PROPOSED REMEDIAL ACTION FOR

T HE YAK TUNNEL OPERABLE UNIT

Presented By: Leadville Corporation December 7, 1987

Prepared for publication as

part of the California Gulch Superfund Site Administrative Record
PROPOSED REMEDIAL ACTION FOR T HE YAK TUKNEL OPERABLE UNIT

I . OVERVIEW

The purpose of this document is to provide an outline for

settlement discussion purposes of a proposed remedial action that

Leadville Corporation would undertake with respect to the Yak

Tunnel operable unit of the California Gulch superfund site (the

"Site") . The proposal , as outlined in more detail below,

incorporates remedial options similar to those set forth in

Alternatives 5 and 7 as described in the Yak Tunnel Operable Unit

Feasibilit y Study , California Gulch Site , June 1987 (the "FS") . Furthermore, the proposal is one part of a permanent solution to

the Yak Tunnel discharge and would be a firs t step in effectivel y

mitigating and minimizing the perceived threats to public health

and the environment posed by the Yak Tunnel discharge.

Leadville Corporation, however, must condition the

implementation of the components of this proposal on two

requirements. First . Leadville Corporation requires that prior to

the implementation of the proposal , the U.S . Environmental

Protection Agency (the "EPA") , the U.S . Department of Justice (the

"DOJ") and the State of Colorado (the "State") each approve the

proposal with respect to not only the pending CERCLA litigation ,

b ut also Leadville Corporation' s pending NPDES permit applicatio n

f or the Diamond Shaf t Mine (the "Mine"), if a NPDES permit is

required. Thi s requirement is necessary to prevent the State from

requiring one type of action in connection with the NPDES permit

for the Mine, if necessary, and the EPA and/or DOJ requiring or
taking a differen t action in connection with its final remedial

action for the Yak Tunnel operable unit.

Second, the EPA and DOJ must enter into a settlement

agreement pursuant to Section 122 of the Superfun d Amendments and

Reauthorization Act of 1986 ("SARA"), Pub. L. No. 99-499, which

will be approved administratively or judiciall y and which will

contain a contribution protection provision and a covenant not to

sue Leadville Corporation in connection with the Yak Tunnel

operable unit and the Stray Horse Gulch/Starr Ditch operable unit.

T he next section outlines Leadville Corporation' s involvement

with the Mine and the status of its NPDES permit application for

the Mine. Thi s will be followed by a brief summary of the RI and

FS and of the de minimis nature of Leadville Corporation' s

involvement in the Yak Tunnel operable unit and the Stray Horse

Gulch/Starr Ditch operable unit. A detailed description of the

proposal will follow , including how the proposal incorporates

remedial options similar to those set forth in Alternatives 5 and

7. Finally , this proposal will describe the two conditions that

the EPA, DOJ and State must agree to before Leadville Corporation

will be in a position to undertake the proposal.

I I . LEADVILL E CORPORATION' S INVOLVEMENT WITH TH E MIN E A ND STATU S OF THE NPDES PERMIT

Leadville Corporation acquired the Mine and nearby property

on Jul y 26, 1973 by virtue of a Mining Deed from Robert L. Jones .

The Mining Deed, a copy of which is attached as Exhibit A. was

recorded on August 23, 1973 in Book 400 at Page 102 of the Lake

County records. Mr. Jones acguired the Mine and surrounding

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property from American Smeltin g and Refinin g Company ("ASARCO" )

and Resurrection Mining Company as members of a join t venture

known as Res-ASARCO Join t Venture by virtue of a Minin g Deed,

dated June 8, 1973 and recorded on August 23, 1973 in Book 400 at

Page 97 of the Lake County records, a copy of which is attached as

Exhibit B.

T he head of the Yak Tunnel enters the Leadville Corporation

propert y acquired from Mr. Jones in the vicinity of the Mine.

Leadville Corporation, however, does not own any interest in and

to the Yak Tunnel except for a non-exclusive right to use the

tunnel in connection with its mining operations. In fact , as one

can see from the deeds, the conveyance to Mr. Jones and to

Leadville Corporation expressly excluded the Yak Tunnel . In the

deed from ASARCO and the Resurrection Mining Company to Mr. Jones ,

ASARCO and the Resurrection Mining Company specificall y reserved

ownership of the Yak Tunnel .

It is important to note that Leadville Corporation has never

exercised the non-exclusive right to use the Yak Tunnel in

connection with any of its operations since acquiring the Mine in

1973. From 1973 through 1983 Leadville Corporation did not

undertake any activity with respect to the Mine. Between 1983 and

1986 Leadville Corporation' s activity was limited to exploration.

In 1986 Leadville Corporation began construction to develop the

Mine. Once operational, Leadville Corporation will not exercise

the non-exclusive right to use the Yak Tunnel in connection with

i ts mining operations. In fact , Leadville Corporation can conduct

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all current and future operations at the Mine without the use of

t he Yak Tunnel . In other words, Leadvill e Corporation could

conduct its operations at the Mine even if the Yak Tunnel did not

exist. Therefore, it is clear that Leadville Corporation is not

an owner or operator of the Yak Tunnel .

Leadville Corporation is now in the process of developin g the

Mine and anticipates commencing commercial mining operations in

the firs t quarter of 1988. The Mine will produce approximately

87,500 tons of gold ore per year from the Leadville Dolomite

formation. The Mined Land Reclamation Division issued a Minin g

and Reclamation Permit to Leadville Corporation for the Mine on

December 23, 1986.

In connection with the proposed mining operation, Leadville

Corporation initiall y was of the belief that an NPDES permit was

required for the Mine and it therefore filed an Industrial Waste

Water Discharge Applicatio n (the "Application") , CPDS No. CO0041505, with the Permits and Enforcement Section of the Colorado

Water Quality Control Division (the "Division"). Leadville

Corporation now believes that in connection with the proposed

operation, an NPDES permit is not required because the mining

operation will not result in the discharge of water from a point

source.

Water draining the area of the Mine now leaves the Leadville

Corporation property via the Yak Tunnel . As part of the

Application , Leadville Corporation submitted water sample analyses

for seven Yak Tunnel water samples that had been taken by that

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date. Copies of the individual lab analyses of the seven samples

and a table summarizing the results are attached as Exhibit C.

T he followin g table, Tabl e 1, list s the drinkin g water standards

and the average water quality of the water exiting Leadville

Corporation propert y via the Yak Tunnel based on the seven water

samples.

TABL E 1

Drinking Water Standards Mine Water Average

mg/1 Total mg/1 Total

Cadmium (Cd) 0.01 0.0011

Copper (Cu ) 1.00 0.01914 Lead (Pb ) 0.05 0.0422 Manganese (Mn) 0.05* 0.1871 Mercury (Hg) 0.002 0.0002 Zinc (Zn ) 5.00 0.2560

* Secondary Maximum Containment Level

T he water quality analyses demonstrate that the water leaving

Leadville Corporation propert y by means of the Yak Tunnel meets

t he EPA limits for Drinking Water Standards , except for manganese.

In response to the Application , the Division, in a letter

dated November 7, 1986, a copy of which is attached as Exhibit D.

stated that the discharge point from Leadville Corporation

property was the Yak Tunnel Portal and not the point in the tunnel

the water lef t Leadville Corporation property at the head of the

Y ak Tunnel . The boundary of the Leadville Corporation property is

approximatel y three miles from the Yak Tunnel Portal . As a

result, the Division stated that as a condition for receiving the

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NPDES Permit Leadville Corporation would have to isolate flow s

from its propert y to the portal or collect a similar volume of

water at the portal and treat it to proper effluen t limitations .

As an alternative, the Division suggested pluggin g the Yak Tunnel

at a suitable location on Leadville Corporation property, pumpin g

the water to the surface, treating the water to applicabl e

effluen t limitation s and dischargin g the effluen t into Big Evans

Gulch. Big Evans Gulch is a drinking water suppl y for Parkville

Water District. That District provides drinking water to the Town

of Leadville . In its letter, the Division noted that based on

existin g data the quality of the water leaving Leadvill e

Corporation propert y is "fairl y close to meeting standards for Big

Evans Gulch." See Exhibit E.

Thi s statement is supported by the results of water samples

authorized by Leadvill e Corporation of Big Evans Gulch. During

1987, six samples were taken from the receiving waters upstream of

the proposed discharge point and from water draining the existing

workings at the Mine and one sample was taken from the Elkhorn

Shaf t discharge, copies of the individual lab analyses of the

samples are attached as Exhibit F. In addition , a table of the

six Big Evans Gulch water sample results is attached as Exhibit G.

As one can see from the sample results, event without treatment,

the Mine drainage water quality meets most stream segment

standards and is comparable to ambient water quality in Big Evans

Gulch.

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Based on the November 7, 1986 letter from the Division and

subsequent telephone conversations with Division representatives ,

the best solution with respect to the NPDES Permit is to plug the

Y ak Tunnel , pump the water to the surface, treat the water and

discharge it into Big Evans Gulch. Leadvill e Corporatio n is

willin g to implement the plug and pump solution to the NPDES

Permit matter as long as it is acceptable to the EPA and DOJ with

respect to its final remedial action for the Yak Tunnel operable

unit.

III . SUMMAR Y OF THE R I AND F S

As noted in the Phase I, Remedial Investigation Report,

California Gulch, Leadville , Colorado, May 1987 (the "RI") , the

Y ak Tunnel contributes 80% of the dissolved zinc, 85% of the

dissolved cadmium and 76% of the manganese that leaves the

California Gulch site and enters the Arkansas River. In fact , the

water discharged from the Yak Tunnel Portal contains

concentrations of Cd, Zn, Pb and Mn that are in excess of EPA

Drinking Water Standards .

To remedy the problem at the Yak Tunnel operable unit, the

EPA in its FS reviewed ten alternatives and the no action

alternative. Two viable alternatives remained after the initial

screening process: (1) Alternative 5—collectio n and treatment of

t he Yak Tunnel acid drainage with discharge of the treated

effluent ; an d (2) Alternative 7—installatio n of a concrete

plug(s ) in the Yak Tunnel (partial plugging ) to reduce the portal

flow , with subsequent collectio n and treatment of the remaining

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acid drainage prior to discharge. EPA determined that Alternative

7 would cost less than Alternative 5 because the partial pluggin g

would reduce the volume and metal loads of portal flo w and,

consequently, require a smaller treatment plant .

Section 121(d ) of SARA requires that the selected remedial

action attain a degree of clean up which, at a minimum, assures

protection of human health in the environment. As noted in the

F S, protectio n of human health can be accomplished by obtaining or

exceeding criteria established under the Saf e Drinking Water Act:

Maximum containment levels and proposed maximum containment level

goals. Furthermore, protection of the aquatic environment can be

accomplished by obtaining or exceeding ambient water qualit y

criteria from the Clean Water Act. These criteria are shown on

Tabl e 2 of the FS, at page ix. Presumably, Alternatives 5 and 7

would meet these standards.

I V . LEADVILL E CORPORATION I S AT MOST A D E MINIMI S CONTRIBUTO R WITH RESPECT T O TH E YAK TUNNE L OPERABLE UNI T AN D

T H E STRA Y HORSE GULCH/STAR R DITCH OPERABLE UNI T

A. Yak Tunnel Operable Unit .

Accordin g to the Water Qualit y Modelin g Study , Yak Drainage

Tunnel , dated December 1, 1986, prepared by Hydro-Search,

Inc. (the "HSI Study") , a copy of which has been previously

submitted by Leadville Corporation to EPA and is included in the

bibliograph y to the R.I. , the flo w from the propert y owned by

Leadville Corporation into the Yak Tunnel represents only 20-25%

of the total Yak Tunnel discharge at the portal . HSI page 1.

