# ADMINISTRATIV E RECOR D 

# FIL E PLA N

UNITE D STATE S ENVIRONMENTA L

PROTECTIO N REGIO N VIII I N TH E MATTER

- OF : * • CALIFORNI A GULCH SUPERFUN D SITE , ASARC O INCORPORATED ,

. .-.-.,•

. . .. . RESPONDENT ; •

- >. - • - •

. . - • : : PROCEEDIN G UNDE R SECTIO N 106(a ) O F TH E COMPREHENSIV

E ENVIRONMENTA L

RESPONSE , COMPENSATION

, AN D LIABILIT Y ACT , A S AMENDED , 4 2 U.S.C

. § 9606(a ) PECTIO N AGENJZ

Y ^ ?j>ri.isf •

. " ——— » H.ii i iiimiiiiFiJam , 9 \
E P A Docke t No.

. . 'CERCLA-VIII-91

-

J <

ADMINISTRATIV

E ORDE R FO R CERTAI N REMEDIA L INVESTIGATIO N

STUDIE S TABL E OF CONTENT S I

.' INTRODUCTION

...................................... . 4 I I

. JURISDICTIO N

...................................... . 4 III

. PARTIE S BOUN D

...................................... . 4 I V

. DEFINITION S

....................................... . 4 V

. GENERA

L PROVISION

S

................................ . 5 V I

. FINDING

S O F FAC T

.................................. . 6 VII

. CONCLUSION

S O F LAW AN D DETERMINATION

S

............. .

7 VIII

. NOTIC E T O STAT E

................................... . 8 I.

. PERFORMANC E

O F WOR K

............................... . 8

. . MODIFICATIO N O F WOR K PLAN

S

........................ . 9X I

. QUALIT Y ASSURANCE ,

SAMPLING ,

DAT A ANALYSIS , AN D AVAILABILIT Y

.................................. . XII

. XIII

. XIV

. X V

. . - XVI

. XVII.

- XVIII , XIX

. X X

. XXI

. XXII

. XXIII

. XXIV

. XXV

. XXVI

. XXVII

. XXVIII

. XXIX

. XXX

. XXXI

. Appendi x A

. Exhibit 1

. .................................... . 9 ACCES S

............................................ . 1 1 PUBLI C COMMENT

, ADMINISTRATIV

E RECORD.............

.

1 2 REPORTIN G REQUIREMENT

S

............................ . 1 3 SUBMISSION

S REQUIRIN G AGENC

Y APPROVA L

............. .

1 3 REMEDIA L PROJEC T MANAGER.'."

.

...... . . . 1

. ^

........... .

/ :' 1 4

- ASSURANC E O F ABILIT Y T O COMPLET E WORK

............. .

1 5 'CERTIFICATION

. OF COMPLETION, ^

TERMINATIO N

.......... .

1 6 EMERGENC Y RESPONSE

................................ . 1 6 INSURANC E

AN D INDEMNIFICATIO N

...................... .

1 7 DELA Y I N PERFORMANC E

.............................. . 1 8 UNITE D STATE S

NO T LIABL E

.......................... . 1 9 ENFORCEMEN T AN D RESERVATION

S

...................... .

1 9 ACCES S T O INFORMATIO

N

............................. . 20

. RETENTIO

N O F RECORD S

.............................. . 2 1 EFFECTIV E DAT E

.................................... . 2 1 COMMUNIT

Y RELATION

S

.........'...................... . 2 1 MODIFICATION

...................................... . 2 1 OPPORTUNIT

Y T O CONFE R

............................. . 2 2 NOTIC E O F INTEN T T O COMPL Y

........................ . 2 2 ORDE R

............................................. . 2 3 Change s t o Exhibit s 2, 4 , 5 , an d 6

. Demographic s Wor k Plan

. Exhibit 2

. Fina l

Samplin g Pla n fo r Samplin g an d Analysi s o f Lea d Occurrenc e Withi n an d Immediatel y Adjacen t t o Residences

.Exhibi t

3

. Exhibi t 4

. Exhibi t 5

. Exhibi t 6

. Soi l

Investigatio n

Wor k Plan

. Min e Waste Pile Remedia l Investigatio n

Wor k Plan

. Tailin g Disposa l Are a Remedia l Investigatio n

Wor k Plan

. Surfac e Water , Be d Materia l an d Aquati c Ecosyste m Dat a Collectio n Progra m Wor k Plan

.I

. INTRODUCTIO N 1

. Thi s Administrativ e

Orde r direct s Responden t t o perfor m certai n studie s towar d th e eventua l completio n o f a Remedia l Investigation/Feasibilit

y Stud y ("RI/FS"

) i n connectio n wit h th e Californi a Gulc h Superfun d Sit e nea r Leadville , Lak e County , Colorado

. I I

.

JURISDICTIO N

.,. . 2.

_ .Thi s .Order i s issue d unde r th e authorit y veste d i n th e Presiden t o f th e Unite d States'b y sectio n i06(ai ) o f th e' -• • - • • Comprehensiv e Environmenta l

Response , Compensation ,

an d Liabilit y
, : Act , 42.U.S.C,

. § 9606(a) , a s amende d b y th e Superfun d Amendment

s a n d Reauthorizatio n

Ac t o'f'1'986 , Pub"

. L

. No'. 99-499 ,

10 0 Stat

. ''•'- • -161 3 (1986 3 (CERCLA.) , .Thi s authorit y wa s delegate d t o th e Administrato r o f EP A o n Januar y 23 , 1987 , b y Executiv e Order'' - 12,580 , 5 2 Fed

. Reg

. 2,92 6 (1987) , an d furthe r delegate d t o Regiona l Administrator s

o n Septembe r 13 , 1987, b y EP A Delegatio n N o

. 14-14-C

. Thi s authorit y ha s been furthe r delegate d t o th e Directo r o f th e Hazardou s Wast e Managemen t

Division

. III

. PARTIE S BOUN D 3

. Thi s Orde r shal l appl y t o an d b e binding upo n Respondent , it s agents , successors ,

an d assigns

. Responden t

i s responsible , fo r carryin g ou t al l action s require d o f i t b y thi s Order

. N o chang e i n th e ownershi p or corporat

e o r othe r lega l statu s o f Responden t o r o f th e facility o r sit e shal l alte r Respondent' s responsibilitie s

unde r thi s Order

. 4

. Durin g th e perio d in whic h thi s Orde r i s in effect , Responden t shal l provid e a copy o f thi s Orde r t o any subsequen t owner s o r successor s befor e propert y rights , stock , o r asset s ar e transferred

. Responden t

shal l provid e a cop y o f thi s Orde r t o a l l contractors ,

subcontractors ,

-laboratories ,

an d consultant s retaine d t o conduc t an y wor k performe d unde r thi s Order , withi n 1 4 day s afte r th e effectiv e dat e o f thi s Orde r o r a t leas t 7 day s befor e retainin g thei r services , whicheve r is later

. Responden t shal l conditio n any suc h contract s upo n satisfactor y

complianc e wit h thi s Order

. Notwithstandin g

th e terms o f any contract , Responden t is responsibl e fo r complianc e wit h thi s Orde r an d fo r ensurin g tha t it s employees , contractors ,

consultants , subcontractors ,

agents , an d attorney s compl y wit h thi s Order

. I V

. DEFINITION

S Unles s otherwis e expressl y provide d herein , terms used i n this Orde r whic h ar e define d i n CERCL A o r i n regulation s promulgate d unde r CERCL A shal l hav e th e meanin g assigne d t o the mi n

CERCL A o r suc h regulations

.

Fo r purpose s o f thi s Order , th e followin g terms shal l have th e meaning s se t fort h below : 5

. "Contractor "

means an y person , includin g th e contractors , subcontractors ,

o r agents , retaine d o r hire d b y Responden t t o undertak e an y wor k unde r thi s Order

. 6

. "Day " mean s calenda r day , unles s otherwis e specified

. 7

. "Deliverable "

means an y writte n product, including , bu t n o t limite d to , technica l reports , dat a reports , technica l memoranda , an d othe r document s describin g th e wor k performe d o r t o be performed , require d t o be submitte d unde r th e terms o f this Orde r o r th e accompanyin

g workplans

. 8

. "NCP " mean s th e Nationa l Oil an d Hazardou s' Substance s

<> • Pollution-Contingenc y

.Pla n .promulgated..unde r

Sectio n 10 5 o f CERCLA , 4 2 U.S.C

. § 9605 , codifie d a t 4 0 clF.R l 'Par t 300 ,' • including , bu t no t limite d to , an y amendment s thereto

. 9

. "Order " means thi s Order , attachment s t o thi s Order , a n d al l document s whic h ar e incorporate d

int o thi s Orde r accordin g t o th e procedure s se t forth herein

. 1 0

. "Site " mean s th e Californi a Gulc h Superfun d Site , includin g th e area l exten t o f contaminatio n

an d al l suitabl e areas i n ver y clos e proximit y t o th e contaminatio n

necessar y fo r implementatio n

o f th e respons e action

. 1 1

. "Work " mean s al l task s require d b y this Order , includin g al l activitie s relate d t o th e performanc e

o f suc h activities

. 1 2

. "Wor k plan " means on e o f th e wor k plan s affixe d heret o as Exhibit s 1 throug h 6 , including change s as outline d in Appendi x A

. "Work plan " als o include s any sampling an d analysi s pla n prepare d unde r thi s Order , an d an y othe r plan s o r modification s t o an y suc h wor k o r samplin g an d analysi s pla n approve d b y EP A pursuan t t o this Order

. 1 3

. Al l othe r terms no t otherwis e define d herein , shal l have thei r ordinar y meanin g unles s define d i n CERCL A o r th e NCP , in which case th e CERCL A o r NC P definitio n shal l control

. V

. GENERA L PROVISION S 1 4

. EPA' s objectiv e i n issuin g thi s Orde r i s t o requir e th e performanc e o f certain R I studie s in accordanc e wit h CERCL A an d t h e NC P t o asses s sit e conditions

. 1 5

. Th e activitie s conducte d unde r this Orde r ar e subj.ec t t o approva l b y EP A an d must be sufficien t t o provid e al l

### necessary

informatio n fo r th e R I wor k t o b e performe d unde r thi s Order , an d fo r a recor d o f .decisio n tha t i s consisten t wit h CERCL A an d th e NCP

. Th e activitie s conducte d unde r thi s Orde r shal l b e conducte d i n complianc e wit h CERCLA , th e NCP , an d al l applicabl e EP A guidance , policies , an d procedures

. V I

. FINDING S O F FAC T 1 6

. Th e Sit e i s liste d o n th e Nationa l Prioritie s Lis t an d i s locate d nea r Leadville , Colorado

. 17.

