.Union Pacifi c Railroad 

# Request for Certification of Closure California Gulch Superfund Site 

# OU3 Februar y 25,199 9

Submitte d to : Unite d State s EP A Regio n VII I 99918 * Stree t Denver

, Colorad o 8020 3 Prepare d for : Unio n Pacifi c Railroad Compan y 141 6 Dodg e Stree t Omaha

, Nebrask a 6817 9

Environmental Resource s Managemen t 595 0 Sout h Willo w Drive

, Suit e 20 0 Greenwoo d Village
, Colorad o 8011 1 (303 ) 741-505 0 (303 ) 773-262 4 (fax ) 

# ER MUnio n Pacific Railroa d 

# Request for Certification of 

# Closure California Gulch Superfund Site OU3 Februar y 25,199 9



# c
. Te d C

. Bore r Principal

Peter R

. Bierbaum

, P. E Project Manager

Environmenta l Resource s Managemen t 595 0 Sout h Willo w Drive

, Suit e 20 0 Greenwoo d Village
, Colorad o 8011 1 (303 ) 741-505 0 (303 ) 773-262 4 (fax )TABL

E O F CONTENTS
1.0 INTRODUCTION

1 1. 1 SIT E OVERVIE W 1 1. 2 PURPOSE 2 1.3 SCOPE 2 2.0 DESCRIPTION

OF WORK PERFORMED 4 2.1 SLAG PILE INVESTIGATIONS

4 2 . 2 ARKANSA

S VALLEY (AV ) SLA G PIL E 7 

### 2.2. 1 History 7 2.2. 2 Remedial Action 8 2.3 LA PLATA SLAG PILE 9 

### 2.3.1 History 9 2.3.2 Remedial Action 9 2.4 HARRISON STREET SLAG PILE 10 

### 2.4.1 History 10 2.4.2 Remedial Action 10 2.5 MIDDLE AND UPPER EVANS GULCH SLAG PILES (EXCLUDING THE ELGIN SMELTER PILES) 11 

### 2.5.1 History 11 2.5.2 Remedial Action 12 2.6 GEORGIA GULCH (GG) SLAG PILE 12 2.6.1 History 12 

### 2.6.2 Remedial Action 13 2.7 LOWER EVANS GULCH SLAG PILE 13 2.7.1 History 13 

### 2.7.2 Remedial Action 13 2.8 ZINC SLAG PILE 14 

### 2.8.1 History 14 2.8.2 Remedial Action 14 2. 9 KAILYARD

1 4 

### 2.9. 2 History 1 4 2.9.2 Remedial Action 152.10

RAI L EASEMENT 1 5 

### 2.10.1 Description 15 

### 2.10.2 Remedial Action 16 3. 0 SUMMAR Y 1 7 4. 0 CERTIFICATION

1 9 5. 0 REFERENCES

20 LIST OF APPENDICES 

### Appendix A Work Plan: Harrison Street Slag Pile Closure 

### Appendix B EPA Approval Letter: Harrison Street Slag Pile Closure Work Plan Appendix C Verification Report: Consolidation of Fine Slag, Railyard 

### Appendix D Deed Restriction: Former location of Harrison Street Slag Pile and Adjacent Area 

### Appendix E Work Plan: Consolidation of Fine Slag, Railroad Easement Appendix F EPA Approval Letter: Work Plan for the Consolidation of Fine Slag, Railroad Easement 

### Appendix G EPA Approval Letters: Completion of Work, Consolidation of Fine Slag, Railroad Easement 

### Appendix H Memorandum of Understanding Between Union Pacific Railroad, Lake 

### County, and the US EPA on the Mineral Belt Trail Project1.0 INTRODUCTION T h e Unite d State s Environmenta l Protectio n Agenc y (EPA ) an d th e Denve r an d Ri o Gran d Wester n Railroa d Company (D&RG ) entere d int o a n Administrativ e Order o n Consen t o n December 3,199 1 whic h require d D&R G t o perfor m remedia l investigation s o f th e seve n majo r lea d sla g pile s an d on e zin c sla g pil e within th e Californi a Gulc h Superfun d Sit e (Site)

. Followin g th e submitta l o f thes e remedia l investigations , EP A an d D&R G entere d int o a Consen t Decree o n Septembe r 15,199 3 fo r th e completio n o f investigatio n an d remediatio n activitie s t o be performe d fo r the Operabl e Uni t 3 (OU3 ) area s o f the Site

. OU 3 area s consist o f thre e sla g pile s purchase d b y D&R G (Arkansa s Valley
, L a Plata

, an d Harriso n Street)

, th e D&R G railroa d easement whic h run s diagonall y through th e Cit y o f Leadville

, th e D&RG-owne d portio n o f th e railyard
, an d th e propert y adjacen t t o th e Harriso n Stree t sla g pil e (locatio n o f th e forme r Harriso n Stree t Reductio n Works)

. A s a resul t o f th e purchas e o f th e Souther n Pacifi c Transportatio n Company

, th e forme r D&R G i s no w owne d b y Unio n Pacifi c Railroa d Compan y (UPRR)

. UPR R ha s complete d D&RG' s responsibilit y unde r th e Consen t Decree fo r th e OU 3 area s o f th e Site

.
1.1 SITE

OVERVIEW T h e Californi a Gulc h Superfun d Sit e i s locate d approximatel y 10 0 miles southwes t o f Denver

, Colorado

, a t a n elevatio n o f 10,00 0 fee t mea n sea level

. Th e sit e encompasse s th e town s o f Leadvill e an d Stringtown

, an d include s a portio n o f th e Leadvill e Histori c Minin g District

. Th e are a ha s experience d 13 0 year s o f minin g an d smeltin g activities

. I t wa s place d o n th e Nationa l Prioritie s Lis t (Superfun d Sit e #29 ) i n 198 3 du e t o extensiv e drainag e o f acid-meta l lade n wate r int o th e Arkansa s River

. Minin g activitie s bega n i n th e are a i n th e 1860 s whe n place r gol d wa s discovere d i n Californi a Gulch

. Subsequently

, undergroun d an d hardroc k method s wer e use d t o min e sulfid e an d carbonat e or e deposit s ric h i n metal s suc h a s silver
, gold
, copper , lead
, and zinc

. Blas t or reverberator y furnace s (smelters ) wer e use d t o releas e thes e metal s fro m th e or e i n th e for m o f oxidize d vapors

. On e byproduc t o f thes e processe s i s lea d slag

. Sla g i s a dar k vitreous materia l tha t i s compose d primaril y o f iron , magnesium , calcium
, an d silica
, wit h residua l heav y metals

. Sla g i s har d
and relativel y dens e and generall y exist s a s lava-lik e roc k layer s o r block y an d angula r materia l generall y foun d ver y nea r th e smelte r areas
.

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T 1 F:\100 0

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### Approximatel

y 1 7 smelte r facilitie s ar e reporte d t o hav e onc e operate d withi n th e Site

, bu t mos t minin g operation s i n th e are a ha d cease d b y th e earl y 1900s

. Today

, al l o f the histori c mill s and smelter s onsit e ar e inactiv e and/o r demolished
, an d nearl y al l o f th e mine s withi n th e sit e boundarie s ar e inactiv e (EPA

, 1998)

.
1.2 PURPOSE T h e purpos e o f thi s Reques t fo r Certificatio n o f Closur e Repor t i s t o demonstrat e complianc e wit h th e term s o f th e Septembe r 15,199 3 Consen t Decree

. Thi s repor t document s tha t UPR R ha s complete d al l activitie s required b y th e Statemen t o f Wor k an d th e Recor d o f Decisio n (ROD ) fo r OU 3 (EPA

, 1998)

. B y certifyin g tha t th e term s o f th e Consen t Decre e hav e been met , UPR R state s tha t al l OU 3 area s hav e bee n successfull y remediate d an d d o not presen t an endangermen t t o publi c health
, welfare
, or th e environment

. Additionally
, b y donatin g portion s o f OU 3 t o Lak e Count y an d preservin g a histori c minin g artifac t (th e Arkansas Valle y Sla g Pile)

, UPR R has show n tha t a remediatio n effor t tha t values th e bes t interest s o f the communit y ca n b e a successfu l project

.
1.3 SCOPE Th e Site

, whic h i s approximatel y 16. 5 squar e miles
, i s divide d int o twelv e Operabl e Units

. Operabl e Unit s ca n b e define d base d o n a particula r geographi c area , media
, typ e o f contamination , phas e o f stud y o r clean



### u p tha t lend s itsel f t o efficien t stud y o r clean-up

. UPR R i s responsibl e fo r activitie s relate d t o OU 3 a s define d i n the Consen t Decree an d it s relate d Statemen t o f Work

. Additiona l activitie s i n OU 3 an d othe r location s withi n th e sit e wer e als o complete d unde r th e 199 1 Administrativ e Order 

### o n Consent

. I n 1992 , D&R G complete d a Remedia l Investigation/Feasibilit

y Stud y (RI/FS ) o f th e followin g majo r lea d sla g pile s i n th e Site : Arkansa s Valley
, L a Plata

, Harriso n Street

, Georgi a Gulch

, Lowe r Evan s Gulch

, Middl e Evan s Gulch

, an d Uppe r Evan s Gulc h (Morriso n Knudsen

, 1992a)

. D&R G als o complete d RI/F S wor k a t a zin c sla g pil e nea r th e Lak e Count y Hig h Schoo l (Morriso n Knudsen

, 1992b)

. Thes e activitie s fulfille d th e requirement s o f th e December 15,199 1 Administrativ e Orde r o n Consent

. Activitie s required b y th e 1993 Consen t Decre e withi n OU 3 includ e additiona l investigatio n an d remediatio n o f th e thre e D&RG-owne d lea d

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### sla

g pile s (Arkansa s Valley / L a Plata

, an d Harriso n Street)

, th e railyard
, the rai l easement , and the are a adjacen t t o the Harriso n Stree t sla g pile

. D&R G als o agreed t o conduc t additiona l investigation s a t three sla g pil e area s outsid e o f OU 3 (Uppe r an d Middl e Evan s Gulc h Sla g Pile s an d th e Georgia Gulc h Sla g Pile)

, but wa s not require d t o perfor m an y remedia l 

### activitie s at thes e areas
.

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P:\1000\UNIONPAC\1997\CALGULCH\FINALRPT.DO C2. 0 DESCRIPTION

O F WORK PERFORMED 

### UPR R (an d th e forme r D&RG ) hav e bee n activ e i n investigatio n an d remediatio n activitie s a t th e Sit e since th e earl y 1990s

. Previou s investigation s performe d b y D&R G includ e preliminar y Remedia l Investigatio n an d Feasibilit y Studie s fo r th e seve n majo r lea d sla g pile s an d on e zin c sla g pil e i n th e Sit e (a s required b y th e 199 1 Administrativ e 

### Order o n Consent)

. D&R G als o produce d a Fina l Stockpile d Fin e Sla g Feasibilit y Stud y whic h assiste d th e EP A i n determinin g a n actio n pla n f o r stockpile d fin e sla g within th e site

. Mos t importantly
, UPR R ha s complete d th e remediatio n o f th e following OU 3 areas : th e Arkansa s Valle y Sla g Pile

, th e Harriso n Stree t Slag Pil e an d adjacen t area , th e L a Plat a Sla g Pile

, th e UPRR-owne d portio n o f th e railyard
, an d th e railroa d easement whic h run s diagonall y throug h th e town o f Leadville

.
2.1 SLAG

PILE INVESTIGATIONS O n Decembe r 3,1991 , D&R G and EP A entere d int o an Administrativ e Order o n Consen t (CERCLA-VIII-92006

) fo r a Remedia l Investigation/Feasibilit

y Stud y (RI/FS ) t o b e performe d o n th e majo r lea d sla g pile s an d on e zin c sla g pil e within th e Site

. Thes e studie s wer e delivere d t o EP A i n December

, 1992 , and wer e the basi s fo r a Fina l Screenin g Feasibilit y Stud y (SFS ) fo r Remediatio n Alternative s Repor t (EPA

, 1993)

. T h e RI/F S fo r Lea d Sla g Pile s (Morriso n Knudsen

, 1992a ) examine d seve n lea d sla g pile s (includin g th e thre e OU 3 sla g piles ) withi n Californi a an d Evan s Gulches

. Th e stud y focuse d o n th e fiv e potentia l releas e mechanism s develope d b y EP A an d presente d i n th e Work Pla n fo r th e Sla g Pil e Remedia l Investigatio n (Morriso n Knudsen

, 1991)

. Th e potentia l releas e mechanism s include d wind
, leaching
, mixin g b y human activities , runof f o f particulates
, an d direc t contact

. A i r pathwa y analyse s conducte d durin g th e RI/F S indicate d tha t win d erosio n wa s no t a viabl e releas e mechanis m fo r an y o f th e lea d sla g piles

. Althoug h mixin g b y huma n activitie s ma y hav e occurred i n the past , i t was mainl y associate d wit h th e us e o f sla g fo r roa d sandin g an d ballas t operations

. Roa d sandin g i s no longe r an approve d us e for slag
, and al l futur e ballas t sortin g activitie s wil l compl y wit h th e requirement s o f th e Ballas t Operation s Pla n (Industria l Compliance

, Inc.
, 1995)

. Th e Ballas t Operation s Pla n addresse s dus t suppressio n techniques an d Bes t Managemen t Practice s fo r th e preventio n o f exposur e t o fines)

. Therefore

, mixin g b y huma n activitie s i s no t considere d t o b e a viabl e releas e
ENVIRONMENTA

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P:\10ao\UNIONPAC\1997\CALGULCH\FINALRFr.DO Cmechanism

.

N o evidenc e o f transpor t o f sla g b y surfac e runof f wa s observed
, an d pil e integrit y appeare d t o b e intac t fo r al l sla g pile s include d in th e RI/FS

. Therefore / runof f wa s no t retaine d a s a feasibl e releas e mechanism

. Additionally
, EP A considere d direc t contac t wit h th e sla g pile s insignifican t in th e Preliminar y Baselin e Huma n Healt h Ris k Assessmen t (EPA

, 1991)

. O f th e fiv e potentia l releas e mechanisms
, onl y th e leachin g o f metal s through contac t wit h precipitatio n o r othe r sit e waters was retaine d as viable

. Th e othe r fou r potentia l releas e mechanism s wer e show n no t t o occur , an d therefor e secondar y sources , exposur e routes , an d potentia l receptor s d o no t for m a complet e pathway

. I n orde r t o determin e th e exten t o f leachin g o f metal s a t th e sla g piles
, leachin g studie s wer e performe d o n sample s fro m al l seve n lea d sla g piles

. Syntheti c Precipitatio n Leachin g Procedur e (SPLP

, EP A Metho d 1312 ) an d colum n leac h tes t result s showe d minima l leachin g o f metals

. T h e SPL P result s fo r al l element s teste d in sla g wer e u p t o tw o orders o f magnitud e belo w th e toxicit y characteristi c criteri a liste d i n 4 0 CF R 261.24

. Subsla g testin g als o indicate d tha t leachat e fro m sla g does no t contribut e t o elevate d metal s concentration s i n th e vados e zon e beneat h th e sla g piles

. Thi s conclusio n i s supporte d b y th e lac k o f acid-generatin g potentia l an d th e neutral-to-basi c p H o f th e sla g an d subsla g materials

. T h e RI/F S fo r th e Zin c Sla g Pil e (Morriso n Knudsen

, 1992b ) wa s simila r i n scop e t o th e lea d sla g pil e investigation , an d conclude d tha t leachin g was th e onl y potentia l releas e mechanis m applicabl e t o th e zin c sla g pile

. Leachabilit y test s performe d o n zin c sla g sample s yielde d simila r result s t o th e lea d sla g tests , wit h result s wel l belo w regulatory levels

. Because th e RI/F S state d tha t leachin g o f metal s fro m sla g shoul d b e furthe r considered
, th e SF S define d th e remedia l actio n objectiv e fo r th e thre e OU 3 sla g pile s a s follows : t o preven t leachin g o f metal s o f concer n (lead
, arsenic , cadmium
, and zinc ) i n concentration s tha t woul d hav e an advers e impac t o n soils
, surfac e water , o r ground wate r i n the vicinit y o f th e sla g piles

. Severa l option s wer e evaluate d base d o n thei r effectiveness
, implementability
, an d relativ e cost

. Th e thre e feasibl e remedia l actions retaine d b y th e SF S wer e N o Action
, Institutiona l Controls

, an d Resource Utilizatio n (us e o f stockpile d fin e sla g as additive s i n constructio n materials)

. I n accordanc e wit h th e Consen t Decree

, D&R G submitte d a Fina l Stockpile d Fin e Sla g Feasibilit y Stud y (SFSFS ) fo r remediatio n o f th e followin g sla g piles : Arkansa s Valley
, L a Plata

, Harriso n Street

, Uppe r Evan s Gulch

, Middl e Evan s Gulch

, an d th e Georgi a Gulc h Pil e (Terranext

, 1996a)

. Because EP A determine d tha t th e primar y healt h
concern associate d wit h sla g pile s wa s th e fin e fractio n o f stockpil e sla g
ENVIRONMENTA

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P:\1000\UNIONPAC\1997\CALGULCH\FINALRPT.DO C(i.e.
,

les s tha n 1 / 4 inc h particl e size)
, th e stud y wa s focuse d o n eliminatin g th e potentia l exposur e fro m stockpile d fines

. T h e SFSF S determine d tha t fine s existe d onl y a t th e Arkansa s Valle y pile
, an d evaluate d remediatio n alternative s exclusivel y a t thi s location

. However
, EP A an d the Stat e expresse d concern s abou t the generatio n o f fin e sla g a t th e Harriso n Stree t Sla g Pil e as a resul t o f th e removal o f a portio n o f th e pil e fo r ballas t operations

. Th e SFSF S state d tha t an y futur e ballas t operation s woul d involv e th e transportatio n o f material s t o th e Arkansa s Valle y Sla g Pil e prio r t o sortin g s o tha t fine s woul d b e produce d onl y a t th e Arkansa s Valle y Sla g Pile

. I n 1998 , UPR R addresse d th e concern fo r potentia l fin e sla g generatio n b y movin g th e remainde r o f t h e above-grad e portio n o f th e Harriso n Stree t Slag Pil e t o th e Arkansa s Valle y location

. N o trace s o f th e pil e wer e lef t abov e grade

. Th e remova l
o f th e pil e wa s no t intende d fo r ballas t production
, an d therefor e n o sortin g o f sla g (an d therefor e n o productio n o f fines ) was performe d a t eithe r th e Harriso n Stree t o r Arkansa s Valle y locations.

