REPORT - EPA WAepa.wa.gov.au/sites/default/files/API_documents/Appendix G... · REPORT. Report...

June 2014

BROWNS RANGE PROJECT

Preliminary Geochemical Assessment of Tailings Acidic and Metalliferous Drainage Potential

REPO

RT

Report Number. 137645044-011-R-Rev2

Distribution: 1 Electronic Copy – Northern Minerals Ltd 1 Electronic Copy – Golder Associates Pty Ltd

Submitted to: Northern Minerals Ltd PO Box 669 WEST PERTH WA 6872

BROWNS RANGE PROJECT – PRELIMINARY GEOCHEMICAL ASSESSMENT OF TAILINGS

June 2014 Report No. 137645044-011-R-Rev2 i

Table of Contents

1.0 INTRODUCTION ........................................................................................................................................................ 1

2.0 SCOPE OF WORK .................................................................................................................................................... 1

3.0 SAMPLE INFORMATION .......................................................................................................................................... 1

3.1 Tailings generation ....................................................................................................................................... 1

3.2 Tailings mass balance .................................................................................................................................. 2

3.3 Sample origin ................................................................................................................................................ 3

3.4 Sample delivery ............................................................................................................................................ 4

3.5 Sample preparation ...................................................................................................................................... 4

3.5.1 Golder laboratory .................................................................................................................................... 4

3.5.2 ALS laboratory ........................................................................................................................................ 4

4.0 METHODS ................................................................................................................................................................. 5

4.1 Analysis suites .............................................................................................................................................. 5

4.2 Parameters analysed .................................................................................................................................... 5

Solid suite (listed as soil on ALS laboratory certificates) ............................................................................................ 5

Liquid suite (listed as water on ALS laboratory certificates) ....................................................................................... 5

Leachate suite (listed as deionised water leachate on ALS laboratory certificates) ................................................... 6

5.0 RESULTS AND INTERPRETATION ......................................................................................................................... 6

5.1 Data presentation ......................................................................................................................................... 6

5.2 Comparative Guidelines for Constituents of Interest ..................................................................................... 6

5.3 Quality assurance (QA) and quality control (QC) .......................................................................................... 7

5.3.1 Quality of analysis ................................................................................................................................... 7

5.4 General chemistry and acid producing potential ........................................................................................... 7

5.4.1 Flotation tailings ...................................................................................................................................... 7

5.4.2 Hydromet tailings .................................................................................................................................... 9

5.4.3 Treated waste water.............................................................................................................................. 11

5.5 Potential effects of mixed tailings streams .................................................................................................. 11

6.0 CONCLUSIONS ....................................................................................................................................................... 12

7.0 RECOMMENDATIONS ............................................................................................................................................ 13

8.0 LIMITATIONS .......................................................................................................................................................... 14

REFERENCES .................................................................................................................................................................. 15


June 2014 Report No. 137645044-011-R-Rev2 ii

TABLES Table 1: Tailings mass balance summary ........................................................................................................................... 3

Table 2: Sample information (NML, 2014a)......................................................................................................................... 4

Table 3: Analytes with breached laboratory holding times as reported in laboratory QC certificate .................................... 7

Table 4: COI analysis results for the flotation, hydromet solid samples and combined. Sulfide sulfur calculated as balance after subtraction of sulfate sulfur from total sulfur. .............................................................................. 10

FIGURES Figure 1: Schematic representation of plant process and waste streams generation ......................................................... 2

APPENDICES APPENDIX A Laboratory Chain of Custody and Certificates of Analysis

APPENDIX B Result Tables

APPENDIX C AMIRA (2002) Classification Flow Chart

APPENDIX D Limitations


June 2014 Report No. 137645044-011-R-Rev2 1

1.0 INTRODUCTION Golder Associates Pty Ltd (Golder) has been engaged by Northern Minerals Ltd (NML) to provide consulting services to undertake options studies for tailings management at the Browns Range Project, located approximately 150 km south-east of Halls Creek in Western Australia.

The Browns Range Project comprises several deposits of Xenotime (yttrium orthophosphate – YPO4) and other “heavy” rare earth minerals, as well as some “light” rare earths. NML currently envisages a process that will involve crushing/grinding the ore, flotation (flot) and/or magnetic separation to produce a rare earth concentrate, containing total rare earth oxides (TREO). The process plant is expected to generate two tailings streams, one from a beneficiation plant, which produces approximately 90% of the total tailings and one from a hydrometallurgical plant, which will produce the remaining 10%.

NML commissioned Golder to undertake a preliminary geochemical characterisation of the tailings in order to assist NML with a prefeasibility study (PFS) and environmental approvals.

2.0 SCOPE OF WORK This report presents the findings from studies undertaken to geochemically characterise tailings material to support preliminary design and environmental considerations. The samples used in the assessment were supplied from the beneficiation and hydrometallurgical (hydromet) pilot plants, as generated by NML in its process development studies. The assessment should be considered as preliminary, as the final tailings composition has not yet been determined. Assessment of the material has included analysis of geochemical properties that could influence tailings dewatering options and storage facility designs with respect to meeting environmental compliance criteria. The properties of the tailings considered in this assessment were:

Acid forming potential

Content of elements of environmental importance (EEIs)

Leachable elements of environmental importance.

3.0 SAMPLE INFORMATION 3.1 Tailings generation The metallurgical process is currently being optimised. As a result, there remains some uncertainty in regards the composition of the final tailings material. The tailings generated at the process plant are expected to comprise the seven or eight waste streams presented in Figure 1 on page 2.

The sample used to represent the output from the beneficiation plant, representing 90% of the final tailings mass flow, comprised tailings from the flotation process only (Option 2, Figure 1). At the time of testing, NML advised Golder that this was the preferred option for the beneficiation process. Therefore, the geochemical characterisation of the tailings generated from Option 1 (Figure 1) that represents a combined magnetic and flotation process has not been included in this assessment.

The sample used to represent the tailings output from the hydrometallurgical plant, representing 10% of the final tailings mass flow, comprised the following components:

Water leach residue (WLR)

Conditioning residue (CR)

Waste water residue (WWR) representative of the combined ion exchange residue (IXR tailings) and oxalate residue (OXR tailings).



Figure 1: Schematic representation of plant process and waste streams generation

The flotation and hydrometallurgical (hydromet) tailings samples were supplied by NML as slurry and dried solids, respectively (refer to Section 3.4).

A sample representative of the gas scrubber waste (GSW), which represents approximately 13% of the mass of the combined hydromet tailings stream, was not available to test. Therefore, the GSW was not included in the assessment. The GSW tailings stream component of the hydromet sample was substituted with commercially available gypsum in physical testwork (Golder, 2013). The substitution was based on information received form NML that gypsum will represent the major component of the output from the gas scrubber. Commercially available gypsum was not included in the sample for geochemical testwork. The geochemical properties of the GSW, with respect to content of EEIs are unknown. Introduction of commercially available gypsum may influence the results of geochemical analysis but cannot be considered to be representative of the GSW. The GSW may have the potential to include EEIs or other properties that may affect the mobility of these components of interest to the study. The effect of the GSW on the leachability of elements of concern from the tailings streams will need to be verified in the future.

As a result of the above considerations, the hydromet sample should, therefore, be viewed as a partial sample.

3.2 Tailings mass balance The proportions of individual waste streams used to create the hydromet solid were provided in an email dated 17 October 2013. These are shown in Table 1.



Table 1: Tailings mass balance summary

Tailings streams Percentage of Total Tailings

Percentage of Hydromet Tailings

Beneficiation tailings 90% - Hydromet tailings 10% - Total tailings 100% Hydromet tailings streams GSW (excluded from testing) 1.35% 13.45 % WLR 4.26% 42.57 % CR 1.12% 11.24 % WWR (IXR +OXR) 32.7% 32.73 % Total of hydromet tailings 10 % 100%

As a result of ongoing discussions between NML and Golder, the scope of work was modified from the characterisation of a combined flotation tailings and hydromet tailings sample, to the analysis of some of the individual components of the total tailings. This was done because alteration of the components and/or mixing ratio in the final tailings is likely to alter the chemistry and, therefore, reduce the transferability of the preliminary assessment to future work. Accordingly, individual geochemical analysis of the two tailings streams was chosen as the preferred option for this preliminary study. Determination of the geochemical characteristics of the tailings components allowed for mass-balance estimates of combined character to be made, with some reservation due to the missing GSW tailings stream. The estimated ratio of beneficiation to hydromet streams for the final tailings material is 90:10 (NML 2014b).

A sample of treated waste water from the waste water treatment plant (WWTP) was also analysed to provide data for use in design and environmental considerations, which are not part of Golder’s brief. The WWTP sample was sent for analysis, as received.

In summary the following samples were sent for geochemical analysis:

Solid hydromet tailings

Solid and liquid phases of the flotation tailings, as separated (in the analytical laboratory) from the slurry

Treated waste water (TWW) from the WWTP.

The analytical methods used to characterise the samples are listed in Section 4.0.

3.3 Sample origin The samples of flotation tailings and hydromet tailings used in the geochemical testwork were subsamples of material used for geotechnical and rheological test work, received at Golder between August and October 2013 (Golder, 2013).

Sample information provided to Golder by NML (NML, 2014a) is summarised below and in Table 2.

The ore sample used for the pilot plant at SGS comprised a drill core composite from the Wolverine area and a rotary core (RC) chip composite from Wolverine, Gambit West and Gambit areas of the project. The ratio of Wolverine, Gambit West and Gambit material was indicative of the resource. The beneficiation tailings sample was generated via flotation processing of ore by the first pilot plant run carried out at SGS Laboratories. The hydromet sample was generated by hydromet test work carried out at ALS Ammtec, using the concentrate produced during the same pilot plant run at SGS.



Table 2: Sample information (NML, 2014a)

Sample Mass, kg Total Rare Earth Oxide (TREO), %

Combined Ore used in Pilot Plant 1022 0.9878 Wolverine drill core composite 484 0.7795 Wolverine, Gambit West and Gambit RC chip composite 538 1.175

3.4 Sample delivery On 9 August 2013, a 200 L plastic drum containing approximately 200 L of flotation tailings material, at 16.3 % solids concentration by dry mass, was received by Golder’s Perth Geotechnical laboratory from NML.

On 16 October 2013, a plastic bucket containing four bags of dry materials that represent the components of the hydromet tailings, and a plastic bucket containing 20 L of TWW were received by Golder's Perth's Geotechnical Laboratory, from ALS Laboratories in Perth.

NML informed Golder that the hydromet tailings had been oven dried at 100°C by ALS to perform moisture content testing prior being delivered to Golder laboratory.

The total dry mass of hydromet tailings provided by ALS was 2.55 kg. The mass of each individual hydromet tailings streams were the following:

1000 g of WLR

200 g of CR

200 g of CR + WLR combined

950 g of WWR.

3.5 Sample preparation 3.5.1 Golder laboratory The hydromet tailings sample was prepared combining the WLR, CR and WWR tailings in accordance with the proportions presented in Table 1. On 25 October, 2013, approximately 500 g of the prepared hydromet tailings sample, 500 g equivalent dry mass of flotation tailings sample (with a measured solids concentration of 16.3% by mass) and TWW sample was sent to NATA-accredited ALS laboratory in Perth. Some procedures (ASLP, see Section 4.1) were undertaken at ALS Sydney. Shipping and handling of material (including sample splitting for distribution to the outlets of ALS) to Sydney was internally arranged by ALS.

3.5.2 ALS laboratory The solid hydromet sample was subsampled and analysed, as received with no washing or further drying. The liquid TWW sample was subsampled and analysed, as received. The flotation tailings sample was separated into solid and liquid phases by centrifuge.

ALS laboratories verbally notified Golder that the flotation tailings sample did not settle and was not easily filterable due to the amount of fines suspended in solution. Consequently, the sample was centrifuged. ALS indicated that the solids fraction from the centrifuge process comprised two components with distinct character: a fine sandy silt fraction that separated easily and a hygroscopic sludge (presumed to be the suspended material) that was very difficult to separate from solution.

The two solid fractions were recombined and homogenised prior to analysis of the flotation solids, since the centrifuge process was an operational amendment to the sample material for chemical analysis.



4.0 METHODS 4.1 Analysis suites Three suites of analysis were undertaken, namely a liquid analysis suite, a solid analysis suite and a solids leachate analysis suite. The purpose of the liquid and solid analysis suites was to characterise the content of the solid and liquid phases.

The solid suite of analysis was applied to the:

Solid fraction, inclusive of settled suspended solids, as separated from the flotation tailings sample via centrifuge

Solid hydromet sample, as received

The liquid suite of analysis was applied to the:

Process water, as separated from the flotation tailings sample

TWW sample

The leachate suite of analysis was applied to the liquid sample generated from a leachate test undertaken on both flotation and hydromet solids.

The purpose of the leachate analysis was to characterise the content of the solid material that is easily leachable using a mild leachant in a short timeframe. The Australian Standard Leachate Procedure (ASLP A4439.3) was applied as the standard leach test. The ASLP is frequently applied in preliminary assessments of the leachability of constituents of interest (COI) from environmental samples. The leachant used was deionised water, chosen to allow the analysis of dissolved nitrogen and sulfur species. The liquid to solid ratio of the test was 20:1.

4.2 Parameters analysed Parameters analysed for each analysis suite are as follows:

Solid suite (listed as soil on ALS laboratory certificates)

General parameters: Paste pH and electrical conductivity (EC) (saturated paste)

Net acid generating potential (NAPP, kg H2SO4/t) inclusive of:

Acid neutralising capacity (ANC)

Total sulfur and sulfate sulfur contents

Maximum potential acidity (MPA)

Net acid generation (NAG) test

Elemental analysis following extraction by acid digest: aluminium, antimony, arsenic, barium, beryllium, bismuth, boron, cadmium, chromium, cobalt, copper, iron, lead, lithium, manganese, mercury, molybdenum, nickel, selenium, silver, strontium, thallium, thorium, tin, uranium, vanadium and zinc

Liquid suite (listed as water on ALS laboratory certificates)

General parameters: pH, electrical conductivity (EC), acidity

Major cations: calcium, magnesium, potassium and sodium

Major anions: chloride, sulfur, sulfate, total and speciated alkalinity



Dissolved elements: extended suite including trace elements (aluminium, antimony, arsenic, barium, beryllium, bismuth, boron, cadmium, caesium, cerium, chromium, cobalt, copper, dysprosium, erbium, europium, gadolinium, gallium, hafnium, holmium, indium, iron, lanthanum, lead, lithium, lutetium, manganese, molybdenum, neodymium, nickel, praseodymium, rubidium, samarium, selenium, silicon, silver, strontium, tellurium, terbium, thallium, thorium, thulium, tin, titanium, uranium, vanadium, ytterbium, yttrium, zinc, and zirconium)

Nitrate, nitrite and total nitrogen

Phosphorus.

Leachate suite (listed as deionised water leachate on ALS laboratory certificates)

General parameters: pH, electrical conductivity, acidity

Major cations: calcium, magnesium, potassium and sodium

Major anions: chloride, sulfur, sulfate and total and speciated alkalinity

Dissolved elements: aluminium, antimony, arsenic, barium, beryllium, bismuth, boron, cerium, caesium, cobalt, copper, indium, iron, lead, lithium, manganese, mercury, molybdenum, nickel, rubidium, selenium, silicon, strontium, thallium, thorium, tin, titanium, uranium

Nitrate, nitrite and total nitrogen

Phosphorus.

5.0 RESULTS AND INTERPRETATION 5.1 Data presentation Results are shown in the laboratory test certificates provided in Appendix A. The certificates are the latest versions supplied by ALS on the 31 March 2014, which supersede previously presented versions.

A summary of results is presented in Tables 1B through 3B in Appendix B, where they are tabulated and compared to published guideline values for COIs.

5.2 Comparative Guidelines for Constituents of Interest The guidelines cited in Tables 1B through 3B in Appendix B were used to compare against results of the study and are intended to provide a basis for discussion. They do not represent directly applicable regulatory standards for tailings material, or leachates derived from them.

The following guidelines are compared:

Tailings solid samples:

Landfill Waste Classification and Waste Definitions 1996, for Class I/II, Class III, and Class IV waste.

Classification of potentially acid forming material (PAF) and non-acid forming material (NAF) based upon Australian best practice guidelines (AMIRA 2002) and recommended by GARD Guide (INAP 2012). The AMIRA classification guide is provided in Appendix C.

Water Samples:

ANZECC 2000 Groundwater (GW) long-term irrigation water protection values

ANZECC 2000 Livestock drinking water trigger values (low risk)



Leachate Samples:

ANZECC 2000 GW long-term Irrigation water protection values

ANZECC 2000 livestock drinking water trigger values (low risk)

Landfill Waste Classification and Waste Definitions 1996, specifically for the ASLP extraction method (1:20 solid to liquid ratio).

5.3 Quality assurance (QA) and quality control (QC) 5.3.1 Quality of analysis The laboratory facilities used in analysis of the samples received are NATA accredited. All analyses were subject to the laboratories’ own QA/QC procedures (see ALS QC report appended to laboratory certificates, Appendix A).

The chemistry of tailings material (solid and liquid) will be affected by storage times. The representativeness of the chemistry of the samples sent for analysis compared to the output from the process plant may be reduced as a result of the extended holding times. This effect is likely to be greater in the slurry sample and TWW sample than in the solid hydromet sample.

Sub-sampling for geochemical analysis was undertaken as soon as sample preparation at Golder was complete. Water samples were stored in a refrigerator prior to shipment to the laboratory (ALS Perth) for analysis. Breaches in holding time at the laboratory are highlighted in laboratory certificates for the analytes listed in Table 3. The results for analysis highlighted in Table 3 should be interpreted with additional caution in view of these breaches.

Table 3: Analytes with breached laboratory holding times as reported in laboratory QC certificate Sample Matrix Sample Type Sample Preparation

Breaches (Days) Sample Analysis Breaches (Days)

Solid

Hydromet tailings - pH (4 days) Flotation and hydromet tailings Sulfur as SO4 (19 days) - Flotation and hydromet tailings Total sulfur by LECO (12 days) - Flotation and hydromet tailings - ASLP leach (7 days)

Water

Flotation process water - pH (13 days) Treated waste water - pH (6 days) Flotation process water - Dissolved major cations (3 days) Treated waste water - Dissolved major cations (6 days) Flotation process water - Nitrite (10 days)

Holding times applied by the analytical laboratory from the date of sample receipt and are additional to the storage time of the samples before reaching the laboratory. Results for the flotation tailings will be most affected by the breaches in preparation time since the distribution of analytes between solid and liquid phase is subject to equilibrium controls that are time dependent on timescales that may exceed the holding time. The delay in pH analysis is likely to cause the result in the laboratory to differ from the tailings output stream in the field since pH is sensitive to equilibrium with the atmosphere.

5.4 General chemistry and acid producing potential 5.4.1 Flotation tailings The beneficiation tailings stream (flotation process, magnetic process or a combination) will constitute 90% of the deposited tailings by mass, based on current design assumptions.



Solid The flotation tailings solid phase is non-acid forming (NAF) based on the NAPP value of <0.5 kg H2SO4/t (Table 1B in Appendix B), from the AMIRA 2002 classification system (Appendix C). Acid neutralising capacity (ANC) was below limit of reporting (LOR, <0.5 kg H2SO4/t). Therefore, the sample does not have capacity to readily buffer acidity. The total sulfur result was also below LOR (<0.01 % by weight) and, therefore, maximum potential acidity (MPA), as calculated from total sulfur was also below LOR (<0.5 kg H2SO4/t). The NAGpH test result of (pH 6.3) corroborates the classification of the flotation tailings as NAF. It demonstrates that addition of a strong oxidising agent to oxidise the sulfides present in the sample does not result in acidification of the sample. The NAGpH result is above pH 4.5 and in combination with the <LOR NAPP result allows the material to be classified as NAF. The NAG-pH titration result of 6.3 kg H2SO4/t to pH 7.0 infers that a small amount of residual acidity may be from the formation of metal hydroxides in solution, or from neutralisation of acidity already in solution, in either case the presence and oxidation of sulfide minerals is not indicated.

Elevations within the flotation tailings solid were noted with respect to landfill waste classifications (as highlighted in Table 1B in Appendix B) for chromium (118 mg/kg), lead (5.6 mg/kg), molybdenum (16.2 mg/kg), nickel (97.8 mg/kg) and selenium (2 mg/kg).

Liquid (flotation tailings process water) The beneficiation plant will contribute approximately 75% of the liquid entering the TSF (NML 2014b). In the absence of significant rainfall, the liquid phase of the beneficiation sample will therefore constitute the majority of the recoverable pond decant and seepage waters from the TSF. The liquid phase of the slurry when separated from the tailings solid phase, was mildly alkaline (pH 8.1), with moderate bicarbonate alkalinity (248 mg/L) and some acidity (57 mg/L). Electrical conductivity (EC) was 1230 µS/cm and as a proxy for total salinity, was akin to slightly brackish waters.

The flotation tailings process water does not exceed the DoE ASLP Class I Landfill Waste Guidelines for the elements (mg/L) for which the criteria have been defined (refer Table 3B in Appendix B). The ASLP criteria are not directly applicable to the sample, but the process water is anticipated to be more concentrated than the ASLP leachate derived from an equivalent sample. Therefore, it is suggested that leachability of these elements is low compared to these criteria. However, elevations were noted with respect to ANZECC and DEC irrigation protection levels (as highlighted in Table 2B in Appendix B) for the following dissolved constituents of the flotation tailings process water:

Major ions and nutrients: sodium (256 mg/L), chloride (215 mg/L) and phosphorus (1.45 mg/L)

Metals and other elements of environmental interest: boron (0.13 mg/L), copper (0.334 mg/L), iron (3.2 mg/L), manganese (0.433 mg/L) and molybdenum (0.061 mg/L).

The elevated concentration of dissolved iron is of interest, but not necessarily of concern, since iron has a propensity to precipitate from solution at neutral to alkaline pH, as reported for flotation tailings and anticipated fully toxic conditions. Upon precipitation, iron may remove other metals and metalloids (e.g. copper and arsenic) from solution. The mechanisms may be variable depending on the geochemical environment, but could include sorption and or co-precipitation reactions of dissolved and colloidal iron, manganese and aluminium hydroxides. It should also be noted that the filter size used in the analysis of 'dissolved' metals (0.45 µm) will allow the passage of some colloidal material into the filtered sample. Therefore, a proportion of the reported concentrations of iron and manganese, and possibly other metals to a lesser extent, may be related to the presence of colloids in water at the time of the analysis.

Leaching test The flotation tailings solid was shown to have very limited capacity for continued supply of dissolved constituents to solution when leached with de-ionised (DI) water (20:1 liquid to solid ratio). DI water is a low ionic strength solution that may be considered to be a proxy for rainwater contacting the tailings after deposition. The quality of the leachate gives an indication of the mobility of elements that may be anticipated in time from the tailings storage facility once the process water has decanted or seeped through the tailings.



Leachate pH was alkaline (pH 9.4), EC was very low (60 µS/cm), alkalinity was low (2 mg/L) and acidity was below limit of reporting (LOR, <1 mg/L). This is anticipated given that the beneficiation process is likely to liberate many of the mobile constituents into the liquid phase of the flotation slurry. The 20:1 ASLP test is a standardised test that allows for comparison with landfill waste classifications. However, in reality the liquid to solid ration within the tailings may be lower due to the net evaporative climate and concentrations in pore waters.

The ASLP leachate derived from the floatation solids do not exceed the DoE ASLP Class I landfill waste guidelines for the elements (mg/L) for which the criteria have been defined. However, elevations were noted with respect to ANZECC and DEC irrigation protection levels (as highlighted in Table 2B in Appendix B) for the following dissolved constituents of the 20:1 leachate:

pH: Leachate and paste pH results are above (more alkaline) than ANZECC 2000 GW long term irrigation guidelines (pH 6-8.5)

Nutrients: phosphorus (0.55 mg/L, total as P)

Metals and other elements of environmental interest: aluminium (5.45 mg/L), copper (0.24 mg/L) and iron (4.83 mg/L).

Again, both iron and aluminium may present in the colloidal fraction, or may precipitate from solution and be beneficial for the retardation for metals and metalloids through sorption and co-precipitation reactions. This should be further investigated.

The saturated paste of the residual flotation solid with DI (2:1 liquid to solid ratio, Table 2B in Appendix B) water may be closer to the field scenario. During this test EC was moderate (646 µS/cm), and pH remained alkaline (pH 9.1). Consideration should be given to a modified leaching test with a lower liquid to solid (L:S) ratio in future analysis to reflect the field leaching regime. A lower L:S ratio will require more sample quantity in order to generate sufficient leachate for the analyses.

5.4.2 Hydromet tailings The hydromet tailings are currently anticipated to represent 10% of the deposited flow mass. The hydromet solid represents the output from the ore-enrichment process. Despite the proportionally low content of this stream in the final deposited tailings, the hydromet tailings is a concentrate of mineralisation, thus, its chemistry is likely to influence the geochemical properties of the combined tailings stream.

Solid The NAPP value of the hydromet tailings solid is calculated based on an assumption that sulfur in the sample (4.27 %, by weight, Table 1B in Appendix B) occurs as sulfide that will be acid forming when oxidised. This is generally a conservative assumption and may be corrected by subtraction of the sulfate-sulfur content. The hydromet sample has a high sulfate-sulfur content (SO4, 67 000 mg/kg), equivalent to 2.23% (by weight) from the total sulfur result of 4.27%. After applying this correction, the residual non-sulfate content remains high at 2.04%. A value of 2.04% total sulfur is equivalent to a NAPP of 62.5 kg H2SO4/t which is still net acid forming or potentially acid forming (PAF), and sufficiently high that net acid production should be anticipated from this stream. It is possible that other forms of sulfur contribute to the total sulfur content. However, this testing was not undertaken in this preliminary assessment.