. ASARC O Incorporate d ("ASARCO"

) i s a Ne w Jerse y corporatio n wit h it s corporat e headquarter s

i n th e State o f Ne w York

. Responden t

own s o r operate s o r ha s owned o r operate d portion s of„th e Site

.

. 18..

. .Th e Site_discharge s

or . ha s th e potentia l t o discharg e variou s metals , includin g arsenic , cadmium , copper,

- lea d and'zinc

- a s follows : Soi l resource s o f residential

, commercial

, industrial , a n d undevelope d land s withi n th e Sit e hav e been an d continu e t o be subjec t t o impac t b y minin g an d relate d activities

. Smelte r slag , tailing s piles , an d wast e roc k pile s containin g hig h level s o f metal s ar e foun d throughou t th e Site

. Metal s migratio n ca n occu r fro m thes e source s t o nearb y surfac e an d vados e soil s b y win d dispersion , precipitatio n

an d surfac e wate r runoff , an d reworkin g o f thes e surfac e sources . Mi'1 1 "•tailings'''ar e

'th e rock debri s remainin g afte r millin g an d separatio n has remove d th e meta l as concentrate s fro m th e ore . Tailing s ar e generall y fine-grained , silt-size d particles

. Man y pile s an d pond s (wher e wate r is decante d fro m th e tailings) , ar e locate d o n th e Site

. Thes e tailing s pile s an d pond s ar e a potentia l sourc e o f metal s contaminatio n

a s show n i n previou s studies

. Min e wast e roc k consist s o f min e developmen t roc k an d lo w grad e or e take n fro m belo w groun d an d deposite d near adi t o r shaf t openings

. Many o f th e mine wast e roc k pile s contai n hig h concentration s

o f arsenic , cadmium , copper , lead , nickel , an d zinc , which ma y b e leache d fro m th e minin g wast e durin g time s o f rain o r snowfall

. Ther e ar e hundred s o f wast e roc k pile s o n t h e Site

. Surfac e wate r act s a s th e primar y transpor t mechanis m f o r bot h solubl e metal s an d metal-lade n sediments

. Th e Sit e i s draine d b y severa l gulche s tributar y t o th e Arkansa s River , including : Evans , California , Iowa ,a n d

Empir e gulches

. Thes e gulche s flo w mostl y i n respons e t o precipitatio n

event s an d snowmelt

. Th e intermitten t flo w o f surfac e wate r over , through , an d around minin g wast e roc k an d tailing s piles , int o th e gulches , an d ultimatel y int o th e Arkansa s Rive r i s a potentia l sourc e o f metal s contamination

. Groundwate r act s a s a transpor t mechanis m fo r solubl e metals

. Groundwate r

i s foun d in bot h bedrock an d alluvia l system s a t Californi a Gulch , an d recharg e is principall y fro m infiltratio n

o f precipitatio n

an d surfac e wate r .drainage

. Groundwate r

in uppe r Californi a Gulch , occur s primaril y i n th e bedrock formation s includin g granite , limestone , porphyry , an d sandstones

. ,Grpundwate r

i n th e bedroc k syste m east an d southeas t o f Leadvill e discharge s directl y 'to * • --California

.

Gulc h surfac e water, , int o th e min e working s a n d th e Ya k Tunnel , o r int o downgradien t

grouhdwate r systems

. I n lowe r Californi a Gulch , groundwate r

flow s throug h hig h terrac e gravels , lak e be d sediments , o r bedroc k units

. Muc h o f th e groundwate r

i n th e are a eventuall y reache s Californi a Gulc h an d Arkansa s Rive r surfac e wate r o r associate d alluvia l groundwate r systems

. Strea m sediment s ma y b e affecte d b y migration , alteration , absorption ,

an d precipitatio n

o f contaminant s fro m source s upstream

. A i r is affecte d b y fugitiv e dus t generate d b y wind erosion , eart h movemen t durin g construction ,

off-roa d vehicles , an d vehicula r traffi c o n dir t an d grave l roads

. Significan t

pathway s exis t fo r ingestion , inhalation , an d contaminatio n

of

. indoo r environment

s wit h hazardou s element s foun d i n mining , processing , an d smeltin g waste s a t th e Site

. Flor a an d faun a ma y be threatene d b y metal s contaminatio n o f th e environment

.

Syste m studie s confir m th e presenc e o f metal s i n soils , sediments , an d surfac e water

. Thes e metal s affec t vegetation , livestock , wildlife , an d macroinvertebrates

. 1 9

. Arsenic , cadmium , copper , lead , an d zin c ar e "hazardou s substances " pursuan t t o sectio n 101(14 ) o f CERCLA , 4 2 U.S.C

. § 9601

. VII

.

CONCLUSION

S OF LA W AN D DETERMINATION

S 2 0

. Th e sit e i s a "facility " a s define d i n sectio n 101(9 ) o f CERCLA , 4 2 U.S.C

. § 9601(9)

.2 1

.

Variou s metal s foun d a t th e Sit e ar e "hazardou s substances " a s define d i n sectio n 101(14 ) o f CERCLA , 4 2 U.S.C

. § 9601(14) , o r constitut e "an y pollutan t o r contaminant "

tha t may presen t a n imminen t an d substantia l dange r t o publi c healt h o r welfar e unde r sectio n 104(a)(l ) o f CERCLA , 4 2 U.S.C

. § 9604(a)

. 2 2

. Th e past, present , o r potentia l futur e migratio n o f hazardou s substance s describe d i n sectio n V I o f thi s Orde r constitute s a n actua l and/o r threatene d "release " as define d in sectio n 101(22 ) o f CERCLA , 4 2 U.S.C

. § 9601(22)

. -23

. Responden t i s a perso n a s define d i n sectio n 101(21 ) o f CERCLA , 4 2 U.S.C

. § 9601(21)

.



### - - - v - 24.

. /Responden t i s a responsibl e party , unde r section s J.04 , 107 , an d 12 2 o f CERCLA , 4 2 U.S.C

. §§9604 , 9607 , an d 122

.' 25

. Th e action s require d b y this Orde r ar e necessar y t o protec t th e publi c healt h o r welfar e o r th e environmen t

an d are consisten t wit h CERCLA an d th e NCP

. VIII

. NOTIC E TO STAT E 2 6

. B y providing a-cop y o f thi s Orde r t o th e Stat e o f Colorado , EPA.ha s notifie d th e stat e tha t thi s Orde r i s bein g issue d an d tha t EP A i s th e lea d agency fo r coordinating , overseeing , an d enforcing th e respons e actio n require d b y thi s Order

. EP A wil l provid e fo r stat e involvemen t

wit h developmen t o f th e R I studie s i n accordanc e wit h sectio n 121(f ) o f CERCLA , 4 2 U.S.C

. § 9621( f )

. 27

. An y document , notice , material , o r deliverable ,

which Responden t i s require d unde r thi s Orde r t o submi t t o EPA , shal l als o b e submitte d b y Responden t t o th e State

. 28

. Th e State an d it s authorize d

representative s

shal l b e provide d th e sam e right s o f access t o area s t o which thi s Orde r applie s a s i s provide d fo r EP A i n Sectio n XII

. I X

. PERFORMANC

E O F WORK 2 9

. Al l Wor k performe d unde r thi s Orde r shal l b e unde r th e directio n an d supervisio n o f qualifie d personnel

.

Withi n 3 0 day s o f th e effectiv e dat e o f this Order , an d befor e th e Wor k begins , Responden t shal l notif y EP A i n writin g o f th e names , titles , an d qualification s

o f th e personnel , includin g contractors , subcontractors ,

consultants ,

an d laboratories ,

t o b e use d i n carryin g ou t suc h Work

. Th e qualification s

o f th e person s undertakin g th e Work fo r Responden t shal l b e subjec t t o EPA' s revie w fo r verificatio n tha t suc h person s mee t minimu m technica l 

### backgroun d an d experienc e requirements

.

I f EP A disapprove s i n writin g o f an y person(s) 1 technica l qualifications ,

Responden t 8shal

l notif y EP A o f th e identit y an d qualification s

o f th e replacement(s)

withi n 7 day s o f th e writte n notice

. I f EP A subsequentl y disapprove s

o f th e replacements) ,

EP A reserves th e righ t t o terminat e thi s Order , conduc t th e Work , an d see k reimbursemen t

fo r cost s an d penaltie s fro m Respondent

. Durin g t h e cours e o f th e Work , Responden t shal l notif y EP A i n writin g 7 day s i n advanc e o f an y change s o r addition s i n th e personne l use d t o carr y ou t suc h Work , providing'thei r

names , titles , an d qualifications

.

EP A shal l have th e sam e righ t t o approv e change s an d addition s t o personne l a s i t ha s hereunde r regardin g th e initia l notification

. 30

. Responden t

shal l conduc t activitie s an d submi t deliverable s a s provide d b y thi s Orde r an d th e attache d exhibits , which " ar e 'incorporate d

b y reference

. * ; All-.Wor k performe d -i s .t o be , conducte d i n accordanc e wit h th e schedules , standards , specifications ,

an d othe r requirement

s o f this Order , - an d th e attache d wor k plans , a s initiall y approve d o r modifie d b y EPA , and a s ma y b e amende d or modifie d b y EP A fro m tim e t o time

. 3 1

. Responden t shall , prio r t o an y off-sit e shipmen t o f hazardou s substance s fro m th e site , provid e writte n notificatio n t o th e appropriat e stat e environmenta l

"officia l i n th e receivin g stat e an d to EPA' s Designate d Remedia l Projec t Manage r (RPM ) o f suc h shipmen t o f hazardou s substances

. ( a ) Th e notification'referre d

t o above shal l b e i n writing , a n d shal l includ e th e followin g information :

( 1.) th e nam e an d locatio n o f th e facilit y t o whic h th e hazardou s substance s ar e t o b e shipped ; (2 ) th e typ e an d quantit y o f th e hazardou s substance s t o b e shipped; (3 ) th e expecte d schedul e fo r th e shipmen t o f th e hazardou s substances ;

an d (4 ) th e metho d o f transportation

. Responden t shal l notif y th e receivin g stat e o f majo r change s i n th e shipmen t plan , suc h a s a decisio n t o shi p th e hazardou s substance s t o anothe r facilit y withi n th e sam e state , o r t o a facility i n anothe r state

. ( b ) Th e identit y o f th e receivin g facility wil l b e determine d b y Responden t followin g th e award o f th e contrac t o r contract s fo r th e Work

. Responden t

shal l provid e al l relevan t information , includin g informatio n

unde r th e categorie s note d i n paragrap h (a ) above , o n th e off-sit e shipments , a s soon a s 

### practica l afte r th e awar d o f th e contrac t an d befor e th e hazardou s substance s ar e actuall y shipped

. 32

. Al l activitie s undertake n b y Responden t shal l b e i n complianc e wit h al l Federal , Stat e an d loca l law s an d regulations , includin g permit requirements ,

unles s a n exemptio n i s provide d by sectio n 121(e ) o f CERCLA , 4 2 U.S.C

. § 9621(e)

. Responden t shal l identif y an d obtain al l permits , licenses , an d approval s require d fo r performanc e o f Wor k i n sufficien t tim e t o perfor m Wor k a s scheduled

.33

.

