o b e amende d a s follows :

Part * 8 6 - Contro l o f Ai r Pollutio n fromNe wMoto r Vehicle s an

d Ne wMoto r Vehicl e Engines : Certificatio n an d Tes t Procedures . l . Th e authorit ycitatio n fo r Par t 8 6 i s revise d t o read a s follows :

AUTHORITY : Section s 202 , 203 , 206 , 207 , 208 , 215 , an d 301(a ) o f th e Clea n Ai r Act , a s amended , 4 2 U.S.C . 7521 , 7522 , 7524 , 7525 , 7541 , 7542 , 7549 , 7550 , 7601(a )P.1 2

2 . Ane wSectio n86.XXX- 8 i s propose d t o b e adde d t o Subpar t A , t o read a s follows : §86.XXX- 8 Emissio n standard s fo r 19X Xan d late r mode l yea r light-dut yvehicles . (a)(1 ) Exhaus t emission s from19X Xan d late r mode l yea r light-dut yvehicle s shal l no t exceed : (i ) Hydrocarbons . 0.4 1 grampe r vehicl e mil e (0.25 5 gra mpe r vehicl e kilometer) . (ii ) Carbo nmonoxide . 3. 4 gram s pe r vehicl e mil e (2.1 1 gram s pe r vehicl e kilometer) . (iii ) Oxide s o f nitrogen . 1. 0 grampe r vehicl e mil e (0.62 9 gra

mpe r vehicl e kilometer) . (iv ) Particulat e emission s (diesel s only) . 0.2 0 gram pe r vehicl e mil e (0.12 4 gra mpe r vehicl e kilometer) . A manufacture r mayelec t t o includ e al l o r some o f it s diese l light-dut yvehicl e engin e familie s i n %he particulat e averaging program , provide d tha t vehicle s produce d fo r sal e i n Californi a o r designate d high-altitud e area s mayb e average d onl ywithi n eac ho f thes e areas . I f th e manufacture r elect s t o averag e diese l light-dut yvehicle s an d diese l light-dut ytruck s togethe r i n th e particulat e averaging program , it s composit e particulat e standar dP.1 3

applie s t o th e combine d se t o f diese l light-dut yvehicle s an d diese l light-dut ytruck s include d i nth e averag e an d i s calculate d a s define d i n §86.087-2 .

v (2 ) Th e standard s se t fort hi nparagraph(a)(1 ) o f thi s sectio n refe r t o th e exhaus t emitte d ove r a driving schedul e a s se t fort hi n Subpar t B o f thi s par t an d measure d an

d calculate d i n accordanc e wit hthos e procedures . (b)(1 ) Evaporativ e emission s from19X Xan d late r mode l yea r gasoline-fuele d light-dut yvehicle s shal l no t exceed : Hydrocarbons • 2. 0 gram s pe r test . (2 ) Th e standar d se t fort hi nparagraph(b)(1 ) o f thi s sectio nrefer s t o a composit e sampl e o f th e evaporativ e emission s collecte d unde r th e condition s se t fort hi nSubpar t B o f thi s par t an d measure d i naccordanc e wit hthos e procedures . (c ) N o crankcas e emission s shal l b e discharge d int o th e ambien t atmospher e fro man y19X Xan d late r mode l yea r gasoline-fuele d light-dut yvehicle . (d)(1 ) Refueling emission s from19X Xan d late r mode l yea r gasoline-fuele d ligh t dut yvehicle s shal l no t exceed : Hydrocarbons • 0.1 0 gram pe r gallo n(0.02 6 gra mpe r liter ) o f fue l dispensed .P.1 4

(2 ) Th e standard se t fort hi n paragraph(d)(1 ) o f thi s sectio nrefer s t o a sampl e o f refueling emission s collecte d unde r th e condition s se t fort hi nSubpar t C o f thi s partiand measure d i n accordanc e wit hthos e procedures . (e ) N o fue l vapo r shal l b e release d int o th e ambien t atmospher e froman y19x xan d late r mode l yea r gasoline-fuele d light-dut yvehicl e during an yin-us e operation s excep t fo r emergencie s cause d b ycomponen t malfunctio n o r damage . (f ) [Reserved ] (g ) Any19X

Xan d late r mode l yea r light-dut yvehicl e tha t a manufacture r wishe s t o certif yfo r sal e shal l mee t th e emissio nstandard s o f paragraph s (a)-(e ) o f thi s sectio n unde r bot hlow-an d high-altitud e condition s a s define d i n sectio n 86.082-2 , excep t a s provide d i n paragraph s (h ) an d (i ) o f thi s section . Vehicle s shal l mee t emissio nstandard s unde r bot hlow

- an d high-altitud e condition s withou t manua l adjustment s o r modifications . Anyemissio n contro l devic e use d t o mee t emissio nstandard s unde r high-altitud e condition s shal l initiall yactuat e (automatically ) n o highe r tha n4,00 0 fee t abov e se a level .P.1 5 (h ) Amanufacture r mayexemp t 19X Xmode l yea r vehicle s from

complianc e a t highaltitud e wit hth e emissio n standard s se t fort hi n paragraph s (a ) an d (b ) o f thi s sectio n i £ th e vehicle s ar e no t intende d fo r sal e a t high altitud e an

d i f th e requirement s o f paragraph s (h)(1 ) an d (2 ) o f thi s sectio n ar e met . (1 ) Avehicl e configuratio n shal l onl yb e considere d eligibl e fo r exemptio n unde r thi s paragraphi f th e requirement s o f eithe r paragraph(l)(i) , (ii) , (iii) , o r (iv ) o f thi s paragraphar e met . (i ) It s design parameter s (displacement-to-weigh t rati o (D/W ) an

d engin e speed-to-vehicle-spee d rati o (N/V ) fal l withi n th e exempte d rang e fo r tha t manufacture r fo r tha t year . Th e exempte d rang e i s determine d according t o th e following procedure : (A ) Th e manufacture r shal l graphicall ydisplayth e D/ Wan d N/ V dat a o f al l vehicl e configuration s i t wil l offe r fo r th e mode l yea r i n question . Th e axi s o f th e absciss a shal l b e D/ W(wher e (D ) i s th e engin e displacemen t expresse d i ncubi c centimeter s an d (W ) i s th e equivalen t vehicl e tes t weigh t expresse d i n pounds) , an d th e axi s o f th e ordinat e shal l b e N/ V (wher e (N ) i s th e crankshaf t spee d expresse d i nrevolution s pe r minut e an d (V ) i s th eP.1 6

vehicl e spee d expresse d i nmile s pe r hour) . A t th e manufacturer' s option , eithe r th e 1: 1 transmissio n gea r rati o o r th e lowes t numerica l gea r rati o availabl e i n th e transmissio n wil l b e use d t o determin e N/V . Th e gea r selectio n mus t b e th e same fo r al l N/ V dat a point s o nth e manufacturer' s graph . Fo r eac htransmission/axl e rati o combination , onl yth e lowes t N/ V valu e shal l b e use d i n th e graphica l display . (B ) Th e produc t line i s the ndefine d byth e

— 0 9 equation , N/ V

= C(D/W ) ' , wher e th e constant , C , i s determine d b

yth e requiremen t tha t al l th e vehicl e dat a point s eithe r fal l o n th e lin e o r li e t o th e uppe r righ t o f th e lin e a s displaye d o n th e graphs . (C ) Th e exemptio nlin e i s the n define d b yth e

— 0 9 equatio n N/ V

= C(0.8 4 D/W ) , wher e th e constan t C i s th e same a s tha t foun d i nparagrap h(h)(l)(i)(B ) o f thi s section . (D ) Th e exempte d rang e include s al l value s o f N/ V an d D/ Wwhic hsimultaneousl yfal l t o th e lowe r lef t o f th e exemptio n lin e a s draw n o n th e graph . (ii ) It s design parameter s fal l withi nth e alternat e exempte d rang e fo r tha t manufacture r tha t year . Th e alternat e exempte d rang e i s determine d b ysubstitutingP.1 7

rated horsepowe r (hp ) fo r displacemen t (D ) i n th e exemptio n procedur e describe d i n paragrap h(h)(1)(i ) o f thi s sectio n

— 0 9 an d b yusing th e produc t line N/ V = C(hp/W ) ' . (A ) Rate d horsepowe r shal l b e determine d byusin g th e Societ yo f Automotiv e Engineer s Tes t Procedur e J 1349 , o r an ysubsequen t versio no f tha t tes t procedure . Anyo f th e horsepowe r determinant s withi ntha t tes t procedur e ma y b e used , a s lon

g a s i t i s use d consistentl ythroughou t th e manufacturer' s produc t lin e i n an ymode l year . (B ) No exemption s wil l b e allowe d unde r paragrap h (h)(l)(ii ) o f thi s subsectio n t o an ymanufacture r tha t ha s exempte d vehicl e configuration s a s se t fort hi n paragrap h (h)(l)(i ) o f thi s section . (iii ) It s acceleratio n time (the time i t take s a vehicl e t o accelerat e from0 mile s pe r hou r t o a spee d no t les s tha n4 0 mile s pe r hou r an d no t greate r tha n5 0 mile s pe r hour ) unde r high-altitud e condition s i s greate r tha n th e larges t acceleratio ntime unde r low-altitud e condition s fo r tha t manufacture r fo r tha t year . Th e 'procedur e t o b e followe d i n making thi s determinatio nis : (A ) Th e manufacture r shal l lis t th e vehicl e configuratio n an

d acceleratio n time unde r low-altitud e condition s o f tha t vehicl e configuratio n whic hha s th eP.1 8

highes t acceleratio n tim e unde r low-altitud e condition s o f al l th e vehicl e configuration s i t wil l offe r fo r th e mode l yea r i n question . Th e manufacture r shal l als o submi t a descriptio no f th e methodologyuse d t o mak e thi s determination . (B ) Th e manufacture r shal l the nlis t th e vehicl e configuration s an

d acceleratio n time s unde r high-altitud e condition s o f al l thos e vehicl e configuration s whic hhav e highe r acceleratio n time s unde r high-altitud e condition s tha n th e highes t acceleratio n time a t lowaltitud e identifie d i nparagrap h(h)(1)(iii)(A ) o f thi s section . (iv ) I nlie u o f performing th e tes t procedur e o f paragraph s (h ) (1 ) (iii ) (A ) an d (B ) o f thi s section , it s acceleratio n tim e ca n b e estimate d base d o nth e manufacturer' s engineering evaluation , i naccordanc e wit h goo d engineering practice , t o mee t th e exemptio n criteri a o f paragraph(h)(l)(iii ) o f thi s section . (2 ) Avehicl e shal l onl yb e considere d eligibl e fo r exemptio n unde r thi s paragraphi f a t leas t on e configuratio n o f it s mode l typ e (an d transmissio n configuratio n i n th e cas e o f vehicle s equippe d wit hmanua l transmissions , excluding difference s du e t o th e presenc e o f overdrive ) i s certifie d t o mee t emissio n standard s unde r high-altitud e condition s a s specifie d i nparagraph s (a )P.1 9

throug h(g ) o f thi s section . Th e Certificat e o f Conformit y (the Certificate ) covering an yexempte d configuration(s ) wil l als o appl yt o th e corresponding non-exemp t configuration(s ) require d unde r thi s subparagraph . A s a conditio n t o th e exemption , an ysuspension , revocation , voiding , o r withdrawa l o f th e Certificat e a s i t applie s t o a nonexemp t configuratio n fo r an yreason wil l resul t i na suspensio no f th e Certificat e a s i t applie s t o th e corresponding exempte d configuration(s ) o f tha t mode l type , unles s ther e i s a t leas t on e othe r corresponding non-exemp t configuratio n o f th e same mode l typ e stil l covere d b yth e Certificate . Th e suspensio n o f th e Certificat e a s i t applie s t o th e exempte d configuration(s ) wil l b e terminate d whe n an yon e o f th e following occurs : (i ) Anothe r corresponding non-exemp t configuration(s ) receive(s ) coverag e unde r th e Certificate ; or (ii ) Suspensio n o f th e Certificat e a s i t applie s t o th e corresponding non-exemp t configuration(s ) i s terminated ; o r < (iii ) Th e Agency' s action(s) , wit hrespec t t o suspension , revocation , voiding o r withdrawa l o f th e Certificat e a s i t applie s t o th e corresponding non-exemp t configuration(s) , i s reversed .P.2 0

(3 ) Th e sal e o f a vehicl e fo r principa l us e a t a designate d high-altitud e locatio n tha t ha s bee n exempte d a s se t fort hi n thi s paragraphwil l b e considere d a violatio n o f Sectio n 203(a)(1 ) o f th e CleanAi r Act . (4 ) Th e manufacturer s mayexemp t 19X Xan d late r mode l yea r vehicle s fro mcomplianc e a t lowaltitud e wit h th e emissio n standard s se t fort hi n paragraph s (a ) an d (b ) o f thi s sectio ni f th e vehicles : (i ) Ar e no t intende d fo r sal e a t lo waltitude ; an

d (ii ) Ar e equippe d wit ha unique , high-altitud e axl e rati o (rear-whee l driv e vehicles ) o r a unique , high-altitud e drivetrai n(front-whee l driv e vehicles ) wit h a highe r N/ V

rati o tha n othe r configuration s o f tha t mode l typ e whic har e certifie d i ncomplianc e wit hth e emissio n standard s o f paragraph s (a ) an d (b ) o f thi s sectio nunde r low-altitud e conditions . (5 ) Th e sal e o f a vehicl e fo r principa l us e a t low altitud e tha t ha s bee n exempte d a s se t fort hi n paragrap h (h)(4 ) o f thi s sectio n wil l b e considere d a violatio no f sectio n 203(a)(1 ) o f th e Clea nAi r Act .

### t o 3 .

Subpar t 

### A A , 

### new t o Sec t read 

### io n as 8 6 foi l XXX ows : 

### - 9 i s propose d 

### t o be adde d P.2 1

f §86.XXX- 9 Emissio n standard s fo r 19X Xan d late r mode l yea r light-dut ytrucks . (a)(1 ) Th e standard s se t fort hi nparagraph s (a ) ari d (b ) o f thi s sectio n shal l appl yt o light-dut ytruck s sol d fo r principa l us e a t othe r tha n a designate d high-altitud e location . Exhaus t emission s fro m19X Xan d late r mode l yea r light-dut ytruck s shal l no t exceed : (i ) Hydrocarbons . 0.8 0 gra mpe r vehicl e mil e (0. 5 gra mpe r vehicl e kilometer) . (ii)(A ) Carbo n monoxide . 1 0 gram s pe r vehicl e mil e (6. 2 gram s pe r vehicl e kilometer) . (B ) 0.5 0 percen t o f exhaus t ga s flowa t curbidl e (gasoline-fuele d light-dut ytruck s only) . (iii ) Oxide s o f nitrogen . (A ) Fo r light-dut ytruck s up t o an

d including 3,75 0 lb s loade d vehicl e weight , 1. 2 gram s pe r vehicl e mil e (0.7 5 gram s pe r vehicl e kilometer) . (B ) Fo r light-dut ytruck s 3,75 1 lb s an d greate r loade d vehicl e weight , 1. 7 gram s pe r vehicl e mil e (l. l gram s pe r vehicl e kilometer) .(C ) Amanufacture r mayelec t t o includ e al l o r some

o f it s light-dut ytruc k engin e familie s i nth e N O averaging program , provide d tha t truck s produce d fo r sal e i n Californi a or designate d high-altitud e area s ma yb e average d onl ywithi neac ho f thos e areas . Diese l an d gasoline-fuele d engin e familie s mayno t b e average d together . I f th e manufacture r elect s t o averag e togethe r N O emission s o f light-dut ytruck s subjec t t o th e standard s o f paragraph s (a)(1)(iii)(A ) an d (a)(1)(iii)(B ) o f thi s section , it s composit e NOxstandar d applie s t o th e combine d fleet s o f light-dut ytruck s up t o an d including , an d over , 3,75 0 lbs loade d vehicl e weigh t include d i n th e averag e an

d i s calculate d a s define d i n §86.088-2 . (iv ) Particulat e emission s (diese l light-dut ytruck s only) . 0.2 6 gra

m pe r vehicl e mil e (0.1 6 grampe r vehicl e kilometer) . Amanufacture r mayelec t t o includ e al l o r some o f it s diese l light-dut ytruc k engin e familie s i n th e particulat e averaging progra mprovide d tha t truck s produce d for sal e i n Californi a o r i ndesignate d high-altitud e area s mayb e average d onl ywithi n eac ho f thos e areas . I f th e manufacture r elect s t o averag e bot hdiese l light-dut y vehicle s an

d diese l light-dut ytruck s togethe r i nth e particulat e averaging program , it s composit e particulat e standar d applie s t o th e combine d se t o f diese l light-dut y vehicle s an

d diese l light-dut ytruck s include d i n th e averag e an

d i s calculate d a s define d i n§86.085-2 .P.2 3 (2 ) Th e standard s se t fort hi nparagraph(a)(l)(i) , (a)(l)(ii)(A) , (aXD(iii) , an d (a)(l)(iv ) o f thi s sectio n refe r t o th e exhaus t emitte d ove r a driving schedul e a s se t

v fort hi n Subpar t B o f thi s par t an d measure d an

d calculate d i n accordanc e wit hthos e procedures . Th e standar d se t fort hi n paragraph(aXD(ii ) (B ) o f thi s sectio nrefer s t o th e exhaus t emitte d a t curbidl e an d measure d an

d calculate d i n accordanc e wit hth e procedure s se t fort hi n Subpar t P o f thi s part . (b)(1 ) Evaporativ e emission s fro m19X Xan d late r mode l yea r gasoline-fuele d light-dut ytruck s shal l no t exceed : Hydrocarbons . 2. 0 gram s pe r test . (2 ) Th e standard se t fort hi n paragraph(b)(1 ) o f thi s sectio n refer s t o a composit e sampl e o f th e evaporativ e emission s collecte d unde r th e condition s se t fort hi n Subpar t B o f thi s par t an d measure d i n accordanc e wit hthos e procedures . (c ) Th e standard s se t fort hi nparagraph s (c ) through(e ) o f thi s sectio n shal l appl yto ' al l light-dut y trucks . N o crankcas e emission s shal l b e discharge d int o th e ambien t atmospher e fro man y19X Xan d late r mode l yea r light-dut ytruck .P.2 4

(d)(1 ) Refueling emission s from19X Xan d late r mode l yea r gasoline-fuele d ligh t dut ytruck s shal l no t exceed : Hydrocarbons . 0.1 0 gra mpe r gallo n(0.02 6 gra mpe r liter ) o f fue l dispensed . (2 ) Th e standard se t fort hi n paragrap h(d)(1 ) o f thi s sectio n refer s t o a sampl e o f refueling emission s collecte d unde r th e condition s a s se t fort hi nSubpar t C o f thi s par t an

d measure d i naccordanc e wit hthos e procedures . (e ) N o fue l vapo r shal l b e release d int o th e ambien t atmospher e froman y19x

xan d late r mode l yea r gasoline-fuele d light-dut ytruc k during an yin-us e operation s excep t for emergencie s cause d b ycomponen t malfunctio n or damage . (f)(1 ) Mode l yea r 19X Xan d late r light-dut ytruck s sol d fo r principa l us e a t a designate d high-altitud e locatio n shal l b e capabl e o f meeting th e following exhaus t emissio n standard s whe n teste d unde r high-altitud e conditions : (i ) Hydrocarbons . 1. 0 gram s pe r vehicl e mil e (0.6 2 gram s pe r vehicl e kilometer) :P.2 5

(ii ) Carbo nMonoxide . (A ) 1 4 gram s pe r vehicl e mil e (8. 7 gram s pe r vehicl e kilometer) . (B ) \ 0.5 0 percen t o f exhaus t ga s flowa t curbidl e (gasoline-fuele d light-dut ytruck s only) . (iii ) Oxide s o f Nitrogen . (A ) Fo r light-dut ytruck s up t o an

d including 3,75 0 lb s loade d vehicl e weight , 1. 2 gram s pe r vehicl e mil e (0.7 5 gram s pe r vehicl e kilometer) . (B ) Fo r light-dut ytruck s 3,75 1 lb s an d greate r loade d vehicl e weight , 1. 7 gram s pe r vehicl e mil e (l. l gram s pe r vehicl e kilometer) . (iv ) Particulat e emission s (diese l light-dut ytruck s only) . 0.2 6 gra

mpe r vehicl e mil e (0.1 6 gra mpe r vehicl e kilometer) . (2 ) Th e standard s se t fort hi n paragraph(f)(l)(i) , (f)(l)(ii)(A) , (f)(l)(iii) , an d (f)(l)(iv ) o f thi s sectio n refe r t o th e exhaus t emitte d ove r a driving schedul e a s se t fort hi n Subpar t B o f thi s par t an d measure d an

d calculate d i n accordanc e wit hthos e procedures . Th e standar d se t fort hi n paragraph(f)(1)(ii)(B ) o f thi s sectio nrefer s t o th e exhaus t emitte d a t curbidl e an d measure d an

d calculate d i n accordanc e wit hth e procedure s se t fort hi n Subpar t P o f thi s part .P.2 6

(g)(1 ) Evaporativ e emission s from19X Xan d late r mode l yea r gasoline-fuele d light-dut ytruck s sol d fo r principa l us e a t a designate d high-altitud e locatio n shal l no t exceed : Hydrocarbons . 2. 6 gram s pe r tes t whe nteste d unde r high-altitud e conditions . (2 ) Th e standard se t fort hi n paragraph(g)(1 ) o f thi s sectio n refer s t o a composit e sampl e o f th e evaporativ e emission s collecte d unde r th e condition s se t fort hi n Subpar t B o f thi s par t an d measure d i n accordanc e wit hthos e procedures .(h)(1 ) An ylight-dut ytruc k tha t a manufacture r wishe s t o certif yfo r sal e a t lowaltitud e mus t b e capabl e o f meeting highaltitud e emissio n standard s (specifie d i n paragraph s (c ) through(g ) o f thi s section) . Th e manufacture r ma

yspecif yvehicl e adjustment s o r modification s t o allo wth e vehicl e t o mee t high-altitud e standard s bu t thes e adjustment s o r modification s ma yno t alte r th e vehicle' s basi c engine , inerti a weigh t class , transmissio n configuration , an d axl e ratio . (i ) Amanufacture r maycertif yuniqu e configuration s t o mee t th e high-altitud e standard s bu t i s no t require d t o certif ythes e vehicl e configuration s t o mee t th e low-altitud e standards . (ii ) An

yadjustment s o r modification s tha t ar e recommende d t o b e performe d o nvehicle s t o satisf yth e requirement s o f paragraph(h)(1 ) o f thi s section :P.2 8 (A ) Shal l b e capabl e o f being effectivel yperforme d b ycommercia l repai r facilities , an d (B ) "Mus t b e include d i nth e manufacturer' s applicatio n fo r certification . (2 ) Th e manufacture r mayexemp t 19X Xan d late r mode l yea r vehicle s fro

mcomplianc e wit hth e emissio nstandard s se t fort hin paragraph s (c ) through(g ) o f thi s sectio na t high-altitud e i f th e vehicle s ar e no t intende d fo r sal e a t highaltitud e an

d i f th e following requirement s ar e met . A vehicl e configuratio n shal l onl yb e considere d eligibl e fo r exemptio n i f th e requirement s o f eithe r paragrap h (k)(2)(i) , (ii) , (iii) , o r (iv ) o f thi s sectio nar e met . (i ) It s design parameter s (displacement-to-weigh t ratio ) (D/W ) an

d engin e speed-to-vehicle-spee d rati o (N/V) ) fal l withi nth e exempte d rang e fo r tha t manufacture r fo r tha t year . Th e exempte d rang e i s determine d according t o th e following procedure : (A ) Th e manufacture r shal l graphicall ydisplayth e D/ Wan d N/ V dat a o f al l vehicl e configuration s i t wil l offe r fo r th e mode l yea r i n question . Th e axi s o f th e absciss a shal l b e D/ W(wher e (D ) i s th e engin e displacemen tP.2 9

expresse d i n cubi c centimeter s an d (W ) i s th e gros s vehicl e weigh t (GVW ) expresse d i n pounds) , an d th e axi s o f th e ordinat e shal l b e N/ V (shar e (N ) i s th e crankshaf t spee d expresse d i n revolution s pe r minut e an d (V ) i s th e vehicl e speed expresse d i nmile s pe r hour) . A t th e manufacturer' s option , eithe r th e 1: 1 transmissio ngea r rati o or th e lowes t numerica l gea r rati o availabl e i n th e transmissio n wil l b e use d t o determin e N/V . Th e gea r selectio nmus t b e th e same for al l N/ V dat a point s o n th e manufacturer' s graph . Fo r eac htransmission/axl e rati o combination , onl y th e lowes t N/ V

valu e shal l b e use d i n th e graphica l display . (B ) Th e produc t lin e i s the ndefine d b yth e equatio n

