UNITE D

STATE S ENVIRONMENTA L

PROTECTIO N

AGENC Y REGIO N VII I 9 9 9 18t h STREE T

- SUIT E 50 0 DENVER

, COLORAD O 80202-2466 

### 37591 8 Ref : 8EPR-S R ACTIO N MEMORANDUM

-

- ENFORCEMEN

T DATE : Augus t 15, 199 6 SUBJECT : Reques t fo r Remova l (Response ) Action s a t Asarco' s Work Are a o f th e Californi a Gulc h Nationa l Prioritie s

Lis t Sit e (Site)

, Leadville

, Colorado : ACTIO N MEMORANDU

M fo r P R P Finance d Remova l Action s Addressin g Min e Waste Roc k Pile s Locate d i n th e Residentia l Populate d Areas

, a portio n o f Operabl e Unit 9/ / (OU 9 )

. FROM : Rebecc a Thomas

, 8EPR-S R T O : Ma x H

. Dodson

, Assistan t Regiona l Administrato r Offic e o f Ecosystem s Protectio n and Remediatio n Fina l NP L Sit e I D f t 2 9 CERCLI S I D # COD98071793 8 Categor y o f Removal : Non-Tim e Critica l I

. Purpos e Thi s Actio n Memorandu m document s th e Agency' s decisio n t o conduc t th e Remova l (response ) Actio n describe d herei n fo r th e min e wast e roc k pile s locate d withi n O U 9 , Residentia l Populate d Areas

, o f Asarco' s Work Are a o f th e Californi a Gulc h Superfun d Sit e (Site)

. Th e evaluatio n o f alternative s availabl e t o addres s thes e min e wast e roc k pile s i s containe d i n th e "Draf t Min e Wast e Engineerin g Evaluation/Cos t

Analysi s (EE/CA)

, Californi a Gulc h Superfun d Site

, Leadville

, Colorad o whic h i s date d Decembe r 1995

. Th e Draf t EE/C A an d Asarco' s response s (Lette r date d Jul y 23,1996 ) t o EPA' s comment s represen t th e fina l EE/C A fo r thes e respons e actions

. T h e EE/C A wa s prepare d b y Asarco

, Inc.

, Denver

, Colorado

, fo r a portio n o f th e Sit e withi n it s "are a o f responsibility "

a s define d b y th e Augus t 26 , 199 4 Consen t Decre e betwee n th e Unite d State s an d Asarco

, Inc

. Th e Remova l Actio n fo r th e min e wast e roc k pile s withi n th e residentia l populate d area s i s consisten t wit h th e overal l remedia l activitie s t o be undertake n b y Asarco

, Inc

. a t O U 9

. A s such

, the Remova l Actio n alternative s

evaluate d i n th e EE/C A ar e considere d t o represen t interi m respons e actions
, bu t th e remova l alternative s wil l als o b e evaluate d a s fina l remedia l

Printed on Recycled Paper

### alternative s

i n th e Feasibilit y Stud y (FS ) an d Recor d o f Decisio n (ROD ) fo r OU9

. Th e Remova l Actio n is no t intende d t o 

### b e a fina l action
, but i s rathe r intende d t o contribut e t o the 

### efficien t performanc e

o f th e remedia l actio n fo r O U 9

. Th e R O D fo r O U 9 wil l ultimatel y determin e whethe r furthe r 

### remedia l action s ar e required

. T h e primar y goal s o f thi s Remova l Actio n ar e t o reduc e th e 

### exposur e o f th e residentia l populatio n t o metal s contaminatio n 

### i n th e min e wast e roc k pile s an d t o reduc e th e ris k t o th e aquatic an d terrestria l ecosystem s

b y reducin g th e releas e o f contaminate d materia l int o th e environment

fro m th e min e wast e 

### roc k pile s i n th e residentia l populate d areas

. Thi s Remova l Actio n wil l als o reduc e th e potentia l fo r leachin g an d migratio n o f metal s fro m th e min e waste s int o surfac e an d 

### groun d waters

. Remedia l actio n objective s wer e identifie d i n th e Fina l 

### Screenin g Feasibilit y Stud y fo r Remediatio n Alternative s

a t t h e Californi a Gulc h NP L Site

, Leadville

, Colorad o (SFS)

, 

### (EPA

, 1993a)

. Consisten t wit h th e SFS

, remova l actio n objective s fo r th e residentia l populate d area s are : O Contro l win d an d wate r erosio n o f min e wast e roc k 

### materia l fro m th e sourc e location s O Contro l leachin g an d migratio n o f metal s fro m min e 

### wast e roc k int o surfac e wate r O contro l leachin g an d migratio n o f metal s fro m min e wast e roc k int o groundwate r 

### Remova l alternative s

t o directl y remediat e surfac e wate r o r ground wate r i n th e residentia l populate d area s ar e beyon d th e scop e o f thi s EE/CA

. Consisten t

wit h th e Consen t Decre e an d Wor k Are a Managemen t Pla n (WAMP)

,

Applicable o r Relevan t an d 

### Appropriate Requirement

s (ARARs

) specifi c t o surfac e wate r an d groundwate r ar e no t include d a s performanc e standard s fo r 

### evaluatio n o f thi s respons e action

. I I

. Californi a Gulc h Sit e - Condition s an d Backgroun d T h e Californi a Gulc h Sit e wa s liste d o n th e Nationa l 

### Prioritie s Lis t o n Septembe r 8 , 1983

. Th e Sit e i s in a minin g are a coverin g 1 6 1/ 2 square mile s o f a watershe d are a tha t drain s alon g Californi a Gulc h t o th e Arkansa s River

. Startin g 

### in 1859 , th e are a wa s mined extensivel y fo r gold

, lead

, silver

, copper , zinc
, an d manganese

. Californi a Gulc h collect s runof f tha t drain s numerou s abandone d mine s an d waste s fro m mining
, millin g an d smelting

. Seventy-fiv e

know n 

### mill s dumpe d tailing s int o 5- 6 mile s o f drainage s an d 6

### impounde d

tailing s dump s surround th e Cit y o f Leadville

. Man y 

### smelter s operate d a t variou s time s aroun d th e Cit y processin g silver

, lead

, an d zinc

. Heav y meta l residue s ar e presen t i n 

### muc h o f th e City

. Th e Arkansa s River

, whic h receives wate r fro m th e Californi a Gulch

, ha s bee n classifie d a s a recreationa l resource , an d i s used heavil y fo r irrigation
, livestoc k watering
, publi c wate r supplie s an d fisheries

. Approximatel y 4,00 0 liv e in nearb y Leadvill e an d Lak e County

. 

### (Sit e Locatio n Map s ar e attache d a s Exhibit s 1 & 2 , Figure s 1 & 1- 1 respectively. ) III

. Condition s an d Backgroun d 

### T h e min e wast e roc k pile s evaluate d in th e EE/C A ar e locate d throughou t th e populate d are a o f easter n Leadville

. (Se e attache d Exhibit 3 , Figur e 3.1. ) Durin g th e Min e Wast e 

### Remedia l Investigation

,

8 o f th e 3 8 pile s wer e foun d t o be 

### stockpile s o f constructio n

material s o r t o no t pos e a threa t t o huma n healt h o r th e environment

.

However

, on e pil e representin g this grou p was evaluate d wit h th e remainin g 3 0 

### pile s a s a contro l t o confir m th e EE/CA' s findings

. Therefore

, a tota l o f 3 1 pile s wer e investigate d

in detail

. 

