NATIONA L POLLUTAN T DISCHARG E ELIMINATIO N SYSTE M (NPDES ) PERMI T Fac tSheet/Permi tEvaluatio n Repor t Orego n Departmen t

o f Environmenta l Qualit y 202 0 S W Fourth Avenue , Suite 40 0 Portland , Orego n 9720 1 503-229-526 3 FA X 503-229-694 5

Permittee : Blu e Hero n Pape rCompany

Source s Covered : Aerate dstabilizatio n basi n effluent (proces s wastewater , coolin g water , stormwater ) - Outfal l 001 ; Filte r plan t discharg e - Outfal l 002 ; Miscellaneou s effluent s (stormwate r

an dgroundwate r

seepage ) - Outfall s 003 , 00 4 an d00 5 Sourc e Category : Majo r Industria l Fil e Information : WQ-Clackama s County Fil e No
. 7263 4 EP A Referenc e No. : OR000056- 6 Prepare d by : Ro b Burkhart 503-229-556 6 Northwes t

Regio n - Wate r

Qualit y Facilit y Location : 41 9 Mai n St
. Orego n City , Orego n 9704 5 Receivin g Stream : Willamett e Rive r

Propose d Action : Issuanc e o f

renewa l permi t Sourc e Contact : Bruc e Marti n Director , Energ y & Environmental Department (503 ) 650-426 9 Dat e Prepared : 1/31/200 6 Updated : 2/2/0 6 an d4/28/0 6Blu e Hero n Pape rCompan y Permi tEvaluatio n Report/Fac tShee t Tabl e o f Content s Sectio n Pag e 3 3 9 1 8 2 2 2 4 2 4 3 4 3 4 4 2 4 2
Attachmen t

A : 200 1 NPDE S Permi t Attachmen t

B : Dissolve dOxyge n Analysi s Attachmen t

C : Reasonabl e Potentia l Analysi s - Outfal l 00 1 Attachmen t

D : Reasonabl e Potentia l Analysi s - Outfal l 00 2 Attachmen t

E : Chlorin e Effluent

Limi t Calculation s - Outfal l 00 2 Attachmen t

F : Outfal l 00 2 Turbidit y Limi t Calculation s Attachmen t

G : Therma l Plum e Calculation s - Outfal l 00 1 1.0 2. 0 3. 0 4. 0 5. 0 6. 0 7. 0 8. 0 9. 0 10. 0 11. 0 Descriptio n o f

Propose dActio n Facility Descriptio n Wate r Qualit y Issue s Existin g Permi t

Limit s Technolog y Base dLimit s Compariso n o f

200 1 Permi t

Limit s an dTechnolog y Base dLimit s Wate r Qualit y Analysi s Complianc e History Discussio n o f

Propose dPermi t Nex t Step s Attachment sPermi t Evaluation Repor

t Blu e Heron Pape

r Compan y 1. 0 Descriptio n o f

Propose d Actio n A Nationa l Pollutan t

Discharg e Eliminatio n Syste m(NPDES ) permi t wa s issue db y th e Departmen t

o f Environmenta l Quality (Department ) t o th e Blu e Hero n Pape r Compan y (Blu e Heron ) o n Augus t

1 , 200 1 (200 1 NPDE S permit)
. Th e permi t expire s o n Jul y 31 , 2006
. Th e Departmen t

receive dan NPDE S permi t renewa l applicatio n o n Decembe r 22 , 2004
. Th e Departmen t

i s no w proposin g t o rene w th e NPDE S permi t for Blu e Heron
. Ther e ar e four primar y reason s for

permi t renewa l a t

thi s time : 1 ) Backwas h wate r fro mth e filter

plant , whic h i s allowe dunde r

th e curren t

permi t t o b e discharge dwithou t treatment , need s t o b e addressed ; 2 ) Modification s ar e necessar y to accommodat e th e mill' s propose dprojec t to reus e (recycle ) an d estimate d2 0 percen t

o f it s wastewater ; 3 ) Th e permit' s effluent limit s nee dto b e modifie dt o addres s th e ne w temperatur e standards ; an d4 ) Th e turbidity complianc e schedul e need s t o addres s th e issue s o f

filter backwas h treatment , th e expecte dreus e (recycling ) o f th e plant' s wastewater , an dth e schedule dmodificatio n o f th e wate r quality turbidity rule
. Th e Federa l Wate r

Pollutio n Contro l Ac t

o f 197 2 an dsubsequen t

amendment s requir e an NPDE S permi t for th e discharg e o f

wastewate r

t o surfac e waters . Furthermore , Orego n Revise dStatut e (OR S 468B.050 ) als o require s apermi t for th e discharg e o f

wastewate r

t o surfac e waters . Thi s propose dpermi t

actio n b y th e Departmen t fulfill s bot h federal an dstat e requirements
. 2. 0 Facilit y Descriptio n 2. 1 Genera l Th e Blu e Hero n Pape r

Compan y i s a n employee-owne dpape r mil l i n Orego n City , Oregon
. Th e facility i s locate do n an eas t ban k o f th e Willamett e Rive r

near Willamett e Fall s (se e Fig
. 1)
. 

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FIGUR E 1 - SIT E MA PPermi t Evaluation Repor

t Blu e Heron Pape

r Compan y Th e facility manufacture s newsprin t an dothe r

simila r type s o f paper s fro mamixtur e o f recycle d newspaper s an dmagazines , woo dchip s an dpurchase dpulp
. Recycle dpaper s ar e pulpe dthroug h adeinkin g proces s an dwoo dchip s ar e pulpe dthermo-mechanically
. Th e deinkin g (Dl ) proces s involve s repulpin g an ddeinkin g recycle dpape r usin g wate r

alon g with mechanica l an dchemica l processes . Reject s fromthi s proces s are eithe r sen t to th e wastewate r

treatmen t

syste mo r

handle d a s soli dwaste . I n th e thermo-mechanica l pul p (TMP ) process , woo dchip s receive dat th e facility are washed , refine dt o pul p unde r pressur e an dscreened
. Th e mil l use s hydroge n peroxid e an dothe r

totall y chlorine-fre e processe s t o bleac h pul p a s needed , dependin g o n th e require dpape r

grade
. Fina l pape r

productio n occur s wit h pape r machine s wher e th e recycle dan d virgi n fiber

pulp s ar e dewatered , presse dan dotherwis e processe dt o produc e primaril y newsprin t grade s o f paper . Th e pape r

i s woun dont o larg e reels , cut , rewoun dt o mee t customers ' orde r specifications , an dweighe dbefor e bein g wrappe dan dshipped
. Th e averag e monthl y productio n rat e o f pape r i s approximatel y 64 0 ton s pe r day
. Th e averag e productio n rat e o f

pul p fromth e deinkin g proces s i s 37 5 ton s pe r day an dfromth e thermomechanica l pulpin g proces s i s 27 5 ton s pe r day
. 2. 2 Wastewate rTreatmen tan d Discharg e Wastewate r

at Blu e Hero n i s generate di n fiv e primary areas : th e pape r machin e process , th e deinkin g process , filter

plan t backwash , th e steamplan t an dth e bleac h plant
. Durin g rain y period s stormwate r

i s als o collecte d(an dtreated ) at th e site
. Th e process , steamplan t an dbleac h plan t wastewaters , alon g wit h an y stormwate r runoff , ar e treate dan ddischarge dthroug h outfal l 001
. Wastewate r

fromth e filter

plan t i s currentl y discharge dthroug h outfal l 002
. Th e propose d permi t include s arequiremen t

for eliminatin g filter

plan t discharge s fro moutfal l 00 2 an d reroutin g the mt o th e treatmen t syste mfor

discharg e fromoutfal l 001
. Outfall s 003 , 00 4 an d00 5 ma y discharg e miscellaneou s wastewater s unde r unusua l conditions , bu t

are seldo mused
. Th e location s o f

thes e outfall s ar e presente di n figure 2
. Eac h o f th e wastewate r

discharge s mentione d abov e i s discusse di n mor e detai l below
. 2.2. 1 Outfal l 001 , Aerate d Stabilizatio n Basi n Effluen t Wastewate rGeneratio n Pape rMachine s Proces s Wastewate r Proces s wastewate r

i s generate dfro mthre e pape r machines—No
. 1 , No
. 3 , an dNo
. 4
. Pape r Machin e No
. 2 i s n o longe r i n service
. Pape r

Machin e No
. 4 ha s arate ddesig n capacity o f 42 0 Mg/d(megagra mpe r

day , metri c ton ) (machin e dry)
. Th e smalle r pape r machines , No
. 1 an dNo
. 3 , ar e rate dat

22 0 Mg/ d(machin e dry ) an d16 0 Mg/ d(machin e dry) , respectively
. Althoug h al l thre e pape r

machine s wer e installe dprio r t o 1920 , the y hav e bee n upgrade dove r th e years . Th e pape r makin g proces s include s si x steps : 1
. Pul p Syste m 2
. Formin g Sectio n 3
. We t Pres s Sectio n 4
. Dryin g Sectio n 5
. Calende r

an dRee l 6
. Windin gPermi t Evaluation Repor

t Blu e Heron Pape

r Compan y Pul p fromth e Dein k

an dTM P mill s i s processe dthroug h amulti-stag e screenin g an dcleanin g system . A deculato r

(vacuum ) i s use dt o remov e entraine dai r fromth e pulp
. Blende dpul p i s sen t t o th e headbo x where , unde r pressure , th e pul p i s evenl y distribute dont o th e formin g sectio n o f th e pape r machine
. A t

thi s poin t th e pul p consist s o f

roughl y 9 9 percen t

wate r an d1 percen t

pulp
. Th e pape r machin e use s wove n fabri c with vacuu mt o for mashee t o f pape r o f approximatel y 1 4 percen t solids
. Th e pape r

the n enter s th e pres s sectio n wher e felts , vacuum , an droll s ar e use dt o squeez e ou t

mor e water . Th e fiber s no w begi n t o bon dan dfor masmooth surface
. Th e shee t at thi s tim e contain s approximatel y 4 5 percen t solids
. Th e shee t

the n enter s th e drye r

sectio n wher e steami s injecte dint o drye r can s t o hea t

th e shee t t o approximatel y 8 2 °C
. Wate r i n th e shee t evaporate s an di s exhauste db y drye r hoo dfans
. Th e shee t

i s no w approximatel y 9 2 percen t solids
. Onc e th e shee t

ha s lef t th e drye r sectio n i t i s calendered , usin g stee l roll s t o increas e smoothnes s an dto eve n ou t th e caliper
. Th e shee t

i s the n woun dont o reel s an dtransporte dt o th e winder
. Th e winde r

i s use dt o creat e arol l o f pape r base do n custome r

requirement s for

widt h an d diameter
. Finishe droll s are the n wrappe dan dshippe db y truc k o r rai l car t o th e customer . Th e pape r machine s typicall y generat e th e bul k o f th e wastewater

—approximatel y 19,00 0 cubi c meter s pe r

day (m 3 /d ) ( 5 MGD ) —t o b e treate di n th e wastewate r treatmen t

system . Deinkin g Proces s Wastewate r Th e deinkin g proces s produce s approximatel y 362. 9 Mg/do f fiber that i s blende dwith thermomechanica l pul p (TMP ) an dpurchase dpul p t o fee dth e pape r machines
. Th e deinkin g proces s als o generate s proces s wastewate r fromth e dein k

repulpers , th e deink

plant , an dDein k Mil l "H"
. Typically , approximatel y 11,00 0 m 3 / d( 3 MGD ) o f wastewate r

i s generate dfromth e deinkin g operations
. Stea m Plan t Th e steamplan t

typicall y generate s 570 0 m 3 / d(1. 5 MGD ) o f boile r blowdow n that

enter s th e wastewate r

system . Bleac h Plan t Th e hydroge n peroxid e bleac h plan t typicall y generate s 76 0 m 3 /d(0. 2 MGD ) o f wastewater . N o chlorin e i s use di n th e bleachin g process . Wastewate rTreatmen t Proces s wastewate r

fromth e source s describe dabov e i s conveye dthroug h on e o f tw o pump station s t o on e primar y clarifie r for primar y sedimentation
. Primary clarifie r solid s (PCS ) are dewatere dthe n use da s beddin g for dairy cattl e o r

are lan dapplie da s asoi l amendment
. Th e primar y effluent

i s conveye dt o an aerate dstabilizatio n basi n (ASB ) o n th e north (als o west ) sid e o f th e Willamett e Rive r

for secondary treatmen t

prio r t o discharg e to th e Willamett e River
. Primar y Effluen tFlo w Mete r Th e flo w reporte do n th e Discharg e Monitorin g Report s (DMRs ) i s measure dat th e effluent

from th e primar y clarifier
. Th e primary effluent mete r i s aFoxbor o E9 6 magneti c mete r wit h flo w converte r an dtransmitter
. Aerate d Stabilizatio n Basi n (ASB ) Th e aerate dstabilizatio n basi n (ASB ) i s locate dapproximatel y 2. 4 kilometer s (km ) upstrea mo f th e mill , o n th e opposit e sid e o f th e river
. Treate deffluent fro mth e AS B i s discharge dt o th e Willamett e Rive r

a t (approximately ) RM 27. 5 throug h amulti-port diffuser
. Beside s providin g biologica l treatment , settlin g i s accomplishe di n th e ASB
. Whe n necessary , th e AS B i s dredge dt o remov e accumulate dsolids
.Permi t Evaluatio n Report Blu e Hero n Pape r

Compan y

AS B Effluen tFlo w Th e AS B effluent

flo w i s no t

measure ddirectly
. Th e primar y clarifie r effluent flo w a s recorde d b y th e magneti c mete r

ha s bee n determine dto b e essentiall y equivalen t t o th e effluent

flo w b y les s tha n 1 percent . 2.2. 2 Outfal l 002 , Filte rPlan tEffluen t Wate r t o suppl y th e mill' s productio n processe s an dsupportin g service s i s take n fromth e Willamett e Rive r

wate r treatmen t

plant
. Wate r

treatmen t

include s settling , flocculation

coagulation , an dfiltration
. Th e wate r treatmen t

plan t generate s an intermitten t wastewate r discharge
. Thi s discharg e generall y occur s thre e time s pe r day an deac h occurrenc e last s approximatel y 3 0 minutes
. Existin g effluent limitation s for

th e filter backwas h include s p H an d monthl y average/dail y maximu mtota l suspende dsolid s (TSS ) aggregate dwith th e othe r outfalls
. Outfal l 00 2 i s locate dat

approximatel y R M 26.1 , downstrea mo f Willamett e Falls
. 2.2. 3 Outfall s 003 , 004 , an d 005 , Miscellaneou s Effluent s Outfall s 003 , 004 , an d00 5 are tailrace s unde r th e plan t designate dMil l H , No
. 1 , an dNo
. 2 , respectively
. Eac h o f

thes e tailrace s ha s adiversio n structur e that capture s stormwater , groundwate r

an ddamseepag e t o b e sen t to th e plant' s treatmen t

system . Th e tailrace s als o ac t a s containmen t

for an y spill s that

ma y occur . Previou s discharge s to th e tailrace s use dt o includ e pump sea l an dai r

compresso r

coolin g waters . Thes e ar e n o longe r discharge dt o th e tailraces
. A s discusse dbelow , discharge s fromthes e outfall s coul doccu r onl y whe n th e diversio n structure s ar e inundate db y th e rive r a t hig h flows
. Outfal l 00 3 - Mil l "H " Tailrac e Source s includ e groundwate r an dseepag e fro mth e PG E dam
. A smal l diversio n structur e i n th e tailrac e divert s th e flo w int o th e mill' s wastewate r treatmen t

syste mwhic h after

primar y an d secondary treatmen t

i s discharge dthroug h outfal l 001
. Discharg e fromthi s outfal l i s onl y expecte dt o occu r

abou t onc e every tw o year s whe n hig h rive r wate r submerge s th e diversio n structur e resultin g i n th e groundwate r an dseepag e collecte dbehin dth e diversio n structur e t o mi x wit h th e rive r

water . Outfal l 00 4 - # 1 Tailrac e Source s includ e groundwate r an dstormwate r

that fall s alon g th e Unio n Pacifi c rai l lin e throug h th e mill , an dseepag e fromth e PG E dam
. A smal l diversio n structur e i n th e tailrac e divert s flo w int o th e mill' s wastewate r treatmen t

system . Th e are abehin dth e diversio n structur e i s use dfor containmen t

o f potentia l leak s i n th e mill' s wastewate r collectio n pipin g an dpulpin g processe s whic h travers e th e tailrac e area . A s with outfal l 003 , discharg e fro mthi s outfal l coul donl y occu r abou t onc e every tw o year s whe n hig h rive r wate r submerge s th e diversio n structur e resultin g i n th e mixin g o f

rive r wate r with th e groundwate r

an dseepag e collecte dbehin dth e diversio n structure . Outfal l 00 5 - # 2 Tailrac e Source s includ e groundwate r an dseepag e fro mth e Unio n Pacifi c railroa dtrac k bed
. A tal l diversio n structur e i s buil t acros s th e outfal l an dth e flo w i s diverte dto th e mill' s wastewate r treatmen t system . Th e are abehin dth e diversio n structur e i s use da s containmen t for th e potentia l stoc k spil l o r aleak i n th e wastewate r

collectio n pipin g whic h traverse s th e tailrac e area . Th e diversio n structur e i s severa l feet highe r tha n th e structure s at

outfall s 00 3 an d00 4 s o th e likelihoo do f

rive r wate r submergin g th e diversio n structur e - whic h coul dresul t i n adischarg e - i s extremel y low
.Permi t Evaluation Repor

t Blu e Heron Pape

r Compan y

* - «*V
. 'A ':'
\ !• " • *^< *

. ••.•- < • l ! ' '
- ' "

• • ' * v ,.1
. 4 , f. Outfal l 

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### AL .