— 0 9 N/ V = C(D/W ) , wher e th e constant , C , i s determine d by th e requiremen t tha t al l th e vehicl e dat a point s eithe r fal l o nth e lin e o r li e t o th e uppe r righ t o f th e lin e a s displaye d o nth e graphs . (C ) Th e exemptio n line i s the n define d b yth e

- 0 9 equation , N/ V

= C(0.8 4 D/W ) ' , wher e th e constant , C i s th e same a s tha t foun d i nparagraph(k)(2)(i)(B ) o f thi s section . (D ) Th e exempte d rang e include s al l value s o f N/ V an d D/ Wwhic hsimultaneousl yfal l t o th e lowe r lef t o f th e exemptio n line a s draw n o nth e graph .P.3 0

(ii ) It s desig n parameter s fal l withi n th e alternat e exempte d rang e fo r tha t manufacture r tha t year . Th e alternat e exempte d rang e i s determine d b ysubstitutin g rate d horsepowe r (hp ) fo r displacemen t (D ) i n th e exemptio n procedur e describe d i n paragraph(k)(2)(i ) o f thi s sectio n

- 0 9 an d b yusing the produc t line N/ V = C(hp/W ) (A ) Rate d horsepowe r shal l b e determine d byusin g th e Societ yo f Automotiv e Engineer s Tes t Procedur e J 1349 , o r an ysubsequen t versio no f tha t tes t procedure . Anyo f th e horsepowe r determinant s withi ntha t tes t procedur e ma y b e used , a s lon

g a s i t i s use d consistentl ythroughou t th e manufacturer' s produc t lin e i n an ymode l year . (B ) N o exemption s wil l b e allowe d unde r paragrap h (k)(2)(ii ) o f thi s sectio n t o an ymanufacture r tha t ha s exempte d vehicl e configuration s a s se t fort hi nparagrap h (k)(2)(i ) o f thi s section . (iii ) It s acceleratio ntime (the time i t take s a vehicl e t o accelerat e from 0 t o a spee d no t les s tha n4 0 mile s pe r hour an d no t greate r tha n5 0 mile s pe r hour ) unde r high-altitud e condition s i s greate r tha nth e larges t acceleratio n time unde r low-altitud e condition s fo r tha t manufacture r fo r tha t year . Th e procedur e t o b e followe d i n markin g thi s determinatio nis :P.3 1 (A ) Th e manufacture r shal l lis t th e vehicl e configuratio n an

d acceleratio n time unde r low-altitud e condition s o f tha t vehicl e configuratio n whic hha s th e highes t acceleratio n time unde r low-altitud e condition s o f al l the vehicl e configuration s i t wil l offe r fo r th e mode l yea r i n question . Th e manufacture r shal l als o submi t a descriptio n o f th e methodologyuse d t o mak e thi s determination . (B ) Th e manufacture r shal l the n lis t th e vehicl e configuration s an

d acceleratio ntime s unde r high-altitud e condition s o f al l thos e vehicl e configuration s whic hhav e highe r acceleratio n time s unde r high-altitud e condition s tha n th e highes t acceleratio n time a t lowaltitud e identifie d i nparagraph(k)(2)(iii)(A ) o f thi s section . (iv ) I nlie u o f performing th e tes t procedur e o f paragraph(k)(2)(iii ) o f thi s section , it s acceleratio n time can b e estimate d base d o n th e manufacturer' s engineering evaluation , i naccordanc e wit hgoo d engineering practice , t o mee t th e exemptio n criteri a o f paragrap h (k)(2)(iii ) o f thi s section . (3 ) Th e sal e o f a vehicl e fo r principa l us e a t a designate d high-altitud e locatio ntha t ha s bee n exempte d a s se t fort hi n paragraph(k)(2 ) o f thi s sectio n wil l b e considere d a violatio no f Sectio n203(a)(1 ) o f th e Clea n Ai r Act .P.3 2

4 . Ane wSectio n86.XXX-1 0 i s propose d t o b e adde d t o Subpar t A , t o read a s follows : §86.XXX-10 ; Emissio n standard s fo r 19X Xan d late r mode l yea r gasoline-fuele d heavy-dut yengine s an d vehicles . (a)(1 ) Exhaus t emission s fro mne w19X

Xan d late r mode l yea r gasoline-fuele d heavy-dut yengine s shal l no t exceed : (i ) Fo r engine s intende d fo r us e i nal l vehicle s excep t a s provide d i n paragraph(a)(3 ) o f thi s paragraph . (A ) Hydrocarbons . 1. 1 gram s pe r brak e horsepower-hou r (0.4 1 gra mpe r megajoule) , a s measure d unde r transien t operating conditions . (B ) Carbo nmonoxide . (1) 14. 4 gram s pe r brak e horsepower-hou r (5.3 6 gram s pe r megajoule) , a s measure d unde r transien t operating conditions . (2 ) Gasoline-fuele d heavy-dut yenqine s utilizin g aftertreatmen t technology . 0.5 0 percen t o f exhaus t ga s flowa t curbidle . , (C ) Oxide s o f nitrogen . (l) 6. 0 gram s pe r brak e horsepower-hou r (2. 2 gram s pe r megajoule) , a s measure d unde r transien t operating conditions .(ii ) Fo r engine s intende d fo r us e onl yi n vehicle s

wit ha Gros s Vehicl e Weigh t Rating o f greate r the n14,00 0 pounds , (A ) Hydrocarbons . 1. 9 gram s pe r brak e horsepower-hou r (0.7 1 gra mpe r megajoule) , a s measure d unde r transien t operating conditions . (B ) Carbo n Monoxide . (1. ) 37. 1 gram s pe r brak e hoursepower-hou r (13. 8 gram s pe r megajoule) , a s measure d unde r transien t operating conditions . (2 ) Gasoline-fuele d heavy-dut yengine s utilizing aftertreatmen t technology . 0.5 0 percen t o f exhaus t ga s flowa t curbidle . (C ) Oxide s o f nitrogen . 6. 0 gram s pe r brak e hoursepower-hou r (2. 2 gram s pe r megajoule) , a s measure d unde r transien t operating conditions . (2 ) Th e standard s se t fort hi nparagraph(a)(1 ) o f thi s sectio n refe r t o th e exhaus t emitte d ove r th e operating schedul e se t fort hi n paragraph(f)(1 ) o f Appendi xI t o thi s part , an d measure d an

d calculate d i n accordanc e wit hth e procedure s se t fort hi n Subpar t No r P .P.3 4

(3)(i ) Amanufacture r maycertif yon e o r mor e gasoline-fuele d heavy-dut yengin e configuration s intende d for us e i n al l vehicle s t o th e emissio nstandard s se t fort h i n paragraph(aXD(ii ) o f thi s paragraph : Provided , tha t the tota l mode l yea r sale s o f suc hconfiguration(s ) bein g certifie d t o th e emissio nstandard s i nparagrap h(a)(1)(ii ) o f thi s sectio n represen t no mor e tha n 5 percen t o f tota l mode l yea r sale s o f al l gasoline-fuele d heavy-dut yengine s intende d fo r us e i n vehicle s wit ha Gros s Vehicl e Weigh t Rating o f up t o 14,00 0 pound s b yth e manufacturer . (ii ) Th e configuration s certifie d t o th e emissio n standard s o f paragraph(a)(1)(H ) o f thi s sectio n unde r th e provision s o f paragraph(a)(3)(i ) o f thi s sectio nshal l stil l b e require d t o mee t th e evaporativ e emissio n standard s se t fort hi nparagraph s (b)(l)(i)(A ) an d (b)(2)(i ) o f thi s section . (b)(1 ) Evaporativ e emission s fro m19X Xan d late r mode l yea r gasoline-fuele d heavy-dut yvehicle s shal l no t exceed : (i ) Hydrocarbons . (A ) Fo r vehicle s wit ha Gros s Vehicl e Weigh t Rating o f up t o 14,00 0 pounds , 3. 0 gram s pe r test . (B ) Fo r vehicle s wit ha Gros s Vehicl e Weigh t Rating o f greate r tha n 14,00 0 pounds , 4. 0 gram s pe r test .P.3 5

(2)(i ) Fo r vehicle s wit ha Gros s Vehicl e Weigh t Rating o f u p t o 26,00 0 pounds , th e standard s se t fort hi n paragraph(b)(1 ) o f thi s sectio n refe r t o a composit e sampl e o f evaporativ e emission s collecte d unde r th e condition s se t fort hi nSubpar t Man d measure d i n accordanc e wit hthos e procedures . (ii ) Fo r vehicle s wit ha Gros s Vehicl e Weigh t Rating o f greate r than 26,00 0 pounds , th e standar d se t fort hi n paragraph(b)(1)(i)(B ) o f thi s sectio nrefer s t o th e manufacturer' s engineering design evaluatio n usin g goo d engineering practic e ( a statemen t o f whic hi s reguire d i n §86.088-23(b)(4)(ii)) . (c ) N o crankcas e emission s shal l b e discharge d int o th e ambien t atmospher e fro man yne w19X

Xo r late r mode l yea r gasoline-fuele d heavy-dut yengine . (d)(1 ) Refueling emission s fro m19X Xan d late r mode l yea r gasoline-fuele d heavy-dut yvehicle s shal l no t exceed : Hydrocarbons • 0.1 0 gra mpe r gallo n(0.02 6 gra mpe r liter ) o f fue l dispensed . , . (2)(i ) Fo r vehicle s wit ha Gros s Vehicl e Weigh t Ratin g o f up t o 26,00 0 pounds , th e standar d se t fort hi nparagrap h (d)(1 ) o f thi s sectio n refer s t o a sampl e o f refuelingP.3 6

emission s collecte d unde r condition s se t fort hi n Subpar t C o f thi s par t an d measure d i n accordanc e wit hthos e procedures . (ii ) Fo r vehicle s wit ha Gros s Vehicl e Weigh t Ratin g o f greate r tha n 26,00 0 pounds , th e standar d se t fort hi n paragraph(d)(1 ) o f thi s sectio nrefer s t o th e manufacturer' s engineering design evaluatio nusin g goo d engineering practic e ( a statemen t o f whic hi s require d i n §86.XXX-23(b)(4)(iv)) . (e ) N o fue l vapo r shal l b e release d int o th e ambien t atmospher e fro

m an y19x

xan d late r mode l yea r gasoline-fuele d heavy-dut yvehicl e during an yin-us e operation s excep t fo r emergencie s cause d b ycomponen t malfunctio n o r damage . (f ) Everymanufacture r o f ne wmoto r vehicl e engine s subjec t t o th e standard s prescribe d i n thi s sectio nshall , prio r t o taking an yo f th e action s specifie d i nsectio n 203(a)(1 ) o f th e Act , tes t o r caus e t o b e teste d moto r vehicl e engine s i n accordanc e wit happlicabl e procedure s i n Subpar t No r P o f thi s par t t o ascertai ntha t suc htes t engine s mee t th e requirement s o f paragraph s (a ) an d (c ) o f thi s section .5 . Ane wSectio n86.XXX-2 4 i s propose d t o b e adde d

t o subpar t At o read a s follows : §86.XXX-2l : Tes t vehicle s an d engines . (a)(1 ) Th e vehicle s or engine s covere d b yan applicatio nfor certificatio n wil l b e divide d int o grouping s o f engine s whic har e expecte d t o hav e simila r emissio n characteristic s throughou t thei r usefu l lives . Eac hgrou

p o f engine s wit hsimila r emissio ncharacteristic s shal l b e define d a s a separat e engin e family . (2 ) T o b e classe d i nth e same engin e family , engine s mus t b e identica l i n al l th e following respects : (i ) Th e cylinde r bor e center-to-cente r dimensions . (ii)-(iii ) Reserved ] (iv ) Th e cylinde r bloc k configuratio n (ai r coole d o r wate r cooled ; L-6 , 90 ° V-8 , etc.) . f (v ) Th e locatio no f th e intak e an d exhaus t valve s (or ports) . (vi ) Th e metho d o f ai r aspiration , (vii ) Th e combustio n cycle .P.3 8

(viii ) Catalyti c converte r characteristics , (ix ) Therma l reacto r characteristics .

'JL- (x ) Typ e o f ai r inle t coole r (e.g. , intercooler s an d after-coolers ) fo r diese l heavy-dut yengines . (3)(i ) Engine s identica l i n al l th e respect s liste d i n paragraph(a)(2 ) o f thi s sectio nma yb e furthe r divide d int o differen t engin e familie s i f th e Administrato r determine s tha t theymayb e expecte d t o hav e differen t emissio n characteristics . Thi s determinatio n wil l b e base d upo n a consideratio n o f th e following feature s o f eac h engine : (A ) Th e bor e an

d stroke . (B ) Th e surface-to-volume rati o o f th e nominall y dimensione d cylinde r a t th e to p dead cente r position . (C ) Th e intak e manifol d inductio n por t siz e an d configuration . (D ) Th e exhaus t manifol d por t siz e configuration . (E ) Th e intak e an d exhaus t valv e sizes .P.3 9 (F ) Th e fue l system . (G ) Th e camshaf t timing an d ignitio n o r injectio n timing characteristics . (ii ) Light-dut ytruck s an d heavy-dut yengine s produce d i n differen t mode l year s an d distinguishabl e i n the respect s listed i n paragraph(a)(2 ) o f thi s sectio n shal l b e treate d a s belonging t o a singl e engin e famil yi f the Administrato r require s it , afte r determining tha t th e engine s mayb e expecte d t o hav e simila r emissio n deterioratio n characteristics . (4 ) Wher e engine s ar e o f a typ e whic hcanno t b e divide d int o engin e familie s base d upo n th e criteri a liste d i n paragraph s (a ) (2 ) an d (3 ) o f thi s section , th e Administrato r wil l establis hfamilie s fo r thos e engine s base d upo nthos e feature s mos t relate d t o thei r emissio n characteristics . Engine s tha t ar e eligibl e t o b e include d i n th e same engin e famil ybase d o n th e criteri a i n paragraph s (a)(2 ) an d (3)(i ) o f thi s sectio nmayb e furthe r divide d int o differen t engin e familie s i f th e manufacture r determine s tha t theymayb e expecte d t o hav e differen t emissio ncharacteristics . Thi s determinatio nwil l b e base d upo n a consideratio no f th e following feature s o f eac h engine* ;(i ) Th e dimensio n fro mth e cente r lin e o f th e crankshaf t t o th e cente r line o f th e camshaft . (ii ) fTh e -dimension fro m the . cente r lin e o f th e crankshaf t t o th e top o f th e cylinde r bloc k head face . (iii ) Th e siz e o f th e intak e an d exhaus t valve s (or ports) . (5 ) Th e gasoline-fuele d light-dut yvehicle s an d light-dut ytruck s covere d b yan applicatio nfo r certificatio n wil l b e divide d int o grouping s whic har e expecte d t o hav e simila r evaporativ e emissio n characteristic s throughou t thei r usefu l life . Eac hgroup o f vehicle s wit hsimila r evaporativ e emissio n characteristic s shal l b e define d a s a separat e evaporativ e emissio n family . (6 ) Fo r gasoline-fuele d light-dut yvehicle s an d light-dut ytruck s t o b e classe d i nth e same evaporativ e emissio nfamily , vehicle s mus t b e simila r wit hrespec t to : (i ) Typ e o f vapo r storag e devic e (e.g. , canister , ai r cleaner , crankcase) . (ii ) Basi c caniste r design .P.4 1

(iii ) Fue l system . (7 ) Wher e vehicle s ar e o f a typ e whic hcanno t b e divide d int o evaporativ e emissio nfamilie s base d o nth e criteri a listed above , th e Administrato r wil l establis h familie s fo r thos e vehicle s base d upo n th e feature s mos t relate d t o thei r evaporativ e emissio ncharacteristics . (8)(i ) I f th e manufacture r elect s t o participat e i nth e Alternativ e Durabilit yProgram , th e engin e familie s covere d b ya n applicatio n fo r certificatio n shal l b e groupe d base d upo n simila r engin e designan d emissio ncontro l system characteristics . Eac ho f thes e group s shal l constitut e a separat e engin e famil ygroup . (ii ) T o b e classe d i n th e same engin e famil ygroup , engin e familie s mus t contai nengine s identica l i nal l o f th e following respects : (A ) Th e combustio n cycle . (B ) Th e cylinde r bloc k configuration , (air-coole d o r water-cooled ; L-6 , V-8 , rotary , etc.) . (C ) Displacemen t (engine s o f differen t displacemen t withi n 5 0 cubi c inche s o r 1 5 percen t o f th e larges t displacemen t an

d containe d withi na multidisplacemen tP.4 2

engin e famil ywil l b e include d i n th e same engin e famil y group) . (D ) r Catalyti c converte r usag e an d basi c typ e (noncatalyst , oxidatio n catalys t only , three-waycatalys t equipped) . (9 ) Engin e familie s identica l i nal l respect s liste d i n paragraph(a)(8 ) o f thi s sectio n mayb e furthe r divide d int o differen t engin e famil ygroup s i f th e Administrato r determine s tha t theyexpecte d t o hav e significantl y differen t exhaus t emissio ncontro l systemdeterioratio n characteristics . (10 ) Amanufacture r mayreques t th e Administrato r t o includ e i n a

nengin e famil ygroup , engin e familie s i n additio n t o thos e groupe d unde r th e provision s o f paragrap h (a)(8 ) o f thi s section . Thi s reques t mus t b e accompanie d b yth e informatio n th e manufacture r believe s support s th e inclusio n o f thes e additiona l engin e families . (11 ) Amanufacture r maycombin e int o , a singl e engin e famil ygrou

p thos e light-dut yvehicl e an d light-dut ytruc k engin e familie s whic hotherwis e mee t th e requiremen t o f paragraph s (a)(8 ) through(10 ) o f thi s section .(12 ) Th e gasoline-fuele d heavy-dut yvehicle s covere d

b yan applicatio n fo r certificatio n wil l b e divide d int o grouping s o f vehicle s o n th e basi s o f physica l feature s whic hare-expecte d t o affec t evaporativ e emissions . Eac h grou p o f vehicle s wit hsimila r feature s shal l b e define d a s a separat e evaporativ e emissio n family . (13 ) Fo r gasoline-fuele d heavy-dut yvehicl e t o b e classe d i n th e same evaporativ e emissio nfamily , vehicle s mus t b e identica l wit hrespec t to : (i ) Metho d o f fuel/ai r metering (i.e.,carburetio n versu s fue l injection) . (ii ) Carbureto r bow l fue l volume , withi na 1 0 c c range . (14 ) Fo r gasoline-fuele d heavy-dut yvehicle s t o b e classe d i n th e same evaporativ e emissio ncontro l system , vehicle s mus t b e identica l wit hrespec t to : (i ) Metho d o f vapo r storage . (ii ) Metho d o f carbureto r sealing . (iii ) Metho d o f ai r cleane r sealing .P.4 4

(iv ) Vapo r storag e working capacity , withi na 20 g range . (v ) Numbe r o f storag e devices . (vi ) Metho d o f purging store d vapors . (vii ) Metho d o f venting th e carbureto r during bot h engin e of f an

d engin e operation . (viii ) Liqui d fue l hos e material . (ix ) Vapo r storag e material . (15 ) Wher e gasoline-fuele d heavy-dut yvehicle s ar e type s whic hcanno t b e divide d int o evaporativ e emissio n family-contro l system combination s base d o n th e criteri a liste d above , th e Administrato r wil l establis hevaporativ e emissio n family-contro l system combination s fo r thos e vehicle s base d o n feature s mos t relate d t o thei r evaporativ e emissio ncharacteristics . (16 ) Th e gasoline-fuele d light-dut yvehicles , gasoline-fuele d light-dut ytruck s an d gasoline-fuele d heavy-dut yvehicle s covere d b yan applicatio nfo r certificatio n wil l b e divide d int o grouping s whic har e expecte d t o hav e simila r refueling emissio n characteristic sP.4 5

throughou t thei r usefu l life . Eac hgrou p o f vehicle s wit h simila r refueling-emissio n characteristic s shal l b e define d a s a separat e refueling emissio nfamily . (17 ) Fo r vehicle s t o b e classifie d i nth e same refueling emissio n family , vehicle s mus t b e identica l i n al l o f th e following respects : (i ) Typ e o f contro l system- non-integrated , partiall yintegrated , o r full yintegrate d wit hth e evaporativ e contro l system . Further , i f th e systemi s partiall yintegrated , whethe r th e diurna l o r ho t soak emission s ar e capture d i n th e same storag e devic e a s th e refueling emissions . (ii ) Basi c caniste r design . (A ) Working capacit y- gram s adsorptio nwithi na lOg range . (B ) Systemconfiguratio n - numbe r o f canister s an d metho d o f connectio n(i.e. , series , parallel,) . (iii ) Fillpip e sea l mechanis m- mechanical , liqui d trap , other . (iv ) Fil l limite r system .P.4 6 (v ) Vapo r contro l systemo r metho d o f controlling vapo r flowthroughth e vapo r line t o th e canister . (18 ) 'Vehicle s whic hdiffe r i n th e parameter s liste d i n (a ) (17 ) above mayb e judge d b yEPAt o b e equivalen t (i.e . belonging t o th e sam e refueling emissio n family ) base d o n a revie wo f dat a submitte d t o EPAb yth e manufacture r i n suppor t o f a clai mo f vehicl e equivalency . (19 ) Vehicle s wil l b e classifie d a s having th e same refueling emissio n contro l systemi f theyar e identica l i n al l o f th e following respects : (i ) Caniste r adsorptiv e materia l - type , size , an d quantity . (ii ) Caniste r configuratio n - purg e an d ven t mechanism , ope nbottom , close d bottom , an d geometry . (iii ) Purg e systemconfiguration : (A ) Purg e techniqu e - controlle d o r uncontrolled . (B ) Metho d o f contro l (e.g . electrical , vacuum) . (C ) Conditioning o f purg e ai r (e.g . heated , dried) .(vi ) I f 9 0 percen t or mor e o f th e engin e famil ysale s

wil l b e i n California , a manufacture r maysubstitut e emission-dat a vehicle s selecte d b yth e Californi a Ai r Resource s ^Boar

d criteri a fo r th e selection s specifie d i n paragraph s (b)(l)(i) , (bXD(ii) , an d (b)(l)(iv ) o f thi s section . (vii)(A ) Vehicle s o f eac hevaporativ e emissio nfamil y wil l b e divide d int o evaporativ e emissio n contro l systems . (B ) Th e Administrato r wil l selec t th e vehicl e expecte d t o exhibi t th e highes t evaporativ e emissions , from withi n eachevaporativ e famil yt o b e certified , fromamong th e vehicle s represente d b yth e exhaus t emission-dat a selection s fo r the engin e family , unles s evaporativ e testing ha s alread ybee ncomplete d o nth e vehicl e expecte d t o exhibi t th e highes t evaporativ e emission s fo r th e evaporative famil ya s par t o f anothe r engin e family' s testing . (C ) I f th e vehicle s selecte d i naccordanc e wit h paragraph(b)(1)(vii)(B ) o f thi s sectio n d o no t represen t eac hevaporativ e emissio n contro l systemthe nth e Administrato r wil l selec t th e highes t expecte d evaporativ e emissio n vehicl e fro mwithi nth e unrepresente d evaporativ e system .P.4 8