According to the HSI Study , the water quality of the unplugged,

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untreated discharge from the Yak Tunnel is set forth in Tabl e 2

below.* HSI page 6.

TABL E 2

mq/1

Cadmium 0.46

Copper 2.28

Lead 0.14

Manganese 26.20 Mercury - Zin c 94.25

As noted in Tabl e 1, the average water quality of the Yak

Tunnel water leaving the propert y owned by Leadvill e Corporation

meets the applicabl e drinking water standards for Cd, Cu, Pb, Hg

and Zn. Only the concentration for Mn exceeds the EPA recommended

goal for drinking water quality. See 40 C.F.R . § 143.3 (1986) -

Secondary Maximum Contaminant Levels.

T he Code of Federal Regulations specificall y provides that

each state may establish higher or lower levels for Mn that may be

appropriate in light of local conditions or other factors . Id.

T he Stat e does not appear to have a drinking water standard for

M n. See 5 C.C.R . § 1003-1, Article 5.1.1(1) . Furthermore, the

Jun e 1985 editio n of EPA document 540/G-85/003, Guidance on

Feasibilit y Studie s under CERCLA , does not include an ambient

standard for Mn. See Tabl e 5-2 EPA Ambient Standards and Criteria

f or Superfun d Remedial Sites . Leadvill e Corporation , however,

* The HSI Stud y adopt s the Engineering-Science water quality data

f or the Yak Tunnel Portal . The Engineering-Science samples were

taken during the same general time period in 1986 as the seven

Leadvill e Corporatio n samples referred to above.

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does not anticipate any problems in meeting the applicabl e NPDES

effluen t limitatio n for total an d dissolved manganese.

With respect to aquatic life , it does not appear that the

concentrations of Mn in the water contributed to the Yak Tunnel

flo w by the Mine represents a danger to aquatic life . Accordin g

to the U.S . Department of the Interior, Bureau of Reclamation

document REC-ERC-81-15, Heav y Metal s Pollutio n of the Upper

Arkansas River. Colorado, and Its Effect s on the Distributio n of

Aquatic Macrofauna. September 1981 ("Heav y Metal s Study") , Mn is

usuall y present in surface water in concentrations in excess of

1.0 mg/1 and Mn in that concentration is not toxic to trout.

Heavy Metal s Stud y page 12. The publicatio n recommends that Mn

should not be present in cold surface waters in excess of 1.0 mg/1

to protect aquatic life . Id. The Mn levels in the water leaving

Leadville Corporatio n propert y that would be plugged and pumped to

t he surface by Leadvill e Corporation average less than one-fifth

of the recommended level. The publicatio n also suggests that Mn

actuall y can be antagonistic to the toxic effect s of other heavy

metals. Id.

Finally , based on the Leadvill e Corporation sample data and

t he HSI Study , it appears that the Mn contributed by the water

exitin g the Leadville Corporatio n propert y via the Yak Tunnel

represents only 0.7% of the Mn concentration at the Yak Tunnel

Portal . In fact , the HSI Stud y concluded that the loss of the

clean water draining from the Mine into the Yak Tunnel would

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result in further increasing the metal concentrations at the Yak

Tunnel Portal . HSI page 2.

In additio n to the current water quality samples and recent

studies , historic data in the records of Leadvill e Corporatio n

concerning the Mine demonstrate that mine water was pumped to the

surface and used for domestic purposes and after use, the water

was discharged to Big Evans Gulch. Specifically , the water was

used for compressor coolant, change room showers and drinking

water purposes. The historic data does not indicate any adverse

effect s to man or machines as a result of using the water pumped

from the Mine to the surface.

Given al l the facts , Leadvill e Corporation clearl y satisfie s

t he requirements of Sectio n 122(g)(l)(A) because the amount of

hazardous substances and the toxic or other hazardous effect s of

t he substances flowin g into the Yak Tunnel system from the Mine is

at the most de minimis in comparison to other hazardous substances

in the discharge at the Yak Tunnel Portal . In fact , there has

been and is no release and there has been and is no threatened

release of any hazardous substance, pollutan t or contaminant from

the propert y owned by Leadvill e Corporation. Consequently ,

Leadville Corporation is clearl y eligible to enter into a

settlement agreement with the EPA and DOJ pursuant to Sectio n

122(g ) o f SARA .

B. Stra y Horse Gulch/Star r Ditch Operable Unit .

In a letter, dated Jun e 3, 1987, the EPA asserted that

Leadvill e Corporatio n is an owner and/or operator of the waste

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dumps and tailings pile s in Stra y Horse Gulch that contribute to

the release of hazardous substances into the environment. In that

letter, EPA stated that "EPA has reason to believe . . .

[Leadvill e Corporation ] is a current and/or past owner or operator

of a facilit y from which this release or threatened release is

occurring or may occur within the meaning of Sectio n 107 of

CERCLA , 42 U.S.C . § 9607." Thi s reference to the facilit y was a

direct reference to Stra y Horse Gulch and Starr Ditch.

In response to that letter, Leadvill e Corporatio n sent EPA a

letter, dated Jun e 15, 1987, in which it denied that it was ever

the owner or operator of any facilit y in or near either Stra y

Horse Gulch or Starr Ditch areas. Thi s statement was made based

on conversations with Leadvill e Corporatio n officer s and

employees. These officer s and employees did not know and did not

believe that Leadvill e Corporation had ever had any involvement in

t he Stra y Horse Gulch or Starr Ditch areas.

In connection with the current litigation , a review of

historical documents maintained by Leadvill e Corporation was

undertaken. As a result of the review, it has come to our

attention that during 1971 Leadvill e Corporatio n had an agreement

with Morrie Biggs , lessee of the Robert Emmett Mine, which was

owned by ASARCO, to conduct an underground exploratio n program.

At the end of the exploratio n program, the operation was abandoned

and the site reclaimed pursuant to the then existin g requirements.

Leadvill e Corporation , however, does not have a copy of the

agreement. The informatio n concerning this exploratio n program

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w as obtained from the company' s annual report and a memo from D.W . Bloom of Earth Sciences , Inc . to Dr. R.G . Risk, President of

Leadvill e Corporation .

It should be noted that during this exploration period, there

was no release or threatened release of any hazardous substance,

pollutan t or contaminant caused by Leadvill e Corporation.

Consequently , Leadvill e Corporation again satisfie s the

requirements of Sectio n 122(g)(l)(A) because it s involvement i n

the Stra y Horse Gulch/Star r Ditch area is at most de minimis.

Leadvill e Corporatio n therefore is eligibl e to enter into a

settlement agreement with the EPA and DOJ concerning the Stra y

Horse Gulch/Star r Ditch area. Therefore , Leadvill e Corporatio n is

willin g to implement its proposed plug and pump remedial action on

the condition that EPA and DOJ enter into a settlement agreement

with Leadvill e Corporation . The requirements of the settlement

agreement are discussed in Sectio n VI.

V . TH E PROPOSED REMEDIA L ACTION

A. New Year Seal of the Yak Tunnel .

As noted above, Leadvill e Corporation' s proposal incorporates

concepts that are comparable with Alternatives 5 and 7.

Specifically , Alternative 7, which is the partial pluggin g

proposal , call s for placin g the Ibex plug in the vicinity of the

Westo n Faul t Zone to reduce the volume of water exiting the Yak

Tunnel Portal . The Leadvill e Corporatio n proposal call s for

placin g a high pressure concrete seal or plug in the Yak Tunnel on

t he New Year Lode Minin g Claim MS 496, which is propert y owned by

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Leadville Corporation . Although the Leadvill e Corporatio n

proposal involves placin g the seal closer to the head of the Yak

Tunnel than Alternate 7, it appears that the differen t locatio n

wil l not greatl y impact the volume of water exitin g the Yak Tunnel

Portal . The plug wil l prohibit water currently drainin g from

Leadvill e Corporation' s Diamond-Resurrection propert y from

reaching the Yak Tunnel Portal . In addition , a second plug could

be placed at the Ibex location if the volume of water at the

portal is not reduced to the desired level by the firs t plug. In

a ny event, Leadvill e Corporation' s proposal achieves one of the

remedial goals established by the EPA in the FS: Reducing the

volume of water that is discharged at the Yak Tunnel Portal .

T he seal will be located approximatel y 3700 feet from the

terminus of the Yak Tunnel and wil l be placed in pre-cambrian

granite. (Exhibi t H contains a map showing the specifi c location

of the proposed seal. ) The specifi c locatio n wil l be determined

followin g detailed geologic mappin g to ensure a location that wil l

achieve the desired purpose of containing the Mine' s water flo w

and, should the EPA agree to institute ASARCO' s Yak Tunnel

pluggin g proposal , to protect the Mine' s natural resource area

from inflow s of potentiall y acid-mine drainage. The detailed

geologic mappin g also wil l include determining the locatio n of the

seal relative to both local and major structural systems.

T he seal' s design i s i n accordance with current U.S . Bureau

of Reclamation design data. (Exhibi t I contains drawings that

show specifi c desig n features for the seal. ) The seal wil l be a

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cast in place concrete plug having a weight capable of

withstandin g a pressure of 1700 fee t of water head maximum.

(Exhibi t I contains a summary of the general concrete

characteristics and requirements.) The locatio n of the seal wil l

be pressure grouted to withstand a comparable pressure for a

minimum of 20 feet into the surrounding granite. (Exhibi t I

summarizes the grout detail. )

T he anticipated design and construction period is twelve

weeks. The followin g is a summary of the individual construction

phases:

Engineerin g - Thi s phase involves undertaking specifi c

locatio n analysi s and detail design of the seal, grout

curtain and construction specifics . Thi s phase includes

a two week period to obtain governmental approval of the

seal location and design. Thi s phase is anticipated to

take six weeks to complete.

Purchasing - The purchasing phase wil l consist of

obtaining required materials , assuring deliverabilit y of

materials and the lettin g of construction contracts, if

required. Thi s phase is anticipated to take three weeks

to complete.

Mobilizatio n - The mobilizatio n phase involves

mobilizin g the required personnel and equipment to allo w

f or the placement of the plug. Thi s phase should be

completed within five working days.

Level Rehabilitatio n - Level rehabilitatio n will consist

of work required to ensure access along the course of

t he Yak Tunnel from the proposed Ella B Shaf t to the

seal location and will include communications, rock fal l

removal, ground control , as required, and the

installatio n of necessary construction services. It is

anticipated that this work wil l be completed within five

working days of three shift s each.

Dril l Hol e - To ensure timel y placement of concrete, it

is proposed that a six to eight inch dril l hole be

placed from the surface to a location immediatel y above

the seal. Thi s hole will allow for concrete to be

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pumped down to the Yak Tunnel for placement into the

seal. A second hole may be drilled for construction

services in lieu of placement from the access shaf t to

the seal location. Approximatel y two weeks of multipleshif t work wil l be required for this construction phase.

6. Ring Dril l - Thi s phase involves the drillin g of grout

curtain holes into the surrounding rock at the seal

location to allo w placement of the required grout

curtain. The ring dril l phase is anticipated to take

approximatel y four days of multiple-shif t work.

7. Bulkhead - Timber bulkheads wil l be constructed at the

seal location to contain the cement to form the physical

seal. It is anticipated that three days of multipl e

shif t work wil l be required.

8. Placement of Cement - Thi s phase is the pumping of

cement to the proposed seal location. Five working days

of multiple-shif t work is anticipated to complete the

physical seal itself .

9. Grout - Followin g an anticipated 28 day curing period,

high pressure grout wil l be placed via the previousl y

drilled holes to form a curtain around the seal. Five

working days of multiple-shif t work is anticipated for

this phase.

10. Demobilizatio n - Demobilizatio n will consist of removal

of equipment, salvageable material and services to the

surface. Reclamation of surface disturbances caused by

bore hole construction and cement pours. Thi s phase

should be accomplished within five working days.