Outfall s 00 3 00 4 & 00 5 (Locate d a t Plant ) 

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_ Outfal l 

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. ' 0 

### utgt'jnv ' • ; FIGUR E 2 - DISCHARG E LOCATION S 2. 3 Solid s Managemen t Th e existin g NPDE S permi t (Appendi x A ) require s (Schedul e D, Specia l Conditio n 10 ) that sludg e (solids ) b e manage di n accordanc e wit h an approve dsludg e managemen t plan
. Schedul e B , a s amended , require s monthl y an dannua l reportin g o f sludg e disposa l an dreuse . Primary clarifie r solid s are dewatere dan dth e solid s ar e use da s dairy beddin g o r a s asoi l amendment
. Th e Department' s principa l wate r qualit y concer n i s for

satisfactory managemen t o f th e lan d applicatio n activitie s t o ensur e that th e solid s are use dbeneficiall y an di n an environmentall y acceptabl e manner . 2. 4 Spil l Contro l I n 199 2 an d1993 , majo r

improvement s wer e mad e t o prevent , control , an dcontai n spill s an d unplanne drelease s o f

proces s wastewate r

fro mth e wastewate r

collectio n an dconveyanc e system . Th e centerpiec e o f

th e syste mi s aspil l contro l tunne l wit h a n instrumentatio n an dcontro l system . I f proces s wate r

increase s fro mth e productio n processe s an dth e wate r leve l rise s i n th e primar y clarifier , effluent

pump s start

sequentiall y t o maintai n th e leve l i n th e clarifier
. I f th e wate r leve l become s to o hig h i n th e clarifier , outpu t o f th e pump s i n Pum

p Statio n No
. 1 (P S No
. 1 ) i s reduced
. Th e sam e occur s for P S No
. 2 i f

i t i s o n line
. Wate r

wil l the n bac k

u p int o th e spil l tunnel
. Staf

f i s notifie dwhe n asecon dpump start s i n P S No
. 1 indicatin g increase dflo w t o th e pumpin g system . A n alar mwil l soun di n th e spil l tunne l at 0. 6 mo f wate r depth an dprocedure s t o start shuttin g th e mil l dow n wil l b e commenced
. Th e wastewate r fro mproductio n processes , pump statio n operation , an dwastewate r treatmen t

processe s are monitore db y level s an d instantaneou s an dtota l flo w fro macontro l pane l i n th e boile r house
. Th e spil l tunne l ca n stor e u p t o 300,00 0 gallon s o f

wate r befor e overflowin g t o th e river
. Th e mai n advantag e o f th e spil lPermi t Evaluation Repor

t Blu e Heron Pape

r Compan y tunne l an dth e contro l syste mi s to provid e tim e t o tak e correctiv e actio n befor e areleas e t o th e rive r migh t occur . Thi s capabilit y wa s no t availabl e prio r

to 1993
. Overall , th e facility ha s bee n ver y responsiv e t o reportin g an dtakin g actio n o n spills
. 2. 5 Samplin g Procedure s Blu e Hero n use s a n ISC O sample r o n Outfal l No
. 00 1 to collec t discret e grab sample s fromth e effluent o n ase t schedule
. Th e sample r

discharge s to alarg e plasti c carbo y ove r a2 4 hou r

perio d combinin g th e grab sample s t o represen t th e require dcomposit e sample
. 2. 6 Undergroun d Injectio n Contro l Ther e ar e n o undergroun dinjectio n contro l activitie s a t thi s facility
. 2. 7 Wastewate rCharacteristic s Th e 200 1 NPDE S permi t require dBlu e Hero n t o monito r flow , BOD , color , mercury , cadmium , copper , lead , zinc , bacteria , temperature , turbidity , TS S an dp H discharge dfromoutfal l 001
. Fo r outfal l 002 , filter

backwas h effluent , flow , TS S an dp H wer e require dt o b e monitored
. Fo r outfall s 003 , 00 4 an d005 , flow , temperature , TSS , p H an doi l & greas e wer e require dt o b e monitored
. Sinc e 2001 , Blu e Hero n ha s institute dsevera l managemen t practice s whic h resulte di n a reductio n o f

flow , temperatur e an dloadin g to an dfromth e aerate dsettlin g basi n (ASB)
. Dat a prio r to thi s perio dma y no t

b e representativ e o f

curren t discharg e conditions
. Discharg e monitorin g dat acollecte dove r th e pas t thre e year s wer e use dto characteriz e effluent flow , turbidity , temperature , BO D an dTS S level s i n outfal l 00 1 discharges. Tabl e 1 , below , present s averag e an d95 t hpercentil e value s for flow , BOD , an dTS S for outfal l 001
. Tabl e 2 present s th e averag e an d95 t hpercentil e value s for flo w an dTS S for

outfal l 002
. Effluent

level s o f othe r pollutant s o f

concer n an dfor

outfall s 003 , 00 4 an d00 5 are discusse di n sectio n 7.0 , Wate r Qualit y Analysis
. TABL E 1 : PROCES S WASTEWATE RCHARACTERISTIC S (OUTFAL L 001 ) Paramete r Flo w BO D TS S Averag e 8. 6 MG D 5 5 mg/l 8 7 mg/l 95 t h percentil e 9. 7 MGD 8 4 mg/l 12 8 mg/l TABL E 2 : FILTE RBACKWASHWATE RCHARACTERISTIC S (OUTFAL L 002 ) Paramete r Flo w TS S Averag e

0.5 9 MG D 18 9 mg/l 95 t h percentil e 0.6 1 MGD 35 8 mg/l



## 8Permi t Evaluation Repor

t Blu e Heron Pape

r Compan y

3. 0 Wate rQuality Issue s 3. 1 Applicabl e Wate rQuality Standard s Th e applicabl e wate r

quality standard s ar e foun di n Orego n Administrativ e Rul e (OAR ) 340-041
. The y ar e intende dt o b e protectiv e o f th e beneficia l use s for

th e basin , whic h includ e domesti c wate r supply , industria l wate r

supply , irrigation , livestoc k watering , anadromou s fis h passage , residen t fis h an daquati c life , salmoni dspawnin g an drearing , wildlife , hunting , fishing , boating , wate r contac t recreation , aestheti c quality , an dcommercia l navigatio n an dtransportation
. A summary o f

selecte dwate r

qualit y standard s for

th e Willamett e Rive r

ar e presente di n Tabl e 3
.
TABL E 3 SUMMAR Y O F SELECTE D WILLAMETT E RIVE RWATE RQUALIT Y CRITERIA * Paramete r Dissolve dOxyge n (OA R340-041-0016 ) Temperatur e (OA R340-041-0028 ) p H (OA R340-041-0021 ) Turbidity (OA R340-041-0036 )
Tota l Dissolve dSolid s (OA R340-041-0032 ) In-strea m Wate rQuality Criteri a Coo l Wate rAquati c Lif e Criteri a (applie s i n summer) : > 6. 5 mg/L (absolut e minimu mfor surfac e samples )
Th e 7-da y averag e maximu mtemperatur e o f astrea m identifie da s amigration corrido r may no t excee d2 0 ° C (6 8 °F ) - Insignifican t

anthropogeni c input s ar e allowed
. > 6. 5 an d< 8. 5
N o mor e tha n ate n percen t cumulativ e increas e i n natura l streamturbiditie s shal l b e allowed , a s measure drelativ e t o a contro l poin t

immediatel y upstrea mo f th e turbidity causin g activity
. Th e concentration s liste dbelo w may no t b e exceede dunles s otherwis e specificall y authorize db y DE Q - 100 mg/L
* Note : Th e ful l texts o f th e criteri aar

e available onlin

e at : www.deq.state.or.us/wq/wqrules/wqrules.ht m
3. 2 Wate rQuality Criteri a fo rToxi c Substance s Table s 20 , 30 A an d30 B o f OA R340-04 1 specif

y wate r qualit y criteri afor

toxi c substances
. Th e wate r quality criteri afor

severa l metal s are base do n hardness
. Fo r th e Willamett e River , a hardnes s o f

2 5 mg/L wa s use dt o calculat e wate r quality criteri afor

hardnes s dependen t

metals
. Wate r qualit y criteri afor

th e protectio n o f

freshwater

aquati c lif

e for selecte dtoxi c constituent s ar e give n below :



## 9Permi t Evaluation Repor

t Blu e Heron Pape

r Compan y
TABL E 4 WATE RQUALIT Y CRITERI A FO RTOXI C SUBSTANCE S
Paramete r Aluminum a Bariu m Cadmiu m Coppe r Iro n Lea d Mercury Nicke l Zin c Uni t

Ug/ L Ug/ L Ug/ L Ug/ L Ug/ L Ug/ L Ug/ L Ug/ L Ug/ L Criteri a fo rProtectio n o f Freshwate rAquati c Lif e Acut e 75 0 N/ A b 0. 9 b 5.1 6 N/ A b 15.7 5 2. 4 b 46 9 b 38. 6 Chroni c 8 7 N/ A b 0.4 1 b 3.8 6 100 0 b 0.6 1 0.01 2 b 5 2 b 34.9 5

aPropose dcriteria
. p H an dhardnes s dependen t criterio n b Hardnes s dependen t

criteria
. A hardnes s o f 2 5 mg/L wa s use dfor th e Willamett e River
.

3. 3 303(d ) Listin g Statu s Sectio n 303(d ) o f

th e Clea n Wate r

Ac t require s eac h stat e t o develo p alis t o f wate r bodie s that

d o no t mee t stat e surfac e wate r

qualit y standard s after

implementatio n o f

technology-base dcontrols
. Th e stat e i s the n require dt o complet e aTota l Maximu mDail y Loa d(TMDL ) progra mfor wate r bodie s o n th e 303(d ) list
. Th e TMD L progra mmus t addres s wate r

qualit y o n abasin-wid e scal e t o ensur e that

overal l wate r

quality standard s wil l b e met . Th e Clea n Wate r Ac t prohibit s ne w o r increase ddischarge s unti l aTMD L ha s bee n establishe dfor 303(d ) wate r

bodies , unles s th e discharg e doe s no t

contribut e pollutant s that caus e th e strea mto violat e wate r qualit y standards
. Blu e Hero n discharge s wastewate r t o th e portio n o f

th e Willamett e Rive r

that i s liste da s bein g wate r qualit y limite di n th e Department' s 200 2 303(d ) lis t o f streams . Tabl e 5 include s th e parameter s for

whic h wate r

quality standard s i n th e Willamett e Rive r are no t me t an dth e seaso n whe n standard s ar e exceeded :



## 1 0Permi t Evaluatio n Report Blu e Hero n Pape r

Compan y

TABL E 5 : 200 2 303(D ) LISTIN G INFORMATIO N Strea m Segmen t

Willamett e Rive r (RM 24. 8 t o 54.8 ) Paramete r Aldri n Bacteri a(fecal coliform ) Biologica l Criteri a DD T & DD E (DD T metabolite ) Dieldri n Iro n Mercury Polychlorinate dBiphenyl s (PCBs ) Temperatur e Seaso n Year-aroun d Fall/Winter/Sprin g Year-aroun d Year-aroun d Year-aroun d Year-aroun d Year-aroun d Year-aroun d Summe r
Th e TMD L for

th e Willamett e Rive r

i s schedule dt o b e complete di n mi dt o lat e 2006
. A s par t o f thi s permi t

renewal , th e Departmen t wil l evaluat e th e potentia l for th e discharg e fromBlu e Hero n t o contribut e pollutant s i n th e 303(d ) list
. 3. 4 Threatene d & Endangere d Specie s Specie s o f

anadromou s salmonid s that us e th e lowe r

Willamett e Rive r

nea r th e Blu e Hero n site includ e chinoo k

salmo n (Oncorhynchus tshawytscha), coh o salmo n (O. kisutch), steelhea dtrou t (O. mykiss), an dcutthroa t trou t (O. clarki). Residen t

salmoni dgam e specie s includ e cutthroa t trout . Bul l trou t

d o no t occu r i n thi s are ao f

th e Willamett e River
. O n Marc h 16 , 1999 , th e Nationa l Marin e Fisherie s Servic e (NMFS ) liste dchinoo k salmo n i n th e Lowe r Columbi aRive r

Evolutionar y Significan t Uni t (ESU ) a s athreatene dspecie s unde r th e Endangere dSpecie s Ac t

(ESA)
. O n Marc h 13 , 1998 , NMF S liste dth e Lowe r Columbi aRive r ES U steelhea dtrou t

stock s a s athreatene dspecie s unde r th e ESA
. Thes e specie s utiliz e th e Willamett e Rive r

an dit s tributaries
. Th e Willamett e Rive r ha s bee n designate da s critica l habita t for liste dchinoo k

salmo n an dsteelhea dtrou t b y th e NMFS
. Th e Willamett e Rive r

near Blu e Hero n contain s littl e in-strea mhabita t diversity an dha s a substrat e primaril y compose do f san dan dsilt
. Therefore , thi s are ao f th e Willamett e Rive r

doe s no t provid e spawnin g habita t for salmonids
. Th e Willamett e Rive r nea r Blu e Hero n i s primaril y use db y salmonid s for

upstrea man ddownstrea mmigrator y purposes , althoug h som e rearin g an d feedin g activitie s b y juvenile s likel y occu r durin g thei r

downstrea mmigration
. Anadromou s salmonid s ca n typicall y b e foun di n th e Willamett e Rive r nea r Blu e Hero n throughou t

th e yea r a s indicate di n Figur e 3 , "Anadromou s Specie s Us e an dTimin g i n th e Willamett e Rive r near Portland , Oregon"
.



## 1 1Permi t Evaluatio n Report Blu e Hero n Pape r

Compan y

Willamett e Rive r(Mout h t o Willamett e Falls ) Specie s Freshwat e

Lif e phas e Spri n Upstrea m Migratio n Chinoo k Salm o Juvenil e Outmigrati o Fal l Upstrea m Migratio n Chinoo k Salm o Juvenil e Outmigratio r Coh o Salm o Upstrea m Migratio n

Juvenil e Outmigratio r Summ e Upstrea m Migratio n Steelhea d Trou t Juvenil e Outmigratio r Wint e Upstrea m Migratio n Steelhea d Trou t Juvenil e Outmigratio r Sea - Upstrea m Migratio n Cutthroa t Trou t KeltOutmigratio n

Juvenil e Outmigrati o Lif e Stag e Presenc e ea k Activit y es s tha n Pea k

Activit y

FIGUR E 3 : ANADROMOU S SPECIE S US E AN D TIMIN G I N TH E WILLAMETT E RIVE R NEA RPORTLAND , OREGO N Althoug h different

juvenil e salmoni dspecie s emigrat e a t different time s o f th e year , i n genera l ther e i s apeak

outmigratio n i n th e sprin g an dasmalle r peak i n th e fall
. Dat afromth e Portlan d Genera l Electri c (PGE ) Sullivan Da melevato r stud y (PGE , 1999 ) at

Willamett e Fall s show s emigratio n time s o f

juvenil e salmonid s typicall y occurrin g frommi dFebruary throug h Jun e wit h asmalle r secondary peak

o f sprin g chinoo k

salmo n i n Octobe r

throug h mid-Novembe r

(Figur e 4)
.



## 1 2Permi t Evaluatio n Report Blu e Hero n Pape r

Compan y •-Wld^Qi n HatchSpCh n •A
- •• - Wl d SBfr i —• —Hatc h SHh d Coh o • • • Fal l Chi n

Jar

. Feb

. Marc

h /Apri l Ma

yJur e JUyAj g Sept Oi

. Nfc yDec Sem-MrtlyFterio d 

### Figur e 4 : Juvenil e Salmoni d Migratio n Timin g a tSulliva n Da m (Willamett e Falls )

3. 5 Mixin g Zone s (MZ ) an dZone s o f Initia l Dilutio n (ZID ) OA R340-041-005 3 provide s that th e Departmen t

ma y suspen dal l o r

part o f th e wate r qualit y standard s i n adesignate dportio n o f th e receivin g wate r

to serv e a s azon e o f

dilutio n for

waste s an dreceivin g water s t o mi x thoroughly
. Wate r quality standard s for

al l parameter s mus t

b e me t at th e edg e o f

th e define dmixin g zone . 3.5. 1 Mixin g Zone s Outfal l 00 1 Outfal l 00 1 consist s o f

a n approximatel y 15 2 mete r (500-ft. ) long , burie d24-inc h concrete-coate d stee l pip e extendin g approximatel y 107 m . (35 0 ft. ) fro mth e wes t ban k o f th e Willamett e Rive r nea r rive r mil e 27. 8 (Figur e 5)
. A diffuser consistin g o f

eigh t 8-inc h port s i s sprea dove r th e las t 3 2 m . (10 5 ft. ) o f

th e outfall
. Th e port s ar e a t an angl e o f

1 5 degree s abov e th e horizonta l an dat a 45 ° angl e relativ e t o th e ambien t current , oriente dawa y fromth e wes t bank
. Th e port s ar e locate dapproximatel y 0. 6 m( 2 ft. ) abov e th e rive r bottom
. Th e widt h o f

th e rive r unde r low

flo w condition s nea r

th e discharg e locatio n i s 29 0 m . (95 0 ft. ) with an averag e depth o f approximatel y 2 5 feet

an damaximu mdepth o f 10. 4 m . (3 4 ft.)
. Th e loca l wate r dept h at th e Blu e Hero n diffuser

a t low-flo w i s approximatel y 9. 8 m . (3 2 ft.)
. Th e Departmen t

previousl y establishe dtw o mixin g zone s for outfal l 001
. On e mixin g zon e wa s establishe dprio r

t o th e 200 1 permi t

an di s use dfor

al l parameter s regulate db y th e previou s permit
. Th e secon dmixin g zon e wa s establishe db y th e 200 1 permi t an di s specificall y for temperatur e an dturbidity
. 

## 1 3Permi t Evaluatio n Report Blu e Hero n Pape r

Compan y

Wes t Lin n Pape rCo. \

Wes t Lin n Pape rAS B WES T LIN N Blu e Hero n Pape rAS B Blu e Hero n Pape r

OREGO N CIT Y

Wes t Lin n Pape r Outfal l an d Diffuse r

Blu e Hero n Pape r Outfal l an d Diffuse r
Figur e 5 : Detaile d locatio n of Outfal l 00 1 (Fro m 10/0 2 B H Dilutio n Study ) Temperatur e an dTurbidit y Mixin g Zon e Th e temperatur e an dturbidity mixin g zon e i s define da s that portio n o f

th e Willamett e Rive r withi n arectangl e wit h alength no t t o excee d7 5 mdownstrea mfromth e longitudina l centerlin e o f th e diffuser

pip e an dawidt h o f

11 5 m . Th e wes t

sid e o f th e rectangl e shal l b e 4 6 mfromth e cente r o f th e diffuse

r an dth e eas t

sid e o f th e rectangl e shal l b e 6 9 mfromth e cente r o f th e diffuser
. Th e Department' s primar y reason s for allowin g amixin g zon e o f thi s siz e an dlocatio n are : 1
. Th e mixin g zon e wil l no t overlap with th e mixin g zon e for th e Wes t Lin n Pape r Company , whic h i s approximatel y 60 0 mdownstream ; 2
. Fro mcompute r

modelin g performe dfor

thi s permi t

renewa l (an dbase do n th e Dilutio n Performanc e Fiel dVerificatio n & Modelin g Study prepare db y CH2MHil l for Blu e Hero n i n 2002) , th e critica l conditio n dilutio n a t 30 0 meter s downstrea mfromth e diffuse r i s approximatel y 127
. Therefore , th e effluent fromBlu e Hero n i s actuall y dilute dt o les s tha n 1 percen t well befor e i t

reache s th e Wes t

Lin n Pape r

Compan y mixin g zone ; 3
. Completio n o f

initia l dilutio n wil l occu r withi n th e propose dmixin g zone ; 4
. A zon e o f

a t leas t 4 7 mwid e wil l b e allowe dalon g bot h bank s o f th e rive r t o avoi d impac t o n aquati c lif

e (fisherie s agencie s hav e previousl y indicate dthat smalle r juvenil e salmonid s ma y migrat e withi n 4 6 mo f th e ban k a t adepth o f

approximatel y 5. 5 m.) ; 5
. Th e streamwidth o f

th e Willamett e Rive r

at 7Q1 0 lo w flo w wher e Blu e Hero n discharge s i s approximatel y 29 0 meters . Thus , th e define dmixin g zon e occupie s les s tha n 40 % o f

th e widt h o f

th e Willamett e Rive r

a t lo w flo w an dwil l occup y les s at highe r flows ; 6
. A Biologica l Criteri aStudy complete db y consultant s for Blu e Hero n i n th e are ai n an d aroun dth e mixin g zon e foun dthat ther e i s n o criticall y importan t habitat , suc h a s cold

wate r refugia , withi n th e stud y area ; an d 7
. Base do n th e abov e information , th e Departmen t consider s that

th e mixin g zon e wil l b e a smal l a s feasible
. 