### Onl y thos e pile s whic h contai n surfac e concentration s

o f tota l lea d greate r tha n 200 0 pp m wil l be subjec t t o th e Remova l 

### Action

. (Figur e 3. 1 o f th e EE/CA)

. However

, sinc e EP A ha s propose d a n Actio n Leve l fo r th e min e wast e roc k pile s o f 3,50 0 pp m lead

, Asarc o wil l reserve th e optio n t o remov e o r 

### leav e in plac e pile s betwee n th e 200 0 pp m actio n leve l base d

o n th e Min e Wast e Work Pla n an d Asarco' s WAM P (appendi x t o th e consen t decree ) an d th e 350 0 pp m actio n leve l fo r lea d selecte d in this Remova l Action

. Othe r factor s tha t wer e 

### considere d in selectin g thi s Remova l Actio n are : O Th e min e wast e roc k pile s are i n or nea r a populate d area; 

### O Metal s concentratio n

in th e pile s exceed s backgroun d leve l (200 0 pp m lea d fo r this Remova l Action) ; 

### O Th e pile s pos e a n attractiv e nuisanc e i n th e 

### are a whic h ma y increas e exposur e t o elevate d metals ; 

### O Som e pile s are stee p and ma y b e unstabl e i n thei r presen t condition ; and

, O Th e pile s ar e subjec t t o erosio n b y win d an d wate r whic h ma y sprea d contaminants

.

### T h e

min e wast e roc k pile s ar e bein g addresse d prio r t o a Recor d o f Decisio n (ROD)

. Th e min e wast e roc k pile s ma y 

### contribut e t o lea d exposur e i n th e residentia l area

. 

### Therefore

, it i s necessar y t o evaluat e alternative s

fo r eac h pil e accordin g t o it s chemica l content , locatio n an d current 

### condition

. Th e fina l remedia l action s ar e t o b e establishe d

a t th e time o f th e ROD

. 

### A summar y o f maximu m metal s concentration s

i n the min e wast e roc k pile s i s show n i n Tabl e 2. 1 o f th e EE/C A whic h i s attache d a s Exhibit 4

. 

### T h e engineerin g an d geochemica l evaluatio n o f th e min e wast e 

### roc k pile s wer e conducte d t o characteriz e

th e existin g wast e pile s t o facilitat e developmen t

o f remova l alternatives

. Geochemica l analyse s wer e performe d t o evaluat e whic h pile s woul d requir e a remova l action

. Th e screenin g proces s i s show n in attache d Exhibit 6 , Tabl e 3.2

. 

### Exhibi t 3 , Figur e 3. 1 o f th e EE/C A identifie s th e pile s i n eac h category

. 

### Onl y min e wast e roc k pile s containin g lea d level s greate r tha n 3,50 0 pp m ar e bein g addresse d as par t o f this Remova l Action

. A n y appropriat e respons e action s fo r min e wast e roc k pile s 

### containin g lea d level s les s 350 0 pp m lea d wil l b e selecte d i n the fina l RO D for O U 9

. B

. Othe r Action s t o Dat e Ther e hav e bee n n o previous action s take n o n th e min e 

### wast e pile s i n th e residentia l populate d areas

. Ther e hav e bee n remova l action s involvin g surfac e soil s i n th e residentia l area s unde r th e Kid s Firs t program

. 

### C

. Stat e an d Loca l Authorities Role s 

### O Th e Draf t EE/C A wa s issue d fo r publi c commen t an d a publi c hearin g was hel d t o discus s this Remova l 

### Action

. EPA

, CDPHE

, Lak e Count y an d ASARC O 

### commente d o n th e Draf t EE/CA

. Asarc o responde d t o thos e comment s b y lette r date d Jul y 23 , 1996

. 

### O Cultura l Resources Findings : Leadvill e ha s bee n classifie d a s a Nationa l Histori c Landmark

. Therefore

, th e identificatio n

an d evaluatio n (ID&E )

o f th e potentia l effect s o f remediatio n o f histori c 

### propertie s wa s require d fo r thi s Remova l Action

. T h e ID&E wa s performe d in tw o phases : a reconnaissance-leve l

examinatio n

in January 1995 ,

### a n d

a detaile d Clas s II I surve y i n Jun e 1995

. Th e presenc e o f intact
, substantial

, structura l remain s a s wel l a s visua l prominence/contributio n

o f th e 

### cultura l landscape

, determine s th e potentia l fo r a resourc e t o b e recommende d a s eligibl e fo r listin g o n th e Nationa l Registe r o f Histori c Place s (NRHP)

. 

### Eligibilit y fo r listing ca n b e a consideratio n

in th e selectio n o f a respons e action

. Eac h min e wast e roc k pil e withi n Asarco' s are a o f responsibilit

y wa s examined

. Th e result s ar e summarize d i n th e Cultura l Resourc e Managemen t Summar y whic h i s attache d a s Exhibit 7
, Tabl e 7-2

. A mitigatio n pla n 

### shal l b e prepare d fo r an y cultura l resource s adversel y affecte d b y thi s Remova l Action

. Thi s 

### mitigatio n pla n wil l b e implemente d a s par t o f th e 

### Remova l Action

, afte r th e pla n ha s bee n approve d b y SHPO

. O Cit y o f Leadville : EP A ha s notifie d th e citizen s o f Leadvill e b y th e releas e o f an d acceptanc e o f publi c commen t o n th e Engineerin g Evaluation/Cos t

Analysi s 

### (EE/CA ) concernin g this remova l action

. Unde r CERCL A § 121(e)

, n o Stat e o r loca l permit s ar e require d fo r th e remova l actio n sinc e this remova l 

### actio n wil l b e conducte d entirel y on-site

. 

### I V

. Threat s t o Publi c Health o r Welfar e o r th e Environment

, an d Statutor y an d Regulator y Authoritie s Resident s ar e expose d through contac t wit h th e min e wast e material s whic h contai n elevate d metal s levels

. Exposur e o f 

### childre n i s o f particula r concern

. Th e exposur e pathway i s b y win d erosio n an d direc t ingestion

. Ther e i s als o evidenc e o f direc t contac t o f sensitiv e huma n an d ecologica l population s t o this material

. 

### A Baselin e Aquati c Ecolog y Risk Assessmen t (BAERA)

,

Californi a Gulch

, Leadville

, Colorad o (Ro y F

. Weston

, Inc

. [WESTON]

, 

### 1994 ) identifie s th e Site-wid e impac t o f min e wast e contaminatio n o n th e aquatic ecosystem s a t th e Site

. Th e BAERA provide s a conceptua l mode l o f Site-wid e exposur e fo r 

### aquatic receptors

. V

. Endangermen t

Determinatio n 

### Actua l and/o r threatene d release s o f hazardou s substance s fro m min e wast e roc k pile s in th e residentia l populate d areas , 

### i f no t addresse d b y implementin g th e Remova l Actio n selecte d 

### i n this Actio n Memorandum

, ma y presen t a n endangermen t t o publi c health

, o r welfare

, o r th e environment

.

### V I

. Propose d Actions/Performanc e

Standards/Estimate d

Cost s A

. Propose d Action s 

### A . I Th e min e wast e roc k wil l b e haule d directl y t o th e end use location

. A potentia l end use woul d b e t o 

### utiliz e th e min e wast e roc k materia l fo r capping/stabilizatio n

o f othe r contaminate d

area s on-site

. Also

, th e wast e ma y be used t o fil l in sin k hole s an d subside d min e shaft s whic h occasionall y appea r i n Leadvill e followin g 

### significan t stor m events

. EP A approve s thi s us e provide d th e contaminate d

materia l doe s no t com e 

### int o contac t wit h groundwate r an d tha t th e to p tw o fee t o f any backfil l activit y use s onl y material s 

### belo w th e 350 0 pp m actio n leve l fo r lead

. A . 2 Sinc e EP A ha s selecte d a 350 0 pp m lea d actio n leve l f o r th e min e wast e roc k pile s i n thi s Actio n 

### Memorandum

, Asarc o ma y remov e or leav e i n plac e pile s betwee n th e 200 0 pp m actio n leve l base d o n th e Min e Wast e Work Pla n an d Asarco' s WAM P (appendi x t o 

### th e consent decree ) an d th e 350 0 pp m actio n leve l f o r lea d selecte d i n thi s Actio n Memorandum

. Ever y 

### effor t wil l b e mad e t o accommodat e th e propert y owner' s preferenc e an d t o tak e int o account th e interes t o f th e Lak e Count y Histori c Preservatio n Advisor y Board

. 

