PROPOSE D REMEDIA L ACTIO N FOR T H E YA K TUNNEL OPERABL E UNI T



### Presented By : Leadvill e Corporatio n Decembe r 7 , 198 7 

### Prepared for publicatio n a s par t o f th e Californi a Gulch Superfun d Sit e Administrativ e

Recor dPROPOSE D REMEDIA L ACTIO N FO R T H E YA K TUKNEL OPERABL E UNI T I

. OVERVIE W 

### Th e purpos e o f thi s documen t i s t o provid e a n outlin e fo r settlemen t discussio n purpose s o f a propose d remedia l actio n that Leadvill e Corporatio n

woul d undertak e wit h respec t t o th e Yak Tunne l operabl e uni t o f th e Californi a Gulc h superfun d sit e (th e "Site")

. Th e proposal
, as outline d i n mor e detai l below
, incorporate s remedia l option s simila r t o thos e se t fort h i n 

### Alternative s 5 and 7 a s describe d i n the Ya k Tunne l Operabl e Unit Feasibilit y Study

, Californi a Gulc h Site

, Jun e 198 7 (th e "FS")

. 

### Furthermore
, th e proposa l i s on e par t o f a permanen t solutio n t o 

### th e Ya k Tunne l discharg e an d woul d b e a firs t ste p i n effectivel y mitigatin g an d minimizin g th e perceive d threat s t o publi c healt h

an d th e environment

pose d b y th e Ya k Tunne l discharge

. 

### Leadvill e Corporation

,

however
, mus t conditio n th e implementatio n o f th e component s o f thi s proposa l o n two requirements

. First

. Leadvill e Corporatio n

require s that prio r t o th e implementatio n

o f th e proposal
, th e U.S

. Environmenta l 

### Protectio n Agenc y (th e "EPA")

, th e U.S

. Departmen t o f Justic e (th e "DOJ" ) an d th e Stat e o f Colorad o (th e "State" ) eac h approv e th e proposa l wit h respec t t o no t onl y th e pendin g CERCL A litigation
, b u t als o Leadvill e Corporation' s

pendin g NPDE S permi t applicatio n 

### f o r th e Diamond Shaf t Min e (th e "Mine")
, i f a NPDE S permi t i s required

. Thi s requirement i s necessar y t o preven t th e Stat e fro m requirin g on e typ e o f actio n i n connectio n wit h th e NPDE S permi t fo r the Mine
, i f necessary , and the EP A and/o r DO J requirin g o r

### takin

g a differen t actio n in connectio n wit h it s fina l remedia l actio n fo r th e Yak Tunne l operabl e unit

. 

### Second

, the EP A and DO J mus t ente r int o a settlemen t agreemen t pursuant t o Sectio n 122 o f th e Superfun d Amendment s an d 

### Reauthorizatio n

Ac t o f 198 6 ("SARA")

, Pub

. L

. No

. 99-499 , whic h wil l b e approve d administrativel

y o r judiciall y an d whic h wil l 

### contain a contributio n protectio n provisio n and a covenant not t o
su e Leadvill e Corporatio n i n connectio n wit h th e Ya k Tunne l operabl e uni t an d th e Stra y Hors e Gulch/Star r Ditc h operabl e unit

. T h e nex t sectio n outline s Leadvill e Corporation' s

involvemen t wit h th e Min e an d th e status o f it s NPDE S permi t applicatio n fo r the Mine

. Thi s wil l b e followe d b y a brie f summar y o f the R I and F S an d o f th e d e minimi s nature o f Leadvill e Corporation' s involvemen t i n th e Ya k Tunne l operabl e uni t an d th e Stra y Hors e Gulch/Star r Ditch operabl e unit

. A detaile d descriptio n o f th e proposa l wil l follow
, includin g ho w th e proposa l incorporate s remedia l option s simila r t o thos e se t fort h i n Alternative s 5 an d 7

. Finally
, thi s proposa l wil l describe th e tw o condition s that th e EPA

, DO J an d Stat e mus t agree t o befor e Leadvill e Corporatio n 

### wil l b e i n a positio n t o undertak e the proposal

. I I

. LEADVILL E

CORPORATION' S

INVOLVEMEN

T WIT H TH E MIN E A N D STATU S OF TH E NPDE S PERMI T 

### Leadvill e Corporatio n acquired th e Min e an d nearb y propert y
o n Jul y 26 , 197 3 b y virtu e o f a Minin g Dee d fro m Rober t L

. Jones

. The Minin g Deed

, a cop y o f whic h i s attache d a s Exhibi t A

. wa s 

### recorde d o n Augus t 23 , 197 3 i n Boo k 40 0 a t Pag e 10 2 o f th e Lake Count y records

. Mr

. Jone s acguire d th e Min e an d surroundin g -2

-

### propert

y fro m America n Smelting an d Refinin g Compan y ("ASARCO" )

an d Resurrectio n

Minin g Compan y a s member s o f a join t ventur e know n as Res-ASARC O Join t Ventur e b y virtu e o f a Minin g Deed

, 

### date d Jun e 8 , 197 3 an d recorde d o n Augus t 23 , 197 3 i n Boo k 40 0 a t Page 9 7 o f th e Lak e Count y records
, a cop y o f whic h i s attache d a s Exhibi t B

. 

### T h e hea d o f th e Yak Tunne l enter s th e Leadvill e Corporatio n propert y acquire d fro m Mr

. Jone s in th e vicinit y o f th e Mine

. 

### Leadvill e Corporation

,

however
, does not own an y interes t i n and t o th e Ya k Tunne l excep t fo r a non-exclusiv e

right t o us e th e tunnel i n connectio n wit h it s minin g operations

. I n fact
, a s on e
can see fro m the deeds
, the conveyance t o Mr

. Jone s and t o 

### Leadvill e Corporatio n

expressl y exclude d th e Ya k Tunnel

. I n th e dee d fro m ASARCO an d th e Resurrectio n

Minin g Compan y t o Mr

. Jones
, ASARC O an d th e Resurrectio n

Minin g Compan y specificall y reserved ownershi p o f th e Yak Tunnel

. 

### I t i s importan t t o not e tha t Leadvill e Corporatio n

ha s neve r exercise d the non-exclusiv e

righ t t o us e the Ya k Tunne l i n connectio n wit h an y o f it s operation s sinc e acquirin g th e Min e i n 1973

. Fro m 197 3 throug h 198 3 Leadvill e Corporatio n

did no t undertak e an y activit y wit h respec t t o the Mine

. Betwee n 198 3 and 

### 198 6 Leadvill e Corporation' s

activit y wa s limite d t o exploration

. I n 198 6 Leadvill e Corporatio n bega n constructio n

t o develo p th e Mine

. Onc e operational
, Leadvill e Corporatio n

wil l no t exercis e 

### th e non-exclusiv e

right t o us e th e Ya k Tunne l i n connectio n wit h i t s minin g operations

. I n fact
, Leadvill e Corporatio n

ca n conduc t
-3

-

### al

l curren t an d futur e operation s at th e Min e withou t th e us e o f t h e Ya k Tunnel

. I n othe r words
, Leadvill e Corporatio n

coul d 

### conduct it s operation s at the Min e eve n i f the Ya k Tunne l di d not exist

. Therefore
, i t i s clea r that Leadvill e Corporatio n

i s no t

a n owne r o r operato r o f th e Ya k Tunnel

. Leadvill e Corporatio n

i s no w i n th e proces s o f developin g th e Min e and anticipate s commencin g commercial minin g operation s i n th e firs t quarte r o f 1988

. Th e Min e wil l produc e approximatel

y 87,50 0 ton s o f gol d or e pe r yea r fro m th e Leadvill e Dolomit e formation

. Th e Mine d Land Reclamatio n Divisio n issue d a Minin g


### an d Reclamatio n Permi t t o Leadvill e Corporatio n fo r th e Min e o n Decembe r 23 , 1986

. I n connectio n wit h th e propose d minin g operation , Leadvill e Corporatio n initiall y was o f th e belie f that a n NPDE S permit was require d fo r th e Min e an d it therefor e file d a n Industria l Wast e 

### Wate r Discharg e Applicatio n (th e "Application")
,

CPD S No

. CO

0041505 , wit h th e Permit s an d Enforcemen t Sectio n o f th e Colorad o Wate r Qualit y Contro l Divisio n (th e "Division")

.

Leadvill e Corporatio n no w believe s that i n connectio n wit h th e propose d 

### operation , a n NPDE S permit i s no t require d becaus e th e minin g operatio n wil l no t resul t i n th e discharg e o f wate r fro m a poin t
source
. Wate r drainin g th e are a o f th e Min e no w leave s th e Leadvill e Corporatio n propert y vi a th e Yak Tunnel

. A s par t o f th e Application
, Leadvill e Corporatio n

submitte d wate r sampl e analyse s 

### fo r seve n Ya k Tunne l wate r sample s that ha d bee n take n b y that

-4

-

### date

.

Copie s o f th e individua l la b analyse s o f th e seven sample s



### and a tabl e summarizin g the result s ar e attache d a s Exhibi t C

. T h e followin g table
, Tabl e 1 , list s th e drinkin g wate r standard s

an d th e average water qualit y o f th e water exitin g Leadvill e Corporatio n propert y vi a th e Ya k Tunne l base d o n th e seve n wate r 

### samples

. TABL E 1 Drinkin g Wate r Standard s Min e Wate r Averag e 

### mg/ 1 Tota l mg/

1 Tota l Cadmiu m (Cd ) 0.0 1

0.001 1 

### Coppe r (Cu ) 1.0 0

0.0191 4 Lea d (Pb ) 0.0 5

0.042 2 Manganes e (Mn ) 0.05 *

0.187 1 

### Mercur y (Hg ) 0.00 2

0.000 2 Zin c (Zn ) 5.0 0

0.256 0 

### * Secondar y Maximu m Containmen t Level T h e wate r qualit y analyse s demonstrat e tha t th e wate r leavin g Leadvill e Corporatio n

propert y b y mean s o f th e Yak Tunne l meet s t h e EP A limit s fo r Drinkin g Wate r Standards

, excep t fo r manganese
. I n respons e t o th e Application
,

th e Division

, in a lette r 

### date d Novembe r 7 , 1986 , a cop y o f whic h i s attache d a s Exhibi t D

. state d that th e discharg e poin t fro m Leadvill e Corporatio n propert y wa s th e Ya k Tunne l Porta l an d no t th e poin t i n th e tunne l 

### th e wate r lef t Leadvill e Corporatio n propert y a t th e head o f th e Y ak Tunnel

. Th e boundar y o f th e Leadvill e Corporatio n

propert y is 

### approximatel y thre e mile s fro m th e Ya k Tunne l Portal

. A s a result
, th e Divisio n state d tha t a s a conditio n fo r receivin g th e -5

-NPDE

S Permi t Leadvill e Corporatio n

woul d hav e t o isolat e flow s fro m it s propert y t o th e porta l o r collec t a simila r volum e o f wate r a t th e porta l an d trea t i t t o prope r effluen t limitations

. A s a n alternative
,

th e Divisio n suggeste d plugging th e Ya k Tunne l

a t a suitabl e locatio n o n Leadvill e Corporatio n

property , pumpin g th e wate r t o th e surface
, treatin g th e wate r t o applicabl e effluen t limitation s

an d dischargin g th e effluen t int o Bi g Evan s 

### Gulch

. Bi g Evan s Gulc h i s a drinkin g wate r suppl y fo r Parkvill e Wate r District

. Tha t Distric t provide s drinkin g wate r t o th e Tow n

o f Leadville

. I n it s letter
, th e Divisio n note d tha t base d o n existin g dat a th e qualit y o f th e wate r leavin g Leadvill e Corporatio n propert y is "fairl y clos e t o meetin g standard s fo r Bi g Evan s Gulch. " Se e Exhibit E

. Thi s statemen t i s supporte d b y th e result s o f wate r sample s authorize d b y Leadvill e Corporatio n

o f Bi g Evan s Gulch

. Durin g 1987 , si x sample s wer e take n fro m th e receivin g waters upstrea m o f 

### th e propose d discharg e poin t an d fro m wate r drainin g th e existin g working s at th e Min e an d on e sampl e wa s take n fro m th e Elkhor n Shaf t discharge
, copie s o f th e individua l la b analyse s o f th e sample s ar e attache d a s Exhibi t F

. I n addition
, a tabl e o f th e 

### si x Bi g Evan s Gulc h wate r sampl e result s i s attache d as Exhibi t G

. A s on e ca n se e fro m th e sampl e results
, even t withou t treatment , 

### th e Min e drainag e wate r qualit y meet s most strea m segment standard s and i s comparabl e t o ambien t wate r qualit y i n Bi g Evan s Gulch

.

-6

-Based

o n th e Novembe r 7 , 198 6 lette r fro m th e Divisio n an d subsequen t telephon e conversation s

wit h Divisio n representatives , th e bes t solutio n wit h respec t t o th e NPDE S Permi t i s t o plug th e Y ak Tunnel
, pum p th e wate r t o th e surface
, trea t th e wate r an d discharg e it int o Bi g Evan s Gulch

. Leadvill e Corporatio n

i s willin g t o implemen t th e plug an d pum p solutio n t o th e NPDE S Permi t matte r a s lon g a s i t i s acceptabl e t o the EP A and DO J wit h respec t t o it s fina l remedia l actio n fo r th e Ya k Tunne l operabl e unit

. III

. SUMMAR Y O F TH E R I AN D F S 

### A s note d i n th e Phas e I
, Remedia l Investigatio n

Report

, Californi a Gulch

, Leadville

, Colorado

, Ma y 198 7 (th e "RI")

, th e 

### Y ak Tunne l contribute s 80 % o f th e dissolve d zinc , 85 % o f th e dissolve d cadmiu m and 76 % o f the manganes e tha t leaves the Californi a Gulc h sit e an d enter s th e Arkansa s River

. I n fact
, th e wate r discharge d fro m th e Ya k Tunne l Porta l contain s concentration s

o f Cd

, Zn
, P b an d M n that ar e i n exces s o f EP A Drinkin g Wate r Standards

. T o remed y th e proble m a t th e Yak Tunne l operabl e unit , th e EP A i n it s F S reviewe d te n alternative s

an d th e no actio n alternative

. Tw o viabl e alternative s

remaine d afte r th e initia l screenin g process : (1 ) Alternativ e 5—collectio n

an d treatmen t o f t h e Yak Tunne l aci d drainag e wit h discharg e o f th e treate d effluent ; an d (2 ) Alternativ e 7—installatio n

o f a concret e plug(s ) i n th e Yak Tunne l (partia l plugging ) t o reduc e th e porta l 

### flow
, wit h subsequen t collectio n an d treatmen t o f th e remainin g -7

-aci

d drainag e prio r t o discharge

. EP A determine d tha t Alternativ e 7 woul d cos t les s tha n Alternativ e

5 becaus e th e partia l pluggin g woul d reduce th e volume an d metal load s o f porta l flo w and
, consequently
, requir e a smalle r treatmen t plant

. Sectio n 121(d ) o f SAR A require s that th e selecte d remedia l actio n attai n a degre e o f clea n u p which
, a t a minimum , assures protectio n o f huma n healt h i n the environment

.

A s note d i n the F S

, protectio n o f human healt h ca n b e accomplishe d

b y obtainin g o r exceedin g criteri a establishe d unde r th e Saf e Drinkin g Wate r Act : Maximu m containmen t level s an d propose d maximu m containmen t leve l goals

. Furthermore
,

protectio n o f th e aquatic environmen t

ca n be 

### accomplishe d b y obtainin g o r exceedin g ambien t wate r qualit y criteri a fro m th e Clea n Wate r Act

. Thes e criteri a ar e show n o n Tabl e 2 o f th e FS

, a t pag e ix

. Presumably
,

Alternative s

5 an d 7 woul d mee t thes e standards

. I V

. LEADVILL E

CORPORATIO N

I S A T MOS T A D E MINIMI S CONTRIBUTO R WIT H RESPEC T T O TH E YA K TUNNE L OPERABL E UNI T AN D T H E STRA Y HORS E GULCH/STAR R

DITCH OPERABL E UNI T A

. Ya k Tunne l Operabl e Unit

. Accordin g t o th e Wate r Qualit y Modelin g Study

, Ya k Drainag e Tunnel
, date d December 1 , 1986 , prepare d b y Hydro-Search

, Inc

. (th e "HS I Study")

, a copy o f whic h ha s bee n previousl y submitte d b y Leadvill e Corporatio n

t o EP A and i s include d i n the bibliograph y t o th e R.I.