# 1 4Permi t Evaluation Repor

t Blu e Heron Pape

r Compan y I n addition , critica l conditio n mixin g zon e analyse s indicat e tha t th e effluent

plum e wil l no t

b e botto mattached
. Thi s i s du e t o th e locatio n an dorientatio n o f th e diffuser

port s an dth e buoyan t natur e o f th e discharge
. Figur e 6 , below , give s agraphica l presentatio n o f outpu t fromth e calibrate dcompute r

modelin g for

critica l conditions
. Th e botto mo f th e rive r a t thi s locatio n (an d thi s flow ) i s at

a n approximat e depth o f

9. 8 meters .

1

2

3 -

4 | 5
o

6

7

8

9

C Blu e Hero n Plum e Elevatio n



### mm~^-

1 ; ' \

•

3 A •' •

5 E 7 E t S

1 loriz

. Distanc e 0

1 1 1 m m Sourc e (m ; 2 1 3 1 1 1 5 1 6 1 7 1 8 1 9 2 —Centerlin e

, Plum e Bndry

0 Figur e 6 : Visua l Plume s Graphica l Outpu tof th e Plum e Elevatio n fo rOutfal l 00 1 I t shoul db e note dthat

sinc e th e 200 1 permi t

wa s issued , ne w "Temperature Thermal Plume Limitations"

hav e bee n establishe dunde r Orego n Administrativ e Rul e (OAR ) 340-041-005 3 - Mixing Zones. Complianc e with thi s rul e i s analyze di n Sectio n 7
. Blu e Hero n conducte damixin g zon e stud y to determin e mixin g characteristic s an davailabl e dilutio n for

th e temperatur e an dturbidity mixin g zone . Th e result s o f th e mixin g zon e stud y ar e presente di n th e Dilution Peformance Field Verification & Modeling Study b y CH2MHU 1 (Octobe r 14 , 2002)
. Th e mixin g zon e stud y consiste do f afiel ddy e stud y an ddischarg e modelin g usin g severa l models
. Th e modelin g indicate dthat th e Visua l Plume s modelin g packag e mor e closel y matche dth e result s o f th e fiel ddy e study
. Therefore , th e Visua l Plume s modelin g packag e wa s use dfor scenari o modeling
. A variety o f discharg e an dambien t

rive r condition s wer e modeled
. Th e Octobe r

200 2 dilutio n stud y wa s reviewe db y th e Departmen t an dapprove ddilution s wer e give n i n aDepartmenta l lette r to Blu e Hero n date dFebruary 27 , 2003
. Th e approve dpredicte d dilution s at

th e edg e o f

th e mixin g zon e for

critica l chronic discharg e condition s are : May/Jun e period

- 100 ; July/Aug
. perio d- 90 , an dSept./Oct
. perio d- 102
.



## 1 5Permi t Evaluation Repor

t Blu e Heron Pape

r Compan y Mixin g Zon e for

Parameter s Othe r

Tha n Temperatur e an dTurbidit y Th e secon dmixin g zon e for Outfal l 00 1 i s for

al l regulate dparameter s othe r tha n turbidity an d temperature . Th e mixin g zon e wa s define di n th e previou s permi t a s tha t portio n o f

th e Willamett e Rive r

withi n 15. 2 meter s o f

th e poin t o f discharge
. Sinc e th e effluent

plum e doe s no t

exten dupstrea mo f

th e diffuser , thi s mixin g zon e ha s bee n modifie dt o includ e onl y tha t portio n o f

th e rive r downstrea mo f

th e diffuser
. Thi s wil l allo w for amixin g zon e wit h awidt h o f 62. 4 man dalength o f

15. 2 m . Th e Department s primary reason s for allowin g amixin g on e o f thi s siz e ar e th e sam e a s thos e note dfor th e temperatur e an d turbidity mixin g zon e give n above
. Thi s mixin g zon e i s smalle r becaus e anee dfor

alarge r mixin g zon e ha s no t

bee n demonstrated
. Base do n th e modelin g result s fromth e dilutio n stud y mentione dabove , calculate dminimu m dilutio n for

thi s mixin g zon e i s 70
. Outfal l 00 2 Intermitten t

discharge s o f

filter plan t wastewate r

currentl y occu r

throug h outfal l 002
. Th e outfal l consist s o f

asingl e 1 8 inc h port

that discharge s a t

an approximat e depth o f

5 4 feet at alocatio n nea r th e mil l downstrea mo f

th e Willamett e Fall s at

approximat e rive r

mil e (RM ) 26.0
. Th e regulator y mixin g zon e wa s establishe dfor outfal l 00 2 unde r

th e previou s permi t

an di s define d a s that portio n o f

th e Willamett e Rive r

withi n 1 0 mo f

th e cente r

o f th e diffuser
. A n estimat e o f th e dilutio n at

th e mixin g zon e boundar y wa s achieve dthroug h compute r modelin g (usin g CORMI X - graphica l outpu t presente di n Figur e 7)
. Th e estimate ddilutio n a t th e mixin g zon e boundar y for

th e critica l low-flo w perio d(7Q10 ) i s 14
. Th e propose dpermi t include s th e requiremen t

(describe dbelow ) to eliminat e al l discharge s fro mthi s outfal l with th e exceptio n o f thos e compose dsolel y o f rive r water .

Figur e 7 : Outfal l 00 2 Modele d Plum e wit h Downstrea m M Z Boundar y (1 0 meters )



## 1 6Permi t Evaluatio n Report Blu e Hero n Pape r

Compan y Outfall s 003 , 00 4 & 00 5 A s note dabove , outfall s 003 , 00 4 an d00 5 discharg e infrequentl y an donl y a t very hig h rive r stages/flows
. Th e regulator y mixin g zone s wer e establishe dfor outfall s 003 , 00 4 an d00 5 unde r th e previou s permi t

an dar e define da s thos e portion s o f th e Willamett e Rive r

extendin g 3 m towar dth e cente r

o f th e rive r an dextendin g 1 0 mdownstrea mo f th e junctio n o f

th e respectiv e tailrac e an dth e rive r

bank
. 3.5. 2 Zon e o f

Immediat e Dilutio n A zon e o f immediat e dilutio n (ZID ) withi n th e mixin g zon e for outfal l 00 1 ha s bee n establishe d a s allowe db y OA R340-041-0053(2)(a)(A)
. Complianc e wit h acut e toxicity standard s mus t b e me t at th e edg e o f

th e ZID
. A Zon e o f

Immediat e Dilutio n (ZID ) wa s previousl y establishe dfor th e Blu e Hero n discharg e at Outfal l 00 1 an di s define da s th e zon e withi n aradiu s o f 6. 8 mfrom th e cente r o f eac h diffuse

r port . Th e establishmen t

o f thi s ZI D wa s base do n EP A guidanc e (Technica l Support Documen t

for Wate r Quality-Base dToxic s Control , 199 1 [TSD] ) o n selectin g th e siz e o f ZIDs
. Th e diffuser , wit h an initia l velocit y o f greate r tha n 3 m/s , i s considere dahig h velocit y discharge
. Th e TS D indicate s that

for hig h velocit y discharge s th e acut e toxicity criteri a(o r criteri amaximu m concentratio n - CMC ) wil l b e me t withi n afew minute s unde r practicall y an y condition s with a ZI D o f 5 0 time s th e discharg e length scale
. (Th e discharg e length scal e i s define da s th e squar e roo t o f th e cross-sectiona l are ao f an y discharg e pipe. ) Th e diamete r o f th e diffuse

r port s i s approximatel y 15 0 mm , whic h result s i n aZI D o f 6. 8 m . Thi s wil l ensur e th e acut e criteria , i f me t at th e edg e o f

th e ZID , wil l expos e driftin g organism s to acut e pollutan t concentration s for

a fa r shorte r tim e tha n th e toxicity standard s allow
. (Th e acut e toxi c criteri aar e designe dt o protec t organism s at

exposure s o f

on e hou r o r less. ) Th e ZI D for

outfal l 00 1 i s define da s that portio n o f

th e regulator y mixin g zon e withi n 6. 8 mo f th e cente r o f eac h diffuser

port . Sinc e bot h mixin g zone s for outfal l 00 1 ar e define da s aportio n o f th e rive r downstrea mo f

th e diffuser , th e ZI D als o onl y extend s downstream
. Th e Octobe r

200 2 dilutio n stud y reference dabov e gav e predicte ddilution s at th e edg e o f

th e ZID
. Th e approve dpredicte ddilution s at th e edg e o f

th e ZI D for

critica l acut e discharg e condition s are : May/Jun e period

- 35 ; July/Aug
. perio d- 33 , an dSept./Oct
. perio d- 35
. 3. 6 Antidegradatio n Revie w Th e Department' s antidegradatio n polic y i n OA R340-041-000 4 require s that arevie w o f discharge s t o surfac e water s b e conducte dt o ensur e that existin g wate r

quality i s no t

lowere d unles s ther e are n o reasonabl e alternative s availabl e an dth e lowerin g o f wate r quality i s necessar y for

economi c an dsocia l benefit
. Th e NPDE S permi t

for Blu e Hero n i s apermi t

renewa l with n o increas e i n discharg e loa d(i n fact , thi s permi t

wil l resul t

i n substantia l reduction s i n discharg e load)
. Permi t renewal s wit h n o increas e i n discharg e loa dar e no t considere dt o lowe r

wate r quality fromexistin g wate r quality
. Thus , th e Departmen t

find s that

th e discharg e i s no t

subjec t t o a n in-depth antidegradatio n review
. (Antidegradation Policy Implementation Internal Management

Directive for NPDES Permits and

Section 401 Water

Quality Certifications, ODEQ March 2001).



## 1 7Permi t Evaluation Repor

t Blu e Heron Pape

r Compan y

4. 0 Existin g Permi tLimit s Existin g Limit s fo rOutfal l 00 1 Th e 200 1 NPDE S permi t include s th e followin g effluent limit s an dnote s for

outfal l 00 1 (fro m Schedul e A
. 1.)
. TABL E 6 : EXISTIN G EFFLUEN T LIMIT S A T OUTFAL L 00 1 - PAR T 1 Outfal l 00 1 Aerate d Stabilizatio n Basi n Effluen t Paramete r

flo w BOD 5 BOD 5 TS S (Not e 1 ) temperatur e (Not e 2 ) E. coli bacteri a (Not e 3 ) turbidity turbidity zin c p H Seaso n

Ju n 1 -Se p 3 1 Junl-Oct3 1 No v 1 -Ma y 3 1 Ja n 1 - De c 3 1 Loading s Monthl y Averag e

~ 362 5 kg/ d 427 5 kg/ d 552 5 kg/ d Dail y

Maximu m

~ 435 0 kg/ d 680 0 kg/ d 1027 5 kg/ d Maximu m

7-Day Movin g Averag e 0.46 0 m 3 / s ~ ~ ~ Se e Conditio n A 8 Ja n 1 -De c 3 1 May 1 -Oc t

3 1 No v 1 - Ap r

3 0 Ja n 1 - De c 3 1 Ja n 1 - De c 3 1 126/10 0 mL 4 0 NT U 11 5 NT U

— 406/10 0 m L

~ ~ 5 0 kg/ d ~

7 0 NT U 20 0 NT U
~ shal l b e withi n th e rang e o f 6. 0 t o 8. 5 Notes for Condition Al

(Outfall 001): 1. During periods when dredging is conducted in accordance with an approved Dredging Project Management

Plan, effluent

limitationsfor

TSS shall be as specified

in the approved plan. 2. The temperature effluent limitations are set

forth in Condition A8and will vary based

on the Temperature Management Plan as described

in Condition A8. 3. Monthly limitation shall be calculated

as 30-day log mean. If

the daily maximum is exceeded in any month, the permittee may take at least five consecutive re-samples at four-hour intervals beginning no later than 28hours after

the original

sample was taken, or

4 hours after the permittee is notified

of the exceedence if

notification was made more than 28hours after the original

sample was taken. If

the log mean of

the five or more re-samples is less than or equal to 126/100mL, no violation of the daily maximum shall be deemed

to have occurred. For

a month in which an exceedence of the daily maximum occurred and the permittee performed

re-sampling, the re-samples shall replace the exceedence sample in calculating the monthly average, if the log mean of

the re-samples is less than or equal to 126/100mL. If

the log mean of

the re-samples is greater than 126/100mL, then the monthly average shall

be calculated

as a log mean of

all samples for the month.



## 1 8Permi t Evaluation Repor

t Blu e Heron Pape

r Compan y I n addition , Schedul e A 8 o f th e 200 1 permi t

include drequirement s pertaining to atemperatur e managemen t

pla n an dtemperatur e effluent limit s relate dto outfal l 001
. Schedul e A 8 o f th e 200 1 permi t i s give n below
. A8Temperature Management Plan The effluent

limitations and

other conditions in this permit

related to temperature shall

constitute the surface water

temperature management plan (temperature management plan) required

by OAR 340-41-0026(3)(a)(D) applicable to the permittee. Provided that the permittee complies with this temperature management plan, the permittee shall

be deemed

to be in compliance with the state temperature water quality standard

and not be deemed

to be causing or

contributing to a violation of

the water quality standardsfor

temperature, not

withstanding Condition A6 (Mixing Zones and

Dilutions Defined). Temperature Effluent

Limits and

Heat Load Reduction Program: The permittee shall reduce the effluent temperature and

heat load discharged

from Outfall

001 according to the schedules given in Tables A8-1 and

A8-2:



## 1 9Permi t Evaluatio n Report Blu e Hero n Pape r

Compan y
TABL E 7 : EXISTIN G EFFLUEN T LIMIT S A T OUTFAL L 00 1 - PAR T 2

Temperatur e an d Exces s Hea tLoa d Limitation s

Januar y 1 - Decembe r3 1 Effectiv e Dat e Upo n Issuanc e 2 4 month s after issuanc e 4 8 month s after issuanc e

Upo n Issuanc e Temperatur e Limitation s

Maximu m7-Day Averag e Effluent Temperatur e After

Effectiv e Dat e ° C 33. 8 33. 0 3 0 Maximu mMonthl y Averag e

Effluent Temperatur e After

Effectiv e Dat e ° C 32. 2 29. 9 27. 2 Exces s Hea tLoa d Limitation s Maximu m7-Da

y Averag e Exces s Hea t Loa dDischarge dAfter Effectiv e Dat e M W 31. 6 Maximu mMonthl y Averag e Exces s Hea t Loa dDischarge dAfter Effectiv e Dat e M W 27. 2 Relativ e Hea tLoa d Limitations Effectiv e Dat e
Upo n Issuanc e 2 4 month s after issuanc e 4 8 month s after issuanc e Upo n Issuanc e 2 4 month s after issuanc e 4 8 month s after issuanc e Upo n Issuanc e 2 4 month s after issuanc e 4 8 month s after issuanc e Maximu m7-Day Averag e Effluent

Temperatur e After

Effectiv e Dat e M W Monthl y Averag e Relativ e Hea t

Loa dDischarge dAfter

Effectiv e Dat e M W Ma y 1-Jun e 3 0 24. 9 22. 9 19. 9 21. 5 19. 5 16. 5 Jul y 1 - Augus t3 1 22. 5 20. 5 17. 5 18. 6 16. 6 13. 6 Septembe r1 - Novembe r3 0 24. 4 22. 4 19. 4 20. 8 18. 8 15. 8



## 2 0Permi t Evaluation Repor

t Blu e Heron Pape

r Compan y The heat load discharged

shall be calculated

using the following formula: f H'=p C

p Q(AT) f L 100 0 V nr J , J V s J f \MW^

where: FT = heat load discharged

(see below

for definition of

relative and

excess) p= density of

water, 1.0kg/L C p = specific heat

of water, 4182 J/(kg»°C) Q = effluent

flowrate in cubic meters per second (m 3 /s) AT = difference in temperature between effluent temperature and

stipulated

condition (see below for definition of

relative and

excess) Heat load is stipulated

as relative or

excess, as defined

below. Relative heat

load for each day shall be determined

by subtracting average ambient intake water

temperature

from the average effluent temperature

for that day. Excess heat

load for each day shall

be determined

by subtracting a water

quality standard

criterion (20°C) from the average effluent temperature for that day. The water

quality standard

criterion for

the period

July 1 to September

15shall be 20°C. Heat loads shall

be calculated

on a daily basis. The 7-day moving average heat load shall be calculated

as the 7-day moving average of the calculated

heat load for the individual

days. The monthly average heat

load shall be calculated

as the monthly average of the heat load for the individual days of each calendar

month (or

period if less than a

full month). If

a calculation results in a heat

load value of less than zero, the result

shall be recorded

as zero. Individual values of zero shall

be included

in calculating average values. Seven-day moving averages shall be reset on May 1 annually. The seven-day moving average for the first six

days of the season beginning July 1 shall

be subject

to the heat-load

limitsfor the preceding season. In any designated

period (7-day, month), if

the temperature effluent

limit has been achieved, the permittee shall

be deemed

in compliance with this condition without consideration of

relative heat load. In any designated

period, if

the effluent

temperature limit

has been exceeded

but the relative heat

load limitation has not

been exceeded, the permittee shall be deemed

in compliance with this condition. Otherwise the permittee shall be deemed

out of compliance with this condition for

the designated

period. Existin g Limit s fo rOutfal l 00 2 Th e 200 1 NPDE S permi t include s th e followin g effluent limit s an dnote s for

outfal l 00 2 (fro m Schedul e A.2)
.

TABL E 8 : EXISTIN G EFFLUEN T LIMIT S A T OUTFAL L 00 2 Outfal l 00 2 Filte rPlan tBackwas h Effluen t Paramete r p H Limitation s shal l b e withi n th e rang e o f 5. 5 to 8. 5



## 2 1Permi t Evaluatio n Report Blu e Hero n Pape r

Compan y Existin g Limit s fo rOutfal l 003 , 004 , 00 5 Th e 200 1 NPDE S permi t include s th e followin g effluent limit s an dnote s for

outfal l 00 2 (fro m Schedul e A.3)
. TABL E 9 : EXISTIN G EFFLUEN T LIMIT S A T OUTFAL L 003 , 00 4 & 00 5 Outfall s 003 , 004 , an d 00 5 Miscellaneou s Effluent s Paramete r oi l & greas e (individua l outfalls ) p H (individua l outfalls ) temperatur e (individua l outfalls )
visibl e discharg e event s (individua l outfalls ) Loading s Dail y Maximu m 1 0 mg/L Limitation s shal l b e withi n th e rang e o f 6. 5 t o 8. 5 pump seal wate r

an dcompresso r

coolin g wate r

shal l no t b e discharge dat

an y tim e that

th e ambien t

rive r temperatur e exceed s 2 0 ° C shal l no t excee d8 event s pe r

calendar yea r for al l outfall s combine dan d8 hour s duratio n for an y even t Othe rExistin g Limit s fo rAl l Outfall s Th e 200 1 NPDE S permi t als o include s th e followin g effluent limit s for

combine dTS S loading s fromal l outfall s (fro mSchedul e A.4)
.

