YEARSOURCEIDSOURCENAMEFACILITYIDAPCD DBASTREET_NUMBERSTREET_NAMESTATE_NAMECITYZIPPOLLUTANTLBS/YRTPY20047263OTAYLANDFILL88176AOTAYLANDFILLINC1700MAXWELLRDCACHULAVISTA91910NOx41,312ÓðÚÈ20047263OTAYLANDFILL88176AOTAYLANDFILLINC1700MAXWELLRDCACHULAVISTA91910PM10374,918ÔËÈÚÎ20048719SYCAMORE6257CSYCAMORELANDFILLINC8514MAST BLCASANDIEGO92145NOx18,992ÁÚÎ20048719SYCAMORE6257CSYCAMORELANDFILLINC8514MAST BLCASANDIEGO92145PM10836,961ÏÔËÚÎ200545HANSON255AHANSONAGGREGATES PACIFIC7TH&MAIN STSCACHULAVISTA91911PM1033,668ÔÍÚË2005282HANSON282AHANSONAGGREGATES PACIFIC550TULIP NCAESCONDIDO92025PM1018,152ÁÚÔ2006128SUPERIOR128ASUPERIORREADYMIXCONCRETE1508MISSIONRDWCAESCONDIDO92029PM1020,077ÔðÚð20065161HAMILTON5161AHAMILTON SUNDSTRANDPOWER4400RUFFINRDCASANDIEGO92123NOx25,156ÔÓÚÍ20065867HANSON2558AHANSONAGGREGATES PACIFIC5330OTAYVALLEYRDCACHULAVISTA91911PM1094,221ÏÈÚÔ20067050MANSON87161AMANSONCONSTRUCTION&PORTABLECASANDIEGO92000NOx27,653ÔÌÚË200777HANSON180AHANSONAGGREGATES PACIFIC9229HARRIS PLANTRDCASANDIEGO92145PM1020,723ÔðÚÏ200794USN NORTH4821AUSNAIRSTATION NORISNAS NORTHISLANDCASANDIEGO92135NOx18,200ÁÚÔ200794USN NORTH98395AUSN SUPSHIPS3600SURFACENAVYBLCASANDIEGO92136NOx16,150ËÚÔ2007138HANSON138AHANSONAGGREGATES PACIFIC9255CAMINO SANTAFECASANDIEGO92121PM1031,078ÔÎÚÎ2007221USMCBASE/98193AUSMCBASEMILITARY SCHOOLSCAMP PENDLETONCACAMP92055NOx12,361ÍÚÓ2007221USMCBASE/98263AUSMCBASEUNPERMITTEDCAMP PENDLETONCACAMP92055NOx23,213ÔÔÚÍ20077270HANSON88183AHANSONAGGREGATES PACIFIC720TWIN OAKSVALLEYRDCASANMARCOS92069PM1043,346ÓÔÚÈ20079165HANSON9165AHANSONAGGREGATES PACIFIC8514MAST BLCASANTEE92071PM1058,810ÓÁÚÏ200710705CA10705ACALIFORNIACOMMERCIAL9229HARRIS PLANTRDCASANDIEGO92145PM1024,809ÔÓÚÏ200794343AGRISERVICE94343AAGRISERVICE3210OCEANSIDE BLCAOCEANSIDE92057PM1010,933ÎÚÎ200796429JCLOUDINC96429AJCLOUDINC2094WILLOWGLENDRCAELCAJON92019PM1012,836ÍÚÏ20085985ENCINAWASTE5985AENCINAWASTEWATERAUTHORITY6200AVENIDAENCINASCACARLSBAD92009NOx13,893ÍÚÁ200819NATIONAL253ANATLSTEEL&SHIPBUILDINGA2798HARBORDRIVECASANDIEGO92113NOx25,833ÔÓÚÁ200819NATIONAL253ANATLSTEEL&SHIPBUILDINGA2798HARBORDRIVECASANDIEGO92113PM1046,319ÓÌÚÓ200868HANSON396AHANSONAGGREGATES PACIFIC12533HY67CALAKESIDE92040PM1037,129ÔËÚÍ2008251PACIFICGAS1034APACIFICGASTURBINECENTERINC7007CONSOLIDATEDWYCASANDIEGO92121NOx25,794ÔÓÚÁ2008556HANSON556AHANSONAGGREGATES