, th e flo w fro m th e propert y owned b y Leadvill e Corporatio n

int o th e Yak Tunne l represent s onl y 20-25 %



### o f th e tota l Ya k Tunne l discharg e a t th e portal

. HS I pag e 1

. Accordin g t o th e HS I Study

, th e wate r qualit y o f th e unplugged
, -8

-untreate d

discharg e fro m th e Yak Tunne l i s se t fort h i n Table 2 below. * HS I pag e 6

. TABL E

2 mq/

1 Cadmiu m 0.4 6 Coppe r 2.2 8 Lea d 0.1 4 Manganes e 26.2 0 Mercur y - Zin c 94.2 5 A s note d in Tabl e 1 , th e averag e wate r qualit y o f th e Ya k Tunne l wate r leavin g th e propert y owne d b y Leadvill e Corporatio n meet s th e applicabl e drinkin g wate r standard s fo r Cd

, Cu

, Pb
, H g

an d Zn

. Onl y th e concentratio n

fo r M n exceed s th e EP A recommende d goa l fo r drinkin g wate r quality

. Se e 4 0 C.F.R

. § 143. 3 (1986)

- Secondar y Maximu m Contaminan t Levels

. T h e Cod e o f Federa l Regulation s

specificall y provide s tha t

eac h stat e ma y establis h highe r o r lowe r level s fo r M n tha t ma y be appropriat e i n ligh t o f loca l condition s o r othe r factors

. Id

. T h e Stat e doe s no t appea r t o hav e a drinkin g wate r standar d fo r M n

. Se e 5 C.C.R

. § 1003-1, Articl e 5.1.1(1)

. Furthermore
,

th e Jun e 198 5 editio n o f EP A documen t 540/G-85/003

,

Guidanc e o n Feasibilit y Studie s unde r CERCLA

, doe s no t includ e a n ambien t standar d fo r Mn

. Se e Tabl e 5- 2 EP A Ambien t Standard s an d Criteri a f o r Superfun d Remedia l Sites

. Leadvill e Corporation

,

however
,

* Th e HS I Stud y adopt s th e Engineering-Scienc e

wate r qualit y dat a 

### f o r th e Ya k Tunne l Portal

. Th e Engineering-Scienc e

sample s wer e take n durin g the sam e genera l tim e perio d i n 198 6 a s the seven Leadvill e Corporatio n

sample s referre d t o above

. -9

-does

no t anticipat e an y problem s i n meetin g th e applicabl e NPDE S effluen t limitatio n fo r tota l an d dissolve d manganese
. Wit h respec t t o aquatic life
, it doe s no t appea r tha t th e concentration s

o f M n in th e wate r contribute d t o th e Ya k Tunne l flo w b y th e Min e represent s a dange r t o aquati c life

. Accordin g t o th e U.S

. Departmen t o f th e Interior
, Burea u o f Reclamatio n documen t REC-ERC-81-15

,

Heav y Metal s Pollutio n o f th e Uppe r Arkansa s River

. Colorado

, an d It s Effect s o n th e Distributio n

o f Aquati c Macrofauna

.

Septembe r 198 1 ("Heav y Metal s Study")

, M n i s usuall y presen t i n surfac e wate r i n concentration s

i n excess o f 1. 0 mg/ 1 and M n i n tha t concentratio n

i s not toxi c t o trout

. Heav y Metal s Stud y pag e 12

. Th e publicatio n recommend s tha t M n shoul d no t b e presen t i n col d surfac e water s i n exces s o f 1. 0 mg/ 1 t o protec t aquatic life

. Id

. Th e M n level s i n th e wate r leavin g Leadvill e Corporatio n

propert y tha t woul d b e plugge d an d pumpe d t o t h e surfac e b y Leadvill e Corporatio n

averag e les s tha n one-fifth

o f th e recommende d

level

. Th e publicatio n als o suggest s tha t M n actuall y ca n b e antagonisti c

t o th e toxi c effect s o f othe r heav y metals

. Id

. Finally
, base d o n th e Leadvill e Corporatio n

sampl e dat a an d t h e HS I Study

, i t appear s tha t th e M n contribute d b y th e wate r exitin g th e Leadvill e Corporatio n

propert y vi a th e Ya k Tunne l represent s onl y 0.7 % o f th e M n concentratio n

a t th e Yak Tunne l Portal

. I n fact
, th e HS I Stud y conclude d tha t th e los s o f th e clea n wate r drainin g fro m th e Min e int o th e Yak Tunne l woul d

-10

-resul

t in furthe r increasin g th e meta l concentration s

a t th e Ya k Tunne l Portal

. HS I pag e 2

. I n additio n t o th e current wate r qualit y sample s an d recen t studies
, histori c dat a i n th e record s o f Leadvill e Corporatio n concernin g th e Min e demonstrat e tha t mine wate r was pumpe d t o th e surfac e an d use d fo r domesti c purpose s an d afte r use , th e wate r

wa s discharge d t o Bi g Evan s Gulch

. Specifically

,

th e wate r wa s
used fo r compresso r coolant
, chang e roo m shower s an d drinkin g wate r purposes

. Th e histori c dat a doe s no t indicat e an y advers e effect s t o ma n o r machines a s a resul t o f usin g th e wate r pumpe d fro m th e Min e t o th e surface

. Give n al l th e facts
, Leadvill e Corporatio n

clearl y satisfie s t h e requirement

s o f Sectio n 122(g)(l)(A

) becaus e th e amoun t o f hazardou s substance s an d th e toxi c o r othe r hazardou s effect s o f t h e substance s flowin g int o th e Ya k Tunne l syste m fro m th e Min e is

a t th e most d e minimi s i n compariso n t o othe r hazardou s substance s i n th e discharg e a t th e Yak Tunne l Portal

. I n fact
, ther e ha s been an d i s n o releas e an d ther e ha s bee n an d i s n o threatene d releas e o f an y hazardou s substance
, pollutan t o r contaminan t

fro m th e propert y owne d b y Leadvill e Corporation

.

Consequently

, Leadvill e Corporatio n

i s clearl y eligibl e t o ente r int o a settlemen t agreemen t wit h th e EP A an d DO J pursuan t t o Sectio n 122(g ) o f SARA

. B

. Stra y Hors e Gulch/Star r Ditc h Operabl e Unit

. I n a letter
, date d Jun e 3 , 1987 , th e EP A asserte d tha t Leadvill e Corporatio n

i s a n owne r and/o r operato r o f th e wast e -11

-dump s

an d tailing s pile s i n Stra y Hors e Gulc h tha t contribut e t o th e releas e o f hazardou s substance s int o th e environment

.

I n tha t letter
, EP A state d tha t "EP A ha s reason t o believ e . . . [Leadville Corporation]

i s a curren t and/o r pas t owne r o r operato r

o f a facilit y fro m whic h this releas e o r threatene d releas e i s occurrin g o r ma y occu r withi n th e meanin g o f Sectio n 10 7 o f CERCLA

, 4 2 U.S.C

. § 9607. " Thi s referenc e t o th e facilit y wa s a direc t referenc e t o Stra y Hors e Gulc h an d Star r Ditch

. I n respons e t o tha t letter
, Leadvill e Corporatio n

sen t EP A a letter
, date d Jun e 15 , 1987 , i n whic h i t denie d tha t i t wa s eve r th e owne r o r operato r o f an y facilit y i n o r nea r eithe r Stra y Hors e Gulc h o r Star r Ditc h areas
. Thi s statemen t wa s mad e base d

o n conversation s

wit h Leadvill e Corporatio n

officer s an d employees

. Thes e officer s an d employee s did no t kno w an d did no t believ e tha t Leadvill e Corporatio n

ha d eve r ha d an y involvemen t i n t h e Stra y Hors e Gulc h o r Star r Ditc h areas
. I n connectio n wit h th e curren t litigation
, a revie w o f historica l document s maintaine d b y Leadvill e Corporatio n

wa s undertaken

. A s a resul t o f the review , i t ha s com e t o our attentio n tha t durin g 197 1 Leadvill e Corporatio n

ha d a n agreemen t wit h Morri e Biggs

, lesse e o f th e Robert Emmet t Mine
, whic h wa s

owne d b y ASARCO

, t o conduc t a n undergroun d exploratio n

program

. A t th e en d o f th e exploratio n program , th e operatio n was abandone d

an d th e sit e reclaime d pursuan t t o th e the n existin g requirements

. Leadvill e Corporation

,

however
, does no t hav e a cop y o f th e agreement

. Th e informatio n concernin g this exploratio n progra m
-12

-w a s

obtaine d fro m th e company' s annual repor t an d a mem o fro m D.W

. Bloo m o f Eart h Sciences

, Inc

. t o Dr

. R.G

. Risk

, Presiden t o f Leadvill e Corporation

. I t shoul d b e note d tha t durin g thi s exploratio n period
, ther e

wa s n o releas e o r threatene d releas e o f an y hazardou s substance
, pollutan t o r contaminan t cause d b y Leadvill e Corporation

. Consequently

, Leadvill e Corporatio n

agai n satisfie s th e requirement s o f Sectio n 122(g)(l)(A

) becaus e it s involvemen t

i n th e Stra y Hors e Gulch/Star r Ditc h are a i s a t mos t d e minimis

. Leadvill e Corporatio n

therefor e i s eligibl e t o ente r int o a settlemen t agreemen t wit h th e EP A an d DO J concernin g th e Stra y Hors e Gulch/Star r Ditc h area . Therefore
, Leadvill e Corporatio n

i s willin g t o implemen t it s propose d plu g an d pum p remedia l actio n o n th e conditio n tha t EP A an d DO J ente r int o a settlemen t agreemen t wit h Leadvill e Corporation

.

Th e requirement s o f th e settlemen t agreemen t ar e discusse d i n Sectio n VI

. V

. TH E PROPOSED REMEDIA L ACTIO N A

. Ne w Yea r Sea l o f th e Ya k Tunnel

. A s note d above
, Leadvill e Corporation' s

proposa l incorporate s concept s tha t ar e comparabl e wit h Alternative s

5 an d 7

. Specifically

, Alternativ e

7 , whic h i s th e partia l plugging proposal
, call s fo r placing th e Ibe x plu g i n th e vicinit y o f th e Westo n Faul t Zon e t o reduc e th e volum e o f wate r exitin g th e Ya k Tunne l Portal

. Th e Leadvill e Corporatio n

proposa l call s fo r placing a hig h pressur e concret e sea l o r plug in th e Ya k Tunne l o n t h e Ne w Yea r Lod e Minin g Clai m M S 496 , whic h i s propert y owne d b y
-13

-Leadvill

e Corporation

.

Althoug h th e Leadvill e Corporatio n proposa l involve s placin g th e seal close r t o th e head o f th e Yak Tunne l tha n Alternat e 7 , i t appear s tha t th e differen t locatio n wil l no t greatl y impac t th e volum e o f wate r exitin g th e Ya k Tunne l Portal

. Th e plu g wil l prohibi t wate r currentl y drainin g fro m Leadvill e Corporation' s

Diamond-Resurrectio n

propert y fro m reachin g th e Ya k Tunne l Portal

. I n addition
, a second plu g coul d be place d a t th e Ibe x locatio n i f th e volum e o f wate r a t th e porta l i s no t reduce d t o th e desire d leve l b y th e firs t plug

. I n

a ny event , Leadvill e Corporation' s

proposa l achieves on e o f th e remedia l goal s establishe d b y th e EP A i n th e FS : Reducin g th e volum e o f wate r tha t i s discharge d a t th e Ya k Tunne l Portal

. T h e seal wil l b e locate d approximatel

y 370 0 fee t fro m th e terminu s o f th e Ya k Tunne l an d wil l b e place d in pre-cambria n granite

. (Exhibi t H contain s a ma p showin g th e specifi c locatio n

o f th e propose d seal. ) Th e specifi c locatio n wil l b e determine d followin g detaile d geologi c mappin g t o ensure a locatio n tha t wil l achiev e th e desire d purpos e o f containin g th e Mine' s wate r flo w and
, shoul d th e EP A agre e t o institut e ASARCO' s

Ya k Tunne l pluggin g proposal
, t o protec t th e Mine' s natura l resourc e area fro m inflow s o f potentiall y acid-min e drainage

. Th e detaile d geologi c mappin g als o wil l includ e determinin

g th e locatio n o f th e
sea l relativ e t o bot h loca l an d majo r structura l systems

. T h e seal' s desig n i s i n accordanc e wit h current U.S

. Burea u

o f Reclamatio n

desig n data

. (Exhibi t I contain s drawing s tha t sho w specifi c desig n feature s fo r th e seal. ) Th e seal wil l b e a
-14

-cast

i n plac e concret e plu g havin g a weigh t capabl e o f withstandin g a pressur e o f 170 0 fee t o f wate r head maximum

. (Exhibi t I contain s a summar y o f th e genera l concret e characteristic s

an d requirements.

) Th e locatio n o f th e sea l wil l be pressur e groute d t o withstan d a comparabl e pressur e fo r a minimu m o f 2 0 fee t int o th e surroundin g granite

. (Exhibi t I summarize s th e grou t detail. ) T h e anticipate d desig n an d constructio n

perio d i s twelv e weeks

. Th e followin g i s a summar y o f th e individua l constructio n phases : Engineerin

g - Thi s phas e involve s undertakin g specifi c locatio n analysi s an d detai l desig n o f th e seal
, grou t curtai n an d constructio n

specifics

. Thi s phas e include s a two wee k perio d t o obtai n governmenta l

approva l o f th e seal locatio n an d design

. Thi s phas e i s anticipate d t o tak e si x week s t o complete

. Purchasin g - Th e purchasin g phas e wil l consis t o f obtainin g require d materials
, assurin g deliverabilit

y o f material s an d th e letting o f constructio n

contracts , i f required

. Thi s phas e i s anticipate d t o tak e thre e week s t o complete

. Mobilizatio n - Th e mobilizatio n phas e involve s mobilizing th e require d personne l an d equipmen t t o allo w f o r th e placemen t o f th e plug

. Thi s phas e shoul d b e complete d withi n fiv e workin g days

. Leve l Rehabilitatio n

- Leve l rehabilitatio n

wil l consis t o f wor k require d t o ensure access alon g th e cours e o f t h e Ya k Tunne l fro m th e propose d Ella B Shaf t t o th e seal locatio n an d wil l includ e communications ,

roc k fal l removal
, groun d control
, a s required
, an d th e installatio n o f necessar y constructio n

services

. I t i s anticipate d tha t this wor k wil l b e complete d withi n fiv e workin g day s o f thre e shifts each

. Dril l Hol e - T o ensure timel y placemen t o f concrete , i t i s propose d tha t a si x t o eigh t inc h dril l hol e b e place d fro m th e surfac e t o a locatio n immediatel y abov e th e seal

. Thi s hol e wil l allo w fo r concret e t o b e -15

-pumpe d down t o th e Yak Tunne l fo r placemen t int o th e seal

. A second hol e ma y b e drille d fo r constructio n services i n lie u o f placemen t fro m th e acces s shaf t t o th e sea l location

. Approximatel

y tw o week s o f multiple

shif t wor k wil l b e require d fo r this constructio n

phase

. 6

. Rin g Dril l - Thi s phas e involve s th e drillin g o f grou t curtai n hole s int o th e surroundin g roc k a t th e seal locatio n t o allo w placemen t o f th e require d grout curtain

. Th e rin g dril l phas e i s anticipate d t o tak e approximatel y fou r day s o f multiple-shif

t work

. 7

. Bulkhea d - Timbe r bulkhead s wil l b e constructe d a t th e seal locatio n t o contai n th e cemen t t o for m th e physica l seal

. I t is anticipate d tha t thre e day s o f multipl e shif t wor k wil l b e required

. 8

. Placemen t o f Cemen t - Thi s phas e i s th e pumpin g o f
cemen t t o th e propose d seal location

. Fiv e workin g day s o f multiple-shif

t wor k i s anticipate d t o complet e th e physica l seal itself

. 9

. Grou t - Followin g a n anticipate d 2 8 da y curin g period
, high pressur e grou t wil l b e place d via th e previousl y drille d hole s t o for m a curtain around th e seal

. Fiv e workin g day s o f multiple-shif

t wor k is anticipate d fo r this phase

. 10

. Demobilizatio n

- Demobilizatio n

wil l consis t o f removal
o f equipment , salvageabl

e materia l an d service s t o th e surface

. Reclamatio n

o f surfac e disturbance s

cause d b y bore hol e constructio n

an d cemen t pours

. Thi s phas e shoul d b e accomplishe d

withi n fiv e workin g days

. B

. Wate r Treatment

. A s th e minin g facilitie s an d associate d working s ar e no t ye t developed
, it i s no t possibl e t o determin e th e precis e flo w o f wate r through th e area ; however
, a conceptua l lin e drawin g i s attache d a s Exhibi t J

. Fo r this reason , Leadvill e Corporation' s propose d treatmen t syste m i s designe d wit h generou s reserve capacity

. I t i s currentl y anticipate d tha t th e mine shaft s an d working s wil l b e th e primar y source s o f water

. Th e wate r likel y wil l b e gathere d via flume s locate d in th e drifts an d shafts

. -16

-Thi s

flo w wil l b e collecte d i n sumps , pre-treate d

an d pumpe d t o t h e surfac e fo r fina l treatmen t befor e discharg e int o Bi g Evan s Gulch

. Becaus e contro l o f tota l suspende d solid s i s th e ke y t o meetin g th e projecte d permit limitation s fo r th e effluen t fro m th e Mine
, th e wate r treatmen t wil l consis t o f settling pond s wit h th e possibl e us e o f flocculation

.