B. Water Treatment .

As the mining facilitie s and associated workings are not yet

developed, it is not possible to determine the precise flo w of

water through the area; however, a conceptual line drawing is

attached as Exhibit J. For this reason, Leadvill e Corporation' s

proposed treatment system is designed with generous reserve

capacity. It is currently anticipated that the mine shaft s and

workings wil l be the primary sources of water. The water likel y

wil l be gathered via flume s located in the drift s and shafts .

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Thi s flo w wil l be collected in sumps, pre-treated and pumped to

t he surface for final treatment before discharge into Big Evans

Gulch. Because control of total suspended solids is the key to

meeting the projected permit limitation s for the effluen t from the

Mine , the water treatment wil l consist of settlin g ponds with the

possible use of flocculation . Please refer to Exhibit E for the

proposed water qualit y after treatment based on an actual physical

sample with low TSS. Afte r treatment, the water collected within

the mine workings wil l not degrade the existing water qualit y of

Big Evans Gulch or impair any existin g use of the water.

1. Treatmen t Technologies .

Water collected in the tunnel as a result of the pluggin g

wil l be pumped to the surface for treatment and discharge into Big

Evans Gulch. Prior to being pumped to the surface, the collectio n

sumps located in the mine workings will pre-treat the flo w by

allowin g the bulk of suspended solids to settle-out. Treatment

also may include the possible additio n of lime in the underground

sumps to precipitate any suspended solids in solution.

T he treated water will then be pumped to the surface via the

Ella B Shaf t to the treatment facilit y located on the surface.

Retention time in the surface settlin g pond wil l be a minimum of

four hours and maximum of sixteen hours with the anticipated flow s

and is sufficien t to achieve discharge parameters using the

proposed system. Ultimat e disposal of any solid waste generated

wil l occur at the Stringtow n Mill , a metal concentration plant .

T he metal s in the solid waste wil l be extracted and the residue

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wil l then be placed in a zero discharge, permitted tailings pond.

T he surface settlin g pond and associated equipment will be

enclosed within an all-weather structure to maintain treatment

efficienc y despite the harsh climatic condition s foun d at the

site. The design of surface facilitie s are contained in

Exhibit K.

The treatment system would operate year round as long as the

Mine is in production. Once operations at the Mine are

terminated, mine water would be disposed of in accordance with the

Minin g and Reclamation Permit issued by the Mined Land Reclamation

Division, which is to stop pumping the water to the surface and

let the Mine flood. Based on the data reviewed to date (see

Exhibit L) and field observations made by Leadvill e Corporation of

the Paleozoic rocks in the Mine, it is probable that water would

not back up behind the plug to a significan t depth. Instead, it

would most likel y migrate to the northeast alon g integrated karst

cave systems, fault s and fractures becoming part of the natural

ground water system northeast of the Site .

2. Intermitten t or Seasonal Discharges.

Historically , underground mines in the Leadville Mining

District have encountered occasional inflow s of water that are

significan t initially , but rapidl y decrease in volume. Due to

this possibility , common mining practice is to have dril l holes

located in advance of working faces to drain these areas to

prevent high inflow s from occurring.

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Leadville Corporation believes that it can prevent and

control the potential surges through the use of the proven

methodology described above. Also , the underground sumps will

have sufficien t capacity to act as a buffe r should increased flo w

rates from the workings occur. By controllin g flo w variations,

surge effect s wil l be minimized and should not exceed the expected

maximum of 450 gallon s per minute by more than ten percent. In

this way, the volume of water pumped to the surface treatment

facilit y wil l always be within design limits .

3. Process Operation s Plan . Mine water will be pre-treated before being pumped from

underground collectio n sumps to the surface treatment facility .

Sump influen t pH will be monitored and adjusted to a pH of 9 to

10.5 by the additio n of lime. The lime feed system will be

comprised of storage hopper, mixing tank, pump and a control

device. The majorit y of settlin g and flocculatio n is expected to

occur underground thereby reducing pump wear and the amount of

sludge requiring off-sit e disposal . On the surface, additional pH

monitoring wil l assure that optimum pH level s for treatment are

maintained without exceeding the permit limitation . Process

equipment wil l be checked periodicall y for proper functio n and a

preventive maintenance program employed. Sludge wil l be removed

and transported by a vac-truck on an as-needed basis to the

Leadvill e Corporatio n Stringtow n Mil l for processing an d final

disposal . Periodic testing of the effluen t will be conducted to

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ensure that water qualit y standards are met. The test result s

wil l guide any necessary adjustment s to the process.

T he construction of a sedimentation basin and the treatment

of the water with chemical flocculants , if necessary, also

incorporates remedial option s set forth in Alternatives 5 and 7.

Specifically , Alternative s 5 and 7 call for the collection ,

treatment and discharge of Yak Tunnel water. The proposal call s

f or collection , treatment and discharge of ground water that would

otherwise flo w into and through the Yak Tunnel . As a result,

another remedial goal of the EPA is achieved.

V I . CONDITION S OF IMPLEMENTIN G TH E PROPOSAL

As noted above, Leadvill e Corporatio n will implement the

proposal as long as two conditions are satisfied.

T he firs t condition is that the EPA , DOJ and the Stat e

approve the proposal . Leadvill e Corporation is making this

requirement because if an NPDES permit is required for the Mine

the Division has indicated that the best solution appears to be

t he pluggin g the Yak Tunnel , pumpin g the water to the surface,

treatin g the water and dischargin g it into Big Evans Gulch. The

Division' s solution, however, is not one of the Alternatives

specificall y set forth in the FS. Consequently, this condition is

necessary because Leadville Corporation does not want to implement

the Big Evans Gulch plug and pump solution if, in six months, the

E PA in selectin g its final remedial action requires Leadvill e

Corporatio n to "unplug" the Yak Tunnel . It wil l be extremely

costl y to plug the Yak Tunnel , purchase pumps and materials and

-20-
construct the proposal . It would be foolish for Leadvill e

Corporation to implement the alternative to satisf y the NPDES

permit requirement only to have the EPA and DOJ require Leadville

Corporation to remove the plug in order to implement a remedial

action. The estimated cost of the plug and pump alternative is

$300,000.00 with an estimated $75,000.00 per year operatin g cost.

T he second condition Leadville requires is that the EPA and

D OJ enter into a settlemen t agreement pursuant to Sectio n 122 of

SARA. The settlement agreement must contain a covenant not to sue

pursuant to Section 122(g)(2 ) of SARA, which covers any liabilit y

to the United State s under CERCLA and SARA, including future

liability , resulting from a release or threatened release of a

hazardous substance addressed by remedial action, whether the

action is on-site or off-site . The settlement agreement also must

contain a contribution protection provision pursuant to Sectio n

122(g)(5 ) of SARA. Leadvill e Corporation believes that the

settlement agreement is in the public interest and would expedite

a response action consistent with the National Contingency Plan

under Sectio n 105. Furthermore, such an agreement would promote

EPA's goal of settlin g with de minimis parties in order to make

negotiations and litigatio n more manageable. Finally , a

settlement agreement would allow Leadville Corporation to expend

its financial resources in remediating a portion of the perceived

environmental problem at the Yak Tunnel Portal operable unit

instead of payin g legal fees and transaction costs of litigatin g

with the government.

-21-
VII . CONCLUSIO N

Leadville Corporation is presentin g this proposal in order to

implemen t the goal of CERCLA , which is to expedite response

actions by potentiall y responsible parties. Leadvill e Corporatio n

would be happ y to meet with the EPA, DOJ and the Stat e at any time

to review the proposal and to discuss any questions the EPA , DOJ

or Stat e may have with respect to the proposal . Thi s proposal is

being submitted in an effor t to stimulate settlement discussions

with respect to potential liabilit y of Leadvill e Corporation for

Upper California Gulch an d Stra y Horse Gulch/Star r Ditch. It i s

not and should not be deemed as an admission of liabilit y for any

aspect of the Sit e as described in all applicabl e pleadings .

-22-
EXHIBIT A
Poor Quality Source Document

T he followin g document images

have been scanned from the best

available source copy.

To view the actual hard copy, contact the

Superfun d Records Center at 303-312-6473
/\

,..... .

«*";Fil*d..for* record August 23, 1973 .2:30 P.M.

•v Rec .No^S.6436- Terrence S. Connors Recorder

i :>k 400 102

ANni;~,ncT •• » : V .,..,.. S •

•: 31SV:

MININ G DEED*-**- ••*JA4 I .»•'«•

THIS MINING DEED, made this 26th clay of Jul y

;

'^-

;

 1973,-:* etween ROBERT L. JONES, of 4630 Vance Street , Lakewood,

''•: : 'Colorado , 80215, th e Grantor, an d LEADVILLr , CORPORATION , a

Colorado corporation, of P.O. Box 960, Leadville , Colorado,

-•^'80461 , the Grantee.

S E T H :;.-;

consideration of $35,000 and other

•"•r^-. valuable considerations to him in hand paid by Grantee, the

• ''•"" receipt of which is hereby acknowledged, does hereby sell and

of Colorado, to wit:

r.t£^described on.Exhibit ^ attached, ; .V,;.

-•-**'———.—'~~—~»-~-i Sy . reference^-.subject •;•»••-•«•.".;.»'. .

ns^reservati6ri ifbf' royalty'i - ind/'-^v^^^^':'^

' ' attached to;

and "tnterests excluded :-by" American

Cpmp.iny. and Resurrection Mining Company as

^"Vn^". f

venturire'fenown e - as Res-Asarcd._Joint Venture;.;^ :

'drainag e and transportatio n tunnel ' /:

 "" " " ••^•'•'•'- . '..;"..-: •''- ' y^'

:

:-'. ',' • -f ;-'..

.Tories,;.the Grantor under this instru-;

i;ifig'^" :Seiltn g an d co'nveyingj nevertheless ..';

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

:

.--

;

^

:

. • :hii5r

 instrument all rights, .title arid ;, ,

,..^>.......tW-AV......... ..jrfeVty - Jones under the; terms of Jthe^^;;^^,

^jf§r.rc^t^. : V a'p'iiy'ie^V^^;.:-^'>;';.;^ ;;

:

-:—.
.Book 400 Paqe 103 \

-2-

2. lixcepuin g all tight , ttl.l c and interest exceptcd

and reserved in favor of American Smeltin g and Refinin g Compan y

and Resurrection Mining Company as members of a join t venture

known as Res-Asarco Join t Venture, and in favor of all the

lands owned by them, in the form of a right of way excepted and

reserved under the terras of the Mining Deed referred to above,

from Res-Asarco Join t Venture to Robert L. Jones as Grantee; and

3. Subjec t to the covenants running v;ith the land

set forth in the Mining Deed between Res-Asarco Joint Venture

and Robert L. Jones , as Grantee, referred to above.

 :

 , . .

T O HAV E AN D T O HOL D th e ^arae unto th e Grantee, it s '..;,.-

successors, legal reprer.cnLaLiven , and assigns, forever. .-•••"

Grantor does not warrant the titlu co the properties conveyed

hereby and this instrument shall be considered as

:

 a Bargain aud ;

Sale Deed in accordance with §118-1-15, Colorado Revised Statuccs , ...

- IN WITNESS^ WHEREOF,: the parties heretoJiaye execute,!

this Deed effective the date firs t above

STATE OF COLORADO..

" - •»- • ; '•'," '. • . CITY AND COUNTY OF DENVER

T he foregoing instrument

c?/sr day b&*/9''if£t/f r

Witnes s my hand and official

;.:. Notary
-3-

-

 >":::VJ>

 . --ooJ^: ,400-^raere:.-. .104

. ,.. -.; -.;. • ••: • . ••#,:;;-#.•• • • **&->^

'"'•'• '•"''• / ; > 1 ?'''^.%-'i-.v^C5,«';:^-'"

STATE OF COLORADO

CITY AND COUNTY OF DENVER.