. T h e SFSF S compare d th e thre e alternative s presente d b y th e SF S (N o Action
, Institutiona l Controls

, an d Resourc e Utilization ) an d recommende d th e N o Actio n alternative

. Thi s remed y leave s th e Arkansa s Valle y fine s subpile s i n thei r existin g conditio n wit h n o remediation
, engineerin g controls
, lon g ter m maintenance , o r clea n u p 

### planned

. Althoug h th e selecte d remed y does no t reduc e th e volume
, toxicit y o r mobilit y o f th e metal s o f concer n withi n th e sla g piles
, i t i s protectiv e o f huma n healt h an d th e environment

. Th e N o Actio n Alternativ e i s considere d effectiv e becaus e 1 ) releas e mechanism s suc h a s wind
, mixin g b y huma n activities , transpor t o f sla g b y surfac e wate r runoff
, an d direc t contac t d o no t provid e viabl e exposur e pathways
, an d 2 ) leachin g studie s hav e show n th e potentia l fo r releas e o f metal s i n leachat e fro m th e sla g t o b e minimal

. Additionally
, th e N o Actio n Alternativ e wil l not har m the communit y fro m a land-us e perspectiv e becaus e tourist s com e t o th e are a specificall y t o observ e th e remain s o f historica l minin g practice s (EPA

, 1998)

. Eve n thoug h th e potentia l fo r groundwate r contaminatio n caused b y leachin g at the sla g pile s ha s bee n show n t o b e minimal
, UPR R wil l conduc t surfac e wate r and groun d wate r monitorin g i n the futur e i f deeme d necessary
. Thes e potentia l monitorin g activitie s wil l be limite d i n scope , an d wil l b e implemente d fo r th e sol e purpos e o f evaluatin g an y threat s pose d t o huma n healt h or th e environmen t b y th e sla g piles

. UPR R ha s complete d additiona l wor k i n OU 3 beyon d tha t required b y th e N o Actio n Plan

. Th e remainder o f thi s sectio n detail s th e wor k performed

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P:\1000\UNIONTAC\1997\CALGULCH\HNAinPT.DO C2. 2 ARKANSA

S VALLE Y (AV ) SLAG PILE
2.2. 1 History Th e A V Smelte r wa s th e larges t an d longes t operatin g smelte r i n th e Leadvill e area
. I t was locate d wes t o f th e cit y limit s o f Leadvill e an d operate d fro m 188 2 t o 1960

. Th e A V sla g pil e wa s originall y create d whe n molte n sla g wa s poure d directl y fro m crucible s ont o th e ground
, formin g a welde d pile

. I n th e 1940s , th e A V smelte r bega n t o quenc h th e molte n sla g wit h col d water , whic h produce d a mor e fine-graine d slag

. Th e volum e o f th e sla g pil e i n th e 1950 s wa s estimate d (wit h aerial photographs ) t o b e approximatel y 1. 2 millio n cubi c yards

. Th e A V pil e wa s purchase d b y D&R G fro m ASARC O i n 196 1 fo r us e a s a source o f railroa d trac k ballast

. A s a resul t o f D&R G processin g th e sla g fo r us e a s ballas t material
, th e A V pil e wa s sorte d int o severa l sub-pile s includin g sorte d fines
, water-quenche d fines
, ballast-size d material
, oversize d material
, an d unsorte d air-coole d sla g (EPA

, 1998)

. Ballast

size d materia l consist s o f particle s rangin g fro m approximatel y 3/ 8 inc h t o 2-1/ 2 inc h i n diameter
, whil e fine s ar e define d a s particle s les s tha n 1/ 4 inc h i n diameter

. B y 1993 , muc h o f the ballast-size d materia l had been removed fro m the A V pile
, an d som e o f the under-size d materia l ha d bee n sol d fo r us e a s roa d sand

. The volum e o f th e pil e at thi s tim e wa s estimate d t o b e approximatel y 422,00 0 cubi c yards
, o f whic h 190,00 0 cubi c yard s wer e fines

. I n September

, 1995 , a n archaeologica l surve y wa s conducte d fo r th e Arkansa s Valle y Smelte r ruin s an d th e A V sla g pile

. A t th e completio n o f th e survey , th e permanen t Smithsonia n numbe r o f 5LK89 2 wa s assigne d t o th e Arkansa s Valle y Smelte r b y th e Colorad o Stat e Histori c Preservatio n Offic e (Terranext

, 1996a)

. Th e smelte r wa s recommende d a s eligibl e fo r th e Nationa l Registe r o f Histori c Places

, an d th e sla g pil e wa s recommende d a s a contributin g feature

. Althoug h th e pil e i s no t th e primar y significan t characteristi c o f th e site , i t doe s contribut e t o th e overal l feelin g o f th e magnitud e an d importanc e o f th e sit e (Terranext

, 

### 1996a)

. T h e A V Smelte r sla g pil e i s bounde d b y th e Leadvill e Sewag e Treatmen t Plan t propert y an d State Highwa y 2 4 t o th e south
, ol d smelte r work s t o th e north
, woode d propert y t o th e west , an d othe r smelter-relate d waste s an d Stringtow n t o th e east

. Californi a Gulc h run s adjacen t t o th e sla g pil e f o r approximatel y 1/ 5 th e lengt h o f th e pile

. (EPA

, 1998 )

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Remedial

Action O n Novembe r 15,1996 , EP A approve d a workpla n fo r th e consolidatio n o f fin e sla g at the railyar d t o the A V pil e (Terranext

, 1996b)

. A tota l o f 1,26 4 cubi c yard s o f sla g wer e move d fro m th e railyar d t o th e A V pil e 

### wit h wor k complete d i n October

, 1997

. Additionally
, 104,00 0 cubi c yard s o f sla g wer e relocate d fro m th e Harriso n Stree t pil e wit h wor k complete d b y March
, 1998

. Th e Wor k Pla n fo r th e Harriso n Stree t Sla g Pil e Closur e i s include d i n thi s repor t a s Appendi x A
, and th e EP A approva l lette r i s Appendi x B

. Th e Verificatio n Repor t fo r th e Consolidatio n o f Fin e Sla g a t the Railyar d (ER M 1997 ) i s include d a s Appendi x C

. 

### EP A issue d a Recor d o f Decision (ROD ) i n May
, 1998 , whic h selecte d th e recommende d N o Actio n Alternativ e fo r stockpile d fin e sla g a t th e A V 

### sla g pil e a s presente d i n th e 199 6 Fina l Stockpile d Fin e Slag Feasibilit y Study

. Th e N o Actio n Alternativ e i s considere d effectiv e because 1 ) releas e mechanism s suc h a s wind
, mixin g b y huma n activities , transpor t
o f sla g b y surfac e wate r runoff
, an d direc t contac t d o no t provid e viabl e 

### exposur e pathways
, an d 2 ) leachin g studie s hav e show n th e potentia l fo r releas e o f metal s i n leachat e fro m th e sla g t o b e minimal

. A contingenc y i s als o provide d i n th e RO D for th e implementatio n o f th e Resource Utilizatio n alternativ e i n th e futur e i f regiona l marke t deman d exist s fo r th e materia l as a component i n constructio n materials

. I f thi s alternativ e i s selected
, dust suppressio n technique s and Bes t Managemen t Practice s wil l b e use d t o minimiz e worke r exposur e durin g th e remova l
o f th e slag

. Plans fo r sla g us e i n constructio n material s mus t als o ensur e that th e sla g i s encapsulate d prio r t o it s us e o r reus e i n suc h a wa y tha t wil l addres s an y toxi c leachin g potentia l o f th e fin e slag

. Th e us e o f fin e sla g a s roa d san d wil l no t b e permitted

. I n accordanc e wit h th e Consen t Decree

, D&R G submitte d a Ballas t Operation s Pla n t o EP A i n July
, 199 5 (Industria l Compliance

, Inc.
, 1995)

. This pla n allowe d D&R G (an d subsequentl y UPRR ) t o continu e t o sor t 

### and remov e appropriatel y size d materia l a t the A V pile s for us e a s railroa d trac k ballast

. I n accordanc e wit h th e Plan

, dus t suppressio n 

### technique s an d Bes t Managemen t Practices wer e use d t o control exposur e t o fin e slag

. Additiona l fine s whic h wer e encountere d durin g sortin g activitie s wer e adde d t o th e fine s subpile
, an d ballas t operation s wer e discontinue d i n th e winte r o f 1995

. UPR R doe s no t inten d t o use th e 

### remainin g sla g a t an y o f th e O U 3 area s fo r ballas t because i t doe s no t
mee t thei r specifications

. However
, an y potentia l futur e ballas t productio n operation s wil l b e conducte d i n accordanc e wit h the requirement s o f th e Ballas t Operation s Plan

.

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2.3. 1 History I n 1878 , th e Berdel l an d Witherel l Smelte r bega n operatio n nea r th e L a Plat a sla g pile
, wes t o f th e cit y limit s o f Leadvill e o n El m Street

. I n 1879 , the work s wer e incorporate d a s the L a Plat a Minin g an d Smeltin g Company

, whic h smelte d ore s fro m th e L a Plat a Min e a s wel l a s othe r 

### mine s i n th e area
. Th e compan y wa s reorganize d i n 1886 (a s th e Ne w L a Plat a Minin g and Smeltin g Company)

, but close d i n 188 7 du e t o necessar y equipmen t repairs

. 

### I n 1892 , the Bimetallic Smeltin g Compan y lease d the work s an d renovate d them fo r th e pyriti c smeltin g o f low-grad e ores
. Bimetalli c operate d th e facilit y fo r severa l year s unti l th e America n Smeltin g an d Refinin g Compan y purchase d th e work s shortl y befor e th e plan t wa s close d dow n i n 1900

. I n 1970 , D&R G purchase d th e majorit y o f th e sla g pil e fro m th e Leadvill e Sanitatio n District (som e souther n section s o f th e pil e ar e owne d b y th e Leadvill e Corporation)

. Th e pil e was neve r use d fo r 

### ballas t production

. Durin g smeltin g operation s a t th e L a Plata/Bimetalli c Smelter

, molte n sla g wa s transporte d b y rai l t o th e sla g pil e nea r th e furnaces

. Th e entir e pil e wa s air-cooled
, an d th e norther n sectio n o f th e pil e i s covered b y solid slab s o f slag
, o r a sla g "pavement, " whic h appear s t o hav e bee n poure d int o rectangula r form s approximatel y tw o fee t b y fou r fee t an d averagin g si x inche s thic k (Morriso n Knudsen

, 1992a)

. Th e remainde r o f th e pil e consist s o f welde d layers
, 1 / 2 inc h t o 2 inc h chips
, and whol e and fragmente d sla g buttons approximatel y si x inche s acros s and mixe d wit h 

### partiall y welde d material

. I t has bee n estimate d tha t approximatel y 757,00 0 ton s o f sla g wer e generate d durin g the operationa l histor y o f the smelter
, and the 199 2 Remedial Investigatio n (Morriso n Knudsen

, 1992a ) determine d the volum e o f the pil e t o b e approximatel y 105,00 0 cubi c yards

. 2.3. 2 Remedial

Action Syntheti c Precipitatio n Leachin g Procedur e (SPLP ) test s an d leachin g colum n test s performe d o n th e sla g a t th e L a Plat a pil e indicat e tha t leachin g o f metal s o f concer n i n concentration s tha t woul d hav e an advers e impac t o n soils
, surfac e water , o r groun d wate r ha s no t occurre d (Morriso n Knudsen

, 1992a)

. Th e 199 2 RI/F S als o demonstrate d tha t othe r 

### releas e mechanism s suc h a s wind
, mixin g b y huma n activities , transpor t o f sla g b y surfac e wate r runoff
, and direc t contac t d o not provid e viabl e exposur e pathways

. Additionally
, th e 1996 Fina l Stockpile d Fin e Sla g
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y Studie s foun d tha t n o fin e sla g exist s a t th e L a Plat a pil e 

### (Terranext

, 1996a)

. Therefore

, the remedial actio n objectiv e ha s bee n me t fo r thi s pile
, an d n o furthe r actio n i s required

.
2. 4 HARRISON

STREET SLAG PILE
2.4.1 History T h e Harriso n Reductio n Work s opene d o n th e northeas t corne r o f Harriso n Avenu e an d El m Stree t i n 1877

. Th e Harriso n Work s wa s th e 

### onl y smelte r reporte d t o hav e processe d gol d ores
. B y 1883 , the smelte r installe d roastin g furnace s t o proces s sulfid e ores , an d a doubl e elevato r wa s adde d i n 188 7 t o increas e th e heigh t o f th e sla g pil e outsid e th e facility

. Th e Harriso n smelte r close d i n 189 3 durin g th e silve r panic

. Durin g the nex t centur y the productio n o f or e fro m loca l mine s decrease d dramatically
, an d a n attemp t wa s mad e t o rewor k man y o f th e ol d sla g pile s lef t b y th e smelters

. I n 1917 , Harriso n Recover y Works wa s establishe d t o rewor k th e H S sla g pile
, whic h wa s estimate d t o b e greate r tha n 1 millio n ton s a t the time

. (Morriso n Knudsen

, 1992a ) D&R G purchase d th e Harriso n Stree t Slag Pil e fro m N L Industrie s i n 198 3 fo r us e a s ballas t production

. Th e origina l sla g pil e range d fro m 2 0 - 5 0 fee t i n height
, and covere d an are a o f approximatel y 3 acres
. Onl y smal l trace s (concret e an d a fe w bricks ) wer e lef t fro m th e smeltin g facilit y a t th e nort h sid e o f th e pile

. Th e propert y wil l be sol d t o th e Cit y o f Leadvill e (se e Sectio n 2.4. 2 fo r a descriptio n o f th e dee d restrictio n an d sla g remova l activities)

. Star r Ditch run s alon g th e sout h sid e o f th e forme r pile
, an d a gas statio n an d severa l smal l house s ar e locate d immediatel y t o th e north

. 