Pleas e refe r t o Exhibi t E fo r th e propose d wate r qualit y afte r treatmen t base d o n a n actua l physica l sampl e wit h lo w TSS

. Afte r treatment , th e wate r collecte d withi n th e min e working s wil l no t degrad e th e existin g wate r qualit y o f Bi g Evan s Gulc h o r impai r an y existin g us e o f th e water

. 1

. Treatmen t

Technologies

. Wate r collecte d i n th e tunnel a s a resul t o f th e pluggin g wil l b e pumpe d t o th e surfac e fo r treatmen t an d discharg e int o Bi g Evan s Gulch

. Prio r t o bein g pumpe d t o th e surface
, th e collectio n sump s locate d in th e min e working s wil l pre-trea t th e flo w b y allowin g th e bul k o f suspende d solid s t o settle-out

. Treatmen t als o ma y includ e th e possibl e additio n o f lim e i n th e undergroun d sump s t o precipitat e an y suspende d solid s in solution

. T h e treate d wate r wil l the n b e pumpe d t o th e surfac e via th e Ell a B Shaf t t o th e treatmen t facilit y locate d o n th e surface

. Retentio n tim e in th e surfac e settling pon d wil l b e a minimu m o f fou r hour s an d maximu m o f sixtee n hour s wit h th e anticipate d flow s

an d i s sufficien t t o achiev e discharg e parameter s usin g th e propose d system

. Ultimate disposa l o f any soli d wast e generate d wil l occur a t th e Stringtow n Mill
, a meta l concentratio n

plant

. T h e metal s in th e soli d wast e wil l b e extracte d an d th e residu e -17

-wil

l the n b e place d in a zero discharge
, permitte d tailing s pond

. T h e surfac e settlin g pon d an d associate d equipmen t wil l b e enclose d withi n a n all-weathe r structur e t o maintai n treatmen t efficienc y despit e th e hars h climati c condition s foun d a t th e site

. Th e desig n o f surfac e facilitie s ar e containe d in Exhibi t K

. Th e treatmen t syste m woul d operat e year roun d as lon g as th e Min e i s i n production

. Onc e operation s a t th e Min e are terminated
, mine wate r woul d b e dispose d o f i n accordanc e wit h th e Mining an d Reclamatio n Permit issue d b y th e Mine d Lan d Reclamatio n Division

, whic h i s t o sto p pumpin g th e wate r t o th e surfac e an d le t th e Min e flood

. Base d o n th e dat a reviewe d t o dat e (se e Exhibi t L ) an d fiel d observation s

mad e b y Leadvill e Corporatio n

o f th e Paleozoi c rock s i n th e Mine
, i t i s probabl e tha t wate r woul d

no t bac k u p behin d th e plug t o a significan t depth

. Instead
, i t woul d mos t likel y migrat e t o th e northeas t alon g integrate d kars t

cav e systems , fault s an d fracture s becomin g par t o f th e natura l groun d wate r syste m northeas t o f th e Site

. 2

. Intermitten t

o r Seasona l Discharges

. Historically
, undergroun d

mine s in th e Leadvill e Minin g Distric t hav e encountere d occasiona l inflow s o f wate r tha t ar e significan t initially
, bu t rapidl y decreas e in volume

. Du e t o thi s possibility
,

common minin g practic e i s t o hav e dril l hole s locate d i n advanc e o f workin g face s t o drain thes e area s t o preven t hig h inflow s fro m occurring

.

-18

-Leadvill

e Corporatio n

believe s tha t i t ca n preven t an d contro l th e potentia l surge s through th e us e o f th e prove n methodolog y describe d above

. Also
, th e undergroun d sumps wil l hav e sufficien t capacit y t o ac t a s a buffe r shoul d increase d flo w rates fro m th e working s occur . B y controllin g flo w variations , surg e effect s wil l b e minimize d an d shoul d no t excee d th e expecte d maximu m o f 45 0 gallon s pe r minut e b y mor e tha n te n percent

. I n this way , th e volum e o f wate r pumpe d t o th e surfac e treatmen t facility wil l alway s b e withi n desig n limits

. 3

. Proces s Operation s Plan

. Min e wate r wil l b e pre-treate d

befor e bein g pumpe d fro m undergroun d collectio n sumps t o th e surfac e treatmen t facility

. Sum p influen t p H wil l be monitore d an d adjuste d t o a p H o f 9 t o 10. 5 b y th e additio n o f lime

. Th e lim e fee d syste m wil l be comprise d o f storag e hopper
, mixin g tank
, pum p an d a contro l device

. Th e majorit y o f settlin g an d flocculatio n

i s expecte d t o

occu r undergroun d thereb y reducin g pum p wea r an d the amoun t o f sludg e requirin g off-sit e disposal

. O n th e surface
, additiona l p H monitorin g wil l assur e tha t optimu m p H level s fo r treatmen t ar e maintaine d withou t exceedin g th e permit limitation

. Proces s equipmen t wil l b e checke d periodicall

y fo r prope r functio n an d a preventiv e maintenanc e

progra m employed

. Sludg e wil l b e remove d

an d transporte d b y a vac-truc k o n a n as-neede d basi s t o th e Leadvill e Corporatio n

Stringtow n Mil l fo r processin g an d fina l disposal

. Periodi c testin g o f th e effluen t wil l b e conducte d t o

-19

-ensur e

tha t wate r qualit y standard s ar e met

. Th e tes t result s wil l guid e an y necessar y adjustment s t o th e process

. T h e constructio n

o f a sedimentatio n

basin an d th e treatmen t

o f th e wate r wit h chemica l flocculants
,

i f necessary , als o incorporate s remedia l option s se t fort h i n Alternative s

5 an d 7

. Specifically

, Alternative s

5 an d 7 cal l fo r th e collection
, treatmen t an d discharg e o f Ya k Tunne l water

. Th e proposa l call s f o r collection
, treatmen t an d discharg e o f groun d wate r tha t woul d otherwis e flo w int o an d through th e Yak Tunnel

. A s a result
, anothe r remedia l goa l o f th e EP A i s achieved

. V I

. CONDITION

S O F IMPLEMENTIN

G TH E PROPOSA L A s note d above
, Leadvill e Corporatio n

wil l implemen t th e proposa l as lon g as tw o condition s ar e satisfied

. T h e firs t conditio n i s tha t th e EPA

, DO J an d th e Stat e approv e th e proposal

. Leadvill e Corporatio n

is makin g this requiremen t becaus e i f a n NPDE S permi t i s require d fo r th e Min e th e Divisio n has indicate d tha t th e best solutio n appear s t o be t h e pluggin g th e Ya k Tunnel
, pumpin g th e wate r t o th e surface
, treatin g th e wate r an d dischargin g i t int o Bi g Evan s Gulch

. Th e Division' s solution
, however
, i s no t on e o f th e Alternative s specificall y se t fort h i n th e FS

. Consequently

,

thi s conditio n is
necessar y becaus e Leadvill e Corporatio n

does no t wan t t o implemen t th e Bi g Evan s Gulc h plug an d pum p solutio n if
, i n si x months
, th e E P A i n selectin g it s fina l remedia l actio n requires Leadvill e Corporatio n t o "unplug " th e Ya k Tunnel

. I t wil l b e extremel y costl y t o plu g th e Ya k Tunnel
, purchas e pump s an d material s an d

-20

-construc t

th e proposal

. I t woul d b e foolis h fo r Leadvill e Corporatio n t o implemen t th e alternativ e t o satisf y th e NPDE S permi t requiremen t

onl y t o hav e th e EP A an d DO J requir e Leadvill e Corporatio n t o remov e th e plu g i n orde r t o implemen t a remedia l action

. Th e estimate d cos t o f th e plug an d pum p alternativ e i s $300,000.0 0 wit h a n estimate d $75,000.0 0

pe r year operatin g cost

. T h e secon d conditio n Leadvill e requires i s tha t th e EP A an d D O J ente r int o a settlemen t agreement pursuan t t o Sectio n 12 2 o f SARA

. Th e settlemen t agreemen t mus t contai n a covenant no t t o su e pursuan t t o Sectio n 122(g)(2 ) o f SARA

, whic h cover s any liabilit y t o th e Unite d State s unde r CERCL A an d SARA

, includin g futur e liability
, resultin g fro m a releas e o r threatene d releas e o f a hazardou s substanc e addresse d b y remedia l action , whethe r th e actio n i s on-sit e o r off-site

. Th e settlemen t agreemen t als o mus t contai n a contributio n

protectio n provisio n pursuan t t o Sectio n 122(g)(5 ) o f SARA

. Leadvill e Corporatio n

believe s tha t th e settlemen t agreemen t i s in th e publi c interes t an d woul d expedit e

a respons e actio n consisten t wit h th e Nationa l Contingenc y

Pla n unde r Sectio n 105

. Furthermore
,

suc h a n agreemen t woul d promot e EPA' s goa l o f settlin g wit h d e minimis partie s i n orde r t o mak e negotiation s an d litigatio n mor e manageable

. Finally
, a settlemen t agreemen t woul d allo w Leadvill e Corporatio n

t o expen d it s financia l resource s in remediatin g a portio n o f th e perceive d environmenta l proble m a t th e Yak Tunne l Porta l operabl e uni t instea d o f payin g lega l fee s an d transactio n cost s o f litigatin g wit h th e government

. -21

-VII

. CONCLUSIO N Leadvill e Corporatio n

i s presentin g thi s proposa l i n orde r t o implemen t th e goa l o f CERCLA

, whic h i s t o expedit e respons e action s b y potentiall y responsibl

e parties

. Leadvill e Corporatio n woul d be happ y t o mee t wit h th e EPA

, DO J an d th e State a t an y tim e t o revie w th e proposa l an d t o discus s an y question s th e EPA

, DO J

o r Stat e ma y hav e wit h respec t t o th e proposal

. Thi s proposa l i s bein g submitte d i n a n effor t t o stimulat e settlemen t discussion s wit h respec t t o potentia l liabilit y o f Leadvill e Corporatio n

fo r Uppe r Californi a Gulc h an d Stra y Hors e Gulch/Star r Ditch

. I t i s

no t an d shoul d no t b e deeme d a s a n admissio n o f liabilit y fo r an y aspec t o f th e Sit e a s describe d i n al l applicabl e pleadings

.

-22

-EXHIBI T A

# Poo r Qualit y Sourc e Documen t T h e followin g documen t images hav e bee n scanne d fro m the bes t availabl e source copy

. T o vie w the actual hard copy , contact the Superfun d Record s Cente r at 303-312-647 3

# / \

,..... . «*";Fil*d..for * recor d Augus t 23, 197 3 .2:3 0 P.M

. • v Re c .No^S.6436

- Terrenc e S

. Connor s Recorde r i :> k 40 0 10

2 

# ANni;~,ncT S

• • » : V
.,..,.. • 

### • : 31SV : MININ G DEED*-**

- ••*JA4 I

.»•'« • THI S MININ G DEED

, mad e thi s 26t h clay o f Jul y

; '^- ; 1973,-: * etween ROBER T L

. JONES

, o f 463 0 Vanc e Street

, Lakewood

, ''•: : 'Colorado

, 80215 , th e Grantor

, an d LEADVILLr

,

CORPORATION

, a Colorad o corporation ,

o f P.O

. Bo x 960 , Leadville

, Colorado

, 

### -•^'80461 , th e Grantee

. 

### S

E T H :;.- ; consideratio n o f $35,00 0 an d othe r •"•r^-

. valuabl e considerations

t o hi m i n han d paid b y Grantee

, th e • ' '•"" receip t o f whic h i s hereb y acknowledged

, doe s hereb y sel l an d



### o f Colorado

, t o wit : r.t£^describe d on.Exhibit ^ attached
, ; .V,;

. 

### -•-**'———.—'~~—~»-~- i Sy

. reference^-.subjec t

•;•»••-•«•.".;.»'.

. ifbf' royalty'i

- ind/'-^v^^^^':'^ ns^reservati6r i

### ' ' attache d

to ;

and "tnterest s exclude d :-by " America n Cpmp.iny

. an d Resurrectio n

Minin g Compan y a s ^"Vn^"

. f 

### ventur e ire'fenown

- a s Res-Asarcd._Join t

Venture;.; ^ : 'drainag e an d transportatio n

tunne l' / : "" " " ••^•'•'•'-

.

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### .Tories,;.th e Granto r unde r thi s instru- ; i;ifig'^" : 

### Seiltn g an d co'nveying j nevertheles s

..' ; 

## ^^^••:•"- , ; *•%%?.'•:-i^'tf&^'-^'fy-.

. ;

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## ^ :



## . • :hii5 r instrumen t al l rights
, .titl e ari d ; , , ,..^

> ....... tW-AV........ . ..jrfeVty

- Jone s unde r the; term s o f Jthe^^;;^^
, ^jf§r.rc^t^. : V a'p'iiy'ie^V^^;.:-^'>;';.; ^

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. lixcepuin g al l tight
, ttl.l c an d interes t exceptc d

an d reserve d i n favo r o f America n Smeltin g an d Refinin g Compan y

an d Resurrectio n

Minin g Company as member s o f a join t ventur e 

### know n as Res-Asarc o Join t Venture
, an d i n favo r o f al l th e land s owne d b y them
, i n th e for m o f a righ t o f wa y excepte d and

reserve d unde r th e terra s o f th e Minin g Dee d referre d t o above
, fro m Res-Asarc o Join t Ventur e t o Robert L

. Jone s a s Grantee ; an d 3

. Subjec t t o th e covenant s runnin g v;it h th e land

se t fort h i n th e Minin g Deed betwee n Res-Asarc o Join t Ventur e



### an d Rober t L

. Jones
, a s Grantee

, referre d t o above

.

:


### , . . TO HAV E AN D TO HOL D th e ^ara e unt o th e Grantee

, it s '..;,.-
successors , lega l reprer.cnLaLive n

, an d assigns , forever

. .-••• " Granto r doe s no t warran t th e titl u c o th e propertie s conveye d hereb y an d thi s instrumen t shal l b e considere d as : a Bargai n au d ; Sal e Deed i n accordanc e wit h §118-1-15
, Colorad o Revised Statuccs

, .. .

- I N WITNESS

^ WHEREOF, : th e partie s heretoJiay e execute, ! thi s Dee d effectiv e th e dat e firs t abov e

STAT E O F COLORADO.

.

" - •»

- • ; '•', "' . •

. CIT Y AN D COUNT Y O F DENVE R T h e foregoin g instrument 

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### Witnes s m y han d and officia l

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RESERVIN

G unt o Granto r th e following : 1

. Royalty

. Granto r reserve s an d Grante e agree s t o pa y t o Granto r a productio n ro , ..'.•„ y .. - ;o l t o 47 , o f th u ne t smelte r an d min t return s o r tu c nc L rail ! return s fro m al l or e 

### produce d fro m th e rea l propert y Oc.scribe d o n Exhibit A (th e "Jone s Claims")

. T h e "ne t smelte r returns " upo n which royaltie s shal l b e payabl e a s hereinabov e provided
, shal l mea n th e amoun t o f th e actua l payment s receive d fro m th e smelte r t o which or e o r concentrate s ar e delivered
, afte r deductin g ;il l smeltin g

: charges an d all
, cost s o f transporting suc h or e o r concentrate s t o sai d smelte r fro m th e Jone s Clai.-....»

