FAC T SHEE T An d NPDE S WASTEWATE RDISCHARG E PERMI T EVALUATIO N

Departmen

t o f Environmenta

l Qualit y Wester n Regio n - Sale

mOffice 75 0 Fron t Street NE , Suit e 120 , Salem , OR 97301-103 9 Telephone : (503 ) 378-824 0 PERMITTEE : Cit y o f Medfor d 41 1 Wes t Eight h Street Medford , Oregon 9750 1 Fil e Number : 5512 5 110 0 Kirtlan d Roa

d Ji mHill , Administrato r Telephon e Number : (541 ) 774-210 0 Mar k E.Hamli n Telephon e Number : 503-378-8240 , extensio n 23 9 Renewa l o f aNationa l Pollutant Discharg e Eliminatio n Syste m(NPDES ) wastewate

r discharg e permi t Majo r Domesti c Level I V Level I V Novembe r 29,199 6 99277 7 SOURC E LOCATION : SOURC E CONTACT : PERMI T WRITER : PROPOSE D ACTION : SOURC E CATEGORY : TREATMEN T SYSTE M CLASS : COLLECTIO N SYSTE M CLASS : PERMI T APPLICATIO N DATE : PERMI T APPLICATIO N NUMBER : 

### BACKGROUN D Introductio n Cit y o f Medfor d operate s awastewate

r treatment facilit y locate d i n Centra l Point , Oregon , Wastewate r i s treate d an

d discharge d to th e Rogu e Rive r i n accordanc e wit

h Nationa l Pollutant Discharg e Eliminatio n System(NPDES ) Permi t numbe r 100985 . Th e Permi t

fo r th e facilit y wa s issue d o

n Septembe r 30,199 2 an d expire d o

n Ma y 31,1997 . Th e Department

receive d arenewa

l applicatio n o n Novembe

r 29,1996 . A renewa

l permi t i s necessar

y 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 and th e Federa l Clea n Wate r Act . Th e Departmen

t propose s to renew th e permit . Facility Descriptio n Wastewate

r treatment facilitie s hav e existe d a

t thi s sit e sinc e th e federa

l government

operate d i t

fo r Cam p White . Th e Cit

y o f Medfor d obtaine d th e site in 1948 . Th e existin g treatmen t facilitie s wer

e initially constructe d i

n 1970 . Phase d expansion s hav e occurre d o n aregula r basi s sinc e 1980 . Sinc e 1999 , th e followin g project s hav e bee n completed :

• Constructio n o f

aheadwork s diversio n structure t o diver t sewag e flo w aroun d th e facilit y i n cas e o f extrem e flows i

n order t o avoi d damag e t o th e treatmen t facility . • Installatio n o f

tw o ne w ba

r screen s rate d a

t 6 0 mg d each .Cit

y o f Medford Evaluatio n Repor t Pag e 2

• Installatio n of

a n additional magneti c flow meter . • Constructio n o f

afifth secondar

y clarifier . • Complete d conversio n t o liqui d sodiumhypochlorite fo r disinfection . • Completio n o f

th e chlorin e contac t

tan k expansion . • Installatio n o f

a1000 k W emergenc y generator . • Installatio n o f

fiber opti c Etherne t

throughou t

th e facility . Al l 6 controller s hav e been switche d t o Alle n an d Bradle y PLCs . RSVie w operatin g softwar e ha s been installed , • Installatio n o f

th e ne w outfall an

d multipor t diffuse r • Constructio n of

th e tricklin g filter

snai l remova

l system • Renovatio n an

d linin g o f th e wes t sludg e drying bed s The major treatment proces s use d i s th e Tricklin g Filter/Activate d Sludge . Th e liqui d treatment portio n o f th e facilit y consist s o f

headworks , gri t

removal , primar

y treatment , tricklin g filter/activated sludg e secondar y treatmen t

(consistin g o f

tw o activate d sludg e aeratio n basins) , secondar y clarification , chlorin e disinfectio n and dechlorinatio n and th e outfall to th e Rogu e Rive r throug h amultipor

t diffuser . Th e solid s portio n o f

th e facilit y consist s o f

gravit y belt thickening , anaerobi c digestion , sludg e storag e and biosolid s drying . Th e liqui d facilitie s include tw o mechanicall y rake d screens , tw o aerate d gri t tanks , tw o rectangula

r primar y clarifiers , a14

0 foo t diamete r tricklin g filter, five 9 0 foo

t diamete r secondar y clarifiers , fou

r chlorin e contac t

basin s an d tw o outfall s (se e th e Outfall s sectio n fo r mor e detail) . Th e solid s facilitie s ar e discusse d unde

r th e Biosolid s Managemen t an d Utilizatio n section . Beside s servin g th e Cit

y o f Medford , th e facilit

y treat s wastewate

r fro mCentra l Point , Jacksonville , Talent , Phoenix , Eagl e Point , th e Whit e Cit y Sanitar y Distric t an d som e unincorporate d area s of Jackso n County . Som

e o f th e wastewate

r i s collecte d b

y th e Bea r Cree k Valley Sanitar

y Authorit y (BCVSA ) and pumpe d b

y apum p statio n locate d adjacen

t to th e treatment

plant . Th e facilit

y als o accept s leachate fro

mDi y Cree

k Landfill . N o septag e i s accepte d fo r treatment . Th e dr y weather flow s do no t

include th e hig h level s o f

infiltratio n and inflo w tha

t are associate d wit

h th e winter i n Oregon . Therefore , th e desig n dr y weathe r flows ar e used mostly t

o estimate ho w much treatmen t capacit y ther e i s fo r organi c loads . Fo

r thi s facility , th e averag e desig n dr y weather flow i s 2 0 millio n gallons/da

y (MGD) . Th e current

actua l dr y weathe r flow fo r Jun e throug h Octobe

r durin g th e las t tw o year s wa s 16.2

4 MGD , Base d o n the current flows , thi s facilit

y i s at 81. 2 percent

of treatment capacity . Th e curren t

actua l averag e wet

weathe r flow fo r Novembe r 200 0 through Ma

y 200 1 wa s 14.1 4 MGD . Th e pea k da y flow ove r th e pas t yea r wa s 17. 6 MG

D in Decembe

r 200u . However , th e previou s winter , th e averag e flo

w wa s 20, 0 MG

D wit h apea k da y o f 54. 8 MG D i n Apri l 2000 . Severa

l difference s hav e contribute d t o the change , Oregon i s currently experiencin g amajo r drought . A larg e industria l contributo r

obtaine d aseparat

e wastewate

r permi t an d significantly reduce d flows t o th e City' s treatmen t

system . I n addition , asignifican

t amoun t o f Inflo w an d Infiltratio n (I/I ) wor

k ha s been complete d in th e collectio n systems . I t i s unknown exactly ho w much o f th e reductio n i s attributabl e to eac h factor . See th e sectio n o n Inflo w an d Infiltratio n (I/I ) fo r afurthe r discussio n o f

winter flows an d hydrauli c capacit

y issues . Th e permitte e i s responsibl e onl y fo r tha t portio n o f th e collectio n syste

mowne d an

d operate d b

y th e Cit y o f Medford , Othe

r jurisdiction s ar

e responsibl e fo

r th e collectio n system s withi n their respectiv e boundaries . A s lon g a s th e phase d improvement s continu e to sta y apac e o f growth , th e Department

doe s no t se e the nee d fo r requirin g aspecific , majo

r upgrade o f

treatment facilities . Biosolid s Managementan d Utilizatio n Th e permittee' s biosolid s managemen t pla n wa s approve d Augus t

22,1988 . Al l wast

e sludg e mus t

b e manage d in accordanc e wit h the Department

approve d Biosolid s Managemen t Pla n t o ensur eCit

y o f Medford Evaluatio n Report Pag e 3 complianc e wit

h th e federa

l biosolid s regulation s (4 0 CF RPar t 503) . Th e permitte e ha s submitte d a n update d Biosolid s Management Pla n fo r Department

approval . Th e Department i s proposin g t o approv e th e pla

n a s apart o f thi s permi t

action . Afte r treatment necessar y t o compl y wit

h vecto r attractio n an d pathoge n reductio n requirements , th e Clas s B biosolid s ca

n b e beneficially land applie d o n site s in Jackso n County . The permitte e ma y continu e to utiliz e al l previousl y authorize d land applicatio n sites . An y futur e land applicatio n site s mus t confor mt o th e sit

e selectio n criteri ai

n th e Biosolid s Management Pla n and mus t

b e i n Jackso n County , Pas t

analyse s indicat

e tha t th e Biosolid s qualit

y i s equivalen t

to Clas s A , however , th e processin g procedure s ar

e Clas s B and th e Cit

y land applie s th e Biosolid s a s Clas s B . Wast e secondar y sludg e i s pumpe d t o th e 2-mete r gravit y bel t thickener whic h thicken s th e sludg e to approximately 5 percent

solids . Th e primar

y sludg e (als o abou t

4 t o 5 percent

solids ) an d th e thickene d waste activate d sludg e ar

e pumpe d to th e anaerobi c digesters . Eac h digester i s 8 5 fee t i n diameter an d 34. 2 fee t deep . A thir

d digester i s n o longe

r used . Th e digeste d sludg e i s pumpe d t o on e o f fou r sludg e storag e lagoon s (tota

l surfac e are ao f

12. 5 acres . Th e lagoon s ar e currently bein g rehabilitate d wit h liners , Sludg e remove d fro mth e sludg e lagoon s i s sprea d ont o 3 0 acre s o f

dryin g beds . Drie d sludg e ma y b e land applie d a s biosolid s o n almos t 120 0 acre s o f far mland a t agronomi c rate s o

n eight differen t sites . Beneficia

l lan d applicatio n i s currently performe d durin g the summe r o n Department approve d site s in Jackso n County . Th e permitte e produce s approximatel y 285 6 dr y metri c ton s o f biosolid s pe

r year . Th e propose d permi t

require s monthly reportin g o f th e method s use d t o comply wit h vector attractio n an d pathoge n reductio n requirements . Volatil e solid s reductio n i n th e biosohd s i s th e proces s use d t o demonstrat

e complianc e wit

h vecto r attractio n reductio n requirements . Monitorin g o f volatil e solid s reductio n i s propose d in th e renewa l permit . Feca

l colifor mtestin g of

th e biosolid s i s th e proces s used to demonstrat

e complianc e wit

h pathoge n reductio n requirements . Monitorin g fo r feca l colifor m content i s propose d in th e renewa

