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# OAR Box 

# 1784 Prepped byOllie Stewart



### Document

Number: 

# 45 ) ll-B-4 Docket Number: 

# A-84-4 4

Printed 10/31/2008 8:05:40 AM Sheet 45of 143P. 2 

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^_UK^T|a v STATE S ENVIRONMENTALfROTEOTJON^EM ^ 

# 4-84- 4 +

01 FE B 

### 198 5

MEMORANDU M SUBJECT : Tri p Repor t - Shel l Oi l Company , Norco , Louisian a (ESE D #83/03 ) FROM : Nanc yD . McLaughlin , Environmenta l Enginee r

Standard s Documentatio n Section , ISB , ESE D (MD-13 ) TO : I
. PURPOS

E Kennet h R
. Durkee , Chie f Standard s Documentatio n Section , ISB , ESED (MD-13 )
Th e purpos e o fthi s visi twa s t o becom e familia rwit h th e operatio n o f amin e treater s an d t o discus s Shel l Oil' s experienc e wit h th e refiner y fue l ga s np

wsourc e performanc e standar d (NSPS)
. I I
. TIM E AN

D PLACE : 1:0 0 t o 4:3 0 Novembe r 27 , 198 4 Shel l Oi l Company Norco , Louisian a III . ATTENDEES : U.S . Environmenta l Protectio n Agenc y Nanc yD . McLaughli n Charle s B . Sedma n Debbi e K . Well s Shel l Oi l Company Willia mL . Caughma n Denni s V . Knudso n Ji mPfaf f Jame s Fo x FreddyBabineau x Bil l Gree n Larr yScherinsk i Environmenta l Enginee r Environmenta l Enginee r Environmenta l Protectio n Specialis t
Manager , Environmenta l Conservatio n Sr. Engineer , Environmenta l Conservatio n Proces s contro l and instrumentatio n Technica l suppor t Facilitie s operation s Sulfu r plan t Continuou s monitorin g instrument s CONCURRENCE S SYMBO L \ SURNAM E \ DAT E \ £?><>/1 $6 

### 'Tf! ^4*M*L 

# 2v?Bf EP AFor m 1320- 1 (l'2-70 ) OFFICIA L FIL E COP Y GP O : 198 3 O - 403-20 1P. 3

IV . DISCUSSION : Schedul e o f Activitie s Charli e Sedman , Debbi e Wells , an d I arrive d a t th e refiner yabou t 1:3 0 p.m . W e firs t met-wit ha group o f refiner ypersonne l fo r abou t 2 hour s t o discus s th e operation , reliability , and performanc e o f thei r newe r amin e treate r an d thei r experience s wit hth e refiner yfue l ga s NSPS . W e the n observe d th e amin e treatin g and sulfu r recover yarea s o f th e refinery , includin g th e operato r contro l roo mfo r thos e areas . W e lef t th e refiner yaroun d 4:3 0 p.m . Genera l Refiner yInformatio n and Backgroun d Shell' s refiner yi n Norco , Louisiana , i s an older , large , fully-integrate d refinery . Th e refinery.wa s starte d i n 192 0 and ove r th e year s ha s undergon e a n'.tmbe r of . expansion s and modifications . Th e nomina l siz e o f th e refiner y i s 220,00 0 barrel s o f crud e pe r day . Th e refiner ygenerall yuse s lowe r sulfu r "sweet " crud e wit han averag e sulfu r conten t o f abou t 0. 2 percent . Aroun d 1980 , Shel l expande d b yconstructin g a ne wethylen e plant . Becaus e manyne wconthustio n device s wer e par t o f thi s expansion , Shel l als o ha d t o construc t a ne wamin e treatin g uni t and sulfu r plan t i n orde r t o compl ywit hth e NSP S fo r refiner yfue l gas . Shel l designe d th e ne wamin e treatin g uni t specificall yt o trea t th e amoun t o f flo wo f sou r fue l ga s tha t woul d h e directe d t o al l ne wcombustio n sources . Th e amin e treate r wa s als o designe d t o contro l th e hydroge n sulfid e (H2S ) safel ybelo wth e NSP S leve l o f 16 Uppmv . Amin e Treatin g Uni t Sh<=>l l provide d u s wit hschemati c diagram s o f th e fue l gas/amin e treatin g syste mend o f th o fue l ga s treate r wit hproces s instrumentation , (se e attache d figure s 1 end 2) . Th e ne wamin e treatin g syste mwa s installe d i n 198 0 becaus e o f th e ne wproces s heater s tha t wer e i n th e ne wethylen e plant . Shel l woul d no t hav e adde d a ne wamin e treatin g uni t i n th e absence o f th e NSPS . The yd o .no t fee l tha t th e corrosio n problem s cause d b yN2 S i n fue l ga s ar e significan t enoug ht o warran t control . Also , th e valu e o f th e sulfu r recovere d doe s no t payfo r th e cos t o f runnin g th e sulfu r recover ysyste m(amin e treater , Clau s plant , and tai l ga s treater) . In contrast , i n 196 5 Shel l ha d installe d an amin e treating/sulfu r recover yuni t becaus e o f th e valu e o f th e sulfur . However , Mr . Caughma n note d tha t th e cos t o f th e olde r syste mha s no wmor e tha n double d du e t o th e requiremen t fo r a tail-ga s treater . Th e curren t sulfu r recover yschem e include s tw o Clau s sulfu r plant s and tai l ga s treater s rate d a t 4 0 LT/ D (1965 ) and 12 5 LT/ D (1982) .P. 4

