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Air Quality Monitoring Program Data Report

Prosperity Mine Site 2010‐2011

Taseko Mines Limited Air Quality Monitoring 2010‐2011

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TableofContents

1 Introduction ................................................................................................................................. 4

2 Methods ...................................................................................................................................... 4 2.1 Air Quality Monitoring Study Design ............................................................................................ 4

2.1.1 Site Locations ........................................................................................................................ 4

2.1.2 Equipment ............................................................................................................................. 4

2.1.3 Sampling ................................................................................................................................ 8

2.1.4 Laboratory Analysis ............................................................................................................... 8

2.2 Dustfall Monitoring Study Design ................................................................................................. 8

2.2.1 Site Locations ........................................................................................................................ 8

2.2.2 Equipment ........................................................................................................................... 11

2.2.3 Sample Collection ................................................................................................................ 13

2.2.4 Laboratory Analysis ............................................................................................................. 14

3 Meteorological Station ............................................................................................................... 14

4 Quality Assurance (QA)/Quality Control (QC) ............................................................................. 14 4.1 Air Quality Sampling .................................................................................................................... 14

4.2 Dustfall Sampling ........................................................................................................................ 14

5 Results ....................................................................................................................................... 15 5.1 Air Quality Monitoring ................................................................................................................ 15

5.1.1 Previous Baseline Studies ................................................................................................... 15

5.1.2 Comparison of 1997/1998 and 2010/2011 Air Quality Monitoring Data ........................... 16

5.2 Dustfall Monitoring ..................................................................................................................... 16

5.2.1 Total Dustfall ....................................................................................................................... 16

5.2.2 Previous Baseline Studies ................................................................................................... 18

5.2.3 Metal Deposition ................................................................................................................. 18

6 Conclusion .................................................................................................................................. 21

REFERENCES ...................................................................................................................................... 22

Appendix 1 – Parameters and Detection Limits

Appendix 2 – Field Sheets A. Air Quality Field Sheet

1. PM Sampling – Field Data Log

2. Set Point Calculation Sheet


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B. Dustfall Field Sheet

1. Field Data Log

Appendix 3. Preparation Procedures A. Office Prep for Air Quality Monitoring

B. Particulate Matter Sampling Routine at Site

D. Dustfall Monitoring Sample Collection Procedure


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1 IntroductionTaseko Mines Limited is a publicly traded mining company based out of Vancouver, British Columbia.

The company’s Prosperity Project, located 125 km west of Williams Lake, BC underwent federal and

provincial environmental assessments in 2009‐2010. In 2010, the company was granted an

Environmental Assessment Certificate by the Province of BC to enable the mine to proceed with

development, while the federal government refused to grant approval, concluding that aspects of the

mine as proposed would result in significant adverse environmental effects. While both the federal and

provincial governments concluded no significant environmental effects to air quality, a commitment of

the provincial environmental certificate was to develop an Air Quality Monitoring program.

In order to collect baseline air quality data prior to any construction or operational activities

commencing at the Prosperity site and for inclusion in an Air Quality and Emissions Monitoring and

Management Plan, Taseko initiated a monitoring program to run for one year from September 2010

through September 2011. The program included baseline dustfall, air quality, and climate data

collection. Dustfall and air quality monitoring sites were identified and confirmed through discussions

with Ministry of Environment (MOE) air quality specialists and stations were established in September

2010. Climate data was already being collected by a meteorological station that was installed in 2006

and data in 2010/2011 was collected from this station.

The three air quality parameters for which data was collected were Total Suspended Particulate (TSP),

PM10, and PM2.5. This document details the study design, equipment used, and lab results.

2 Methods

2.1 AirQualityMonitoringStudyDesign

2.1.1 SiteLocationsDuring discussions with MOE, it was suggested that during construction and operation of the mine, air

quality monitoring stations be located outside of the mine site footprint in the area of likely highest

impact (i.e., the northwest corner of the mine); however, for the pre‐construction period, baseline

information could be collected from other areas which have more ready access, provided that the

sample site has sufficient vegetation coverage so that exposed sediment sources do not interfere with

sampling. Based on these discussions, the air quality station was established at the same location as the

meteorological station, shown in Figure 1. This location was chosen as it was far removed from the

existing road network, had relatively easy access and was well hidden from view so as to minimize the

potential for equipment tampering. The MOE Air Monitoring: Volume 1 Particulate Non‐Continuous

siting guidelines were used as a guide in selecting site locations (BC MOE 2006).

2.1.2 EquipmentDue to the lack of power supply at the site, three MiniVol Portable Air Sampler units (Air Metrics Rev

1.2) were used to concurrently sample TSP, PM10 and PM2.5. These units were battery operated and


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programmed to collect samples over a 24 hour period (midnight to midnight) every 6 days. This schedule

is the minimum sampling endorsed by MOE and is consistent with the Federal National Air Pollution

Surveillance (NAPS) monitoring schedule (BC MOE 1996). A fourth sampler was purchased with an extra

battery pack so that should one of the units fail, it could be quickly replaced with minimal impact to

sample collection.

To ensure sampling units were protected from heavy snowfall and human/animal interference, each

sampler was mounted in a steel box on a 6 foot high tripod. Tripods were designed to protect the

sampling units but allow for unobstructed collection of samples via a hole in the top through which the

filter assembly protruded. Tripods were secured to the ground with long steel spikes. Each box was

locked to prevent vandalism.

There was concern from MOE over the lithium ion battery packs and their ability to function at low

temperatures during the winter months. Airmetrics, the supplier of the MiniVol sampling units,

indicated that the operational temperature for the battery packs was from ‐20°C to 60°C. It was noted at

the beginning of the sampling program that the sample units may not be as effective when

temperatures drop below ‐20°C. Airmetrics advised that during cold snaps, the sampling units may

experience technical difficulties if any moisture is present. During extremely low temperatures, moisture

within the units may cause freezing of the pump diaphragms. Airmetrics recommended that should this

be observed, the pumps be turned on manually and be programmed to shut off 24 hours afterwards.

This would eliminate the possibility of pump components freezing prior to the programmed start time.


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Figure 1. Air Quality and Dustfall Station Locations


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On a couple of occasions during the winter months, it is assumed that cold weather caused the battery

to malfunction (‘low battery error’ discovered upon sample collection) and resulted in shorter or longer

sample periods (i.e. instead of 24 hours, sampling was 16 hours or 29‐34 hours in length). This indicates

either the battery ran out of power prior to completion of the 24 hour sampling period, or the

equipment components froze while the sample was being collected and the equipment failed to turn off

after the 24 hour period, continuing to run until the batteries failed.

Taseko consulted with MOE (pers. communications with Graham Veale) during the study regarding

either shortened or lengthened sampling periods. MOE suggested that samples where 75% of the data

was collected could be analyzed without concern. Therefore, all samples which were collected for 18

hours or longer were submitted for analysis. Any samples collected for a shorter period of time were

discarded and not analyzed.

Figure 2A. Air Quality Monitoring Station Figure 2B. Minivol Sampling Unit Installed


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2.1.3 SamplingIn preparation for sampling, laboratory prepared filter cassettes were mounted in filter holder

assemblies which had been configured to collect TSP, PM2.5 and PM10. Filter cassettes assemblies were

prepared prior to the field visit in a clean environment and transported to the sample location in clean

sealed plastic bags. See Appendix 3.A for Air Quality Preparation Procedures.

The MiniVol TAS is designed to operate at 5 litres per minute (lpm) air flow at ambient conditions. At the

factory, the sampler is calibrated to standard conditions and adjusted to operate at 5lpm at these

conditions. Outside the factory, the sampler must be adjusted to account for the different ambient

temperatures and barometric pressures. At each sampling visit, temperature and air pressure data for

the site was collected and used to calibrate the unit to site conditions. See Appendix 2.A.2 for the Set

Point Calculation sheet.

Once a week, the sampling site was visited to collect the exposed filters, replace the battery packs,

install new filter assemblies and program the units for the next sampling period. See Appendix 3.B for

sampling procedures. Upon returning from the field, exposed filters were removed from the filter holder

assemblies in a clean environment and filters were bagged in preparation for shipment to the lab for

analysis.

2.1.4 LaboratoryAnalysisALS Laboratory Group (ALS) was chosen by Taseko Mines as the lab to conduct analysis of the air quality

samples. ALS is accredited by the Canadian Association for Laboratory Accreditation (CALA). Following

filter exposure and collection, filters were sent monthly to ALS for analysis. Laboratory analysis

determined the gravimetric weight of particulate matter (TSP, PM10 and PM2.5) collected during the 24

hour sampling period. A list of assessed parameters, detection limits and analytical results are provided

in Appendix 1.

2.2 DustfallMonitoringStudyDesignDustfall monitoring had been previously undertaken at 15 locations in the region surrounding the mine

site over a one year period between 1997 and 1998. Additional sampling in 2010/2011 was planned in

order to improve on the existing data set.

2.2.1 SiteLocations In discussions with MOE, several sites were suggested for dustfall stations including along the mine

access road, on the western side of Fish Lake valley on the break between the Taseko River and Fish

Lake, and at locations at the lower northern end of the valley, mid‐valley, and at the southern end of the

valley. Taseko representatives performed a site reconnaissance visit in early August 2010 to identify

suitable sample sites. Seven potential sample sites were identified. Criteria for potential sites included:

Low‐lying (away from crests or ridge lines, etc.) so as to allow for dust collection as a result of

gravity settling,

Open (existing clear cuts with sufficient ground cover or meadows) with trees and other

obstructions that are less than 30° above horizontal viewed from the site location,

No buildings or chimneys in the area, and


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Readily accessible.

The field investigation revealed that no safe year‐round access existed to the west side of the Fish Lake

valley and few existing openings are present in the area. As a result, no dustfall stations could be

situated on the break between Fish Lake and the Taseko River.

A list of potential sample sites were presented to MOE including a site adjacent to the 4500 Road to

monitor baseline dustfall associated with existing road use. MOE suggested moving this site to the

junction of the 4500 Road and Taseko Lake Road or further out on the Taseko Lake Road to collect

baseline dustfall associated with the current use of this road system. This site was considered but the

decision was made to situate the road monitoring station on the 4500 Road, for the following reasons:

Stations should be in close proximity to the mine site footprint so as to capture the direct effects

the mine may have on the immediate surrounding environment.

The 4500 Road currently has limited use and public access will be restricted once construction

commences. As a result, monitoring of baseline conditions and conditions during construction,

operations and closure of the mine can be more directly linked to the use of the access road by

mine traffic.

The Taseko Lake Road is a public road and current uses include forestry, exploration, industrial,

tourism and local residential traffic. Traffic use varies with seasons and types of vehicles, and

there is the potential for public use to substantially increase over coming years irrespective of

the proposed mine. Taseko has no control over use of this road by others or road conditions

(Ministry of Transportation maintained road). As a result, it would be difficult to determine what

component of dustfall is attributable to mining activities rather than road conditions or changes

in traffic patterns due to change in population, tourism, industrial or forestry activities in the

area.

With input from MOE, four dustfall monitoring locations were selected (Figures 3 through 6).

Dustfall Station 1:

Dustfall station 1 is located in a meadow in the valley bottom (see Figure 3), outside the mine footprint.

This area was selected as air quality modeling predicted the poorest air quality would occur in this area

(Taseko Mines 2009 EIS). The station is visible from the Fish Lake access road and as a result, was not

suitable for sampling air quality parameters due to the potential for equipment being vandalized. In the

future, if public access to Fish Lake is restricted, this site may be a good location for ongoing monitoring

of TSP, PM10 and PM2.5 as part of the Air Quality and Emissions Monitoring and Management Plan.

In spite of its high visibility, it was decided this would be a good permanent dustfall monitoring site due

to its close proximity to the proposed open pit. It should be noted that this site is approximately 75 m

from the Fish Lake access road and occasional influence of dust may occur during dry periods. In spite of

its close proximity to the road, this location was considered to be suitable as monitoring began in the

fall, after the driest months of the year, and the road remained muddy and wet into the summer of

2011, limiting the interference due to road related dust.


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Figure 3. Dustfall Station 1 Location

Dustfall Stations 2 and 4:

These two stations are situated in low‐lying areas or depressions in existing re‐vegetated cut blocks.

Both of these stations are well removed from the 4500 Road and are sheltered from traffic related dust

by a swath of standing timber.




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Dustfall Station 3:

Dustfall station 3 is situated adjacent to the 4500 Road. This location was selected as it is located in an

open area partially hidden from view of south bound traffic and is close enough to the road (within 60

m) to capture dust associated with road use.


2.2.2 EquipmentEach dustfall station consists of a fence post pounded in to the ground, onto which a steel pipe and

bracket are fixed. The steel bracket, in which dustfall canisters are inserted, is protected with bird wire

to prevent contamination of the samples. The design of the dustfall station was based on the stations

used at the Gibraltar Mine operation, where dustfall has been monitored for many years and the design

of the stations have been proven effective. See below for dustfall bracket designs and photos of each

station.

Two dustfall canisters prepared by ALS were placed at each station. Sample containers were prepared

with algaecide to prevent algal growth during the summer months and with alcohol to prevent freezing

during the winter. Each station was constructed so that the top of each sample container is at minimum

8 feet above the ground surface and all obstructions were less than 30° above the horizontal.


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Figure 7. Dustfall canisters were designed based on this design from Gibraltar Mines operation

Figure 8. Dustfall canisters installed at the Fish Lake site.


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Figure 9. Four Dustfall Stations installed in 2010.

Dustfall Station 1 (DF1) Dustfall Station 2 (DF2)

Dustfall Station 3 (DF3) Dustfall Station 4 (DF4)

2.2.3 SampleCollectionAt the time of exposure of the dustfall canisters, the condition of the station and canisters as well as the

date and time were recorded. (See Appendix 2.B for the Dustfall Field Data Log.) Sample sites were

visited once a week to ensure adequate water levels are maintained in the dustfall containers. In the

event that water levels were low, de‐ionized water provided by ALS was added to each canister. The

volume of water added was noted on field sheets and provided to ALS. During the winter months, a

mixture of 50% iso‐propyl alcohol and deionized water was used in the canisters to prevent freezing. See

Appendix 3.C for the detailed Dustfall Monitoring Procedure.

Canisters were collected and replaced with new samples once a month. Exposed canisters were shipped

to ALS for analysis. See Appendix 3.D for the detailed Dustfall Sample Collection Procedure.


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2.2.4 LaboratoryAnalysisAnalysis of the dustfall samples were conducted by ALS and included fixed, volatile, and total dustfall

and an ICPMS scan for metals.

A list of assessed parameters, detection limits and analytical results are provided in Appendix 1.

2.3 MeteorologicalStationA meteorological station was installed on the site in 2006. The station is located in a cut block at the

same sample location as the MiniVol air samplers used to collect baseline air quality data. This site is

labeled ‘AQ’ on Figure 1. Collections of precipitation (rainfall only), temperature, relative humidity, wind

speed and direction, and solar radiation have been ongoing since 2006 and are managed for Taseko

Mines by Knight Piesold Consulting. Meteorological data is not summarized or discussed in this report.