### A . 3 Al l pile s wit h a lea d concentratio n

exceedin g 350 0 pp m lea d wil l be remove d wit h mitigatio n bein g 

### performe d a s specifie d b y SHPO

. A . 4 Stockpilin g o f min e wast e roc k wil l occur onl y t o 

### accommodat e extenuatin g circumstance s

an d woul d b e on a ver y limite d basi s i n term s o f tim e and 

### quantity

. 

### A . 5 A fugitiv e dus t monitorin g progra m wil l b e implemented

. 

### A . 6 I f direc t re-us e o f th e material s i s no t possibl e withi n tw o years , a suitabl e stockpil e are a wil l be identifie d an d developed

. Min e wast e roc k tha t exceed s th e actio n leve l (350 0 pp m lead ) wil l b e move d t o thi s stockpil e locatio n fo r long-ter m management

. 

### A . 7 Fo r wast e pile s tha t ar e removed

, confirmatio n 

### testin g a t th e base o f th e pile s wil l be used t o evaluat e soil-lea d concentration s

o f th e foot-print

. I f lea d concentration s

a t th e bas e o f a pil e ar e

### acceptable

, n o furthe r evaluatio n i s necessar y othe r tha n maintenanc e

o f vegetatio n unti l i t become s 

### established

. Remainin g wast e roc k o r pre-existin g soi l wit h lea d level s greate r tha n 350 0 pp m wil l b e 

### cappe d an d revegetated

. Ca p material s woul d be 

### obtaine d fro m a loca l borrow sourc e and/o r fro m min e wast e roc k pile s wit h lea d concentration s

belo w th e actio n level

. B

. Applicable

or Relevan t and 

### Appropriate Requirement

s (ARARs ) 

### ARARs ar e identifie d i n Appendi x F o f th e EE/CA

. The y wil l b e me t b y implementin g th e Performanc e Standard s identifie d i n Sectio n C

. 

### 1

. Chemica l Specifi c ARARs Chemical-specifi c

requirement

s ar e base d o n healt h o r risk-base d concentratio n

limit s o r discharg e limitation s

i n environmenta l

media (i.e

. 

### water , air ) fo r specifi c hazardou s chemicals

. Thes e ma y be used t o se t cleanu p level s fo r chemical s o f

concer n (in this case , metals) in th e designate d 

### media

, o r t o se t a saf e leve l o f discharg e (e.g

. wast e wate r discharge

, takin g int o account wate r qualit y standards ) wher e a discharg e occur s as par t
o f th e remova l activity

. 

### Potentia l Chemica l -Specifi c ARARS/TBC

s ar e show n o n 

### attache d Exhibit s 8 & 9, Table s 4. 1 an d 4. 2 o f th e EE/CA

.

2

. Actio n Specifi c ARARs - 

### Action-specifi c

ARARs ar e activity-base d requirement s triggere d b y th e particula r remova l 

### activitie s selected

. Regulation s

regardin g worke r 

### healt h an d safet y (i.e

. OSH A requirements ) ar e no t technicall y ARARs a s the y are not environmenta l

or 

### publi c healt h requirements

. Potentia l Action-Specifi c

ARARs ar e show n o n 

### attache d Exhibi t 10 , Tabl e 4. 4 o f th e EE/CA

. I n additio n t o th e Action-Specifi c

ARARs identifie d i n Exhibi t 10, Tabl e 4.4 , RCR A Subtitle C ma y b e 

### relevan t an d appropriat e i f th e waste s fai l Toxicit y Characteristi c Leachin g Procedur e (TCLP ) o r i f the y exhibit othe r characteristic s

o f a RCR A hazardou s

### waste

. Portion s o f RCR A Subtitle C tha t addres s lo w 

### permeabilit y cove r o f characteristi c

waste s an d provid e fo r th e continue d collectio n o f leachat e an d continue d runo n and runof f contro l ma y b e relevan t
an d appropriat e t o thi s Remova l Action

.
3

. Locatio n Specifi c ARARs - 

### Location-specifi c

ARARs ar e restriction s

place d o n 

### th e type s o f activitie s tha t ma y occur i n particula r 

### locations

. Th e locatio n o f th e wast e ma y b e a n importan t characteristi c

in determinin g it s impac t


### o n publi c healt h an d th e environment

; thus stat e 

### standard s ofte n establis h location-specifi c

ARARs

. Thes e ARARs ma y restric t o r preclud e certain 

### remedia l action s o r ma y appl y onl y t o certai n portion s o f a site

. Example s o f location-specifi c 

### ARARs includ e federa l an d stat e requirement

s fo r preservatio n o f histori c landmarks

, endangere d 

### specie s an d wetland s protectio n an d floodplai n restriction s o n management o f hazardou s waste

. F o r additiona l information

,

refe r to Tabl e F. I 

### attached

. Potentia l Location-Specifi c

ARARs ar e shown o n attache d Exhibi t 11 , Tabl e 4. 3 o f th e EE/CA

. 

### C

. Performanc e Standard s T h e ARARs ar e bein g me t throug h th e Performanc e Standards

. Performanc e

Standard s shal l b e attaine d consisten t wit h ARARs an d EP A approve d remova l action

. 

### T h e Performanc e Standard s ar e describe d below : 1

. The Remova l Actio n a s designe d and constructe d 

### shal l includ e provision s t o ensure tha t ther e ar e n o visibl e emission s (dust ) fro m th e min e wast e roc k 

### pile s in th e populate d residentia l area s durin g an d followin g construction

. 2

. Th e Remova l Actio n a s designe d an d constructe d shal l includ e provision s t o ensure tha t ther e i s n o erosio n o f the min e wast e roc k pile s o r sediment s due t o rai n or sno w melt

. 

### 3

. Th e desig n shal l contai n requirement

s t o ensure tha t erosion
, run-on, an d run-of f ar e prevente d an d t o ensure slop e stability

. Rain

, floo d an d sno w mel t shal l not b e allowe d t o run ont o o r fro m the

### tailing s area

. Al l slope s shal l b e grade d t o b e permanentl y stable

. 

### 4

. Contaminate d

materia l wil l be use d as fil l materia l onl y i f i t does not com e i n contac t wit h groundwater

. 5

. Th e to p tw o fee t o f an y fille d are a wil l hav e a lea d concentratio n no t exceedin g 350 0 pp m lead

. 

### 6

. Th e Remova l Actio n wil l be reviewe d b y SHP O an d prope r mitigatio n wil l b e designe d an d implemente d f o r an y advers e effect s o n cultura l resources

. 7

. A n ai r monitorin g progra m wil l b e implemente d t o 

### ensure fugitiv e dus t emission s ar e no t bein g release d fro m th e min e wast e roc k piles

. 8

. A long-ter m maintenanc e

progra m ma y b e implemented

, i f require d b y th e fina l RO D fo r O U 9, t o ensur e th e 

### long-ter m effectivenes s

o f thi s Remova l Action

. D

. Projec t Schedul e 

### T h e constructio n

o f thi s Remova l Actio n shal l b e complete d withi n tw o year s o f th e dat e o f thi s Actio n 

### Memorandum

. Upo n completio n o f constructio n

o f thi s 

### Remova l Actio n an d attainmen t o f th e Performanc e 

### Standards

, long-ter m maintenanc e

an d monitorin g wil l b e initiated

, i f necessary

. 