. "Ne t sudte r returns " shal l includ e ne t min t returns , aiu l th e latte r i s define d a s abov e se t fort h wit h "mint " substitute d fo r "smelter. " I f t h e smelte r t o v.'.iic h ore s o r concentrate s fro m th e Jone s Claim s

ar e sen t fo r pri-'.-ossin g i s owne d b y th e Grantee

, smeltin g charge s shal l b e generall y consisten t wit h indu-

. u-j y charge s b y othe r smelter j processin g simila r or e o r concentrates ,

but th e royalt y interes t shal l no t bea r th e cost s normall y associate d wit h millin g fo r th e purpos e o f producin g concentrate s

fo r sal e t o a smelter

. The "ne t mil l returns " upo n whic h royaltie s shal l b e payabl e as hereinabov e provided
, shal^mea n th e amoun t o f th e actual payment s receive d fro m th e custo m mil l o r othe r buyer • ;.'; : tp-whic h sai d ores , concentrate s o r cementate s ar e delivered
,

- 1 - ' i f sai d ore s ar e sol d t o a mill
, afte r deducting all cost s o f

i 

### transportin g suc h or e t o sai d custo m mil l fro m th e demise d

• premises

.!<oo k 40 0 Pag e 1O 7
I n th e evi^n- : an y promi-i m i^ua l pny n r.t s o r govern men t subsidie s or e pai d o n na y or e r.iine d fro m th e demise d premises , the n unles s prohibite d o r limite d b y lo w o r govern men t regulation:-
, Grante e shal l pa y t o Granto r a s royalt y a percentag e o f suc h premiu m meta l paymen t o r governmen t subsid y equa l t o th e ro>\ili. y percentag e applie d upo n th e ne t mil l c ^ smelte r return'

- ouc a or e u s speci f Le d an d determivie d above

. I f any dispute

- shoul d aris e betwee n :.:. / partie s i n interes t ove r th e computatio n o f th e royalty
, it shal l b e referre d t o bindin g arbitratio n unde r th a rule s o f th e America n Arbitratio n Association

. Grantee ? shal l pay Granto r .; u annua l advanc e royalt y

o f $1,00 0 upo n executio n an d deliver
, o f thi s d-jed
, $2,00 0 o n • th e firs t anniversar y dat e o f this die d an d $3,00 0 o n eac h o f th e second throug h th e nint h anniversar y date c o f thi s deed

. Eac h suc h advanc e royalt y paymen t afte r th e firs t suc h paymen t

. shal l b e reduce d b y the tota l amoun t o f productio n royaltie s

: . paid durin g th e precedin g year . N o advanc e royalt y shal l b e payabl e afte r th e nint h anniversar y dat e o f thi s deed

. Gra.-:-" ^ ma y credi t suc h advanc e royalt y payment s agains t pro j ductio n royaltie s x*hic h become du e an d payabl e hereunder, " t o t h e r-ten t o f one-hal f o f eac h productio n royalt y payment. {

V K'.:.'. • Paymen t o f royaltie s shal l be mad e b y Grante e t o W ; ;X:^-;:i-;^

-

.' : "- '"•'yi'~£ci&z

~ Granto r withi n thirt y day s afte r th e en d o f Lh e calenda r mont h

: ^.- ; i n whic h Grante e receive s paymen t fo r th e ore . Failur e t o pa y /£•; ''( £

a ny suc h specifie d advanc e royalt y when du e shal l creat e a .-'•,; ;.'•'•**'•%£*. -.lie n fo r th e securit y o f th e unpaid amoun t encumberin g th e ; ;^ v v ; ! s'%'.;';

:-' : Jone s Claim s an d subordinat e onl y t o ;u-. y lie n 

### hel d

suc h b y o r throug h Lloy d L

. Morain

. Upo n payment^o f all' J : i;^,

: .X f

-

--^1

.

*'•*, : - «•" ,' • ^'-'l:•.^V- 1 ^-"•' • • •

. i v. . ..)•-'.-"'"i'-j-^ i

•'<';•-' -.j { advanc e royalt y payments , Granto r shal l execut e an d ^^^^s? : , 

# • - *

-2-Boo k 400 Paqo 100

delive r t o .Grante e a suitabl e releas e o r thi s lie n i u record

abl e form

. The mineral conten t o f al l or e raineu _. d ;.c,uove d fro m th e premise s shal l b e determine d b y Grante e o r b y th e purchase r o f the or e o r concentrate , i n accordanc e wit h stan

dard samplin g an d analysi s procedures

. Upo n reques t t o Grantee

,


### an d a t Grantor' s excise , Granto r shal l hav e th e righ t t o hav e



### a representativ e

presen t a t th e tim e supple s ar c taken

. A l l residu e o r tailing s remainin g afLui.

- th e initia l processin g o r millin g o f or e mine d f j.<..•.-

. th e Jone s Claim s shal l b e th e sol e an d exclusiv e propert y o f Grantee

. • I n the ever.. . Granto r own s a lesse r minera l interes t in th e Jone s Claims tha n th e entir e an d undivide d fe e simpl e estat e therein
, the n th e royaltie s herei n provide d fo r shal l r:-^. :' . te ; paid t o Granto r onl y i n th e proportio n tha t Grantor' s 

### \ : 

### '•".'=>,-

. - , minera l interes t bear s t o th e whol e an d undivide d minera l *•;

. Grante e ma y terminat e th e royalt y interes t herei n &^^r^ reserved

a t an y tim e on or befor e twent y year s afte r the deat h ^?^-.'i;> v o f th e las t survivo r o f th e presen t partie s o f th e la w fir m 4^'C-:,;; v:

- ; o f .Dayis- i Graham & StubL s o f Denver

, Colorad o b y payin g Granto r K\.-.-siVr'-V-'the su m o f $200,00 0 exclusiv e o f previou s royalt y payment s .':;'• • 

### !*£•.'&.'' i 

### .:.' l 

### .pai d t o Grantor.

- Upo n receip t o f suc h payment , Granto r shal l 

### Irf^V^quitclai m

t o Grantee.al l o f it s right
, titl e an d interes t in *the Jone s Claims

. righ t

t o leas e tailing;

. If
, a t40 0 Pag e 10 9
notif y Granto r o f suc h determinatio n

an d o f th u propose d leas e terras

. Granto r shal l hav e 2 0 day s afte r th e effective s dat e o f

suc h notic e withi n whic h t o notif y Grante e tha t it wishe s t o 

### leas e th e tailing s o n th e same terms

. I f Granto r s o notifie s Grantee

, the n Granto r an d Grante e shal l promptl y execut e th e lease

. I f Granto r doe s no t s o notif y Grantee

, the n fo r a perio d

o f si x month s followin g th e enectiv c dat e o f Grantee' s notic e t o Grantor

, Grante e ma y leas e th e tailing s o n die Jone s 

### t o an y thir d part y .fo r minin g purpose s o n th e term s c . i n th e notice , modifie d i n an y ica^ouabl e wa y tha t i s mor e favorabl e t o Grantee'

, fre o -,, : thi s preferentia l righ t t o lease

. 3

. Notice

. An y notic e require d or permitte d *- o b e give n hereunde r shal l b e deeme d properl y give n upo n persona l delivery o f a copy o f th e notic e t o th e part y to-who m it i s i directed
, o r b y depositin g a cop y o f th e notic e i n th e Unite d State s mail
, sen t b y registere d o r certifie d mail
, return . 

### receip t requested
, addresse d t o the part y t o who m the notic e i s directe d a s show n o n pag e on e o f thi s dee d o r as-determine d b y paragrap h thre e o f thi s Schedul e R

, o r t o suc h othe r perso n

o r addres s a s the part y t o b e notifie d ma y hav e designate d prio r theret o b y writte n notic e t o th e othe r party

.

: An y notic e
s o maile d shal l b e effectiv e upo n mailing

. "

. 4

. Al l covenant s o f Grante e containe d herei n are covenant s runnin g wit h th e Jone s Claim s an d shal l bin d Grantees' s
successors i n titl e thereto

. Grante e and an y successors i n titl e t o th e Jone s Claim s shal l onl y be bound t o perfor m th e covenant s t o th e exten t o f their interes t i n th e Jone s Claims.v > *

- v " * • 

# f>•'•"•••"•:

. TV-'*

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## ^'^ff"'''^^^mxl.$o r recor d Augus t 23 , 197 3 2:3 0 P.M

. Mo-256435
, Terrenc e S

.' £ b • Connor

s ^ F Recorde r Boo k 400 Paqe

9 7

MININ G DEE D THI S MININ G DEED

, riad e thi s st h da y o f Jun e 1973, betwee n America n Sneltin g an d Refinin g Compan y an d Resurrectio n Minin g Coir.;/..m y a s member s o f a join t ventur e i

. a s Res-Asarc o Join t Venture
, the Grantors

, and Rober t i s , o f 463 0 Vanc o .Street

, Lakewood

, Colorado

, th e Grantee

, ^

. .'• - W I T : J E' S S E T H : "

..'': . Th e GRANTORS

, i n •

- .u;ideratio n o f $35,000.0 0 t o the m i n han d paid .b y GRANTEE

, th o receip t o f whic h i s hereb y acknowl

edged
, d o hereb y sel l an d conve y unt o th e GRANTE E

th e follow

- in g describe d rea l estat e an d minin g propert y situate d in th e ; California.Minin

g District

, Count y o f Lake

, State o f Colorado

,

. to-wit : :-' •

. :



# Q

; • :' "•'•. > * Nam e o f Clai m Grou p 1; Diamon d Harriso n Max y D ,

; H

. Hawk Chestnu t Bur r Littl e Ello n Littl e Risch G •Gran d Vie w N e w Yea r Silen t Frien d Kokom o Anni e C

. Dolli e B

. Polaris No

. 1,

. 2 an d 3 Lizzi e C

. Ell a C.

- Famou s Wei l (unpat. ) Patrici a (unpat. } Survey Numbe r

5662 566 2 458 6 454 6 5405

- 540 5 55 0 412 62 1 496 59 5 892 911 9 911 9 1248 6 911 9 9119 455 4 497 1 Grou p 2 : Mar y . 74 0 Resurrectio n 74 1 Resurrectio n No

. 1 t o 15 , inclusiv e 926 9 Wha t i s Lef t' 4970 Je w 714 1 Golcond a 369 0 Christma s 76 3 Lbga n f 1958 1rtoo k 40 0 Pan e

Zanziba r Nos

. 1,2, 3 an d 4 1238 9 Marth a 103 2 Bo w 1177 7 Veg a Group

, includin g th e Andrew s Trac t (al l interes t therei n owne d b y th e Grantors) 911 2 Malvin a 515 2 Arlingto n 136 6 EXCLUDING

, HOWEVER

, th e t>. • '

. 1 owing : A l l tha t portio n o f tha t certai n drainag e an d transportatio n tunnel
, includin g al l existing lateral s directl y o r indirectl y connecte d t o said tunne l commonl y known a s th e Ya k Tunne l (th e porta l
o r entranc e o f whic h i s situate d o n Lo t 1 o f th e Graha m Place r Minin g Claim

, Surve y No

. 56 3 Am

. i n th e southwes t quarte r o f Sectio n 30 , T

. 9 S.

, R

. 79 w. , 6 t h P.M. ) whic h lie s withi n th e sai d propert y conveye d hereby
, said Ya k Tunne l havin g formerl y been th e propert y o f th e Ya k Mining
, Millin g an d Tunne l Company

, a Colorad o corporation ,

bu t whic h i s no w owned
, b y an d t h e propert y o f th e Gr.nnt.or s heroin
, excep t tha t th e Grante e shal l hav e th e non-exclusiv e

righ t t o maintai n an d us e th e sai d Yak Tunne l an d lateral s withi n sai d Y a k Tunne l (includin g specifically

th e Fann y Rawling s Surve y 46 1 lateral)
, an d lateral s withi n sai d propert y hereb y conveye d fo r drainag e an d othe r purpose s i n connectio n wit h his minin g operations , provide d howeve r tha t suc h us e shal l b e a t Grantee' s sol e risk an d ex pense

. Th e Grante e shal l indemnif y an d save th e Grantor s harmles s fro m an y damage > liability
, los s o r expens e suffere d o r incurre d b y th e Grantor s in connec tio n wit h suc h usage , an d Grantor s shal l have n o obli

gatio n t o repai r o r maintai n sai d Ya k Tunne l an d sai d lateral s bu t th e physica l conditio n thereo f wit h re spec t t o safety
, fitnes s fo r intende d us e o r otherwis e shal l b e a t th e sol e ris k o f Grante e an d withou t an y liabilit y therefo r o n th e par t o f Grantors

. Grantor s als o reserv e th e righ t to , a t an y time , sea l of f air passage s in th e Ya k Tunnel
, an y lateral s therei n o r an y othe r ai r passage s t o o r fro m an y propertie s Owne d b y eithe r Grantor

. Th e aforesai d righ t t o use , th e indemnit y b y Grante e i n favo r o f Grantors

, th e absenc e o f an y obligatio n t o repai r o r maintain , an d th e righ t t o seal ai r passages , shal l allb e covenant s runnin g wit h th e lan d t o th e benefi t an d burde n o f th e dominan t an d servien t lands

. • EXCEPTIN

G an d RESERVING

, i n fa v c o f Grantor s an d al l th e land s no w owne d b y them
, a right-of-vn y throug h an d across the propert y conveye d hereb y an d throug h an d acros s al l propert y whic h th e GRANTE E

may hereafte r acquire , fo r th e purpos e o f constructio n o f lateral s o££ said Ya k Tunne l o r th e extensio n

o f existin g lateral s connectin g directl y o r indirectl y w:t h

-2

-Book

- 40 0 Pag e 9 9

sai d Ya k Tunnel

. T h e partie s furthe r agre ^ a z follows : 1

. Th e GRANTEE

covenant:: ; t.hat h e shal l indemnif y an d save GRANTO

R harmles s fro" » an d agains t an y damage
, liability
, los s o r expens e suffere d o r incurre d b y

- GRANTO

R a s a resul t o f wate r originatin g fro m th e propertie s hereb y conveyed
, subjec t t o his afore

said righ t t o us e th e Ya k 'runne l to r drainag e purpose s fo r suc h water s an d oubjec t furthe r t o th e reservatio n tha t th e GRANTEE

shal l no t b e responsibl e hereunde r fo r an y chang e in characte r o r compositio n o f suc h water s afte r th e sam e « leave
, th e Yak :TuhneIV ; GRANTOR S

3ha1 1 hav e th e

. •

. . righ t t o go upo n the pjjbpert ^ hereb y conveye d .:•."•: "

. fo r .th e purpos e o f inspectio n an d investigation ,

. wit h measurin g device s an d th e righ t t o tak e •

. samples o

f wate r fo r th e purpos e o f determinin g

- t o GRANTORS

satisfactio n whethe r th e aforesai d

. " •

. covenant

b y GPANTE

E i s bein g performed

. 2

. GRANTOR S

an d GRANTEE

d o eac h covenant t o th e othe r

. ••'

. tha t the y an d he
, wil l no t pollute th e ai r o f th e Ya k Tunne l no r obstruc t o r interfer e i n an y wa y

. /wit h th e quantit y o r quality.o f th e ai r i n an d '..-;:..:.. . flowin g throug h sai d Ya k Tunnel
, an d eac h o f sai d ""'• : partie s indemnifie s .the othe r against'al l liability
, • los s an d 'expens e b y reason o f an y breac h o f sai d '•'.' • •' • covenant

. 3.

: GRANTEE

covenant s that h e wil l no t us e th e nam e "Resurrection " i n connectio n wit h th e operatio n ; o f th e propertie s conveyed hereb y no r wil l an y corporatio n o r compan y ownin g o r operatin g the

. . propertie s conveye d hereb y us e suc h nam e so lon g a s th e sei d "Res-Asarc o

join t Venture " i s activ e

.-. - 'i n busines s i n Colorado

. ;•'•' • Th e

covenant s se t fort h unde r th e aforesai d item s 1," 2 and 3 ar e covenant s runnin g wit h the lan d and shal l bind

and run i n favo r o f the servien t and dominan t land s and sb^ U bin d th e heirs,-persona l

representatives ,

successor s

an d assign s

o f th e partie s hereto
, wh o ma y becom e successor s i n titl e 'thereto

. T O HAV E AN D T O HOL D th e sam e unt o th e GRANTEE

, his heirs
, persona l representatives ,

an d assigns , forever

. GRANTOR S

d o

no t warran t th e titl e t o th e propertie s conveye d hereb y an d this indentur e shal l b o considere d a s a Bargai n an d Sale Deed i n accordanc e wit h §118-1-15
, Colorad o Revise d Statutes

, 1963

.