)

)

)

ss.

:; • • :- " .''•'••'?* tfifr?:***^. 'v':?

r

:>.: , ;

 r •*-.. -*- ..- .? * . • " " • " "•'.• -'••-.••'-."*•;. -v*r -*f: ^ ..•

• ' • ' " •'• ; .

: ;'''-v ^^-T-v.r • The foregoing instrument was acknowledged befhre me

ay of */•/***?;. • 1973. by ZtrJJL^ p. •;•/ v •-

as of Leadville .. ; Corporation.

,..- Witnes s my hand an d officia l seal. . r ..-'=. -

..-•""! -

:

 ..') Sl^- '-.'••" : - V ;V'-'^" ; .'•

, fk,

liotaj/ y Public

My commission expires

. • . : . . -v;-- ':•-"•:•' • '•;,-. • ' . . • 1^:' - J: ^ '. •f';fx..'• • ;=£-•'..-..., ; vj^p^^a^;^.'^^K^^k'.'.'^V

«is^^i VKi . *X :>-^S?.^Sf&;'S
HooH 400

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^ ~- — - **

 '

.;fe^£-----?tery

* *•"** 1 to 15/

 inc*u

<-.*• ,

^i /. *. J

.-370

7141

SiSife^^Pvv

•S?^^/^--*^ /"•• • .

. • =• '.. '••!* — • . ' . £•$.;?•;?••- •;.-. v; '.:

;

-^-*,^.- r.i^ /- :: • ••= . • -
Book <JOO Pdao

RESERVING unto Grantor the following:

1. Royalty . Grantor reserves and Grantee agrees

to pay to Grantor a productio n ro, ..'.•„y ..- ;ol to 47, of thu net

smelter and mint returns or tuc ncL rail! returns from all ore

produced from the real propert y Oc.scribed on Exhibit A (the

"Jones Claims").

T he "net smelter returns" upon which royalties shal l

be payable as hereinabove provided, shall mean the amount of

the actual payments received fro m the smelter to which ore or

concentrates are delivered, after deductin g ;ill smeltin g

: charges and all, costs of transportin g such ore or concentrates

to said smelter from the Jone s Clai.-....». "Net sudter returns"

shall include net mint returns, aiul the latter is defined as

above set forth with "mint" substituted for "smelter." If

t he smelter to v.'.iich ores or concentrates from the Jones Claims

are sent for pri-'.-ossin g is owned by the Grantee, smeltin g

charges shall be generally consistent with indu-. u-j y charges

by other smelterj processing similar ore or concentrates, but

the royalty interest shall not bear the costs normally associated

with milling for the purpose of producing concentrates for sale

to a smelter.

The "net mill returns" upon which royalties shall be

payable as hereinabove provided, shal^mean the amount of the

actual payments received from the custom mill or other buyer

• ;.';

:

 tp-which said ores, concentrates or cementates are delivered,

-1 -

' i f said ores ar e sold t o a mill , afte r deductin g al l cost s o f

i

transportin g such ore to said custom mill from the demised

• premises.
!<ook 400 Page 1O7

In the evi^n-: any promi-im i^ual pnyn r.ts or government subsidies ore paid on nay ore r.iined fro m the demised

premises, then unless prohibited or limited by low or government regulation:-, Grantee shal l pay to Grantor as royalt y a

percentage of such premium metal paymen t or government subsidy

equal to the ro>\ili.y percentage applie d upon the net mill c^

smelter return' - ouca ore us speci f Led and determivied above.

If any dispute- should arise between :.:./ partie s in

interest over the computatio n of the royalty , it shal l be

referred to binding arbitration under tha rules of the American

Arbitratio n Association .

Grantee? shall pay Grantor .;u annual advance royalt y

of $1,000 upon execution and deliver , of this d-jed , $2,000 on •

the firs t anniversary date of this died and $3,000 on each of

the second through the ninth anniversary datec of this deed.

Each such advance royalty payment afte r the firs t such payment .

shall be reduced by the total amount of production royalties

 :

.

paid during the preceding year. No advance royalty shall be

payable after the ninth anniversary date of this deed.

Gra.-:-"^ may credit such advance royalty payments against pro

j

duction royalties x*hich become due and payable hereunder," to

t he r-tent of one-half of each production royalty payment. { V K'.:.'.•

Payment of royalties shal l be made by Grantee to W;;X:^-;:i-;^-

. '

 :"- '"•'yi'~£ci&z~ Grantor within thirty days afte r the end of Lhe calendar month :

^.-;

in which Grantee receives payment for the ore. Failure to pay /£•;''(£

a ny such specified advance royalty when due shall create a .-'•,;;.'•'•**'•%£*.

-.lien for the security of the unpaid amount encumbering the

 ;

;^v v

;

! s'%'.;';

:-'

:Jones Claims and subordinate only to ;u-.y lien

held

such

by or through Lloyd L. Morain. Upon payment^of all' J :i;^,

:

.Xf

 - --^1. *'•*, : - «•", ' • ^'-'l:•.^V- 1^-"• ' • • • . i v.. ..)•-'.-"'"i'-j-^i •'<';•-' -.j{

advance royalt y payments , Grantor shall execute and ^^^^s?: , •

 - *

-2-
Book 400 Paqo 100

deliver to .Grantee a suitable release or this lien iu recordable form.

The mineral content of all ore raineu _.d ;.c,uoved

from the premises shall be determined by Grantee or by the

purchaser of the ore or concentrate, in accordance with standard sampling and analysis procedures. Upon request to Grantee,

and at Grantor' s excise, Grantor shall have the right to have

a representative present at the time supple s arc taken.

A ll residue or tailings remaining afLui.- the initial

processing or milling of ore mined f j.<..•.-. the Jones Claims shall

be the sole and exclusive propert y of Grantee.

• In the ever... Grantor owns a lesser mineral interest

in the Jones Claims than the entire and undivided fee simple

estate therein, then the royalties herein provided for shall

r:-^.: ' . te; paid to Grantor only in the proportio n that Grantor' s

\

:

'•".'=>,-. -, mineral interest bears to the whole and undivided mineral

*•;. Grantee may terminate the royalty interest herein

&^^r^ reserved at any time on or before twenty years after the death

^?^-.'i;>v of the last survivor of the present parties of the law firm

4^'C-:,;;v

:

-; of .Dayis-i Graham & StubLs of Denver, Colorado by paying Grantor

K\.-.-siVr'-V-'the sum of $200,000 exclusive of previous royalty payments .':;'••

!*£•.'&.''i.:.'l.paid to Grantor.- Upon receipt of such payment, Grantor shall

Irf^V^quitclai m to Grantee.all of its right, title and interest in

* the Jones Claims.

right to lease tailing;. If, at
400 Page 109

notif y Grantor of such determination and of thu proposed lease

terras. Grantor shall have 20 days after the effective s date of

such notice within which to notif y Grantee that it wishes to

lease the tailings on the same terms. If Grantor so notifie s

Grantee, then Grantor and Grantee shall promptl y execute the

lease. If Grantor does not so notif y Grantee, then for a period

of six months followin g the enectivc date of Grantee' s notice

to Grantor, Grantee may lease the tailings on die Jone s

to any third part y .for mining purposes on the terms c.

in the notice, modified in any ica^ouable way that is more

favorable to Grantee' , freo -,,: this preferential right to lease.

3. Notice . Any notice required or permitted *-o be

given hereunder shall be deemed properl y given upon personal

delivery of a copy of the notice to the part y to-whom it is

i

directed, or by depositin g a cop y of the notice in the United

States mail, sent by registered or certified mail, return .

receipt requested, addressed to the party to whom the notice

is directed as shown on page one of this deed or as-determined

by paragraph three of this Schedule R, or to such other person

or address as the part y to be notified may have designated

prior thereto by written notice to the other party .

 :

 Any notice

so mailed shall be effective upon mailing. ".

4. All covenants of Grantee contained herein are

covenants running with the Jones Claims and shall bind Grantees' s

successors in title thereto. Grantee and any successors in

title to the Jones Claims shall only be bound to perform the

covenants to the extent of their interest in the Jones Claims.v> * - v "* • f>•'•"•••"•:. TV-'*. ••-••?.-, . \-:.-;iis$i;

^^&::W':^^^^ •';-;'"•' ' • • : v '

: '.'-. s ;•' —•:•''•' • '.••--.vK'. .'• : ^iS-^'f'' ^

 :t"•;; I '':.;&&'• • • '^S^ft^ S$l^fl f

"• :•:•;• ;>

:

- !>;--

:

.

:>

 ^'^ff"'''^^^m
xl.$or record August 23, 1973 2:30 P.M. Mo-256435, Terrence S. ' £b

• Connors ^F Recorder

Book 400 Paqe 97

MININ G DEED

THIS MINING DEED, riade this sth da y of June

1973, between American Sneltin g and Refinin g Company and

Resurrection Minin g Coir.;/..my as members of a join t venture

i. as Res-Asarco Join t Venture, the Grantors, and Robert

i s, of 4630 Vanco .Street , Lakewood, Colorado, the Grantee,

 ^ . .'• - W I T : J E' S S E T H : "

..'': . Th e GRANTORS , i n • - .u;ideration o f $35,000.00 t o them i n

hand paid .by GRANTEE, tho receipt of which is hereby acknowledged, do hereby sell and convey unto the GRANTEE the follow -

ing described real estate and mining propert y situated in the

; California.Minin g District , County of Lake, State of Colorado,

. to-wit: :-' • . :

Q

; •: '

"•'•.>

*

Name of Claim

Group 1;

Diamond Harrison Maxy D ,

;

 H. Hawk Chestnut Burr Little Ello n Little RischG •Grand View N ew Year Silent Friend Kokomo Annie C. Dollie B. Polaris No. 1,. 2 and 3 Lizzie C.

Ella C.- Famous Wei l (unpat. ) Patricia (unpat.}

Survey Number

5662

5662

4586

4546

5405-

5405

550

412

621

496

595

892

9119

9119

12486

9119

9119

4554

4971

Group 2:

Mary . 740 Resurrection 741 Resurrection No. 1 to 15, inclusive 9269 What is Lef t ' 4970 Jew 7141

Golconda 3690 Christmas 763 Lbgan f 19581
rtook 400 Pane

Zanzibar Nos . 1,2,3 and 4 12389 Martha 1032

Bow 11777

Vega Group, includin g the Andrew s Trac t (al l interest therein

owned by the Grantors ) 9112

Malvina 5152

Arlingto n 1366

EXCLUDING , HOWEVER , th e t>. • ' . 1 owing:

A l l that portio n of that certai n drainage an d

transportatio n tunnel , includin g al l existin g

lateral s directl y or indirectl y connected to said

tunnel commonly known as the Yak Tunne l (the portal

or entrance of which is situated on Lot 1 of the Graham Placer Minin g Claim , Surve y No. 563 Am. i n the

southwest quarter of Sectio n 30, T. 9 S., R. 79 w.,

6 th P.M. ) which lies within the said propert y conveyed

hereby, said Yak Tunne l having formerl y been the

propert y of the Yak Mining, Millin g an d Tunne l Company ,

a Colorado corporation , but which is now owned, by and

t he propert y of the Gr.nnt.ors heroin , except that the Grantee shal l have the non-exclusive right to maintai n

and use the said Yak Tunne l and lateral s within said Y ak Tunnel (includin g specificall y the Fann y Rawlings Surve y 461 lateral) , and lateral s withi n said propert y

hereby conveyed for drainage and other purpose s in

connection with his minin g operations , provided however

that such use shall be at Grantee' s sole risk and expense. The Grantee shall indemnif y and save the Grantors harmless from any damage> liability , loss or

expense suffered or incurred by the Grantors in connection with such usage, and Grantors shall have no obligation to repair or maintain said Yak Tunne l and said

laterals but the physical condition thereof with respect to safety , fitnes s for intended use or otherwise

shall be at the sole risk of Grantee and without any

liability therefor on the part of Grantors . Grantors

also reserve the right to, at any time, seal off air

passages in the Yak Tunnel , any lateral s therein or any

other air passages to or from any propertie s Owned by

either Grantor. The aforesaid righ t to use, the

indemnity by Grantee in favor of Grantors , the absence

of any obligatio n to repair or maintain , and the right to

seal air passages , shal l allbe covenants running with

the land to the benefi t and burden of the dominant and

servient lands .