l permit . Waste sludg e accumulation s ca n als o b e dispose d o f

a s asoli d waste i

n alandfill . Durin g the las t tw o years , virtuall y all o f

th e waste sludg e ha s been dispose d o f a s dail y cove

r in Dr y Cree k Landfill . Unles s th e waste sludg e i s beneficially lan d applied , i t

i s no t considere d biosolid s an

d complianc e wit

h th e federa l biosolid s regulation s (4 0 CF R Par t 503 ) i s no t

required . Whe

n th e wast e sludg e i s landfilled , monitorin g t o confir mcomplianc e wit

h biosolid s regulation s i s no t necessary . Instead , proper monitorin g i s t o b e prescribe d b y th e receivin g landfill i

n accordanc e wit

h th e soli d waste rules . A n annua l sludg e disposa

l repor t i s require d b

y Februar y 1 9 eac h yea

r regardles s o f

whethe r th e biosolid s ar

e land applie d o r

dispose d o f

a s waste . The permitte e conduct s chemica l testin g o f

biosolid s that include s analysi s fo

r severa l metals . Th e result s o f

th e monitorin g performe d fo r th e 200 0 annua

l repor t i s foun d below : Tabl e 1 - Biosolid s Metal s Result s fo r 200 0 Paramete r Arseni c Cadmium Chromium Coppe r Lea d Mercur y Mg/dr

y Kg 0.86 1 2.5 3 38. 2 78 7 79. 9 1.2 2 §503.1 3



### tabl e 3 Limi t 4 1 mg/k g 3 9 mg/k g N o limi t 1500 mg/k g 30 0 mg/kg 1 7 mg/kg Parameter

Molybdenum Nicke l Selenium Silve r Zin c Mg/dr y K g 7.4 2 37. 1 4.2 7 39. 5 70 6 §503.1 3 Tabl e 3 Limi t N o limi t 42 0 mg/k g 10 0 mg/kg N o limi t 280 0 mg/kg Inflo w an d Infiltratio n (T/ D High storm-relate d flows hav e historically occurre d a t thi s facility . Excessiv e flows woul d impede settlin g i n th e secondar

y clarifier s leadin g to poor

effluen t quality . However , given th e current droughtCit

y o f Medford Evaluatio n Repor t Pag e 4 conditions , th e reductio n i

n flow s fro malarg e industria

l use r and th e I/ I wor k tha t ha s been completed , excessiv e flow s d o no t

appea r to b e asignifican

t problemat

thi s time . Prio r to 1996 , th e Cit

y o f Medfor d di d no t routinely repor

t sewag e overflow s o f

th e sanitar

y sewag e system . A Notic e o f

Noncomplianc e (NON) wa s issue d fo r failur e to repor t ara w sewag e overflo w tha

t occurre d durin g th e hig h rainfal l even t of Decembe r 1996 . On Marc h 18,1997 , th e Department issue d aNotic e of

Permi t Violatio n i

n relatio n to thi s overflow . Sinc e tha t time th e Cit

y ha s reporte d th e following overflows : Tabl e 2 - Ra w Sewag e Overflow s Sinc e 199 6 Dat e 12/4/96

- 12/10/9 6 12/30/96

- 1/2/9 6 3/21/9 7 5/13/9 7 7/9/9 7 8/15/9 7 8/18/9 7 8/23/9 7 11/14/9 7 11/28/9 7 12/26/9 7 2/8/9 8 2/21/9 8 5/27/9 8 7/28/9 8 9/14/9 8 9/18/9 8 9/21/9 8 9/22/9 8 10/11/9 8 10/12/9 8 11/21-23/9 8 Locatio n

Howar d Avenu e Variou s Location s Northwoo d Roa

d Mai n an d Lewi s Washingto n S . o f Mai n Newtow n and 8 Street s Grap e an d 11 t h Street s Willamett e Avenu e 14t h & Kin g Street s Pal m& Ros e Street s 81 6 4 t h Stree t Murph y Roa d Sout h ofBarnet t 153 9 Gran d Ave . Columbu s Ave . an d Bryan t Stree t 303 4 Lon e Pin e Rd . 1504KenyonSt . Olympi c Ave . 32 1 Nort h Iv y 8 t h & Mistleto e 191 7 Robert s R

d 167 0 Robert s R

d l l m & Hamilto n Amount

Release d >70,00 0 gallon s

~ 3,000,00 0 gallon s 7 5 gallon s > 15,00 0 gallon s 5 0 gallon s 10 0 gallon s 5 gallon s 2 5 gallon s No t reporte d No t reporte d No t reporte d No t reporte d 800 gallon s 5 0 gallon s 300 0 gallon s 10 0 gallon s 50 0 gallon s 2 5 gallon s 5 0 gallon s 40 0 gallon s 75 0 gallon s No t reporte d Effected

Strea m Bea r Creek Bea r Creek Bea r Cree k Bea r Creek Bea r Cree k Bea r Creek Bea r Creek Bea r Creek Bea r Creek Bea r Creek Bea r Creek Bea r Creek Bea r Creek Lon e Pin e Creek Bea r Creek Bea r Creek Bea r Creek Bea r Creek Bea r Creek Bea r Creek Bea r Creek Caus e

Excessiv e I/

I Excessiv e I/

I Mainlin e plugge d wit h rag s an d debri s Excessiv e I/

I Mainlin e plugge d wit h rag s an d debri s Mainlin e plugge d wit h rag s an d debri s Mainlin e plugge d wit h rag s an d debri s Mainlin e overflowe d whil e clearing . N o Writte n Repor

t N o Writte n Repor

t N o Writte n Repor

t N o Writte n Repor

t N o Writte n Repor

t Mainlin e plugge d wit h rag s an d debri s Blockag e Blockag e Constructio n debri s blockag e Privat e lateral plugge d Rag Blockag e Greas e Blockag e Greas e Blockag e Excessiv e I/

ICit

y o f Medford Evaluatio n Repor t Pag e 5 Tabl e 2 - Ra w Sewag e Overflow s Sinc e 199 6 (Continued ) Date 11/21-23/9 8 11/21-23/9 8 11/21-23/9 8 9/30/199 9 Locatio n

Gran d & Ruski n Merrima n & Morningsta

r Coron a& Gran d 144 4 Angelcres t Driv e Amount

Release d No t reporte d No t reporte d No t reporte d 50 0 gallon s Effected

Strea m Bea r Creek Bea r Creek Bea r Creek Lazy Cree k Caus e

Excessiv e I/

I Excessiv e I/

I Excessiv e I/

I Blockag e Shoul d excessiv e flows fro

mth e BCVS A collectio n syste moccur , th e exces s volum e i s pumpe d t o lagoon s owne d an

d operate d b y BCVS A (under aseparat e NPDE S permit) tha

t ar e adjacen t t o th e treatmen t facility . Th e Regiona

l Wate r Reclamatio n Facilit

y operatio n ca

n b e greatly affected b

y I/ I fro mth e othe

r tributar y collectio n systems . In aNO N date d July 12,1999 , th e Department requeste d tha t th e Cit y initiate discussio n wit

h owner s o f

th e tributar

y collection s system s fo

r mor e aggressiv e I/

I reductio n programs . Thi s wa s becaus e th e violation s note d i n that NO N were partiall y th e resul t o f excessiv e I/

I in th e tributar

y collectio n systems . If

ra w sewag e overflow s occu r

withi n th e tributar

y system s o r i f excessiv e flow s caus e recurrin g permi t limit violations , th e Department ma y requir e mor e forma l actio n o n th e par

t o f th e permitte e and/o r

tributar y syste mowners , Th e propose d permi t

include s aconditio n requirin g implementatio n o f aI/ I reductio n progra

man d submitta l o f a n annua l repor t o n I/ I reductio n activitie s withi n th e Cit y o f Medfor d collectio n syste

m only . In orde

r t o obtai n th e winter

perio d mas s loa

d limit s fo r BO D an d TS S base d o

n we t weather flow, al l inflo w mus t

b e remove d fro

mth e collectio n system . Th e Cit y doe s no t hav e th e necessai y lega l authorit y ove r al l portion s o f

th e sewer systemto requir

e inflow removal . Th e BCVS A ha s expresse d interes t

an d i s proceedin g t o obtai n tha t responsibilit

y withi n thei r

NPDE S permit . Pretreatmen t Cit y o f Medfor d implement s a

n industria l pretreatment

progra mtha t wa s originall y approve d b y th e Department

o n Jul y 7,1983 . Th e Department approve d modification s to th e City' s Pretreatment progra mordinanc e o n Augus t

31,1992 . Th e Departmen t approve d modification s t o th e City' s pretreatmen t

progra mimplementatio n procedure s o n Jun e 6,1994 . Th e Department approve d modification s t o th e Cit

y s loca l limit s o n Februar

y 13,1995 . Federa

l an d state pretreatment requirement s were include d i n th e NPDE S permi t

fo r thi s facilit y when th e previou s permi t wa s issued . Th e Cit y o f Medfor d currently permit s 2 1 significan t industria l users . Pretreatmen t

Complianc e Inspectio n (PCI ) of

th e industria

l pretreatmen t

progra mwa s conducte d o n Apri l 1 3 an d 14 , 2000 . Th e primar y focu s o f th e PC I wa s to evaluate th e accurac y o f th e informatio n provide d i n previou s annua

l report s and th e adequac y o f progra mimplementatio n an

d industria l use r complianc e record s an

d files. A s aresul t

of th e PCI , th e Department' s repor t date d Apri l 19,200 0 liste d on e NPDE S permi t violation , tw o require d action s an d tw o recommende d actions . Th e City' s respons e date d Ma y 10 , 200 0 an d follow-u p informatio n provide d o

n Jul y 21,200 0 indicate d t o th e Department tha t all o f th e require d an d recommende d action s ha d been or wer e i n th e proces s o f

bein g adequatel y addressed . Schedul e E , Conditio n 12 , o f th e current

permi t require s th e Cit

y t o submi t substantia l pretreatment progra mmodificatio n request s t o th e Department fo r approval . Th e Cit

y submitte d areques t

fo r modificatio n o f

it s loca l limit s o n Octobe

r 20,2000 . Th e Departmen t propose d to approv e th e modification s o n Novembe r 8,2000 . Th e Cit

y issue d apubli c notic e o f

th e propose d modification s an d th e Department' s inten

t t o approv e them . O

n Januar y 9,2001 , th e Cit

y notifie d th e Departmen

t tha t i t ha d complete d th e publi c revie w proces s an d di d no t receiv e substantia

l comment s o r

areques t fo r a publi c hearing .Cit

y o f Medford Evaluatio n Report Pag e 6 Th e Department

notifie d th e Environmenta l Protectio n Agenc y (EPA) , Regio n 10 , o f ou r intent to approv e th e City' s modification s and afforded EP A th e requisit

e thirt y (30 ) day s t

o objec t t o the Department' s approval , pursuant t o 4 0 CF R 403.11(d) . The EP