Th e newamin e treating systemuse s diethanolamin e (DEA) . Th e fue l ga s treate r wa s designe d b yShel l an

d constructe d b

yStandard Tool . (The secon d sulfu r recoveryplan t an d tal l ga s treate r had t o b e adde d 1 n conjunctio n wit hth e ne wDEAunit. ) Ther e have bee n n o modification s t o th e fue l ga s treate r sinc e i t wa s installed , an d i t i s performing a s expected . Th e fue l ga s treate r wa s designe d fo r a n inle t fue l ga s strea mo f 2 8 M

Mscf/day an d a n amin e circulatio n rat e o f 30 0 gallons/minute . I t 1 s currentl y operate d a t lowe r levels , 2 0 M Mscf/da

yan d 20 0 gallons/minute . Th e DE Asyste

mi s compose d o f on e strippe r an d 1 0 absorbers . Th e main , larg e absorbe r i s th e newfue l ga s treate r whic hwa s constructe d t o trea t th e fue l ga s t o NSP S combustio n sources . Th e 9 older , smalle r absorber s ar e locate d in variou s proces s units ; theyals o trea t fue l ga s bu t wer e no t necessaril ydesigne d t o mee t th e NSP S levels . Th e inle t fue l ga s t o th e newfue l ga s treate r i s a t 7 5 psi g an d les s tha n 100°F . The compositio n o f th e inle t fue l ga s varie s fro mday-to-day . Shel l does " no t routinel ymonito r o r tes t th e compositio n o f th e inle t stream . Fo r sample s take n las t month , th e inle t strea mha d 4 % Hp S b

yweigh t an

d 0.0 5 percen t mercaptan s b yweight . Th e outle t strea mwa s 0.0 1 percen t H^ S b y weigh t an

d 0.0 3 percen t mercaptan s b yweight . Ther e have bee n no majo r operating problem s wit hth e fue l ga s treater . Entraine d liquid s in th e incoming ga s ar e remove d t o a larg ° exten t b y a smal l knock-ou t pot ; however , entraine d liquid s stil l caus e occasiona l problems . T o keep dow n particl e contaminatio n in th e DEAsystem , cotto n fibe r filter s s.re

used . T o monito r th e performanc e o f th e amin e treater , Shel l monitor s th e outle t H2 S concentratio n an d the rati o o f le3 n DEAcirculatio n rat e t o th e flowo f fue l gas . The ytr yt o maintai n thi s rati o a t 1 0 gallon s o f DE Ape r minut e t o 1,000,00 0 scf/da yo f fue l gas . Shel l analyze s th e amin e a s necessary . The fue l ga s treate r i s ru n s o tha t th e outle t H2 S concentratio n i s abou t 10 0 t o 15 0 ppmv , slightl ybelowth e NSP S level . I f th e outle t H? S concentratio n goe s up , thi s indicate s t o th e systems / Clau s plan t operato r tha t th e treate r i s no t operating properly , o r tha t ther e ha s bee n a chang e i n some upstreamproces s unit . Th e operato r check s wit hth e othe r proces s unit s t o determin e i f ther e ha s bee n a productio n change , an

