071116-06mn082-appendix a05 high lake water quality model-135f-it2e

8/12/2019 071116-06MN082-Appendix A05 High Lake Water Quality Model-135f-IT2E

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Prepared forWolfden Resources Inc.

Submitted byGartner Lee Limited

In association with

Northwest Hydraulics Consultants

October 2006

High Lake Water Quality Model


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High Lake Water Quality Model

Prepared for

Wolfden Resources Inc.

October 2006

Reference: GLL 411151

Distribution:

1 Wolfden Resources Inc.

2 Gartner Lee Limited


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(VOL_9_SEC1-

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ary.doc)

Page

1 Introduction........................................................................................................................1

2 Model Configuration .........................................................................................................12.1 Water Quantity.................................................................................................................... 22.2 Water Quality...................................................................................................................... 32.3 Model Output...................................................................................................................... 4

3 High Lake Water Quality Model......................................................................................4

3.1 Hydrological Assumptions ................................................................................................. 63.2 Key Model Component Description and Assumptions....................................................... 7

3.2.1 Combine Mill Effluent........................................................................................... 73.2.1.1 High Lake Tailings................................................................................. 73.2.1.2 West Zone U/G Mine Water: ................................................................. 93.2.1.3 Sewage ................................................................................................. 10

3.2.1.4 Combined L20 Effluent........................................................................ 103.2.2 Residual Natural Drainage................................................................................... 113.2.3 Backfill and Ore Stockpile Areas ........................................................................ 133.2.4 Mine Water Inputs ............................................................................................... 153.2.5 Open Pits (M18 to M21)...................................................................................... 183.2.6 Nutrient Loading from Explosives ...................................................................... 193.2.7 High Lake Discharges.......................................................................................... 19

4 Model Output ...................................................................................................................21

List of Figures

Figure 2.1-1 Stella Object Icons ................................................................................................................... 2

Figure 3.1-1 Sub-basin Model Components for the High Lake Water Quality Model................................. 5

List of Tables

Table 2.3-1 Summary of High Lake Sub-Basin Drainage Areas and Characteristics .................................. 4

Table 3.1-1 High Lake Baseline Mean Annual Precipitation, Evaporation and RunoffDistributions.............................................................................................................................. 6

Table 3.1-2 Hydrological Assumptions for Drought, Wet, and MAP +/- 5% .............................................. 6

Table 3.2-1.High Lake Tailings Production ................................................................................................. 7

Table 3.2-2.High Lake Ore Production ........................................................................................................ 9

Table 3.2-3 Predicted Inflows from the West Zone Underground Mine.................................................... 10

Table 3.2-4 Estimated Concentrations of Parameters Controlled by pH in the Combined Effluent .......... 10


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Table 3.2-5 Annual Volume Reclaim to the Mill ....................................................................................... 20

Table 3.2-6 Summary of Estimated Groundwater Leakage Rates through the High Lake Talik ............... 21

Appendices

A. Results from Bench Scale Flotation Tests

B. Model Water Quality Input Data

C. Average Flow Scenario Model Output

D. Drought Scenario Model Output

E. Low Scenario Model Output (MAP+5%)

F. Wet Scenario Model Output

G. High Scenario Model Output (MAP-5%)


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H i g h L a k e W a t e r Q u a l i t y M o d e l

(VOL_9_SEC1-12_RPT_06NOV14_GLL_High_Lake_WQ_Model_Summary.doc) 1

1 Introduction

The High Lake Water Quality Model was developed, using Stella modeling software, to facilitate the

assessment of the impacts of the High Lake Project on High Lake itself, and the receiving environment.

The model was designed to simulate all the mining related water releases to High Lake, and to predict the

water quality in High Lake and any subsequent discharge water to the Kennarctic River during mine

operations, closure, and post closure (to Year 150). Outflows from the High Lake system were also

modelled, including reclaim water withdrawal to the process plant, groundwater losses and discharge to

the Kennarctic River. The model was run for five different hydrological scenarios: average flow

conditions (Mean Annual Precipitation (MAP) of 280 mm), drought conditions, wet conditions and MAP

plus and minus 5%. This document contains the following supporting information for the High Lake

Water Quality Model: Model configuration;

Model input assumptions and data; and

Model output in tabular and graphical format.

2 Model Configuration

Stella is an object orientated programming environment. Programming in Stella is done using graphical

icons rather than line by line code in traditional programming languages such as FORTRAN. Interpretingand understanding a Stella model requires only a basic understanding of the fundamental objects.

The four fundamental building block objects in Stella are Stocks, Flows, Converters and Connectors.

Figure 2.1-1 shows examples of the icon described below:

Stocks are accumulations that collect inflows less outflows. Stocks are represented as rectangle icons

in the model.

Flows fill and drain Stocks. Flows are represented as pipes with an arrowhead and a valve in the

middle. The unfilled arrow head represents the positive direction of flow. A little cloud appears at the

head or tail of a flow if that end is not connected to a stock. A cloud next to the tail represents a

source to the system while a cloud near the head represents a sink in the system.

Converter are represented as circular icons. They fulfill multiple roles in Stella including:

- Constants;

- External data inputs;

- Calculators (algebraic and logical); and

- Graphical relationships.


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Connectors link stocks, flows and converters to flows or converters. A connection indicates that the

receiving flow or converter is calculating its own value using the value of the linked object in some

way. Connectors are represented as thin solid wires in the model layout.

Figure 2.1-1 Stella Object Icons

2.1 Water Quantity

In the water balance portion of the model there are three stocks representing the volume filled in High

Lake, AB pit and D pit. These stocks track the combined volume of water and deposited tailings in the

lake and pits. Elsewhere in the model are stocks that track only the volume of tailings solids that are

deposited in the lake and pits. Thus, the difference between the total volume and tailings volume is equal

to the volume of water in the respective stocks. In each of High Lake, AB Pit and D Pit, additional water

is assumed to be trapped as pore water in the voids in the settled solids: pore lock out. It is assumed that

the deposited tailings fill the stocks from the bottom up and a level tailings surface is maintained. All

tailings solids once deposited remain trapped and none are reintroduced back into the water column in

suspension or spilled with outlet water. Bathymetric data relating volume to elevation and surface area for

High Lake, AB pit and D pit are incorporated into the model enabling water elevation, settled tailings

elevation and surface area to be determined for each model time step. The following summarizes the

assumptions used when modelling High Lake, and the AB and D Zone Pits.

High Lake

The lake is set to an initial volume equal to the average volume of water at the full natural elevation,

approximately 7 million m3. Once the model commences running, it is assumed that the dams have been

constructed increasing the total storage capacity from 7 million m3 at 283 masl to approximately 11

million m3at 288.5 masl. Mill effluent (including tailings solids and supernatant, deep groundwater from

the West Zone underground mine, sewage and mill area runoff) is deposited in High Lake from the

beginning of the project until the AB Pit is available for deposition in Year 7. The mill effluent is againrouted to High Lake towards the end of Year 10 once the AB Pit has been filled. While the AB Pit is

being filled with tailings solids, the supernatant water and local runoff water are routed to High Lake.

Natural runoff from the immediate High Lake drainage area is also routed to High Lake.

During the first 2 years of operations, High Lake will be filling with tailings solids and inputs from the

various loading sources, but no water will be discharged (spilled) to the receiving environment until the


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water level surface approaches 288.5 masl. Spilling only occurs during the open water season, June to

September. During this time the volume to be spilled is calculated based on the natural stage-discharge

relationship which was adjusted to account for the raised outlet elevation. Additional pre-emptive releases

draw down the lake further during the summer to provide capacity for mining inputs that will continue

throughout the winter. The additional draw down is distributed over the open water season (June to

September)at a monthly distribution similar to the natural runoff.

AB Pit

Initially there is no storage in the AB Pit until after Year 6 when tailings begin to be deposited. At that

time, it is assumed that the pit is completely excavated, thus the initial volume is set at 0 and the storage

capacity is equal to the pit void (3.7 million m3). During Year 1 to 6, only water from direct precipitation

and runoff enter the pit. This water is routed to High Lake. While AB Pit is being filled with tailings, the

supernatant water and local runoff water are pumped immediately back to High Lake. Once AB Pit is full

(Year 10), it is assumed it is filled entirely with tailings solids and then capped with rock.

D Pit

Initially there is no storage in D Pit until Year 12 when mill effluent begins to be deposited. At that time,

it is assumed that the pit is completely excavated, thus the initial volume is set at 0 and the storage

capacity is equal to the pit void (2.1 million m3). During Year 1 12, when the pit and associated

underground are being mined, only water from direct precipitation and runoff enters the pit. This water is

routed to High Lake. While D-Pit is being filled with mill effluent, the supernatant water and local runoff

accumulates in the pit as water cover on top of the settled tailings. Once the surface water elevation

reaches the outlet elevation of the pit, water spills seasonally to High Lake.

2.2 Water Quality

The water quality component of the model was built as an accessory to the water balance model for the

High Lake Project. Water quality concentrations were determined for all of the runoff areas and mine

operations inputs to the High Lake system, and were used in conjunction with the flows from the water

balance portion of the model. The product of the water flows (m3/month) and the associated water quality

concentration (grams/m3or mg/L) results in mass flows of the water quality parameters (grams/month).