Th e Exhibit s identif y deliverable s

t o b e produce d unde r t h e terms o f this Orde r alon g wit h du e date s fo r thos e 

### deliverables

. Task s referre d t o ar e thos e se t fort h in this Orde r an d th e Exhibits

. X

. MODIFICATION

O F WORK PLAN S 3 4

. I f a t any tim e durin g performanc e

o f th e Wor k a s require d herein , Responden t identifie s a need fo r additiona l data , a memorandu m documentin g th e nee d fo r additiona l dat a shal l be submitte d t o th e designate d RP M withi n 7 day s o f suc h identification

.

EP A in it s discretio n wil l determin e whethe r th e additiona l dat a wil l be collecte d b y Responden t an d whethe r i t 

### .will--b e -incorporated

, int o report s an d deliverables

. 35

. I n th e even t o f condition s posin g a n immediat e threa t t o huma n healt h o r welfar e o r th e environment

, Responden t shal l notif y th e RP M an d th e stat e immediately

.

I n th e event o f unanticipated.o r

change d circumstance s

a t th e site , Responden t shal l notif y th e RP M b y telephon e withi n 2 4 hours o f discovery o f t h e unanticipate d

o r change d circumstances

.

I n additio n t o th e authoritie s in th e NCP , in th e even t tha t EP A determine s tha t th e immediat e threa t o r th e unanticipate d

o r change d circumstance s warran t change s in an y wor k plan , EP A shal l modif y o r amend suc h wor k pla n i n writin g accordingly

.

Responden t

shal l perfor m th e' wor k pla n as modifie d o r amended

. 36

. EP A ma y determin e tha t i n additio n t o task s define d i n an y initiall y approve d wor k plan , othe r wor k ma y be necessar y t o accomplis h th e objective s o f th e Work

. EP A may requir e tha t Responden t perfor m 'thes e respons e action s i n additio n t o thos e require d b y an y initiall y approve d wor k plan , includin g an y approve d modifications ,

i f it determine s tha t suc h action s ar e necessary t o adequatel y complet e th e Work

. Responden t

shal l confir m it s willingnes s

t o perfor m th e additiona l wor k i n writin g t o EP A withi n 7 day s o f receip t o f th e EP A request

. Responden t shal l implemen t th e additiona l task s which EP A determine s ar e necessary . Th e additiona l wor k shal l b e complete d accordin g t o th e standards , specifications ,

an d schedul e se t fort h o r approve d b y EP A i n a writte n modificatio n

t o an y wor k pla n o r writte n supplement s thereto

. EP A reserves th e righ t t o conduc t th e Wor k itsel f a t an y point , t o see k reimbursemen t

fro m Respondent , and/o r t o see k any othe r appropriate relief

. X I

. QUALIT Y ASSURANCE ,

SAMPLING

, DAT A ANALYSIS , AN D AVAILABILIT

Y 3 7

. Responden t

shal l assur e tha t wor k performed, sample s taken , an d analyse s conducte d confor m t o th e requirement

s o f th e wor k plan s an d guidanc e identifie d therein

. 1 03 8

.

I n th e event tha t th e Responden t fail s t o us e th e QA/Q C practice s an d procedure s a s outline d in th e wor k plan s approve d hereunder , EP A reserve s th e righ t t o conduc t al l Wor k identifie d herein , including a complet e RI/F S o r an y portio n thereo f pursuan t t o it s authorit y unde r CERCLA , t o see k reimbursemen t fro m Respondent , and/o r t o see k an y othe r appropriate relief

. 3 9

. Al l result s o f sampling , tests , modeling , o r othe r dat a (includin g ra w chemica l analytica l data ) generate d b y Respondent, o r o n Respondent' s behalf , durin g implementatio n

o f thi s Order , shal l be submitte d t o EP A in a n electroni c fil e forma t usin g th e . E P A contrac t laborator y progra m (CLP ) forma t A (a s describe d i n Exhibi t H o f th e EP A CL P Statemen t o f Wor k fo r Inorgani c 

### Analysis , Multi-media ,

Multi-concentrate

) o r a n ASCI I fil e

- forma t , • alon g wit h the-monthl y progres s repor t as-describe d

i n >, . : - Sectio n XI V o f this Order

. EP A wil l make availabl e t o th e Responden t validate d dat a generate d b y EP A unles s it i s exemp t fro m disclosur e b y an y federal s o r stat e la w o r regulation

. 4 0

. Responden t

wil l notif y EP A i n writin g a t leas t 1 5 day s prio r t o conductin g significan t fiel d event s a s describe d i n any wor k plan , o r samplin g an d analysi s plan

. A t EPA' s verba l or , writte n request , o r a t th e reques t o f EPA' s oversigh t assistant, Responden t shal l allo w spli t o r duplicat e sample s t o b e take n b y E P A (and/o r it s authorize d

representatives

) o f an y sample s collecte d b y th e Responden t i n implementing

thi s Order

. 4 1

. I f Responden t object s t o dat a relating t o th e R I Wor k identifie d herein , Responden t shal l submi t t o EP A a repor t tha t identifie s an d explain s it s objections , describe s th e acceptable , use s o f th e data , i f any , an d identifie s any limitation s t o th e us e o f th e data

. Th e repor t mus t b e submitte d t o EP A withi n 1 5 day s o f th e monthl y progres s repor t containin g th e data

. XII

. ACCES S 42

. EP A an d it s authorize d representative s

ma y ente r an d freel y mov e about al l propert y a t th e sit e an d off-sit e areas wher e Work , i f any , i s bein g performed, fo r th e purpose s o f inspectin g conditions ,

activities ,

th e result s o f activities , records , operatin g logs , an d contract s relate d t o th e sit e o r Responden t an d it s contractor(s)

pursuan t t o thi s Order ; reviewin g th e progres s o f Responden t in carryin g ou t th e terms o f thi s Order ; conductin g test s a s EP A o r it s authorize d representative s

dee m necessary ; usin g a camera , soun d recordin g device , o r othe r recordin g equipment ; an d verifyin g th e dat a submitte d t o EP A b y Respondent

. Responden t

shal l allo w thes e person s t o inspec t an d copy al l records , files , photographs , documents , sampling an d monitorin g data , an d othe r writing s relate d t o wor k undertake n in carryin g ou t thi s Order

. Nothin g herei n shal l b e interprete d a s limitin g o r affectin g an y EP A 1 1representative' s

righ t o f entry o r inspectio n authorit y unde r federa l law

. 4 3

. I f fo r prope r performanc e

o f th e Work , i t i s necessary t o ente r propert y owned i n whol e o r i n par t b y partie s othe r tha n thos e bound b y this Order , Responden t wil l obtain , o r us e it s best effort s t o obtain , sit e acces s agreement s fro m th e owne r 3 0 day s prio r t o th e tim e suc h acces s i s needed

. Suc h agreement s shal l provid e access fo r EPA , it s contractor s

an d oversigh t officials , th e State o f Colorad o an d it s contractors ,

an d th e Responden t o r it s authorize d representatives

.

Suc h agreement s shal l specif y tha t Responden t i s no t EPA' s representativ e

wit h respec t t o liabilit y associate d wit h sit e activities

. Copie s o f suc h agreement s shal l b e provide d t o EP A prio r t o Respondent' s -initiatio n oilfiel d activities

.

...... . ^ _,-.• • 44

. I f access agreement s ar e no t obtaine d withi n th e tim e reference d above , Responden t shal l promptl y notif y EP A o f it s failur e t o obtain access . EP A ma y obtain access fo r th e Respondent , perfor m thos e task s o r activitie s wit h EP A contractors , o r terminat e th e Orde r i n th e even t tha t Responden t canno t obtai n access agreements

.

I n th e even t tha t EP A perform s thos e task s o r activitie s wit h EP A contractor s an d doe s no t terminat e th e Order , Responden t shal l perfor m al l othe r activitie s no t requirin g access t o tha t site , an d shal l reimburs e E P A fo r al l cost s incurre d i n performin g suc h activities

. Responden t additionall

y shal l integrat e th e result s o f any suc h task s undertake n b y EP A int o it s report s an d deliverables

. Responden t shal l reimburs e EP A fo r al l cost s an d attorne y fee s incurre d b y th e Unite d State s in obtainin g access fo r th e Respondent

. XIII

. PUBLI C COMMENT , ADMINISTRATIV

E RECOR D 4 5

. EP A retain s th e responsibilit

y fo r th e releas e t o th e publi c o f any report s base d upo n th e Work

. 4 6

. EP A ma y provid e Responden t wit h copie s o f an y repor t base d upo n th e Wor k an d th e fina l RI/F S report

. 4 7

. EPA-wil l determin e th e content s o f th e administrativ e recor d fil e fo r selectio n o f th e remedia l action

. Responden t must submi t t o EP A document s develope d durin g th e cours e o f th e Wor k upo n which selectio n o f th e respons e actio n ma y b e based

. Responden t shal l provid e copie s o f plans , tas k memorand a includin g documentatio n

o f fiel d modifications ,

recommendation s f o r furthe r action , qualit y assuranc e memorand a an d audits , ra w data , field notes , laboratory analytica l reports , an d othe r reports

. Responden t

mus t additionall y submi t an y previou s studie s conducte d unde r state , local , o r othe r federa l authoritie s relatin g t o selectio n o f th e respons e action , an d al l communication s

betwee n Responden t an d state , local , o r othe r 12federa l

authoritie s

concernin g selectio n o f th e respons e action

. A t EPA' s discretion , Responden t

ma y establis h a communit y informatio n repositor y at o r nea r the site , t o hous e on e cop y o f t h e administrativ e

record

. XIV

. REPORTIN G REQUIREMENT

S 48

. Responden t

shal l mak e presentation s

a t an d participat e in meeting s a t th e reques t o f EP A durin g th e initiation ,

conduct , a n d completio n o f th e Work

. I n additio n t o discussio n o f th e technica l aspect s o f th e Work , topic s wil l includ e anticipate d problem s o r ne w issues

. Meeting s wil l b e schedule d a t EPA' s discretion

. 49. " In-addition-to-th e

deliverable s

set .fort h i n thi s . . Order , Responden t shal l provid e t o EP A monthl y progres s report s b y th e 1Ot h da y o f eac h mont h durin g whic h thi s Orde r i s in effect

. A t a minimum , wit h respec t t o th e precedin g month , thes e progres s report s shall : (1) describ e th e action s whic h hav e bee n take n t o compl y wit h this Orde r durin g tha t month ; (2 ) includ e a l l result s o f samplin g an d test s an d al l othe r dat a collecte d o r receive d b y Respondent;

(3 ) describ e wor k planne d fo r th e nex t t w o month s wit h schedule s relating suc h wor k t o th e overal l projec t schedul e fo r completio n o r Work ; an d (4 ) describ e al l problem s encountere d

an d an y anticipate d problems , an y actua l o r anticipate d delays , an d solution s develope d an d implemente d t o addres s an y actua l o r anticipate d problem s o r delays

. X V

. SUBMISSION

S REQUIRIN G AGENCY APPROVA L 50

. EP A reserve s th e righ t t o comment on , modify , an d direc t change s fo r al l deliverables

.