TABL E 10 : EXISTIN G EFFLUEN T LIMIT S - COMBINE D TS S

Outfall s 001 , 002 , 003 , 004 , an d 00 5 Combine d Tota l o f

Al l Effluent s Aerate d Stabilizatio n Basi n Effluen t Paramete r TS S (combine d total ) Seaso n

Ja n 1 - De c 3 1 Loading s

Monthl y Averag e 685 5 kg/ d Dail y Maximu m 1317 5 kg/ d

5. 0 Technolog y Base d Limit s Developmen t

o f effluent limitation s for

asurfac e wate r

discharg e involve s firs t

determinin g applicabl e technolog y base dlimit s an dthe n determinin g wate r quality base dlimits
. Th e NPDE S permi t contain s th e mor e stringen t o f th e tw o limits
. Th e U.S
. Environmenta l Protectio n Agenc y (EPA ) ha s develope deffluent limitatio n guideline s (ELGs ) for

man y type s o f

industries
. Th e ELG s ar e typicall y expresse di n term s o f mas s o f a particular pollutan t allowe dpe r

uni t o f productio n o r

uni t o f flow
. ELG s ar e als o expresse da s concentratio n i n whic h cas e th e productio n i s no t relevant
. I f

ELG s are no t

publishe dfor

a particular industry , DE Q follow s federal guideline s an ddevelop s equivalen t technolog y base d limit s usin g bes t

professiona l judgment
. Fo r existin g poin t

sourc e discharges , ELG s hav e bee n develope dfor thre e categories : Bes t Practicabl e Contro l Technolog y Currentl y Availabl e (BPT) , Bes t Conventiona l Pollutan t

Contro l Technolog y (BCT) , an dBes t Availabl e Technolog y Economicall y Achievabl e (BAT)
. BP T represent s th e minimu mtechnolog y leve l an dapplie s t o al l existin g poin t source s discharge s for whic h ELG s hav e bee n published
. BC T replace s BP T for conventiona l pollutants , an dBA T 

## 2 2Permi t Evaluation Repor

t Blu e Heron Pape

r Compan y replace s BP T for

non-conventiona l an dtoxi c pollutants
. BP T limitation s mus t b e me t upo n publicatio n o f

th e ELGs
. EP A allow s additiona l tim e for facilitie s to compl y with BC T an dBA T limitations
. Blu e Hero n produce s newsprin t an dothe r

pape r grade s usin g bot h dein k

an dthermomechanica l (TMP ) pulps , whic h ar e produce don-site
. Accordingly , discharge s fromth e mil l ar e subjec t t o th e effluent

limit s containe di n 4 0 CF RPart 430 , Subpart s G—Mechanica l Pul p (productio n throug h th e applicatio n o f th e thermomechanica l process ) an dSubpart I—Secondary Fibe r

Deink
. Becaus e th e mil l i s an existin g source , i t i s subjec t to th e "bes t

practicabl e contro l technolog y currentl y available " (BPT ) effluent limit s se t

fort h i n 4 0 CF R§ 430.72(a ) for mill s usin g th e thermomechanica l proces s an di n 4 0 CF R§ 430.9 2 for dein k mills
. Th e "bes t

availabl e technolog y economicall y achievable " (BAT ) limit s unde r 4 0 CF R§ § 430.7 4 an d430.9 4 d o no t appl y to th e mil l becaus e i t doe s no t us e zin c hydrosulfit e a s ableachin g agen t o r chlorophenolic

containin g biocides
.

TABL E 1 1 - TECHNOLOGY-BASE D EFFLUEN T LIMIT S

Technology-Based Effluen tLimit s Productio n (fro m application ) TM P 25 0 Mg/ d (27 5 Tons/d ) Dein k

34 1 Mg/ d (37 5 Tons/d ) Effluen tLimitatio n Guideline s Paramete r BOD5-Monthl y Av g BOD5-Dail y Ma x TSS-Monthl y Av g TSS-Dail y Ma x TM P

kg/M g 5.5 5 10.6 0 8.3 5 15.5 5 Dein k

kg/M g 9.4 0 18.1 0 12.9 5 24.0 5 Effluen tLimitation s Paramete r BOD5-Monthl y Av g BOD5-Dail y Ma x TSS-Monthl y Av g TSS-Dail y Ma x TM P kg/ d 138 8 265 0 208 8 388 8 Dein k

kg/ d 320 5 617 2 441 6 820 1 Tota l

kg/ d 459 3 882 2 650 4 1208 9
Th e categorica l effluent

limit s for

BO D for th e forecas t

productio n level s woul dexcee dth e curren t NPDE S permi t

limit s for thes e parameters . Th e existin g effluent limit s for

BO D canno t

b e increase dto th e calculate deffluent limit s base do n forecaste dproductio n an dth e technology

base deffluent

limitatio n guidelines
. Thi s i s prohibite db y th e anti-backslidin g provisio n o f th e Clea n Wate r

Act , whic h prohibit s subsequen t effluent limitation s that

ar e les s stringen t

tha n th e comparabl e effluent

limitation s i n th e previou s permit
. Th e categorica l effluent limit s for

p H (5. 0 t o 9. 0 standar dunits ) ar e no t production-based
. Th e categorica l effluent limit s for

TS S ar e lowe r tha n th e tota l TS S load s for th e facility (fro mal l outfalls ) allowe dunde r th e 200 1 permit
. Therefore , th e maximu mtechnology-base deffluent limitation s for

conventiona l pollutant s applicabl e t o th e Blu e Hero n facility ar e th e existin g effluent limitation s for

BOD 5 an dpH , an d th e effluent

limitation s for

TS S presente di n tabl e 1 1 for TSS
. Th e BCT limitation s for TM P an d Dein k subcategorie s ar e th e sam e a s th e BP T limitations , s o th e BP T limitation s appl y directly
. Th e BA T limitation s for

pentachlorophenol , trichlorophenol , an dzin c d o no t appl y t o th e Blu e 

## 2 3Permi t Evaluation Repor

t Blu e Heron Pape

r Compan y Hero n facility becaus e thes e chemical s are no t used
. Th e permi t

wil l includ e aconditio n prohibitin g us e o f

pentachlorophenol , trichlorophenol , an dzin c compounds
. Fo r th e filter backwas h discharg e fro mth e wate r treatmen t

plant , ther e ar e n o technology-base d effluent limitations
. 6. 0 Compariso n o f

200 1 Permi tLimit s an d Technology-base d Limit s Thi s sectio n present s acompariso n o f th e 200 1 NPDE S Permi t limit s with th e technology-base d limitation s fro mEPA' s effluent limitatio n guidelines
. Sinc e Blu e Hero n di dno t reques t amas s loa dincrease , th e propose dlimit s t o b e use dfor wate r quality analysi s wil l b e th e mor e stringen t o f eithe r th e 200 1 NPDE S Permi t limit s o r th e technology-base dlimitation s calculate dabove
. Fo r BO D an dTS S at

outfal l 001 , th e 200 1 NPDE S Permi t limit s ar e mor e stringen t tha n th e limit s calculate dusin g th e technology-base dstandards
. However , th e technology-base dlimitatio n for TS S i s mor e stringen t

tha n th e combine dTS S effluent limitatio n for

al l outfalls
. Therefore , th e 200 1 NPDE S permi t

limit s wil l b e use dfor

th e wate r quality analysi s wit h th e exceptio n o f th e TS S effluent

limit s for

th e combine doutfalls , wher e th e mor e stringen t technology-base d limit s wil l b e used
. 7. 0 Wate rQuality Analysi s Thi s sectio n determine s pollutant s o f concern an devaluate s eac h paramete r t o determin e whethe r th e concentratio n o f

th e pollutan t

i n th e discharg e represent s a"reasonabl e potentia l t o exceed " wate r qualit y standards
. I f

th e discharg e concentratio n o f aparticular

pollutan t ha s areasonabl e potentia l t o excee dwate r qualit y standards , the n wate r quality base deffluent

limit s ar e establishe dfor

that pollutant
. T o determin e whethe r th e discharg e ha s areasonabl e potentia l t o excee dwate r

qualit y standard s for

thes e pollutants , aspreadshee t that simulate s th e approac h i n EPA' s Technical

Support Document

for Water Quality Based

Toxics wa s used
. Maximu m effluent concentrations , wate r

quality criteria , an dmixin g zon e dat aare use dt o determin e whethe r th e discharg e ha s areasonabl e potentia l t o excee dwate r qualit y standards
. 7. 1 Pollutants o f

Concer n Usin g effluent

dat afro mdischarg e monitorin g reports , 303(d ) parameters , an dmonitorin g conducte dfor

th e NPDE S permi t

application , th e pollutant s o f concern at

eac h outfal l wer e determined
. Outfal l 00 1 Base do n a n analysi s o f

monitorin g data , th e pollutant s o f concern ar e BOD , TSS , pH , color , temperature , turbidity , aluminum , arsenic , chromium , copper , lead , mercury , nickel , an dzinc
. Analytica l result s for

volatile , semi-volatile , an dbase-neutra l organi c compound s wer e belo w detectio n limits
. Analytica l result s for pesticides/PCB s wer e als o belo w detectio n limits
. Thus , organi c compound s an dpesticides/PCB s ar e no t include da s pollutant s o f concern . Outfal l 00 2 Fo r th e filter backwas h discharge , th e pollutant s o f concern, base do n material s adde dt o th e wate r use dfor backwashin g wate r

a s well a s effluent

monitoring , ar e TSS , turbidity , pH , chlorin e an daluminum
. Outfall s 003 , 00 4 & 00 5 Th e pollutant s o f

concern for

outfall s 003 , 00 4 an d00 5 ar e pH , TSS , oi l & grease , an dturbidity
.



## 2 4Permi t Evaluatio n Report Blu e Hero n Pape r

Compan y 7.1. 1 Dissolve d Oxygen/BO D Th e 200 1 NPDE S Permi t include s abiochemica l oxyge n deman d(BOD ) limi t for th e discharg e fromoutfal l 001
. BO D i s ameasur e o f th e oxyge n deman dexerte db y th e wastewater . BO D can affec t dissolve doxyge n level s i n th e receivin g stream . Dissolve doxyge n analysi s ha s bot h a near-fiel dcomponent , whic h i s primaril y influence db y mixing , an dafar-fiel dcomponent , whic h i s primaril y influence db y th e oxyge n deman dexerte db y th e wastewater . Sinc e th e trave l tim e t o th e edg e o f

th e mixin g zon e i s quit e short compare dt o th e tim e require dfor th e BO D t o exert

a n oxyge n demand , th e near-fiel danalysi s i s primaril y influence db y dilutio n withi n th e mixin g zone . Th e 200 1 Permi t

effluent limit s for

BO D wer e base do n achievin g th e applicabl e wate r quality standar dfor

dissolve doxyge n i n wate r bodie s providin g cool-wate r aquati c life
. I n th e permi t evaluatio n report

for th e 200 1 permi t

renewal , th e Departmen t presente dth e analyse s indicatin g that wate r quality-base deffluent

limitation s for

BO D are no t

neede dfor

th e Blu e Hero n discharge
. Thes e analyse s ar e presente di n Appendi x B o f thi s report . Th e conclusion s o f th e 200 1 analyse s relate dto BO D an dD O als o hol dtru e for th e curren t

applicabl e wate r

quality standar dfor

dissolve doxyge n (OA R340-04 1 -0016(l)(c))
. Base do n thes e evaluations , th e Departmen t i s proposin g to includ e th e currentl y permitte dBO D load s i n th e renewa l NPDE S permit
. 7.1. 2 Turbidit y Th e wate r qualit y standar dfor

turbidity i s dependen t

o n backgroun dstreamturbidity measurements . Th e curren t standar dstate s that

n o mor e tha n a10 % cumulativ e increas e i n strea mturbidity level s i s allowe drelativ e t o acontro l poin t immediatel y upstrea mo f th e turbidity causin g activity
. T o establis h permi t limit s an dt o determin e complianc e wit h thi s standard , i t i s necessar y t o conduc t

in-strea mmonitorin g upstrea mo f th e discharg e ove r

abroa dtim e perio da s well a s t o gathe r

effluent discharg e monitorin g dat afor th e sam e broa dtim e period
. Outfal l 00 1 Turbidit y effluent

limit s for

outfal l 00 1 wer e develope dfor th e 200 1 NPDE S Permit
. Thes e limit s wer e designe dto achiev e th e curren t wate r quality standar dallowin g n o mor e tha n a10 % increas e ove r

backgroun dturbidity values
. Th e dilutio n value s use dto deriv e th e turbidity effluent limit s i n th e 200 1 Permi t ar e lowe r

tha n th e refine ddilutio n value s note di n Sectio n 3.5 , above
. Th e 200 1 Permi t

gav e acomplianc e schedul e for meetin g th e turbidity limit s i n Schedul e C4
. A s explaine di n Sectio n 9. 5 below , th e propose drenewa l permi t include s ane w complianc e schedul e t o addres s thre e issues : 1 ) Th e renewa l permi t require s Blu e Hero n to rerout e th e effluent fro m th e filter backwas h operation s throug h th e treatmen t syste man dt o outfal l 001
. Thi s wil l hav e an impac t o n engineerin g desig n effort s aime dat achievin g th e final effluent limits ; 2 ) Blu e Hero n plan s o n implementin g aprojec t to reus e wastewate r

a t th e plant
. Thi s projec t

i s expecte dt o significantl y reduc e th e plant' s us e o f energ y (natura l gas ) an di s als o expecte dt o resul t i n a decreas e i n effluent

flo w (with associate dreduction s i n pollutan t loadings)
. Thi s als o wil l hav e a n effec t o n engineerin g desig n for meetin g th e fina

l effluent limits ; an d3 ) A ne w turbidity rul e i s schedule dt o b e presente dt o th e Orego n Environmenta l Qualit y Commissio n late r thi s yea r that ma y hav e asignifican t

impac t o n thi s limit
. Th e reroutin g o f

filter plan t discharge s an dth e reus e o f plan t effluent , both o f

whic h ar e expecte d t o hav e significan t

environmenta l benefits , are expecte dt o chang e th e characte r o f th e wastewate r goin g t o th e plant' s treatmen t system . Thi s necessitate s arevie w o f th e turbidity feasibility stud y an dengineerin g desig n previousl y completed
. Thes e change s wil l tak e tw o o r mor e year s t o fully 

## 2 5Permi t Evaluation Repor

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r Compan y implement ; therefore , additiona l tim e wil l b e neede dt o asses s th e impac t o f thes e change s o n th e performanc e o f

th e AS B an dturbidity
. Outfal l 00 2 Th e discharge s fromoutfal l 00 2 are short-terman dintermittent
. Th e discharge s ar e 3 0 minute s i n duratio n an doccu r

3 time s pe r

day (at 8 hou r intervals)
. A n analysi s (Appendi x F ) wa s performe dt o determin e th e turbidity effluent limitation s necessar y t o mee t th e turbidity standard
. Th e resultin g effluent

limitation s - adail y maximu mo f 9 4 NT U for

th e summe r

an dadail y maximu mo f

23 4 NT U for

th e winte r

- ar e include di n th e propose dpermit
. Outfall s 003 , 00 4 an d 00 5 Outfall s 003 , 00 4 an d00 5 are expecte dt o hav e minima l discharge s that coul doccu r

onl y durin g hig h rive r flow s whe n backgroun dturbidity wil l b e a t it s highest
. I t

i s expecte dthat

th e mixin g that wil l occu r

b y th e tim e an y discharg e reache s th e edg e o f th e 1 0 mete r

mixin g zon e wil l provid e th e dilutio n to mee t th e turbidity wate r

quality standard
. Sinc e ther e i s n o reasonabl e potentia l for

thes e discharge s to violat e th e turbidity wate r quality standard , th e Departmen t i s proposin g t o no t

includ e turbidity effluent limit s for

thes e outfalls
. 7.1. 3 Tota l Suspende d Solid s Fo r TSS , ther e ar e n o wate r

qualit y standards
. Th e effluent limit s fromth e 200 1 NPDE S permit , whic h are mor e stringen t

tha n th e technolog y base deffluent limits , wil l b e applie da t outfal l 001
. TS S i s als o aparamete r

o f concern i n th e filter

backwas h discharg e at

outfal l 00 2 an dfor

th e discharge s fro moutfall s 003 , 00 4 an d005
. Th e 200 1 NPDE S permi t includedcombine deffluent limit s for TS S coverin g al l fiv e outfalls
. Thes e limit s wer e 685 5 kg/ da s amonthl y averag e an d 1317 5 kg/ da s adail y average . Thes e limit s ar e les s stringen t tha n th e technolog y base dlimit s for TS S give n i n Tabl e 1 1 above
. Th e combine dTS S limit s i n th e propose dpermi t therefor e reflec t areductio n t o mee t

th e technolog y base dlimit s o f 650 4 kg/ da s amonthl y averag e an d1208 9 kg/ da s adail y average . 7.1. 4 Temperatur e Th e temperatur e effluent

limit s for

thi s permi t

ar e derive dfromeac h o f th e followin g thre e areas : 1 ) Complianc e wit h th e temperatur e standar d(OA R340-041-0028) , 2 ) Complianc e with th e temperatur e therma l plum e limitation s (OA R340-041-0053(2)(d)) , an d3 ) Compariso n wit h th e temperatur e effluent

limit s i n th e 200 1 permit
. Th e mor e stringen t limit s fromeac h o f

thes e wil l b e use dt o determin e th e final temperatur e effluent limits
. 7.1.4. 1 Temperatur e Wate rQuality Standar d Oregon' s temperatur e standar dha s bee n revise dsubstantiall y sinc e th e issuanc e o f th e 200 1 permit
. Thes e change s necessitate darevie w an dreevaluatio n o f th e temperatur e an dhea t loa d limit s i n th e existin g permit
. Base do n th e fis h us e designation s for th e Willamett e Basi n se t ou t i n Figur e 340 A o f

OA R340

- 041-340 , thi s segmen t

o f th e Willamett e Rive r

serve s a s asalmo n an dsteelhea dmigration corridor
. OA R340-04l-0028(4)(d ) state s that , unles s supersede db y th e natura l condition s criteri a describe di n th e rule , th e 7-da y averag e maximu mtemperatur e o f astreamidentifie da s a migration corrido r

may no t excee d2 0 ° C (6 8 °F)
. I n addition , th e temperatur e standar dcall s for th e protectio n o f

coldwate r

refugi at o allo w for

salmo n an dsteelhea dmigration
. A Biologica l Criteri aStudy o f

th e are asurroundin g th e outfal l foun dn o coldwater refugia
. Also , th e mixin g zon e siz e an dlocatio n i s designe dt o b e protectiv e o f salmoni dmigration (se e Sectio n 3.5)
. 