AB pit is modeled as never accumulating water and therefore no water quality accumulates. The water

quality in High Lake and D pit are represented as simple constantly stirred reactor tanks (CSTR) which

means all of the water within them has a homogenous water quality and that any water which is spilled isof that same quality. Water quality simulations were performed for 49 different parameters including

organics, cyanides and metals. All water quality parameters were assumed to be conservative ignoring

any precipitation, speciation or degradation.


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2.3 Model Output

The model runs on a monthly time step with computations to be performed at 4 sub-intervals per month

(approximately weekly). The model output is exported to EXCEL and includes for each time step:

Monthly mass flows (grams) for water quality parameters;

Monthly water flow (mg/L);

Monthly cumulative mass for water quality parameters in High Lake and D Pit; and

Monthly water and tailings surface elevation in High Lake, AB and D Pit.

3 High Lake Water Quality Model

The entire High Lake basin was divided into sub-basins to enable water balance and water quality issues

to tracked at different locations (Figure 3.1-1). The drainage areas of each of these sub-basins are

presented in Table 3.1-1.

Table 2.3-1 Summary of High Lake Sub-Basin Drainage Areas and Characteristics

Model Component Description Area m2

High Lake surface area 824,694

M1 High Lake Natural Area Low Metals 453,827

M2 High Lake Natural Area Elevated

Metals

49,456

M3 L17 Local Runoff Area 32,964

L21 thru L24 Lake Area 120,572

M5 L21 thru L24 Land Area 482,393

M4 Upper L19 and L17 Area 195,384

M6 HL Ore Stockpile Area 4,218

M7 Backfill Stock Pile Area 61,955

M8 AB zone waste dump area 202,709

M9 DT zone waste dump area 67,094

M10 DPT zone waste dump area 20,656

M11 DP zone waste dump area 42,147

M15 Natural Residual L20 Drainage Area 170,250

M18/19 AB pit area 94,058

M20/21 D pit area 72,310


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3.1 Hydrological Assumptions

The hydrologic calculations used for land surfaces and lake surfaces in the water balance model are

summarized below:

Land Runoff (volume): Precipitation (depth) * Surface area (area) * Runoff Factor (unitless);

and

Surface Flux (volume): (Precipitation (depth) - Evaporation (depth))* Water Surface area (area).

Table 3.1-1 summarizes the hydrologic input assumptions for the baseline conditions. The runoff

coefficients used for each sub-basin vary and are discussed individually in the following sections for each

sub-basin. In addition to the average flow model, four additional hydrologic scenarios were evaluated:

drought, wet scenarios and mean annual precipitation (MAP)+/- 5%. Details of the hydrological

assumptions for the scenarios are presented in Table 3.1-2.

Table 3.1-1 High Lake Baseline Mean Annual Precipitation, Evaporation and Runoff Distributions

Precipitation Evaporation

Mean Annual Total 280 mm 240 mm

Monthly Distribution Runoff Evaporation

June 44% 16%

July 28% 43%

August 16% 35%September 19% 6%

October 3% 0%

Table 3.1-2 Hydrological Assumptions for Drought, Wet, and MAP +/- 5%

Scenario Year Annual Precipitation (mm)

Year 10 216

Year 11 198

Year 12 240

Drought

All other

years280

Year 10 344

Year 11 360

Wet

All other

years240

MAP +5% All years 294

MAP 5% All years 266


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3.2 Key Model Component Description and Assumptions

3.2.1 Combine Mill Effluent

Mill tailings, solids and supernatant, deep groundwater from the West Zone underground mine, sewage,

runoff from buildings and roads around the process plant, and residual drainage from the L20 catchment

will be routed together as a combined mill effluent.

3.2.1.1 High Lake Tailings

Mill tailings will be discharge year round to either High Lake or the AB or D Zone Pits, along with the

camp sewage, water from the L20 drainage and runoff from the mill area. The tailings will be discharged

to High Lake from Years 1 to 6, Years 7 to 12 (June) to AB Pit and then Years 12 (July) to 14 to D Pit.The rate of tailings production is presented in Table 3.2-1 and is based on the overall waste rock, ore and

tailings material balance presented in Table 4.2-4 in Volume 2, Section 2.4 (Project Description). The

tailings slurry is estimated to be 55% water and 45 % solids by weight (Volume 9, Section 1.3). The

density of the High Lake tailings solids was conservatively set to 1.36 tonnes/m3which represents the

average of tailings solids density used for tailings impoundment sizing. This value was used to calculated

input volume and settled solids volume.

Table 3.2-1. High Lake Tailings Production

Year Tailings Production

(tonnes)

Tailings Solid Volume

(m3)

Tailings Supernatant

Volume (m3)

1 980,146 57118 99830

2 1,309,192 76293 133344

3 1,294,618 75444 131859

4 1,287,490 75029 131133

5 1,286,582 74976 131041

6 1,306,750 76151 133095

7 1,303,551 75964 132769

8 1,310,963 76396 133524

9 1,306,324 76126 133051

10 1,300,126 75765 132420

11 1,097,441 63953 111776

12 1,099,293 64061 111965

13 1,099,293 64061 111965

14 372,817 21726 37972


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The predicted water quality for the tailings supernatant has been calculated based on the effluent quality

measured in supernatant samples generated in a series of flotation tests carried out on samples of ore

from each of the target zones carried out by G&T Metallurgical Services Ltd. The full report of the

testing program and results is presented in Appendix A. Samples of the tailings supernatant were taken

after allowing the tailings slurry to settle for a period of 24 hours and were sent to Vizon SciTech and

CanTest for toxicity testing and chemical analysis. A summary of the analytical results is also presented

in Appendix A.

Two toxicity tests were carried out on each sample: rainbow trout 96 hour LC50and Daphnia magna48

hour LC50. The Daphnia magnawas carried out using the following concentrations: 1, 3, 10, 30, 100%

(v/v). In the sample originating from the AB Zone sample (Test 4), there was 1/10 dead in the 100% and

none dead in the other treatments. In the D Zone sample (Test 5), there was no mortality in any

treatment. In the West Zone sample (Test 6), there was 10/10 mortality in the 100% concentration, and

0/10 in the 30% concentration. The pH in the 100% concentration was 11.3 at test initiation, and 8.8 attest completion. The pH in the 30% concentration was 9.8 at test initiation and 7.9 at test completion. The

elevated pH may account partially for the results of this test.

For rainbow trout 96 hour LC50, smaller pickle jar test were run where 3 fish were added to 4 L of

sample, due to the limited amount of sample volume. After the 96 hour period there was is 1 live fish in

the AB Zone sample, 3 live fish in the D Zone sample, and no live fish in the West Zone sample. It should

be noted that for the AB Zone test, the two fish died in the first 24 hours. On the last day of the test, the

aeration stopped overnight and two of the control fish died. All of the test fish in the West Zone sample

test died on the same day of test initiation (


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Table 3.2-2. High Lake Ore Production

Year Total Ore Mined(tonnes)

Percent AB Zone Ore Percent D Zone Ore Percent West OreZone Ore

1 1,109,464 100% 0% 0%

2 1,440,000 100% 0% 0%

3 1,440,000 36% 56% 8%

4 1,440,000 30% 31% 39%

5 1,439,923 14% 24% 63%

6 1,440,004 0% 28% 72%

7 1,440,071 0% 15% 85%

8 1,440,000 0% 15% 85%

9 1,439,910 0% 18% 82%10 1,439,880 0% 15% 85%

11 1,218,810 0% 2% 98%

12 1,224,000 0% 0% 100%

13 1,224,000 0% 0% 100%

14 415,110 0% 0% 100%

3.2.1.2 West Zone U/G Mine Water:

The West Zone underground mine will extend below permafrost. It is anticipated that deep groundwater

inflow will start in Year 6 and go until the cessation of mining (year 14). The inflows have been assumed

to range from 500 to 1400 m3/day peaking in Year 6. In the absence of site-specific data for deep

groundwater quality, published data from 100 measurements of deep Canadian Shield groundwater

provided preliminary indications of the deep groundwater quality as presented Volume 5, Section 2. The

predicted water quality of the deep groundwater is presented in Appendix B, Table B-3. Given the

potential issues due to elevated levels of metals, specifically cadmium, the mine water from the West

Zone underground mine will be routed to the mill pre-treated using ferric sulfate to reduce the levels of

cadmium to 0.01 mg/L (Volume 8, Section 2.4, Appendix A). It will then be combined with the high pH

mill tailings to further enhance metals removal effectively reducing the concentrations of aluminum,

copper, iron, lead, nickel and zinc to the levels provided in Volume 8, Section 2.4, Appendix A and

summarized in Table 3.2-4. These concentrations were used as a maximum, and when the calculated

concentration of the combined stream is lower, the lower value was used. The estimated water quality of

the combined tailings/underground mine water stream is presented in Appendix B, Table B-4.