3 QualityAssurance(QA)/QualityControl(QC)

3.1 AirQualitySamplingInspections of the Air Quality stations consisted of an internal performance check of each unit at each

sample collection and filter changeover. This check included a visual inspection of the unit, a check of

the flow controller to ensure flow was being maintained, confirmation of the correct time and date as

well as confirmation of correct sampling date and duration. See Appendix 3.B for the sampling

procedures. Additionally at each sampling visit, temperature and air pressure data for the site was

collected and used to calibrate the MiniVol TAS units to current site conditions. See Appendix 2.A.2 for

the Set Point Calculation sheet.

One travel blank was collected and analyzed for the air quality samples. Other travel blanks which were

collected had to be discarded due to contamination and/or human errors in collection. This has been

identified as a deficiency during the study. For future studies, it is recommended that all personnel

collecting samples understand and are trained on the importance of proper collection and use of travel

blanks. A further recommendation for air quality sampling quality control, considering Taseko has

purchased a fourth Minivol unit, would be to install and run the extra unit in order to have replicate

results for analysis and in case of errors.

3.2 DustfallSamplingQA of the Dustfall stations consisted of a visual inspection at each site visit. This inspection included a

visual check of the condition of the dustfall stand, a check of each dustfall canister and its contents (i.e.

frozen, insects or debris, etc.), a check of the water level in the canister and any other comments that

related to the canister and its condition (i.e. cracks, etc.). A photograph of the dustfall station was taken

at each site visit. See Appendix 3.C for the Dustfall Monitoring procedure.

Field blanks were collected concurrently with each dustfall canister collection. During the non‐winter

months, deionized water was used in the field blanks. In the winter months, a mixture of iso‐propyl


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alcohol was used in the field blanks to reflect the solution that was used in the dustfall canisters. On a

few occasions, duplicate field blanks were collected and analyzed.

When ALS analyzed the dustfall canisters, the field blanks were used to calibrate the detection limits

when higher than expected levels of metals were found. For example, during the winter months, ALS

instructed Taseko to use an iso‐propyl alcohol solution in the canisters instead of water to prevent the

canisters from freezing. These first iso‐propyl alcohol samples were found to be high in some metals

when analyzed, which resulted in ALS suggesting a 50% iso‐propyl alcohol:deionized water solution be

used to prevent these unusual results and still prevent freezing. Late 2010 and early 2011 dustfall

samples required the lab to adjust their detection limits to address these issues. There were also a few

occasions where the field blanks were found to be contaminated and the resulting detection limits were

raised during analysis based on the results of the field blank.

Duplicate samples at each dustfall collection site were also collected monthly on a rotating schedule,

resulting in a duplicated being collected at each sample site every four months during the 12 month

program.

Following the first month of sample collection and analysis of air quality and dustfall samples, results

from ALS were provided to MOE to review and ensure the data being collected was appropriate for the

Air Quality and Emissions Monitoring Plan for the project area. MOE confirmed that the results fell into

the expected range of volumes for a somewhat undisturbed site. (G. Veale personal communication,

December 1, 2010)

4 Results

4.1 AirQualityMonitoring

During analysis of air quality data collected during the program, it was discovered that that detection

limits for all three species were systematically high throughout the monitoring period. The percent of

data that were above the detection limit for TSP, PM10 and PM2.5 are 34%, 22% and 27%, respectively. In

this relatively undisturbed region this creates a strong bias towards high measured concentrations, and

does not report low concentration data. As a result, the air quality data are of limited use and have been

discounted for this work.

4.1.1 PreviousBaselineStudiesPrevious to the air quality monitoring conducted in 2010‐2011, ground‐level PM10 concentrations were

monitored for the Prosperity Mine project for one year, from August 2, 1997 to September 2, 1998, on a

rotational six‐day schedule using a Partisol 2000 PM10 sampler. See Figure 1 for locations of sampling

stations during the 1997‐98 study. During this monitoring period, all measurements were below the

provincial regulatory objective for 24‐hour PM10 of 50 µg/m3. A maximum 24‐hour PM10 concentration

of 49.1 µg/m3 was measured in November 1997, however, this measured value was suspicious in that it

was not likely for the time of year and was therefore removed from the analysis (Taseko Mines April

2007). The 1997/1998 results were presented by season, with the maximum observed concentrations


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occurring most frequently during the summer months. It was assumed that during the winter months,

snow cover restricted the generation of wind‐blown dust from the ground surface. (Taseko Mines April

2007)

4.1.2 Comparisonof1997/1998and2010/2011AirQualityMonitoringDataA comparison of TSP, PM10 and PM2.5 could not be made as the 2010/2011 data were not suited for

analysis.

4.2 DustfallMonitoringDustfall analysis for total, volatile, and fixed dustfall and metal deposition are summarized below.

4.2.1 TotalDustfallDuring the dustfall monitoring study, maximum dustfall deposition ranged from 0.38 mg/dm2/d to 1.69

mg/dm2/d with average dustfall deposition ranging from 0.16 mg/dm2/d to 0.33 mg/dm2/d. The BC

pollution control objectives list the maximum acceptable dustfall rates for mining activity at 2.9

mg/dm2/day (BC MOE 1979). All dustfall samples fall well below this acceptable pollution control value.

A maximum total dustfall value of 1.69 mg/dm2/day was measured at DF1 in September 2011. This

station, DF1, also had the highest average value among the four stations of 0.33 mg/dm2/day. Station

DF1 was located in close vicinity (75 m) to the Fish Lake access road which was identified during study

design as having the potential to show greater dust levels than the other three stations and the results

show this to be the case. Results of total dustfall sampling at the four stations are summarized in Figure

12.

To further explore the results of the dustfall sampling, the data from the 4 stations was plotted by

season (winter, spring, summer and fall) and shown in Figure 14. In winter and spring, total dustfall

results were lowest, ranging from 0.11 – 0.18 mg/dm2/day in winter and from 0.03 – 0.16 mg/dm2/day

in spring. Summer saw the ranges increasing from 0.20‐0.28 mg/dm2/day with fall ranges at the highest

at 0.16‐0.78 mg/dm2/day. Dustfall deposition ranges in the Cariboo region are expected to be lower in

winter due to snow cover and in spring due to high precipitation levels. The dry summer season typically

has the highest dustfall deposition levels. The summer of 2011 in the Cariboo region was an especially

wet summer and both the fall of 2010 and the fall of 2011 (of which the fall average dustfall results are

based) were dry. These weather patterns could be linked to the dustfall deposition results observed at

the Fish Lake site; however, with only one year’s worth of air quality data and without considering

meteorological data from the project site it is difficult to make these connections.


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Figure 12. Total Dustfall September 2010‐2011

Figure 13 – Summary of Monitoring for Total Dustfall Deposition in 2010/2011

0.00

0.20

0.40

0.60

0.80

1.00

1.20

1.40

1.60

1.80

Total D

ustfall (m

g/dm2/day)

DF1

DF2

DF3

DF4

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

Winter Spring Summer Fall

Dustfall Deposition

(mg/dm

2/day)

Dustfall Station 1

Total Dustfall

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9


Dustfall Deposition

(mg/dm

2/day)

Dustfall Station 2

Total Dustfall

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

Winter Spring Summer FallDustfall Deposition (mg/dm

2/day)

Dustfall Station 3

Total Dustfall

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9


Dustfall Deposition (mg/dm

2/day)

Dustfall Station 4

Total Dustfall


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4.2.2 PreviousBaselineStudiesPrevious to the dustfall monitoring conducted in 2010/2011, a dustfall monitoring program was in place

at the Prosperity project site in 1997/1998. A total of 15 dustfall monitoring sites were established and

dustfall deposition was monitored and analyzed for a variety of metal species. Samples were collected

and analyzed once per month for a year. During this monitoring, maximum dustfall deposition ranged

from 0.26 mg/dm2/d to 1.3 mg/dm2/d and average dustfall deposition ranged from 0.033 mg/dm2/d to

0.2 mg/dm2/d. As at that time there were no current regulatory objectives for dustfall in BC, the

observed depositions were compared to the former BC MOE Ambient Air Quality Objectives (AAQO) for

dustfall, equal to 2.9 mg/dm2/d. The observed levels of dustfall at all the monitoring stations were

below the AAQO limits (Taseko Mines April 2007). The dustfall depositions were broken down by the

season (winter, spring, summer, autumn), with the highest dustfall readings typically observed in the

summer.

4.2.3 MetalDepositionMetal deposition results from the 2010/11 monitoring study are summarized in Table 1. As the project

site is relatively undisturbed, a significant number of the analyzed metals were below the detection limit

or zero. In many cases where dustfall values were above the detection limits and above the guidelines,

the field blanks were also found to have elevated levels and thus could be considered as contaminated,

either during sample preparation, the collection process or from foreign materials in the samples (i.e.

insects, debris).

The metal with the greatest number of guideline exceedances was copper which has a guideline of

0.00010 mg/dm2/d. The average copper deposition between the four stations ranged from 0.0001

mg/dm2/d to 0.0005 mg/dm2/d, with a maximum deposition of 0.006 mg/dm2/d. Comparably, in the

1997/98 baseline study, the average deposition of copper ranged from 0.00035 to 0.0006 mg/dm2/d and

the maximum deposition was 0.007 mg/dm2/d.


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Table 1. Summary of Analysis of Metals in Dust Deposition in 2010/2011

Deposition / Detection Limits (mg/dm2/d)

Dustfall 1 Dustfall 2 Dustfall 3 Dustfall 4

Average Maximum Average Maximum Average Maximum Average Maximum

Total Dustfall / 0.10 0.33 1.69 0.16 0.47 0.19 0.38 0.17 0.56

Aluminum (Al) / 0.0010

0.000403 0.00115 0.000217 0.000593 0.000477 0.00169 0.000196 0.000778

Antimony (Sb) / 0.0001

0 0 0 0 0.0000001 0.0000014 0 0

Arsenic (As) / 0.0001

0.000117 0.00105 0.000124 0.00116 0.000136 0.0011 0.000134 0.00126

Barium (Ba) / 0.00005

0.0000215 0.00014 0.00001 0.000048 0.0000086 0.0000286 0.0000075 0.0000155

Beryllium (Be) / 0.0005

0 0 0 0 0 0 0 0

Bismuth (Bi) / 0.005 0 0 0 0 0 0 0 0

Boron (B) / 0.01 0.000091 0.00092 0.000068 0.00072 0.000121 0.0005 0.00007 0.000072

Cadmium (Cd) / 0.00005

0 0 0 0 0.00000009 0.00000118 0 0

Calcium (Ca) / 0.02 0.00423 0.0347 0.00121 0.00292 0.00163 0.00406 0.0014 0.00364

Chromium (Cr) / 0.0005

0.0000015 0.000019 0.00000088 0.0000114 0.00000116 0.000015 0.00000259 0.000018

Cobalt (Co) / 0.0001 0 0 0 0 0.00000027 0.0000035 0 0

Copper (Cu) / 0.0001

0.000214 0.000575 0.000143 0.000382 0.000524 0.00566 0.000106 0.000428

Lead (Pb) / 0.00005 0.000008 0.000052 0.000003 0.00001 0.0000045 0.000017 0.00000313 0.0000092

Lithium (Li) / 0.005 0 0 0 0 0 0 0 0

Magnesium (Mg) / 0.005

0.00119 0.00566 0.000572 0.00411 0.00091 0.00408 0.00155 0.0126

Manganese (Mn) / 0.00005

0.0000262 0.0000645 0.000024 0.000108 0.000052 0.000314 0.000028 0.00011


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Deposition / Detection Limits (mg/dm2/d)

Dustfall 1 Dustfall 2 Dustfall 3 Dustfall 4

Average Maximum Average Maximum Average Maximum Average Maximum

Molybdenum (Mo) / 0.0005

0.0000001 0.0000013 0 0 0 0 0.0000014 0.000012

Nickel (Ni) / 0.0004 0 0 0.000004 0.000048 0.0000023 0.000017 0 0

Potassium (K) / 0.05 0.00186 0.0081 0.000937 0.00598 0.00228 0.0119 0.00997 0.104

Selenium (Se) / 0.001

0 0 0 0 0 0 0 0

Silver (Ag) / 0.0001 0.0000001 0.000001 0.0000001 0.0000006 0.0000001 0.0000006 0.00000004 0.00000026

Sodium (Na) /0.05 0.00108 0.0085 0.001067 0.00958 0.00158 0.00669 0.00205 0.0141

Strontium (Sr) / 0.0001

0.000015 0.000084 0.000005 0.000011 0.0000071 0.000016 0.0000064 0.000024

Thallium (Tl) / 0.0001

0 0 0 0 0 0 0 0

Tin (Sn) / 0.0001 0 0 0.000003 0.000037 0.0000064 0.000083 0 0

Uranium (Ur) / 0.00001

0.00000004 0.00000035 0 0 0.00000002 0.0000002 0 0

Vanadium (V) / 0.001

0 0 0 0 0 0 0 0

Zinc (Zn) / 0.001 0.000083 0.00023 0.000069 0.000199 0.000092 0.00036 0.000105 0.000376


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5 ConclusionTaseko Mines has committed to continuing with air quality collection and monitoring upon project

approval. Upon commencement of construction at the site and throughout operations, monitoring will

be initiated and continue as per the Air Quality and Emissions Monitoring and Management Plan

(AQEMMP).


22

REFERENCESAir Metrics, Rev 1.2. MiniVol Tactical Air Sampler (TAS) Operation Manual. www.Airmetrics.com

BC MOE. 1979. Pollution Control Objectives for the Mining, Smelting and Related Industry of British

Columbia. Victoria, BC: British Columbia Ministry of Environment

BC MOE. 1996. Air Monitoring Guidelines: Volume 1 Particulate Non‐continuous. Victoria, BC: British

Columbia Ministry of Environment.

CEAA. July 2010. Report of the Federal Review Panel Established by the Minister of the Environment

Taseko Mines Limited’s Prosperity Gold‐Copper Mine Project. Ottawa, ON: CEAA Reference No. 09‐05‐

44811.

Particle Pollution (PM10) and (PM2.5). 30 August 2010. Available online at:

http://www.airnow.gov/index.cfm?action=aqibasics.particle (Accessed January 2012).

Province of BC. 2009. Air Quality Objectives and Standards for British Columbia and Canada. Available

online at: http://www.bcairquality.ca/reports/pdfs/aqotable.pdf (Accessed January 2012).

Rescan. 2009. Morrison Copper/Gold Project Meteorology and Air Quality Baseline Report. Vancouver,

BC: Rescan Environmental Services Ltd.

Taseko Mines Limited. April 2007. Taseko Prosperity Gold‐Copper Project Environmental Impact

Statement/Application, Volume 4: Physical Environment, Section 2: Climate, Air Quality and Noise

Baseline Technical Data Report (Appendix 4‐2‐A).

Taseko Mines Limited. 2009. Taseko Prosperity Gold‐Copper Project Environmental Impact

Statement/Application Volume 4: Physical Environment.