### Additiona l residences ar e locate d approximatel y 20 0 yard s t o th e east , and commercia l building s and th e Apach e Tailing s Pond s are locate d 20 0 yard s t o th e south

. 2.4. 2 Remedial

Action T h e Harriso n Stree t Sla g Pil e consolidatio n projec t wa s complete d i n March
, 199 8 wit h approximatel y 104,000 cubi c yard s o f sla g relocate d t o t h e Arkansa s Valle y Sla g Pil e (se e Appendice s A an d B fo r th e workpla n an d EP A approval)

. Du e t o th e presenc e o f belo w grad e sla g an d 

### resultin g elevate d concentration s o f lea d a t thi s propert y an d th e are a o f th e forme r sla g pile
, EP A ha s require d tha t a fina l cove r b e place d ove r the native soils

. Leachabilit y studie s performe d on the subsla g sample s at

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Harriso n Stree t Sla g Pil e durin g th e 199 2 RI/F S indicat e tha t leachin g o f metal s fro m th e subsla g soil s i n concentration s tha t woul d hav e a n advers e impac t surfac e wate r o r ground wate r ha s not occurred (Morriso n Knudsen

, 1992a)

. A permanen t cove r wil l ensur e tha t no othe r releas e mechanism s (wind
, mixin g b y huma n activities , surfac e wate r runoff
, an d direc t contact ) wil l provid e viabl e exposur e pathways

. Because UPR R intend s t o sel l th e propert y t o th e Cit y o f Leadville

, a dee d restrictio n (Appendi x D ) ha s bee n adde d t o th e propert y titl e whic h wil l addres s th e installatio n an d maintenanc e o f th e cover
. Dependin g o n th e intende d futur e us e o f th e property , severa l choice s o f appropriat e cove r material s ar e given a s follows : a minimu m o f si x inche s o f soil
, a minimu m o f fou r inche s o f asphalt
, o r a combinatio n o f asphal t fo r som e portion s o f th e propert y an d soi l fo r othe r portions

. Th e dee d restrictio n ensure s th e long-ter m effectivenes s o f th e cove r b y requirin g th e owne r o f the propert y t o contac t EP A prio r t o an y excavatio n o r subsurfac e work
, an d t o restor e th e cove r afte r th e completio n o f suc h activities

. Completio n o f th e cove r installatio n an d cove r inspectio n wil l b e documente d wit h measurement s an d a phot o log

.
2. 5 MIDDLE

AN D UPPER EVANS GULCH SLAG PILES (EXCLUDING TH E ELGIN SMELTER PILES)
2.5.1 History T h e Cummings an d Fin n Smelte r Work s bega n operation s i n Bi g Evan s Gulc h i n 1879

. The work s containe d two furnace s and treate d or e fro m the mine s on Frye r Hill
, whic h wer e reporte d t o b e som e o f the riche s ore s i n Leadville

. Th e plan t als o operate d unde r th e nam e o f th e Frye r Hil l Smeltin g Company

, an d wa s dismantle d i n 1886

. Othe r smelter s whic h operate d i n the Bi g Evan s Gulc h Are a includ e the Ohi o and Missour i Smelter

, th e Gage-Hagama n Smelter

, an d th e Raymond

, Sherma n an d McKa y Smelter

. Thes e smelters contribute d t o the sla g i n the are a i n a relativel y mino r wa y du e t o irregula r an d short-ter m operation

. Tw o sla g pile s wer e create d durin g th e operatio n o f smelter s i n Bi g Evan s Gulch

. The Uppe r Bi g Evan s Gulc h Pil e i s the large r o f the two and cover s approximatel y thre e acre s wit h depth s u p t o 2 0 feet

. Th e Middl e Evan s Gulch Sla g Pil e i s locate d immediatel y wes t o f th e large r pile
, an d cover s les s tha n on e acre
. Tw o individual s purchase d th e plan t wit h th e purpos e o f reworkin g thes e sla g piles
, bu t i t i s unknow n i f an y sla g wa s reworke d durin g the lat e 1800 s an d earl y 1900s

. W

. E

. Bowde n lease d the propert y 

### i n 1926 an d intende d t o mov e th e sla g (estimate d t o b e approximatel y

ENVIRONMENTA

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P:\1000\UNIONFAC\1997\CALGULCH\FINALRPT.DO C150,00 0

ton s a t th e time ) t o th e Arkansa s Valle y Plan t fo r reworking

. Th e actua l amoun t o f materia l move d ha s not bee n verified

. 2.5. 2 Remedial

Action T h e result s o f th e 199 2 RI/F S indicate d tha t 1 ) releas e mechanism s suc h
a s wind
, mixin g b y huma n activities , transpor t o f sla g b y surfac e wate r runoff
, an d direc t contac t d o no t provid e viabl e exposur e pathways
, an d 2 ) leachin g studie s hav e show n th e potentia l fo r releas e o f metal s i n leachat e fro m th e sla g t o be minimal

. Additionally
, th e 199 6 Fina l Stockpile d Fin e Sla g Feasibilit y Studie s foun d tha t n o fin e sla g exist s a t thes e pile s (Terranext

, 1996a)

. Because th e pile s wer e no t owne d b y D&R G o r UPRR

, UPR R i s no t require d t o complet e an y remediatio n at thi s site

.
2. 6 GEORGI

A GULCH (GG) SLAG PILE
2.6.1 History The Gran t Smelte r bega n operation s i n 187 8 o n th e norther n ban k o f th e Californi a Gulc h drainage
, jus t insid e th e cit y limit s o f Leadville

. I n 1879 , a 1,00 0 foo t lon g rai l trac k wa s constructe d fo r transportin g an d dumpin g slag

. B y 1880 , th e Gran t Smelte r wa s th e larges t smeltin g operatio n i n Leadville

, and processe d ore s fro m othe r area s i n Colorad o a s wel l a s loca l ores
. A fir e destroye d the plan t i n 1882 , and i t wa s estimate d tha t th e smelte r produce d 154,00 0 ton s o f sla g befor e i t shu t down

. I n 1892 , Holde n Smeltin g an d Refinin g Compan y buil t a ne w smelte r i n th e are a fo r th e purpos e o f recoverin g silve r fro m sla g generate d b y bot h th e Gran t an d L a Plat a smelters

. Followin g th e silve r panic , th e plan t was sol d i n an auctio n t o the Unio n Smeltin g Company

, and wa s eventuall y sol d agai n t o th e America n Smeltin g an d Refinin g Company

. I t has bee n estimate d tha t approximatel y 114,00 0 t o 174,00 0 ton s o f sla g wer e produce d durin g thi s time

. T h e volum e o f sla g remainin g a t th e Georgi a Gulc h Slag Pil e wa s estimate d t o b e approximatel y 4,60 0 cubi c yard s i n 1992

. Th e sla g wa s reportedl y use d a s railroa d trac k ballas t b y th e Leadville

, Colorad o an d Souther n Railroa d Company (Morriso n Knudsen

, 1992a)

.

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P:\1000\UNIONPAC\1997\CALGULCH\HNALRPT.DO C2.6. 2

Remedial

Action Th e result s o f th e 199 2 RI/F S indicate d that 1 ) releas e mechanism s suc h
a s wind
, mixin g b y huma n activities , transpor t o f sla g b y surfac e wate r 

### runoff
, an d direc t contac t d o no t provid e viabl e exposur e pathways
, an d 2 ) leachin g studie s hav e show n th e potentia l fo r releas e o f metal s i n leachat e fro m th e sla g t o be minimal

. Additionally
, th e 199 6 Fina l Stockpile d Fin e Sla g Feasibilit y Studie s foun d tha t n o fin e sla g exist s a t 

### thes e pile s (Terranext

, 1996a)

. Because the Georgi a Gulc h pil e wa s not owned b y D&R G or UPRR

, 

### UPR R i s no t required t o complet e an y remediatio n a t thi s site

.
2. 7 LOWE

R EVAN S GULCH SLAG PILE
2.7.1 History Th e Elgi n Smelte r bega n operation s i n 187 9 nea r Bi g Evan s Gulch

, jus t 

### eas t o f Highwa y 2 4 an d t o th e nort h o f Leadville

. Th e Smelte r close d i n 188 2 du e t o th e competitio n fo r fue l an d hig h grad e lea d ores
. Th e work s the n wer e lease d an d operate d b y several differen t companie s betwee n 189 3 an d 1902

. I t has bee n estimate d tha t thes e smelter s generate d betwee n 200,00 0 and 280,00 0 ton s o f slag

. I n 1925,63,00 0 ton s wer e purchased
, som e o f whic h was sen t t o th e Arkansa s Valle y plan t fo r 

### reprocessing , and som e wa s reportedl y purchase d b y D&R G for us e a s ballast

. 2.7. 2 Remedial

Action D&R G wa s require d t o includ e the Lower Evan s Gulch Sla g Pil e i n the remediatio n an d feasibilit y studie s complete d unde r the 199 1 Administrativ e Orde r o n Consent

. Th e result s o f th e RI/F S indicate d tha t 1 ) releas e mechanism s suc h a s wind
, mixin g b y huma n activitie s 

### transpor t o f sla g b y surfac e wate r runoff
, an d direc t contac t d o no t provid e viabl e exposur e pathways
, an d 2 ) leachin g studie s hav e show n 

### th e potentia l fo r releas e o f metal s i n leachat e fro m th e sla g t o be minimal

. D&R G wa s no t require d t o perfor m an y furthe r activitie s fo r thi s are a unde r the 199 3 Consen t Decree

.

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P:\1000\UNIONPAC\1997\CALGULCH\FINALRPT.DO C2 . 8 ZIN

C SLA G PIL E
2.8. 1 History T h e Wester n Zin c Minin g an d Reducin g Compan y constructe d a smelte r t o th e wes t o f th e Tow n o f Leadvill e i n 1914

. Th e smelte r extracte d zin c fro m ores , an d i t i s reporte d that th e sla g generate d wa s sen t t o othe r smelter s (includin g th e Arkansa s Valle y Smelter ) fo r th e recover y o f additiona l metal s suc h as lead
, silver
, copper , an d gold

. Th e smelte r close d i n 1926 , an d i t i s estimate d that approximatel y 51,00 0 t o 70,00 0 ton s o f sla g wer e generate d durin g it s history

. Th e zin c sla g pil e cover s severa l acre s nea r th e Lak e Count y Fai r Ground s an d th e Lak e Count y Hig h School

. Remain s o f th e smelte r foundatio n ar e locate d east o f th e sla g pile

. Th e sla g pil e i s owne d b y Lak e County

. 2.8. 2 Remedial

Action D&R G wa s require d t o includ e the Zin c Sla g Pil e i n the remediatio n and feasibilit y studie s complete d unde r th e 199 1 Administrativ e Order o n Consent

. Durin g the remedia l investigation , zin c sla g wa s observe d o n som e dirt roadway s i n th e area
. Th e stud y conclude d tha t ther e wa s n o evidenc e o f fine s bein g carrie d awa y fro m th e pile s vi a surfac e wate r runoff

. Wind
, mixin g b y huma n activities , an d direc t contac t wer e als o no t considere d t o be viabl e releas e mechanisms.

. Leachin g studie s indicate d 

### tha t th e potentia l fo r releas e o f metal s i n leachat e fro m th e zin c sla g i s minima l (Morriso n Knudsen

, 1992a)

. D&R G does not own thi s zin c sla g pile
, an d wa s no t required t o perfor m an y furthe r activitie s fo r thi s are a unde r the 199 3 Consen t Decree

.
2. 9 RAILYARD
2.9.1 History Th e railyar d ha s see n ove r 13 0 year s o f transportatio n activities , mostl y associate d wit h minin g i n th e area
. Sla g wa s use d i n th e railyar d a s ballas t an d a s a roa d base t o provid e suppor t fo r heav y vehicula r traffic

. Sla g wa s als o deposite d aroun d th e loadin g doc k du e t o spillag e durin g transportatio n activities

. Th e UPPR-owne d portio n o f th e railyar d i s locate d nea r th e nort h en d o f th e tow n o f Leadville

, an d encompasse s a n are a o f roughl y 4 3 acre s an d i s crossed b y abandone d rai l lines and acces s roads

. A 200-foo t lon g concret e an d earthe n loadin g doc k i s locate d nea r th e sout h en d o f th e

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.

A transfe r o f ownershi p o f th e railyar d t o a privat e part y ma y b e complete d i n th e fal l o f 1999

. The railyar d i s surrounde d b y a mixtur e o f residentia l housin g o n the sout h an d west , commercia l establishment s o n th e north
, an d th e Leadville

, Colorad o & Souther n Railroa d propert y o n th e east

. Th e rai l yar d i s bounde d b y 12t h Stree t o n th e south
, Highwa y 2 4 o n th e west , an d 

### 17t h Stree t o n th e north

. 2.9. 2 Remedial

Action I n accordanc e wit h th e Consen t Decree

, a reconnaissanc e o f th e rai l yar d
wa s conducte d on Septembe r 1 5 and 16,199 4 (Morriso n Knudsen

, 1995)

. The tota l volume o f sla g i n the railyar d wa s estimate d t o b e 45 0 cubi c yards
, o f whic h 22 0 cubi c yard s wer e identifie d a s fin e slag

. D&R G submitte d a Workpla n fo r th e Consolidatio n o f Fin e Sla g a t th e Railyar d i n November
, 199 6 (Terranext

, 1996b)
, and removal o f sla g wa s conducte d durin g th e summe r an d fal l o f 199 7 (n o attemp t wa s mad e t o separat e fin e fro m coars e slag)

. A fron t en d loade r was use d t o scrap e sla g fro m th e surfac e o f th e railyard
, an d th e sla g was loade d int o dum p truck s an d haule d t o th e Arkansa s Valle y Sla g Pile

. Area s tha t coul d no t b e reache d b y the fron t end loade r wer e hand-shoveled

. A tota l o f 1,26 4 cubi c yard s o f sla g wer e remove d fro m the railyar d and consolidate d 

### ont o th e Arkansa s Valle y Sla g Pile

. A Pre-Certificatio n Inspectio n o f th e railyar d wa s complete d o n Septembe r 23,199 7 b y member s o f EPA

, th e Colorad o Departmen t o f Public Healt h an d Environment (CDPHE)

, an d Environmenta l Resource s Managemen t (ERM)

. Th e Verificatio n Repor t fo r th e Consolidatio n o f Fin e Sla g fro m th e Railyar d was submitte d t o EP A o n Novembe r 17,1997 , an d i s include d a s Appendix C o f thi s report

.
2.10 RAIL

EASEMENT
2.10.1 Description T h e rai l easemen t include s th e portio n o f railroa d trac k whic h run s diagonall y throug h th e tow n o f Leadville

, an d consist s o f approximatel y 2 5 fee t o n eithe r sid e o f th e trac k centerline

. The easemen t begin s o n th e wes t sid e o f McWeth y Driv e an d continues t o th e railyard

.

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Remedial

Action 

### I n accordanc e wit h th e Consen t Decree

, D&R G submitte d a Samplin g an d Analysi s Pla n (Morriso n Knudsen

, 1994a ) an d a Reconnaissanc e Repor t (Morriso n Knudsen

, 1994b ) o f th e rai l easement

. Durin g th e reconnaissance , "area s o f concern, " o r area s o f trac k ballas t slippage
, wer e identified
, an d mapped

. Th e dept h an d aeria l exten t o f al l area s containin g sla g wer e als o measured
, an d th e percentage s o f fine s wer e estimated

. Approximatel y 20 0 cubi c yard s o f sla g (abou t hal f o f whic h ar e fines ) wer e identifie d i n area s o f slippage

. I n Jul y 1998 , UPR R submitte d a Wor k Pla n fo r th e Consolidatio n o f Fin e Sla g a t th e Railroa d Easement

. This workpla n provide s fo r th e easemen t t o be converte d int o a segmen t o f th e Minera l Bel t Bik e Trai l (Phas e II)

. T h e wor k pla n an d EPA' s approva l lette r ar e include d i n thi s repor t a s Appendice s E an d F

. I n orde r t o complet e a n Applicatio n fo r Abandonmen t o f th e rai l easement , UPR R submitte d a combine d Environmenta l an d Histori c Repor t t o th e Surfac e Transportatio n Boar d i n April
, 1998 , an d a Notic e o f Exemptio n was file d i n May
, 1998

. Th e Applicatio n was approve d i n July
, 

### 1998

. Prio r t o ballas t consolidation
, th e rail s an d tie s wer e removed fro m th e easement

. Al l area s o f slippag e wer e excavate d t o a t leas t groun d surface
, an d enoug h soi l wa s remove d t o ensur e tha t al l fine s wer e eliminated

. Consolidate d ballas t was place d o n th e upslop e sid e o f th e trac k be d whenever feasible

. Visua l inspectio n an d photograph s wer e use d t o verif y tha t al l area s o f ballas t slippag e wer e replace d bac k ont o th e trac k bed

. T h e completio n o f th e consolidatio n wor k was approve d i n September

, 

### 199 8 (EP A approva l letter s ar e include d as Appendi x G)

. Th e conversion o f th e easemen t t o th e Minera l Bel t Trai l wil l be complet e wit h th e installatio n o f a sub-base
, culverts
, asphalt
, an d signs , centerlin e striping , an d vegetation

. I n accordanc e wit h th e Memorandu m o f Understandin g (se e Appendi x H)
, Lak e Count y wil l complet e thes e projects , an d UPR R wil l provid e fundin g fo r th e sub-base
, culverts
, an d asphalt

. Th e trai l i s expecte d t o b e complete d i n th e sprin g o f 1999

. Ownershi p o f the easemen t wil l b e donate d t o Lak e Count y vi a qui t clai m deed

. Futur e maintenanc e o f th e trai l wil l be performe d b y Lak e Count y i n accordanc e wit h th e Memorandu m o f Understandin g an d th e Minera l Bel t Bik e Trail Projec t specification s

ENVIRONMENTA

L RESOURCE S MANAGEMEN

T 1 6 P:\1000\UNIONPAC\1997\CALGULCH\FINALRPT.DO C3. 0 SUMMAR Y UPR R has successfull y complete d th e investigativ e an d remedia l activitie s required a t Operabl e Uni t 3 o f th e Californi a Gulc h Superfun d Sit e a s state d i n the 1993 Consen t Decree and the 199 1 Administrativ e Orde r o n Consent

. T h e 199 2 RI/F S demonstrate d tha t fou r o f th e potentia l releas e mechanism s define d i n th e sit e conceptua l mode l (wind
, surfac e water runoff
, mixin g b y huma n activities , an d direc t contact ) di d no t provid e viabl e exposur e pathway s fo r lea d an d zin c sla g piles

. Thi s stud y als o indicate d tha t th e potentia l fo r leachin g o f metal s o f concern fro m sla g pile s i s minimal

. I n 1996 , th e Fina l Stockpile d Fin e Sla g Feasibilit y Stud y addresse d th e stockpile d fin e sla g a t th e followin g sla g piles : Arkansas Valle y Sla g Piles

, L a Plat a Sla g Pile

, Harriso n Stree t Sla g Pile

, Uppe r an d Middl e Evan s 

### Gulc h Sla g Piles

, an d th e Georgi a Gulc h Sla g Pile

. Th e stud y foun d tha t fin e slag
, whic h wa s EPA' s primar y healt h concern associate d wit h th e sla g piles
, wa s onl y presen t a t th e Arkansa s Valle y Sla g Pile

. Thi s stud y wa s th e basi s o f EPA' s Record o f Decision

, publishe d in May
, 1998 , whic h selecte d th e N o Actio n Pla n fo r stockpile d fin e sla g a t th e Arkansa s Valle y Sla g Pile

. UPR R ha s complete d remedial activitie s a t eac h o f th e followin g OU 3 

### areas : Arkansa s Valle y Slag Pil e T h e Ballas t Operation s pla n allowe d UPR R t o continu e t o sor t sla g a t th e Arkansa s Valle y Pile

, an d t o us e appropriatel y size d materia l a s railroa d trac k ballast

. Th e 199 8 RO D determine d tha t th e fine s sub-pile s wil l b e lef t i n place

. Th e RO D als o provide s a contingenc y fo r th e implementatio n o f th e Resource Utilizatio n alternativ e i n th e futur e i f regiona l marke t deman d exist s fo r the materia l a s a componen t i n constructio n materials

. Resourc e Utilizatio n plan s mus t addres s an y toxi c leachin g potentia l o f th e fin e sla g (and therefor e th e us e o f fin e sla g a s 

### roa d san d i s unacceptable)

. UPR R ha s determine d tha t the material s remainin g withi n the O U 3 area s d o no t mee t specification s fo r us e a s ballas t material

. However
, an y futur e sortin g activitie s a t th e Arkansa s Valle y Sla g Pil e sit e wil l compl y wit h the requirement s o f the 199 5 Ballas t Operation s Plan

, whic h

ENVIRONMENTA

L RESOURCES MANAGEMEN

T 1 7 P:\1000\UNIONPAC\1997\CALGULCH\nNALRPT.DO Caddresse s

dus t suppressio n technique s an d Bes t Managemen t Practice s t o minimiz e worke r exposure

. 