A di d no t objec t t o th e approval . O n Marc h 8,2001 , th e Departmen t approve d th e City' s Technicall y Base d Loca l Limits . Federa

l pretreatment

regulation s (cf. , 4 0 CF

R 403.18 ) requir

e tha t thes e modification s b e incorporate d int o th e City' s NPDE S permit . Therefore , th e Department i s incorporatin g th e ne w loca l limit s int o th e City' s NPDE S permi t

renewa l wit h th e re-issuanc e o f

th e permit . Pollutants Discharge d Th e current

permi t allow s th e Cit

y of Medfor d to discharg e treate d effluen t fro mth e wastewate

r treatmen t plant year-round . Th e currentpermi t set s limit s o

n th e following pollutants : Five-da y Biochemica

l Oxyge n Demand (BODs) , Tota

l Suspende d Solid s (TSS) , Feca l Colifor m(FC ) bacteri a an d Total Residua

l Chlorine . Th e discharg e i s als o regulate d fo r p H an d pollutant

remova l efficiency . Outfall s Treate d wastewate

r i s discharge d year-roun d through ane w 54-inc h pip e to th e Rogu e Rive r a t river mil e 130. 5 (se e Attachment #T) , Th e outfall (designate d Outfal l 001 ) ha s amulti-por

t diffuse r wit h a pea k capacit y o f 10 0 MGD . Thi s ne w outfall wa s constructe d t o improv e th e mixin g an d hydrauli c capacit y o f th e previou s outfall (designate d Outfal l 001A) , Outfal

l 001 A discharge s throug h a4 2 inch pip e t o ashorelin e outfal

l through avorte x energ y dissipatio n structure , whic h entrain s air int o th e effluen t an d produce s foa

mnea r th e outfall . Th e ol d outfal

l i s still functiona

l and ca n b e use d fo

r emergenc y purposes . Th e combine d capacit y o f th e tw o outfall s i s 17 0 MGD . Th e permitte e ha s requeste d ane w outfall fo r th e irrigatio n o f

Level I V reclaime d water . Thi s new outfall i s designate d Outfall 00 2 (se e belo w fo r discussio n of

current Outfall 002. ) Other outfall s ar

e fo r emergenc y us e only . Discharge s o f untreate d sewag e ar

e permitte d onl

y i f th e caus e i s a n upset conditio n o

r i f th e discharg e i s cause d b

y asubstantia

l stor meven t a s defined late

r i n thi s report . Outfall s 00 2 through 00 8 wer e include d i

n the previou s permit . Outfall s 00 2 (Railroa d Par k a t Hw y 6 2 and Bea

r Creek ) and 004 (Crate

r Lak e Avenu e pum

p statio n at

346 0 Crate

r Lak e Avenue ) hav e been eliminate d and wil l b e delete d fro mth e permit . Sinc e th e existin g permi t

wa s issued , ane w pum

p statio n ha s been constructed , Th e overflo w point fo r th e Kin g Cente

r pum p statio n i s designate d Outfal l 009 . I n 1999 , th e facilit

y upgrade d th e headworks . A s par t of thi s expansion , ane w influen t diversio n structur

e wa s constructed . Th e purpos e o f th e diversio n structur

e i s to diver

t aportio n o f

th e influen

t sewag e int

o th e stor mdrainag e syste

mto protec t th e facilit y fro mphysica l damag e when influen

t flows get to o high . Th e ne w overflo w poin t fo r tni s diversio n structur

e i s include d i

n thi s permi t

a s Outfall 010 . Th e emergenc y outfall s ar

e liste d a s follows : Tabl e 3 - Emergenc y Overflow s Point s Outfall 00 3 00 5 00 6 00 7 00 8 Outfall Locatio n

Airpor t P.S. , Manhol e #1G4 0 3500 Medc o Hau l Roa

d Fairview/Greenwa

y P.S. , Manhol e #6J1 6 Fairvie w & Greenwa

y Montcres t P.S. , Wetwell Manhol e Sout h o f Donnale e Driv e Arm y Reserv e P.S. , Manhol e #5D1 4 Columbu s & McAndrew s Broa d Street P,S „ Manhol e #5D 6 Broa d & Taf t Discharg e Locatio n Midwa y Cree k Eas t Irrigatio n Cana

l t o Larson/Bea

r Creek s Unde r 1- 5 int o Bea r Cree k Drainag e Ditch/Stor

mDrain t o Bea r Cree k Drainag e Ditch/Stor

mDrain t o Bea r Cree kCit

y o f Medfor d Evaluatio n Report Pag e 7 Tabl e 3 - Emergenc y Overflow s Point s (Continued ) lOiitfal l 00 9 01 0 Outfal l Locatio n

Kin g Cente

r P.S. , Manhol e #0G1 8 Commerc e Dr . & Cardina

l Wa y Influen t Diversio n Structur

e Discharg e Ldteafid n Midwa y Cree k Stormwate

r Outfall Receivin g Streams/Impac t Th e water qualit y standard s fo

r th e Rogu e Basin (Orego n Administrativ e Rule s 340-41-0365 ) are intende d t o b e protectiv e o f th e beneficia

l use s fo r th e basin . Treate d wastewate r i s discharge d t o th e Rogu e Rive

r a t river mil e 130.5 . A t thi s location , th e Rogu e Rive r i s wate r qualit y limite d fo

r temperature ( based o

n salmoni d rearing ) durin g th e summe

r months . Th e Rogu e Rive

r i s als o water

qualit y limite d fo

r bacteri a(base d o n water contac t recreation ) durin g fall , winte r an d spring . Discharge s o f

disinfecte d wastewate

r tha t ar e in complianc e wit

h th e permi t

limit s shoul d no t

contribute t o violation s o f

th e instrea

mbacteria l standards . The therma

l loa d i n th e permittee' s discharg e likely contribute s t o th e wate r qualit y temperature violations . A Total MaximumDaily Loa d (TMDL) fo

r temperature i s schedule d t o b e complete d fo r th e Rogu e Basi n i

n 2004 . Th e TMD L wil l assig n therma l Wast e Loa d Allocation s (WLA ) t o mos t discharge s i

n th e basin . Th e Departmen t wil l rene w th e NPDE S permit s an d incorporat e th e therma

l WLA s a s permi t

limits . Th e NPDE S permit s i n th e Middl e Rogu e ar

e schedule d fo

r renewa l in 2005 . The permi t

contain s areopene

r claus e allowin g th e Department to modif y th e permi t

an d include th e therma l WL A a s apermi t

limit . Onc e th e therma

l WL A i s incorporate d a s apermi t limit , th e Cit

y wil l hav e t o implemen

t th e correctiv e actio n pla n require d b y thi s permi t

i n orde r t o comply wit

h th e ne w limit . Th e Temperatur e Management

Pla n (TMP ) that

th e Department

propose s t o approv e a s apar t o f thi s permi t

actio n include s evaluation s o f

interna l managemen

t practice s an d treatment

and/o r disposa l alternative s neede d to com

e into compliance . Th e City' s preliminar y evaluatio n indicate s they wil l discontinu e all discharge s t o th e Rogu e Rive r durin g a t leas t par t o f th e summe

r period . Th e Department

ha s complete d a

n Antidegradatio n Revie w Sheet (se e attachment

4) tha t support s th e issuanc e o f

thi s permit . Th e Departmen t i s no t awar e o f an y other water qualit y violation s tha

t ma y b e attributabl e t o thi s source . Temperatur e Strea mtemperature s are generall y risin g throughout th e State o f

Oregon and man

y stream s excee d th e applicabl e trigger

temperature i

n th e summer , Th e applicabl e trigger temperature fo

r rearin g an

d spawnin g ar

e amaximu mo f

64° F an d 55° F respectively , base d o n aseven-da y averag e o f

maximum daily temperature readings . Point sourc e discharger s are require d t o help stop an d revers e th e warmin g trend . I n orde r to prevent furthe r warming , mos t

discharg e permit s wil l identif y th e maximumallowabl e therma l discharge . Th e permi t mus t als o prohibi t

furthe r increases . Th e temperature standar d prohibit s discharger s fro

m causin g ameasurabl e increas e i n strea mtemperature unde

r certai n conditions . Th e tw o condition s tha t apply t o th e Cit

y o f Medfor d discharg e are :

• Whe n th e strea mtemperature exceed s 64° F whil e salmoni d rearin g occurs ; and , • Whe n th e streamcontain s Threatene d an d Endangere d specie s an

d th e increas e woul d impair thei r biologica l integrity . Salmoni d Rearin g The stream s in thi s basi n are wate r qualit y limite d fo

r temperature i

n th e summe

r an d ma y no t full y suppor t th e rearin g o f

salmoni d species . Th e propose d permi t addresse s th e potentia

l impac t o f thi sCit

y o f Medford Evaluatio n Repor t Pag e 8 discharg e o n strea

mtemperature , Th e effluen t temperatur

e at som e time s o f th e yea r exceed s th e applicabl e trigger

temperature . However , th e effluen t i s no t expecte d to excee d 77 ° F at any time . 77 ° F i s considere d t o b e letha

l fo r salmonids . The effluen

t wil l caus e ameasurabl e increas e of temperature a

t times , a t th e edg e o f

th e mixin g zone . A "measurabl e increase " i s defined a s greate r tha n a0.25 ° F increas e a

t th e edg e o f

th e mixin g zone , factoring i n th e effluen

t temperatur

e an d dilutio n a

t th e edg e o f

th e mixin g zone , an

d usin g th e applicabl e strea

mtrigger temperature . Threatene d and Endangere d Specie s Beside s th e perio d when th e Rogu e Rive r exceed s th e trigger

temperatur

e o f 64°F , th e City' s discharg e canno t caus e ameasurabl e increas e i n strea mtemperatur