d adjust s th e circulatio n rat e an d strippe r stea

maccordingly . Shel l i s no t currentl yconsidering changing t o anothe r amine . Combustio n Source s Shell' s Norc o refiner yha s 1 9 newcombustio n source s subjec t t o th e NSP S fo r refiner

yfue l gas . Fourtee n o f thes e source s wer e par t o f th e new ethylen e plant . Shel l i s als o nowconstructing anothe r combustio n sourc e whic hwil l be subjec t t o NSPS ; (th e uni t ID i s F-164) .P. 5

Shel l currentl yha s abou t 7 8 operating combustio n device s in th e Norc o refinery : 2 3 ethylen e cracking furnaces , 1 0 boilers , 9 flares , 2 SCO T incinerators , 1 C O heater , an d abou t 3 3 proces s heaters . Fue l Ga s Systeman

d Natura l Ga s Blending Shel l provide d u s wit ha genera l schemati c o f thei r fue l ga s system , wit h amin e treaters , NSP S combustio n sources , an d othe r ga s stream s note d (se e Figur e 1) . T o provid e accepte d level s o f Hg S i n fue l ga s t o th e NSP S combustio n sources , Shel l selecte d it s fue l ga s stream s o f highes t H2 S concentratio n t o treat . Thes e stream s ar e treate d in th e newfue l ga s treater . Th e treate d fue l ga s i s the n blende d wit hnatura l ga s an d untreate d an

d partiall y treate d wast e ga s (relativel yH2 S free ) i n a fue l ga s blen d drum . Thi s mixe d strea

mi s the n routed t o th e NSP S combustio n sources . Some additiona l swee t wast e ga s i s als o adde d late r fo r th e ethylen e plan t proces s heaters . Shel l provide d u s wit hth e approximat e volume s o f eac hga s tha t i s routinel y used i n th e system . However , thes e ar e onl ygenera l value s becaus e th e amount s tha t ar e use d var ys o muc hfro

mday t o day .

. Fuel s i

n Fue l Ga s Syste

mVolum e Ireated fue l ga s 8 t o 2 0 M M scf/da

y Untreate d and'partiall y4 0 t o 5 0 M Mscf/da

y treate d wast e ga s Natura l ga s 0 t o 5 0 m scf/da

y Emissio n Testing Shel l provirip

H u s wit hcopie s o f report s o f tw o performanc e test s tha t ha d r>ee n conduct s o

n thei r fue l ga s t o newcombustio n sources . Th e test s wer e bot hconducte d b ySouthwes t Laboratorie s and wer e don e o

n Novembe r 4 , 1981 , an d January26 , 19 r >4 . Th e cost , o f th e recen t 198 4 tes t wa s S3200 , an d Southwes t ha d informe d Sb?l l tha t a simila r tes t todaywoul d cos t $3500 . Shel l note d tha t ther e i s an additiona l .expens e t o She'll fo r th e time o f Shell' s staf f tha t i s involve d in th e testing . Shel l wa s easil yin complianc e fo r bot htests , wit hH2 S concentration s a t 27. 5 percen t an

d 38. 8 percen t o f th e allowabl e limit . The sampling site s fo r th e tw o performanc e test s are note d o

n th e schemati c in Figur e 1 . Bot hsampling site s wer e afte r natura l ga s ha d bee n blended , bu t th e amoun t o f natura l ga s being used a t th e tim e o f th e tes t i s no t known . Emissio n Monitorin g an d Exces s Emission s T o monito r th e performanc e o f th e operatio n o f th e ne wfue l ga s treate r system , Shel l ha s tw o Tracor-Atla s monitor s whic hcontinuousl ymonito r the H£ S concentration . (Shel l ha s a DuPon t U V SO 2 monito r o

n th e Clau s tail-ga s treate r effluen t stream) . On e monito r i s locate d immediatel y afte r th e fue l ga s treater . Thi s monito r reflect s howwel l th e treate rP. 6