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Table 3.2-3 Predicted Inflows from the West Zone Underground Mine

Year Best Case (m3/day)1 - 5 No Flow

6 1,358

7 664

8 670

9 588

10 546

11 527

12 510

13 501

14 484

Table 3.2-4 Estimated Concentrations of Parameters Controlled by pH in the Combined Effluent

Parameter Estimated

Concentrations (mg/L)

pH 10.5

Aluminum 0.30

Cadmium 0.01

Copper 0.02

Iron 0.20Lead 0.02

Nickel 0.02

Zinc 0.29

3.2.1.3 Sewage

Sewage will be treated in a pre-packaged Membrane Batch Reactor (MBR) or Sequence Batch Reactor

(SBR) treatment plant. Discharge from the sewage treatment plant will meet the Guideline for

Discharge of Domestic Wastewater in Nunavut. Sewage discharge will occur continuously throughout

mine life until the end of Year 14. The anticipated sewage effluent discharge rate is 80 m3/day or 2435

m3/month and the predicted water quality is presented in Appendix B, Table B-5.

3.2.1.4 Combined L20 Effluent

Site runoff and drainage from the mill and camp area will be diverted towards and collected in lake L20

including drainage from the mill, camp, day fuel storage, concentrate storage, maintenance shop, and


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building sumps. Natural drainage from the area immediately east of the mill / camp area will also be

collected in L20. For modeling purposes, it is assumed that L20 is flow through and provides no storage

of site water. Water from L20 will be pumped into the mill to be combined with the mill effluent prior to

discharge to High Lake. Details of the key model inputs and assumptions are provided below for each

component.

Runoff from Buildings and Roads in Mill / Camp Area (M13 and M14):

Drainage Area: 49,500 m2(22,904 m2roads and 26,596 m2buildings)

Runoff Coefficient: 0.85 for Years 1 16 and 0.75 for Years 17 on.

Timing: Year 1 to post-closure during the open water season with the same

runoff distribution as natural conditions.

Water Quality: NAG Construction Material water quality presented in Appendix B,

Table B-6 .Overall Assumptions: Entire area highlighted as M13 and M14 on Figure 3.1-1 is assumed to

have the same runoff coefficient, including buildings, and same

drainage water quality.

Natural Residual L20 Drainage (M15):

Drainage Area: 170,250 m2

Runoff Coefficient: 0.6

Timing: Year 1 to post-closure during the open water season.

Water Quality: Existing drainage area water quality as represented by the 75th

percentile of the 2004/2005 data set for L20 to L23 presented in

Appendix B, Table B-7.

Overall Assumptions: Entire area highlighted as M15 on Figure 3.1-1 is assumed to have the

same runoff coefficient and same drainage water quality.

Building Sumps:

Any water in the building sumps will also be collected and discharged with the mill effluent. Presently

the flow associated with this component has been set to 0.

3.2.2 Residual Natural Drainage

Runoff from the Upper High Lake Drainage (L21 L24), local L17 drainage, Upper L17 and L19

drainage and drainage from the un-impacted immediate High Lake catchment will all be routed to High

Lake. For modeling purposes the residual High Lake drainage basin has been divided into 2 separate

zones:


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High Lake Natural Low which drains areas of the basin with lower metal levels consistent with

other drainages in the area, and

High Lake Natural Elevated which drains the area between the AB Pit and the AB Waste Rock

Dump which exhibits elevated metal levels similar to those found to occur naturally in Seep 2

which drains the mineralize area that will not be removed through the development of the AB Pit.

Details of the key model inputs and assumptions are provided below for each component.

High Lake Natural Low (M1):




Water Quality: Water quality based on drainage quality for areas not influenced bydrainage from exposed mineralized areas, as represented by the 75th

percentile of 2004/2005 L15 water quality data (Volume 9, Section

4.3) and presented in Appendix B, Table B-8.



High Lake Natural Elevated (M2):


Runoff Coefficient: 0.6Timing: Year 1 to post closure (TBD) during the open water season.

Water Quality: Water quality based on drainage quality for areas influenced by

drainage from exposed mineralize areas that will remain after pit

development, as represented by the 75thpercentile of 2004/2005 Seep

2 water quality data (Volume 9, Section 4.2) and presented in




L17 Local Drainage (M3):




Water Quality: Existing drainage area water quality, as represented by the 75th

percentile of the 2004/2005 data set for the outflow of L17 (S35)


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Water Quality: High Lake Ore Stockpile drainage water quality for Years 1 to 14 is

presented in Appendix B, Table B-9, derived by Lorax as part of thegeochemical assessment program (Volume 9, Section 1.4). For Year

15 and on the drainage quality is represented by the NAG Construction

Material drainage from the outer 3 m (Appendix B, Table B-6).


same runoff coefficient and water quality. Size of pile is assumed to

remain constant over life the ore stockpile.

Backfill Stockpile (M7):


Runoff Coefficient: Year 1 0.6

Years 2 to 4 - 0.24 (based on 30% of the water infiltrating into the

stockpile (80% of the mean annual runoff or 80% of 0.6) being

released as the pile is not frozen).

Years 5 14 0.5 (core of pile is frozen and drainage is from outer 3

m shell).

Year 15 to post-closure 0.75.

Timing: Drainage from Backfill Stockpile will only occur during the open

water season.

Water Quality: For Year 1 the water quality is the same as the Upper High Lake

drainage (M5). For Years 2 to 14, the Backfill Stockpile drainage

water quality is presented in Appendix B, Table B-10, derived by

Lorax as part of the geochemical assessment program (Volume 9,

Section 1.4). For Year 15 on, the drainage quality is represented by D-

NAG Permanent, presented in Appendix B, Table B-11, derived by


Section 2.4) from the outer 3 m.


same runoff coefficient. The predicted drainage water quality will

vary and is based on:

Backfill stockpile is built from Years 2 to 4. For this period itis assumed that the dump is not frozen and drainage is from

of the pile tonnage;

From Years 5 to 14, the core of the pile is assumed to be

frozen and drainage is from the outer 3 m shell.

Year 15 and on drainage quality assumed to be the same as D-

NAG Permanent.


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3.2.4 Mine Water Inputs

Drainage from the AB and D Waste Rock Storage areas will be routed directed to High Lake. For

modeling purposes the D-Pit Waste Rock Storage has been divided into 3 separate zones: D Waste Rock

Pile - Temporary which will contain PAG material to ultimately be placed underground, D Waste Rock

Pile Permanent which will contain NAG material, and D Waste Rock Pile Temporary/Permanent which

will consist of PAG material placed on top of NAG material. Details of the key model inputs and

assumptions are provided below for each component.

AB Waste Rock Pile (M8):

Drainage Area: 202,709 m2Runoff Coefficient: Years 1 to 3 no drainage as it is assumed to be trapped in the pile

behind the toe dyke.

Year 4 on 0.75 from the outer 3 m and the core is assumed to be

frozen.

Timing: Year 1 to Year 3 dump construction assume no drainage. All water is

held in dump behind dyke and frozen in situ.

Year 4 and on drainage is from the outer 3 m NAG layer only during

the open water season.

Water Quality: The AB Waste Rock Dump drainage water quality is presented is

presented in Appendix B, Table B-12, derived by Lorax as part of thegeochemical assessment program (Volume 9, Section 1.4).

Overall Assumptions: Entire area highlighted as M8 on Figure 3.1-1 is assumed to have no

runoff from Year 1 to Year 3. From Year 4 on, the entire area is

assumed to have the same runoff coefficient. The predicted drainage

water quality from Year 4 on is based on the NAG drainage chemistry

from the outer 3 m shell.


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D Waste Rock Piles Temporary (M9):







m shell).


Timing: Drainage from D Waste Rock Pile - Temporary will only occur during

the open water season.

Water Quality: For Year 1 the water quality is the same as the Upper L17/L9 drainage

(M4). Years 2 to 14, the D Waste Rock Pile - Temporary drainagewater quality is presented in Appendix B, Table B-13, derived by


Section 1.4). For Year 15 on, the drainage quality is represented by the

D-NAG Permanent presented in Appendix B, Table B-11.




The pile is built from Years 2 to 4. For this period it is

assumed that the dump is not frozen and PAG drainage is from of the pile tonnage;


frozen and drainage is from the outer 3 m shell.

Year 15 and on the core of the pile is frozen and drainage is

assumed to be from the outer 3 m NAG material.

D Waste Rock Pile Permanent/Temporary (M10):


Runoff Coefficient: Year 1 0.6Years 2 to 7 - 0.24 (based on 30% of the water infiltrating into the




m shell).



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Timing: Drainage from D Waste Rock Pile Temporary/Permanent will only

occur during the open water season.

Water Quality: For Year 1 the water quality is the same as the Upper L17/L9 drainage(M4). Years 2 to 4, the D Waste Rock Pile Temporary/Permanent

drainage water quality is presented in Appendix B, Table B-14 (D-

NAG Lower Permanent), derived by Lorax as part of the geochemical

assessment program (Volume 9, Section 1.4). For Year 5 to 14, the

drainage is from PAG material with the drainage chemistry the same

as that presented in Appendix B, Table B-13. For Year 15 on, the

drainage quality is represented by the D-NAG Permanent presented in





From Years 2 to 4 the drainage is from NAG material. For this

period it is assumed that the dump is not frozen and drainage is

from of the pile tonnage;

From Years 5 to 7, PAG material has been placed on top. The

pile is not frozen and the drainage quality is assumed to be tat

of tonnage for the PAG material tonnage.


frozen and the drainage is from the outer 3 m of PAG material.

