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# OAR Box 

# 1830 Prepped byOllie Stewart



### Document

Number: 

# 29 ) IV-B-2 5 Docket Number: 

# A-87-1 1

Printed 11/13/20087:20:52 AM Sheet 29of 232J** 0 8 * * .{•

\ UNITE D STATE S ENVIRONMENTA LPROTECTIO N AGENC Y* P.2

. 

# Km, I AN N ARBOR

. MICHIGA N 48105

JU N 1 7 199

3 OFFIC E O F AI R AN D RADIATIO N 

## JU N 

## | 8 199

3 MEMORANDU M
SUBJECT : Mode l Yea r Implementatio nfo r Onboar d

Refuelin g Vapo r Recover yRequiremen t . _ FROM : Glen nW . Passavant , Chie f ^)J^H^C^I c^4/^r<^^\ Specia l Regulator yProject s Branc h TO : Publi c Docke t A-87-1 1
Unde r sectio n202(a ) (6 ) o f th e Clea nAi r Ac t a s amende d i n 1990 , onboar d refuelin g vapo r recover ystandard s fo r light-dut y vehicle s tak e effec t "beginnin g wit hth e fourt hmode l yea r afte r th e mode l yea r i nwhic hth e standard s ar e promulgated. " I na recen t Federa l Registe r notic e (5 8 F R30731 , Ma y27 , 1993) , EP A reiterate d it s inten t t o exten d th e onboar d requiremen t t o light

dut ytruck s an d heavy-dut yvehicle s unde r th e authorit yprovide d i n sectio n202(a ) (1 ) . Thi s sam e notic e indicate d EPA' s inten t t o us e th e sam e leadtim e approac hfo r light-dut ytruck s an d heavy-dut y vehicle s a s tha t lai d ou t i nth e Clea nAi r Ac t fo r light-dut y vehicles . O nJun e 2 , 1993 , EP Aentere d int o a propose d settlemen t agreemen t whereb yEP Aha s agree d t o promulgat e th e standard s require d bysectio n202(a)(6 ) byJanuar y22 , 1994 . I t i s EPA' s vie wtha t a requiremen t promulgate d o ntha t dat e woul d b e deeme d t o hav e bee npromulgate d i nth e 199 4 mode l year , sinc e i nJanuar yo f 199 4 manufacturer s wil l b e producin g primaril yo r exclusively , 199 4 mode l yea r vehicles . Henc e th e onboar d requiremen t woul d begi nt o b e phase d i nwit h199 8 mode l yea r vehicles . Although , unde r sectio n202(b ) (3 ) (A ) (i ) an d EPA' s mode l yea r regulation s (4 0 CF R86.082-2 ) i t i s possibl e fo r 199 5 mode l yea r certificatio nfo r a particula r vehicle/engin e famil yt o b e effectiv e a s earl ya s Januar y2 , 1994 , histor ywoul d indicat e tha t few , i f any , 199 5 mode l yea r vehicle s ar e likel yt o b e certifie d o r produce d a s earl ya s January , 1994 . Th e earl ycertificatio n optio n i s designe d t o provid e manufacturer s margina l flexibilit yfo r th e timin g o f ne wmode l introductions . I t wa s no t intende d no r ha s i t eve r bee nuse d a s a broa d licens e fo r acceleratin g o r redefinin g mode l yea r fo r certificatio no r productio npurposes . EP Adoe s no t believ e tha t thi s optio ndetract s fro mth e conclusio ntha t a n onboar d requiremen t promulgate d i nJanuar y199 4 woul d b e promulgate d i nmode l yea r 1994 , a s productio no f n o mor e tha na n insignifican t numbe r o f mode l yea r 199 5 vehicle s woul d no tP. 3



### hav e occurre d b

ytha t time . I naddition , sectio n202(a)(6 ) treat s th e onboar d standar d a s bein g promulgate d i na particula r mode l yea r fo r al l vehicle s covere d b yth e requirement . I t i s unreasonabl e tha t th e mode l yea r fo r al l vehicle s b e an ytime befor e productio no f essentiall yal l o f thos e vehicles . Consequently , i t i s EPA' s vie wtha t anonboar d requiremen t promulgate d during January199 4 woul d b e promulgate d i nth e 199 4 mode l year , an

d henc e tha t th e 199 8 mode l yea r wil l b e th e "fourt h mode l yea r afte r th e mode l yea r i n whic hth e standard s ar e promulgated. " EP Asolicit s commen t onthi s matte r a s par t o f th e reopene d commen t perio d i nthi s proceeding .