## 2 6Permi t Evaluation Repor

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r Compan y A s note dabove , thi s segmen t o f th e Willamett e Rive r

doe s no t mee t wate r qualit y standard s for temperatur e durin g th e summe r months
. Fo r

stream s that

d o no t mee t wate r quality standards , OA R340-041-0028(12 ) state s th e following : "Prior to completion of

a temperature TMDL

or other cumulative effects analysis, no single NPDES

point source that

discharges into temperature water quality limited

water may cause the temperature of the water body to increase more than 0.3 degrees Celsius (0.5degrees Fahrenheit) above the applicable criteria after mixing with either

twentyfive(25) percent

of the streamflow or

the temperature mixing zone, whichever is more restrictive. " Sinc e atemperatur e TMD L ha s no t bee n finalize dfor

th e Willamett e River , th e abov e provisio n fro mOA R340-041-0028(12 ) applies
. Mas s balanc e analyse s wer e conducte dto determin e whethe r th e discharg e woul dcaus e atemperatur e increas e greate r tha n 0. 3 ° C a t

eithe r at th e edg e o f th e establishe dtemperatur e mixin g zon e o r after mixin g with twenty-fiv e percen t o f th e strea m flow
. Temperatur e increas e at

th e edg e o f

th e mixin g zon e Th e calculatio n t o determin e temperatur e after mixin g wit h th e availabl e temperatur e mixin g zon e i s a s follows : T e =[(T mz *Q inz )-(Q s *T s )]/Q e Where : T e i s th e allowabl e temperatur e o f th e effluent ; T in z i s th e allowabl e temperatur e at th e edg e o f

th e mixin g zon e (20. 3 °C) ; Qm z i s th e dilutio n at

th e edg e o f

th e mixin g zone ; Q s i s th e portio n o f

th e Willamett e Rive r

availabl e for

mixin g (Q m z - 1) ; T s i n th e wate r

quality standar dfor

th e Willamett e Rive r

(2 0 °C) ; an d Q e i s th e effluent

dilutio n facto r

whe n compare dt o th e stream(b y definition , th e valu e o f Q e i s on e [1])
. Estimate ddilution s at

th e edg e o f

th e mixin g zon e with effluent flow s a t th e maximu mpermitte d valu e o f 10. 5 MG D are :

Seasona l Perio d May/Jun e July/Augus t Sept/Oc t Estimate dDilutio n at th e Mixin g Zon e Boundary (MZB ) 100 9 0 102 Th e mas s balanc e analyse s base do n th e availabl e dilutio n withi n th e mixin g zon e indicate s that for th e rive r temperatur e at

th e edg e o f

th e mixin g zon e t o b e increase db y 0. 3 ° C th e discharg e temperatur e for

th e facility woul dhav e t o b e 50. 0 ° C for May/June , 46. 9 ° C for

July/August , an d 50. 6 ° C for

September/October
.



## 2 7Permi t Evaluatio n Report Blu e Hero n Pape r

Compan y Temperatur e increas e afte r mixin g wit h 25 % o f

th e rive r flow Th e calculatio n t o determin e temperatur e afte r mixin g wit h twenty-fiv e percen t o f th e strea mflo w i s a s follows : T e = KQP S + Q R /4) * (T mz )]-[ ( Q R I A)*T s ]

- (Q S *T S )] /

Q P S Where : T e i s th e allowabl e temperatur e o f th e effluent ; T in z i s th e allowabl e temperatur e afte r mixin g wit h twenty-fiv e percen t o f th e strea mflow (20. 3 °C) ; Q P S i s th e maximu meffluen t flow; Q Ri s th e seasona l 7Q1 0 Willamett e Rive r lo w flow; an d T s i n th e wate r

qualit y standar dfo r

th e Willamett e Rive r

(2 0 °C)
.
Th e mas s balanc e analyse s base dmixin g wit h twenty-fiv e percen t o f th e rive r flow indicate s tha t fo r th e rive r

temperatur e t o b e increase db y 0. 3 ° C th e discharg e temperatur e fo r th e facilit y woul dhav e t o b e 51. 8 ° C fo r May/June , 46. 9 ° C fo r July/August , an d52. 4 ° C fo r September/October
. Th e propose drenewa l permi t include s amaximu mtemperatur e effluen t limi t o f 35° C an da7-da y averag e o f th e dail y maximu mtemperatur e limi t o f 33°C
. (Thes e value s ar e base do n value s observe dwhil e operatin g unde r th e 200 1 permit. ) Thus , th e discharg e i s no t expecte dt o increas e temperatur e a t th e edg e o f

th e mixin g zon e o r

afte r mixin g wit h 25 % o f th e rive r b y mor e tha n 0. 3 °C
. Allowabl e Exces s Therma l Loa d T o determin e th e exces s therma l loa dfo r th e facility , th e Departmen t use dth e allowe dmaximu m permitte d7-da y averag e o f th e dail y maximu meffluen t temperatur e (33°C ) alon g wit h a maximu mpermitte deffluen t flo w o f 0.4 6 m 3 / d(10. 5 mgd)
. Th e exces s therma l loa di s calculate d usin g th e followin g equation :

ETL = p C

Q(AT)\ 100 0 \W



# m V S J 1 MW 1 0 6 W
Where : ETL

= Exces s therma l loa d(MW ) p = Densit y o f

water , (1. 0 kg/L ) C p = Specifi c hea t

o f water , (418 2 J/kg-°C ) Q = Discharg e flow , (meters 3 /sec ) AT = Effluen t

Temp
. (°C ) minu s applicabl e criterio n Th e calculate dexces s therma l loa dlimi t fo r Blu e Hero n i s 2 5 MW
. Th e exces s hea t (thermal ) loa dgive n i n th e 200 1 permi t - whil e no t

utilize da s acomplianc e conditio n - wa s 31. 6 M W a s a 7-da y averag e an d27. 2 M W a s amonthl y averag e (se e Tabl e 7)
. Th e exces s therma l loa di n th e propose dpermi t

i s therefor e mor e stringent
. 7.1.4. 2 Temperatur e Therma l Plum e Limitation s Th e Department' s wate r qualit y standard s includ e temperatur e therma l plum e limitation s i n OA R 340-041-0053(d)
. Thi s sectio n o f th e rule s contain s criteri at o preven t potentia l advers e impact s tha t ma y resul t

fromtherma l plumes
. Th e criteri aa s the y appl y t o Blu e Hero n ar e discusse d below :
• OAR 340-041-0053(d)(A): Impairmen t o f a n activ e salmoni dspawnin g are awher e spawnin g redd s ar e locate do r

likel y t o b e located
. 

## 2 8Permi t Evaluation Repor

t Blu e Heron Pape

r Compan y Blue Heron discharge: Ther e i s n o salmoni dspawnin g i n thi s segmen t o f th e Willamett e River
. Thi s segmen t

o f th e Willamett e Rive r

serve s a s amigration corrido r for salmonids
.

• OA R340-041-0053(d)(B) : Acut e impairmen t o r instantaneou s lethality i s prevente do r minimize db y limitin g potentia l fis h exposur e t o temperature s o f 3 2 ° C o r mor e t o les s tha n 2 seconds
. Blue Heron discharge: Th e permi t propose s amaximu meffluent temperatur e a t

outfal l 00 1 o f

3 5 °C
. Th e maximu mmeasure drive r temperatur e i n th e are ao f th e outfal l i s 24.8°C
. Base do n modelin g o f

near-fiel dmixin g for

condition s considere dto b e critica l for acut e impairmen t

near th e diffusers , th e centerlin e dilutio n jus t prio r t o tw o second s i s 2.6
. A mas s balanc e analysi s (provide di n Attachmen t

G ) give s an effluent

plum e temperatur e o f

28.7° C after

atrave l tim e o f

2 seconds
. Therefore , unde r awors t cas e scenario , th e temperatur e at th e centerlin e o f

th e plum e a s i t move s downstrea mo f

eac h individua l diffuse

r port drop s from35° C t o 28.7° C withi n 2 seconds
. Fis h exposur e t o temperature s ove r 32° C wil l b e for

les s than 2 seconds
.

• OA R340-041-0053(d)(C) : Therma l shoc k cause db y asudde n increas e i n wate r temperatur e i s prevente do r

minimize db y limitin g potentia l fis h exposur e t o temperature s o f 2 5 ° C o r mor e t o les s tha n 5 % o f

th e cross-sectio n o f

100 % o f th e 7Q1 0 flow o f

th e waterbody
. Blue Heron discharge: Th e approximat e cross-sectiona l are ao f th e Willamett e Rive r

near th e outfal l a t 7Q1 0 lo w flows i s 24,00 0 ft 2

. Fiv e percen t

o f thi s are ai s 120 0 ft 2

. Th e effluent limitation s i n th e Blu e Hero n permi t ensur e that

whe n th e effluent

plum e reache s 5 % o f

th e river' s cross-sectiona l area , th e plume' s temperatur e wil l neve r b e ove r 25° C unles s th e ambien t rive r condition s approac h 25°
. A t an ambien t

rive r temperatur e o f

24.8°C , th e increas e i n rive r temperatur e at

th e poin t wher e th e plum e reache s 5 % o f th e rive r cross-sectiona l are ai s approximatel y 25.1° C (Se e calculation s i n Attachmen t G)
. Thi s portio n o f

th e therma l plum e rul e i s base dprimaril y o n th e USEP A guidanc e document , EPA Region 10Guidance

for Pacific Northwest

State and

Tribal Temperature Water

Quality Standards (Apri l 2003)
. Sectio n V.3
. o f th e documen t

give s guidanc e o n protecting salmonid s fromtherma l plum e impact s an dprovide s th e followin g discussio n o n therma l shock : Thermal shock leading to increased

predation can occur

when salmon and

trout exposed to near optimal temperatures (e.g., 15°C) experience a sudden temperature increase to 26 - 30°Cfor

a short period of time (Coutant, 1973). Therefore, EPA suggests that thermal plumes be conditioned

to limit the crosssectional

area of a river that exceeds 25°C to a small

percent of the river (e.g., 5percent

or less). I t i s clear that therma l shoc k

occur s whe n ambien t

rive r condition s are suddenl y increase dfrom relativel y lo w temperature s (th e exampl e o f 15° C i s given ) t o temperature s abov e 25°C
. I t i s als o clear that thi s elemen t

i s intende dt o appl y whe n ambien t rive r temperature s are muc h lowe r tha n 25°C
. 340-041-0053(d)(C ) provide s on e metho dto ensur e therma l shoc k doe s no t occur , bu t

a t highe r ambien t rive r temperature s additiona l exposur e timin g restriction s ma y b e develope dt o preven t therma l shock
. On e suc h restrictio n i s t o ensur e rive r temperature s ar e no t

increase db y mor e tha n ademinimi s amoun t whe n th e effluent

plum e reache s 5 % o f

th e river' s cross-sectiona l area . Fo r th e Blu e Hero n discharge , th e expecte dincreas e i n rive r temperature s whe n th e effluent plum e reache s 5 % o f

th e river' s cross-sectiona l are aan dth e rive r temperatur e approache s 25° C i s approximatel y 0.3°C
. A n increas e thi s smal l doe s wil l no t resul t i n therma l shoc k

an di s considere ddeminimis
. 

## 2 9Permi t Evaluation Repor

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r Compan y

• OAR 340-041-0053(d)(D): Unles s ambien t temperatur e i s 21° C o r

greater , migration blockag e i s prevente do r

minimize db y limitin g potentia l fis h exposur e t o temperature s o f 2 1 ° C o r mor e t o les s tha n 25 % o f

th e cross-sectio n o f

100 % o f th e 7Q1 0 flow o f

th e waterbody
. Blue Heron discharge: Thi s rul e i s als o base dprimaril y o n th e USEP A guidanc e document , EPA Region 10Guidance

for Pacific Northwest

State and

Tribal Temperature Water

Quality Standards (Apri l 2003)
. Sectio n V.3
. o f th e documen t

give s guidanc e o n protecting salmonid s fromtherma l plum e impact s an dprovide s thi s discussio n o n migration blockage : Adult migration blockage conditions can occur at 21°C... Therefore, EPA suggests that the cross-sectional

area of a river at or above 21 °C

be limited

to less than 25% or, if upstream temperature exceeds 21°C, the thermal plume be limited

such that 75% of the cross-sectional

area of the river has less than a de minimis (e.g., 0.25°C) temperature increase. Th e effluent

limitation s i n th e Blu e Hero n permi t ensur e that

whe n th e ambien t

rive r temperatur e approache s 21° C (20.9°C) , th e resultin g temperatur e o f effluent plum e whe n i t

reache s 25 % o f th e river' s cross-sectiona l are awil l b e 21° C (se e calculation s i n Attachmen t G o f th e PER)
. Thi s i s clearl y ademinimi s increas e whic h prevent s o r minimize s migration blockage
. 7.1.4. 3 Existin g Permi tLimit s fo rTemperature/Therma l Load s an d Anti-backslidin g Th e 200 1 permi t

containe deffluent

limitation s relate dt o temperature , exces s hea t loa dan d relativ e hea t

loa d(se e page s 1 9 throug h 21 , above)
. Complianc e wit h thes e limit s wa s demonstrate dthroug h meetin g eithe r th e temperatur e limi t

o r th e relativ e hea t

loa dlimit : In any designated

period (7-day, month), if

the temperature effluent

limit has been achieved, the permittee shall be deemed

in compliance with this condition without consideration of

relative heat

load. In any designated

period, if

the effluent

temperature limit has been exceeded

but the relative heat

load limitation has not

been exceeded, the permittee shall

be deemed

in compliance with this condition. Otherwise the permittee shall be deemed

out of compliance with this condition for the designated

period. (Fro m Schedul e A
. 8 o f

200 1 permit ) I n Schedul e A
. 1 o f

th e propose dpermit , relativ e therma l (heat ) loa dlimit s hav e bee n include dfor period s whe n th e maximu m7-da y Averag e effluent

temperatur e exceed s 30° C an dwhe n th e maximu mmonthl y averag e effluent temperatur e exceed s 27.2°C
. Thes e limit s ar e a s stringen t a s thos e i n th e 200 1 permi t

an densur e ther e i s n o backslidin g associate dwit h th e temperatur e limit s i n th e ne w permit
. I t

shoul db e note dthat

th e exces s therma l loa dvalue s presente di n th e 200 1 permi t wer e no t use dfor complianc e purpose s an ddi dno t limi t loads
. Eve n so , th e propose d permi t contain s alowe r

exces s therma l loa dlimi t (2 5 M W a s a7-day average ) tha n th e 200 1 permi t (31. 6 M W 7-day an d27. 2 M W monthl y averages)
. With th e combinatio n o f

ne w maximu mdail y temperatur e limits , averag e temperatur e limit s applicabl e regardles s o f

load , ne w exces s therma l limits , an drelativ e therma l loa dlimit s comparabl e t o th e 200 1 limits , th e propose dpermi t limit s are significantl y mor e restrictiv e tha n th e 200 1 limits
. 7.1. 5 p H A s note di n Section 3.1, Applicable Water Quality Standards, th e wate r qualit y standar dfor

p H for th e Willamett e Rive r

i s 6. 5 - 8.5
. Th e p H limi t i n th e 200 1 NPDE S permi t wa s 6. 0 - 8. 5 at outfal l 001
. Th e technolog y base dlimi t for outfal l 00 1 i s ales s stringen t 5. 0 - 9.0
. With th e dilutio n availabl e withi n th e mixin g zone , discharge s fromth e Blu e Hero n facility at th e existin g 

## 3 0Permi t Evaluation Repor

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r Compan y p H limit s wil l b e abl e t o mee t th e wate r qualit y standar dat

th e edg e o f

th e mixin g zone . Thus , a p H limi t base do n th e curren t

(an dmor e stringent ) limi t o f 6. 0 - 8. 5 i s propose dfor

th e discharg e fromoutfal l 001
. Fo r outfal l 002 , th e 200 1 NPDE S permi t specifie dap H limi t

o f 5. 5 t o 8. 5 for

th e filter backwas h discharge
. Ther e i s n o technology-base dlimi t i n th e federal regulation s for filter backwas h discharge
. Du e t o th e limite ddilutio n availabl e at th e mixin g zon e boundary , th e Departmen t i s proposin g t o modif

y th e permi t

t o includ e amor e stringen t p H limi t o f 6. 0 to 8. 5 for

thi s outfall
. With thes e limit s an dth e dilutio n availabl e withi n th e mixin g zone , th e discharg e i s expecte dto b e abl e to mee t

th e wate r quality standar dfor

p H at th e edg e o f

th e mixin g zone . Fo r outfall s 003 , 00 4 an d005 , th e Departmen t i s proposin g t o kee p th e curren t p H limit s o f

6.5

- 8.5 , whic h i s th e wate r

quality standar dfor

pH
. 7.1. 6 Toxi c Pollutants Outfall 001 Base do n arevie w o f

th e analytica l dat asubmitte dwit h th e NPDE S permi t application , th e toxi c pollutant s o f

concer n at

outfal l 00 1 ar e aluminum , arsenic , chromium , copper , lead , mercury , nickel , an dzinc
. A n evaluatio n wa s conducte dt o determin e whethe r th e level s o f

thes e pollutant s i n th e discharg e hav e a"reasonabl e potentia l t o exceed " wate r quality standards
. Th e followin g tabl e specifie s th e aquati c lif e an dhuma n health wate r qualit y standards , th e maximu m effluent concentration , an dth e numbe r o f sample s collecte dfor

eac h pollutant
. TABL E 12 : TOXI C POLLUTANT S O F CONCER N A T OUTFAL L 00 1 Metal s Paramete r

Aluminum* Arseni c (+3 ) Cadmiu m Chromiu m(total ) Coppe r Iro n Lea d Mercury Nicke l Silve r Zin c Aquati c Freshwate r Criteri a Acut e Ug/ L 75 0 36 0 0.7 8 55 6 4.6 2 N/A 1 3 2. 4 42 4 0.3 5 3 5 Chroni c

Ug/ L 8 7 19 0 0.3 7 7 5 3.4 9 100 0 0. 5 0.01 2 4 7 0.1 2 3 2 Huma n Healt h

Criteri a Ug/ L N/A N/A 1 0 N/A N/A 30 0 5 0 144 13. 4 5 0 N/A Effluen t

Maximu m Measure d Ug/ L 0.2 7 10. 0 0.5 0 6.2 9 11. 6 38 7 7.6 0 0.10* * 16. 0 0.1 0 28 4 Maximu m

Probabl e Ug/ L 3. 6 19. 0 1.2 0 12.5 8 29. 0 510 8 19. 0 0.2 2 25. 6 0.2 9 36 9 * Not e that

th e aluminu mcriteri ahav e no t bee n adopted
. Th e propose dcriteri aappl y onl y a t pH<6. 6 an dhardness<1 2 mg/L (a s CaC03) , value s no t observe di n th e receivin g water . * * Mercury wa s no t

detecte di n an y sample
. A valu e o f one-hal f th e detectio n limi t

wa s use dt o estimat e amaximu mprobabl e value
. Currently , th e Departmen t ha s no t adopte dawate r

quality criterio n for

aluminum
. A n aluminu m criterio n ha s bee n develope db y EP A an dDE Q i s proposin g t o adop t it
. Th e aluminu mcriterio n presente di n th e tabl e abov e i s th e wate r quality criterio n whic h th e Departmen t i s proposin g to adopt
. I n addition , th e propose daluminu mcriterio n applie s at p H value s belo w 6. 6 an dhardnes s value s belo w 1 2 mg/L (a s CaC0 3 )
. Thes e value s ar e no t observe di n thi s sectio n o f th e Willamett e River
. Therefore , ther e i s n o reasonabl e potentia l for th e discharg e t o excee dth e 

## 3 1Permi t Evaluation Repor

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r Compan y wate r qualit y standar dfor

aluminu man dth e aluminu mi s no t considere datoxi c substanc e i n thi s discharge
. Whe n determinin g whethe r adischarg e ha s th e potentia l t o excee dwate r qualit y standards , th e Departmen t

account s for

th e variabilit y o f

th e effluent
. A multiplie r i s use dt o accoun t

for effluent variabilit y i n accordanc e wit h th e method s outline di n EPA' s Technical Support Document for Water Quality Based

Toxics Control

(Marc h 1991)
. T o determin e whethe r th e discharg e ha s areasonabl e potentia l to excee dwate r qualit y standard s for

thes e pollutants , a spreadshee t

that simulate s th e approac h i n EPA' s Technical Support Document

for Water Quality Based Toxics wa s used
. Maximu mprobabl e effluent concentration s (base do n th e multiplier) , wate r qualit y criteria , an dmixin g zon e dilutio n dat aar e use dt o determin e whethe r th e discharg e ha s areasonabl e potentia l to excee dwate r quality standards
. Some backgroun ddat afor metal s are availabl e abov e th e discharg e location
. However , th e hig h detectio n limit s associate dwit h som e o f thes e dat amak e the mo f

limite dvalue
. Th e City o f Portlan dha s bee n collectin g hig h resolutio n metal s dat ai n th e lowe r portio n o f

th e Willamett e River
. Becaus e th e City o f Portlan ddat ai s develope dusin g state-of-the-art analytica l technique s an di s o f hig h quality , th e Departmen t i s usin g thes e data , whe n availabl e for specifi c parameters , i n th e wate r

qualit y analysis
. Th e dat acollecte dfrom200 1 - 200 3 at th e Waverl y Count y Clu b (RM 17.9 ) wer e use di n th e analysis
. Th e result s o f

th e reasonabl e potentia l analysi s for outfal l 00 1 ar e include di n Attachmen t C
. Th e result s indicat e that

th e discharg e ha s n o reasonabl e potentia l to excee dth e wate r quality standard s for

an y o f th e pollutant s o f

concern identifie di n Tabl e 12
. Th e previou s permi t include da n effluent

limi t for zin c base do n th e ZI D dilutio n value s applicabl e for that permit
. Th e propose dpermi t

als o retain s th e effluent

limi t for zinc
. Outfall 002 Base do n an analysi s o f

monitorin g data , th e toxi c pollutant s o f concer n at

outfal l 00 2 ar e chlorin e an daluminum
. Blu e Hero n ha s collecte ddat ato characteriz e level s o f aluminu man d chlorin e i n th e effluent

at outfal l 002
. Th e followin g tabl e specifie s th e aquati c lif e an dhuma n health wate r

quality standard , th e maximu meffluent concentration , an dth e numbe r o f sample s collected
.



