## ASTORI A FAC T SHEE T An d NPDE S WASTEWATE RDISCHARGE PERMI T EVALUATIO N

Orego n Departmen t

o f Environmenta l Qualit

y Northwes t

Regio n - Portlan dOffic e 202 0 S W 4t

h Ave. , Suit e 400 , Portland , O R9720 1 Telephone : (503 ) 229-526 3 & FA X 50 3 229-695 7

Fil e Number : 392

4 Permi t Number : 102397 Permi t Applicatio n Number : 97703 1 Permi t Applicatio n Date : Septembe r 20,200 6 Permittee : Cit y o f Astori a 109 5 Duan e Stree t Astoria , O R9710 3 Sourc e Contact : Ken Coo k Publi c Work

s Directo r Telephone Number : 503.338.517 3 Propose d Action : Renewa l o f aNationa l Pollutan t Discharg e Elimination Syste m (NPDES ) wastewate

r discharg e permit . Receivin g Stream : Columbi aRive r (Rive r Mil e 18.0 ) StreamLocation ; Clatso

p Count y

Sourc e Location : Treatmen t facilit y i s locate da t th e en do f 53 r d 

### Stree t in Astoria , Orego

n

Permi t Writer : Garr y L . Sage , EI

T WQ-NWR

- Sourc e Contro

l Sectio n Telephon e Number : 503.229.569 0 Sourc e Categoiy : Majo

r Domestic Treatmen t

Syste mClass : Leve

l I I Collectio n Syste

mClass : Leve

l I VCit

y o f Astori aEvaluatio n Repor t Pag e 2 o f 2 4 TABL E O F CONTENT S PAG E Propose dChange s t o Thi s Permi t 4 Facilit y Backgroun d5 Introductio n 5 Facilit y Descriptio n 5 Biosolid s Managemen t

an dUtilizatio n 6 Inflo w an dInfiltratio n (I&I ) 6 Pretreatmen t

7 Pollutant s Discharge d7 Beneficia l Us e Analysi s 9 Receivin g Strea

mWate r Qualit y (WQ ) Impact s 9 Mixin g Zon e Analysis . 9 Tota l Maximu mDail y Load s (TMDLs ) fo r Mai n Ste mColumbi aR... . 1 0 Temperature Analysi s 1 0 Bacteri a1 1 Chlorin e Toxicity 1 2 Ammoni aToxicity 1 3 Dissolve dOxyge n Reductio n 1 3 Groundwater

1 3 p H 1 3 Toxic s Analysi s , 1 4 Permi t Histoi y 1 4 Anti-degradatio n Revie w 1 4 Complianc e Histoi y 1 4 Permi t Discussio n 1 5 Fac e Pag e 1 5 Schedul e A - Wast e Discharg e limitation s 1 5 Treate dEffluen

t Discharge da

t Outfal l 03 9 1 5 Discharg e Season s 1 6 BOD 5 an dTS S Concentratio n an d Mas s Limit s 1 6 BOD 5 an dTS S Removal Efficienc y (Summer Season ) 1 7 BOD 5 an dTS S Remova l Efficienc y (Winte r Season ) 1 7 p H Limit s 1 8 Temperature Limits.. . 1 8 Bacteri a1 8 Chlorin e Residual 1 9 Ammoni a1 9 Mixin g Zon e an dZon e o f

Immediat e Dilutio n 1 9 CS O Outfall s (001

- 038 ) 2 0 Groundwater

Protectio n 2 0 Schedul e B - Minimu mMonitorin g an dReportin g Requirement s 2 0 Influen t Samplin g 2 0 Influen t Measuremen t

an dSamplin g 2 0 Effluen t Samplin g fo

r Outfal l 03 9 2 1Cit

y o f Astori aEvaluatio n Repor t Pag e 3 o f 2 4 PAG E Measuremen t

& Samplin g o f

Year-Aroun d Effluen

t Parameter s 2 1 Temperatur e Measurement s (Ma y 2 2 - October

14 ) 2 1 Ambien t Metal s Testin g fo

r th e Columbi aRive r

2 2 CS O Outfal l Monitorin g (Outfall s 001-038 ) 2 2 Discharg e Monitorin g Report (DMR ) Procedure s 2 2 WE T Testing . 2 2 Fiv e Da y Reportin g o f

SSO s 2 2 Schedul e C - Complianc e Schedule s an d Condition s 2 2 Schedul e D - Special Condition s 2 3 1 . Operato r

Certificatio n 2 3 2 . Groundwate r

2 3 3 . Whol e Effluent

Toxicity (WET ) Testin g 2 3 4 . Emergenc y Respons e an d Publi c Notificatio n Pla n 2 3 5 . Notificatio n 2 4 6 . Facility Plannin g to Improv e Winte r % Removal s 2 4 Schedule- E - Pretreatmen t 2 4 Schedule- F - General Condition s 2 4 Attachment s 1 . Treatmen t

Facilit y Desig n Criteri a& Backgroun d Informatio n 2 . Discharg e Monitorin g Repor t Dat aSummarie s 3 . BOD 5 an dTS S Percentag e Removal Analysi s 4 . Chlorin e & Ammoni aRP A for Toxicit y 5 . Chlorin e Limit s 6 . Antibacksliding/Antidegradatio n Revie w 7 . Designate dBeneficia l Use s fo r th e Mai n Ste mColumbi aRiver 8 . Basin-Specifi c Criteri a(Mai n Ste mColumbi aRiver ) 9 . Oregon' s 201 0 Integrate d Repor t Databas e (WQL Statu s for Lower Columbi a River ) 10 . Temperatur e RP A 11 . Dissolve dOxyge n RP A (Streeter-Phelp s D O Model ) 12 . Columbi aRive r

pH , Alkalinity , & Temperature Dat a 13 . pHRP A 14 . Metal s RP A 15 . Amende dStipulatio n & Final Order (ASFO ) No . WQMW-NWR-92-24 7 16 . Permi t

Milestone s 17 . CS O Outfall s (001-038 )Cit

y o f Astori aEvaluatio n Repor t Pag e 4 o f 2 4 Propose d Change s t

o Thi s Permi t Schedule- A 1 ) Summe r

seaso n i s redefine da s Ma y 2 2 throug h October

14 , an d winte r

seaso n a s October

1 5 throug h Ma

y 2 1 [base do n amende dstipulatio n an d fina l orde r (ASFO ) WQMW-NWR-92-24 7 signe d o n October

29 , 2010] . 2 ) Winte r

effluen t mas s load s are increase d base d o n th e desig n averag e we t weather flo w (AWWF ) approve db y DE Q o n Decembe r 7,2009 . 3 ) Summer

seaso n BOD 5 an dTS S percentag e monthl y averag e remova l limit s are increase d t o 65 % t o compl y with th e federa l "significan t

biological treatment " an d "equivalen t to secondai y treatment " definitions . 4 ) BOD 5 an

dTS S percentag e removal s are calculate d differently for th e month s o f

April-May

Jun e an dSeptember-October-November . 5 ) Interim an d final

limit s for

bacteri aare listed . Final limit s fo r feca l colifor man d enterococc i bacteri areplac e current , interim __ . coll bacteri alimit s o n o r

before completio n o f

Schedule- C construction . Final

feca l colifor man d enterococc i limit s ar e adde d t o compl y wit h DEQ' s internal management

directiv e (IMD ) - "Bacteri aCriteri afo r Marin e an d Estuarin e Waters " (Sectio n 10.0 , Table-1) . 6 ) Interim an d final

limit s fo r chlorin e residua l are liste d subjec t t o Schedule- C for

re-constructio n o f th e chlorin e contac t chamber , an d th e additio n o f dechlorinatio n an

d p H monitoring/adjustmen t

facilities . Year-around , final effluen t chlorin e residual limit s fo r dail y maximu man dmonthl y averag e are mor e stringent than current

chlorin e limits . 7 ) Ammoni alimit s are remove dfro mth e permi t per Sectio n 303(d)(4 ) o f

th e Clea n Water Ac t (CWA) ; sinc e th e Columbi aRive r i s no t water qualit y limite d (WQL ) fo

r ammoni aand/o r dissolve doxygen . Th e removal o f ammoni alimit s complie s with Oregon' s antidegradatio n rule s under

OAR340-041-0004 . A n ammoni areasonabl e potentia l analysi s (RPA ) support s th e eliminatio n o f

ammoni alimit s pe r

complianc e wit

h WQBELs . Schedule- B 1 ) Ad dcalculatio n fo

r monthl y averag e chlorin e residua l concentration . 2 ) Ad dcalculatio n fo

r monthl y averag e ammoni aconcentratio n [ammoni amonitorin g i s retaine d i n renewal permi t

eve n thoug h limit s are droppe d (se e above)] . 3 ) Ad d calculation s fo

r BOD 5 an dTS S monthl y averag e concentration . 4 ) Provid e on e sampl e eac h pe r week fo r feca l colifor man d enterococc i bacteria . Calculate monthl y median an dpercen t exceedin g 4 3 organism s per 100 mL fo

r feca l colifor mbacteria . Calculate monthl y geometri c mean for enterococc i bacteria . 5 ) Repor t sewag e solid s relocatio n &/or transpor t events . 6 ) Reduc e temperatur e monitorin g fo r influent , effluent , an d Columbi aRiver maximu m temperature t o on e annual measuremen t durin g Augus t

fo r eac h parameter . 7 ) Modif y "year-aroun d CS O reportin g requirements " t o compl y wit h ASF O WQMW-NWR-92