### I f direc t re-us e o f th e material s i s no t accomplishe d withi n tw o years , a suitabl e stockpil e are a wil l be identifie d an d develope d an d min e wast e roc k tha t exceed s th e actio n leve l (350 0 ppm ) wil l b e remove d t o thi s stockpil e locatio n fo r long-ter m management

. 

### E

. Estimate d Cost s Asarco' s estimate d cost fo r thi s Remova l Actio n i s $1,500,000

. VII

. Expecte d Chang e i n th e Situatio n Shoul d Actio n B e Delaye d o r 

### N o t Take n Shoul d this Remova l Actio n be delayed

, o r no t take n a t all

, 

### potentia l ris k o f exposur e t o heav y metal s containe d i n th e 

### min e wast e rock

, groundwate r an d surfac e wate r wil l continu e t o exist

.

### VIII

. Outstandin g Polic y Issue s 

### A Recor d o f Decisio n wil l be issue d fo r O U 9 o f th e Sit e selectin g th e fina l remedia l actio n includin g th e min e wast e 

### roc k pile s in th e residentia l populate d area

. I X

. Enforcemen t 

### Asarco

, Inc

. i s th e part y tha t has agree d t o implemen t respons e actions fo r th e O U 9 portion s o f th e Site

. X

. R e c ommend a t i o n Thi s decisio n documen t represent s th e selecte d Remova l Actio n 

### f o r a portio n o f OU 9 o f th e Californi a Gulc h Superfun d Site

, i n th e Cit y o f Leadville

, Count y o f Lake

, Stat e o f Colorado

. 

### I t was develope d i n accordanc e wit h CERCLA

, as amended

, an d i s no t inconsisten t

wit h th e NCP

. Thi s decisio n i s base d o n th e Administrativ e

Recor d fo r th e Site

. 

### Condition s i n th e residentia l populate d area s mee t th e NC P Sectio n 300.415(b)(2 )

criteri a fo r a remova l an d I recommend 

### approva l o f th e propose d remova l action

. APPROVA L

M a x H

. Dodso n 

### Assistan t Regiona l Administrato r Offic e o f Ecosystem s Protectio n and Remediatio n DISAPPROVA L

M a x H

. Dodso n 

### Assistan t Regiona l Administrato r Offic e o f Ecosystem s Protectio n and Remediatio n

1

0NOT JO SCALE 

### CALIFORNIA GULCH 

## SVPERFUNb SITE

664 OIOO KfSWLOC.DWG fsign

lly J.RAY ii» i fly

. K.COHR4TH RESURRECTIO N

MININ G COMPAN Y O N C UNITC O «ANI < CCNTC 1 I>0 0 IMC1X H (tnECI OtMVtH

. C<XOMAO O *OtB > .S'ru/ r

W 9 5 

## CALIFORNIA

GULCH SITE 

## GENERAL LOCATION EXfflBIT l 

## ,1.1E 1 •

r

- 5 ••

x

- Rfr-TUNNEt ^ ^

LEADVILL E DRAINAG E TUNNE L ;*

. .i* K ^h T

Stra y HOT M Gulc h Stor r Ditc h

CALIFORNI A GULCH

» / Y A K TUNNE L

^ ^ •CALIFORNI A GULC H



### Denver

, Colorad o TITL E 

### SIT

E LOCATION MA P CLIENT/PROJEC T DRAW N 

### ASARC O MIN E WAST E EE/C A R

B CHECKE D BE

S REVIEWED C A D OAT E DE C 199 5 SCALE A S SHOW N RL E NO

. 2819A04 5 

## EXHIBI

T 2 FIGUR E NO

. 

## 1- 1MIDA S s 

## GRA Y EAGLE

PGLAS S PENDER Y 

### i i v

MINERAL GROUP I MIN E WASTE

, PILE S MIN E WAST E PIL E WIT H Pb > 200 0 pp m MIN E WAST E PIL E WIT H Pb < 2000 pp m 40

0 SCAL E I N FEE T 

### iZ ! 80 0 160 0


### Denver

, Colorad o TTO E 

### MIN

E WAST E PLE S I N T H E POPULATE D ARE A 

# 9 CLIENT/PROJEC

T DRAW N 

### ASARC O MIN E WAST E EE/C A R

B CHECKE D A R C REVIEWE D C A D DAT E DE C 199 5 SCAL E 

## r=8oo

- 

# EXHmrr s FIL E no

. 2819A14 8

IF1GUR E NO

. 

### 3 - I

### TABL E 2. 1 SUMMAR Y OF MAXIMU M METAL S CONCENTRATION

S 

### MIN E WAST E PILE S

Min e Wast e Pile * 1 6

7 9
10 3
12 0

1 4 1
15 0
1 5 1
156

17 2

1 % I'enros c Minera l Grou p 4
2
3
5
4
4
4
5
2
4 n / a Sampl e Typ e S M C M W S MC M W S M C M W S M C M W S M C M W S MC M W S M C M W S M C M W S M C M W S MC M W S M C M W Antimony

Arseni c 25 5 94. 7

. 246 11 7 26 1 29 0 67. 0 73. 4 28 3 13 9 71. 3

„ 50 0

-' 8 9 3.2 72. 4 65. 9 14 7 14 1 27 6 57 8 Bariu m Berylliu m 6 4 49. 2 16 8 30 2 82. 8

- , 19 2 20 0 41 7 15 4

_ 3 0 - -'
„ . 7 6

_ 9 0 73 6 19 8

. 24 2 27 6 56 7 Cadmiu m

13 5 24 8 32.9 18. 5 59. 5

- 25. 5 13. 8 69. 2 57. 8 15. 4 23 0 52. 4 18 7 47. 1 5. 1 51. 5 48. 7 6 11 6 10 8 41 7 Chromiu

m

-

- 4. 1 3. 6 3. 5

-

- - 13. 2 4.8

-

-

-

' . . 13. 2

- 6. 5 5. 4 5. 6

- 20. 6 11. 1 7. 8 Coppe r 23 6 87. 6 17. 5 11. 6 33 2

- 58. 8 84. 9 11 6 11 7

- 28 0

- 82 7

- 8. 8 36. 1 12. 1

- 22. 5 78 2 43 3 Lea d 14.00 0 9,85 0 93 7 10,600 13,70 0 26,7(X ) 15.10 0 2,08 0 8,95 0 66,400 5,41 0 6,20 0 1,44 0 16,10 0 6,31 0 84. 6 4,01 0 7,27 0 7,25 0 2.13 0 9.36 0 40,70 0 Manganes e 6,18 0 50.200 4,52 0 3,28 0 2,97 0

- 4,24( ) 1,22 0 17,800 '" 1,73 0

- 8,89 0

- 4,79 0

- 25 9 10,40 0 3,48 0

- 1,36 0 12,90 0 10,100 Mercur

y 0.7 9 1. 0 1. 1 1. 5 0.8 8

- 4. 5 0.8 1 1. 4 0.6 2

- 0.6 4

- - 0.3 6

-

- 1. 7 1. 0

- 0. 9 1. 9

- - Nicke l

Silve r

11. 0 10. 2 6. 8 74. 5

4 3 3

.