PACIFIC2266WILLOWGLENDRCAELCAJON92019PM1010,036ÎÚð20081969SOUTHERN1969ASOUTHERNCALIFORNIAEDISONHY101NUCLEARGENCASAN ONOFRE92672NOx54,449ÓÈÚÓ20082631KYOCERA2631BKYOCERAAMERICAINC8611BALBOAAVCASANDIEGO92123NOx33,865ÔÍÚÁ20084346CWMCGRATH4346ACWMCGRATHINC1720JAMACHARDCAELCAJON92019PM1011,765ÎÚÁ20084845USN32NDST98395AUSN SUPSHIPS3600SURFACENAVYBLCASANDIEGO92136NOx12,858ÍÚÏ20085924GASRECOVERY-5924BGASRECOVERYSYSTEMINC1615SAN ELIJORDCASANMARCOS92069NOx32,232ÔÍÚÔ20086257GASRECOVERY-6257AGASRECOVERYSYSTEMSINC8514MAST BLCASANTEE92071NOx40,798ÓðÚÏ20087630LARKSPUR7630ALARKSPURENERGYFACILITY9355OTAYMESARDCASANDIEGO92154PM1014,089ÈÚð200973CABRILLO333ACABRILLO POWERILLCENCINA4600CARLSBADBLCACARLSBAD92008NOx109,233ÎÏÚÍ200973CABRILLO333ACABRILLO POWERILLCENCINA4600CARLSBADBLCACARLSBAD92008PM1095,187ÏÈÚÍ2009171GROSSMONT171AGROSSMONTDISTRICTHOSPITAL5555GROSSMONTCENTERCALAMESA91942NOx78,277ÌÁÚÔ2009351S.D.STATE351ASDSTATEUNIVERSITY5500CAMPANILEDRCASANDIEGO92182NOx50,891ÓÎÚÏ20091795SOLAR1869ASOLARTURBINESINC4200RUFFINRDCASANDIEGO92123NOx188,865ÁÏÚÏ20091795SOLAR1869ASOLARTURBINESINC4200RUFFINRDCASANDIEGO92123PM1015,025ÈÚÎ⁄ø1⁄2·¥· ̈ß©·oa¤flÕ×¤Œ“—®–”Ôðø2o‘±1⁄2ø ̈·±2ÔÓðÁÔðÚ®¥­®–ø1aÔ±o ÓÍÒÁÒÓðÔÔYEARSOURCEIDSOURCENAMEFACILITYIDAPCD DBASTREET_NUMBERSTREET_NAMESTATE_NAMECITYZIPPOLLUTANTLBS/YRTPY20093680S.D.CITYPT.3680ASDCITY OFPTLOMA1902GATCHELLRDCASANDIEGO92106NOx90,358ÏÎÚÓ20093680S.D.CITYPT.3680ASDCITY OFPTLOMA1902GATCHELLRDCASANDIEGO92106PM1022,428ÔÔÚÓ20095640QUALCOMM,5640AQUALCOMMINC5555MOREHOUSEDRCASANDIEGO92121NOx53,009ÓÍÚÎ200996224MINNESOTA96224AMINNESOTAMETHANE SANDIEGO4949EASTGATEMALLCASANDIEGO92121NOx50,618ÓÎÚÌ200996224MINNESOTA96224AMINNESOTAMETHANE SANDIEGO4949EASTGATEMALLCASANDIEGO92121PM1017,077ËÚÎ200996387MINNESOTA96387AMINNESOTAMETHANE SANDIEGO5244CONVOY STCASANDIEGO92111NOx84,497ÏÓÚÓ200996387MINNESOTA96387AMINNESOTAMETHANE SANDIEGO5244CONVOY STCASANDIEGO92111PM1029,748ÔÏÚÁ200927CANYONROCK-103ACANYONROCK7500MISSION GORGERDCASANDIEGO92120PM1071,732ÌÎÚÁ200956VULCAN-89125AVULCANMATERIALS COWESTERN5745MISSION CENTERRDCASANDIEGO92108PM1088,606ÏÏÚÌ200972DYNEGY SOUTH334ADYNEGY SOUTHBAYLLC990BAY BLCACHULAVISTA91911NOx71,493ÌÎÚÈ200972DYNEGY SOUTH334ADYNEGY SOUTHBAYLLC990BAY