- 24 7 language . 8 ) Dro p requirement s for measuremen t

o f Columbi aRive r

salinit y an d velocit

y [no t neede d sinc e mixin g zon e (MZ ) study i s complete] . 9 ) Ad dambient

testin g for

Columbi aRive r

metal s (quarterl y for

firs t tw o years , an d semi-annual (winte r an dsummer ) fo r

duratio n o f

th e renewal permit) . 10 ) Annual WET testin g pe r Schedule- D i s referenced . 11 ) Sanitar y sewer overflo w (SSO ) reportin g requirement s ar e added . Schedule- C 1 ) Schedule- C list s acomplianc e schedul e fo r permittee' s reconstructio n o f th e chlorin e contac t basin , an dth e additio n o f

dechlorinatio n an d p H monitoring/adjustmen t equipment . Schedule

C complie s wit

h DEQ' s internal management directiv e (IMD ) fo

r Complianc e Schedule s i n NPDE S permits .Cit

y o f Astori aEvaluatio n Repor t Pag e 5 o f 2 4 Schedule- D 1 ) A groundwater

protectio n claus e (Ite mNo . 2 ) i s added . 2 ) Whol e effluen

t toxicity (WET ) testin g requirement s for discharg e t o fres h water

are updated , an d amiua l testin g i s required . 3 ) Ite mNo . 6 i s adde dt o gai n additional informatio n o n treatmen t potential fo

r improvin g winte r seaso n BOD 5 an dTS S percen t removal levels . Submittal o f a n approvabl e facilitie s pla n i s require dwithi n 6-month s o f permi t issuance . Schedule- F 1 ) Schedule- F wa s extensivel y revise dt o compl y wit h recen t EP A Region-1 0 mandate d changes . 2 ) Schedule- F clarifie s event reportin g fo

r permi t violation s an d wastewate r overflows . . Facilit y Backgroun d Introductio n Th e Cit y o f Astori aoperate s awastewate r treatmen t

facilit y locate d o n th e sout

h ban k o f th e Columbi aRive r

withi n cit

y limit s (Attachment-1) . Wastewater (sewage ) i s treate d an d discharge d t o th e Columbi aRive r

year-aroun da

t rive r mil e 18.0 , i n accordanc e wit h Nationa l Pollutan t Discharg e Eliminatio n Syste m(NPDES ) Permi t number 102397 . Th e current

permi t for thi s facilit y wa s issue do n Februar

y 15,200 2 an d expire d o n Januar y 31 , 2007 . Th e Departmen t

receive dapermi t

renewal applicatio n o n Septembe r 20,2006 . A renewal permi t i s necessary t o discharg e t o stat e water s pursuan t t o provision s o f

Orego n Revise d Statute s (ORS ) 468B.05 0 an dth e Federa l Clean Wate r Act . Th e Departmen t

propose s t o rene w th e permit . Currentl y th e permi t

i s unde r administrativ e continuatio n pendin g it s renewal . Facilit y Descriptio n Astoria' s wastewate r

treatmen t

facility i s a3-cel l facultativ e lagoo n desig n with headworks , chlorin e contac t

chamber , an dmechanica l aeratio n tha t wa s constructe d i n 197 4 (Attachment-1) . Th e pond s provid e atreatmen t leve l "equivalen t

t o secondary treatment, " pe r 4 0 CFRPar

t 133.105 . Lagoo n aeratio n i s designe dt o reduc e effluen t BOD 5 an d ammonia . Chlorin e i s use d for effluent disinfection . Dechlorinatio n an d p H adjustment/monitorin g equipmen t are currentl y no t installe da t

this facility . Th e existin g chlorin e contac t basi n mus t

b e rebuil t

t o improv e bacteri akil l t o ensur e tha t th e facilit y can mee t

propose d limit s fo r

fecal colifor

man d enterococc i bacteri a(se e complianc e Schedule-C) . Th e enginee r

wh o designe dth e facilit y determine d th e desig n averag e dr y weathe r

flo w (ADWF) . I t

i s th e estimate dmaximumdail y averag e dr y weathe r flo w (May 1 t o Octobe r 31 ) a t whic h th e desig n enginee r expect s th e treatmen t

facilit y t o consistentl y mee t

al l effluent

limits . Di y weathe r

flow s d o no t

includ e th e hig h level s o f infiltratio n an d inflo w (I&I ) tha t are associate dwith Orego n winter s o n th e wes t sid e o f th e Cascad e Mountains . Therefore , th e desig n ADW F i s use dmostl y t o estimat e ho w muc h treatmen t capacity ther e i s for

organi c loads . Fo r this facility , th e desig n ADW F = 4. 2 millio n gallon s pe r day (MGD) . Th e curren t actua l averag e dr

y weather , monthl y influen t flow (Ma

y 1 t o Octobe r

31 ) fo r Year s 2005-201 0 wa s 2. 2Cit

y o f Astori aEvaluatio n Repor t Pag e 6 o f 2 4 MG D (Attachment-2) . Th e peak month dr

y weathe r influent flo w ove r

th e interva l Ma

y 200 5 throug h Jul y 201 0 wa s 12. 0 MG D (Octobe r 2009) . Currently , this facilit y operate s a

t 52 % o f it s organi c treatmen t

capacity . Durin g winte r

seaso n fo r

Year s 2005-2010 , th e averag e influent monthl y facility flo w wa s 6. 4 MGD , an dth e pea

k monthl y influent

flow wa s 19. 4 MG D (Attachment-2) . Fo r this facility , th e desig n averag e we t

weathe r flo w (AWWF ) = 12. 6 MGD , an d th e desig n peak we t weathe r flo w (PWWF ) i s approximatel y 20. 0 MGD . Desig n we t weathe r flows represen t

availabl e winte r seaso n treatmen t

capacity a

t this facility . Base d o n recen t treatmen t

performance , this facilit

y i s operatin g a

t 51 % o f it s winte r seaso n averag e monthl y capacity . Se e th e sectio n belo w o n I& I for additiona l discussio n o f

winte r flows, hydrauli c capacity , an d combine d sewe r overflow s (CSOs) . Biosolid s Managemen tan d Utilizatio n A biosolid s managemen t

pla n (BMP ) i s currentl y no t require d for

this source . Th e Cit

y ha s no t remove dsewag e solid s fro mit s lagoo n syste mfo r man y years . Schedule-B , L b an d Not e 5 requir e th e Cit

y t o recor dan

y actio n tha t

result s i n movemen t

withi n th e treatmen t

facilit y o f sewag e solids , and/o r

remova l o f

sewag e solid s fromth e treatmen t facility . Unde r

thi s renewal permit , sewag e solid s ma y b e transporte d off-site b y alicense d haule r fo r further treatmen t

an d disposa l a t

apermitte dfacility . Shoul dth e Cit y decid e t o produc e it s ow n biosolid s for disposal , i t mus t develo p aDepartmen t

approvabl e BMP . A draf t BM P mus t

receiv e aPubli c Notic e prio r t o it s implementation . DE Q require s aseparat e BM P Publi c Notic e proces s whe n th e draf t BM P i s no t give n Notic e i n conjunctio n with th e renewa l permit . Potentia l biosolid s applicatio n site s i n Clatso p Count

y ar e evaluate dfirst. Biosolid s site s locate d outsid e o f Clatso p Count

y mus t receiv e aPubli c Notic e that involve s resident s i n th e affecte d counties . Al l biosolid s applicatio n site s mus t mee t th e sit e selectio n criteri ase t fort h i n Orego n Administrativ e Rul e (OAR ) 340

- 050-0070 . Schedule-D , Ite mNo . 6 require s astud y o f th e existin g treatmen t

facilit y for improvemen t

o f BOD 5 an dTS S monthl y remova l efficiencie s durin g winte r season . Part

o f thi s stud y mus t

deal with Pon d# 1 sewag e solid s storage/removal . Additionally , Pon d # 1 mus t b e evaluate d a s a septag e receivin g an dtreatmen t pon dconnecte d t o th e lagoo n treatmen t system . Th e result s o f this stud y wil l enabl e DE Q an dth e permitte e t o determin e th e bes t wa y t o handl e sewag e solid s i n th e future . Inflo w an d Infiltratio n (I&I ) Th e Cit y o f Astori aha s avei y ol dsanitar y collectio n syste mmad e u p i n larg e part o f combine d sanitar y an dstor msewer system s (Attachment-1) . Pas t practic e ha s create d alegac y o f leakin g old , combine dsewer s subjec t to overflo w durin g mos t rai n events . Mor e recen t constructio n ha s focuse do n sewer

separation . Rainfal l drive n flow s i n th e combine d sanitar

y an d stor mcollectio n systemtypically excee dth e syste mcapacit y wit h overflow s possibl e a

t th e CS O point s show n o n Page s 1 an d2 o f

thi s draf t permit . Ther e are 3 8 CS O location s wit h 3 CS O outfall s liste d a s removed . CS O discharge s g o eithe r t o Young' s River

o r to th e Columbi aRive r

withou t treatment . Th e cit y i s require dunde r

Astoria' s amende d stipulatio n an d final orde r (ASFO ) WQMW-NWR

92-24 7 t o continu e separatin g it s sanitar y sewer s fro

mstor mwate r flows. Considerabl eCit

y o f Astori aEvaluatio n Repor t Pag e 7 o f 2 4 constructio n ha s already occurre dt o remov e stor mwate r fro mth e sanitai y system . Unde r th e ASFO , th e Cit

y ha s committe dt o alon g termconstructio n programtha t wil l reduc e th e numbe r

o f CS O point s an dth e quantit y o f flow release d a

t eac h CS O location . Th e Cit y ha s determine d that

i t wil l cos t approximatel y $3 9 millio n i n 201 0 dollar s t o construc t th e facilitie s neede d t o mee t th e leve l o f contro l require db y th e ASFO . CS O discharg e point s o n Young' s Ba y an d i n th e embaymen t

are aadjacent

t o th e Alderbroo k

residential neighborhoo d are require d t o achiev e aleve l o f contro l subjec t

t o a5-yea

r return winter

stor mevent an d a10-yea

r retur n summer storm . Al l other CS O discharge s point s t o th e Columbi aRiver shippin g channe l are require d t o achiev e a2

- yea r return summer

stor man do n averag e asix-in-a-winte r stor mleve l o f

control . Th e propose d leve l o f CS O contro l shoul dreduc e th e curren t volum e o f