The hydromet sample yielded a circumneutral NAGpH result of pH 6.3. According to AMIRA, this sample would be classified as uncertain (UC). However, samples with a high sulfide and/or metal content can cause interference by various factors including: 1) insufficient peroxide addition to allow oxidation of all sulfides in the sample; and 2) reducing reagent reactivity during the NAG test. This may account for the result of the NAGpH test being higher (less acidic) than expected based on NAPP. The PAF classification is based on the ANC result being below the LOR (<0.5 kg H2SO4/t) and a positive NAPP result (128 kg H2SO4/t or 62.5 kg H2SO4/t when considering sulfide-S only). However, this classification may be revised with additional information on sulfur speciation or on an updated hydromet tailings sample composition.



Given the very low buffering capacity of the solid sample and the high sulfide sulfur content, it is anticipated that the hydromet sample tested could acidify in time. Based on the preliminary testing, there is little data to base an assessment of the rate of reaction of sulfides upon, other than it appears that there is residual sulfide in the sample following the completion of sample storage, treatment and analysis. Ultimately it is the kinetics of acid producing and acid buffering reactions that determines if a sample will or will not acidify. The reactivity of sulfide minerals acid-buffering minerals and the occurrence or duration of a lag time until the onset of acidic drainage is not known. These characteristics could be better understood by conducting kinetic testing on the hydromet sample and/or on a recombined beneficiation-hydromet tailings sample (refer to recommendations Section 7.0).

Furthermore, when combined with the flotation tailings (90:10 flotation to hydromet ratio) the corrected sulfide- sulfur content of the combined tailings would be estimated to be low, approximately 0.2% (Table 4). The risk of acid formation form the combined tailings is likely low but may not be completely disregarded given the absence of buffering capacity in either tailings stream. Any increase in sulfide content of the mill feed may affect the potential of the tailings to be acid forming, and acidification of the pH in the tailings will enhance mobility of some EEIs.

Paste EC (8240 µS/cm) and sulfate content (67 000 mg/kg) of the hydromet solid sample were notably high. In addition, elevations were noted with respect to DoE 1996 Landfill Class I waste classifications (as highlighted in Table 1B in Appendix B) for arsenic (76.8 mg/kg), chromium (725 mg/kg), lead (37.5 mg/kg), molybdenum (144 mg/kg), nickel (404 mg/kg) and selenium (363 mg/kg).

The elevations for nickel and selenium are particularly high. This is expected given the mineral enrichment in the hydromet sample versus the beneficiation tailings. However, with the exception of arsenic, the same elements are also enriched in the beneficiation tailings but to a lower degree. Therefore, when a weighted average is calculated for the final tailings mixture (as shown in Table 4 on page 10), the content will remain elevated with respect to the guidelines presented for comparison in Table 1B (Appendix B).

Table 4: COI analysis results for the flotation, hydromet solid samples and combined. Sulfide sulfur calculated as balance after subtraction of sulfate sulfur from total sulfur.

COI Unit Flotation Solid

Hydromet Solid

90:10 Ratio Flotation to Hydromet Solid

(calculated)

DoE 1996 Landfill Class I Criteria (total mg/kg)

Total Sulfur %, by weight <0.01% 4.27% 0.44% N/A Sulfide Sulfur % by weight <0.01% 2.04% 0.21% N/A Arsenic mg/kg 1.9 76.8 9.4 14 Chromium mg/kg 118 725 178.7 10 Lead mg/kg 5.6 37.5 8.8 2 Molybdenum mg/kg 16.2 144 29.0 10 Nickel mg/kg 97.8 404 128.4 4 Selenium mg/kg 2 363 38.1 2

Leaching test Leachate from the hydromet solid (20:1, DI water) is circumneutral (pH 7.4) with low acidity (13 mg/L) but is also low in alkalinity (< LOR). The circumneutral pH may reflect short-term buffering from the consumption of immediately available alkalinity.

Elevations were noted with respect to ANZECC and DEC irrigation protection levels (as highlighted in Table 2B in Appendix B) for the following dissolved constituents of the 20:1 leachate:

Nutrients: phosphorus (2.47 mg/L, total as P)



Metals and other elements of environmental concern: boron (0.7 mg/L), manganese (0.261 mg/L) molybdenum (3.2 mg/L) and nickel (1.02 mg/L).

5.4.3 Treated waste water The treated waste water sample was mildly alkaline (pH 7.6), with 101 mg/L of bicarbonate alkalinity and 19 mg/L of acidity. EC was 13 500 µS/cm. Measured EC, as a proxy for total salinity, was akin to brackish waters. The major contributors to salinity were sulfate and magnesium.

Elevations were noted with respect to ANZECC and DEC irrigation protection levels (as highlighted in Table 3B in Appendix B) for the following dissolved constituents of the flotation tailings process water:

Major ions and nutrients: sodium (221 mg/L), sulfate (13 800 mg/L) chloride (169 mg/L) and phosphorus (5.94 mg/L)

Metals and other elements of environmental interest: arsenic (0.164 mg/L), boron (1.20 mg/L), molybdenum (0.092 mg/L).

Based on the analysis of water quality, these waters may require further treatment prior to environmental discharge or containment within water balance for the mine.

5.5 Potential effects of mixed tailings streams The effect of mixing is estimated based on the properties of two tailings streams analysed independently and mixed in a proportion of 90% flotation tailings and 10% hydromet tailings and excludes the GSW portion of the hydromet sample. The following estimate may differ from the actual properties of the recombined tailing. For this reason, it is strongly recommended that a sample that is representative of the final tailings composition is tested in future work.

The GSW output is anticipated to be comprised of largely gypsum (hydrated calcium sulfate) and to represent 13.4 % of the hydromet sample (1.3 % of mixed tailings). Substances other than gypsum present in this stream could modify the physical and chemical behaviour of the hydromet and overall sample, particularly with respect to leachability of elements.

The flotation tailings is NAF, while the hydromet tailings is likely to be PAF, largely based on its anticipated elevated sulfide content and low acid –buffering capacity. Given the mixing ratio and results of testing carried out in this study, the sulfide-sulfur content of the combined tailings is estimated to be low, approximately 0.2 %. The risk of acid formation form the combined tailings is uncertain; it will depend largely on the reactivity of sulfide minerals and buffering minerals in the tailings and on the actual sulfide content of the ore processed in the mill. Increases in sulfide content of the mill feed may affect the acid potential of the tailings.

The combined tailings are likely to have total elemental concentrations in excess of the DoE Class I landfill waste guidelines for chromium, lead, molybdenum, nickel and selenium (refer to Table 4 in Section 5.4.2). However, the exceedance of leachable ASLP guidelines for a combined sample has not been directly assessed. Based on the leachate analysis of the individual flotation and beneficiation tailings solid and analysis of the flotation process water, mobility of the elements named listed in Table 4 appear to be low. No exceedance with respect to ASLP Class I criteria (Tables 2B and 3B in Appendix B) are shown.

Conservative mixing behaviour cannot be assumed in complex samples, particularly when comparing concentrations, since the volume of liquid in the sample exerts a control on the concentration of a solute. The leachate test is carried out at a standardised solid to liquid ratio of 20:1 to allow comparison with published guidelines. Until the final tailings mixture is tested the environmental standards presented in Tables 1B to 3B (Appendix B) are for comparative purposes only. Other COIs in addition to the elements noted to be in exceedance to the displayed guidelines should remain worthy of consideration as EEIs in future testing.



The possibility that seepage and decanted water from the combined tailings may have elevated concentrations of dissolved COIs compared to site groundwater should be considered. The process water quality is anticipated to dominate the initial chemistry of the seepage and decanted water, and there are elevations with respect to ANZECC and DEC irrigation protection guidelines for a number of EEIs (Table 3B in Appendix B). Site specific groundwater data has not been considered here but development of site specific trigger values may be more appropriate in the long term as a comparator for environmental assessments. Based on our current understanding of the process streams and the results of preliminary analysis, it is our opinion that release of tailing contact waters via seepage into underlying groundwater or direct discharge of pond water may not be appropriate to meet with environmental compliance criteria. This is based on the observation that there are elevations in dissolved major ions (chloride and potassium), nutrients (phosphorus), boron, and metals (copper, iron, molybdenum and nickel) with respect to DEC and ANZECC irrigation guidance criteria. This requires further assessment once the final tailings composition is known and more representative leachates can be generated and analysed.

6.0 CONCLUSIONS The flotation tailings, which represent 90% of the combined tailings mass, are non-acid forming (NAF). These tailings have a low sulfur content but have a similarly low acid neutralisation capacity. Some chemical concentrations in the flotation process water exceed comparative acceptable thresholds for the protection of irrigation waters. It is possible that some elements are naturally elevated in the groundwater, and the guideline values (presented in this report for comparison) may not be the most appropriate values to use for the assessment of environmental impact. The development of site-specific trigger values for elements of environmental importance is therefore recommended.

The hydromet tailings, which will represent approximately 10% of the combined tailings mass, have been assessed to be potentially acid forming (PAF). This is based on the mass balance of acid neutralising capacity (ANC) and the maximum potential acidity (MPA), both expressed in units of H2SO4/t. MPA is calculated from the sulfur content (4.27%) and assumes that the sulfur occurs as acid forming pyrite. In reality, some of the measured sulfur is attributable to sulfate and the remaining sulfur may not be pyritic or highly reactive. Based on the sulfate analysis undertaken, approximately half the sulfur content was in the sulfate form. The remaining sulfur (2.04%), if conservatively assumed to be pyrite, has the potential to release an equivalent of 62.5 H2SO4/t. Currently the rate of release of acid is unknown and it will be important to assess whether this will be realised in the long term. The accelerated oxidation test (NAGpH) produced a leachate that was not classified as acidic (pH 6.3). However the attributes of the sample (high sulfur and trace metals) could have influenced the test result by reducing the efficiency of the sulfide oxidation.

Given the absence of significant buffering capacity for either the hydromet or beneficiation sample we can infer that the combined material is unlikely to be able to intrinsically buffer acid if released from the hydromet component of the tailings. Therefore, a conservative classification of PAF is considered appropriate for the combined tailings until further information is available.

Further testing is recommended (Section 7.0) to allow a better understanding of the overall geochemical behaviour of the combined material. To date, the outcomes of testwork do not consider the contribution from the GSW tailings stream, which forms 13% of the hydromet stream and may influence the classification result.

The flotation tailings are classified as NAF, while the hydromet tailings are classified as PAF. Given the mixing ratio (90 % flotation to 10% hydromet solids by dry mass) and results of testing carried out in this study, the sulfide-sulfur content of the combined tailings is estimated to be low, approximately 0.2 %. Low concentrations of sulfur may, however, be significant if there is very limited buffering capacity. Nevertheless, materials with a sulfur concentration of this magnitude are generally considered to represent a low risk. The risk of acid formation from the combined tailings is subject to uncertainty and will depend largely on the relative reactivity of minerals in the tailings and on the actual sulfide content of the ore processed in the mill.



The process water and contact water quality of flotation tailings and combined tailings may require control mechanisms (of seepage and/or water quality controls) before discharge. There is an enrichment of several metals of interest with respect to DoE 1996 landfill guidelines in both flotation and hydromet tailings solids for chromium, lead, molybdenum, nickel and selenium. Arsenic is also enriched in the hydromet sample and may be mobilised under reducing conditions. The flotation process water and the leachate derived from the flotation and hydromet solids do not exceed the DoE ASLP Class I waste guidelines for the elements for which the criteria have been defined. Therefore, leachability of these elements appears to be low compared to these criteria.

Other dissolved COIs measured in ASLP leachates (phosphorus, aluminium, boron, copper, iron, manganese, molybdenum, nickel) that are not included in the DoE ASLP Class I waste guidelines do show elevation with respect to published ANZECC/ARMCANZ 2000 or DEC guideline values for the protection of irrigation and livestock drinking water. However, these guidelines may not be directly applicable to the project.

Based on the results of the NAPP assessment, the hydromet tailings may produce acidic leachate if they were to be stored in isolation. However our understanding of the project process is that the hydromet will be co-mingled with the beneficiation tailings and deposited into TSF.

Whether the combined material is PAF or NAF is important in the consideration of tailings management options through life of mine and beyond closure. We advise that additional samples of hydromet tailings and representative samples of combined tailings be tested for acid generation potential and leachability to verify the results presented in this report before final design decisions are made. Currently the main source of low quality contact water is from leaching of the solid phases (particularly the hydromet sample).

Many metals are more mobile under acidic conditions and may be anticipated to show enhanced concentrations in leachates (should acidic conditions develop under the conditions stated above). A change in the pH of the solid/liquid interface may also alter the equilibrium of sorbed species and promote mineral dissolution, releasing COIs into solution.

The leaching conditions approached by the DI leach test do not account for acidity released over time or the higher mobility of metals in acidic conditions. A kinetic or sequential NAG test could provide laboratory data, with a short turnaround time (weeks) to aid this assessment. If a PAF classification is returned, long-term kinetic testing of the final tailings should be considered and initiated at the earliest opportunity. Long-term kinetic testwork (columns or humidity cells) typically require 6-12 months of data to verify sulfide reactivity and oxidation rates.

7.0 RECOMMENDATIONS Based on the outcomes of the geochemical testwork documented in this report we provide the following recommendations pertaining to the geochemical characterisation of the tailings:

Further testing should be undertaken on tailings material produced from the latest batch of beneficiation tailings, since this is likely to be more representative of the final tailings product. This testing should capture the effects arising from variability in the feed ore grade/composition. An assessment of variability may be achieved by capturing samples at the start and end of the pilot plant run. We recommend repeat analysis for key components of interest in new tailings in order to produce a more robust dataset on which to base project decisions.

Further testing should include kinetic or sequential NAG testing of the hydromet and combined tailings as a minimum to verify the assumption that the combined tailings will be non-acid forming (NAF). Long-term kinetic testing of the samples is also recommended to estimate sulfide oxidation rates that might be anticipated in the field.



8.0 LIMITATIONS The individual results are from a single sample of each of tailings streams. Analysis of a single sample precludes an assessment of the variability of results that may be anticipated due to sample heterogeneity.

Mass balance calculations based on anticipated flotation and hydromet mixing ratios are presented for discussion. They are based on the assumption that mass balance will be unaffected by mixing effects (described in Section 5.5). Commercially available gypsum was not included in the sample for geochemical testwork. The geochemical properties of the GSW, with respect to content of EEIs are unknown. The GSW may have the potential to include EEIs or other properties that may affect the mobility of these components of interest to this study.

Your attention is drawn to the document ‘Limitations’, which is included in Appendix D of this report. The statements presented in this document are intended to advise you of what your realistic expectations of this report should be, and to present you with recommendations on how to minimise the risks associated with this project. The document is not intended to reduce the level of responsibility accepted by Golder Associates, but rather to ensure that all parties who may rely on this report are aware of the responsibilities each assumes in so doing.

GOLDER ASSOCIATES PTY LTD

Alison Turner Karen Mackenzie Hydrogeochemist Principal Geochemist AT/KLM/hsl

A.B.N. 64 006 107 857 Golder, Golder Associates and the GA globe design are trademarks of Golder Associates Corporation.

\\golder.gds\gap\perth\jobs-mining\jobs413\design\137645044 - browns range tailings options\deliverables\137645044-011-r-rev2 - preliminary tailings geochemical assessment amd

potential.docx



REFERENCES AMIRA, 2002. ARD Test Handbook. Project P387A Prediction & Kinetic Control of Acid Mine Drainage. AMIRA International Ltd. Melbourne, Australia.

ANZECC/ARMCANZ, 2000. Australian and New Zealand guidelines for fresh and marine water quality.

DoE, 1996. Landfill waste classification and waste definitions 1996. Available online. Accessed on 15 January 2014.

Golder, 2013. Tailings geotechnical and rheological laboratory testing. Browns Range Project. Report number 137645044-005-R-Rev0, dated December 2013. Golder Associates Pty Ltd. Perth.

INAP, 2012. The global acid rock drainage guide (GARD). International Network for Acid Prevention (INAP). Available online. Accessed on 5 February 2014.

NML, 2014a. Sample origin information provided via email correspondence by Enje Catovic and Robin Jones (Northern Minerals Ltd) on 30 January 2014.

NML, 2014b. Revised process information provided via email correspondence by Lisa Chandler (Northern Minerals Ltd) on 23 May 2014.


June 2014 Report No. 137645044-011-R-Rev2

APPENDIX A Laboratory Chain of Custody and Certificates of Analysis

False

11 11.00False Environmental

CERTIFICATE OF ANALYSISWork Order : EP1308148 Page : 1 of 10

:Amendment 7:: LaboratoryClient Environmental Division PerthGOLDER ASSOCIATES

: :ContactContact RICARDO FANNI Scott James

:: AddressAddress PO BOX 1914

WEST PERTH WA 6872

10 Hod Way Malaga WA Australia 6090

:: E-mailE-mail [email protected] [email protected]

:: TelephoneTelephone +61 08 9213 7600 +61-8-9209 7655

:: FacsimileFacsimile +61 08 9427 7611 +61-8-9209 7600

:Project Browns Range QC Level : NEPM 2013 Schedule B(3) and ALS QCS3 requirement

:Order number ----

:C-O-C number ---- Date Samples Received : 25-OCT-2013

Sampler : H.C. Issue Date : 31-MAR-2014

Site : Browns Range

4:No. of samples received

Quote number : EP/825/13 V4 4:No. of samples analysed

This report supersedes any previous report(s) with this reference. Results apply to the sample(s) as submitted. All pages of this report have been checked and approved for

release.

This Certificate of Analysis contains the following information:

l General Comments

l Analytical Results

Environmental Division Perth ABN 84 009 936 029 Part of the ALS Group An ALS Limited Company

Address 10 Hod Way Malaga WA Australia 6090 | PHONE +61-8-9209 7655 | Facsimile +61-8-9209 7600

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EP1308148 Amendment 7

GOLDER ASSOCIATES

Browns Range:Project

General Comments

The analytical procedures used by the Environmental Division have been developed from established internationally recognized procedures such as those published by the USEPA, APHA, AS and NEPM. In house

developed procedures are employed in the absence of documented standards or by client request.

Where moisture determination has been performed, results are reported on a dry weight basis.

Where a reported less than (<) result is higher than the LOR, this may be due to primary sample extract/digestate dilution and/or insufficient sample for analysis.

Where the LOR of a reported result differs from standard LOR, this may be due to high moisture content, insufficient sample (reduced weight employed) or matrix interference.

When sampling time information is not provided by the client, sampling dates are shown without a time component. In these instances, the time component has been assumed by the laboratory for processing purposes.

Where a result is required to meet compliance limits the associated uncertainty must be considered. Refer to the ALS Contact for details.

CAS Number = CAS registry number from database maintained by Chemical Abstracts Services. The Chemical Abstracts Service is a division of the American Chemical Society.

LOR = Limit of reporting

^ = This result is computed from individual analyte detections at or above the level of reporting

Key :

07/02/2014: This report has been amended and re-released to allow the reporting of additional analytical data of total sulfur on the soil samples.l

19/02/2014: This report has been amended and re-released to allow the reporting of additional analytical data: total cations in soil.l

28/03/2014: This report has been amended and re-released to allow changes to the analytical datal

ASS: EA013 (ANC) Fizz Rating: 0- None; 1- Slight; 2- Moderate; 3- Strong; 4- Very Strong; 5- Lime.l

EG005T: Metals LOR for particular sample(s) raised due to significant matrix interference.l

Sample EP1308148-004 was filtered at 0.45µm before analysis.l

This document has been electronically signed by the authorized signatories indicated below. Electronic signing has been carried out in

compliance with procedures specified in 21 CFR Part 11.

Signatories Accreditation CategoryPosition

Benjamin Nicholson Metals Chemist Perth Inorganics

Canhuang Ke Metals Instrument Chemist Perth Inorganics

Chas Tucker Senior Inorganic Chemist Perth Inorganics

Efua Wilson Metals Chemist Perth Inorganics

Leanne Carey Acid Sulfate Soils Supervisor Perth ASS

SATISH.TRIVEDI 2 IC Acid Sulfate Soils Supervisor Brisbane Acid Sulphate Soils

NATA Accredited Laboratory 825

Accredited for compliance with

ISO/IEC 17025.

Signatories

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Analytical Results

------------137645044 Hydromet

Sample

137645044 Flotation

Tailings

16.3%

Client sample IDSub-Matrix: DI WATER LEACHATE (Matrix: WATER)

------------15-NOV-2013 12:0015-NOV-2013 12:00Client sampling date / time

------------EP1308148-002EP1308148-001UnitLORCAS NumberCompound

EA005P: pH by PC Titrator

pH Value 7.218.49 ---- ---- ----pH Unit0.01----

EA010P: Conductivity by PC Titrator

Electrical Conductivity @ 25°C 373060 ---- ---- ----µS/cm1----

ED037P: Alkalinity by PC Titrator

Hydroxide Alkalinity as CaCO3 <1<1 ---- ---- ----mg/L1DMO-210-001

Carbonate Alkalinity as CaCO3 <12 ---- ---- ----mg/L13812-32-6

Bicarbonate Alkalinity as CaCO3 <120 ---- ---- ----mg/L171-52-3

Total Alkalinity as CaCO3 <121 ---- ---- ----mg/L1----

ED038A: Acidity

Acidity as CaCO3 13<1 ---- ---- ----mg/L1----

ED040T: Total Major Anions

Sulfate as SO4 2- 28502 ---- ---- ----mg/L114808-79-8

Sulfur as S 950<1 ---- ---- ----mg/L163705-05-5

ED040W: Water Leachable Sulfate by ICPAES

Silicon 13.723.1 ---- ---- ----mg/L0.057440-21-3

Sulfur as S 9161 ---- ---- ----mg/L163705-05-5

ED041G: Sulfate (Turbidimetric) as SO4 2- by DA

Sulfate as SO4 - Turbidimetric 30103 ---- ---- ----mg/L114808-79-8

ED045G: Chloride Discrete analyser

Chloride 46 ---- ---- ----mg/L116887-00-6

ED093F: Dissolved Major Cations

Calcium 604<1 ---- ---- ----mg/L17440-70-2

Magnesium 465<1 ---- ---- ----mg/L17439-95-4

Sodium 916 ---- ---- ----mg/L17440-23-5

Potassium 162 ---- ---- ----mg/L17440-09-7

EG020W: Water Leachable Metals by ICP-MS

Aluminium 0.015.45 ---- ---- ----mg/L0.017429-90-5

Antimony 0.0030.001 ---- ---- ----mg/L0.0017440-36-0

Arsenic 0.0660.004 ---- ---- ----mg/L0.0017440-38-2

Beryllium <0.001<0.001 ---- ---- ----mg/L0.0017440-41-7

Barium 0.0460.622 ---- ---- ----mg/L0.0017440-39-3

Bismuth <0.001<0.001 ---- ---- ----mg/L0.0017440-69-9

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Analytical Results

------------137645044 Hydromet

Sample

137645044 Flotation

Tailings

16.3%




EG020W: Water Leachable Metals by ICP-MS - Continued

Cerium <0.0010.026 ---- ---- ----mg/L0.0017440-45-1

Caesium 0.0010.001 ---- ---- ----mg/L0.0017440-46-2

Cobalt 0.0210.003 ---- ---- ----mg/L0.0017440-48-4

Copper 0.0020.242 ---- ---- ----mg/L0.0017440-50-8

Indium <0.001<0.001 ---- ---- ----mg/L0.0017440-74-6

Lead <0.0010.028 ---- ---- ----mg/L0.0017439-92-1

Lithium 0.0680.005 ---- ---- ----mg/L0.0017439-93-2

Manganese 0.2610.098 ---- ---- ----mg/L0.0017439-96-5

Molybdenum 3.200.004 ---- ---- ----mg/L0.0017439-98-7

Nickel 1.020.050 ---- ---- ----mg/L0.0017440-02-0

Rubidium 0.0360.009 ---- ---- ----mg/L0.0017440-17-7

Selenium <0.01<0.01 ---- ---- ----mg/L0.017782-49-2

Strontium 6.020.044 ---- ---- ----mg/L0.0017440-24-6

Thallium <0.001<0.001 ---- ---- ----mg/L0.0017440-28-0

Thorium <0.0010.007 ---- ---- ----mg/L0.0017440-29-1

Tin <0.0010.001 ---- ---- ----mg/L0.0017440-31-5

Titanium <0.01<0.01 ---- ---- ----mg/L0.017440-32-6

Uranium <0.0010.005 ---- ---- ----mg/L0.0017440-61-1

Zinc <0.0050.115 ---- ---- ----mg/L0.0057440-66-6

Boron 0.700.11 ---- ---- ----mg/L0.057440-42-8

Iron <0.054.83 ---- ---- ----mg/L0.057439-89-6

EG035W: Water Leachable Mercury by FIMS

Mercury ----<0.0001 ---- ---- ----mg/L0.00017439-97-6

EK057G: Nitrite as N by Discrete Analyser

Nitrite as N <0.01<0.01 ---- ---- ----mg/L0.01----

EK058G: Nitrate as N by Discrete Analyser

Nitrate as N 0.030.01 ---- ---- ----mg/L0.0114797-55-8

EK059G: Nitrite plus Nitrate as N (NOx) by Discrete Analyser

Nitrite + Nitrate as N 0.030.01 ---- ---- ----mg/L0.01----

EK067G: Total Phosphorus as P by Discrete Analyser

Total Phosphorus as P 2.470.55 ---- ---- ----mg/L0.01----

EN055: Ionic Balance

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Analytical Results

------------137645044 Hydromet

Sample

137645044 Flotation

Tailings

16.3%




EN055: Ionic Balance - Continued

Total Anions 62.80.65 ---- ---- ----meq/L0.01----

Total Cations 69.20.75 ---- ---- ----meq/L0.01----

Ionic Balance 4.88---- ---- ---- ----%0.01----

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Analytical Results

------------137645044 Hydromet

Sample

137645044 Flotation

Tailings

16.3%

Client sample IDSub-Matrix: SOIL (Matrix: SOIL)