Whe n EP A comment s o n o r direct s change s t o deliverables ,

th e followin g procedure s

shal l apply : a . Responden t

must full y correc t al l deficiencie s

an d incorporat e an d integrat e al l informatio n an d comments, , a s directe d by EPA , withi n seve n (7 ) day s o f receip t o f E P A comments , unles s otherwis e specifie d in an y schedul e i n th e wor k plan s approve d hereunder

. b

. Responden t

ma y request , an d EP A shal l grant , a meetin g t o discus s any comment s o r instruction s

fro m EPA , prio r t o resubmittin

g th e deliverable

.

I f EPA , i n consultatio n wit h th e stat e o f Colorado , agree s tha t it s comment s or instruction s

are incorrec t or shoul d b e modified, Responden t ma y resubmit th e deliverable s

i n 

### accordanc e wit h EPA' s decision

. c . A t th e tim e an y revise d deliverabl e i s submitted , Responden t shal l submi t a cover lette r describin g ho w • eac h substantiv e EP A commen t wa s addressed , and a 13descriptio n o f an y additiona l substantiv e

change s o r addition s i n th e resubmitta l alon g wit h a justificatio n f o r thos e change s o r additions

. Th e cove r lette r shal l als o includ e a certificatio n

tha t n o substantiv e change s othe r tha n thos e identifie d in th e cover lette r wer e made

. Failur e t o addres s EP A comment s o r direction s a s describe d in thi s paragraph , o r failur e t o identif y additiona l substantiv e

change s o r addition s i s a violatio n o f thi s Order

. d

. I f Responden t disagree s wit h th e substantiv e

change s require d b y EPA , Responden t ma y includ e a disclaime r in t h e cover lette r identifyin g th e portion(s ) o f suc h document s wit h whic h th e Responden t disagree s an d th e • - reasons fo r th e .disagreement

.

Wheneve r an d t o whomeve r t h e documen t is disseminated

, EP A wil l include*suc h cover lette r wit h th e deliverable

.

Suc h cove r lette r shal l b e include d i n th e Administrativ e

Recor d fo r th e Sit e a s provide d unde r Sectio n XIII

. 5 1

. I f Responden t fail s t o compl y wit h th e precedin g paragraph , o r i f EP A determine s tha t additiona l change s o r addition s wer e include d in a resubmitta l withou t sufficien t justification ,

EP A retain s th e righ t t o see k statutor y penalties , perfor m it s ow n studies , o r complet e o r modif y th e deliverabl e o r a ny portio n thereo f an d see k reimbursemen t

fro m Responden t fo r it s costs

. T o th e exten t tha t EP A conduct s o r take s ove r som e o f t h e Work , Responden t shal l incorporat

e an d integrat e informatio n supplie d b y EP A int o an y repor t o n suc h Work

. 52

. I n th e even t tha t EP A take s over some o f th e tasks , Responden t shal l incorporat

e an d integrat e informatio n

supplie d 

### b y EP A int o an y report s prepare d b y it

. 5 3

. Neithe r failur e o f EP A t o expressl y approv e o r disapprov e o f Respondent' s

submission s

withi n th e specifie d tim e periods , no r th e absenc e o f comments , shal l b e construe d a s approva l b y EPA

. Whethe r o r no t EP A give s expres s approva l fo r Respondent' s deliverables ,

Responden t

i s responsibl e fo r preparin g deliverable s

acceptabl e t o EPA

. XVI

. REMEDIA L PROJEC T MANAGE R 5 4

. Al l communications ,

whethe r writte n o r oral , fro m Responden t t o EP A shal l b e directe d t o on e o f EPA' s RPMs

. Responden t shal l submi t t o EP A thre e copie s o f all'documents , including plans , reports , an d othe r correspondence ,

which ar e develope d pursuan t t o thi s Order , an d shal l hand delive r o r send thes e document s retur n receip t requested

.
1 4EPA' s

RP M concernin g Exhibit s 1- 5 is : K e n Wangerud , 8HW M E P A Remedia l Projec t Manage r 

### Hazardou s Wast e Managemen t Divisio n E P A Regio n VII I 9 9 9 18t h Street , Suit e 50 0 Denver , C O 80202-240 5 EPA' s RP M concernin g Exhibit 6 is : Denis e Link , 8HW M E P A Remedia l Projec t Manage r 

### Hazardou s Wast e Managemen t Divisio n E P A Regio n VII I

. 9 9 9 18t h Street, Suite 50 0 Denver , C O 80202-240 5 5 5

. EP A ha s th e unreviewabl

e righ t t o chang e it s RPMs

. I f E P A change s eithe r o f it s RPMs , EP A wil l .infor m Responden t i n writin g o f th e name , address , an d telephon e number o f th e ne w RPM

. 5 6

. EPA' s RPM s shal l have th e authorit y lawfully veste d i n RPM s an d On-Scen e Coordinator s

(OSCs ) by th e NCP , 4 0 C.F.R

. Par t 300

. EPA' s RPM s shal l have authority , consisten t

wit h th e NCP , t o hal t an y wor k require d b y this Order , and t o tak e an y necessar y respons e action

. 5 7

. Withi n te n (10 ) day s afte r th e effectiv e dat e o f thi s Order , Responden t shal l designat e a Projec t Coordinato r

an d shal l submi t th e name , address , an d telephon e numbe r o f th e Projec t Coordinato r t o EP A fo r revie w an d approval

. Respondent' s

Projec t Coordinato r shal l b e responsibl

e fo r overseein g Respondent' s implementatio n

o f this Order

. I f Responden t wishe s t o chang e it s Projec t Coordinator ,

Responden t shal l provid e writte n notic e t o EPA , fiv e (5 ) day s prio r t o changin g th e Projec t Coordinator ,

o f th e nam e an d qualification s

o f th e ne w Projec t Coordinator

. Respondent' s selectio n o f a Projec t Coordinato r

shal l b e subjec t 

### t o EP A approval

. XVII

. ASSURANC E

OF ABILIT Y T O COMPLET E WORK 58

. Responden t shal l establis h an d maintai n a financia l instrument , trus t account , o r othe r financia l mechanis m suc h a s on e o f thos e se t fort h a t 4 0 C.F.R

. Part 264.143 , acceptabl e t o EPA , funde d sufficientl y t o perfor m th e wor k an d an y othe r obligation s require d unde r this Order , includin g a margin fo r cos t overruns . Withi n 1 5 day s o f th e effectiv e dat e o f thi s 

### Order , Responden t shal l eithe r fun d th e financia l instrumen t o r trus t account o r demonstrat e t o th e satisfactio n

o f -EP A tha t its- > 1 5financia l

resource s ar e .sufficien t t o perfor m th e wor k require d unde r this Orde r projecte d fo r th e perio d beginnin g wit h th e 

### effectiv e dat e o f th e Orde r throug h th e en d o f th e current calenda r year quarter

. O n o r befor e th e 15t h calenda r da y o f 

### eac h calenda r year quarte r thereafter , Responden t shal l eithe r fun d th e financia l instrumen t o r trus t account o r demonstrat e t o' th e satisfactio n

o f EP A tha t it s financia l resources ar e sufficien t t o perfor m th e wor k an d othe r activitie s require d 

### unde r this Orde r projecte d fo r th e succeedin g calenda r year quarter

. Withi n 5 day s o f th e fundin g o f an y account o r othe r .mechanis m o r th e demonstratio n

o f abilit y t o perfor m Work , Responden t shal l repor t suc h t o th e RPM

. 

### 59

. I f a t an y tim e th e ne t wort h o f th e financia l instrumen t o r trus t account i s insufficien t

o r th e othe r demonstratio n o f financia l abilit y i s inadequat e t o assur e performanc e o f th e Wor k an d othe r obligation s unde r th e Orde r fo r t h e upcomin g quarter , Responden t shal l provid e writte n notic e t o E P A withi n 7 day s afte r th e ne t wort h o f th e financia l instrument , trus t accoun t o r othe r demonstratio n

o f financia l

. abilit y become s insufficien t o r inadequate

. Th e writte n notic e shal l describ e wh y th e financia l instrument

, trus t accoun t o r othe r demonstratio n

o f financia l abilit y is insufficien t

an d shal l explai n wha t action s hav e bee n o r wil l be take n t o fun d th e financia l instrumen t o r trus t accoun t adequatel y o r t o demonstrat e t o th e satisfactio n

o f EP A tha t it ha s th e financia l resource s t o continu e th e Wor k throug h th e tim e perio d required

. E P A reserves th e righ t t o terminat e this Orde r i f fundin g become s o r wil l become inadequate

. XVIII

. CERTIFICATIO N

O F COMPLETION

, TERMINATIO N 6 0

. Thi s Orde r shal l terminat e whe n Responden t demonstrate s i n writin g an d certifie s t o th e satisfactio n

o f EP A tha t al l activitie s require d unde r this Order , includin g an y additiona l work , ar e complete

. 61

. Th e certificatio n

shal l b e signe d b y a responsibl e officia l representin

g Respondent

.