BLCACHULAVISTA91911PM1073,515ÌÍÚË2009118CPKELCO203ACPKELCOUSINC2025HARBORDRECASANDIEGO92113NOx77,600ÌËÚË2009118CPKELCO203ACPKELCOUSINC2025HARBORDRECASANDIEGO92113PM1012,750ÍÚÏ2009149APPLIED15AAPPLIEDENERGYLLCMCRDMCRDBLD566ENDOFCASANDIEGO92133NOx80,755ÏðÚÏ2009149APPLIED15AAPPLIEDENERGYLLCMCRDMCRDBLD566ENDOFCASANDIEGO92133PM1025,650ÔÓÚË2009167SOLAR368ASOLARTURBINESINC2200PACIFICHYCASANDIEGO92101NOx33,159ÔÍÚÍ2009290RCPBLOCK&290ARCPBLOCK&BRICKINC9631MAGNOLIAAVNCASANTEE92071PM1011,663ÎÚË2009415APPLIED415AAPPLIEDENERGYLLCNAVAL3970SURFACENAVYBLCASANDIEGO92136NOx112,419ÎÍÚÓ2009415APPLIED415AAPPLIEDENERGYLLCNAVAL3970SURFACENAVYBLCASANDIEGO92136PM1044,506ÓÓÚÌ2009478BAE SYSTEMS344ABAE SYSTEMSSANDIEGO SHIPFOOT OF SAMPSON STCASANDIEGO92113NOx14,607ÈÚÌ2009517UCSDCAMPUS402AUCSD9500GILMANDRDEPT0089CASANDIEGO92093NOx18,738ÁÚÏ2009517UCSDCAMPUS402AUCSD9500GILMANDRDEPT0089CASANDIEGO92093PM1019,504ÁÚË20091976UNION-1976ASANDIEGOUNION TRIBUNELLC350CAMINODELAREINACASANDIEGO92108NOx15,977ËÚð20094824USMCAIR4824AUSMCMCASMIRAMARUSMCMIRAMARCASANDIEGO92145NOx175,379ËÈÚÈ20094824USMCAIR4824AUSMCMCASMIRAMARUSMCMIRAMARCASANDIEGO92145PM1010,561ÎÚÌ20094824USMCAIR4824DUSMCMCASMIRAMAR3RDMAW45249MIRAMARWY BLDGCASANDIEGO92145NOx42,424ÓÔÚÓ20094835USNHOSPITAL4835AUSNHOSPITAL2PWCNAVYHOSPITALCASANDIEGO92134NOx21,328ÔðÚÈ20095270APPLIED54AAPPLIEDENERGYLLCNORTHQUAY&ROGERSRDCASANDIEGO92135NOx44,090ÓÓÚð20095270APPLIED54AAPPLIEDENERGYLLCNORTHQUAY&ROGERSRDCASANDIEGO92135PM1030,948ÔÎÚÎ20096068PACIFIC6068APACIFICRECOVERYCORPOTAYLANDFILLCACHULAVISTA91911NOx89,171ÏÏÚÍ20096068PACIFIC6068APACIFICRECOVERYCORPOTAYLANDFILLCACHULAVISTA91911PM1031,056ÔÎÚÎ20096306VULCAN6306AVULCANMATERIALSWESTERN10051BLACKMOUNTAINRDCASANDIEGO92126PM1054,235ÓÈÚÔ20098013SDG&E8013ASDG&E PALOMARENERGYCENTER2300HARVESON PLCAESCONDIDO92029NOx190,822ÁÎÚÏ20098013SDG&E8013ASDG&E PALOMARENERGYCENTER2300HARVESON PLCAESCONDIDO92029PM1075,246ÌÈÚÍ20098469GOALLINELP-92022AGOALLINELP555TULIP ST NCAESCONDIDO92025NOx37,856ÔËÚÁ20098469GOALLINELP-92022AGOALLINELP555TULIP ST NCAESCONDIDO92025PM1051,956ÓÍÚð20098717S.D.COUNTY-5924CSDCOOF PUBWKS SANMARCOSSANMARCOSLANDFILLCASANMARCOS92069NOx19,143ÁÚÍ200986072S.D.CITY-86072ASDCITY OFSO CHOLLASLANDFILL2781CAMINITOCHOLLASCASANDIEGO92105NOx12,552ÍÚÌ200988196S.D.CITY-88196CSDCITY OFMIRAMARLANDFILL5180CONVOY STCASANDIEGO92111PM10164,444ËÓÚÓ200989296S.D.METRO89296ASDMETRO PUMPING STATION#24077HARBORDRNCASANDIEGO92106NOx27,262ÔÌÚÍ⁄ø1⁄2·¥· ̈ß©·oa¤flÕ×¤Œ“—®–”Ôðø2o‘±1⁄2ø ̈·±2ÔÓðÁÔðÚ®¥­®–ø1aÓ±o ÓÍÒÁÒÓðÔÔJu l y 6, 2011