23

Appendix1–ParametersandDetectionLimitsQuoted Parameters with Detection Limits

Parameter Method Reference Report D.L. Units

Misc. – Field Tests

Air Volume 0 L

Filter ‐ Particulates

Particulate – PM10 BC MOE Methods 50 ug

Particulate – PM2.5 BC MOE Methods 50 ug

Total Particulate WCB Methods 0.060 mg

Dustfall ‐ Particulates

Fixed Dustfall BCMOE Dustfalls 0.10 mg/dm2.day

Total Dustfall BCMOE Dustfalls 0.10 mg/dm2.day

Volatile Dustfall BCMOE Dustfalls 0.10 mg/dm2.day

Dustfall ‐ Metals

Aluminum (Al) – Total EPA 6020A 0.0010 mg/dm2.day

Antimony (Sb) – Total EPA 6020A 0.00010 mg/dm2.day

Arsenic (As) – Total EPA 6020A 0.00010 mg/dm2.day

Barium (Ba) – Total EPA 6020A 0.000050 mg/dm2.day

Beryllium (Be) – Total EPA 6020A 0.00050 mg/dm2.day

Bismuth (Bi) – Total EPA 6020A 0.00050 mg/dm2.day

Boron (B) – Total EPA 6020A 0.010 mg/dm2.day

Cadmium (Cd) – Total EPA 6020A 0.000050 mg/dm2.day

Calcium (Ca) – Total EPA 6020A 0.020 mg/dm2.day

Chromium (Cr) – Total EPA 6020A 0.00050 mg/dm2.day

Cobalt (Co) – Total EPA 6020A 0.00010 mg/dm2.day

Copper (Cu) – Total EPA 6020A 0.00010 mg/dm2.day

Interval EPA 6020A 1 days

Lead (Pb) – Total EPA 6020A 0.000050 mg/dm2.day

Lithium (Li) – Total EPA 6020A 0.0050 mg/dm2.day

Magnesium (Mg) – Total EPA 6020A 0.0050 mg/dm2.day

Manganese (Mn) – Total EPA 6020A 0.000050 mg/dm2.day

Molybdenum (Mo) – Total EPA 6020A 0.000050 mg/dm2.day

Nickel (Ni) – Total EPA 6020A 0.00050 mg/dm2.day

Potassium (K) – Total EPA 6020A 0.050 mg/dm2.day

Selenium (Se) – Total EPA 6020A 0.0010 mg/dm2.day

Silver (Ag) – Total EPA 6020A 0.000010 mg/dm2.day

Sodium (Na) – Total EPA 6020A 0.050 mg/dm2.day

Strontium (Sr) – Total EPA 6020A 0.00010 mg/dm2.day

Thallium (Tl) – Total EPA 6020A 0.00010 mg/dm2.day

Tin (Sn) – Total EPA 6020A 0.00010 mg/dm2.day

Uranium (U) – Total EPA 6020A 0.000010 mg/dm2.day

Vanadium (V) – Total EPA 6020A 0.0010 mg/dm2.day

Zinc (Zn) – Total EPA 6020A 0.0010 mg/dm2.day


24

Appendix A.1 2010/2011 Air Quality and Dust Monitoring Data

ProjectReport To Sonia Meili, TASEKO MINES LIMITEDALS File No. L949717Date Received 02-Nov-10 09:00Date 25-Nov-10

RESULTS OF ANALYSIS

Sample ID DF1A DF1BDF1 FIELD BLANK A

DF1 FIELD BLANK B DF2A DF2B DF3A DF3B DF4A DF4B

TRAVEL BLANK AQ1-1 AQ2-1 AQ3-1 AQ1-2 AQ2-2 AQ3-2 AQ1-3 AQ2-3 AQ3-3 AQ1-4 AQ2-4 AQ3-4 AQ1-5 AQ2-5 AQ3-5

Date Sampled 29-OCT-10 29-OCT-10 29-Oct-10 29-Oct-10 29-OCT-10 29-OCT-10 29-OCT-10 29-OCT-10 29-Oct-10 29-Oct-10 4-Oct-10 4-Oct-10 4-Oct-10 4-Oct-10 10-OCT-10 10-OCT-10 10-Oct-10 16-OCT-10 16-OCT-10 16-Oct-10 22-Oct-10 22-Oct-10 22-Oct-10 28-Oct-10 28-Oct-10 28-Oct-10

Time Sampled 13:00 13:00 13:00 13:00 11:20 11:20 11:00 11:00 10:00 10:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 13:00

ALS Sample ID L949717-1 L949717-2 L949717-3 L949717-4 L949717-5 L949717-6 L949717-7 L949717-8 L949717-9 L949717-10L949717-

11L949717-

12L949717-

13L949717-

14L949717-

15L949717-

16L949717-

17L949717-

18L949717-

19L949717-

20L949717-

21L949717-

22L949717-

23L949717-

24L949717-

25L949717-

26

Matrix Dustfall Dustfall Dustfall Dustfall Dustfall Dustfall Dustfall Dustfall Dustfall Dustfall Misc. Misc. Misc. Misc. Misc. Misc. Misc. Misc. Misc. Misc. Misc. Misc. Misc. Misc. Misc. Misc.

Field Tests

Air volume - - - - - - - - - - 0 6300 7560 7560 6300 7560 6480 6120 7560 6300 6480 7200 6300 6480 6840 6840

Particulates

Particulate - PM2.5 - - - - - - - - - - - - - <50 - - <50 - - <50 - - 50 - - <50

Particulate - PM2.5 - - - - - - - - - - - - - <6.6 - - <7.7 - - <7.9 - - 7.9 - - <7.3

Particulate - PM10 - - - - - - - - - - - - <50 - - <50 - - <50 - - <50 - - <50 -

Particulate - PM10 - - - - - - - - - - - - <6.6 - - <6.6 - - <6.6 - - <6.9 - - <7.3 -

Total Suspended Particulate - - - - - - - - - - <50 <50 - - <50 - - <50 - - <50 - - <50 - -

Total Suspended Particulate - - - - - - - - - - <7.9 <7.9 - - <7.9 - - <8.2 - - <7.7 - - <7.7 - -

Fixed Dustfall <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 - - - - - - - - - - - - - - - -

Volatile Dustfall 0.66 0.33 <0.10 <0.10 0.32 <0.10 0.33 0.25 <0.10 <0.10 - - - - - - - - - - - - - - - -

Total Dustfall 0.76 0.37 0.19 <0.10 0.33 0.26 0.34 0.26 0.21 0.13 - - - - - - - - - - - - - - - -

Metals

Aluminum (Al)-Total 0.000573 0.000520 0.000508 <0.00012 0.000309 0.000342 0.000567 0.000702 0.000309 0.000539 - - - - - - - - - - - - - - - -

Antimony (Sb)-Total <0.0000017 <0.0000018 <0.0000040 <0.0000040 <0.0000018 <0.0000018 <0.0000017 <0.0000017 <0.0000021 <0.0000021 - - - - - - - - - - - - - - - -

Arsenic (As)-Total <0.0000017 <0.0000018 <0.0000040 <0.0000040 0.0000022 <0.0000018 <0.0000017 <0.0000017 <0.0000021 <0.0000021 - - - - - - - - - - - - - - - -

Barium (Ba)-Total 0.000141 0.00000748 0.0000250 0.0000060 0.00000772 0.0000112 0.00000928 0.00000921 0.0000092 0.0000408 - - - - - - - - - - - - - - - -

Beryllium (Be)-Total <0.0000087 <0.0000092 <0.000020 <0.000020 <0.0000092 <0.0000092 <0.0000084 <0.0000087 <0.000010 <0.000010 - - - - - - - - - - - - - - - -

Bismuth (Bi)-Total <0.0000087 <0.0000092 <0.000020 <0.000020 <0.0000092 <0.0000092 <0.0000084 <0.0000087 <0.000010 <0.000010 - - - - - - - - - - - - - - - -

Boron (B)-Total <0.00017 <0.00018 0.00054 <0.00040 <0.00018 <0.00018 <0.00017 <0.00017 <0.00021 <0.00021 - - - - - - - - - - - - - - - -

Cadmium (Cd)-Total <0.00000087 <0.00000092 <0.0000020 <0.0000020 <0.00000092 <0.00000092 <0.00000084 <0.00000087 <0.0000010 <0.0000010 - - - - - - - - - - - - - - - -

Calcium (Ca)-Total 0.0347 0.00106 0.00704 0.00098 0.00092 0.00138 0.00115 0.00172 0.00119 0.00167 - - - - - - - - - - - - - - - -

Chromium (Cr)-Total <0.0000087 <0.0000092 <0.000020 <0.000020 <0.0000092 <0.0000092 <0.0000084 <0.0000087 <0.000010 0.000014 - - - - - - - - - - - - - - - -

Cobalt (Co)-Total <0.0000017 <0.0000018 <0.0000040 <0.0000040 <0.0000018 <0.0000018 <0.0000017 <0.0000017 <0.0000021 <0.0000021 - - - - - - - - - - - - - - - -

Copper (Cu)-Total 0.0000238 0.0000130 0.0000383 0.0000180 0.0000197 0.0000175 0.0000609 0.0000188 0.0000172 0.0000151 - - - - - - - - - - - - - - - -

Lead (Pb)-Total <0.00000087 0.00000105 0.0000074 <0.0000020 0.00000368 0.00000128 0.00000310 0.00000148 <0.0000010 0.0000017 - - - - - - - - - - - - - - - -

Lithium (Li)-Total <0.000087 <0.000092 <0.00020 <0.00020 <0.000092 <0.000092 <0.000084 <0.000087 <0.00010 <0.00010 - - - - - - - - - - - - - - - -

Magnesium (Mg)-Total 0.00566 0.000261 0.00109 <0.00020 0.000166 0.000205 0.000376 0.000309 0.00018 0.00028 - - - - - - - - - - - - - - - -

Manganese (Mn)-Total 0.0000645 0.0000262 0.0000367 0.0000176 0.0000197 0.0000294 0.0000304 0.0000289 0.0000631 0.0000220 - - - - - - - - - - - - - - - -

Molybdenum (Mo)-Total <0.00000087 <0.00000092 <0.0000020 <0.0000020 <0.00000092 <0.00000092 <0.00000084 <0.00000087 <0.0000010 <0.0000010 - - - - - - - - - - - - - - - -

Nickel (Ni)-Total <0.0000087 <0.0000092 <0.000020 <0.000020 0.0000479 0.0000482 0.0000130 0.0000280 <0.000010 <0.000010 - - - - - - - - - - - - - - - -

Potassium (K)-Total 0.00215 0.00120 0.0038 <0.0020 <0.00092 <0.00092 0.00162 <0.00087 0.0012 <0.0010 - - - - - - - - - - - - - - - -

Selenium (Se)-Total <0.000017 <0.000018 <0.000040 <0.000040 <0.000018 <0.000018 <0.000017 <0.000017 <0.000021 <0.000021 - - - - - - - - - - - - - - - -

Silver (Ag)-Total 0.00000096 <0.00000018 <0.0000016 <0.00000040 <0.00000018 <0.00000018 <0.00000017 <0.00000017 <0.00000021 <0.00000021 - - - - - - - - - - - - - - - -

Sodium (Na)-Total 0.00115 <0.00092 0.0032 <0.0020 <0.00092 <0.00092 <0.00084 0.00113 <0.0010 0.0028 - - - - - - - - - - - - - - - -

Strontium (Sr)-Total 0.0000841 0.0000061 0.0000126 0.0000046 0.0000043 0.0000058 0.0000055 0.0000073 0.0000084 0.0000065 - - - - - - - - - - - - - - - -

Thallium (Tl)-Total <0.0000017 <0.0000018 <0.0000040 <0.0000040 <0.0000018 <0.0000018 <0.0000017 <0.0000017 <0.0000021 <0.0000021 - - - - - - - - - - - - - - - -

Tin (Sn)-Total <0.0000017 <0.0000018 <0.0000040 <0.0000040 <0.0000018 <0.0000018 <0.0000017 <0.0000017 <0.0000021 <0.0000021 - - - - - - - - - - - - - - - -

Uranium (U)-Total <0.00000017 <0.00000018 <0.00000040 <0.00000040 <0.00000018 <0.00000018 <0.00000017 <0.00000017 <0.00000021 <0.00000021 - - - - - - - - - - - - - - - -

Vanadium (V)-Total <0.000017 <0.000018 <0.000040 <0.000040 <0.000018 <0.000018 <0.000017 <0.000017 <0.000021 <0.000021 - - - - - - - - - - - - - - - -

Zinc (Zn)-Total 0.000092 0.000075 0.000181 0.000113 0.000088 0.000110 0.000105 0.000157 0.000077 0.000121 - - - - - - - - - - - - - - - -

ProjectReport To Sonia Meili, TASEKO MINES LIMITEDALS File No. L963812Date Received 17-Dec-10 09:00Date 04-Jan-11

RESULTS OF ANALYSIS

Sample ID DF1 DF2 DF2 FIELD BLANK A DF3 DF4 AQ1-6 AQ2-6 AQ3-6 AQ1-7 AQ2-7 AQ3-7 AQ1-8 AQ2-8 AQ3-8 AQ2-9 AQ3-9 AQ1-10 AQ2-10 AQ3-10

Date Sampled 02-DEC-10 02-DEC-10 02-DEC-10 02-DEC-10 02-DEC-10 02-DEC-10 03-NOV-10 03-NOV-10 03-NOV-10 09-NOV-10 09-NOV-10 15-NOV-10 15-NOV-10 15-NOV-10 23-NOV-10 23-NOV-10 27-NOV-10 27-NOV-10 27-NOV-10

Time Sampled 15:00 14:30 14:30 13:45 13:15 15:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 15:00 15:00 15:00

ALS Sample ID L963812-1 L963812-3 L963812-5 L963812-7 L963812-9 L963812-11 L963812-12 L963812-13 L963812-14 L963812-15 L963812-16 L963812-17 L963812-18 L963812-19 L963812-20 L963812-21 L963812-22 L963812-23 L963812-24

Matrix Dustfall Dustfall Dustfall Dustfall Dustfall Misc. Filter Filter Misc. Filter Filter Misc. Filter Filter Filter Filter Filter Filter Filter

Field Tests

Air volume - - - - - 6480 6660 6660 6480 6480 6480 6480 6840 6480 6420 5610 - - -

Particulates

Particulate - PM2.5 - - - - - - - 60 - - <50 - - <50 - 100 - - <50

Particulate - PM2.5 - - - - - - - 9.0 - - <7.7 - - <7.7 - 17.8 - - -

Particulate - PM10 - - - - - - <50 - - <50 - - <50 - <50 - - <50 -

Particulate - PM10 - - - - - - <7.5 - - <7.7 - - <7.3 - <7.8 - - - -

Total Suspended Particulate - - - - - <50 - - <50 - - <50 - - - - 87 - -

Total Suspended Particulate - - - - - <7.7 - - <7.7 - - <7.7 - - - - - - -

Fixed Dustfall <0.10 <0.10 <0.10 <0.10 <0.10 - - - - - - - - - - - - - -

Volatile Dustfall <0.10 <0.10 <0.10 <0.10 <0.10 - - - - - - - - - - - - - -

Total Dustfall 0.35 0.17 0.14 <0.10 <0.10 - - - - - - - - - - - - - -

Metals

Aluminum (Al)-Total <0.00026 <0.00019 <0.00017 0.00032 <0.00032 - - - - - - - - - - - - - -