### Harriso n Stree t Sla g Pil e T h e forme r Harriso n Stree t Sla g Pil e wa s consolidate d ont o th e Arkansa s Valle y Sla g Pile

, an d th e propert y wil l be sold

. A dee d restrictio n has bee n place d o n the propert y tha t require s a cove r (soil
, asphalt
, o r a combination ) t o b e applie d an d maintaine d afte r propert y transfer

. 

### L a Plat a Sla g Pil e T h e result s o f th e Fina l Stockpile d Fin e Sla g Feasibilit y Stud y (Terranext

, 1996a ) indicate d tha t fine s d o no t exist a t th e L a Plat a Sla g Pile

. Because ther e ar e n o complet e exposur e pathway s an d leachin g o f metal s fro m th e sla g i s minimal
, n o remedia l actio n i s required for thi s area
. 

### Railyar d Lea d sla g use d i n the railyar d fo r ballas t and grading
, and als o sla g whic h
wa s spille d nea r th e loadin g doc k ha s bee n removed an d consolidate d ont o th e Arkansa s Valle y Sla g Pile

. Rai l Easemen t UPR R ha s chose n a remedia l actio n pla n whic h no t onl y addresse s th e lea d sla g o n th e rai l easement , bu t als o provide s th e communit y wit h a beneficia l resource
. Al l area s o f ballas t slippag e hav e bee n consolidate d bac k ont o the track
, whic h wil l b e covered wit h a sub-base and asphal t an d converte d int o a segment o f th e Minera l Bel t Bik e Trail

. Th e trai l i s expecte d t o b e complete d i n the sprin g o f 1999

.

ENVIRONMENTA

L RESOURCE S MANAGEMEN

T 1 8

P:\1000\UNIONFAC\1997\CALGULCH\FINALRPT.DO C

### 4.0 CERTIFICATION 

### T h e followin g statemen t shal l certif y tha t al l wor k fo r OU 3 ha s bee n complete d i n ful l satisfactio n o f th e requirement s o f th e Consen t Decre e 

### entere d int o betwee n th e Unite d State s Environmenta l Protectio n Agenc y a n d Unio n Pacifi c Railroa d Compan y (o n behal f o f Denve r an d Ri o Gran d Wester n Railroa d Company) o n Septembe r 15, 1993 : To the best of my knowledge, after thorough 

### investigation, I certify that the information contained in or accompanying this submission is true, 

### accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations.

Pete r R

. Bierbaum

, P.E

. Project Manager, ERM Gafy L

. Honeyma n 'Environmental Site Remediation Manager, Union Pacific Railroad

ENVIRONMENTA

L RESOURCE S MANAGEMEN

T P: M 000\unionpac\calgulch\closure.DO C5.0 REFERENCES Environmenta l Resource s Managemen t (ERM)

. 1998a

. Wor k Pla n fo r th e Harriso n Stree t Sla g Pil e Closure

, Intersectio n o f Harriso n an d Monro e Streets

, Leadville

, Colorado

. Novembe r 12,1998

. Environmenta l Resource s Managemen t (ERM)

. 1998b

. Wor k Pla n fo r th e Consolidatio n o f Fin e Sla g a t th e Railroa d Easement Nea r McWeth y Driv e t o 12t h Street

, Leadville

, Colorado

. Jul y 20,1998

. Environmenta l Resource s Managemen t (ERM)

. 1997

. Verificatio n Repor t f o r th e Consolidatio n o f Fin e Sla g a t th e Denver & Ri o Grand e Wester n Railyard

, State Highwa y 2 4 an d 12t h Street

, Leadville

, Colorado

. Novembe r 19,1997

. Industria l Compliance

, Inc

. 1995

. Ballas t Operation s Plan

. Jul y 21,1995

. Morriso n Knudse n Corporation

. 1995

. Reconnaissanc e Report

, Californi a Gulc h Railroa d Yar d Area
, prepare d fo r Denve r & Ri o Grand e Wester n Railroad

. Januar y 19

. Morriso n Knudse n Corporation

. 1994a

. Samplin g an d Analysis Plan

, Californi a Gulc h Railroa d Easement

, prepare d fo r Denve r & Ri o Grand e Wester n Railroad

. Septembe r 14

. Morriso n Knudse n Corporation

. 1994b

. Reconnaissanc e Report

, Californi a Gulc h Railroa d Easement

, prepare d fo r Denver & Ri o Grand e Wester n Railroad

. Novembe r 11

. Morriso n Knudse n Corporation

. 1992a

. Fina l Repor t fo r Lea d Sla g Pil e Remedia l Investigatio n a t th e Californi a Gulc h Site

, Leadville

, Colorado

, prepare d fo r Denve r & Rio Grand e Wester n Railroad

. Decembe r 11

. Morriso n Knudse n Corporation

. 1992b

. Fina l Repor t fo r Zin c Sla g Pil e Remedia l Investigatio n a t th e Californi a Gulc h Site

, Leadville

, Colorado

, prepare d fo r Denve r & Ri o Grand e Wester n Railroad

. Decembe r 11

. 

### Morriso n Knudse n Corporation

. 1991

. Work Pla n fo r Sla g Pil e Remedia l Investigatio n a t Californi a Gulc h Site

, Leadville

, Colorado

, prepare d fo r Denve r & Ri o Grand e Wester n Railroad

. October

.

ENVIRONMENTA

L RESOURCE S MANAGEMEN

T 2 0

P:\1000\UNIONPAC\1997\CALGULCH\FINALRPT.DO CTerranext

.

1996a

. Fina l Stockpile d Fin e Sla g Feasibilit y Study

, prepare d 

### fo r Denve r & Ri o Grand e Wester n Railroad

. Ma y 13

. Terranext

. 1996b

. Wor k Pla n Consolidatio n o f Fin e Slag

. Prepare d fo r Denve r & Ri o Grand e Wester n Railroad

. Novembe r 12

. 

### U.S

. Distric t Cour t fo r th e Distric t o f Colorado

, 10t h CIR

. 1993

. State o f Colorad o vs
. ASARCO

, Inc.
, e t al.
, Consen t Decre e wit h Denve r an d Ri o Grand e Wester n Railroad

. Environmen t an d Natura l Resource s Division

. Septembe r 15

. U.S

. Environmenta l Protectio n Agenc y (EPA)

. 1998

. Record o f Decision

, Stockpile d Fin e Slag

, Arkansa s Valle y Sla g Pile

, Californi a Gulc h Superfun d Sit e (Operabl e Uni t 3)
, Leadville

, Colorado

. May

. U.S

. Environmenta l Protectio n Agency (EPA)

. 1993

. Fina l Screenin g Feasibilit y Stud y fo r Remediatio n Alternative s a t th e Californi a Gulc h NP L Site

, Leadville

, Colorado

. September

. U.S

. Environmenta l Protectio n Agency (EPA)

. 1991Preliminar y Huma n Healt h Baselin e Ris k Assessmen t fo r th e Californi a Gulc h NP L 

### Site

, Leadville

, Colorado

, Prepare d b y Roy F

. Weston
, Inc

. fo r U.S

. Environmental Protectio n Agency

. December

.

ENVIRONMENTA

L RESOURCE S MANAGEMEN

T 2 1

P:\1000\UNIONFAC\1997\CALGULCH\nNALRPT.DO C

# Appendix

A 

# Work Plan: Harrison Street Slag Pile ClosureUnio n

Pacifi c Railroa d Compan y 

# Wor k Pla n Harrison Street Slag Pile Closure Intersection of Harrison and Monroe Streets Leadville, Colorado Novembe r 12 , 199 8

Submitte d to : Unite d State s ER A Regio n Vli l 9 9 9 18 t h Stree t Denver

, Colorad o 8020 3 Prepare d for : Unio n Pacifi c Railroa d Compan y 141 6 Dodg e Stree t Omaha

, Nebrask a 6817 9

Environmenta l Resource s Managemen t 595 0 Sout h Willo w Drive

, Suit e 20 0 Greenwoo d Village
, Colorad o 8011 1 (303)741-505 0 

# ER M

### TABLE

OF CONTENTS

1.0 INTRODUCTION

1 1.1 PURPOSE 1 1.2 PROJECT BACKGROUND 1 2.0 SITE HISTORY 2 2.1 SITE DESCRIPTION 3 3.0 SUMMARY OF PREVIOUS INVESTIGATIONS

4 4.0 SCOPE OF WORK 8 5.0 REFERENCES 9 LIST OF APPENDICES 

### Appendix A Example Deed Restriction

### 1.0 INTRODUCTION 

### Denve r an d Ri o Gran d Wes t Railroa d (D&RGW ) ha s relocate d th e lea d slag pil e formerl y locate d a t th e Northeas t corne r o f th e intersectio n o f Harriso n Stree t an d Monro e Stree t i n Leadville

, CO

. Th e Harriso n Stree t 

### (HS ) sla g pil e ha s bee n consolidate d ont o th e Arkansa s Valle y (AV ) sla g pile

. Th e Unite d State s Environmenta l Protectio n Agenc y (ERA ) ha s determine d tha t a cove r laye r o f fil l materia l mus t b e place d over th e 

### locatio n o f th e forme r H S slag pil e befor e clean-u p i s considere d complet e a n d D&RGW's responsibilit y pursuan t t o th e Consen t Decre e betwee n D&RG W an d th e Unite d State s hav e conclude d wit h respec t t o th e 

### Harriso n Stree t property

. D&RGW ha s develope d thi s Wor k Pla n t o describ e th e fiel d wor k necessar y t o complet e th e project

.
1.1 PURPOSE 

### T h e H S Sla g pil e i s par t o f D&RGW' s Operabl e Uni t 3 (OU3 ) responsibilitie s 

### f o r th e Californi a Gulc h Superfun d Sit e pursuan t t o it s Consen t Decre e wit h t h e Unite d States

. OU 3 include s th e H S sla g pile
, th e A V sla g pile
, th e L a 

### Plat a sla g pile
, an d D&RGW s rail easemen t an d railyar d i n th e town o f Leadville

. By relocatin g th e sla g pil e an d providin g a workpla n fo r th e completio n o f closur e activities , D&RG W i s in complianc e wit h th e Consen t 

### Decre e fo r remediatio n o f th e H S sla g pile are a o f OU3

.
1.2 PROJECT

BACKGROUND 

### UPR R subcontracte d ER M Rock y Mountai n t o relocat e th e H S slag pile

. T h e projec t too k plac e fro m Septembe r o f 199 7 throug h Marc h o f 1998 , 

### durin g whic h approximatel y 104,00 0 C Y o f sla g wa s moved t o th e Arkansa s Valle y Sla g Pil e (AV)

. A Record o f Decisio n (ROD ) issue d b y E R A i n Ma y o f 199 8 ha s selecte d a N o Actio n Alternativ e fo r th e stockpile d 

### fine s (les s tha n 3/8 " diameter ) a t th e A V sla g pile

. Sectio n 2. 0 provide s a descriptio n o f th e sit e an d it s history

. Sectio n 3. 0 provide s a summar y o f th e previou s investigatio n work

. Sectio n 4. 0 describe s th e scop e o f wor k fo r th e completio n o f activitie s an d present s t h e projec t schedule

.

ENVIRONMENTA

L RESOURCE S MANAGEMENT

. 1 P:\1000\UNIONPAC\CALGULCK\WPLN-HS2.DO C

### 2.0 SITE

HISTORY 

### T h e Californi a Gulc h Superfun d Sit e (whic h encompasse s th e tow n o f Leadville

, Colorad o a s wel l a s surroundin g areas ) i s locate d 

### approximatel y 10 0 mile s southwes t o f Denver

, CO

, a t a n elevatio n o f 10,00 0 fee t mean se a level

. Th e are a ha s experience d 13 0 years o f mining an d smeltin g activities

. I t wa s place d o n th e Nationa l Prioritie s lis t i n 198 3 du e t o extensiv e drainag e o f acid-meta l lade n wate r int o th e Arkansa s River

. 

### Throughou t th e area , silver
, gold
, copper , lea d an d zin c wer e mine d b y undergroun d an d place r method s fro m majo r sulfid e an d carbonat e or e deposits

. T o extrac t metal s fro m lea d ore , th e or e wa s fe d t o a blas t o r reverberatory furnac e (smelter ) wher e th e metal s wer e remove d a s 

### oxidize d vapors

. On e byproduc t o f thes e processe s i s lea d slag

. Sla g i s a dar k vitreou s materia l tha t is compose d primaril y o f iron , magnesium , calcium
, an d silica
, wit h residua l heav y metals

. Sla g is har d an d relativel y 

### dens e an d generall y exist s a s lava-lik e roc k layer s o r block y an d angula r materia l generall y foun d ver y nea r th e smelte r areas
. A s man y as 1 7 smelte r facilitie s have been reporte d t o hav e operate d i n th e Californi a Gulc h area
. 

### Althoug h smeltin g operation s n o longe r exis t i n Leadville

, slag pile s ca n stil l b e see n throughou t th e minin g district

. Th e D&RGW own s thre e sla g pile s (i.e.
, Arkansa s Valley
, L a Plata

, an d Harriso n Street ) associate d wit h t h e Californi a Gulc h site

. Th e H S sla g pil e wa s purchase d fro m N L Industrie s i n 1983, an d th e A V pil e wa s purchase d fro m ASARC O i n 1961

. 