## -3

- ; *Boo k 40 0 Paq e 10 0

I N WITNES

S WHEREOF

, th e partie s heret o hav e execute d thi s effectiv e th e dat e firs t above-written

. f i - : ATTES T t /

. -i.': " • "'

. J • > • *' '"' *
'--- A ^

- S.ecretar y Y AMERICA

N SMELTIN G AN D REFININ G COMPAN Y / ^_

. _ j n 

### B y *-XcX

. st-J-«Ji*y£<p{je~^j Vic e Presiden t 

### RESURREx/io N MININ G COMPAN Y ATTEST:

_ - - T Secretar y * C "--''ll 

# .;•-'/• STAT E O F MEW YOR K } Robert

L

. Jone<$ V Gra n te e

ss
. COUNT Y O F NEW YOR K ) T h e foregoin g instrumen t wa s acknowledge d

befor e m e thi s 8t h da y o f June____

_

________

, 1973 , b y T

. A

. Snedden

, Vic e President " o

f Americ.! • *

. Smeltin g an d Refinin g Company

. Witnes s m y han d an d officia l seal

. Notar y Publi c o f th a SV&t e o f New Yor k ? f; [ M y commissio n expires : - j "•"'•.- ! , 

### M»R! $ i

. stccx

. a . : :' t 

### '••

. " STAT E O F NE W YORK ) ss
. Hi

. H H;K5»

. :*i:.": J '• * >/:;•<«•.: « {<::. !.:•:» a »: » »:•• » Ccs.i. f C...^:.'.i. » [•;•:<-

. Mot h JO
, H M COUNT Y O F NE W YOR K ) Th e foregoin g instrumen t was acknowledge d befor e q e thi s 

## • y da y o f
,

1973 , b y /.

.

__________ /

o f Ressurectio n

Minin g Company

. Witnes s m y han d an d officia l seal

. f.^.- i " 

# • c>

STAT E O F COLORAD O ) • V ?

:

~ )

SS

. CIT Y AN D COUNT Y O F ) DENVER ) Notar y

Publi c o f th e Stat e o f' . { N e w Yor k

'. .

. M y commissio n expires : '•"/
, CAMttl E RUSS O NOTAR Y FOV v C X Slit * o r H. « Tbi k N o

. 14.)4071I » QtiilititJ i n Kin^ t Counf y Ce'»

. fili d i n N4 W Yorl i Count- / CenriittiO n Expire s Mire d 30 , lf7 S •' .' •

i' \

T h e foregoin g instrumen t wa s acknowledge d

befor e m e thi s

-4

-

## ~ \

Boo k -10 0 Pag e 10 1

da y o f
,

1973 , b y Rober t L

. Jone s

..... . ..Witnes s m y han d and officia l seal

. Notar y publi c '*yOciArt8Tii§sio n expires :

-5

-EXHIBI T C1*301
-

O ' S O ' S O'S C O'ZC Z O'S T O'tC

. O'T T OCO' O Z80' 0 10'0 > ZO' O
w o ST' O SZ' O EM- 0 .T000'0 > ZOOO' O WZ' O TOOO't e SOOO' O LI' 0 T000'0 > T000'0 >

« ' 0 TOOO'O i tOOO'CC * TC' O 1000'0 > T000'0 > T f O TOOO' O I000'0 > K ' O T000-0 > T000-0 > 60' 0

ZO' O ZT' O 9Z-0 ZO' O LfQ BT' O EI' O ZI' O tro »t* 0 EZ' O OC' O
w o T00'0 >

«' 8 TOO'Q > 6S' 8 T0'0 > 80' 8 OT' O Ot' 8 TO' O er e ZO' O tO' 8 ZO' O SC' 8 TOO' O

ZOO' 0 T0'0 > 6T' 0 CO' 0 CO' 0 CO' 0 TOO'Q >

T00'0 > WOO' O TOO'f e COO' 0 MOO' 0 I0'0 > TO' O TOO' O W O SO' O

TOO' O T0'0 > TO' O TOO' O TO' O ZO' O 9000' Q T0'0 > W O COOO' O

98/TZ/T T VTOO' O 98/6Z/O T T00'0 > 98/9T/6 T00'0 > 98/ZZ/8 ZOO' 0 98/VO/ 8 1000' 0 98/CZ/ 9 T00'0 > T00'0 > 98/80/ S p»pa»d«n g •»»o«8a» M »t»u»8a» H <

M ne w TJT» £
960C E T61Z C ant ISH )Haze n Reeearch

, Inc

. 4601 Indian a S t • Golden

. Coi o B040 3 Tel ; (303 ) 27S-450 1 • Tele x 45-86 0

* rirr- r an : tarr

- Tl'r

. rete r CCSE- : * • Pos t Offic e fco : 1 1 teadvili e Colorad o B04fc l H F I SEFIE s KCi

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## cus

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REPOR T D F SAMPL E IDENTIFICATION : CDB- 1 PARAMETE R Acidit y a s CaC03.Rc/l Alkalinit y (Tota l )e s CaCD3.ffic/ l Aluninuc.mo/ 1 (D ) AluminuB.mo/ l <T ) Artinon y ,B>q/ l (D ) Antimony
, fi g / i (T ) Arsenic
, Bg/ 1 (D ) Arsenic

. mo/ 1 (T ) Earium,tig/ l (D ) 6ariua.BQ/ l IT ) bery l 1 iufn,mg/ l (D ) &eryl l ium,ng/ l (T ) Bicarbonat e a s CaC03,diq/ l CadniUB,mg/l (L) Cadniufli.ttg/ l (T ) Calcium

, ag/ 1 (D ) Calcium

, eg/ 1 (T ) Chlorid e (Cl-),ng/ l ( D ) ( T ) Cobalt

, eg/ 1 (D) Cobalt

, ng/KT ) Coppe r , Bg/ 1 (D ; Coppe r ,ng/ l (T ) Cyanid e (CN- ) ,reg/ l (T ) CODES : (T)-Tota l (D)=Dissolve d (S)=Suspende d (R)=Recoverafal e < c Les s Tha n B Y: RESUL T

14 6 <0.0 1 0.0 2 

## <:o.05

- <0.0 5 <0.00 1 <0.00 1 0.04 4 C.04 t <0.00 5 <0.00 5 14 6 

### <o.oo : <0.00 l 50. 2 50. 5 < 1 <0.0 1 <0.0 1 0.0 3 0.0 4 <0.0 1 0.0 1 <0.00 1

Rober t Rosta c Laborator y Manage rHaze n Research

, Inc

. 4601 Indian a St

. • Golden

, Colo

. 6040 3 Tel : (303 ) 279-450 1 • Tele x 45-66 0 DAT E

HRI.PROJEC T H R 1 SEfclE S NO

. DATE RECD

. CUS T P.O. * Cosgri H bun n an d Barr v M r

. Pete r Cosgri-f f Pos t O H ic e Bo x 1 1 Leadvill e Colorad o 8046 1 REPOR T

O F ANALYSI S SAMPL E IDENTIFICATION : CDfc- i PARAMETE R Iron,ng/ l (D ; Iron,Kg/1(T J Lead,oig/ l (D ) Lead,mg/l(T ) Magnesiufli,B!g/ l (0 ) Magnesium,ng/1(T

) Manganese,rcg/1(D ) Manganese,ng/1(T

) Mercury,rag/1(D ) Mercury,rng/1(T ) Nickel,ag/l(D ) Nickel
, ng/KT ) p H Potassium,ing/ 1 (D ) Potassiuc,isg/ l (T ) ( D ) Beleniuu,«ig/ l (T ) Silver

, oig/ 1 (D ) Silver

, ng/KT ) ( D ) Sodiuo

, fig/ 1 (T ) Solids(DisEolved)

,ng/ l Solids(SuEpended)

,Big/ l Specifi c Conductanc e (2 5 deg.C ) ,unho/C K SuHat e a s S04,ng/ l CODES : (T)=Tota l (D)=Di£solve d (S)=Suspende d (R)=ftecoverabl e < =Les s Tha n B Y : RESUL T O.O E 0.2 5 0.02 0.0 3 30. 4 30. 4 

## o.i e 0.22 <0.000i <0.000 1 0.0 6 0.1 0 8.3 5 i.7t 1.7 7 <0.00 1 <0.00 1 <0.0 1 <0.0 1 2.2 2 2.2 5 26 8 1 1 35 0 108 «ev e 198 6 002-571 3256 7 4/18/8 0

Rober t Rosta d Laborator y Manage r

## I

Haze n Research

, Inc

. 460 1 Indian a St

. • Golden

. Col o 8040 3 Tel: (303 ) 279-450 1 • Tele x 45-86 0 Cosori' H Dun n an d Barr v M r

. Pete r CosgrH f Pos t DHic e Bo x 1 1 Leadvill e Colorad o 8046 1 DAT E hia v

£ H R I PROJEC T 002-E7 J Hft l SERIE S MD

. 3256 7 DAT E RL'CD

. 4/15/9 : CUS T F.D. t

REPOR T O F ANALYSIS SAMPL E IDENTIFICATION : CDB- 1 PARAMETE R Thallium,mg/1(D ) Thalliur.,iRQ/ l (T ) Tin,Rg/HD ) Tin,EQ/l(T ) Vanadiuffi.mg/ l (D ) VanadiuBi.mo/l (T ) Zinc,mg/l(D ) Zinc,«g/l(T ) RESUL T

<0.0 1

<0.0i <0.0 1 0.2 5 0.3 4

CODES : (T)=Tota l B Y:

(D)-Dissolve d (R)=Recoverabl e < "Les s Tha n Rober t Rosta d Laborator y Manage r

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. Pete r Ccsgri H Pot t O H it s 6o x ! 1 Leadvill e Ccloradr BC46 I 

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'. T K.anganesE,Eg/i (T

- rte*cary,sg/HD ; hercury,Big/ l CT ; Nickel
, eg/ 1 (D ; p H Potassium
, r.g/ 1 (D : Pot£SE3UB,(Cg/ l

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, , Silver

, sig/!(D i Silver

, Kg/ 1 (T ) Sodiur,,ng/l(D ) £odiuo,ng/ l (T ) SolidetDiESolved )

,cg/l SolidE(Suspended)

,cg/ i Sulfat e a s S04,cg/ l Thalliue,«g/ l (D ! Thslliue,ng/l(T ) Tin
, Eg/ 1 (D ) CODES : m«=7ota i (D)=Disso)ve c HF: I PFCJEC HF: ! E DAT E P.ECD

. CUS T P.O. *

P £ S

'_ (.0 2 

## o.o : 3c. V i :£. :

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, Inc

. 460 1 Indian a St

. • Golden

. Goto

. 6040 3 Tel : (303 ) 278-450 1 • Tele x 45-86 C Co&grift * Dun n an d tarr y fj*.r

; ,.-.^€te r Cosorif f Cf'bV t Offic e fo x ! I Leadvili e Colorao c 8046 1 SAMPL E CDr- 2 DATE H &

. ; PROJEC T HP.

- 5EF1E S KC

. DAT E RECi

. C'JS T S .C. *

REPOr " 0 = ftNALY5! £ Zvr.e 2 " 002-38 V 5'30/6 s

7in,ttc/l(T) Vansdiur..RC/ l (D ) Vanaciur M «ic/ ! -!T ? 

### Zinc.,Bic,' l {:: • l (T ) Spsci*i c Conductanc e (2 S bec.C 3 ,uir.ho/c p Loppe r ,rg/ l (T

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### 0

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< =Let s Tha n B Y : Rober t Rosta d Laborator y Manaoe

-

# o

Haze n Research

, Inc

. 4601 Indian a St

. • Golden

. Colo

. 6040 3 Tel : (303 ) 273-450 1 • Tele x 45-86 0 Cosgrif f Dun r & Berr y Pos t Offic e Bo x 1 1 Leadvill e Colorado 8046! DAT E H R I PROJEC T H R I SERIE S NO

. DAT E RECD

. CUB T P.O. * Augus t

4 002-94 V 3309 6 7/il/e t 1996 *

REPOR T 0 ? ANALYSI S SAMPL E IDENTIFICATION : CDB 3 PARAMETE R'' • ( T ) CadB!iun,ag/l(D ) Copper,ffig/1(T ) Copper,mg/l(D ) Lead,Bg/l(T ) Lead,ng/I(D ) Manganese,rag/1(T

) Manganese,mo/1(D i Hercury,»g/l(T ) Mercury,aig/ 1 iD ) Zinc,Bg/l(T ) Zinc,eg/1(D ) P H SolidstSuspended )

,aig/ l RESUL T

0.00 2 0.00 1 0.0 1 <0.0 1 0.03 0.0 1 0.2 3 0.0 2 <0.000 1 <0.000 1 0.3 1 '0.0 6 8.1 3 1 5

CODES: (T)=Tota l <D)=Di£EDlve d (S)=Suspende d (R)=Recoverabl e < «=Les 5 Tha n Rober t Rosta d Laborator y Manage r Correctio n t o repor t date d Jul y 24 , 1986

.Haze n Research

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. 460 1 Indian a SI

. • Golden

, Colo

. 8040 2 Tel: (303 ) 279-450 1 • Tele x 45-86 0 H R I

PROJEC T H R I SERIE S NO

. DAT E RECD

. CUS T P.O. * ftuguE t

2 2 196 t 005-172 3337 6 

## B/e/e t CosgrH f Dun n an d Berr y M r

. Pete r Cosorif f Pos t Offic e Bo x 1 1 Le.advill e Colorad o 8046 1 REPOR T

O F ANALYSI S SAMPL E IDENTIFICATION : CDB- 4 PARAMETE R CadffliuB,flig/ l (T ) Cadf.iuBi,uig/l(D ) Copper,mg/l(T ! Copper,mg/l(D ) Lead,ntg/ l (T) Lead,mo/1(D ) Kanganese,ag/l(T ! Manganese,mo/1(D ) Hercury,BiQ/ l (T ) Mercury,pg/1(D i P H S o l id s (Suspended) .Big/ ! Zinc,mg/1(T) Zinc,«ng/ l <D ) RESUL T
<0.00 l <0.00 1 

## o.o e 0.0 4 0.1 9 0.1 0 0.2 6 C.1 4 <0.000 1 <0.000 1 8.1 0 232 0.2 7 0.0 2

CODES : (T)=Tota l (S)-Suspende d
< =Les s Tha n B Y : (D)=Dissolve d (R)=Recoverabl e Rober t Rosta d Laborator y hanage rKaze n Research

, Inc

.

_ . ^

_ _ . 450 1 Indian a S : • Golden

. Coi o 8040 3 KAZE N Tel: (303 ) 279-450 1 • Tele x 45-86 0 CoEcrif t 1'L.nr

, an d K F ! r-RDJEC T 33/47

-

9/lt/ B
Leatvill e 8J<c i
Ct'E-E

- PfcRftME'EF : Cadmium

, &a/ l (D < Coppe r ,.Ti?/ l ( • •

, r c / i RESLL " <C.OO

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### o . i : c.oco ; Solid s (Buspenflfed ; .ir : Zi n c ,ir,g/ l (T ; Zinc,ir,o/ i (D ) t , O r

CODES : ( T ; ( B ) vc- c

(R)=Fcecovereb i e Tha n Rober t Rosts s Lcborator y hsnsge r

# Poo r Qualit y Sourc e Document T h e followin g documen t images hav e bee n scanne d fro m the bes t availabl e source copy

. T o vie w the actual har d copy , contac t the Superfun d Record s Cente r at 303-312-647 3Haze n Research

, Inc

. 4601 Indian a St

. • Golden

. Colo

. 8040 3 Tel : (303 ) 279-450 1 • Tele x 45-86 0 DAT E

H R I PROJEC T H R I SERIE S NO

. DAT E RECD

. CUS T P.O. * Decembe r

1 198 6 009-18 7 3415 1 10/29/Bc * Leadvill e Corporatio n M r

. Dougla s Christopherso n Pos t Offic e Bo x 93 3 Leadvill e Colorad o 8046 1 REPOR T

O F ANALYSI S SAMPL E IDENTIFICATION : CDB- 6 PftRfiHETE R Cadmium,uig/ 1 (T) Cadffliusi,uig/ 1 (R ) Copper,nQ/1(R ) Lead,mg/KR ) Mercury,mg/l(R ) Solids(Suspendsd),mg/ l Zinc,mg/l(R ) Cadmium,mg/1(D ) Copper,mg/l(T) Copper,mg/l(D ) L s a S

, (T i g / i (T ) Lea c ,fHQ/ i (D ; Manganese,IR§/ 1

CT ; Manganese
, Kiy/ 1 <'D ) Mercury,n;g/ i (T > Mercury,-ng/l tD ) p H Zinc,ng/l(T ) Zinc,ir,g/ l (D ) RESUL T
0.001 4 0.000 7 0.00 3 0.00 2 0.000 2
0,20 9 0.000 4 0.00 3 <0.00 1 0.00 2 <0.00 i 0.1 2 0.0 2 .0.000 6 <C.000 1 B.5 9 0.20 9 0.08 2

CODES : (T)=Tota l (D)=Dissolve d (S)=Suspende d (R)=Recoverabl ^ < =Les s Tha n Rober t Rosta d Laborator y Manage r *Dat e o f additiona l reques t - NoveT.&e r 19

.