Antimony (Sb)-Total <0.000026 <0.000019 <0.000017 <0.000020 <0.000032 - - - - - - - - - - - - - -

Arsenic (As)-Total <0.000026 <0.000019 <0.000017 <0.000020 <0.000032 - - - - - - - - - - - - - -

Barium (Ba)-Total <0.000013 <0.0000095 <0.0000086 <0.0000098 <0.000016 - - - - - - - - - - - - - -

Beryllium (Be)-Total <0.00013 <0.000095 <0.000086 <0.000098 <0.00016 - - - - - - - - - - - - - -

Bismuth (Bi)-Total <0.00013 <0.000095 <0.000086 <0.000098 <0.00016 - - - - - - - - - - - - - -

Boron (B)-Total <0.0026 <0.0019 <0.0017 <0.0020 <0.0032 - - - - - - - - - - - - - -

Cadmium (Cd)-Total <0.000013 <0.0000095 <0.0000086 <0.0000098 <0.000016 - - - - - - - - - - - - - -

Calcium (Ca)-Total <0.0051 <0.0038 <0.0034 <0.0039 <0.0065 - - - - - - - - - - - - - -

Chromium (Cr)-Total <0.00077 <0.00076 <0.00051 <0.00059 <0.00016 - - - - - - - - - - - - - -

Cobalt (Co)-Total <0.000026 <0.000019 <0.000017 <0.000020 <0.000032 - - - - - - - - - - - - - -

Copper (Cu)-Total <0.000026 <0.000019 <0.000017 <0.000020 <0.000032 - - - - - - - - - - - - - -

Lead (Pb)-Total <0.000013 <0.0000095 <0.0000086 <0.0000098 <0.000016 - - - - - - - - - - - - - -

Lithium (Li)-Total <0.0013 <0.00095 <0.00086 <0.00098 <0.0016 - - - - - - - - - - - - - -

Magnesium (Mg)-Total <0.0013 <0.00095 <0.00086 <0.00098 <0.0016 - - - - - - - - - - - - - -

Manganese (Mn)-Total <0.000013 0.000108 0.0000430 0.0000770 <0.000016 - - - - - - - - - - - - - -

Molybdenum (Mo)-Total <0.000013 <0.0000095 <0.0000086 <0.0000098 <0.000016 - - - - - - - - - - - - - -

Nickel (Ni)-Total <0.00013 <0.000095 <0.000086 <0.000098 <0.00016 - - - - - - - - - - - - - -

Potassium (K)-Total <0.013 <0.0095 <0.0086 <0.0098 <0.016 - - - - - - - - - - - - - -

Selenium (Se)-Total <0.00026 <0.00019 <0.00017 <0.00020 <0.00032 - - - - - - - - - - - - - -

Silver (Ag)-Total <0.0000026 <0.0000019 <0.0000017 <0.0000020 <0.0000032 - - - - - - - - - - - - - -

Sodium (Na)-Total <0.013 <0.0095 <0.0086 <0.0098 <0.016 - - - - - - - - - - - - - -

Strontium (Sr)-Total <0.000026 <0.000019 <0.000017 <0.000020 <0.000032 - - - - - - - - - - - - - -

Thallium (Tl)-Total <0.000026 <0.000019 <0.000017 <0.000020 <0.000032 - - - - - - - - - - - - - -

Tin (Sn)-Total <0.000026 <0.000019 <0.000017 <0.000020 <0.000032 - - - - - - - - - - - - - -

Uranium (U)-Total <0.0000026 <0.0000019 <0.0000017 <0.0000020 <0.0000032 - - - - - - - - - - - - - -

Vanadium (V)-Total <0.00026 <0.00019 <0.00017 <0.00020 <0.00032 - - - - - - - - - - - - - -

Zinc (Zn)-Total <0.00026 <0.00019 <0.00017 <0.00020 <0.00032 - - - - - - - - - - - - - -

ProjectReport To Sonia Meili, TASEKO MINES LIMITEDALS File No. L974679Date Received 01-Feb-11 08:15Date 10-Feb-11

RESULTS OF ANALYSIS

Sample ID DF1 DF2 DF3 FIELD

BLANK DF3 DF4 AQ1-11 AQ2-11 AQ3-11 AQ1-12 AQ2-12 AQ3-12 AQ1-13 AQ2-13 AQ3-13 AQ1-14 AQ2-14 AQ3-14 AQ1-15 AQ2-15 AQ3-15

Date Sampled 01-JAN-11 01-JAN-11 01-JAN-11 01-JAN-11 01-JAN-11 03-DEC-10 03-DEC-10 03-DEC-10 09-DEC-10 09-DEC-10 09-DEC-10 15-DEC-10 15-DEC-10 15-DEC-10 21-DEC-10 21-DEC-10 21-DEC-10 27-DEC-10 27-DEC-10 27-DEC-10

Time Sampled 16:15 15:30 15:00 15:00 14:30 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00

ALS Sample ID L974679-1 L974679-2 L974679-3 L974679-4 L974679-5 L974679-6 L974679-7 L974679-8 L974679-9 L974679-10 L974679-11 L974679-12 L974679-13 L974679-14 L974679-15 L974679-16 L974679-17 L974679-18 L974679-19 L974679-20

Matrix Dustfall Dustfall Dustfall Dustfall Dustfall Misc. Filter Filter Misc. Filter Filter Misc. Filter Filter Misc. Filter Filter Misc. Filter Filter

Field Tests

Air volume - - - - - 6660 6840 6840 6840 13338 7020 6840 6840 6840 6840 6840 6840 6840 6840 6840

Particulates

Particulate - PM2.5 - - - - - - - 63 - - <50 - - 87 - - 50 - - <50

Particulate - PM2.5 - - - - - - - 9.3 - - <7.1 - - 12.7 - - 7.3 - - <7.3

Particulate - PM10 - - - - - - <50 - - <50 - - 110 - - <50 - - <50 -

Particulate - PM10 - - - - - - <7.3 - - <3.7 - - 16.1 - - <7.3 - - <7.3 -

Total Suspended Particulate - - - - - 120 - - 67 - - <50 - - 63 - - <50 - -

Total Suspended Particulate - - - - - 18.0 - - 9.7 - - <7.3 - - 9.3 - - <7.3 - -

Fixed Dustfall <0.10 <0.10 <0.10 <0.10 <0.10 - - - - - - - - - - - - - - -

Volatile Dustfall <0.10 <0.10 <0.10 <0.10 0.12 - - - - - - - - - - - - - - -

Total Dustfall 0.36 0.15 0.11 0.14 0.13 - - - - - - - - - - - - - - -

Metals

Aluminum (Al)-Total 0.00115 0.000342 <0.00015 0.000167 0.000184 - - - - - - - - - - - - - - -

Antimony (Sb)-Total <0.0000023 <0.0000018 <0.0000037 <0.0000017 <0.0000021 - - - - - - - - - - - - - - -

Arsenic (As)-Total 0.00105 0.00116 0.000247 0.00110 0.00126 - - - - - - - - - - - - - - -

Barium (Ba)-Total 0.0000128 0.00000574 0.0000022 0.00000388 0.0000096 - - - - - - - - - - - - - - -

Beryllium (Be)-Total <0.000011 <0.0000092 <0.000019 <0.0000086 <0.000011 - - - - - - - - - - - - - - -

Bismuth (Bi)-Total <0.000011 <0.0000092 <0.000019 <0.0000086 <0.000011 - - - - - - - - - - - - - - -

Boron (B)-Total 0.00092 0.00072 0.00042 0.00050 0.00072 - - - - - - - - - - - - - - -

Cadmium (Cd)-Total <0.0000011 <0.00000092 <0.0000019 <0.00000086 <0.0000011 - - - - - - - - - - - - - - -

Calcium (Ca)-Total 0.00374 0.00292 0.00122 0.00250 0.00324 - - - - - - - - - - - - - - -

Chromium (Cr)-Total <0.00091 <0.00077 <0.00011 <0.00043 <0.00075 - - - - - - - - - - - - - - -

Cobalt (Co)-Total <0.0000023 <0.0000018 0.0000073 <0.0000017 <0.0000021 - - - - - - - - - - - - - - -

Copper (Cu)-Total 0.000331 0.000131 0.000112 0.0000521 0.0000695 - - - - - - - - - - - - - - -

Lead (Pb)-Total 0.0000521 <0.00000092 <0.0000019 0.00000093 <0.0000011 - - - - - - - - - - - - - - -

Lithium (Li)-Total <0.00011 <0.000092 <0.00019 <0.000086 <0.00011 - - - - - - - - - - - - - - -

Magnesium (Mg)-Total 0.00484 0.00411 0.00056 0.00232 0.00299 - - - - - - - - - - - - - - -

Manganese (Mn)-Total 0.0000496 0.0000403 0.0000073 0.0000366 0.0000544 - - - - - - - - - - - - - - -

Molybdenum (Mo)-Total 0.0000013 <0.00000092 <0.0000019 <0.00000086 0.0000123 - - - - - - - - - - - - - - -

Nickel (Ni)-Total <0.000011 <0.0000092 <0.000019 <0.0000086 <0.000011 - - - - - - - - - - - - - - -

Potassium (K)-Total <0.0011 <0.00092 <0.0019 0.00143 0.0015 - - - - - - - - - - - - - - -

Selenium (Se)-Total <0.000023 <0.000018 <0.000037 <0.000017 <0.000021 - - - - - - - - - - - - - - -

Silver (Ag)-Total <0.00000023 0.00000056 <0.00000037 <0.00000017 <0.00000021 - - - - - - - - - - - - - - -

Sodium (Na)-Total 0.0085 0.00958 0.0035 0.00669 0.0078 - - - - - - - - - - - - - - -

Strontium (Sr)-Total 0.0000145 0.0000107 0.0000041 0.0000074 0.0000116 - - - - - - - - - - - - - - -

Thallium (Tl)-Total <0.0000023 <0.0000018 <0.0000037 <0.0000017 <0.0000021 - - - - - - - - - - - - - - -

Tin (Sn)-Total <0.0000023 <0.0000018 <0.0000037 <0.0000017 <0.0000021 - - - - - - - - - - - - - - -

Uranium (U)-Total 0.00000035 <0.00000018 <0.00000037 <0.00000017 <0.00000021 - - - - - - - - - - - - - - -

Vanadium (V)-Total <0.000023 <0.000018 <0.000037 <0.000017 <0.000021 - - - - - - - - - - - - - - -

Zinc (Zn)-Total 0.000233 0.000190 0.000059 0.000085 0.000376 - - - - - - - - - - - - - - -

ProjectReport To Sonia Meili, TASEKO MINES LIMITEDALS File No. L977354Date Received 10-Feb-11 08:45Date 24-Feb-11

RESULTS OF ANALYSIS

Sample ID DF1 DF2 DF3 DF4DF2 FIELD

BLANK AQ1-16 AQ2-16 AQ3-16 AQ1-17 AQ2-17 AQ3-17 AQ1-18 AQ2-18 AQ3-18 AQ1-19 AQ2-19 AQ3-19 AQ1-20 AQ2-20 AQ3-20

Date Sampled 02-FEB-11 02-FEB-11 02-FEB-11 02-FEB-11 02-FEB-11 02-JAN-11 02-JAN-11 02-JAN-11 08-JAN-11 08-JAN-11 08-JAN-11 14-JAN-11 14-JAN-11 14-JAN-11 20-JAN-11 20-JAN-11 20-JAN-11 26-JAN-11 26-JAN-11 26-JAN-11

Time Sampled 14:00 14:45 15:15 14:30 14:45 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00



Field Tests

Air volume - - - - - 5580 8835 8521.5 6840 7020 6840 8493 9718.5 9148.5 6940 6660 8325 6840 6840 6840

Particulates

Particulate - PM2.5 - - - - - - - <50 - - <50 - - <50 - - 50 - - <50

Particulate - PM2.5 - - - - - - - <5.9 - - <7.3 - - <5.5 - - 6.0 - - <7.3

Particulate - PM10 - - - - - - <50 - - <50 - - 50 - - <50 - - <50 -

Particulate - PM10 - - - - - - <5.7 - - <7.1 - - 5.1 - - <7.5 - - <7.3 -

Total Suspended Particulate - - - - - 63 - - 87 - - 70 - - <50 - - <50 - -

Total Suspended Particulate - - - - - 11.3 - - 12.7 - - 8.2 - - <7.2 - - <7.3 - -

Fixed Dustfall <0.10 <0.10 <0.10 <0.10 <0.10 - - - - - - - - - - - - - - -

Volatile Dustfall <0.10 <0.10 0.10 <0.10 <0.10 - - - - - - - - - - - - - - -

Total Dustfall <0.10 <0.10 0.20 0.12 <0.10 - - - - - - - - - - - - - - -

Metals

Aluminum (Al)-Total 0.000346 0.000255 0.00169 0.000258 0.000120 - - - - - - - - - - - - - - -

Antimony (Sb)-Total <0.0000020 <0.0000012 0.0000014 <0.0000016 <0.0000033 - - - - - - - - - - - - - - -

Arsenic (As)-Total 0.000225 0.000209 0.000210 0.000224 0.000175 - - - - - - - - - - - - - - -

Barium (Ba)-Total 0.0000452 0.0000477 0.0000286 0.0000112 0.0000072 - - - - - - - - - - - - - - -


Bismuth (Bi)-Total <0.000010 <0.0000062 <0.0000061 <0.0000082 <0.000017 - - - - - - - - - - - - - - -

Boron (B)-Total 0.00026 0.00017 0.00015 0.00019 0.00065 - - - - - - - - - - - - - - -

Cadmium (Cd)-Total <0.0000010 <0.00000062 <0.00000061 <0.00000082 <0.0000017 - - - - - - - - - - - - - - -

Calcium (Ca)-Total 0.00141 0.00263 0.00406 0.00269 0.00124 - - - - - - - - - - - - - - -

Chromium (Cr)-Total 0.000019 0.0000114 0.0000151 0.0000157 0.000037 - - - - - - - - - - - - - - -

Cobalt (Co)-Total <0.0000020 <0.0000012 0.0000035 <0.0000016 <0.0000033 - - - - - - - - - - - - - - -

Copper (Cu)-Total 0.0000286 0.000243 0.00566 0.000428 0.000166 - - - - - - - - - - - - - - -

Lead (Pb)-Total 0.0000035 0.00000275 0.0000170 0.00000544 <0.0000017 - - - - - - - - - - - - - - -

Lithium (Li)-Total <0.00010 <0.000062 <0.000061 <0.000082 <0.00017 - - - - - - - - - - - - - - -

Magnesium (Mg)-Total 0.00071 0.000835 0.00408 0.000869 0.00042 - - - - - - - - - - - - - - -


Molybdenum (Mo)-Total <0.0000010 <0.00000062 <0.00000061 <0.00000082 <0.0000017 - - - - - - - - - - - - - - -

Nickel (Ni)-Total <0.000010 <0.0000062 0.0000171 <0.0000082 <0.000017 - - - - - - - - - - - - - - -

Potassium (K)-Total <0.0010 0.00095 0.00088 <0.00082 <0.0017 - - - - - - - - - - - - - - -


Silver (Ag)-Total 0.00000051 0.00000045 0.00000060 0.00000026 <0.00000033 - - - - - - - - - - - - - - -