- 13. 2

. 65.7

- 7. 6 14. 5

-

-

. 12. 6 41. 7

Thalliu m 2. 3

- 1. 9 1 0

- -

- 1. 3 1. 5

-

-

- 1. 3

- 3. 7 4. 1 3. 2 /in c 16,90 0 57.10 0 16.901 ) 5,68 0 '11,10 0 32,00 0 4,040 2,00 0 9,74 0 9,35 0 2,81 0 25.80 0 10.30 0 7.81 0 6,94 0 99 8 11,70 0 7,80 0 87 0 II.51K ) 14,20 0 48,800 

### A l l unit s i n ing/k g 

### S M C
= Surfac e mine wast e composit e sample s M W = Subsurfac e mine wast e sample s F S

- Foundatio n soil s sample s

— No t detecte d o r no t analyze d



## EXHIBI

T 4

### 3 8 MIN E WAST E 

### PILE S I N RESIDENTIA L ARE A



### 3 0 CATEGOR Y 2 + , 3 PILE S AN D 1 CATEGOR Y 1 PILE RESIDENTIA L ARE A



### SAMPLIN G A N D ANALYSI S F OR TOTA L LEA D



### N O REMOVAL/REMEDIA

L ACTION ON PILES UNTI L COMPLETIO N O F RO D (INCLUDIN G N O ACTIO N 

### ALTERNATIVE ) O R MA Y B E USE D ELSEWHER E 

### O N SIT E ADDITIONA L GEOCHEMICA L A N D GEOTECHNICA L INVESTIGATIO N O N BUL K SAMPLES

IDENTIFICATIO N A N D EVALUATION OF REMEDIAL/REMOVA

L ALTERNATIVE S



# 5 *

-r i 

### ASSOCialE

S Denver

, Colorad o TITL E 

### M N

E WAST E EE/C A FLO W CHAR T CLIENT/PROJEC T DRAW N 

### ASARC O M N E WAST E EE/C A RB

A R C REVIEWED C A

D OAT £ DE C 199 5 SCALE N T

S RL E NO

. 2819A14 7 

## EXHIBIT

S FIGUR E NO

. 

### 3- 2TABL E 3. 2 SUMMAR Y TABL E

Til e Pil e Mineralogy

Estimate d Soi l Lea d Numbe r Nam e Grou p Class

. Volum e Conten t 0 " t o 2 " (cyds ) (ppm) 1 2 13 1 4 15 1 6 1 7 1 8 1 9 2 0 2 2 2 3 2 4 2 6 2 7 2 8 31 3 2 3 3 3 4 3 5 3 6 10 8 10 9 11 0 1 1 1 14 0 20 7 32 9 33 1 33 9 34 0 Corando/Norther n I-slc y llihschl e Ilibschl u Coronad o Coronado/Noriher n Coronad o Wolcol t Mida s Gra y Eagle/Biso n Kent/Cresen t Ken t Pocahonta s Starr/Laz y Bil l Stai r

. Pocahoiuas/Pender

y Pocahontas / Weldo n # 1 Weldon/Weldo n # 2 Bol m Midlan d Glas s Pender y T u t ho t Hope/Las t Chi p Luzein e Ypilanti Ypsilanti/Ypsilanl i B Boli n D o n Ai r Aetn a P.O.S

. P.O.S

. 5 2 2 3 4 3 2 2 2 2 3 3 2 2 2 3 2 2 2 1 2 2 2 2 2 2 2 2 2 2 2 19,60 0 70 0 5,600 2,700 16,60 0 3,30 0 10,50 0 8,80 0 28,50 0 12,000 50 0 30 0 5,80 0 , 9,20 0 16,30 0 20 0 10,20 0 39,90 0 9,20 0 8,350 2,60 0 2,30 0 6,80 0 

### iso 20 0 2,80 0 80 0 33,30 0 8,900 7,400 12,20 0 154 0 315 0 2230 0 1940 0 9240 420 0 237 0 2070 0 2680 531 0 117 0 422 0 14100 3380 1070 0 34 9 212 0 236 0 56 8 334 0 107 0 622 0 2770 0 480 0 627 0 570 0 321 0 1730 72 3 156 0 225 0 N e t Aci d Neutralizin g Potentia l (Tons/KT ) n / a 32 0 112. 4 201. 8 235. 6 414. 8 126. 4 -0.6 24. 7 89. 6 n / a 22. 3 219. 4 379. 3 610. 1 n / a 526. 2 424. 1 n / a 547. 9 n / a 410. 6 163. 4 132. 7 485. 4 301. 8 163. 1 n / a n / a n / a 558. 5 ANP/AG P Rati o n / a n / a 6. 4 10. 5 5. 3 25. 1 20. 3 1 7. 6 11. 6 n / a 5. 8 8. 2 26. 8 103. 7 n/ a 188. 1 72. 4 n / a 176. 3 n / a 120. 4 3 0 425. 6 46. 7 4 3' 174. 9 n / a n / a n / a 224. 4 Metho d 131 2 (Pass/Fail ) n / a PAS S PAS S PAS S PAS S PAS S PAS S PAS S PAS S PAS S n / a PAS S PAS S PAS S PAS S n/ a PAS S PAS S n / a PAS S n / a PAS S PAS S PAS S PAS S PAS S PAS S n / a n / a n / a PAS S Assume d 

### use s Classificatio n Descriptio n
S M S M S M S M S M S M S M S M S M M L S M S M S M M L M L S M S M S M S M S M S M

S M Sand y sil t Sand y sil t Sand y sil t Sand y sil t Sand y silt Sand y sil t Sand y sil t Sand y sil t Sand y sil t Sil t Sand y sil t Sand y sil t Sand y sil t Sil l Sil t Sand y sil t Sandy silt Sand y sil t Sand y sil t Sand y sil t Sand y silt

Sand y sil t 

## EXHIBI T 6

### TABL E 7. 2 CULTURA L RESOURC E MANAGEMEN T SUMMAR Y Pile No

. - Nam e 

### (Smithsonia n Sit e Number ) MW P 13 - Este y (5LK867 ) 

### MW P 16 , 17
, 18 - Coronad o (5LK868 )


### MW P 2 0 - Midas (5LK869 ) MW P 2 2 - Gra y Eagl e (5LK870 ) 

### MW P 24 - Kent (5LK871 ) 

### MW P 3 2 - Pocohonta s (5LK872 ) MW P 33 - Weldo n (5LK873 ) 

### MW P 3 5 - Midlan d (5LK874 ) MW P 10 8 - Turbo t (5LK875 ) 

### MW P 14 0 - Ypsilant i (5LK876 ) MW P 34 0 - P.O.S

. (5LK877 ) 

### Eligibilit y N o t Eligibl e Eligible

, bot h Individuall y and a s
a contributin g elemen t o f th e 

### Leadvill e Historic District (5LK856 ) 

### Eligibl e onl y a s a contributin g elemen t o f the Leadvill e Historic District (5LK856 ) N o t Eligibl e 

### N o t Eligibl e N o t Eligibl e Eligibl e onl y a s a contributin g elemen t o f the Leadvill e Historic District (5LK856 ) 

### N o t Eligibl e N o t Eligibl e N o t Eligibl e Eligibl e onl y a s a contributin g elemen t o f th e Leadvill e Histori c Distric t (5LK856 ) Distric t

Statu s N o t Contributin g 

### Contributin g
Contributin g N o t Contributin g N o t Contributin g N o t Contributin g Contributin g N o t Contributin g N o t Contributin g N o t Contributin g Contributin g



### Note : Th e above tabl e include s onl y "Sites"

, no t "Isolate d Finds. " Al l isolate d find s a t th e Min e Wast e Pile s surveyed wer e determine d t o be No t Eligibl e an d No t Contributin g 

### Source : FEC

. 1995

.



## EXHIBIT

?