e i f threatene d or

endangere d specie s ar

e present , Alternatively , th e Permitte e mus t show tha t the increas e i

n strea mtemperature wil l no t

affec t th e biologica

l integrit y of th e threatene d o

r endangere d species . Coh

o Salmon ar

e athreatene d specie s an d ar e present in th e Rogu e Rive

r year-round . The City' s discharg e ca

n caus e ameasurabl e increas e yea r round unde

r certai n condition s an

d coul d therefor e potentiall y impac t

Coh o Salmo n durin g adult migratio n an

d durin g juvenil e rearing . The trigger temperature fo

r thes e beneficia

l use s i s 64°F . Coh o us e tributar y stream s fo

r spawnin g and incubatio n and are no t

present in th e Rogu e Rive

r fo r tha t beneficia l us e (whe n th e trigger

temperatur

e i s 55°F) . Whe n th e Department' s Temperatur e Standar d wa s modifie d in 1996 , th e Issu e Pape r prepare d b

y th e Temperatur

e Subcommitte e include d adetaile d discussio n o f th e temperatur

e requirement s o f

Coh o Salmon b y lif

e stage . Base d o

n studie s b y Reise r an d Biornn (1979 ) an

d Bret t (1952) , th e Orego n Department

o f Fis h an d Wildlif e identifie d th e preferre d juvenil e rearin g temperature a s between 11.8° C (53.2°F) and 14.6° C (58.3°F) . Ifjuvenil e fish inhabi t colde r water s tha

n th e preferre d temperatur

e durin g winter , th e likely effec t i s reduce d growt

h rate s a t tha t tim e o f year . Obviously , colder winter temperature s ar

e par t o f the natura l therma l regime an

d d o no t impair biologica l integrity , Adul t migratio n ca

n occu r ove r amuch wide

r rang e o f temperatures , The

y ca n migrate i n strea

m temperature s between 7.2° C (45.0°F) an d 15,6° C (60.1°F) . Th e lowes t

Rogu e Rive

r flow s (and therefor

e th e perio d wit

h th e lowes t

availabl e dilution ) generally occu r durin g lat e Septembe

r through early November , Base d o n th e temperatur

e dat apresented , th e instrea mtemperature drop s rapidly afte r th e war msumme r perio d an d i s wel l belo w 55° F befor

e th e end o f September . Minimumstrea mtemperature s ar

e slightly ove

r 40°F . Strea

mtemperature s consistently remai n belo w 50° F fo r up to 6 month s befor

e slowl y warmin g u

p again . Durin g critica

l cas e winter

condition s (minimu

mdilutio n wit

h maximu mtemperature differential) , th e City' s discharg e coul d resul t i n atemperatur

e increas e outsid e th e mixin g zon e of abou t 1,5°F , Thes e condition s coul d only occu r whe n minimu mstrea mflow an d temperatur

e coexis t wit h maximum effluen t flow and temperature . Whil e thes e condition s ar e theoreticall y possible , th e Department doe s no t believ e i t i s realisti c t o expec t

t o se e atemperatur

e increas e o f

tha t magnitude . In addition , a Departmen

t aquati c biologis t

doe s no t believ e ameasurabl e increas e a t thi s time o f

yea r woul d impac t th e foo d organism s fo

r an y salmoni d specie s (se e attachment 5) . Th e mem

o state s i t i s no t likel y tha t suc h a n increas e in temperatur

e woul d alte

r th e biologica

l integrit y o f th e invertebrat

e communit

y o r impac t th e foo d bas e fo r salmonids . Whil e th e increas e woul d b e measurabl e unde r thes e circumstances , th e Cit y contend s tha

t th e biologica l integrit y o f th e Coh o salmo n would b e ensure d becaus e th e strea mtemperatur

e woul d b e lowe r tha n th e preferre d rearin g temperatur e an d ar e generall y a

t th e lowe r en d o f (or lowe r than ) th e migratio n temperature range . The Departmen t generally agree s wit

h thi s assessment . If n o effluen t i s discharge d durin g all o r par t o f th e summe

r an d ther e i s no impac t

o n th e biologica

l integrit y when ambient

temperatur

e ar e ver y cold , th e only remainin g concer n woul d b e durin g th e shor t period s when strea

mtemperature s ar

e nea r th e importan

t trigger temperatures . Becaus e thes e period s ar e s o short , i t

i s no t likely tha t eve n ameasurabl e temperatur

e increas e woul d impac t

the biologica l integrit y o f th e Coh o salmon .City o f

Medford Evaluatio n Report Pag e 9 However , th e potentia

l shoul d b e evaluate d afte

r th e period s o f

discharg e are finally determined . Therefore , th e propose d permi t include s aconditio n requirin g submitta l o f a n approvabl e pla

n and schedul e fo

r comin g int

o complianc e wit

h th e temperatur

e wast e loa d allocatio n b

y n o later tha n 6 month s afte

r issuanc e o f

th e Rogu e Rive

r Tota l Maximu mDaily Loa

d (TMDL ) o r

wit h th e next permi t renewal applicatio n (whicheve r i s later) . Th e pla

n mus t als o evaluat

e th e potential fo

r impact s o n th e biologica l integrit y o f Threatene d and Endangere d Specie s tha t ma y b e present

durin g th e discharg e period . Temperature Managemen

t Pla n A Total Maximu

mDaily Loa

d (TMDL ) addressin g th e wate r qualit y limite d statu s fo

r temperature ha s no t ye t been approve d fo

r th e sub-basin . Unti l th e TMD L i s issue d and aWast e Loa d Allocatio n i s assigned , th e purpos e of

aTM P i s t o sho w ho w th e sourc e will reduc e it s therma l loadin g to th e strea

m rathe r tha n schedul e th e improvement s necessar y t o come int

o compliance . Th e Cit y ha s submitte d aTM P to th e Department fo r approva l o n December

18,200 1 and amende d th e submitta l o n Apri l 25,2002 , Temperature monitorin g mus t b e conducte d i

n accordanc e wit

h th e TMP . Othe r component s o f

th e TM P hav e been include d i n Schedul e C o f

thi s permit . They include submitta l o f a n evaluatio n of

interna l and externa

l managemen

t practice s and submitta

l o f apla n an d schedul e fo

r comin g int

o complianc e wit

h th e therma

l wast e loa d allocation . Th e Department

i s proposin g t o approv e th e City' s TMP . Applicabl e portion s o f th e TM P hav e been incorporate d into th e permit , A s lon g a s th e Cit y complie s wit

h th e requirement s o f

th e TMP , th e Cit

y shal l no t b e deeme d t o b e causin g o r contributin g t

o aviolatio n of

th e numeri c temperature criterio n (OAR 340-04 l-0026(3)(a)(D)(vi)) . Groundwate r Base d o n th e Department' s current information , thi s facilit

y ha s alow potentia

l fo r adversely impactin g groundwate

r quality . Therefore , th e Schedul e D o f th e propose d permi t

state s tha t no groundwate

r evaluation s wil l b e require d durin g thi s permi t cycle . Th e permi t

als o include s aconditio n i n Schedul e A tha t prohibit s an

y advers e impac t

o n groundwate

r quality . Stormwate r Stormwate

r i s no t addresse d i

n thi s permit . Genera

l NPDE S permit s are require d fo r wastewater treatmen t facilitie s wit

h adesig n flow o f

mor e tha n 1 MG D wit h stormwate

r discharges . Th e Cit

y ha s registere d thei r

assignment

t o th e current

Genera l 1200- Z NPDE S Permit . Th e Cit y receive d tw o Notice s of Noncomplianc e (date d Septembe r 12,199 4 an

d Novembe

r 16 , 1994) fo

r violation s o f

th e Genera l NPDE S Stormwate

r Permit . Complianc e Histor y Thi s facilit

y wa s las t inspecte d Augus t

8,200 1 an

d wa s foun

d to b e operatin g i

n compliance . Th e monitorin g report s fo

r thi s facilit y wer e reviewe d fo

r th e perio d sinc e th e current permi t wa s issued , includin g an

y action s take n relatin g to effluen t violations . Th e permi t

complianc e condition s were reviewe d an

d al l inspectio n report s fo

r th e sam e perio d wer

e reviewed . Base d o n thi s review , th e followin g violation s hav e bee n documente d a t thi s facilit y durin g th e ter

mo f th e current

permit : Tabl e 4 - Enforcemen

t Action s Sinc e 199 5 Dat e o f Violatio n 7/21/199 5 12/20/199 6 Typ e o f Enforcement

Actio n Notic e o f Noncomplianc e Notic e o f Noncomplianc e Descriptio n o f Violatio n Facilit y alteration s withou t Departmen t

approval Failure t o promptl y notif

y an d failur e t o submi t

complet e repor

t regardin g overflo wCit

y o f Medford Evaluatio n Report Pag e 1 0 Tabl e 4 - Enforcemen t Action s Sinc e 199 5 (Continued ) Date o f Violatio n 3/18/199 7 8/17/199 7 7/12/199 9 4/19/200 0 Typ e o f Enforcement

Actio n Notic e o f Permi t Violatio n Notic e o f Noncomplianc e Notic e o f Noncomplianc e Notic e o f Noncomplianc e Descriptio n o f Violatio n Violation s regardin g th e overflo w a s note d abov e Violatio n ofBOD s and TS S concentration , mas s loa

d an d percen t remova l limit s Violatio n o f

BOD 5 and TS S mas s loa d an d chlorin e concentratio n limit s Industrial Pretreatmen t