• EXCEPTING and RESERVING, in fav c of Grantors and all the

lands now owned by them, a right-of-vn y through and across the

propert y conveyed hereby and through and across all propert y

which the GRANTEE may hereafter acquire, for the purpose of

construction of lateral s o££ said Yak Tunne l or the extension

of existing lateral s connecting directl y or indirectl y w:th

-2-
Book- 400 Page 99

said Yak Tunnel .

T he parties further agre^ az follows :

1. The GRANTEE covenant::; t.hat he shal l indemnif y and

save GRANTOR harmless fro"» and against any damage,

liability , loss or expense suffered or incurred by

- GRANTOR as a result of water originatin g from the

properties hereby conveyed, subject to his aforesaid right to use the Yak 'runne l tor drainage

purposes for such waters and oubject further to

the reservation that the GRANTEE shall not be

responsible hereunder for any change in character

or composition of such waters afte r the same

« leave, the Yak :TuhneIV ; GRANTORS 3ha11 have the

. • . . right to go upon the pjjbpert^ hereby conveyed

.:•."•: ". for .the purpose of inspection and investigation ,

. with measuring devices and the right to take

• . samples of water for the purpose of determinin g

- to GRANTORS satisfactio n whether the aforesaid

. "• . covenant by GPANTEE is being performed.

2. GRANTORS and GRANTEE do each covenant to the other

. ••' . that they and he, will not pollut e the air of the Yak Tunnel nor obstruct or interfere in any way

. /with the quantity or quality.of the air in and

'..-;:..:.. . flowin g through said Yak Tunnel , an d each of said

""'•: parties indemnifies .the other against'al l liability ,

• loss and 'expens e by reason of any breach of said

'•'.'• •'• covenant.

3.

:

 GRANTEE covenants that he will not use the name

"Resurrection" in connection with the operation

; of the properties conveyed hereby nor will any

corporation or company owning or operating the

. . properties conveyed hereby use such name so long

as the seid "Res-Asarco joint Venture" is active

.-.- 'i n business i n Colorado.

;•'•' • Th e covenants se t forth under th e aforesaid items

1,"2 and 3 are covenants running with the land and shall bind

and run in favor of the servient and dominant lands and sb^U

bind the heirs,-personal representatives, successors and assigns

of the parties hereto, who may become successors in titl e

'thereto .

TO HAVE AND TO HOLD the same unto the GRANTEE, his heirs,

personal representatives, and assigns, forever. GRANTORS do

not warrant the titl e to the properties conveyed hereby and this

indenture shal l bo considered as a Bargain and Sal e Deed in

accordance with §118-1-15, Colorado Revised Statutes , 1963.

-3- ;*
Book 400 Paqe 100

IN WITNESS WHEREOF, the parties hereto have executed this

effective the date firs t above-written.

f i -

:

 ATTEST t / .

-i.': "• "'. J • >•

* ' '"' * '--- A ^ - S.ecretary

Y

AMERICAN SMELTIN G AN D REFININ G COMPANY /

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

RESURREx/ioN MININ G COMPAN Y

ATTEST :

_- -

T

 Secretary

*C "--''ll .;•-'/•

STATE OF MEW YORK }

Robert L. Jone<$V Gran tee

ss.

COUNT Y OF NEW YORK )

T he foregoin g instrument was acknowledged before me this

8th day of June_____ ________ , 1973, by T. A. Snedden , Vice President"

of Americ.!• *. Smeltin g and Refinin g Company.

Witness my hand and officia l seal.

Notar y Public of tha SV&t e of New York ? f;[ My commission expires: -j "•"'•.-! , M»R!$ i. stccx. a. :: '

t

 '••.

"

STATE OF NEW YORK )

ss.

Hi. H H;K5». :*i:.":J '•* >/:;•<«•.:«

{<::. !.:•:» a »:» »:••» Ccs.i.f C...^:.'.i.» [•;•:<-. Moth JO, HM COUNTY OF NEW YORK )

The foregoing instrument was acknowledged before qe this

•y day of , 1973, by /..

__________/ of Ressurection Minin g Company.

Witnes s my hand and official seal. f.^.- i"

• c>

STATE OF COLORADO )

•V ?

:

~ ) SS. CITY AND COUNTY OF ) DENVER )

Notar y Public of the Stat e of ' .{ N e w York '. . . M y commission expires: '•"/ , CAMttl E RUSS O NOTARY FOVv CX Slit* or H.« Tbik N o. 14.)4071I » QtiilititJ in Kin^t Counf y Ce'». filid i n N4W Yorl i Count-/ CenriittiOn Expires Mired 30, lf7 S

• ' .'• i'\

T he foregoin g instrument was acknowledged before me this

-4-
~\

Book -100 Page 101

day of , 1973, by Robert L. Jone s

...... ..Witness my hand and officia l seal.

Notar y public

 '*yOciArt8Tii§sion expires:

-5-
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VTOO' O 98/6Z/OT

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T00'0> 98/ZZ/8

ZOO'0 98/VO/8

1000'0 98/CZ/9

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Haze n Reeearch, Inc.

4601 Indian a St • Golden . Coio B0403 Tel; (303) 27S-4501 • Telex 45-860

* rirr-r an: tarr - Tl'r . reter CCSE- : * •

Pos t Offic e fco: 1 1

teadvili e Colorad o B04fc l

H F I SEFIE s KCi . LAT E F.ECL . cus- ?.•:-. f

OvI-ET J

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 )

beryl 1 iufn,mg/ l (D ) &eryl l ium,ng/ l (T ) Bicarbonat e as 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

<

 cLes s Tha n

B Y :

RESUL T

146

<0.01

0.02

<:o.05-

<0.05

<0.001

<0.001

0.044

C.04t

<0.005

<0.005

146

<o.oo:

<0.00l

50.2

50.5

<1

<0.01

<0.01

0.03

0.04

<0.01

0.01

<0.001

Robert Rostac Laborator y Manager
Hazen Research, Inc.

4601 Indiana St. • Golden, Colo. 60403 Tel: (303) 279-4501 • Telex 45-660 DAT E HRI.PROJEC T H R 1 SEfclE S NO . DAT E RECD . CUS T P.O. *

Cosgri H bunn an d Barrv M r . Peter Cosgri-f f Pos t OH ice Box 11 Leadvill e Colorad o 80461

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 )

pHPotassium,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 as S04,ng/ l

CODES : (T)=Tota l (D)=Di£solve d (S)=Suspende d (R)=ftecoverabl e

< =Less Tha n

B Y :

RESUL T

O.OE

0.25

0.02

0.03

30.4

30.4

o.ie

0.22

<0.000i

<0.0001

0.06

0.10

8.35

i.7t

1.77

<0.001

<0.001

<0.01

<0.01

2.22

2.25

268

11

350

108

«ev e 1986

002-571

32567

4/18/8 0

Robert Rostad Laborator y Manage r
I

Hazen Research, Inc.

4601 Indian a St. • Golden . Colo 80403 Tel: (303) 279-4501 • Telex 45-860

Cosori'H Dun n an d Barrv M r . Peter CosgrH f Pos t DHic e Box 11 Leadvill e Colorad o 80461

DAT E hiav £ H R I PROJEC T 002-E7 J Hft l SERIE S MD . 32567 DAT E RL'CD . 4/15/9 : CUS T F.D. t

REPOR T O F ANALYSI S

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

<0.01

<0.0i

<0.01

0.25

0.34

CODES : (T)=Tota l B Y : (D)-Dissolve d (R)=Recoverabl e

< "Less Tha n

Robert Rostad Laborator y Manage r
•v. oo

-•« u» — « n n n i- in — i « c o MI Ml rt «n -o pi IQ •- -i a

-a a IX TO -> n.f t I I :* O n «•• o in < o

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i -i < o o

o. o «• o- tr

o n o f o f n w w OP — :r n. n» 01 * »•• m m >- — •- o. a. 10

om • j I' -

ii- c '*'•'' '?• a -a

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*•>. O

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1-4n

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«nin

mMl o. nin

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Haz»n R*M>aroh. Inc.

4601 Indiana St. • Golden. Goto. 60403 Tel: (303) 279-4501 • Telex 45-860

. -.-c

-;'. CcsgrH- f Bunn ant! Barry

>r". Peter CcsgriH Pott OH its 6ox !1 Leadvill e Ccloradr BC46 I

F:EP:-FT c

BA«FL i 1EENT.I F I CATIOtf - CDE-2

F'AR^KETE F

LEac!,fsg/ l (T > hagnEsiuc,(r,c/ l (D v Hagr.e£iuir,,«ig/ l '. T

K.anganesE,Eg/ i (T -

rte*cary,sg/HD ;

hercury,Big/ l CT ; Nickel , eg/1 (D ;

pHPotassium , r.g/1 (D :

Pot£SE3UB,(Cg/ l (T ) Seleniuc , ,

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 as S04,cg/ l Thalliue,«g/ l (D ! Thslliue,ng/l(T ) Tin , Eg/1 (D )

CODES :

m«=7otai (D)=Disso)ve c

HF: I PFCJEC HF:! E DAT E P.ECD . CUS T P.O.*

P £ S '_ (.02

o.o:

3c.

Vi

:£.:

- 0.27

0.3C

(C.OCO J

<C.OC01

'iO.O ! O.C3

B.C :

2.!9 •? ?•• •* • W m.

0.0(1

002-3EV

E£ ND. 32791

5/30/E e

Tha n

Robert Rcstac Laborator y nanager
« V <«"•" o

H«z»n Research, Inc.

4601 Indiana St. • Golden. Goto. 60403 Tel: (303) 278-4501 • Telex 45-86C

Co&grift * Dunn an d tarr y

fj*.r;,.-.^€ter Cosorif f Cf'bV t Offic e fo x ! I Leadvili e Colorao c 80461

SAMPL E CDr-2

DAT E H &

. ; PROJEC T HP. - 5EF1E S KC . DAT E RECi . C'JS T

 S .C. *

REPOr" 0= ftNALY5!£

Zvr.e 2"

002-38V

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/cp Loppe r ,rg/ l (T - Coppe r ,ing/ i (T )

C.l f

0. *:

5 5;

0.02

0.02

''Sjl^V^^^j^l . 7 •.v>?y^v;.>;*:'•:; --.'" .^•.•V^-?-1

 '-.-"•":". • ~

~ ' - ' *' " ".' •

CODES : (T)*Tott ! (D)«Dissolved (S)*Sutpende d

< =Let s Tha n

B Y :

Robert Rostad Laborator y Manaoe-
o

Hazen Research, Inc.

4601 Indiana St. • Golden. Colo. 60403 Tel: (303) 273-4501 • Telex 45-860

Cosgrif f Dunr & Berry Pos t Offic e Box 11 Leadvill e Colorado 8046!