Year 15 and on the core is assumed to be frozen and drainage

is from the outer 3 m of remaining NAG material.

D Waste Rock Pile Permanent (M11):







m shell).Year 15 to post-closure 0.75.

Timing: Drainage will only occur during the open water season.

Water Quality: For Year 1 the water quality is the same as the Upper L17/L9 drainage

(M4). Year 2 on, the D Waste Rock Pile Temporary/Permanent

drainage water quality is presented in Appendix B, Table B-11 (D-

NAG Permanent), derived by Lorax as part of the geochemical


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assessment program (Volume 9, Section 1.4).


same runoff coefficient. The predicted drainage water quality willvary and is based on:

From Years 2 to 4 the dump is not frozen and drainage is from

of the pile tonnage;

From Year 5 on, the core is assumed to be frozen and drainage

is from the outer 3 m of remaining NAG material.

3.2.5 Open Pits (M18 to M21)

During operations, water from AB and D Pits will be pumped directly to High Lake. For the AB Pit, this

will occur until year 6 after, following which tailings will be deposited from year 7 to year 10 (end of 8th

month), until the pit is filled with tailings solids. During this time all tailings supernatant will be

constantly removed from AB Pit (minus that bound up in the solids void spaces) and deposited in High

Lake. It is assumed the pit will then be drained of all water in year 11 and capped in year 12. From year

1 to year 6, the water quality in AB Pit is based on the operating values provided by Lorax (Volume 9,

Section 1.4) and presented in Appendix B, Table B-15. During deposition of tailings and for Year 11, the

operating water quality is still used but the loading is prorated based on the surface area of the water in

the pit. At closure, the closure chemistry will be applied to the remaining surface areas above the spill

elevation (see below for areas). This is essentially drainage from the remaining high wall. For this area

the runoff coefficient is 0.8 in June and 0.6 for the remainder of the year. Drainage from the remaining

pit surface area will be that of D-NAG from the outer 3 meters with a runoff coefficient of 0.75 as

outlined in the following.

Remaining high wall = 30,273 m2 Waste Rock-Pit Input: AB-Pit closure water quality 0.8

June/0.6 remainder;

Capped area = 63, 785 m2 Waste Rock-Pit Input: D-NAG-Perm. 3 m chemistry runoff 0.75.

For D-Pit, waste rock mining starts in year 2. Year 1 drainage chemistry will be that of the existing

natural drainage. Open pit ore mining will take place in Year 3 and Year 4 followed by underground

mining until year 11. From Year 2 to year 11, water will be pumped to High Lake and chemistry will be

determined using the operating water quality provided by Lorax (Volume 9, Section 1.4) and presentedin Appendix B, Table B-16. Tailing will be deposited in D-Pit from half way through Year 12 to Year 14.

All supernatant will remain in the pit. During deposition of tailings, the operating water quality is still

used for the natural drainage of the pit and the exposed pit walls but the loading is prorated based on the

surface area of the water in the pit.


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3.2.6 Nutrient Loading from Explosives

Along with the inputs to High Lake outlined in the previous sections, water that is in contact with mine

rock, and ultimately drains to High Lake, will initially contain nitrogen compounds from explosive

residues: ammonia, nitrate and nitrite. Volume 9, Section 1.4 provides an estimate of the annual loads of

explosive residues to the High Lake tailings impoundment based on the Projected explosives use. Full

details of the calculation of estimated annual nitrogen losses is presented in Volume 9, Section 1.4 and

summarized in Appendix B, Table B-18.

3.2.7 High Lake Discharges

There are three potential discharges from High Lake that have been included in the model: discharge

during the open water season to the Kennarctic River, water reclaim for milling purposes, and potentialgroundwater losses through the lake talik. Details of the key model inputs and assumptions are provided

below for each component.

High Lake Discharge Water:

Water Quantity: Variable tied to the flow in receiving environment during open water

season only. Spill from High Lake is determined based on the lake

elevation using a rating curve. During the initial months of operation

the elevation of High Lake must rise to meet the new constructed

outlet elevation.Timing: Year 1 to post-closure during the open water season June to

September during operations and June to October during closure and

post-closure.

Water Quality: Water quality of discharge water will be that predicted by the model at

time of discharge

Reclaim Water

Water Quantity: Variable over mine life prorated based on a reclaim volume of 3120 m3

for a total annual tonnage of 1,440,000. Annual reclaim water volume

presented in Table 3.2-5.

Timing: Year 1 to Year 14

Water Quality: Water quality of reclaim water will be that predicted by the model at

time of withdrawal.


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Table 3.2-5 Annual Volume Reclaim to the Mill

Year Annual Volume

Reclaim Water (m3)

1 866436.2

2 1124568.0

3 1124568.0

4 1124568.0

5 1124508.2

6 1124571.1

7 1124623.6

8 1124568.0

9 1124497.7

10 1124474.3

11 951829.7

12 955882.8

13 955882.8

14 324180.2

Groundwater Losses:

As discussed in Volume 5 Section 2 Hydrogeology, during operations and through post-closure phases,

there may be deep groundwater losses from High Lake through the underlying flow through talik. While

the surface water discharge from High Lake is limited to the open water season, potential migration

through groundwater to the Kennarctic River occurs year round. For modeling purposes it was assumed

that the rate of High Lake losses through this groundwater pathway would be from 120 m 3/day to 130

m3/day (Table 3.2-6).

Water Quantity: Variable over mine life as presented below

Timing: Year 1 to post-closure

Water Quality: Water quality of reclaim water will be that predicted by the model at

time of discharge


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Table 3.2-6 Summary of Estimated Groundwater Leakage Rates through the High Lake Talik

Year High Lake GroundwaterLosses (m3/day)

0 120

1 125

2 128

3 131

4 128

5 126

6 125

7 124

8 1249 123

10 122

11 122

12 121

13 120

14 and on 120

4 Model Output

The model output is presented in Appendix C through G for each hydrological scenario. Each appendix

contains model output in tabular and graphical format.


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(VOL_9_SEC1-12_RPT_06NOV14_GLL_High_Lake_WQ_Model_Summary.doc)

Appendices


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Appendix A

Results from Bench Scale Flotation Tests

Testing of High Lake Ores (G&T Metallurgical Services Ltd.

Supernatant Toxicity and Water Quality Analysis Results


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TESTING OF HIGH LAKE ORES

WOLFDEN RESOURCES LTD.

KM1741

G&T METALLURGICAL SERVICES LTD.

2957 Bowers Place, Kamloops, B.C. Canada V1S 1W5

E-mail: [email protected] , Website: www.gtmet.com

ISO 9001:2000

Certificate No. FS 63170


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G T METALLURGICAL SERVICES LTD2957 Bowers Place, Kamloops, B.C., Canada V1S 1W5

Fax (250) 828-6159 Tel. (250) 828-6157e-mail: [email protected]

ISO9001:2000FS 63170

December 12, 2005

Mr. Nick Contini, P. Eng.Senior Mineral Processing EngineerWardrop EngineeringSuite 102-957 Cambrian Heights DriveSudbury, OntarioP3C 5M6

Dear Mr. Contini,

Re: Testing of High Lake Ores KM1741

We have now completed the testing activities authorized on mineralized samples from

the High Lake deposit. The objectives of this program, as described in your

correspondence of November 3 and 21, is summarized as follows:

- Produce approximately 5 litres of process water and tailing from a single testperformed on each A/B Zone, Met Composites and HL Met Composite samples.

- Perform a single flotation test on D Zone, Low Zinc ore using conditionsdescribed in your correspondence.

- Perform a single test on an equal weighted composite of Hanging Wall 2, Bottom,Middle and Top composites.

- Perform a series of magnetic separation tests on selected samples of copper andzinc concentrates produced in a previous program. Analyze the magneticproducts for copper, zinc, nickel and iron.

- Perform a single Knelson concentration test on samples of D Zone Low Zinc, A/BZone Stringer, A/B Zone MS-SM, West Zone Top Composite, and A/B ZoneMassive Sulphide.

- Analyze selected concentrate samples for gallium and germanium.


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Unfortunately, due to insufficient sample mass or test product mass, some of the desired

objectives were not achieved. Specifically, assay determinations were not performed on

the magnetic and non-magnetic test products.

As discussed, we have not prepared a technical report to summarize the results achieved

in this program. However, all of the results generated by this program are presented in

the following appendices of data:

Appendix I Sample Origin and Shipping Activities

Appendix II Gravity Concentration and Flotation Test Results

Appendix III Settling and Magnetic Separation Test Results and

Gallium/Germanium Assay Data

If you have any questions regarding the attached data sets or our comments, please do not

hesitate to contact us.