CS O discharge s b y approximatel y 96 % i n atypical rainfal l year . Pretreatmen t Base do n Astoria' s populatio n an dlac k o f significan t

industria l sources , apretreatmen t progra m i s no t neede da

t this tim e t o protec t

influen t quality . Unde r

th e curren t

permi t (Schedule-C , Conditio n No . 3 ) a

n Industria l Wast e Surve y wa s completed . Th e surve y determine d that ther e ar e n o industria l sources . A pretreatmen t progra mi s no t

require d a

t thi s time . Pollutant s Discharge d Curren t Permit . Th e current

permi t allow s th e Cit

y o f Astori at o discharg e treate d effluen t fromit s wastewate r

treatmen t

facilit y a t Outfal l 03 9 year-around . Th e current permi t set s limit s o n th e followin g pollutants : Five-da y biochemical oxyge n deman d (BOD5 ) an d tota l suspende d solid s (TSS) ; E. coli bacteri a(dail y maximu man d monthl y average) ; chlorin e residual (dail y maximu m an dmonthl y average) ; p H (maximu man d minimum) ; ammoni a(dail y maximu man d monthl y average) ; effluen

t temperatur e (7-da

y mea n maximum) , dail y maximu mhea t load , averag e monthl y heat load ; an dpollutan t

removal efficienc y fo

r BOD 5 an d TSS . Proposed Permit . Th e propose dpermi t regulate s mos t

o f th e sam e pollutant s with th e followin g exceptions/changes : 1 . Th e percentag e remova l efficiencies 1 for summer seaso n BOD 5 an d TS S increas e from35 % t o 65 % t o compl y wit

h minimu m"equivalen t

t o secondai y treatment " standards ; 2 . Winte r

mas s load s fo r

BOD 5 an dTS S are increase d base d o n th e Department' s approval o f th e desig n averag e we t

weathe r flow (AWWF ) fo

r thi s facility ; 3 . Chlorin e residua l limits 2 (maximu mdail y an d averag e monthly ) ar e mor e stringent ; 4 . E. coli bacteri alimit s ar e replace d with feca l colifor man d enterococcu s bacteri alimit s (curren t permit' s E. coli limit s becom e propose d interi mlimits) ; an d 5 . Ammoni alimit s ar e eliminate dfro mth e permit , however , monitorin g requirement s ar e retaine di n Schedule-B . Footnotes : Percentag e Removal . A revie w o f pas t Astori apermit s found that th e NPDE S permi t

issue d o n Januar y 13 , 199 3 (expire dJun e 30 , 1997 ) containe d n o percentag e removal limit s fo r BOD 5 an dTSS . Th e lac k

o f removal limit s wa s apparentl y th e resul t o f pervasiv e CS O overflow s throughou t

th e combine dsanitai y syste mtha t coul d no t b e readil y quantize d fo

r flo w volum e o rCit

y o f Astori aEvaluatio n Repor t Pag e 8 o f 2 4 concentration . Th e renewal permi t issue d o n Februar

y 15 , 200 2 (expire d o n Januar y 31 , 2007 ) include dyear-aroun d35 % removal limit s for BOD 5 an d TSS . Th e 35 % removal limit s fo r summer seaso n ar e inadequate (se e permi t Schedule-A , Not e 4 for

adetaile d explanation) . Th e propose dsumme r

season , percentag e removal limit s i n Schedule- A ar e more stringent . Limit s ar e increase dt o 65 % t o achiev e th e "equivalen t t o secondai y treatment " leve l for thi s typ e o f treatmen t facility . Recen t

Discharg e Monitorin g Repor t (DMR ) dat aindicate s tha t thes e limit s ca n b e me t b y th e existin g treatmen t

facilit y (Attachment-3) . Winte r seaso n remova l efficiencie s are discusse d belo w unde r Permi t Discussion , BOD 5 an d TS S Removal Efficienc y (Winter Season) . C I Limits . Effluen

t chlorin e residua l fo

r fres h an d sal t

water wa s modele d usin g DEQ' s RP A spreadshee t

fo r chlorin e an dammoni atoxicit y (Attachment^) . Chlorin e permi t limit s (Attachment-5 ) wer e establishe dbase d o n discharg e monitorin g repor t (DMR) dat a (Attachment-2) , an do n worst-cas e availabl e dilutio n i n th e mixin g zone . Schedule- C i n th e propose dpermi t establishe s a2. 5 yea

r proces s leadin g t o th e additio n o f dechlorinatio n a

t Astoria' s wastewate r

treatmen t facility . Withi n 2. 5 year s o f permi t issuance , permitte e mus t

complet e aremode l o f

th e existin g chlorin e contac t basi n t o contro l an

d reduc e chlorin e residual i n th e facility' s effluent . Interi mpermi t limit s fo r chlorin e residual apply , unti l constructio n liste dunde r

Schedule- C i s completed . Whe n dechlorinatio n i s adde d t o thi s facility , final permi t

limit s wil l becom e effective . Bacteri aLimits . Fecal colifor man d enterococc i bacteri alimit s are propose d i n Schedule-A , L a(3 ) fo r th e protectio n o f

marin e water s an d estuarin e shellfis h growin g waters , per OA R 340-041-000 9 (1 ) (b) . Astori adischarge s t o th e Columbi aRive r Estuar y a t river mil e 18.0 , wher e ther e i s apotentia l for shellfis h growin g and/o r

harvest . Currently , shellfis h growin g an d harvestin g are no t

practice di n th e vicinit

y o f Astoria' s outfall . Th e propose dpermi t

contain s interi mlimit s for E. coli bacteri aan d final limit s fo r feca l colifor man denterococc i bacteria . B y not e followin g Schedule-A , L a(3) , th e propose d permi t states : * Shoul dbacteri adat aindicat e tha t th e existin g chlorin e contac t chambe r ca n mee t final permi t limit s for feca l colifor man d enterococc i bacteri aprior t o completio n o f

Schedule

C construction ; DE Q wil l requir e immediat e implementatio n o f th e final bacteri alimits . Enterococcu s standard s appl y t o all discharge s downstreamo f th e wester

n edg e o f Puget Islan d a t approximatel y R M 39.0 ; give n rule-base d definition s o f estuar y an d recreational water s develope db y th e Divisio n o f State Land s (DSL ) an d th e Departmen t o f Lan d Conservatio n an d Developmen t

(DLCD) . Astori adischarge s t o mixe d sal t an d fres h water

wit h a n approximate annua l averag e salinity o f 1 0 part s pe r

thousan d (ppt) ; i.e . estuarin e waters . Thes e condition s mandat e enterococcu s bacteri alimit s fo r th e propose d permit . Schedule-A , Not e 1 0 discusse s thes e limits .Cit

y o f Astori aEvaluatio n Repor t Pag e 9 o f 2 4 Whe n permi t

limit s for

feca l colifor man d enterococc i bacteri abecom e permanent , __ . coli testin g i s n o longer

require d(Schedule-B , L b Not e 4) . Schedule-A , Note s 9 an d 1 0 lis t specific s relatin g t o feca

l colifor man d enterococc i bacteri alimits . Limit s are take n fro m DEQ' s internal managemen t documen t

(IMD ) for

Bacteri aCriteri afo

r Marin e an d Estuarin e Water s (December

30,2010) , Table-1 . Ammoni aLimits . Ammoni alimit s are liste d i n th e curren t permit . Th e Departmen t

propose s t o eliminat e ammoni alimit s becaus e recen t reasonabl e potentia l analyse s (RPAs ) indicat e n o potential fo

r ammoni atoxicity . Th e Department' s RP A spread sheet s fo r ammoni atoxicit

y ar e containe di n Attachment-4 . Ammoni aDM Rdat aar e include d i n Attachment-2 . N o reasonabl e potential fo

r acut e or chroni c ammoni atoxicit

y i s indicate d unde r

worst-cas e conditions . Attachment- 6 contain s a

n Antidegradatio n Revie w Sheet , an d adiscussio n prepare d b y th e Cit y o f Astori arelatin g t o th e propose dreductio n i n ammoni alimits . Normally , renewal permi t limit s canno t

b e les s stringen t

than current

permi t limits . I n Astoria' s case , current ammoni a limit s are eligibl e fo

r areductio n becaus e the y are no t "fina l limits. " Th e ammoni alimit s liste d i n th e current

permi t (issue dFebruar

y 15 , 2002 ) never

too k effect becaus e mutual agreemen t an dorde r (MAO ) No . WQ/M-01-284 , Paragrap h 8.(b ) establishe d interi mlimit s tha t are stil l i n force . Th e MA O wa s signe do n th e sam e da y a s th e curren t

permi t wa s issued . Th e City' s argumen t

i n Attachment- 6 follow s th e outlin e i n EPA' s NPDE S Permi t Writer' s Manual (Exhibi t

7-2 , P . 7-5 , Septembe r

2010 ) fo r applicatio n o f

antibackslidin g requirements . Ammoni alimit s are base do n stat e standards . Water qualit y standard s fo

r ammoni aare attaine d pe r th e Clea n Wate r Ac t (CWA ) Section s 402(o)(l)/303(d)(4) . Th e Columbi aRive r ha s n o attaimnen t

problem s associate dwith ammoni aor dissolve d oxyge n pe r

303(d)(4)(B ) (effluen

t ammoni adoe s no t

caus e ameasurabl e reductio n i n dissolve d oxygen) . Th e propose d eliminatio n o f

ammoni alimit s i s consisten t wit h DEQ' s antidegradatio n policy . I t complie s with effluen

t guideline s an dwate r

qualit y standards , an d beneficia

l use s are no t

impaired . Beneficia l Us e Analysi s Th e designate dbeneficia l use s o f

th e mai n ste mColumbi aRive r are liste d i n Orego n Administrativ e Rul e (OAR) , Chapte r 340 , Divisio n 041 , Tabl e 101 A (Attachment-7) . Beneficial use s include : publi c an dprivat e domesti c water supply , industrial wate r supply , irrigation , livestoc k watering , fish & aquati c life , wildlif e an d hunting , fishing , boating , water contac t recreation , aestheti c quality , an dcommercial navigatio n an d transportation . Divisio n 041 , Tabl e 101 B lists , "Fis h Use s Mai n Ste mColumbi aRiver. " Fis h use s are , "salmo n an d steelhead migratio n corridor s a

t 2 0 °C. " Furthe r

clarificatio n offis h us e designation s i s provide d i n Figure s 230 A an d230B . Bot

h figure s sho w North Coas t Basin , a s wel l a s mainste muse s (Attachment-7) . Astoria' s outfal l discharge s t o th e mai n ste mColumbi aRive r with it s salmo n an d steelhea d migratio n corridor . Receivin g Strea mWate r Qualit y (WO ) Impact s Mixin g Zon e Analysi s I n September