Th e representativ e

shal l mak e t h e followin g attestation :

" I certif y tha t th e informatio n containe d i n o r accompanyin

g thi s certificatio n

i s true , accurate , an d complete. " Fo r purpose s o f this Order , a responsibl e officia l i s a corporat e officia l wh o i s i n charg e o f a principa l busines s function

. XIX

. EMERGENC Y RESPONS E 62

. I n th e even t o f an y actio n o r occurrenc e durin g th e performanc e o f th e Wor k whic h cause s o r threaten s a releas e o f wast e materia l tha t constitute s a n emergenc y situatio n o r ma y presen t an immediat e threa t t o publi c healt h .or^welfar e or,th e , .^. ; ,. , 16' .environment

, Responden t shall , subjec t t o th e followin g 

### paragraph , immediatel y tak e al l appropriat e actio n t o prevent , abate , o r minimiz e suc h releas e o r threa t o f release , an d shal l immediatel y notif y th e RPM

. I f this perso n i s no t available , th e Responden t shal l notif y th e EP A Emergenc y Respons e Branch , Regio n 

### VIII

. Responden t shal l tak e suc h action s i n consultatio n

wit h th e RP M an d in accordanc e wit h al l applicabl e provision s

o f th e 

### Health an d Safet y Plans , th e Contingenc y Plans , o r any othe r applicabl e plan s o r document s develope d pursuan t t o this Order

. I n th e event tha t Responden t fail s t o tak e appropriate respons e actio n a s require d b y this Section , an d EP A take s suc h actio n instead , Responden t shal l reimburs e EP A al l cost s o f th e respons e actio n no t inconsisten t

wit h th e NCP

. 63

. Nothing i n th e precedin g paragrap h o r i n thi s Orde r shal l be deeme d t o limit an y authorit y o f th e Unite d State s t o take , direct , o r orde r al l appropriate actio n o r t o see k a n orde r in a Cour t o f competen t jurisdictio n

t o protec t human healt h an d 

### th e environmen t or t o prevent , abate , or minimiz e an actua l or threatene d releas e o f wast e materia l on , at , o r fro m th e Site

. X X

. INSURANC E

AN D INDEMNIFICATIO N 6 4

. (a ) Prio r t o commencemen t

o f any wor k unde r this Order , Responden t shal l secure , an d shal l maintai n i n forc e fo r t h e duratio n o f thi s Order , an d fo r tw o years afte r th e completio n o f al l activitie s require d b y this Order , Comprehensiv e Genera l Liabilit y (CGL ) an d automobil e insurance , wit h limit s o f $2,000,000.0 0

dollars , combine d singl e limit , namin g a s insure d th e Unite d States

. Th e CG L insuranc e shal l includ e Contractua l

Liabilit y Insuranc e i n th e amoun t o f $2,000,000.0 0

pe r occurrence ,

an d Umbrell a Liabilit y insuranc e i n th e amoun t o f $2,000,000.0 0

pe r occurrence .

Responden t

may , i n lie u o f CG L insurance , provid e t o EP A a copy o f it s certificat e o f sel f insurance

.

s ( b ) Responden t shal l als o secure , an d maintai n i n forc e Professiona l

Error s an d Omission s insuranc e i n th e amount o f $1,000,000.0 0

pe r occurrenc e fo r th e duratio n o f thi s Orde r a n d fo r tw o year s afte r th e completio n o f al l activitie s require d b y this Order . * ( c ) Fo r th e duratio n o f this Order , Responden t shal l satisfy , o r shal l ensur e tha t their contractor s

o r subcontractor s satisfy , al l applicabl e laws an d regulation s regardin g th e provisio n o f employer' s liabilit y insuranc e an d workmen' s compensatio n insuranc e fo r al l person s performin g wor k o n behal f 

### o f Respondent

f 

### in furtheranc e o f this Order

. ( d ) I f Responden t demonstrate s

b y evidenc e . . .... . satisfactor y t o EP A that an y contracto r o r subcontracto r maintain s insuranc e equivalen t t o tha t describe d above , o r 1 7insuranc e

coverin g th e sam e risk s but i n a lesse r amount , the n wit h respec t t o tha t contracto r o r subcontractor ,

Responden t nee d 

### provid e onl y that portio n o f th e insuranc e describe d abov e whic h i s not-maintaine d

b y the contracto r or subcontractor

. 

### ( e ) A t leas t 7 day s prio r t o commencemen t

o f an y wor k unde r this Order , an d annuall y thereafte r o n th e anniversar

y o f 

### t h e effectiv e dat e o f thi s Order , Responden t shal l provid e t o EP A certificate s o f suc h insuranc e an d a copy o f eac h insuranc e policy

. Responden t

shal l certif y t o EP A tha t th e require d 

### insuranc e ha s bee n obtaine d b y tha t contractor

. 65

. EP A shal l no t be liabl e fo r an y injur y o r damage s t o person s o r propert y resultin g fro m act s o r omission s o f th e Responden t o r it s Contractor s

in implementin

g th e requirement

s o f thi s Orde r o r an y EPA-approve d

wor k pla n o r planning documents

. EP A shal l no t b e considere d a part y t o an y contrac t entere d int o b y Responden t fo r purpose s o f implementin g this Order

. 6 6

. Responden t

shal l indemnif y an d hol d th e Unite d State s Government , it s agencies , departments ,

agents , an d employee s harmles s fro m an y an d al l claim s o r causes o f actio n arisin g fro m o r o n accoun t o f act s o r omission s o f Respondent , it s employees , agents , servants , receivers , successors ,

o r assigns , o r an y person s including , bu t no t limite d to , firms , corporations , subsidiaries , an d contractors ,

i n carryin g ou t activitie s unde r this Order

. XXI

.

DELA Y I N PERFORMANCE 6 7

. An y dela y i n performanc e o f this Orde r that , i n EPA' s judgment, i s no t properl y justifie d b y Responden t unde r th e terms o f this paragrap h shal l b e considere d a violatio n o f this Order

. A ny dela y i n performanc e

o f this Orde r shal l no t affec t Respondent' s obligation s

t o fully perfor m al l obligation s unde r th e terms an d condition s o f thi s Order

. 6 8

. Responden t

shal l notif y EP A o f an y dela y o r anticipate d dela y in performing an y requirement o f this

. Order

. Suc h 

### notificatio n shal l be mad e b y telephon e t o th e RP M withi n fort y eigh t (48 ) hour s afte r Responden t firs t knew o r shoul d hav e know n tha t a dela y migh t occur . Responden t shal l adop t al l reasonabl e measures t o avoi d o r minimiz e any suc h delay

. Withi n fiv e (5 ) busines s day s afte r notifyin g EP A b y telephone , Responden t shal l provid e writte n notificatio n

full y describin g th e natur e o f th e delay , any justificatio n

fo r delay , any reaso n wh y Responden t 

### shoul d no t b e hel d strictl y accountabl

e fo r failin g t o compl y wit h an y relevan t requirement

s o f thi s Order , th e measures 

### planne d an d take n t o minimiz e th e delay , an d a schedul e fo r implementin g th e measures tha t wil l be take n t o mitigat e th e effect s o f : t h e delay

. Increased

, cost s o r expense s associate d .;.£,, : 18

.

•wit

h implementatio n

o f th e activitie s calle d fo r i n thi s Orde r is no t a justificatio n

fo r an y dela y in performance

. XXII

. UNITE D STATE S NO T LIABLE 

### 6 9

. Th e Unite d States , b y issuanc e o f this Order , assumes n o liabilit y fo r an y injurie s o r damage s t o person s o r propert y resultin g fro m act s o r omission s b y Respondent , o r thei r directors , officers , employees ,

agents , representatives , successors , assigns , contractors ,

o r consultant s i n carryin g ou t an y actio n o r activit y pursuan t t o this Order

. Neithe r EP A no r 

### the Unite d State s ma y b e deeme d t o b e a part y t o an y contrac t entere d int o b y Responden t o r it s directors , officers , employees , agents , successors ,

assigns , contractors ,

o r consultant s in carryin g ou t An y actio n o r activit y pursuan t t o this Order

. XXIII

. ENFORCEMEN

T AN D RESERVATION

S 70

. EP A reserve s th e righ t t o brin g a n actio n agains t Responden t unde r sectio n 10 7 o f CERCLA , 4 2 U.S.C. i 9607 , fo r recover y o f an y respons e cost s incurre d b y th e Unite d State s relate d t o this Order

. Thi s reservatio n

shal l includ e bu t no t be limite d t o pas t costs , direc t costs , indirec t costs , th e cost s o f oversight , th e cost s o f compilin g th e cost documentatio n

t o suppor t oversigh t cos t demand , accrue d interes t as provide d i n sectio n 107(a ) o f CERCLA , 4 2 U.S.C. i 9607(a) , an d an y an d al l othe r cost s no t inconsisten t

wit h th e NCP

. 71

. Notwithstanding

an y othe r provisio n o f this Order , a t an y tim e durin g th e respons e action , EP A ma y perfor m it s ow n studies , complet e th e respons e actio n (o r any portio n o f th e respons e action ) as'provide d i n CERCL A an d th e NCP , an d may see k reimbursemen t

fro m Responden t fo r it s costs , o r see k an y othe r appropriate relief

. 7 2

. Nothing i n this Orde r shal l preclud e EP A fro m takin g a ny additiona l enforcemen t

actions , includin g modificatio n

o f thi s Orde r o r issuanc e o f additiona l Orders , and/o r additiona l remedia l or removal action s a s EP A ma y dee m necessary , or fro m requirin g Responden t in th e futur e t o perfor m additiona l activitie s pursuan t t o CERCLA , 4 2 U.S.C

. § 9606(a) , e t seq. , o r a n y othe r applicabl e law

. Responden t shal l b e liabl e unde r CERCL A sectio n 107(a) , 4 2 U.S.C

. § 9607(a) , fo r th e cost s o f an y suc h additiona l actions

. 7 3

. Notwithstanding

any provisio n o f thi s Order , th e Unite d State s hereb y retain s al l o f it s informatio n

gathering , inspectio n an d enforcemen t authoritie s

an d right s unde r CERCLA , 

### RCR A an d an y othe r applicabl e statute s o r regulations

. -74

. .Responden t

shal l be subjec t t o civi l penaltie s under. , x v } . sectio n 106(b ) o f CERCLA , 4 2 U.S.C

. § 9606(b) , o f no t moir e than:?;

- 1 9$25,00 0

fo r eac h day i n which Responden t willfull y violates , o r 

### fails o r refuse s t o compl y wit h this Orde r withou t sufficien t cause . I n addition , failur e t o properl y provid e respons e actio n 

### unde r this Order , o r an y par t hereof , withou t sufficien t cause , m ay resul t i n liabilit y unde r sectio n 107(c)(3 ) o f CERCLA , 4 2 U.S.C