## 3 2Permi t Evaluation Repor

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r Compan y
TABL E 13 : TOXI C POLLUTANT S O F CONCER N A T OUTFAL L 00 2 Paramete r Uni t Aquati c Lif e Criteri a
Acut e Criterio n Chroni c

Criterio n Huma n

Healt h Criteri a Ma x Effluen t

Concentratio n Wate r& Fis h Ingestio n Numbe r of Sample s

Aluminum* Ug/

L 75 0 N/ A 1930 0 Chlorin e mg/L 0.01 9 0.01 1 N/ A 0.3 4 * Not e that

th e aluminu mstandar dha s no t bee n adopted
. Th e criterio n i s als o p H an d hardnes s dependent
. A s note dabove , th e aluminu mcriterio n presente di n Tabl e 1 3 i s th e wate r quality criterio n whic h th e Departmen t

i s proposin g t o adopt
. I n addition , th e propose daluminu mcriterio n applie s a t p H value s belo w 6. 6 an dhardnes s value s belo w 1 2 mg/L (a s CaC0 3 )
. Thes e value s are no t observe d i n thi s sectio n o f

th e Willamett e River
. Therefore , ther e i s n o reasonabl e potentia l for th e discharg e t o excee dth e wate r qualit y standar dfor

aluminum
. Th e reasonabl e potentia l analysi s for chlorin e fro moutfal l 00 2 i s presente di n Attachmen t D
. Discharge s fro moutfal l 00 2 ar e limite dto 3 0 minute s an donl y occu r onc e every eigh t

hours
. Du e t o thi s short-terman dintermitten t natur e o f th e discharg e (a s well a s th e dilutio n a t th e edg e o f th e mixin g zone) , ther e i s n o reasonabl e potentia l t o excee dth e chroni c criteri afor chlorine. Ther e i s apotentia l t o excee dth e acut e criteri afor chlorine
. Th e acut e standard s ar e base do n meetin g th e criteri aa s a n averag e ove r aon e hou r

period
. Therefore , an effluent limi t ha s bee n develope dfor

chlorin e whic h accoun t

for th e short-termnatur e o f

th e discharge
. Th e effluent limi t for chlorin e include di n Schedul e A o f th e propose dpermi t

i s 0.0 4 mg/l a s adail y maximu m (Attachmen t

E)
. 7. 2 Whol e Effluen tToxicit y Testin g Th e 200 1 NPDE S Permi t require dBlu e Hero n t o conduc t whol e effluent

toxicity (WET ) testin g o f th e discharg e fro moutfal l 001
. WE T testin g wa s conducte dquarterl y eac h yea r o n Pimephales promelas (fathea dminnow) , Raphidocelis subcapitata (gree n algae ) an d Ceriodaphnia dubia (wate r flea)
. A n acut e WE T tes t i s considere dt o sho w toxicity i f th e "N o Observe dEffec t

Concentration " (NOEC ) occur s a t dilution s greate r

tha n that whic h i s foun dat th e edg e o f

th e zon e o f

immediat e dilutio n (ZID)
. A chroni c WE T tes t i s considere dto sho w toxicity i f " asignifican t

differenc e i n survival , growth o r reproduction " occur s at

dilution s greate r tha n tha t whic h i s know n to occu r a t th e edg e o f

th e mixin g zone . WE T tes t result s from200 1 - 200 5 wer e reviewe dindicatin g th e facility ha s bee n i n complianc e wit h thi s provisio n o f th e permit
. Becaus e o f

th e siz e an dcomplexity o f th e discharge , th e Departmen t i s proposin g t o continu e requirin g WE T testin g a t th e sam e frequency a s require db y th e 200 1 permit
. Th e Deparatmen t

i s als o modifyin g th e permi t languag e t o allo w th e us e o f Oncorhynchus mykiss (rainbo w trout ) for

th e acut e WE T test .



## 3 3Permi t Evaluation Repor

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8 Complianc e Histor y A revie w o f

Discharg e Monitorin g Report s (DMRs ) ove r th e pas t four year s (2001-2005 ) indicate s that

Blu e Hero n ha s me t

effluent limit s i n it s NPDE S permi t with th e exceptio n o f

on e violatio n o f

th e monthl y averag e turbidity effluent limi t i n February 2003
. I n addition t o this , th e facility receive danotic e o f non-compliance for

th e lat e submitta l o f

arepor t i n August , 2002
. Becaus e th e mil l i s locate dove r be droc k i n th e Willamett e Rive r

an dbecaus e o f

th e ag e o f

th e facility , spil l preventio n an dcontro l ar e majo r issue s for

Blu e Heron
. Several spill s hav e occurre dat

th e facility ove r

th e las t four years . Man y o f

thes e spill s d o no t

reac h th e river , bu t ar e containe dan dcleane dup . I n Decembe r o f 2003 , aspil l o f

sulfuri c aci dto th e rive r

resulte di n anotic e o f

violation
. Th e caus e o f

th e spil l wa s addresse db y th e facility
. I n Apri l o f 200 4 aspil l t o th e Willamett e o f

clarifie r effluent resulte di n anotic e o f

non-compliance
. Th e caus e o f thi s spil l wa s aleakin g pip e that wa s subsequentl y repaired
. Th e propose dpermi t

require s Blu e Hero n t o hav e acontingenc y pla n for preventio n an dhandlin g o f spills
. A s par t

o f th e contingenc y plan , Blu e Hero n i s require dt o maintai n acontinuin g progra mo f

employe e orientatio n an deducatio n for goo din-plan t

contro l an dquic k

an dprope r actio n i n th e even t

o f aspil l o r accident
. Blu e Hero n i s require dt o submi t an annua l repor t

summarizin g eac h spil l even t durin g th e previou s calendar

yea r alon g wit h th e action s take n t o addres s th e spill
. Blu e Hero n i s als o require dt o updat e th e contingenc y pla n for preventio n an dhandlin g o f spill s an dunplanne d discharge s o n a n annua l basis
. 9 Discussio n of

Propose d NPDE S Permi t 9. 1 NPDE S Permi tOutlin e Th e propose dNPDE S permi t i s organize dint o acove r pag e an dsevera l schedule s that are discusse dfurther

i n thi s section
. Th e schedule s include : • Schedul e A - Wast e Discharg e Limitation s
• Schedul e B - Minimu mMonitorin g an dReportin g Requirement s
• Schedul e C - Complianc e Condition s an dSchedule s
• Schedul e D - Specia l Condition s
• Schedul e E - No t

Applicabl e (thi s schedul e i s reserve dfor federal pretreatmen t requirement s for

publicl y owne dtreatmen t work s an di s no t

applicabl e to thi s permit )
• Schedul e F- Genera l Condition s 9. 2 Cove rPag e Th e fac e pag e o f

th e NPDE S permi t

identifie s that

Blu e Hero n i s permitte dt o discharg e proces s wastewate r

to th e Willamett e Rive r

throug h outfal l 00 1 at

R M 27.5
. Blu e Hero n i s als o currentl y permitte dt o discharg e wastewater s fro mth e filter plan t t o th e Willamett e Rive r

throug h outfal l 00 2 a t RM 26. 1 (Schedul e D o f th e propose dpermi t

include s th e requiremen t t o eliminat e thi s discharge)
. I n addition , Blu e Hero n i s als o permitte dt o discharg e miscellaneou s effluent s throug h outfall s 003 , 00 4 & 00 5 at approximatel y RM 26.3
. Th e permi t wil l b e issue dfor

a perio dno t

to excee dfiv e year s fromth e dat e o f issuance
.



## 3 4Permi t Evaluatio n Report Blu e Hero n Pape r

Compan y 9. 3 Schedul e A Fo r Outfal l 001 , effluent

limit s ar e propose dfor

TSS , BOD , pH , turbidity , E
. col i bacteria , zin c an dtemperature . Th e limit s for TSS , BOD , E
. col i bacteria , flow , turbidity , zin c an dp H ar e th e sam e a s thos e i n th e 200 1 NPDE S permit
. Du e t o syste mmodification s planne db y th e plan t an d require db y thi s permit , an dbecaus e th e turbidity rul e i s slate dfor modificatio n late r

thi s year , th e Departmen t

i s proposin g t o retai n th e curren t permit' s interi mturbidity limit s an dt o establis h a ne w turbidity complianc e schedule
. Thi s i s further explaine di n Sectio n 7.1.2 , abov e an dSectio n 9.5 , below
. Also , a s explaine di n Sectio n 7.1. 4 above , th e Departmen t i s proposin g t o modif

y th e temperatur e effluent

limit s t o addres s th e ne w temperatur e rule
. Th e propose deffluent

limit s at outfal l 00 1 ar e presente di n th e tabl e below : Tabl e 14 : NPDES PermitLimit s a tOutfal l 00 1 Paramete r
Flo w BOD 5 BOD 5 TS S (Not e 1 )

E. coli bacteri a (Not e 3 ) Lea d Turbidit y (Interim ) Turbidit y (Interim ) Turbidit y (Final ) Turbidit y (Final ) Zin c PH Seaso n

Ju n 1-Se p 3 1 Ju n 1-Oc t 3 1 No v 1 -Ma y 3 1 Ja n 1 - De c 3 1

Ja n 1-De c 3 1 Ja n 1-De c 3 1 May 1 -Oc t

3 1 No v 1 - Ap r

3 0 May 1 -Oc t

3 1 No v 1 - Ap r

3 0 Ja n 1 - De c 3 1 Ja n 1 - De c 3 1 Limitation s

Monthl y Averag e

— 362 5 kg/ d 427 5 kg/ d 552 5 kg/ d (12,18 1 lb/d ) 126/10 0 m L 9. 5 ug/L 200NT U 20 0 NT U 4 0 NT U 11 5 NT U

— Dail y

Maximu m

— 435 0 kg/ d 680 0 kg/ d 1027 5 kg/ d (22,65 2 lb/d ) 406/10 0 m L 20. 5 ug/ 1

—

—

—

— 5 0 kg/ d Maximu m

7-Day Movin g Averag e 0.46 0 m 3 /s (10. 5 MGD )

—

—

—

—

7 0 NT U 20 0 NT U

— shal l b e withi n th e rang e o f 6. 0 t o 8. 5



## 3 5Permi t Evaluatio n Report Blu e Hero n Pape r

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Tabl e 1 4 (continued) : NPDE S Permi tLimit s a tOutfal l 00 1 Temperatur e an d Hea tLoa d Limitation s Temperatur e Limitation s Januar y 1 - Decembe r3 1 7-Da y Averag e o f

th e Dail y Maximu m Effluen t Temperatur e Dail y Maximu mEffluen t Temperatur e 3 3 ° C 3 5 ° C Exces s Therma l Loa d (ETL ) Limitation s Januar y 1 - Decembe r3 1 Maximu m7-Da y Averag e Exces s Therma l Loa dDischarge d 2 5 M W Relativ e Therma l Loa d (RTL ) Limitation s Fo r Period s Wher e th e Maximu m7-Da y Averag e Effluen t

Temperatur e Exceed s 30°C , th e Maximu m7-Da y Averag e Relativ e Therma l Loa dDischarge d(MW ) ar e a s

follow s Fo r Period s Wher e th e Maximu mMonthl y Averag e Effluen t

Temperatur e Exceed s 27. 2 °C , th e Monthl y Averag e Relativ e Therma l Loa dDischarge d(MW ) ar e a s follow s Ma y 1-Jun e 3 0 19. 9 16. 5

Jul y 1 - Augus t

3 1 17. 5 13. 6

Septembe r

1 - Novembe r

3 0 19. 4 15. 8 Th e effluent

limit s a t outfal l 00 2 ar e presente di n th e tabl e below : 

### Tabl e 15 : NPDE S Permi tLimit s a tOutfal l 00 2 Paramete r Chlorin e Turbidity (May 1 - Oct
. 31 ) Turbidity (Nov. l -Apri l 30 ) p H Dail y Maximu m 4 0 ug/ 1 9 4 NT U 23 4 NT U Withi n th e rang e o f

6. 0 t o 8. 5
Th e 200 1 NPDE S permi t containe da"bubble " TS S loa dfor al l o f th e outfalls
. Th e Departmen t i s proposin g t o retai n thi s effluent limit
. Th e NPDE S permi t

specifie s th e mixin g zone s an dZID s for eac h outfall
. Th e mixin g zon e an d ZI D definition s for

al l outfall s are th e sam e a s thos e i n th e 200 1 NPDE S permit
. Th e on e exceptio n i s that

th e mixin g zon e for

regulate dparameter s othe r tha n turbidity an dtemperatur e ha s bee n modifie dt o onl y includ e th e portio n o f th e rive r downstrea mo f

th e diffuser
. Thi s modificatio n als o reduce s th e siz e o f th e ZI D (se e discussio n i n Sectio n 3.5)
. I t shoul db e note d that th e propose dpermi t

als o complie s wit h th e temperatur e therma l plum e limitation s a s note di n Sectio n 7.1. 4 above
.



## 3 6Permi t Evaluatio n Report Blu e Hero n Pape r

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9. 4 Schedul e B - Minimu m Monitorin g an d Reportin g Requirement s 9.4. 1 Monitorin g Requirement s Th e propose dNPDE S Permi t require s th e reportin g o f

pape r productio n dat ai n th e tabl e below
. Tabl e 16 : Reportin g Requiremen tfo rProductio n Dat a Paramete r Pul p Productio n Unit s Tons/da y Minimu m

Frequenc y Monthl y Productio n i s define da s averag e air-dry ton s o f eac h typ e o f

pul p produce dpe r

day o f productio n durin g th e reportin g perio dreportin g perio d(i.e
. month ) divide db y th e numbe r o f operatin g day s durin g th e reportin g period
. Th e monitorin g frequencies an dth e parameter s t o b e monitore dat outfal l 00 1 are specifie di n Tabl e 17
. Variou s note s t o th e monitorin g requirement s ar e include di n th e permi t a t Schedul e B.l
.



## 3 7Permi t Evaluatio n Report Blu e Hero n Pape r

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### Table 17 : Monitoring Requirement s forOutfal

l 00 1 Paramete r Flow : averag e daily , 7-day movin g average , monthl y averag e BOD 5 

### TS S Colo r p H Temperature : AS B effluent dail y maximu m, 7-day averag e o f dail y maximums , 7-day averag e an dgra

b a t tim e o f mercury monitorin g (Not e 2 ) Exces s Therma l Loa d- dail y an d7-day averag e (Not e 3 ) Relativ e Therma l Loa d- daily , 7-day averag e an dmonthl y averag e (Not e 3 )
AS B sludg e depth Pul p productio n Pape r productio n Whol e effluent

toxicit y E. coli bacteri a Tota l Mercur y Methylmercury Hardnes s Dissolve dOrgani c Carbo n Tota l Organi c Carbo n Sulfate Redo x Dissolve dOxyge n cadmiu m coppe r lea d zin c turbidity : AS B effluent ; dail y value , 7-day movin g average , monthl y averag e Unit s m7 s mg/L , kg/ d mg/L , kg/ d colo r unit s (cu. ) standar dunit s (s.u. )

° C

M W M W

m t/ d t/ d toxicit y repor t counts/10 0 mL ng/L ng/L mg/ L mg/ L mg/ L mg/ L mV mg/L Ug/ L Ug/ L Ug/ L Ug/ L NT U Minimu m

Frequenc y 1/da y
3/week 3/week 3/wee k 3/wee k an dwith eac h mercury sampl e 1/da y an dwith eac h mercur y sampl e

1/da y 1/da y

1/ 6 month s 1/mont h 1/mont h 2/year 5/mont h 1/quarter 1/quarter 1/quarter 1/quarte r 1/quarte r 1/quarter 1/quarter 1/quarte r 1/mont h 1/mont h 1/mont h 1/mont h 1/da y Typ e o f

Sampl e continuou s meter/calculat e d composit e composit e gra b gra b
continuou s recorder/grab

calculate d calculate d

measuremen t calculatio n calculatio n composit e gra b gra b gra b gra b gra b gra b gra b gra b gra b composit e composit e composit e composit e composit e


## 3 8Permi t Evaluation Repor

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Th e propose dmonitorin g frequency for flow, BOD , TS S an dp H ar e th e sam e a s i n th e 200 1 NPDE S permit
. Dail y monitorin g o f effluent temperatur e usin g acontinuou s recordin g devic e i s bein g propose da s recommende di n th e Department' s guidanc e for temperatur e managemen t plans
. Blu e Hero n ha s alread y installe dacontinuou s recordin g devic e to collec t temperatur e data
. Th e propose dpermi t als o include s monitorin g requirement s for mercury usin g clea n technique s for

collectio n an danalysi s whic h wil l resul t i n very lo w (0. 5 ng/L ) detectio n limit s for tota l mercury . A s discusse di n Section 7.2, th e Departmen t i s proposin g to continu e requirin g WE T testin g a t a frequency o f

four time s ayear . T o ensur e that th e outfal l diffuse

r i s functionin g a s designed , th e permi t require s Blu e Hero n t o visuall y inspec t th e outfal l at

leas t onc e durin g th e permi t

cycle
.
A t outfal l 002 , th e filter

backwas h discharge , the monitorin g requirement s are a s follows : Tabl e 18 : Outfal l 00 2 Monitorin g Requirement s Paramete r Flo w TS S Chlorin e Turbidit y p H Unit s m7 s mg/L , kg/ d ug/ L NT U

s.u . Minimu m Frequenc y

1/wee k 1/wee k 1/mont h 1/mont h 1/wee k Typ e o f Sampl e Estimat e durin g Discharg e Composit e durin g Discharg e Composit e durin g Discharg e Composit e durin g Discharg e Gra b durin g Discharg e