200 8 th e Cit

y submitte dit s revise d mixin g zon e (MZ ) study . DE Q approve d th eCit

y o f Astori aEvaluatio n Repor t Page.l0of2 4 City' s study o n Decembe r 19 , 2008 . Th e M Z stud y focuse d o n worst-case , summer seaso n condition s i n th e Columbi aRiver ; i.e . th e 7-da y averag e low-flo w with areoccurrenc e interval o f 10-year s (7Q1 0 low-flow) . Base do n th e study , worst-cas e dilutio n a t 7Q1 0 low-flo w wa s determine dt o b e approximatel y H_i a t th e zon e o f

initial dilutio n (Z1D ) boundar y an d 36. 0 a

t th e M Z boundary . Th e Department' s wate r qualit y modeling , reasonabl e potential analyse s (RPAs ) fo r th e propose dpenni t

are base do n thes e dilutio n value s fo r worst-cas e conditions . Dilution s are liste d i n th e propose dpermi t i n Schedule-A , L a(1) ; a s aquic k referenc e for

futur e permi t evaluations . Thes e dilution s are use di n Schedule-D , Special Conditio n No . 3 , t o se t whol e effluen

t toxicit y (WET ) testin g parameters . Tota l Maximu m Dail y Load s (TMDLs ) fo r Mai n Ste m Columbi a Rive r Th e mai n ste mColumbi aRive r i s subjec t t o TMDL s fo

r dioxi n an d dissolve d ga s (OAR340-041

- 0103 , Attachment^) . Astoria' s discharg e i s no t affecte d b y eithe r

TMDL , sinc e i t

doe s no t contribute t o violation s o f

eithe r parameter . Temperatur e Analysi s T o protec t

th e beneficia

l use s o f salmo n an d steelhead migratio n (Attachment-7 , Tabl e 101B) , th e Columbi aRive r

i n th e vicinit

y o f th e outfal l mus t

no t excee d 2 0 °C , unde r

worst-case , low-flo w summer conditions . Accordin g t o DEQ' s 201 0 Integrate d Repor t Databas e (Attachment^) , th e Columbi aRiver

i s wate r qualit y limite d (WQL ) fo

r temperatur e year-aroun d fo r it s entire lengt

h i n Oregon. * *Th e temperatur e determinatio n relativ e to Astori aappear s t o b e over conservative ; i.e . for year-aroun ddischarg e t o a n estuar y a t R M 18.0 . DEQ' s current polic y i s t o lis t

th e entire rive r for temperatur e whe n violation s are discovere d a t on e or mor e location s fa

r upstream . DEQ' s Poin t

Sourc e Thermal Calculato r RP A spread sheet s (Attachment-10 ) indicate tha t ther e i s n o reasonabl e potential for a n effluen t drive n temperatur e violatio n a t th e M Z boundar

y o r fo r effluen t mixe dwit

h 25 % o f th e availabl e 7Q1 0 lo w flo w durin g summer season . RPA s indicat e tha t Astoria' s discharg e doe s no t contribute measurabl y t o rive r warming . Adequat e dilutio n i s availabl e i n th e M Z an driver t o kee p effluen

t temperature effect s withi n require d limit s unde r worst-cas e summer

seaso n conditions . Temperature limit s i n th e current permi t ar e propose d fo

r th e renewal permit . Temperature limit s canno t b e eliminate do n th e basi s o f th e abov e negativ e temperatur e RP A findings. Th e antidegradatio n argument s use dt o justif y th e eliminatio n o f

ammoni alimit s (Attachment-6 ) are no t applicabl e to temperature becaus e th e receivin g water s are WQ L for temperatur e (Attachment^) . Th e CW A Sectio n 303(d)(4)(A ) doe s no t allo w alimi t

reductio n fo

r non-attainmen t

waters , unles s thos e limit s are base do n atota l maximu mdail y load (TMDL ) or WLA . Astoria' s existin g temperatur e limit s are no t

base do n aTMD L o r

WLA ; therefore arevisio n i s no t allowed . A s state d above , th e Departmen t

propose s t o us e curren t

temperatur e limit s i

n th e renewal permit . Thermal Plume Requirements Orego n Administrativ e Rul e (OAR ) Chapter 340 , Divisio n 04 1 list s temperature contro l requirement s for

effluen t discharge s t o water s o f

th e State . Th e propose d Astori arenewal permi tCit

y o f Astori aEvaluatio n Repor t Pag e 1 1 o f

2 4 mus t compl y wit

h th e followin g "Thermal Plume " languag e i n OA R340-041-0053 . (2 ) (d ) Temperatur e Thermal Plum e Limitations . Temperatur e mixin g zone s an d effluent limit s authorize dunde r

340-041-002 8 (12 ) (b ) wil l b e establishe d t o preven t o r minimiz e th e followin g advers e effect s t o salmonid s inside the mixing zone: (A ) Impairmen t

o f a n Activ e Salmoni dSpawnin g Area . This is not a possibility for

Astoria's discharge, since there are no spawning beds in the vicinity of Outfall 039. (B ) Acut e Impairmen t

o r Instantaneou s Lethality . Acut e impairmen t o r instantaneou s lethalit y i s prevente dor

minimize db y limitin g potentia l fish exposur e t o temperature s o f 32. 0 degree s Celsiu s (89. 6 degree s Fahrenheit ) o r mor e t o les s tha n 2 seconds , Astoria's discharge temperature never

approaches this temperature threshold. (C ) Therma l Shock . Thermal shoc k cause d b y asudde n increas e i n wate r temperatur e i s prevente dor

minimize db y limitin g potential fish exposur e t o temperature s o f 25. 0 degree s Celsiu s (77. 0 degree s Fahrenheit ) o r mor e t o les s than 5 percen t o f th e cros s sectio n o f

100 percen t o f th e 7Q1 0 lo w flo w o f

th e wate r body . Astoria's discharge has not reached 25.0°C based on DMR data (Attachment-2). MZ dilation provides immediate temperature reduction even under

worst-case, low-flow conditions. (D ) Migratio n Blockage . Unles s th e ambien t temperatur e i s 21. 0 degree s o r greater , migratio n blockag e i s prevente do r

minimize db y limitin g potentia l fish exposur e t o temperature s o f 21. 0 degree s Celsiu s (69. 8 degree s Fahrenheit ) o r mor e t o les s than 2 5 percen t o f th e cros s sectio n o f 10 0 percen t

o f th e 7Q1 0 low-flo w o f

th e wate r body . Astoria's effluent

does not violate this criterion based on the Thermal

Calculator

runs discussed above. The Columbia River at Outfall 039is approximately 5 miles wide. Influen t an deffluent

temperatur e dat afo r

this treatmen t

facility (beginnin g i n January 2006 ) ar e containe di n Attachment-2 . Bacteri a Bacteri acontro l criteri afo r Astoria' s sewag e treatmen t facilit y are base d o n DEQ' s IMD , "Bacteri a Criteri afor

Marin e an dEstuarin e Waters. " Thi s IM D wa s issue d o n Decembe r 30,2010 . Th e IM D require s tha

t both feca

l colifor man denterococcu s bacteri alimit s b e liste d i n Schedule- A o f th e permit . Th e followin g limit s are propose dfo r feca l colifor mbacteria : Fecal Colifor

mBacteria . Shal l no t

excee d amedia n concentratio n o f 1 4 organism s per 10 0 mL , an dno t

mor e than 10 % o f

th e sample s shal l excee d 4 3 organism s pe r 10 0 mL (Schedule-A , L a(3)) . Schedule-A , Not e 9 , Fecal ColiformBacteri astates :Cit

y o f Astori aEvaluatio n Repor t Pag e 1 2 o f

24 Limit s ar e measure da

t th e end-of-pipe . Thes e fecal colifor mlimit s ar e take n fro m Sectio n 10.0 , Table- 1 o f DEQ' s IM D for

Bacteri aCriteri afor

Marin e an d Estuarin e Water s (Decembe r

30 , 2010 ) pe r

"Suggeste d Criteri aLanguag e fo r Permit. " I t

i s propose dtha t

additiona l monthl y sample s may b e take n ove r th e numbe r

specifie d i n Schedule-B , 1 . b o f

this permit . Al l sample s collecte ddurin g th e month mus t compl y i n aggregate t o th e limit s specifie di n Schedule-A , 1 . a(3) . Th e followin g limit s ar e propose dfor enterococc i bacteria : Enterococc i Bacteria . Shal l no t excee d ageometri c mea n concentratio n o f 3 5 organism s pe r 10 0 m L (Schedule-A , L a(3)) . Schedule-A , Not e 10 , Enterococc i Bacteri astates : Limit s are measure da

t th e end-of-pipe . I f

asingl e sampl e exceed s aconcentratio n o f 3 5 organism s pe r

10 0 mL , the n five consecutiv e re-sample s ma y b e take n a

t fou r hou r interval s beginnin g withi n 2 8 hour s afte r th e original sampl e wa s taken . I f th e lo g mea n o f th e fiv e re-sample s i s les s than o r equa l t o 3 5 organism s pe r 10 0 mL . aviolatio n shal l no t b e triggered . Thi s enterococc i limi t i s take n fro mSectio n 10.0 , Table- 1 o f DEQ' s IM D for Bacteri aCriteri afor

Marin e an d Estuarin e Water s (Decembe r 30 , 2010 ) pe r "Suggeste dCriteri aLanguag e for Permit. " Bacteri alimit s i n th e propose dpermi t are base d o n th e abov e feca l colifor man d enterococc i bacteri astandards . E. coli bacteri alimit s fro mth e curren t permi t are retaine d a s interim limits, unti l Schedule- C constructio n i s completed . Schedule-B , Lb , Note- 4 require s monitorin g for E. coli, .feca l coliform , an denterococc i bacteri aa t permi t issuance . A s discusse d above , anot e a t th e botto mo f