i s working
. Th e secon d monito ri s locate d afte rth e fue l ga s blen d dru m afte rth e blendin g o fth e treate d fue l gas , untreate d fue l gas , an d natura l gas . Thi s instrumen tmonitor s th e fue l ga s goin g t o al l th e ne w combustio n source s an d i s use d t o monito rcompliance
. Th e locatio n o f thes e continuou s emissio n monitor s (CEMS ) i s note d o n th e amin e treater/fue l ga s schemati ci n Figur e 1 . Th e outpu tfro m thes e monitor s i s sen tdirectl y t o Shell' s centra l computer , s cth e dat a ca n b e easil yreduced
. Th e monitor s als o hav e a n alar m tha ti s se ta t15 0 ppm vs o tha tth e operator s wil l b e alerte d whe n the yare nearin g a n exces s emission
. Shel l ha s a very

intens e an d sophisticate d syste m fo rCEM S operatio n an d maintenance , includin g Shell' s interna l qualit yassuranc e specifications
. Shel l consider s th e monitor s a ver ycostly , high-maintenanc e item , an d estimate s tha ti trequire s 10 * o fon e person' s tim e t o kee p th e monitor s runnin g properly
. Thi s i s much more tim e tha n th e vendo restimates
. Shel l ha s a n interna l requiremen to n al l it s CEM' s o f97 % uptime
. Shell' s maintenanc e an d qualit yassuranc e schedul e fo rth e Hg S CEM' s consist s o fdail yvisibl e checks , an d weekly-spa n check s a t80 % o fscal e (.300 ppmv)
. The yals o occasionall ychec k th e monitor s wit h a lowe rconcen tratio n gas . The yhav e no tha d an yseriou s drif tproblems
. Shell' s polic y i s t o selec ta monito rtha tcoul d ru n fo r30 day s unattende d an d the n ten d t o i tever yday
. I fa n operato rsuspect s a proble m wit h th e CE.M's values , Draege r tub e sample s are . taken
. Thi s occur s abou t3 o r4 time s a month
. Th e CEM' s value s generall ycompar e wel l wit h Draege rtub e results
. Shel l provide d u s wit h thei restimate d exces s emissio n recor d fo rth e pas t year . Tim

ePerio d%tim ei ncomplianc ewit hNSP S 3 0 ly2 3 977 3 4 Q 19S 3 90. 2 IQ 198 4 94. 8 2 0 198 4 93. 8 I ti s importan tt o not e tha ti fth e analyze ri s no tworking , Shel l treat s i t lik e a violation
. Thus , ther e ar e some "violations " tha tsre reall ydu e t o monito rdowntime
. Shel l complaine d abou tEP ARegio n 6' s interpretatio n o fa n exces s emissio n period
. Shell , o n previou s occasion , ha s bee n instructe d by Regio n 6 t o repor tever y3-hou rrollin g averag e perio d whe n reportin g NSP S violations
. Shel l feel s the yshoul d onl yhav e t o repor tdiscree t3-hou r period s o rtota l period s o fnon-complianc e an d the yfee l i ti s a n extr a burde n t o reduc e th e dat a int o th e othe rformat
. Shel l estimate d tha ti t take s 8 hour s pe rmont h t o prepar e th e exces s emissio n repor ti fther e hav e bee n excursion s abov e th e standard
.P. 7

Shel l di dno t have thei r monitorin gresult s readil y availabl e i nNSP S repor t forma t becaus e they ar e require donl y

t o repor t exces s emission s a s define db

y Stat e regulations . Routin e operatin gmonitorin gvalue s ar e available . Generally , th e concentratio no f H2 S inth e strea m afte r th e blendin gdru