. § 9607(c)(3) , fo r punitiv e damage s i n a n amount a t leas t equal to , and not mor e tha n thre e time s the amoun t o f an y cost s incurre d b y th e Fun d as a resul t o f suc h failur e t o tak e prope r 

### action

. 75

. Nothing i n this Orde r shal l constitut e o r be construe d a s a releas e fro m an y claim , caus e o f actio n o r deman d i n la w o r equit y agains t an y perso n fo r an y liabilit y i t ma y have arisin g out o f or relatin g i n an y wa y t o the Site

. 7 6

. I f a court issue s a n orde r tha t invalidate s

an y provisio n o f this Orde r o r finds tha t Responden t ha s sufficien t caus e no t t o compl y wit h on e o r mor e provision s o f thi s Order , Responden t shal l remain bound t o compl y wit h al l provision s o f thi s Orde r no t invalidate d b y th e court' s order

. 77

. I n th e even t o f an y inconsistenc y

betwee n th e term s an d condition s o f this Orde r o r thos e containe d i n an y wor k pla n approve d hereunder ,

schedules , attachments ,

exhibits , o r othe r document s incorporate d

herein , th e terms an d condition s o f this Orde r shal l tak e precedence

. XXIV

. ACCES S T O INFORMATIO N 78

. Responden t

shal l provid e t o EP A upo n request , copie s o f al l document s an d informatio n withi n thei r possessio n o r contro l o r tha t o f thei r contractor s

o r agent s relatin g t o activitie s a t th e Site o r t o th e implementatio n

o f this Order , including , bu t n o t limite d to , sampling , analysis , chain-of-custod

y records , manifests , truckin g logs , receipts , reports , sampl e traffi c routing , correspondence ,

o r othe r document s o r informatio n relate d t o th e Work

. Responden t

shal l als o mak e availabl e t o EPA , fo r purpose s o f investigation ,

informatio n

gathering , o r testimony , thei r employees , agents , o r representative s

wit h knowledg e o f relevan t fact s concernin g th e performanc e

o f th e Work

. .

......'- . 7 9

. Responden t

may asser t busines s confidentialit

y claim s coverin g par t o r al l o f th e document s o r informatio n submitte d t o 

### E P A unde r this Orde r t o th e exten t permitte d b y sectio n 104(e)(7 ) o f CERCLA , 4 2 U.S.C

. § 9604(e)(7)

. Suc h claim s shal l b e asserte d 

### i n th e manne r describe d b y 4 0 C.F.R

. § 2.203(b ) an d substantiate d at the time the claim i s made. Document

s or informatio n 

### determine d t o be confidentia l b y EP A wil l be afforde d th e protectio n specifie d i n 4 0 C.F.R

. Part 2 , Subpar t B

. I f n o clai m 

### o f confidentialit

y accompanie s

document s o r informatio n whe n they, : ar e submitte d t o EPA , o r i f EP A has notifie d Responden t

that^the: ? 2 0document

s o r informatio n ar e no t confidentia l

unde r th e standard s o f sectio n 104(e)(7 ) o f CERCLA , 4 2 U.S.C

. § 9604(e)(7) , th e 

### publi c ma y b e give n access t o suc h document s or informatio n withou t furthe r notic e t o Respondent

. 

### 8 0

. N o clai m o f confidentialit

y shal l b e mad e wit h respec t t o an y data , including , bu t no t limite d to , al l sampling , analytical , monitoring ,

hydrogeologic ,

scientific ,

chemical , o r engineerin g dat a an d material s o r informatio n submitte d pursuan t t o thi s Order , o r an y othe r document s o r informatio n evidencin g condition s at o r around the Site

. XXV

. RETENTIO N

O F RECORD S 8 1

. Al l record s an d document s i n Respondent' s possessio n tha t relat e i n an y wa y t o th e sit e shal l be preserve d whil e thi s Orde r i s in effec t an d fo r a minimu m o f 1 0 years afte r commencemen t o f constructio n

o f an y remedia l action

. Responden t shal l acquir e an d retai n copie s o f al l document s tha t relat e t o th e sit e an d ar e in th e possessio n o f it s employees , agents , accountants , contractors ,

o r attorneys

. Afte r this 10-yea r period , Responden t shal l notif y EP A a t leas t 9 0 day s befor e th e document s ar e schedule d t o b e destroyed

. I f EP A request s tha t th e document s b e saved , Responden t shall, a t n o cost t o EPA , giv e E P A th e document s o r copie s o f th e documents

. XXVI

. EFFECTIV

E DAT E 82

. Th e effectiv e dat e o f this Orde r shal l b e th e dat e it i s signe d b y EPA

. XXVII

. COMMUNIT

Y RELATION S 83

. EP A ma y prepar e a communit y relation s pla n describin g th e activitie s it wil l undertak e t o disseminat e informatio n regardin g th e Wor k t o th e public

. Responden t

shal l cooperat e wit h EP A (an d th e State ) i n providin g informatio n

regardin g th e Wor k t o th e public

. A s requeste d b y EPA , Responden t shal l participat e i n th e preparatio n

o f suc h informatio n fo r disseminatio n t o th e publi c an d i n publi c meeting s whic h ma y be hel d or sponsore d b y EP A t o explai n activitie s at or relating t o : th e Site

. .

.

: XXVIII

. MODIFICATIO N 84

. Thi s Orde r ma y be amende d b y EPA

. Amendment s shal l be 

### i n writin g an d shal l b e effectiv e when signe d b y EPA

. 8 5

. N o informa l advice , guidance , suggestions ,

assurances , o r comment s b y EP A o r it s authorize d representative s

shal l modif y th e terms an d condition s o f this Orde r o r reliev e Responden t .o f ; i:: ; : 'it s 'obligatio n unde r this Order

. An y deliverables ,

plansr^-;%-i*S

^



### . . - 2 1

.

;

; 

### -;;^'? :

^ ^technica l

memoranda ,

report s (othe r tha n progres s reports) , 

### specifications ,

schedules ,

an d attachment s require d b y this Orde r are, upo n approva l b y EPA , incorporate d int o thi s Order

. XXIX

. OPPORTUNIT

Y T O CONFER 8 6

. Responden t

may, withi n fiv e (5 ) day s afte r th e dat e 

### thi s Order i s signed , reques t a conferenc e wit h th e EP A Regio n VII I staf f attorney responsibl e fo r this matte r t o discus s this •Order

. - 8 7

. Th e purpos e an d scop e o f th e conferenc e shal l be • limite d t o issues involvin g th e implementatio n

o f th e respons e action s require d b y this Orde r an d th e exten t t o whic h Responden t inten d t o compl y wit h this Order

. Thi s conferenc e i s no t a n evidentiary hearing , an d doe s no t constitut e a proceedin g t o challeng e thi s Order

. I t doe s no t giv e Responden t a righ t t o . see k revie w o f this Order , o r t o see k resolutio n o f potentia l liability , an d n o officia l stenographi c

recor d o f th e conferenc e wil l b e made

. A t an y conferenc e hel d pursuan t t o Respondent' s request , Responden t ma y appea r i n perso n or b y an attorney or othe r representative

. 88

. Request s fo r a conferenc e must b e b y telephon e followe d b y written , confirmatio n

maile d tha t da y to : Andre w J

. Lensink , 8R C Assistan t Regiona l Counse l Offic e o f Regiona l Counse l E P A Regio n VII I 9 9 9 18t h Street , Suit e 50 0 Denver , C O 80202-240 5 (303 ) 294-757 4 • XXX

. NOTIC E OF INTEN T T O COMPL Y 8 9

. Responden t

shal l provide , no t late r tha n fiv e (5 ) day s afte r th e effectiv e dat e o f this'Order , writte n notic e t o th e RP M statin g whethe r i t wil l compl y wit h th e terms o f this Order

. I f Responden t doe s no t unequivocall

y commi t t o perfor m th e Wor k as • provide d b y this Order , i t shal l b e deeme d t o hav e violate d this Orde r an d t o have faile d o r refuse d t o compl y wit h this Order

. Respondent' s writte n notic e shal l describe , usin g fact s tha t exis t o n o r prio r t o th e effectiv e dat e o f this Order , an y "sufficien t cause " defense s asserte d b y Responden t unde r section s 106(b ) an d 107(c)(3 ) o f CERCLA , 4 2 U.S.C

. § § 9606(b ) an d 9707(c)(3)

. Th e absenc e o f a respons e b y EP A t o th e notic e 

### require d b y thi s paragrap h shal l no t b e deeme d .t o b e acceptanc e o f assertion s b y Respondent

.
2

2XXXI

. ORDE R 90

. Based o n the foregoing , Responden t i s hereb y ordere d t o compl y wit h th e provision s o f thi s Order , including bu t no t limite d t o al l attachment s t o thi s Order , al l document s incorporate d b y referenc e int o thi s Order , an d al l schedule s an d deadline s in thi s Order , attache d t o thi s Order , o r incorporate d b y referenc e int o thi s Order

. I T I S SO ORDERED : ENVIRONMENTA L

PROTECTIO N

AGENCY , REGIO N VIII B Y : / £ "S*^- X x X ~*ir**^A

DATE : Rober t L

. Duprey , Dir&dtor/V Hazardou s Wast e Manag^meni^/Divisio n

23APPENDI X A - WORKPLA

N CHANGE S

> 

### T he change s outline d belo w ar e hereb y mad e i n th e reference d wor k plans , an d wit h thes e changes , th e reference d wor k plan s ar e hereb y approved

. A

. Change s t o Wor k Pla n fo r Samplin g an d Analysis , o f Lea d Occurrenc e i n an d Immediatel y Adjacen t t o Residentia l Areas , Jul y 1991 , Exhibit 2

. 1 ) Th e titl e is change d t o rea d FINA L SAMPLIN

G PLA N FOR SAMPLIN G AN D ANALYSI S O F LEA D OCCURRENC

E WITHI N AN D IMMEDIATEL Y ADJACEN T T O RESIDENCES

. 2 ) Sectio n 2.0 , Pag e 2-1 , Para

. 3 : Befor e "A n effor t wil l be made... " plac e th e language : A minimum o f 10 0 home s 

### wil l b e sample d accordin g t o the protocol s set fort h i n thi s wor k plan

. Thes e 10 0 home s wil l b e 

### representativel

y distribute d

accordin g t o th e ag e o f eac h hom e an d it s geographi c locatio n withi n th e Populate d Remedia l Investigatio n

Stud y Area

. A minimu m o f 50 % o f thes e home s wil l hav e childre n ag e 6 month s t o 7 2 month s i n residence

. Th e sentenc e beginnin g "A n effor t wil l be made... " i s change d t o read : Additionally , a n effor t wil l be made..