Schedule-A , La . (3 ) provide s fo r th e adoptio n o f

final bacteri alimit s upo n demonstratio n tha t

th e existin g chlorin e contac t basi n ca n mee t final permi t

limits . Ultimately , propose dfinal bacteri alimit s mus t b e me t whe n Schedule- C wor

k i s finished. Chlorin e Toxicity Astoria' s wastewate r

treatmen t

facilit y use s chlorin e t o disinfec t it s effluent

an d mee t

bacteria l limit s liste di n Schedule- A o f th e propose d renewa l permi t (se e above) . Currently , discharge d effluent i s not dechlorinated

t o remov e unacceptabl e toxicity , Interi man d final chlorin e residua l concentratio n limit s ar e liste di n Schedule-A , L a(3 ) o f th e renewa l pennit . Interi mchlorin e limit s apply , unti l Schedule- C wor k i s complete . Chlorin e toxicity wa s evaluate dusin g th e Department' s RP A sprea d shee t (Attachment-4) . Effluent DM Rdat afor

chlorin e residua l i s summarize d i n Attachment- 2 fo r th e interva l January 200 7 throug h Ma

y 2011 . Th e chlorin e RP A determine d tha t chlorin e i s present , year-aroun d a t toxi c level s i n effluent

discharge dfro mAstoria' s wastewate r treatmen t

facility . Chlorin e residua l limit s necessary t o contro l toxicity ar e liste d i n Attachment^ . Th e mos t stringen t limit s (sal t water , summe r

season ) ar e propose d a s year-aroun d chlorin e residua l limits . Propose d limit s fo r dail y maximu man dmonthl y averag e chlorin e residua l ar e liste d i n Schedule-A , 1 , a(3 ) o f th e propose dpermit ; an dcurren t chlorin e limit s ar e liste d a s propose d interi mlimits . Th eCit

y o f Astori aEvaluatio n Repor t Pag e 1 3 o f

24 propose dlimit s ar e mor e stringen t than th e interi m(current ) chlorin e limits . DE Q believe s tha t propose dchlorin e limit s can b e me t a t this treatmen t

facilit y onc e dechlorinatio n equipmen t i s installe dpe r

Schedule-C , Ammoni a Toxicit y Effluent ammoni adat aar e liste di n Attachment- 2 for th e year s January 200 7 throug h Ma y 2011 . A s discusse dabove , th e RP A for ammoni a(Attachment-4 ) determine d that effluent discharge s a

t Astoria' s treatmen t

facility d o no t

caus e ammoni atoxicit y (acut e an d chronic) ; respectivel y i n th e ZI D o r MZ . Base do n th e ammoni aRPA , th e Departmen t propose s t o eliminat e ammoni alimit s fro mth e propose dpermit . Th e eliminatio n o f

effluent ammoni alimit s i s consisten t with th e antibacksliding/antidegradatio n discussio n presente dabov e unde r "Pollutant s Discharged, " Footnot e #4 . Th e complet e antidegradatio n discussion/revie w i s presente d i n Attachment-6 . Continue dyear-aroun dammoni amonitorin g pe r Schedule-B , L b i s propose d t o trac k treatmen t facilit y performanc e i n removin g ammonia , an d t o provid e adat abas e fo r th e nex t permi t renewa l cycle . Dissolve d Oxyge n Reductio n Th e Department' s Streeter-Phelp s Dissolve d Oxyge n Mode l sprea d shee t wa s use d t o investigat e dissolve doxyge n (DO ) level s associate d with asumme r seaso n discharg e unde r worst-cas e condition s (Attachnient-11) . Sourc e an d rive r temperatur e dat awer e take n fromAttachments- 2 & -12 . Modelin g result s indicat e tha t th e D O dro p i n th e receivin g streami s < 0.00 5 mg/ L (insignificant ) after

complet e mixin g with th e effluent discharge . Mode l result s ar e consisten t with th e allowe dD O reductio n for this typ e o f

poin t sourc e discharge . Groundwate r Appropriat e section s o f

th e Groundwater

Prioritizatio n Workshee t

ar e include d i n th e Department' s files for thi s facility . Th e Permittee' s wastewate r treatmen t

an d disposal syste minclude s impoundment s for

sewag e solids . N o biosolid s are produce d a s discusse d above . At thi s facility , sewag e solid s ar e store di n line dtreatmen t lagoon s that

preven t leachin g o f

nutrient s t o groundwater . Thi s facilit

y pose s n o ris k

t o groundwater . Th e propose d permi t (Schedule-A , 1 . d ) require s prope r

facilit y operatio n an dmaintenanc e to protec t groundwater . Schedule-D , Special Conditio n No . 2 reiterate s tha t groundwater

mus t b e protected . E H DEQ' s p H Sprea dShee t (Attachment-13 ) evaluate s Astoria' s effluent for p H compliance . Columbi aRive r

dat acollecte da

t th e Beave r

Army Termina l (RM 55 ) i s use d t o mode l ambien t condition s (Attachment-12) , Effluent dat ai s liste di n Attachment-2 . Base d o n worst-case , summe r low-flo w conditions , th e Departmen t foun d n o reaso n t o chang e curren t p H permi t limits . Th e Departmen t

propose s t o us e curren t

p H limit s i n th e renewa l permi t [Schedule-A , 1 . a (3)] . A s part o f th e Schedule- C wor

k liste d i n this permit , th e cit y propose s t o ad d p HCit

y o f Astori aEvaluatio n Repor t Pag e 1 4 o f

24 adjustment/monitorin g equipmen t t o it s treatmen t

facility . p H adjustmen t

i s sometime s neede d i n lat e summe r

seaso n whe n effluent

drop s belo w th e permitte d dail y p H range . Toxic s Analysi s Attachment- 1 4 contain s RP A sprea dsheet s fo r metal s toxicity pertainin g t o Astoria' s effluent . A n • effluent , metal s dat asummary ; an dambient metal s dat afo

r th e Columbi aRive r

[Beave r Arm y Terminal (R

M 55) ] i s als o attached . Th e spread sheet for fres h wate r

toxicity indicate s that

al l metal s evaluate dhav e n o potentia l fo r acut e or chroni c toxicit

y unde r worst-case , summer

7Q1 0 low-flo w discharg e conditions . Whe n th e RPA i s ru n with th e same metal s dat aan d adischarg e t o sal t water , copper

i s flagge dwith areasonabl e potential for acute toxicity . On e copper sampl e use d i n this analysi s (17. 1 ug/L ) i s 3 6 % greate r tha n th e nex t

larges t coppe r datum . I f

thi s valu e i s excluded , there i s n o reasonabl e potential fo r acut e copper

toxicit y (sal t o r fres h water) . Th e propose dpermi t

(Schedule-B ) require s continue d metal s monitorin g durin g th e permi t term . Metal s dat awil l b e collecte dfo r influent , effluent , an d th e Columbi aRive r (nea r Astoria' s discharge) . Th e collectio n o f metal s dat amus t

compl y with th e criteri aan d quantitatio n limit s specifie di n Schedule-B , Not e 3 . Following two year s of

metal s testin g (counted fro mpermi t issuance) ; th e Departmen

t will re-evaluat

e metal s dat ab y reasonable potentia

l analysi s (RPA) . DE

Q will determin

e a t tha t tim e whethe r th e permi t shouldb e re-opene dan dpermi t limit s added (Schedule-B , l.e) . Give n additional metal s data , i t wil l b e possibl e t o improv e th e RP A fo r metal s toxicit

y a t th e nex t permi t renewal . A s i t

no w stands , ther e i s n o significant likelihoo d tha

t an y metal evaluate d exert s acut e o r chroni c toxicity unde r

worst-case , low-flo w condition s establishe d fo r Astoria' s discharge . PERMI T HISTOR

Y .. . Anti-degradatio n Revie w A n Anti-degradatio n Revie w wa s complete d with arecommendatio n t o procee d with this permi t action . A cop y o f

th e revie w shee t

i s locate d i n Attachment-6 . Complianc e Histor y Sinc e th e las t

permi t renewal , n o treatmen t

facilit y improvement s wer e made . Th e sanitai y collectio n system , however , wa s improve d t o reduc e th e numbe r an d volum e o f

CS O discharges . Emergenc y power

wa s installe da

t major pum p an d lif t stations . Overflo w weir s i n th e collectio n syste mwer e raise dt o retai n mor e sewag e durin g surcharg e events . Inlin e storag e facilitie s wer e constructe dt o capture sewag e that previousl y wen t

t o CS O outfalls . Considerabl e stor mwate r (inflo w an dinfiltration ) wa s remove dfro mth e sanitai y collectio n syste mwith recen t construction . Th e Department

signe da n amende dan d stipulate d orde r (ASFO ) wit

h th e Cit y o n October

29 , 201 0 fo r continue dsanitar

y sewer improvement s (Attachment-15) . Th e Cit y mus t eliminat e b y Decembe r 1 , 202 2 untreate dCS O discharges , subjec t to th e stor

mfrequencie s specifie d i n Paragrap h 1 1 . ao f

th e ASF O a

t al l remainin g CS O discharg e points , consisten t wit h th e facilitie s plan approve db

y th e Department .Cit

y o f Astori aEvaluatio n Repor t Pag e 1 5 o f

24 Sinc e th e current

permi t wa s issue d(Februar

y 15 , 2002) , th e facilit

y ha s experience d permi t violation s an

denforcemen t

action s a s follow s (se e Attachment-1 6 fo r acomplete listing) : DAT E 13Sep200 2 4Jun200 4 28Sep200 4 28Jun200 5 3May200 7 29Jan200 8 9Oct200 8 30Jul200 8 10Nov201 0 ACTIO N

Penalty Deman dNotic e (PDN ) WQM

NWR-02-15 0 PD N WQM-NWR-04-10 1 PDNWQM-NWR-04-11 7 PD N WQM-NWR-05-00 9 PD N WQM-NWR-07-00 3 PD N WQM-NWR-07-20 6 . PD N WQM-NWR-08-14 8 PD N WQM-NWR-08-18 7 Warnin g lette r