C ar o l B ohn e nk a m

p

U

. S . E P A

, R e g i on 9

75 H a w t ho r

n e S t re e t

S a n F ra n c i s c o, C A 94105

D e ar Ms. B ohn e nk a m

p :

I n ou r c onv e r s a ti ons r e g a r d i n g m od e li ng f o r t h e P S D p e r m it a

pp li c a ti on f

o r t h e P i o P i c o

En e r gy C e n t e r ( P P E C ) , you r e qu e s t e d c l ar i f i c a ti on o f ou r p r opo s a l f

o r c h ar a c t e r i z i ng t h e

c o m b i n e d i m p a c t o f t h e P P E C a nd e x i s t i n g sou r c e s. Th a t c l ar i f i c a ti on i s p r ov i d e d b e l o w.



### N ear by S o u rc e s

N on

- P r o j ec t S ou r c e s I n c l ud e d i n C u m u l a t i v e I m

p a c t Mod e li ng

Th e b a s i s f

o r s e l ec ti ng non

- p r o

j e c t s o u rc e s t o i n c l ud e i n t h e c u m u l a ti v e im p a c t m od e li ng

w a s d e s c r i b e d i n d e t a i l i n PP E C ’ s A p r il 1, 2011 PS D p e r m it a pp li c a ti on. W e us e d t h e

r e su l t s o f p r e li mi n a r

y ( p r o j ec t on l y ) m od e li ng o f

p r o j e c t e m i ss i ons, b a s e d on S a n D i e go

m e t e o r o l ogy, t o d e v e l op a n e m i s s i on

- t o

- d i s t a n c e r a t i o t o e s tim a t e t h e f a r t h e s t e x t e n t a t

w h i c h a sou rc e m i gh t b e e xp e c t e d t o h a v e i m p a c t s a bov e t h e P S D S i gn i f

i c a n t I m p ac t

L e v e l s ( S I Ls )

. W e d i d no t us e t h i s l e v e l a s a “ b r i g h t li n e ” t o e li m i n a t e non

- p r o j e c t

sou r c e s fr o m c ons i d e ra ti on. R a t h e r

, w e us e d t h i s ra ti o t o s e p a ra t e non

- p r o j e c t sou r c e s i n t o

t h r e e g r oups : t hos e t h a t c l e a r l y c ou l d b e e x c l ud e d, t hos e t h a t c l e a r l y sho u l d b e i n c l ud e d,

a n d t h os e w h er e a dd it i on a l j udg m e n t w a s re qu i r e d. We d i s c uss e d t h e b a s i s f o r i n c l ud i n g

o r e x c l ud i ng sou rc e s fr o m t h e t h i r d g r ou p i n t h e A p r il 1 P S D a pp l i c a ti on.

A f t e r a pp l y i ng t h e p r o c e du re ou tli n e d a bov e t o t h e li s t o f f a c ili t i e s p r ov i d e d by t h e

D i s t r i c t

, P P E C p r opos e d t o i n c l ud e t h e f o ll o w i ng non

- p r o

j ec t sou r c e s i n t h e c u m

u l a t i v e

i m p a c t m od e li ng :

NO x e mi ss i ons f

r o m L ar kspu r En e r gy F a c i lit y ( a s m a ll p e a k i ng p l a n t l o c a t e d

2.5 k m w e s t o f t h e p r o

j e c t s it e) ;

N O x e m i ss i ons f

r o m P a c i f i c R e c ov er

y C o r p ( l a n d f ill g a s w a s t e- t o

- e n e r g y f

a c ilit y

9.2 k m w e s t o f t h e p r o

j e c t s it e ) ; a nd

NO x a nd PM 2 .5 e m i ss i ons f r o m O t a y M e s a G e n e r a ti ng C o m p a ny ( a po w e r

p l a n t

l o c a t e d a d j a c e n t t o t h e p r o

j e c t s it e )

. 