Sodium (Na)-Total 0.0012 0.00155 0.00196 0.00134 <0.0017 - - - - - - - - - - - - - - -

Strontium (Sr)-Total 0.0000059 0.0000091 0.0000157 0.0000089 0.0000034 - - - - - - - - - - - - - - -


Tin (Sn)-Total <0.0000020 0.0000372 0.0000834 <0.0000016 <0.0000033 - - - - - - - - - - - - - - -

Uranium (U)-Total <0.00000020 <0.00000012 0.00000024 <0.00000016 <0.00000033 - - - - - - - - - - - - - - -

Vanadium (V)-Total <0.000020 <0.000012 <0.000012 <0.000016 <0.000033 - - - - - - - - - - - - - - -

Zinc (Zn)-Total 0.000229 0.000199 0.000360 0.000135 0.000069 - - - - - - - - - - - - - - -

ProjectReport To Sonia Meili, TASEKO MINES LIMITED

ALS File No. L984136

Date Received 08-Mar-11 08:17

Date 18-Mar-11

RESULTS OF ANALYSIS

Sample ID DF 1A DF 1B DF 2A DF 2B DF 3A DF 3B DF 4A DF 4B

DF 4A FIELD BLANK

DF 4B FIELD BLANK AQ1-21 AQ2-21 AQ3-21 AQ1-22 AQ2-22 AQ3-22 AQ1-23 AQ2-23 AQ3-23 AQ1-24 AQ2-24 AQ3-24 AQ1-25 AQ2-25 AQ3-25

Date Sampled 2-Mar-11 2-Mar-11 2-Mar-11 2-Mar-11 2-Mar-11 2-Mar-11 2-Mar-11 2-Mar-11 2-Mar-11 2-Mar-11 1-Feb-11 1-Feb-11 1-Feb-11 7-Feb-11 7-Feb-11 7-Feb-11 13-FEB-11 13-FEB-11 13-FEB-11 19-FEB-11 19-FEB-11 19-FEB-11 25-FEB-11 25-FEB-11 25-FEB-11

Time Sampled 14:00 14:00 13:30 13:30 15:30 15:30 16:00 16:00 14:00 14:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00

ALS Sample ID L984136-1 L984136-2 L984136-3 L984136-4 L984136-5 L984136-6 L984136-7 L984136-8 L984136-9 L984136-10 L984136-11 L984136-12 L984136-13 L984136-14 L984136-15 L984136-16 L984136-17 L984136-18 L984136-19 L984136-20 L984136-21 L984136-22 L984136-23 L984136-24 L984136-25

Matrix Dustfall Dustfall Dustfall Dustfall Dustfall Dustfall Dustfall Dustfall Dustfall Dustfall Misc. Filter Filter Misc. Filter Filter Misc. Filter Filter Misc. Filter Filter Misc. Filter Filter

Field Tests

Air volume - - - - - - - - - - 6840 6840 6840 6840 6840 6840 6840 7752 6840 6840 6840 6840 6840 6840 6840

Particulates

Particulate - PM2.5 - - - - - - - - - - - - 83 - - 90 - - <50 - - 63 - - <50

Particulate - PM2.5 - - - - - - - - - - - - 12.2 - - 13.2 - - <7.3 - - 9.3 - - <7.3

Particulate - PM10 - - - - - - - - - - - <50 - - 73 - - <50 - - <50 - - <50 -

Particulate - PM10 - - - - - - - - - - - <7.3 - - 10.7 - - <6.4 - - <7.3 - - <7.3 -

Total Suspended Particulate - - - - - - - - - - 80 - - <50 - - <50 - - 80 - - 123 - -

Total Suspended Particulate - - - - - - - - - - 11.7 - - <7.3 - - <7.3 - - 11.7 - - 18.0 - -

Fixed Dustfall <0.11 - <0.11 - <0.11 - <0.11 - <0.11 - - - - - - - - - - - - - - - -

Volatile Dustfall <0.11 - 0.21 - <0.11 - 0.30 - <0.11 - - - - - - - - - - - - - - - -

Total Dustfall <0.11 - 0.25 - <0.11 - 0.30 - <0.11 - - - - - - - - - - - - - - - -

Metals

Aluminum (Al)-Total - <0.00030 - <0.00024 - <0.00023 - <0.00025 - <0.00040 - - - - - - - - - - - - - - -

Antimony (Sb)-Total - <0.000030 - <0.000024 - <0.000023 - <0.000025 - <0.000040 - - - - - - - - - - - - - - -

Arsenic (As)-Total - <0.000030 - <0.000024 - <0.000023 - <0.000025 - <0.000040 - - - - - - - - - - - - - - -

Barium (Ba)-Total - <0.000015 - <0.000012 - <0.000012 - <0.000012 - <0.000020 - - - - - - - - - - - - - - -

Beryllium (Be)-Total - <0.00015 - <0.00012 - <0.00012 - <0.00012 - <0.00020 - - - - - - - - - - - - - - -

Bismuth (Bi)-Total - <0.00015 - <0.00012 - <0.00012 - <0.00012 - <0.00020 - - - - - - - - - - - - - - -

Boron (B)-Total - <0.0030 - <0.0024 - <0.0023 - <0.0025 - <0.0040 - - - - - - - - - - - - - - -

Cadmium (Cd)-Total - <0.000015 - <0.000012 - <0.000012 - <0.000012 - <0.000020 - - - - - - - - - - - - - - -

Calcium (Ca)-Total - <0.0061 - <0.0049 - <0.0046 - <0.0049 - <0.0080 - - - - - - - - - - - - - - -

Chromium (Cr)-Total - <0.00015 - <0.00012 - <0.00012 - <0.00012 - <0.00020 - - - - - - - - - - - - - - -

Cobalt (Co)-Total - <0.000030 - <0.000024 - <0.000023 - <0.000025 - <0.000040 - - - - - - - - - - - - - - -

Copper (Cu)-Total - <0.000030 - 0.000050 - 0.000024 - 0.000111 - <0.000040 - - - - - - - - - - - - - - -

Lead (Pb)-Total - <0.000015 - <0.000012 - <0.000012 - <0.000012 - <0.000020 - - - - - - - - - - - - - - -

Lithium (Li)-Total - <0.0015 - <0.0012 - <0.0012 - <0.0012 - <0.0020 - - - - - - - - - - - - - - -

Magnesium (Mg)-Total - <0.0015 - <0.0012 - <0.0012 - <0.0012 - <0.0020 - - - - - - - - - - - - - - -

Manganese (Mn)-Total - <0.000015 - <0.000012 - <0.000012 - 0.000013 - <0.000020 - - - - - - - - - - - - - - -

Molybdenum (Mo)-Total - <0.000015 - <0.000012 - <0.000012 - <0.000012 - <0.000020 - - - - - - - - - - - - - - -

Nickel (Ni)-Total - <0.00015 - <0.00012 - <0.00012 - <0.00012 - <0.00020 - - - - - - - - - - - - - - -

Potassium (K)-Total - <0.015 - <0.012 - <0.012 - <0.012 - <0.020 - - - - - - - - - - - - - - -

Selenium (Se)-Total - <0.00030 - <0.00024 - <0.00023 - <0.00025 - <0.00040 - - - - - - - - - - - - - - -

Silver (Ag)-Total - <0.0000030 - <0.0000024 - <0.0000023 - <0.0000025 - <0.0000040 - - - - - - - - - - - - - - -

Sodium (Na)-Total - <0.015 - <0.012 - <0.012 - <0.012 - <0.020 - - - - - - - - - - - - - - -

Strontium (Sr)-Total - <0.000030 - <0.000024 - <0.000023 - <0.000025 - <0.000040 - - - - - - - - - - - - - - -

Thallium (Tl)-Total - <0.000030 - <0.000024 - <0.000023 - <0.000025 - <0.000040 - - - - - - - - - - - - - - -

Tin (Sn)-Total - <0.000030 - <0.000024 - <0.000023 - <0.000025 - <0.000040 - - - - - - - - - - - - - - -

Uranium (U)-Total - <0.0000030 - <0.0000024 - <0.0000023 - <0.0000025 - <0.0000040 - - - - - - - - - - - - - - -

Vanadium (V)-Total - <0.00030 - <0.00024 - <0.00023 - <0.00025 - <0.00040 - - - - - - - - - - - - - - -

Zinc (Zn)-Total - <0.00030 - <0.00024 - <0.00023 - <0.00025 - <0.00040 - - - - - - - - - - - - - - -

ProjectReport To Sonia Meili, TASEKO MINES LIMITEDALS File No. L994113Date Received 12-Apr-11 09:41Date 21-Apr-11

RESULTS OF ANALYSIS

Sample ID DF 1A DF 1B DF 2A DF 2B DF 3A DF 3B DF 4A DF 4B

FIELD BLANK A -

DF1

FIELD BLANK B -

DF1 AQ1 - 26 AQ2 - 26 AQ3- 26 AQ1 - 27 AQ2 - 27 AQ3- 27 AQ1- 28 AQ2- 28 AQ3- 28 AQ1- 29 AQ2- 29 AQ3- 29 AQ1- 30 AQ2- 30 AQ3- 30

Date Sampled 3-Apr-11 3-Apr-11 3-Apr-11 3-Apr-11 3-Apr-11 3-Apr-11 3-Apr-11 3-Apr-11 3-Apr-11 3-Apr-11 3-Mar-11 3-Mar-11 3-Mar-11 9-Mar-11 9-Mar-11 9-Mar-11 15-MAR-11 15-MAR-11 15-MAR-11 21-MAR-11 21-MAR-11 21-MAR-11 27-MAR-11 27-MAR-11 27-MAR-11

Time Sampled 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00

ALS Sample ID L994113-1 L994113-2 L994113-3 L994113-4 L994113-5 L994113-6 L994113-7 L994113-8 L994113-9 L994113-10 11 12 13 14 15 16 L994113-17 L994113-18 L994113-19 L994113-20 L994113-21 L994113-22 L994113-23 L994113-24 L994113-26

Matrix Dustfall Dustfall Dustfall Dustfall Dustfall Dustfall Dustfall Dustfall Dustfall Dustfall Misc. Filter Filter Misc. Filter Filter Misc. Filter Filter Misc. Filter Filter Misc. Filter Filter

Field Tests

Air volume - - - - - - - - - - 8664 10915.5 9576 9747 13366.5 11400 6840 6660 6840 6840 6840 6840 6840 6840 6840

Particulates

Particulate - PM2.5 - - - - - - - - - - - - <50 - - <50 - - <50 - - <50 - - 50

Particulate - PM2.5 - - - - - - - - - - - - <5.2 - - <4.4 - - <7.3 - - <7.3 - - 7.3

Particulate - PM10 - - - - - - - - - - - <50 - - <50 - - <50 - - <50 - - <50 -

Particulate - PM10 - - - - - - - - - - - <4.6 - - <3.7 - - <7.5 - - <7.3 - - <7.3 -

Total Suspended Particulate - - - - - - - - - - <50 - - <50 - - <50 - - <50 - - <50 - -

Total Suspended Particulate - - - - - - - - - - <5.8 - - <5.1 - - <7.3 - - <7.3 - - <7.3 - -

Fixed Dustfall <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 - - - - - - - - - - - - - - -

Volatile Dustfall <0.10 <0.10 <0.10 <0.10 0.13 <0.10 0.13 <0.10 <0.10 0.14 - - - - - - - - - - - - - - -

Total Dustfall 0.12 0.13 <0.10 0.11 0.17 <0.10 0.15 <0.10 0.10 0.15 - - - - - - - - - - - - - - -

Metals

Aluminum (Al)-Total <0.00022 <0.00021 <0.00018 <0.00019 0.000343 <0.00018 <0.00022 <0.00023 <0.00037 <0.00037 - - - - - - - - - - - - - - -

Antimony (Sb)-Total <0.000022 <0.000021 <0.000018 <0.000019 <0.0000018 <0.000018 <0.000022 <0.000023 <0.000037 <0.000037 - - - - - - - - - - - - - - -

Arsenic (As)-Total 0.000024 0.000025 0.000024 0.000025 0.000280 0.000026 0.000025 0.000025 <0.000037 <0.000037 - - - - - - - - - - - - - - -

Barium (Ba)-Total <0.000011 <0.000010 <0.0000092 <0.0000093 0.00000798 <0.0000092 <0.000011 <0.000011 <0.000018 <0.000018 - - - - - - - - - - - - - - -

Beryllium (Be)-Total <0.00011 <0.00010 <0.000092 <0.000093 <0.0000088 <0.000092 <0.00011 <0.00011 <0.00018 <0.00018 - - - - - - - - - - - - - - -

Bismuth (Bi)-Total <0.00011 <0.00010 <0.000092 <0.000093 <0.0000088 <0.000092 <0.00011 <0.00011 <0.00018 <0.00018 - - - - - - - - - - - - - - -

Boron (B)-Total <0.0022 <0.0021 <0.0018 <0.0019 0.00030 <0.0018 <0.0022 <0.0023 <0.0037 <0.0037 - - - - - - - - - - - - - - -

Cadmium (Cd)-Total <0.000011 <0.000010 <0.0000092 <0.0000093 <0.00000088 <0.0000092 <0.000011 <0.000011 <0.000018 <0.000018 - - - - - - - - - - - - - - -

Calcium (Ca)-Total <0.0043 <0.0042 <0.0037 <0.0037 0.00205 <0.0037 <0.0045 <0.0046 <0.0074 <0.0074 - - - - - - - - - - - - - - -

Chromium (Cr)-Total <0.00033 <0.00031 <0.00028 <0.00028 <0.000053 <0.00028 <0.00033 <0.00034 <0.00055 <0.00074 - - - - - - - - - - - - - - -

Cobalt (Co)-Total <0.000022 <0.000021 <0.000018 <0.000019 <0.0000018 <0.000018 <0.000022 <0.000023 <0.000037 <0.000037 - - - - - - - - - - - - - - -

Copper (Cu)-Total <0.000022 0.000027 0.000019 <0.000019 0.000262 0.000020 0.000029 <0.000023 <0.000037 <0.000037 - - - - - - - - - - - - - - -

Interval - - - - - - - - - - - - - - - - - - - - - - - - -

Lead (Pb)-Total <0.000011 <0.000010 <0.0000092 <0.0000093 0.00000328 <0.0000092 <0.000011 <0.000011 <0.000018 <0.000018 - - - - - - - - - - - - - - -

Lithium (Li)-Total <0.0011 <0.0010 <0.00092 <0.00093 <0.000088 <0.00092 <0.0011 <0.0011 <0.0018 <0.0018 - - - - - - - - - - - - - - -

Magnesium (Mg)-Total <0.0011 <0.0010 <0.00092 <0.00093 0.000695 <0.00092 <0.0011 <0.0011 <0.0018 <0.0018 - - - - - - - - - - - - - - -

Manganese (Mn)-Total <0.000011 <0.000010 <0.0000092 <0.0000093 0.0000217 <0.0000092 <0.000011 <0.000011 <0.000018 <0.000018 - - - - - - - - - - - - - - -

Molybdenum (Mo)-Total <0.000011 <0.000010 <0.0000092 <0.0000093 <0.00000088 <0.0000092 <0.000011 <0.000011 <0.000018 <0.000018 - - - - - - - - - - - - - - -