------------25-OCT-2013 10:0025-OCT-2013 10:00Client sampling date / time


EA009: Nett Acid Production Potential

Net Acid Production Potential 128<0.5 ---- ---- ----kg H2SO4/t0.5----

EA011: Net Acid Generation

pH (OX) 6.36.1 ---- ---- ----pH Unit0.1----

NAG (pH 4.5) <0.1<0.1 ---- ---- ----kg H2SO4/t0.1----

NAG (pH 7.0) 1.36.3 ---- ---- ----kg H2SO4/t0.1----

EA013: Acid Neutralising Capacity

ANC as H2SO4 3.0<0.5 ---- ---- ----kg H2SO4

equiv./t

0.5----

ANC as CaCO3 0.3<0.1 ---- ---- ----% CaCO30.1----

Fizz Rating 00 ---- ---- ----Fizz Unit0----

EA031: pH (saturated paste)

pH (Saturated Paste) 6.98.9 ---- ---- ----pH Unit0.1----

EA032: Electrical Conductivity (saturated paste)

Electrical Conductivity (Saturated Paste) 8240646 ---- ---- ----µS/cm1----

EA055: Moisture Content

Moisture Content (dried @ 103°C) 4.544.7 ---- ---- ----%1.0----

ED040: Sulfur as SO4 2-

Sulfate as SO4 2- 67000130 ---- ---- ----mg/kg10014808-79-8

ED042T: Total Sulfur by LECO

Sulfur - Total as S (LECO) 4.27<0.01 ---- ---- ----%0.01----

ED093T: Total Major Cations

Sodium 210860 ---- ---- ----mg/kg507440-23-5

Potassium 5101000 ---- ---- ----mg/kg507440-09-7

Calcium 32400540 ---- ---- ----mg/kg507440-70-2

Magnesium 9440370 ---- ---- ----mg/kg507439-95-4

EG005T: Total Metals by ICP-AES

Aluminium 30005190 ---- ---- ----mg/kg507429-90-5

Boron <50<50 ---- ---- ----mg/kg507440-42-8

Iron 1820041200 ---- ---- ----mg/kg507439-89-6

EG020T: Total Metals by ICP-MS

Arsenic 76.81.9 ---- ---- ----mg/kg0.17440-38-2

Selenium 3632 ---- ---- ----mg/kg17782-49-2

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Analytical Results

------------137645044 Hydromet

Sample

137645044 Flotation

Tailings

16.3%

Client sample IDSub-Matrix: SOIL (Matrix: SOIL)



EG020T: Total Metals by ICP-MS - Continued

Silver 4.2<0.1 ---- ---- ----mg/kg0.17440-22-4

Barium 38.662.4 ---- ---- ----mg/kg0.17440-39-3

Thallium <0.1<0.1 ---- ---- ----mg/kg0.17440-28-0

Beryllium 0.20.2 ---- ---- ----mg/kg0.17440-41-7

Cadmium <0.1<0.1 ---- ---- ----mg/kg0.17440-43-9

Bismuth 2.10.1 ---- ---- ----mg/kg0.17440-69-9

Cobalt 14.02.3 ---- ---- ----mg/kg0.17440-48-4

Chromium 725118 ---- ---- ----mg/kg0.17440-47-3

Copper 61.343.9 ---- ---- ----mg/kg0.17440-50-8

Thorium 1453.0 ---- ---- ----mg/kg0.17440-29-1

Manganese 23.226.5 ---- ---- ----mg/kg0.17439-96-5

Strontium 177013.7 ---- ---- ----mg/kg0.17440-24-6

Molybdenum 14416.2 ---- ---- ----mg/kg0.17439-98-7

Nickel 40497.8 ---- ---- ----mg/kg0.17440-02-0

Lead 37.55.6 ---- ---- ----mg/kg0.17439-92-1

Antimony 2.00.2 ---- ---- ----mg/kg0.17440-36-0

Uranium 1412.3 ---- ---- ----mg/kg0.17440-61-1

Zinc 15.110.9 ---- ---- ----mg/kg0.57440-66-6

Lithium 2.80.6 ---- ---- ----mg/kg0.17439-93-2

Vanadium 23 ---- ---- ----mg/kg17440-62-2

Tin 10.42.0 ---- ---- ----mg/kg0.17440-31-5

EG035T: Total Recoverable Mercury by FIMS

Mercury <0.1<0.1 ---- ---- ----mg/kg0.17439-97-6

EN60: Bottle Leaching Procedure

Final pH 7.49.4 ---- ---- ----pH Unit0.1----

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Analytical Results

------------137645044 Flotation

Tailings

16.3%

137645044 Treated

Waste Water

Client sample IDSub-Matrix: WATER (Matrix: WATER)




pH Value 8.077.66 ---- ---- ----pH Unit0.01----

EA010P: Conductivity by PC Titrator

Electrical Conductivity @ 25°C 123013500 ---- ---- ----µS/cm1----


Hydroxide Alkalinity as CaCO3 <1<1 ---- ---- ----mg/L1DMO-210-001

Carbonate Alkalinity as CaCO3 <1<1 ---- ---- ----mg/L13812-32-6

Bicarbonate Alkalinity as CaCO3 248101 ---- ---- ----mg/L171-52-3

Total Alkalinity as CaCO3 248101 ---- ---- ----mg/L1----

ED038A: Acidity

Acidity as CaCO3 5719 ---- ---- ----mg/L1----

ED040F: Dissolved Major Anions

Sulfate as SO4 2- 6813800 ---- ---- ----mg/L114808-79-8

Sulfur as S 224590 ---- ---- ----mg/L163705-05-5

Silicon as SiO2 1629.3 ---- ---- ----mg/L0.114464-46-1

Silicon 75.84.36 ---- ---- ----mg/L0.057440-21-3

ED041G: Sulfate (Turbidimetric) as SO4 2- by DA

Sulfate as SO4 - Turbidimetric 7214300 ---- ---- ----mg/L114808-79-8

ED045G: Chloride Discrete analyser

Chloride 215169 ---- ---- ----mg/L116887-00-6


Calcium 4511 ---- ---- ----mg/L17440-70-2

Magnesium 33460 ---- ---- ----mg/L17439-95-4

Sodium 256221 ---- ---- ----mg/L17440-23-5

Potassium 16211 ---- ---- ----mg/L17440-09-7

EG020F: Dissolved Metals by ICP-MS

Aluminium 2.380.03 ---- ---- ----mg/L0.017429-90-5

Dysprosium 0.053<0.001 ---- ---- ----mg/L0.0017429-91-6

Silver <0.001<0.001 ---- ---- ----mg/L0.0017440-22-4

Arsenic 0.0120.164 ---- ---- ----mg/L0.0017440-38-2

Bismuth <0.001<0.001 ---- ---- ----mg/L0.0017440-69-9

Erbium 0.031<0.001 ---- ---- ----mg/L0.0017440-52-0

Boron 0.131.20 ---- ---- ----mg/L0.057440-42-8

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Analytical Results

------------137645044 Flotation

Tailings

16.3%

137645044 Treated

Waste Water




EG020F: Dissolved Metals by ICP-MS - Continued

Europium <0.001<0.001 ---- ---- ----mg/L0.0017440-53-1

Strontium 0.0942.65 ---- ---- ----mg/L0.0017440-24-6

Barium 0.3740.008 ---- ---- ----mg/L0.0017440-39-3

Gadolinium 0.035<0.001 ---- ---- ----mg/L0.0017440-54-2

Titanium 0.020.01 ---- ---- ----mg/L0.017440-32-6

Beryllium <0.001<0.001 ---- ---- ----mg/L0.0017440-41-7

Gallium <0.001<0.001 ---- ---- ----mg/L0.0017440-55-3

Cadmium 0.00010.0003 ---- ---- ----mg/L0.00017440-43-9

Hafnium <0.01<0.01 ---- ---- ----mg/L0.017440-58-6

Tellurium <0.005<0.005 ---- ---- ----mg/L0.00522541-49-7

Cobalt 0.0050.008 ---- ---- ----mg/L0.0017440-48-4

Holmium 0.011<0.001 ---- ---- ----mg/L0.0017440-60-0

Uranium 0.007<0.001 ---- ---- ----mg/L0.0017440-61-1

Caesium <0.0010.010 ---- ---- ----mg/L0.0017440-46-2

Chromium 0.0180.038 ---- ---- ----mg/L0.0017440-47-3

Indium <0.001<0.001 ---- ---- ----mg/L0.0017440-74-6

Copper 0.3340.012 ---- ---- ----mg/L0.0017440-50-8

Lanthanum 0.020<0.001 ---- ---- ----mg/L0.0017439-91-0

Rubidium 0.0050.379 ---- ---- ----mg/L0.0017440-17-7

Lithium 0.0110.992 ---- ---- ----mg/L0.0017439-93-2

Lutetium 0.004<0.001 ---- ---- ----mg/L0.0017439-94-3

Thorium 0.002<0.001 ---- ---- ----mg/L0.0017440-29-1

Cerium 0.039<0.001 ---- ---- ----mg/L0.0017440-45-1

Manganese 0.4330.192 ---- ---- ----mg/L0.0017439-96-5

Neodymium 0.058<0.001 ---- ---- ----mg/L0.0017440-00-8

Molybdenum 0.0610.092 ---- ---- ----mg/L0.0017439-98-7

Praseodymium 0.010<0.001 ---- ---- ----mg/L0.0017440-10-0

Nickel 0.0710.212 ---- ---- ----mg/L0.0017440-02-0

Samarium 0.019<0.001 ---- ---- ----mg/L0.0017440-19-9

Lead 0.030<0.001 ---- ---- ----mg/L0.0017439-92-1

Terbium 0.008<0.001 ---- ---- ----mg/L0.0017440-27-9

Antimony 0.002<0.001 ---- ---- ----mg/L0.0017440-36-0

Thulium 0.004<0.001 ---- ---- ----mg/L0.0017440-30-4

10 of 10:Page

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Analytical Results

------------137645044 Flotation

Tailings

16.3%

137645044 Treated

Waste Water




EG020F: Dissolved Metals by ICP-MS - Continued

Selenium <0.01<0.01 ---- ---- ----mg/L0.017782-49-2

Ytterbium 0.024<0.001 ---- ---- ----mg/L0.0017440-64-4

Tin 0.002<0.001 ---- ---- ----mg/L0.0017440-31-5

Yttrium 0.238<0.001 ---- ---- ----mg/L0.0017440-65-5

Thallium <0.001<0.001 ---- ---- ----mg/L0.0017440-28-0

Zirconium <0.005<0.005 ---- ---- ----mg/L0.0057440-67-7

Vanadium <0.010.06 ---- ---- ----mg/L0.017440-62-2

Zinc 0.1040.006 ---- ---- ----mg/L0.0057440-66-6

Iron 3.20<0.05 ---- ---- ----mg/L0.057439-89-6


Nitrite as N <0.01<0.01 ---- ---- ----mg/L0.01----

EK058G: Nitrate as N by Discrete Analyser

Nitrate as N <0.010.22 ---- ---- ----mg/L0.0114797-55-8

EK059G: Nitrite plus Nitrate as N (NOx) by Discrete Analyser

Nitrite + Nitrate as N <0.010.22 ---- ---- ----mg/L0.01----


Total Phosphorus as P 1.455.94 ---- ---- ----mg/L0.01----

EN055: Ionic Balance

Total Anions 12.5296 ---- ---- ----meq/L0.01----

Total Cations 12.0325 ---- ---- ----meq/L0.01----

Ionic Balance 2.194.66 ---- ---- ----%0.01----

False 11 11.00False

Environmental

QUALITY CONTROL REPORTWork Order : EP1308148 Page : 1 of 27

:Amendment 7

:: LaboratoryClient Environmental Division PerthGOLDER ASSOCIATES



WEST PERTH WA 6872






Site : Browns Range


Sampler : H.C. Issue Date : 31-MAR-2014

:Order number ----

4:No. of samples received

Quote number : EP/825/13 V4 4:No. of samples analysed

This report supersedes any previous report(s) with this reference. Results apply to the sample(s) as submitted. All pages of this report have been checked and approved for

release.

This Quality Control Report contains the following information:

l Laboratory Duplicate (DUP) Report; Relative Percentage Difference (RPD) and Acceptance Limits

l Method Blank (MB) and Laboratory Control Spike (LCS) Report ; Recovery and Acceptance Limits

l Matrix Spike (MS) Report; Recovery and Acceptance Limits



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General Comments

The analytical procedures used by the Environmental Division have been developed from established internationally recognized procedures such as those published by the USEPA, APHA, AS and NEPM. In house

developed procedures are employed in the absence of documented standards or by client request.

Where moisture determination has been performed, results are reported on a dry weight basis.

Where a reported less than (<) result is higher than the LOR, this may be due to primary sample extract/digestate dilution and/or insufficient sample for analysis.

Where the LOR of a reported result differs from standard LOR, this may be due to high moisture content, insufficient sample (reduced weight employed) or matrix interference.

Anonymous = Refers to samples which are not specifically part of this work order but formed part of the QC process lot

CAS Number = CAS registry number from database maintained by Chemical Abstracts Services. The Chemical Abstracts Service is a division of the American Chemical Society.

LOR = Limit of reporting

RPD = Relative Percentage Difference

# = Indicates failed QC

Key :

This document has been electronically signed by the authorized signatories indicated below. Electronic signing has been carried out in compliance with

procedures specified in 21 CFR Part 11.

Signatories Accreditation CategoryPosition

Benjamin Nicholson Metals Chemist Perth Inorganics

Canhuang Ke Metals Instrument Chemist Perth Inorganics

Chas Tucker Senior Inorganic Chemist Perth Inorganics

Efua Wilson Metals Chemist Perth Inorganics

Leanne Carey Acid Sulfate Soils Supervisor Perth ASS

SATISH.TRIVEDI 2 IC Acid Sulfate Soils Supervisor Brisbane Acid Sulphate Soils

SignatoriesNATA Accredited

Laboratory 825

Accredited for

compliance with

ISO/IEC 17025.

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Laboratory Duplicate (DUP) Report

The quality control term Laboratory Duplicate refers to a randomly selected intralaboratory split. Laboratory duplicates provide information regarding method precision and sample heterogeneity. The permitted ranges

for the Relative Percent Deviation (RPD) of Laboratory Duplicates are specified in ALS Method QWI -EN/38 and are dependent on the magnitude of results in comparison to the level of reporting: Result < 10 times LOR:-

No Limit; Result between 10 and 20 times LOR:- 0% - 50%; Result > 20 times LOR:- 0% - 20%.

Sub-Matrix: SOIL Laboratory Duplicate (DUP) Report

Original Result RPD (%)Laboratory sample ID Client sample ID Method: Compound CAS Number LOR Unit Duplicate Result Recovery Limits (%)

EA011: Net Acid Generation (QC Lot: 3137387)

EA011: NAG (pH 4.5) ---- 0.1 kg H2SO4/t <0.1 <0.1 0.0 No Limit137645044 Hydromet

Sample

EP1308148-002

EA011: NAG (pH 7.0) ---- 0.1 kg H2SO4/t 1.3 1.3 0.0 0% - 50%

EA011: pH (OX) ---- 0.1 pH Unit 6.3 6.4 0.0 0% - 20%

EA011: Net Acid Generation (QC Lot: 3145058)

EA011: NAG (pH 4.5) ---- 0.1 kg H2SO4/t <0.1 <0.1 0.0 No Limit137645044 Flotation

Tailings 16.3%

EP1308148-001

EA011: NAG (pH 7.0) ---- 0.1 kg H2SO4/t 6.3 6.5 3.1 0% - 20%

EA011: pH (OX) ---- 0.1 pH Unit 6.1 6.0 0.0 0% - 20%

EA013: Acid Neutralising Capacity (QC Lot: 3137386)

EA013: ANC as H2SO4 ---- 0.5 kg H2SO4 equ 3.0 3.0 0.0 No Limit137645044 Hydromet

Sample

EP1308148-002

EA013: Acid Neutralising Capacity (QC Lot: 3145057)

EA013: ANC as H2SO4 ---- 0.5 kg H2SO4 equ <0.5 <0.5 0.0 No Limit137645044 Flotation

Tailings 16.3%

EP1308148-001

EA031: pH (saturated paste) (QC Lot: 3153648)

EA031: pH (Saturated Paste) ---- 0.1 pH Unit 6.9 6.9 0.0 0% - 20%137645044 Hydromet

Sample

EP1308148-002

EA032: Electrical Conductivity (saturated paste) (QC Lot: 3153649)

EA032: Electrical Conductivity (Saturated Paste) ---- 1 µS/cm 8240 8130 1.3 0% - 20%137645044 Hydromet

Sample

EP1308148-002

EA055: Moisture Content (QC Lot: 3147048)

EA055-103: Moisture Content (dried @ 103°C) ---- 1.0 % 4.4 4.4 0.0 No Limit137645044 Hydromet

Sample

EP1308148-002

ED040T : Total Sulfate by ICPAES (QC Lot: 3168841)

ED040T: Sulfate as SO4 2- 14808-79-8 100 mg/kg 130 120 10.3 No Limit137645044 Flotation

Tailings 16.3%

EP1308148-001

ED042T: Total Sulfur by LECO (QC Lot: 3155740)

ED042T: Sulfur - Total as S (LECO) ---- 0.01 % <0.01 0.01 0.0 No Limit137645044 Flotation

Tailings 16.3%

EP1308148-001

ED093T: Total Major Cations (QC Lot: 3303399)

ED093T: Sodium 7440-23-5 50 mg/kg 210 230 9.7 No Limit137645044 Hydromet

Sample

EP1308148-002

ED093T: Potassium 7440-09-7 50 mg/kg 510 560 8.9 0% - 50%

ED093T: Calcium 7440-70-2 50 mg/kg 32400 34900 7.7 0% - 20%

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ED093T: Total Major Cations (QC Lot: 3303399) - continued

ED093T: Magnesium 7439-95-4 50 mg/kg 9440 10400 9.6 0% - 20%137645044 Hydromet

Sample

EP1308148-002

EG005T: Total Metals by ICP-AES (QC Lot: 3155706)

EG005T: Aluminium 7429-90-5 50 mg/kg 3000 3100 3.1 0% - 20%137645044 Hydromet

Sample

EP1308148-002

EG005T: Boron 7440-42-8 50 mg/kg <50 <50 0.0 No Limit

EG005T: Iron 7439-89-6 50 mg/kg 18200 16600 8.7 0% - 20%

EG020T: Total Metals by ICP-MS (QC Lot: 3140536)

EG020X-T: Arsenic 7440-38-2 0.1 mg/kg 76.8 75.5 1.7 0% - 20%137645044 Hydromet

Sample

EP1308148-002

EG020X-T: Barium 7440-39-3 0.1 mg/kg 38.6 38.9 0.8 0% - 20%

EG020X-T: Beryllium 7440-41-7 0.1 mg/kg 0.2 0.2 0.0 No Limit

EG020X-T: Cobalt 7440-48-4 0.1 mg/kg 14.0 13.9 0.0 0% - 20%

EG020X-T: Chromium 7440-47-3 0.1 mg/kg 725 770 6.1 0% - 20%

EG020X-T: Copper 7440-50-8 0.1 mg/kg 61.3 64.4 4.9 0% - 20%

EG020X-T: Manganese 7439-96-5 0.1 mg/kg 23.2 20.3 13.5 0% - 20%

EG020X-T: Molybdenum 7439-98-7 0.1 mg/kg 144 171 16.8 0% - 20%

EG020X-T: Nickel 7440-02-0 0.1 mg/kg 404 387 4.1 0% - 20%

EG020X-T: Lead 7439-92-1 0.1 mg/kg 37.5 36.0 3.8 0% - 20%

EG020X-T: Antimony 7440-36-0 0.1 mg/kg 2.0 2.3 12.5 0% - 20%

EG020X-T: Uranium 7440-61-1 0.1 mg/kg 141 171 19.4 0% - 20%

EG020X-T: Lithium 7439-93-2 0.1 mg/kg 2.8 0.5 # 141 0% - 20%

EG020X-T: Tin 7440-31-5 0.1 mg/kg 10.4 11.2 7.2 0% - 20%

EG020X-T: Zinc 7440-66-6 0.5 mg/kg 15.1 16.9 11.0 0% - 20%

EG020X-T: Vanadium 7440-62-2 1 mg/kg 2 2 0.0 No Limit


EG020Y-T: Thallium 7440-28-0 0.1 mg/kg <0.1 <0.1 0.0 No Limit137645044 Hydromet

Sample

EP1308148-002

EG020Y-T: Cadmium 7440-43-9 0.1 mg/kg <0.1 <0.1 0.0 No Limit

EG020Y-T: Bismuth 7440-69-9 0.1 mg/kg 2.1 2.4 16.3 0% - 20%

EG020Y-T: Thorium 7440-29-1 0.1 mg/kg 145 168 14.5 0% - 20%

EG020Y-T: Selenium 7782-49-2 1 mg/kg 363 403 10.5 0% - 20%


EG020Z-T: Silver 7440-22-4 0.1 mg/kg 4.2 4.7 10.5 0% - 20%137645044 Hydromet

Sample

EP1308148-002


EG020X-T: Arsenic 7440-38-2 0.1 mg/kg ---- 67.6 # Not

Determined

0% - 20%137645044 Hydromet

Sample

EP1308148-002

EG020X-T: Barium 7440-39-3 0.1 mg/kg ---- 36.0 # Not

Determined

0% - 20%

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EG020T: Total Metals by ICP-MS (QC Lot: 3155707) - continued

EG020X-T: Beryllium 7440-41-7 0.1 mg/kg ---- 0.3 # Not

Determined

No Limit137645044 Hydromet

Sample

EP1308148-002

EG020X-T: Cobalt 7440-48-4 0.1 mg/kg ---- 15.2 # Not

Determined

0% - 20%

EG020X-T: Chromium 7440-47-3 0.1 mg/kg ---- 215 # Not

Determined

0% - 20%

EG020X-T: Copper 7440-50-8 0.1 mg/kg ---- 73.0 # Not

Determined

0% - 20%

EG020X-T: Manganese 7439-96-5 0.1 mg/kg ---- 24.9 # Not

Determined

0% - 20%

EG020X-T: Molybdenum 7439-98-7 0.1 mg/kg ---- 132 # Not

Determined

0% - 20%

EG020X-T: Nickel 7440-02-0 0.1 mg/kg ---- 401 # Not

Determined

0% - 20%

EG020X-T: Lead 7439-92-1 0.1 mg/kg ---- 41.5 # Not

Determined

0% - 20%

EG020X-T: Antimony 7440-36-0 0.1 mg/kg ---- 1.9 # Not

Determined

0% - 50%

EG020X-T: Uranium 7440-61-1 0.1 mg/kg ---- 139 # Not

Determined

0% - 20%

EG020X-T: Lithium 7439-93-2 0.1 mg/kg ---- 0.8 # Not

Determined

No Limit

EG020X-T: Tin 7440-31-5 0.1 mg/kg ---- 8.4 # Not

Determined

0% - 20%

EG020X-T: Zinc 7440-66-6 0.5 mg/kg ---- 16.9 # Not

Determined

0% - 20%

EG020X-T: Vanadium 7440-62-2 1 mg/kg ---- 2 # Not

Determined

No Limit


EG020Y-T: Thallium 7440-28-0 0.1 mg/kg ---- <0.1 # Not

Determined

No Limit137645044 Hydromet

Sample

EP1308148-002

EG020Y-T: Cadmium 7440-43-9 0.1 mg/kg ---- <0.1 # Not

Determined

No Limit

EG020Y-T: Bismuth 7440-69-9 0.1 mg/kg ---- 2.4 # Not

Determined

0% - 20%

EG020Y-T: Thorium 7440-29-1 0.1 mg/kg ---- 144 # Not

Determined

0% - 20%

EG020Y-T: Selenium 7782-49-2 1 mg/kg ---- 377 # Not

Determined

0% - 20%


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EG020T: Total Metals by ICP-MS (QC Lot: 3155709) - continued

EG020Z-T: Silver 7440-22-4 0.1 mg/kg ---- 4.2 # Not

Determined

0% - 20%137645044 Hydromet

Sample

EP1308148-002

EG035T: Total Recoverable Mercury by FIMS (QC Lot: 3166589)

EG035T: Mercury 7439-97-6 0.1 mg/kg <0.1 <0.1 0.0 No Limit137645044 Hydromet

Sample

EP1308148-002

Sub-Matrix: WATER Laboratory Duplicate (DUP) Report


EA005P: pH by PC Titrator (QC Lot: 3136280)

EA005-P: pH Value ---- 0.01 pH Unit 7.66 7.68 0.3 0% - 20%137645044 Treated Waste

Water

EP1308148-003

EA005-P: pH Value ---- 0.01 pH Unit 8.38 8.43 0.6 0% - 20%AnonymousEP1308219-001





EA005-P: pH Value ---- 0.01 pH Unit 7.21 7.17 0.6 0% - 20%137645044 Hydromet

Sample

EP1308148-002

EA010P: Conductivity by PC Titrator (QC Lot: 3136278)

EA010-P: Electrical Conductivity @ 25°C ---- 1 µS/cm 13500 13800 1.9 0% - 20%137645044 Treated Waste

Water

EP1308148-003

EA010-P: Electrical Conductivity @ 25°C ---- 1 µS/cm 13100 13300 1.4 0% - 20%AnonymousEP1308230-010





EA010-P: Electrical Conductivity @ 25°C ---- 1 µS/cm 3730 3790 1.5 0% - 20%137645044 Hydromet

Sample

EP1308148-002

ED037P: Alkalinity by PC Titrator (QC Lot: 3136276)

ED037-P: Hydroxide Alkalinity as CaCO3 DMO-210-001 1 mg/L <1 <1 0.0 No Limit137645044 Treated Waste