DAT E H R I PROJEC T H R I SERIE S NO . DAT E RECD . CUBT P.O.*

Augus t 4

002-94V

33096

7/il/e t

1996*

REPOR T 0 ? ANALYSI S

SAMPL E IDENTIFICATION : CDB3

PARAMETER ''•

( 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 ) PHSolidstSuspended ) ,aig/ l

RESUL T

0.002

0.001

0.01

<0.01

0.03

0.01

0.23

0.02

<0.0001

<0.0001

0.31

'0.0 6

8.13

15

CODES : (T)=Tota l <D)=Di£EDlved

 (S)=Suspende d (R)=Recoverabl e

< «=Les5 Tha n

Robert Rostad Laborator y Manage r

Correctio n to report dated Jul y 24, 1986.
Hazen Research, Inc.

4601 Indian a SI. • Golden , Colo. 80402 Tel: (303) 279-4501 • Telex 45-860 H R I PROJEC T H R I SERIE S NO . DAT E RECD . CUS T P.O.*

ftuguE t 22 196t

005-172

33376 B/e/e t

CosgrH f Dun n an d Berry M r . Peter Cosorif f Post Offic e Box 11 Le.advill e Colorad o 80461

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

PHS o l id s (Suspended ) .Big/ ! Zinc,mg/1(T ) Zinc,«ng/ l <D )

RESUL T

<0.00l

<0.001

o.oe

0.04

0.19

0.10

0.26

C.14

<0.0001

<0.0001

8.10

232

0.27

0.02

CODES : (T)=Tota l (S)-Suspende d

< =Less Tha n

B Y : (D)=Dissolve d (R)=Recoverabl e Robert Rostad Laborator y hanager
Kazen Research, Inc.

_ . ^_ _ . 4501 Indiana S: • Golden . Coio 80403 KAZEN Tel: (303) 279-4501 • Telex 45-860

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 -

<0.001

<O.O I

<0.0l

LES C , IR C / i ; L

• i & -"* u- £ 11 £ a c • n; v • - * tlar.Ccnese . niu/ } H E . "cu- y , P.c/1 (T ;

r^er curv.Bc/ 1 CD.-

o. r

o. i:

c.oco;

Solid s (Buspenflfed ; .ir : Z i n c ,ir,g/ l (T ; Zinc,ir,o/ i (D )

t , Or

CODES : ( T ; ( B )

vc-c

(R)=Fcecovereb i e Tha n

Robert Rosts s Lcborator y hsnsge r
Poor Quality Source Document

T he followin g document images

have been scanned from the best

available source copy.

To view the actual hard copy, contact the

Superfun d Records Center at 303-312-6473
Hazen Research, Inc.

4601 Indian a St. • Golden. Colo. 80403 Tel: (303) 279-4501 • Telex 45-860 DAT E H R I PROJEC T H R I SERIE S NO . DAT E RECD . CUS T P.O.*

December 1 1986

009-187

34151

10/29/Bc*

Leadvill e Corporatio n M r . Dougla s Christopherso n Pos t Offic e Box 933 Leadvill e Colorad o 80461

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 , (Ti g / i (T) Leac ,fHQ/ i (D ; Manganese,IR§/ 1 CT ; Manganese , Kiy/ 1 <'D ) Mercury,n;g/ i (T >

Mercury,-ng/ l tD )

pHZinc,ng/l(T ) Zinc,ir,g/ l (D )

RESUL T

0.0014

0.0007

0.003

0.002

0.0002

0,209

0.0004

0.003

<0.001

0.002

<0.00i

0.12

0.02

.0.0006

<C.0001 B.59

0.209

0.082

CODES : (T)=Tota l (D)=Dissolve d (S)=Suspende d (R)=Recoverabl^

< =Les s Tha n

Robert Rostad Laborator y Manage r

*Date of additiona l reques t - NoveT.&er 19.
0

Hazen Research, Inc.

. .--^li"! 4601 Indian a St. • Golden, Colo. 80403 HAZEN Tel: (303) 279-4501 • Telex 45-860

Leadvill e Corporatio n M r . Dougla s Christopherso n Post Offic e Box 933 Leadvill e Colorad o 80461

DAT E H R I PROJEC T H R I SERIE S NO . DAT E RECD . CUS T P.O. *

Novembe r 13 1986

009-187

34151

10/29/8 6

REPOR T O F ANALYSI S

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

0.0014

0.0007

0.003

0.002

0.0002

3

0.209

CODES : (T)=Tota l (D)=Dissolve d

(S)=Suspende d (R)=Recoverabl e

< =Less Tha n

Robert Rostad Laborator y Manage r
Hazen Research, Inc.

4601 Indian a St. • Golden , Colo. 60403 Tel: (303) 279-4501 • Telex 45-860

Leadvill e Corporatio n H r . Douglas Christopherco n Post Offic e Box 933 Uadvill e Colorado 60461

DAT E H R I PROJEC T H R I SERIE S NO . DAT E RECO. CUS T P.O.I

December

009-187

34334

11/21/8 6

10 1986

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 )

pKSolidt(Suspended),«g/ l Zinc,«g/l(T ) Zinc.ag/HD )

RESUL T

0.0005

0.0004

<0.001

<0.001

0.004

<0.001

0.13

0.09

0.0002

<0.0001

8.37

5

0.083

0.030

COOES:

m «= Tota l (D)>Dissolved (S)=SuBpended (R)«Recoverabl e

< «Less Tha n

B Y :

Robert Rostad Laborator y Manager
EXHIBIT D
r I

r /*>/ t^.?.

M '**$< ('•O l COLORADO DEPARTMENT OF HEALT H

Richard D. Lamm XJS ^

 M^>SX.J/ Thomas M. Vernon, M.D. Governor XJ fi 7 %>^r Executive Director

November 7, 1986

M r. Doug Christopherso n Leadville Corporation P.O. Box 933 Leadville , Colo. 80461

R E: Discharge Permit Applicatio n Completenes s Review Leadville Corporation

CPDS NO.: CO-0041505 Lake County

Dear Mr. Christo; ri

We have reviewed the above referenced applicatio n for a discharge permit

and have found it to be incomplete. Please submit the results of

analysis for the acid fractio n of the priorit y pollutant s as discussed

with you on 9/29/66 and again on 10/30/86.

As discussed with you on September 29, 1986 the point of discharge from

your facilit y will have a significan t impact on permit conditions. If

discharge is other than via the Yak Tunnel , for example to Big Evans Gulch, effluen t limitation s may be more stringent but there are less

legal complexities and a more timel y permit is likely . Additionall y

existing data you provided shows the quality to be fairl y close to

meeting standards for Big Evans Gulch. If discharge is via the Yak Tunnel , extreme legal complexity is likely because of current litigatio n

as well as complex technical issues arising from effluen t limitation s at

the point of discharge, which is the portal. It would therefore be

necessary to isolate flow s from your propert y to the portal or to collect

a similar volume of water at the portal and treat it to proper

limitations . Discharge via the Yak Tunnel will likel y require compliance

with technolog y based effluen t limitation s as they are generally more

stringent than water quality standards for California Gulch. If your

contribution is isolated to the portal , it is likel y maintenance will be

a significan t problem. It a similar volume of water is treated at the

portal , extensive treatment will be necessary because of reduced quality

from passage through the tunnel. Please give this matter careful

consideration and let us know which discharge mode is desired or if you

can think of another. If you care to discuss in more detail , we will be

happ y to meet with you.

4210 EAST 11TH AVENU E DENVER , COLORADO 80220 PHON E (303) 320-8333
Page 2

As a final point , please be aware that you should consider post-mining

hydrolog y before activel y mining this site. You wil l be held responsible

f or the qualit y of the effluen t irom this facilit y even after mining at

this site ceases. If the discharge is to Big Evans Gulch, a discharge

permit will stil l be required. If discharge is via the Yak Tunnel the

situatio n is quite complex; your responsibilit y for your effluen t will

still be maintained and will likely need to be compatable with any

resolution of the current litigation .

If you have any questions, please fee l fre e to contact me at 320-8333,

extension 3463.

Sincerely ,

4 ^.•-*

Jud y Bruch Public Health Engineer Permits and Enforcement Sectio n WATE R QUALIT Y CONTRO L DIVISIO N

JB/nj f

x c: Ken t Hanson , Attorne y General' s Office , CEKCLA Jerr y Goad, Attorne y General' s Office , WQC D Carol Russell , Drinking water/Groun d Water Section , WQCD County Health Department Permit Section , Environmental Protectio n Agency Gary Soldano, D.E., Field Suppor t Section , WQCD
EXHIBIT E
PARAMETER

A S (T ) C D (TR ) CU (TR ) P E (TR ) F E (SOL ) M G (SOL ) K G (T ) M I (R ) S E (T ) ZN (R ) F E (R ) K G (R ) T S S

7-16-87

C DH PERMIT LIMITATION S

0.17000

0.00030

0.01000

0.00400

0.93000

0.15000

0.00020

0.13000

0.02400

0.18000

3.30000

3.40000

25.00000

Proposed Water Qualit y Afte r Treatment*

CDB-6 C DH SPLIT L OW TSS

HOTE A

0.00070

0.00300

0.00200 HOTE E NOTE E NOTE C NOTE & NOTE I

0.20900 NOTE A

0.12000

3.00000

SEGMENT 7 EVAN S GULCH STANDAR D

0.05000

0.00100

0.01000

0.00400

0.30000

0.05000

0.00005

0.05000

0.01000

0.10000

1.00000

1.00000

Elkhor n Shaf t

R<0005

.001

.003

.0003

.022

<5

NOTES: (A) Not analyzed for; See COB 1 an d CDS 2 for data: A T? of Saiples: AS - 0.001

C DB 1 and CDB 2 NX - 0.065 SE - 0.002 F E - 0.58 (T )

( B) Hot analyzed under parameter protocal indicated,

( C ) Average o f AL L L.C. YAK Sample s HG C DB 7: HG (T) = 0.0002 TSS « 5 C DB 6: HG (T) B 0.0008

0.00014

*This IB a n actual physical sample with low TSS. Thi s sample

demonstrates the potential water qualit y based on proposed

treatment to reduce suspended solids .
EXHIBIT F
Hazen Research, Inc.

4601 Indian a Si • Golden . Coio 80-10:1

7 <> .t

r

>m . Ti-i... .i'. .".LI DAT E M R I PROJECT H R I SERIE S NO . DAT E RECD . CUS T P.0.« Leadvill e Corporatio n M r . Doucla s Christopherso n Pos t Offic e Bo x 933 Leadvill e Colorad o B.0461

Jun e 1 196?

009-187

35515-A 4/4/8 7

REPOR T O F ANALYSI S

SAMPL E IDENTIFICATION : BE 4 4 7

PfiPftHETE R

Uraniua.oC i /!•''; •

Gros s Aloh a t * -Fre e is i on • Gros s Beta i + -Precis i or, • Radium-22 6 •. *-Prac j si or. t

« . c>. •.

Al l-al i n i tv t Total ; as 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 ol i form s (Fecal i ,pe r 100 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(+-4.8i

134

0.07

<0.01

0.12

<0.01

20

<0.05

<0.001

7.9

<0.01

^.01

<2 O.OB

0.03

<0.01

0.12

o.oe O.OB

CODES : <T)«Tota l (S)«Su«p«nde d

< "Let s Tha n

B Y : <D)=Disso l veci

(R)«Recover»b U Robert Rostad Laborator y Manager

Uraniu m result s reported assumin g the activit y of natural U « 6.77 X 10-7 Ci/ g

•Variabilit y o f the radioactiv e 01sintegratio n proces s (countin g error ) at the 9 T confidenc e level,1.9 6 x sigm a
Haze n Research, Inc.