### (viii ) Fo r high-altitud e evaporativ e emissio n compliance ' fo r eac hevaporativ e emissio nfamily , th e manufacture r shal l follo won e o f th e followin g procedures : (A ) Th e manufacture r wil l selec t fo r testin g unde r high-altitud e condition s th e on e nonexemp t vehicl e previousl yselecte dunde r paragrap h(b)(l)(vii)(B ) o r (C ) o f thi s sectio nwhic hi s expecte dt o hav e th e highes t leve l o f evaporativ e emission s whe noperate da t hig haltitude , o r (B ) I nlie u o f testin g vehicle s accordin g t o paragrap h(A ) o f thi s section , a manufacture r ma yprovid e a statemen t i nit s applicatio nfo r certificatio ntha t base d o nth e manufacturer' s engineerin g evaluatio no f suc h high-altitud e emissio ntestin g a s th e manufacture r deem s appropriate , ( 1 ) Tha t al l light-dut yvehicle s no t exemp t unde r §86.XXX-8(h ) compl ywit hth e emissio nstandard s a t hig h altitude , and (2 ) Tha t light-dut ytruck s sol dfo r principa l us e a t designate dhigh-altitud e location s compl ywit hth e high-altitud e emissio nrequirements , andtha t al l light-dut ytruck s sol da t lo waltitude , whic har e no t exemp t unde r §86.XXX-9(h)(2) , ar e capabl e o f bein g modifie d t o mee t high-altitud e standards .P.4 9 (v ) Fo r high-altitud e exhaus t emissio ncomplianc e fo r eac hengin e family , th e manufacture r shal l follo won e o f th e following procedures : (A ) Th e manufacture r wil l selec t fo r testing unde r high-altitud e condition s th e vehicl e expecte d t o exhibi t th e highes t emission s fro mth e nonexemp t vehicle s selecte d i n accordanc e wit hparagraph s (b)(1 ) (ii) , (iii) , an d (iv ) o f thi s sectio n or , (B ) I n lieu o f testing vehicle s according t o paragraph(b)(l)(v)(A ) o f thi s section , a manufacture r may provid e a statemen t i n it s applicatio nfo r certificatio n that , base d o n the manufacturer' s engineering evaluatio n o f suc hhigh-altitud e emissio ntesting a s th e manufacture r deem s appropriate , (_1 ) Tha t al l light-dut yvehicle s no t exemp t unde r §86.XXX-8(h ) compl ywit hth e emissio nstandard s a t high altitude , an

d (2 ) Tha t light-dut ytruck s sol d fo r principa l us e a t designate d high-altitud e location s compl ywit hth e high-altitud e emissio n requirements , an d tha t al l light-dut ytruck s sol d a t lowaltitude , whic har e no t exemp t unde r §86.XXX-9(h)(2) , ar e capabl e o f being modifie d t o mee t high-altitud e standards .(ix ) Vehicle s selecte d unde r paragraph(b)(l)(v)(A )

o f thi s sectio n mayb e use d t o satisf yth e requirement s o f (b)(l)(viii)(A ) o f thi s section . (x)(A ) Vehicle s o f eac hrefueling emissio nfamil ywil l b e divide d int o refueling emissio ncontro l systems . (B ) The Administrato r wil l selec t th e vehicl e expecte d t o exhibi t th e highes t refueling emission s from withi n eac hrefueling famil yt o b e certifie d fromamong th e vehicle s represente d byexhaus t emission-dat a selection s fo r th e engin e family , unles s refueling emissio n testing ha s alread

ybee n complete d o n th e vehicl e expecte d t o exhibi t th e highes t refueling emissio nfo r th e refueling famil ya s par t o f anothe r engin e famil ytesting . (C ) I f th e vehicle s selecte d i naccordanc e wit h paragraph(b)(l)(xi)(B ) o f thi s sectio nd o no t represen t eac hrefueling emissio n contro l system , the n th e Administrato r wil l selec t th e highes t expecte d refueling emissio n vehicl e fromwithi nth e unrepresente d system . ! ' (xi ) Fo r high-altitud e refueling emissio ncomplianc e fo r eac hrefueling emissio nfamily , th e manufacture r shal l followon e o f th e following procedures :P.5 1

highes t numerica l fina l gea r rati o (including overdrive) , th e highes t numerica l axl e rati o offere d i ntha t engin e famil yan

d th e maximu

mfue l flowcalibration . (ii ) Th e Administrato r shal l selec t on e additiona l tes t vehicl e fro

mwithi n eac hengin e family . Th e vehicl e selecte d shal l b e th e vehicl e expecte d t o exhibi t th e highes t emission s o f thos e vehicle s remaining i nth e engin e family . I f al l vehicle s withi n th e engin e famil yar e simila r th e Administrato r maywaiv e th e requirement s o f thi s paragraph . (iii ) Withi n anengin e famil yan d exhaus t emissio n contro l system , th e manufacture r mayalte r an y emission-dat a vehicl e (or othe r vehicle s suc ha s including curren t o r previou s mode l yea r emission-dat a vehicles , fue l econom ydat a vehicles , an d developmen t vehicle s provide d theymee t emission-dat a vehicles ' protocol ) t o represen t mor e tha n on e selectio nunde r paragraph(b)(1 ) (i) , (ii) , (iv) , o r (vii ) o f thi s section . (iv ) I f th e vehicle s selecte d i n.accordanc e wit h paragraph s (b)(1 ) (i ) an d (ii ) o f thi s sectio nd o no t represen t eac hengine-systemcombination , the non e vehicl e o f eac hengine-systemcombinatio nno t represente d wil l b e selecte d b

yth e Administrator . Th e vehicl e selecte d shal l b e th e vehicl e expecte d t o exhibi t th e highes t emission s o f thos e vehicle s remaining i n th e engin e family .P.5 2

(iv ) Purg e strateg y(e.g. , rate , schedule ) an d poin t o f inductio n (e.g. , carbureto r o r throttl e body , intak e manifold , ai r cleaner) . (v ) Vapor/liqui d separato r usage . (20 ) Vehicle s whic hdiffe r i n th e parameter s liste d i n §86.XXX-2 4 (a)(19 ) above mayb e judge d b yEP At o b e essentiall yequivalen t (i.e. , having th e same refueling emissio n contro l system ) base d o n a reviewo f dat a submitte d t o EPAb yth e manufacture r i nsuppor t o f a clai m o f equivalency . (b ) Emissio n data : (1 ) Emission-dat a vehicles . Paragraph(b)(1 ) o f thi s sectio n applie s t o light-dut yvehicl e an d light-dut y truc k emission-dat a vehicles . (i ) Vehicle s wil l b e chose nt o b e operate d an d teste d fo r emissio n dat a base d upo n engin e family , on e tes t vehicl e wil l b e selecte d base d o nth e following criteria : Th e Administrato r shal l selec t th e vehicl e wit hth e heavies t equivalen t tes t weigh t (including options ) withi n th e family . The nwithi n tha t vehicl e th e Administrato r shal l select , i n th e orde r listed , th e highes t road-loa d power , larges t displacement , th e transmissio n wit hth e(A ) Th e manufacture r wil l selec t fo r testing unde r

high-altitud e condition s th e on e nonexemp t vehicl e previousl yselecte d unde r paragraph(b)(l)(x)(B ) o r (C ) o f thi s sectio n whic hi s expecte d t o hav e th e highes t leve l o f refueling emission s whe n operate d a t highaltitud e o r (B ) I n lie u o f testing vehicle s according t o paragraph(A ) o f thi s section , a manufacture r mayprovid e a statemen t i nit s applicatio nfo r certificatio n tha t base d o n the manufacturer' s engineering evaluatio no f suc h high-altitud e emissio ntesting a s th e manufacture r deem s appropriate , (1 ) Tha t al l light-dut yvehicle s no t exemp t unde r §86.XXX-8(i ) compl ywit hth e emissio nstandard s a t hig h altitude , an

d (2 ) Tha t light-dut ytruck s sol d fo r principa l us e a t designate d high-altitud e location s compl ywit hth e high-altitud e emissio n requirements , an d tha t al l light-dut ytruck s sol d a t lowaltitude , whic har e no t exemp t unde r §86.XXX-9(h)(2) , ar e capabl e o f being modifie d t o mee t high-altitud e standards . (xii ) Vehicle s selecte d unde r paragraph s (b)(l)(v)(A ) o r (b)(1)(vii)(A ) o f thi s sectio n mayb e use d t o satisf y th e requirement s o f (b)(l)(xi)(A ) o f thi s section .P.5 4

(xiii ) (Liqht-Dut yTruck s Only) : (A ) Th e manufacture r mayreconfigur e an yo f th e low-altitud e emission-dat a vehicle s t o represen t th e vehicl e configuratio n require d t o b e teste d a t highaltitude . (B ) Th e manufacture r i s no t require d t o tes t th e reconfigure d vehicl e a t lowaltitude . (2 ) Gasoline-fuele d heavy-dut yemission-dat a engines . Paragraph(b)(2 ) o f thi s sectio n applie s t o gasoline-fuele d heavy-dut yengines . (i)-(ii ) [Reserved ] (iii ) Th e Administrato r shal l selec t a maximu mo f tw o engine s withi n eac hengin e famil ybase d upo nfeature s indicating tha t the ymayhav e th e highes t emissio n level s o f th e engin e i n th e engin e famil ya s follows : (A ) Th e Administrato r shal l selec t on e emission-dat a engin e firs t base d o n th e larges t displacemen t withi nth e engin e family . The nwithi n the larges t displacemen t the Administrato r shal l select , i norde r listed , highes t fue l flowa t th e spee d o f maximu mrate d torque , th e engin e wit h th e mos t advance d spar k timing , larges t evaporativ e and/o r refueling emission s canister , n o EGRo r lowes t actua l flo w ai r pump .P.5 5 (B ) Th e Administrato r shal l selec t on e additiona l engine , fromwithi n eac hengin e family . Th e engin e selecte d shal l b e th e engin e expecte d t o exhibi t th e highes t emission s o f thos e engine s remaining i nth e engin e family . I f al l engine s withi n th e engin e famil yar e simila r th e Administrato r maywaiv e th e requirement s O f thi s paragraph . (iv ) I f the engine s selecte d i naccordanc e wit h paragraph s (b)(2 ) (ii ) an d (iii ) o f thi s sectio nd o no t represen t eac hengin e displacement-exhaus t emissio ncontro l systemcombination , the n on e engin e o f eac hengin e displacement-exhaus t emissio ncontro l systemcombinatio n no t represente d shal l b e selecte d b yth e Administrator . (v ) Withi nan engin e family/displacement/contro l systemcombination , th e manufacture r ma yalte r an y emission-dat a engin e (or othe r engin e including curren t o r previou s mode l yea r emission-dat a engine s an d developmen t engine s provide d the ymee t th e emission-dat a engines ' protocol ) t o represen t mor e tha non e selectio n unde r paragraph(b)(2)(iii ) o f thi s section . (3 ) Diese l heavy-dut yemission-dat a engines . Paragraph(b)(3 ) o f thi s sectio napplie s t o diese l heavy-dut yemission-dat a vehicles .P.5 6 (i ) Engine s wil l b e chose n t o b e ru nfo r emissio n dat a base d upo n engin e famil ygroupings . Withi neac h engin e family , th e requirement s o f thi s paragraphmus t b e met . •• | (ii ) Engine s o f eac hengin e famil ywil l b e divide d int o group s base d upo n thei r exhaus t emissio ncontro l systems . On e engin e o f eac hengin e systemcombinatio n shal l b e ru

nfo r smok e emissio ndat a an d gaseou s emissio n dat a (including dat a fo r particulat e matter) . Eithe r th e complet e gaseou s emissio n tes t o r th e complet e smok e tes t mayb e conducte d first . Withi n eac hcombination , th e engin e tha t feature s th e highes t fue l feed pe r stroke , primaril ya t th e spee d o f maximu mrate d torqu e an d secondaril ya t rate d speed , wil l usuall yb e selected . I f ther e ar e militaryengine s wit hhighe r fue l rate s tha n othe r engine s i n th e same engin e systemcombinations , the n on e militaryengin e shal l als o b e selected . Th e engin e wit hth e highes t fue l feed pe r strok e wil l usuall yb e selected . (iii ) Th e Administrato r mayselec t a ^maximu mo f on e additiona l engin e withi neac hengine-systemcombinatio n base d upo n feature s indicating tha t i t mayhav e th e highes t emissio n level s o f th e engine s o f tha t combination . I n selecting thi s engine , th e Administrato r wil l conside r suc hfeature s a s th e injectio n system , fue l system , compressio n

ratio , rated speed , rate d horsepower , peak torqu e speed , an d pea k torque . (iv ) Withi nanengin e famil ycontro l system combination , th e manufacture r mayalte r an yemission-dat a engin e (or othe r engin e sucha s including curren t o r previou s mode l yea r emission-dat a engine s an d developmen t engine s provide d theymee t th e emission-dat a engines ' protocol ) t o represen t mor e tha non e selectio nunde r paragraph s (b)(3)(ii ) an d (iii ) o f thi s section . (c ) Durabilit ydata : (1 ) Light-dut yvehicl e durability-dat a vehicles . Paragraph(c)(1 ) o f thi s sectio n applie s t o light-dut yvehicl e durability-dat a vehicles . (i ) Adurability-dat a vehicl e wil l b e selecte d b y th e Administrato r t o represen t eac hengine-system combination . Th e vehicl e selecte d shal l b e o f th e engin e displacemen t wit hth e larges t projecte d sale s volum e o f vehicle s wit htha t control-systemcombinatio ni n tha t engin e famil yan

d wil l b e designate d b yth e Administrato r a s t o transmissio n type , fue l system , inerti a weigh t class , an d tes t weight . (ii ) Amanufacture r mayelec t t o operat e an d tes t additiona l vehicle s t o represen t an yengine-system combination . Th e additiona l vehicle s mus t b e o f th e sameP.5 8

engin e displacement , transmissio n type , fue l systeman d inerti a weigh t clas s a s th e vehicl e selecte d fo r tha t engine-systemcombinatio ni n accordanc e wit hth e provision s o f th e paragrap h(c)(1)(i ) o f thi s section . Notic e o f an inten t t o operat e an d tes t additiona l vehicle s shal l b e give n t o th e Administrato r n o late r tha n3 0 day s following notificatio n o f th e tes t flee t selection . (2 ) L i ght-dut yt rucks . Paragraph(c)(2 ) o f thi s sectio n applie s t o vehicles , engines , subsystems , o r component s use d t o establis hexhaus t emission s deterioratio n factor s fo r light-dut ytrucks . (i ) Th e manufacture r shal l selec t th e vehicles , engines , subsystems , or component s t o b e use d t o determin e exhaus t emissio n deterioratio n factor s fo r eac h engine-famil ycontro l systemcombination . Whethe r vehicles , engines , subsystems , o r component s ar e used , the y shal l b e selecte d s o tha t thei r emission s deterioratio n characteristic s mayb e expecte d t o represen t thos e o f in-us e vehicles , base d o n goo d engineering judgment .

f ' (3 ) Heavy-dut yengines . Paragraph(c)(3 ) o f thi s sectio napplie s t o engines , subsystems , o r component s use d t o establis hexhaus t emissio n deterioratio nfactor s fo r heavy-dut yengines .P.5 9 (i ) Th e manufacture r shal l selec t th e engines , subsystems , o r component s t o b e use d t o determin e exhaus t emissio n deterioratio n factor s fo r eac hengine-famil y contro l systemcombination . Whethe r engines , subsystems , o r component s ar e used , theyshal l b e selecte d s o tha t thei r emission s deterioratio n characteristic s mayb e expecte d t o represen t thos e o f in-us e engines , base d o n goo d engineering judgment . (d ) Fo r purpose s o f testing unde r §86.084-2 6 (a)(9 ) o r (b)(ll) , th e Administrato r mayrequir e additiona l emission-dat a vehicle s (or emission-dat a engines ) an d durability-dat a vehicle s (light-dut yvehicle s only ) identica l i nal l materia l respect s t o vehicle s (or engines ) selecte d i n accordanc e wit hparagraph s (b ) an d (c ) o f thi s section , provided , tha t th e numbe r o f vehicle s (or engines ) selecte d shal l no t increas e th e siz e o f eithe r th e emission-dat a flee t bymor e tha n2 0 percen t o r on e vehicl e (or engine) , whicheve r i s greater . (e)(1 ) An

ymanufacture r whos e projecte d sale s fo r th e mode l yea r i nwhic hcertificatio n i s sough t }.sles s than : (i ) 2,00 0 gasoline-fuele d light-dut yvehicles , o r (ii ) 2,00 0 diese l light-dut yvehicles , o rP.6 0

(iii ) 2,00 0 gasoline-fuele d light-dut ytrucks , o r (iv ) 2,00 0 diese l light-dut ytrucks , o r (v ) 2,00 0 gasoline-fuele d heavy-dut yengines , o r (vi ) 2,00 0 diese l heavy-dut yengines , mayreques t a reductio n i n th e numbe r o f tes t vehicle s (or engines ) determine d i n accordanc e wit hth e foregoing provision s o f thi s section . Th e Administrato r mayagre e t o suc hlesse r numbe r a s h e determine s woul d mee t th e objective s o f thi s procedure . (2 ) An

ymanufacture r mayreques t t o certif yengin e familie s wit hcombine d tota l sale s o f fewe r tha n10,00 0 light-dut yvehicles , light-dut ytrucks , an d heavy-dut y engine s utilizing assigne d deterioratio nfactor s prescribe d b yth e Administrator . Th e assigne d deterioratio n factor s shal l b e applie d onl yt o entir e engin e families . (f ) I n lie u o f testing anemission-dat a o r durabilit yvehicl e (or engine ) selecte d unde r paragrap h(b ) o r (c ) o f thi s section , an d submitting dat a therefor , a manufacture r may , wit hth e prio r writte napprova l o f th e Administrator , submi t exhaus t emissio n data , evaporativ e emissio n dat a and/o r refueling emissio ndata , a s applicabl e o n a simila r vehicl e (or engine ) fo r whic hcertificatio nP.6 1

ha s bee n obtaine d o r fo r whic hal l applicabl e dat a require d unde r §86.XXX-2 3 ha s previousl ybee n submitted . (g)(1 ) | Thi s paragraphapplie s t o light-dut yvehicle s an d light-dut ytrucks , bu t doe s no t appl yt o th e productio n vehicle s selecte d unde r paragraph(h ) o f thi s section . (2)(i ) Wher e i t i s expecte d tha t mor e tha n3 3 percen t o f a carline , withi n anengine-systemcombination , ma yb e equippe d wit han item(whethe r tha t ite mi s standar d equipmen t o r a

noption) , th e ful l estimate d weigh t o f tha t ite mshal l b e include d i nth e curbweigh t computatio n o f eac hvehicl e availabl e wit htha t itemi ntha t carline , withi n tha t engine-systemcombination . (ii ) Whe n i t i s expecte d tha t 3 3 percen t o r les s o f th e carline , withi nan engine-systemcombination , wil l b e equippe d wit ha

n item(whethe r tha t ite mi s standar d equipmen t o r anoption ) n o weigh t fo r tha t ite mwil l b e added i n computing th e curbweigh t fo r an yvehicl e i n th e carline , withi n tha t engine-systemcombination , unles s tha t ite mi s standar d equipmen t o nth e vehicle . , (iii ) I nth e cas e o f mutuall yexclusiv e options , onl y th e weigh t o f th e heavie r optio n wil l b e adde d i ncomputing th e curbweight .P.6 2

(iv ) Optiona l item s weighing les s thanthre e pound s pe r ite m nee d no t b e considered . (3)(i ) V

wher e i t i s expecte d tha t mor e tha n 3 3 percen t o f a carline , withi n anengine-systemcombination , wil l b e equippe d wit han ite m(whethe r tha t ite mi s standar d equipmen t or an option ) tha t ca nreasonabl yb e expecte d t o influenc e emissions , the n suc hitems shal l actuall yb e installe d (unles s exclude d unde r paragraph(g)(3)(ii ) o f thi s section ) o n al l emission-dat a an d durability-dat a vehicle s o f tha t carline , withi n tha t engine-system combination , o n whic hth e items ar e intende d t o b e offere d i n production . Items tha t ca nreasonabl yb e expecte d t o influenc e emission s are : ai r conditioning , powe r steering , powe r brakes , an d othe r items determine d b yth e Administrator . (ii ) I f th e manufacture r determine s b ytes t dat a o r engineering evaluatio n tha t th e actua l installatio n o f th e optiona l equipmen t require d b yparagraph(g)(3)(i ) o f thi s sectio ndoe s no t affec t th e emission s o r fue l econom y values , th e optiona l equipmen t nee d no t b e installe d o nth e tes t vehicle . (iii ) Th e weigh t o f th e option s shal l b e include d i n th e design curbweigh t an d als o b e represente d i nth e weigh t o f th e tes t vehicles .P.6 3

(iv ) Th e engineering evaluation , including an ytes t data , use d t o suppor t th e deletio no f optiona l equipmen t fro mth e tes t vehicles , shal l b e maintaine d b yth e manufacture r an

d shal l b e mad e availabl e t o th e Administrato r upo n request . (4 ) Wher e i t i s expecte d tha t 3 3 percen t o r les s o f a carlin e withi na nengine-systemcombinatio nwil l b e equippe d wit han ite m(whethe r tha t ite mi s standar d equipmen t o r an option ) tha t ca n reasonabl yb e expecte d t o influenc e emissions , tha t ite mshal l no t b e installe d o n an yemission-dat a vehicl e or durability-dat a vehicl e o f tha t carline , withi ntha t engine-systemcombination , unles s tha t itemi s standar d equipmen t o ntha t vehicl e o r specificall yrequire d b yth e Administrator . (h ) Alternativ e Durabilit yProgra mdurability-dat a vehicles . Thi s sectio n applie s t o light-dut yvehicl e an d light-dut ytruc k durability-dat a vehicle s selecte d unde r th e Alternativ e Durabilit yProgra mdescribe d i n §86.085-13 . (1 ) I n orde r t o updat e th e durabilit ydat a t o b e use d t o determin e a deterioratio nfacto r fo r eac hengin e famil ygroup , th e Administrato r wil l selec t durability-dat a vehicle s fromth e manufacturer' s productio nline . Productio nvehicle s wil l b e selecte d from eac hmode l year' sproductio n fo r thos e vehicle s certifie d usin g th e

Alternativ e Durabilit yProgramprocedures . (i ) o. : Th e Administrato r shal l selec t th e productio n durability-dat a vehicl e design s fromth e design s tha t th e manufacture r offer s fo r sale . Fo r eac hmode l yea r an d fo r eac hengin e famil ygroup , th e Administrato r mayselec t productio ndurability-dat a vehicl e design s o f equa l numbe r t o th e numbe r o f engin e familie s withi nth e engin e famil y group , up t o a maximu m o f thre e vehicles . (ii ) Th e productio ndurability-dat a vehicle s representing th e design s selecte d i nparagraph(h)(l)(i ) o f thi s sectio n wil l b e randoml yselecte d fromth e manufacturer' s production . Th e Administrato r wil l mak e thes e randomselection s unles s th e manufacture r (wit hprio r approva l o f th e Administrator ) elect s t o mak e th e random selections . (iii ) Th e manufacture r mayselec t additiona l productio n durability-dat a vehicl e design s fro mwithi n th e engin e famil ygroup . Th e productio n , , durability-dat a vehicle s representing thes e design s shal l b e randoml y selecte d fro

mth e manufacturer' s productio ni naccordanc e wit hparagraph(h)(l)(ii ) o f thi s section .P.6 5

(iv ) Fo r eac hproductio n durability-dat a vehicl e selecte d unde r paragraph(h)(1 ) o f thi s section , th e manufacture r shal l provid e t o th e Administrato r (befor e th e vehicl e I s teste d o r begin s servic e accumulation ) th e vehicl e identificatio n number . Befor e th e vehicl e begin s servic e accumulatio n th e manufacture r shal l als o provid e th e Administrato r wit ha descriptio no f th e durability-dat a vehicl e a s specifie d b yth e Administrator . (v ) I n lie u o f testing a productio ndurability-dat a vehicl e selecte d unde r paragraph(h)(1 ) o f thi s section , an d submitting dat a therefor , a manufacture r may , wit hth e prio r writte napprova l o f th e Administrator , submi t exhaus t emissio ndat a froma productio nvehicl e o f th e same configuratio n fo r whic hal l applicabl e dat a ha s previousl y bee n submitted . (2 ) If , withi na n existing engin e famil ygroup , a manufacture r request s t o certif yvehicle s o f a ne wdesign , engin e family , emissio n contro l system , o r wit han yothe r durability-relate d design difference , th e Administrato r wil l determin e i f th e existing engine ^ famil ygrou p deterioratio nfacto r i s appropriat e fo r th e ne wdesign . I f th e Administrato r canno t mak e thi s determinatio no r deem s th e deterioratio n facto r no t appropriate , th e Administrato r shal l selec t preproductio n durability-dat a vehicle s unde r th e provision s o f paragraph(c ) o f thi s section . I fP.6 6

vehicle s ar e the ncertifie d using th e ne wdesign , th e Administrato r mayselec t productio n vehicle s wit hth e ne w design unde r the provision s o f paragraph(h)(1 ) o f thi s section . (3 ) I f a manufacture r request s t o certif yvehicle' s o f a ne wdesign tha t th e Administrato r determine s ar e a ne w engin e famil ygroup , th e Administrato r shal l selec t preproductio n durability-dat a vehicle s unde r th e provision s o f paragraph(c ) o f thi s section . I f vehicle s ar e the n certifie d using th e ne wdesign , th e Administrato r may selec t productio nvehicle s o f tha t design unde r th e provision s o f paragraph(h)(1 ) o f thi s section .