## s i e r ra

r e s e ar ch

1801 J S t r ee t

S a c ra m en t o

, C A 95811

T e l : (91 6 ) 4 4 4

- 6666

F a x: (91 6 ) 444

- 8373

A nn A rbo r

, M I

T e l : (73 4 ) 7 6 1

- 6666

F a x: (73 4 ) 761

- 6755C ar o l B ohn e nk a m p

- 2

- Ju l y 6, 2011

N on

- P r o j e c t S ou r c e s N o t I n c l ud e d i n C u m u l a ti v e I m

p ac t Mod e l i ng

D u r i ng ou r d i s c uss i ons, you r e qu e s t e d a dd iti on a l i n f o r m a t i o n r e g a r d i ng t h e f

o ll o w i ng

f a c ilit i e s t h a t w e h a d no t p r opos e d t o i n c l ud e i n t h e c u m u l a ti v e i m

p a c t m od e li ng a n a l ys i s :

H a nson A gg r e g a t e s ( O t a y V a l l e y R o a d ) a nd O t a y L a nd f il l ; D y n e gy S ou t h B a y ; S o l ar

Tu r b i n e s ; a nd M a nson C ons t r u c ti on a nd Eng i n e er i ng. Th e r e qu e s t e d i n f o r m a ti on i s

p r ov i d e d b e l o w

.

H a nson A gg r e g a t e s ( O t a y V a ll e y R o a d ) a nd O t a y L a nd f i ll

– Y ou r e qu e s t e d c l a r i f

i c a ti on

o f ou r e s ti m a ti on o f PM 2 .5 e m i ss i ons f r o m t h e s e sou r c e s ( b a s e d o n t h e PM 10 e m i ss i ons

p r ov i d e d by t

h e D i s t r i c t ).

Th e D i s t r i c t p r ov i d e d PM 10 e m i ss i on i nv e n t o r y d a t a f o r a ll s ou r c e s i n t h e D i s t r i c t w i t h

PM 10 e m i ss i ons g r e a t e r t h a n 5 T P Y

. Th e D i s t r i c t d i d no t p r ov i d e PM 2

. 5 e m i ss i ons.

W h er e P M e m i ss i ons ar e f r o m c o m b us t i o n, w e a ssu m e d t h a t a l l o f t h e e m i ss i ons w e re

PM 2 .5

. F o r H a nson A gg re g a t e s a nd O t a y L a nd f ill , ho w e v e r

, t h e PM 10 e mi ss i ons a r e

f ug iti v e du s t e m i ss i ons— e a r t h m ov i ng, m a t e r i a l h a nd l i ng, a nd v e h i c l e t ra f f i c on d i r t

r o a ds.

W e e s ti m a t e d t h e PM 2 .5 e m i ss i o n s fr o m t h e f ug iti v e dus t sou r c e s a t t h e s e f a c iliti e s u s i ng a

PM 2

. 5/ PM 10 fr a c ti on o f

20 % a nd t h e PM 10 e m i ss i ons p r ov i d e d by t h e D i s t r i c t. 1 Th i s

f r ac ti on w a s b a s e d on t h e C E C ’ s t r e a t m e n t o f PM 10 o f

f s e t s fr o m r o a d p a v i ng p r o j e c t s

( e .g., t h e C E C e s ti m a t e d t h a t t h e PM 2 .5 fr a c ti on o f f ug iti v e dus t r e du c ti ons a t t h e

A lt a m o n t L a nd f

ill w ou l d b e 15 % o f t h e PM 10 r e du c ti ons ). 2

F o r c o m p a r i son, t h e f

o l l o w i ng t a b l e sho w s A P

- 42 f a c t o r s f o r v ar i ous dus t

- g e n er a t i ng

a c ti v iti e s s im il a r t o t ho s e f ou n d a t l a n d f

ill s a nd a gg r e g a t e p l a n t s ; t h e y ra ng e f r o m 5 : 1 t o

15 : 1.