Water

EP1308148-003

ED037-P: Carbonate Alkalinity as CaCO3 3812-32-6 1 mg/L <1 <1 0.0 No Limit

ED037-P: Bicarbonate Alkalinity as CaCO3 71-52-3 1 mg/L 101 101 0.0 0% - 20%

ED037-P: Total Alkalinity as CaCO3 ---- 1 mg/L 101 101 0.0 0% - 20%

ED037-P: Hydroxide Alkalinity as CaCO3 DMO-210-001 1 mg/L <1 <1 0.0 No LimitAnonymousEP1308230-010






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ED037P: Alkalinity by PC Titrator (QC Lot: 3147662) - continued

ED037-P: Carbonate Alkalinity as CaCO3 3812-32-6 1 mg/L <1 <1 0.0 No LimitAnonymousEP1308379-001








ED037-P: Hydroxide Alkalinity as CaCO3 DMO-210-001 1 mg/L <1 <1 0.0 No Limit137645044 Hydromet

Sample

EP1308148-002


ED037-P: Bicarbonate Alkalinity as CaCO3 71-52-3 1 mg/L <1 <1 0.0 No Limit

ED037-P: Total Alkalinity as CaCO3 ---- 1 mg/L <1 <1 0.0 No Limit

ED038A: Acidity (QC Lot: 3139439)

ED038: Acidity as CaCO3 ---- 1 mg/L 19 19 0.0 0% - 50%137645044 Treated Waste

Water

EP1308148-003

ED038: Acidity as CaCO3 ---- 1 mg/L 71 71 0.0 0% - 20%AnonymousEP1308291-001


ED038: Acidity as CaCO3 ---- 1 mg/L 74 78 5.1 0% - 20%137645044 Treated Waste

Water

EP1308148-003

ED038: Acidity as CaCO3 ---- 1 mg/L 25 24 8.0 0% - 20%AnonymousEP1308423-001


ED038: Acidity as CaCO3 ---- 1 mg/L <1 <1 0.0 No Limit137645044 Flotation

Tailings 16.3%

EP1308148-001

ED040F: Dissolved Major Anions (QC Lot: 3136312)

ED040F: Silicon 7440-21-3 0.05 mg/L 4.36 4.38 0.4 No Limit137645044 Treated Waste

Water

EP1308148-003

ED040F: Silicon as SiO2 14464-46-1 0.1 mg/L 9.3 9.4 0.0 No Limit

ED040F: Sulfate as SO4 2- 14808-79-8 1 mg/L 13800 13800 0.1 0% - 20%

ED040F: Sulfur as S 63705-05-5 1 mg/L 4590 4580 0.1 0% - 20%

ED040F: Dissolved Major Anions (QC Lot: 3145403)

ED040F: Silicon 7440-21-3 0.05 mg/L 75.8 78.4 3.4 0% - 20%137645044 Flotation

Tailings 16.3%

EP1308148-004

ED040F: Silicon as SiO2 14464-46-1 0.1 mg/L 162 168 3.4 0% - 20%

ED040F: Sulfate as SO4 2- 14808-79-8 1 mg/L 68 65 3.7 No Limit

ED040F: Sulfur as S 63705-05-5 1 mg/L 22 22 0.0 No Limit

ED040T: Total Major Anions (QC Lot: 3161250)

ED040T: Sulfate as SO4 2- 14808-79-8 1 mg/L 2 2 0.0 No Limit137645044 Flotation

Tailings 16.3%

EP1308148-001

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ED040T: Total Major Anions (QC Lot: 3161250) - continued

ED040T: Sulfur as S 63705-05-5 1 mg/L <1 <1 0.0 No Limit137645044 Flotation

Tailings 16.3%

EP1308148-001

ED040W: Water Leachable Sulfate by ICPAES (QC Lot: 3160806)

ED040W: Silicon 7440-21-3 0.05 mg/L 23.1 23.2 0.3 0% - 20%137645044 Flotation

Tailings 16.3%

EP1308148-001

ED041G: Sulfate (Turbidimetric) as SO4 2- by DA (QC Lot: 3145407)

ED041G: Sulfate as SO4 - Turbidimetric 14808-79-8 1 mg/L 72 72 0.0 0% - 20%137645044 Flotation

Tailings 16.3%

EP1308148-004

ED041G: Sulfate (Turbidimetric) as SO4 2- by DA (QC Lot: 3161921)

ED041G: Sulfate as SO4 - Turbidimetric 14808-79-8 1 mg/L 3 3 0.0 No Limit137645044 Flotation

Tailings 16.3%

EP1308148-001

ED041G: Sulfate as SO4 - Turbidimetric 14808-79-8 1 mg/L 50 50 0.0 0% - 20%AnonymousEP1308704-001

ED045G: Chloride Discrete analyser (QC Lot: 3136315)

ED045G: Chloride 16887-00-6 1 mg/L 169 168 0.0 0% - 20%137645044 Treated Waste

Water

EP1308148-003


ED045G: Chloride 16887-00-6 1 mg/L 215 215 0.0 0% - 20%137645044 Flotation

Tailings 16.3%

EP1308148-004


ED045G: Chloride 16887-00-6 1 mg/L 6 6 0.0 No Limit137645044 Flotation

Tailings 16.3%

EP1308148-001

ED093F: Dissolved Major Cations (QC Lot: 3136313)

ED093F: Calcium 7440-70-2 1 mg/L 511 503 1.6 0% - 20%137645044 Treated Waste

Water

EP1308148-003

ED093F: Magnesium 7439-95-4 1 mg/L 3460 3460 0.0 0% - 20%

ED093F: Sodium 7440-23-5 1 mg/L 221 220 0.0 0% - 20%

ED093F: Potassium 7440-09-7 1 mg/L 211 210 0.0 0% - 20%


ED093F: Calcium 7440-70-2 1 mg/L 4 4 0.0 No Limit137645044 Flotation

Tailings 16.3%

EP1308148-004

ED093F: Magnesium 7439-95-4 1 mg/L 3 4 0.0 No Limit

ED093F: Sodium 7440-23-5 1 mg/L 256 253 1.2 0% - 20%

ED093F: Potassium 7440-09-7 1 mg/L 16 15 0.0 No Limit


ED093F: Calcium 7440-70-2 1 mg/L <1 <1 0.0 No Limit137645044 Flotation

Tailings 16.3%

EP1308148-001

ED093F: Magnesium 7439-95-4 1 mg/L <1 <1 0.0 No Limit

ED093F: Sodium 7440-23-5 1 mg/L 16 16 0.0 0% - 50%

ED093F: Potassium 7440-09-7 1 mg/L 2 1 0.0 No Limit

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EG020F: Dissolved Metals by ICP-MS (QC Lot: 3137026)

EG020A-F: Cadmium 7440-43-9 0.0001 mg/L 0.0003 0.0004 0.0 No Limit137645044 Treated Waste

Water

EP1308148-003

EG020A-F: Antimony 7440-36-0 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020A-F: Arsenic 7440-38-2 0.001 mg/L 0.164 0.163 0.9 0% - 20%

EG020A-F: Beryllium 7440-41-7 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020A-F: Barium 7440-39-3 0.001 mg/L 0.008 0.008 0.0 No Limit

EG020A-F: Chromium 7440-47-3 0.001 mg/L 0.038 0.037 0.0 0% - 20%

EG020A-F: Cobalt 7440-48-4 0.001 mg/L 0.008 0.009 0.0 No Limit

EG020A-F: Copper 7440-50-8 0.001 mg/L 0.012 0.012 0.0 0% - 50%

EG020A-F: Lead 7439-92-1 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020A-F: Lithium 7439-93-2 0.001 mg/L 0.992 0.914 8.1 0% - 20%

EG020A-F: Manganese 7439-96-5 0.001 mg/L 0.192 0.189 1.4 0% - 20%

EG020A-F: Molybdenum 7439-98-7 0.001 mg/L 0.092 0.095 3.5 0% - 20%

EG020A-F: Nickel 7440-02-0 0.001 mg/L 0.212 0.213 0.6 0% - 20%

EG020A-F: Thallium 7440-28-0 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020A-F: Tin 7440-31-5 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020A-F: Zinc 7440-66-6 0.005 mg/L 0.006 0.006 0.0 No Limit

EG020A-F: Aluminium 7429-90-5 0.01 mg/L 0.03 0.03 0.0 No Limit

EG020A-F: Selenium 7782-49-2 0.01 mg/L <0.01 <0.01 0.0 No Limit

EG020A-F: Vanadium 7440-62-2 0.01 mg/L 0.06 0.06 0.0 No Limit

EG020A-F: Boron 7440-42-8 0.05 mg/L 1.20 1.13 6.3 0% - 20%

EG020A-F: Iron 7439-89-6 0.05 mg/L <0.05 <0.05 0.0 No Limit


EG020B-F: Bismuth 7440-69-9 0.001 mg/L <0.001 <0.001 0.0 No Limit137645044 Treated Waste

Water

EP1308148-003

EG020B-F: Cerium 7440-45-1 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020B-F: Caesium 7440-46-2 0.001 mg/L 0.010 0.010 0.0 0% - 50%

EG020B-F: Rubidium 7440-17-7 0.001 mg/L 0.379 0.380 0.4 0% - 20%

EG020B-F: Silver 7440-22-4 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020B-F: Strontium 7440-24-6 0.001 mg/L 2.65 2.64 0.4 0% - 20%

EG020B-F: Thorium 7440-29-1 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020B-F: Uranium 7440-61-1 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020B-F: Tellurium 22541-49-7 0.005 mg/L <0.005 <0.005 0.0 No Limit

EG020B-F: Titanium 7440-32-6 0.01 mg/L 0.01 0.01 0.0 No Limit


EG020D-F: Dysprosium 7429-91-6 0.001 mg/L <0.001 <0.001 0.0 No Limit137645044 Treated Waste

Water

EP1308148-003

EG020D-F: Erbium 7440-52-0 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020D-F: Europium 7440-53-1 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020D-F: Gadolinium 7440-54-2 0.001 mg/L <0.001 <0.001 0.0 No Limit

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EG020F: Dissolved Metals by ICP-MS (QC Lot: 3137028) - continued

EG020D-F: Gallium 7440-55-3 0.001 mg/L <0.001 <0.001 0.0 No Limit137645044 Treated Waste

Water

EP1308148-003

EG020D-F: Holmium 7440-60-0 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020D-F: Indium 7440-74-6 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020D-F: Lanthanum 7439-91-0 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020D-F: Lutetium 7439-94-3 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020D-F: Neodymium 7440-00-8 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020D-F: Praseodymium 7440-10-0 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020D-F: Samarium 7440-19-9 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020D-F: Terbium 7440-27-9 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020D-F: Thulium 7440-30-4 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020D-F: Ytterbium 7440-64-4 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020D-F: Yttrium 7440-65-5 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020D-F: Zirconium 7440-67-7 0.005 mg/L <0.005 <0.005 0.0 No Limit

EG020D-F: Hafnium 7440-58-6 0.01 mg/L <0.01 <0.01 0.0 No Limit


EG020A-F: Cadmium 7440-43-9 0.0001 mg/L 0.0003 0.0004 0.0 No Limit137645044 Treated Waste

Water

EP1308148-003

EG020A-F: Antimony 7440-36-0 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020A-F: Arsenic 7440-38-2 0.001 mg/L 0.164 0.157 4.3 0% - 20%

EG020A-F: Beryllium 7440-41-7 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020A-F: Barium 7440-39-3 0.001 mg/L 0.008 0.007 15.1 No Limit

EG020A-F: Chromium 7440-47-3 0.001 mg/L 0.038 0.035 6.4 0% - 20%

EG020A-F: Cobalt 7440-48-4 0.001 mg/L 0.008 0.009 0.0 No Limit

EG020A-F: Copper 7440-50-8 0.001 mg/L 0.012 0.011 0.0 0% - 50%

EG020A-F: Lead 7439-92-1 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020A-F: Lithium 7439-93-2 0.001 mg/L 1.12 1.07 4.6 0% - 20%

EG020A-F: Manganese 7439-96-5 0.001 mg/L 0.192 0.171 11.2 0% - 20%

EG020A-F: Molybdenum 7439-98-7 0.001 mg/L 0.092 0.105 13.8 0% - 20%

EG020A-F: Nickel 7440-02-0 0.001 mg/L 0.212 0.199 6.2 0% - 20%

EG020A-F: Thallium 7440-28-0 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020A-F: Tin 7440-31-5 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020A-F: Zinc 7440-66-6 0.005 mg/L 0.006 0.006 0.0 No Limit

EG020A-F: Aluminium 7429-90-5 0.01 mg/L 0.04 0.04 0.0 No Limit

EG020A-F: Selenium 7782-49-2 0.01 mg/L <0.01 <0.01 0.0 No Limit

EG020A-F: Vanadium 7440-62-2 0.01 mg/L 0.06 0.06 0.0 No Limit

EG020A-F: Boron 7440-42-8 0.05 mg/L 1.44 1.42 1.4 0% - 20%

EG020A-F: Iron 7439-89-6 0.05 mg/L <0.05 <0.05 0.0 No Limit


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EG020F: Dissolved Metals by ICP-MS (QC Lot: 3144632) - continued

EG020B-F: Bismuth 7440-69-9 0.001 mg/L <0.001 <0.001 0.0 No Limit137645044 Treated Waste

Water

EP1308148-003

EG020B-F: Cerium 7440-45-1 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020B-F: Caesium 7440-46-2 0.001 mg/L 0.010 0.009 11.7 No Limit

EG020B-F: Rubidium 7440-17-7 0.001 mg/L 0.411 0.406 1.2 0% - 20%

EG020B-F: Silver 7440-22-4 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020B-F: Strontium 7440-24-6 0.001 mg/L 2.65 2.46 7.5 0% - 20%

EG020B-F: Thorium 7440-29-1 0.001 mg/L 0.002 <0.001 0.0 No Limit

EG020B-F: Uranium 7440-61-1 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020B-F: Tellurium 22541-49-7 0.005 mg/L <0.005 <0.005 0.0 No Limit

EG020B-F: Titanium 7440-32-6 0.01 mg/L 0.01 0.01 0.0 No Limit


EG020D-F: Dysprosium 7429-91-6 0.001 mg/L <0.001 <0.001 0.0 No Limit137645044 Treated Waste

Water

EP1308148-003

EG020D-F: Erbium 7440-52-0 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020D-F: Europium 7440-53-1 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020D-F: Gadolinium 7440-54-2 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020D-F: Gallium 7440-55-3 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020D-F: Holmium 7440-60-0 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020D-F: Indium 7440-74-6 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020D-F: Lanthanum 7439-91-0 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020D-F: Lutetium 7439-94-3 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020D-F: Neodymium 7440-00-8 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020D-F: Praseodymium 7440-10-0 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020D-F: Samarium 7440-19-9 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020D-F: Terbium 7440-27-9 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020D-F: Thulium 7440-30-4 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020D-F: Ytterbium 7440-64-4 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020D-F: Yttrium 7440-65-5 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020D-F: Zirconium 7440-67-7 0.005 mg/L <0.005 <0.005 0.0 No Limit

EG020D-F: Hafnium 7440-58-6 0.01 mg/L <0.01 <0.01 0.0 No Limit

EG020W: Water Leachable Metals by ICP-MS (QC Lot: 3160803)

EG020A-W: Antimony 7440-36-0 0.001 mg/L 0.001 <0.001 0.0 No Limit137645044 Flotation

Tailings 16.3%

EP1308148-001

EG020A-W: Arsenic 7440-38-2 0.001 mg/L 0.004 0.004 0.0 No Limit

EG020A-W: Beryllium 7440-41-7 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020A-W: Barium 7440-39-3 0.001 mg/L 0.622 0.622 0.0 0% - 20%

EG020A-W: Cobalt 7440-48-4 0.001 mg/L 0.003 0.003 0.0 No Limit

EG020A-W: Copper 7440-50-8 0.001 mg/L 0.242 0.243 0.0 0% - 20%

EG020A-W: Lead 7439-92-1 0.001 mg/L 0.028 0.029 3.8 0% - 20%

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EG020W: Water Leachable Metals by ICP-MS (QC Lot: 3160803) - continued

EG020A-W: Lithium 7439-93-2 0.001 mg/L 0.005 0.005 0.0 No Limit137645044 Flotation

Tailings 16.3%

EP1308148-001

EG020A-W: Manganese 7439-96-5 0.001 mg/L 0.098 0.100 1.7 0% - 20%

EG020A-W: Molybdenum 7439-98-7 0.001 mg/L 0.004 0.004 0.0 No Limit

EG020A-W: Nickel 7440-02-0 0.001 mg/L 0.050 0.049 0.0 0% - 20%

EG020A-W: Thallium 7440-28-0 0.001 mg/L <0.001 <0.001 0.0 No Limit

EG020A-W: Tin 7440-31-5 0.001 mg/L 0.001 0.001 0.0 No Limit

EG020A-W: Zinc 7440-66-6 0.005 mg/L 0.115 0.116 0.9 0% - 20%

EG020A-W: Aluminium 7429-90-5 0.01 mg/L 5.45 5.36 1.7 0% - 20%

EG020A-W: Selenium 7782-49-2 0.01 mg/L <0.01 <0.01 0.0 No Limit

EG020A-W: Boron 7440-42-8 0.05 mg/L 0.11 0.12 0.0 No Limit

EG020A-W: Iron 7439-89-6 0.05 mg/L 4.83 4.82 0.0 0% - 20%


EG020B-W: Bismuth 7440-69-9 0.001 mg/L <0.001 0.001 0.0 No Limit137645044 Flotation

Tailings 16.3%

EP1308148-001

EG020B-W: Cerium 7440-45-1 0.001 mg/L 0.026 0.026 0.0 0% - 20%

EG020B-W: Caesium 7440-46-2 0.001 mg/L 0.001 0.001 0.0 No Limit

EG020B-W: Rubidium 7440-17-7 0.001 mg/L 0.009 0.009 0.0 No Limit

EG020B-W: Strontium 7440-24-6 0.001 mg/L 0.044 0.043 0.0 0% - 20%

EG020B-W: Thorium 7440-29-1 0.001 mg/L 0.007 0.007 0.0 No Limit

EG020B-W: Uranium 7440-61-1 0.001 mg/L 0.005 0.005 0.0 No Limit

EG020B-W: Titanium 7440-32-6 0.01 mg/L <0.01 <0.01 0.0 No Limit


EG020D-W: Indium 7440-74-6 0.001 mg/L <0.001 <0.001 0.0 No Limit137645044 Flotation

Tailings 16.3%

EP1308148-001

EG035W: Water Leachable Mercury by FIMS (QC Lot: 3166406)

EG035W: Mercury 7439-97-6 0.0001 mg/L <0.0001 <0.0001 0.0 No Limit137645044 Flotation

Tailings 16.3%

EP1308148-001

EK057G: Nitrite as N by Discrete Analyser (QC Lot: 3136314)

EK057G: Nitrite as N ---- 0.01 mg/L <0.01 0.01 0.0 No Limit137645044 Treated Waste

Water

EP1308148-003


EK057G: Nitrite as N ---- 0.01 mg/L <0.01 <0.01 0.0 No Limit137645044 Flotation

Tailings 16.3%

EP1308148-004


EK057G: Nitrite as N ---- 0.01 mg/L <0.01 <0.01 0.0 No Limit137645044 Flotation

Tailings 16.3%

EP1308148-001

EK059G: Nitrite plus Nitrate as N (NOx) by Discrete Analyser (QC Lot: 3138189)

EK059G: Nitrite + Nitrate as N ---- 0.01 mg/L 0.22 0.22 0.0 0% - 20%137645044 Treated Waste

Water

EP1308148-003

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EK059G: Nitrite + Nitrate as N ---- 0.01 mg/L 0.01 <0.01 0.0 No LimitAnonymousEP1308416-001

EK059G: Nitrite + Nitrate as N ---- 0.01 mg/L 0.01 0.01 0.0 No LimitAnonymousEP1308419-004


EK059G: Nitrite + Nitrate as N ---- 0.01 mg/L 0.01 0.01 0.0 No Limit137645044 Flotation

Tailings 16.3%

EP1308148-001

EK059G: Nitrite + Nitrate as N ---- 0.01 mg/L 18.2 17.7 2.8 0% - 20%AnonymousEP1308661-012

EK067G: Total Phosphorus as P by Discrete Analyser (QC Lot: 3140673)

EK067G: Total Phosphorus as P ---- 0.01 mg/L 5.94 5.75 3.2 0% - 20%137645044 Treated Waste

Water

EP1308148-003

EK067G: Total Phosphorus as P ---- 0.01 mg/L 6.72 6.42 4.6 0% - 20%AnonymousEP1308287-006


EK067G: Total Phosphorus as P ---- 0.01 mg/L 0.10 0.06 40.7 No LimitAnonymousEP1308354-001

EK067G: Total Phosphorus as P ---- 0.01 mg/L <0.01 <0.01 0.0 No LimitAnonymousEP1308386-004


EK067G: Total Phosphorus as P ---- 0.01 mg/L 0.55 0.59 7.0 0% - 20%137645044 Flotation

Tailings 16.3%

EP1308148-001

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GOLDER ASSOCIATES


Method Blank (MB) and Laboratory Control Spike (LCS) Report

The quality control term Method / Laboratory Blank refers to an analyte free matrix to which all reagents are added in the same volumes or proportions as used in standard sample preparation. The purpose of this QC

parameter is to monitor potential laboratory contamination. The quality control term Laboratory Control Sample (LCS) refers to a certified reference material, or a known interference free matrix spiked with target

analytes. The purpose of this QC parameter is to monitor method precision and accuracy independent of sample matrix. Dynamic Recovery Limits are based on statistical evaluation of processed LCS.

Sub-Matrix: SOIL Method Blank (MB)

Report

Laboratory Control Spike (LCS) Report

Spike Spike Recovery (%) Recovery Limits (%)

Result Concentration HighLowLCSMethod: Compound CAS Number LOR Unit

EA011: Net Acid Generation (QCLot: 3137387)

EA011: NAG (pH 7.0) ---- 0.1 kg H2SO4/t ---- 10324.8281 kg H2SO4/t 11490

EA011: Net Acid Generation (QCLot: 3145058)

EA011: NAG (pH 7.0) ---- 0.1 kg H2SO4/t ---- 10224.8281 kg H2SO4/t 11490

EA013: Acid Neutralising Capacity (QCLot: 3137386)

EA013: ANC as H2SO4 ---- 0.5 kg H2SO4 equ ---- 1069.8 kg H2SO4 equ 11880.4

0.5 kg H2SO4 equiv./t <0.5 -------- --------

EA013: ANC as CaCO3 ---- 0.1 % CaCO3 <0.1 -------- --------

EA013: Acid Neutralising Capacity (QCLot: 3145057)

EA013: ANC as H2SO4 ---- 0.5 kg H2SO4 equ ---- 99.29.8 kg H2SO4 equ 11880.4

0.5 kg H2SO4 equiv./t <0.5 -------- --------

EA013: ANC as CaCO3 ---- 0.1 % CaCO3 <0.1 -------- --------

EA031: pH (saturated paste) (QCLot: 3153648)

EA031: pH (Saturated Paste) ---- 0.1 pH Unit ---- 99.87.00 pH Unit 13070

EA032: Electrical Conductivity (saturated paste) (QCLot: 3153649)

EA032: Electrical Conductivity (Saturated Paste) ---- 1 µS/cm <1 1001412 µS/cm 10496

ED040T : Total Sulfate by ICPAES (QCLot: 3168841)

ED040T: Sulfate as SO4 2- 14808-79-8 100 mg/kg <100 -------- --------

ED042T: Total Sulfur by LECO (QCLot: 3155740)

ED042T: Sulfur - Total as S (LECO) ---- 0.01 % <0.01 1030.15 % 13070

ED093T: Total Major Cations (QCLot: 3303399)

ED093T: Sodium 7440-23-5 10 mg/kg <10 -------- --------

ED093T: Potassium 7440-09-7 10 mg/kg <10 -------- --------

ED093T: Calcium 7440-70-2 10 mg/kg <10 -------- --------

ED093T: Magnesium 7439-95-4 10 mg/kg <10 -------- --------

EG005T: Total Metals by ICP-AES (QCLot: 3155706)

EG005T: Aluminium 7429-90-5 50 mg/kg <50 -------- --------

EG005T: Boron 7440-42-8 50 mg/kg <50 -------- --------

EG005T: Iron 7439-89-6 50 mg/kg <50 -------- --------

EG020T: Total Metals by ICP-MS (QCLot: 3140536)