### 6 . Ane wSectio n86.107-X Xi s propose dt o b e adde dt o

i" " 

### Subpar t B , t o rea da s follows : •) §86.1(n-XXSamplin g andanalytica l system ; evaporativ e

emissions . (a ) Componen t descriptio no f evaporativ e emission s samplin g system . Th e followin g component s wil l b e use di n evaporativ e emission s samplin g system s fo r testin g unde r thi s subpart . (1 ) Evaporativ e emissio nmeasuremen t enclosure . Th e enclosur e shal l b e readil ysealable , rectangula r i nshape , wit hspac e fo r personne l acces s t o al l side s o f th e vehicle . Th e side s o f th e enclosur e shal l b e equippe dwit h on e o r mor e port s t o provid e acces s t o th e fue l tan k fille r cap(s ) o f tes t vehicle s andt o allo wfuelin g o f th e tes t vehicl e fro ma fue l nozzl e andhos e locate doutsid e o f th e enclosure . Acces s por t sealin g device s shal l b e capabl e o f maintainin g gas-tightnes s o f th e enclosur e a t al l times . A s a nalternativ e t o th e acces s ports , a manufacture r ma y locat e th e fue l dispensin g hos e andnozzl e i nth e enclosure , provide di t i s demonstrate dtha t th e hos e and nozzl e contribut e n o hydrocarbon s t o th e enclosur e byany mean s andals o provide dtha t nozzl e activatio nand/o r reactivatio nca nb e performe dsafel yandtha t th e mean s fo r activatin g th e nozzl e shal l no t introduc e air ,P.6 8

hydrocarbons , o r othe r material s int o th e enclosur e during a test . Whe nsealed , the enclosur e shal l b e ga s tigh t i n accordanc e wit h§86.117 . Interio r surface s mus t b e impermeabl e t o hydrocarbons . On e surfac e shoul d b e o f flexible , impermeabl e materia l t o allowfo r mino r volum e change s resulting fromtemperatur e changes . Wal l desig n shoul d promot e maximu mdissipatio no f hea t an d i f artificia l cooling i s used , interio r surfac e temperature s shal l no t b e les s tha n68.0° F (20.0°C) . (2 ) Evaporativ e emissio n hydrocarbo nanalyzers . A hydrocarbo n analyze r utilizing th e hydroge n flame ionizatio n principl e (FID ) shal l b e use d t o monito r th e atmospher e withi n th e enclosure . Instrumen t bypas s flow mayb e returne d t o th e enclosure . Th e FI D shal l hav e a respons e time t o 9 0 percen t o f fina l reading o f les s tha n 1. 5 seconds , an

d b e capabl e o f meeting th e following performanc e requirement s expresse d a s a functio no f C ., , wher e C . , i s the specifi c enclosur e hydrocarbo nlevel , i n ppm , corresponding t o th e evaporativ e emissio nstandard :P.6 9 (i ) Stabilit yo f th e analyze r shal l b e bette r tha n 0.0 1 C. , pp

ma t zer o an

d spanove r a 15-minut e perio d o n al l range s used . (ii ) Repeatabilit yo f th e analyzer , expresse d a s on e standard deviation , shal l b e bette r tha n 0.00 5 C . , ppm o n al l range s used . (3 ) Evaporativ e emissio n hydrocarbo ndat a recording system . Th e electrica l outpu t o f th e FI D shal l b e recorde d a t leas t a t th e initiatio n an d terminatio n o f eac hdiurna l or ho t soak . Th e recording mayb e b ymean s o f a stri p char t potentiometri c recorder , b yus e o f anon-lin e compute r systemor othe r suitabl e means . I n an ycase , th e recording systemmus t hav e operationa l characteristic s (signa l t o nois e ratio , speed o f response , etc. ) equivalen t t o o r bette r thanthos e o f th e signa l sourc e being recorded , an

d mus t provid e a permanen t record o f results . Th e record shal l showa positiv e indicatio no f th e initiatio n an

d completio no f eac hdiurna l or ho t soak along wit hth e time elapse d betwee ninitiatio nan d completio no f eac hsoak . (4 ) Tank fue l heating system . Th e tank fue l heatin g systemshal l consis t o f a hea t sourc e an d a temperatur e controller . Atypica l hea t sourc e i s a 200 0 Wheating pad . Othe r source s mayb e use d a s require d b yP.7 0

circumstances . Th e temperatur e controlle r mayb e manual , suc ha s a variabl e voltag e transformer , o r mayb e automated . Th e heating systemmus t no t caus e ho t spot s o n th e tank wette d surfac e whic hcoul d caus e loca l overheating o f th e fuel . Hea t mus t no t b e applie d t o th e vapo r i nth e tan k abov e th e liqui d fuel . Th e temperatur e controlle r mus t b e capabl e o f controlling th e fue l tank temperatur e during th e diurna l soak t o withi n+3.0° F (1.7°C ) o f th e following equation :

F = T + 0.4 t o

o r for S I units :

C = T Q + (2/9) t

where : F = Temperatur e i n° F C = Temperatur e i n ° C t = Time sinc e star t o f tes t i n minute s T = Initia l temperatur e i n ° F (or i n° C fo r S I units ) , (5 ) Temperatur e recording system . Stri p char t recorder(s ) o r an automati c dat a processo r shal l b e use d t o record enclosur e ambien t an d vehicl e fue l tank temperatur e during th e evaporativ e emission s test . Th e temperatur eP.7 1

recorde r o r dat a processo r shal l record eac htemperatur e a t leas t onc e everyminute . Th e recording systemshal l b e capabl e o f resolving time t o +15 s an d capabl e o f resolving temperatur e t o +0.75° F (0.42°C) . Th e temperatur e recording syste m(recorde r an

d sensor ) shal l hav e anaccurac yo f +3.0° F (l.7°C) . Th e recorde r (dat a processor ) shal l hav e a time accurac yo f +15 s an d a precisio n o f +15s . Tw o ambien t temperatur e sensors , connecte d t o provid e on e averag e output , shal l b e located i nth e enclosure . Thes e sensor s shal l b e locate d a t the approximat e vertica l centerlin e o f eac hsid e wal l extending four inche s (nominally ) int o th e enclosur e a t a heigh t o f 3.0+0. 5 f t (0.9+0. 2 m) . Th e vehicl e fue l tank temperatur e senso r shal l b e locate d i n th e fue l tan

k s o a s t o measur e th e temperatur e o f th e prescribe d tes t fue l a t th e approximat e mid-volum e o f th e fuel . Manufacturer s shal l arrang e tha t vehicle s furnishe d fo r testing a t Federa l certificatio n facilitie s b e equippe d wit hiron-constanta n Typ e J thermocouple s fo r measuremen t o f fue l tank temperature . (6 ) Purg e blower . On e o r mor e portabl e o r fixe d blower s shal l b e use d t o purg e th e enclosure . Th e blower s shal l hav e sufficien t flowcapacit yt o reduc e th e enclosur e hydrocarbo n concentratio n fro mth e tes t leve l t o th e ambien t leve l betwee n tests . Actua l flowcapacit ywil l depend upo n th e time availabl e betwee ntests .(7 ) Mixing blower . On e o r mor e smal l blower s o r

fan s wit ha tota l capacit yo f 20 0 t o 1,00 0 cf m shal l b e use d t o mi xth e content s o f th e enclosur e during evaporativ e emissio n testing . No portio no f th e ai r strea m shal l b e directe d toward s th e vehicle . Maintenanc e o f uniformconcentration s throughou t th e enclosur e i s importan t t o the accuracyo f th e test . (8 ) Fu e 1 in

g ecruipment . Th e fueling equipmen t shal l consis t o f a fue l deliverysystemwit htemperatur e contro l equipment , fue l flowsafet yswitch , servic e statio n typ e dispensing pump , hose , nozzle , an d a mete r t o measur e th e dispense d fue l volume . Afue l recirculatio nsystemfrom th e temperatur e contro l equipmen t t o th e nozzl e shal l b e utilize d t o avoi d trapping o f non-temperatur e controlle d fue l i n th e hose . Th e fue l deliverysystem mus t b e capabl e o f delivering fue l a t 79. 0 t o 86.0° F (26. 1 t o 30.0°C ) an d a t a flowrat e o f fro m3. 0 t o 10. 0 gal/mi n(11. 4 t o 37. 9 1/min) .P.7 3

7 . Ane wSectio n 86.130-X Xi s propose d t o b e adde d t o Subpar t B , t o read a s follows : §86.130-X

XTes t sequence ; genera l requirements .

Th e tes t sequence s show n i n Figure s BXX-lO a an d BXX-lObshowth e step s encountere d a s th e tes t vehicl e undergoe s th e procedure s subsequentl ydescribe d t o determin e conformit ywit hth e standard s se t forth . Figur e BXX-lO a show s tes t sequence s t o b e use d wit hvehicle s equippe d wit hfull yintegrate d refueling emission s contro l systems . Figur e BXX-lObshow s th e tes t sequenc e t o b e use d wit hal l othe r refueling emissio n contro l systemdesigns . Ambien t temperatur e level s encountere d b yth e tes t vehicl e shal l no t b e les s tha n68.0° F (20.0°C ) no r mor e tha n 86.0° F (30.0°C) . Th e temperature s monitore d during . testin g mus t b e representativ e o f thos e experience d b yth e tes t vehicle . Th e vehicl e shal l b e approximatel yleve l during al l phase s o f th e tes t sequenc e t o preven t abnorma l fue l distribution .P.7 4



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8 . Ane wSectio n 86.131-X Xi s propose d t o b e adde d t o Subpar t B , t o read a s follows : §86.131-X

XVehicl e preparation . (a ) Fo r gasoline-fuele d vehicles , prepar e the ' fue l tank(s ) fo r recording th e temperatur e o f th e prescribe d tes t fue l a t th e approximat e mid-volume o f th e fue l whe n th e tank i s 4 0 percen t full . (b ) Provid e additiona l fitting s an d adapters , a s required , t o accommodat e a fue l drai na t th e lowes t poin t possibl e i n th e tank(s ) a s installe d onth e vehicle . (c ) Fo r non-integrate d an d partiall yintegrate d refueling contro l systems , provid e valving o r othe r mean s t o allowloading o f evaporativ e emission s canister(s ) no t connecte d t o th e vehicl e fue l tank .P.7 7

9 . Ane wSectio n 86.132-X Xi s propose d t o b e adde d t o Subpar t B , t o read a s follows : §86.132-X

XVehicl e preconditioning . (a ) During an

yperio d tha t th e vehicl e i s parke d out-of-door s awaiting testing , th e fue l tank cap(s ) shal l b e remove d t o preven t unusua l loading o f th e canister(s ) (Diesel-fuele d vehicle s ar e exempt) . During thi s tim e car e mus t b e take n t o preven t entryo f wate r o r othe r contaminate s int o th e fue l tank . During an yperio d tha t th e vehicl e i s parke d i n th e tes t are a awaiting testing , th e fue l tank cap(s ) mayb e i nplace . Th e vehicl e shal l b e move d int o th e tes t are a an d th e following operation s performed : (1 ) Fo r gasolin e fuele d vehicle s only , th e refueling emissio n canisters(s) , an d th e evaporativ e emission s canister(s ) i f th e vehicl e i s s o equipped , shal l b e loade d t o breakthrougha s specifie d below . Canister(s ) shal l no t b e purge d prio r t o beginning thi s sequence . I f th e vehicl e i s t o underg o testing fo r fue l economy ( , only , thi s step i s no t required . (i ) Drai nth e vehicl e fue l tank(s) .(ii ) Vehicl e Temperatur e Stabilization . Th e vehicl e

shal l b e soake d a t a temperatur e betwee n68. 0 an d 86.0° F (20. 0 an

d 30.0°C ) fo r a minimu mo f si xhours . Thi s tempeiatur e stabilizatio nstep mayb e omitte d o nvehicle s whic har e alread

ytemperatur e stabilize d a s a resul t o f storag e i n th e tes t area . (iii ) Canister(s ) loading t o breakthrough .

NOTE : I f a t an

ytim e th e hydrocarbo n concentratio n exceed s 15,00 0 ppmC th e enclosur e shoul d b e immediatel y purged . Thi s concentratio nprovide s a 4: 1 safet yfacto r agains t th e lean flammabilit ylimit . (A ) Evaporativ e emission s canister(s) . Fo r vehicle s equippe d wit heithe r non-integrate d o r partiall yintegrate d refueling emissio n contro l systems , th e evaporativ e canister(s ) shal l b e loade d t o breakthrough . (.1 ) Fo r . vehicle s wit hevaporativ e emission s canister s whic har e no t connecte d t o th e fue l tank , th e manufacturer s shal l recommen d a procedur e fo r loading thes e canister s an

d shal l receiv e approva l b yth e Administrato r prio r t o th e us e o f th e recommende d procedure .(2 ) Fo r vehicle s equippe d wit hevaporativ e emissio n

canister s connecte d t o th e fue l tank , th e following procedur e shal l b e performe d t o load th e canister s t o breakthroughusing hydrocarbo n vapor s generate d b ydiurna l hea t builds : (i. ) Th e evaporativ e emissio n enclosur e shal l b e purge d fo r severa l minutes . (ii ) I f no t alread yon , th e evaporativ e enclosur e mixing fan shal l b e turne d o n a t thi s time . (iii ) Immediatel yprio r t o th e diurna l hea t build , th e refueling 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 flow o f vapo r fromth e fue l tank t o th e refueling caniste r during th e fueling event . I f disconnected , th e ope nen d o f th e vapo r lin e leading t o th e refueling caniste r shal l b e plugged . Th e fue l tank(s ) o f th e prepare d vehicl e shal l b e draine d an

d recharge d wit htes t fuel , a s specifie d i n §86.113 , t o th e "tan k fue l volume " define d i n§86.082-2 . Th e temperatur e o f th e fue l prio r t o jLt s deliveryt o th e fue l tank(s ) shal l b e betwee n45. 0 an d 60.0° F (7. 2 an d 16.0°C) . Th e fue l tank cap(s ) i s no t installe d unti l th e diurna l hea t buil d begins .P.8 0

(iv ) Following fueling , bot hope nend s o f th e vapo r line shal l b e plugged , o r i f a diverte r valv e i s employed , it s exi t plugged . I n bot hcases , th e evaporativ e caniste r remain s connecte d t o th e fue l tank . (y ) Th e tes t vehicle , wit hth e engin e shu t off , shal l b e move d int o th e evaporativ e emissio nenclosure , th e vehicl e shal l b e grounded , th e fue l tan k temperatur e senso r shal l b e connecte d t o th e temperatur e recording system , and , i f reguired , th e hea t sourc e shal l b e properl y positione d wit hrespec t t o th e fue l tank(s ) and/o r connecte d t o th e temperatur e controller . (vi ) Th e temperatur e recording systemshal l b e started . (vii ) Th e fue l mayb e artificiall yheate d t o th e starting diurna l temperature . (viii ) Whe n th e fue l temperatur e recording system reache s a t leas t 58.0° F (14.0°C) , immediately : instal l fue l tank s cap(s) ; tur nof f purg e blower , i f no t alread yoff ; clos e an

d sea l enclosur e door s an d initiat e measuremen t o f th e hydrocarbo nleve l i n th e SHED .P.8 1

(ix ) Whe n th e fue l temperatur e recording system reache s 60.0+2.0° F (16.0+1.1°C) , immediatel ystar t th e diurna l hea t build . (x ) Th e fue l shal l b e heate d i nsuc ha wa ytha t it s temperatur e chang e conform s t o th e following functio nt o withi n +3.0° F (-2.2°C) :

F = T + 0.4 t o fo r S I units , C = T Q + (2/9) t where : F = fue l temperature , °F . C = fue l temperature , °C . t = time sinc e beginning o f test , minutes . T = initia l temperatur e i n ° F (° C fo r S I units ) (xi ) A s soo n a s breakthroughoccur s (breakthroughi s define d a s th e poin t a t whic hth e hydrocarbo nconcentratio n i n th e SHE D increase s b ya facto r o f thre e o r greate r i n on e minut e o r less ) o r th e fue l temperatur e reache s 84.0° F (28.9°C) , whicheve r occur s first , th e hea t sourc e shal l b e turne d off , th e enclosur e door s shal l b e unseale d an d opened , an

d th e vehicl e fue l tank cap(s ) shal l b e removed .I f breakthroughha s no t occurre d b yth e time th e fue l temperatur e reache s 84.0°F , th e vehicl e shal l b e remove d (withengin e shu t off ) fro mth e evaporativ e emissio n enclosur e an

d th e entir e procedur e outline d i n (a)(1)(iii)(A)(2 ) o f thi s sectio n shal l b e repeate d a s many time s a s necessaryunti l breakthroughoccurs . ' Upo n completio n o f loading o f th e evaporativ e caniste r t o breakthrough , drai nth e heate d fue l fro m th e fue l tank an d connec t th e refueling canister . (B ) Refueling emission s canister(s) . (1) Plac e th e vehicl e i nth e SHE D i f no t alread yi nth e SHED . Ground th e vehicle . Remov e th e fue l tan k cap(s) . (2 ) Purg e th e SHE D o f hydrocarbo nvapor , tur n o nth e mixing blower , clos e an d sea l th e SHE D doors . (3 ) Star t measuremen t o f th e hydrocarbo nleve l i n th e SHED . (4 ) Th e tank(s ) shal l b e fille d t o th e nomina l tank capacit yo r unti l caniste r breakthroughoccur s (caniste r breakthroughi s define d a s th e poin t a t whic hth e hydrocarbo nconcentratio n i nth e SHE D increase s b ya facto r o f thre e o r greate r i non e minut e o r less) , whicheve r occur s first , wit htes t fuel , a s specifie d i n §86.113 .Th e temperatur e o f th e dispense d fue l shal l b e betwee n 79. 0

an d 86.0° F (26. 1 an d 30.0°C) . Th e fue l dispensin g rat e shal l b e betwee n 3. 0 an d 5. 0 gal/mi n (11. 3 an d 18. 9 1/min) . I f the vehicl e i s equippe d wit hdua l fue l tank s eithe r fue l tank mayb e fille d first . I f caniste r breakthroughdoe s no t occur during th e firs t ful l fueling operation , th e SHE D shal l b e opened , th e vehicl e remove d withou t starting th e engine , an d draining o f th e fue l tank(s ) shal l b e initiate d withi n1 0 minute s o f completing th e firs t fueling operation . Th e tank(s ) shal l b e drained , th e SHE D purge d o f hydrocarbo nvapors , th e vehicl e move d int o the SHE D withou t starting th e engine , an d th e door s close d an

d sealed . Withi n1 0 minute s o f completio no f fue l tank draining , a secon d fueling operatio nshal l b e initiated . Asecon d ful l fueling o r fueling t o breakthrough , whicheve r occur s first , a s describe d abov e shal l b e performed . I f breakthroughha s no t occurred , fue l draining , SHE D purging an d resealing , an

d fueling a s describe d above , shal l b e repeate d unti l breakthrough occurs . (5 ) I f th e vehicl e i s equippe d wit hdua l fue l tank s an d a commo n canister , eithe r fue l tank mayb e fille d first . I f th e vehicl e i s equippe d wit hdua l fue l tank s an d canister s dedicate d t o eac htank , on e caniste r shal l b e loade d t o breakthrough , th e SHE D opene d an d purge d o f hydrocarbo n vapor s an d resealed , an

d th e second caniste r loade d t o breakthrough .P.8 4 (6 ) Remov e th e vehicl e fromth e SHE D withou t starting th e engine . (?2 ) Vehicl e fueling . Withi none : hour o f loading th e canister(s ) t o breakthrough , th e refueling emissio n canister(s ) shal l b e disconnecte d (gasoline-fuele d vehicle s only) . Th e fue l tank(s ) shal l b e draine d throughth e provide d fue l tank drain(s ) an d fille d wit htes t fuel , a s specifie d i n §86.113 , t o th e "tan k fue l volume " define d i n §86.082-2 . Th e refueling emissio n canister(s ) shal l b e reconnecte d (gasoline-fuele d vehicle s only) . (3 ) Dynamomete r d r ive . Withi n on e hour o f being fuele d th e vehicl e shal l b e placed , eithe r b ybeing drive n o r pushed , o n a dynamomete r an d operate d throughon e Urba n Dynamomete r Driving Schedul e tes t procedure , specifie d i n §86.11 5 an

d Appendi xI . Ates t vehicl e mayno t b e use d t o se t dynamomete r horsepower . (b ) Withi n five minute s o f completio no f th e preconditioning drive , th e vehicl e shal l b e drive nof f th e dynamomete r an

d parked . Th e vehicl e shal l b e store d fo r no t les s tha n 1 2 hour s no r fo r mor e than 3 6 hour s prio r t o th e col d star t exhaus t test. . (Gasoline-fuele d vehicle s underg o a one-hou r diurna l hea t buil d prio r t o th e col d star t exhaus t test . Awai t o f u p t o on e hou r i s permitte d betwee n th e en

d o f th e diurna l hea t buil d an d th e beginnin gP.8 5

o f th e col d star t exhaus t test , describe d i n§86.13 0 an d Figure s BXX-lO a an

d BXX-lOb) . (c ) Vehicle s t o b e teste d fo r evaporativ e emission s shal l b e processe d i n accordanc e wit hprocedure s i n §§86.13 3 through86.138 . Vehicle s t o b e teste d fo r exhaus t emission s onl yshal l b e processe d according t o §§86.13 3 through86.137 .P.8 6

10 . Ane wSectio n 86.133-X Xi s propose d t o b e adde d t o Subpar t B , t o read a s follows :

S86.133-X

XDiurna l breathing los s test . (a ) Vehicle s equippe d wit hfully-integrate d refueling emission s contro l systems . (1 ) Following vehicl e preparatio n an d vehicl e preconditioning procedure s describe d i n §§86.13 1 an d 86.13 2 th e tes t vehicl e shal l b e allowe d t o soak fo r a perio d o f no t les s than 1 2 or mor e tha n 3 6 hour s prio r t o th e exhaus t emissio n test . Th e diurna l tes t shal l star t no t les s than1 0 o r mor e than 3 5 hour s afte r th e en d o f th e preconditioning procedure . Th e star t o f th e exhaus t emission s test , define d i n§86.137 , shal l followth e en d o f th e diurna l tes t withi non e hour . (2 ) Gasoline-fuele d vehicle s t o b e teste d fo r exhaus t emission s onl yshal l underg o th e diurna l hea t build . Sinc e n o evaporativ e measurement s ar e necessary , a nevaporativ e enclosur e i s no t required . (3 ) Th e evaporativ e emissio nenclosur e shal l b e purge d fo r severa l minute s immediatel yprio r t o th e test .