4601 Indian a St . • Golden . Coio 8(Wf>:' . Tel: (303 ) 279-<»f>Oi • !«>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 19B7

009-187

35515-B 4/14/8 7

Leadvill e Corporatio n M r . Dougla s Christopherso n Pos t Offic e Box 933 Leadvill e Colorad o 60461

REPOR T O F ANALYSI S

SAMPL E IDENTIFICATION : 8E414B7

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

PHPhenols,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

0.01

0.04

0.02

<0.0001

0.02

0.03

0.10

0.06

<0.01I

6.26

<0.1

0.013

<0.01

108

<5

10

0.07

<0.005

0.04

CODES : (T)*Tota l {D)*Dissolve d (S)*Suspende d (Rl^Rccoverabl e

< 'Les s Tha n

Robert Rostad Laborator y Manager
> '" '

3 Hare n Research, Inc .

4601 Indiana S! • Goiaen. Co>o PO Tel: (303) 279--ISOi • Toio . .:•• f-iv M M I-KOJEC T H R I SERIE S NO . DAT E RECD . CUS T P.O.*

Leadvill e Corporatio n M r . Dougla s Christooherso n Pos t OH ice Bo:: 933 Leadvill e Colorad o 80461

REPOR T O F ANALYSI S

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 15

009-187

35587-A 4/23/8 7

1987

AlkaS in i tv (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 ) ,per 100 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

124

<0.05

<0.4

0.005

0.19

<0.01

3.5

0.08

<0.001

0.34

<0.01

0.01

<2

0.01

0.015

0.006

0.07

0.13

0.07

0 . 0 4

iD)=Dissolve d

(R)=Recoverabl e Robert Rostad Laborator y Manage r

Uraniu m result s reported assumin g the activit y of natural U = fc.77 X 10-7 Ci/ g •Variabilit y o f 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 a
Haze n Research, inc.

4601 Indiana St • Golden . Coio 80<".n3 Tel: (303) 279-4501 • Toifx -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:: 933 Leadvill e Colorad o 80461

Jun e 15 198

009-187

355B7-B 4/23/8 7

REPOR T O F ANALYSI S

SAMPL E IDENTIFICATION : BE42287

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

0.02

0.01

<0.0001

<0.0l

0.01

0.09

0.10

<0.01

<0.5

8.17

<0.001

<0.01

326

<5

16

<0.1

(0.001

0.12

CODES :

( S ) 'Suspende d

<

 s Les s Tha n

(D)*Dissolve d ( R ) 'Recoverabl e Robert Rostad Laborator y Manage r
Heze n Research, Inc.

4601 Indiana St • Golden. Coio 80-103 T el (303) 279 aWM • TH^> .v. nr.n

DAT E M X I PROJECT H R 1 SERIE S NO . DAT E 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 60461

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)

44

0.02

<0.2

0.002

0.04

'.0.0 1

50

<0.02

<0.001

0.41

<0.01

<0.01

<2

<0.01

0.007

< 0.005

0.02

0.06

0.01

0.04

CODES :

<T)=Tota l •:S ) =Suspende d

•. =Les s Than

B Y :

Jun e I S !<?£

009-187

35694-A 5/5/8 7

(D)=Dissolve d (R)*Recoverab l Robert Rostad Laborator y Manager

Uraniu m result s reported assumin g the activit y of natural U = 6.77 X 10-7 Ci/g

•Variabilit y o f 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.

4601 Indiana St. • Golden . Goto 80003 Tel: (303) 279-/i r

> n i • Toio x .15-KfiO DAT E Hft l 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 x 933 Leadvill e Colorad o 80461

REPOR T O F ANALYSI S

SAMPL E IDENTIFICATION : BE5587

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 N i tr i teta s N),mg/ l O i l an d Grease.rag/ 1 PH

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

0.01

<0.01

<0.0001

0.02

0.01

0.09

0.13

<0.01

<0.5

7.90

<0. 1

<0.001

<0.01

60

<5

5

<0.05

<0.001

0.04

Jun e I S 1967

009-1B7

35694-B 5/5/8 7

CODES :

<T)=Tota l (S)»Suspende d

< . 'Les s Tha n

(R)sRecoverabi c Robert Rostad Laborator y Manage r
Haze n Research, Inc.

4601 Indian a Si • Golden . Colo 8CM03 T e l (30.H ???) 'i

r

. o i • TI-I,.« .!' . nr.f. DAT E UK I PKUJtU H R I SERIE S NO . DAT E RECO . CUS T P.O.*

Jun e 22 1987 OuV-167

35921-2

6/5/8 7

Leadvill c Corporatio n M r. R. I. Urnovit : Pos t Offic e Bo x 933 Leadvill e Colorad o 80461

REPOR T O F ANALYSI S

SAMPL E IDENTIFICATION : BE-06bSB7

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 )

pHSolids(Suspended),rag/ I Zinc,ng/l(T )

2inc,«g/HD )

RESUL T

<0.001

<0.001

<0.02

<0.02

0.014

0.002

vO.O l

<0.01 X0.0001

<0.0001

8.36

6

0.06

0.04

CODES : (T)-Tot* l <S)-Suspende d

< =Le«s Than

DV.C

iR)-RecovBrab: c Robert Rostad Laborator y Manager
Haren Research, Inc.

4601 Indiana St. • Golden . Goto 80403 Tel. (303) 279-4501 • Tplex .1^ flfinDAT E H R I PROJFC T H R 1 SER1L S NO . DAT E RECD .

cusr p.o.« Leadvill e Corporatio n Pos t Offic e Bo x 933 Leadvill e Colorad o 8C>4c l

REPOR T O F ANALYSI S

Jul y 2B 19B7

009-187

36253

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 )

pHS o l ids(Suspended ) Zinc,»g/l(T ) Zinc,mg/liD )

me/ 1

RESUL T

<0.0005

<0.0005

0.001

<0.00l

0.001

<0.001

0.01

<0.01

<0.0001

<0.0001

8.42

<5

0.002

0.001

CODES : B Y :

"Sutpinde d

=L658 Tha n

<D)=Dissclve d

<ft}afieco/or62i e Robert Rostad Laborator y Manage r
HAZEN

Haze n Research, Inc.

4601 Indian a Si. • Golde n Coio 804C3 Tel: (303) 279-<50l • TPIRX 45 flr,n DAT E H K 1 PkOJIL U H R I SERIE S NO . DAT E RECb . CUS T P.O.*

Augus t 27 198?

009-187

36506

8/7/8 7

Leadviii e Corporatio n Pos t Offic e Bo;: '3 3 Leadvill e Colorad o

Or

SAMPL E IDENTIFICATION : 3E-08|p7|87

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 )

pHS ol ids •« Sus p end £0 1 ,

:in c .mg / 1 iT > Zinc , ay/ 1 (lit

< 0.0005

< 0.0005

<0.001

< 0.001

<0.001

<0.01

-.0.0 1 Ui.OOO l

<0.000l

S.3 5

<5

<0.00i

<0.001

CODES : (T)sTota l < S > =Suspend« o

• >: «Les s Tnan

ID;=D:ssolve o Robert Roctad Laborator y Manager
Hazen Reaearch, Inc.

4601 Indian a St. • Golden. Colo. 80403 Tel: (303) 279-4501 • Telex 45-860 DAT E H R I PROJEC T H R I SERIE S NO . DAT E RECD . CUS T P.O.*

Jul y 16 1987

009-187

36128

6/26/8 7

Leadvill e Corporatio n Pos t Offic e Bo x 933 Leadvili e Colorad o 80461

(ELKHOR N SHAFT ) REPOR T O F ANALYSI S

SAMPL E IDENTIFICATION : ES-062587

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

<0.0005

0.001

0.003

0.0003

7.90

<0.0005

<5

0.022

<0.0005

0.001

<0.0005

0.022

0.005

CODES :

iT>=Tota l (D)=Dissclve d

«3i=Suspende d (R)=Reco\arabl e

< =Les6 Tha n

Robert Rostad Laborator y Manage r

Dat e o r additiona l reques t - Jul y 1
Hazen Research, Inc.

4601 Indian a St. • Golden , Colo. 80403 Tel: (303) 279-4501 • Telex 45-860 DAT E H R I PROJEC T H R I SERIE S NO . DAT E RECD . GUS T P.O.*

Jul y 15 1987

009-187

36128

6/26/8 7

Leadvill e Corporatio n Pos t Qf-fic e Box 933 Leadviil e Colorad o 80461

REPOR T O F ANALYSI S

SAMPL E IDENTIFICATION : ES-062587

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

<0.0005

0.001

0.003

0.0003

7.90

<0.0005

<5

0.022

CODES : (T)=Tota l (S)=Suspsnde d

< =Lss5 Tha n

B Y : ( D > =Di5Eo l

lR)=RECoversbl & Robert Rostad Laborator y Manage r
EXHIBIT G
B I G EVAX S a'LCH WATE R QUALIT Y SAMPLE S

i Cadriun

Sampl e I.D . (Date ) 1 T

i

BE 4 14 87* j <0^-

l

BE 4 22 87* '• <(^-

BE 5 3 87* <(£Q

BE 6 5 87 <0°^ -

BE 7 10 87 <0°-52i

BE 8 07 87 ! <0

»

i I Copper

D j T

n/a ! 0 —

n/a

.

 0 ' ( — M

n/a :<0 —

001 J32 <Q <0-~-

<0

0005 000l

1

<o .<

D

n /a

n /a

n /a

<oS*

<0

00i

<0

ooi

Lead

T

o2L

oPA

04

0

:1—

O

ooi

<»TM

Manganese

~f ' D T i D

n/a ! O-^ 1 0 —

n/a : O-1 0 —

n/a

 :

0^1 .oai

0 0 2 f' l 0 1 Cf^^^- sir- <0 —

^001 o! ^Ql

^001 /.pi ^Qi

•

Mercurj

T

<o5°P l

<0

oooi

^0001

0001

"

<0pooi

<0

2221

r

D

n /a

n /a

n /a

<0oooj.

0001

pOpi

P ll TSS ! Zin c |

I T i D j

8 — < 5 ' 0 — n/a j

!

1

8— :<5 0^ n/a

7 — <5 0~ n/.i

8^ i 6 0^ oH

8

« <5 oP02 ^00.

g35 .

 <5 <()001 <()001

t

T - Tota l Mg/L D- Dissolved Mg/ L

* Complet e Analysi s of NPDES Requirement List
EXHIBIT H
E PA REGION VIII SUPERFUN D DOCUMEN T MANAGEMEN T SYSTEM

DOC ID # PAGE #

IMAGERY COVER SHEET

UNSCANNABLEITEMCS ^

Contact the Superfun d Records Center to view this (these) document(s).

(303-312-6473)

,333 %U

SIT E N4ME :

REPORT OR DOCUMEN T TITLE:

vg^A U

DATE OF DOCUMENT :

DESCRIPTION OF IMAGERY:
EXHIBIT I
Section 2.1-General Concrete Requirements

2.1.1 General

F or the purpose of these specifications , cementitious materials

shall be interpreted to mean portlan d cement or portlan d cement plus

a pozzolan : Provided, that the pozzolan , as specified, shall not

exceed 20 percent, by weight , of cement. Either of these cementitious

materials are suitable for use in all cast-in-place concrete and

concrete products except portlan d cement is required for grout for

pressure grouting and grout for backfil l grouting as specified in

paragraphs 1.2.5 and 1.4.1.

2.1.2 Material s

a. Cement-Portland cement shall meet the requirements of ASTM

designation: C 150 for type II cement and shall meet the low-alkali

and false-set limitations specified therein. The low-alkali limitation

for cement may be waived on request if the sand and coarse aggregate

do not contain objectionable quantities of potentiall y alkali-reactive

particles on the basis of mortar bar tests and complete petrographic

analyses of the proposed aggregate. The cement shall be free fron

lumps and contamination by water and other foreign matter when used in

concrete.

b. Pozzolan-Pozzolan shall meet the requirements of ANSI-ASTM C

6 18 for class N, F, or C with the followin g additional requirements:

( 1) The maximum percent of sulfur trioxide shall be 4.0

percent for classes F and C.