EG020X-T: Arsenic 7440-38-2 0.1 mg/kg <0.1 93.321.62091 mg/kg 13070

EG020X-T: Barium 7440-39-3 0.1 mg/kg <0.1 94.6154.8497 mg/kg 11971

EG020X-T: Beryllium 7440-41-7 0.1 mg/kg <0.1 -------- --------

EG020X-T: Cobalt 7440-48-4 0.1 mg/kg <0.1 -------- --------

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Report




EG020T: Total Metals by ICP-MS (QCLot: 3140536) - continued

EG020X-T: Chromium 7440-47-3 0.1 mg/kg <0.1 74.233.90415 mg/kg 13070

EG020X-T: Copper 7440-50-8 0.1 mg/kg <0.1 87.233.78205 mg/kg 13070

EG020X-T: Manganese 7439-96-5 0.1 mg/kg <0.1 -------- --------

EG020X-T: Molybdenum 7439-98-7 0.1 mg/kg <0.1 -------- --------

EG020X-T: Nickel 7440-02-0 0.1 mg/kg <0.1 94.551.10088 mg/kg 11674

EG020X-T: Lead 7439-92-1 0.1 mg/kg <0.1 95.040.33169 mg/kg 13070

EG020X-T: Antimony 7440-36-0 0.1 mg/kg <0.1 -------- --------

EG020X-T: Uranium 7440-61-1 0.1 mg/kg <0.1 -------- --------

EG020X-T: Zinc 7440-66-6 0.5 mg/kg <0.5 10361.70999 mg/kg 13070

EG020X-T: Lithium 7439-93-2 0.1 mg/kg <0.1 -------- --------

EG020X-T: Vanadium 7440-62-2 1 mg/kg <1 -------- --------

EG020X-T: Tin 7440-31-5 0.1 mg/kg <0.1 -------- --------


EG020Y-T: Selenium 7782-49-2 1 mg/kg <1 -------- --------

EG020Y-T: Thallium 7440-28-0 0.1 mg/kg <0.1 -------- --------

EG020Y-T: Cadmium 7440-43-9 0.1 mg/kg <0.1 1054.683838 mg/kg 13070

EG020Y-T: Bismuth 7440-69-9 0.1 mg/kg <0.1 -------- --------

EG020Y-T: Thorium 7440-29-1 0.1 mg/kg <0.1 -------- --------


EG020Z-T: Silver 7440-22-4 0.1 mg/kg <0.1 -------- --------


EG020X-T: Arsenic 7440-38-2 0.1 mg/kg <0.1 10621.62091 mg/kg 13070

EG020X-T: Barium 7440-39-3 0.1 mg/kg <0.1 85.7154.8497 mg/kg 11971

EG020X-T: Beryllium 7440-41-7 0.1 mg/kg <0.1 -------- --------

EG020X-T: Cobalt 7440-48-4 0.1 mg/kg <0.1 -------- --------

EG020X-T: Chromium 7440-47-3 0.1 mg/kg <0.1 71.833.90415 mg/kg 13070

EG020X-T: Copper 7440-50-8 0.1 mg/kg <0.1 98.133.78205 mg/kg 13070

EG020X-T: Manganese 7439-96-5 0.1 mg/kg <0.1 -------- --------

EG020X-T: Molybdenum 7439-98-7 0.1 mg/kg <0.1 -------- --------

EG020X-T: Nickel 7440-02-0 0.1 mg/kg <0.1 10751.10088 mg/kg 11674

EG020X-T: Lead 7439-92-1 0.1 mg/kg <0.1 10240.33169 mg/kg 13070

EG020X-T: Antimony 7440-36-0 0.1 mg/kg <0.1 -------- --------

EG020X-T: Uranium 7440-61-1 0.1 mg/kg <0.1 -------- --------

EG020X-T: Zinc 7440-66-6 0.5 mg/kg <0.5 11161.70999 mg/kg 13070

EG020X-T: Lithium 7439-93-2 0.1 mg/kg <0.1 -------- --------

EG020X-T: Vanadium 7440-62-2 1 mg/kg <1 -------- --------

EG020X-T: Tin 7440-31-5 0.1 mg/kg <0.1 -------- --------


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Report





EG020Y-T: Selenium 7782-49-2 1 mg/kg <1 -------- --------

EG020Y-T: Thallium 7440-28-0 0.1 mg/kg <0.1 -------- --------

EG020Y-T: Cadmium 7440-43-9 0.1 mg/kg <0.1 1054.683838 mg/kg 13070

EG020Y-T: Bismuth 7440-69-9 0.1 mg/kg <0.1 -------- --------

EG020Y-T: Thorium 7440-29-1 0.1 mg/kg <0.1 -------- --------


EG020Z-T: Silver 7440-22-4 0.1 mg/kg <0.1 -------- --------

EG035T: Total Recoverable Mercury by FIMS (QCLot: 3166589)

EG035T: Mercury 7439-97-6 0.1 mg/kg <0.1 1142.154 mg/kg 12175.4

Sub-Matrix: WATER Method Blank (MB)

Report




EA005P: pH by PC Titrator (QCLot: 3136280)

EA005-P: pH Value ---- 0.01 pH Unit ---- 1007.00 pH Unit 101.598.5





EA010P: Conductivity by PC Titrator (QCLot: 3136278)

EA010-P: Electrical Conductivity @ 25°C ---- 1 µS/cm <1 97.11412 µS/cm 10595





ED037P: Alkalinity by PC Titrator (QCLot: 3136276)

ED037-P: Hydroxide Alkalinity as CaCO3 DMO-210-00

1

1 mg/L <1 -------- --------

ED037-P: Carbonate Alkalinity as CaCO3 3812-32-6 1 mg/L <1 -------- --------

ED037-P: Bicarbonate Alkalinity as CaCO3 71-52-3 1 mg/L <1 -------- --------

ED037-P: Total Alkalinity as CaCO3 ---- 1 mg/L <1 81.3200 mg/L 12187



1

1 mg/L <1 -------- --------





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ED037P: Alkalinity by PC Titrator (QCLot: 3166305) - continued


1

1 mg/L <1 -------- --------




ED038A: Acidity (QCLot: 3139439)

ED038: Acidity as CaCO3 ---- 1 mg/L ---- 99.320 mg/L 11985


ED038: Acidity as CaCO3 ---- 1 mg/L ---- 10820 mg/L 11985


ED038: Acidity as CaCO3 ---- 1 mg/L ---- 10420 mg/L 11985

ED040F: Dissolved Major Anions (QCLot: 3136312)

ED040F: Sulfate as SO4 2- 14808-79-8 1 mg/L <1 10045 mg/L 10890

ED040F: Sulfur as S 63705-05-5 1 mg/L <1 -------- --------

ED040F: Silicon as SiO2 14464-46-1 0.1 mg/L <0.1 -------- --------

ED040F: Silicon 7440-21-3 0.05 mg/L <0.05 -------- --------

ED040F: Dissolved Major Anions (QCLot: 3145403)

ED040F: Sulfate as SO4 2- 14808-79-8 1 mg/L <1 99.645 mg/L 10890

ED040F: Sulfur as S 63705-05-5 1 mg/L <1 -------- --------

ED040F: Silicon as SiO2 14464-46-1 0.1 mg/L <0.1 -------- --------

ED040F: Silicon 7440-21-3 0.05 mg/L <0.05 -------- --------

ED040T: Total Major Anions (QCLot: 3161250)

ED040T: Sulfate as SO4 2- 14808-79-8 1 mg/L <1 -------- --------

ED040T: Sulfur as S 63705-05-5 1 mg/L <1 -------- --------

ED040W: Water Leachable Sulfate by ICPAES (QCLot: 3160806)

ED040W: Silicon 7440-21-3 0.05 mg/L <0.05 -------- --------

ED041G: Sulfate (Turbidimetric) as SO4 2- by DA (QCLot: 3136316)

ED041G: Sulfate as SO4 - Turbidimetric 14808-79-8 1 mg/L <1 96.425 mg/L 12188





ED045G: Chloride Discrete analyser (QCLot: 3136315)

ED045G: Chloride 16887-00-6 1 mg/L <1 97.81000 mg/L 12084


ED045G: Chloride 16887-00-6 1 mg/L <1 1061000 mg/L 12084


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ED045G: Chloride Discrete analyser (QCLot: 3161920) - continued

ED045G: Chloride 16887-00-6 1 mg/L <1 96.01000 mg/L 12084

ED093F: Dissolved Major Cations (QCLot: 3136313)

ED093F: Calcium 7440-70-2 1 mg/L <1 10350 mg/L 10991

ED093F: Magnesium 7439-95-4 1 mg/L <1 99.950 mg/L 10890

ED093F: Sodium 7440-23-5 1 mg/L <1 99.150 mg/L 11187

ED093F: Potassium 7440-09-7 1 mg/L <1 99.850 mg/L 11090


ED093F: Calcium 7440-70-2 1 mg/L <1 10250 mg/L 10991

ED093F: Magnesium 7439-95-4 1 mg/L <1 10250 mg/L 10890

ED093F: Sodium 7440-23-5 1 mg/L <1 10250 mg/L 11187

ED093F: Potassium 7440-09-7 1 mg/L <1 10450 mg/L 11090


ED093F: Calcium 7440-70-2 1 mg/L <1 99.550 mg/L 10991

ED093F: Magnesium 7439-95-4 1 mg/L <1 10150 mg/L 10890

ED093F: Sodium 7440-23-5 1 mg/L <1 99.150 mg/L 11187

ED093F: Potassium 7440-09-7 1 mg/L <1 10050 mg/L 11090

EG020F: Dissolved Metals by ICP-MS (QCLot: 3137026)

EG020A-F: Aluminium 7429-90-5 0.01 mg/L <0.01 90.40.50 mg/L 11377

EG020A-F: Antimony 7440-36-0 0.001 mg/L <0.001 93.00.100 mg/L 14381

EG020A-F: Arsenic 7440-38-2 0.001 mg/L <0.001 1040.100 mg/L 10989

EG020A-F: Beryllium 7440-41-7 0.001 mg/L <0.001 99.10.100 mg/L 12177

EG020A-F: Barium 7440-39-3 0.001 mg/L <0.001 1000.100 mg/L 10888

EG020A-F: Cadmium 7440-43-9 0.0001 mg/L <0.0001 1030.1000 mg/L 10989

EG020A-F: Chromium 7440-47-3 0.001 mg/L <0.001 94.50.100 mg/L 10688

EG020A-F: Cobalt 7440-48-4 0.001 mg/L <0.001 1020.100 mg/L 10888

EG020A-F: Copper 7440-50-8 0.001 mg/L <0.001 96.20.100 mg/L 11185

EG020A-F: Lead 7439-92-1 0.001 mg/L <0.001 98.90.100 mg/L 10587

EG020A-F: Lithium 7439-93-2 0.001 mg/L <0.001 96.80.100 mg/L 12969

EG020A-F: Manganese 7439-96-5 0.001 mg/L <0.001 97.00.100 mg/L 10787

EG020A-F: Molybdenum 7439-98-7 0.001 mg/L <0.001 95.50.100 mg/L 10789

EG020A-F: Nickel 7440-02-0 0.001 mg/L <0.001 1000.100 mg/L 10987

EG020A-F: Selenium 7782-49-2 0.01 mg/L <0.01 1130.10 mg/L 11793

EG020A-F: Thallium 7440-28-0 0.001 mg/L <0.001 1020.100 mg/L 10789

EG020A-F: Tin 7440-31-5 0.001 mg/L <0.001 1000.100 mg/L 12379

EG020A-F: Vanadium 7440-62-2 0.01 mg/L <0.01 89.70.10 mg/L 10686

EG020A-F: Zinc 7440-66-6 0.005 mg/L <0.005 1030.100 mg/L 11589

EG020A-F: Boron 7440-42-8 0.05 mg/L <0.05 1010.10 mg/L 12175

EG020A-F: Iron 7439-89-6 0.05 mg/L <0.05 94.60.50 mg/L 10983

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EG020B-F: Bismuth 7440-69-9 0.001 mg/L <0.001 84.20.1 mg/L 12755

EG020B-F: Cerium 7440-45-1 0.001 mg/L <0.001 -------- --------

EG020B-F: Caesium 7440-46-2 0.001 mg/L <0.001 -------- --------

EG020B-F: Rubidium 7440-17-7 0.001 mg/L <0.001 -------- --------

EG020B-F: Silver 7440-22-4 0.001 mg/L <0.001 98.80.01 mg/L 10565

EG020B-F: Strontium 7440-24-6 0.001 mg/L <0.001 1010.1 mg/L 10884

EG020B-F: Tellurium 22541-49-7 0.005 mg/L <0.005 1050.1 mg/L 10882

EG020B-F: Thorium 7440-29-1 0.001 mg/L <0.001 -------- --------

EG020B-F: Titanium 7440-32-6 0.01 mg/L <0.01 85.40.1 mg/L 10684

EG020B-F: Uranium 7440-61-1 0.001 mg/L <0.001 -------- --------


EG020D-F: Dysprosium 7429-91-6 0.001 mg/L <0.001 -------- --------

EG020D-F: Erbium 7440-52-0 0.001 mg/L <0.001 -------- --------

EG020D-F: Europium 7440-53-1 0.001 mg/L <0.001 -------- --------

EG020D-F: Gadolinium 7440-54-2 0.001 mg/L <0.001 -------- --------

EG020D-F: Gallium 7440-55-3 0.001 mg/L <0.001 -------- --------

EG020D-F: Hafnium 7440-58-6 0.01 mg/L <0.01 -------- --------

EG020D-F: Holmium 7440-60-0 0.001 mg/L <0.001 -------- --------

EG020D-F: Indium 7440-74-6 0.001 mg/L <0.001 -------- --------

EG020D-F: Lanthanum 7439-91-0 0.001 mg/L <0.001 -------- --------

EG020D-F: Lutetium 7439-94-3 0.001 mg/L <0.001 -------- --------

EG020D-F: Neodymium 7440-00-8 0.001 mg/L <0.001 -------- --------

EG020D-F: Praseodymium 7440-10-0 0.001 mg/L <0.001 -------- --------

EG020D-F: Samarium 7440-19-9 0.001 mg/L <0.001 -------- --------

EG020D-F: Terbium 7440-27-9 0.001 mg/L <0.001 -------- --------

EG020D-F: Thulium 7440-30-4 0.001 mg/L <0.001 -------- --------

EG020D-F: Ytterbium 7440-64-4 0.001 mg/L <0.001 -------- --------

EG020D-F: Yttrium 7440-65-5 0.001 mg/L <0.001 -------- --------

EG020D-F: Zirconium 7440-67-7 0.005 mg/L <0.005 -------- --------


EG020A-F: Aluminium 7429-90-5 0.01 mg/L <0.01 99.10.50 mg/L 11377

EG020A-F: Antimony 7440-36-0 0.001 mg/L <0.001 84.00.100 mg/L 14381

EG020A-F: Arsenic 7440-38-2 0.001 mg/L <0.001 96.00.100 mg/L 10989

EG020A-F: Beryllium 7440-41-7 0.001 mg/L <0.001 88.90.100 mg/L 12177

EG020A-F: Barium 7440-39-3 0.001 mg/L <0.001 91.60.100 mg/L 10888

EG020A-F: Cadmium 7440-43-9 0.0001 mg/L <0.0001 94.20.1000 mg/L 10989

EG020A-F: Chromium 7440-47-3 0.001 mg/L <0.001 91.30.100 mg/L 10688

EG020A-F: Cobalt 7440-48-4 0.001 mg/L <0.001 92.90.100 mg/L 10888

EG020A-F: Copper 7440-50-8 0.001 mg/L <0.001 93.40.100 mg/L 11185

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EG020F: Dissolved Metals by ICP-MS (QCLot: 3144631) - continued

EG020A-F: Lead 7439-92-1 0.001 mg/L <0.001 93.50.100 mg/L 10587

EG020A-F: Lithium 7439-93-2 0.001 mg/L <0.001 90.40.100 mg/L 12969

EG020A-F: Manganese 7439-96-5 0.001 mg/L <0.001 89.30.100 mg/L 10787

EG020A-F: Molybdenum 7439-98-7 0.001 mg/L <0.001 89.60.100 mg/L 10789

EG020A-F: Nickel 7440-02-0 0.001 mg/L <0.001 96.00.100 mg/L 10987

EG020A-F: Selenium 7782-49-2 0.01 mg/L <0.01 1020.10 mg/L 11793

EG020A-F: Thallium 7440-28-0 0.001 mg/L <0.001 92.40.100 mg/L 10789

EG020A-F: Tin 7440-31-5 0.001 mg/L <0.001 91.40.100 mg/L 12379

EG020A-F: Vanadium 7440-62-2 0.01 mg/L <0.01 91.30.10 mg/L 10686

EG020A-F: Zinc 7440-66-6 0.005 mg/L <0.005 97.70.100 mg/L 11589

EG020A-F: Boron 7440-42-8 0.05 mg/L <0.05 97.50.10 mg/L 12175

EG020A-F: Iron 7439-89-6 0.05 mg/L <0.05 88.20.50 mg/L 10983


EG020B-F: Bismuth 7440-69-9 0.001 mg/L <0.001 73.20.1 mg/L 12755

EG020B-F: Cerium 7440-45-1 0.001 mg/L <0.001 -------- --------

EG020B-F: Caesium 7440-46-2 0.001 mg/L <0.001 -------- --------

EG020B-F: Rubidium 7440-17-7 0.001 mg/L <0.001 -------- --------

EG020B-F: Silver 7440-22-4 0.001 mg/L <0.001 79.00.01 mg/L 10565

EG020B-F: Strontium 7440-24-6 0.001 mg/L <0.001 91.40.1 mg/L 10884

EG020B-F: Tellurium 22541-49-7 0.005 mg/L <0.005 96.80.1 mg/L 10882

EG020B-F: Thorium 7440-29-1 0.001 mg/L <0.001 -------- --------

EG020B-F: Titanium 7440-32-6 0.01 mg/L <0.01 87.90.1 mg/L 10684

EG020B-F: Uranium 7440-61-1 0.001 mg/L <0.001 -------- --------


EG020D-F: Dysprosium 7429-91-6 0.001 mg/L <0.001 -------- --------

EG020D-F: Erbium 7440-52-0 0.001 mg/L <0.001 -------- --------

EG020D-F: Europium 7440-53-1 0.001 mg/L <0.001 -------- --------

EG020D-F: Gadolinium 7440-54-2 0.001 mg/L <0.001 -------- --------

EG020D-F: Gallium 7440-55-3 0.001 mg/L <0.001 -------- --------

EG020D-F: Hafnium 7440-58-6 0.01 mg/L <0.01 -------- --------

EG020D-F: Holmium 7440-60-0 0.001 mg/L <0.001 -------- --------

EG020D-F: Indium 7440-74-6 0.001 mg/L <0.001 -------- --------

EG020D-F: Lanthanum 7439-91-0 0.001 mg/L <0.001 -------- --------

EG020D-F: Lutetium 7439-94-3 0.001 mg/L <0.001 -------- --------

EG020D-F: Neodymium 7440-00-8 0.001 mg/L <0.001 -------- --------

EG020D-F: Praseodymium 7440-10-0 0.001 mg/L <0.001 -------- --------

EG020D-F: Samarium 7440-19-9 0.001 mg/L <0.001 -------- --------

EG020D-F: Terbium 7440-27-9 0.001 mg/L <0.001 -------- --------

EG020D-F: Thulium 7440-30-4 0.001 mg/L <0.001 -------- --------

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EG020F: Dissolved Metals by ICP-MS (QCLot: 3144633) - continued

EG020D-F: Ytterbium 7440-64-4 0.001 mg/L <0.001 -------- --------

EG020D-F: Yttrium 7440-65-5 0.001 mg/L <0.001 -------- --------

EG020D-F: Zirconium 7440-67-7 0.005 mg/L <0.005 -------- --------

EG020W: Water Leachable Metals by ICP-MS (QCLot: 3160803)

EG020A-W: Aluminium 7429-90-5 0.01 mg/L <0.01 97.70.5 mg/L 11585

EG020A-W: Antimony 7440-36-0 0.001 mg/L <0.001 1080.1 mg/L 14476

EG020A-W: Arsenic 7440-38-2 0.001 mg/L <0.001 96.50.1 mg/L 10979

EG020A-W: Beryllium 7440-41-7 0.001 mg/L <0.001 95.80.1 mg/L 11280

EG020A-W: Barium 7440-39-3 0.001 mg/L <0.001 97.80.1 mg/L 11680

EG020A-W: Cobalt 7440-48-4 0.001 mg/L <0.001 1000.1 mg/L 11183

EG020A-W: Copper 7440-50-8 0.001 mg/L <0.001 98.10.1 mg/L 11282

EG020A-W: Lead 7439-92-1 0.001 mg/L <0.001 1030.1 mg/L 11082

EG020A-W: Lithium 7439-93-2 0.001 mg/L <0.001 1190.1 mg/L 12769

EG020A-W: Manganese 7439-96-5 0.001 mg/L <0.001 96.00.1 mg/L 11183

EG020A-W: Molybdenum 7439-98-7 0.001 mg/L <0.001 1060.1 mg/L 11981

EG020A-W: Nickel 7440-02-0 0.001 mg/L <0.001 99.20.1 mg/L 11183

EG020A-W: Selenium 7782-49-2 0.01 mg/L <0.01 1000.1 mg/L 10979

EG020A-W: Thallium 7440-28-0 0.001 mg/L <0.001 1040.1 mg/L 11383

EG020A-W: Tin 7440-31-5 0.001 mg/L <0.001 98.60.1 mg/L 13068

EG020A-W: Zinc 7440-66-6 0.005 mg/L <0.005 88.40.1 mg/L 10777

EG020A-W: Boron 7440-42-8 0.05 mg/L <0.05 1030.1 mg/L 12272

EG020A-W: Iron 7439-89-6 0.05 mg/L <0.05 96.20.5 mg/L 11381


EG020B-W: Bismuth 7440-69-9 0.001 mg/L <0.001 1030.1 mg/L 14254

EG020B-W: Cerium 7440-45-1 0.001 mg/L <0.001 -------- --------

EG020B-W: Caesium 7440-46-2 0.001 mg/L <0.001 -------- --------

EG020B-W: Rubidium 7440-17-7 0.001 mg/L <0.001 -------- --------

EG020B-W: Strontium 7440-24-6 0.001 mg/L <0.001 98.10.1 mg/L 11577

EG020B-W: Thorium 7440-29-1 0.001 mg/L <0.001 -------- --------

EG020B-W: Titanium 7440-32-6 0.01 mg/L <0.01 92.80.1 mg/L 11082

EG020B-W: Uranium 7440-61-1 0.001 mg/L <0.001 -------- --------


EG020D-W: Indium 7440-74-6 0.001 mg/L <0.001 -------- --------

EG035W: Water Leachable Mercury by FIMS (QCLot: 3166406)

EG035W: Mercury 7439-97-6 0.0001 mg/L <0.0001 1040.0100 mg/L 11593

EK057G: Nitrite as N by Discrete Analyser (QCLot: 3136314)

EK057G: Nitrite as N ---- 0.01 mg/L <0.01 94.20.5 mg/L 11286


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EK057G: Nitrite as N by Discrete Analyser (QCLot: 3145405) - continued

EK057G: Nitrite as N ---- 0.01 mg/L <0.01 1030.5 mg/L 11286


EK057G: Nitrite as N ---- 0.01 mg/L <0.01 1020.5 mg/L 11286

EK059G: Nitrite plus Nitrate as N (NOx) by Discrete Analyser (QCLot: 3138189)

EK059G: Nitrite + Nitrate as N ---- 0.01 mg/L <0.01 1020.5 mg/L 11292





EK067G: Total Phosphorus as P by Discrete Analyser (QCLot: 3140673)

EK067G: Total Phosphorus as P ---- 0.01 mg/L <0.01 90.84.42 mg/L 13070





Matrix Spike (MS) ReportThe quality control term Matrix Spike (MS) refers to an intralaboratory split sample spiked with a representative set of target analytes. The purpose of this QC parameter is to monitor potential matrix effects on

analyte recoveries. Static Recovery Limits as per laboratory Data Quality Objectives (DQOs). Ideal recovery ranges stated may be waived in the event of sample matrix interference.

Sub-Matrix: SOIL Matrix Spike (MS) Report

SpikeRecovery(%) Recovery Limits (%)Spike

HighLowMSConcentrationLaboratory sample ID Client sample ID Method: Compound CAS Number


137645044 Hydromet SampleEP1308148-002 7429-90-5EG005T: Aluminium # Not

Determined

50 mg/kg 13070

7439-89-6EG005T: Iron # Not

Determined

50 mg/kg 13070


137645044 Hydromet SampleEP1308148-002 7440-38-2EG020X-T: Arsenic 12850 mg/kg 13070

7440-47-3EG020X-T: Chromium # Not

Determined

50 mg/kg 13070

7440-50-8EG020X-T: Copper 80.850 mg/kg 13070

7440-02-0EG020X-T: Nickel # Not

Determined

50 mg/kg 13070

7439-92-1EG020X-T: Lead 82.050 mg/kg 13070

7440-66-6EG020X-T: Zinc 83.850 mg/kg 13070

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Sub-Matrix: SOIL Matrix Spike (MS) Report




137645044 Hydromet SampleEP1308148-002 7782-49-2EG020Y-T: Selenium # Not

Determined

10 mg/kg 13070

7440-43-9EG020Y-T: Cadmium 10550 mg/kg 13070


137645044 Hydromet SampleEP1308148-002 7440-38-2EG020X-T: Arsenic # Not

Determined

50 mg/kg 13070

7440-47-3EG020X-T: Chromium # Not

Determined

50 mg/kg 13070

7440-50-8EG020X-T: Copper # Not

Determined

50 mg/kg 13070

7440-02-0EG020X-T: Nickel # Not

Determined

50 mg/kg 13070

7439-92-1EG020X-T: Lead # Not

Determined

50 mg/kg 13070

7440-66-6EG020X-T: Zinc # Not

Determined

50 mg/kg 13070


137645044 Hydromet SampleEP1308148-002 7782-49-2EG020Y-T: Selenium # Not

Determined

10 mg/kg 13070

7440-43-9EG020Y-T: Cadmium # Not

Determined

50 mg/kg 13070


137645044 Hydromet SampleEP1308148-002 7439-97-6EG035T: Mercury 86.410 mg/kg 13070

Sub-Matrix: WATER Matrix Spike (MS) Report




137645044 Flotation Tailings 16.3%EP1308148-004 14808-79-8ED041G: Sulfate as SO4 - Turbidimetric 97.1100 mg/L 13070


137645044 Flotation Tailings 16.3%EP1308148-001 14808-79-8ED041G: Sulfate as SO4 - Turbidimetric 97.5100 mg/L 13070


137645044 Treated Waste WaterEP1308148-003 16887-00-6ED045G: Chloride 92.11000 mg/L 13070


137645044 Flotation Tailings 16.3%EP1308148-004 16887-00-6ED045G: Chloride 1051000 mg/L 13070


137645044 Flotation Tailings 16.3%EP1308148-001 16887-00-6ED045G: Chloride 99.91000 mg/L 13070

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137645044 Flotation Tailings 16.3%EP1308148-004 7440-38-2EG020A-F: Arsenic 1010.200 mg/L 13070

7440-41-7EG020A-F: Beryllium 1090.200 mg/L 13070

7440-39-3EG020A-F: Barium 1030.200 mg/L 13070

7440-43-9EG020A-F: Cadmium 1170.0500 mg/L 13070

7440-47-3EG020A-F: Chromium 87.00.200 mg/L 13070

7440-48-4EG020A-F: Cobalt 91.40.200 mg/L 13070

7440-50-8EG020A-F: Copper 85.70.200 mg/L 13070

7439-92-1EG020A-F: Lead 1010.200 mg/L 13070

7439-96-5EG020A-F: Manganese 81.90.200 mg/L 13070

7440-02-0EG020A-F: Nickel 87.30.200 mg/L 13070

7440-62-2EG020A-F: Vanadium 91.20.20 mg/L 13070

7440-66-6EG020A-F: Zinc 96.60.200 mg/L 13070


137645044 Hydromet SampleEP1308148-002 7440-38-2EG020A-W: Arsenic 1091.000 mg/L 13070

7440-41-7EG020A-W: Beryllium 1061.000 mg/L 13070

7440-39-3EG020A-W: Barium 1041.000 mg/L 13070

7440-48-4EG020A-W: Cobalt 1021.000 mg/L 13070

7440-50-8EG020A-W: Copper 98.01.000 mg/L 13070

7439-92-1EG020A-W: Lead 1021.000 mg/L 13070

7439-96-5EG020A-W: Manganese 94.21.000 mg/L 13070

7440-02-0EG020A-W: Nickel 95.51.000 mg/L 13070

7440-66-6EG020A-W: Zinc 1041.000 mg/L 13070


137645044 Treated Waste WaterEP1308148-003 ----EK057G: Nitrite as N 95.20.5 mg/L 13070


137645044 Flotation Tailings 16.3%EP1308148-004 ----EK057G: Nitrite as N 1050.5 mg/L 13070


137645044 Flotation Tailings 16.3%EP1308148-001 ----EK057G: Nitrite as N 1080.5 mg/L 13070


137645044 Treated Waste WaterEP1308148-003 ----EK059G: Nitrite + Nitrate as N 87.40.5 mg/L 13070


AnonymousEP1308416-001 ----EK059G: Nitrite + Nitrate as N 1100.5 mg/L 13070


137645044 Flotation Tailings 16.3%EP1308148-001 ----EK059G: Nitrite + Nitrate as N 87.60.6 mg/L 13070


137645044 Treated Waste WaterEP1308148-003 ----EK067G: Total Phosphorus as P # Not

Determined

1 mg/L 13070

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AnonymousEP1308354-001 ----EK067G: Total Phosphorus as P 96.61 mg/L 13070


137645044 Flotation Tailings 16.3%EP1308148-001 ----EK067G: Total Phosphorus as P 85.71 mg/L 13070

Matrix Spike (MS) and Matrix Spike Duplicate (MSD) Report

The quality control term Matrix Spike (MS) and Matrix Spike Duplicate (MSD) refers to intralaboratory split samples spiked with a representative set of target analytes. The purpose of these QC parameters are to

monitor potential matrix effects on analyte recoveries. Static Recovery Limits as per laboratory Data Quality Objectives (DQOs). Ideal recovery ranges stated may be waived in the event of sample matrix interference.