Progra m deficiencie s Man y o f th e abov e violation s hav e been corrected . Th e BOD 5 an d TS S violation s wer

e relate d t o floo d conditions . Unles s damag e t o th e facilit y and/or activate d sludg e biomas s results , th e Departmen t encourage s treatment

facilitie s t o reduc e ra

w sewag e overflow s b

y maximizin g flows throug h th e treatmen t plant . Th e Departmen

t consider s thi s facilit

y to b e i n substantia

l complianc e wit

h th e term s o f th e current

permit . PERMI T DISCUSSIO N Fac e Pag e Th e permitte e i s authorize d to construct , install , modify , o r operat e awastewater

collection , treatment , contro l and disposa

l system . Permit s discharg e of treate d effluen

t t o th e Rogu e Rive

r an d b y spra y irrigatio n o f

Level I V reclaime d wate

r withi n limit s set

b y Schedul e A and th e following schedules . Eight emergenc y outfall s ar

e als o listed , All othe

r discharge s ar

e prohibited . Th e ter mo f th e permi t

wil l b e 5 year s fro

mdat e o f issuance . Schedul e A - Wast

e Discharg e limitation s BO D an d TS S concentratio n and mas s limit s Base d o n th e Rogu e Basin minimumdesig n criteria , wastewate r treatmen t resultin g i

n amonthly averag e effluen

t concentratio n o f

1 0 mg/ L fo r BOD 5 o r carbonaceou s biochemica

l oxyge n deman d (CBOD5 ) an

d TS S mus t

b e provide d fro

mJun e 1 - Octobe

r 31 . FromNovembe

r 1 - Ma y 31 , a minimumo f

secondat y treatment

o r equivalent

contro l i s required . Secondar y treatment

fo r thi s facilit y i s defined a s monthly averag e concentratio n limit of 3 0 mg/ L fo r BOD 5 (o r 2 5 mg/ L fo r CBOD 5 ) an d 3 0 mg/ L fo r TSS . Th e Departmen

t i s proposin g concentratio n limit s a t leas t a s stringen

t a s th e basin minimumdesig n criteria . Th e Cit y ha s requeste d achang e fro mBOD5 to CBOD s i

n th e summer . Th e propose d monthly averag e summe r CBOD5 an

d TS S concentratio n limit s ar e 1 0 mg/ L wit h aweekl y averag e limi t

o f 1 5 mg/L . Th e propose d monthly averag e winter BOD 5 an d TS S concentratio n limit s ar e 3 0 mg/ L wit h aweekly averag e limi t

o f 4 5 mg/L . Th e summe

r mas s limit s fo

r CBOD 5 an

d TS S ar e based o n th e desig n averag e dr

y weathe r flow (ADWF) o f

2 0 MG D and th e monthly averag e CBOD 5 and TS S concentratio n limit s of 1 0 mg/ L and 1 0 mg/L , respectively . Th e only chang e i n th e summe

r concentratio n an d mas s limit s i s th e conversio n o f BOD 5 limit s to CBOD

5 limits . Th e Cit y ha s requeste d achang e i

n th e winte

r mas s loa d limit s fo r BOD5 and TS S i

n accordanc e wit

h OA R 340-4 1 -120(9)(a) . Th e Cit y identifie d th e desig n averag e we t weather flo w (AWWF

) a s 27. 1Cit

y o f Medford Evaluatio n Report Pag e 1 1 MGD . However , th e City' s analysi s used astrictl y proportiona l calculatio n considerin g only on e yea r (summe r 199 8 an d winter

1998/99) . I

n accordanc e wit

h aDE Q guidanc e memo date d Ma y 14,1993 , onl y on e hal f o f th e existin g I/

I ma y b e use d t o calculate th e AWWF . Usin g th e guidanc e memo and includin g asecon d yea

r (summe r 199 9 and winter

199/00 1 th e Department

determine d th e appropriat

e AWW F i s 25. 3 MGD . Th e mos t

recent yea r (summe r 200 0 an d winter 2000/01 ) wa s no t

used du e t o th e influence s o f

th e drought . Th e winte r mas s limit s fo

r th e facilit y ma y b e base d o

n th e AWW

F of 25. 3 MG D an d th e monthly averag e BOD S o

r TS S concentratio n limit s o f 3 0 mg/ L an d 3 0 mg/L , respectively . On an y da y tha t th e daily flow exceed s 4 0 MG

D (twic e th e desig n ADWF) , daily mas s loa d limit s shall no t

apply . However , th e Cit

y woul d b e require d t

o remov e al l inflo w source s fro mth e collectio n system . Th e Cit y doe s no t hav e th e lega

l authorit y necessar y to identif

y an d remov e inflow fro

mth e satellite collectio n system s an

d doe s no t wis h t o obtai n th e authority . Th e BCVS A ha s expresse d interes t and i s proceedin g t o accep t th e responsibilit

y fo r obtainin g th e lega

l authorit y an d implementin g th e inflow remova l progra mwithi n th e satellite collectio n systems . Schedul e A ha s tw o condition s relate d to BOD and TS S limits . Th e first sectio n contain s th e existin g permi t limit s base d o

n dr y weather flow year-round . Th e secon d sectio n contain s th e permi t limit s that wil l become effectiv e upo n either : 1 ) issuanc e o f arenewa l permi t to th e Bea

r Cree k Valley Sanitar

y Authorit y tha t include s th e provision s of

OA R 340-04 l-0120(9)(a)(G)(iv) ; or 2 ) submitta

l o f documentatio n t o th e Department tha t either Bea r Cree k Valley Sanitar

y Authorit y and/o r th e Cit y of Medfor d ha s acquire d and ha s accepte d th e necessar y lega l authorit y t o requir e remova l o f inflow source s i n al l portion s o f

th e sewe r syste mdischargin g int

o th e Regiona

l Wate r Reclamatio n Facility . Th e propose d permi t

include s aSchedul e C conditio n requirin g submitta l o f aprogra mand tim e schedul e fo

r identifyin g an

d removin g inflow withi n th e Cit y o f Medford' s collectio n system . Th e BCVS A i s in th e proces s o f obtainin g th e lega

l authorit y necessar y to identif y an d remov e inflow fro

m th e satellite collectio n systems . All mas s loa

d limitation s hav e been rounde d t o tw o significan t figures . Th e propose d limit s are : (1 ) Jun e 1 - Octobe

r 31 : Parameter CBOD s TS S Average

Conce i Monthly 1 0 mg/ L 1 0 mg/ L \ Effluen

t Titration s Weekly 1 5 mg/ L 1 5 mg/ L Monthly

Averag e lb/da y 170 0 170 0 Weekl

y Averag e lb/da y 260 0 260 0 Daily

Maximu m Lb s 340 0 340 0 (2 ) November

1 - Ma y 3 1 (upon issuance) : Parameter BOD , TS S Average

Conce i Monthly 3 0 mg/ L 3 0 mg/ L ; Effluen

t ltration s Weekl y 4 5 mg/ L 4 5 mg/ L Monthly

Averag e lb/da y 500 0 500 0 Weekl

y Averag e lb/da y 750 0 750 0 Daily

Maximum Lb s 10,000 10,000 (3 ) Novembe

r 1 -Ma y 3 1 (upon complianc e wit h OA R340-04l-0120(9)(a)(G)(iv) ) Parameter BOD s TSS " Averag e Effluen t Concentration s Monthly Week ! 3 0 mg/ L 4 5 mg/

L 4 5 mg/ L Monthl

y Averag e lb/da y 630 0 "53W " Weekly

Averag e lb/da y 950 0 

### 'WW Daily

Maximu m Lb s 13,000 13J000 3 0 mg/ L Calculations : (1 ) Summe

r CBOD 5 an

d TS SCit

y o f Medford Evaluatio n Repor t Pag e 1 2 fa

) 2 0 MG

D x 8.3 4 #/ga

l x 1 0 mg/ L monthly avg . = 170

0 lbs/da y (b ) 170

0 lbs/da y monthly avg . x 1.

5 = 2600 lbs/da

y weekl y avg . (c ) 170

0 lbs/da y monthly avg , x 2. 0 = 340 0 lbs/da y dail y max . (2 ) Winte

r BOD s and TS S (upo n issuance ) (a) 2 0 MG

D x 8.3 4 #/ga

l x 3 0 mg/ L monthl y avg . = 5 00 0 lbs/da

y fb) 500 0 lbs/da

y monthly avg . x 1.5 = 750 0 lbs/da y weekly avg . (c ) 500 0 lbs/da

y monthly avg . x 2. 0 = 10,000 lbs/da y dail y max . (3 ) Winte

r BOD 5 an d TS S (upo n complianc e wit h OA R340-04 l-0120(9)(a)(G)(iv) ) (a) 25. 3 MG

D x 8.3 4 #/ga

l x 3 0 mg/ L monthly avg . = 633 0 lbs/da y (b ) 633 0 lbs/da

y monthl y avg , x 1.

5 = 949 5 lbs/da

y weekly avg . (c ) 633 0 lbs/da

y monthly avg . x 2. 0 = 12,660 lbs/da y daily max . A revie w o f

recen t monitorin g dataindicate s th e Cit y should generally b e abl e t o comply wit h th e permi t limits . Th e previou s permi t limit s fo r BOD5 an d TS S wil l b e chang e i

n tw o ways . Th e summe

r BOD 5 limit s change d to CBOD s limits . Th e winter perio d BOD s an

d TS S limit s wil l b e base d o n wet weathe r flow rather

tha n dr y weathe r flow upo n complianc e wit h OA R340-04 1 -0120(9)(a)(G)(iv) . BOD an d TS S Percent

Remova l Efficiency A minimumlevel o f

percent remova l fo r BOD S (or

CBODS ) an

d TS S fo r municipa l discharger s i s require d b y th e Cod

e o f Federa l Regulation s (CFR ) secondar y treatment

standard s (4 0 CFR , Par

t 133) . A n 8 5 percen t

remova l efficiency limit

i s include d in th e propose d permi t t o comply wit

h federa l requirements . A

n examinatio n o f

th e DM R dat aindicate s th e permitte e wil l hav e littl e difficult y meetin g th e limi t

wit h th e current

facilities . P H Th e Rogu e Basi n Wate

r Qualit y Standar d fo r p H i s foun

d i n OA R340- 4 l-0365f2)(d) . Th e allowe d rang e i s 6. 5 t o 8.5 . Th e propose d permi t limit s p H to th e rang e 6. 0 to 9.0 . Thi s limi t i s base d o n Federa l wastewater

treatment guideline s fo

r sewag e treatment

facilities , and i s applie d to th e majorit y of NPDE S permittee s i

n th e state . Within th e permittee' s mixin g zone , the wate r qualit y standar d fo r p H doe s no t

hav e to b e met . I t

i s th e Department' s belie f

tha t mixin g wit

h ambient water withi n th e mixin g zon e wil l ensur

e tha t the pH a t th e edg e o f

th e mixin g zone meet s th e standard , an d th e Departmen

t consider s th e propose d permi t limit s t o b e protectiv e o f

the water quality . Feca l Bacteri a The propose d permi t

limit s ar e based o n a n E. coli standar

d approve d in Januar

y 1996 . Th e propose d limit s ar e amonthly geometri c mea n o f 126 E. coli pe r