NOTE : I f a t anytime th e hydrocarbo n concentratio nexceed s 15,00 0 pp

mC th e enclosur e shoul d b e immediatel ypurged . Thi sP.8 7

concentratio n provide s a 4: 1 safet yfacto r agains t th e lean flammabilit ylimit . (4 ) ' : Th e FI D hydrocarbo nanalyze r shal l b e zeroe d an d spanne d immediatel yprio r t o th e test . (5 ) I f no t alread yon , th e evaporativ e enclosur e mixin g fan shal l b e turne d o n a t thi s time . (6 ) Immediatel yprio r t o th e diurna l breathing los s test , th e refueling emission s canister(s ) shal l b e disconnecte d or a diverte r valv e opened , i f s o equipped , t o preven t th e flow o f vapo r fromth e fue l tan k t o th e refueling caniste r during th e fueling event . I f disconnected , th e ope nen d o f th e vapo r line leading t o th e refueling caniste r shal l b e plugged . Th e fue l tank(s ) o f th e prepare d vehicl e shal l b e draine d an d recharge d wit htes t fuel , a s specifie d i n§86.113 , t o th e "tan k fue l volume " define d i n §86.082-2 . Th e temperatur e o f th e fue l prio r t o it s deliveryt o the fue l tank(s ) shal l b e betwee n45. 0 an d 60.0° F (7. 2 an d 16.0°C) . Th e fue l tank cap(s ) i s no t installe d an

d th e refueling emission s contro l canister(s ) i s no t reconnecte d unti l th e diurna l hea t build , begins . (7 ) Th e tes t vehicle , wit hth e engin e shu t off , shal l b e move d int o th e evaporativ e emissio nenclosure , th e tes t vehicl e window s an

d luggag e compartment s shal l b e opened , th e fue l tankP.8 8

temperatur e senso r shal l b e connecte d t o th e temperatur e recording system , and , i f required , th e hea t sourc e shal l b e properl ypositione d wit hrespec t t o th e fue l tank(s ) and/o r connecte d t o th e temperatur e controller . (8 ) Th e temperatur e recording systemshal l b e started . (9 ) Th e fue l mayb e artificiall yheate d t o th e starting diurna l temperature . (10 ) Whe n th e fue l temperatur e recording system reache s a t leas t 58.0° F (14.0°C) , immediately . (i ) Instal l fue l tan k cap(s ) an

d reconnec t refueling emission s contro l canister(s) . (ii ) Tur nof f purg e blowers , i f no t alread yof f a t thi s time . (iii ) Clos e an

d sea l enclosur e doors . (11 ) Whe nth e fue l temperatur e recording systemreache s 60.0+2.0° F (16.0+1.1°C) , immediately : (i ) Analyz e enclosur e atmospher e fo r hydrocarbon s an d record . Thi s i s the initia l (tim e = 0 minutes ) hydrocarbo n concentration , C„ c . , require d i n§86.143 .P.8 9

(ii ) Record barometri c pressur e reading . Thi s i s th e initia l (tim

e = 0 minutes ) barometri c pressure , P , . , require d i n §86.143 . (iii ) Record enclosur e ambien t temperature . Thi s i s th e initia l (tim

e = 0 minutes ) enclosur e ambien t temperature" , T, , require d i n §86.143 . (iv ) Star t diurna l hea t buil d an d record time . Thi s commence s the 60+ 2 minut e tes t period . (12 ) The fue l shal l b e heate d i n suc ha waytha t it s temperatur e chang e conform s t o th e following functio n t o withi n +3.0° F (+1.6°C) :

F = T o +0.4 t

fo r S I units ,

C = T 0 + (2/9) t

where :

F = fue l temperature , ° F C = fue l temperature , ° C t = time sinc e beginning o f test , minutes . T 0 = initia l temperatur e i n° F (or i n° C fo r S I units )P.9 0

Afte r 60+ 2 minute s o f heating , th e fue l temperatur e ris e shal l b e 24.0+1.0° F (13.3+0.5°C) . (13 ) Th e FI D hydrocarbo nanalyze r shal l b e zeroe d an d spanne d immediatel yprio r t o th e en d o f th e diurna l test . (14 ) Th e en

d o f th e diurna l breathing los s tes t occur s 60+ 2 minute s afte r th e hea t buil d begins , paragrap h (ll)(iv) . Analyz e th e enclosur e atmospher e fo r hydrocarbon s an

d record . Thi s i s the fina l (time = 6 0 minutes ) hydrocarbo n concentration , c unf require d i n §86.143 . Th e time (or elapse d time ) o f thi s analysi s shal l b e recorded . (i ) Record barometri c pressur e reading . Thi s i s th e fina l (tim

e = 6 0 minutes ) barometri c pressure , P hf ' require d i n§86.143 . (ii ) Record enclosur e ambien t temperature . Thi s i s th e fina l (tim

e = 6 0 minutes ) enclosur e ambien t temperature , T f , require d i n §86.143 . (15 ) Th e hea t sourc e shal l b e turne d of f an d th e enclosur e door s unseale d an d opened . (16 ) Th e hea t sourc e shal l b e move d awa yfromth e vehicle , i f required , and/o r disconnecte d fromth eP.9 1

temperature , controller , th e fue l tank temperatur e senso r shal l b e disconnecte d fro mth e temperatur e recording system , th e tes t vehicl e window s an d th e luggag e compartment s mayb e close d an d th e tes t vehicle , wit hth e engin e shu t off , shal l b e remove d fro mth e evaporativ e emissio n enclosure . (17 ) Fo r vehicle s wit hmultipl e tanks , th e larges t tank shal l b e designate d a s th e primarytank an d shal l b e heate d i naccordanc e wit hthe procedur e describe d i n paragraph(12 ) o f thi s section . Al l othe r tank s shal l b e designate d a s auxiliarytank s an d shal l underg o a simila r hea t buil d suc htha t the fue l temperatur e shal l b e withi n 3.0° F (1.6°C ) o f th e primarytank . (b ) Vehicle s equippe d wit hnon-integrate d o r partially-integrate d refueling emission s contro l (1 ) Overvie w (i ) Vehicle s equippe d wit heithe r non-integrate d o r partially-integrate d refueling emission s contro l system s shal l b e require d t o underg o tw o diurna l hea t build s an d a diurna l breathing los s tes t fo r th e purpos e o f demonstrating complianc e wit hevaporativ e emission s standards . Th e firs t o f thes e hea t build s occur s afte rP.9 2

vehicl e preparatio nan d preconditioning , an d befor e th e star t o f th e exhaus t emissio n test . Th e second diurna l hea t buil d occur s after ' completio no f th e ho t soak emission s test . Evaporativ e emission s ar e no t measure d during eithe r o f thes e firs t two diurna l hea t builds , s o tha t an evaporativ e emission s enclosur e i s no t reguired . Th e diurna l breathing los s tes t occur s directl yfollowing th e secon

d hea t build . Evaporativ e emission s shal l b e measure d during thi s fina l test , s o tha t i t shal l b e performe d i nanevaporativ e emission s enclosure . (ii ) Th e procedur e t o b e use d t o performth e firs t an d secon d diurna l hea t build s i s essentiall yidentica l wit h th e diurna l breathing los s tes t require d fo r vehicle s equippe d wit hfully-integrate d refueling emission s contro l systems , excep t tha t evaporativ e emission s ar e no t measured . Thi s procedur e i s presente d i nparagraph(3 ) below . Asimila r procedur e shal l b e carrie d ou t t o perform th e diurna l breathing los s test , a s presente d i nparagraph (4 ) below . (iii ) Th e keydifferenc e betwee nth e diurna l breathing los s tes t require d fo r vehicle s equippe d wit h fully-integrate d refueling emission s contro l systems , an d th e secon

d diurna l hea t buil d an d th e diurna l breathing los s tes t require d fo r vehicle s wit hpartially

- o rP.9 3

non-integrate d contro l systems , i s tha t th e latte r tw o test s ar e carrie d ou t wit ha n initia l fue l temperatur e o f 72.0° F instead o f 60.0°F , an d a fina l fue l temperatur e o f 96.0° F instead o f 84.0°F . (2 ) Tes t Sequenc e (i ) Following vehicl e preparatio nan d vehicl e preconditioning procedure s describe d i n§§86.13 1 an d 86.132 , the tes t vehicl e shal l b e allowe d t o soak fo r a perio d o f no t les s tha n 1 2 no r mor e tha n 3 6 hour s prio r t o th e exhaus t emissio n test . Th e firs t diurna l hea t buil d shal l star t no t les s tha n 1 0 o r mor e tha n 3 5 hour s afte r th e en d o f th e preconditioning procedur e an d b e conducte d according t o paragraph(b)(2 ) o f thi s section . Sinc e n o evaporativ e measurement s ar e necessary , anevaporativ e enclosur e i s no t reguired . Th e star t o f th e exhaus t emission s test , describe d i n§86.13 7 shal l follo wth e en d o f th e firs t diurna l hea t buil d withi non e hour .P.9 4

(ii ) Gasoline-fuele d vehicle s t o b e teste d fo r exhaus t emission s onl yshal l underg o th e firs t diurna l hea t build . Sinc e n o evaporativ e measurement s ar e necessary , an evaporativ e enclosur e i s no t required . (iii ) Withi n 1 5 minute s o f completing th e ho t soak emission s test , describe d i n §86.138 , th e secon d diurna l hea t buil d shal l b e initiated . Th e secon d diurna l hea t buil d shal l b e conducte d according t o paragraph(b)(3 ) o f thi s section . Sinc e n o evaporativ e measurement s ar e necessary , an evaporativ e enclosur e i s no t required . Withi n1 0 minute s o f completing th e secon d diurna l hea t build , draining o f th e heate d fue l fro mth e fue l tanks(s ) shal l b e initiated . Th e vehicl e shal l b e temperatur e stabilize d a t a temperatur e o f 68. 0 t o 86.0° F (20. 0 t o 30.0°C ) fo r no t les s tha n 6 hour s no r mor e tha n2 4 hour s betwee n fue l draining an d fueling t o th e "tan k fue l volume " whic hpreceed s th e diurna l breathing los s tes t i nth e evaporativ e enclosure .P.9 5

(iv ) Following completio n o f th e secon d diurna l hea t build , th e diurna l breathing los s tes t i s t o b e conducte d according t o paragraph(b)(4 ) o f thi s section . Evaporativ e emissions^measurement s ar e required , s o tha t thi s procedur e mus t b e carrie d ou t i n anevaporativ e emission s enclosure . (3 ) Procedure s fo r Firs t an d Second Diurna l Hea t Builds : (i ) Disconnec t refueling canister(s ) (Se e paragrap h (a)(6)) . (ii ) Drai nth e fue l tank(s ) an d recharg e wit htes t fuel , a s specifie d i n §86.113 , t o th e "tan k fue l volume " define d i n §86.082-2 . Th e temperatur e o f th e fue l prio r t o it s deliveryt o th e fue l tank(s ) shal l b e betwee n45. 0 an d 60.0° F (7. 2 an

d 16°C ) fo r th e firs t fueling associate d wit h th e firs t hea t buil d an d betwee n 60. 0 an

d 72.0° F (15. 6 an

d 22.2°C ) fo r the secon d fueling associate d wit hth e second hea t build . Th e fue l tank temperatur e senso r shal l b e connecte d t o th e temperatur e recording systeman d th e temperatur e recording systemturne d on , th e hea t sourc e shal l b e properl ypositione d wit hrespec t t o th e fue l tank(s ) and/o r connecte d t o th e temperatur e controller . Heating o f th e fue l shal l the nb e started .P.9 6

(iii ) Whe n th e fue l temperatur e recording systemshow s tha t th e fue l ha s reache d 58.0° F (14.0°C ) fo r th e firs t hea t buil d o r 70.0° F (21.0°C ) fo r th e second hea t buil d immediatel yinstal l th e fue l tank cap(s ) an d reconnec t refueling emission s contro l canister(s) . Heating o f th e fue l shal l continu e an d b e controlle d s o tha t it s rat e o f temperatur e ris e conform s wit hth e equatio nspecifie d i n paragraph(a)(12 ) o f thi s section . (iv ) A s soo n a s th e temperatur e recording system show s tha t th e temperatur e o f th e fue l ha s reache d 84.0+2.0° F (28.9+1.9°C ) fo r th e firs t hea t buil d o r 96.0+2.0° F (35.6+1.0°C ) fo r th e second hea t build , heatin g o f th e fue l shal l b e stoppe d an d th e tes t vehicl e shal l procee d t o th e nex t step i nth e tes t sequenc e (i.e. , afte r th e firs t diurna l hea t build , t o th e col d star t exhaus t tes t an

d afte r th e secon d diurna l hea t build , t o fue l draining i n preparatio n fo r th e diurna l breathin g los s test) . (4 ) Procedure s fo r Diurna l Breathing Los s Test : Th e diurna l breathing los s tes t shal l b e carrie d ou t according t o the provision s o f paragraph s (a)(3 ) through (a)(17 ) o f thi s section , excep t fo r th e following differences :P.9 7

(i ) Th e draining an d fueling containe d i n paragrap h (a)(6 ) shal l b e initiate d withi n 1 0 minute s o f completio n o f th e secon

d diurna l hea t build . (ii ) During refueling , define d i nparagrap h(a)(6) , th e temperatur e o f th e fue l prio r t o it s deliveryt o th e fue l tank(s ) shal l b e betwee n 60. 0 an d 72.0° F (15. 6 an d 22.2°C) . (iii ) Th e step s define d i n paragraph(a)(10 ) shal l b e carrie d ou t whe n th e temperatur e recording systemindicate s a fue l temperatur e o f a t leas t 70.0° F (14.0°C) . (iv ) Th e step s define d i n paragraph(a)(11 ) shal l b e carrie d ou t whe n th e temperatur e recording systemindicate s a fue l temperatur e o f 72.0+2.0° F (16.0+1.1°C) .P.9 8

11 . Ane wSectio n 86.138-X Xi s propose d t o b e adde d t o Subpar t B , t o read a s follows : §86.138-X & Hot-soa k test . Th e hot-soa k evaporativ e emissio ntes t shal l b e conducte d immediatel yfollowing th e ho t transien t exhaus t emissio n test . (a ) Prio r t o th e completio n o f th e hot-star t transien t exhaus t emissio n sampling period , th e evaporativ e emission s enclosur e shal l b e purge d fo r severa l minutes . (b ) Th e FI D hydrocarbo n analyze r shal l b e zeroe d an d spanne d immediatel yprio r t o th e test . (c ) I f no t alread yon , th e evaporativ e enclosur e mixing fan shal l b e turne d o n a t thi s time . (d ) Upo ncompletio n o f th e ho t transien t exhaus t emissio n sampling period , th e vehicl e engin e compartmen t cove r shal l b e closed , th e cooling fan shal l b e moved , th e vehicl e shal l b e disconnecte d fro mth e dynamomete r an d exhaus t sampling system , an

d the n drive n a t minimu mthrottl e t o th e vehicl e entranc e o f th e enclosure .P.9 9 (e ) Th e vehicle' s engin e mus t b e stoppe d befor e an y par t o f th e vehicl e enter s th e enclosure . Th e vehicl e ma y b e pushe d or coaste d int o the enclosure . (f ) Th e tes t vehicl e window s an d luggag e compartment s shal l b e opened , i f no t alread yopen . (g ) Th e temperatur e recording systemshal l b e starte d an

d th e time o f engin e shu t of f shal l b e note d o n th e evaporativ e emissio nhydrocarbo ndat a recording system . (h ) Th e enclosur e door s shal l b e close d an d seale d withi ntw o minute s o f engin e shutdow nan d withi nseve n minute s afte r th e en d o f th e exhaus t emissio n test . (i ) Th e 60+0. 5 minut e ho t soak begin s whe n th e enclosur e door s ar e sealed . Th e enclosur e atmospher e shal l b e analyze d an

d recorde d a t thi s time . Thi s i s th e initia l (tim e = 0 minutes ) hydrocarbo n concentration , c uci ' require d i n §86.143 . (j ) Utilizing th e acces s port(s ) i ni;h e sid e o f th e enclosure , th e fue l tank caps(s ) shal l b e remove d fo r a perio d o f no t les s tha n5 second s no r longe r tha n2 0 second s t o reliev e an ypressur e i n th e tank an d the nb e reinstalle d an

d tightened . Thi s operatio nshal l b e complete d withi n five minute s o f engin e shutdown .P. 1 (k ) Th e tes t vehicl e shal l b e permitte d t o soak fo r a perio d o f on e hour (60.0+0. 5 minutes ) i n th e enclosure . (1 ) Th e FI D hydrocarbo nanalyze r shal l b e zeroe d an d spanned immediatel yprio r t o th e en d o f th e test . (m ) Th e en

d o f th e hot-soa k evaporativ e tes t occur s 60.0+0. 5 minute s afte r th e enclosur e door s ar e sealed , a s specifie d i n paragraph(i) . Analyz e th e enclosur e atmospher e fo r hydrocarbon s an d record . Thi s i s th e fina l (tim e = 6 0 minutes ) hydrocarbo n concentration , c vrf require d i n §86.143 . Th e elapse d time o f thi s tes t shal l b e recorded .P. 2

§86.21 4 [Reserved ]P. 3

§86.21 5 EPAurba n dynamomete r driving schedules . (a ) Th e dynamomete r driving schedule s ar e liste d i n Appendi xI . Th e driving schedule s ar e define d a s a smoot h trac e draw

n throughth e specifie d speed vs . time relationships . Th e driving schedule s consis t o f nonrepetitiv e serie s o f idle , acceleration , cruis e an d deceleratio n mode s o f variou s time sequence s an d rates . (b ) Th e spee d toleranc e a t an ygive ntime fo r thi s schedule , or a fo r a driver' s ai d char t approve d b yth e Administrator , whe n conducte d t o mee t th e requirement s o f Subpar t C , are : (1 ) Th e uppe r limi t i s 4. 0 mp h(6. 4 km/h ) highe r tha n th e highes t poin t o n th e trac e withi n 1 second o f th e give n time . (2 ) Th e lowe r limi t i s 4. 0 mph(6. 4 km/h ) lowe r tha n th e lowes t poin t o n th e trac e withi n1 secon d o f th e give n time . (3 ) Spee d variation s greate r tha nth e tolerance s (sucha s mayoccur during gea r changes ) ar e acceptabl e provide d theyoccur fo r les s tha n2 second s onan yoccasion .P. 4

§86.22 7 Tes t procedure ; overview . (a ) Th e refueling emission s tes t procedur e describe d i n thi s an

d subsequen t section s i s use d t o determin e th e conformit yo f vehicle s wit hth e refueling emission s standard s se t fort hi n Subpar t Afo r light-dut ygasolin e vehicles , light-dut ygasolin e truck s an d heavy-dut y gasolin e vehicles . (b ) Th e refueling emission s tes t i s designe d t o measur e hydrocarbo n emission s resulting fro mth e generatio n or displacemen t o f fue l tank vapo r during vehicl e refueling . Th e refueling emission s shal l b e measure d b y th e enclosur e technique . (c ) Al l emissio ncontro l system s installe d o no r incorporate d i n a ne wmoto r vehicl e shal l b e functioning during al l procedure s i n thi s subpar t except : 1 ) i ncase s o f componen t malfunctio nor failure , an d 2 ) during certai n specifie d fue l drai n an d fil l operation s a t whic htime s th e refueling emissio n contro l caniste r i s disconnected . Maintenanc e t o correc t componen t malfunctio n o r failur e shal l b e authorize d i n accordanc e wit hS86.XXX-25 .P. 5

(4 ) Speed s lowe r thanthos e prescribe d ar e acceptabl e provide d th e vehicl e i s operate d a t maximu m availabl e powe r during suc hoccurrences . §86.21 6 [Reserved ] §86.21 7 [Reserved ] §86.21 8 [Reserved ] §86.21 9 [Reserved ] §86.22 0 [Reserved ] §86.22 1 [Reserved ] §86.22 2 [Reserved ] §86.22 3 [Reserved ] §86.22 4 [Reserved ] §86.22 5 [Reserved ] §86.22 6 [Reserved ]P. 6

§86.22 8 [Reserved ] §86.22 9 [Reserved ]P. 7

§86.23 0 Tes t sequence ; genera l requirements . (a ) Th e refueling emission s procedur e start s wit h loading o £ the refueling emission s canister(s ) a t leas t t o breakthroughan

d continue s wit hth e caniste r stabilizatio n drivedow

n followe d b

yth e refueling emission s measurement . Fo r fully-integrate d system s caniste r loading an d stabilizatio n ar e normall yaccomplishe d a s par t o f th e exhaus t an

d evaporativ e emission s tes t sequence s §86.13 0 o r §86.1230 . Th e tes t sequenc e i s show ni n Figur e CXX-1 . Fo r non-integrate d an

d partially-integrate d system s th e tes t sequenc e i s show

n i n Figur e CXX-2 . (b ) Th e vehicl e shal l b e approximatel yleve l during al l phase s o f th e tes t sequenc e t o preven t abnorma l fue l distribution .P. 8