m range s fro

m 12 5 t o 16 0 ppmv . Th e prime purpos e o f th e monitor s wa s fo r NSP S complianc e purposes . However , the yar e bein g relie do n heavil ya s an indicato r o f th e amin e treater' s performance . Shel l ha s n o plan s t o integrat e th e monitor s int o a n automati c proces s contro l system . Cos t o f Complyin g wit hth e NSP S Shel l personne l di dno t have a complet e breakdow no f th e cost s tha t they incu r t o compl ywit hthi s NSPS . Th e majo r component , o f course , i s th e capital , operating , and labo r cost s o f th e amin e treate r syste mand it s associate d sulfu r recover yunit . Th e direc t cost s o f emissio n testing , wer e note d previously , a s wer e th e maintenanc e and reportin g cost s fo r monitoring . (Capita l cost s fo r th e monitor s coul d b e obtaine d fro mth e vendor. ) Comment s o r Problem s wit hth e NSP S Shel l wa s generall ysatisfie d wit hth e leve l o f th e NSP S (16 0 ppmv ) and fel t tha t i t wa s technologicall yfeasibl e t o mee t tha t .leve l consistently . A s mentione d previously , Shel l di d no t lik e th e EP ARegio n 6' s interpretatio n o f th e requirement s fo r monitorin g exces s emissio n reports . Shell' s mai n complain t concerne d th e definitio n o f th e affecte d facilit yi n th e NSPS . Sinc e an yne wcombustio n sourc e i s considere d an affecte d facility , a large , existin g refinery , suc ha s Shell , mus t instal l a n amin e treate r fo r contro l fo r a smal l reconstructio n compare d wit hth e siz e o f th e refinery . Shel l suggeste d tha t th e siz e o f th e modificatio n o r reconstructio n b e compare d to^th e siz e o f th e refiner y(50% ) t o determin e i f i t woul d b e affecte d b y th e NSPS . V . SUWARY : Shell' s Norc o refiner yi s representativ e o f a large , olde r refiner y tha t ha s bee n graduall yupgrade d and becom e subjec t t o th e NSPS . Th e plan t visi t wa s ver yinformativ e fo r us , and Shel l personne l wer e ver y helpful . Shel l provide d u s wit hcopie s o f tw o emissio n tes t report s and tw o schemati c diagrams . The yindicate d tha t th e informatio n provide d and th e topic s discusse d wer e no t considere d t o b e proprietary . 6 Attachment s cc : C . Sedman , IS B D . Wells , SD B ESED/ISB/SD S NDMcLaughlin/cbaker/bjoverma n x559 5 Rm . 75 2 MU(MD-13 ) File : AI P 8.1.15. 2 Project : 83/0 3 Disk : McLaughli n 1 Retype d 1/31/8 5 chbake rP. 8

LIS T O F ATTACHMENT S Tri pRepor t fo r Shel l Oi l Company , Norco , L A 1 . Busines s card s 2 . Figur e 1 - Schemati co ffue l gas/amin e treatin g syste m 3 . Figur e 2 - Schemati co ffue l gas treate rwit h proces s Instrumentatio n 4 . Emissio n tes trepor t- 11/4/8 1 5 . Emissio n tes trepor t- 1/26/8 4 6 . Brochur e abou tShell' s Norco manufacturin g complex
.P. 9



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### SHEL LOI LCOMPAN Y Norco , Louisian a SW LProjec t

No : 54-90 7

INTRODUCTIO

N Fiel dsamplin g fu r

hydroge nsulfid ea t

th e OL- 5 Pyrolysi s Furnac eFue l Gas Lin eo f

SHEL LOILCOMPANY'

S Norco , Louisian afacility , was conducte d Novembe r 4 , 198 1 by personne lo f Southwester nLaboratories ' Environmenta l Engineerin g Service s Division . Presen t durin g th e samplin g perio dwer e Mr . Da nO'Connor

an dstaf f

o f SHEL LOI LCOMPANY

, Mr . Rober t

A . Ress l o f Pedc o Environmental , Inc . (th e E.P.A . representative ) andMessrs . Joh nR . Smith(Senio r

Fiel dSupervisor ) andC . Mar k Tipto n(Environmenta lTechni
cian ) o f Southwester nLaboratories , Inc .
• Samplin g was conducte dt o determin eth e hydroge nsulfid econten t withi nth e.source , i norde r t o provid edat arequire db y th e U.S . Environ
menta lProtectio nAgency' s (E.P.A. ) "Standard s o f Performanc efo r