10 0 mL , wit h n o singl e sampl e exceedin g 40 6 E. coli per

10 0 mL , Th e ne w bacteri astandar d allow s tha

t i f asingl e sampl e exceed s 40 6 E coli pe r 10 0 mL , the n th e permitte e ma y tak e five consecutiv e re-samples . If the lo g mea

n o f th e five re sample s i s les s tha

n o r equa l to 126 , aviolatio n i s no t

triggered . Th e re-samplin g mus t b e taken a

t fou r hou r interval s beginnin g withi n 2 8 hour s afte r th e originalsampl e wa s taken . Th e bacteri alimit s for

irrigatio n of

level I V reclaime d wate

r ar e a7-da y media n o f 2. 2 organisms/10 0 mL , wit h n o sampl e to excee d 2 3 tota l colifor mper 10 0 mL . All propose d effluen t bacteria l limit s ar e achievabl e throug h proper

operatio n an

d maintenance . Chlorin e Residua l Disinfectio n o f

th e effluen

t wit h chlorin e i s th e proces s th e permitte e use s t o comply wit h th e wast e discharg e limitation s fo

r bacteria , Chlorin e i s aknown toxi c substanc e an d a s such i s subjec t

t o limitatio n unde

r Oregon Administrativ e Rules . Th e rul e (OA R340- 4 l-0365(2)(p) ) state s i n par t tha t toxi c substance s shal l no t

b e discharge d to water s o f th e stat e a t level s tha t adversely affect

publi c health , aquati c lif

e o r othe r designate d beneficia

l uses . I n addition , level s o f

toxi c substance s shal l no tCit

y o f Medford Evaluatio n Report Pag e 1 3 excee d th e criteri aliste d in Tabl e 2 0 whic h wer e based o n criteri aestablishe d b

y th e EP A an d publishe d in Qualit

y Criteri afo

r Wate r (1986) , unles s otherwis e noted . However , OA

R340-41-44 5 (4 ) state s tha t th e Departmen

t ma y allo w adesignate d portio n o f a receivin g water

t o serv e a s azon e o f

dilutio n fo

r wastewater s and receivin g water s t o mi x thoroughl y and thi s zon e wil l b e defined a s amixin g zone , Th e Departmen t ma y suspen d al l or

par t o f th e wate r qualit y standards , o

r se t les s restrictiv e standards , i n th e defined mixin g zone , provide d th e wate r withi n th e mixin g zon e i s fre

e o f material s i

n concentration s tha

t wil l caus e acut

e toxicit y to aquati c lif

e a s measure d b y th e acut

e bioassa y metho d an

d outsid e th e boundar

y o f th e mixin g zon e i s fre

e of material s i n concentration s tha

t wil l caus e chroni c toxicity. Furthermore , 4 0 CF

R §122.44(d) state s tha

t permi t limitation s mus t

contro l all pollutant s o

r pollutan t parameter s whic h ar

e o r ma y b e discharge d at

alevel whic h will cause , hav e th e reasonabl e potential t o cause , o r contribute t o a

n excursio n abov e an

y state water

qualit y standard , includin g state narrativ e criteri afo r water quality . Th e fresh water

criteri afo r chlorin e wer

e use d t o calculate permi t

limitations . Accordin g t o OA

R 340-41 , Tabl e 20 , chlorin e concentration s o f 1 1 ug/ L ca n resul t i n chroni c toxicit

y in fresh water s whil e 1 9 ug/ L ca n resul t in acut e chlorin e toxicit

y i n fresh waters . Complianc e wit

h acut e toxicit y criteri ai s require d at

th e edg e o f

th e Zon e o f

Immediat e Dilutio n (ZID ) an d complianc e wit

h chroni c toxicit

y criteri ai s require d a

t th e edg e o f

th e mixin g zone . Th e existin g permi t contain s th e followin g total chlorin e residua l limit : Shall no t excee d adail y averag e o f

0.03 8 mg/L . Th e previou s permit' s limi t wa s derive d b

y th e Departmen

t base d o n a

n estimate o f

th e dilutio n availabl e withi n th e mixin g zon e an d ZID . However , i

n 2000 , th e permitte e installe d amultipor t diffuse r t o enhanc e dilutio n withi n th e mixin g zon e an d reduc e potentia

l toxi c effects o n the receivin g stream . For

th e facility , outfall , an

d mixin g zon e a s presentl y configured , th e dilutio n factor s fo r th e ZI D an d mixin g zon e wer

e determine d durin g critica l low strea mflow condition s (84 6 cfs ) usin g th e CORMI X compute

r model . Th e dilutio n factor s a t th e edg e o f

ZI D an d mixin g zon e ar

e 2: 1 an d 13. 9 respectively . Th e new dilutio n value s wer e use d t o perfor

mareasonabl e potentia

l analysi s fo

r chlorin e (se e Attachment

#2) . Th e analysi s indicate d there wa s areasonabl e potentia l fo r chlorin e to caus e toxicit

y withi n th e receivin g stream . Therefore , permi t

limit s base d o n th e acut

e an d chroni c criteri awere calculated . Sinc e th e acut e and chroni c criteri aar

e base d o n differen

t durations , th e duration s hav e to b e equalize d usin g a n EP A spreadsheet

progra mto determin e th e mor

e restrictiv e criteri a(se e Attachment #3) . I n thi s case , th e acut

e criteri ai s th e mor

e stringent o f th e two . Thus , ne w end-of-pip e limit s base d o n that criteri aar e propose d i

n th e renewa

l permit . Th e ne w limit s stat e th e effluen

t shal l no t excee d a monthly averag e concentratio n o f 0.0 2 mg/ L and adaily maximumconcentratio n of 0.0 4 mg/L . Th e permitte e use s sodiumbisulfit e t o dechlorinate the effluen t prio r t o discharg e t o reduc e potentia l toxi c effects o n th e receivin g strea

mand meet

permi t limits . Th e permitte e shoul d b e abl e t o mee t th e limit s o n aconsistent

basi s wit h th e facilitie s available . Ammoni a Ammoni ai s asubstanc e normall y found i n wastewater . Th e wastewater treatmen t processes , particularl y aeratio n an

d biologica

l treatment , ca

n conver t alarg e portio n to nitrate an d nitrite but

th e treate d effluen

t stil l contain s som

e ammonia . Afte

r discharge , th e continue d proces s o f oxidizin g th e ammoni aremove s dissolve d oxygen fro mth e ambient

water . Unionize d ammoni ai s als o atoxic agen t an d mus t b e limite d t o prevent

toxicity . A s wit

h chlorin e residual , th e water

outside th e boundar

y o f th e mixin g zon e shall b e fre e o f material s in concentration s tha t wil l caus e chroni c (sublethal ) toxicit y whil e th e wate

r outsid e th e ZI

D mus t b e fre e of pollutant s that wil l caus e acut

e toxicity .Cit

y o f Medford Evaluatio n Repor t Pag e 1 4 If ammoni ama

y b e discharge d a

t alevel which will cause , hav e the reasonabl e potentia l t o cause , o r contribut e t o a n excursio n abov e an

y stat e water qualit y standar d (dissolve d oxyge

n or toxicity) , i

t mus t b e limite d b y th e permit . Th e ambient wate r condition s i

n th e Rogu e Rive

r severa l mile s downstrea

m fro mth e Cit y o f Medford' s discharg e consistently compl y wit h th e wate r qualit y standard s fo

r dissolve d oxygen . N o permi t limit fo r ammoni abase d o

n dissolve d oxyge

n i s necessary . I

n orde r t o determin e i f

apermi t limi t fo r ammoni ai s needed based o n toxicity , amor

e detaile d evaluatio n wa s performed . Accordin g to EPA' s 198 6 Qualit y Criteri afo

r Wate r an d OA R340-41 , Tabl e 20 , toxi c concentration s o f total ammoni aar

e p H an d temperatur

e dependent . Th e p H i

n th e Rogu e Rive

r range s u p to 7.7 5 wit h temperature level s a s hig h a s 20.2° C i n lat e summer . Usin g thes e wors t cas e condition s (and assumin g salmonid s ar

e present) , th e chroni c criteri afo r ammoni aexpresse d a s N i s 1.1 7 mg/ l wit h a n acut e criteri ao f

6.6 1 mg/l . Instrea

mbackground level s of

ammoni aca

n b e a s high a s 0.0

4 mg/l . Usin g aDE Q spreadshee t

progra m(se e Attachmen

t #2) , a n analysi s wa s performed to determin e i f th e discharg e wil l cause , hav e th e reasonabl e potentia l to cause , or

contribut e to an y excursio n abov e stat

e wate r qualit y standar d fo r ammonia . N o evaluatio n o f ammoni awa s performed fo r th e winter

perio d becaus e p H and temperature value s ar e lowe r an d dilutio n i s higher . Twenty-tw o effluen

t ammoni aconcentratio n result s fro mthe treatment

facilit y wer e reviewed . Th e highes t concentratio n foun

d wa s 20, 3 mg/l , Usin g th e CORMI X dilution s withi n th e ZI

D an d mixin g zone , th e spreadsheet

calculate d tha

t there wa s areasonabl e potentia l fo r chroni c toxicit

y due to ammonia . Th e Department propose s summe

r perio d ammoni alimit s b e include d i n th e permit . Usin g th e critica

l cas e river

condition s (liste d above ) and effluen t condition s (7. 4 fo

r p H an d 22°C ) an d dilutio n factors , th e expecte d p H an d temperatur

e condition s a

t th e edg e o f

th e mixin g zon e an

d ZID wer e calculate d usin g th e procedure s i n EPA' s DESCON program . A t th e edg e o f

th e ZID , th e calculate d p H and temperature value s ar e 7.4 6 an d 21. 1 respectively . A t

th e edg e o f

th e mixin g zone , th e calculate d p H an d temperature value s ar e 7.6 4 an d 20, 3 respectively . Usin g thes e values , ne w end

of-pip e limit s base d o n th e criteri awer e calculate d (se e Attachment #3) . Th e propose d limit s ar e 1 1 mg/ L monthly averag e an d 2 3 mg/ L daily maximum . Temperatur

e Th e Departmen

t i s proposin g anew exces s therma l loa d limit i n thi s permit . I

t wil l b e base d o

n th e averag e dr y weathe r desig n flow an

d th e differenc e between th e weekly averag e o f th e maximum effluen t temperature s an d th e appropriat e trigger temperature . In thi s case , th e Rogu e Rive r i s water qualit y limite d fo

r salmoni d rearin g durin g the summer . Th e appropriat e trigger temperature fo

r tha t beneficia l us e i s 64°F . Th e propose d exces s therma l loa d limi t wa s calculate d a s follows : 2 0 DADW