# 0

Haze n Research

, Inc

.

. .--^li"! 460 1 Indian a St

. • Golden

, Colo

. 8040 3 HAZE N Tel: (303 ) 279-450 1 • Tele x 45-86 0
Leadvill e Corporatio n M r

. Dougla s Christopherso n Pos t Offic e Bo x 93 3 Leadvill e Colorad o 8046 1 DAT E H R I PROJEC T H R I SERIE S NO

. DAT E RECD

. CUS T P.O. * Novembe r

1 3 198 6 009-18 7 3415 1 10/29/8 6

REPOR T O F ANALYSIS SAMPL E IDENTIFICATION : CDB- 6 PARAMETE R Cadmium,mg/1(T > Cadmium,mg/ l (R ) Coppe r ,mg/l(R ) Lead,mg/l(R ) Mercury,isg/1(R } Solids(Suspended),mg/ l Zinc,mg/l(R ) RESUL T
0.001 4 0.000 7 0.00 3 0.00 2 0.000 2 3 0.20 9

CODES : (T)=Tota l (D)=Dissolve d (S)=Suspende d (R)=Recoverabl e < =Les s Tha n Rober t Rosta d Laborator y Manage rHaze n Research

, Inc

. 4601 Indian a St

. • Golden

, Colo

. 6040 3 Tel : (303 ) 279-450 1 • Tele x 45-86 0 Leadvill e Corporatio n H r

. Dougla s Christopherco n Pos t Offic e Bo x 93 3 

### Uadvill e Colorado 6046 1 DAT E H R I PROJEC T H R I SERIE S NO

. DAT E RECO

. CUS T P.O. I Decembe r

009-18 7 3433 4 11/21/8 6 1 0 198 6

REPOR T O F ANALYSI S SAMPL E IDENTIFICATION : CDB- 7 PARAMETE R Cadeiun,«>g/ l <T ) Cadaiua,iig/ l (D ) Copper,eg/HT ) Copper,«g/l(D ) Lead,ig/HT ) Lead,«g/l(D ) Manganese
, ng/HT ) Manganese,eg/1(D ) Mercury,ag/1(T ) Mercury,ag/HD ) p K Solidt(Suspended),«g/ l Zinc,«g/l(T ) 

### Zinc.ag/HD ) RESUL T 0.0005 0.000 4 <0.00 1 <0.00 1 0.004 <0.00 1 0.13 0.0 9 0.000 2 <0.000 1 8.3 7 5 0.08 3 0.030

COOES : m « = Tota l (D)>Dissolve d 

### (S)=SuBpende d (R)«Recoverabl e < «Les s Tha n B Y : 

### Rober t Rosta d Laborator y Manage rEXHIBI T Dr I

r /*> / t^.?. M '**$< ('•O l 

## COLORAD O

DEPARTMEN

T O F HEALT H Richar d D

. Lam m XJS ^ M ^>SX.J/ Thoma s

M

. Vernon
, M.D

. Governo r X

J f i 7 %>^r Executiv e

Directo r Novembe r 7 , 198 6
M r

. Dou g Christopherso n Leadvill e Corporatio n P.O

. Bo x 933 Leadville

, Colo

. 8046 1 R E : Discharg e Permi t Applicatio n Completenes s

Revie w Leadvill e Corporatio n CPD S NO. : CO-004150 5 Lak e Count y Dea r Mr

. Christo ; r i W e hav e reviewe d th e above reference d applicatio n fo r a discharg e permi t and hav e foun d i t t o b e incomplete

. Pleas e submi t the result s o f analysis fo r th e aci d fractio n o f th e priorit y pollutant s a s discusse d wit h yo u o n 9/29/6 6 and again o n 10/30/86

. A s discusse d wit h yo u o n Septembe r 29 , 198 6 th e poin t o f discharg e fro m you r facilit y wil l have a significan t impac t o n permit conditions

. I f discharg e i s othe r tha n vi a th e Yak Tunnel
, fo r exampl e t o Bi g Evan s Gulch

, effluen t limitation s ma y be mor e stringen t bu t ther e ar e les s lega l complexitie s

an d a mor e timel y permi t i s likely

. Additionall

y existin g dat a yo u provide d show s th e qualit y t o b e fairl y clos e t o meetin g standard s fo r Bi g Evan s Gulch

. I f discharg e i s via th e Ya k Tunnel
, extrem e lega l complexit y i s likel y becaus e o f curren t litigatio n a s wel l a s comple x technica l issue s arisin g fro m effluen t limitation s a t th e poin t o f discharge
, whic h i s th e portal

. I t woul d therefor e b e necessar y t o isolat e flow s fro m you r propert y t o th e porta l o r t o collec t a simila r volum e o f wate r a t the porta l and trea t i t t o prope r limitations

. Discharg e vi a th e Ya k Tunne l wil l likel y requir e complianc e wit h technolog y base d effluen t limitation s a s they ar e generall y more stringen t than wate r qualit y standard s fo r Californi a Gulch

. I f you r contributio n i s isolate d t o th e portal
, i t i s likel y maintenanc e wil l be a significan t problem

. I t a simila r volum e o f wate r i s treate d a t th e portal
, extensiv e treatmen t wil l b e necessar y becaus e o f reduce d qualit y fro m passag e throug h th e tunnel

. Pleas e giv e this matte r carefu l consideratio n and let u s kno w whic h discharg e mod e i s desire d or i f yo u ca n thin k o f another

. I f yo u car e t o discus s i n mor e detail
, w e wil l be happ y t o mee t wit h you .

421 0 EAS T 11T H AVENU E DENVER

, COLORAD O 8022 0 PHON E (303 ) 320-833 3Pag e

2

A s a fina l point, pleas e b e awar e tha t yo u shoul d conside r post-minin g hydrolog y befor e activel y minin g thi s site

. Yo u wil l b e hel d responsibl e f o r th e qualit y o f th e effluen t iro m this facility eve n afte r minin g a t thi s sit e ceases
. I f th e discharg e i s t o Bi g Evan s Gulch

, a discharg e permi t wil l stil l b e required

. I f discharg e i s vi a th e Yak Tunne l th e situatio n is quit e complex ; your responsibilit y fo r your effluen t wil l stil l b e maintaine d an d wil l likel y nee d t o b e compatabl e wit h an y resolutio n o f th e curren t litigation

. I f yo u hav e an y questions , pleas e fee l fre e t o contac t m e a t 320-8333 , extensio n 3463

. Sincerely

,

## 4 ^.•-* Jud y Bruc h Publi c Health Enginee r Permit s an d Enforcemen t Sectio n WATE R QUALIT Y CONTRO L DIVISIO N JB/nj f

x c : Ken t Hanson
, Attorne y General' s Office
, CEKCL A Jerr y Goad

, Attorne y General' s Office
, WQC D Caro l Russell

, Drinkin g water/Groun d Wate r Section

, WQC D Count y Healt h Departmen t Permit Section

, Environmenta l

Protectio n Agenc y Gary Soldano

, D.E.

, Field Suppor t Section

, WQC DEXHIBI T EPARAMETE R

A S (T ) C D (TR ) CU (TR) P E (TR) F E (SOL ) M G (SOL ) KG (T ) M I (R ) S E (T ) Z N (R ) F E (R ) K G (R ) T S S 7-16-8 7 C D H PERMI T LIMITATION S 0.1700 0 0.0003 0 0.0100 0 0.0040 0 0.9300 0 0.1500 0 

### 0.0002 0 0.1300 0 0.0240 0 0.1800 0 3.3000 0 3.4000 0 25.0000 0 Propose d Wate r Qualit y Afte r Treatment * CDB- 6 C D H SPLI T L O W TS S HOT E A 0.0007 0 0.0030 0 0.0020 0 HOT E E NOT E E NOT E C NOT E & NOT E I 0.2090 0 NOT E A 0.1200 0 3.0000 0 SEGMEN

T 7 EVAN S GULCH STANDAR D 0.0500 0 0.0010 0 0.0100 0 0.0040 0 0.3000 0 0.0500 0 0.0000 5 0.0500 0 0.0100 0 0.1000 0 1.0000 0 1.0000 0 Elkhor n Shaf t R<000 5 .001 .00 3
.000 3
.02 2

< 5 

### NOTES : (A ) No t analyze d for ; Se e CO B 1 an d CD S 2 fo r data : A T ? o f Saiples : A S
- 0.00 1 C D B 1 an d CD B 2 N X
- 0.06 5 S E
- 0.00 2 F E
- 0.5 8 (T ) 

### ( B ) Ho t analyze d unde r paramete r protoca l indicated
, ( C ) Averag e o f AL L L.C

. YA K Sample s H G C D B 7 : H G (T ) = 0.000 2 TS S « 5 

### C D B 6 : H G (T ) B 0.000 8 0.0001 4

*Thi s I B a n actua l physica l sampl e wit h lo w TSS

. Thi s sampl e demonstrate s th e potentia l wate r qualit y base d o n propose d treatmen t t o reduc e suspende d solids

.EXHIBI T FHaze n Research

, Inc

. 460 1 Indian a S i • Golden

. Coio 80-10: 1 7 < > .t r >m . Ti-i..

. .i'

. .".L I DAT E MR I PROJEC T H R I SERIE S NO

. DATE RECD

. CUS T P.0. « Leadvill e Corporatio n M r

. Doucla s Christopherso n Pos t Offic e Bo x 93 3 Leadvill e Colorad o B.046 1 Jun e 1 196 ? 009-18 7 35515- A 4/4/8 7

REPOR T O F ANALYSIS SAMPL E IDENTIFICATION : B E 4 4 7 PfiPftHETE R Uraniua.oC i /!•''; • Gros s Aloh a t * -Fre e is i o n • Gros s Bet a i + -Precis i or , • Radium-22 6 •

. *-Pra c j s i or . t « . c>
. •

.
A l l-a l i n i tv t Tota l ; a s CaCO'.ir.g/ I Aluminum.ng/ 1 iD > Antiitony,ng/ l (T ) Arseni c ,BiQ/ l (T ) BariuR,«g/l(T ) Bery l 1 iu(n,Rg/ l (T ) Biologica l Oxyge n Demand! 5 day),mq/ l Boron,mg/1(T ) Cadmiufi.mg/ 1 (T ) Chlorid e (Cl-).mp/ l Chroniun(VI ) .ir,Q/ l Chroitiun.KQ/ 1 i D C o l i form s (Feca l i ,pe r 10 0 t, l Copper,RO/1(T ) •Cvanid e <Tot« l a s CH-i.wn' i Cyanid e <Free),*q/ l Fluorid e (F-),»q/ l Iron,tg/l(T) Iron,ng/l(D ) RESUL T

2

. 1 <*-1.7 ) 1.61+-5.5 J 0.0(+-4.8 i
13 4 0.0 7 <0.0 1 0.1 2 <0.0 1 2 0 <0.0 5 <0.00 1 7. 9 <0.0 1 ^.01 < 2 O.O B 0.03 <0.0 1 0.1 2 

## o.oe O.O B
CODES : <T)«Tota l (S)«Su«p«nde d < "Let s Tha n B Y : <D)=Disso l vec i (R)«Recover»b U Rober t Rosta d Laborator y Manage r Uraniu m result s reporte d assumin g th e activit y o f natura l U « 6.7 7 X 10- 7 Ci/ g •Variabilit y o f th e radioactiv e 01sintegratio n

proces s (countin g error) a t th e 9 T confidenc e level,1.9 6 x sigm aHaze n Research

, Inc

. 460 1 Indian a St

. • Golden

. Coio 8(Wf>:'

. Tel : (303 ) 279-<»f>O i • !«>M- > •:'

. r-.r. n DAT E

M R ! PROJEC T H R I SERIE S NO

. DAT E RECD

. CUS T P.O. * Jun e

1 19B 7 009-18 7 35515- B 4/14/8 7 Leadvill e Corporatio n M r

. Dougla s Christopherso n Pos t Offic e Bo x 93 3 

### Leadvill e Colorad o 6046 1 REPOR T

O F ANALYSIS SAMPL E IDENTIFICATION : 8E414B 7 PARAMETE R Lead,<ng/l(T ) Manganese,ng/l(T

) Manganese,mg/1(D ) Mercury,mg/1(T ) Molybdenum,mg/1(T

) Nickel,«g/i m Amnonia(a s N ) ,«g/ l Nitrate(a s N),*g/ l Nitrite(a s N),*g/ l O i l an d Grease,mg/ 1 PH Phenols,mg/ 1 Seleniuc.ng/l(T ) Silver,«g/l(T ) S o l ids(Dissolved),mg/ 1 Solids(Suspended),»g/ l Sulfat e a s S04,Ag/ l Sulfid e a s S,mg/ l Th*lliua,§g/l(T ) -Zinc,eg/1(T ) RESUL T 0.0 1 0.0 4 0.0 2 <0.000 1 0.0 2 0.0 3 0.1 0 0.06 <0.0 1 I 6.2 6 <0. 1 0.01 3 <0.0 1 10 8

<5 1 0 0.0 7 <0.00 5 0.04

CODES : (T)*Tota l {D)*Dissolve d (S)*Suspende d (Rl^Rccoverabl e < 'Les s Tha n Rober t Rosta d Laborator y Manage r

# >' "' 3 Hare n Research

, Inc

. 460 1 Indian a S ! • Goiaen

. Co> o P O Tel : (303 ) 279--ISOi • Toio

. .:•• f-i v M M

I-KOJEC T H R I SERIE S NO

. DATE RECD

. CUS T P.O. * Leadvill e Corporatio n M r

. Dougla s Christooherso n Pos t O H ic e Bo: : 93 3 Leadvill e Colorad o 8046 1 REPOR T

O F ANALYSIS SAMPL E IDENTIFICATION : BE4J22J8 7 PARAMETE R Uranium
, pCi/ 1 (T) Gros s Alphas-Precision ;

*,pCi/ l (R ) Gros s Beta(+-Precjs i

on ) « .pC j ; 1 iT ) Radiu(n-226i+-Precisior> J

*,pCi ; I '.& ) RESUL T

1 3.5J+-2.1 ) 2 . K + -5.5 ) 0.0(+-t.2 ) Jun e

1 5 009-18 7 35587- A 4/23/8 7 198 7

Alka S in i t v (Tota l ) a s CaCO' J • , mg < I A l uminu m ,«tg / 1 : D » A n t imon y ,mg / 1 i T ) Arsenic
, »g/ l (T > Barium.mg/ i U ) Bery l 1 iun,ng/ l (T ) Biologica l Oxyge n Deman d ( 5 day),mg/ l Boron

, mg/ 1 (T ) Cadmium

, mg/ 1 (T ) Chlorid e (Cl-),mg/ l Chrofiiun(VI ) .fng/ 1 Chromium

, «g/l(T > Coliforns(Feca l ) ,pe r 10 0 oi l Coppe r ,ng/ l (T ) Cyanid e (Tota l a s CN-i.<hg' l Cyanid e (Free ) ,wg / • Fluorid e (F- ) ,mg / 1 Iron
, mg/ 1 (T ) Iron.«ig/ l (D ) Lead

, ma ,' 1 (T ) CODES : (T»=Tota l '.S)-Suspende d

. "Les s Tha n 12 4 <0.0 5 <0. 4 0.00 5 0.1 9 <0.0 1 3. 5 0.0 8 <0.00 1 0.3 4 <0.0 1 0.0 1 <2 0.0 1 0.01 5 0.00 6 0.0 7 0.1 3 0.0 7 0

. 0 4 iD)=Dissolve d (R)=Recoverabl e Rober t Rosta d Laborator y Manage r Uraniu m result s reporte d assumin g th e activit y o f natura l U = fc.7 7 X 10- 7 Ci/ g •Variabilit y of th e radioactiv e «J i si.itegra t io n proces s (countin o error) a t th e 95 confidenc e level,1.9 6 M sigm aHaze n Research