### TABL E 4. 1 

# -'SUMMARY O F POTENTIA L CHEMICAL-SPECIFI C ARARs/TBCS CALIFORNI A GULCH SUPERFUN D SIT E

Standard

, Requirement

, o r Crileri a Descriptio n Commen t Clea n Wate r Ac t (3 3 US C Sect

. 1351-1376 ) Ambien t Wate r Qualit y Criteri a (4 0 CF R Par t 131 ; Qualit y Criteri a fo r Water

, 1976
, 1980 , 1986 , 1987 ; Ambien t Wate r Qualit y Criteri a f o r Selenium

, 1987 ) Clea n Ai r Ac t (-1 2 US C Sect

. 7401-7642 ) Nationa l Ambien t Ai r Qualit y Standard s C F R Pa n 50 ) (4 0 Nationa l Emission s Standard s fo r Hazardou s Ai r Pollutant s (4 0 CF R Par t 61) Saf e Drinkin g Wate r Ac t (4 2 U.S.C

. 300 )
Undergroun d Minin g Genera l Performanc e Standard s (3 0 CF R Par t 717 ) Requires EP A and state s t o establis h ambien t water qualit y contro l criteria (AWQC ) an d standards

, respectively

, fo r surfac e wate r base d on use classification s
an d th e criteri a state d unde r Section s 304(a )

and 30 3 o f the Clea n Wate r Act

. Establishe s ambient ai r qualit y standard s fo r certai n "criteri a pollutants " t o protec t publi c healt h an d welfare

. Establishe s emissio n standard s fo r certain industria l pollutant s an d sources

. Establishe s regulations t o protec t huma n healt h fro m contaminant s in drinkin g wate r a n d establishe s nationa l drinkin g wate r standard s Establishe s minimu m environmenta l protectio n performanc e standard s fo r undergroun d minin g activities._______

_ Federa l

freshwate r AWQC s ma y b e "relevan t an d appropriate " i f contaminant s ar e release d t o sit e surfac e water s o r i f treate d groundwale r i s discharge d t o a surfac e water

. Colorad o ha s it s ow n stat e wate r qualit y standard s which coul d b e considere d "applicable, " wher e the y ar e mor e stringen t tha n th e federa l standards

. Applicabl e i f an y criteri a pollutan t i s emitte d t o th e atmospher e durin g remedia l actio n operation s fro m a majo r source

. Woul d onl y b e a n ARA R i f th e remedia l actio n involve s a specifi c industria l category fo r whic h NESHAP s ha s been establishe d



### Modifie d Fro m EP A (1993 )



## EXHIBIT

S

Colde r Associate s

### TABLE 4. 2 POTENTIA L CHEMICAL-SPECIFI

C ARARs/TBC s 

### FEDERA L SURFAC E WATE R QUALIT Y STANDARD S CALIFORNI A GULC H SUPERFUN D SIT E

: : 

### : - : 

### : x : 

### Paramete r •^mm*' S u l fat e A p H F

P Temperatur e F

P Tota l Dissolve d Solid s I Aluminu m M Antimon y M Arseni c Cadmiu m Chromiu m

.

M Chromiu m II I' • M Chromiu m V I M Coppe r M Cyanid e Iro n Lea d Manganes e M Mercur y Nicke l M Seleniu m M Silve r M Thalliu m Zin c 6.5-9 S S S

S S S S 75 0 8

7 9,00 0 1,60 0 3.9(2 ) 1.1(2

) 1,700(2 ) 210(2

) 1 6 1 1 18(2 ) 12(2

) 2 2 5. 2

1,00 0 82(2 ) 3.2(2

)
2. 4 0.01 2 1,400(2 ) 160(2

) 20(b ) 5(b

) 4.1(2 ) 0.1

2 1,400(2 ) 40(2

) 120(2 ) 110(2

) 

### i^M^8^^ra^@^lffi^WP.M

K ^^^m^:m^^sms^j^^-^^s^w^m^^^ lli;:;jS/aiier;:arJ d j '.feigfell l f e : Fis B ;fcqhsMifljjiitiij|iij | f IfiPlnp^bfi f iW f : l :>;: : 1 : >; : !:::;; I^On1y <:;;;! filPP ; i

250,00 0 14 6 45,00 0 0.002 2 0.017

5 1 0 170,00 0 3,433,00 0 5 0
20 0 30 0 5 0 10

0 5 0 0.14 6 0.14 4 10 0 13. 4 1 0 5 0 1 3 4

8 Explanalio n o f Tabl e AWQ C Ambien t Wate r Qualit y Criteri a CVV A Clea n Wale r Ac t S S Specie s

Specifi c Hg/ o microgram s

pe r lite r ( 1 ) Typ e

abbreviation s are : A = Anion ; 1 = Indicator ; F P = Fiel d parameter ; M = Meta l ( 2 ) Hardnes s

dependen t criteria ; valu e se l a t hardness o f 10 0 mg/ L CaCo

3 ( a ) EPA

, Qualit y Criteri a fo r Protectio n o f Aquati c Life

, 1986 ( b ) EPA

, Nationa l Ambien t Wate r Qualit y Criteri a fo r Seleniu m - 198 7 hor n EP A 199 3 

## EXHIBI T 9 Golde r Associate s

### TABL E 4. 4 POTENTIA L ACTION-SPECIFI

C ARAR s CALIFORNI A GULC H SUPERFUN D SIT E Standard

, Requirement

, Criteria

, o r Limitatio n Citatio n Descriptio n Commen t FEDERAL Clea n Ai r Ac t N e w Sourc e Performanc e Standard s Soli d Wast e Disposa l Ac t (SWD A a s amende d b y th e Resourc e Conservatio n
a n d Recover y Ac t o f 197 6 (RCRA ) Ma/ardou s Material s Transportatio n A c t Hazardou s Material s Transportatio n Regulation s

Occupationa l Safet y an d Healt h Ac t Federa l Min e Safet y an d Healt h Ac t STAT E Stal e Soli d Wast e Disposa l Site s an d Facilitie s Ac t CR S 30-20-10 1 t o 11 8 Colorad o Soli d Waste Managemen t Regulation s 4 2

US C Sect

. 7401

- 764 2 4 0 CF R 6 0

42 US C Sect

. 6901

- 698 7
4 9 US C Sect

. 1801

- 181 3 4 9 CF R Part s 107
, 17M7 7 Establishe s

emission standard s fo r certai n categorie s o f industria l stationar y sources

.

Regulate s transportatio n o f hazardou s materials

.

2 9 US C Sect

. 651-678 Regulate s worker healt h an d safety

. 3 0 US C Sect

. 800-96 2 Establishe s requirement s t o protec t worke r healt h and safety

. 6CC R 1007- 2 Establishe s polic y fo r licensing

, locating

, constructin g an d operatin g o f soli d wast e facilities

. Onl y applicabl e i f a remedia l actio n create s ai r emission s regulate d b y thes e standards

.

Applicabl e i f th e remedia l actio n involve s off

sit e transportatio n o f hazardou s materials

. Th e regulation s affectin g packaging

, labeling

, marking

, placarding

, usin g prope r containers
, a n d reportin g discharge s o f hazardou s material s woul d b e potentia l ARARs

. Applicabl e fo r al l remedia l action s unde r th e

. NCP

. Applicabl e fo r al l remedia l action s unde r th e N C P conducte d i n an d aroun d mines

. Applicabl e i f remedia l activitie s involv e disposa l o f soli d wast e materials

. Permit s ar e
n o t require d fo r on-sil e activitie s a t a sit e liste d

o n th e NPL

. 