. . 3 ) Sectio n 4.1.1 , Pag e 4-1: Creat

e a ne w Sectio n 4.1. 1 an d renumbe r subsequen t sections

. Th e ne w sectio n i s entitle d Initia l Visi t an d reads : Befor e samplin g 

### occurs , a n initia l visi t wil l b e conducted

. Th e purpos e o f thi s visi t wil l be t o explai n th e objective s o f EPA' s remedial investigatio n

an d t o reques t 

### permissio n t o releas e t o EP A the result s o f sampling

. 4 )

. Sectio n 4.1.3.1 , Pag e 4-7 , Para

. 2 : Ite m No

. 1 is . change d t o read: A floo r are a directl y insid e th e mai n . 

### entranc e t o th e residence

. .

- :_ . 5 ) Sectio n 4.1.3.1 , Pag e 4-8 , Para

. 2 : Ite m No

. 1 i s v change d t o read : I f possible , a n additiona l dus t 

### sampl e wil l b e obtaine d from : 1 ) beneat h carpet s an d 2 ) atti c areas . 6 ) Sectio n .4.1.3.1 , Pag e 4-8 , Para

. 2 : Th e firs t sentenc e ; _ 

### i s change d t o read : Colocate d sample s wil l b e ?
~ collecte d fro m 20 % o f the house s and wil l b e evaluate d fo r speciatio n in accordanc e wit h th e Metal s Speciatio n Work Pla n fo r thi s 'study

. •-.-:•.'•^-^-.^''•"f-

-- - V -V;. : 

### r,:-- ; 

### r "7

) Sectio n 4.1.3.1 , Pag e 4-8 , Para

. 4 : Whe n dus t sample s ar e collected , a tri-directiona l

swee p patter n shoul d b e used wher e th e secon d swee p i s i n a directio n 9 0 

### degree s t o th e first , an d the 1 

### thir d directio n i s 4 5 degree s fro m th e firs t sweep

. Al l reference s t o this « techniqu e throughou t th e wor k pla n shal l be correcte d (e.g. , p

. 4-16 , p

. B-3

. p

. B-17)

. 8 ) Sectio n 4.1.5 , Pag e 4-19 , Para

. 1 : Th e followin g actio n level s shal l b e state d fo r th e analytica l method s - Al l sample s wit h lea d detecte d a t 2 0 pp m o r 

### les s shal l be re-analyze d b y graphit e furnac e atomi c absorption

. 9 ) Sectio n 4.1.6 , Pag e 4-20 , Sentenc e 1 : Th e sentenc e i s change d t o read: Introduction ,

preliminary

residentia l walk-through , an d request t o releas e result s o f 

### samplin g t o EPA

. 1 0 ) Sectio n 6.0 , Pag e 6-1 : Th e second an d thir d sentence s ar e change d t o read : Fo r the minimum 10 0 home s sample d (the y mus t be representativel

y distributed

, n o les s tha n 50 % o f the m wit h childre n age 6 t o 7 2 months i n residence ) th e environmenta l

samplin g form s containe d in Appendi x A (for m number s 05-08 ) wil l b e complete d an d submitte d t o EP A alon g wit h th e result s o f th e samplin g parameter s

prescribe d in th e wor k plan

. Fo r al l othe r home s sampled , i f permissio n has bee n receive d t o releas e samplin g result s t o EPA , th e form s 

### se t fort h i n Appendi x A wil l be complete d an d submitte d t o EP A alon g wit h th e result s o f th e samplin g parameters prescribe d i n the wor k plan

. 1 1) Appendi x B,Sectio n 9A , Pag e B-6 : Thi s procedur e shal l b e modifie d t o includ e th e ful l aci d digestio n o f th e sampl e filte r instea d o f th e filte r was h an d discar d step

. 1 2 ) Appendi x B , Sectio n 9A , Pag e B-8 : Thi s procedur e shall , b e modifie d t o include : Al l sample s wit h lea d detecte d a t 2 0 pp m o r les s shal l b e re-analyze d b y graphit e furnac e atomi c absorption

. 1 3 ) Appendi x B,Sectio n 9A , Pag e B-20 : Al l analytica l calibratio n procedure s

withi n this wor k pla n shal l b e 

### •modifie d t o includ e a minimu m o f 5 calibratio n points, , n o t 3,a s state d i n paragrap h 7 o f pag e B-20

. . : - 1 4 ) Appendi x B , Sectio n 9B , Pag e B-24 , Tabl e 5-3 : Th e .



### - frequenc y

o f Calibratio n

Verificatio n

an d Instrumen t

; 

### Blan k sample s shal l be 1 pe r 1 0 sample s instea d :,'of "*J.M^ lp e r

20

. I n addition , th e frequencie s

o f Deco n Blan k samples

. Duplicat e samples , Replicat e Analysi s samples , a n d Interlaborator y

Spli t sample s wil l b e analyze d ever y 1 pe r 2 0 sample s o r 1 pe r da y whic h eve r i s mor e 

### frequent

. 1 5 ) Th e wor k pla n shal l b e amende d t o requir e th e us e o f Custod y Seal s o n al l sampl e container s prio r t o transportatio n

off-site

. 1 6 ) Appendi x D , Sectio n 5 , Pag e D-3 , Table 1 : Th e Limi t o f Detectio n fo r th e A.A.S

. analysi s shal l b e change d t o 1 p p m (mg/kg)

. 1 7 ) Appendi x D , Sectio n 9B , Pag e D-11 , Tabl e 5-3 : Th e frequenc y o f Calibratio n Verificatio n

an d Instrumen t Blan k sample s shal l be 1 pe r 1 0 sample s instea d o f 1 p e r 20

. I n addition , th e frequencie s

o f Deco n Blan k samples , Duplicat e samples , Replicat e Analysi s samples , a n d Interlaborator y

Spli t sample s wil l b e analyze d ever y 1 per 2 0 sample s or 1 per da y whicheve r i s mor e frequent

. B

. Change s t o Min e Waste Remedia l Investigatio n

Wor k Plan , Jul y 1991 , Exhibi t 4

. T h e Min e Wast e Pil e Remedia l Investigatio n

Wor k Pla n i s change d a s follows : Withi n 3 0 day s o f th e dat e o f thi s Order , a flo w diagra m depictin g th e mine wast e pil e samplin g an d evaluatio n proces s an d it s relatio n t o othe r R I procedures , alon g wit h a n accompanyin

g narrativ e descriptio n o f tha t sam e process , shal l b e provide d t o EPA

. C

. Change s t o Tailin g Disposa l Are a Remedia l Investigatio n

Wor k Plan , Jul y 1991 , Exhibi t 5

. 1 ) Physica l an d chemica l informatio n

characterizin

g Resurrectio n 1 and Resurrectio n

2 Tailing s (Re s 1 and I Res 2 ) mus t be provide d t o EPA

. Unles s suc h informatio n i s presentl y available , a remedia l : 

### investigatio n must b e undertake n a t Re s 1 an d Re s 2 consistin g o f th e collectio n o f subsurfac e tailing samples , collectio n o f groundwate r samples , analytica l testing , an d geotechnica l

laborator y testing

. Specifically , thes e activitie s wil l consis t of : a . Drilling o f thre e tes t holes , tw o a t Re s 1 an d on e a t Res 2 , t o foundatio n materia l wit h sampling



### . . . : : 

### . fro m th e to p 2 feet , a t about 5-foo t intervals,',;

.

:. yan d a t change s in materia l identifie d durin g drilling

. 

### i

. Tw o tes t hole s wil l b e drille d throug h th e buried tailin g at Re s 1-—wit h one locatio n at wha t i s determine d t o b e th e thickes t sectio n 

### o f th e tailin g an d anothe r drille d a t wha t i s determine d t o b e an upgradien t locatio n i n t h e tailing

. 

### ii

. On e hol e wil l be drille d a t Re s 2

. Thi s hol e penetrat e what i s judge d t o be th e thickes t sectio n o f burie d tailing

. T h e location s o f th e tes t hole s wil l b e establishe d in th e fiel d base d o n th e sit e reconnaissanc e

an d revie w o f historica l data

. Disturbe d an d relativel y "undisturbed "

sample s i n t h e tes t hole s wil l b e collecte d usin g shelby tubes , a n Osterbur g sampler , spli t spoon s (SPT ) o r a Californi a driv e sampler

. Wate r level s wil l b e measure d in th e Re s 1 tes t hole s durin g drillin g a n d 2 4 hours afte r drillin g completio n

t o allo w f o r stabilizatio n

o f wate r levels

. Installatio n o f monito r wells

. Eac h o f th e hole s wil l b e complete d a s monito r well s in th e tailing s i f wate r is encountered

.

Th e well s wil l b e screene d nea r th e base o f th e tailings

. Th e well s wil l b e develope d an d sample d an d th e sample s wil l b e analyze d fo r th e parameter s liste d i n Tabl e 2

- 5

. . . .' •

.. . .. . . . - •

. . Chemica l Analyses

. Al l tailin g an d foundatio n sample s fro m th e Re s 2 hol e an d th e deepe r hol e a t R e s 1 wil l b e analyze d fo r th e parameter s liste d i n Table 2-2

. The remainin g hol e at Res 1 wil l be

sample d a t th e followin g depth s an d submitte d fo r chemica l analysis : i

. Withi n 5 fee t above groundwate r

i n th e tailing i f th e groundwate r

i s a t a dept h

. greate r tha n 1 0 feet

. i i

. Withi n 5 fee t belo w groundwate r iii

. Withi n 5 fee t above th e foundatio n materia l i f th e vertica l distanc e betwee n groundwate r

.-i , an d th e foundatio n materia l i s greate r tha n

. 1 0 feet

. . .:.'.. . -

: . ,..'-: •i v

. Withi n th e foundatio n materia l belo w th e tailing

. . ; d

. Geotechnica l

Analyses

. Sample s fro m th e tes t 

### hole s wil l b e teste d fo r physica l parameters

.

Th e ; 

### testin g ma y include : * • i

. Moistur e content ; AST M D221 6 i i

. We t an d densities ; AST M D221 6 iii

. Particl e siz e distribution ;

AST M D42 1 an d D42 2 iv. • Atterberg limit s (liqui d limi t an d plasticit y index) ; AST M D431 8 The specifi c geotechnica l

testin g progra m wil l b e establishe d base d o n th e type s o f material s encountered , sample s recovered , an d engineerin g judgment

. Othe r propertie s fo r desig n wil l b e estimate d fro m index propertie s o r collecte d durin g remedia l design , i f needed

. A n amendment t o th e approve d workpla n addressin g th e above requirement

s shal l be submitte d t o EP A n o late r

. tha n Septembe r 15, 1991

. 2 ) Investigation s

o f Hecla tailings

. T h e investigation s

o f Hecla tailing s specifie d i n Sectio n 2.3.5 , pag e 2-20 , ar e approved

. However , thes e investigation s

shoul d no t begi n until Septembe r 16 , 1991

. I n th e even t tha t "a n administrativ e

orde r o n consen t o r unilatera l administrativ e

orde r wit h a n approve d wor k pla n fo r stud y o f thes e tailing s is issue d t o Hecl a Minin g Company b y Septembe r 15, 1991 , this sectio n o f th e wor k pla n shal l b e nul l an d void

. 