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§86.23 1 Vehicl e preparation . (a ) Provid e additiona l fitting s an d adapters , a s required , -t

o accommodat e a fue l drai n a t th e lowes t poin t possibl e i n th e tank(s ) a s installe d o nth e vehicle . In-us e vehicle s shal l b e modified , i f a t all , i n a manne r whic hcause s n o permanen t alteratio no f th e vehicle . (b ) Provid e valving o r othe r mean s t o allowth e venting o f th e refueling vapo r lin e t o th e atmospher e rathe r than t o th e refueling emission s canister(s ) whe n require d b

ythi s tes t procedure .P.1 1 §86.23 2 Vehicl e an d caniste r preconditioning . (a ) Fully-integrate d system s (Figur e CXX-1) . (1 ) Th e evaporative/exhaus t test s o f Subpart s B o r M , a s appropriate , normall yprecee d th e refueling emission s measurement , describe d i n§86.233 , an d constitut e th e firs t part s o f vehicl e an d caniste r preconditioning fo r th e refueling emission s measurement . I nth e even t tha t th e vehicl e i s bein g teste d for refueling emission s only , th e following section s o f Subpart s B o r M , a s appropriate , shal l b e performed , excep t tha t emission s ar e no t measured : Vehicl e preconditioning (§86.13 2 o r §86.1232) , Diurna l breathing los s tes t (§86.13 3 o r §86.1233) , Dynamomete r tes t run , gaseou s an d particulat e emission s (§86.137 ) o r Dynamomete r run s (§86.1237 ) an d Hot-soa k tes t (§86.13 8 o r §86.1238 ) . (2 ) Withi n 1 5 minute s o f completing th e on e hour ho t soak (§86.13 8 o r §86.1238 ) th e vehicl e shal l b e pushe d ont o th e dynamomete r an d operate d ove r on e Urba nDynamomete r Driving Schedule . Immediatel yupo ncompletio n o f th e drive , vehicl e ti e down s or othe r restraining device s shal l b e disconnected , th e CV S t o tailpip e connections(s ) shal l b e remove d an

d the vehicl e shal l b e driven , using minimu m throttle , of f o f th e dynamomete r an d t o th e fue l drai n equipment .P.1 2 (3 ) Vehicl e coo l down . Withi n1 0 minute s o f completing th e drive , th e refueling emission s canister(s ) shal l b e disconnecte d o r a diverte r valv e opened , i f s o equipped , vt

o preven t th e flowo f vapo r fro mth e fue l tank t o th e refueling canister . I f disconnected , th e ope n en d o f th e vapo r lin e leading t o th e refueling caniste r shal l b e plugged . Th e fue l tan k cap(s ) shal l the nb e removed , the vehicl e grounded , an d draining o f th e fue l tank(s ) initiated . Withi n6 0 minute s o f completing th e driv e draining o f th e fue l tank(s ) shal l b e completed , an d th e tank(s ) fuele d wit htes t fuel , specifie d i n §86.113 , 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 tan k capacit yt o th e neares t 0. 1 U.S . gallo n(0.3 8 liter) . Th e fue l tank cap(s ) shal l the n b e replaced , th e disconnecte d vapo r lin e leading t o th e refueling caniste r plugge d o r th e diverte r valv e closed , an d th e vehicl e moved , withou t starting th e engine , t o th e are a o f the tes t laboratorywher e i t wil l underg o temperatur e stabilizatio na t a temperatur e o f 80.0+3.0° F (27.0+1.7°C) . Th e duratio no f temperatur e stabilizatio n shal l b e betwee n 6 hour s an d 2 4 hours . Alternatively , artificia l heating o r cooling , a s required , o f th e vehicl e fue l tank mayb e employe d t o achiev e a temperatur e o f 80.0+3.0° F (27.0+1.7°C ) fo r thre e hour s whil e monitoring an d recording th e ski n temperatur e o f th e fue l tank .P.1 3

(b ) Non-integrate d an d partially-integrate d system s (Figur e CXX-2) . (1 ) Vehicl e temperatur e stabilization . Drai n th e vehicl e fue l tank(s) . Th e vehicle , eithe r manufacturer-supplie d certificatio nvehicle s o r in-us e vehicles , shal l b e soake d a t 80.0+3.0° F (27.0+l.7°C ) fo r a minimu mo f si xhours . (2 ) Refueling emission s canister(s ) loading t o breakthrough . (i ) Plac e th e vehicl e i n th e SHED , ground th e vehicle , an

d remov e th e fue l tank cap(s) . (ii ) Purg e th e SHE D o f hydrocarbo n vapor , tur n o n th e mixing blower , clos e an d sea l th e SHE D doors . (iii ) Measur e th e hydrocarbo n leve l i nth e SHED . (iv ) The tank(s ) shal l b e fille d t o £h e nomina l tank capacit yo r unti l caniste r breakthroughoccur s (caniste r breakthroughi s define d a s th e poin t a t whic hth e hydrocarbo n concentratio n i n th e SHE D increase s b ya facto r o f thre e o r greate r i non e minut e o r less) , whicheve rP.1 4

occur s first , wit hth e specifie d fuel , (§86.113) . Th e temperatur e o f th e dispense d fue l shal l b e betwee n79. 0 an d 86.0° F (26. 1 t o 30.0°C) . Th e fue l dispensing rat e shal l b e betwee n -3§; 0 t o 5. 0 gal/mi n (11. 3 t o 37. 9 l/min) . I f th e vehicl e i s equippe d wit hdua l fue l tanks , eithe r fue l tank mayb e fille d first . I f caniste r breakthroughdoe s no t occur during th e firs t fueling operation , th e SHE D shal l b e opened , th e vehicl e remove d withou t starting th e engine , an d draining o f th e fue l tank(s ) initiate d withi n 1 0 minute s o f completing th e firs t fueling operation . Th e tank(s ) shal l b e drained , th e SHE D purge d o f hydrocarbo n vapors , th e vehicl e move d int o th e SHE D withou t starting th e engine , an

d th e door s close d an d sealed . Withi n 1 0 minute s o f completio n o f fue l tank draining , a second fueling operatio nshal l b e initiated . Asecon d ful l fueling o r fueling t o breakthrough , whicheve r occur s first , a s describe d abov e shal l b e performed . I f breakthroughha s no t occurred , fue l draining , SHE D purging an d resealing , an d fueling a s describe d above , shal l b e repeate d unti l breakthroughoccurs . (v ) I f th e vehicl e i s equippe d wit hdua l fue l tank s an d a commo n canister , eithe r tank mayb e fuele d first . I f th e vehicl e i s equippe d wit hdua l fue l tank s an d canister s dedicate d t o eac htank , on e caniste r shal l b e loade d t o breakthrough , th e SHE D opene d an d purge d o f hydrocarbo n vapo r an

d resealed , an

d th e secon

d caniste r loade d t o breakthrough . (vi ) Remov e th e vehicl e fro mth e SHE D withou t starting th e engine .P.1 5

12 . Aneu adde d t o read a s

' - - I Subpar t C o f Par t 8 6 i s propose d t o b e follows : Subpar t C

Emissio n Regulation s fo r 19X Xan d Late r Mode l Yea r Ne w or In-Us e 1 Light-Dut y Heavy-Dut y Procedure .

Sec . 86.20 1 86.20 2 86.20 3 86.20 4 86.20 5 86.20 6 86.20 7 86.20 8 86.20 9 86.21 0 86.21 1 86.21 2 86.21 3 86.21 4 86.21 5 Jight-DutyGasolin e Vehicles , Ne wo r In-Us e

Gasolin e Truck s an d Ne wo r In-Us e Gasolin e Vehicles ; Refueling Emission s Tes t

Genera l applicabilit y Definition s [Reserved ] Introduction ; structur e o f subpar t [Reserved ] [Reserved ] Sampling an

d analytica l system [Reserved ] [Reserved ] [Reserved ] [Reserved ] [Reserved ] Fue l specification s [Reserved ] EPAurba ndynamomete r driving schedule s 1

i

i i

»86.21 6 86.21 7 86.21 8 86.21 9 86.22 0 86.22 1 86.22 2 86.22 3 86.22 4 86.22 5 86.22 6 86.22 7 86.22 8 86.22 9 86.23 0 86.23 1 86.23 2 86.23 3 86.23 4 86.23 5 86.23 6 86.23 7 86.23 8 86.23 9 86.24 0 86.24 1 86.24 2 86.24 3 [Reserved ]

[Reserved ] [Reserved ] [Reserved ] [Reserved ] [Reserved ] [Reserved ] [Reserved ] [Reserved ] [Reserved ] [Reserved ] Tes t procedure ; overvie w [Reserved ] [Reserved ] Tes t sequence ; genera l requirement s Vehicl e preparatio n Vehicl e an

d Caniste r Preconditioning Refueling Emission s Measuremen t [Reserved ] [Reserved ] [Reserved ] [Reserved ] [Reserved ] [Reserved ] [Reserved ] [Reserved ] Record s Require d Calculation s P.1 6

>

i

-P.1 7

§86.20 1 Genera l applicability . (a ) Th e provision s o f thi s subpar t ar e applicabl e fo r testing o f bot hne wan d in-us e 19X

Xan d late r mode l yea r light-dut ygasolin e vehicles , light-dut ygasolin e truck s an

d heavy-dut ygasolin e vehicles . (b ) Provision s o f thi s subpar t appl yt o test s performe d b

ybot hth e Administrato r an d moto r vehicl e manufacturers . (c ) Th e procedur e o f thi s subpar t i s intende d t o b e performe d i nconjunctio nwit hth e exhaus t an d evaporativ e emission s test s o f Subpar t B fo r light-dut yvehicle s an d light-dut ytruck s an d i nconjunctio nwit hevaporativ e emissio ntest s o f Subpar t Mfo r heavy-dut ygasolin e vehicles , an

d i nconjunctio nwit hexhaus t emission s test s o f Subpar t Nfo r heavy-dut ygasolin e engines . Th e following section s o r part s thereof , o f Subpart s B an d M an d Appendi xI appl yt o thi s sectio nan d wil l no t b e repeate d i n thi s section :

§86.10 3 Abbreviation s §86.10 4 Sectio nnumbering ; constructio n §86.108-X

XDynamomete r §86.113-X

XFue l Specification s §86.114-X

XAnalytica l gase sP.1 8 §86.116-X

XCalibration , frequenc yan d overvie w §86.117-X

XEvaporativ e emissio n enclosur e calibration s §86.118-X

XDynamomete r calibratio n §86.i21-X

XHydrocarbo nanalyze r calibratio n §86.128-X

XTransmission s §86.129-X

XRoad load powe r tes t weigh t an d inerti a weigh t clas s determinatio n §86.136-X

XEngin e starting an d restarting §86.1203-X

XAbbreviation s §86.1213-X

XFue l specification s §86.1214-X

XAnalytica l gase s §86.1216-X

XCalibrations ; frequenc yan d overvie w §86.1217-X

XEvaporativ e emission s enclosur e calibration s §86.1218-X

XDynamomete r calibratio n §86.1221-X

XHydrocarbo n analyze r calibratio n §86.1226-X

XCalibratio n o f othe r equipmen t §86.1228-X

XTransmission s §86.1229-X

XDynamomete r load determinatio n §86.1235-X

XDynamomete r procedur e §86.1236-X

XEngin e starting an d restarting Appendi x1(a ) EPAUrba n Dynamomete r Driving Schedul e

fo r Light-Dut yVehicle s an d Light-Dut y Truck s Appendi x1(d ) EP AUrba n Dynamomete r Driving Schedul e

fo r Heavy-Dut yVehicles .P.1 9

§86.20 2 Definitions . (a ) Th e definition s o f Subpar t Aan d o f Subpar t B an d o f Subpar t Man

d o f Subpar t Nappl yt o thi s Subpart . (b ) Specifi c term s use d i nthi s subpar t ar e define d a s follows . Evaporativ e emission s canister(s ) mean s an yvapo r storag e unit(s ) tha t i s expose d t o eithe r vehicl e diurna l o r ho t soak or bot hdiurna l an d ho t soak emissions , excep t fo r vapo r storag e unit(s ) locate d i n th e primarypat ho f an d purge d byth e engin e intak e air , wheneve r th e engin e i s operated , fo r th e sol e purpos e o f storing miscellaneou s evaporativ e emission s fromthe intak e system . Fully-integrate d refueling emissio ncontro l system mean s a systemwher e vapor s resulting from refueling ar e store d i n a commo n vapo r storag e unit(s ) wit hbot h th e diurna l heating emission s an d th e ho t soak emission s o f the vehicl e an d ar e purge d througha commo n purg e system . Integrate d refueling emissio ncontro l system mean s eithe r a full yor partially-integrate d system .P.2 0

In-us e vehicl e mean s a light-dut yvehicl e o r light-dutytruc k o r a heavy-dut yvehicl e whic hi s use d o n th e publi c highway s b yth e "ultimat e purchaser " a s describe d i n Sectio n 21 6 o f th e Clea n Ai r Act , o r an y subsequen t purchaser . Non-integrate d refueling emissio n contro l systemmean s a systemwher e fue l vapor s fro mrefueling ar e store d i n a vapo r storag e uni t assigne d solel yt o th e functio n o f storing refueling vapors . Partially-integrate d refueling emissio n contro l system mean s a systemwher e vapor s resulting fro mrefueling ar e store d i n a vapo r storag e unit(s ) wit heithe r th e diurna l heating emission s o r th e ho t soak emission s o f th e vehicle . Refueling emission s canister(s ) mean s an yvapo r storag e unit(s ) tha t i s expose d t o th e vapor s generate d during refueling .P.2 1

§86.20 3 [Reserved ]P.2 2

§86.20 4 Introduction ; structur e o f subpart . Thi s subpar t describe s th e equipmen t require d an d th e testing procedure s t o followi n orde r t o performrefueling emission s test s o n light-dut ygasoline-fuele d vehicles ' an d light-dut ygasoline-fuele d truck s an d heavy-dut y gasoline-fuele d vehicles . Subpar t Aset s fort hth e testing requirement s an

d tes t interval s necessaryt o compl ywit h EPAcertificatio n procedures .P.2 3

§86.20 5 [Reserved ] §86.20 6 [Reserved ]P.2 4

§86.20 7 Sampling an d analytica l system . (a ) Componen t description . Th e component s use d i n refueling " emission s sampling system s ar e th e same component s use d in th e evaporativ e emission s sampling systems a s describe d i n §§86.10 7 an d 86.1207 , excep t fo r th e following modification s t o th e evaporativ e emissio n measuremen t enclosur e an d component s whic har e exclusiv e t o refueling testing . (1 ) Evaporativ e emissio nmeasuremen t enclosure . (i ) Th e enclosur e shal l confor mt o th e requirement s detaile d i n §86.107(a)(l ) (ii ) Mixin g blower . (A ) Light-dut yvehicle s an d light-dut ytrucks . On e o r mor e smal l blower s o r fan s wit h a tota l capacit yo f 75 0 t o 1,00 0 cfmshal l b e use d t o mi x th e content s o f th e enclosur e during canister(s ) loading t o breakthroughan

d during refueling emission s measurements . N o portio n o f th e ai r strea mshal l b e directe d toward s th e vehicle . Maintenanc e o f uniformconcentration s throughou t th e enclosur e i s importan t t o th e accuracyo f th e test .P.2 5

(B ) Heavy-dut yvehicles . On e o r mor e blower s o r fan s wit ha tota l capacit yo f 50 0 t o 75 0 cf mpe r 1,00 0 3 f t o f enclosur e volum e shal l b e use d t o mi xth e content s o f the enclosur e during canister(s ) loading t o breakthrough an d during refueling emission s measurements . Th e mixin g blowe r (s ) shal l b e arrange d suc htha t a uniform concentratio n i s maintained . N o portio no f th e ai r strea m shal l b e directe d toward s th e vehicl e (2 ) Refue1ing equipment . Th e refueling equipmen t shal l consis t o f a fue l deliverysystemwit htemperatur e contro l equipment , fue l flowsafet yswitch , servic e statio n typ e dispensing pump , hose , nozzl e an d a mete r t o measur e th e dispense d fue l volume . Afue l recirculatio n system fro mth e temperatur e contro l equipmen t t o th e nozzl e shal l b e utilize d t o avoi d trapping o f non-temperatur e controlle d fue l i n th e hose . Th e fue l deliverysystemmus t b e capabl e o f delivering fue l a t 81. 0 t o 84.0° F (27. 2 t o 28.9°C ) an d a t a flowrat e o f . from3. 0 t o 10. 0 gal/mi n(11. 4 t o 37. 9 l/min ) during th e refueling emission s measuremen t phas e o f th e test . Durin g th e caniste r loading t o breakthrough phas e o f th e tes t th e dispense d fue l temperatur e shal l b e betwee n 79. 0 an

d 86.0° F (26. 1 an

d 30.0°C) . Th e accurac yo f th e mete r for measurin g th e dispense d fue l volume shal l b e + 2 percen t a t th e tes t flowrate .P.2 6

(3 ) Temperatur e recording system . Stri p char t recorder(s ) o r an automati c dat a processo r shal l b e use d t o record vehicl e soak are a ambien t temperature , enclosur e ambien t temperature , an d dispense d fue l temperatur e a t th e nozzl e during th e test . Th e temperatur e recorder(s ) o r dat a processo r shal l record eac htemperatur e a t leas t onc e every2 0 second s (the soak are a ambien t temperatur e recorde r mayb e a continuou s recording system) . Th e recording systemshal l b e capabl e o f resolving tim e t o +15 s an d b e capabl e o f resolving temperatur e t o +0.75° F (0.42°C) . Th e temperatur e recording system(recorde r an d sensor ) shal l hav e a naccuracyo f +1.0° F (0.6°C) . Tw o ambien t temperatur e sensors , connecte d t o provid e on e averag e output , shal l b e locate d i n th e enclosure . Thes e sensor s shal l b e locate d a t th e approximat e vertica l cente r lin e o f eac hsid e wal l extending 4 inche s (1 0 cm ) (nominally ) int o th e enclosur e a t a heigh t o f 3.0+0. 5 f t (0.9+0.2m) .P.2 7

(4 ) Spille d fue l mixing blower . Anexplosion-proo f

3 3 blowe r o f 100-20 0 f t /mi n (2.8-5. 7 m/min ) capacit yi s require d t o enhanc e mixing o f vapor s fromspille d fue l throughth e enclosur e atmospher e during tests . Th e discharg e fro

mthi s blowe r shal l b e directe d towar d th e regio n o f th e enclosur e floo r wher e fue l spillag e during fueling mayoccur . I n addition , th e discharg e fromthi s blowe r shal l b e eithe r acros s o r generall yi nparalle l wit h th e directio n o f flowa t th e floo r induce d b yth e enclosur e mixing blower . Th e discharg e fro mthi s blowe r mus t no t b e i n oppositio n t o th e directio no f flowinduce d b yth e enclosur e mixing blower . §86.20 8 [Reserved ] §86.20 9 [Reserved ] §86.21 0 [Reserved ] §86.21 1 [Reserved ] §86.21 2 [Reserved ]P.2 8

§86.21 3 Fue l Specification s (a ) Fue l meeting th e specification s o f §86.11 3 o r §86.1213 , a s applicable , shal l b e employed . (b ) Fue l RVP shal l b e measure d periodicall yt o assur e complianc e wit happlicabl e requirements . A t leas t on e measuremen t shal l b e take nfro meac hbatc ho f fue l use d i n a refueling car t or underground storag e tank . Th e result s o f eac hmeasuremen t shal l b e use d fo r th e time perio d sinc e an

ypreviou s measurement , bu t shal l no t b e use d fo r an

ysubsequen t time .P.2 9 (3 ) Caniste r stabilization . (i ) Withi non e hour o f completio n o f caniste r loading t o breakthrough , th e refueling 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 flowo f vapo r from th e fue l tank t o th e refueling caniste r during th e refueling event . I f disconnected , th e ope n en d o f th e vapo r lin e leading t o th e refueling caniste r shal l b e plugged . Th e fue l tank(s ) o f th e vehicl e shal l b e draine d an d recharge d wit hth e specifie d tes t fuel , §86.11 3 o r §86.1213 , t o 9 5 percen t o f nomina l fue l tank capacit y determine d t o th e th e neares t one-tent ho f a U.S . gallo n (0.3 8 liter) . Th e temperatur e o f th e fue l prio r t o it s deliveryt o th e fue l tank(s ) shal l b e betwee n 81. 0 an d 84.0° F (27. 2 an

d 28.9°C) . (ii ) Following completio n o f fueling , th e refueling emission s canister(s ) shal l b e reconnected . Vehicl e driving t o purg e th e refueling caniste r shal l b e performe d using eithe r th e chassi s dynamomete r procedur e (A ) o r th e tes t trac k procedur e (B ) below . Fo r vehicle s equippe d wit h dua l fue l tanks , a portio n o f th e tota l require d volum e o f fue l equa l t o 8 5 percen t o f th e firs t tan k nomina l capacit y shal l b e consume d fromth e firs t tank . Then , th e second tank shal l b e selecte d a s th e fue l source , an d th e remainde r o f th e require d volume o f fue l consume d fromth e second tank .P.3 0 (A ) Chassi s dynamomete r procedure . Vehicl e drivin g o n a chassi s dynamomete r shal l consis t o f repeate d drive s o f th e Urba n Dynamomete r Driving Schedul e (UDDS ) unti l 8 5 percen t o f fue l tank capacit yha s bee nconsumed . Th e numbe r o f UDDS s require d t o consume 8 5 percen t o f tank fue l capacit y(tota l capacit yo f bot htank s whe nth e vehicl e i s equippe d wit hdua l fue l tanks ) shal l b e determine d from th e fue l econom

yo f vehicle s wit htha t refueling emissio n family-refueling emissio ncontro l systemcombinatio no nth e UDD S an

d fromth e numbe r o f gallon s t o th e neares t 0. 1 gallo n (0.3 8 liter ) whic hconstitute s 8 5 percen t o f tank volume . I f thi s fue l consume d poin t occur s par t way througha UDD S cycle , th e cycl e shal l b e complete d i nit s entirety . Fo r vehicle s equippe d wit hdua l fue l tanks , fue l switching fromth e firs t tank t o th e secon d tank shal l occu r a t th e 1 0 percen t volume o f th e firs t tank an d onl y th e las t UDD S o nth e secon d tank i s t o b e complete d i n it s entirety . During break s i nwor k schedules , betwee nshift s an d during period s whe n n o shif t i s scheduled , th e engin e shal l b e turne d of f an d th e vehicl e parke d o n th e dynamomete r (the vehicl e mayb e parke d of f o f th e dynamomete r t o facilitat e maintenanc e o r repair s i f required ) i f o n th e dynamometer , or i nth e soak are a i f i n th e soak area . A t th e star t o f th e nex t wor k shift , resumptio n o f caniste r stabilizatio nshal l b e initiate d a t th e nex t step i n th e sequence .P.3 1 (B ) Tes t trac k procedure . Vehicl e driving o na tes t trac k shal l followth e Durabilit yDriving Schedul e (DDS ) a s specifie d i n Appendi xIV an d shal l consis t o f repeate d drive s o n th e DD S unti l 8 5 percen t o f fue l tank capacit y ha s bee n consumed . I f the distanc e fro mth e emissio n laborator

yt o th e tes t trac k i s les s tha n 2. 0 mile s (3.2 3 km ) th e vehicl e mayb e drive nt o th e tes t trac k a t a spee d no t t o excee d 2 5 mph(4 0 kph) . I f th e distanc e i s greate r than 2. 0 mile s (3.2 3 km ) the vehicl e shal l b e move d t o th e tes t trac k wit hth e engin e off . Th e numbe r o f DDS s require d t o consume 8 5 percen t o f tank capacit y(tota l capacit yo f bot hfue l tank s whe nth e vehicl e i s equippe d wit hdue l fue l tanks ) shal l b e determine d fromth e fue l econom yo f th e vehicl e o nth e DD S an d fro m th e numbe r o f gallon s t o th e neares t 0. 1 gallo n(0.3 8 liter ) whic h constitute s 8 5 percen t o f tank capacity . I f thi s fue l consume d poin t occur s par t wa ythrougha la p o f th e DD S tha t la

p o f th e DD S shal l b e completed . Th e vehicl e shal l b e drive n a t a spee d no t exceeding 2 5 mphfrom th e tes t trac k t o th e laboratoryprovide d th e distanc e fromth e tes t trac k t o th e laboratorydoe s no t excee d 2. 0 mile s (3.2 3 km) . I f th e distanc e fro mth e tes t trac k tj. o th e emission s laboratoryi s greate r tha n2. 0 mile s (3.2 3 km ) th e vehicl e shal l b e move d fro mth e tes t trac k wit hth e engin e off . Fo r vehicle s equippe d wit hdua l fue l tanks , fue l suppl y switching fromth e firs t tank t o th e secon d tank shal lP.3 2

occur a t th e 1 0 percen t volume o f the firs t tank . Durin g break s i n wor k schedules , betwee n shift s an d during period s whe n n o shif t i s scheduled , th e engin e shal l b e turne d of f an d th e vehicl e eithe r parke d o n th e tes t trac k o r move d t o a storag e facilit ywit hth e engin e off . I f th e vehicl e i s move d fro

mth e tes t track , i t shal l b e returne d t o th e trac k wit hth e engin e of f whe nmileag e accumulatio ni s t o b e resumed . (4 ) Vehicl e coo l down . Withi n1 0 minute s o f completing th e 8 5 percen t fue l consumptio ndrive , th e vehicl e fue l tan

k shal l b e draine d an d filled , an

d th e vehicl e temperatur e stabilize d according t o th e procedure s i n paragraph(a)(3 ) o f thi s section .P.3 3

§86.23 3 Refueling emission s measurement . (a ) Th e evaporativ e emissio nenclosur e shal l b e purge d fo r severa l minute s immediatel yprio r t o th e test .