Ne w Stationar y Sources" , Subpar t J , a s containe di n40 CF R60 an dPermi t

No . .PSD-LA-8 . RESULT S Result s o f

eac hsample , calculate di naccordanc ewit hE.P.A . proce dures , are - show

ni n"Summar

y o f Samplin g Results " (Figur eNo . 2) andar e summarize dbelow: • Ru n No . 1 2 3 Averag e H2 S

Concentratio n 41. 1 mg/uso n 

### 190. 1 mg/dso n 36. 4 mg/dsc m Allowabl e H2 S Concentratio n 23 0 mg/dsc m 23 0 mg/dsc m 23 0 mg/dsc m 

### %c Allo v 1 7 £ 2 1 5 > f .•able 9% 1% 8%

•CUTM»XI1E« N LUBOIiTOBlt lP.1 2

SHEL L OI L COMPANY S MProjec t No : 54-90 7

Th e averag e H 2 S concentratio n fo r al l thre e run s wa s 89. 2 mg/dscm , o r 38.8 % o f th e state d allowabl e concentratio n o f 23 0 mg/dscm . PROCEDUR E Samplin g equipmen t an d procedure s wer e i n conformity , e.xcept wher e noted , wit hReferenc e Metho d 1 1 o f th e Environmenta l Protectio n Agenc y (a s containe d i n Appendi xA , Referenc e Method s o f th e Ne wSourc e Perform
anc e Standard s o f th e E.P.A.) . Determinatio n o f Hydroge n Sulfid e Conten t - Fue l Ga s Stream s - Metho d 11 : Asamplin g trai n simila r t o th e on e describe d i n E.P.A . Metho d 1 1 (a s containe d i n 4 0 CF R 60 , Appendi xA) , wa s use d t o collec t th e samples . Impinger. 1 containe d 1 5 m l o f 3%H-XL , Impinge r 2 wa s dry , Impinger s 3 , 4 and 5 eac hcontaine d 1 5 m l o f pH 3 cadmiumsulfat e solution , an d Impinge r 6 containe d silic a gel . Si xsample s wer e obtained , wit hth e arithmeti c averag e o f tw o sample s o f equa l samplin g tim e constitutin g on e run . Th e fue l ga s lin e pressur e wa s sufficien t t o operat e th e train , therefo r a vacuumpump wa s no t neces sar yt o obtai n sample s fro mth e line . (Se e Figur e No . 3 fo r schemati c o f samplin g train. ) Eac hsampl e wa s 1 1 minute s i n duration , averagin g ap proximatel y18 . 5 . liter s o f duc t gas . Eac hsampl e wa s conducte d a t a n approximat e samplin g rat e o f 1.6 8 liters/min . A t th e conclusio n o f eac h sample , th e trai n wa s purge d wit hambien t ai r fo r 1 5 minute s t o ensur e tha t al l th e H- S wa s remove d fro m th e peroxid e impinger .

lOUTHXCITCD N LABOB.VTORIE *P.1 3 _



### SHEL LOI LCOMPAN Y SW LProjec t No : 54-90 7

Prio r t o an dfollowin g eac hsampl erun , lea k check s o f

th esamplin g syste mwer eperformed . Upo ncompletio no f

eac hsampl erun , th esample s wer ecarrie dimmediatel y t o th eanalytica lsite . D . SAMPLERECOVER Y I n accordanc e wit hprescribe d techniques , hydroge n sulfid e determina
tion s wer e mad e o n sit e usin g sodiumthiosulfat e solutio n a s a titrant . .Analytica l dat a sheet s and calculation s ar e include d wit hthi s report , an d ar e summarize d i n "Summar yo f Samplin g Results" , Figur e No . 2 . 

### E . CUSTOD

YO FSAMPLE S Afte r completio no f

tests , eac hsampl ewas place di nth ecustod y o f th etechnicia nresponsibl efo r analysis . I t

was hi s assigne dresponsi
bilit y t o insur etha t

eac hsampl ewas recorde dandcorrectl y analyzed . Analysi s o f

sample s was performe di nla b facilitie s a t th ejobsit eb y Environmenta lEngineerin g Service s personnel . I t was th eduty o f

th e Senio r Fiel dSuperviso r

t o answe r

any procedura lquerie s fro mth eEnviron
menta lTechnician . F . QUALIT YASSUPANC E

Southwester n Laboratories , Inc . maintain s a stric t Qualit yAssuranc e program . Include d i n th e progra m wher e applicabl e are : equipmen t cali
bratio n check s suc ha s th e Mete r Bo xGamm a check , performe d afte r eac h fiel d used ; baromete r an d thermomete r calibratio n checks ; balanc e cali
bratio n checks ; analytica l calibratio n checks ; and calculatio n checks .