(WL-WQ-NWR-10

- 0101 ) LIMI T VIOLATION S $25 0 civi l penalt

y for failure t o submi t atemperature management plan . $300 0 civi l penalty fo

r failure t o complete Phase- 1 CS O overflo w contro l projects . $170 0 civi l penalt

y fo r failure t o instal l operational CS O monitorin g equipment . $21,30 0 civi l penalty for

unsanctione d CS O discharges . $600 0 civi l penalt

y for unsanctione d CS O discharge s t o Young s Bay . $375 0 civi l penalt

y for numerou s DM R effluen t limi t violations . $10 0 civi l penalt

y for failure t o mee t interi mchlorin e residua l limi t o n 18Aug2008 . $20 0 civi l penalt

y for chlorin e limi t violations . WL fo r October weekl y BO D effluen

t concentratio n violation . PERMI T DISCUSSIO N Fac e Pag e Th e Permitte e i s authorize dt o construct , install , modify , o r operate awastewate r

collection , treatment , control , an ddisposal system . Permit s year-aroun d discharg e o f treate d effluen

t t o th e Columbi aRiver

a t Outfal l 03 9 locate da

t RM 18.0 . Permi t

list s combine d sewer

overflo w (CSO ) point s locate di n th e City' s collectio n syste m(se e Attachment-1 7 fo r CSO s 001-03 8 locations) . Discharge s fro

mth e City' s wastewater

treatmen t facilit y mus t b e withi n limit s se t

b y Schedule-A , an dsubsequen t

permi t schedules . Al l other

discharge s ar

e prohibited . Schedule-A . Wast e Discharg e limitation s Treate dEffluen

t Discharge da

t Outfall 03 9 Th e propose dpermi t

set s limit s o n effluent

discharge s fro mthi s facility . Limit s o n effluent discharge s to th e Columbi aRive r include : • 5-da y biochemica l oxyge n deman d (BOD5) , « Tota l suspende dsolid s (TSS) ,Cit

y o f Astori aEvaluatio n Report Pag e 1 6 o f

2 4 o E. coli bacteri a(interi mlimit) , • Fecal colifor

man denterococc i bacteri a(final limits) , • pH , © Chlorin e residua l (interi man dfinal), • BOD 5 an dTS S remova l efficienc y « Effluent

temperatur e 7-da

y maximum , • Maximu mdail y hea t

load , an d • Monthl y averag e hea t load . Discharg e Season s I t i s propose dthat

summe r an dwinte r

season s liste d i n Schedule- A correspon d t o th e timin g establishe di

n th e City' s ASF O for

combine d sewe r

overflo w contro l (Schedule-A , Not e 1) . BOD s an dTS S Concentratio n an dMas s Limits : Base do n mai n ste mColumbi aRive r minimu mdesig n criteri aliste d i n OA R340-041-010 4 (4) , wastewate r

treatmen t resultin g i n amonthl y averag e effluent concentratio n o f

2 0 mg/ L fo r BOD 5 an dTS S (o r

equivalen t

control ) mus t

b e provide d for

period s o f

lo w strea mflow (Attachment-8) . A minimu mo f

secondary treatmen t

(o r equivalen t

control ) i s require d for

hig h strea mflow. Sinc e Astori atreat s it s wastewate r with a3-cel l facultativ e lagoo n system , "equivalen t t o secondary treatment " standard s apply. ' Th e Departmen t propose s t o continu e usin g year-aroun d "equivalen t

t o secondary treatment " standard s for thi s facility . "Equivalen t t o secondaty treatment " fo

r this facilit

y i s define da s amonthl y averag e concentratio n limi t o f 3 0 mg/ L for BOD 5 an d5 0 mg/

L for TS S (Schedule-A , Not e 3) . Th e summer

seaso n mas s loadlimit s fo r BOD 5 an d TS S ar e base d o n th e facility' s desig n averag e di y weathe r

flo w (ADWF ) = 4. 2 MGD . an d th e monthl y averag e BOD 5 an d TS S concentratio n limit s liste dabove . Winte r seaso n mas s load s are base d o n th e desig n averag e we t weathe r flow (AWWF ) = 12. 6 MGD , an dth e monthl y averag e BOD 5 an d TS S concentratio n limits . Th e limit s fo

r treate de Paramete r BOD 5 TS S ffluen t a t Outfall 03 9 (Ma

y 2 2 - Averag e Effluent Concentration s Monthl y 3 0 mg/ L 5 0 mg/ L Weekl y 4 5 mg/ L 7 5 mg/ L October

14 ) are : Monthl y Averag e lb/day 110 0 180 0 Weekl y

Averag e lb/day 160 0 260 0 Dail y

Maximu m Lb s 210 0 350 0 Calculations : BOD . (a ) 4. 2 MGD x 8.3 4 #/ga l x 3 0 mg/

L = 1100 lbs/da

y monthl y average ; (b ) lbs/da

y monthl y averag e x 1.5 - 1600 lbs/da y weekl y average ; an d (c ) lbs/da

y monthl y averag e x 2. 0 = 210 0 lbs/day dail y maximum .Cit

y o f Astori aEvaluatio n Repor t Pag e 1 7 o f

24 TS S (a ) 4. 2 MGD x 8.3 4 #/gal x 5 0 mg/ L = 18001bs/da

v monthl y average ; (b ) lbs/da

y monthl y averag e x 1. 5 = 260 0 lbs/da y weekl y average ; an d (c ) lbs/da

y monthl y averag e x 2. 0 - 350 0 lbs/da y dail y maximum . Th e limit s fo

r treate deffluent

a t Outfall 03 9 (October

1 5 - May 21 ) are : Paramete r BOD 5 TS S Averag e Effluent

Concentration s Monthl y 3 0 mg/ L 5 0 mg/ L Weekl y 4 5 mg/ L 7 5 mg/ L Monthl y Averag e lb/da y 320 0 530 0 Weekl y

Averag e lb/day 470 0 790 0 Dail y

Maximu m Lb s 630 0 1050 0 Calculations : BOD 5 (a ) 12. 6 MG D x 8.3 4 #/ga l x 3 0 mg/ L = 320 0 lbs/da

y monthl y average ; (b ) lbs/da

y monthl y averag e x 1.5 = 470 0 lbs/da v weekl y average ; an d (c ) lbs/da

y monthl y averag e x 2. 0 = 630 0 lbs/da y dail y maximum . TS S (a ) (b ) (c ) 12. 6 MG D x 8.3 4 #/gal x 5 0 mg/ L = 530 0 lbs/dav monthl y average ; lbs/da y monthl y averag e x 1. 5 - 790 0 lbs/da v weekl y average ; an d lbs/da y monthl y averag e x 2. 0 = 10500 lbs/da y dail y maximum . Th e Cit y o f Astoria' s curren t

wastewate r

treatmen t

facilit y i s capabl e o f

meetin g th e abov e propose dmas s load limit s base do n composite sampling . BOD , an dTS S Remova l Efficienc y (Summer Season ) Fo r Astoria' s lagoo n treatmen t system , aminimu mmonthl y averag e percentag e removal = 65 % fo r BOD s an dTS S i s propose d(Schedule-A , Not e 4) . May 22-Octobe r

1 4 Paramete r BOD s Remova l Efficienc y TS S Remova l Efficienc y Limitation s BOD 5 remova l efficienc y shal l no t b e les s tha n 6 5 % monthl y average . TS S remova l efficienc y shal l no t b e les s tha n 6 5 % monthl y average . BOD , an dTS S Removal Efficienc y (Winter Season ) A 35 % monthl y averag e removal efficienc y i s propose d fo r BOD 5 an d TS S base d o n pas t practice , an dth e effect s o f

acombine dsewer

syste m(Schedule-A , Not e 5) . Attachment- 3 discusse s th e reason s for

maintainin g 35 % monthl y averag e removal efficiencie s for BOD 5 an d TSS :Cit

y o f Astori aEvaluatio n Repor t Pag e 1 8 o f

2 4 A removal efficienc y standardo f 85 % for BOD 5 an d TS S i s establishe d i n 4 0 CFRPar t 133.102 . Thi s i s "secondar y treatment " fo

r POTWs . Tricklin g filter s an d facultativ e lagoon s are allowe dlimit s considere d"equivalen t t o secondar

y treatment " throug h 4 0 CFRPar t 133.10 5 (thi s rul e allow s bot

h BOD 5 an dTS S removal efficienc y o f 65 % a s amonthl y average) . State s ma y furthe r adjus t remova l efficienc y (fo

r eithe r o r bot h BOD 5 an d TSS ) throug h on e o f tw o exceptio n processes . Th e exceptio n proces s fox facilities with combined

sewers i s found i n 4 0 CFRPar t 103(a) . Thes e limit s nee d t o b e establishe d o n acase-by-cas e basis . Astori afits i n thi s categoiy . B y rul e the y shoul donl y b e applie d durin g we t weather . Calculated

removal should be valid for the life of

the facility, and

only updated

if conditions change or

the facility is updated. Schedule-D , special conditio n No . 6 require s atreatmen t facilit y evaluatio n t o determin e whether

ther e i s potential for

improvin g percentag e removal s a t th e existin g treatmen t facility . Th e study i s require d withi n 6-month s o f permi t issuance . Base d o n th e facilit y evaluation , th e Departmen t wil l determin e whethe r

"change d conditions " warran t a n increas e i n percentag e removals . Propose dwinter

seaso n remova l efficiencie s (equa l t o current

% removals ) ar e a s follows : Octobe r 15-Ma v 2 1 Paramete r BOD 5 Remova l Efficienc y TS S Remova l Efficienc y Limitation s BOD 5 remova l efficienc y shal l no t b e les s tha n 3 5 % monthl y average . TS S remova l efficienc y shal l no t b e les s tha n 3 5 % monthl y average . p H Limits . Th e propose dpF I limit s i n Schedule- A ar e th e sam e a s thos e i n th e current

permit . Temperature Limits . Propose dtemperature limit s i n Schedule- A ar e th e sam e a s thos e i n th e curren t permit . Se e Schedule-A , Note s 1 3 an d 1 4 fo r detail s o n usin g thes e limits . Bacteri a Th e propose dpermi t

limit s discharge s o f

E. coli, feca

l coliform , an d enterococc i bacteri at o water s o f th e state . Interi mE. coli bacteri alimit s replace d wit h final fecal coliforman d enterococc i bacteri alimit s pe r Schedule- C completion . Shoul d bacteri atestin g indicat e that th e existin g chlorin e contac t

chambe r ca n achiev e final bacteri alimit s befor e Schedule- C wor

k i s finished ; final bacteri alimit s wil l b e applie d earl y (not e followin g Schedule-A , L a(3)) . Th e permi t

propose s th e followin g bacteri alimit s (Schedule-A , Note s 9 & 10) . Paramete r (Year-around ) E. coli Bacteria (Interim Limits) Fecal Colifor

mBacteri a Limitation s Shal l no t excee d 12 6 organism s pe

r 10 0 m L monthl y geometri c mean . N o singl e sample shall excee d40 6 organisms pe

r 10 0 ml . Shal l no t excee d amedia n concentration of 1 4 organism s pe

r 10 0 mL ; an d 10% of th e sample s shall no

t excee d 4 3 organism s pe

r 10 0 mL .Cit

y o f Astori aEvaluatio n Repor t Pag e 1 9 o f

2 4 Enterococc i Bacteri a Shal l no t excee d ageometri c mea n concentratio n o f