F (MGD ) x 8.3 4 #/gallo n x (75. 6 weekl y averag e maximu meffluen t temperature i

n F - 6 4 applicabl e trigger

temperatur

e i n °F) = 1,934.8 8 Millio n BTUs/da y o Th e propose d limit

i s 1,90 0 MBTU . Mixin g Zon e an

d Zon e o f Immediat e Dilutio n Th e Department' s rule s (OAR 340-041-0365(4) ) allo w fo r designatio n o f

aportio n o f

areceivin g strea ma s amixin g zon e servin g a s azone of dilutio n fo

r wastewater s an

d receivin g waters . Th e Departmen

t ma y suspen d all or

par t of th e wate r qualit y standard s withi n amixin g zone . Th e propose d permi t contain s amixin g zon e develope d i n accordanc e wit

h th e rules . Th e allowabl e mixin g zon e i s tha t portio n o f th e Rogu e Rive

r containe d withi n aband extendin g out on e hundre d (100 ) fee

t fro mth e sout h ban k o f th e rive r and extendin g fro

mapoin t te n (10 ) fee

t upstrea mo f th e outfall t o apoin t

thre e hundre d (300 ) fee

t downstrea

mfro mth e outfall . Th e Zon e o f Immediat e Dilutio n (ZID ) shal l b e defined a s tha t portio n o f th e allowabl e mixin g zon e tha t i s withi n thirt y (30 ) fee t o f th e poin t o f discharge .Cit

y o f Medford Evaluatio n Report Pag e 1 5 Th e Department

believe s there will b e n o environmenta l impac t fro msuch amixin g zon e an

d tha t th e defined mixin g zon e meet s the criteri ai n th e rule . Reclaime d Wate

r Outfall 00 2 Th e utilizatio n o f

treate d effluen

t fo r agricultura

l purpose s i s regulate d unde r OA R340-55 . Th e Cit

y ha s propose d facilit

y modification s to produc e u p to 4 MG D of Leve l I V reclaime d water . N o specifie d irrigatio n sit

e o r crop s hav e been proposed . Prio r t o irrigatio n o f

th e reclaime d water , th e Cit y i s require d to submi t

and obtai n approva

l o f a Reclaime d Wate

r Us e Plan . I

n addition , th e discharg e mus t comply wit

h tota l colifor mlimit s base d o n protectio n o f

huma n healt h du e to huma

n pathogens . For

Leve l I V reclaime d water , th e limit s include a weekl y media

n o f 2. 2 tota l colifor mper 10 0 mi s an d n o sampl e shal l excee d 2 3 total colifor mpe r 10 0 mis , Th e applicatio n o f

reclaime d wate

r mus t b e manage d i

n accordanc e wit

h a n approve d Reclaime d Wate r Us e Plan . All reclaime d wate r shal l b e distribute d o

n land , fo r dissipatio n b y evapotranspiratio n and controlle d seepag e b

y followin g sound irrigatio n practice s s o a s to prevent :

• Prolonge d pondin g o f

treate d reclaime d water

o n th e ground surface , • Surfac e runof

f or subsurfac e drainag e throug h drainag e tile . • Th e creatio n o f

odors , fl y an d mosquit o breedin g or

othe r nuisanc e conditions . • Th e overloadin g o f

lan d wit h nutrients , organics , or

othe r pollutant parameters .

. Impairment

of existin g o r

potentia l beneficia l use s of groundwater . Specifi c crops , applicatio n rate s an d buffers wil l b e approve d b y th e Department

withi n th e Reclaime d Wate r Us e Plan . Th e bacteria

l effluen t limitation s ar

e achievabl e throug h proper operatio n an

d maintenance . Emergenc y Overflow s N o waste ma

y b e discharge d fro

mthes e outfall s unles s i t

i s du e t o astor

mevent a s allowe d under

OA R 340-41-120(13 ) and (14) . I n th e summer , ra

w sewag e overflow s ar

e prohibite d excep t

durin g astor

m event greater tha n th e one-in-ten-year , 24-hou r duratio n storm . I

n th e winter , overflow s ar

e prohibite d excep t durin g astor

mevent greate r tha n th e one-in-five-year , 24-hou r duratio n storm . Schedul e B - Minimu mMonitorin g an d Reportin g Requirement s I n 1988 , th e Department

develope d amonitorin g matri x fo r commonly monitore d parameters . Propose d monitorin g frequencie s fo r ai l parameter s ar

e based o n thi s matri x and , in som

e cases , ma

y hav e change d fro

mth e current

permit , Th e propose d monitorin g frequencie s fo r al l parameter s correspon d to thos e o f

facilitie s o f

simila r siz e and complexit

y i n th e state . Th e permitte e i s require d t o hav e alaborator y Qualit y Assurance/Qualit

y Contro l program . Th e Department

recognize s tha

t som e test s do no t

accuratel y reflec t

th e performanc e o f

atreatment

facilit y du e to qualit

y assurance/qualit

y contro l problems . Thes e test s shoul d no t b e considere d when evaluatin g th e complianc e o f th e facilit y wit h th e permi t

limitations . Thus , th e Department i s als o proposin g to includ e i

n th e openin g paragrap h o f Schedul e B astatement

recognizin g tha

t som e tes t result s ma y b e inaccurate , invalid , d o no t adequatel y represent

th e facility' s performanc e an d shoul d no t b e use d i n calculation s require d b

y th e permit . Monitorin g fo

r E . coli mus t

b e performe d i

n accordanc e wit

h on e of th e method s approve d b

y the Department . Monitorin g fo r tota l colifor mmus t b e performe d when irrigatin g reclaime d water . Tota l chlorin e residua

l an d chlorin e use d mus t

b e monitore d daily usin g a n EP A approve d method . Continuou s monitorin g o f

chlorin e level s fo

r proces s contro l purpose s nee d no t b e reported .Cit

y o f Medford Evaluatio n Report Pag e 1 6 Th e permitte e will b e require d t o monito r influen t flow o n adaily basi s an

d calibrate th e flow meter quarterly . Monitorin g fo

r ammoni aha s been include d durin g th e summe r perio d becaus e ane w ammoni alimit i s propose d i

n Schedul e A . Th e monitorin g frequency i s th e sam e a s th e Carbonaceou s Biochemica l Oxyge n Deman d (CBODs ) monitorin g frequency . Wheneve r on e o r mor e permi t limitation s ar

e base d o n CBOD5 , Department

polic y require s monitorin g fo r ammoni aconcentratio n i

n th e sam e sample . In orde r t o characteriz e th e treatment facility' s contributio n o f

nutrient s to th e receivin g strea mdurin g lo w flow periods , th e propose d permi t include s arequiremen

t t o monitor th e treate d effluen

t fo r certai n nutrients . Weekl

y monitorin g of

Tota l Kjeldah l Nitrogen , nitrat

e plu s nitrite and total phosphoru s i s propose d fo

r th e perio d fro

mJun e 1 throug h Octobe

r 3 1 each year . Temperatur

e monitorin g o f

th e effluen

t and Rogu e Rive

r i s require d i n accordanc e wit h th e Temperatur

e Managemen

t Pla n (TMP) . I

n addition , th e permitte e wil l b e require d t o calculat e th e weekl y averag e o f

th e maximu

mtemperature s of

th e effluen

t and th e therma

l loa d discharged . Th e stream s in thi s basi n ar e wate r qualit y limite d fo

r temperature i

n th e summe

r an d ma y no t full y suppor t th e rearin g o f

salmoni d species , Thi s discharg e ha s areasonabl e potentia l to contribut

e hea t t o th e water qualit y limite d sections . Therefore , the TMP mus t include strea

mmonitorin g fo

r temperature . Th e TM P specifie s th e monitorin g sites , th e qualit y contro l procedure s an

d reportin g requirements . A

n annua l repor t summarizin g th e temperatur e monitorin g i s required . Becaus e thi s facilit

y ha s apretreatment

program , th e propose d permi t include s arequiremen

t t o conduc t quarterly bioassa

y tests usin g thre e species . Bioassa y test s ar e to b e conducte d i

n accordanc e wit h EP A tes t method s an

d procedura

l requirement s a s defined i

n Schedul e D . Th e Department

recognize s tha

t th e bioassa

y tests ar e quit e expensiv e t o conduct . If th e result s o f

th e first year' s bioassa

y tests show tha

t th e effluen

t sample s ar

e no t toxi c at the dilution s determine d t o occur a t th e Zon e o f

Immediat e Dilutio n an

d th e Mixin g Zone , n o furthe r bioassa y testin g wil l b e require d durin g thi s permi t cycle , I n addition , th e permitte e mus t regularly perfor

masca n for priorit y pollutan t

i n th e plant

influen t an d effluent . Certai n specifi c toxi c pollutant s (metal s and cyanide ) mus t b e monitore d mor

e frequently . Volatil e solid s reductio n i n th e biosolid s i s th e proces s used to demonstrat e complianc e wit

h vector attractio n reductio n requirements . Monitorin g o f volatil e solid s reductio n i s propose d i n th e renewa

l permit . Feca

l colifor mtestin g o f

th e biosolid s i s th e proces s use d t o demonstrate complianc e wit h pathoge n reductio n requirements . Monitorin g fo r feca l colifor mcontent i s propose d i

n th e renewa

l permit . Th e propose d permi t

include s monitorin g o f

th e reclaime d water

fo r flow, chlorin e use d and residual , pH , nutrients , turbidit

y an d tota l coliform . Th e monitorin g frequencie s ar e i n accordanc e wit

h Department

rule s an d guidance . A

n annua l repor t describin g th e effectivenes s o f th e reclaime d wate

r syste mi s required . Th e estimate d o

r actua l duratio n an

d volume o f

eac h overflo w fro

mth e emergenc y outfall s mus t b e recorded . Discharg e monitorin g report s mus t b e submitte d t o th e Departmen t monthly b

y th e 15t h da y of the followin g month . Th e monitorin g report s nee d to identif y the principa

l operator s designate d b

y the Cit y t o supervis e th e treatment an d collectio n systems . Th e report s mus t als o include record s concernin g applicatio n o f

biosolid s an

d all applicabl e equipmen

t breakdown s an d bypassing . Schedul e B o f

th e permi t

include s th e requirement

fo r th e submitta

l of annua l reports . Th e condition s ar e standar d languag e requirement s concerning :Cit

y o f Medford Evaluatio n Report Pag e 1 7 Annua l repor t o n inflo w an d infiltratio n remova l Annua l repor t o n land applicatio n of

biosolid s an d landfillin g o f sludg e Annua l repor t o n temperature monitorin g Annua l repor t o n th e us e of

reclaime d wate

r Schedul e C - Complianc e Condition s Th e propose d permi t

include s 5 complianc e condition s wit h complianc e deadlines . Th e requirement s include : Schedul e C o f

th e Permi t

include s acomplianc e conditio n requirin g submitta l apropose d progra

man d time schedul e fo

r identifying an

d reducin g inflow . Thi s progra mi s require d becaus e th e winter perio d BOD 5 and TS S mas s limit s are base d o n averag e we t