### T h e histor y o f th e slag pil e starte d whe n Harriso n Reductio n Work s (HRW ) bega n operation s a s a carbonat e or e smeltin g facilit y withi n 

### Leadville cit y limit s i n 1877

. Th e locatio n o f th e smelte r wa s o n th e Northeas t corne r o f Harriso n Avenu e an d El m Street

. By 1883 , th e HR W 

### smelte r installe d roastin g furnace s t o proces s sulfid e ores
. I n 1887 , a doubl e elevato r wa s installe d t o increas e th e heigh t o f th e slag pile outsid e th e facility

. Th e HR W smelte r close d i n 189 3 durin g th e silve r panic

. (MK

, 1992 ) 

### Durin g th e nex t centur y th e productio n o f or e fro m loca l mine s decrease d dramatically
, an d a n attemp t was mad e t o rewor k man y o f th e ol d sla g pile s lef t by th e smelters

. I n 1917, Harriso n Recover y Work s wa s establishe d t o rewor k th e H S sla g pile
, which wa s estimate d t o b e greate r tha n 1 millio n ton s a t th e time

. (MK

, 1992 ) T h e H S slag pil e wa s purchase d b y D&RG W i n 198 3 fo r us e a s ballas t 

### production

. Th e origina l sla g pile range d fro m 2 0 - 5 0 fee t i n height
, an d
covere d a n are a o f approximatel y 3 acres
. Onl y smal l trace s (concret e ENVIRONMENTAL

RESOURCE S MANAGEMENT

. 2 P:\1000\UNIONPAC\CALGULCH\VVPLN-HS2.DO C

### a n d

a fe w bricks ) wer e lef t fro m th e smeltin g facilit y a t th e nort h sid e o f th e pile

. (MK

, 1992 ) 

### Today

, th e pil e an d al l trace s o f th e smeltin g facilit y ar e gone
. Th e H S slag pil e consolidatio n ont o th e Arkansa s Valle y slag pil e wa s complete d i n Marc h 1998

. Th e sit e wor k wil l b e complet e wit h th e installatio n o f a cove r laye r a s describe d i n Sectio n 4.0

.
2. 1 SIT E DESCRIPTION 

### T h e forme r H S slag pil e i s locate d a t th e northeas t corne r o f Harriso n an d Monroe

. Star r Ditc h run s along th e sout h sid e o f th e forme r pile
, an d a ga s statio n an d severa l smal l house s ar e locate d immediatel y t o th e north

. Additiona l residence s ar e locate d approximatel y 20 0 yard s t o th e east , a n d commercia l building s an d th e Apach e Tailing s Pond s ar e locate d 20 0 yard s t o th e south

. 

### T h e climat e o f th e are a i s typica l o f th e mountai n region s i n centra l Colorado

. Th e temperatur e extreme s rang e fro m 8 6° F t o -30° F wit h th e averag e dail y minimu m temperatur e bein g 21. 9 °F

. Th e win d i s generall y ou t o f th e northeast
, wit h gust s o f 0 - 3 0 mile s pe r hour

.

ENVIRONMENTA

L RESOURCE S MANAGEMENT

. O

P:\1000\UNIONPAC\CALGULCH\WPLN-HS2.DO C3. 0 SUMMARY

O F PREVIOUS INVEST1GATION

S 

### Stat e o f Colorad o Remedia l Investigation

. 198 6 A t th e tim e o f thi s Rl

, th e State di d no t conside r slag t o b e a significan t sourc e o f contamination , an d th e sla g pile s wer e no t studie d durin g thi s investigation

. E P A Phas e I I Remedia l Investigation

. 198 9 E P A contracte d CH2MHH I t o sampl e th e surfac e water , groun d water , an d
man y min e wast e pile s in th e are a in 1986

. Th e H S slag pil e wa s on e o f t h e lea d sla g pile s sample d i n thi s study

. Sample s wer e analyze d fo r metal s compositio n wit h th e followin g procedures : x-ra y fluorescenc e instrumentation , Extractio n Procedur e Toxicit y Leachin g Characteristic s (EPTOX)

, an d AST M aci d an d wate r shak e extractabl e metal s tests

. Th e 

### result s indicate d tha t th e H S slag pil e (an d als o th e L a Plata slag pile ) exceede d th e RCR A criteri a fo r lead

. Morriso n Knudse n (previou s contracto r fo r D&RGW ) ha s implie d tha t thes e result s ar e unreliabl e du e t o overl y conservativ e testing procedures
, lac k o f representativ e data
, cross-contaminatio n

o f sample s i n th e field
, an d improperl y performe d sampl e collectio n an d testing

. Jame s P

. Wals h an d Associates
, Inc

. Soils Investigation
, 198 8 

### Wals h performe d a n investigatio n fo r ASARC O t o determin e potentia l actio n level s fo r soil
, th e backgroun d concentration s o f metal s i n th e soil
, a n d th e exten t an d possibl e sources o f soi l contamination

. Thre e slag piles
, includin g th e H S sla g pile
, wer e sample d durin g thi s investigation

. Morriso n Knudse n doe s no t repor t th e finding s o f thi s study
, an d dispute s t h e validit y o f th e result s du e t o a lac k o f methodolog y an d qualit y contro l informatio n presented

. Jacob s Engineerin g Sla g Sampling

, 198 9 

### E P A retaine d th e services o f Jacob s Engineerin g t o determin e th e concentratio n o f metals
, migratio n potential
, an d potentia l healt h an d environmenta l hazard s associate d wit h th e thre e sla g pile s owne d b y D&RGW (includin g th e H S slag pile)

. Fou r location s wer e sample d a t th e H S stree t pile
, an d wer e analyze d fo r 2 3 targe t analyt e tes t metals

. Leachabilit y wa s als o analyze d usin g E P toxicit y tests , an d AST M aci d
a n d wate r shak e tests

. Th e result s indicate d tha t meta l concentration s remaine d belo w th e RCR A standards

. However
, th e EP A performe d fiv e additiona l E P toxicit y test s withou t th e knowledg e o f Jacob s Engineerin g o r D&GRW

. Thre e o f th e fiv e EP A tes t result s exceede d th e RCR A standard s fo r lead

. Morriso n Knudse n dispute s th e validit y o f thes e test s ENVIRONMENTA

L RESOURCE S MANAGEMENT

. 4 P:\1000\UNIONPAC\CALGULCH\WPLN-HS2.DO C

### d u e

t o unrepresentativ e samples
, lac k o f qualit y contro l informatio n 

### presented
, an d overl y conservativ e testin g procedures

. Morriso n Knudse n Lea d Slag Pil e Remedia l Investigation

. 199 2 Morriso n Knudse n (MK ) performe d a remedia l investigatio n o f th e lea d sla g pile s i n th e Californi a Gulc h Sit e fo r D&RG W i n 199 1 an d 1992 , unde r Administrativ e Orde r o n Consen t CERCLA-VIII-92006

.

Th e purpos e o f th e stud y wa s t o determin e th e potentia l impact s o f th e sla g pile s o n huma n healt h an d th e environment

. Th e potentia l releas e mechanism s 

### evaluate d were : leaching
, win d erosion , runoff
, an d mixin g b y huma n activities

. 

### Durin g th e reconnaissance , M K examine d th e structura l feature s o f th e slag piles
, includin g beddin g an d layering
, fracture s an d cracks
, join t bloc k boundaries
, an d slop e stability

. Th e pile s wer e surveye d an d mapped
, a n d th e volum e o f eac h pil e wa s calculated

. Th e volum e o f th e H S slag pil e wa s determine d t o b e 104,40 0 CY

. S ix surfac e sample s (0- 3 feet ) an d thre e subsla g sample s (1 1 - 4 7 feet )


### wer e take n fro m th e H S sla g pile

. Result s indicate d tha t th e H S pil e ha d relativel y hig h concentration s o f calcium
, iron , magnesium , manganese , a n d lead

. Th e subslag area range d i n dept h fro m 0.5-1 0 fee t dee p an d 

### consiste d o f fil l overlyin g a thi n laye r o f clayey sil t an d gravel-san d mixture

. Concentration s o f th e fou r metal s o f concer n i n th e thre e subslag sample s a r e show n i n th e followin g table : Sampl e HRB101T1 0 HRB102T1 0 HRB103T2 0 Arseni c

(mg/kg) 27.9 0 19.1 0 <4.0 0 Cadmiu m

(mg/kg ) <0.4 0 <0.4 0 10.00 Lea d

(mg/kg ) 79 4 29 0 21 2 Zin c

(mg/kg ) 129 0 50 4 64 7 

### Subsla g sample s wer e collecte d fro m th e othe r pile s i n th e Californi a Gulc h Sit e a s well
, bu t th e concentration s o f cadmium
, lead
, an d zin c i n 

### t h e subsla g a t th e Harriso n Stree t pile wer e th e highest

. Th e natura l soi l beneat h borin g HR10 3 ha s a lea d concentratio n o f 21 2 mg/kg
, an d i t ha s bee n indicate d tha t th e soil s beneat h al l o f th e slag pile s hav e metal s concentration s simila r t o backgroun d values

. 

### T h e stud y determine d tha t th e onl y viabl e releas e mechanis m fo r th e lea d sla g pile s i n th e Californi a Gulc h Sit e wa s leaching o f metal s throug h contac t wit h precipitatio n o r othe r sit e waters

. ENVIRONMENTAL

RESOURCE S MANAGEMENT

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### Site-Wid

e Screening Feasibilit y Stud y (SFS)

, 199 3 T h e SF S complete d i n Marc h o f 199 3 wa s a join t effor t betwee n th e Potentiall y Responsibl e Partie s (PRPs ) an d EPA

. Th e purpos e o f th e SF S
wa s t o screen severa l remediatio n alternative s for
, amon g othe r things
, sla g locate d a t th e A V sla g pil e base d o n th e followin g criteria : overal l protectio n o f huma n healt h an d th e environment , complianc e wit h Applicabl e o r Relevan t an d Appropriat e Requirement s (ARARs)

, lon g ter m effectivenes s an d permanence , reductio n o f toxicity , mobilit y an d volume
, shor t ter m effectiveness
, implementability
, cost , stat e acceptance , an d communit y acceptance

. Th e thre e alternative s retaine d fo r furthe r evaluatio n were : n o action , institutiona l controls
, an d resourc e utilization

. E P A Baselin e Huma n Healt h Ris k Assessment
, 199 5 b
, c Afte r identifyin g th e primar y chemical s o f potentia l concer n a t th e sit e t o b e lea d an d arsenic , th e risk assessmen t focuse d o n potentia l risk s t o resident s an d recreationa l user s an d workers

. I n al l scenarios , i t wa s determine d tha t exposur e pathway s wer e mos t likel y insignificant
, excep t i n th e cas e o f resourc e utilizatio n o f th e fin e slag
, whic h coul d resul t i n th e releas e o f particulates

. However
, dus t spraying an d appropriat e surfac e wate r managemen t woul d limi t exposur e during possibl e resourc e utilizatio n activities

. E P A Baselin e Aquati c Ecologica l Risk Assessment
, 199 5 d E P A Ecologica l Risk Assessmen t fo r th e Terrestria l Ecosystem

, 199 7 

### E P A determine d tha t risk s t o aquati c an d terrestria l ecosystem s wer e insignifican t du e t o th e lac k o f migratio n pathway s fo r metal s o f concer n an d th e absenc e o f viabl e habitat s an d sustenanc e in th e sla g piles

. D&RGW Feasibility Stud y o f Stockpile d Fin e Slaq

, 199 6 

### Thi s feasibilit y stud y focuse d o n th e stockpile d fin e sla g a t th e A V sla g pile
, an d th e thre e potentia l remediatio n alternative s retaine d fro m th e SFS

. Th e alternativ e recommende d wa s th e n o actio n plan

. E P A Recor d o f Decisio n fo r Stockpile d Fin e Sla g i n th e Arkansa s Valle y Smelte r Slag Pile

, 199 8 T h e ROD release d i n 199 8 concurre d wit h th e result s o f th e D&RG W Feasibilit y Stud y o f 199 6 an d recommende d a n o actio n pla n fo r stockpile d fine s in th e A V sla g pile

. Th e RO D als o include d a n optio n o f resourc e utilizatio n dependen t o n th e futur e marke t valu e o f th e fin e slag
, ENVIRONMENTA

L RESOURCE S MANAGEMENT

. 6 P:\1000\UNIONPAC\CALGULCH\WPLN-HS2.DO C

### whic h

wil l have t o b e encapsulate d befor e possibl e us e a s fil l o r concret e aggregate

. Th e RO D state d tha t a n o actio n pla n wa s protectiv e o f huma n healt h an d th e environmen t becaus e n o complet e exposur e pathway s 

### (includin g leachin g o f metal s throug h contac t wit h precipitatio n o r othe r sit e waters ) exist

.

ENVIRONMENTAL

RESOURCE S MANAGEMENT

. /

P:\1000\UNIONPAC\CALGULCH\WPLN-HS2.DO C4.0 SCOPE

OF WORK 

### T h e scop e o f wor k fo r thi s projec t involve s applicatio n o f a soi l cove r over 

### t h e area o f th e forme r H S sla g pile

. Th e area o f th e slag pil e wil l b e mapped
, an d cove r wil l b e applie d t o a dept h o f a t leas t si x inches

. Th e are a i s estimate d t o b e approximatel y 250,00 0 ft 2 

### an d wil l requir e 

### approximatel y 510 0 yd 3 

### o f soi l fo r th e cover
. Visua l inspectio n an d documentatio n wil l b e conducte d t o ensur e tha t adequat e dept h o f cover i s applied

. Alternatively
, asphal t ma y b e use d a s cove r instea d o f soil

. Th e propert y m a y b e grade d prio r t o coverin g i f necessar y fo r th e intende d futur e us e o f 

### t h e site

. I f asphal t is used
, i t wil l b e applie d t o a thicknes s o f a t leas t fou r inches

. Visua l inspectio n an d documentatio n wil l verif y tha t appropriat e gradin g an d paving method s hav e been sufficientl y completed

. 

### T h e propert y ma y b e sol d t o anothe r owne r fo r development

. I f th e propert y is sold
, completio n o f thi s workpla n wil l b e include d a s a 

### conditio n o f th e sale

. Sal e o f th e propert y prio r t o cappin g wil l allo w a ne w owne r t o grad e th e propert y fo r fina l use
. Th e ca p ca n the n b e applie d followin g grading

. A Dee d Restrictio n simila r t o th e documen t provide d a s Appendi x A wil l b e include d a s par t o f an y propert y transaction

. Completio n o f th e cover installatio n an d cove r inspectio n wil l b e 

### documente d i n a phot o log

. Th e phot o lo g an d inspectio n measurement s shal l b e submitte d t o ER A a s par t o f a fina l verificatio n repor t fo r th e 

### Harriso n Stree t Sla g Pil e Closure

.

ENVIRONMENTA

L RESOURCE S MANAGEMENT

. 8 P:\1000MJNIONPAC\CALGULCH\WPLN-HS2.DO C

### 5. 0 REFERENCES 

### M K (Morriso n Knudsen) 1992

. Final Report fo r Lead Slag Pile Remedial Investigation a t the California Gulch Site, Volum e 1, Leadville

, Colorado

. Prepare d b y Morriso n Knudse n Corporatio n fo r Denve r & R i o Gran d Wester n Railroa d Company

, Decembe r 11 , 1992

. E R A 1998

. Recor d o f Decision : Stockpile d Fin e Slag

, Arkansa s Valle y Smelte r Sla g Pile

, Californi a gulc h Superfun d Sit e (Operabl e Uni t 3)
, Leadville

, Colorado

. Ma y 1998

.

ENVIRONMENTA L

RESOURCE S MANAGEMENT

. 3 P:\1000\UNIONPAC\CALGULCH\WPLN-HS2.DO C

# Appendix

A Example Deed Restriction

### DEE D RESTRICTIO N Th e followin g propert y was formerl y th e locatio n o f a sla g pil e associate d wit h meta l minin g and smelting

. Sla g i s a har d lava-lik e materia l compose d primaril y o f iron , magnesium , calcium
, silic a an d residua l heav y metals

. Th e sla g pil e wa s removed fro m the property ; however
, som e sla g remain s belo w grade

. The propert y wa s include d a s part o f th e Californi a Gulc h Superfun d Sit e Operabl e Uni t 3

. Th e parce l i s locate d at th e northeas t corne r o f Harriso n an d Monro e i n th e cit y o f Leadville

, Colorado

. Specifically

, th e parce l i s locate d i n th e Southwes t Quarte r o f Sectio n 2 4 an d th e Northwes t Quarte r o f Sectio n 25 , Townshi p 9 South

, Rang e 8 0 West

. (Se e Attache d Drawing ) Base d o n th e presenc e o f belo w grad e sla g an d elevate d concentration s o f lea d i n soi l a t thi s property , EP A ha s require d tha t a fina l cove r b e place d ove r the nativ e soil s on thi s property

. Th e purpos e o f th e cove r i s t o reduc e th e potential'fo r contac t an d exposur e t o sla g an d soil s wit h high concentration s o f lead

. A Fina l Wor k Pla n fo r th e Harriso n Stree t Sla g Pil e Closur e ha s bee n file d wit h th e Unite d State s EP A Regio n VIII

. Th e Work Pla n require s tha t a fina l cove r b e place d ove r the site

. The cove r wil l consist o f
on e o f th e following :
• a minimu m o f si x inche s o f soil
, • a minimu m o f fou r inche s o f asphalt
, o r • a combinatio n o f asphal t fo r som e portion s o f th e propert y an d soi l fo r other portions

. The fina l cove r shal l b e inspecte d a s specifie d i n th e fina l wor k plan

. Upo n completio n o f the work
, disturbanc e o f the cover shoul d b e avoided

. The U S EP A shoul d b e contacte d b y th e owne r prio r t o an y excavatio n o r subsurfac e wor k whic h ma y distur b th e site

. Upo n completio n o f an y futur e subsurfac e work
, the cove r shoul d b e restore d b y the curren t owne r o f the property

.