Yours truly,

Tom Shouldice, P. Eng.General Manager - Operations

Report Distribution:Nick Contini, Wardrop Engineering, Sudbury, ON 1 CopyG & T Metallurgical Services, Kamloops, BC 2 Copies


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APPENDIX I KM1741

SAMPLE ORIGIN AND SHIPPING ACTIVITIES


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1

1.0 Sample Origin

Samples previously prepared and produced in KM1569, KM1363 and KM1428

were utilized in this program. As instructed, selected samples were produced inthis program and shipped to various locations. Table I-1 details this shipping

activity.

TABLE I-1SHIPPING DETAILS

Test ProductMass

gramsShipped To

4 Final Tails Slurry 2000 Canadian Environmental



4 Final Tails Slurry 250 Lorax Environmental



4 Final Tails Water 5000 Vizon Scitec




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APPENDIX II KM1741

GRAVITY CONCENTRATIONAND FLOTATION TEST RESULTS


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INDEX

TEST PAGE

1 Knelson Concentration Test D Zone Low Zinc Composite 1

2 Knelson Concentration Test West Zone Top Composite 3

3 Knelson Concentration Test HL Met Composite 5

4 Batch Cleaner Test HL Met Composite 7

5 Batch Cleaner Test D Zone Low Zinc Composite 9

6 Batch Cleaner Test Hanging Wall 2/Bottom/Middle/Top Composite 11


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1

PROJECT NO: KM1741-01

PURPOSE: Knelson Concentration on D Zone Low Zinc Composite (KM1363) Primary Grind.

PROCEDURE: Perform a standard Knelson concentration test on the primary grind. Pan the Knelson

concentrate to about 10 g. The Knelson tail and Pan tail are assayed separately.

FEED: KM1363 D Zone Low Zinc Composite ground to a nominal 91m K80.

FLOWSHEET NO: 4

Stage Inlet Time

Pressure Start Finish Sample Weight Minutes

Grind 1000 g 500 ml 6

KN Separation 1 66 psi 1.6 2.2 2

Cold Water

Outlet Pressures


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2

KM1741-01 D Zone Low Zinc Composite

Overall Metallurgical Balance

Product Weight Assay Distribution

grams % Cu Zn W Ag Au Cu Zn W Ag Au

Knelson Pan Concentrate 1.3 0.1 1.43 0.29


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3


PURPOSE: Knelson Concentrate of West Zone Top Composite (KM1486) Primary Grind.

PROCEDURE: Perform a standard Knelson concentration test on the primary grind. Pan the

Knelson concentrate to about 10 g. The Knelson tail and Knelson pan tail are

assayed separately.

FEED: KM1486 West Zone Top Composite ground to 97m K80.

FLOWSHEET NO:

Stage Inlet Time


Grind 1000 g 500 ml 5


Cold Water

Outlet Pressures


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4

KM1741-02 West Zone Top Composite



grams % Cu Zn W Ag Au Cu Zn W Ag Au

Knelson Pan Concentrate 21.5 2.2 2.91 1.69 0.02 118 45.1 1.6 1.4 0.9 2.4 48.5

Knelson Pan Tail 84.9 8.5 3.63 2.32 0.04 102 2.22 7.9 7.8 7.0 8.2 9.4

Knelson Tail 892.8 89.4 3 .96 2.58 0.05 106 0.94 90.5 90.8 92.1 89.4 42.0

Feed 999.2 100 3.91 2.54 0.05 106 2.00 100 100 100 100 100

KM1741-02 West Zone Top CompositeCumulative Metallurgical Balance

Cumulative Cum. Weight Assay Distribution

Product grams % Cu Zn W Ag Au Cu Zn W Ag Au

Product 1 21.5 2.2 2.91 1.69 0.02 118 45.1 1.6 1.4 0.9 2.4 48.5

Product 1 to 2 106.4 10.6 3 .48 2.19 0.04 105 10.9 9 .5 9.2 7.9 10.6 58.0

Product 3 892.8 89.4 3.96 2.58 0.05 106 0.94 90.5 90.8 92.1 89.4 42.0

Feed 999.2 100 3.91 2.54 0.05 106 2.00 100 100 100 100 100


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5


PURPOSE: Knelson Concentration on HL Met Composite (KM1628/1569) Primary Grind.

PROCEDURE: Perform a standard Knelson concentration test on the primary grind. Pan the

Knelson concentrate to about 10 g. The Knelson tail and Knelson pan tail are

assayed separately.

FEED: KM1569 HL Met Composite ground to 93m K80.

FLOWSHEET NO:

Stage Inlet Time


Grind 1000 g 500 ml 7


Cold Water

Outlet Pressures


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6

KM1741-03 HL Met Composite



g % Cu Zn W Ag Au Cu Zn W Ag Au

Knelson Pan Concentrate 9.5 0.9 4.76 0 .13


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7


PURPOSE: To Produce Approximately 5 Litres of Final Tailings Supernatant/Cleaner Scavenger

Tailing, Rougher Tailings and Tailing Solids.

PROCEDURE: Perform a one product batch cleaner test with regrind and three stages of dilutioncleaning at pH 11.0.

FEED: 2 x 1 kg of HL Met Composite ore ground to a nominal 93m K80.

FLOWSHEET: 2

Stage Reagents Added g/tonne Time (minutes) pH

Lime PE26 PAX MIBC Grind Cond. Float

Primary Grind 750 7 9.5

COPPER CIRCUIT:

Rougher 1 150 20 48 1 2 10.0

Rougher 2 10 30 1 2 10.0

Rougher 3 10 30 1 2 10.0

Regrind 400 7 10.5

Cleaner 1 5 24 1 10 11.0

Cleaner 2 16 1 8 11.0

Cleaner 3 16 1 6 11.0

Cleaner Scavenger 0 5 0 1 4 10.5

Flotation Data Rougher Cleaner

Flotation Machine: D2B D1B Mill:

Cell Size in liters: 8.8 2.2 Charge/Material:

Air Aspiration: Water:

Impeller Speed in rpm: 1200 1200

M3-Mild M3-Mild

Supercharged

20 kg-Mild 20 kg-Mild

500 ml estimated

Note: Added 3.0 ml of A130 Flocculant to Final Tailings Pulp.

Grinding Data Primary Grind Regrind


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8




grams % Cu Zn Fe Cu Zn Fe

Cu Concentrate 212.5 10.5 31.9 0.2 30.2 70.3 12.6

Cu 3rd Cleaner Tail 56.6 2.8 25.0 0.4 14.7 6.4

Cu 2nd Cleaner Tail 117.3 5.8 7.40 0.7 9.0 24.2

Cu Cleaner Scav Con 52.6 2.6 1.62 0.7 0.9 11.0

Cu Cleaner Scav Tail 340.9 16.9 0.31 0.2 1.1 21.2

Cu Rougher Tail 1240.7 61.4 0.31 0.1 4.0 24.6

Feed 2020.7 100 4.77 0.2 100 100


Cumulative Metallurgical Balance


Product grams % Cu Zn Fe Cu Zn Fe

Product 1 212.5 10.5 31.9 0.21 30.2 70.3 12.6

Product 1 to 2 269.1 13.3 30.4 0.25 85.0 19.0

Product 1 to 3 386.4 19.1 23.5 0.40 94.0 43.2

Product 1 to 4 439.0 21.7 20.8 0.44 94.9 54.2

Product 1 to 5 779.9 38.6 11.9 0.34 96.0 75.4

Product 6 1240.7 61.40 0.31 0.07 3.99 24.56

Feed 2020.7 100 4.8 0.18 100 100


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9




PROCEDURE: Perform a one product batch cleaner test with regrind and three stages of dilution

cleaning at pH 11.5.

FEED: 4 x 1 kg of D Zone Low Zinc Composite ore ground to a nominal 91 m K80.

FLOWSHEET: 2


Lime ZnSO4 PE26 PAX MIBC Grind Cond. Float

Primary Grind 350 100 6 9.4

COPPER CIRCUIT:

Rougher 1 150 20 45 1 2 10.1

Rougher 2 10 30 1 2 10.0

Rougher 3 150 10 0 1 2 10.0

Regrind 650 7

Cleaner 1 0 40 5 16 1 10 11.8

Cleaner 2 0 10 16 1 8 11.4

Cleaner 3 2.5 16 1 6 11.0

Cleaner Scavenger 0 10 5 0 1 2 11.6






Note: Added 3.0 ml of A130 Flocculant into Copper Rougher Tailings.


M3-Mild M3-Mild

Supercharged


500 ml estimated


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10





Cu Concentrate 158.9 4.0 24.9 2.63 25.1 90.3 40.8




Cu Cleaner Scav Tail 430.3 10.8 0.11 0.12 1.08 5.0

Cu Rougher Tail 3186.0 80.0 0.08 0.14 5.67 43.5

Feed 3981.4 100 1.10 0.26 100 100





Product 1 158.9 4.0 24.9 2.63 25.1 90.3 40.8

Product 1 to 2 204.0 5.1 19.7 2.17 91.7 43.1

Product 1 to 3 346.1 8.7 11.8 1.38 93.0 46.7

Product 1 to 4 365.1 9.2 11.2 1.45 93.2 51.5

Product 1 to 5 795.4 20.0 5.2 0.73 94.3 56.5

Product 6 3186.0 80.0 0.08 0.14 5.67 43.51

Feed 3981.4 100 1.10 0.26 100 100


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11




PROCEDURE: Perform a two product batch cleaner test with regrind and three stages of dilution cleaning at

pH 11.0 on the copper circuit and pH 11.5 in the zinc circuit. The copper cleaner scavengertail is put into the head of the zinc circuit.