SOUTMWESTCH N LABORATORIE S 

### -3
- I • •P.1 4
SHEL LOI LCOMPAN Y SW LProjec t

No : 54-90 7

Als o include di nSWL' s Qualit y .\ssuranc c progra mi s it s participatio ni n th eE.P.A . Inter-Laborator y Sourc eSurve y fo r Method s 5 , 6 an d7 . G. DISCUSSIO

N Samplin g was delaye ddu et o aplan t upse t th emornin g o f

November

4 , 1981 . Duet o th einaccessabilit y o f th emid-poin t

prob ei nth efue lga s lin e(approximatel y fort y fee t i nelevation) , i t

wa s agree dt o obtai n sample s fro ma1/4-inc hstainles s stee ltubin g lin euse dt o connec t th e fue lga s lin et o aspecifi c gravit y analyzer . Sample s wer edraw ndown


### strea mo f

th eswir lfilte r

o f th especifi c gravit y analyzer . Prio r t o conductin g tests , th eE.P.A . Regio n6 offic ewa s notifie dan

dapprove d o f th esampl elocation . H. SIB-MAR

Y Samplin g was conducte donl y durin g stabl eplan t operations . Theaverag eH

2

### S concentratio nfo r

th ethre esampl erun s wa s 89. 2 mg/dscm . Thi s represent s 38.8 % o f th estate dallowabl econcentratio no f 23 0 mg/dscm . W^tP/

.?& '

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### SHEL L OI L COMPANY Norco , Louisian a
SW L Projec t No . 54-1189 B

A . INTRODUCTIO N

Fiel d samplin g fo r hydroge n sulfid e a t th e Blend Dru m Fue l Ga s Lin e o f SHEL L OI L COMP.ANY ' s Norco , Louisian a facility , wa s conducte d Januar y26 , 198 4 b ypersonne l o f Southwester n Laboratories ' Environmenta l Engineerin g Service s Division . Presen t durin g th e samplin g perio d wer e Mr . Ke n McAuliff e and staf f o f SHEL L OI L COMPANY , an d Messrs . Russel l J . DiRaim o (Projec t Engineer ) an d John R . Smit h(Senio r Environmenta l Technician ) o f Southwester n Laboratories , Inc . Samplin g wa s conducte d t o determin e th e hydroge n sulfid e conten t withi n th e source , i n orde r t o provid e dat a require d by ; th e U.S . Environmenta l Protectio n Agenc y (E.P.A. ) "Standard s o f Performanc e fo r Ne wStationary Sources" , Subpar t J , a s containe d i n 4 0 CF R 60 , an d th e applicabl e Stat e o f Louisian a • Environmenta l Contro l Commissio n regulation s (Permi t No . 1669T) .

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### SHEL L OI L COMPANY SW L Projec t No . 54-1189 B

B . RESULT S

Result s o f eac hsample , calculate d i n accordanc e wit h E.P.A . procedures , ar e shown i n "Summaryo f Samplin g Results " (Figur e No . 2 ) an d ar e summarize d below :
Run No . 1 2 3 Averag e H 2 

### S Concentratio n 65. 8 mg/dsc m 61. 6 mg/dsc m 62. 5 mg/dsc m Allowabl e H 2 

### S Concentratio n 23 0 mg/dsc m 23 0 mg/dsc m 23 0 mg/dsc m % o f Allowabl e 2 8 26 . 2 7 6 % 8 % 2 %


### Th e averag e H_ S concentratio n fo r al l thre e run s wa s 63. 3 mg/dscm , o r 27.5 % o f th e state d . allowabl e concentratio n o f 23 0 mg/dscm .
C . PROCEDUR E

Samplin g equipmen t an d procedure s wer e i n conformity , excep t wher e noted , wit hReferenc e Metho d 1 1 o f th e Environmenta l -Protectio n Agenc y(a s containe d i n Appendi x A , Referenc e Method s o f th e Ne wSourc e Performanc e Standard s o f th e E.P.A.) .