, inc

. 460 1 Indian a S t • Golden

. Coi o 80<".n 3 Tel : (303 ) 279-450 1 • Toif x -V
, DAT E

H R I PROJEC T H R I SERIE S NO

. DAT E RECD

. CUS T P.O. ! Leadvill e Corporatio n M r

. Dougla s Christopherso n Pos t Offic e Bo: : 93 3 Leadvill e Colorad o 8046 1 Jun e 1 5 198 009-18 7 355B7- B 4/23/8 7

REPOR T O F ANALYSIS SAMPL E IDENTIFICATION : BE4228 7 PARAMETE R Manganese,ng/1(T

) Manganese,rng/1(D ) Mercury,ng/1(T ) Molybdenum,ng/1(T

) Nickel,«ig/KT > Ammon i a(a s N ) ,mg/ l NitrateU s N ) ,»g/ l NitriteU s N),mg/ l O i l an d Grease,mg/ 1 PH Phenols,fflg/ l Selenium,mg/ 1 (T) Silvir,ig/l(T) Solids(Dissolved),mg/ l Solids(Suspended),ng/ l Sulfat e a s S04,ng/l Sulfid e a s S,»g/l ThalliuB,mg/l(T ) Zinc,«g/l(T ) RESUL T 0.0 2 0.0 1 <0.000 1 <0.0 l 0.0 1 0.0 9 0.1 0 <0.0 1 <0. 5 8.1 7

<0.00 1 <0.0 1 32 6 < 5 1 6 <0. 1 (0.00 1 0.1 2

CODES : ( S ) 'Suspende d
< s Les s Tha n (D)*Dissolve d ( R ) 'Recoverabl e Rober t Rosta d Laborator y Manage rHeze n Research

, Inc

. 460 1 Indian a S t • Golden

. Coi o 80-10 3 T e l (303 ) 27 9 aW M • TH^ > .v . nr. n DATE

M X I PROJEC T H R 1 SERIE S NO

. DATE RECD

. CUE P.O. * Leadvill e Corporatio n M r

. Dougla s Christopherso n Pos t Offic e Bo x 93 3 Leadvill e Colorad o 6046 1 REPOR T

O F ANALYSI S SAMPL E IDENTIFICATION : BE5J5J8 7 PARAMETE R Uranium,pCi/I(T) Gros s Alpha(+-Precision)».oCi/l(T

) Gros s Beta(+-Precision)*.pCi/liT

) Radium-226<t-Precis i

on)*,pCi/I<R > Radium-22 9 (+-Precis i on'*,pCi/nR ) AlkalinityfTotaDa s

CaCC* .mo.'" ! 61uiunum,flig/ l •.D > Antimony,fl>g/ l (T) Arseni c ,«g/l(T ) Barium,mg/l(T) Bery l 1iuo,ng/ l IT) Biologica l Oxyge n Denand(5 day),ng/ l Boron,rag/1(T ) Cadmium.mg/1(T ) Chlorid e (Cl-),mg/ l Chromium(VI),mg/ l Chro»iu(n,itg/ l tT) ColiformctFecal>,oe r

IC O m i Coppe r ,mg/l(T ) • Cyanid e (Tota l a s CN-i.ing/ 1 Cyanid e (Free i ,ng/ l Fluorid e (F-),ng/ l Iron,«g/l(T) Iron,«Q/l(D ) Lead,ng/l(T ) RESUL T 17(+-27 ) 0.0(+-3.0 )

4 4 0.0 2 <0. 2 0.00 2 0.0 4 '.0.0 1 5 0 <0.02 <0.00 1 0.4 1 <0.0 1 <0.0 1 <2 <0.0 1 0.00 7

< 0.00 5 0.0 2 0.0 6 0.0 1 0.04 CODES : <T)=Tota l •:S ) =Suspende d •

. =Les s Tha n B Y : Jun e I S !<?£ 009-18 7 35694- A 5/5/8 7

(D)=Dissolve d (R)*Recoverab l Rober t Rosta d Laborator y Manage r Uraniu m result s reporte d assumin g th e activit y o f natura l U = 6.7 7 X 10- 7 Ci/ g •Variabilit y of th e radioactiv e disintegratio n

proces s (countin g error ) a t th e 9 : confidenc e level,1.9 6 : : sign *

# /
Hare n Research

, Inc

. 460 1 Indian a St

. • Golden

. Got o 8000 3 Tel : (303 ) 279-/i r > n i • Toio x .15-Kfi O DAT E

Hft l PROJEC T H R I SERIE S NO

. DATE RECD

. CUS T P.O. * Leadvill e Corporatio n M r

. Dougla s Christopherso n Pos t Offic e Bo x 93 3 Leadvill e Colorad o 8046 1 REPOR T

O F ANALYSIS SAMPL E IDENTIFICATION : BE558 7 PARAMETE R Manganese,rng/ 1 (T) Manganese,ng/1(D ) Mercury,mg/l(T ) Molybdenum,«g/l(T > Nicke l ,ng/l(T ) Amiaoniaia s K ) ,iiq/ l Nitrateta s N;.ng/ 1 Ni tr i teta s N),mg/ l O i l an d Grease.rag/ 1 P H Phenols,ng/ l Seleniun,mg/l(T ) Silver,ng/1(T) S o l ids(Dissolved),mg/ l S o l ids(Suspended),mg/ l SuHat e a s S04,ng/ l SuHid e a s S,mg/l ThalliuR,«g/l(T ) Zinc,ag/l(T) RESUL T 0.0 1 <0.0 1 <0.000 1 0.0 2 0.0 1 0.0 9 0.1 3 <0.0 1 <0. 5 7.9 0 <0

. 1 <0.00 1 <0.0 1 6 0 < 5 5 <0.0 5 <0.00 1 0.0 4 Jun e I S 196 7 009-1B 7 35694- B 5/5/8 7

CODES : <T)=Tota l (S)»Suspende d
<
. 'Les s Tha n (R)sRecoverabi c Rober t Rosta d Laborator y Manage rHaze n Research

, Inc

. 460 1 Indian a S i • Golden

. Col o 8CM0 3 T e l (30. H ??? ) 'i r . o i • TI-I,. « .!'

. nr.f

. DAT E U K I PKUJt U H R I SERIE S NO

. DATE RECO

. CUS T P.O. * Jun e

2 2 198 7 OuV-16 7 35921- 2 6/5/8 7 Leadvill c Corporatio n M r

. R

. I

. Urnovit : Pos t Offic e Bo x 93 3 Leadvill e Colorad o 8046 1 REPOR T

O F ANALYSI S SAMPL E IDENTIFICATION : BE-06bSB 7 PARAMETER

- Cadfliiun.mg/I<T ) Cadi>ium,tig/ l (D ) Copper,ng/l<T ) Copper,ng/1(0 ) Lead,»g/ l iT ) Lead.mg/1<D ) Manganese,ng/1(T

) Manganese,mg/1(D > Mercury,mg/1(T i Mercury,mg/1(D ) p H Solids(Suspended),rag/ I Zinc,ng/l(T ) 2inc,«g/HD ) RESUL T <0.00 1 <0.00 1 <0.0 2 <0.0 2 0.01 4 0.00 2 vO.O l <0.0 1 X0.000 1 <0.000 1 8.3 6 6 0.0 6 0.0 4

CODES : (T)-Tot* l <S)-Suspende d < =Le« s Tha n DV. C iR)-RecovBrab: c Rober t Rosta d Laborator y Manage rHare n Research

, Inc

. 4601 Indian a St

. • Golden

. Got o 8040 3 Tel

. (303 ) 279-450 1 • Tple x .1 ^ flfi n DAT E

H R I PROJFC T H R 1 SER1L S NO

. DATE RECD

. 

## cus r p.o. « Leadvill e Corporatio n Pos t Offic e Bo x 93 3 Leadvill e Colorad o 8C>4c l REPOR T

O F ANALYSIS Jul

y 2 B 19B 7 009-18 7 3625 3 7/10/8 7

SAMPL E IDENTIFICATION : PARAMETE R Cadniun,«g/ l <T ) Cadniu«i,mg/l (D > Copper,eg/1(T ) Copper,«g/l(D i lead,ff,g/i m Lead,mg/liD ) Manganese,niq / i iT > Manganese,ng/' l '.D > Mercury,ng/ltT > Mercury,mg/l(D ) p H S o l ids(Suspended ) Zinc,»g/l(T ) Zinc,mg/liD ) me/ 1 RESUL T <0.000 5 <0.000 5 0.00 1 <0.00 l 0.00 1 <0.00 1 0.0 1 <0.0 1 <0.000 1 <0.000 1 8.4 2 < 5 0.00 2 0.00 1

CODES: B Y : "Sutpinde d =L65 8 Tha n <D)=Dissclve d <ft}afieco/or62i e Rober t Rosta d Laborator y Manage r

### HAZE N Haze n Research

, Inc

. 460 1 Indian a Si

. • Golde n Coi o 804C 3 Tel : (303 ) 279-<50l • TPIR X 4 5 flr, n DAT E

H K 1 PkOJIL U H R I SERIE S NO

. DATE RECb

. CUS T P.O. * Augus t

2 7 198 ? 009-18 7 3650 6 8/7/8 7 Leadviii e Corporatio n Pos t Offic e Bo; : '3 3 Leadvill e Colorad o O

r SAMPL E IDENTIFICATION : 3E-08|p7|8 7 RESUL T I \T> Caavi t ua.mg/ 1 *D ; Coppe r ,oq/ l (T ) Copue r ,aci ; 1 (D ; Lead,.i>Q/ l <T i Leaa,ao/ l •;[• ; Manganese
, mq / 1 H ) Manoanes e ,.T,g / i >£, • Mercur y ,nq ; i i V ; ttsrcur y ,mg ; 1 (D) p H S o l id s • « Sus p en d £ 0 1 , :in c .mg / 1 iT > Zinc
, ay/ 1 (lit < 0.000 5 < 0.000 5 <0.00 1 < 0.00 1 <0.00 1 <0.0 1 -.0. 0 1 Ui.OOO l <0.000 l S.3 5 < 5 <0.00 i <0.00 1

CODES : (T)sTota l < S > =Suspend« o • > : «Les s Tna n ID;=D:ssolve o Rober t Rocta d Laborator y Manage rHaze n Reaearch

, Inc

. 4601 Indian a St

. • Golden

. Colo

. 8040 3 Tel : (303 ) 279-450 1 • Tele x 45-86 0 DAT E

H R I PROJEC T H R I SERIE S NO

. DAT E RECD

. CUS T P.O. * Jul

y 1 6 198 7 009-18 7 3612 8 6/26/8 7 Leadvill e Corporatio n Pos t Offic e Bo x 93 3 Leadvili e Colorad o 8046 1 (ELKHOR N

SHAFT ) REPOR T O F ANALYSI S SAMPL E IDENTIFICATION : ES-06258 7 PARAMETE R Cadmium,Big/ 1 (R ) Copper,mg/l(R ) Lead,flig/l(R ) Mercury,mg/1(T ) pH(lab ) Silver,rag/I(R i Solid s ;Suspended)@103-10 5

de q C,Eg/ l Z i n c , a g / 1 ( R > C a d ir u urn , rag/' I (T ) Coppe r , rng/1(T ) Silver,ing/ 1 (T ) Zin c ,mg/l(T ) Lead,mg/l(T ) RESUL T
<0.000 5 0.00 1 0.00 3 0.000 3 7.9 0 <0.000 5 <5 0.02 2 <0.000 5 0.00 1 <0.000 5 0.022 0.005

CODES : iT>=Tota l (D)=Dissclve d «3i=Suspende d (R)=Reco\arabl e < =Les 6 Tha n Rober t Rosta d Laborator y Manage r Dat e o r additiona l reques t - Jul y 1Haze n Research

, Inc

. 4601 Indian a St

. • Golden

, Colo

. 8040 3 Tel: (303 ) 279-450 1 • Telex 45-86 0 DAT E

H R I PROJEC T H R I SERIE S NO

. DAT E RECD

. GUST P.O. * Jul

y 1 5 198 7 009-18 7 3612 8 6/26/8 7 Leadvill e Corporatio n Pos t Qf-fic e Bo x 93 3 Leadviil e Colorad o 8046 1 REPOR T

O F ANALYSI S SAMPL E IDENTIFICATION : ES-06258 7 PARAMETE R Cadmium,rag/1(R ) Copper,mg/l<R < Lead,eig/ l (R > Mercury,mg/i(T ) p H Silver,mg/HR ) S o l ids(Suspended),rcc/ 1 Zinc,mg/l(R ) RESUL T <0.000 5 0.00 1 0.00 3 0.000 3 7.9 0 <0.000 5 < 5 0.02 2

CODES : (T)=Tota l (S)=Suspsnde d < =Lss 5 Tha n B Y : ( D > =Di5Eo l lR)=RECoversbl & Rober t Rosta d Laborator y Manage rEXHIBI T GB I G EVAX S a'LCH WATE R QUALIT Y SAMPLE S i Cadriu n Sampl e I.D

. (Date ) 1 T i BE 4 1 4 87 * j <0^

- l B E 4 2 2 87 *' •

<(^- B E 5 3 87 * <(£Q B E 6 5 8 7 <0°^

- B E 7 1 0 8 7 <0°-52 i BE 8 0 7 8 7 ! < 0
» i I Coppe r D j T n/ a ! 0 —

.' ( M n/ a 0 — n/ a :< 0 — 00 1 J3 2 < Q <0-~

-

<0 000 5 0 00 l

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### <oS *

<0 00 i

<0 

### oo i Lea d T 

### o2 L oP A

0 4 0 :1

—

O oo i

<» TM Manganes e

~ f' D T i D n/ a ! O- ^ 1 0 — n/ a : O- 1 0 — n/ a : 0^ 1 .oa i
0 0 2 f' l 0 1 Cf^^^- sir- < 0 — ^00 1 o ! ^Q l

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j T <o5°P l

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. 000 1 pOp i P l l TS S ! Zin c | I T i D j 8 — < 5' 0 — n/ a j ! 1 8

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. < 5 <() 00 1

<() 00 1

t

T

- Tota l Mg/ L D

- Dissolve d Mg/ L * Complete Analysi s o f NPDE S Requiremen t Lis tEXHIBI T H

### E P A REGIO N VII I 

### SUPERFUN D DOCUMEN T MANAGEMEN T SYSTE M
DO C I D # PAGE # IMAGER Y COVE R SHEE T UNSCANNABLEITEMCS ^ Contac t th e Superfun d Record s Cente r t o vie w thi s (these ) document(s)

. (303-312-6473) ,33 3 % U

SIT E N4ME :



### REPOR T O R DOCUMEN T TITLE : 

## vg^ A U DAT E O F DOCUMENT : DESCRIPTION OF IMAGERY :EXHIBI T ISectio n

2.1-Genera l

Concret e Requirement

s 

### 2.1. 1 Genera l F o r th e purpos e o f thes e specifications
,

cementitiou s

material s 

### shal l b e interprete d t o mea n portlan d cemen t o r portlan d cemen t plu s a pozzolan : Provided
, tha t th e pozzolan
, a s specified
, shal l no t
excee d 2 0 percent , b y weight
, o f cement

. Eithe r o f thes e cementitiou s material s ar e suitabl e fo r us e i n al l cast-in-plac e

concret e an d concret e product s excep t portlan d cemen t i s require d fo r grout fo r pressur e groutin g an d grou t fo r backfil l groutin g as specifie d in paragraph s 1.2. 5 an d 1.4.1

. 

### 2.1. 2 Material s a . Cement-Portlan d

cemen t shal l mee t th e requirement

s o f AST M designation : C 15 0 fo r typ e I I cemen t an d shal l mee t th e low-alkal i
an d false-se t limitation s specifie d therein

. Th e low-alkal i limitatio n fo r cemen t ma y b e waive d o n request i f th e san d an d coarse aggregat e 

### d o no t contai n objectionabl

e quantitie s o f potentiall y alkali-reactiv e particle s o n the basi s o f mortar ba r test s an d complet e petrographi c analyse s o f th e propose d aggregate

. Th e cemen t shal l b e fre e fro n 

### lump s an d contaminatio n

b y wate r an d othe r foreig n matte r whe n use d i n 

### concrete

. b

. Pozzolan-Pozzola n

shal l mee t th e requirement

s o f ANSI-AST

M C 6 1 8 fo r clas s N
, F
, o r C wit h th e followin g additiona l requirements : 

### ( 1 ) Th e maximu m percen t o f sulfu r trioxid e shal l be 4. 0 

### percen t fo r classe s F an d C

. ( 2 ) Th e maximu m percen t los s o n ignitio n shal l be 8. 0 percen t 

### fo r clas s N an d 2. 5 percen t fo r classe s F an d C

. ( 3 ) Th e pozzolani c activit y inde x wit h lim e shal l b e determine d usin g 2-inc h cube s an d th e minimum strengt h a t 7 days shal l b e 90 0 

### pound s pe r squar e inch

. 