## EXHIBI T 1 0
Modifie d Em m EP A IW 3 Golde r Associate s

### TABLE 4. 4 

### (Concluded ) Standard

, Requirement

, Criteria

, o r Limitatio n Citatio n Descriptio n Commen t Colorad o Mine d Lan d Reclamatio n Ac t Minera l Rule s an d Regulation s

Colorad o Ai r Qualit y Contro l Ac t Colorad o Nois e Abatemen t Ac t Miscellaneou s Regulation s o n the Collectio n o f Aquati c Lif e CR

S 34-32-10 1 t o 12 5 2CC R 407- 1

5CC R 1001-1, 3,4 , 5 , 8 , 10 CR S 25-12-10 1 t o 10 8
2CC R 406-8 , Ch

. 13 , Articl e HI ; Sectio n 131 6 Regulate s

al l aspect s o f lan d us e fo r mining
, includin g th e locatio n o f minin g operations and relate d reclamatio n activitie s and othe r environmenta l and socio-economi c impacts

. Establishe s emission s standard s fo r P M 1 0 an d lead

. Establishe s maximum permissibl e nois e level s fo r particula r tim e period s an d land us e zones

. Requirement s governmen t the collectio n o f wildlif e fo r scientifi c purposes

. M a

y be relevan t an d appropriate t o remedia l activitie s involvin g drilling

, wate r contro l
measures , an d treatmen t an d disposa l o f wast e piles

. Permit no t require d fo r CERCL A sites

. Applicable i f th e remedia l actio n create s emission s o f regulate d materials

. Relevan t an d appropriat e t o remedia l activitie s involvin g constructio n activities

. Applicabl e i f remedial activitie s trigge r th e
need fo r biologica l monitoring

.

Modifie d l-roi n lil' A 199 3 Colde r Associate s

### TABL E 4. 3 SUMMAR Y OF POTENTIA L LOCATION-SPECIFI

C ARAR s CALIFORNI A GULC H SUPERFUN D SIT E
Requiremen t Potentiall y Applicabl e Potentiall y Relevan t an d Appropriat e Comment

s Location-Specifi c Laws/Requirement

s FEDERA L REGULATION S E.O

. 1198 8 Protectio n o f Floodplain s 1

. Limit s activitie s in floodplains

. Floodplai n i s define d a s "th e Ye s lowlan d an d relativel y fla t area s adjoinin g inlan d an d coasta l water s includin g floo d pron e area s o f off-shor e islands

, including a t a minimum
, tha t are a subjec t t o a one percen t or greate r chanc e o f floodin g in an y give n year. " Federa l agencies must evaluat e th e potentia l effects o f action s take n i n a floodplai n an d avoi d advers e impact s fro m remedia l activitie s | 4 0 CF R 6.30 2 an d Appendi x A ] E.O

. 1199 0 Protectio n o f Wetland s 2

. Minimize s advers e impact s o n area s designate d a s wetlands

. [4 0 Yes C F R 6.302(a ) an d Appendi x A ]
Clea n Wate r Ac t Sectio n 40 4 3

. Regulate s th e discharg e o f dredge d o r fil l materia l int o waters o f Ye s U.S

. Consultatio n wit h th e Regiona l Respons e Tea m required

. 1 3 3 US C 1251 , e t seq; 4 0 CF R 230 , 231 ; 3 3 CF R 320-330 ]

4

. Require s federa l agencie s t o avoid

, t o th e exten t possible

, Ye s advers e impact s associate d wit h destructio n o r los s o f wetland s Portion s o f Californi a Gulc h li e withi n a 100-yea r floodplain

. I f remedia l activitie s ar e conducte d withi n th e floodplain

, thi s regulatio n wil l b e applicable

.

Wetland s ar e presen t alon g portion s o f Californi a Gulc h an d th e Arkansa s River

. Regulation s ar e applicable onl y i f remedia l activitie s impac t th e wetland s areas

. Dredg e an d fil l substantiv e requirement s wil l appl y i f Oregon Gulch

, Stra y Hors e Gulch

, Malt a Gulch

, Californi a Gulc h (i f determine d t o b e "water s o f th e Unite d States") o r (h e Arkansa s Rive r receiv e fil l materia l fro m remedia l activities

. Wetland s occur alon g Californi a Gulc h an d th e Arkansa s River ; regulation s woul d b e applicable onl y i f th e remedia l activitie s impac t th e wetland s areas

. 

## EXHIBI T 1 1 Modifie d Fro m lil' A 199 3 Colde r Associate s

### TABL E 4. 3 

### (Continued ) Requiremen t Potentiall y Potentiall y Relevan t an d Applicabl e Appropriate Comment s Endangere d Specie s Ac t 5

. Protect s endangere d specie s an d threatene d specie s an d preserve s thei r habitat

. Require s coordinatio n wit h federa l agencie s fo r mitigatio n o f impacts

. |1 6 US C 153 1 e t sequence ; 5 0 CF R 200 , 5 0 CF R 402 | Fis h an d Wildlif e Coordinatio n Ac t 6

. Require s coordinatio n wit h federa l an d stat e agencie s o n activitie s affecting/modifyin g streams o r river s i f th e activit y ha s
a negativ e impac t o n fis h o r wildlife

. [1 6 US C 66 1 e t seq. ; 4 0 C F R 6.302(g) j Rivers an d Harbor s Ac t o f 1899; Sectio n 1 0 7

. Sectio n 1 0 permi t require d for structure s or wor k i n or affectin g navigabl e waters

. [3 3 US C 403 , 3 3 CF R 320-330 ] Nationa l Histori c Preservatio n Ac t (NHPA ) 8

. Require s die preservatio n o f histori c propertie s include d in o r eligible lo r th e Nationa l Registe r o f Histori c Place s an d t o minimiz e har m t o Nationa l Histori c Landmarks

. [ 1 6 US C 47 0

e t seq. ; 4 0 CF R 6.301(b) ; 3 6 CF R Par t 63, Par t 65 , Par t 800 ]

T h e Histori c an d Archeologica l Dat a Preservatio n Ac t o f 197 4 9

. Establishe s procedure s t o provid e fo r preservatio n o f historica l

a n d archeologica l dat a which migh t b e destroye d throug h alteratio n o f terrai n a s a resul t o f a federa l constructio n projec t

o r a federall y license d activit y program

. [1 6 US C 469 ; 4 0 CF R 6.30l(c) | E.G

. 1159 3 Protectio n an d Enhancemen t o f th e Cultura l Environmen t 1 0

. Federa l agencie s directe d t o institut e procedure s t o ensur e program s contribute t o th e preservatio n an d enhancemen t o f

n u n lederall y owned histori c resources

. Consultatio n wit h th e Advisor y Counci l o n Histori c Preservatio n required

. |1 6 US C -170 | Modifie d Fro m FI' A |<W 3 Unknow n

Y e s

N o Y e s

Y e s

Y e s I

f ther e ar e T/ E specie s o r critica l habitat s withi n t h e area s impacte d b y th e remedia l activities
, thi s regulatio n woul d b e applicable

. I f Californi a Gulc h o r th e Arkansa s Rive r an d adjoining stream s wil l b e impacte d b y remedia l activities
, this regulatio n woul d b e applicable

. Arkansa s River no t considere d a "navigabl e river. "
Thi s Ac t i s applicable a s Californi a Gulc h lie s withi n th e Leadvill e Nationa l Histori c Landmar k District

. A Programmati c Agreemen t has bee n entere d int o betwee n th e EPA

, th e Advisor y Counci l

o n Histori c Preservation

, an d th e Colorad o Slat e Histori c Preservatio n Office r i n accordanc e wit h Sectio n 10 6 an d 110( 0 o f NHPA

. Remedia l activitie s ma y affec t historica l and/o r archeologica l dat a a t th e Superfun d site

. A cultura l

resource s surve y wa s performe d t o identif y an d evaluat e al l histori c propertie s whic h ma y b e affecte d b y remedia l activitie s o n th e min e wast e pile s i n OU-9

. Se e # 8 above

.