Nickel (Ni)-Total <0.00011 <0.00010 <0.000092 <0.000093 <0.0000088 <0.000092 <0.00011 <0.00011 <0.00018 <0.00018 - - - - - - - - - - - - - - -

Potassium (K)-Total <0.011 <0.010 <0.0092 <0.0093 <0.00088 <0.0092 <0.011 <0.011 <0.018 <0.018 - - - - - - - - - - - - - - -

Selenium (Se)-Total <0.00022 <0.00021 <0.00018 <0.00019 <0.000018 <0.00018 <0.00022 <0.00023 <0.00037 <0.00037 - - - - - - - - - - - - - - -

Silver (Ag)-Total <0.0000022 <0.0000021 <0.0000018 <0.0000019 0.00000047 <0.0000018 <0.0000022 <0.0000023 <0.0000037 <0.0000037 - - - - - - - - - - - - - - -

Sodium (Na)-Total <0.011 <0.010 <0.0092 <0.0093 0.00105 <0.0092 <0.011 <0.011 <0.018 <0.018 - - - - - - - - - - - - - - -

Strontium (Sr)-Total <0.000022 <0.000021 <0.000018 <0.000019 0.0000075 <0.000018 <0.000022 <0.000023 <0.000037 <0.000037 - - - - - - - - - - - - - - -

Thallium (Tl)-Total <0.000022 <0.000021 <0.000018 <0.000019 <0.0000018 <0.000018 <0.000022 <0.000023 <0.000037 <0.000037 - - - - - - - - - - - - - - -

Tin (Sn)-Total <0.000022 <0.000021 <0.000018 <0.000019 <0.0000018 <0.000018 <0.000022 <0.000023 <0.000037 <0.000037 - - - - - - - - - - - - - - -

Uranium (U)-Total <0.0000022 <0.0000021 <0.0000018 <0.0000019 <0.00000018 <0.0000018 <0.0000022 <0.0000023 <0.0000037 <0.0000037 - - - - - - - - - - - - - - -

Vanadium (V)-Total <0.00022 <0.00021 <0.00018 <0.00019 <0.000018 <0.00018 <0.00022 <0.00023 <0.00037 <0.00037 - - - - - - - - - - - - - - -

Zinc (Zn)-Total <0.00022 <0.00021 <0.00018 <0.00019 0.000113 <0.00018 <0.00022 <0.00023 <0.00037 <0.00037 - - - - - - - - - - - - - - -

ProjectReport To Sonia Meili, TASEKO MINES LIMITEDALS File No. L1002647Date Received 09-May-11 09:10Date 18-May-11

RESULTS OF ANALYSIS

Sample ID DF 1 DF 2 DF 3 DF 4DF FIELD

BLANKAQ1-31 AQ2-31 AQ3-31 AQ1-32 AQ2-32 AQ3-32 AQ1-33 AQ2-33 AQ3-33 AQ1-34 AQ2-34 AQ3-34 AQ1-35 AQ2-35 AQ3-35

Date Sampled 03-MAY-11 03-MAY-11 03-MAY-11 03-MAY-11 03-MAY-11 02-APR-11 02-APR-11 02-APR-11 08-APR-11 08-APR-11 08-APR-11 14-APR-11 14-APR-11 14-APR-11 20-APR-11 20-APR-11 20-APR-11 26-APR-11 26-APR-11 26-APR-11

Time Sampled 14:00 14:30 15:00 16:00 14:30 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00



Field Tests

Air volume - - - - - 6840 6660 6660 7380 6840 6840 6840 6840 6840 6840 7200 6840 6840 7020 6840

Particulates

Particulate - PM2.5 - - - - - - - <50 - - <50 - - <50 - - <50 - - <50

Particulate - PM2.5 - - - - - - - <7.5 - - <7.3 - - <7.3 - - <7.3 - - <7.3

Particulate - PM10 - - - - - - 70 - - 60 - - <50 - - <50 - - <50 -

Particulate - PM10 - - - - - - 10.5 - - 8.8 - - <7.3 - - <6.9 - - <7.1 -

Total Suspended Particulate - - - - - <50 - - 70 - - <50 - - <50 - - 50 - -

Total Suspended Particulate - - - - - <7.3 - - 9.5 - - <7.3 - - <7.3 - - 7.3 - -

Fixed Dustfall <0.10 <0.10 <0.10 <0.10 <0.10 - - - - - - - - - - - - - - -

Volatile Dustfall <0.10 <0.10 0.15 <0.10 <0.10 - - - - - - - - - - - - - - -

Total Dustfall <0.10 <0.10 0.15 <0.10 0.12 - - - - - - - - - - - - - - -

Metals

Aluminum (Al)-Total 0.000081 0.000072 0.000107 0.000098 <0.00036 - - - - - - - - - - - - - - -


Arsenic (As)-Total 0.000110 0.000111 0.0000900 0.000116 <0.000036 - - - - - - - - - - - - - - -

Barium (Ba)-Total 0.0000133 0.0000165 0.0000105 0.0000146 <0.000018 - - - - - - - - - - - - - - -


Bismuth (Bi)-Total <0.000015 <0.000013 <0.000013 <0.000014 <0.00018 - - - - - - - - - - - - - - -

Boron (B)-Total <0.00029 <0.00027 0.00031 <0.00028 <0.0036 - - - - - - - - - - - - - - -

Cadmium (Cd)-Total <0.0000015 <0.0000013 <0.0000013 <0.0000014 <0.000018 - - - - - - - - - - - - - - -

Calcium (Ca)-Total 0.00137 0.00115 0.00122 0.00095 <0.0071 - - - - - - - - - - - - - - -


Cobalt (Co)-Total <0.0000029 <0.0000027 <0.0000027 <0.0000028 <0.000036 - - - - - - - - - - - - - - -

Copper (Cu)-Total 0.000505 0.000382 0.000124 0.000103 <0.000036 - - - - - - - - - - - - - - -

Interval - - - - - - - - - - - - - - - - - - - -

Lead (Pb)-Total 0.0000069 0.0000048 0.0000068 0.0000064 <0.000018 - - - - - - - - - - - - - - -

Lithium (Li)-Total <0.00015 <0.00013 <0.00013 <0.00014 <0.0018 - - - - - - - - - - - - - - -

Magnesium (Mg)-Total 0.00016 0.00015 0.00016 <0.00014 <0.0018 - - - - - - - - - - - - - - -

Manganese (Mn)-Total 0.0000181 0.0000109 0.0000214 0.0000082 <0.000018 - - - - - - - - - - - - - - -


Nickel (Ni)-Total <0.000015 <0.000013 <0.000013 <0.000014 <0.00018 - - - - - - - - - - - - - - -

Potassium (K)-Total <0.0015 <0.0013 <0.0013 <0.0014 <0.018 - - - - - - - - - - - - - - -


Silver (Ag)-Total <0.00000029 <0.00000053 <0.00000053 <0.00000085 <0.0000036 - - - - - - - - - - - - - - -

Sodium (Na)-Total <0.0015 <0.0013 0.0023 <0.0014 <0.018 - - - - - - - - - - - - - - -

Strontium (Sr)-Total 0.0000045 0.0000044 0.0000041 0.0000031 <0.000036 - - - - - - - - - - - - - - -


Tin (Sn)-Total <0.0000029 <0.0000027 <0.0000027 <0.0000028 <0.000036 - - - - - - - - - - - - - - -

Uranium (U)-Total <0.00000029 <0.00000027 <0.00000027 <0.00000028 <0.0000036 - - - - - - - - - - - - - - -

Vanadium (V)-Total <0.000029 <0.000027 <0.000027 <0.000028 <0.00036 - - - - - - - - - - - - - - -

Zinc (Zn)-Total <0.00012 <0.00013 <0.000080 <0.000085 <0.00036 - - - - - - - - - - - - - - -

ProjectReport To Sonia Meili, TASEKO MINES LIMITEDALS File No. L1014868Date Received 08-Jun-11 09:45Date 20-Jun-11

RESULTS OF ANALYSIS

Sample ID DF1 DF2 DF3 DF4FIELD BLANK AQ1-36 AQ2-36 AQ3-36 AQ1-37 AQ2-37 AQ3-37 AQ1-38 AQ2-38 AQ3-38 AQ1-39 AQ2-39 AQ3-39 AQ1-40 AQ2-40 AQ3-40

Date Sampled 03-JUN-11 03-JUN-11 03-JUN-11 03-JUN-11 03-JUN-11 04-MAY-11 04-MAY-11 04-MAY-11 08-MAY-11 08-MAY-11 08-MAY-11 14-MAY-11 14-MAY-11 14-MAY-11 20-MAY-11 20-MAY-11 20-MAY-11 26-MAY-11 26-MAY-11 26-MAY-11

Time Sampled 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00



Field Tests

Air volume - - - - - 6840 6660 6840 13320 13320 13320 6480 6840 6660 6480 6840 6840 6480 6840 6840

Particulates

Particulate - PM2.5 - - - - - - - 70 - - <50 - - 70 - - 70 - - <50

Particulate - PM2.5 - - - - - - - 10.2 - - <3.8 - - 10.5 - - 10.2 - - <7.3

Particulate - PM10 - - - - - - 93 - - <50 - - <50 - - <50 - - 53 -

Particulate - PM10 - - - - - - 14.0 - - <3.8 - - <7.3 - - <7.3 - - 7.8 -

Total Suspended Particulate - - - - - <50 - - <50 - - <50 - - <50 - - <50 - -

Total Suspended Particulate - - - - - <7.3 - - <3.8 - - <7.7 - - <7.7 - - <7.7 - -

Fixed Dustfall <0.10 <0.10 <0.10 <0.10 <0.10 - - - - - - - - - - - - - - -

Volatile Dustfall 0.15 0.46 0.27 0.56 0.38 - - - - - - - - - - - - - - -

Total Dustfall 0.15 0.47 0.29 0.56 0.45 - - - - - - - - - - - - - - -

Metals



Arsenic (As)-Total <0.0000029 <0.0000026 <0.0000025 <0.0000025 <0.0000038 - - - - - - - - - - - - - - -

Barium (Ba)-Total 0.0000079 0.0000062 0.0000059 0.0000090 <0.0000019 - - - - - - - - - - - - - - -


Bismuth (Bi)-Total <0.000015 <0.000013 <0.000012 <0.000013 <0.000019 - - - - - - - - - - - - - - -

Boron (B)-Total <0.00029 <0.00026 <0.00025 <0.00025 <0.00038 - - - - - - - - - - - - - - -

Cadmium (Cd)-Total <0.0000015 <0.0000013 <0.0000012 <0.0000013 <0.0000019 - - - - - - - - - - - - - - -

Calcium (Ca)-Total 0.00161 0.00128 0.00149 0.00170 0.00077 - - - - - - - - - - - - - - -

Chromium (Cr)-Total <0.000015 <0.000013 <0.000012 0.000018 <0.000019 - - - - - - - - - - - - - - -

Cobalt (Co)-Total <0.0000029 <0.0000026 <0.0000025 <0.0000025 <0.0000038 - - - - - - - - - - - - - - -

Copper (Cu)-Total 0.000158 0.0000199 0.0000736 0.0000463 0.0000396 - - - - - - - - - - - - - - -

Interval - - - - - - - - - - - - - - - - - - - -

Lead (Pb)-Total 0.0000080 0.0000051 0.0000066 0.0000092 <0.0000019 - - - - - - - - - - - - - - -

Lithium (Li)-Total <0.00015 <0.00013 <0.00012 <0.00013 <0.00019 - - - - - - - - - - - - - - -

Magnesium (Mg)-Total 0.00030 0.00029 0.00027 0.00033 <0.00019 - - - - - - - - - - - - - - -

Manganese (Mn)-Total 0.0000252 0.0000224 0.0000196 0.0000259 <0.0000019 - - - - - - - - - - - - - - -

Molybdenum (Mo)-Total <0.0000015 <0.0000013 <0.0000012 0.0000040 <0.0000019 - - - - - - - - - - - - - - -

Nickel (Ni)-Total <0.000015 <0.000013 <0.000012 <0.000013 <0.000019 - - - - - - - - - - - - - - -

Potassium (K)-Total <0.0015 0.0017 <0.0012 <0.0013 <0.0019 - - - - - - - - - - - - - - -


Silver (Ag)-Total <0.00000029 <0.00000026 <0.00000025 <0.00000025 <0.00000038 - - - - - - - - - - - - - - -

Sodium (Na)-Total <0.0015 <0.0013 <0.0012 <0.0013 <0.0019 - - - - - - - - - - - - - - -



Tin (Sn)-Total <0.0000029 <0.0000026 <0.0000025 <0.0000025 <0.0000038 - - - - - - - - - - - - - - -

Uranium (U)-Total <0.00000029 <0.00000026 <0.00000025 <0.00000025 <0.00000038 - - - - - - - - - - - - - - -

Vanadium (V)-Total <0.000029 <0.000026 <0.000025 <0.000025 <0.000038 - - - - - - - - - - - - - - -

Zinc (Zn)-Total 0.000121 0.000111 0.000088 0.000188 0.000063 - - - - - - - - - - - - - - -

ProjectReport To Sonia Meili, TASEKO MINES LIMITEDALS File No. L1032721Date Received 18-Jul-11 09:00Date 27-Jul-11

RESULTS OF ANALYSIS

Sample ID DF A1 DF A2 DF A3 DF A4DF FIELD BLANK A3 AQ1-41 AQ2-41 AQ3-41 AQ1-42 AQ2-42 AQ3-42 AQ1-43 AQ3-43 AQ1-44 AQ2-44 AQ3-44 AQ1-45 AQ2-45 AQ3-45

Date Sampled 04-JUL-11 04-JUL-11 04-JUL-11 04-JUL-11 04-JUL-11 04-JUN-11 04-JUN-11 04-JUN-11 07-JUN-11 07-JUN-11 07-JUN-11 13-JUN-11 13-JUN-11 19-JUN-11 19-JUN-11 19-JUN-11 25-JUN-11 25-JUN-11 25-JUN-11

Time Sampled 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00

ALS Sample ID L1032721-1 L1032721-2 L1032721-3 L1032721-4 L1032721-5 L1032721-6 L1032721-7 L1032721-8 L1032721-9 L1032721-10 L1032721-11 L1032721-12 L1032721-13 L1032721-14 L1032721-15 L1032721-16 L1032721-17 L1032721-18 L1032721-19

Matrix Dustfall Dustfall Dustfall Dustfall Dustfall Misc. Filter Filter Misc. Filter Filter Misc. Filter Misc. Filter Filter Misc. Filter Filter

Field Tests

Air volume - - - - - 6480 6660 6840 6300 6480 6660 6660 6660 6480 6840 6660 6480 6480 6840