( 2) The maximum percent loss on ignition shall be 8.0 percent

for class N and 2.5 percent for classes F and C.

( 3) The pozzolanic activity index with lime shall be determined

using 2-inch cubes and the minimum strength at 7 days shall be 900

pounds per square inch.

( 4) Unles s aggregates are selected which are not potentiall y

alkali reactive, pozzola n shall be tested for reduction of mortar

expansion at 14 days as specified for class N pozzola n under the optional

physical requirements in ANSI/ASTM C 618. However, the cement used in

the test shall be low alkali . For the pozzola n to be acceptable, it

shall result in an expansion reduction of zero percent or greater

when compared to the control test.
concrete reauirements page 3

Table 2B-Sand grading requirements

Sieve No.

4

8

16

30

50

100 Pan.

Individual percent, by weight ,

retained on sieve

0 to 5

5 to 15*

10 to 25*

10 to 30

15 to 35

12 to 20

3 to 7

* If the individual percent retained on.the No. 16 sieve is

20 percent or less , the maximum limit for the individual

percent retained on the No. 8 sieve may be increased to

20 percent.

T he grading of the sand shall be controlled so that the finenes s

moduli (ASTM designation: C 136 ) of at least 9 out of any 10 consecutive

test samples of finished sand will not vary more than 0.20 from the

average finenes s modulus of the 10 test samples.

e. Coarse Aggregate-The coarse aggregate as batched shall consist

of clean/ hard, dense, durable, uncoated rock fragments. Coarse

aggregate may be rejected if it fail s to meet any of the followin g

quality requirements:

( 1) Los Angeles abrasion loss (ASTM designation: C 131, using

grading A) .-Ten percent maximum loss of weight at 100 revolution's , or

40 percent maximum loss of weight at 500 revolutions.

( 2) Sodium sulfat e test for soundness (ANSI/ASTM C 88).-Te n

percent maximum weighted average loss by weight after 5 cycles.

( 3) Specifi c gravity (ASTM designation: C 127 ) saturated,

surface-dry basis.-2.54 minimum.

( 4) Deleterious substances (in any size of coarse aggregate).- As shown in table 2C.

Tabl e 2C-Allowable percentages of deleterious substances in coarse aggregat Maximum percent by weight as batchec

Lightweight material (ANSI / ASTM C 123) . Friable particles (ANSI/ASTM C 142) . Other deleterious substances. S um of all the above deleterious

substances.

1 /2

1 /2

Jus t prior to batching, the coarse aggregate shall be rewashed

by pressure spray and finish screened on multideck vibrating screens
concrete requirements page 2

( 5) Pozzolan shall not detract from the resistance of concrete

to sulfate attack. Bureau of Reclamation research has shown that class

N will not detract from the durabilit y of concrete but classes F and

C shall meet certain chemical criteria. Specifically , classes F and

C shall have an R factor less than 2.5, where the R factor is defined

as "(C-5)/F " and where "C" is the calcium oxide content in percent and

" F" is the ferric oxide content in percent. Calcium and ferric oxide

contents shall be determined in accordance with ASTM designation : C 114

c. Water-Water shall be free from .objectionable quantities of silt ,

organic matter, salts , and other impurities.

d. Sand-The sand as batched shall consist of clean, hard, dense,

durable, uncoated rock fragments . Sand may be rejected if it fail s to

meet any of the followin g quality requirements:

( 1) Organic impurities in sand (ANSI/ASTM C 40).-Color no

darker than the specified standard.

( 2) Sodium sulfat e test for soundness (ANSI/ASTM C 88).-Eight

percent maximum weighted average loss , by weight.

( 3) Specifi c gravity (ANSI/ASTM C 128 saturated, surface-dry

basis).-2.58 minimum.

( 4) Deleterious substances.-As shown in table 2A.

Table 2A-Allowable percentages of deleterious substances in sand______ Maximum percent by weight as batched

Material passin g No. 200 sieve

(ANSI/ASTM C 117). Lightweight material (ASTM designation: C 123 using a solution of zinc chloride) . Friable particles (ASTM designation: C 142) . Other deleterious substance

(such as mica, coated grains,

soft-flak y particles , and

loam). S um of all the above deleterious

substances.

2

1

The sand as batched shall be well graded, and when tested by

means of standard sieves (ASTM designation: C 136) , shall conform to

the limit s in table 2B.
concrete requirements page 4

capable of simultaneously removing undersized and oversized aggregate

from each of. the nominal aggregate sizes. If variations in the water

content of the aggregates entering the batcher occur during intermittent

batching, then a dewatering screen shall be required after the finish

screens to remove excess free moisture. Finish screens may be mounted

over the batching plant or on the ground adjacen t to the batching plant .

Finish screens shall be so mounted that the vibration of the screens

will not be transmitted to the batching bins or scales and will not

affec t the accuracy of the weighing equipment in any other manner.

T he method and rate of feed for finish screening shall be such

that the screens will not be overloaded and that the screening will

result in a finished product which meets the grading requirements of

these specifications . Coarse aggregate shall be fed to the finish

screens in a combination or alternation of nominal sizes which will not

cause noticeable accumulation of poorly graded coarse aggregate in any

batching bin. The finish-screened aggregates shall pass directl y to

the individual batching bins in such a manner as to minimize breakage. Minus 3/16-inch material passin g through the finish screens shall be

wasted unless it is routed back through a sand classifier in a manner

which causes uniform blending with the natural sand being processed.

Water from finish screening, shall be drained in such a manner as to

prevent aggregate wash water from entering the batching bins and

weighing hoppers. Washing and finish screening equipment shall be

subject to approval by the Contractin g Officer .

Seperatio n of the coarse aggregate into the specified sizes,

after finish screening, shall be such that when the coarse aggregate

is tested in accordance with ANSI/ASTM C 117 and ASTM designation:

C 136, it shall meet the grading requirements in table 2D.

Table 2D-Coarse aggregate grading requirements_________________•____ Nominal maximum size 3 /4f inch 1-1/2 inches

Nominal size range. Maximum percent

retained on (indicated) oversize

test sieve. Percent retained on

(indicated ) test

sieve. Maximum percent passint (indicated)

undersize test

sieve

3/16 to 3/4 inch

0%

(7/8 inch)

50 to 75%

(3/8 inch)

2%

(No. 5 )

3/4 to 1-1/2 inches

0%

(1-3/4 inches)

25 to 50%

(1-1/4 inches)

2%

(5/8 inch)
concrete requirements page 5

Table 2D-Coarse aggregate grading requirements-Continued Nominal Maximum size

Maximum percent

passing the No.

200 sieve.

3 /4 inch

0.5%

1-1/2 inches

0'.2 %

f. Air-entraining admixture-The air-entraining admixture shall

conform to ANSI/ASTM C 260.

g. Chemical admixtures-Use of chemical admixtures shall conform

to ASTM designation: C 494 for type A, D, F, or G.

h. Reinforcin g bars-Reinforcin g bars shall conform to ASTM

designation: A 615, grade 60, includin g supplementar y requirements.

i. Curing compound-Wax-base (type 1) and water-emulsified, resinbase (type 2) curing compound shall conform to the requirements of Water and Power Resources Service "Specification s for Concrete Curing

Compound" dated October 1, 1980.

2.1.3 Composition

T he net water-cement ratio or water-cement plus pozzola n ratio

of the concrete, exclusive of water absorbed by the aggregates , shall

not exceed 0.52, by weight. The slump of the concrete when placed

shall not exceed 4 inches plus or minus 1 inch for all concrete. The

compressive strength of the concrete shall be sufficien t to insure that

each concrete mix meets the followin g requirements:

a. Ninet y percent of test cylinders shall have a compressive

strength at 28 days in excess of 4,000 pounds per square inch.

b. The average compressive strength at 28 days of any six

consecutive test cylinders shall exceed 4,000 pounds per square inch.

T he compressive strength of the concrete will be determined

by the Government in accordance with ANSI/ASTM C 31 and C 39 for 6-

by 12-inch cast cylinders. Air-entraining admixture shall be used in such amount as will

effec t the entrainment of from 4 to 6 percent of air, by volume, of

the concrete as discharged from the mixer.

Type C or E chemical admixtures, including calcium chloride,

shall not be used in concrete.

2.1.4 Batching and Mixin g T he concrete, excluding water and admixtures, shall be proportioned

on the basis of batch weights. Batching shall be such that combined

inaccuracies in feedin g and measuring the materials will not exceed 1-1/2

percent for water, cement, and pozzolan ; 2 percent for sand and coarse
. concrete requirements page 6

aggregate; and 3 percent of admixtures. The concrete shall be uniform

in composition and consistency throughout the mixed batch, and from

batch to batch, except where changes in composition or consistency are

directed. The mixing time shall be sufficien t to thoroughly mix the

concrete, but excessive overmixing requiring the addition of water to

preserve the required consistency will not be permitted. The

temperature of the concrete when it is being placed shall be not more

than 90 F and not less than 50 F. Mixers shall be capable of mixing and dischargin g concrete of

the specified slump. Each batch of concrete delivered by truck mixer

to the jobsite from a commercial batch plan t shall be accompanied

by batching.

2.1.5 Forms , Preparation for Placing, , and Placin g Forms shall be sufficientl y tight to prevent loss of mortar

from the concrete and shall be maintained rigidl y in position until

the concrete has hardened sufficientl y to prevent damage by form removal

The bulkhead at the downstream end of the tunnel plug shall be

watertight and shall be constructed to prevent movement during concrete

placement, similar to the detail s shown on drawing 3.

Preparations for placing concrete in the tunnel plug shall be

in accordance with paragraph 1.3.1.

T he methods and equipment used for transportin g concrete, and

the time that elapses during transportation shall be such as will not

cause appreciable segregation of concrete ingredients or slump loss in

excess of 2 inches in the concrete as it is delivered to the work. Aluminum pipes and chutes shall not be used for placin g of concrete or

f or the delivery of pumped concrete. Retempering of concrete will not

be permitted. Any concrete which has become so stil l that proper

placin g cannot be assured shall not be used.

Immersion-type vibrators shall be used to consolidate concrete

in the tunnel plug/ such vibrators shall be arranged for effective

uniform consolidation of the concrete. Immersion-type vibrators shall

be operated at speeds of at least 7,000 vibrations per minute when

immersed in concrete.

2.1.6 Tolerances for Concrete

Tolerances for placin g concrete shall be in accordance with the

following:
concrete requirements page 7

( 1) Variation in length of the tunnel plug

from that shown on the drawings...................+12 inches

2.1.7 Reinforcement

Steel reinforcin g bars shall be placed where shown on the

drawings. Before being placed, surfaces on reinforcement shall be

cleaned of heavy flak y rust, loose mill scale,- dirt , grease, and other

foreign substances. Reinforcement shall be placed to meet the followin g

tolerances:

a. The amount of concrete cover protecting reinforcement shall not

deviate from that specified by more than 1/2 inch if the specified

cover is more than 2-1/2 inches, nor by more than 1/4 inch if the cover

specified is 2-1/2 inches or less.

b. The spacing of reinforcing bars shall not deviate from the

required spacing by more than 1 inch.

Reinforcement shall be accurately placed and secured in position

so that it will not be displaced during the placin g of the concrete.

Unles s otherwise shown on the drawings, the reinforcement shall

be placed so that there will be a clear distance of at least 1 inch

between the reinforcement and anchor bolts , form ties, or other

embedded metalwork.