weather flow. Th e secon d conditio n require s th e permitte e to submi t t o th e Departmen

t arepor t concernin g ra

w sewag e overflows . Th e thir d conditio n require s submitta l o f a n approvabl e pla

n an d schedul e fo

r comin g int

o complianc e wit h th e temperature waste loa d allocatio n b

y no later tha n on e yea r afte r issuanc e o f

th e Rogu e Rive

r Tota l MaximumDail y Loa

d (TMDL) o

r wit h th e nex t permi t renewa l applicatio n (whicheve

r i s later) . Th e pla n mus t als o evaluat

e th e potentia

l fo r impact s o n th e biologica l integrit y o f Threatene d and Endangere d Specie s tha

t ma y b e present

durin g th e discharg e period . Th e fourt h conditio n require s submitta l o f arepor t whic h assesse s potentia

l interna l and externa

l temperatur

e management

practice s fo

r th e facilit y b y December

31,2003 . Th e fifth conditio n require s submitta l o f areclaime d water

us e pla n a t leas t ninet y (90 ) day s prio r

t o irrigatio n o f

an y reclaime d water . Th e final conditio n state s tha t th e permitte e i s expecte d t o mee t th e complianc e date s establishe d i n thi s schedul e or

notif y th e Department

withi n 1 4 day s followin g an y lapsed complianc e date . Schedul e D - Specia l Condition s Th e propose d permi t

include s 1 1 specia

l conditions . Th e requirement s include : Th e permitte e mus t

hav e th e facilitie s supervise d b y personne l certifie d b

y th e Department

i n th e operatio n o f

treatmen t and/o r collectio n systems . Schedul e D o f

thi s permi t

include s aconditio n specifyin g th e necessar y procedure s fo

r conductin g whol e effluen

t toxicit y testing. Department

polic y require s tha

t all facilitie s o f

thi s siz e and complexit y an d wit h industria

l pretreatmen t

program s mus t

regularly perfor

mapriorit

y pollutant

scan . Schedul e D o f

thi s permi t include s aconditio n requirin g suc h submitta l an d specifyin g th e necessai y procedures . Schedul e D include s aconditio n requirin g th e development and implementatio n o f

acontingenc y pla

n fo r th e preventio n and handlin g o f spill s and unplanne d discharges .Cit

y o f Medford Evaluatio n Report Pag e 1 8 Schedul e D o f

thi s permi t

include s condition s requirin g th e permitte e t o manag e th e land applicatio n o f biosolid s i n accordanc e wit

h th e approve d biosolid s managemen t plan . Disposa

l o f wast e sludg e i n a landfil l i n accordanc e wit

h soli d waste rule s i s als o allowed . The propose d permi t

include s aconditio n i

n Schedul e D tha

t prohibit s an

y advers e impac t

o n groundwate

r quality . Schedul e D include s aconditio n requirin g th e permitte e t o compl y wit h th e rule s concernin g th e us e o f reclaime d wate

r an d th e Reclaime d Wate

r Us e Pla n approve d b

y th e Department . A conditio n i s include d in Schedul e D tha t require s th e permitte e t o kee p acove r crop o n th e irrigatio n sit e a t all time s unles s otherwis e approve d b y th e Department

i n th e Reclaime d Wate

r Us e Plan . Th e Department

ha s include d alimi t

o n exces s therma

l loa d i n Schedul e A tha

t identifie s th e currentl y permitte d amount

of therma l energ y ove

r an d abov e th e trigger

temperature tha

t ma y b e discharged . Th e Department

i s proposin g to include aprohibitio n agains t increasin g therma

l discharge s beyond th e currently permitte d amount . Tha t prohibitio n ca

n b e foun d in Schedul e D . A Temperatur

e Managemen

t Pla n ha s been submitte d b

y th e permitte e an

d i s approve d b

y th e Department

throug h thi s permi t

action . Schedul e D include s apermi t conditio n requirin g th e permitte e to implemen

t th e provision s of

th e approve d Temperatur

e Managemen

t Plan . Schedul e E - Pretreatmen tProgra m The propose d permi t

include s aSchedul e E tha t require s implementatio n o f th e industria

l pretreatmen t program . Schedul e F - NPDE S General Condition s Al l NPDE S permit s issue d i n th e stat e of Orego n contai n certai n condition s tha t remai n th e sam

e regardles s o f

th e typ e of

discharg e an

d th e activit

y causin g th e discharge . Thes e condition s ar e calle d Genera l Conditions . Thes e condition s ca n b e change d o

r modified only o

n astatewide basis . ATTACHMENT S 1 ) Locatio n Ma

p 2 ) Reasonabl e Potentia l Analysi s Spreadsheet 3 ) Calculatio n o f

Permi t Limit s 4 ) Antidegradatio n Revie w Shee t 5 ) DE Q Biologis t

Mem o Update d 11/06/0 2 mehP N»jj p

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### Attachmen t 4



## Appendi x B ; Antidegradatio n Revie w Shee t

ANTIDEGRADATIO N REVIE W SHEE T FO R A PROPOSE D INDIVIDUAL NPDE S DISCHARG E 1 . Wha t i s th e nam

e o f Surfac e Wate

r tha t receive s th e discharge ? Rogu e Rive r Briefl y describ e th e propose d activity : Wastewate r Treatmen t I s thi s revie w fo

r arenewa

l O R new (circl e one ) permi t application ? G o t o Ste p 2 . 2 . I s thi s surfac e wate

r a n Outstandin g Resourc e Wate r o r upstrea mfro

ma n Outstandin g Resourc e Water ? Yes . G

o t o Ste p 5 . No . G

o t o Ste p 3 . 3 . I s thi s surfac e wate

r aHig h Quality Water ? Yes . G

o t o Ste p 8 . No . G

o to Ste p 4 ; 4 . I s thi s surfac e wate

r aWate r Quality Limite d Water ? Yes . G

o t o Ste p 13. ; No . Go to Ste

p 2 . Note ; Th e surfac e wate r mus t fal l int o on e of thre e (3 ) categories : Outstandin g Resourc e Wate r (Ste p 2) , Hig h Qualit y Wate r (Ste p 3) , o r Wate r Qualit y Limited Wate

r (Ste p 4) . 13 . Will th e propose d activit y result i n aLowering o

f Wate r Qualit y i n th e Wate r Quality Limite d Water ? Yes . G

o to Ste p 14 . No . Procee d wit

h Permi t Application . Applican

t shoul d provide basi s fo

r conclusion . G

o t o Ste p 24 . Renewa l permi t include s concentratio n an

d mas s limit s a s allowe d by rul e an d doe s no t include an y mas s loa d increase s subject

t o OA R 340-041-0026(3 )24 . O n th e basi s o f th e Antidegradatio n Review , th e followin g i s recommended : _X

_Procee d wit h Applicatio n t o Interagenc y Coordinatio n an d Publi c Commen t Phase . Den y Application ; retur n t o applican t an d provid e publi c notice . Actio n Approve d Section : Revie w Prepare d By : Mar k E . Hamli n Phone : 503-378-824 0 x 23 9 Dat e Prepared : May 17,200 2

Pleas e provid e th e followin g informatio n an d submi t with th e complete d applicatio n for m to : Departmen t

o f Environmenta l Quality Wate r Qualit y Division—Surfac e Wate r Managemen t 81 1 S W Sixt

h Avenu e Portland , Orego n 97204-139 0 Name : Nam e o f Company : Address :

Phone : Fax :

# nfh-c k m &v\i ~ii Stat e o f Orego n 

# Department

o f Environmenta

l Qualit y Memorandum

Date : 1 2 Jun e 200 2 To : Mar

k Hamlin From : Rick

Hafele Subject : Winte

r temperatur

e effects o n aquati c invertebrate s A questio n ha s been raise d abou t ho w asligh

t increas e in wate

r temperatur

e (u p t o 1,5°F ) during th e winte r months , whe

n strea mtemperature s ar

e naturally col d (belo w 50°F) , migh t impact th e biologica l integrit y of aquati c invertebrate s an

d thu s foo d fo r liste d juvenil e salmon in th e Rogue River . Wate r temperatur

e i s well known to influenc e man y facets o f aquati c invertebrat

e biolog y (Merrit t an d Cummin s 1996) , Temperatur e ca n directly influenc e metabolism , growth , emergenc e an

d reproduction . I

t ha s als o bee

n observe d tha

t strea minvertebrate s tolerat

e cold temperature s better

tha n war mtemperature s (War

d 1992) . Man

y specie s surviv e and gro w a t nea r freezin g temperatures , bu

t fe w specie s ca

n tolerate war

mtemperature s (>30°C) . Curren t modelin g indicate s tha

t discharge s fro

mMedford' s sewag e treatmen t facilit y wil l increas e winte

r temperature s i

n th e Rogue Rive

r b y approximatel

y 1.5° F whe n th e rive r i s a t it s coldes t winte r temperature s (nea

r 40°F ) an d lowes t discharge . Will thi s chang e i n temperatur e impact the biologica

l integrit y of th e aquati c invertebrate s i

n th e affecte

d segmen t o f th e Rogue River ? While change s in temperature , eve n smal l ones , ca n hav e subtl e effects o

n strea minvertebrate s by slightly alterin g growt

h rate s an d metabolism , aquati c invertebrate s hav e evolve d to surviv e unde r variabl e natura

l conditions . A

n increas e o f

one t o on e an d ahalf degree s durin g minimu

m winte r temperature s woul d b e well within th e natura l variatio n o

f winte r temperatures . I

n additio n I d

o no t believ e subtl e change s in growth , i f an y occur , coul d b e measured by an y o f th e curren t sampling technique s which loo k a t specie s diversit

y an d relativ e abundance . Biologica l integrit y a s currently assesse d i s base d on th e specie s compositio n (diversit y an d relativ e abundance ) o f

th e invertebrat

e assemblage . Therefore , I d o not believ e thi s sligh

t increas e in winte r temperature s woul d alte

r th e biologica

l integrit y o f th e invertebrat

e communit

y or impac t th e foo d bas e fo r salmonids . Merritt , R . W . an

d K . W . Cummins . 1996 , A n Introductio n t

o th e Aquati c Insect s o

f Nort h America . 3 r d

### Edition . Kendall/Hun t Publishing , Dubuque , Iowa . 86 2 pp . Ward , J . V . 1992 . Aquati c Insect Ecology . 1 . Biolog y an

d Habitat . J . Wile

y & Sons , Inc . NY . 43 8 pp .