Particulates

Particulate - PM2.5 - - - - - - - 76 - - <50 - <50 - - <50 - - <50

Particulate - PM2.5 - - - - - - - 11.1 - - <7.5 - <7.5 - - <7.5 - - <7.3

Particulate - PM10 - - - - - - <50 - - <50 - - - - <50 - - <50 -

Particulate - PM10 - - - - - - <7.5 - - <7.7 - - - - <7.3 - - <7.7 -

Total Suspended Particulate - - - - - <50 - - <50 - - <50 - <50 - - <50 - -

Total Suspended Particulate - - - - - <7.7 - - <7.9 - - <7.5 - <7.7 - - <7.7 - -

Fixed Dustfall <0.10 <0.10 <0.10 <0.10 <0.10 - - - - - - - - - - - - - -

Volatile Dustfall 0.30 0.16 0.30 0.11 <0.10 - - - - - - - - - - - - - -

Total Dustfall 0.35 0.16 0.32 0.11 <0.10 - - - - - - - - - - - - - -

Metals

Aluminum (Al)-Total 0.000631 0.000390 0.000366 0.000309 <0.00013 - - - - - - - - - - - - - -

Antimony (Sb)-Total <0.0000029 <0.0000025 <0.0000026 <0.0000030 <0.0000044 - - - - - - - - - - - - - -

Arsenic (As)-Total <0.0000029 <0.0000025 <0.0000026 <0.0000030 <0.0000044 - - - - - - - - - - - - - -

Barium (Ba)-Total 0.0000163 0.0000097 0.0000103 0.0000069 0.0000050 - - - - - - - - - - - - - -

Beryllium (Be)-Total <0.000015 <0.000013 <0.000013 <0.000015 <0.000022 - - - - - - - - - - - - - -

Bismuth (Bi)-Total <0.000015 <0.000013 <0.000013 <0.000015 <0.000022 - - - - - - - - - - - - - -

Boron (B)-Total <0.00029 <0.00025 <0.00026 <0.00030 <0.00044 - - - - - - - - - - - - - -

Cadmium (Cd)-Total <0.0000015 <0.0000013 <0.0000013 <0.0000015 <0.0000022 - - - - - - - - - - - - - -

Calcium (Ca)-Total 0.00335 0.00153 0.00284 0.00197 0.00123 - - - - - - - - - - - - - -

Chromium (Cr)-Total <0.000015 <0.000013 <0.000013 <0.000015 <0.000022 - - - - - - - - - - - - - -

Cobalt (Co)-Total <0.0000029 <0.0000025 <0.0000026 <0.0000030 <0.0000044 - - - - - - - - - - - - - -

Copper (Cu)-Total 0.000575 0.000112 0.000189 0.0000902 0.000131 - - - - - - - - - - - - - -

Interval - - - - - - - - - - - - - - - - - - -

Lead (Pb)-Total 0.0000154 0.0000095 0.0000061 0.0000058 0.0000038 - - - - - - - - - - - - - -

Lithium (Li)-Total <0.00015 <0.00013 <0.00013 <0.00015 <0.00022 - - - - - - - - - - - - - -

Magnesium (Mg)-Total 0.00087 0.00034 0.00158 0.00158 <0.00022 - - - - - - - - - - - - - -

Manganese (Mn)-Total 0.0000445 0.0000230 0.0000350 0.0000265 <0.0000035 - - - - - - - - - - - - - -

Molybdenum (Mo)-Total <0.0000015 <0.0000013 <0.0000013 <0.0000015 <0.0000022 - - - - - - - - - - - - - -

Nickel (Ni)-Total <0.000015 <0.000013 <0.000013 <0.000015 <0.000022 - - - - - - - - - - - - - -

Potassium (K)-Total 0.0039 0.0021 0.0119 0.0104 <0.0022 - - - - - - - - - - - - - -

Selenium (Se)-Total <0.000029 <0.000025 <0.000026 <0.000030 <0.000044 - - - - - - - - - - - - - -

Silver (Ag)-Total <0.00000029 <0.00000025 <0.00000026 <0.00000060 <0.00000044 - - - - - - - - - - - - - -

Sodium (Na)-Total <0.0015 0.0014 0.0023 0.0018 <0.0022 - - - - - - - - - - - - - -

Strontium (Sr)-Total 0.0000167 0.0000064 0.0000133 0.0000075 <0.0000044 - - - - - - - - - - - - - -

Thallium (Tl)-Total <0.0000029 <0.0000025 <0.0000026 <0.0000030 <0.0000044 - - - - - - - - - - - - - -

Tin (Sn)-Total <0.0000029 <0.0000025 <0.0000026 <0.0000030 <0.0000044 - - - - - - - - - - - - - -

Uranium (U)-Total <0.00000029 <0.00000025 <0.00000026 <0.00000030 <0.00000044 - - - - - - - - - - - - - -

Vanadium (V)-Total <0.000029 <0.000025 <0.000026 <0.000030 <0.000044 - - - - - - - - - - - - - -

Zinc (Zn)-Total 0.000159 0.000126 0.000172 0.000154 0.000074 - - - - - - - - - - - - - -

ProjectReport To Sonia Meili, TASEKO MINES LIMITEDALS File No. L1046442Date Received 17-Aug-11 09:10Date 26-Aug-11

RESULTS OF ANALYSIS

Sample ID DF1 DF2 DF3 DF4FIELD BLANK AQ1-46 AQ2-46 AQ3-46 AQ1-47 AQ2-47 AQ3-47 AQ1-48 AQ1-49 AQ2-49 AQ3-49 AQ1-50 AQ2-50 AQ3-50 AQ1-51 AQ2-51 AQ3-51

Date Sampled 03-AUG-11 03-AUG-11 03-AUG-11 03-AUG-11 03-AUG-11 01-JUL-11 01-JUL-11 01-JUL-11 07-JUL-11 07-JUL-11 07-JUL-11 13-JUL-11 21-JUL-11 21-JUL-11 21-JUL-11 26-JUL-11 26-JUL-11 26-JUL-11 31-JUL-11 31-JUL-11 31-JUL-11

Time Sampled 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00

ALS Sample ID L1046442-1 L1046442-2 L1046442-3 L1046442-4 L1046442-5 L1046442-6 L1046442-7 L1046442-8 L1046442-9 L1046442-10 L1046442-11 L1046442-12 L1046442-13 L1046442-14 L1046442-15 L1046442-16 L1046442-17 L1046442-18 L1046442-19 L1046442-20 L1046442-21

Matrix Dustfall Dustfall Dustfall Dustfall Dustfall Misc. Filter Filter Misc. Filter Filter Misc. Misc. Filter Filter Misc. Filter Filter Misc. Filter Filter

Field Tests

Air Volume, Client Supplied - - - - - 6480 7020 6840 6480 6840 6840 6480 6480 8880 10289 10287 10628 13986 6480 6660 6660

Particulates

Particulate - PM2.5 - - - - - - - <50 - - <50 - - - <50 - - 50 - - 110

Particulate - PM2.5 - - - - - - - <7.3 - - <7.3 - - - <4.9 - - <3.6 - - 16.5

Particulate - PM10 - - - - - - 80 - - 60 - - - 63 - - 73 - - 57 -

Particulate - PM10 - - - - - - 11.4 - - 8.8 - - - 7.1 - - 6.9 - - 8.5 -

Total Suspended Particulate - - - - - <50 - - 197 - - 93 57 - - 110 - - <50 - -

Total Suspended Particulate - - - - - <7.7 - - 30.4 - - 14.4 8.7 - - 10.7 - - <7.7 - -

Fixed Dustfall <0.10 <0.10 <0.10 <0.10 <0.10 - - - - - - - - - - - - - - - -

Volatile Dustfall 0.21 <0.10 <0.10 0.12 <0.10 - - - - - - - - - - - - - - - -

Total Dustfall 0.24 <0.10 <0.10 0.16 <0.10 - - - - - - - - - - - - - - - -

Metals

Aluminum (Al)-Total 0.000162 0.000115 0.000375 0.000144 <0.00012 - - - - - - - - - - - - - - - -

Antimony (Sb)-Total <0.0000010 <0.0000014 <0.0000015 <0.0000014 <0.0000020 - - - - - - - - - - - - - - - -

Arsenic (As)-Total <0.0000010 <0.0000014 <0.0000015 <0.0000014 <0.0000020 - - - - - - - - - - - - - - - -

Barium (Ba)-Total 0.00000419 0.00000336 0.00000686 0.00000358 0.00000653 - - - - - - - - - - - - - - - -

Beryllium (Be)-Total <0.0000050 <0.0000069 <0.0000077 <0.0000072 <0.0000098 - - - - - - - - - - - - - - - -

Bismuth (Bi)-Total <0.0000050 <0.0000069 <0.0000077 <0.0000072 <0.0000098 - - - - - - - - - - - - - - - -

Boron (B)-Total <0.00010 <0.00014 <0.00015 <0.00014 <0.00020 - - - - - - - - - - - - - - - -

Cadmium (Cd)-Total <0.00000050 <0.00000069 <0.00000077 <0.00000072 <0.00000098 - - - - - - - - - - - - - - - -

Calcium (Ca)-Total 0.00167 0.00087 0.00210 0.00111 0.00105 - - - - - - - - - - - - - - - -

Chromium (Cr)-Total <0.0000050 <0.0000069 <0.0000077 <0.0000072 <0.0000098 - - - - - - - - - - - - - - - -

Cobalt (Co)-Total <0.0000010 <0.0000014 <0.0000015 <0.0000014 <0.0000020 - - - - - - - - - - - - - - - -

Copper (Cu)-Total 0.0000671 0.0000308 0.000132 0.000114 0.0000645 - - - - - - - - - - - - - - - -

Interval - - - - - - - - - - - - - - - - - - - - -

Lead (Pb)-Total 0.00000291 0.00000113 0.00000356 0.00000296 0.00000111 - - - - - - - - - - - - - - - -

Lithium (Li)-Total <0.000050 <0.000069 <0.000077 <0.000072 <0.000098 - - - - - - - - - - - - - - - -

Magnesium (Mg)-Total 0.000525 0.000234 0.000924 0.00132 <0.000098 - - - - - - - - - - - - - - - -

Manganese (Mn)-Total 0.0000250 0.0000136 0.0000270 0.0000191 0.00000229 - - - - - - - - - - - - - - - -

Molybdenum (Mo)-Total <0.00000050 <0.00000069 <0.00000077 <0.00000072 <0.00000098 - - - - - - - - - - - - - - - -

Nickel (Ni)-Total <0.0000050 <0.0000069 <0.0000077 <0.0000072 <0.0000098 - - - - - - - - - - - - - - - -

Potassium (K)-Total 0.00489 0.00145 0.00782 0.0125 <0.00098 - - - - - - - - - - - - - - - -

Selenium (Se)-Total <0.000010 <0.000014 <0.000015 <0.000014 <0.000020 - - - - - - - - - - - - - - - -

Silver (Ag)-Total 0.00000017 0.00000031 0.00000020 0.00000024 <0.00000020 - - - - - - - - - - - - - - - -

Sodium (Na)-Total 0.00074 <0.00069 0.00081 0.00156 <0.00098 - - - - - - - - - - - - - - - -

Strontium (Sr)-Total 0.0000083 0.0000037 0.0000112 0.0000042 0.0000031 - - - - - - - - - - - - - - - -

Thallium (Tl)-Total <0.0000010 <0.0000014 <0.0000015 <0.0000014 <0.0000020 - - - - - - - - - - - - - - - -

Tin (Sn)-Total <0.0000010 <0.0000014 <0.0000015 <0.0000014 <0.0000020 - - - - - - - - - - - - - - - -

Uranium (U)-Total <0.00000010 <0.00000014 <0.00000015 <0.00000014 <0.00000020 - - - - - - - - - - - - - - - -

Vanadium (V)-Total <0.000010 <0.000014 <0.000015 <0.000014 <0.000020 - - - - - - - - - - - - - - - -

Zinc (Zn)-Total 0.000052 0.000049 0.000065 0.000068 <0.000020 - - - - - - - - - - - - - - - -

ProjectReport To Sonia Meili, TASEKO MINES LIMITEDALS File No. L1058246Date Received 14-Sep-11 08:44Date 27-Sep-11

RESULTS OF ANALYSIS

Sample ID DF1 DF2 DF3 DF4DF FIELD


Date Sampled 31-AUG-11 31-AUG-11 31-AUG-11 31-AUG-11 31-AUG-11 06-AUG-11 06-AUG-11 06-AUG-11 12-AUG-11 12-AUG-11 12-AUG-11 18-AUG-11 18-AUG-11 18-AUG-11 24-AUG-11 24-AUG-11 24-AUG-11 30-AUG-11 30-AUG-11 30-AUG-11

Time Sampled 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00



Field Tests

Air Volume, Client Supplied - - - - - 6480 6480 6660 6480 6480 6660 6480 6660 6660 5940 6271.5 6105 6480 6480 6480

Particulates

Particulate - PM2.5 - - - - - - - <50 - - 67 - - <50 - - <50 - - <50

Particulate - PM2.5 - - - - - - - <7.5 - - 10.0 - - <7.5 - - <8.2 - - <7.7

Particulate - PM10 - - - - - - 50 - - <50 - - <50 - - <50 - - <50 -

Particulate - PM10 - - - - - - 7.7 - - <7.7 - - <7.5 - - <8.0 - - <7.7 -

Total Suspended Particulate - - - - - 80 - - <50 - - <50 - - 83 - - 53 - -

Total Suspended Particulate - - - - - 12.3 - - <7.7 - - <7.7 - - 14.0 - - 8.2 - -

Fixed Dustfall 0.15 <0.10 <0.10 <0.10 <0.10 - - - - - - - - - - - - - - -

Volatile Dustfall 1.53 0.23 0.36 0.39 <0.10 - - - - - - - - - - - - - - -

Total Dustfall 1.69 0.25 0.37 0.42 <0.10 - - - - - - - - - - - - - - -

Metals



Arsenic (As)-Total <0.0000013 <0.0000020 <0.0000019 <0.0000019 <0.0000056 - - - - - - - - - - - - - - -

Barium (Ba)-Total 0.0000103 0.00000576 0.00000820 0.0000155 0.0000076 - - - - - - - - - - - - - - -


Bismuth (Bi)-Total <0.0000067 <0.0000098 <0.0000095 <0.0000095 <0.000028 - - - - - - - - - - - - - - -

Boron (B)-Total <0.00013 <0.00020 <0.00019 <0.00019 <0.00056 - - - - - - - - - - - - - - -

Cadmium (Cd)-Total <0.00000067 <0.00000098 <0.00000095 <0.00000095 <0.0000028 - - - - - - - - - - - - - - -

Calcium (Ca)-Total 0.00199 0.00125 0.00128 0.00364 0.0014 - - - - - - - - - - - - - - -


Cobalt (Co)-Total <0.0000013 <0.0000020 <0.0000019 <0.0000019 <0.0000056 - - - - - - - - - - - - - - -

Copper (Cu)-Total 0.000436 0.000227 0.0000487 0.000165 0.000101 - - - - - - - - - - - - - - -

Interval - - - - - - - - - - - - - - - - - - - -

Lead (Pb)-Total 0.00000633 0.00000251 0.00000143 0.00000243 0.0000034 - - - - - - - - - - - - - - -

Lithium (Li)-Total <0.000067 <0.000098 <0.000095 <0.000095 <0.00028 - - - - - - - - - - - - - - -



Molybdenum (Mo)-Total <0.00000067 <0.00000098 <0.00000095 0.00000240 <0.0000028 - - - - - - - - - - - - - - -