A t outfall s 003 , 00 4 an d00 5 th e monitorin g requirement s are a s follows :

Tabl e 19 : Monitorin g Requirement s fo rOutfall s 003 , 00 4 & 00 5 Paramete r Visua l Observatio n Numbe r o f Event s Tota l Dail y Flo w Temperatur e TS S p H Oi l & Greas e Minimu m Frequenc y 3/day Monthl y 1/discharg e even t 1/discharg e even t 1/da y 1/da y 1/da y Typ e o f Sampl e Observatio n Calculatio n Estimat e Gra b Composit e Composit e Composit e



## 3 9Permi t Evaluatio n Report Blu e Hero n Pape r

Compan y 9.4. 2 Reportin g Requirement s Th e propose dNPDE S permi t require s monitorin g report s t o b e submitte do n amonthl y basis
. Monthl y report s mus t

b e submitte db y th e 15 t hday o f th e followin g month
. Blu e Hero n lan dapplie s solid s fromit s primar y clarifie r for beneficia l use . O n amonthl y basi s wit h th e discharg e monitorin g report , th e permi t require s Blu e Hero n t o repor t th e quantity o f soli ddelivere dt o eac h lan dapplicatio n site , an dth e quantity utilize dfor beneficia l use s othe r tha n lan dapplication
. O n an annua l basi s Blu e Hero n i s require dt o submi t an update d wastewate r

solid s managemen t

pla n an dt o submi t

a n annua l report Thi s portio n o f

th e NPDE S permi t

specifie s ho w "non-detect " sampl e result s shoul db e reported ; require s that

monitorin g record s b e prepare di n ink ; specifie s th e procedure s for calculatin g th e 7

- day movin g average ; an ddefine s continuou s monitoring
. 9. 5 Schedul e C - Complianc e Condition s an d Schedule s Thi s portio n o f

th e propose dNPDE S Permi t include s complianc e condition s an dschedules
. Schedul e C , Conditio n 1 require s that Blu e Hero n instal l aflow monitorin g an drecordin g devic e at th e overflo w structur e o f thei r aerate dstabilizatio n basin , o r us e suc h othe r

metho da s accuratel y determine s an drecord s th e flo w at th e overflo w structure , i n th e even t th e permitte e change s th e flo w patter n s o that th e primary clarifie r

mete r i s n o longe r

representativ e o f

th e flow rat e discharged
. Schedul e C , Conditio n 2 include s aschedul e for addressin g turbidity issues
. A s note dabove , th e Departmen t

i s currentl y reviewin g it s turbidity standard
. I f th e turbidity standar di s modified , Blu e Hero n ma y submi t

amodificatio n reques t

for recalculatio n o f

turbidity limits
. Th e complianc e schedul e require s Blu e Hero n t o continu e with it s effort s undertake n unde r th e 200 1 Permi t t o achiev e th e fina

l turbidity effluent

limit s give n i n Schedul e A
. Th e firs t componen t

o f th e schedul e i s t o modif

y th e feasibility stud y complete dunde r th e 200 1 permi t

to addres s issue s relatin g to increase dflo w an dsolid s bein g diverte dfromoutfal l 00 2 t o th e wastewate r treatmen t syste m(a s require dunde r Schedul e D)
. Thi s feasibility stud y als o wil l nee dt o reflec t th e effect s o f th e wastewate r

reus e projec t

o n th e performanc e o f

th e ASB
. Th e secon dcomponen t o f thi s schedul e i s t o complet e engineerin g desig n o f treatmen t syste mmodification s t o achiev e th e fina l effluent limits
. Th e final componen t i s t o achiev e th e fina

l effluent limit s give n i n Schedul e A
. A s note di n Sectio n 7.1. 2 above , th e reason s for thi s complianc e schedul e are : 1 ) Schedul e C 2 o f th e permi t

i s requirin g th e filter

backwas h wate r

t o b e reroute dt o th e treatmen t system , thereb y alterin g th e characteristic s o f th e wast e strea man dnecessitatin g arevise dfeasibility stud y an d impactin g th e engineerin g design , an d2 ) Th e permitte e i s undertakin g amajo r projec t t o reus e approximatel y 2 0 percen t o f it s wastewater , whic h wil l affec t th e performanc e o f

th e ASB , an d3 ) A ne w turbidity standar di s schedule dt o b e presente dt o th e Orego n Environmenta l Qualit y Commissio n late r

thi s yea r that ma y hav e an impac t

o n thi s limit
. I f

th e turbidity standar di s modified , Blu e Hero n ma y appl y t o th e Departmen t for apermi t modificatio n t o recalculat e it s turbidity limits
. I f

th e standar di s no t

modified , Blu e Hero n wil l b e require dt o modif y th e feasibility stud y t o identif y mechanism s t o achiev e th e fina l effluent turbidity limit s an dt o implemen t

selecte dmechanism s t o reduc e turbidity , a s require db y thi s schedule
. Schedul e C , Conditio n 3 include s adefaul t perio dregardin g Departmenta l responses .



## 4 0Permi t Evaluatio n Report Blu e Hero n Pape r

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9. 6 Schedul e D - Specia l Condition s Th e followin g Specia l Condition s are include di n Schedul e D o f th e propose dNPDE S permit
.

• Blu e Hero n lan dapplie s solid s fromit s primar y clarifie r for beneficia l use . Th e permi t include s aconditio n statin g that solid s mus t

b e lan dapplie di n accordanc e wit h aDepartmen t approve dindustria l wastewate r solid s managemen t

plan
. Prio r

t o lan dapplyin g solid s from th e ASB , Blu e Hero n mus t submi t aDredgin g Projec t

Managemen t

Pla n (DPMP ) for Departmen t

revie w an dapproval
. Th e permi t specifie s th e element s o f th e DPMP
.

• Sanitary waste s fromth e facilit y mus t remai n route dt o th e Orego n City sanitary sewag e system .

• Pentachloropheno l an dtrichloropheno l shal l no t b e use dfor

biocides
. Zin c hydrosulfit e shal l no t b e use da s ableachin g agent . Schedul e D o f

th e NPDE S permi t

als o include s condition s regardin g re-openin g o f th e NPDE S permi t t o includ e Willamett e Rive r TMD L WLAs , acontingenc y pla n for spill s an dunplanne d discharges , designatio n o f a n environmenta l supervisor , an dimplementatio n o f apollutio n preventio n program . Schedul e D13 , i n particular , relate s t o th e inclusio n o f TMD L wasteloa dallocation s (WLAs)
. Th e Draf t Willamett e TMD L i s currentl y ou t for asecon droun do f

publi c review
. Th e publi c commen t perio dclose s o n May 18 , 2006
. Followin g th e clos e o f th e publi c commen t

period , th e Departmen t

wil l revie w an dconside r al l comment s receive ddurin g th e publi c commen t period
. Followin g thi s review , DE Q wil l modif y th e TMD L i f

necessar y an dapprov e i t a s a n order
. DE Q wil l the n submi t

th e document s t o EP A for approval
. Sinc e ther e i s th e potentia l for th e TMD L t o b e modifie ddurin g thi s process , thi s permi t ha s no t bee n assesse dwit h regar dt o th e draf t TMDL
. Schedul e D1 3 state s that

th e permi t

shal l b e reopene dan dmodifie do r reissue dto incorporat e on e o r mor e wasteloa dallocation s (WLAS ) an dassociate dimplementatio n schedule s (i f any ) resultin g from aTMD L for an y o f th e parameter s associate dwith th e permittee' s discharge
. Schedul e D1 4 o f

th e permi t

require s that , withi n tw o year s o f permi t issuance , Blu e submi t

to th e Departmen t

th e result s o f

aphysica l inspectio n o f

th e diffuse

r for outfal l 001
. Thi s inspectio n shal l consis t

o f visuall y inspectin g th e diffuser port s b y divin g to ensur e that the y ar e intac t

an d functional , an dmeasurin g th e heigh t o f eac h diffuse

r port abov e th e rive r

bottom
. 9. 7 Schedul e F - Genera l Condition s Thes e condition s ar e standar dto al l NPDE S permit s an dinclud e languag e regardin g operatio n an dmaintenanc e o f

facilities , monitorin g an drecor dkeeping , an dreportin g requirements
.



# 4 1Permi t Evaluatio n Report Blu e Hero n Pape r

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1 0 Nex tStep s 10. 1 Publi c Commen t Th e propose dNPDE S permi t wil l b e mad e availabl e for publi c comment . Th e publi c notice , propose dpermi t

an dthi s evaluatio n repor t wil l als o b e poste do n th e Department' s we b page . Publi c notic e o f

th e propose dpermi t

wil l b e maile dt o partie s o n th e Department' s publi c notic e mailin g list s (WQ : P N State , WQ : Clackama s County an dWQ : Al l Permits)
. Th e Departmen t wil l als o plac e notic e i n th e Oregonia n i n th e lega l notic e section
. 10. 2 Publi c Hearin g A publi c hearin g wil l b e schedule dt o provid e informatio n an dto see k comments . A n informatio n sessio n wil l b e provide dat th e beginnin g o f

th e hearin g wit h th e opportunit y for th e publi c t o as k

an y question s the y may hav e abou t th e permit
. Th e Departmen t wil l accep t

writte n o r ora l commen t

at th e publi c hearing
. 10. 3 Respons e t o Comment s Th e Departmen t

wil l respon dto comment s receive ddurin g th e commen t period
. Al l thos e providin g commen t

wil l receive acop y o f

th e Department' s response . Intereste dpartie s may als o reques t acop y o f

th e Department' s response . Onc e comment s ar e receive dan devaluated , th e Departmen t

wil l decid e whethe r

t o issu e th e permi t

a s propose do r

mak e change s t o th e permi t o r den y th e permit
. 10. 4 Modification s t o Fac tShee tan d Permi t Dependin g o n th e natur e o f commen t an dan y change s mad e to th e permi t a s resul t o f comment , thi s fac t shee t an devaluatio n repor t

may b e modified
. Th e Departmen t may als o choos e t o update th e fac t

shee t an devaluatio n repor t

throug h amemorandu mrespondin g t o comment s o n th e propose dNPDE S permit
. 11. 0 Attachment s Attachmen t

A : 200 1 NPDE S Permi t Attachmen t

B : Dissolve dOxyge n Analysi s Attachmen t

C : Reasonabl e Potentia l Analysi s - Outfal l 00 1 Attachmen t

D : Reasonabl e Potentia l Analysi s - Outfal l 00 2 Attachmen t

E : Chlorin e Effluent

Limi t Calculation s - Outfal l 00 2 Attachmen t

F : Outfal l 00 2 Turbidit y Limi t Calculation s Attachmen t

G : Therma l Plum e Calculation s - Outfal l 00 1



## 4 2Permi t Evaluatio n Report Blu e Hero n Pape r

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## Attachmen t

A : 200 1 NPDE S Permi tPermi t Evaluatio n Report Blu e Hero n Pape r

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## Attachmen t

B : Dissolve dOxyge n Analysi sWithou t BH 

## Streeter-Phelp s Dissolve d Oxyge n Mode l



# o . ••<-'

. Effluen t Tem p (C ) DO(mg/L ) BOD5(mg/L ) NH3(mg/L ) Q (mgd ) ^(©2 0 C ) f (calculated ) 34. 5 1 11 0 0 0 0.1 0 2. 5 :** u iV '.'..'River*- r*V.

. Tem p (C ) D O BOD 5 NH 3 Q(cfs ) K d Ks K r Depth(ft ) U (fps ) U (mpd ) K a 2 4 7. 5 0. 3 0.0 3 530 0 0.0 7 0 0.0 7 3 0 0.1 8 2.9 5 0.0 3 note : 

## Calculation s K i K r fmi x Tmi x K a UBOD e UBOD r L o Dosa tmi x D O mi x DO o

blac k entere d value s blu e = calculate d value s 0.17 7 1.70 5 0.08 2 2.97 6 2.97 6 24. 0 0.037 187. 6 1.03 0 1. 0 8. 4 7. 5 0. 9 T correc

t T correc t
297. 2 B H Discharg e

Tcri t Docri t X c 8.9 3

1.1 1 26.2 9 day s mg/ L m i

Mout

h W R 

## R M 0 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 3 0 

## Defici t

0. 9 0. 9 1. 0 1. 0 1. 0 1. 0 1. 0 1. 0 1. 0 1. 0 1. 0 1. 1 1. 1 ls l 1. 1 1. 1 1. 1 1. 1 1. 1 1. 1 1. 1 1. 1 1. 1 1. 1 1. 1 1. 1 1. 1 1. 1 1. 1 1. 1 1. 1

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# L-fWit h B H 

## Streeter-Phelp s Dissolve d Oxyge n Mode l Effluen t Tem p (C ) DO(mg/L ) BOD5(mg/L ) NH3(mg/L ) Q (mgd ) K x (@2 0 C ) f (calculated ) 

## m . ' X Rive r Tem p (C ) D O BOD 5 NH 3 Q(cfs ) K d K s K r Depth(ft ) U (fps ) U (mpd ) K a 34. 5 1 11 0 0 12. 5 0.1 0 2. 5 2 4 7. 5 0. 3 0.0 3 530 0 0.0 7 0 0.0 7 3 0 0.1 8 2.9 5 0.0 3 

### note : 

### Calculation s K , K r f r fmi x Tmi x K a UBOD e UBOD r 

### L o Dosa t mi x D O mi x DO o

blac k = , entere d value s blu e = calculate d value s 0.17 7 1.70 5 0.08 2 2.97 6 2.46 9 24. 0 0.03 7 187. 6 1.03 0 1. 7 8. 4 7. 5 0. 9 T correc t T correc t
297. 2 B H Discharg e



### Tcri t Docri t X c 11.9 2

1.4 4 35.1 2 day

s mg/ L m i

Mout h W R 

## ; R M 0 l 2 3 4 5 6 7 8 9 1 0 1 1 1 2



### . 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 3 0 

## Defici t

0. 9 1. 0 1. 0 1. 0 1. 1 1. 1 1. 1 1. 1 1. 2 1. 2 1. 2 1. 2 1. 3 1* 3 1. 3 1. 3 1. 3 1. 3 1. 3 1. 4 1. 4 1. 4 1. 4 1. 4 1. 4 1. 4 1. 4 1. 4 1. 4 1. 4 1. 4

Pag e 1 

# L-2.Withou t B H



### D O 7.5 0 7.4 8 7.4 7 7.4 5 7.4 4 7.4 3 7.4 1 7.4 0 7.3 9 7.3 8 7.3 7 7.3 6 7.3 6 7.3 5 7.3 4 7.3 4 7.3 3 7.3 3 7.3 2 7.3 2 7.3 2 7.3 2 .7.3 1 7.3 1 7.3 1 7.3 1 7.3 1 7.3 1 7.3 1 7.3 1 7.3 1 

### ^R/tMETER S ^ '
- - -' : ">

• m'Y •,.<."•••..

. C s C o K d K a K s K r X U L o Q r Q e NH 3 Tem p f K x DO o D O saturatio n (mg/L )

initia l D O (mg/L ) effectiv e deoxygenatio n rat e (/day ) reaeratio n rat e (/day ) settlin g rat e (/day ) Kd+K s (/day ) distanc e (ft ) velocit y(fps ) initia l BO D (mg/L ) BOD5/(l-e A -5Kl)^- l flo w (cfs ) flo w (mgd ) ammoni a (mg/L ) degree s C rati o o f UBOD/BOD 5 p . 27 2 CBO D reactio n rate s (bottl e rate ) Initia l D O defici t (afte rmixing )

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### D O 7.4 8 7.4 4 7.4 1 7.3 8 7.3 5 7.3 2 7.2 9 7.2 7 7.2 4 7.2 2 7.2 0 7.1 8 7.1 6 7.1 4 7.1 2 7.1 1 7.0 9 7.0 8 7.0 7 7.0 6 7.0 4 7.0 4 7.0 3 7.0 2 7.0 1 7.0 0 7.0 0 6.9 9 6.9 9 6.9 9 6.9 8 

### PARA M

C s C o K d K a K s K r X U L o 

### Q r Q e NH 3 Tem p f K i DO o 

### EFER S :•

* 'r' - - ' *

. : D O saturatio n (mg/L ) initia l D O (mg/L ) effectiv e deoxygenatio n rat e (/day ) reaeratio n rat e (/day ) settlin g rat e (/day ) Kd+K s (/day ) distanc e (ft ) velocit y(fps ) initia l BO D (mg/L ) BOD5/(l-e^-5Kl) A

- l flo w (cfs ) flo w (mgd ) ammoni a (mg/L ) degree s C rati o o f UBOD/BOD 5 p . 27 2 CBO D reactio n rate s (bottl e rate ) Initia l D O defici t (afte rmixing )

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# L~1Permi t Evaluatio n Report Blu e Hero n Pape r

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## Attachmen t

C : Reasonabl e Potentia l Analysi s - Outfal l 00 1Attachmen t C - Reasonabl e Potentia l Analysi s fo r Outfal l 00 1 Dilutio n Values ? (Y/N ) Dilutio n @ ZI D Dilutio n @ MZ Y 3 3 7 0 I f n o dilutio n value s ente rinf o belo w FacilityEffluen t Flow 7Q1 0 1Q1 0 % dilutio n a t ZI D % dilutio n a t M Z Fres h Water ? (Y/N ) * * * * * Y calculate d * * MG D CF S CF S % % Hardnes s Effluen t Strea m Mixe d ZI D M Z mg/ L caco 3 14 0 2 5 2 8 2 7 (Hardnes s value s shoul d b e >2 5 an d <40 0 mg/L )

Confidenc e Leve l Probabilit yBasi s 99 % 99 %

PARAMETE R ALUMINU M (Total ) ARSENI C II I (inorganic ) CADMIU M + COPPE R + LEA D + MERCUR Y NICKE L + SILVE R + ZIN C + IRO N TOTA L CHROMIUM t # o f Sample s 1 2 0 1 1 1 1 4 9 1 1 1 1 1 3 6 1 1 1 Highes t Cone

. MQ/I 0.2 7 10.0 0 0.5 0 11.6 0 7.6 0 0.0002 5 16.0 0 0.1 0 284.0 0 387.0 0 6.2 9 Coef

. o f Variene e 0.6 0 0.4 5 0.4 7 0.5 0 0.7 3 0.6 0 0.2 5 0.5 9 0.2 0 0.6 0 0.3 7 Maximu m Effluen t Cone

. MQ/ I 3.6 0 19.0 0 1.2 0 29.0 0 14.4 4 0.0033 0 25.6 0 0.2 9 369.2 0 5108.4 0 12.5 8 Backgroun d