Sub-Matrix: SOIL Matrix Spike (MS) and Matrix Spike Duplicate (MSD) Report

RPDs (%)Spike Recovery (%) Recovery Limits (%)Spike

Control LimitValueHighLowMSDMSConcentrationLaboratory sample ID Client sample ID Method: Compound CAS Number


137645044 Hydromet SampleEP1308148-002 7440-38-2EG020X-T: Arsenic --------12850 mg/kg 13070 ----

7440-47-3EG020X-T: Chromium --------# Not

Determined

50 mg/kg 13070 ----

7440-50-8EG020X-T: Copper --------80.850 mg/kg 13070 ----

7440-02-0EG020X-T: Nickel --------# Not

Determined

50 mg/kg 13070 ----

7439-92-1EG020X-T: Lead --------82.050 mg/kg 13070 ----

7440-66-6EG020X-T: Zinc --------83.850 mg/kg 13070 ----


137645044 Hydromet SampleEP1308148-002 7782-49-2EG020Y-T: Selenium --------# Not

Determined

10 mg/kg 13070 ----

7440-43-9EG020Y-T: Cadmium --------10550 mg/kg 13070 ----


137645044 Hydromet SampleEP1308148-002 7429-90-5EG005T: Aluminium --------# Not

Determined

50 mg/kg 13070 ----

7439-89-6EG005T: Iron --------# Not

Determined

50 mg/kg 13070 ----


137645044 Hydromet SampleEP1308148-002 7440-38-2EG020X-T: Arsenic --------# Not

Determined

50 mg/kg 13070 ----

7440-47-3EG020X-T: Chromium --------# Not

Determined

50 mg/kg 13070 ----

7440-50-8EG020X-T: Copper --------# Not

Determined

50 mg/kg 13070 ----

7440-02-0EG020X-T: Nickel --------# Not

Determined

50 mg/kg 13070 ----

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Sub-Matrix: SOIL Matrix Spike (MS) and Matrix Spike Duplicate (MSD) Report




137645044 Hydromet SampleEP1308148-002 7439-92-1EG020X-T: Lead --------# Not

Determined

50 mg/kg 13070 ----

7440-66-6EG020X-T: Zinc --------# Not

Determined

50 mg/kg 13070 ----


137645044 Hydromet SampleEP1308148-002 7782-49-2EG020Y-T: Selenium --------# Not

Determined

10 mg/kg 13070 ----

7440-43-9EG020Y-T: Cadmium --------# Not

Determined

50 mg/kg 13070 ----


137645044 Hydromet SampleEP1308148-002 7439-97-6EG035T: Mercury --------86.410 mg/kg 13070 ----

Sub-Matrix: WATER Matrix Spike (MS) and Matrix Spike Duplicate (MSD) Report




137645044 Treated Waste WaterEP1308148-003 ----EK057G: Nitrite as N --------95.20.5 mg/L 13070 ----


137645044 Treated Waste WaterEP1308148-003 16887-00-6ED045G: Chloride --------92.11000 mg/L 13070 ----


137645044 Treated Waste WaterEP1308148-003 ----EK059G: Nitrite + Nitrate as N --------87.40.5 mg/L 13070 ----


137645044 Treated Waste WaterEP1308148-003 ----EK067G: Total Phosphorus as P --------# Not

Determined

1 mg/L 13070 ----


137645044 Flotation Tailings 16.3%EP1308148-004 7440-38-2EG020A-F: Arsenic --------1010.200 mg/L 13070 ----

7440-41-7EG020A-F: Beryllium --------1090.200 mg/L 13070 ----

7440-39-3EG020A-F: Barium --------1030.200 mg/L 13070 ----

7440-43-9EG020A-F: Cadmium --------1170.0500 mg/L 13070 ----

7440-47-3EG020A-F: Chromium --------87.00.200 mg/L 13070 ----

7440-48-4EG020A-F: Cobalt --------91.40.200 mg/L 13070 ----

7440-50-8EG020A-F: Copper --------85.70.200 mg/L 13070 ----

7439-92-1EG020A-F: Lead --------1010.200 mg/L 13070 ----

7439-96-5EG020A-F: Manganese --------81.90.200 mg/L 13070 ----

7440-02-0EG020A-F: Nickel --------87.30.200 mg/L 13070 ----

7440-62-2EG020A-F: Vanadium --------91.20.20 mg/L 13070 ----

7440-66-6EG020A-F: Zinc --------96.60.200 mg/L 13070 ----


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Sub-Matrix: WATER Matrix Spike (MS) and Matrix Spike Duplicate (MSD) Report



EK057G: Nitrite as N by Discrete Analyser (QCLot: 3145405) - continued

137645044 Flotation Tailings 16.3%EP1308148-004 ----EK057G: Nitrite as N --------1050.5 mg/L 13070 ----


137645044 Flotation Tailings 16.3%EP1308148-004 16887-00-6ED045G: Chloride --------1051000 mg/L 13070 ----


137645044 Flotation Tailings 16.3%EP1308148-004 14808-79-8ED041G: Sulfate as SO4 - Turbidimetric --------97.1100 mg/L 13070 ----


AnonymousEP1308416-001 ----EK059G: Nitrite + Nitrate as N --------1100.5 mg/L 13070 ----


AnonymousEP1308354-001 ----EK067G: Total Phosphorus as P --------96.61 mg/L 13070 ----


137645044 Hydromet SampleEP1308148-002 7440-38-2EG020A-W: Arsenic --------1091.000 mg/L 13070 ----

7440-41-7EG020A-W: Beryllium --------1061.000 mg/L 13070 ----

7440-39-3EG020A-W: Barium --------1041.000 mg/L 13070 ----

7440-48-4EG020A-W: Cobalt --------1021.000 mg/L 13070 ----

7440-50-8EG020A-W: Copper --------98.01.000 mg/L 13070 ----

7439-92-1EG020A-W: Lead --------1021.000 mg/L 13070 ----

7439-96-5EG020A-W: Manganese --------94.21.000 mg/L 13070 ----

7440-02-0EG020A-W: Nickel --------95.51.000 mg/L 13070 ----

7440-66-6EG020A-W: Zinc --------1041.000 mg/L 13070 ----


137645044 Flotation Tailings 16.3%EP1308148-001 ----EK067G: Total Phosphorus as P --------85.71 mg/L 13070 ----


137645044 Flotation Tailings 16.3%EP1308148-001 ----EK057G: Nitrite as N --------1080.5 mg/L 13070 ----


137645044 Flotation Tailings 16.3%EP1308148-001 16887-00-6ED045G: Chloride --------99.91000 mg/L 13070 ----


137645044 Flotation Tailings 16.3%EP1308148-001 14808-79-8ED041G: Sulfate as SO4 - Turbidimetric --------97.5100 mg/L 13070 ----


137645044 Flotation Tailings 16.3%EP1308148-001 ----EK059G: Nitrite + Nitrate as N --------87.60.6 mg/L 13070 ----

True

Environmental

INTERPRETIVE QUALITY CONTROL REPORTWork Order : EP1308148 Page : 1 of 19

:Amendment 7

:: LaboratoryClient Environmental Division PerthGOLDER ASSOCIATES



WEST PERTH WA 6872






Site : Browns Range


H.C.:Sampler Issue Date : 31-MAR-2014

:Order number ----

No. of samples received : 4

Quote number : EP/825/13 V4 No. of samples analysed : 4

This report supersedes any previous report(s) with this reference. Results apply to the sample(s) as submitted. All pages of this report have been checked and approved for release.

This Interpretive Quality Control Report contains the following information:

l Analysis Holding Time Compliance

l Quality Control Parameter Frequency Compliance

l Brief Method Summaries

l Summary of Outliers



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Analysis Holding Time Compliance

This report summarizes extraction / preparation and analysis times and compares each with recommended holding times (USEPA SW 846, APHA, AS and NEPM) based on the sample container provided. Dates

reported represent first date of extraction or analysis and preclude subsequent dilutions and reruns. A listing of breaches (if any) is provided herein.

Holding time for leachate methods (e.g. TCLP) vary according to the analytes reported. Assessment compares the leach date with the shortest analyte holding time for the equivalent soil method. These are: organics

14 days, mercury 28 days & other metals 180 days. A recorded breach does not guarantee a breach for all non-volatile parameters.

Holding times for VOC in soils vary according to analytes of interest. Vinyl Chloride and Styrene holding time is 7 days; others 14 days. A recorded breach does not guarantee a breach for all VOC analytes and

should be verified in case the reported breach is a false positive or Vinyl Chloride and Styrene are not key analytes of interest/concern.

Matrix: SOIL Evaluation: û = Holding time breach ; ü = Within holding time.

AnalysisExtraction / PreparationSample DateMethod

EvaluationDue for analysisDate analysedEvaluationDue for extractionDate extractedContainer / Client Sample ID(s)


Clear Plastic Bottle - Natural (EA005-P)

137645044 Flotation Tailings - 16.3% 15-NOV-201315-NOV-2013 07-NOV-2013---15-NOV-2013 ---- üClear Plastic Bottle - Natural (EA005-P)

137645044 Hydromet Sample 15-NOV-201315-NOV-2013 19-NOV-2013---15-NOV-2013 ---- ûEA010P: Conductivity by PC Titrator


137645044 Flotation Tailings - 16.3% 13-DEC-201313-DEC-2013 07-NOV-2013---15-NOV-2013 ---- üClear Plastic Bottle - Natural (EA010-P)

137645044 Hydromet Sample 13-DEC-201313-DEC-2013 19-NOV-2013---15-NOV-2013 ---- üEA011: Net Acid Generation

Soil Glass Jar - Unpreserved (EA011)

137645044 Flotation Tailings - 16.3% 05-MAY-201425-OCT-2014 06-NOV-201306-NOV-201325-OCT-2013 ü üSoil Glass Jar - Unpreserved (EA011)

137645044 Hydromet Sample 23-APR-201425-OCT-2014 05-NOV-201325-OCT-201325-OCT-2013 ü üEA013: Acid Neutralising Capacity


137645044 Flotation Tailings - 16.3% 05-MAY-201425-OCT-2014 06-NOV-201306-NOV-201325-OCT-2013 ü üSoil Glass Jar - Unpreserved (EA013)

137645044 Hydromet Sample 23-APR-201425-OCT-2014 04-NOV-201325-OCT-201325-OCT-2013 ü üEA031: pH (saturated paste)


137645044 Flotation Tailings - 16.3%, 137645044 Hydromet Sample 23-APR-2014---- 19-NOV-2013----25-OCT-2013 ---- üEA032: Electrical Conductivity (saturated paste)


137645044 Flotation Tailings - 16.3%, 137645044 Hydromet Sample 23-APR-2014---- 19-NOV-2013----25-OCT-2013 ---- üEA055: Moisture Content

Soil Glass Jar - Unpreserved (EA055-103)

137645044 Hydromet Sample 08-NOV-2013---- 04-NOV-2013----25-OCT-2013 ---- üSoil Glass Jar - Unpreserved (EA055-103)

137645044 Flotation Tailings - 16.3%, 137645044 Hydromet Sample 08-NOV-2013---- 07-NOV-2013----25-OCT-2013 ---- ü

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Clear Plastic Bottle - Natural (ED037-P)

137645044 Flotation Tailings - 16.3% 29-NOV-201329-NOV-2013 07-NOV-2013---15-NOV-2013 ---- üClear Plastic Bottle - Natural (ED037-P)

137645044 Hydromet Sample 29-NOV-201329-NOV-2013 19-NOV-2013---15-NOV-2013 ---- üED038A: Acidity

Clear Plastic Bottle - Natural (ED038)

137645044 Flotation Tailings - 16.3%, 137645044 Hydromet Sample 29-NOV-2013---- 15-NOV-2013----15-NOV-2013 ---- üED040: Sulfur as SO4 2-

Soil Glass Jar - Unpreserved (ED040T)

137645044 Flotation Tailings - 16.3%, 137645044 Hydromet Sample 18-DEC-201301-NOV-2013 20-NOV-201320-NOV-201325-OCT-2013 û üED040T: Total Major Anions

Clear Plastic Bottle - Natural (ED040T)

137645044 Flotation Tailings - 16.3%, 137645044 Hydromet Sample 13-DEC-201313-DEC-2013 18-NOV-201318-NOV-201315-NOV-2013 ü üED040W: Water Leachable Sulfate by ICPAES

Clear Plastic Bottle - Natural (ED040W)

137645044 Flotation Tailings - 16.3%, 137645044 Hydromet Sample 13-DEC-201313-DEC-2013 15-NOV-201315-NOV-201315-NOV-2013 ü üED041G: Sulfate (Turbidimetric) as SO4 2- by DA

Clear Plastic Bottle - Natural (ED041G)

137645044 Flotation Tailings - 16.3%, 137645044 Hydromet Sample 13-DEC-201313-DEC-2013 15-NOV-2013---15-NOV-2013 ---- üED042T: Total Sulfur by LECO

80* dried soil (ED042T)

137645044 Flotation Tailings - 16.3%, 137645044 Hydromet Sample 12-MAY-201401-NOV-2013 15-NOV-201313-NOV-201325-OCT-2013 û üED045G: Chloride Discrete analyser


137645044 Flotation Tailings - 16.3%, 137645044 Hydromet Sample 13-DEC-201313-DEC-2013 15-NOV-2013---15-NOV-2013 ---- üED093F: Dissolved Major Cations

Clear Plastic Bottle - Natural (ED093F)

137645044 Flotation Tailings - 16.3%, 137645044 Hydromet Sample 22-NOV-201322-NOV-2013 18-NOV-2013---15-NOV-2013 ---- üED093T: Total Major Cations

Soil Glass Jar - Unpreserved (ED093T)

137645044 Flotation Tailings - 16.3%, 137645044 Hydromet Sample 23-APR-201423-APR-2014 19-FEB-201419-FEB-201425-OCT-2013 ü üEG005T: Total Metals by ICP-AES

Soil Glass Jar - Unpreserved (EG005T)

137645044 Hydromet Sample 23-APR-201423-APR-2014 05-NOV-201304-NOV-201325-OCT-2013 ü üSoil Glass Jar - Unpreserved (EG005T)

137645044 Flotation Tailings - 16.3%, 137645044 Hydromet Sample 23-APR-201423-APR-2014 14-NOV-201314-NOV-201325-OCT-2013 ü üEG020W: Water Leachable Metals by ICP-MS

Clear Plastic Bottle - Nitric Acid; Unfiltered (EG020A-W)

137645044 Flotation Tailings - 16.3%, 137645044 Hydromet Sample 14-MAY-201414-MAY-2014 15-NOV-201315-NOV-201315-NOV-2013 ü ü

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EG020W: Water Leachable Metals by ICP-MS

Clear Plastic Bottle - Nitric Acid; Unfiltered (EG020B-W)

137645044 Flotation Tailings - 16.3%, 137645044 Hydromet Sample 14-MAY-201414-MAY-2014 15-NOV-201315-NOV-201315-NOV-2013 ü üEG020W: Water Leachable Metals by ICP-MS

Clear Plastic Bottle - Nitric Acid; Unfiltered (EG020D-W)

137645044 Flotation Tailings - 16.3%, 137645044 Hydromet Sample 14-MAY-201414-MAY-2014 15-NOV-201315-NOV-201315-NOV-2013 ü üEG020T: Total Metals by ICP-MS

Soil Glass Jar - Unpreserved (EG020X-T)

137645044 Hydromet Sample 23-APR-201423-APR-2014 05-NOV-201304-NOV-201325-OCT-2013 ü üSoil Glass Jar - Unpreserved (EG020X-T)

137645044 Flotation Tailings - 16.3% 23-APR-201423-APR-2014 14-NOV-201314-NOV-201325-OCT-2013 ü üEG020T: Total Metals by ICP-MS

Soil Glass Jar - Unpreserved (EG020Y-T)

137645044 Hydromet Sample 23-APR-201423-APR-2014 05-NOV-201304-NOV-201325-OCT-2013 ü üSoil Glass Jar - Unpreserved (EG020Y-T)

137645044 Flotation Tailings - 16.3% 23-APR-201423-APR-2014 14-NOV-201314-NOV-201325-OCT-2013 ü üEG020T: Total Metals by ICP-MS

Soil Glass Jar - Unpreserved (EG020Z-T)

137645044 Hydromet Sample 23-APR-201423-APR-2014 05-NOV-201304-NOV-201325-OCT-2013 ü üSoil Glass Jar - Unpreserved (EG020Z-T)

137645044 Flotation Tailings - 16.3% 23-APR-201423-APR-2014 14-NOV-201314-NOV-201325-OCT-2013 ü üEG035T: Total Recoverable Mercury by FIMS

Soil Glass Jar - Unpreserved (EG035T)

137645044 Flotation Tailings - 16.3%, 137645044 Hydromet Sample 22-NOV-201322-NOV-2013 19-NOV-201319-NOV-201325-OCT-2013 ü üEG035W: Water Leachable Mercury by FIMS

Clear Plastic Bottle - Nitric Acid; Unfiltered (EG035W)

137645044 Flotation Tailings - 16.3% 13-DEC-2013---- 19-NOV-2013----15-NOV-2013 ---- üEK057G: Nitrite as N by Discrete Analyser

Clear Plastic Bottle - Natural (EK057G)

137645044 Flotation Tailings - 16.3%, 137645044 Hydromet Sample 17-NOV-201317-NOV-2013 15-NOV-2013---15-NOV-2013 ---- üEK059G: Nitrite plus Nitrate as N (NOx) by Discrete Analyser

Clear Plastic Bottle - Sulfuric Acid (EK059G)

137645044 Flotation Tailings - 16.3%, 137645044 Hydromet Sample 13-DEC-201313-DEC-2013 15-NOV-2013---15-NOV-2013 ---- üEK067G: Total Phosphorus as P by Discrete Analyser


137645044 Flotation Tailings - 16.3%, 137645044 Hydromet Sample 13-DEC-201313-DEC-2013 18-NOV-201318-NOV-201315-NOV-2013 ü üEN60: Bottle Leaching Procedure

LabSplit: Leach for organics and other tests (EN60-DIa)

137645044 Flotation Tailings - 16.3%, 137645044 Hydromet Sample 08-NOV-201308-NOV-2013 15-NOV-2013---25-OCT-2013 ---- ûMatrix: WATER Evaluation: û = Holding time breach ; ü = Within holding time.



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Matrix: WATER Evaluation: û = Holding time breach ; ü = Within holding time.





137645044 Flotation Tailings - 16.3% 25-OCT-201325-OCT-2013 07-NOV-2013---25-OCT-2013 ---- ûClear Plastic Bottle - Natural (EA005-P)

137645044 Treated Waste Water 25-OCT-201325-OCT-2013 31-OCT-2013---25-OCT-2013 ---- ûEA010P: Conductivity by PC Titrator


137645044 Flotation Tailings - 16.3% 22-NOV-201322-NOV-2013 07-NOV-2013---25-OCT-2013 ---- üClear Plastic Bottle - Natural (EA010-P)

137645044 Treated Waste Water 22-NOV-201322-NOV-2013 31-OCT-2013---25-OCT-2013 ---- üED037P: Alkalinity by PC Titrator

Clear Plastic Bottle - Natural (ED037-P)

137645044 Flotation Tailings - 16.3% 08-NOV-201308-NOV-2013 07-NOV-2013---25-OCT-2013 ---- üClear Plastic Bottle - Natural (ED037-P)

137645044 Treated Waste Water 08-NOV-201308-NOV-2013 31-OCT-2013---25-OCT-2013 ---- üED038A: Acidity

Clear Plastic Bottle - Natural (ED038)

137645044 Treated Waste Water 08-NOV-2013---- 04-NOV-2013----25-OCT-2013 ---- üClear Plastic Bottle - Natural (ED038)

137645044 Flotation Tailings - 16.3% 08-NOV-2013---- 07-NOV-2013----25-OCT-2013 ---- üED040F: Dissolved Major Anions


137645044 Treated Waste Water 22-NOV-201322-NOV-2013 04-NOV-2013---25-OCT-2013 ---- üClear Plastic Bottle - Natural (ED040F)

137645044 Flotation Tailings - 16.3% 22-NOV-201322-NOV-2013 07-NOV-2013---25-OCT-2013 ---- üED041G: Sulfate (Turbidimetric) as SO4 2- by DA


137645044 Flotation Tailings - 16.3% 22-NOV-201322-NOV-2013 06-NOV-2013---25-OCT-2013 ---- üClear Plastic Bottle - Natural (ED041G)

137645044 Treated Waste Water 22-NOV-201322-NOV-2013 25-OCT-2013---25-OCT-2013 ---- üED045G: Chloride Discrete analyser


137645044 Flotation Tailings - 16.3% 22-NOV-201322-NOV-2013 06-NOV-2013---25-OCT-2013 ---- üClear Plastic Bottle - Natural (ED045G)

137645044 Treated Waste Water 22-NOV-201322-NOV-2013 25-OCT-2013---25-OCT-2013 ---- üED093F: Dissolved Major Cations


137645044 Treated Waste Water 01-NOV-201301-NOV-2013 04-NOV-2013---25-OCT-2013 ---- ûClear Plastic Bottle - Natural (ED093F)

137645044 Flotation Tailings - 16.3% 01-NOV-201301-NOV-2013 07-NOV-2013---25-OCT-2013 ---- û

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Matrix: WATER Evaluation: û = Holding time breach ; ü = Within holding time.



EG020F: Dissolved Metals by ICP-MS

Clear Plastic Bottle - Filtered; Lab-acidified (EG020A-F)

137645044 Treated Waste Water 23-APR-201423-APR-2014 01-NOV-2013---25-OCT-2013 ---- üClear Plastic Bottle - Filtered; Lab-acidified (EG020A-F)

137645044 Flotation Tailings - 16.3% 23-APR-201423-APR-2014 08-NOV-2013---25-OCT-2013 ---- üEG020F: Dissolved Metals by ICP-MS

Clear Plastic Bottle - Filtered; Lab-acidified (EG020B-F)

137645044 Treated Waste Water 23-APR-201423-APR-2014 01-NOV-2013---25-OCT-2013 ---- üClear Plastic Bottle - Filtered; Lab-acidified (EG020B-F)

137645044 Flotation Tailings - 16.3% 23-APR-201423-APR-2014 08-NOV-2013---25-OCT-2013 ---- üEG020F: Dissolved Metals by ICP-MS

Clear Plastic Bottle - Filtered; Lab-acidified (EG020D-F)

137645044 Treated Waste Water 23-APR-201423-APR-2014 01-NOV-2013---25-OCT-2013 ---- üClear Plastic Bottle - Filtered; Lab-acidified (EG020D-F)

137645044 Flotation Tailings - 16.3% 23-APR-201423-APR-2014 08-NOV-2013---25-OCT-2013 ---- üEK057G: Nitrite as N by Discrete Analyser


137645044 Treated Waste Water 26-OCT-201326-OCT-2013 25-OCT-2013---25-OCT-2013 ---- üClear Plastic Bottle - Natural (EK057G)

137645044 Flotation Tailings - 16.3% 27-OCT-201327-OCT-2013 06-NOV-2013---25-OCT-2013 ---- ûEK059G: Nitrite plus Nitrate as N (NOx) by Discrete Analyser


137645044 Treated Waste Water 26-OCT-201326-OCT-2013 25-OCT-2013---25-OCT-2013 ---- üClear Plastic Bottle - Sulfuric Acid (EK059G)

137645044 Flotation Tailings - 16.3% 22-NOV-201322-NOV-2013 06-NOV-2013---25-OCT-2013 ---- üEK067G: Total Phosphorus as P by Discrete Analyser


137645044 Treated Waste Water 22-NOV-201322-NOV-2013 06-NOV-201305-NOV-201325-OCT-2013 ü üClear Plastic Bottle - Sulfuric Acid (EK067G)

137645044 Flotation Tailings - 16.3% 22-NOV-201322-NOV-2013 11-NOV-201311-NOV-201325-OCT-2013 ü ü

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Quality Control Parameter Frequency ComplianceThe following report summarises the frequency of laboratory QC samples analysed within the analytical lot(s) in which the submitted sample(s) was(where) processed. Actual rate should be greater than or equal to

the expected rate. A listing of breaches is provided in the Summary of Outliers.