### ( 4 ) Unles s aggregate s ar e selecte d whic h ar e no t potentiall y alkal i reactive , pozzola n shal l b e teste d fo r reductio n o f morta r expansio n a t 1 4 days as specifie d fo r clas s N pozzola n unde r th e optiona l physica l requirement

s in ANSI/AST

M C 618

. However
, th e cemen t used in 

### th e tes t shal l b e lo w alkali

. Fo r th e pozzola n t o b e acceptable
, i t shal l resul t i n a n expansio n reductio n o f zer o percen t o r greate r whe n compare d t o the contro l test

.

### concret

e reauirement

s pag e 3 Tabl e 2B-San d gradin g requirement

s 

### Siev e No

. 4 8 1 6 3 0 5 0 10 0 

### Pan

. Individua l percent , b y weight
, retaine d o n sieve 0 t o 5 5 t o 15 * 1 0 t o 25 * 1 0 t o 3 0 1 5 t o 3 5 1 2 t o 2 0 3 t o 7 

### * I f th e individua l percen t retaine d on.th e No

. 1 6 siev e i s 2 0 percen t o r less
, th e maximu m limi t fo r th e individua l percen t retaine d on th e No

. 8 siev e ma y b e increase d t o 2 0 percent

. 

### T h e gradin g o f th e san d shal l be controlle d s o tha t th e finenes s modul i (AST M designation : C 136 ) o f a t leas t 9 ou t o f an y 1 0 consecutiv e 

### tes t sample s o f finishe d san d wil l no t var y mor e than 0.2 0 fro m th e 

### average finenes s modulu s o f th e 1 0 tes t samples

. e . Coars e Aggregate-Th e

coars e aggregat e a s batche d shal l consis t


### o f clean / hard
, dense
, durable
, uncoate d roc k fragments

. Coars e aggregat e ma y be rejecte d i f i t fail s t o mee t an y o f th e followin g qualit y requirements : ( 1 ) Lo s Angele s abrasio n los s (AST M designation : C 131 , usin g 

### gradin g A ) .-Te n percen t maximu m los s o f weigh t a t 10 0 revolution's
, o r 4 0 percen t maximum los s o f weigh t a t 50 0 revolutions

. ( 2 ) Sodiu m sulfat e tes t fo r soundnes s (ANSI/AST

M C 88).-Te n 

### percent maximu m weighte d average los s b y weigh t afte r 5 cycles

. 

### ( 3 ) Specifi c gravit y (AST M designation : C 127 ) saturated
, surface-dr y basis.-2.5 4

minimum

. 

### ( 4 ) Deleteriou s

substance s (i n any siz e o f coars e aggregate).

- A s show n i n tabl e 2C

. 

### Tabl e 2C-Allowabl

e percentage s

o f deleteriou s substance s i n coars e aggrega t Maximu m percen t b y weigh t a s batche c 

### Lightweigh t materia l (ANSI / AST M C 123 )

. Friabl e particle s (ANSI/AST

M C 142 )

. 

### Othe r deleteriou s substances

. S u m o f al l th e abov e deleteriou s 

### substances

. 1 / 2 1 / 2 Jus t prio r t o batching
, th e coars e aggregat e shal l b e rewashe d b y pressur e spray an d finis h screene d o n multidec k vibratin g screen s

### concret

e requirement

s pag e 2 ( 5 ) Pozzola n shal l no t detrac t fro m th e resistanc e o f concret e t o sulfat e attack

. Burea u o f Reclamatio n researc h ha s show n tha t clas s 

### N wil l no t detrac t fro m th e durabilit y o f concret e bu t classe s F an d C shal l mee t certain chemica l criteria

. Specifically

,

classe s F an d 

### C shal l hav e a n R facto r les s tha n 2.5 , where th e R facto r i s define d

a s "(C-5)/F " an d wher e "C" i s th e calciu m oxid e conten t i n percen t an d 

### " F " i s th e ferri c oxid e conten t in percent

. Calciu m an d ferri c oxid e content s shal l b e determine d in accordanc e wit h AST M designation : C 114

. c . Water-Wate r

shal l b e fre e fro m .objectionabl

e quantitie s o f silt
, 

### organi c matter , salts
, an d othe r impurities

. d

. Sand-Th e san d a s batche d shal l consis t o f clean
, hard
, dense
, durable
, uncoate d roc k fragments

. San d ma y be rejecte d i f i t fail s t o mee t an y o f th e followin g qualit y requirements : ( 1 ) Organi c impuritie s in san d (ANSI/AST

M C 40).-Colo r n o 

### darke r than th e specifie d standard

. ( 2 ) Sodiu m sulfate tes t fo r soundnes s (ANSI/AST

M C 88).-Eigh t percen t maximum weighte d averag e loss
, b y weight

. 

### ( 3 ) Specifi c gravit y (ANSI/AST

M C 12 8 saturated
, surface-dr y basis).-2.5 8 minimum

. ( 4 ) Deleteriou s

substances.-A

s shown i n tabl e 2A

. 

### Tabl e 2A-Allowabl

e percentage s

o f deleteriou s substance s i n sand_____

_ Maximu m percen t b y weigh t a s batche d Materia l passin g No

. 20 0 sieve (ANSI/AST M C 117)

. 

### Lightweigh t materia l (AST M designation : C 12 3 usin g a 

### solutio n o f zinc chloride)

. Friabl e particle s (AST M 

### designation : C 142)

. Othe r deleteriou s substanc e (such a s mica , coate d grains , soft-flak y particles
, an d loam)

. 

### S u m o f al l th e abov e deleteriou s substances

. 2 1

The sand a s batche d shal l b e wel l graded
, and whe n teste d b y 

### mean s o f standar d sieve s (AST M designation : C 136)
, shal l confor m t o th e limit s i n tabl e 2B

.

### concret

e requirement

s pag e 4 capabl e o f simultaneousl

y removin g undersize d an d oversize d aggregat e fro m eac h of

. th e nominal aggregat e sizes

. I f variation s in th e wate r 

### content o f th e aggregate s enterin g th e batche r occu r durin g intermitten t batching
, the n a dewaterin g screen shal l b e require d afte r th e finis h
screen s t o remov e exces s fre e moisture

. Finis h screen s ma y b e mounte d

ove r the batchin g plan t or on the groun d adjacen t t o the batchin g plant

. 

### Finis h screen s shal l b e s o mounte d tha t th e vibratio n o f th e screen s wil l not b e transmitte d t o the batchin g bin s or scale s and wil l not affec t th e accurac y o f th e weighin g equipmen t i n an y othe r manner . T h e metho d an d rat e o f fee d fo r finis h screenin g shal l b e suc h tha t the screen s wil l not b e overloade d an d tha t the screenin g wil l 

### resul t i n a finishe d produc t whic h meet s th e gradin g requirement

s o f thes e specifications

.

Coars e aggregat e shal l b e fe d t o th e finis h
screen s i n a combinatio n o r alternatio n o f nominal size s whic h wil l not cause noticeabl e accumulatio n

o f poorl y grade d coars e aggregat e i n an y batchin g bin

. Th e finish-screene d

aggregate s shal l pas s directl y t o 

### th e individua l batchin g bin s i n suc h a manner a s t o minimiz e breakage

. 

### Minu s 3/16-inc h materia l passin g through th e finis h screen s shal l b e waste d unles s i t i s route d bac k through a san d classifie r i n a manner whic h cause s unifor m blendin g wit h th e natura l san d bein g processed

. Wate r fro m finis h screening , shal l b e draine d i n suc h a manner a s t o preven t aggregat e was h wate r fro m enterin g th e batchin g bin s an d weighin g hoppers

. Washin g an d finis h screenin g equipmen t shal l be 

### subjec t t o approva l b y th e Contractin g Officer

. Seperatio n o f th e coars e aggregat e int o th e specifie d sizes , afte r finis h screening , shal l be suc h tha t whe n th e coarse aggregat e i s teste d i n accordanc e wit h ANSI/AST

M C 11 7 an d AST M designation : C 136 , i t shal l mee t th e gradin g requirement

s i n tabl e 2D

. Tabl e 2D-Coars e aggregat e gradin g requirements_________________•___

_ 

# f Nomina l maximu m siz e 3 /

4 inc h 1-1/

2 inches Nomina l siz e range . 

### Maximu m percen t retaine d on (indi

cated ) oversiz e tes t sieve

. Percen t retaine d on (indicated ) tes t sieve

. Maximu m percen t pass

in t (indicated ) undersiz e tes t 

### siev e 3/1 6

t o 3/ 4 inc h
0% (7/ 8 inch ) 5 0 t o 75 % (3/ 8 inch )

2 % (No

. 5 ) 3/

4 t o 1-1/ 2 inches 0% 

### (1-3/ 4 inches ) 25 t o 50 % 

### (1-1/ 4 inches )
2 % (5/ 8 inch )

### concret

e requirement

s pag e 5 Tabl e 2D-Coars e aggregat e gradin g requirements-Continue d 

### Nomina l Maximu m siz e 

### Maximu m percen t passin g th e No

. 20 0 sieve

. 3 /

4 inc h

0.5 % 

### 1-1/

2 inches
0'.2 % 

### f

. Air-entrainin

g admixture-Th e

air-entrainin

g admixtur e shal l confor m t o ANSI/AST

M C 260

. 

### g . Chemica l admixtures-Us e

o f chemica l admixture s shal l confor m t o AST M designation : C 49 4 fo r typ e A
, D

, F
, o r G

. h

. Reinforcin

g bars-Reinforcin

g bar s shal l confor m t o AST M designation : A 615, grad e 60 , includin g supplementar y

requirements

. i

. Curin g compound-Wax-bas e

(typ e 1 ) an d water-emulsified

, resin



### bas e (typ e 2 ) curin g compound shal l confor m t o th e requirement

s o f Wate r an d Power Resources Servic e "Specification s

fo r Concret e Curin g 

### Compound " date d Octobe r 1 , 1980

. 2.1. 3 Compositio n T h e ne t water-cement

rati o o r water-cemen t

plu s pozzola n ratio 

### o f th e concrete , exclusiv e o f wate r absorbe d b y th e aggregates , shal l

no t excee d 0.52 , b y weight

. Th e slum p o f th e concret e whe n place d shal l no t excee d 4 inche s plu s o r minu s 1 inc h fo r al l concrete

. Th e compressiv e strengt h o f th e concret e shal l b e sufficien t t o insur e tha t
eac h concret e mi x meet s th e followin g requirements : a . Ninet y percen t o f tes t cylinder s shal l hav e a compressiv e strengt h at 2 8 days i n excess o f 4,00 0 pound s pe r square inch

. b

. The averag e compressiv e strengt h at 2 8 day s o f an y si x consecutiv e tes t cylinder s shal l excee d 4,00 0 pound s pe r squar e inch

. T h e compressiv e strengt h o f th e concret e wil l b e determine d b y the Governmen t i n accordanc e wit h ANSI/AST

M C 3 1 an d C 3 9 fo r 6

- 

### b y 12-inc h cast cylinders

. Air-entrainin g admixtur e shal l b e use d i n suc h amoun t a s wil l effec t th e entrainmen t o f fro m 4 t o 6 percen t o f air , b y volume
, o f 

### th e concret e as discharge d fro m th e mixer

. Typ e C o r E chemical admixtures
, includin g calciu m chloride
, 

### shal l no t b e used i n concrete

. 2.1. 4 Batchin g an d Mixin g 

### T h e concrete , excludin g wate r an d admixtures
, shal l be proportione d

o n th e basi s o f batc h weights

. Batchin g shal l b e suc h tha t combine d inaccuracies i n feedin g an d measurin g th e material s wil l no t excee d 1-1/ 2 percen t fo r water , cement , an d pozzolan ; 2 percen t fo r sand an d coars e. concret e requirement

s pag e 6 aggregate ; an d 3 percen t o f admixtures

. Th e concret e shal l b e unifor m i n compositio n an d consistency throughou t th e mixe d batch
, an d fro m 

### batc h t o batch
, excep t wher e changes i n compositio n or consistenc y are directed

. Th e mixin g tim e shal l b e sufficien t t o thoroughl y mi x th e 

### concrete , bu t excessiv e overmixin g requirin g th e additio n o f wate r t o 

### preserv e th e require d consistency wil l no t be permitted

. Th e temperatur e o f th e concret e whe n i t i s bein g place d shal l b e no t mor e tha n 90 F an d no t les s tha n 50 F

. Mixer s shal l b e capabl e o f mixin g an d dischargin g concret e o f 

### th e specifie d slump

. Eac h batc h o f concret e delivere d b y truc k mixe r t o th e jobsit e fro m a commercia l batc h plan t shal l be accompanie d b y batching

. 2.1. 5 Forms
, Preparatio n fo r Placing,
, an d Placing 

### Form s shal l b e sufficientl y tigh t t o preven t los s o f morta r fro m the concret e an d shal l b e maintaine d rigidl y i n positio n unti l th e concret e ha s hardene d sufficientl y t o preven t damag e b y for m remova l 

### Th e bulkhea d a t th e downstrea m en d o f th e tunne l plu g shal l be watertigh t an d shal l b e constructe d t o preven t movemen t durin g concret e 

### placement
, simila r t o the detail s show n on drawin g 3

. Preparation s fo r placin g concret e i n th e tunnel plu g shal l be i n accordanc e wit h paragrap h 1.3.1

. 

### T h e method s an d equipmen t use d fo r transportin g concrete , an d th e tim e tha t elapse s durin g transportatio n

shal l be suc h as wil l no t caus e appreciabl e segregatio n

o f concret e ingredient s o r slum p los s i n 

### excess o f 2 inche s i n th e concret e a s i t i s delivere d t o th e work

. Aluminu m pipe s an d chutes shal l no t be used fo r placin g o f concret e o r 

### f o r th e delivery o f pumpe d concrete

. Retemperin g o f concret e wil l no t b e permitted

. An y concret e whic h ha s becom e s o stil l tha t prope r 

### placin g cannot b e assure d shal l not b e used

. Immersion-typ e

vibrator s shal l b e use d t o consolidat e concret e 

### in th e tunne l plug / suc h vibrator s shal l b e arrange d fo r effectiv e unifor m consolidatio n

o f th e concrete

. Immersion-typ e

vibrator s shal l b e operate d a t speed s o f a t leas t 7,00 0 vibration s pe r minut e whe n immerse d i n concrete

. 

### 2.1. 6 Tolerance s fo r Concret e 

### Tolerance s fo r placin g concret e shal l be i n accordanc e wit h th e following :concret

e requirement

s pag e 7 ( 1 ) Variatio n i n lengt h o f th e tunne l plu g fro m tha t show n o n th e drawings...................+1 2 inches 

### 2.1. 7 Reinforcemen t Stee l reinforcin g bar s shal l b e place d wher e show n o n th e 

### drawings

. Befor e bein g placed
, surface s o n reinforcemen t

shal l b e cleane d o f heav y flak y rust , loos e mil l scale,

- dirt
, grease , an d othe r 

### foreig n substances

. Reinforcemen t

shal l be place d t o mee t th e following tolerances : a . The amoun t o f concret e cove r protectin g reinforcemen t

shal l not 

### deviat e fro m tha t specifie d b y mor e tha n 1/ 2 inc h i f th e specifie d

cove r i s mor e tha n 2-1/ 2 inches
, nor b y mor e than 1/ 4 inc h i f th e cove r 

### specifie d i s 2-1/ 2 inche s o r less

. b

. Th e spacin g o f reinforcin g bar s shal l no t deviat e fro m th e 

### require d spacin g b y mor e tha n 1 inch

. Reinforcemen t shal l b e accuratel y place d and secured i n positio n 

### s o tha t i t wil l no t b e displace d durin g th e placin g o f th e concrete

. Unles s otherwis e show n o n th e drawings
, th e reinforcemen t

shal l b e place d so tha t ther e wil l b e a clea r distanc e o f at leas t 1 inc h betwee n th e reinforcemen t

an d anchor bolts
, for m ties , o r othe r embedde d metalwork

.