A P

- 42 Fa c t o r s

V e h i c l e t r a ff

i c

— d i r t r oa d s

A P

- 42 S ec ti on C a t e go r y PM 10 f

a c t o r PM 2 .5 f

a c t o r R a t i o

11.19.2 T e r ti a ry

C r ush i ng

( c on t r o ll e d ) 0.00027 kg / Mg 0.00005 kg / Mg 0.19

11.19.2 S c r ee n i ng

( c on t r o ll e d ) 0.00037 kg / Mg 0.000025 kg / M g 0.07

11.19.2 T r

u c k Lo a d i ng

( c on t r o ll e d ) 5.0E

- 05 kg / Mg ND

--

13.2.2 V e h i c l e T r af f i c

( U np a v e d R o a ds) k

= 1.5 l b / V MT K

= 0.15 l b / V MT 0.10

1 P lea s e no te t

h at t h e r ati o s h o w n i n t h e s e v e n t h c o l u m n o f Ta b le 7 -1 of t h e P SD a

p p li c ati o n r e f lect s t h e

P M 1 0 e m i s s i on t o d i s ta n ce r ati o, a n d n o t t h e P M 2 .5 t o d i s t a n ce r ati o a s i n d i cate d i n t h e c o l u m n h ea d e r.

T h e a d j u s t m e n t i n t h i s calc u lati o n f o r P M 2. 5 fr acti on w a s d e s c r i b e d o n P a g e 2 3 of t h e PSD a p p li c ati o n.

2 C E C S ta f

f, F i n al S ta f

f As s e s s m e n t

, Te s la P o w e r P r o j e ct

, A p r il 200 3

. A i r Q u al i t y Ta b le 19

, p

. 4. 1 -40C ar o l B ohn e nk a m p

- 3

- Ju l y 6, 2011

Th e 20 % f

r ac ti on t h a t w e us e d t o e s t i m a t e PM 2 .5 e m i ss i ons f r o m r e po r t e d f

ug iti v e PM 10

e m i ss i ons i s t h e r ef

o r e a t t h e c ons e r

v a ti v e e nd o f t h e r a ng e o f pub l i sh e d e m i ss i on fa c t o r s.

D yn e gy S ou t h B a y – Y ou r e qu e s t e d do c u m e n t a ti on c on f i r m i ng t h a t t h e fa c i l it y h a s b e e n

p e r m a n e n t l y c l o s e d. Th e re qu e s t e d do c u m e n t a ti on i s p r ov i d e d i n A t t a c h m e n t 1.

S o l a r Tu r b i n e s – Y ou a s k e d f

o r a m a p sho w i ng t h e l o c a t i o n o f t h i s fa c il i t y. P l e a s e s e e

F i g u re 7

- 2 o f t h e PS D a

pp li c a t i o n. T h e S o l a r Tu r b i n e s t e s t fa c i l it y ( S it e 45 ) i s n e a r t h e

S a n D i e go a i r

po r t , n e ar t h e v e r t i c a l c e n t er on t h e f ar l e f t o f t h e f i gu r e

.

M a nson C ons t r

u c ti on a n d Eng i n e e r i ng – Y ou r e qu e s t e d do c u m e n t a ti on c o n f i r m i ng t h a t

t h e r e po r t e d e m i s s i ons a re f o r non

- s t a t i on a r

y sou r c e s, l o c a t e d t h r oughou t t h e D i s t r i c t.

Th e t a b l e o f s t a t i o n ar

y sou r c e s a nd t h e i r e m i ss i ons t h a t w a s p r ov i d e d by t h e D i s t r i c t i s

p r e s e n t e d i n A tt a c h m e n t

2. M a nson i s t h e 10 th f

a c ili t y on p a g e 1, a nd t

h e s t re e t n a m e f

o r

t h e e qu i p m e n t i s li s t e d a s “ P O R T A B L E

, ” i nd i c a ti ng t h a t t h e e m i ss i ons a r e a s so c i a t e d

w it h po r t a b l e e qu i p m e n t

.



### S o u r ce o f A m b i e n t B ac k g r ou n d D a t a

Y ou i nd i c a t e d t h a t R e g i on 9 w a s c ons i d er i ng w h e t h er t o r e c o m m e n d us e o f a m b i e n t

m on it o r i ng d a t a f

r o m t h e O t a y M e s a B o r d e r C r oss i ng t o c h ar a c t e r i z e r e g i on a l

b a c kg r ound c on c e n t

r a ti ons f o r t h i s d e m ons t ra ti on. Th e re i s no t e c hn i c a l b a s i s f o r

c o n s i d e r i ng t h e O t a y M e s a m on it o r i ng d a t a t o b e r e p r e s e n t a ti v e o f r e g i on a l po ll u ti on

l e v e l s. T h e m on it o r i s c l e a r l y i m p a c t e d by t h e h e a vy t r a ff

i c

— c o m p r i s e d i n s i gn i f

i c a n t

p a r t by M e x i c a n v e h i c l e s no t sub j e c t t o C a li f

o r n i a ’ s e m i ss i on s t a nd a r d s— t h a t i d l e s a t t h e

bo r d e r w a i t i ng f

o r p e r m i ss i on t o c r oss. Th i s t r a ff i c i s l o ca t e d w i t

h i n a f e w hund r e d fe e t

o f t h e m on it o r i ng s t a t i on. B ec a us e o f t h e s e i m p a c t s, t h e m on i t o r i ng d a t a c a nno t b e

c ons i d e re d t o b e re p r e s e n t a t i v e o f r e g i on a l c on c e n t ra ti ons.