### DRG2017361 8

### TOTA L SAL E ARE A = 12.4 4 AC

. ± SAL E

ARE A SHOW N SPTCO

. R/ W OUTLINE D NOTE : BEFOR E YO U BEGI N AN Y WORK

. SE E AGREEMEN T FO R FIBE R OPTI C PROVISIONS

. EXHIBI T 'A 1 PACiFI C LEADVILLE,LAK E COUNTY,COLORAD O OPP

. M.P

. 275. 5 - MAI N LIN E (0

. & R.G.W. )

# Appendix

B 

# EPA Approval Letter: Harrison Street 

# Slag Pile Closure Work PlanUNITE 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 80202-246 6



### Pete r Bierbau m OC

T I o i9 < E R M
- Rock y Mountai n 595 0 Sout h Willo w Drive

, Suit e 20 0 

### Greenwoo d Village
, Colorad o 8011 1 R e : Californi a Gulc h Superfun d Site 

### Harriso n Stree t Sla g Closur e Pla n Dea r Peter : 

### T h e purpos e o f thi s lette r is t o approv e you r wor k plan
, submitte d o n Jul y 28 , 1998 , f o r closur e activitie s o n th e Harriso n Stree t Sla g Pile

, Leadville

, Colorado

. W e understan d 

### tha t th e Cit y o f Leadvill e i s purchasin g th e propert y an d wil l plac e a cove r ove r th e nativ e soil s o n th e propert y t o reduc e th e potentia l fo r contact an d exposur e t o sla g an d soil s wit h hig h concentration s o f lead

. W e furthe r understan d tha t th e dee d restriction , include d i n 

### t h e wor k pla n a s Appendi x A
, wil l b e include d a s par t o f an y propert y transaction

. I f yo u hav e an y question s concernin g EPA' s approva l o f thi s wor k plan
, pleas e contac t me at (303 ) 312-6552

. 

### Sincerely

,

Rebecc a J

. TrySma s Projec t Manage r



### cc : Te d Borer

, ER M Gar y Honeyman
, UPR R Rus s Alien
, CDPH E

Printed on Recycled Paper

# Appendix

C Verification Report: Consolidation of Fine Slag, Railyard'Unio n Pacifi c Railroa d Company 

## Verificatio n Repor t Consolidation of Fine Slag 

## Denver & Rio Grande Western Rail Yard State Highway 24 and 12 n 

## Street Leadville, Colorado Novembe r 19, 199 7

Submitte d to : Unite d State s EP A Regio n VII I 9 9 9 18 t h Stree t Denver

, Colorad o 80203 Prepare d for : Denve r & Ri o Grand e Wester n Railroa d 1860 Lincol n Stree t Denver

, Colorad o 8020 3

Environmenta l Resource s Managemen t 595 0 Sout h Willo w Drive

, Suit e 20 0 Greenwoo d Village
, Colorad o 8011 1 (303)741-505 0 

# ER MTABLE

OF CONTENTS l.OINTRODUCTION.................................................^^^
2.0 PROJECTBACKGROUND.....................................................................................................2
3.0 SITE RECONNAISSANCE.....................................................................................................3
4.0 CONSOLIDATION

OF FINE SLAG......................................................................................4 S.OSUMMARY.............................................,.........^^^ LIST OF FIGURES Figur e 1 Railroa d

Yar d Investigatio n Area s Ma p LIST OF APPENDICES Appendi x A Phot o Lo g1.0 INTRODUCTION Pursuan t t o th e term s o f th e December 15 , 199 3 Consent Decree

, th e Denve r an d Ri o Grand e Wester n Railroa d (D&RGW ) prepare d a wor k pla n fo r consolidatio n o f fin e sla g a t th e Leadvill e rai l yar d t o th e Arkansa s Valle y (AV ) Pile

. Th e Unite d State s Environmental Protectio n Agenc y (EPA)

, approve d th e wor k pla n on Novembe r 15 , 1996

. A s specifie d i n the wor k plan
, D&RG W i s required t o submi t a verificatio n repor t t o EP A upo n completio n o f th e consolidatio n activities

. Thi s documen t i s th e verificatio n repor t whic h document s th e completio n o f th e consolidatio n activities

. Sectio n 2. 0 provide s a descriptio n o f projec t background

. Sectio n 3. 0 describe s th e reconnaissanc e activitie s use d t o identif y th e presenc e an d locatio n o f fin e sla g a t th e rai l yard

. Sectio n 4. 0 describes th e sla g remova l an d consolidatio n wor k an d provide s phot o lo g documentation

. Sectio n 5. 0 summarize s th e result s o f th e rai l yar d work

.

ENVIRONMENTA

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P:MOOOMJNIONPAOCA1,GULCH\PHOTOLOG.DO C2.0 PROJECT

BACKGROUND Th e D&RG W rai l yar d i s locate d nea r th e nort h en d o f th e town o f Leadville

, Colorado

, approximatel y 10 0 miles southwes t o f Denver

, Colorad o at a n elevatio n o f 10,000 fee t abov e mea n se a level

. Th e rai l yar d encompasses a n are a o f roughl y 4 3 acre s an d i s crosse d b y abandone d rai l line s an d acces s roads

. A 200-foo t lon g concret e an d earthe n loadin g doc k i s locate d nea r th e sout h en d o f th e property

. Vegetatio n on th e propert y i s limite d t o native grasses , sage , and othe r nativ e plan t species

. Th e rai l yar d i s surrounde d b y a mixture o f residentia l housin g o n th e sout h an d west , commercia l establishment s o n th e north
, an d th e Leadville

, Colorad o & Souther n Railroa d (LCSR ) propert y o n th e east

. Th e rai l yar d i s bounde d b y 1 2 Stree t o n th e south
, Stat e Highway 2 4 o n th e west , 17 t h Stree t o n th e north
, an d th e LCS R propert y o n th e east

. The rai l yar d ha s see n ove r 13 0 year s o f transportatio n activities

. Silver

, gold
, copper , lead
, an d zin c wer e mined b y hardroc k an d place r method s fro m a majo r sulfide/carbonat e or e deposit

. Th e Ya k Tunnel

, drainin g int o Californi a Gulch

, i s th e mai n point-sourc e discharg e o f acidic
, metal-lade n wate r i n Californi a Gulch

. Thi s tunnel drains hardroc k minin g area s wit h high proportion s o f sulfid e minerals

. I n 1983 , Californi a Gulc h wa s place d o n th e EPA' s Nationa l Prioritie s Lis t becaus e o f activitie s associate d wit h th e loadin g o f heav y meta l concentration s t o th e Arkansas River

. T h e D&RG W own s thre e sla g pile s (i.e.
, Arkansa s Valley
, L a Plata

, an d Harriso n Street ) associate d wit h th e Californi a Gulc h site

. Sla g i s on e o f th e by-product s o f lea d or e smeltin g activit y that occurred in-Leadvill e fo r nearl y on e hundre d years
. Sla g i s a dar k vitreous material tha t i s compose d primaril y o f iron , magnesium , calcium
, an d silica
, wit h residua l heav y metals

. Sla g i s har d an d relativel y dens e and generall y exist s a s lava-lik e roc k layers o r blocky and angula r materia l generall y foun d ver y nea r th e smelte r areas
. E P A determine d tha t th e primar y concer n wit h sla g i s th e les s tha n 1/4-inc h particl e size (fin e slag)

. Sla g includin g fin e sla g was presen t i n th e rai l yar d as a resul t o f ove r 10 0 year s o f transportatio n activities

. The rai l yar d sla g consolidatio n projec t addresse d identificatio n an d removal o f sla g t o th e A V Pile

.

ENVIRONMENTA

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T "

) P:\iOOO\QNIONPAC\CAl-GULCH\PHOTOLOG.DO C_ 3.0 SITE

RECONNAISSANCE A reconnaissanc e o f th e rai l yar d wa s conducte d on Septembe r 1 5 an d 16 , 1994

. The rai l yar d propert y wa s divide d int o 2 0 investigativ e area s i n orde r t o systematicall y locat e an d ma p potentia l area s o f concer n a t th e site

. (Se e Figur e 1 ) Fiftee n o f th e investigativ e area s wer e stake d ou t b y field personne l wit h a measurin g tap e an d wer e centere d generall y o n th e loadin g doc k are a o f th e site

. Thes e 1 5 investigativ e area s wer e roughl y 20 0 fee t squar e and wer e labele d unit s A-0

. Area s o f concern appeare d t o b e mor e concentrate d nea r th e locatio n o f th e loadin g dock
, therefore
, th e increase d numbe r o f investigativ e units

. Th e nort h
en d o f th e sit e was divide d int o fiv e investigativ e areas , P-T

. Thes e area s wer e large r i n siz e an d wer e generall y bounde d b y remainin g rai l line s at the site

. Afte r th e investigativ e area s wer e delineated
, th e assessmen t procedure s an d material s inventor y wer e initiated

. Eac h investigativ e are a wa s walke d b y fiel d personne l and an EP A representative

. The tea m mad e not e o f area s o f concern withi n eac h are a an d the n assesse d thes e area s fo r th e presenc e o f sla g material

. Observations o f th e typ e o f proces s material s (i.e.
, cinder
, coal
, charcoal
, clinker
, o r slag ) locate d i n th e area s o f
concern wer e noted

. I f sla g wa s identified
, it s locatio n wa s measure d fro m permanen t landmark s o r fro m are a boundaries

. Th e area l exten t o f th e sla g wa s measure d and an estimat e o f the dept h o f the sla g materia l wa s made

. Sla g wa s readil y identifiabl e b y it s geomorpholog y an d appearance

. I t wa s als o discernibl e fro m othe r materia l suc h a s cinder
, clinker
, and charcoa l on genera l appearanc e and weight alone

. Severa l area s at the rai l yar d wer e foun d t o contai n sla g o f variou s sizes

. The area s o f concern totale d 2. 3 acres, whic h represent s roughl y 5 % o f the tota l rai l yar d property

. Tota l volum e o f sla g a t the rai l yar d sit e wa s estimate d a t 450 cubi c yard s (CY)

. Th e volum e o f fin e sla g (i.e.
, les s than 1/4-inc h particl e size ) o n th e sit e wa s roughl y estimate d at 22 0 CY

. Al l o f the sla g encountere d at the rai l yar d sit e wa s considere d surficial
, havin g a dept h o f u p t o three inches

. I t wa s apparen t that sla g i n area s o f heavie r deposit s wa s bein g use d eithe r a s a ballas t t o hol d trac k i n lin e an d elevatio n o r a s a roa d bas e t o provid e suppor t fo r heav y vehicula r traffic

. Som e surficia l sla g wa s foun d i n th e are a o f th e loadin g doc k wher e th e transpor t activitie s provide d som e spillage

.

ENVIRONMENTA

L RESOURCE S MANAGEMEN

T
- }

P:\1000\UNIONPAC\CALOULCH\PHOTOLOG.DO C4.0 CONSOLIDA

TION OF FINE SLA G Remova l o f fin e sla g wa s conducte d durin g th e summe r an d fal l o f 1997 , A s discusse d i n th e wor k plan
, n o attemp t wa s mad e t o separat e fin e fro m coars e sla g durin g th e consolidatio n operation

. Sla g identifie d fro m th e reconnaissanc e wor k wa s remove d fro m th e rai l yar d an d place d o n the A V Pile

. A fron t en d loade r wa s use d t o scrap e sla g fro m the surfac e o f the rai l yard

. The sla g wa s loade d int o dum p truck s an d haule d t o the A V Pil e an d place d o n th e pile

. Th e few area s whic h coul d no t b e reache d b y th e fron t en d loade r because o f the presenc e o f tracks
, wer e han d shovele d t o remov e slag

. Th e initia l sla g consolidatio n wor k wa s conducte d durin g Jul y o f 1997

. O n Augus t 28,1997 , a n inspectio n o f the rai l yar d wa s conducte d b y Mr

. Pete r Bierbaum

, o f ER M Rock y Mountain (representin g D&RGW)

, Mr

. Ori n Diedric h
o f Diedric h Constructio n (th e remova l contractor)
, Mr

. Mik e Holme s an d Ms

. Rebecc a Thoma s o f EPA

, an d Mr

. Rus s Alie n o f th e Colorad o Departmen t o f Public Healt h an d Environmen t (CDPHE)

. Th e grou p conducte d a visua l surve y o f th e sit e identifyin g remainin g area s o f slag

. Alon g wit h th e visua l inspection , a n XR F surve y o f si x location s wa s conducte d b y a samplin g tea m fro m th e Burea u o f Reclamation

. The XR F surve y confirme d tha t visua l and physica l inspectio n coul d b e use d t o clearl y distinguis h betwee n sla g and othe r material s presen t i n the yar d suc h a s coa l and cinders

. The Augus t 28t h surve y identifie d si x area s requirin g furthe r sla g removal :
• Are a C
— The acces s roa d int o th e rai l yar d fro m 12t h stree t containe d surficia l sla g material

. • Are a D
— Slag wa s stil l presen t on th e portio n o f th e acces s roa d whic h crossed th e track s jus t befor e th e loadin g dock

. • Are a H
— Surficia l sla g wa s identifie d o n th e loadin g dock

. • Are a K
— Surficia l sla g wa s presen t i n the are a nort h o f the loadin g dock

. • Are a N
— A smal l pil e o f coars e sla g wa s identifie d beneat h th e tracks adjacen t t o th e switch

. • Are a Q
— A smal l pil e o f coars e sla g nea r a trac k an d a large r are a o f surficia l sla g (approximatel y 75 b y 10' ) wer e identifie d i n thi s area
. Additiona l sla g remova l wa s conducte d o n Septembe r 19 ! an d 22 n followe d b y a sit e surve y performe d o n Septembe r 23 rd

. Th e sit e surve y wa s conducte d b y Mik e Holmes
, Rus s Alien
, Pete r Bierbaum

, an d Ori n Diedric h an d consiste d o f a visua l
ENVIRONMENTA L RESOURCE S MANAGEMEN T A

P:MOOO\UN1ONPAC\CALGULCH\PHOTOLOG.DO Cinspectio n

o f th e remainin g sla g areas
. Mino r additiona l remova l wor k wa s identifie d i n three area s t o assur e tha t al l fin e sla g had bee n removed

. The fina l
remova l wor k wa s conducte d on Octobe r 4 and Mr

. Bierbau m performe d a fina l inspectio n o n Octobe r 9 , 1997

. T h e phot o lo g attache d a s Appendi x A document s th e fiel d wor k describe d abov e an d provide s a visual lo g o f th e fina l conditio n o f th e area s fro m whic h sla g was removed

.

ENVIRONMENTA

L RESOURCES MANAGEMEN

T £

P:\IOOO\UN1ONPAGCALGULCH\PHOTOLOG.DO C5.0 SUMMARY Sla g wa s readil y identifiabl e an d discernibl e fro m coal
, cinder
, clinke r an d soil s base d o n genera l appearanc e an d weight

. XR F surve y wor k confirme d physica l observations

. Fin e sla g wa s identifie d durin g th e reconnaissanc e conducte d in February 1995

. Remova l activitie s wer e complete d b y Octobe r 4 , 199 7 and a fina l sit e inspectio n wa s conducte d o n Octobe r 9, 1997

. Al l area s o f fin e sla g hav e bee n remove d fro m the sit e and consolidate d o n the A V Pil e i n accordanc e wit h the Decembe r 15 , 199 3 Consen t Decree

. A tota l o f approximatel y 1,26 4 cubi c yard s o f sla g wer e consolidate d t o th e A V Pile

. A s a result
, D&RG W ha s complete d th e wor k t o b e performe d o n th e rai l yar d a s require d b y th e Consen t Decree

.

ENVIRONMENTA

L RESOURCES MANAGEMEN

T r

P:\IOOO\UNIONPAC\CALOU1-CH\PKOTOLOG.DO C

# Appendix

D Deed Restriction: Former Location of 

# Harrison Street Slag Pile and Adjacent Area

### DEE D RESTRICTIO

N T h e followin g propert y was formerl y th e locatio n o f a sla g pil e associate d wit h meta l minin g and smelting

. Sla g i s a har d lava-lik e materia l compose d primaril y o f iron , magnesium, calcium
, silic a an d residua l heav y metals

. The sla g pil e wa s remove d fro m th e property ; however
, som e sla g remain s belo w grade

. Th e propert y wa s include d a s par t o f th e Californi a Gulc h Superfun d Sit e Operabl e Uni t 3

. Th e parce l i s locate d a t th e northeast corne r o f Harriso n and Monro e i n the cit y o f Leadville

, Colorado

. Specifically

, th e parce l i s locate d i n th e Southwes t Quarter o f Sectio n 2 4 an d th e Northwes t Quarte r o f Sectio n 25 , Townshi p 9 South

, Rang e 8 0 West

. (Se e Attache d Drawing ) Base d o n th e presenc e o f belo w grad e sla g an d elevate d concentration s o f lea d i n soi l a t thi s property , EP A ha s require d tha t a fina l cove r b e place d ove r th e native soil s o n thi s property

. The purpos e o f the cove r i s t o reduc e the potentia l fo r contac t and exposur e t o sla g an d soil s wit h hig h concentration s o f lead

. A Fina l Wor k Pla n fo r th e Harriso n Stree t Sla g Pil e Closur e ha s bee n file d wit h th e Unite d State s EP A Regio n VIII

. Th e Wor k Pla n require s tha t a fina l cove r b e place d ove r th e site

. Th e cove r wil l consist o f
one o f the following : • a minimu m o f si x inche s o f soil
, • a minimum o f fou r inche s o f asphalt
, o r • a combinatio n o f asphal t fo r som e portion s o f th e propert y an d soi l fo r othe r portions

. Th e fina l cove r shal l b e inspecte d a s specifie d i n th e fina l wor k plan
, Upo n completio n o f th e work
, disturbanc e o f th e cove r shoul d b e avoided

. The U S EP A shoul d b e contacte d b y th e owne r prio r t o an y excavatio n o r subsurfac e wor k whic h ma y distur b th e site

. Upo n completio n o f an y futur e subsurfac e work
, the cove r shoul d b e restore d b y the curren t owne r o f th e property

.