### D .

. Change s t o Surfac e Water , Be d Materia l an d Aquati c Ecosyste m Dat a Collectio n Progra m Wor k Plan , Jun e 1991 , Exhibit 6

. 1 ) Pag e 2- 1 , Objectives : Remove th e phrase , "Eliminat e .i:;:;:':;..: : :;, ; samplin g a t station s wher e contaminant

s o f concer n ar e not detected. " 2 ) Sectio n 4.2 , Pag e 4-3 : Correc t th e rang e fo r zin c concentration s

t o rea d 63 0 - 915 0 mg/1

. - 2) Table 6- 1 ; Chang e EP A GFA A metho d fo r lea d t o 239.2 ;

:



### . . : Chang e metho d number fo r p H t o 150.1 ; .''--.', •

VWftfo i gST :Chang e metho d number fo r bicarbonat e an d carbonat e t o SM403 ; 

### Chang e metho d numbe r fo r cyanid e t o 335.3

. 4 ) Figur e 6-1 : Modif y sampl e locatio n numberin g syste m t o 

### correspon d t o th e USG S numberin g syste m fo r surfac e wate r samplin g location s o n th e Arkansa s Rive r an d it s tributaries

. 5 ) Tabl e 6-2 : Ad d detectio n limit s fo r parameter s t o b e analyze d in be d materia l samples

. Se e Attachmen t I , USEP A Contrac t Laboratory Program , Statemen t o f Wor k Fo r Inorgani c Analysis , Multi-Media ,

Multi-Concentration , ILM01.0 , July , 1988

. However , th e CRDL i s dependen t o n th e dr y weigh t o f th e sample

. T h e metho d t o determin e sedimen t detectio n limit s i s a s follows : (Aqueou s CRDL s (ug/L) X 0.200D/ 1 gra m (dry)*

. * Dr y weigh t = weigh t X % solid s Antimon y mus t b e analyze d usin g th e Furnac e A A analysis , metho d 204.2

. 6 ) SO P 2A , Pag e 6 : Remove paragrap h 1 , sinc e depth

integrate d sampling i s no t appropriat e i n th e Arkansa s River Basin

. 7 ) SO P 2A , Pag e 12 , Paragrap h 2 : Sample s fo r alkalinity , chloride , fluoride , an d cyanid e must b e determine d a s total s (i.e. , unfiltered)

.

Ad d tha t sample s wil l be checke d fo r th e presenc e - o f chlorin e an d sulfide , whic h ma y interfer e wit h th e cyanid e analysis

. 8 ) SO P 2A , Pag e 1 3 an d 14 , Rinsat e Sample s an d Field Blanks : Modif y las t sentenc e t o stat e tha t on e rinsat e sampl e wil l b e collecte d fo r ever y twent y (20 ) water:sample s

o r onc e a . day , whicheve r i s mor e frequent

.' /" " 9 ) SO P 4A , Pag e 7, Wate r Fle a Toxicit y Testing : - - Modif y text t o stat e tha t sample s fro m Californi a Gulc h ma y requir e dilutio n t o 0.2 5

. . percent , sinc e toxicit y belo w 1 percen t ha s 

### bee n observe d i n previou s studies

. 1 0 ) SO P 4A , Pag e 7 , Fathea d Minno w Toxicit y Testing ; .::; ;



### . -Modif y thir d sentenc e t o stat e tha t th e ; fathea d minno w test s shal l b e conducte d fo r ^ ^
: 

### 4 ' ; ; 

### .:-w ^forty-eigh t (48 ) hours a t 20°C(+/-2°C)

. 

### Modif y nex t sentenc e t o stat e tha t th e minnows wil l b e fe d 0. 1 millilite r brin e 

### shrim p prio r t o selectio n an d a t 2 4 hours

. 1 1 ) SOP 4A , Pag e 8 , Benthic Macroinvertebrates :

- A d d th e following : "A t station s wher e th e flow s ar e . to o high fo r a standar d D-fram e kick-ne t sampler , a kic k scree n sample r wil l be used

. A technicia n wil l b e require d t o hol d the 

### sample r in plac e whil e a secon d technicia n agitate s th e streambe d surrounde d b y th e 

### sampler

. Sample s wil l b e pu t int o whit e pan s fo r pre-sortin g an d wil l be rinse d throug h a number 3 0 mes h scree n prio r to 1 preservation

. Sample s wil l b e preserve d wit h 95 % ethano l a n d place d i n non-breakabl

e (i.e. , plastic ) containers

. Streamflo w

measurement

s wil l b e conducte d concurrentl

y wit h sampl e 

### collection. " A d d th e stipulatio n tha t when a benthic sampl e canno t b e identifie d t o th e Genu s leve l fo r th e chironomida e Family , th e sampl e wil l b e give n t o EP A fo r identification

. 1 2 ) SO P 4A , Pag e 9 , Fish : Ad d th e sentence , "Fis h ag e wil l als o be confirme d b y usin g a standar d fis h scal e analysis. " 1 3 ) SO P 4A , Pag e 10 , Fish : Small fis h must b e collecte d t o obtain a minimum weigh t o f 30 0 - 50 0 grams. . 

### Ad d copper , chromium an d arseni c t o th e lis t

. o f parameter s in th e las t paragraph

. • ; . : - : 1 4 ) SO P 4A , Pag e 12 , Table 4-1 : Table 4- 1 mus t b e modifie d as follows : . A d d a n additiona l sampling statio n t o sampl e 

### t h e contaminan t

plum e a t statio n AR- 3 fo r al l .- .

: 

### • > ; 

### ; ; parameters

. The station s shoul d b e labele d , . , ,: S as AR-3 E an d AR-3W-t o indicat e eas t an d west .::--. • bank

. , '..'.,: • , • - ...:/.,:•".• ; :... . , ..:.._;'...- . •;;.::•;'.'_:;,-;;; , A d d a surfac e wate r sampling statio n downstrea m o f AR-3

. Immediatel

y abov e th e confluenc e o f Hal f Moo n Creek shoul d b e th e approximat e 

### " • location

. : • ; '-' ^ :•".• • • "

. ;' • • • ••-.

. - . . .,-•! A d d Statio n EM-2 , EM-3 , an d EM- 4 t o b e sample d fo r fis h (tota l o f 1 5 fis h samplin g stations)

. , . : ;A d

d a n additiona l statio n o n Californi a Gulc h upsti = o f th e Ya k Tunne l discharg e t o th e lis t o f Benthic sampling stations

. 

### A d d station s IG-1 , HC-1 , LF-1 , an d EF- 1 t o th e toxir testin g lis t (tota l o f 1 9 toxicit y testin g 

### stations)

. 1 5 ) A stor m even t surfac e wate r sampling progra m must r implemente d durin g th e summer o f 1991

. Attachmen t 2 i s a minimum requirement

s progra m tha t must be incorporate d

int o th e sampling program

. Ad d languag e regardin g th e 

### stor m event sampling progra m indicatin g tha t EP A wil l b e notifie d ever y tim e tha t a stor m 

### even t sampl e i s collected

.

8ATTACHMEN T 2 MINIMU M REQUIREMENT

S FO R A STOR M EVEN T SAMPLIN G PROGRA M FO R SURFAC E WATE R A T TH E CALIFORNI A GULC H SIT E Purpos e 

### T h e stor m even t sampling progra m is designe d t o determin e t h e chemica l loadin g o f metal s t o th e Arkansa s Rive r fro m 

### Californi a .Gulc h durin g a rainfal l stor m event

. Th e dat a wil l serve a s a preliminar y determinatio n

o f th e effect s o f a stor m 

### event o n th e aquatic biot a in th e surfac e water

. Th e result s wil l als o be used t o determin e whethe r a detaile d stor m even t monitorin g progra m wil l b e designe d fo r Californi a Gulc h Sit e i n 

### t h e future

. F o r purpose s o f thi s monitorin g program , a stor m event i s define d a s a rai n even t tha t result s i n at a minimum o f 0. 1 inche s o f rainfall t o a surface

. 

### Dat a Qualit y Objective s T h e dat a qualit y objectiv e o f th e stor m even t surfac e wate r dat a collectio n i s t o collec t dat a o f sufficien t qualit y t o determin e th e change s in wate r colum n chemistry an d possibl e 

### impact s t o aquatic biot a i n th e Arkansa s River fro m Californi a 

### Gulc h durin g stor m events

. Th e dat a wil l be use d t o determin e th e chemica l loadin g o f metal s durin g a stor m even t t o th e Arkansa s River

. Othe r potentia l uses o f th e dat a include : o 'environmenta l

baselin e ris k assessment;

-

-,- ;

, o surfac e wate r modelin g o f contaminan t

transpor t fro m Californi a Gulch ; 

### o and , screenin g an d evaluatio n o f remedia l measures . Parameter s 

### flo w coppe r p H ""'"" " iron 

### conductivit y . . . lea d tota l suspende d sedimen t magnesiu m arsenic . manganes e _cadmiu m silve r calciu m „ • zin c

.-••- • Toxicit ySampl e

Location s CG6 : Californi a

Gulc h abov e th e confluenc e wit h th e Arkansa s River ; 

### AR2 : Arkansa s

River upstrea m o f Californi a Gulch ; AR3E : Eas t Ban k o f th e Arkansa s Rive r downstrea m o f Californi a Gulch ; AR3A : Arkansa s

Rive r downstrea m o f ARSE

. Frequenc y • Sample s mus t b e collecte d durin g rainfal l stor m event s tha t occu r betwee n Augus t 1 , 199 1 an d Septembe r 30 , 1991

. Th e samplin g interva l durin g th e stor m even t shoul d be designe d t o captur e sample s in th e rang e o f ever y 1 5 minute s t o on e hal f hour

. . Instrumentatio n Sample s mus t b e collecte d usin g precipitation-activate d sampler s o r b y personne l locate d near th e sit e directe d t o collec t sample s whe n a stor m even t tha t result s i n 0. 1 in

. o r mor e o f precipitatio n

occurs .