FEED: 1 kg each of Hanging Wall 2, Bottom, Middle and Top Composite (KM1486) ore ground to a

nominal 97m K80.

FLOWSHEET: 2


Lime ZnSO4 NaCN PE26 PAX MIBC Grind Cond. Float

Primary Grind 1000 60 20 5 9.9

COPPER CIRCUIT:Rougher 1 260 20 30 1 1 10.0

Rougher 2 10 15 1 2 10.0

Rougher 3 30 0 1 2 10.0

Regrind 400 15 5 12 11.1

Cleaner 1 0 40 15 16 1 12 11.1

Cleaner 2 4 16 1 8 11.0

Cleaner 3 0 8 1 6 11.0

Cleaner Scavenger 15 5 5 0 1 2 10.4

ZINC CIRCUIT: CuSO4 SIPX

Condition 1 3 11.5

Condition 2 500 2 11.5

Rougher 1 10 15 1 2 11.5

Rougher 2 0 0 1 2 11.5

Regrind 700 30 5 11.8

MIBC DF250

Cleaner 1 0 5 16 0 1 4 11.8

Cleaner 2 0 16 20 1 3 11.5

Cleaner 3 0 0 20 1 3 11.5






M3-Mild M3-Mild

Supercharged


500 ml estimated


Note: Added 3.0 ml of A130 Flocculant into Zinc Rougher Tail.


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12

KM1741-06 Hanging Wall/Bottom/Middle/Top Composite




Cu Concentrate 573.3 14.4 18.2 7.60 27.1 91.3 28.1




Zn Concentrate 207.0 5.2 0.61 42.60 1.10 56.9

Zn 3rd Cleaner Tail 31.9 0.8 0.65 3.29 0.18 0.7

Zn 2nd Cleaner Tail 189.8 4.8 0.28 1.07 0.46 1.3

Zn 1st Cleaner Tail 1045.1 26.2 0.12 0.39 1.10 2.6Zn Rougher Tail 1691.4 42.4 0.28 0.71 4.14 7.8

Feed 3990.7 100 2.86 3.88 100 100

KM1741-06 Hanging Wall/Bottom/Middle/Top Composite




Product 1 573.3 14.4 18.2 7.60 27.1 91.3 28.1

Product 1 to 2 704.3 17.6 15.0 6.53 92.3 29.7

Product 1 to 3 778.7 19.5 13.6 5.99 92.7 30.1

Product 1 to 4 825.5 20.7 12.9 5.76 93.0 30.7

Product 5 207.0 5.2 0.6 42.60 1.1 56.9

Product 5 to 6 238.9 6.0 0.6 37.35 1.3 57.6

Product 5 to 7 428.7 10.7 0.5 21.29 1.8 58.9

Product 5 to 8 1473.8 36.9 0.2 6.47 2.8 61.5

Product 9 1691.4 42.4 0.28 0.71 4.14 7.75

Feed 3990.7 100 2.86 3.88 100 100


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APPENDIX III KM1741

SETTLING AND MAGNETIC SEPARATION TEST RESULTS

AND GALLIUM/GERMANIUM ASSAY DATA


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1

TABLE III-1 SETTLING TEST

HL Met Composite

Final Tailings

TEST CONDITIONS

Elapsed Interface Interface Solids S.G. 2.95

Time (min) Height (ml) Height (mm) Solids Weight (g) 150

Solids Volume (ml) 50.8

0 1000 357 pH ( as tested ) 9.4

0.3 750 267 pH modifier (g/T) -

0.5 640 228 Flocculent Type Superfloc A-130

0.6 550 196 Flocculent ( g/T) 3

1 400 143 Temperature (C) 21

1.5 270 96 Slurry Volume (ml) 1000

2 230 82 Slurry S.G. 1.10

3 200 71 Final Slurry Volume 140

4 185 66 Initial Percent Solids 13.7

5 170 61 Final Percent Solids 62.7

7 160 57

10 150 53

15 145 52

25 145 52

30 145 52

120 140 50

1440 140 50

SETTLING DATA

0

100

200

300

400

0 20 40 60 80 100

Time - minutes

Interface-millimetres

SETTLING RATE CURVE


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2


D Zone Low Zinc Composite

Final Tailings

TEST CONDITIONS




0 1000 357 pH ( as tested ) 10.1

0.3 990 353 pH modifier (g/T) -


0.6 980 350 Flocculent ( g/T) 3



2 950 339 Slurry S.G. 1.22

3 930 332 Final Slurry Volume 345



7 825 294

10 765 273

12 725 259

15 665 237

18 625 223

22 550 196

28 485 173

30 470 168

32 460 164

35 450 160

46 425 152

60 402 143

75 390 139

90 380 136

120 365 130

150 357 127

180 353 126

1440 345 123

SETTLING DATA

0

100

200

300

400

0 20 40 60 80 100

Time - minutes

Interface-

millimetres

SETTLING RATE CURVE


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3


West Zone Composite

Final Tailings

TEST CONDITIONS




0 1000 357 pH ( as tested ) 10.1

0.3 860 307 pH modifier (g/T) -


0.6 740 264 Flocculent ( g/T) 3



2 440 157 Slurry S.G. 1.18

2.5 385 137 Final Slurry Volume 213



5 285 102

6 275 98

7 265 95

10 247 88

28 220 78

300 215 77

540 213 76

1440 213 76

SETTLING DATA

0

100

200

300

400

0 20 40 60 80 100Time - minutes

Interface-millimetres

SETTLING RATE CURVE


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4

TABLE III-4

CONCENTRATE MAGNETIC SEPARATION TESTS

Sample Feed Mass Magnetics Mass

Identification grams grams percent

KM1741-6 Copper Concentrate 10 0.31 3.1

KM1741-6 Zinc Concentrate 10 0.28 2.8

NM1363-12 Copper Concentrate 10 0.27 2.7


NM1363-13 Zinc Concentrate 10 0.37 3.7


Note a) The magnetic separation was performed using a Davis Tube at 900 Gauss.

TABLE III-5

CONCENTRATE GALLIUM AND GERMANIUM ASSAYS

Sample ME-MS61c ME-MS61c

Identification ppm Ga ppm Ge

1486-64 Zinc Concentrate 12.5


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Appendix BModel Water Quality Input Data


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StationWater Quality

GuidelinesAB Zone D Zone West Zone

Date CCMEa

Physical Tests

Conductivity (us/cm 241 406 1239Total Suspended Solids 4 54 16Hardness CaCO3 76 91 391Hardness (Total) CaCO4 76 108 468pH 6.5-9.0 8.8 9.5 11.6

Nutrients

Ammonia Nitrogen 1.78-38.6* 0.083 0.064 0.096Nitrate Nitrogen 13 0.122 0.119 0.093Nitrite Nitrogen 0.06 0.011 0.003 6.5, [Ca2+] > 4 mg/L, DOC > 2 mg/Lc) 0.002 mg/L at [CaCO3] = 0 - 120 mg/L; 0.003 mg/L at [CaCO3] =120 - 180 mg/L; 0.004 mg/L at [CaCO3] >180mg/L

d) 0.001 mg/L at [CaCO3] = 0 - 60 mg/L; 0.002 mg/L at [CaCO3] =60 - 120 mg/L; 0.004 mg/L at [CaCO3] =120 -180mg/L; 0.007 mg/L at [CaCO3] > 180mg/L

e) 0.025 mg/L at [CaCO3] = 0 - 60 mg/L; 0.065 mg/L at [CaCO3] =60 - 120 mg/L; 0.110 mg/L at [CaCO3] =120 -180mg/L; 0.150 mg/L at [CaCO3] > 180mg/L

Table B-1: Summary of Supernatant Test Results

General Chemistry Analysis, Total and Dissolved Metals (mg/L)


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Year Year 6 - 7 Year 8 Year 9 Year 10 Year 11 Year 12 Year 13ys ca es s

pH (pH units) 7.00 7.00 7.00 7.00 7.00 7.00 7.00 A a n ty . . . . . . .Hardness 30837.0 30899.3 30899.3 30899.3 30899.3 30899.3 30899.3

or e . . . . . . .Sulphate 181.3 184.2 184.2 184.2 184.2 184.2 184.2

u r en s rgan csTotal Ammonia

trateNitrite

ota osp orus . . . . . . rt o-p osp ate

rgan csota rgan c ar onsso ve rgan c ar on

yan esota yan e

o a e a sA um num . . . . . . .Ant mony . . . . . .Arsen c . . . . . .

ar um . . . . . .ery umsmut

oron . . . . . . .

a m um . . . . . . .a c um . . . . . . .rom um . . . . . . .

o a t . . . . . . .opper . . . . . . .

ron . . . . . . .ea . . . . . . .t um . . . . . . .agnes um . . . . . . .anganese . . . . . . . ercuryo y enum . . . . . .c e . . . . . . .

otass um . . . . . . .e en um . . . . . .

con . . . . . . .ver

o um . . . . . . .tront um . . . . . . .

a um . . . . . .

n . . . . . .tan umran um . . . . . .ana um . . . . . .nc . . . . . . .