Matrix: SOIL Evaluation: û = Quality Control frequency not within specification ; ü = Quality Control frequency within specification.

Quality Control SpecificationQuality Control Sample Type

ExpectedQC Regular Actual

Rate (%)Quality Control Sample Type CountEvaluationAnalytical Methods Method

Laboratory Duplicates (DUP)

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 100.0 10.02 2 üAcid Neutralising Capacity (ANC) EA013

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 50.0 10.01 2 üElectrical Conductivity (Saturated Paste) EA032

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 50.0 10.01 2 üMajor Cations by ICPAES - Total ED093T

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 50.0 10.01 2 üMoisture Content EA055-103

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 100.0 10.02 2 üNet Acid Generation EA011

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 50.0 10.01 2 üpH (Saturated Paste) EA031

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 50.0 10.01 2 üSulfate as SO4 2- Total ED040T

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 50.0 10.01 2 üSulfur - Total as S (LECO) ED042T

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 50.0 10.01 2 üTotal Mercury by FIMS EG035T

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 50.0 10.01 2 üTotal Metals by ICP-AES EG005T

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 100.0 10.02 2 üTotal Metals by ICP-MS - Suite X EG020X-T

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 100.0 10.02 2 üTotal Metals by ICP-MS - Suite Y EG020Y-T

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 100.0 10.02 2 üTotal Metals by ICP-MS - Suite Z EG020Z-T

Laboratory Control Samples (LCS)



NEPM 2013 Schedule B(3) and ALS QCS3 requirement 100.0 5.02 2 üNet Acid Generation EA011

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 100.0 10.02 2 üpH (Saturated Paste) EA031






Method Blanks (MB)



NEPM 2013 Schedule B(3) and ALS QCS3 requirement 50.0 5.01 2 üMajor Cations by ICPAES - Total ED093T

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 50.0 5.01 2 üSulfate as SO4 2- Total ED040T






NEPM 2013 Schedule B(3) and ALS QCS3 requirement 100.0 5.02 2 üTotal Metals by ICP-MS - Suite Z EG020Z-T

Matrix Spikes (MS)


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Matrix: SOIL Evaluation: û = Quality Control frequency not within specification ; ü = Quality Control frequency within specification.




Matrix Spikes (MS) - Continued




Matrix: WATER Evaluation: û = Quality Control frequency not within specification ; ü = Quality Control frequency within specification.




Laboratory Duplicates (DUP)

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 14.7 10.05 34 üAcidity as Calcium Carbonate ED038

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 17.9 10.07 39 üAlkalinity by PC Titrator ED037-P

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 15.8 10.03 19 üChloride by Discrete Analyser ED045G

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 17.5 10.07 40 üConductivity by PC Titrator EA010-P

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 100.0 10.02 2 üDissolved Metals by ICP-MS - Suite A EG020A-F

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 100.0 10.02 2 üDissolved Metals by ICP-MS - Suite B EG020B-F

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 100.0 10.02 2 üDissolved Metals by ICP-MS - Suite D EG020D-F

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 50.0 10.02 4 üMajor Anions - Dissolved ED040F

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 50.0 10.01 2 üMajor Anions - Total ED040T

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 15.8 10.03 19 üMajor Cations - Dissolved ED093F

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 17.2 10.05 29 üNitrite and Nitrate as N (NOx) by Discrete Analyser EK059G

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 18.8 10.03 16 üNitrite as N by Discrete Analyser EK057G

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 17.5 10.07 40 üpH by PC Titrator EA005-P

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 15.8 10.03 19 üSulfate (Turbidimetric) as SO4 2- by Discrete Analyser ED041G

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 12.2 10.05 41 üTotal Phosphorus as P By Discrete Analyser EK067G

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 50.0 10.01 2 üWater Leachable Anions by ICPAES ED040W

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 100.0 10.01 1 üWater Leachable Mercury by FIMS EG035W

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 50.0 10.01 2 üWater Leachable Metals by ICP-MS - Suite A EG020A-W

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 50.0 10.01 2 üWater Leachable Metals by ICP-MS - Suite B EG020B-W

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 50.0 10.01 2 üWater Leachable Metals by ICP-MS - Suite C EG020D-W

Laboratory Control Samples (LCS)

NEPM 2013 Schedule B(3) and ALS QCS3 requirement 8.8 5.03 34 üAcidity as Calcium Carbonate ED038










NEPM 2013 Schedule B(3) and ALS QCS3 requirement 20.0 10.08 40 üpH by PC Titrator EA005-P

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Matrix: WATER Evaluation: û = Quality Control frequency not within specification ; ü = Quality Control frequency within specification.




Laboratory Control Samples (LCS) - Continued






Method Blanks (MB)






NEPM 2013 Schedule B(3) and ALS QCS3 requirement 100.0 5.02 2 üDissolved Metals by ICP-MS - Suite D EG020D-F


NEPM 2013 Schedule B(3) and ALS QCS3 requirement 50.0 5.01 2 üMajor Anions - Total ED040T






NEPM 2013 Schedule B(3) and ALS QCS3 requirement 50.0 5.01 2 üWater Leachable Anions by ICPAES ED040W




NEPM 2013 Schedule B(3) and ALS QCS3 requirement 50.0 5.01 2 üWater Leachable Metals by ICP-MS - Suite C EG020D-W

Matrix Spikes (MS)








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Brief Method SummariesThe analytical procedures used by the Environmental Division have been developed from established internationally recognized procedures such as those published by the US EPA, APHA, AS and NEPM. In house

developed procedures are employed in the absence of documented standards or by client request. The following report provides brief descriptions of the analytical procedures employed for results reported in the

Certificate of Analysis. Sources from which ALS methods have been developed are provided within the Method Descriptions.

Analytical Methods Method DescriptionsMatrixMethod

APHA 21st ed. 4500 H+ B. This procedure determines pH of water samples by automated ISE. This method is

compliant with NEPM (2013) Schedule B(3)

pH by PC Titrator EA005-P SOIL

Coastech Research (Canada)(Mod.). NAPP = Acid Production Potential (APP or MAP- Maximum Acid Potential)

minus Neutralising Capacity (ANC). NAPP may be +ve, zero or -ve.

Net Acid Production Potential EA009 SOIL

APHA 21st ed., 2510 B This procedure determines conductivity by automated ISE. This method is compliant with

NEPM (2013) Schedule B(3)

Conductivity by PC Titrator EA010-P SOIL

Miller (1998) Titremetric procedure determines net acidity in a soil following peroxide oxidation. Titrations to both

pH 4.5 and pH 7 are reported.

Net Acid Generation EA011 SOIL

USEPA 600/2-78-054, I. Miller (2000). A fizz test is done to semiquanititatively estimate the likely reactivity. The

soil is then reacted with an known excess quanitity of an appropriate acid. Titration determines the acid

remaining, and the ANC can be calculated from comparison with a blank titration.

Acid Neutralising Capacity (ANC) EA013 SOIL

USEPA 600/2 - 78 - 054 - pH determined on a saturated paste by ISE.pH (Saturated Paste) EA031 SOIL

USEPA 600/2 - 78 - 054 - conductivity determined on a saturated paste.Electrical Conductivity (Saturated Paste) EA032 SOIL

A gravimetric procedure based on weight loss over a 12 hour drying period at 103-105 degrees C. This method

is compliant with NEPM (2013) Schedule B(3) Section 7.1 and Table 1 (14 day holding time).

Moisture Content EA055-103 SOIL

APHA 21st ed., 2320 B This procedure determines alkalinity by automated measurement (e.g. PC Titrate) using

pH 4.5 for indicating the total alkalinity end-point. This method is compliant with NEPM (2013) Schedule B(3)

Alkalinity by PC Titrator ED037-P SOIL

APHA 21st ed., 2310 B Acidity is determined by titration with a standardised alkali to an end-point pH of 8.3. This

method is compliant with NEPM (2013) Schedule B(3)

Acidity as Calcium Carbonate ED038 SOIL

In-house. Total Sulfate is determined off a HCl digestion by ICPAES as S , and reported as SO4Sulfate as SO4 2- Total ED040T SOIL

(APHA 21st ed., 3120, ALS QWI-EN/ED040) Sulfur and/or Silicon content is determined by ICP/AES and reported

as Sulfate and/or Silica after conversion by gravimetric factor.

Water Leachable Anions by ICPAES ED040W SOIL

APHA 21st ed., 4500-SO4 Dissolved sulfate is determined in a 0.45um filtered sample. Sulfate ions are

converted to a barium sulfate suspension in an acetic acid medium with barium chloride. Light absorbance of

the BaSO4 suspension is measured by a photometer and the SO4-2 concentration is determined by comparison

of the reading with a standard curve. This method is compliant with NEPM (2013) Schedule B(3)

Sulfate (Turbidimetric) as SO4 2- by

Discrete Analyser

ED041G SOIL

In-house. Dried and pulverised sample is combusted in a high temperature furnace in the presence of strong

oxidants / catalysts. The evolved S (as SO2) is measured by infra-red detector

Sulfur - Total as S (LECO) ED042T SOIL

APHA 21st ed., 4500 Cl - G.The thiocyanate ion is liberated from mercuric thiocyanate through sequestration of

mercury by the chloride ion to form non-ionised mercuric chloride.in the presence of ferric ions the librated

thiocynate forms highly-coloured ferric thiocynate which is measured at 480 nm APHA 21st edition seal method 2

017-1-L april 2003

Chloride by Discrete Analyser ED045G SOIL

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Major Cations is determined based on APHA 21st ed., 3120; USEPA SW 846 - 6010 The ICPAES technique

ionises the 0.45um filtered sample atoms emitting a characteristic spectrum. This spectrum is then compared

against matrix matched standards for quantification. This method is compliant with NEPM (2013) Schedule B(3)

Sodium Adsorption Ratio is calculated from Ca, Mg and Na which determined by ALS in house method

QWI-EN/ED093F. This method is compliant with NEPM (2013) Schedule B(3)

Hardness parameters are calculated based on APHA 21st ed., 2340 B. This method is compliant with NEPM

(2013) Schedule B(3)

Major Cations - Dissolved ED093F SOIL

APHA 21st ed., 3120; USEPA SW 846 - 6010 (ICPAES) Major cations are determined following an appropriate

acid digestion of the soil. The ICPAES technique ionises samples in a plasma, emitting a characteristic

spectrum based on metals present. Intensities at selected wavelengths are compared against those of matrix

matched standards. This method is compliant with NEPM (2013) Schedule B(3)

Major Cations by ICPAES - Total ED093T SOIL

(APHA 21st ed., 3120; USEPA SW 846 - 6010) (ICPAES) Metals are determined following an appropriate acid

digestion of the soil. The ICPAES technique ionises samples in a plasma, emitting a characteristic spectrum

based on metals present. Intensities at selected wavelengths are compared against those of matrix matched

standards. This method is compliant with NEPM (2013) Schedule B(3)

Total Metals by ICP-AES EG005T SOIL

(APHA 21st ed., 3125; USEPA SW846 - 6020, AS 4439.3, ALS QWI-EN/EG020): The ICPMS technique utilizes a

highly efficient argon plasma to ionize selected elements. Ions are then passed into a high vacuum mass

spectrometer, which separates the analytes based on their distinct mass to charge ratios prior to their

measurement by a discrete dynode ion detector.

Water Leachable Metals by ICP-MS -

Suite A

EG020A-W SOIL

(APHA 21st ed., 3125; USEPA SW846 - 6020, ALS QWI-EN/EG020): The ICPMS technique utilizes a highly

efficient argon plasma to ionize selected elements. Ions are then passed into a high vacuum mass




Suite B

EG020B-W SOIL






Suite C

EG020D-W SOIL





Total Metals by ICP-MS - Suite X EG020X-T SOIL





Total Metals by ICP-MS - Suite Y EG020Y-T SOIL





Total Metals by ICP-MS - Suite Z EG020Z-T SOIL

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AS 3550, APHA 21st ed., 3112 Hg - B (Flow-injection (SnCl2)(Cold Vapour generation) AAS) FIM-AAS is an

automated flameless atomic absorption technique. Mercury in solids are determined following an appropriate

acid digestion. Ionic mercury is reduced online to atomic mercury vapour by SnCl2 which is then purged into a

heated quartz cell. Quantification is by comparing absorbance against a calibration curve. This method is


Total Mercury by FIMS EG035T SOIL

AS 3550, APHA 21st ed. 3112 Hg - B (Flow-injection (SnCl2)(Cold Vapour generation) AAS) FIM-AAS is an

automated flameless atomic absorption technique. A bromate/bromide reagent is used to oxidise any organic

mercury compounds in the TCLP solution. The ionic mercury is reduced online to atomic mercury vapour by

SnCl2 which is then purged into a heated quartz cell. Quantification is by comparing absorbance against a

calibration curve. This method is compliant with NEPM (2013) Schedule B(3)

Water Leachable Mercury by FIMS EG035W SOIL

APHA 21st ed., 4500-NO2- B. Nitrite is determined by direct colourimetry by Discrete Analyser. This method is


Nitrite as N by Discrete Analyser EK057G SOIL

APHA 21st ed., 4500-NO3- F. Nitrate is reduced to nitrite by way of a chemical reduction followed by quantification

by Discrete Analyser. Nitrite is determined seperately by direct colourimetry and result for Nitrate calculated as

the difference between the two results. This method is compliant with NEPM (2013) Schedule B(3)

Nitrate as N by Discrete Analyser EK058G SOIL

APHA 21st ed., 4500-NO3- F. Combined oxidised Nitrogen (NO2+NO3) is determined by Chemical Reduction

and direct colourimetry by Discrete Analyser. This method is compliant with NEPM (2013) Schedule B(3)

Nitrite and Nitrate as N (NOx) by Discrete

Analyser

EK059G SOIL

APHA 21st ed., 4500-P H, Jirka et al (1976), Zhang et al (2006). This procedure involves sulphuric acid digestion

of a sample aliquot to break phosphorus down to orthophosphate. The orthophosphate reacts with ammonium

molybdate and antimony potassium tartrate to form a complex which is then reduced and its concentration

measured at 880nm using discrete analyser. This method is compliant with NEPM (2013) Schedule B(3)

Total Phosphorus as P By Discrete

Analyser

EK067G SOIL

APHA 21st Ed. 1030F. The Ionic Balance is calculated based on the major Anions and Cations. The major

anions include Alkalinity, Chloride and Sulfate which determined by PCT and DA. The Cations are determined by

Turbi SO4 by DA. This method is compliant with NEPM (2013) Schedule B(3)

Ionic Balance by PCT DA and Turbi SO4

DA

EN055 - PG SOIL

APHA 21st ed. 4500 H+ B. This procedure determines pH of water samples by automated ISE. This method is


pH by PC Titrator EA005-P WATER

APHA 21st ed., 2510 B This procedure determines conductivity by automated ISE. This method is compliant with

NEPM (2013) Schedule B(3)

Conductivity by PC Titrator EA010-P WATER

APHA 21st ed., 2320 B This procedure determines alkalinity by automated measurement (e.g. PC Titrate) using

pH 4.5 for indicating the total alkalinity end-point. This method is compliant with NEPM (2013) Schedule B(3)

Alkalinity by PC Titrator ED037-P WATER

APHA 21st ed., 2310 B Acidity is determined by titration with a standardised alkali to an end-point pH of 8.3. This

method is compliant with NEPM (2013) Schedule B(3)

Acidity as Calcium Carbonate ED038 WATER

APHA 21st ed., 3120. The 0.45um filtered samples are determined by ICP/AES for Sulfur and/or Silcon content

and reported as Sulfate and/or Silica after conversion by gravimetric factor.

Major Anions - Dissolved ED040F WATER

APHA 21st ed., 4500-SO4 Dissolved sulfate is determined in a 0.45um filtered sample. Sulfate ions are

converted to a barium sulfate suspension in an acetic acid medium with barium chloride. Light absorbance of

the BaSO4 suspension is measured by a photometer and the SO4-2 concentration is determined by comparison

of the reading with a standard curve. This method is compliant with NEPM (2013) Schedule B(3)

Sulfate (Turbidimetric) as SO4 2- by

Discrete Analyser

ED041G WATER

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APHA 21st ed., 4500 Cl - G.The thiocyanate ion is liberated from mercuric thiocyanate through sequestration of

mercury by the chloride ion to form non-ionised mercuric chloride.in the presence of ferric ions the librated

thiocynate forms highly-coloured ferric thiocynate which is measured at 480 nm APHA 21st edition seal method 2

017-1-L april 2003

Chloride by Discrete Analyser ED045G WATER

Major Cations is determined based on APHA 21st ed., 3120; USEPA SW 846 - 6010 The ICPAES technique

ionises the 0.45um filtered sample atoms emitting a characteristic spectrum. This spectrum is then compared

against matrix matched standards for quantification. This method is compliant with NEPM (2013) Schedule B(3)

Sodium Adsorption Ratio is calculated from Ca, Mg and Na which determined by ALS in house method

QWI-EN/ED093F. This method is compliant with NEPM (2013) Schedule B(3)

Hardness parameters are calculated based on APHA 21st ed., 2340 B. This method is compliant with NEPM

(2013) Schedule B(3)

Major Cations - Dissolved ED093F WATER

(APHA 21st ed., 3125; USEPA SW846 - 6020, ALS QWI-EN/EG020): Samples are 0.45 um filtered prior to

analysis. The ICPMS technique utilizes a highly efficient argon plasma to ionize selected elements. Ions are

then passed into a high vacuum mass spectrometer, which separates the analytes based on their distinct mass

to charge ratios prior to their measurement by a discrete dynode ion detector.

Dissolved Metals by ICP-MS - Suite A EG020A-F WATER


analysis. The ICPMS technique utilizes a highly efficient argon plasma to ionize selected elements. Ions are

then passed into a high vacuum mass spectrometer, which separates the analytes based on their distinct mass

to charge ratios prior to their measurement by a discrete dynode ion detector.

Dissolved Metals by ICP-MS - Suite B EG020B-F WATER


analysis. The ICPMS technique utilizes a highly efficient argon plasma to ionize selected elements. Ions are then

passed into a high vacuum mass spectrometer, which separates the analytes based on their distinct mass to

charge ratios prior to their measurement by a discrete dynode ion detector.

Dissolved Metals by ICP-MS - Suite D EG020D-F WATER

APHA 21st ed., 4500-NO2- B. Nitrite is determined by direct colourimetry by Discrete Analyser. This method is


Nitrite as N by Discrete Analyser EK057G WATER

APHA 21st ed., 4500-NO3- F. Nitrate is reduced to nitrite by way of a chemical reduction followed by quantification

by Discrete Analyser. Nitrite is determined seperately by direct colourimetry and result for Nitrate calculated as

the difference between the two results. This method is compliant with NEPM (2013) Schedule B(3)

Nitrate as N by Discrete Analyser EK058G WATER

APHA 21st ed., 4500-NO3- F. Combined oxidised Nitrogen (NO2+NO3) is determined by Chemical Reduction

and direct colourimetry by Discrete Analyser. This method is compliant with NEPM (2013) Schedule B(3)

Nitrite and Nitrate as N (NOx) by Discrete

Analyser

EK059G WATER

APHA 21st ed., 4500-P H, Jirka et al (1976), Zhang et al (2006). This procedure involves sulphuric acid digestion

of a sample aliquot to break phosphorus down to orthophosphate. The orthophosphate reacts with ammonium

molybdate and antimony potassium tartrate to form a complex which is then reduced and its concentration

measured at 880nm using discrete analyser. This method is compliant with NEPM (2013) Schedule B(3)

Total Phosphorus as P By Discrete

Analyser

EK067G WATER

APHA 21st Ed. 1030F. The Ionic Balance is calculated based on the major Anions and Cations. The major

anions include Alkalinity, Chloride and Sulfate which determined by PCT and DA. The Cations are determined by

Turbi SO4 by DA. This method is compliant with NEPM (2013) Schedule B(3)

Ionic Balance by PCT DA and Turbi SO4

DA

EN055 - PG WATER

Preparation Methods Method DescriptionsMatrixMethod

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Preparation Methods Method DescriptionsMatrixMethod

APHA 21st ed., 4500 Norg - D; APHA 21st ed., 4500 P - H. This method is compliant with NEPM (2013) Schedule

B(3)

TKN/TP Digestion EK061/EK067 SOIL

In houseDrying at 85 degrees, bagging and

labelling (ASS)

EN020PR SOIL

1g of soil is digested in 30 ml of 30% HCl and the resultant digest bulked and filtered for analysis by ICP.HCl Digest EN24 SOIL

USEPA SW846-3005 Method 3005 is a Nitric/Hydrochloric acid digestion procedure used to prepare surface and

ground water samples for analysis by ICPAES or ICPMS. This method is compliant with NEPM (2013) Schedule

B(3)

Digestion for Total Recoverable Metals EN25 SOIL



B(3)

Digestion for Total Recoverable Metals

in TCLP Leachate

EN25C SOIL



B(3)

Digestion for Total Recoverable Metals

in DI Water Leachate

EN25W SOIL

In house QWI-EN/60 referenced to AS4439.3 Preparation of LeachatesDeionised Water Leach EN60-DIa SOIL

USEPA 200.2 Mod. Hot Block Acid Digestion 1.0g of sample is heated with Nitric and Hydrochloric acids, then

cooled. Peroxide is added and samples heated and cooled again before being filtered and bulked to volume for

analysis. Digest is appropriate for determination of selected metals in sludge, sediments, and soils. This

method is compliant with NEPM (2013) Schedule B(3) (Method 202)

Hot Block Digest for metals in soils

sediments and sludges

EN69 SOIL

APHA 21st ed., 4500 Norg - D; APHA 21st ed., 4500 P - H. This method is compliant with NEPM (2013) Schedule

B(3)

TKN/TP Digestion EK061/EK067 WATER

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Summary of Outliers

Outliers : Quality Control Samples

The following report highlights outliers flagged in the Quality Control (QC) Report. Surrogate recovery limits are static and based on USEPA SW846 or ALS-QWI/EN/38 (in the absence of specific USEPA limits). This

report displays QC Outliers (breaches) only.

Duplicates, Method Blanks, Laboratory Control Samples and Matrix Spikes

Matrix: SOIL

Compound Group Name CommentLimitsDataAnalyteClient Sample IDLaboratory Sample ID CAS Number

Duplicate (DUP) RPDs

EP1308148-002 7440-38-2Arsenic137645044 Hydromet Sample Analyte not determined in allocated

original sample.

Not

Determined


EP1308148-002 7440-38-2Arsenic137645044 Hydromet Sample RPD exceeds LOR based limitsNot

Determined


EP1308148-002 7440-39-3Barium137645044 Hydromet Sample Analyte not determined in allocated

original sample.

Not

Determined


EP1308148-002 7440-39-3Barium137645044 Hydromet Sample RPD exceeds LOR based limitsNot

Determined


EP1308148-002 7440-41-7Beryllium137645044 Hydromet Sample Analyte not determined in allocated

original sample.

Not

Determined


EP1308148-002 7440-48-4Cobalt137645044 Hydromet Sample Analyte not determined in allocated

original sample.

Not

Determined


EP1308148-002 7440-48-4Cobalt137645044 Hydromet Sample RPD exceeds LOR based limitsNot

Determined


EP1308148-002 7440-47-3Chromium137645044 Hydromet Sample RPD exceeds LOR based limitsNot

Determined


EP1308148-002 7440-47-3Chromium137645044 Hydromet Sample Analyte not determined in allocated

original sample.

Not

Determined


EP1308148-002 7440-50-8Copper137645044 Hydromet Sample Analyte not determined in allocated

original sample.

Not

Determined


EP1308148-002 7440-50-8Copper137645044 Hydromet Sample RPD exceeds LOR based limitsNot

Determined


EP1308148-002 7439-96-5Manganese137645044 Hydromet Sample Analyte not determined in allocated

original sample.

Not

Determined


EP1308148-002 7439-96-5Manganese137645044 Hydromet Sample RPD exceeds LOR based limitsNot

Determined


EP1308148-002 7439-98-7Molybdenum137645044 Hydromet Sample Analyte not determined in allocated

original sample.

Not

Determined


EP1308148-002 7439-98-7Molybdenum137645044 Hydromet Sample RPD exceeds LOR based limitsNot

Determined


EP1308148-002 7440-02-0Nickel137645044 Hydromet Sample Analyte not determined in allocated

original sample.

Not

Determined


EP1308148-002 7440-02-0Nickel137645044 Hydromet Sample RPD exceeds LOR based limitsNot

Determined


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Matrix: SOIL


Duplicate (DUP) RPDs - Continued

EP1308148-002 7439-92-1Lead137645044 Hydromet Sample Analyte not determined in allocated

original sample.

Not

Determined


EP1308148-002 7439-92-1Lead137645044 Hydromet Sample RPD exceeds LOR based limitsNot

Determined


EP1308148-002 7440-36-0Antimony137645044 Hydromet Sample RPD exceeds LOR based limitsNot

Determined


EP1308148-002 7440-36-0Antimony137645044 Hydromet Sample Analyte not determined in allocated

original sample.