Cone

. MQ/ i 0.4 0 0. 6 0.01 0 1. 3 0.3 0 0.0006 4 0.5 2 0.0 1 3.3 2 539.0 0 0.6 0 Maximu m Cone , a t ZI D MO/! 0.5 0 1.1 4 0.0 5 2.1 4 0.7 3 0.0007 2 1.2 8 0.0 2 14.4 1 677.4 7 0.9 6 Maximu m Cone , a t M Z MQ/I 0.4 5 0.8 4 0.0 3 1.7 0 0.5 0 0.0 0 0.8 8 0.0 1 8.5 5 604.2 8 0.7 7 WQ CRITERI A IHou r (CMC ) M9/ I 750.0 0 36 0 0.8 8 5.4 3 16.5 1 2.4 0 490. 2 0.4 7 40.3 8 * 555.6 0 4 Da

y (CCC) M9/ I 87.0 0 19 0 0.4 0 3.8 2 0.6 4 0.01 2 54. 5 0.1 2 34.5 6 1000.0 0 75.3 2 REASONABLE

POTENTIA L ? ACUT E N O N O N O N O N O N O N O N O N O ~ N O CHRONI C

N O N O N O N O N O N O N O N O N O N O N OPermi t Evaluatio n Report Blu e Hero n Pape r

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## Attachmen t

D : Reasonabl e Potentia l Analysi s - Outfal l 00 2Attachemen t D - Reasonabl e Potentia l Analysi s fo r Outfal l 00 2 Dilutio n Values ? (Y/N ) Lo w Flo w Dilutio n @ ZI D (1Q10 ) Lo w Flo w Dilutio n @ M

Z (7Q10 ) Lo w Flo w Dilutio n @ MZ (30Q5 ) Hig h Flo w Dilutio n <§

! ZI D (1Q10) Hig h Flo w Dilutio n @ M

Z (7Q10 ) Hig h Flo w Dilutio n @ M

Z (30Q5 ) Y

2 1 4 1 4 2 1 4 1 4 o'SllUlafeiO ;

1. 1 1. 2 1. 2 1. 1 1. 2 1. 2 Ente r dat a belo wi f n o dilutio n dat a i s availabl e Dat a t o estimat e dilutio n

Effluen t Flo

w (mgd ) = 1Q1 0 (CFS

) = 7Q1 0 (CFS) = 30Q 5 (CFS ) = % dilutio n a t M

Z = % dilutio n a t ZI D = Summe r 1 1 1 1 2 5 1 0 Winte r

1 1 1 1 2 5 1 0 Confidence Leve l = Probabilit yBasi s = 99 %

95 % Summe r dat a pH * = Tem p * = Alkalinity= Salmonid s Present? (Y/N ) Salmoni d Spawning ? (Y/N ) Fres h Wate r? (Y/N ) Salinit y(ppt ) wiptifeiaiij ^ pH * =

Tem p * = Alkalinity= Salmonid s Present? (Y/N ) Salmoni d Spawning ? (Y/N ) Fres h Wate r? (Y/N ) Salinit y(ppt ) Effluen t

7 20. 5 2 5

0 7 18. 5 2 5

0 Strea m

7. 5 2 0 2 5 y y y 0 7. 5 1 8 2 5 y y y 0 Mixe d

ZI D 7. 2 20. 3

0. 0 7. 2 18. 3

0. 0 M Z

7. 4 20. 0

0. 0 7. 4 18. 0

0. 0 ( 6.5- 9 )

° C

( 6.5- 9 ) ° C

PARAMETE R Lo wFlo wSeaso n CHLORIN E AMMONI A - Existing * AMMONIA -

Proposed

lhr/4day* AMMONIA -

Proposed

30day* Hig h Flo wSeaso n CHLORIN E AMMONI A - Existing * AMMONIA -

Proposed

lhr/4day* AMMONIA -

Proposed

SOday* # o f

Sample s
2 * * * 2 * * * Highes t

Cone . mg/ l 0.34 0 0.00 0 0.00 0 0.00 0 0.34 0 0.00 0 0.00 0 0.00 0 Coef . o f Varianc e
0.6 0 * * * 0.6 0 * * * Calculate d Maximu m Cone . mg/ l 1.73 4 * * * 1.73 4 * * * Backgroun d Cone . mg/ l 0.0 0 * * * 0.0 0 * * * Maximu m Cone , a t ZI D mg/ l 0.86 7 * * n/ a 0.86 7 * * n/ a Maximu m Cone , a t M Z mg/ l 0.12 4 * * * 0.12 4 * * * W Q CRITERI A Acut e (CMC ) mg/ l 0.01 9 16. 5 20. 1 n/ a 0.01 9 17. 0 20. 1 n/ a Chroni c (CCC ) mg/ l 0.01 1 1.2 3 8. 1 3. 2 0.01 1 1. 4 9. 2 3. 7 REASONABL E POTENTIA L ? ACUT E YE S * * n/ a YE S * * n/ a CHRONI C

YE S * * * YE S * * * -NOTE S : Temperatur e mus t b e betwee n 0 an d 3 0 ° C

p H mus t b e betwee n 6. 5 an d 9 Ammoni a i s tota l ammoni a a s N Proposed

ammonia

criteria note: As of February

2005, continue

to use the existing criteria. The proposed

criteria are there for comparison

- the proposed

standard

has a lhr and 4 day criterioi iike the existing standard. In

addition the proposed

standard

also contains a 30 day average criterion. The saltwater

criteria remains unchangea Fo routfal l 002 , th e discharg e i s intermitten t (onc e ever y8 hours ) an d 3 0 minute s i n duration

. Th e acut e standards , includin g th e standar d fo rchlorine , stat e tha t th e numeri c criteri a ar e averag e one-hou rconcentrations

. A dilutio n o f 2 i s give n a s th e dilutio n a t th e ZI D t o averag e th e concentratio n ove ra one-hou r perio d (6 0 min/3 0 min)

. Sinc e n o ZI D i s define d a t outfal l 002 , n o additiona l dilutio n i s give n an d th e standar d mus t b e me t a t th e en d o f th e discharg e pipe

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## Attachmen t

E : Chlorin e Effluen t

Limi t Calculation s - Outfal l 00 2Attachmen t E - Outfal l 00 2 Chlorin e Effluen t Limitatio n Dilutio n Values ? (Y/N ) Low Flow Dilutio n @ ZI D (1Q10 ) Low Flow Dilutio n @ MZ (7Q10 ) Low Flow Dilutio n @ M Z (30Q5 ) Hig h Flow Dilutio n @ ZI D (1Q10 ) Hig h Flow Dilutio n @ M Z (7Q10 ) Hig h Flow Dilutio n @

M Z (30Q5 ) I f n o dilutio n value s Ente r flo wrate s her e

Effluen t Flow (MGD ) 1Q1 0 (CFS ) 7Q1 0 (CFS ) 30Q 5 (CFS ) % dilutio n a t MZ % dilutio n a t ZI D probabilit ybasi s (WL A multipliers ) Y 2 1 4 1 4 2 1 4 1 4 Summe r 1 1 1 1 2 5 1 0 99 % calculate d

1. 1 1. 2 1. 2 1. 1 1. 2 1. 2 Winte r 1 1 1 1 2 5 1 0 Summe r dat a p H * = Tem p * = Alkalinit y= Salmonid s Present ? (Y/N) Salmoni d Spawning ? (Y/N) Fres h Wate r? (Y/N )

Salinit y )piigjrajg|a; : .,,,.., .

p H * = Tem p * = Alkalinit y= Salmonid s Present ? (Y/N) Salmoni d Sapwnin g (Y/N) Fres h Wate r? (Y/N )

Salinit y Effluen t

7 22. 5 2 5

0 7 18. 5 2 5

0 Strea m

7. 5 2 2 2 5 y y y 2 0 7. 5 1 8 2 5 y y y 2 0 Mixe d

ZI D 7. 2 22. 3 M Z

7Q1 0 7. 4 22. 0 M Z 30Q 5 7. 4 22. 0 ( 6.5- 9 )

° C

10. 0 7. 2 18. 3 18. 6

7. 4 18. 0 18. 6

7. 4 18. 0 ( 6.5- 9 )

° C

10. 0 18. 6

PARAMETE R Lo wFlo wSeaso n CHLORIN E AMMONI A - 198 6 AMMONI A - 199 9 Hig h Flo wSeaso n CHLORIN E AMMONI A - 198 6 AMMONI A -199 9 WATE R QUALIT Y CRITERI A IHou r (CMC ) mg/ l 0.01 9 14. 3 20. 1 0.01 9 17. 0 20. 1 4 Da y (CCC ) mg/ l 0.01 1 1. 1 7. 1 0.01 1 1. 4 9. 2 3 0 Da y (CCC ) mg/ l n/ a n/ a 2. 8 n/ a n/ a 3. 7 Back groun d mg/ l 0.0 0 * * 0.0 0 * * Allocation s Acut e mg/ l 0.0 4 * * 0.0 4 * * 4 Da y

mg/ l 0.1 5 * * 0.1 5 * * 3 0 Da y

mg/ L n/ a n/ a * n/ a n/ a * C V

0. 6 * * 0. 6 * * #

Sample s /M o 1 * * 1 4 4 Acut e LT A mg/ l 0.0 1 * * 0.0 1 * * 4 da y

LT A mg/ l 0.0 8 * * 0.0 8 * * 3 0 da y

LT A mg/ L n/ a n/ a * n/ a n/ a * Mi n

LT A mg/ l 0.0 1 0.0 0 0.0 0 0.0 1 0.0 0 0.0 0 APPLICABL E PERMI T LIMIT S CONCENTRATIO N 95 % Monthl y mg/ l n/ a * * n/ a * * 99 %

Dail y mg/ l 0.0 4 * * 0.0 4 * * NOTE S : Temperatur e mus t b e betwee n 0 an d 3 0 ° C p H mus t b e betwee n 6. 5 an d 9 Ammoni a i s mg/ l ammoni a a s N

. Fo routfal l 002 , th e discharg e i s intermitten t (onc e ever y 8 hours ) an d 3 0 minute s i n duration

. Th e acut e standards , includin g th e standar d fo rchlorine , stat e tha t th e numeri c criteri a are averag e one-hou rconcentrations

. A dilutio n o f 2 i s give n a s th e dilutio n a t th e ZI D t o averag e th e concentratio n ove ra one-hou rperio d (6 0 min/3 0 min)

. Sinc

e n o ZI D i s define d a t outfal l 002 , n o additiona l dilutio n i s give n an d th e standar d mus t b e me t a t th e en d o f th e discharg e pipe

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## Attachmen t

F : Outfal l 00 2 Turbidit y Limi t Calculation s

### Attachmen tF - Blu e Hero n Outfal l 00 2 Turbidit y Effluen tLimit s Calculation s

Allowabl e Effluent

Turbidity Fro mmas s balanc e equation :

Where : C e 

### i s th e allowabl e turbidit y o f th e effluent

(NTU) ; C m z 

### i s th e allowabl e turbidit y a t th e edg e o f

th e mixin g zon e (10 % abov e background)(NTU) ; C a

### i s th e ambien t

(background ) turbidit y (NTU ) Backgroun dTurbidity Backgroun dvalue s ar e basedo n media n values o f monitorin g dat aa

t th e Willamett e Rive r @ Canb y Ferr y sit e (fro mth e Wes t Lin n Pape r

Co
. PE R[p
. 13] ) Summe r (5/ 1 - 10/31) : C a 

### = 4 NT U Winte r (11/ 1 - 4/30) : C a 

### = 1 0 NT U Accountin g for

intermitten t

discharge s Assumin g adischarg e duratio n o f 3 0 min
. every 8 hrs , th e allowabl e turbidit y level s a t th e MZ B (C mz 

### ) resultin g i n atim e average dincreas e o f 10 % ove r

backgroun dwoul dbe : C mz 

### (0. 5 hr ) + C a 

### (7. 5 hr ) = C a 

### (l.l)( 8 hr ) Summer : C a 

### =4NT U

C m z 

### = 10. 4 NT U Winter : C a 

### =10NT U

C m z 

### = 2 6 NT U Effluent Limit s

^ e (.^m z ^a y & "" " L' a 

### Summer : S = 1 4

C a 

### =4NT U C m z 

### = 10. 4 NT U C e 

### = 9 4 NT U (a s adail y max ) Winter : (Assume ) S = 1 4

C a 

### =10NT U C m z 

### =2 6 NT U C e 

### = 23 4 NT U (a s adail y max )Permi t Evaluatio n Report Blu e Hero n Pape r

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## Attachmen t

G : Therma l Plum e Analyse s - Outfal l 00 1Blu e Hero n Therma l Plum e Analyse s

Th e followin g ar e th e analyse s an dcalculation s supportin g th e determinatio n o f permi t complianc e wit h th e Temperatur e Therma l Plum e Limitation s OA R340-041-0053(d)(B ) throug h (D)
. OA R340-041-0053(d)(B ) Analysi s • OA R340-041-0053(d)(B) : Acut e impairmen t o r instantaneou s lethalit y i s prevente do r minimize db y limitin g potentia l fis h exposur e t o temperature s o f 3 2 ° C o r mor e t o les s tha n 2 seconds
. Critica l condition s o Ambien t

flo w (7Q10 ) = 578 9 cf

s o Dail y maximu meffluent temperatur e (T ps ) = 3 5 ° C o Effluent

flo w = 6. 8 MG D (lo w flo w for summe r seaso n - critica l immediat e dilutio n i s minimize da t

lowe r effluent flows/velocities
. Fro mfigure 3- 1 o f 5/0 5 B H turbidity study ) o Dail y maximu mambien t temperatur e at

diffuse r (T R) = 24. 8 ° C (measure do n 7/25/0 3 - Fro mB.H
. monitoring ) Th e visua l plumes/UM 3 mode l outpu t for thes e condition s give s acenterlin e dilutio n o f 2. 6 at 1.9 7 seconds
. Tmi x = [(Qp S *T p s )+(Qentram*T R )]/ ( Q p s + Qentra m) =[(1*35)+(1.6*24.8)]/(1+1.6 )

= 28.7° C After tw o second s o f

trave l th e centerlin e (spatia l peak ) temperatur e downstrea mo f th e diffuse

r i s 28. 7 °C
. (Temperature s away fromth e centerlin e wil l b e lower. ) Therefore , unde r

awors t cas e scenario , th e temperatur e at th e centerlin e o f

th e plum e a s i t

move s downstrea mo f

eac h individua l diffuse

r port drop s from35° C t o 28.7° C withi n 2 seconds
. Fis h exposur e t o temperature s ove r 32° C wil l b e for

les s tha n 2 seconds
. OA R340-041-0053(d)(C ) Analysi s • OA R340-041-0053(d)(C) : Therma l shoc k cause db y asudde n increas e i n wate r temperatur e i s prevente do r

minimize db y limitin g potentia l fis h exposur e t o temperature s o f 2 5 ° C o r mor e t o les s tha n 5 % o f

th e cross-sectio n o f

100 % o f th e 7Q1 0 flo w o f

th e waterbody
. Critica l condition s o Ambien t

flo w (7Q10 ) = 578 9 cf

s o Dail y maximu meffluent temperatur e (T ps ) = 3 5 ° C o Effluent

flo w =10. 5 MG D (critica l dilutio n i s at maximu mflow ) o Dail y maximu mambien t temperatur e at

diffuse r (T R) = 24. 8 ° C (measure do n 7/25/0 3 - Fro mB.H
. monitoring ) o Approximat e rive r

cross-sectiona l are aa t

7Q1 0 lo w flow : 24,00 0 ft 2 (base do n dat e from Tabl e 5- 1 o f

th e Dilution Peformance Field Verifications & Modeling Study, CH2MHH1 , 10/2002)

. Fiv e percen t

o f th e 7Q1 0 lo w flo w cross-sectiona l are ai s 120 0 ft 2 (11 2 m 2 )
. Thi s equate s t o an individua l plum e diamete r o f 4. 2 m 2Fro mVisua l Plumes/UM 3 modelin g outpu t for th e critica l conditions , th e dilutio n at thi s plum e diamete r i s 33.2
. (Thi s occur s at

6. 9 mdownstrea man d1.365 mu p fro mth e diffuser , jus t prio r t o plum e merging)
. Base do n thes e data , th e temperatur e o f th e plum e at

5 % o f 7Q1 0 lo w flo w cross-sectiona l are ais :
Tmi x = [(Qp S *T p s )+(Qentram*T R )]/ ( Q p s + Qentra m) =[(l*35)+(32.2*24.8)]/(l+32.2 )
= 25.1° C Therefore , whe n th e plum e are ai s 5 % o f 7Q1 0 lo w flo w cross-sectiona l are aan dth e rive r an d discharg e ar e at

critica l conditions , th e expecte dincreas e i n rive r temperatur e i s 0. 3 °C
. A s explaine di n Sectio n 7.1.4 , an increas e thi s smal l wil l no t resul t i n therma l shoc k

an di s considere ddeminimis
. OA R340-041-0053(d)(D ) Analysi s • OA R340-041-0053(d)(D) : Unles s ambien t temperatur e i s 2 1 ° C o r

greater , migratio n blockag e i s prevente do r

minimize db y limitin g potentia l fish exposur e to temperature s o f 2 1 ° C o r mor e t o les s tha n 25 % o f

th e cross-sectio n o f

100 % o f th e 7Q1 0 flo w o f

th e waterbody
. Critica l condition s o Ambien t

flo w (7Q10 ) = 578 9 cf

s o 7 day averag e o f

th e dail y maximu meffluent temperatur e (T ps ) = 3 3 ° C (Th e 7 day averag e o f

th e dail y maximu meffluent temperatur e i s considere dth e appropriat e metri c for migration considerations. ) o Effluent

flo w =10. 5 MG D (critica l dilutio n i s at maximu mflow ) o 7 day averag e o f

th e dail y maximu mambien t temperatur e (T R) = 20.9° C (Critica l maximu mambien t

temperatur e i s assume dt o b e 20.9° C [jus t prio r t o attainin g 2 1 °C] ) o Approximat e rive r

cross-sectiona l are aa t

7Q1 0 lo w flow : 24,00 0 ft 2 (base do n dat e from Tabl e 5- 1 o f

th e Dilution Peformance Field Verifications & Modeling Study, CH2MHH1 , 10/2002)

. 2 5 percen t

o f th e 7Q1 0 lo w flo w cross-sectiona l are ai s 600 0 ft 2 (55 8 m 2 )
. Assumin g th e plum e i s fully mixe dverticall y acros s th e 9. 2 maverag e loca l depth (thi s i s aconservativ e assumption) , th e approximat e width at

thi s are ai s 60. 7 m(558m/9.2m)
. Fro mVisua l Plumes/UM 3 modelin g outpu t for th e critica l conditions , th e dilutio n at thi s plum e widt h i s 113.5
. Base do n thes e data , th e temperatur e o f th e plum e at

25 % o f 7Q1 0 lo w flo w cross-sectiona l are a is : Tmi x = [(Q ps *T ps )+(Q entram *T R )]/ ( Q p s + CVam ) =[(1*33)+(112.5*20.9)]/(1+112.5 )
= 21.0° C Therefore , whe n th e plum e are ai s 25 % o f 7Q1 0 lo w flo w cross-sectiona l are aan dth e rive r an d discharg e ar e at

critica l conditions , th e expecte dincreas e i n rive r temperatur e i s 0. 1 °C
. A s explaine di n Sectio n 7.1.4 , an increas e thi s smal l wil l no t resul t i n migration blockag e an di s considere ddeminimis
.