Th e C hu l a V i s t a m on i t o r i ng s it e i s on l y 9 k m a w a y fr o m PP E C

, w i t h n o i n t e r v e n i ng

g e o l og i c a l fe a t u re s t h a t w ou l d af f ec t t h e r e g i on a l d i sp er s i on o f po ll u t a n t s. D a t a f

r o m t h i s

s t a ti on r e p re s e n t re g i on a l b a c kg r ound p l u s d i r e c t i m p a c t s fr o m sou r c e s c l os e t o i t

. Mon it o re d v a l u e s f

r o m t h i s s it e m u s t b e a t l e a s t a s h i gh a s t h e r e g i on a l b a c kg r ound ( by

d e f i n i t i on, it i s i m

poss i b l e f o r v a li d m on it o r i ng d a t a t o b e b e l o w t h e re g i on a l

b a c kg r ound )

, a nd m a y b e h i gh e r t h a n t h e b ac kg r ound by v i r t u e o f l o c a l i m

p ac t s. We

p r opos e t o us e t

h i s s t a ti on ’ s d a t a t o r e p r e s e n t r e g i on a l b a c kg r ound d a t a

, a nd t o e xp l i c i t l y

sup e r i m pos e t h e i m

p a c t s o f s i g n i f i c a n t n ea rby non

- p r o

j ec t sou r c e s. We do no t p r opos e t o

a d j us t m on it o r i ng d a t a t o a c c oun t f o r d i rec t i m

p a c t s fr o m t ho s e

, e v e n t hough E P A

gu i d a n ce p e r

m it s su c h a n a d

j us t m e n t

.

O u r p r opos e d m e t ho d o l ogy w ill t h e r e f o r e c o m p a re t h e n a ti on a l a m

b i e n t a i r q u a lit y

s t a nd a r d t o t h e su m

o f r e g i on a l b a c kg r ound, d i r e c t i m p a c t s t o t h e m on it o r i n g s i t e

,

m od e l e d i m

p a c t s f r o m ou r p r o j e c t

, a nd m od e l e d i m

p a c t s fr o m n e a rby non

- p r o j e c t

sou r c e s. S i n c e t h e d i f

f e r e n c e b e t w ee n t

h e C hu l a V i s t a

d a t a a nd t h e O t a y M e s a

d a t a i s t h e

d e g re e t o w h i c h t h e y a r e i m p a c t e d by l o c a l s ou r c e s, a nd no t t h e r e g i on a l b ac kg r ound, us eC ar o l B ohn e nk a m p

- 4

- Ju l y 6, 2011

o f t h e m o r e h e a v il y i m

p a c t e d O t a y M e s a d a t a w ou l d no t b e c ons i s t e n t w i t h E P A

gu i d a n c e.



### C on c l us i on

B e c a us e t h e c o m

p l i a n c e d e m o n s t

r a ti on i s i n t h e c r iti c a l p a t h f o r t h e P S D p e r mi t r e v i e w

,

w e re qu e s t e xp e d iti ou s a pp r ov a l o f ou r p r op o s e d m od e l i ng d e m ons t ra ti on.

P l e a s e do no t

h e s i t a t e t o c on t ac t m e i f

you h a v e a ny qu e s ti ons.

S i n c er e l y,

S t e v e H ill

c c : S t e v e Moo r e

, S DA P C D

E r i c S o l o r i o, C E C

D a v e J e nk i ns, A p e x P o w e r

John M c K i ns e y, S t o e l Ri v e s

### A t t a c h m e n t 1

D y n e gy S o u t h B ay

### A t t a c h m e n t 2

S DA Q M D E mi s s i on I n v e n t o r y

Fac i l i t i e s w i t h N O x o r P M1 0 E m i s s i n s > 5 T P Y