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### SHEL L OI L COMPANY SW L Projec t No . 54-1189 B

Determinatio n o f Hydroge n Sulfid e Conten t - Fue l Ga s Stream s - Metho d 11 : Asamplin g trai n simila r t o th e on e describe d i n E.P.A . Metho d 1 1 (a s containe d i n 4 0 CF R 60 , Appendi xA) , wa s use d t o collec t th e samples . Impinge r 1 containe d 1 5 m l o f 3 % H_0_ , Impinge r 2 wa s dry , Impinger s 3 , 4 an d 5 eac h containe d 1 5 m l o f pH 3 cadmiu msulfat e solution , an d Impinge r 6 containe d silic a gel . Si xsample s wer e obtained , wit hth e arithmeti c averag e o f tw o sample s o f equa l samplin g tim e constitutin g on e run . Th e .fue l ga s lin e pressur e wa s sufficien t t o operat e th e train , therefor e a vacuumpum p wa s no t necessar yt o obtai n sample s fromth e line . (Se e Figur e No . 3 fo r schemati c o f samplin g train) . Eac hsampl e wa s 1 1 minute s i n duration , averagin g approximatel y12. 8 liter s o f duc t gas . Eac h sampl e wa s conducte d a t a n approximat e samplin g rat e o f 1.1 6 liters/min . A t th e conclusio n o f eac hsample , th e trai n wa s purge d wit hambien t ai r fo r 1 5 minute s t o ensur e tha t al l i th e H» S wa s remove d fromth e peroxid e impinger . Prio r t o an

d followin g eac hsampl e run , lea k check s o f th e samplin g syste mwer e performed . Upo n completio n o f eac h sampl e run , th e sampl e wer e carrie d immediatel yt o th e analytica l site .

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### SHEL L OI L COMPANY SW L Projec t No . 54-1189 B
S.AMPLE ' RECOVER Y I n accordanc e wit hprescribe d techniques , hydroge n sulfid e determination s wer e mad e o n sit e usin g sodiu m thiosulfat e solutio n a s a titrant . Analytica l dat a sheet s an d calculation s ar e include d wit hthi s report , an d are summarize d i n "Summaryo f Samplin g Results" , Figur e No . 2 .
CUSTOD Y O F SAMPLE S Afte r completio n o f tests , eac hsampl e wa s place d i n the custodyo f th e fiel d cre wmembe r responsibl e fo r analysis . I t wa s hi s assigne d responsibilit yt o insur e tha t eac hsampl e wa s recorde d an d correctl yanalyzed . Analysi s o f sample s wa s performe d i n labfacilitie s a t th e jobsit e by Environmenta l Engineerin g Service s personnel . I t wa s th e dut yo f th e Projec t Superviso r t o answe r an yprocedura l querie s fromth e Environmenta l Technician . QUALIT Y ASSURANC E Southwester n Laboratories , Inc . maintain s a stric t Qualit yAssuranc e program . Include d i n th e programwher e applicabl e are : equipmen t calibratio n check s suc ha s th e Mete r Bo xGamma check , performe d afte r eac hfiel d use ; baromete r and thermomete r calibratio n checks ; balanc e calibratio n checks ; analytica l calibratio n checks ; an d calculatio n checks . Als o include d i n SWL' s Qualit y

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### SHEL L OI L COMPANY SWL Projec t No . 54-1189 B
Assuranc e progra mi s it s participatio n i n th e E.P.A . Inter Laborator ySourc e Surve yfo r Method s 5 , 8 and 7 .
DISCUSSIO N Samplin g wa s conducte d January26 , 198 4 durin g norma l plan t operations . Al l samplin g an d analyse s wer e conducte d i n accordanc e wit hE.P.A . regulations .
H . SUMMARY

Samplin g wa s conducte d onl ydurin g stabl e plan t operations . Th e averag e H_ S concentratio n fo r th e thre e sampl e run s wa s 63. 3 mg/dscm . Thi s represent s 27.5 % o f th e state d allowabl e concentratio n o f 23 0 -mg/dscm .

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