### DRG2017361 8

# Appendix

E Work Plan: Consolidation of Fine Slag, Railroad EasementUnio n Pacifi c Railroa d Compan y 

## Wor k Pla n Consolidation of Fine Slag Railroad Easement NearMcWethy Drive to 12 th 

## Street Leadville, Colorado Jul y 20,199 8

Submitte d to : Unite d State s EP A Regio n VII I 99918 t h Stree t Denver

, Colorad o 8020 3 Prepare d for : Unio n Pacifi c Railroa d Compan y 141 6 Dodg e Stree t Omaha

, Nebrask a 6817 9

Environmenta l Resources Managemen t 595 0 Sout h Willo w Drive

, Suit e 20 0 Greenwoo d Village
, Colorad o 8011 1 (303 ) 741-505 0



# m 

# ER M DRG2017446

4_ TABLE O F CONTENT S' -

- 1. 0 INTRODUCTIO

N 2 2. 1 PURPOS E 2 1. 2 PROJEC T BACKGROUN

D 2

~ ~ 2. 0 SIT E DESCRIPTIO

N 3

_ _ 3. 0 SUMMARY O F RECONNAISSANC

E WOR K 5 3. 1 METHOD 5 3. 2 RESULT S 5

- 4. 0 SCOPE O F WORK 7 4. 1 APPLICATIO

N FO R ABANDONMEN

T 7 4. 2 REMOVA L O F RAIL S AN D TIE S 7

~ 4. 3

BALLAS

T CONSOLIDATIO

N 8

_ 4. 4 COMPLETION O F MINERAL BELT TRAI L 8

_ LIS T O F FIGURE S Figure 1 Railroad Right of Way Figure 2 Project Schedule



### DRG20174465- 1.0 INTRODUCTION Lak e County

, th e Environmenta l Protectio n Agenc y (EPA ) an d Unio n Pacifi c Railroa d (UPRR ) hav e agree d t o collaborat e o n a projec t t o conver t a sectio n o f railroa d right o f wa y i n Leadvill e int o a multipurpos e trai l a s par t o f th e Minera l Bel t Trai l Project

. UPR R ha s develope d thi s Wor k Pla n in conjunctio n wit h th e Minera l Bel t Trai l Phas e I I Constructio n Drawing s prepare d b y Conli n Associate s t o describ e th e fiel d wor k necessar y t o complet e th e project

. Thi s wor k pla n establishe s th e metho d b y whic h UPRR' s railroa d righ t o f wa y in th e tow n o f Leadville / Colorado

, wil l b e converte d t o a segmen t (Phas e II ) o f th e trail

.

- 1.1 PURPOSE T h e railroa d righ t o f wa y fro m McWeth y driv e t o th e Railyard

, locate d a t 12t h Stree t an d Highwa y 2 4 in Leadville / i s par t o f UPRR' s Operabl e Uni t 3 (OU3 ) responsibilitie s fo r th e Californi a Gulc h Superfun d Site

. By supportin g th e trai l project , UPR R creates a n ongoin g beneficia l us e fo r th e railroa d righ t o f wa y whic h i s protectiv e o f huma n healt h an d th e environment

.
1.2 PROJECT

BACKGROUND Pursuan t t o th e term s o f th e Septembe r 15/199 3 Consen t Decree

, th e Denve r & Ri o Grand e Railroa d (D&RGW ) prepare d a Samplin g an d Analysi s Pla n (Septembe r 14/1994 ) fo r identifyin g th e presenc e o f fin e sla g a t th e Leadvill e railroa d righ t o f way
. Th e samplin g pla n describes th e fiel d activitie s fo r a non-intrusiv e reconnaissanc e o f th e railroa d righ t o f way
. Tw o personne l fro m Morriso n Knudse n conducte d th e fiel d reconnaissanc e o n Septembe r 16,1994

. Individual s fro m Jacob s Engineerin g an d EP A provide d oversight

. Th e result s o f th e fiel d activitie s ar e documente d i n a Januar y 199 5 Reconnaissanc e

Repor t fo r th e Californi a Gulc h Railroa d Easement

. Thi s wor k pla n summarize s th e result s o f th e fiel d reconnaissanc e an d describe s th e additiona l wor k t o b e conducte d b y UPR R t o complet e responsibilitie s unde r th e Consen t Decre e an d th e Statemen t o f Work

. Sectio n 2. 0 provide s a descriptio n o f sit e background

. Sectio n 3. 0 provide s a summar y o f the previou s investigatio n work

. Sectio n 4. 0 describe s the scop e o f wor k fo r consolidatio n o f fin e sla g bac k ont o th e railroa d ballas t
an d present s th e projec t schedule

. 

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DESCRIPTION T h e Californi a Gulc h CERCL A Sit e (whic h encompasse s th e town o f Leadville

, Colorad o a s wel l a s surroundin g areas ) i s locate d approximatel y 10 0 mile s southwes t o f Denver

, CO

, a t a n elevatio n o f 10,00 0 fee t abov e mea n se a level

. The are a ha s experience d 13 0 year s o f minin g an d smeltin g activities

. I t was place d o n th e Nationa l Prioritie s lis t i n 198 3 du e t o extensiv e drainag e o f acid-meta l lade n wate r int o th e Arkansa s River

. Throughou t the area , silver
, gold
, copper , lea d an d zin c wer e mine d b y undergroun d an d place r method s fro m majo r sulfide/carbonat e or e deposits

. T o extrac t metal s fro m lea d ore , th e or e was fe d t o a blas t o r reverberator y furnac e (smelter ) wher e the metal s wer e remove d a s oxidize d vapors

. On e byproduc t o f thes e processe s i s lea d slag
, a hard
, dense
, lava-lik e roc k whic h i s blac k t o dar k gra y i n colo r wit h a metalli c luster

. A s man y a s 1 7 smelte r facilitie s hav e bee n reporte d t o hav e operate d i n th e Californi a Gulc h area
. Sla g wa s use d a s ballas t fo r th e right o f way , an d i t wa s determine d that n o potentia l healt h risk s wer e associate d wit h thi s use
. However
, acceptabl e ballas t i s define d a s materia l whic h i s betwee n 3/ 8 inc h an d 2-1/ 2 inc h diameter

. EP A determine d that th e primar y concern wit h sla g i s th e les s than 1/4-inch particl e siz e (fin e slag)

. Fin e sla g dus t ca n be a potentia l healt h ris k whe n inhaled

. Sla g includin g fin e sla g ma y hav e migrate d of f th e railroa d bed int o th e surroundin g right o f wa y a s a resul t o f ove r 10 0 year s o f transportatio n activities

. Thi s wor k pla n addresse s consolidatio n o f sla g bac k o n t o th e railroa d bed

. The railroa d be d wil l then b e covere d wit h a grave l sub-bas e an d asphal t a s par t o f th e Minera l Bel t Trai l project

. Th e D&RG W railroa d righ t o f wa y i s locate d i n th e tow n o f Leadville

, Colorado

. Th e portio n o f railroa d righ t o f wa y covere d i n th e Decembe r 1993 Consen t Decre e extend s fro m th e railyar d locate d a t 12t h Stree t an d Stat e Highwa y 2 4 t o th e end-of-trac k sign locate d a t McWeth y Drive

. However
, a portio n o f railroa d right o f wa y extendin g beyon d McWeth y Driv e (no t covere d i n the Consen t Agreement ) i s integra l t o the trai l projec t an d wil l b e include d i n th e donatio n t o Lak e County

. Figur e 1 show s the right-of-way whic h wil l b e include d i n the trai l project

. The railroa d righ t o f wa y i s surrounde d b y residentia l areas , a hig h school
, a middl e school
, an d a recreationa l facility

. Th e right o f wa y i s approximatel y 1. 1 mile s long
, and extend s 2 5 fee t fro m th e centerlin e o f th e trac k on eithe r side
, encompassin g approximatel y seven acre s o f land

. Th e right o f wa y ha s no t had rai l traffi c sinc e 1991

.
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no r DRG2017446 7Vegetatio n

i n th e are a o f th e righ t o f wa y i s reporte d t o b e typica l o f th e region

. Plan t lif e varie s fro m har d an d softwoo d tree s t o native grasses , sage , an d othe r nativ e plan t species

. Area s wher e vegetatio n appear s t o b e compromise d ar e reportedl y du e t o pedestria n an d vehicula r traffic
, an d
no t contamination

. Th e climat e o f th e are a i s typica l o f th e mountai n region s i n centra l Colorado

. Th e temperatur e extreme s range fro m 8 6° F t o -30° F wit h th e averag e dail y minimu m temperatur e bein g 21. 9 °F

. Flas h floodin g i s a possibilit y i n the summe r durin g storms , an d the annua l pea k runof f usuall y occur s i n June

.



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P:\1000\UNIONPAC\CALGULCH\WPLAN-EE.DO C3 . 0 SUMMAR Y

O F RECONNAISSANC

E WOR K

3. 1 METHO D Morriso n Knudse n (MK ) performe d a reconnaissanc e o f th e rai l easemen t i n 199 4 o n behal f o f D&RGW

. Durin g th e reconnaissance , M K walke d th e easemen t an d identifie d "area s o f concern/ whic h wer e area s showin g sign s o f cinder
, coal
, charcoal
, clinker
, o r lea d sla g outsid e o f the railroa d bed

. Thes e area s identifie d b y M K ar e the area s o f slippag e whic h wil l
nee d t o b e consolidate d prio r t o th e constructio n o f th e trail

. M K documente d th e location s o f th e area s o f concer n b y assignin g stationin g t o th e cente r lin e o f th e tracks
, wher e 0+0 0 i s locate d a t th e intersectio n o f th e railroa d cente r lin e wit h th e nort h sid e o f 12t h Street

. Th e "En d o f Track " sig n wes t o f McWeth y Avenu e i s assigne d statio n 60+00

. Al l distanc e wer e measure d usin g on e tap e measurer , an d area s o f
concern wer e photographed

. Afte r notin g th e locatio n o f eac h area , M K note d th e material s present

. Whe n lea d sla g wa s identifie d (b y general appearanc e an d weight)
, th e locatio n was mor e precisel y measure d usin g distance s fro m permanen t landmark s or fro m the trac k cente r lin e and easemen t boundaries

. M K als o measured the dept h and aeria l extent o f ever y are a containin g slag

. The percentage s o f sla g fine s i n th e area s o f concer n wer e visuall y estimate d o r measure d b y passin g a representativ e sampl e throug h a 3/ 8 inc h siev e screen
.
3 . 2 RESULT

S M K determine d tha t al l o f th e sla g presen t at th e rai l easement consiste d
o f surficia l deposits

. Th e detail s o f eac h are a o f concern ar e summarize d i n t h e followin g table

.



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P:\1000 \

UN1ONTAC\CALGULCH\VVPLAN-RE.DO CTable

1 Summary of Reconnaissance Work Statio n 2+0 0 4+0 0
6+7 0

8+5 0 10+4 5 12+0 0 19+6 0 14+0 0
19+0 0
22+5 0 betwee n 23+7 5
an d 24+0 0 27+0 0 fro m 27+0 0 t o 31+0 0 an d fro m 20+0 0 t o 32+3 5 33+0 0

between 46+0 0 an d 50+7 5

-

— Sla g Volum e in Locatio n Descriptio n

- Nea r Harriso n Stree t t o Nort h o f track s Nea r library ; 375 lon g x 13 wid e Nea r librar y Are a i s a lon g stri p o f varyin g width s

60 x 30 are a locate d 100 sout h o f middl e school basebal l fiel d locate d o n lo w poin t o f bik e path ; 20x 60

are a i s 50 lon g
37 5 ft ? are a

o n 3 pat h whic h exit s easemen t t o th e nort h sla g i s intermitten t i n thi s are a o n bot h nort h and sout h side s immediatel y wes t o f Jame s Street ; 20 x 2

o n bot h nort h an d sout h sid e o f tracks ; som e larg e isolate d chunk s nea r playgroun d Sout h o f Recreatio n Cente r t o th e wes t o f th e track ; 90 x 6 Severa l path s nea r Recreatio n Center ; 1300 tota l length ; 8 average widt h Area s o f Concer n Sla g

Volum e (Total ) <1C Y <1C Y

22. 6 C Y

- 1 6 C Y
8 C Y 6 C Y <1C Y 2 C Y <1C Y

7 4 C Y <1C Y

3 8 C Y

4 0 C Y

4 8 C Y

19 4 C Y Sla g Dept h Surficia l Surficia l

0- 3 inche s

- - Surficia l Surficia l Surficia l Surficia l Surficia l Surficia l

""" "

"~ " Surficia l

2 fee t

•"" " Fine s

-

- Mostl y fine s (b y visua l inspection )
70 % (b y siev e test ) 8 C Y (tes t no t specified )

3 C Y (siev e test )

2 C Y (tes t no t specified ) al l sla g her e i s fine s (tes t no t specified ) 2 C Y (tes t no t specified ) majorit y o f sla g i s fine s (b y visua l inspection ) 3 7 C Y (b y visua l inspection ) majorit y o f sla g i s fine s (b y visual inspection ) 1 9 C Y (tes t no t specified )

non e majorit y o f sla g i s fine s (b y visua l inspection ) 9 2 C Y M K als o note d tha t mos t o f th e rai l easemen t showe d sign s o f pedestria n o r all-terrai n vehicl e traffic
, and tha t vegetatio n i n the are a appeare d health y an d norma l excep t i n area s wher e man-mad e trail s wer e located

.

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### DRG2017447 0 P:\1000\UNIONPAC\CALGULCH\WPLAN-RE.DO C4.0 SCOPE

OF WORK Th e ke y element s o f th e projec t scop e ar e summarize d i n th e followin g table : Table 2 Summary of Work Tasks Tas k Tas k t o b e complete d by : Tas k t o b e funde d by : Complet e applicatio n fo r abandonmen t o f UPR R

UPR R railroa d right o f wa y an d Surfac e Transportatio n Boar d (STB ) approva l o f th e abandonmen t reques t Remov e rail s and tie s fro m abandone d sectio n Consolidat e ballas t i n area s o f slippag e Transport

, sprea d an d compac t sub-bas e Instal l culvert s Instal l asphal t hard surfac e Instal l signs , centerlin e stripe , an d revegetat e UPP

R UPR R Lak e Count y Lak e Count y Lak e Count y Lak e Count y UPR R

UPR R UPR R UPR R UPR R Lak e Count y Th e role s an d responsibilitie s o f th e partie s hav e bee n define d i n th e Memorandu m o f Understandin g betwee n UPR R an d Lak e Count y o n th e Minera l Bel t Trai l Project

. Eac h tas k i s discusse d i n detai l below

.

- 4.1 APPLICATION

FOR ABANDONMENT Th e combine d Environmental an d Histori c Repor t wa s file d wit h th e ST B

- o n

Apri l 22, 1998. Th e Notic e o f Exemptio n wil l b e file d wit h th e ST B o n approximatel y Ma y 15,1998

. Th e applicatio n i s expecte d t o b e approve d b y Jul y 4,1998

.
4.2 REMO

VAL OF RAILS AND TIES Afte r approva l o f th e abandonmen t applicatio n b y STB

, UPR R trac k abandonmen t personne l wil l procee d wit h removal o f rail s an d ties

. I t i s anticipate d tha t remova l o f rail s an d ties wil l require approximatel y thre e t o fou r weeks

. Wher e feasible
, remove d rail s and tie s wil l b e recycle d or reuse d b y th e remova l contractor

. 