A va ues n mg un ess ot erw se notes

Table B-3 - West Zone Underground Mine Water with Wall Rock and PAG Input Parameters


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Parameter SewagePhysical Tests

pH (pH units) 7.21Alkalinity 12.5

Hardness 15.4Chloride 3.00Sulphate 4.3

Nutrients / OrganicsTotal Ammonia 10.0000

Nitrate 1.00Nitrite 30.0000Total Phosphorus 1.0000Ortho-phosphate 1.0000

OrganicsTotal Organic Carbon 40Dissolved Organic Carbon 40.00

CyanidesTotal Cyanide 0.0000

Total MetalsAluminum 0.0074Antimony 0.00010Arsenic 0.00016

Barium 0.00218Beryllium 0.00050Bismuth 0.00050Boron 0.010Cadmium 0.00005Calcium 4.07Chromium 0.00050Cobalt 0.00010Copper 0.00269Iron 0.030Lead 0.00010Lithium 0.00500Magnesium 1.36Manganese 0.00264Mercury 0.00003Molybdenum 0.00005

Nickel 0.00050Potassium 2.0Selenium 0.00100Silicon 0.200Silver 0.00001Sodium 2.0Strontium 0.00708Thallium 0.00010Tin 0.00326Titanium 0.010Uranium 0.00001Vanadium 0.0010

nc .A va ues n mg un ess ot erw se notes

Table B-5 Sewage Input Parameters


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Table B-6 - NAG Construction Material Predicted Water Quality

Parameter

Physical Tests Jun Jul Aug Sep Oct

Water Temperature 2 10 10 5 2

pH 7.9 7.9 8.1 8.3 8.4

Alkalinity 49.7 45.8 79.5 138.6 161.4Hardness 12.4 8.2 16.7 29.1 91.6

Sulphate 12.0 11.0 20.0 35.0 103.0

Nutrients

Total Phosphate 0.2000 0.2000 0.3000 0.5000 1.6000

Total Metals

Aluminum 0.0670 0.0621 0.1056 0.1904 0.1739

Antimony 0.02600 0.02400 0.04100 0.07300 0.22010

Arsenic 0.00220 0.00200 0.00350 0.00590 0.01770

Barium 0.04900 0.04600 0.06630 0.04390 0.01790

Beryllium 0.00000 0.00000 0.00000 0.00050 0.00070

Bismuth 0.00020 0.00020 0.00030 0.00060 0.00180

Boron 0.133 0.123 0.216 0.384 1.153Cadmium 0.00000 0.00000 0.00010 0.00010 0.00040

Calcium 8.7 8 14 24.4 23.1

Chromium 0.00000 0.00000 0.00100 0.00100 0.00300

Cobalt 0.00000 0.00000 0.00000 0.00100 0.00200

Copper 0.00140 0.00140 0.00270 0.00560 0.01670

Iron 0.000 0.000 0.000 0.000 0.000

Lead 0.00000 0.00000 0.00000 0.00080 0.00140

Lithium 0.00300 0.00200 0.00400 0.00700 0.02200

Magnesium 2.3 2.3 2.3 2.3 2.3

Manganese 0.021 0.02 0.034 0.061 0.1831

Molybdenum 0.00100 0.00100 0.00200 0.00300 0.00900

Nickel 0.00000 0.00000 0.00000 0.00100 0.00200

Potassium 2.1 1.9 3.4 6.0 17.9

Selenium 0 0 0 0.001 0.002

Silicon 2.200 2.100 3.600 6.400 19.200

Silver 0.00000 0.00000 0.00000 0.00000 0.00000

Sodium 0.0 0.0 0.0 0.0 0.0

Strontium 0.02400 0.02200 0.03900 0.07000 0.20910

Thallium 0.00000 0.00000 0.00000 0.00000 0.00000

Tin 0.00000 0.00000 0.00000 0.00100 0.00200

Titanium 0.000 0.000 0.000 0.001 0.002

Uranium 0.00000 0.00000 0.00000 0.00100 0.00300

Vanadium 0.0020 0.0020 0.0039 0.0056 0.0176

Zinc 0.0000 0.0000 0.0010 0.0010 0.0040

All values in mg / L unless otherwise noted

Month

Page 1 of 1


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Table B-9- Ore Storage Pile Predicted Water Quality

Parameter

Physical Tests

Water Temp [c] 2, 10 10, 10, 5, 2

pH (pH units) 4.4 4.4

Alkalinity 1 1Hardness 47.5052 69.1857

Chloride

Nutrients / Organics

Nutrients

Ortho-phosphate

Total Metals

Antimony 0.0001 0.0001

Arsenic 0.00010 0.00020

Barium 0.00930 0.01020

Beryllium 0.00000 0.00000

Bismuth 0.00000 0.00000

Boron 0.01000 0.00990Cadmium 0.00765 0.01097

Calcium 8.800000 12.700000

Chromium 0.0006 0.0007

Cobalt 0.03770 0.05220

Copper 3.93040 4.44590

Iron 0.40300 0.44260

Lead 0.014 0.016

Lithium 0.00500 0.00990

Magnesium 6.20000 9.10000

Manganese 0.3066 0.5357

Mercury 0.00000 0.00000

Nickel 0.020400 0.027600

Potassium 0.20000 0.40000

Selenium 0.0 0.0

Silicon 2.3 3.9

Silver 0.00000 0.00000

Sodium 1.100000 1.400000

Strontium 0.0 0.1

Thallium 0.00010 0.00010

Tin 0.00010 0.00010

Titanium 0.00000 0.00000

Uranium 0.00020 0.00030

Vanadium 0.000000 0.000000

Zinc 2.5283 3.8940


Jun/Jul Aug/Oct

Page 1 of 7


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Parameter

Physical Tests Jun Jul Aug Sep Oct Jun Jul Aug Sep Oct

Water Temp [c] 2 10 10 5 2 2 10 10 5 2

pH (pH units) 7.8 7.7 8 8.2 8.4 8.3 8.2 8.4 8.5 8.7

Alkalinity 35.3 31.3 56.8 99.9 188.9 121.5 113.7 166.3 201.6 400.2Hardness 21.5 20.0 35.1 61.9 132.0 76.1 70.2 107.5 144.0 332.4

Sulphate 15.0 14.0 25.0 44.0 132.0 54.0 50.0 87.0 155.0 465.0

Nutrients

Total Phosphate 0.0000 0.0000 0.0000 0.1000 0.2000 0.1000 0.1000 0.1000 0.2000 0.7000

Total Metals

Aluminum 0.0432 0.0387 0.0665 0.1186 0.2120 0.1461 0.1363 0.1982 0.2227 0.4273

Antimony 0.02200 0.02100 0.03600 0.06400 0.19310 0.07900 0.07300 0.12700 0.22610 0.68010

Arsenic 0.11160 0.10260 0.18020 0.31960 0.95960 0.39120 0.36140 0.63300 1.12490 3.37840

Barium 0.00100 0.00100 0.00200 0.00400 0.01200 0.00500 0.00400 0.00800 0.01310 0.00670

Beryllium 0.00000 0.00000 0.00000 0.00000 0.00030 0.00000 0.00000 0.00030 0.00020 0.00100

Bismuth 0.00010 0.00010 0.00020 0.00030 0.00100 0.00040 0.00040 0.00060 0.00110 0.00340

Boron 0.023 0.021 0.037 0.066 0.198 0.081 0.075 0.131 0.232 0.698Cadmium 0.00000 0.00000 0.00000 0.00010 0.00020 0.00010 0.00010 0.00010 0.00020 0.00060

Calcium 4.5 4.2 7.3 12.9 16.9 15.8 14.6 19.3 15.6 6.8

Chromium 0.00000 0.00000 0.00000 0.00000 0.00100 0.00000 0.00000 0.00100 0.00100 0.00300

Cobalt 0.00000 0.00000 0.00100 0.00100 0.00300 0.00100 0.00100 0.00200 0.00300 0.01000

Copper 0.00130 0.00130 0.00180 0.00330 0.01270 0.00420 0.00410 0.00880 0.01430 0.04750

Iron 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000

Lead 0.00000 0.00000 0.00000 0.00000 0.00060 0.00050 0.00000 0.00070 0.00120 0.00340

Lithium 0.00100 0.00100 0.00200 0.00300 0.01000 0.00400 0.00400 0.00700 0.01200 0.03610

Magnesium 2.5 2.3 4.1 7.2 21.8 8.9 8.2 14.4 25.5 76.6

Manganese 0.004 0.003 0.006 0.011 0.032 0.013 0.012 0.021 0.037 0.1122

Molybdenum 0.01200 0.01100 0.01900 0.03300 0.09900 0.04100 0.03800 0.06600 0.11710 0.35050

Nickel 0.00300 0.00300 0.00500 0.00790 0.02480 0.00990 0.00890 0.01590 0.02880 0.08640