NOTE : I f a t an

ytim e th e hydrocarbo nconcentratio n exceed s 15,00 0 ppmC th e enclosur e shoul d b e immediatel y purged . Thi s concentratio nprovide s a 4: 1 safet yfacto r agains t th e lea

n flammabilit ylimit . (b ) Th e FI D hydrocarbo n analyze r shal l b e zeroe d an d spanne d immediatel yprio r t o th e test . (c ) I f no t alread yon , th e enclosur e mixin g fanan d th e spille d fue l mixing blowe r shal l b e turne d o n a t thi s time . (d ) Dryal l fue l fromth e interio r an d th e exterio r o f th e refueling nozzl e spout . (e ) Th e refueling emissio nmeasuremen t portio no f th e refueling contro l tes t shal l b e performe d a s follows : (1 ) Th e lin e fro

mth e fue l tank(s ) t o th e refueling emission s caniste r shal l b e connected . Remov e th e fue l tank cap(s) .P.3 4 (2 ) Withi n 5 minute s o f removing th e fue l tank cap(s) , th e tes t vehicle , wit hth e engin e shu t off , shal l b e move d int o th e enclosure . Th e tes t vehicl e window s an d luggag e compartmen t shal l b e opened . (3 ) An electrica l ground shal l b e attache d t o th e vehicle . Positio n th e spille d fue l mixin g blowe r (§86.207(a)(4)) . Th e enclosur e doo r shal l b e close d an d sealed . Th e FI D trac e shal l b e allowe d t o stabilize . (4 ) Th e dispense d fue l temperatur e recording system shal l b e started . (5 ) Th e initia l reading o f th e evaporativ e enclosur e FI D analyze r shal l b e taken . (6 ) Withi n on e minut e o f obtaining th e initia l FI D reading , th e fue l nozzl e shal l b e inserte d int o th e fille r nec k o f th e tes t vehicl e an d th e refueling operatio nshal l b e started . Th e temperatur e o f th e dispense d fue l shal l b e betwee n 81. 0 an

d 84.0° F (27. 2 an

d 28.9°C) . Th e dispensing rat e shal l b e betwee n3. 0 an d 10. 0 gal/mi n(11. 4 t o 37. 9 l/min) . Th e fue l flowshal l continu e unti l th e refueling nozzl e automati c shut-of f i s activated .P.3 5

Th e amoun t o f fue l dispense d mus t b e a t leas t 8 5 percen t o f nomina l fue l tan

k capacity , determine d t o th e neares t one-tent ho f a U.S . gallo n (0.3 8 liter) . I f automati c nozzl e shut-of f occur s prio r t o thi s point , th e nozzl e shal l b e reactivate d withi n 1 5 second s an d fue l dispensing continue d unti l automati c nozzl e shut-of f occur s an d a t leas t 8 5 percen t o f nomina l fue l tank capacit yha s bee n dispensed . Multipl e nozzl e reactivation s mayb e required . (7 ) Th e fina l reading o f th e evaporativ e enclosur e FI D analyze r shal l b e take n 60+ 5 second s following completio no f dispensing o f require d fue l volume . Th e elapse d time , i n minutes , betwee nth e initia l an d fina l FI D reading s shal l b e recorded . (8 ) Fo r vehicle s equippe d wit hmor e tha non e fue l tank , th e procedure s describe d i n paragraph s (a ) through (e)(7 ) above shal l b e performe d fo r eac hfue l tank .P.3 6

§86.23 4 [Reserved ] §86.23 5 [Reserved ] §86.23 6 [Reserved ] §86.23 7 : [Reserved ] §86.23 8 [Reserved ] §86.23 9 [Reserved ] §86.24 0 [Reserved ] §86.24 1 [Reserved ]P.3 7

§86.24 2 Record s required . Th e following informatio n shal l b e recorde d wit h respec t t o eac htest : (a ) Tes t number . (b ) Systemor devic e teste d (brie f description) . (c ) Dat e an

d tim e o f day . (d ) Instrumen t operated . (e ) Operator . (f ) Vehicle : I D number , manufacturer , mode l year , engin e family , refueling emissio n family , refueling emissio n contro l system , refueling emissio n caniste r continuou s driv e purg e mile s fo r integrate d system s an d descriptio n o f howmileag e i s determined , refueling emission s caniste r continuou s driv e purg e mile s fo r non-integrate d systems , fue l system(including numbe r o f carburetors , numbe r o f carbureto r barrels , fue l injectio n type , an

d fue l tank(s ) capacit yan d location) , basi c engin e descriptio n (including displacement , numbe r o f cylinders , turbocharge r (i f used) , an d catalys t usage) , engin e code , odomete r reading .P.3 8 (g ) Al l pertinen t instrumen t informatio n including nozzl e an

d fue l deliverysystemdescription . A s an alternative , a referenc e t o a vehicl e tes t cel l numbe r ma y b e used , iwit hadvanc e approva l o f th e Administrator , provide d tes t cel l calibratio nrecord s showth e pertinen t instrumen t information . (h ) Recorde r charts : Identif yzero , span , an d sampl e traces . (i ) Enclosur e barometri c pressur e an d ambien t temperature .

NOTE : Acentra l laboratorybaromete r mayb e used , provide d tha t individua l tes t cel l barometri c pressure s ar e show nt o b e withi n +0. 1 percen t o f th e barometri c pressur e a t th e centra l baromete r location . (j ) Temperatures : soak area ; dispense d fuel , initia l an

d final . (k ) Fue l dispensing rate(s) . (1 ) Dispense d fue l volume . (m ) Tes t fue l RVPP.3 9 (n ) Al l additiona l informatio n necessaryfo r th e calculation s specifie d i n §86.243 .P.4 0

§86.24 3 Calculations . (a ) Th e calculatio no f th e ne t hydrocarbo nmas s chang e in-th e enclosur e i s used_t o determin e refueling mas s emissions . Th e mas s i s calculate d fro minitia l an

d fina l hydrocarbo nconcentration s i n pp mcarbon , initia l an d fina l enclosur e ambien t temperatures , initia l an d fina l barometri c pressures , an d ne t enclosur e volum e usin g th e evaporativ e emission s equatio n o f §86.14 3 o r §86.124 3 a s applicable , wit hth e hydrogen-carbo nrati o equa l t o tha t o f diurna l emissions . Fo r vehicle s wit hmultipl e tanks , th e result s fo r eac htank shal l b e calculate d an d the n summe d t o determin e overal l refueling emissions . (b ) Th e fina l result s fo r compariso nwit hth e refueling contro l emissio n standard shal l b e compute d by dividing th e tota l refueling mas s emission s b yth e tota l gallon s o f fue l dispense d i n th e refueling test . (c ) Th e result s o f al l emissio n test s shal l b e rounded , i n accordanc e wit hASTME 29-67 , t o th e numbe r o f decima l place s containe d i nth e applicabl e emissio n standar d expresse d t o on e additiona l significan t figure .P.4 1

13 . Ane wSectio n86.1207-X Xi s propose d t o b e adde d t o Subpar t M , t o rea d a s follows : §86.1207-X

XSampling an d analytica l system ; evaporativ e emissions . (a ) Componen t descriptio no f evaporativ e emission s sampling system . The following component s wil l b e use d i n evaporativ e emission s sampling system s fo r testing unde r thi s subpart . (1 ) Evaporativ e emissio n measuremen t enclosure . Th e enclosur e shal l b e readil ysealable , rectangula r i n shape , wit hspac e fo r personne l acces s t o al l side s o f th e vehicle . Th e side s o f th e enclosur e shal l b e equippe d wit h on e o r mor e port s t o provid e acces s t o th e fue l tank fille r cap(s ) o f tes t vehicle s an d t o allowfueling o f th e tes t vehicl e fro

ma fue l nozzl e an d hos e locate d outsid e o f th e enclosure . Acces s por t sealing device s shal l b e capabl e o f maintaining gas-tightnes s o f th e enclosur e a t al l times . A s a nalternativ e t o th e acces s port s an d sealing boots , a manufacture r ma ylocat e th e fue l dispensing hos e an d nozzl e i n th e enclosure , provide d i t i s demonstrate d tha t th e hos e an d nozzl e contribut e n o hydrocarbon s t o th e enclosur e by an ymean s an

d als o provide d tha t nozzl e activatio n and/o r reactivatio n ca nb e performe d safel yan d tha t th e mean s fo r activating th e nozzl e shal l no t introduc e air ,hydrocarbons , o r othe r material s int o th e enclosur e durin g

a test . Whe n sealed , th e enclosur e shal l b e ga s tigh t i n accordanc e wit h§86.1217 . Interio r surface s mus t b e impermeabl e t o hydrocarbons . On e surfac e shoul d b e o f flexible , impermeabl e materia l t o allowfo r mino r volum e change s resulting fro mtemperatur e changes . Wal l desiq n shoul d promot e maximu mdissipatio no f hea t an d i f artificia l cooling i s used , interio r surfac e temperature s shal l no t b e les s than 68.0° F (20.0°C) . (2 ) Evaporativ e emissio nhydrocarbo nanalyzers . A hydrocarbo nanalyze r utilizing th e hydroge n flame ionizatio n principl e (FID ) shal l b e use d t o monito r th e atmospher e withi n th e enclosure . Instrumen t bypas s flo w mayb e returne d t o th e enclosure . Th e FI D shal l hav e a respons e time t o 9 0 percen t o f fina l reading o f les s tha n 1. 5 seconds , an

d b e capabl e o f meeting th e following performanc e requirement s expresse d a s a functio no f C .. , wher e C . . i s th e specifi c enclosur e hydrocarbo nlevel , i n ppm , corresponding t o th e evaporativ e emissio nstandard :(i ) Stabilit yo f th e analyze r shal l b e bette r tha n

0.0 1 C. , ppma t zer o an d span ove r a 15-minut e perio d o n al l range s used . (ii ) Repeatabilit yo f th e analyzer , expresse d a s on e standard deviation , shal l b e bette r tha n 0.00 5 C . , ppm o n al l range s used . (3 ) Evaporativ e emissio n hydrocarbo ndat a recording system . Th e electrica l outpu t o f th e FI D shal l b e recorde d a t leas t a t th e initiatio nan d terminatio n o f eac hdiurna l o r ho t soak . Th e recording mayb e b ymean s o f a stri p char t potentiometri c recorder , b yus e o f anon-lin e compute r systemo r othe r suitabl e means . I nan ycase , th e recording systemmus t hav e operationa l characteristic s (signa l t o nois e ratio , spee d o f response , etc. ) equivalen t t o o r bette r tha n thos e o f th e signa l sourc e bein g recorded , an

d mus t provid e a permanen t record o f results . Th e record shal l showa positiv e indicatio no f th e initiatio n an

d completio no f eac hdiurna l o r ho t soak along wit hth e tim e elapse d betwee n initiatio nan d completio n o f eac hsoak . (4 ) Tank fue l heating system . Th e tank fue l heating systemshal l consis t o f a hea t sourc e an d a temperatur e controller . Atypica l hea t sourc e i s a 200 0 Wheating pad . Othe r source s mayb e use d a s require d byP.4 4

circumstances . Th e temperatur e controlle r mayb e manual , suc ha s a variabl e voltag e transformer , o r mayb e automated . Th e heating systemmus t no t caus e ho t spot s o n th e tank wette d surfac e whic hcoul d caus e loca l overheating o f th e fuel . Hea t mus t no t b e applie d t o th e vapo r i nth e tan k above th e liqui d fuel . Th e temperatur e controlle r mus t b e capabl e o f controlling th e fue l tank temperatur e during th e diurna l soak t o withi n+3.0° F (l.7°c ) o f th e following equation :

F = T + 0.4 t o

o r fo r S I units :

C = T Q + (2/9) t

where : F = Temperatur e i n ° F C = Temperatur e i n ° C t = Tim e sinc e star t o f tes t i n minute s T = Initia l temperatur e i n ° F (or i n ° C fo r S I units ) (5 ) Temperatur e recording system . Stri p char t recorder(s ) o r a

n automati c dat a processo r shal l b e use d t o record enclosur e ambien t an d vehicl e fue l tank temperatur e during th e evaporativ e emission s test . Th e temperatur eP.4 5

recorde r or dat a processo r shal l record eac htemperatur e a t leas t onc e everyminute . Th e recording systemshal l b e capabl e o f resolving time t o +15 s an d capabl e o f resolving temperatur e t o +0.75° F (0.<t?.°C) . Th e temperatur e recording system(recorde r an d sensor ) shal l hav e an accurac yo f +3.0° F (1.7°C) . Th e recorde r (dat a processor ) shal l hav e a time accuracyo f +15 s an d a precisio n o f +15s . Tw o ambien t temperatur e sensors , connecte d t o provid e on e averag e output , shal l b e locate d i n th e enclosure . Thes e sensor s shal l b e locate d a t th e approximat e vertica l centerlin e o f eac hsid e wal l extending four inche s (nominally ) int o th e enclosur e a t a heigh t o f 3.0+0. 5 f t (0.9+0. 2 m ) . Th e vehicl e fue l tan

k temperatur e senso r shal l b e locate d i n th e fue l tank s o a s t o measur e th e temperatur e o f th e prescribe d tes t fue l a t the approximat e mid-volum e o f th e fuel . Manufacturer s shal l arrang e tha t vehicle s furnishe d fo r testing a t Federa l certificatio n facilitie s b e equippe d wit hiron-constantan Typ e J thermocouple s fo r measuremen t o f fue l tan

k temperature . (6 ) Purg e blower . On e o r mor e portabl e o r fixe d blower s shal l b e use d t o purg e th e enclosure . Th e blower s shal l hav e sufficien t flowcapacit yt o reduc e th e enclosur e hydrocarbo n concentratio n fromth e tes t leve l t o th e ambien t leve l betwee n tests . Actua l flowcapacit ywil l depend upo n th e time availabl e betwee n tests .P.4 6 (7 ) Mixin g blower . On e o f mor e blower s o r fan s wit h 3 a tota l capacit yo f 25 0 t o 75 0 cf mpe r 100 0 f t o f enclosur e volum e shal l b e use d t o mi xth e content s o f th e enclosureidurin g evaporativ e emissio ntesting . Th e mixin g blower(s ) shal l b e arrange d suc htha t a uniform concentratio n i s maintained . Maintenanc e o f uniform concentration s throughou t the enclosur e i s importan t t o th e accurac yo f th e test . (8 ) Fue1ing eguipment . Th e fueling equipmen t shal l consis t o f a fue l deliverysystem wit htemperatur e contro l equipment , fue l flowsafet yswitch , servic e statio n typ e dispensing pump , hose , nozzl e an d a mete r t o measur e th e dispense d fue l volume . Afue l recirculatio nsystemfrom th e temperatur e contro l equipmen t t o th e nozzl e shal l b e utilize d t o avoi d trapping o f non-temperatur e controlle d fue l i n th e hose . Th e fue l deliverysystem mus t b e capabl e o f delivering fue l a t 79. 0 t o 86.0° F (26. 1 t o 30.0°C ) an d a t a flo wrat e o f fro m3. 0 t o 10. 0 gal/mi n(11. 4 t o 37. 9 l/min) .P.4 7

7 . Ane wSectio n86.1230-X Xi s propose d t o b e adde d t o Subpar t M , t o read a s follows : §86.1230-3_< Tes t sequence ; genera l requirements .

Th e tes t sequence s show n i nFiqure s MXX-lO a an d MXX-lObshowth e step s encountere d a s th e test , vehicl e underqoe s th e procedure s subsequentl ydescribe d t o determin e conformit ywit hthe standard s se t forth . Figur e MXX-lO a show s tes t sequence s t o b e use d wit hvehicle s equippe d wit hfull yintegrate d refueling emission s contro l systems . Figur e MXX-lObshow s th e tes t sequenc e t o b e use d wit hal l othe r refueling emissio ncontro l systemdesigns . Ambien t temperatur e level s encountere d b yth e tes t vehicl e shal l no t b e les s tha n 68.0° F (20.0°C ) no r mor e tha n 86.0° F (30.0°C) . Th e temperature s monitore d during testing mus t b e representativ e o f thos e experience d b yth e tes t vehicle . Th e vehicl e shal l b e approximatel yleve l during al l phase s o f th e tes t sequenc e t o preven t abnorma l fue l distribution .P.4 8

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8 . Ane wSectio n 86.1231-X Xi s propose d t o b e added t o Subpar t M , t o read a s follows : §86.1231-X

XVehicl e preparation . (a ) Prepar e th e fue l tank(s ) for recording th e temperatur e o f th e prescribe d tes t fue l a t th e approximat e mid-volume o f th e fue l whe nth e tank i s 4 0 percen t full . (b ) Provid e additiona l fitting s an d adapters , a s required , t o accommodat e a fue l drai n a t th e lowes t poin t possibl e i n th e tank(s ) a s installe d o n th e vehicle . (c ) Fo r non-integrate d an d partiall yintegrate d refueling contro l systems , provid e valving o r othe r mean s t o allowloading o f evaporativ e emission s canister(s ) no t connecte d t o th e vehicl e fue l tank . (d)(1 ) Anyvapo r storag e devic e whic hadsorb s H C vapor s an

d subsequentl yrelease s themt o th e engin e inductio n systemduring vehicl e operatio nshal l b e subjecte d t o a minimu mo f 3 0 load-purge ( , cycle s o r th e equivalen t thereo f (4,00 0 mile s o r mor e o f actua l in-us e vehicl e servic e accumulatio nshal l b e considere d equivalent) . On e load-purg e cycl e shal l b e accomplishe d b y conducting on e o f th e following procedures :P.5 1 (i ) Vehicl e Procedure . Park a fully-warmvehicl e ( a vehicl e tha t ha s bee n drive n fo r a t leas t 1 5 minutes ) fo r a time perio d o f a t leas t 3 hours . Fil l th e fue l tank(s ) wit htest"fuel , a s specifie d i n §86.1213 , t o th e prescribe d "tan k fue l volume " a s define d i n §86-082-2 . Tes t fue l shal l b e a t roomtemperature . Th e vehicl e shal l the nb e drive n througha t leas t on e cycl e o f th e HD V referenc e (transient ) urba n dynamomete r driving schedule . (ii ) LaboratoryProcedure . Flo wgasolin e vapor s int o a pre-purge d vapo r storag e devic e unti l a t leas t 1 0 percen t o f th e inpu t H C mas s flowrat e i s passing throughth e device . Purg e th e devic e wit ha volum e o f ai r whic hha s a temperatur e n o highe r tha n tha t whic hwoul d b e drawn throughth e devic e i f i t wer e installe d o nth e tes t vehicl e an d th e vehicl e wa s operate d according t o th e HD V referenc e (transient ) urba ndynamomete r driving schedule . Th e vapo r flowrate , th e metho d use d t o generat e th e vapors , th e ai r flowrate , an

d th e ai r temperatur e shal l b e recorded . I f pre-blende d ga s i s used , the n th e compositio nan d characteristic s o f th e ga s shal l b e recorded .

• j ' (2 ) Te nload-purg e cycle s accumulate d immediatel y prio r t o testing shal l b e conducte d according t o th e metho d i n paragraph(d)(l)(i ) o f thi s section . Th e preceding 2 0 cycle s (minimum ) shal l b e conducte d according t o eithe r o f th e method s i n paragrap h(d)(l)(i ) o r (ii ) o f thi s section .P.5 2

16 . Ane wSectio n86.1232-X Xi s propose d t o b e adde d t o Subpar t M , t o read a s follows : §86.1232-X

XVehicl e preconditioning . (a ) During an

yperio d tha t th e vehicl e i s parke d out-of-door s awaiting testing , th e fue l tan k cap(s ) shal l b e remove d t o preven t unusua l loading o f th e canister(s) . During thi s tim e car e mus t b e take nt o preven t entryo f wate r o r othe r contaminate s int o th e fue l tank . During an y perio d tha t th e vehicl e i s parke d i n th e tes t are a awaiting testing , the fue l tank cap(s ) mayb e i nplace . Th e vehicl e shal l b e move d int o th e tes t are a an d th e following operation s performed : (1 ) Th e refueling emissio ncanisters(s) , an d th e evaporativ e emission s canister(s ) i f th e vehicl e i s s o equipped , shal l b e loade d t o breakthrougha s specifie d below . Canister(s ) shal l no t b e purge d prio r t o beginnin g thi s sequence . (i ) Drai n th e vehicl e fue l tank(s) .P.5 3

(ii ) Vehicl e Temperatur e Stabilization . Th e vehicl e shal l b e soake d a t a temperatur e betwee n68. 0 an d 86.0° F (20. 0 an

d 30.0°C ) fo r a minimu mo f si xhours . Thi s temperatur e stabilizatio nstep mayb e omitte d o n vehicle s whic har e alread

ytemperatur e stabilizatio na s a resul t o f storag e i n th e tes t area . (iii ) Canister(s ) loading t o breakthrough .