3 5 organism s pe r

10 0 mL . Interi m__ . coli bacteri alimit s remai n i n effect , unti l Schedule- C constructio n i s completed ; o r unt i DE Q determine s tha

t th e existin g chlorin e contac t basi n ca n mee t th e final limit s (whicheve r occur s first). Chlorin e Residual Year-aroun dchlorin e residua l interi man d final limit s (dail y maximu man d monthl y average ) are propose d(Schedule-A , L a(3)) . Interi mlimit s are take n from-the current permit . Fina l limit s wer e develope db y RP A usin g th e mos t stringent discharg e condition s (se e discussio n above) . Th e permitte e mus t

compl y with th e interi mchlorin e limits , unti l Schedule- C constructio n i s completed . Th e Schedule- C complianc e schedul e provide s fo r th e desig n an d reconstructio n o f th e chlorin e contac t

basi n for

enhance d effluent

disinfection ; an d add s dechlorinatio n an d p H monitoring/contro l equipmen t t o compl y with final chlorin e residua l an d p H limits . Schedule-A , Not e 1 1 discusse s chlorin e residua l complianc e testing . Paramete r (Year-around ) Chlorine Residual (Interim Permit Limits) Chlorin e Residua l Limitation s Th e end-of-pip e effluen

t limit s fo r chlorine are : daily maximu

mlimi t ~ 0. 3 mg/

L an d monthl y averag e limi

t = 0. 1 mg/ L (Not e 7) . Shal l not excee d 0.1 1 mg/

L dail y maximu m an d 0.0 4 mg/ L monthl y averag e (Note s 8 & 

## in . Ammoni a Th e Departmen t

propose s to eliminat e ammoni alimit s fro mth e renewal permi t base d o n recen t RPA s (Attachment) , an dcomplianc e with EPA s antibacksliding/antidegradatio n requirement s (Attachment-6) . Se e DEQ' s ammoni aantidegradatio n discussio n abov e unde r Pollutant s Discharge d(Footnote #4) . Mixin g Zon e an dZon e o f Immediate Dilutio n Mixin g Zone : Excep t

a s provide dfor

i n OA R340-045-0080 , n o waste s shal l b e discharge d an d n o activitie s shal l b e conducte dwhic h violat e Wate r Quality Standards , a s adopte d i n OA R340

- 041 ; excep t

i n th e followin g define dmixin g zone : Th e Regulator

y Mixin g Zon e (RMZ ) i s tha t portio n o f

th e Columbi aRive r

containe d withi n a radiu s extendin g tw o hundre d(200 ) feet fromth e outfal l discharg e point(s ) i n al l directions . Th e Zon e o f

Immediat e Dilutio n (ZID ) shal l b e define d a s tha t portio n o f

th e allowabl e mixin g zon e tha t i s withi n atwent

y (20 ) foot

radiu s o f eac h outfal l discharg e point . Th e Departmen t

believe s tha

t th e mixin g zone , a s describe d above , i s appropriate for thi s discharge . Beneficia l use s o f th e receivin g streamwil l b e protected , an d th e mixin g zon e meet s th e criteri ai n rule .Cit

y o f Astori aEvaluatio n Repor t Pag e 2 0 o f

2 4 CS O Outfall s 001-03 8 Permitte e mus t

compl y with th e performanc e standard s for it s 3 8 combine d sewer

overflo w (CSO ) outfall s (liste do n Page s 1 an d2 o f thi s permit) ; an d with th e schedul e for attainmen t

thereof , i n accordanc e with th e provision s o f th e amende d stipulatio n an d final order (ASFO ) WQMW-NWR

92-24 7 (Attachment-15 ) consisten t with th e contro l programse t fort h i n th e permittee' s CS O Facilitie s Plan . Th e CS O Facilitie s Pla n i s aLon g Ter mContro l Plan unde r

th e requirement s o f

th e Unite dState s EPA' s Combine dSewe r Overflo w Contro l Policy . Attachment-17

- show s CS O outfal l locations . I t i s propose dtha t

Schedule- A lis t

th e Nin e Minimu mControl s for operatio n an d maintenanc e o f th e combine dsewe r

system , a s se t

fort h i n EPA' s Combine d Sewe r Overflo w Contro l Policy . Th e Nin e Minimu mControl s ar e applicabl e t o this permit . Groundwater

Protectio n Th e renewa

l permi t propose s t o prohibi t

al l activitie s a

t this facilit

y tha t coul d caus e a

n advers e impac t o n th e existin g o r

potentia l beneficia

l use s o f groundwater . Schedul e B - Minimu m Monitorin g an d Reportin g Requirement s Th e renewal permi t

propose s tha

t th e laborator

y use d b y th e permitte e t o analyz e sample s hav e a qualit y assurance/qualit

y contro l (QA/QC ) programt o verif y th e accurac y o f

sampl e analysis . I f QA/Q C requirement s are no t me t fo r an y analysis , th e result s shal l b e include d i n th e report , bu t no t use di n calculation s require db y th e propose d permit . Whe n possible , th e permitte e shal l re-sampl e i n atimel y manne r

fo r parameter s failin g th e QA/Q C requirements , analyz e th e samples , an d repor t th e results . I n 1988 , th e Departmen t develope damonitorin g matri x fo r commonl y monitore d parameters . Propose dmonitorin g frequencie s for al l permi t

parameter s ar e base d o n this matrix . The y correspon dt o thos e applie dt o facilitie s o f simila r siz e an d complexit

y i n th e state . Propose d monitorin g frequencie s are unchange dfromth e curren t permit . Influent Samplin g Influen t parameter s mus t

b e monitore d a s specifie d i n th e permi t a t th e indicate d locations . Th e permi t propose s that

gra b samples , measurements , an d composit e sample s b e take n a t th e headwork s jus t

upstreamo f

th e Parshal l flume . Septag e deliverie s are sample d afte r screenin g a

t th e headworks . Al l measurement s fo r influent temperatur e (summe r

season ) an d sample s fo

r toxic s are take n i n th e same location . Influent Measuremen t

an dSampling : o Total flo w (dail y measurement , continuou s recorder) , ® Flo w meter

(annual calibration) , o BOD s an

d TS S concentratio n ( 1 day/week b y 24-hour , composit e sampler) , ® BOD 5 an dTS S concentratio n (monthl y averag e calculatio n fo r each) , * BOD 5 an

dTS S mas s loadcalculation s (weekl y an d monthl y average) , « p H ( 3 days/week

b y gra b sample) , an dCit

y o f Astori aEvaluatio n Repor t Pag e 2 1 o f

2 4

• Metal s samplin g b y composit e sampler (tak e 2 samples/yea

r for 5 year s wit

h on e sampl e durin g winte r an don e durin g summer) . Effluen t Samplin g fo

r Outfal l 03 9 A t permi t issuance , th e WWT P effluen t samplin g poin t

i s locate d a t

th e chlorin e contac t

basin' s discharg e weir . Followin g th e installatio n o f dechlorinatio n an d p H adjustment equipment

a t this treatmen t facility , th e effluent

samplin g poin t

wil l b e locate d immediatel y downstrea mo f th e dechlorinatio n an dp H adjustment zones . Th e permi t

propose s t o tak e effluen

t gra b an d composit e samples , an dmeasurement s a t th e same location . Sample s for effluen t toxic s an d temperatur e measurement s ar

e take n a t th e sam e location . Monitorin g for ambien t surfac e wate r

(Columbi a River ) mus t

b e locate dupstreaman doutsid e o f th e regulator

y MZ , pe r

Schedule-B , Note- 3 (las t paragraph) . Measuremen t

an dSamplin g o f

Year-Aroun d Effluen

t Parameters : • Tota l flo w (dail y measurement , continuou s recorder) ; • Flo w mete r

(annual calibration) ; • BOD 5 an dTS S concentratio n ( 1 day/week b y 24-hour , composit e sampler) ; • BOD 5 an dTS S concentratio n (monthl y averag e calculation) ; • BOD 5 an dTS S mas s loa dcalculation s (weekl y an d monthl y average) , • BOD 5 an

dTS S percen t

removal (monthl y averag e calculation) ; • p H ( 3 days/week

gra b sample) ; • E. coli bacteri a(on e gra b sample/week) ; • E. coli bacteri a(monthl y geometri c mean calculation) ; • Feca l colifor mbacteri a(on e gra

b sample/week) ; • Feca l colifor mbacteri a(monthl y median an d percen t exceedin g 4 3 organism s pe r 100 mL calculations) ; • Enterococc i bacteri a(on e gra b sample/week) ; • Enterococc i bacteri a(monthl y geometri c mean calculation) ; • Pound s Chlorin e use dfo r disinfectio n (measurement 5-days/week) ; • Chlorin e residual gra

b sampl e (5-days/week) ; • Chlorin e residual (monthl y averag e calculation) ; • Bisulfite residual concentratio n (5-days/week) ; • Ammoni aa s N ( 1 day/week a s 24-hou r

composit e sample) ; • Ammoni aa s N (monthl y averag e calculation) ; • Semi-annual metal s samplin g b y 24-hou r composit e metho d (on e summer an d on e winte r sampl e eac h yea

r fo r permi t term) ; • Sewag e solid s managemen t (recordo f

eac h relocatio n and/o r

transpor t event) ; an d Temperatur e Measurement s (May 2 2 - Octobe r 14) : » Influent

dail y maximu mtemperatur e (on e measuremen t durin g Augus t

eac h year) ; • Effluen

t dail y maximu mtemperatur e (on e measuremen t durin g Augus t

eac h year) ; an d • Columbi aRiver

dail y maximu mtemperatur e (on e measuremen t durin g Augus t

eac h year) .Cit

y o f Astori aEvaluatio n Repor t Pag e 2 2 o f

2 4 Ambient Metal s Testin g for

th e Columbi aRiver : Gra b sample s mus t

b e take n quarterl y for

th e first tw o year s followin g permi t issuance , an d semi

annual thereafte

r (on e winte r

an don e summer) . CS O Outfal l Monitorin g (Outfall s 001-038 1 Th e permitte e mus t

monito r eac h combine d sewe r

outfal l (CSO ) discharg e poin t identifie do n Page s 1 an d2 o f

th e propose dpermit . Permitte e mus t recor d th e followin g concernin g overflow s a t eac h CS O point , pe r

directio n o f

ASF O WQMW-NWR-92-24 7 (se e Schedule-B , Not e 6) :