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P:\1000\UNIONPAC\CALGULCH\VVPLAN-RE.DO C4.3 BALLAST

CONSOLIDATION A s discusse d i n Sectio n 3.0 , previou s reconnaissanc e o f th e railroa d right o f wa y identifie d area s o f slippag e wher e th e ballas t ha s migrate d of f th e trac k bed

. Thes e area s wil l b e confirme d b y a visual inspectio n prio r t o beginnin g consolidatio n work

. ERM staf f wil l wal k th e right o f wa y wit h the heav y equipmen t subcontracto r and discus s the area s requirin g consolidation

. Ever y are a wit h ballas t t o b e move d wil l b e excavate d t o a t leas t groun d surface
, an d enoug h soi l wil l b e remove d t o mak e sur e tha t al l sla g fine s ar e removed

. Consolidate d ballas t wil l b e place d o n th e upslop e sid e o f th e trac k be d wher e feasible

. Visua l inspectio n wil l b e conducte d followin g consolidatio n o f sla g t o verif y tha t al l area s o f ballas t slippag e hav e bee n move d bac k ont o th e trac k bed

. UPR R wil l wor k wit h Lak e County' s desig n an d constructio n oversigh t staf f durin g th e initia l phas e o f ballas t consolidatio n t o assure a smoot h transitio n o f constructio n activitie s t o Lak e County

. I t i s anticipate d tha t constructio n o f culvert s b y Lak e Count y contractor s wil l occu r concurrent wit h th e consolidatio n o f ballast

.
4. 4 COMPLETION

O F MINERAL BELT TRAI L Th e remainin g wor k activitie s whic h includ e transportatio n an d compactio n o f sub-base
, installatio n o f culverts
, installatio n o f asphal t surface
, installatio n o f signs , centerlin e stripes , an d revegetatio n wil l b e conducte d b y Lak e Count y i n accordanc e wit h th e Minera l Bel t Trai l Phas e I I Constructio n Drawings

. Figur e 2 provide s a schedul e o f th e overal l wor k activities

.



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# Figures

DRG2017447 3Figur e 1. 0 Railroa d Right-of-Way Fro m Minera l Bel t Trai l Phas e I I Constructio n Drawings

### J L

_ i 

### LEADVILL E RAI L EASEMEN T 1998 PROJEC T SCHEDUL E FIGUR E 2 I D Tas k Nam e M a r A p r M ay J u n J u l A u g S e p Oc t 4 3 4 4

1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 nai l Easemen t Initia l Meetin g (UPRR

, County

, EPA ) Stat e Congressiona l Suppor t Lette r (Lak e County ) Prepar e Environmenta l Report (UPRR ) Fil e Environmental Report (UPRR ) Prepar e Abandonmen t Applicatio n (UPRR ) Fil e Abandonmen t Applicatio n (UPRR ) Abandonmen t Applicatio n Revie w (STB ) Abandonmen t Approva l (STB ) Prepar e MO U (UPRR

, County

, EPA ) Sig n MO U (UPRR

, County

, EPA ) Schedul e Sla g Consolidatio n Contracto r (UPRR ) Schedul e Constructio n Contractor s (Lak e County ) Prepar e Work Pla n (UPRR ) Submi t Work Pla n an d Trai l Desig n (UPRR ) Agenc y Revie w Trail Desig n (Agencies ) Prepar e Fina l Work Pla n an d Trai l Desig n (UPRR ) Fina l Wor k Pla n an d Trai l Desig n (UPRR ) Schedul e Remova l o f Tie s and Rai l (UPRR ) Remov e Tie s an d Rai l (UPRR ) i/2 6

/2 1 6/ 4 $-7/2 7

Project : Date : Th u 5/28/9 8 Tas k

Progress Mileston e Summar y Rolle d U p Tas k Rolle d U p Mileston e Rolle d

U p Progres s Page l 

### DRG2017447 5

### LEADVILL E RAI L EASEMEN T 199 8 PROJEC T SCHEDUL E 

### FIGUR E 2 I D Tas k Nam e M a r M ay J u n J u l 12|13|14|15|16|17|18|19|20|21|22|23|24|25|26|27|28 | A u g I Se p I |32|33|34|35|36|37|38|3 9 Oc

t )41|42|4 3 4 4 2 1 2 2 2 3 2 4 2 5 2 6 2 7 Consolidat

e Fin e Sla g (UPRR ) Instal l Culver t (Lake County ) Donat e Rail Easement (UPRR ) Transpor t an d Compac t Subbas e (Lak e County ) Transpor t an d Compac t Asphal t (LakeCounty ) Instal l Signag e an d Marking s (LakeCounty ) Complet e Trai l Sectio n (Lak e County )

Project : Date : Th u 5/28/9 8 Tas k

Progres s Mileston e Summary

Rolle d U p Tas k Rolle d U p Mileston e O > Rolle d

U p Progress Pag e 2 

### DRG2017447 6

# Appendix

F EPA Approval Letter Work Plan for the Consolidation of Fine Slag, Railroad EasementUN|TE D STATE S ENVIRONMENTA L

PROTECTIO N

AGENC Y

9 9 9 18t h STREE T
- SUIT E 50 0 DENVER

, COLORAD O 80202-2466 

### Ref : 8 EPR-S R 

### Gar y Honeyma n 

### Unio n Pacifi c Railroa d Compan y P.O

. Box B Laramine

, Wyoming 8207 3 R E :

Comment s o n Wor k Pla n f o r th e Railroa d 

### Easemen t near McWeth y Driv e t o 12t h Stree t Dea r Mr

. Honeyman : 

### T h e purpos e o f thi s lette r i s t o commen t o n th e Wor k Pla n fo r th e consolidatio n o f 

### fin e sla g that wa s submitte d t o EP A o n Ma y 28, 1998

. Generally

, w e foun d th e wor k pla n t o b e comprehensiv e an d hav e onl y on e comment

. I n sectio n 1.1 , pleas e delet e th e fina l 

### sentenc e which state s tha t th e consolidatio n o f th e fin e sla g materia l wil l fulfil l UPRR s 

### responsibilitie s unde r th e Consen t Decre e (CD)

. UPR R wil l have fulfille d it s responsibilitie s unde r th e C D whe n UPR R certifie s tha t al l wor k is complet e pursuan t t o Sectio n X V o f th e CD

. Pleas e incorporat e thi s chang e int o th e fina l wor k plan

. I f yo u hav e an y questions , pleas e contac t m e a t (303 ) 312-6552

. 

### Sincerely

, Rebecc a J

. /Thoma s 

### Projec t Manage r

c c : Rus s Alien
, CDPH E Pete r Beirbaum

, ER M DRG2017315 4

# Appendix

G EPA Approval Letters: Completion of 

# Work, Railroad Easement$

15:3 8 FA I 30 3 31 2 830 L L i A tc *



### ^ -_ . UNITE D

STATE S

ENVIRONMENTA L PROTECTIO N

AGENC

Y S L \ REGIO N 8 ^frS. ? 9 " 187 H STFIEE

T
- SUIT E 50 0 ^**W&'j$ DENVER

, C O 60202-246 8 :«* ^ 

## SE

P 2 4 199 6' Ref : EPR-S R Mr

. Stev e Kleeberge r Lak e Count y Roa d and Bridg e Departmen t Leadville

, Colorad o 8046 1 Dea r Mr

. Kleeberger : Thi s lette r i s t o confir m tha t th e U,S

. Environmental Protectio n Agenc y (E P A ) has reviewe d th e dat a fo r lea d sample s taken fro m th e abando n railroa d right-of-wa y betwee n Popla r Stree t and Wes t 6 * Street

. Th e level s o f lea d i n th e soil s are belo w th e level s tha t hav e been determine d acceptabl e fo r recreationa l use s an d i s thu s compatibl e fo r us e a s a bicycl e path

. Th e E P A concur s wit h Lak e County' s developmen t o f th e railroa d right-of-wa y fo r th e .Minera l Bel t Bik e Path

. I f you nee d additiona l assistanc e o r hav e an y question , pleas e cal l m e a t (303 ) 312-6607

. 

### Sincerely

, - Michae l Holme s Projec t Manage r

"Printed o n Recycled PaporUNITE D

STATE S ENVIRONMENTA

L PROTECTIO N AGENC Y REGIO N 6 S 9 9 18 T H STREET
- SUIT E 50 Q DENVER

, C O 8G202-246 S 

### S E P 2 1 Ref ; EPR-S R Mike Conli n Conli n Associate s 8 7 5 Mountain Vie w 'Driv e Leadvilie

, Colorad o 80461

. Dea r Mr
, Conlin ; Thi s lette r i s t o confir m tha t th e U.S

. Environmental Protectio n Agenc y (EPA ) ha s inspecte d th e abando n railroad right-of-wa y fro m jus t wes t o f McWethy Driv e (behin d th e Presbyteria a Church ) t o Jame s Street

. Base d o n the visua l inspectio n o f the propert y conducte d Septembe r 9 an d 10 , 199 8 th e contracto r for Union Pacifi c Railroad ha s complete d th e consolidatio n o f th e sla g alon g thi s portio n o f th e right-a-way
, an d Lak e Count y Road s an d 

### Bridges Departmen t can begi n placin g the roa d base i n preparatio n for the Minera l Bel t Bik e Path

. I f yo u nee d additiona l assistanc e o r hav e an y questions , pleas e cal l m e a t (303 ) 312-6607

. Sincerely

, Michae l Holme s 

### Projec t Manager

Printed on fioeyeter f Papor

# Appendix

H 

# Memorandum of Understanding 

# Between Union Pacific Railroad, Lake County, and the US EPA on the Mineral Belt Trail Project

### Memorandu m

o f Understandin g betwee n Unio n Pacifi c Railroad

, Lak e 

### County

, an d th e U S EP A o n th e Minera l Bel t Trai l Projec t Jul y 9, 199 8 Purpos e Lake County

, th e Unite d State s Environmenta l Protectio n Agenc y (EPA ) an d Unio n Pacifi c Railroa d Company (UPRR ) inten d t o collaborat e o n a portio n o f th e Minera l Bel t Trai l Project

. T h e purpos e o f thi s memorandu m i s t o develo p a commo n understandin g betwee n th e partie s regardin g th e role s an d responsibilitie s o f eac h part y i n th e project

. Wit h thi s memorandu m o f understandin g i n place
, furthe r investment i n th e projec t ca n b e mad e withou t undu e ris k arisin g fro m miscommunicatio n

o f th e collaborators intent

. Projec t Overvie w Lak e County

, EP A an d UPR R inten d t o collaborat e o n thi s projec t becaus e o f it s mutuall y beneficia l goals

. Th e primar y benefi t t o Lak e Count y an d th e communit y i s completio n o f a sectio n o f th e Minera l Bel t Trai l fro m McWeth y Driv e t o th e rai l yard

. Th e primar y benefi t t o UPR R i s t o continue th e beneficia l use o f th e railroa d righ t o f wa y an d t o provid e a cos t effectiv e sit e restoration

. The primar y benefi t t o EP A i s t o obtai n an environmentall y soun d long-ter m restoratio n fo r th e railroa d righ t o f way
. Al l partie s benefi t fro m providin g th e communit y wit h a multi-us e recreationa l trail

. Lak e Count y Projec t Objective s Th e McWeth y Driv e - Rai l Yar d segment provide s a n essentia l sectio n o f th e Minera l Bel t Trai l project

. Fo r a numbe r o f years , communit y leader s hav e bee n workin g towar d th e developmen t
o f a multi-us e trai l t o showcase th e natura l beaut y and historica l significanc e o f th e Leadvill e community

. Th e multi-us e trai l provide s outdoo r recreation , natur e appreciation , an d historica l educatio n opportunities

. UPR R Projec t Objective s T h e railroa d righ t o f wa y fro m McWeth y Driv e t o th e Rai l Yard
, i s part o f UPRR' s Operabl e Unit 3 (O U 3 ) responsibilitie s fo r th e Californi a Gulc h Superfun d Site

. B y supportin g th e trai l project , UPR R create s a beneficia l us e fo r the railroa d righ t o f way , whic h i s protectiv e o f huma n healt h an d th e environment

. Wit h completio n o f th e consolidatio n o f fin e sla g materia l ont o th e roa d bed
, UPR R wil l hav e fulfille d it s responsibilitie s under th e Consen t Decre e an d th e Statemen t o f Wor k i n connectio n wit h al l O U 3 properties

.


### DRG2017325 3Summar y

o f Projec t Scop e K e y element s o f th e projec t scop e ar e as follows :
• Complet e applicatio n fo r abandonmen t o f railroa d right o f wa y an d Surfac e Transportatio n Boar d (STB ) approva l o f th e abandonmen t reques t wit h conditions
, a s appropriat e - UPR R wil l fil e application

. • Remov e rail s an d tie s fro m abandone d sectio n - UPR R wil l remov e tie s an d rails

. • Consolidat e ballas t i n area s o f slippag e - UPR R wil l consolidat e an y ballas t whic h ha s migrate d of f th e trac k subbas e bac k ont o th e upgradien t portio n o f th e roa d be d • Transport

, sprea d an d compac t subbas e - UPR R wil l provid e fundin g fo r a grave l an d fil l
cove r ove r th e ballast

. Lak e Count y wil l perfor m th e transportation , spreadin g an d compactin g o f th e gravel an d fill

. • Instal l culver t - UPR R wil l provid e fundin g fo r installatio n o f culvert s as discusse d i n th e Projec t Financin g Section

. Lak e Count y wil l instal l th e culvert s an d provid e th e necessar y oversigh t • Instal l asphal t har d surfac e - UPR R wil l provid e fundin g fo r installatio n o f th e asphal t har d surface

. Lak e Count y wil l instal l th e asphal t surfac e an d provid e th e necessar y oversight

. • Instal l signs , centerlin e stripe , an d revegetat e - Lak e Count y wil l financ e an d manage an y fina l step s includin g th e aforementione d fo r completio n o f th e trail

. Intende d Role s an d Responsibilitie s Ownershi p an d Propert y Right s Upo n obtainin g necessar y corporat e approvals
, ownershi p o f th e UPR R railroa d righ t o f way , as show n o n the attache d map , wil l b e donate d t o Lak e Count y vi a qui t clai m dee d upo n completio n o f the ballas t consolidatio n an d receip t fro m Lak e Count y o f a n appraisa l o f the propert y an d a n appropriat e releas e an d indemnificatio n that wil l cove r futur e activitie s an d maintenanc e o f th e trail

. UPR R wil l provid e financin g fo r constructio n o f th e subbase
, culvert s an d th e asphal t har d surfac e as discusse d i n Projec t Financing

. Lak e Count y wil l be responsibl e fo r completio n o f th e trai l projec t a s wel l a s long-ter m maintenanc e o f the trail

. Upo n completio n o f th e fin e sla g consolidatio n an d upo n providin g fundin g fo r trai l constructio n a n d donatio n o f th e land
, UPR R wil l hav e fulfille d it s responsibilit y unde r th e Septembe r 15 , 199 3 Consen t Decre e wit h regard s t o th e railroa d right o f way
. Projec t Financing UPR R wil l pa y fo r consolidatio n o f th e fin e slag

. I n addition
, UPR R wil l provid e fundin g i n th e amoun t o f $150,00 0 fo r completio n o f th e trai l includin g installatio n o f compacte d subbase
, culvert s an d asphal t surface

. 

### DRG2017325 4Lak e

Count y wil l pa y fo r an y additiona l cost s associate d wit h completio n o f th e trai l an d fo r long-ter m managemen t an d maintenanc e o f th e trail

. Projec t Desig n Conli n Associate s ha s prepare d a detaile d desig n packag e fo r constructio n o f th e trai l fo r th e railroa d right o f wa y section

. Lake Count y wil l continue t o hav e th e lea d on desig n o f th e trai l project

. UPR R wil l wor k wit h Lak e County' s desig n an d constructio n oversigh t staf f durin g th e initia l phas e o f ballas t consolidatio n t o assure a smoot h transitio n o f constructio n activitie s t o Lak e County

. Permit s an d Require d Approval s EPA

, afte r consultatio n wit h th e Stat e o f Colorado

, mus t approv e th e trai l desig n an d construction

. EP A has expresse d suppor t fo r th e trai l projec t concept

. UPR R wil l hav e responsibilit y fo r submittin g desig n document s an d obtainin g EP A an d Stat e approva l o f th e projec t wit h ke y suppor t provide d b y Lak e Count y (Lak e Count y i s preparin g fina l desig n documents)

. UPR R wil l hav e responsibilit y o f obtainin g approva l fo r th e abandonmen t o f th e sectio n o f th e track

. An y additiona l constructio n approval s o r permit s wil l b e obtaine d b y Lak e County

. Constructio n UPR R wil l b e responsibl e fo r th e initia l constructio n phas e u p t o consolidatio n o f th e fin e sla g ballast

. Lak e Count y wil l assum e constructio n responsibilitie s fo r completio n o f th e project

. Trai l Managemen t Lak e Count y wil l b e responsibl e fo r long-ter m maintenanc e o f th e trail

. Th e Count y wil l b e responsibl e fo r regulatin g publi c us e o f th e trail
, includin g enforcemen t o f restriction s o n invasiv e activitie s (e.g

. digging ) whic h woul d distur b th e covered ballast

. Signature s We
, th e undersigned
, d o hereb y stat e tha t th e informatio n presente d i n thi s memorandu m accuratel y reflect s th e inten t o f ou r respectiv e entities

. fit t , R.D

. Uhric h Ear l Boev e Assistan t Vic e Presiden t Chairman Unio n Pacifi c Railroa d Lak e

Count y Boar d o f Commissioner s 

### DRG2017325 5s S 

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### UNIO N PACIFI C RAILROA D COMPAN Y LEADVILLE

. LAK E COUNTY i COLORADO

- M.P

. 27 5 - LEADVILL E

BRANC H DONATIO N