Not

Determined


EP1308148-002 7440-61-1Uranium137645044 Hydromet Sample RPD exceeds LOR based limitsNot

Determined


EP1308148-002 7440-61-1Uranium137645044 Hydromet Sample Analyte not determined in allocated

original sample.

Not

Determined


EP1308148-002 7440-66-6Zinc137645044 Hydromet Sample Analyte not determined in allocated

original sample.

Not

Determined


EP1308148-002 7440-66-6Zinc137645044 Hydromet Sample RPD exceeds LOR based limitsNot

Determined


EP1308148-002 7439-93-2Lithium137645044 Hydromet Sample Analyte not determined in allocated

original sample.

Not

Determined


EP1308148-002 7439-93-2Lithium137645044 Hydromet Sample RPD exceeds LOR based limits0-20%141 %EG020T: Total Metals by ICP-MS

EP1308148-002 7440-62-2Vanadium137645044 Hydromet Sample Analyte not determined in allocated

original sample.

Not

Determined


EP1308148-002 7440-31-5Tin137645044 Hydromet Sample RPD exceeds LOR based limitsNot

Determined


EP1308148-002 7440-31-5Tin137645044 Hydromet Sample Analyte not determined in allocated

original sample.

Not

Determined


EP1308148-002 7782-49-2Selenium137645044 Hydromet Sample Analyte not determined in allocated

original sample.

Not

Determined


EP1308148-002 7782-49-2Selenium137645044 Hydromet Sample RPD exceeds LOR based limitsNot

Determined


EP1308148-002 7440-28-0Thallium137645044 Hydromet Sample Analyte not determined in allocated

original sample.

Not

Determined


EP1308148-002 7440-43-9Cadmium137645044 Hydromet Sample Analyte not determined in allocated

original sample.

Not

Determined


EP1308148-002 7440-69-9Bismuth137645044 Hydromet Sample RPD exceeds LOR based limitsNot

Determined


EP1308148-002 7440-69-9Bismuth137645044 Hydromet Sample Analyte not determined in allocated

original sample.

Not

Determined


EP1308148-002 7440-29-1Thorium137645044 Hydromet Sample Analyte not determined in allocated

original sample.

Not

Determined


EP1308148-002 7440-29-1Thorium137645044 Hydromet Sample RPD exceeds LOR based limitsNot

Determined


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Matrix: SOIL


Duplicate (DUP) RPDs - Continued

EP1308148-002 7440-22-4Silver137645044 Hydromet Sample RPD exceeds LOR based limitsNot

Determined


EP1308148-002 7440-22-4Silver137645044 Hydromet Sample Analyte not determined in allocated

original sample.

Not

Determined


Matrix Spike (MS) Recoveries

EP1308148-002 7429-90-5Aluminium137645044 Hydromet Sample MS recovery not determined,

background level greater than or

equal to 4x spike level.

----Not

Determined


EP1308148-002 7439-89-6Iron137645044 Hydromet Sample MS recovery not determined,



----Not

Determined


EP1308148-002 7440-38-2Arsenic137645044 Hydromet Sample Background level of analyte not

determined in original.

----Not

Determined


EP1308148-002 7440-47-3Chromium137645044 Hydromet Sample Background level of analyte not


----Not

Determined


EP1308148-002 7440-47-3Chromium137645044 Hydromet Sample MS recovery not determined,



----Not

Determined


EP1308148-002 7440-50-8Copper137645044 Hydromet Sample Background level of analyte not


----Not

Determined


EP1308148-002 7440-02-0Nickel137645044 Hydromet Sample Background level of analyte not


----Not

Determined


EP1308148-002 7440-02-0Nickel137645044 Hydromet Sample MS recovery not determined,



----Not

Determined


EP1308148-002 7439-92-1Lead137645044 Hydromet Sample Background level of analyte not


----Not

Determined


EP1308148-002 7440-66-6Zinc137645044 Hydromet Sample Background level of analyte not


----Not

Determined


EP1308148-002 7782-49-2Selenium137645044 Hydromet Sample Background level of analyte not


----Not

Determined


EP1308148-002 7782-49-2Selenium137645044 Hydromet Sample MS recovery not determined,



----Not

Determined


EP1308148-002 7440-43-9Cadmium137645044 Hydromet Sample Background level of analyte not


----Not

Determined


Matrix: WATER


Matrix Spike (MS) Recoveries

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Matrix: WATER


Matrix Spike (MS) Recoveries - Continued

Total Phosphorus as PEP1308148-003 ----137645044 Treated Waste Water MS recovery not determined,



----Not

Determined


l For all matrices, no Method Blank value outliers occur.

l For all matrices, no Laboratory Control outliers occur.

Regular Sample Surrogates

l For all regular sample matrices, no surrogate recovery outliers occur.

Outliers : Analysis Holding Time Compliance

This report displays Holding Time breaches only. Only the respective Extraction / Preparation and/or Analysis component is/are displayed.

Matrix: SOIL

AnalysisExtraction / Preparation

Date analysedDate extractedContainer / Client Sample ID(s) Days

overdue

Days

overdue

Due for extraction Due for analysis

Method


Clear Plastic Bottle - Natural

15-NOV-2013----137645044 Hydromet Sample 19-NOV-2013---- ---- 4

ED040: Sulfur as SO4 2-

Soil Glass Jar - Unpreserved

----01-NOV-2013137645044 Flotation Tailings - 16.3%, 137645044 Hydromet Sample ----20-NOV-2013 19 ----

ED042T: Total Sulfur by LECO

80* dried soil

----01-NOV-2013137645044 Flotation Tailings - 16.3%, 137645044 Hydromet Sample ----13-NOV-2013 12 ----

EN60: Bottle Leaching Procedure

LabSplit: Leach for organics and other tests

08-NOV-2013----137645044 Flotation Tailings - 16.3%, 137645044 Hydromet Sample 15-NOV-2013---- ---- 7

Matrix: WATER



overdue

Days

overdue


Method



25-OCT-2013----137645044 Flotation Tailings - 16.3% 07-NOV-2013---- ---- 13


25-OCT-2013----137645044 Treated Waste Water 31-OCT-2013---- ---- 6



01-NOV-2013----137645044 Treated Waste Water 04-NOV-2013---- ---- 3

19 of 19:Page

Work Order :

:Client


GOLDER ASSOCIATES


Matrix: WATER



overdue

Days

overdue


Method

ED093F: Dissolved Major Cations - Analysis Holding Time Compliance


01-NOV-2013----137645044 Flotation Tailings - 16.3% 07-NOV-2013---- ---- 6



27-OCT-2013----137645044 Flotation Tailings - 16.3% 06-NOV-2013---- ---- 10

Outliers : Frequency of Quality Control Samples

The following report highlights breaches in the Frequency of Quality Control Samples.

l No Quality Control Sample Frequency Outliers exist.



APPENDIX B Result Tables

Table 1BResults of Geochemical Analysis on Tailings Solids

Northern Minerals Ltd,Browns Range Tailings Operations

137645044-011-R-Rev2-Appendix B Page 1 of 1 SOIL_Chemistry_Output_Table 1B_AT_05062014.xlsm , 12/06/2014

Compiled: JUP Field_ID Flotation Tailings Hydromet SampleChecked: AT SampleCode EP1308148001 EP1308148002Reference: 137645044-011-R-Rev2 Sampled_Date_T 25/10/2013 25/10/2013

Matrix_Type SOLID SOLID

Chem_Group ChemName Unit LOR DoE 1996 CT1/2 Class I/II

DoE 1996 CT 3 Class III

DoE 1996 CT 4 Class IV

Sample Quality Parameters Electrical Conductivity @ 25°C uS/cm 1 646 8240Total Sulfur as S (LECO) % 0.01 <0.01 4.27Sulfur(as SO4) mg/kg 100 130 67,000Moisture (centrifudge product) % 1 44.7 4.5ANC as CaCO3 % CaCO3 0.1 <0.1 0.3ANC as H2SO4 kg H2SO4/t - <0.5 3.0Fizz Rating Fizz Unit 0 0 0NAG (pH 4.5) kg H2SO4/t 0.1 <0.1 <0.1NAG (pH 7.0) kg H2SO4/t 0.1 6.3 1.3NAGpH pH Unit 0.1 6.1 6.3

NAPP Net Acid Production Potential kg H2SO4/t 0.5 <0.5 128Aluminium mg/kg 50 50,000 100,000 200,000 5190 3000Antimony mg/kg 0.1 0.2 2.0Arsenic mg/kg 0.1 14 140 1400 1.9 76.8Barium mg/kg 0.1 50,000 100,000 200,000 62.4 38.6Beryllium mg/kg 0.1 2 20 200 0.2 0.2Bismuth mg/kg 0.1 0.1 2.1Boron mg/kg 50 50,000 100,000 200,000 <50 <50Cadmium mg/kg 0.1 0.4 4 40 <0.1 <0.1Calcium mg/kg 50 540 32400Chromium mg/kg 0.1 10 100 1000 118 725Cobalt mg/kg 0.1 50,000 100,000 200,000 2.3 14.0Copper mg/kg 0.1 50,000 100,000 200,000 43.9 61.3Iron mg/kg 50 41,200 18,200Lead mg/kg 0.1 2 20 200 5.6 37.5Lithium mg/kg 0.1 0.6 2.8Magnesium mg/kg 370 9440Manganese mg/kg 0.1 50,000 100,000 200,000 26.5 23.2Mercury mg/kg 0.1 0.2 2 20 <0.1 <0.1Molybdenum mg/kg 0.1 10 100 1000 16.2 144Nickel mg/kg 0.1 4 40 400 97.8 404Potassium mg/kg 50 1000 510Selenium mg/kg 1 2 20 200 2 363Silver mg/kg 0.1 20 200 2000 <0.1 4.2Sodium mg/kg 50 860 210Strontium mg/kg 0.1 13.7 1770Thallium mg/kg 0.1 <0.1 <0.1Thorium mg/kg 0.1 3 145Tin mg/kg 0.1 2 10.4Uranium mg/kg 0.1 2.3 141Vanadium mg/kg 1 50,000 100,000 200,000 3 2Zinc mg/kg 0.5 50,000 100,000 200,000 10.9 15.1

Legend for highlighted results:Exceeds DoE 1996 CT class 1/2 criteriaExceeds DoE 1996 CT class 3 criteriaExceeds DoE 1996 CT class 4 criteria

NAG Testing

Total Elements

Table 2BTailings Solids Leachate Water Quality

Northern Minerals Ltd, Browns Range Tailings Operations

137645044-011-R-Rev2-Appendix B Page 1 of 1 LEACHATE_Chemistry_Output_Table1__AT05062014.xlsm , 12/06/2014

Compiled: JUP Field ID Flotation Tailings Solid Hydromet SampleChecked: AT SampleCode EP1308148001 EP1308148002Reference: 137645044-011-R-Rev2 Sampled_Date_Time 25/10/2013 25/10/2013

Matrix Type ASLP LEACHATE (20:1) ASLP LEACHATE (20:1)

Chem_Group ChemName Unit LOR DEC ASLP 1/2 class I/II

DEC ASLP 3 class III

DEC ASLP 4 class IV

ANZECC 2000 GW long-term irrigation water

protection

ANZECC 2000 livestock drinking water trigger

value (low risk)

DEC short-term irrigation water

Acidity (as CaCO3) mg/L 1 <1 13Electrical Conductivity @ 25°C uS/cm 1 60 3730pH (Lab) pH_Units 0.01 6-8.5 8.49 7.21pH (Final after leach) pH Units 0.1 9.4 7.4Sodium mg/L 1 115 16 9Potassium mg/L 1 2 16Calcium mg/L 1 1000 <1 604Magnesium mg/L 1 <1 465Chloride mg/L 1 40 0 6 4Sulfur(as SO4) mg/L 1 1000 2 2850Sulfur(as SO4) - Turbidimetric mg/L 1 1000 3 3010Bicarbonate Alkalinity (as CaCO3) mg/L 1 20 <1Carbonate Alkalinity (as CaCO3) mg/L 1 2 <1Hydroxide Alkalinity (as CaCO3) mg/L 1 <1 <1Total Alkalinity (as CaCO3) mg/L 1 21 <1Nitrate (as N) mg/L 0.01 400 0.01 0.03Nitrite (as N) mg/L 0.01 30 <0.01 <0.01Nitrogen (Total Oxidised) mg/L 0.01 0.01 0.03Total Phosphorus (as P) mg/L 0.01 0.05 0 0.55 2.47Sulphur (as S) - Total mg/L 1 <1 950Sulphur (as S) - Leachable mg/L 1 1 916Total Anions meq/L 0.01 0.65 62.8Total Cations meq/L 0.01 0.75 69.2Ionic Balance (Lab) % 0.01 - 4.88Aluminium mg/L 0.01 5 5 20 5.45 0.01Antimony mg/L 0.001 0.001 0.003Arsenic mg/L 0.001 0.5 0.7 7 0.1 0.5 2 0.004 0.066Barium mg/L 0.001 0.622 0.046Beryllium mg/L 0.001 0.1 1 10 0.1 0.5 <0.001 <0.001Bismuth mg/L 0.001 <0.001 <0.001Boron mg/L 0.05 0.5 5 0 0.11 0.7Cerium mg/L 0.001 0.026 <0.001Caesium mg/L 0.001 0.001 0.001Cobalt mg/L 0.001 0.05 1 0.1 0.003 0.021Copper mg/L 0.001 0.2 0.5 5 0.242 0.002Indium mg/L 0.001 <0.001 <0.001Iron mg/L 0.05 0.2 10 4.83 <0.05Lead mg/L 0.001 0.5 1 10 2 0.1 5 0.028 <0.001Lithium mg/L 0.001 2.5 2.5 0.005 0.068Manganese mg/L 0.001 0.2 10 0.098 0.261Mercury mg/L 0.0001 0.01 0.1 1 0.002 <0.0001 - Molybdenum mg/L 0.001 0.5 5 50 0.01 0.15 0.05 0.004 3.2Nickel mg/L 0.001 0.2 2 20 0.2 1 2 0.05 1.02Rubidium mg/L 0.001 0.009 0.036Selenium mg/L 0.01 0.5 1 10 0.02 0.02 0.05 <0.01 <0.01Silicon mg/L 0.05 23.1 13.7Strontium mg/L 0.001 0.044 6.02Thallium mg/L 0.001 <0.001 <0.001Thorium mg/L 0.001 0.007 <0.001Tin mg/L 0.001 0.001 <0.001Titanium mg/L 0.01 <0.01 <0.01Uranium mg/L 0.001 0.01 0.2 0.1 0.005 <0.001Zinc mg/L 0.005 2 20 5 0.115 <0.005

Legend for highlighted results:Exceeds DoE 1996 ASLP class 1/2 criteriaExceeds DoE 1996 ASLP class 3 criteriaExceeds DoE 1996 ASLP class 4 criteriaExceeds ANZECC 2000 GW long-term irrigation water protection criteriaExceeds ANZECC 2000 livestock dringing water trigger vlaue (low risk) criteriaExceeds DEC short-term irrigation water criteria

Dissolved Elements

Sample Quality Parameters including

Major Ions

Table 3BAnalytical Results on Waters

Tailings Process Water and Treated Waste Water Quality

Northern Minerals Ltd,Browns Range Tailings Operations

137645044-011-R-Rev2-Appendix B Page 1 of 1 WATER_Chemistry_Output_Table3B_AT_05062014.xlsm , 12/06/2014

Compiled: JUP Field ID Flotation Tailings Treated Waste WaterChecked: AT SampleCode EP1308148004 EP1308148003Reference: 137645044-011-R-Rev2 Sampled Date Time 25/10/2013 25/10/2013

Matrix Type PROCESS WATER WATER

Chem_Group ChemName Unit LORDoE 1996

ASLP class 1/2

DoE 1996 ASLP class 3

DoE 1996 ASLP class 4

ANZECC 2000 GW long-term irrigation water

protection

ANZECC 2000 Livestock drinking water trigger value

(low risk)

DEC short-term irrigation water

Acidity (as CaCO3) mg/L 1 57 19Electrical Conductivity @ 25°C uS/cm 1 1230 13,500pH (Lab) pH Units 0.01 6-8.5 8.07 7.66Chloride mg/L 1 40 0 215 169Sulfur(as SO4) (dissolved) mg/L 1 1000 68 13,800Sulfur(as SO4) Turbidimetric mg/L 1 1000 72 14,300Bicarbonate Alkalinity (as CaCO3) mg/L 1 248 101Carbonate Alkalinity (as CaCO3) mg/L 1 <1 <1Hydroxide Alkalinity (as CaCO3) mg/L 1 <1 <1Total Alkalinity (as CaCO3) mg/L 1 248 101Nitrate (as N) mg/L 0.01 400 <0.01 0.22Nitrite (as N) mg/L 0.01 30 <0.01 <0.01Nitrogen (Total Oxidised) mg/L 0.01 <0.01 0.22Total Phosphorus (as P) mg/L 0.01 0.05 0 1.45 5.94Sulphur (as S) (dissolved) mg/L 1 22 4590Silica (SiO2) mg/L 0.1 162 9.3Total Anions meq/L 0.01 12.5 296Total Cations meq/L 0.01 12 325Ionic Balance (Lab) % 0.01 2.19 4.66Aluminium mg/L 0.01 5 5 20 2.38 0.03Antimony mg/L 0.001 0.002 <0.001Arsenic mg/L 0.001 0.5 0.7 7 0.1 0.5 2 0.012 0.164Barium mg/L 0.001 0.374 0.008Beryllium mg/L 0.001 0.1 1 10 0.1 0.5 <0.001 <0.001Bismuth mg/L 0.001 <0.001 <0.001Boron mg/L 0.05 0.5 5 0 0.13 1.2Cadmium mg/L 0.0001 0.1 0.2 2 0.0001 0.0003Caesium mg/L 0.001 <0.001 0.01Calcium mg/L 1 1000 4 511Cerium mg/L 0.001 0.039 <0.001Chromium * mg/L 0.001 0.018 0.038Cobalt mg/L 0.001 0.05 1 0.1 0.005 0.008Copper mg/L 0.001 0.2 0.5 5 0.334 0.012Dysprosium mg/L 0.001 0.053 <0.001Erbium mg/L 0.001 0.031 <0.001Europium mg/L 0.001 <0.001 <0.001Gadolinium mg/L 0.001 0.035 <0.001Gallium mg/L 0.001 <0.001 <0.001Hafnium mg/L 0.01 <0.01 <0.01Holmium mg/L 0.001 0.011 <0.001Indium mg/L 0.001 <0.001 <0.001Iron mg/L 0.05 0.2 10 3.2 <0.05Lanthanum mg/L 0.001 0.02 <0.001Lead mg/L 0.001 0.5 1 10 2 0.1 5 0.03 <0.001Lithium mg/L 0.001 2.5 2.5 0.011 0.992Lutetium mg/L 0.001 0.004 <0.001Magnesium mg/L 1 3 3460Manganese mg/L 0.001 0.2 10 0.433 0.192Molybdenum mg/L 0.001 0.5 5 50 0.01 0.15 0.05 0.061 0.092Neodymium mg/L 0.001 0.058 <0.001Nickel mg/L 0.001 0.2 2 20 0.2 1 2 0.071 0.212Potassium mg/L 1 16 211Praseodymium mg/L 0.001 0.01 <0.001Rubidium mg/L 0.001 0.005 0.379Samarium mg/L 0.001 0.019 <0.001Selenium mg/L 0.01 0.5 1 10 0.02 0.02 0.05 <0.01 <0.01Silicon mg/L 0.05 75.8 4.36Silver mg/L 0.001 1 10 100 <0.001 <0.001Sodium mg/L 1 115 256 221Strontium mg/L 0.001 0.094 2.65Tellurium mg/L 0.005 <0.005 <0.005Terbium mg/L 0.001 0.008 <0.001Thallium mg/L 0.001 <0.001 <0.001Thorium mg/L 0.001 0.002 <0.001Thulium mg/L 0.001 0.004 <0.001Tin mg/L 0.001 0.002 <0.001Titanium mg/L 0.01 0.02 0.01Uranium mg/L 0.001 0.01 0.2 0.1 0.007 <0.001Vanadium mg/L 0.01 <0.01 0.06Yttrium mg/L 0.001 0.238 <0.001Ytterbium mg/L 0.001 0.024 <0.001Zinc mg/L 0.005 2 20 5 0.104 0.006Zirconium mg/L 0.005 <0.005 <0.005

*DoE 1996 ASLP guideline value for hexavalent chromium Legend for highlighted results:Exceeds DoE 1996 ASLP Class 1/2 CriteriaExceeds DoE 1996 ASLP Class 3 CriteriaExceeds DoE 1996 ASLP Class 4 CriteriaExceeds ANZECC 2000 GW long-term irrigation water protection criteriaExceeds ANZECC 2000 livestock dringing water trigger vlaue (low risk) criteriaExceeds DEC short-term irrigation water criteria

Sample Quality Parameters

Dissolved Elements



APPENDIX C AMIRA (2002) Classification Flow Chart

AMIRA P387A Project ARD Test Handbook

Ian Wark Research Institute Page A- 1 Environmental Geochemistry International Pty Ltd

Figure A1: Flow Chart showing ARD screening tests, decision nodes and ARD rock type categories

Tailings or Waste Rock

Sample

Crushing and Splitting

(see Note 1)

Pulverise to -75µm

Total S

ANC Test

Single Addition NAG Test

NAPP Calculation

Sample Preparation Basic Screening Tools

pH1:2 and EC1:2

(see Note 2)

Categorise Sample

NAF(see Note 4)

Uncertain

Note 6: Further investigations are required to determine:-Classification of samples with conflicting NAPP and NAG results.-Magnitude of acid forming capacity for PAF samples with low NAG/NAPP ratios.-Availability of ANC for neutralisation of acid produced in samples with moderate to high S.-Acid potential of samples with high contents of organic matter.

NAPP positive

PAF Low Capacity

(see Note 5)

Uncertain

No

NAGpH less than

4.5

Yes

Further Investigation

and Re-Categorisation(see Note 6)

Yes

NAGpH less than

4.5

Yes

No

Note 2: pH and EC measurements provide a measure of immediately available acidity and salinity. This information may influence the final categorisation of the sample due to potential short term effects of a given material on rehabilitation, drainage etc. Measurements are best carried out on the crushed sample rather than the pulverised sample where possible.

PAF

Data Evaluation

Carbonaceous Sample

(see Note 3)

Note 3: The occurrence of organic compounds in some materials may interfere with NAG tests. In particular samples from coal deposits with more than about 5% TOC.

Note 4: Further evaluation is recommended to confirm classification on samples with High Sulphur and High ANC. There is a risk of incomplete sulphide oxidation during the NAG test on high sulphur samples Selected samples of High S and High ANC material should be subjected to Sequential NAG and ABCC determinations. Samples with more than 2% S and ANC/MPA ratios less than 1.5 should be evaluated.

NoNAG4.5

greaterthan 5

Yes

YesNo

No

Note 1: Sample preparation may include crushing to nominal -4mm and splitting of a representative sub sample from the bulk. Core and rock samples require crushing before splitting. Drill chips and tailings do not normally require crushing.

Note 5: Further investigation is recommended to determine acid forming capacities of samples with high S values(>1%S) and low NAG/NAPP ratios (<0.5). Low NAG/NAPP ratios indicate either non-acid producing S forms or incomplete oxidation in the NAG test, and additional testing would be required to determine which applies in a particular case.



APPENDIX D Limitations

LIMITATIONS

This Document has been provided by Golder Associates Pty Ltd (“Golder”) subject to the following limitations: This Document has been prepared for the particular purpose outlined in Golder’s proposal and no responsibility is accepted for the use of this Document, in whole or in part, in other contexts or for any other purpose. The scope and the period of Golder’s Services are as described in Golder’s proposal, and are subject to restrictions and limitations. Golder did not perform a complete assessment of all possible conditions or circumstances that may exist at the site referenced in the Document. If a service is not expressly indicated, do not assume it has been provided. If a matter is not addressed, do not assume that any determination has been made by Golder in regards to it. Conditions may exist which were undetectable given the limited nature of the enquiry Golder was retained to undertake with respect to the site. Variations in conditions may occur between investigatory locations, and there may be special conditions pertaining to the site which have not been revealed by the investigation and which have not therefore been taken into account in the Document. Accordingly, additional studies and actions may be required. In addition, it is recognised that the passage of time affects the information and assessment provided in this Document. Golder’s opinions are based upon information that existed at the time of the production of the Document. It is understood that the Services provided allowed Golder to form no more than an opinion of the actual conditions of the site at the time the site was visited and cannot be used to assess the effect of any subsequent changes in the quality of the site, or its surroundings, or any laws or regulations. Any assessments made in this Document are based on the conditions indicated from published sources and the investigation described. No warranty is included, either express or implied, that the actual conditions will conform exactly to the assessments contained in this Document. Where data supplied by the client or other external sources, including previous site investigation data, have been used, it has been assumed that the information is correct unless otherwise stated. No responsibility is accepted by Golder for incomplete or inaccurate data supplied by others. Golder may have retained subconsultants affiliated with Golder to provide Services for the benefit of Golder. To the maximum extent allowed by law, the Client acknowledges and agrees it will not have any direct legal recourse to, and waives any claim, demand, or cause of action against, Golder’s affiliated companies, and their employees, officers and directors. This Document is provided for sole use by the Client and is confidential to it and its professional advisers. No responsibility whatsoever for the contents of this Document will be accepted to any person other than the Client. Any use which a third party makes of this Document, or any reliance on or decisions to be made based on it, is the responsibility of such third parties. Golder accepts no responsibility for damages, if any, suffered by any third party as a result of decisions made or actions based on this Document.

GOLDER ASSOCIATES PTY LTD GAP Form No. LEG 04 RL 1

Golder Associates Pty Ltd Level 3, 1 Havelock Street West Perth, Western Australia 6005 Australia T: +61 8 9213 7600

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