• Dat e an dstart

tim e (recor do f

eac h occurrence) ; • Duratio n o f

CS O even t

(measurement) ; an d • Volum e o f

CS O even t

(calculated) . Discharg e Monitorin g Repor t (DMR ) Procedure s Thi s sectio n require s tha t

DMR s b e submitte d monthly , an d list s mandator y DM Rcontent . WE T Testin g Whol e effluen

t toxicity (WET ) testin g i s propose d with referenc e t o Schedule-D , Conditio n No . 3 fo r testin g frequenc y an dprocedures . Fiv e Da y Reportin g o f

SSO s I t i s propose dthat

sanitai y sewe r

overflow s (SSOs ) b e reporte d withi n 24-hour s with awritte n report t o follo w withi n 5-days , unles s waive d b y th e Department . Writte n report s are t o us e DEQ' s SS O Reportin g Form . Schedul e C - Permi tComplianc e Condition s Schedule- C propose s acomplianc e schedul e for treatmen t

facilit y upgrades . Th e complianc e schedul e applie s t o th e re-constructio n o f th e existin g chlorin e contac t basin , an d th e additio n o f dechlorinatio n an dp H control/monitorin g equipment . Thes e change s wil l ensur e that final Schedule- A limit s for

chlorin e residua l an d bacteri aar e met . Interim Schedule- A limit s for chlorin e residua l an dbacteri aare liste d t o bridg e th e constructio n interva l (2. 5 year s followin g permi t issuance ) leadin g t o th e require d facility improvements . Schedule-A , Note s 7 & 8 referenc e Schedule-C . B y Schedule-C , aprojec t statu s repor

t mus t b e submitte d eac h yea

r o n th e permi t

issuanc e anniversar y date . Th e permi t

ma y b e re-opene d an d modifie d t o b e consisten t with condition s o r mitigatio n measure s impose da s aresul t o f EPA' s Endangere d Specie s Ac t consultatio n with NMFS an dUSFW o n DEQ' s rul e authorizin g th e us e o f this complianc e schedule . Failur e t o mee t th e final chlorine residual, and

bacteria limits liste d i n Schedule- A b y th e dat e set i n Schedule- C i s aviolation of the NPDES

permit. Th e Permitte e i s require d t o mee t th e complianc e date s establishe di n Schedule-C . N o late r than 1 4 day s followin g eac h milestone , th e permitte e mus t

notif y DE Q i n writin g o f

it s complianc e or

noncomplianc e with th e interi m requirements . An y report s o f noncomplianc e mus t

includ e th e caus e o f

noncompliance , an y remedia l action s taken , an dth e probability o f meetin g th e nex t

schedule d requirements .

### Cit

y o f Astori aEvaluatio

n Repor t Page 2 3 o f 2 4 Th e Departmen

t feel s tha t the proposedschedul

e fo r th e abov e facilit y upgrade s i s as shor

t a s technicall y feasible . Th

e propose d permi t will probabl

y b e issue di n Octobe r 2011 . A facilit

y plan , pre-design report , an

d final plan s an

d specification s must

b e approve

dby th e Departmen

t prio r t o construction start . Financin g arrangements must

b e mad e b y the City . Winte

r seaso n constructio

n i s unlikely , sinc e hig

h influen t flows requir

e additiona

l treatmen t flexibility . Base

do n thes e constraints , the Departmen

t feel s tha t thes e proposedfacilit

y upgrade s ca

n b e complete

di n 2. 5 years . Th

e compliance schedul

e i s considere

db y the Departmen

t t o compl y wit h DEQ' s Compliance Schedul

e IM D fo r "as-soon-as-possible. " Schedule D - Specia

l Condition

s Schedule- D o

f the proposed permi

t include s si

x Specia l Conditions . 1 . Operato

r Certification . Th

e permitte e shall compl

y wit h Orego n Administrativ e Rule (OAR) , Chapte r 340 , Divisio n 049 , Regulation s Pertaining to Certification o f Wastewate

r Syste m Operato r Personnel . Th

e permitte e shall hav e it s wastewate r syste msupervisedb

y one o r mor e operator s wh

o ar e certified a

t aclassification an

dgrad e level specifiedin th e permit . The permittee' s wastewate

r syste mma y not b e withou t supervision fo

r mor e tha n thirt y (30) days : an d the permitte e i s responsibl e fo r ensuring th e wastewate

r syste mha s aproperl

y certified superviso

r availabl e a

t all time s t o respondon-site . 2 . Groundwater . The permittee i s no t require dto perfor

mahydro-geologi c characterizatio n o r groundwate

r monitoring during the ter

mo f thi s permit

providedthe facilitie s ar

e operated i

n accordanc e wit

h th e permi

t conditions ; an

dther e ar e no .advers e groundwate

r qualit y impact s (complaint s o

r othe r indirec t evidence ) resultin g fro

mth e facility' s operation ! 3 . Whole Effluen

t Toxicit y (WET ) Testing . Annual , fres

h wate r WE T testin g i s proposed during the permi

t term . DEQ' s la

b determinedtha

t WE T sal t wate r testin g i s not

required , sinc e th e effluen

t plum e spend s 6-second s o

r les s within abotto

mhugging sal

t wate r wedge befor e risin g t o the fres h wate r surface . Tw o test s mus t b e conductedin tw o differen t summe r seasons , an

d tw o test s mus t

b e conductedin tw o differen t winte r seasons . Afte

r the initia l fou r tests , th e permitte e mus t

conduct annua l WE T test s i n rotatin g winter/summe r seasons . Acut

e an d chroni c tes t

procedure s ar

e propose dwit

h tes t dilution s simulating th e actua l worst-cas e dilution s foun

d a t th e ZI D an dM Z boundaries . 4 . Emergency Respons e an d Publi c Notificatio n Plan . I t i s proposedtha

t permitte e develo

p an d maintain a n Emergency Respons e andPubli c Notificatio n Plan , pe r Schedule-F , Section-B , Condition s 7 an

d 8 . Th e Pla n mus t infor mcitizen s i

n atimel y manne r o f th e location , time , an d magnitud

e o f untreated sewage discharges . Permitte e mus t annuall y updat e th e Plan' s spill notification list . Permittee must educat e satellit e collection system s (thos e discharging to Astoria' s collectio n system ) concerning monitoring an dreporting requirement s fo r sanitar y sewe r overflow s (SSOs) . Mile s Crossing Sanitar y District i s on e suc h satellit e collectio n system .Cit

y o f Astori aEvaluatio n Repor t Pag e 2 4 o f

2 4 5 . Notification . Th e permitte e shal l notif y th e DE Q Northwes t

Regio n - Portlan d Offic e i n accordanc e with th e respons e time s note d i n th e Genera l Condition s o f thi s permit , o f

an y malfunctio n s o that

correctiv e actio n ca

n b e coordinate d betwee n th e permitte e an d th e Department . 6 . Facilit y Planning t

o Improve Winte

r Seaso n Percentag e Removal s fo

r BOD s an d TSS . Schedule-A , Not e 5 reference s thi s specia

l condition . Th

e permitte e i s require d t

o submi t withi n 6 month s o f permi t issuanc e a

n approvabl e facilit

y pla n tha t accesse s ho w sewag e solid s build-u p i n lagoo n Cel l # 1 impacts treatmen

t an dBOD 5 an

d TS S percentag e removals . Futur e CS O flow captur

e pe r continuing CS O remova

l wor k required b

y ASF O No . WQMW-NWR-92-24 7 mus t b e considered . Alternative s fo

r maximizing BOD5 an

d TS S percentag e removal s during winte r season unde

r differen t treatmen t scenario s mus t

be discussed . Th

e remova l o f th e sewag e solid s build-u

p fro m lagoo n Cel l # 1 mus t b e evaluated . Ammoni

aan d solid s transfer s amon

g lagoo n cell s mus t

b e addressed . Schedul e E - Pretreatmen t Progra m The proposed

permit does not require a pretreatment

program based

on documentation submitted during the current

permit cycle. Schedul e F - Genera l Condition s Th e General Condition s wer e revise dan d issue d o n Septembe r 18 , 2009 . A summary o f th e change s i s a s follows : (1 ) Ther e ar e additiona l citation s t o th e federa l Clea n Wate r

Ac t an d CFR , includin g reference s t o standard s for sewag e sludg e us e o r

disposal ; (2 ) Ther e i s additiona l languag e regardin g federal penalties ; (3 ) Bypas s languag e ha s bee n mad e consisten t with th e Cod e o f

Federa l Regulations ; an d (4 ) Overflo w languag e ha s bee n modified ; • Formerl y th e languag e state d that overflow s i n respons e t o th e five o r te n yea r even t woul dno t

violat e th e permit , • No w i t

state s tha t

overflow s ar e prohibited , an d • DE Q wil l continu e t o exercis e enforcemen t discretio n with respec t

t o overflow s consisten t with th e provision s o f

th e Bacteri aRul e (OA R340-041-0009) . Thes e General Condition s ar e standar daddition s t o NPDE S permit s o f this type . Thei r

inclusio n i s propose dfor

this draf t permit . GLS : Astori aNPDE S Fac t Shee t 16Sept2011.docx/Revised : 27Oct201 1