Colde r Associate s

### TABL E 4. 3 

### / (Continued )
Requiremen t Potentiall y Applicable

Potentiall

y Relevan t and Appropriate Comment s T h e Archeologica l Resources Protectio n Ac t o f 197 9 1 1

. Require s a permi t fo r an y excavatio n o r remova l o r archeologica l resources fro m publi c land s o r India n lands

. [1 6 D S C 470aa-470ll ] T h e Histori c Sile s Ac t o f 193 5 1 2

. Enable s th e Nationa l Par k Servic e t o preserv e histori c resource s f o r publi c use

. 11 6 US C 461-467 ] Wildernes s Ac t 1 3

. Limits aciivitie s withi n area s designe d as wildernes s area s o r Nationa l Wildlif e Refug e Systems

. [1 6 US C 1311 , 1 6 US C 668; 5 0 CF R 53 , 5 0 CF R 27 ] Wil d & Sceni c River s Ac t 14

. Protect s river s tha t ar e designe d as wild

, scenic
, o r recreational

. [ 1 6 US C 1271 ; 4 0 CF R 6.302(e.)] Resource Conservatio n an d Recover y Ac t (RCRA)

, Subtitl e D 1 5

. Facilitie s wher e treatment , storage , o r disposa l o f soli d wast e wil l b e conducte d must mee t certai n locatio n standards

. Thes e includ e locatio n restriction s o n proximit y t o airports
, floodplains

, wetlands

, fault areas , seismi c impac t zones , an d unstabl e areas |4 0 CF R 258.10-15]

. STAT E REGULATION S Colorad o Historical

, Prehisioriea l an d Archeologica l Resource s Ac t 1 6

. Establishe s procedure s an d requires a permi t fo r investigation
, excavation
, gathering

, o r removal fro m th e natura l stat e o f an y historical

, prehistorical

, o r archeologica l resources o n stal e land s fo r th e benefi t o f recognize d scientifi c o r educationa l institutions

. Als o require s a n excavatio n permi t an d notificatio n i f huma n remain s ar e foun d o n stat e land

. [Colorad o Revise d Statutes

, Titl e 24 , Articl e 80 , Section s 401-411 ) Registe r o f Histori c Place s 1 7

. Establishe s requirement s fo r protectin g propertie s o f historica l significance

. (Colorad o Revise d Statutes

, Titl e 24 , Article 80 , Section s I()l-K)8 | Modifie d Fro m EP A 199 3 N o

N o

N o

N o N o

N o Y e s

N o

N o

N o Y e s

Unknow n

Unknow n Colde r Associate s M a

y be relevan t an d appropriate i f an y remedia l activit y involve s remova l o r archeologica l

resources ; substantiv e requirement s need t o b e met

. M a y be "t o be considered " i f remedia l activitie s impac t area s eligibl e fo r inclusio n i n th e Nationa l Registe r o f Histori c Places

. T h e sit e i s no t withi n a federally-owne d area designe d as^ a wildernes s are a o r a Nationa l Wildlif e Refug e System

. T h e Arkansa s Rive r i s no t liste d a s a Wil d an d Sceni c River

. Applicabl e i f interi m storage , treatment , an d disposa l is conducte d a s par t o f th e Californi a Gulc h remedia l action

.

M ay b e relevan t an d appropriate i f archeologica l
resources are removed or huma n remain s discovere d durin g remedia l activities ; coordinatio n wit h stat e archeologis t required

, bu t n o permi t neede d fo r Superfun d site

.
M ay b e applicabl e i f remedia l action s impac t an y propert y liste d o n th e Registe r o f Histori c Places

.

### TABLE 4. 3 

### (Continue d Requiremen t Potentiall y Applicabl e Potentiall y Relevan t and Appropriate Comment s Colorad o Nongame

, Endangered

, o r Threatene d Specie s Ac t (CR S 33-2-10 3 throug h 108 , 1984 ) 18

. Protect s endangere d an d threatene d specie s an d preserve s their habitats

. Requires coordinatio n wit h th e Divisio n o f Wildlif e i f remedia l activitie s impac t o n slate-liste d endangered/threatene d specie s o r thei r habitat

. [Colorad o Revise d Statutes

, Titl e 33 , Articl e 2 , Section s 101-1081

. Colorad o Specie s o f Specia l Concer n an d Specie s o f Undetermine d Statu s 1 9

. -Protect s animal s liste d o n th e Colorad o Divisio n o f Wildlif e generate d list

. Coordinatio n wit h th e Divisio n o f Wildlif e is strongl y urged

, i f anima l specie s ar e t o b e impacted

. [Colorad o Div

. o f Wildlif e Administrativ e Directiv e E-l

, 1985 , modified ]

Colorad o Natura l Area s 2 0

. Th e Colorad o Natura l Area s Progra m maintain s a lis t o f plan t specie s o f specia l concer n fo r th e State

. Althoug h no t protecte d b y Slat e statute , coordinatio n wit h Divisio n o f Park s an d Outdoo r Recreatio n is recommende d i f activitie s wil l impac t liste d species

. [Colorad o Revise d Statutes

, Titl e 33 , Articl e 33 , Sectio n 104 |

Stal e Soli d Wast e Disposa l Site s an d Facilitie s Act

, Colorad o Revise d Statutes

, Titl e 30 , Articl e 20 , Section s 101-118

. 2 1

. Establishe s regulation s fo r soli d wast e managemen t facilities

, includin g locatio n standards

. [ 6 CC R 1007-2 ) Unknown

N o

N o

Y e s I

f specie s o n th e Stat e T/ E lis t o r thei r habitat s ar e foun d i n area s tha t wil l b e impacte d b y remedia l activities
, th e regulation s wil l b e applicable

. A T/ E

surve y o f th e Californi a Gulc h sit e wa s conducted

, and conclude d tha t ther e i s no evidenc e tha t an y liste d specie s inhabi t th e site

. Unknow n I f remedia l activitie s impac t anima l specie s liste d a s specia l concer n o r o f undetermine d status , this directiv e woul d b e "t o b e considered " and coordinatio n wit h th e Divisio n o f Wildlif e recommended

, eve n thoug h ther e i s n o statutor y authority

. A surve y o f potentia l specie s o f specia l

concern was conducte d as par t o f th e TEE

, an d conclude d tha t ther e i s n o evidenc e o f anima l specie s o f specia l concer n a t th e sile

. Unknow n I f plant s o n th e lis t o f Plan t Specie s o f Specia l Concer n ar e foun d i n the area s impacte d b y remedia l activities
, thi s progra m woul d be "t o be considered " an d coordinatio n wit h Colorado' s Divisio n o f Park s and Outdoo r Recreatio n woul d b e necessary

. A surve y o f potentia l plan t specie s o f specia l concern was conducted

, an d conclude d tha t ther e i s n o evidenc e o f plan t specie s o f specia l

concer n a t th e site

. Y e s Applicabl e

i f remedia l activitie s involv e Hi e disposa l

o f solid wast e materials

. Permit s ar e no t require d f o r onsit e activitie s a t a sit e liste d o n th e NPL

. Modifie d rioi n I-PA 199 3 Colde r Associate s

### TABL E 4. 3 (Concluded ) Potentiall y Potentiall y Relevant an d _______________Requirement__________________Applicabl e Appropriate_____________Comments_________

_ Colorad o Wildlif e Ac t' 2 2

. Establislle s provision s governin g th e taking

, possession
, an d us e N o N o Remedia l action s bein g considere d wil l no t involv e o f wildlif e an d migratory birds

. [Colorad o Revise d Statutes

, any taking

, possession
, o r us e o f wildlif e an d Tid e 33 , Arlicle I

, Section s 101-12 0 migrator y birds

.

Mudilic d l-roi n HI' A IW. l Colde r Associate s