NOTE : I f a t an

ytime th e hydrocarbo n concentratio n exceed s 15,00 0 pp

mC th e enclosur e shoul d b e immediatel y purged . Thi s concentratio n provide s a 4: 1 safet yfacto r agains t th e lean flammabilit ylimit . (A ) Evaporativ e emission s canister(s) . Fo r vehicle s equippe d wit heithe r non-integrate d o r partiall yintegrate d refueling emissio ncontro l systems , th e evaporativ e canister(s ) shal l b e loade d t o breakthrough . (I) Fo r vehicle s wit hevaporativ e emission s canister s whic har e no t connecte d t o th e fue l tank , th e manufacturer s shal l recommend a procedur e fo r loading thes e canister s an

d shal l receiv e approva l b yth e Administrato r prio r t o th e us e o f the recommende d procedure .P.5 4 (2 ) Fo r vehicle s equippe d wit hevaporativ e emissio n canister s connecte d t o th e fue l tank , th e following procedur e shal l b e performe d t o loa d th e canister s t o breakthroughusing hydrocarho n vapor s generate d b ydiurna l hea t builds : {i) Th e evaporativ e emissio n enclosur e shal l b e purge d fo r severa l minutes . (ii ) I f no t alread yon , th e evaporativ e enclosur e mixing fa n shal l b e turne d o na t thi s time . (iii ) Immediatel yprio r t o th e diurna l hea t build , th e refueling 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 tank t o th e refueling caniste r during th e fueling event . I f disconnected , th e ope n en d o f th e vapo r lin e leading t o th e refueling caniste r shal l b e plugged . Th e fue l tank(s ) o f th e prepare d vehicl e shal l b e draine d an

d recharge d wit htes t fuel , a s specifie d i n §86.1213 , t o th e "tan k fue l volume " define d i n§86.082-2 . Th e temperatur e o f th e fue l prio r t o it s ..deliver yt o th e fue l tank(s ) shal l b e betwee n 45. 0 an d 60.0° F (7. 2 an d 16.0°C) . Th e fue l tank cap(s ) i s no t installe d unti l th e diurna l hea t buil d begins .P.5 5

(iv ) Following fueling , bot hope nend s o f th e vapo r line shal l b e plugged , or i f a diverte r valv e i s employed , it s exi t plugged . I n bot hcases , th e evaporativ e caniste r remain s connecte d t o th e fue l tank . (v ) Th e tes t vehicle , wit hth e engin e shu t off , shal l b e move d int o th e evaporativ e emissio nenclosure , th e vehicl e shal l b e grounded , th e fue l tank temperatur e senso r shal l b e connecte d t o th e temperatur e recording system , and , i f required , th e hea t sourc e shal l b e properl y positione d wit hrespec t t o th e fue l tank(s ) and/o r connecte d t o th e temperatur e controller . (vi ) Th e temperatur e recording systemshal l b e started . (vii ) Th e fue l mayb e artificiall yheate d t o th e starting diurna l temperature . (viii ) Whe n th e fue l temperatur e recording system reache s a t leas t 58.0° F (14.0°C) , immediately : instal l fue l tank s cap(s) ; tur n of f purg e blower , i f no t alread yoff ; clos e an

d sea l enclosur e door s an d initiat e measuremen t o f th e hydrocarbo n leve l i n th e SHED .(ix ) Whe n th e fue l temperatur e recording system

reache s 60.0+2.0° F (16.0+1.l°C) , immediatel ystar t th e diurna l hea t build . (x ) Th e fue l shal l b e heate d i nsuc ha waytha t it' s temperatur e chang e conform s t o th e following functio nt o withi n +4.0° F ( ± 2.2°C) :

F = T + 0.4 t o fo r S I units , C = T Q + (2/9) t where : F = fue l temperature , °F . C = fue l temperature , °C . t = time sinc e beginning o f test , minutes . T = initia l temperatur e i n ° F (or i n ° C fo r S I units ) (xi ) A s soo n a s breakthroughoccur s (caniste r breakthroughi s define d a s th e poin t a t whic hth e hydrocarbo n concentratio ni nth e SHE D increase s b ya facto r o f thre e o r greate r i non e minut e o r les^s ) o r th e fue l temperatur e reache s 84.0° F (28.9°C) , whicheve r occur s first , th e hea t sourc e shal l b e turne d off , th e enclosur e door s shal l b e unseale d an d opened , an

d th e vehicl e fue l tank cap(s ) shal l b e removed .I f breakthroughha s no t occurre d b yth e tim e th e fue l temperatur e reache s 84.0°F , th e vehicl e shal l b e remove d (wit hengin e shu t off ) fro mthe evaporativ e emissio n enclosure? ; an

d th e entir e procedur e outline d i n (a)(1)(iii)(A)(2 ) o f thi s sectio n shal l b e repeate d a s many time s a s necessaryunti l breakthroughoccurs . Upo n completio n o f loading o f th e evaporativ e caniste r t o breakthrough , drai n th e heate d fue l fromth e fue l tank an d connec t th e refueling canister . (B ) Refueling emission s canister(s) . (1) Plac e th e vehicl e i n th e SHE D i f no t alread yi n th e SHED . Ground th e vehicle . Remov e th e fue l tan k cap(s) . (2 ) Purg e th e SHE D o f hydrocarbo nvapor , tur no nth e mixing blower , clos e an d sea l th e SHE D doors . (3 ) Star t measuremen t o f th e hydrocarbo n leve l i n th e SHED . (4_ ) Th e tank(s ) shal l b e fille d t o th e nomina l tank capacit yor unti l caniste r breakthroughoccur s (caniste r breakthroughi s define d a s th e poin t a t whic hth e hydrocarbo nconcentratio ni n th e SHE D increase s b ya facto r o f thre e or greate r i n on e minut e o r less) , whicheve r occur s first , wit htes t fuel , a s specifie d i n §86.1213 .Th e temperatur e o f th e dispense d fue l shal l b e betwee n

79. 0 an

d 86.0° F (26. 1 an d 30.0°C) . Th e fue l dispensing rat e shal l b e betwee n 3. 0 an d 5. 0 gal/mi n(11. 3 an d 18. 9 l/min) . I f th e vehicl e i s equippe d wit hdua l fue l tank s eithe r fue l tank mayb e fille d first . I f caniste r breakthroughdoe s no t occur during th e firs t ful l fueling operation , th e SHE D shal l b e opened , th e vehicl e remove d withou t starting th e engine , an d draining o f th e fue l tank(s ) shal l b e initiate d withi n 1 0 minute s o f completing th e firs t fueling operation . Th e tank(s ) shal l b e drained , th e SHE D purge d o f hydrocarbo n vapors , th e vehicl e move d int o th e SHE D withou t starting th e engine , an d th e door s close d an

d sealed . Withi n 1 0 minute s o f completio no f fue l tan k draining , a second fueling operatio nshal l b e initiated . Asecon d ful l fueling o r fueling t o breakthrough , whicheve r occur s first , a s describe d abov e shal l b e performed . I f breakthroughha s no t occurred , fue l draining , SHE D purging an d resealing , an

d fueling a s describe d above , shal l b e repeate d unti l breakthrough occurs . (5) I f th e vehicl e i s equippe d wit h,,dua l fue l tank s an d a commo n canister , eithe r fue l tank mayb e fille d first . I f th e vehicl e i s equippe d wit hdua l fue l tank s an d canister s dedicate d t o eac htank , on e caniste r shal l b e loade d t o breakthrough , th e SHE D opene d an d purge d o f hydrocarbo n vapor s an d resealed , an

d th e second caniste r loade d t o breakthrough .(6 ) Remov e th e vehicl e fro mth e SHE D withou t starting th e engine . (2 ) -Vehicl e fueling . Withi non e hou r o f loading th e canister(s ) t o breakthrough , th e refueling emissio n canister(s ) shal l b e disconnected . Th e fue l tank(s ) shal l b e draine d throughth e provide d fue l tank(s ) drain(s ) an d fille d wit htes t fuel , a s specifie d i n§86.1213 , t o th e tank fue l volume " define d in §86.082-2 . Th e refueling emissio ncanister(s ) shal l b e reconnected . (3 ) Dynamomete r dr ive . Withi non e hour o f bein g fuele d th e vehicl e shal l b e placed , eithe r b ybein g drive n o r pushed , o na dynamomete r an d operate d throughon e HDV Urba n Dynamomete r Driving Schedul e tes t procedure , describe d i n §86.121 5 an d Appendi xI . Ates t vehicl e ma y no t b e use d t o se t dynamomete r horsepower . (b ) Withi n five minute s o f completio no f th e preconditioning drive , th e vehicl e shal l b e drive nof f th e dynamomete r an

d parked , an

d th e engin e turne d off . Th e vehicl e mayb e pushe d t o it s parking locatio nafte r it s engin e ha s bee n turne d off . Th e vehicl e shal l b e store d fo r no t les s tha n 1 0 hour s no r fo r mor e tha n3 5 hour s prio r t o th e diurna l hea t build .17 . Ane wSectio n86.1233-X Xi s propose d t o b e adde d t o Subpar t M , t o read a s follows : §86.1233-X

XDiurna l breathing los s test . (a ) Vehicle s equippe d wit hfully-integrate d refueling emission s contro l systems . (1 ) Following vehicl e preparatio nan d vehicl e preconditioning procedure s describe d i n §§86.123 1 an d 86.123 2 the tes t vehicl e shal l b e allowe d t o soak fo r a perio d o f no t les s tha n1 2 o r mor e tha n 3 6 hour s prio r t o vehicl e operation . Th e diurna l tes t shal l star t no t les s tha n i O o r mor e tha n3 5 hour s afte r th e en d o f th e preconditioning procedure . Th e star t o f th e vehicl e operatio n shal l follo wth e en d o f th e diurna l tes t withi n on e hour . (2 ) Th e evaporativ e emissio n enclosur e shal l b e purge d fo r severa l minute s immediatel yprio r t o th e test .P.6 1

NOTE : I f a t anytime th e hydrocarbo n concentratio n exceed s 15,00 0 ppmC th e enclosur e shoul d b e immediatel y purged . Thi s concentratio n provide s a 4: 1 safet yfacto r agains t th e lean flammabilit ylimit . (3 ) Th e FI D hydrocarbo n analyze r shal l b e zeroe d an d spanne d immediatel yprio r t o th e test . (4 ) I f no t alread yon , th e evaporativ e enclosur e mixing fan shal l b e turne d on a t thi s time . (5 ) Immediatel yprio r t o th e diurna l breathing los s test , th e refueling 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 wo f vapo r fromth e fue l tank t o th e refueling caniste r during th e fueling event . I f disconnected , th e ope n en d o f th e vapo r lin e leading t o th e refueling caniste r shal l b e plugged . Th e fue l tank(s ) o f th e prepare d vehicl e shal l b e draine d an d recharge d wit h tes t fuel , a s specifie d i n §86.1213 , t o th e "tan k fue l volume " define d i n §86.082-2 . Th e temperatur e o f th e fue l prio r t o it s deliveryt o th e fue l tank(s ) shal l b e betwee n 45. 0 an d 60.0° F (7. 2 an

d 16.0°C) . Th e fue l tank cap(s ) i s no t installe d an d th e refueling emission s contro l canister(s ) i s no t reconnecte d unti l th e diurna l hea t buil d begins .(6 ) Th e tes t vehicle , wit hth e engin e shu t off ,

shal l b e move d int o the evaporativ e emissio nenclosure , th e tes t vehicl e window s an d an ystorag e compartment s shal l b e opened , th e fue l tank temperatur e senso r shal l b e connecte d t o the temperatur e recording system , and , i f required , th e hea t sourc e shal l b e properl ypositione d wit hrespec t t o th e fue l tank(s ) and/o r connecte d t o th e temperatur e controller . (7 ) Th e temperatur e recording systemshal l b e started . (8 ) Th e fue l ma yb e artificiall yheate d t o th e starting diurna l temperature . (9 ) Whe n th e fue l temperatur e recording system reache s a t leas t 58.0° F (14.0°C) , immediately : (i ) Instal l fue l tank cap(s ) an d reconnec t refueling emission s contro l canister(s) . (ii ) Tur nof f purg e blowers , i f not , alread yof f a t thi s time . (iii ) Clos e an

d sea l enclosur e doors . (10 ) Whe n th e fue l temperatur e recording system reache s 60.0+2.0° F (16.0+1.1°C) , immediately :(i ) Analyz e enclosur e atmospher e fo r hydrocarbon s

an d record . Thi s i s th e initia l (time = 0 minutes ) hydrocarbo n concentration , CHC ,. , require d i n§86.1243 . (ii ) Recor d barometri c pressur e reading . Thi s i s th e initia l (tim

e = 0 minutes ) barometri c pressure , P.. , require d i n§86.1243 . (iii ) Recor d enclosur e ambien t temperature . Thi s i s th e initia l (time = 0 minutes ) enclosur e ambien t temperature , T. , require d i n §86.1243 . (iv ) Star t diurna l hea t buil d an d record time . Thi s commence s th e 60+ 2 minut e tes t period . (11 ) Th e fue l shal l b e heate d i nsuc ha waytha t it s temperatur e chang e conform s t o th e following functio n t o withi n +3.0° F (+1.6°C) :

F = T o +0.4 t

fo r S I units ,

C = T „ + (2/9) twhere :

F = fue l temperature , ° F C = fue l temperature , ° C t = time sinc e beginning o f test , minutes . T 0 = initia l temperatur e i n° F (or i n° C fo r S I units )

Afte r 60+ 2 minute s o f heating , th e fue l temperatur e ris e shal l b e 24.0+1.0° F (13.3+0.5°C) . (12 ) Th e FI D hydrocarbo nanalyze r shal l b e zeroe d an d spanne d immediatel yprio r t o th e en d o f th e diurna l test . (13 ) Th e en

d o f th e diurna l breathing los s tes t occur s 60+ 2 minute s afte r th e hea t buil d begins , paragrap h (I0)(iv) . Analyz e the enclosur e atmospher e fo r hydrocarbon s an

d record . Thi s i s th e fina l (time = 6 0 minutes ) hydrocarbo n concentration , c u C f require d i n §86.1243 . Th e time (or elapse d time ) o f thi s analysi s shal l b e recorded . (i ) Record barometri c pressur e reading . Thi s i s th e fina l (tim

e = 6 0 minutes ) barometri c pressure , P^ , require d i n§86.1243 .(ii ) Recor d enclosur e ambien t temperature . Thi s i s

th e fina l (tim

e = 6 0 minutes ) enclosur e ambien t temperature , T f , require d i n§86.1243 . (14 ) Th e hea t sourc e shal l b e turne d of f an d th e enclosur e door s unseale d an d opened . (15 ) Th e hea t sourc e shal l b e move d awayfromth e vehicle , i f required , and/o r disconnecte d from th e temperatur e controller , the fue l tank temperatur e senso r shal l b e disconnecte d fro mthe temperatur e recordin q system , th e tes t vehicl e window s an d an ystorag e compartment s mayb e close d an d th e tes t vehicle , wit hth e engin e shu t off , shal l b e remove d fro mth e evaporativ e emissio n enclosure . (16 ) Fo r vehicle s wit hmultipl e tanks , th e larges t tank shal l b e designate d a s th e primarytank an d shal l b e heate d i n accordanc e wit hth e procedur e describe d i n paragraph(11 ) o f thi s section . Al l othe r tank s shal l b e designate d a s auxiliarytank s an d shal l underg o a simila r hea t buil d suc htha t th e fue l temperatur e shal l b e withi n 3.0° F (1.6°C ) o f the primarytank .(b ) Vehicle s ecniippe d wit hnon-integrate d an d partially-integrate d refueling emission s contro l systems . (1 ) VOverview (i ) Vehicle s equippe d wit heithe r non-integrate d o r partially-integrate d refueling emission s contro l system s shal l b e require d t o underg o tw o diurna l hea t build s an d a diurna l breathing los s test . Th e firs t o f thes e hea t build s occur s afte r vehicl e preparatio n an d preconditioning , an d befor e th e star t o f vehicl e operation . Th e secon d diurna l hea t buil d occur s afte r completio n o f th e ho t soak emission s test . Evaporativ e emission s ar e no t measure d during eithe r o f thes e firs t tw o diurna l hea t builds , s o tha t an evaporativ e emission s enclosur e i s no t required . Th e diurna l breathing los s tes t occur s directl yfollowing th e secon d hea t build . Evaporativ e emission s shal l b e measure d during thi s fina l test , s o tha t i t shal l b e performe d i nanevaporativ e emission s enclosure . (ii ) Th e procedur e t o b e use d t o performth e firs t an d secon d diurna l hea t build s i s essentiall yidentica l wit h th e diurna l breathing los s tes t require d fo r vehicle s equippe d wit hfully-integrate d refueling emission s contro l systems , excep t tha t evaporativ e emission s ar e no t measured . Thi s procedur e i s presente d i n paragrap h(b)(3 )below . Asimila r procedur e shal l b e carrie d ou t t o perform

the diurna l breathing los s test , a s presente d i n paragrap h (b)(4 ) below . (iii ) Th e keydifferenc e betwee nth e diurna l breathing los s tes t require d for vehicle s equippe d wit h fully-integrate d refueling emission s contro l systems , an d th e second diurna l hea t buil d an d th e diurna l breathing los s tes t require d fo r vehicle s wit hpartially

- o r non-integrate d contro l systems , i s tha t th e latte r tw o test s ar e carrie d ou t wit ha ninitia l fue l temperatur e o f 72.0° F instead o f 60.0°F , an d a fina l fue l temperatur e o f 96.0° F instead o f 84.0°F . Th e tw o diurna l test s a t thes e highe r temperature s ar e intende d t o ensur e tha t vehicle s equippe d wit hpartially

- o r non-integrate d refueling systems provid e contro l o f in-us e evaporativ e emission s a t a leve l essentiall yequivalen t t o tha t o f vehicle s wit h full yintegrate d refueling systems . (2 ) Tes t Sequenc e (i ) Following vehicl e preparation , an d vehicl e preconditioning procedure s describe d i n §§86.123 1 an d 86.1232 , th e tes t vehicl e shal l b e allowe d t o soak fo r a perio d o f no t les s tha n 1 2 no r mor e tha n3 6 hour s prio r t o vehicl e operation . Th e firs t diurna l hea t buil dP.6 8

shal l start , no t les s tha n 1 0 o r mor e tha n3 5 hour s afte r th e en d o f the preconditioning procedur e an d b e conducte d according t o paragraph(b)(3 ) o f thi s section . Sinc e n o evaporativ e measurement s ar e necessary , an evaporativ e enclosur e i s no t required . The star t o f vehicl e operation , describe d i n §86.123 7 shal l followth e en d o f th e firs t diurna l hea t buil d withi non e hour . (ii ) Withi n 1 5 minute s o f completing th e ho t soak emission s test , describe d i n§86.1238 , th e second diurna l hea t buil d shal l b e initiated . Th e second diurna l hea t buil d shal l b e conducte d according t o paragraph(b)(3 ) o f thi s section . Sinc e n o evaporativ e measurement s ar e necessary , a

n evaporativ e enclosur e i s no t required . Withi n 1 0 minute s o f completing th e secon d diurna l hea t build , draining o f th e heate d fue l fro m th e fue l tanks(s ) shal l b e initiated . Th e vehicl e shal l b e temperatur e stabilize d a t a temperatur e o f 68. 0 t o 86.0° F (20. 0 t o 30.0°C ) fo r no t les s tha n 6 hour s no r mor e tha n2 4 hour s betwee n fue l draining an d fueling t o th e "tan k fue l volume " define d i n§86.082- 2 whic hpreced s th e diurna l breathing los s tes t i n th e evaporativ e enclosure . ,< (iii ) Following completio no f th e second diurna l hea t build , th e diurna l breathing los s tes t i s t o b e conducte d according t o paragraph(b)(4 ) o f thi s section . Evaporativ e emission s measurement s ar e required , s o tha tthi s procedur e mus t b e carrie d ou t i nan evaporativ e

emission s enclosure . (3 ) '.\ Procedure s for Firs t an d Second Diurna l Hea t Builds : (i ) Disconnec t refueling canister(s ) (Se e paragrap h (a)(6)) . (ii ) Drai n th e fue l tank(s ) an d recharg e wit htes t fuel , a s specifie d i n §86.1213 , t o th e "tan k fue l volume " define d i n§86.082-2 . Th e temperatur e o f th e fue l prio r t o it s deliveryt o th e fue l tank(s ) shal l b e betwee n 45. 0 an d 60.0° F (7. 2 an

d 16°C ) for th e firs t fueling associate d wit h th e firs t hea t buil d an d betwee n60. 0 an

d 72.0° F (15. 6 an

d 22.2°C ) fo r th e second fueling associate d wit hth e second hea t build . Th e fue l tank temperatur e senso r shal l b e connecte d t o th e temperatur e recording systeman d th e temperatur e recording systemturne d on , th e hea t sourc e shal l b e properl ypositione d wit hrespec t t o th e fue l tank(s ) and/o r connecte d t o th e temperatur e controller . Heating o f th e fue l shal l the nb e started . i (iii ) Whe n th e fue l temperatur e recording systemshow s tha t th e fue l ha s reache d 58.0° F (14.0°C ) fo r th e firs t hea t buil d o r 70.0° F (21.0°C ) fo r th e secon d hea t buil d immediatel yinstal l th e fue l tank cap(s ) an d reconnec tP.7 0

refueling emission s contro l canister(s) . Heating o f th e fue l shal l continu e an d b e controlle d s o tha t it s rat e o f temperatur e ris e conform s wit hth e equatio n specifie d i n paragraph-Xa)(12 ) o f thi s section . (iv ) A s soo n a s th e temperatur e recording system show s tha t th e temperatur e o f th e fue l ha s reache dP.7 1

84.0+2.0° F (28.9+1.9°C ) fo r th e firs t hea t buil d o r 96.0+2.0° F (35.6+1.0°C ) fo r th e secon d hea t build , heatin g o f th e fue l shal l b e stoppe d an d th e tes t vehicl e shal l procee d t o th e nex t step i nth e tes t sequenc e (i.e. , afte r th e firs t diurna l hea t build , t o th e vehicl e operatio n step , an

d afte r th e secon d diurna l hea t build , t o fue l draining i n preparatio nfo r th e diurna l breathin g los s test) . (4 ) Procedure s fo r Diurna l Breathing Los s Test : Th e diurna l breathing los s tes t shal l b e carrie d ou t according t o o f paragraph s (a)(3 ) through(a)(17 ) o f thi s section , excep t for th e following differences : (i ) Th e fue l tank draining an d refueling step s containe d i n paragraph(a)(6 ) shal l b e initiate d withi n1 0 minute s o f completio n o f th e second diurna l hea t build . (ii ) Durin g refueling , define d i nparagraph(a)(6) , th e temperatur e o f th e fue l prio r t o it s deliveryt o th e fue l tank(s ) shal l b e betwee n60. 0 an d 72.0° F (15. 6 an d 22.2°C) . (iii ) Th e step s define d i n paragraph(a)(10 ) shal l b eP.7 2

carrie d out.whe n th e temperatur e recording systemindicate s a fue l temperatur e o f a t leas t 70.0° F (14.0°C) . (iv ) .Th

e step s define d i n paragraph(a)(11 ) shal l b e carrie d ou t whe n the temperatur e recording systemindicate s a fue l temperatur e o f 72.0+2.0° F (16.0+1.1°C) .18 . Ane wSectio n 86.1238-X Xi s propose d t o b e adde d t o Subpar t M , t o read a s follows : §86.1238-X

XHot-soa k test . Th e hot-soa k evaporativ e emissio n tes t shal l b e conducte d immediatel yfollowing vehicl e operation . (a ) Prio r t o th e completio n o f vehicl e operation , th e evaporativ e emission s enclosur e shal l b e purge d fo r severa l minutes . (b ) Th e FI D hydrocarbo n analyze r shal l b e zeroe d an d spanne d immediatel yprio r t o th e test . (c ) I f no t alread yon , th e evaporativ e enclosur e mixing fan(s ) shal l b e turne d o n a t thi s time . (d ) Upo n completio n o f vehicl e operation , th eP.7 4

vehicl e engin e compartmen t cove r shal l b e closed , th e cooling fanshal l b e moved , th e vehicl e shal l b e disconnecte d fromth e dynamomete r an d exhaus t sampling system , an

d the n drive n a t minimu mthrottl e t o th e vehicl e entranc e o f th e enclosure . (e ) Th e vehicle' s engin e mus t b e stoppe d befor e any par t o f th e vehicl e enter s th e enclosure . Th e vehicl e ma y b e pushe d o r coaste d int o th e enclosure . (f ) Th e tes t vehicl e window s an d an ystorag e compartment s shal l b e opened , i f no t alread yopen . (g ) Th e temperatur e recording system shal l b e starte d an

d th e time o f engin e shu t of f shal l b e note d o n th e evaporativ e emissio n hydrocarbo n dat a recording system . (h ) Th e enclosur e door s shal l b e close d an d seale d withi n four minute s o f engin e shutdow n an d withi nte n minute s afte r th e en d o f vehicl e operation . (i ) Th e 60+0. 5 minut e ho t soak begin s whe n th e enclosur e door s ar e sealed . Th e enclosur e atmospher e shal l b e analyze d an

d recorde d a t thi s time . Thi s i s th e initia l (tim e = 0 minutes ) hydrocarbo nconcentration , C Hci ' require d i n§86.1243 .P.7 5

(j ) Utilizing th e acces s port(s ) i n th e sid e o f th e enclosure , th e fue l tan k caps(s ) shal l b e remove d fo r a perio d of . no t les s tha n 5 "second s no r longe r tha n 2 0 second s t o reliev e an ypressur e i nth e tank an d the nb e reinstalle d an

d tightened . Thi s operatio nshal l b e complete d withi n fiv e minute s o f engin e shutdown . (k ) Th e tes t vehicl e shal l b e permitte d t o soak fo r a perio d o f on e hou r (60.0+0. 5 minutes ) i nth e enclosure . (1 ) Th e FI D hydrocarbo n analyze r shal l b e zeroe d an d spanne d immediatel yprio r t o th e end o f th e test . (m ) Th e en

d o f th e hot-soa k evaporativ e tes t occur s 60.0+0. 5 minute s afte r th e enclosur e door s ar e sealed , a s specifie d i n paragrap h(i) . .Analyz e th e enclosur e atmospher e fo r hydrocarbon s an d record . Thi s i s th e fina l (time = 6 0 minutes ) hydrocarbo n concentration , c vrf require d i n §86.1243 . Th e elapse d time o f thi s tes t shal l b e recorded .