Nickel (Ni)-Total <0.0000067 <0.0000098 <0.0000095 <0.0000095 <0.000028 - - - - - - - - - - - - - - -

Potassium (K)-Total 0.00519 0.00598 0.00305 0.104 <0.0028 - - - - - - - - - - - - - - -


Silver (Ag)-Total <0.00000013 <0.00000039 <0.00000038 <0.00000095 <0.0000017 - - - - - - - - - - - - - - -

Sodium (Na)-Total 0.00119 0.00134 0.00165 0.0141 <0.0028 - - - - - - - - - - - - - - -



Tin (Sn)-Total <0.0000013 <0.0000020 <0.0000019 <0.0000019 <0.0000056 - - - - - - - - - - - - - - -

Uranium (U)-Total 0.00000017 <0.00000020 <0.00000019 <0.00000019 <0.00000056 - - - - - - - - - - - - - - -

Vanadium (V)-Total <0.000013 <0.000020 <0.000019 <0.000019 <0.000056 - - - - - - - - - - - - - - -

Zinc (Zn)-Total 0.000077 0.000074 0.000087 0.000301 0.000058 - - - - - - - - - - - - - - -

ProjectReport To Sonia Meili, TASEKO MINES LIMITEDALS File No. L1073143Date Received 18-Oct-11 09:25Date 27-Oct-11

RESULTS OF ANALYSIS

Sample ID DF A1 DF A2 DF A3 DF A4 DF A2 FIELD


Date Sampled 30-SEP-11 30-SEP-11 30-SEP-11 30-SEP-11 30-SEP-11 05-SEP-11 05-SEP-11 05-SEP-11 11-SEP-11 11-SEP-11 11-SEP-11 17-SEP-11 17-SEP-11 17-SEP-11 23-SEP-11 23-SEP-11 23-SEP-11 29-SEP-11 29-SEP-11 29-SEP-11

Time Sampled 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00



Field Tests

Air Volume, Client Supplied - - - - - 6480 6660 6660 6480 6480 6840 6480 6480 6660 6480 6660 6660 6480 6660 6840

Particulates

Particulate - PM2.5 - - - - - - - <50 - - <50 - - <50 - - <50 - - <50

Particulate - PM2.5 - - - - - - - <7.5 - - <7.3 - - <7.5 - - <7.5 - - <7.3

Particulate - PM10 - - - - - - <50 - - <50 - - <50 - - <50 - - <50 -

Particulate - PM10 - - - - - - <7.5 - - <7.7 - - <7.7 - - <7.5 - - <7.5 -

Total Suspended Particulate - - - - - <50 - - 53 - - <50 - - 70 - - <50 - -

Total Suspended Particulate - - - - - <7.7 - - 8.2 - - <7.7 - - 10.8 - - <7.7 - -

Fixed Dustfall <0.10 <0.10 <0.10 <0.10 <0.10 - - - - - - - - - - - - - - -

Volatile Dustfall 0.31 0.24 0.33 <0.10 <0.10 - - - - - - - - - - - - - - -

Total Dustfall 0.31 0.24 0.38 <0.10 <0.10 - - - - - - - - - - - - - - -

Metals

Aluminum (Al)-Total 0.00113 0.000593 0.00123 <0.00044 <0.00052 - - - - - - - - - - - - - - -


Arsenic (As)-Total <0.0000023 <0.0000019 <0.0000017 <0.0000017 <0.0000040 - - - - - - - - - - - - - - -

Barium (Ba)-Total 0.0000146 0.00000860 0.0000104 0.00000383 0.0000034 - - - - - - - - - - - - - - -


Bismuth (Bi)-Total <0.000012 <0.0000094 <0.0000084 <0.0000084 <0.000020 - - - - - - - - - - - - - - -

Boron (B)-Total <0.00023 <0.00019 <0.00017 <0.00017 <0.00040 - - - - - - - - - - - - - - -

Cadmium (Cd)-Total <0.0000012 <0.00000094 0.00000118 <0.00000084 <0.0000020 - - - - - - - - - - - - - - -

Calcium (Ca)-Total 0.00373 0.00207 0.00126 0.00080 0.00092 - - - - - - - - - - - - - - -


Cobalt (Co)-Total <0.0000023 <0.0000019 <0.0000017 <0.0000017 <0.0000040 - - - - - - - - - - - - - - -

Copper (Cu)-Total 0.000148 0.000238 0.0000609 0.000102 0.000227 - - - - - - - - - - - - - - -

Interval - - - - - - - - - - - - - - - - - - - -

Lead (Pb)-Total 0.0000023 0.00000399 0.00000244 0.00000211 0.0000040 - - - - - - - - - - - - - - -

Lithium (Li)-Total <0.00012 <0.000094 <0.000084 <0.000084 <0.00020 - - - - - - - - - - - - - - -




Nickel (Ni)-Total <0.000012 <0.0000094 <0.0000084 <0.0000084 <0.000020 - - - - - - - - - - - - - - -

Potassium (K)-Total 0.0081 <0.00094 0.00291 <0.00084 <0.0020 - - - - - - - - - - - - - - -


Silver (Ag)-Total <0.00000046 <0.00000038 <0.00000034 <0.00000034 <0.00000081 - - - - - - - - - - - - - - -

Sodium (Na)-Total 0.0013 <0.00094 0.00149 <0.00084 <0.0020 - - - - - - - - - - - - - - -



Tin (Sn)-Total <0.0000023 <0.0000019 <0.0000017 <0.0000017 <0.0000040 - - - - - - - - - - - - - - -

Uranium (U)-Total <0.00000023 <0.00000019 <0.00000017 <0.00000017 <0.00000040 - - - - - - - - - - - - - - -

Vanadium (V)-Total <0.000023 <0.000019 <0.000017 <0.000017 <0.000040 - - - - - - - - - - - - - - -

Zinc (Zn)-Total 0.000115 0.000065 0.000125 0.000063 <0.000040 - - - - - - - - - - - - - - -

Appendix2–FieldSheets

A.AirQualityFieldSheet:1.PMSampling–FieldDataLogProject: Prosperity Base Line Air Monitoring

Date – Filter Installation: ____________

Date – Sampled: ____________

Date – Filter Collection: ____________

Start – Atm. Pressure [mmHg]:_____________ End – Atm. Pressure [mmHg]:________________

Start – Ambient Temp [°C]: _______________ End – Ambient Temp [°C]:__________________

Site ID

Sample # Sampler Serial #

Filter # Start End Notes

Roto Flow Elap Time Roto Flow Elap Time

AQ1

-TSP

Filter Comment: _____________________________________________________________

Site Comment: ______________________________________________________________

AQ2

-PM10

Filter Comment: _____________________________________________________________

Site Comment: ______________________________________________________________

AQ3

-PM2.5

Filter Comment: _____________________________________________________________

Site Comment: ______________________________________________________________

2.SetPointCalculationSheetDate: _______________ Unit #:__________

mvol = ___________

bvol = __________

1. Record pressure and temperature values from barometer and thermometer. In the Space below. Follow the instruction to convert pressure and temperature values to appropriate units. Values calculated in this section will be used in Step 2.

Current Pressure = _________ hPa x 0.75 = ____________mmHg

Current Temperature = ______°C + 273.15 = _________°K

2. Use pressure and temperatures calculated above in this equation to fill in the blanks in the equation below

Pressure x 0.392 Temperature

________ x 0.392 ________ = ____________

3. Take the square root of the value calculated in Step 2

____________ = ____________

4. Multiply value calculated in Step 3 by 5

__________ x 5 = ______________

5. Subtract bvol from value calculated in Step 4.

NOTE – bvol values are always negative. When you subtract a negative number, this is the same thing

as adding the value i.e., 5 – (‐2) is the same thing as saying 5 + 2 = 7

___________ ‐ _____________= ____________

6. Divide the value calculated in Step 5 by mvol

______________ __________ = __________

7. Round the value calculated in Step 6 to the nearest 0.25. This number will be your set point.

NOTE: Calibration Information

The mvol and bvol values are unique to each Minivol unit and are provided by the manufacturer based on

the initial calibration of the unit.

Unit 5413: mvol = 1.1586

bvol = ‐0.5072

Unit 5414: mvol = 1.1298

bvol = ‐0.3334

Unit 5415: mvol = 1.1413

bvol = ‐0.2701

Unit 5416: mvol = 1.1551

bvol = ‐0.4844

B.DustfallFieldSheet1.FieldDataLogProject: Prosperity Base Line Dustfall Monitoring

Site ID: ____________

Month:____________

Date Exposed

Date:_____________

Time:_____________

Vol DI H2O added:

Sample a: _____mL

Sample b: _____mL

Comments:

Site Visit

Date:_____________

Time:_____________

Vol DI H2O added:

Sample a: _____mL

Sample b: _____mL

Comments:

Site Visit

Date:_____________

Time:_____________

Vol DI H2O added:

Sample a: _____mL

Sample b: _____mL

Comments:

Site Visit

Date:_____________

Time:_____________

Vol DI H2O added:

Sample a: _____mL

Sample b: _____mL

Comments:

Site Visit

Date:_____________

Time:_____________

Vol DI H2O added:

Sample a: _____mL

Sample b: _____mL

Comments:

Date Collected

Date:_____________

Time:_____________

Vol DI H2O added:

Sample a: _____mL

Sample b: _____mL

Comments:

Appendix3.PreparationProcedures

A.OfficePrepforAirQualityMonitoring:1. Recharge battery packs. Batteries are fully charged when LED on charger is green.

2. Download and save field photos.

3. Remove completed field sheets from binder and file.

4. In a clean environment, remove used filters from filter assembly and place immediately in to filter holder (clear plastic case or plastic bag) in which the filter originally came. Each filter is numbered. Ensure that the filter is placed in to the bag or case with the matching number.

5. Place a label on each filter holder with the following information: ‐ Company Name (Taseko)

‐ Filter #

‐ Sample # (ex. AQ 1‐6)

‐ Sample Date (this is the actual date on which the pump ran, not the date you changed

the filter)

‐ Type of analysis (TSP, PM10 or PM2.5)

6. Store used filters in a clean plastic bag and ship to lab monthly with dustfall canisters.

7. When appropriate, clean impactor assembly (see p 20 of the MiniVol TAS Operation manual (Rev 1.2) for instructions).

8. Place new filters in to filter assemblies – ensure filter (white) is face up in assembly.

9. Place a sticker on the outside of the filter assembly denoting the filter number.

10. Place filter assembly in to a clean plastic bag with the appropriate label on it (TSP, PM10, PM2.5).

B.ParticulateMatterSamplingRoutineatSite1. Open sampler case.

2. Record hours shown on the elapsed time totalizer.

3. Check for any error conditions that exist. If either the ‘Low Flow’ or ‘Low Battery’ error indicators are

lit, record the error and press the reset button.

4. Press the On/Auto/Off button to start the sampler pump.

5. With the sampler running (in a vertical position) and the flow stable, read the flowmeter (to the

nearest 0.25 lpm at the center of the ball) and record the ending flow rate.

6. Press the On/Auto/Off button to stop the sampler pump.

7. Before removing the impactor/filter holder assembly from the sampler, cross check the filter sticker

number on the assembly with the filter number on the field data worksheet. If the numbers are

different, make a note and record the actual filter number on the worksheet.

8. Remove the impactor/filter holder assembly from the inlet tube and place it in a clean plastic bag or

case for transport.

9. Change the battery pack (Do not inadvertently reuse the spent battery pack). If either the ‘Low Flow’

or ‘Low Battery’ indicators were lit, make a note and record the battery pack number since it may be

defective.

10. Check the sampler for leaks by pressing the On/Auto/Off button to start the sampler pump and

covering the inlet tube with the palm of your hand. The ball should drop to zero. Note: the pump may

stall momentarily until the flow control circuit compensates. If the sampler will not pass a leak check, go

to section 2.5 ‘Checking for Leaks’ of the Operator Manual. Make sure the sampler is leak free before

moving on.

11. Attach a new impactor/filter holder assembly containing a new filter.

12. Press the On/Auto/Off button to start the sampler pump.

13. With the sampler running (in a vertical position), adjust the flow rate to the correct set point. Press

the On/Auto/Off button to stop the sampler pump.

14. On a new ‘Field Data Log’ worksheet record the site ID, sampler #, filter #, beginning flow rate,

elapsed time totalizer reading and any other pertinent information.

15. Program the programmable timer (see section 2.4 ‘Programmable Timer’ of Operators manual if

needed).

16. Place the sampler in the ‘Auto’ mode.

17. Close the sampler case.

C.DustfallMonitoringProcedure:

1. Bring ladder, Deionized (DI) water, measuring cup (in clean plastic bag), camera and field binder.

2. Assess dustfall stand condition: is it still standing, are the canisters at the appropriate level (min 8 ft above ground).

– If dustfall bracket has slid down so that the top of the canisters is below 8 feet, push the pole upwards and place a nail under the pipe so as to maintain the appropriate height.

– If stand has been vandalized or has fallen down, notify Taseko.

3. On appropriate field sheet, note site weather (snow, bare, sunny, etc.) and condition of stand and canisters. Note whether the liquid in the canister is frozen. If canisters are freezing, please notify Taseko.

4. Assess water level in canisters. If there is less than 1 inch of water in the canister, add an appropriate volume of DI water using a measuring cup. Triple rinse measuring cup with DI water prior to adding water to canister. Record the volume of water added to each canister on the field sheet.

5. Take photos of the station marker and the stand and dustfall canisters.

D.DustfallMonitoringSampleCollectionProcedure:1. Bring coolers, ice packs, replacement canisters and lids for canisters to be removed, ladder, field

blanks (where appropriate), Deionized (DI) water, measuring cup (in clean plastic bag), camera and field binder

2. Assess dustfall stand condition: is it still standing, are the canisters at the appropriate level (min 8 ft above ground).

‐ If dustfall bracket has spilled down so that the top of the canisters is below 8 feet, push

the pole upwards and place a nail under the pipe so as to maintain the appropriate

height.

‐ If stand has been vandalized or has fallen down, notify Taseko.

3. On appropriate field sheet, note site weather (snow, bare, sunny, etc.) and condition of stand and canisters. Note whether the liquid in the canister is frozen. If canisters are freezing, please notify Taseko.

4. Cap canisters prior to removing them from the stand.

5. On appropriate field sheet, note date and time canister was collected.

6. Place new canisters in stand. Remove lid of new canister after placing the canister in the stand.

7. Start a new field sheet for the new canister, noting exposure time and date and site conditions.

8. If appropriate, collect a field blank by: - removing cap of canister, - triple rinse measuring cup with DI water, - measure out at least 250 ml DI water and pour water in to canister, - replace measuring cup in clean plastic bag, - cap canister, - note on appropriate field sheet that field blanks were collected, and the volume of DI

water added to the sample.

9. Tape lids of canisters so that they cannot unscrew.

10. Prepare a label for each canister with the following information: - Company Name (Taseko) - Sample # (ex. DF 1a) - Date and time of Exposure - Date and Time of Collection - Volume of DI water added over the month

11. Place labeled canisters in cooler. Ensure canisters remain standing up – this can be accomplished by packing extra space with scrap paper or bubble wrap.

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