Potassium 6.5 6.0 10.6 18.8 56.4 23.0 21.2 37.2 66.1 198.6

Selenium 0.006 0.005 0.009 0.016 0.049 0.02 0.019 0.033 0.058 0.1743

Silicon 0.700 0.600 1.100 1.900 5.800 2.400 2.200 3.900 6.900 20.600

Silver 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00100

Sodium 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1

Strontium 0.00800 0.00800 0.01400 0.02400 0.07300 0.03000 0.02700 0.04800 0.08500 0.25640

Thallium 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00100 0.00200

Tin 0.00100 0.00100 0.00100 0.00200 0.00500 0.00200 0.00200 0.00300 0.00600 0.01700

Titanium 0.001 0.001 0.001 0.002 0.005 0.002 0.002 0.003 0.005 0.016

Uranium 0.00000 0.00000 0.00000 0.00000 0.00100 0.00000 0.00000 0.00000 0.00100 0.00200

Vanadium 0.0010 0.0010 0.0010 0.0020 0.0050 0.0020 0.0020 0.0030 0.0060 0.0169

Zinc 0.0010 0.0010 0.0010 0.0019 0.0049 0.0019 0.0019 0.0039 0.0059 0.0186


3m outer shell 1/2 Total volume

Table B-10 - Backfill Stockpile Predicted Water Quality

Page 2 of 7


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Parameter


Water Temp [c] 2 10 10 5 2 2 10 10 5 2

pH (pH units) 8 8 8.2 8.4 8.6 8.3 8.4 8.5 8.7 9

Alkalinity 59.3 55.4 96.9 170.5 305.2 136.6 171.1 216.5 316.9 867.8Hardness 22.2 20.8 36.3 63.3 87.6 50.7 63.5 69.4 90.6 230.5

Sulphate 7.0 7.0 12.0 21.0 61.0 16.0 21.0 36.0 64.0 192.0

Nutrients

Total Phosphate 0.1000 0.1000 0.1000 0.3000 0.8000 0.2000 0.3000 0.5000 0.8000 2.4000

Total Metals

Aluminum 0.0952 0.0875 0.1555 0.2881 0.4879 0.2283 0.2893 0.3492 0.5077 1.4604

Antimony 0.01600 0.01500 0.02600 0.04700 0.14110 0.03700 0.04700 0.08300 0.14810 0.44370

Arsenic 0.00170 0.00090 0.00250 0.00400 0.01030 0.00320 0.00390 0.00590 0.01020 0.03090

Barium 0.01800 0.01700 0.03000 0.05300 0.03020 0.04200 0.05400 0.04570 0.02920 0.01570

Beryllium 0.00000 0.00000 0.00000 0.00000 0.00010 0.00000 0.00000 0.00010 0.00010 0.00100

Bismuth 0.00020 0.00020 0.00030 0.00050 0.00140 0.00040 0.00050 0.00080 0.00150 0.00440

Boron 0.079 0.073 0.127 0.226 0.679 0.178 0.229 0.401 0.713 2.141Cadmium 0.00000 0.00000 0.00010 0.00010 0.00029 0.00010 0.00010 0.00020 0.00029 0.00089

Calcium 5.6 5.2 9.1 15.8 6.4 12.7 15.7 10.8 6.1 1.6

Chromium 0.00000 0.00000 0.00000 0.00100 0.00200 0.00100 0.00100 0.00100 0.00200 0.00600

Cobalt 0.00000 0.00000 0.00000 0.00000 0.00100 0.00000 0.00000 0.00100 0.00100 0.00400

Copper 0.00080 0.00040 0.00130 0.00260 0.00960 0.00190 0.00260 0.00510 0.00970 0.03980

Iron 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000

Lead 0.00000 0.00000 0.00000 0.00000 0.00020 0.00000 0.00000 0.00030 0.00020 0.00210

Lithium 0.00200 0.00200 0.00300 0.00500 0.01500 0.00400 0.00500 0.00900 0.01600 0.04910

Magnesium 2 1.9 3.3 5.8 17.4 4.6 5.9 10.3 18.3 55

Manganese 0.009 0.009 0.015 0.027 0.08 0.021 0.027 0.047 0.084 0.1595

Molybdenum 0.00100 0.00100 0.00200 0.00300 0.00900 0.00200 0.00300 0.00500 0.01000 0.02900

Nickel 0.00000 0.00000 0.00100 0.00100 0.00290 0.00100 0.00100 0.00190 0.00290 0.00880

Potassium 4.3 3.9 6.9 12.2 36.7 9.6 12.4 21.7 38.6 115.8

Selenium 0 0 0 0 0.001 0 0 0.001 0.001 0.004

Silicon 1.500 1.400 2.400 4.200 12.600 3.300 4.300 7.500 13.300 39.800

Silver 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00100

Sodium 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.1 0.2

Strontium 0.01600 0.01400 0.02500 0.04500 0.13510 0.03500 0.04600 0.08000 0.14210 0.42560

Thallium 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00100

Tin 0.00000 0.00000 0.00100 0.00100 0.00300 0.00100 0.00100 0.00200 0.00400 0.01100

Titanium 0.001 0.001 0.002 0.004 0.012 0.003 0.004 0.007 0.012 0.037

Uranium 0.00000 0.00000 0.00000 0.00000 0.00100 0.00000 0.00000 0.00100 0.00100 0.00400

Vanadium 0.0019 0.0019 0.0036 0.0058 0.0146 0.0043 0.0058 0.0092 0.0152 0.0402

Zinc 0.0019 0.0019 0.0027 0.0044 0.0146 0.0036 0.0044 0.0092 0.0155 0.0488


3m outer shell 1/2 Total volume

Table B-11- D NAG Permanent Predicted Water Quality

Page 3 of 7


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Parameter


Water Temp [c] 2 10 10 5 2 2 10 10 5 2

pH (pH units) 7.9 7.9 8.1 8.3 8.4 8.4 8.4 8.4 8.5 8.7

Alkalinity 49.7 45.8 79.5 138.6 161.4 155.1 153 172.9 210.8 418.8Hardness 12.4 8.2 16.7 29.1 91.6 38.8 35.7 62.5 111.2 334.6

Sulphate 12.0 11.0 20.0 35.0 103.0 75.0 69.0 120.0 214.0 643.0

Nutrients

Total Phosphate 0.2000 0.2000 0.3000 0.5000 1.6000 0.5000 0.5000 0.8000 1.5000 4.4000

Total Metals

Aluminum 0.0670 0.0621 0.1056 0.1904 0.1739 0.1848 0.1854 0.1891 0.2119 0.3905

Antimony 0.02600 0.02400 0.04100 0.07300 0.22010 0.12850 0.11880 0.20790 0.36980 1.11110

Arsenic 0.00220 0.00200 0.00350 0.00590 0.01770 0.28910 0.26730 0.46770 0.83150 2.49740

Barium 0.04900 0.04600 0.06630 0.04390 0.01790 0.02300 0.02460 0.01590 0.01060 0.00570

Beryllium 0.00000 0.00000 0.00000 0.00050 0.00070 0.00020 0.00020 0.00030 0.00060 0.00220

Bismuth 0.00020 0.00020 0.00030 0.00060 0.00180 0.00080 0.00080 0.00130 0.00240 0.00710

Boron 0.133 0.123 0.216 0.384 1.153 0.390 0.360 0.630 1.121 3.369Cadmium 0.00000 0.00000 0.00010 0.00010 0.00040 0.00020 0.00010 0.00030 0.00050 0.00140

Calcium 8.7 8 14 24.4 23.1 21.9 22.1 20 16.7 8

Chromium 0.00000 0.00000 0.00100 0.00100 0.00300 0.00100 0.00090 0.00170 0.00300 0.00890

Cobalt 0.00000 0.00000 0.00000 0.00100 0.00200 0.00160 0.00150 0.00260 0.00450 0.01360

Copper 0.00140 0.00140 0.00270 0.00560 0.01670 0.00840 0.00770 0.01370 0.02460 0.07920

Iron 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000

Lead 0.00000 0.00000 0.00000 0.00080 0.00140 0.00050 0.00050 0.00080 0.00150 0.00500

Lithium 0.00300 0.00200 0.00400 0.00700 0.02200 0.00930 0.00860 0.01500 0.02670 0.08040

Magnesium 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3

Manganese 0.021 0.02 0.034 0.061 0.1831 0.0583 0.0539 0.0944 0.1679 0.1502

Molybdenum 0.00100 0.00100 0.00200 0.00300 0.00900 0.03710 0.03430 0.06010 0.10690 0.32120

Nickel 0.00000 0.00000 0.00000 0.00100 0.00200 0.00720 0.00660 0.01150 0.02050 0.06160

Potassium 2.1 1.9 3.4 6.0 17.9 23.2 21.4 37.5 66.6 200.1

Selenium 0 0 0 0.001 0.002 0.024 0.0222 0.0388 0.0691 0.2074

Silicon 2.200 2.100 3.600 6.400 19.200 7.200 6.700 11.700 20.800 62.300

Silver 0.0000

071116-06mn082-appendix a05 high lake water quality model-135f-it2e

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