GRAEME CAMPBELL & ASSOCIATES PTY LTD Specialists in … · 2021. 1. 4. · Graeme Campbell &...

Graeme Campbell & Associates Pty Ltd

GRAEME CAMPBELL & ASSOCIATES PTY LTD

Specialists in Materials Characterisation Integrated Geochemical and Physical Testing Service for Bedrocks, Regoliths and Soils

of Diverse Lithological, Alteration and Weathering Assemblages

P.O. Box 247, Bridgetown, Western Australia 6255 Phone: (61 8) 9761 2829 E-mail: [email protected]

ACN 061 827 674 ABN 37 061 827 674

Testing Laboratory: Unit B, 15 Rose Street, Bridgetown, WA 6255 1907/2 COMPANY: Calidus Resources Limited ATTENTION: Paul Brennan FROM: Graeme Campbell SUBJECT: Warrawoona Gold Project: Geochemical

Characterisation of Tailings-Slurry Sample and Implications for Tailings Management

NO. PAGES (including this page): 65 DATE: 18th September 2019 Paul, The testwork results obtained in this study are presented in Tables 1-5, and shown on Figure 1. Photographs of the tailings-slurry sample received for testing, and various testing procedures, are shown on Plates 1-4. Details of the metallurgical testwork programme employed to generate the tailings-slurry sample, are presented in Attachment I. Copies of the laboratory reports are presented in Attachment II. In addition to this study on process-tailings geochemistry, the characterisation of mine-waste and ore samples for the Project forms the subject of the following report:

• Graeme Campbell and Associates Pty Ltd, 2019, "Warrawoona Gold Project: Characterisation of Mine-Waste & Ore Samples (Klondyke and Copenhagen Pits) – Implications for Mining-Stream Management", unpublished report prepared for Calidus Resources Limited


2

1.0 TESTWORK OUTCOMES FOR TAILINGS-SLURRY SAMPLE 1.1 Tailings-Solids 1.1.1 Acid-Base Chemistry The tailings-solids sample is classified as Non-Acid Forming (NAF), and reflects 'trace/accessory-sulphides' [Cr(II)-Reducible-S value of 0.93-0.95 %] in a gangue that is strongly calcareous ("CaCO3-equivalent" content of ca. 25 %) [Table 1]. In terms of the intrinsic sulphide-mineral (chiefly pyrite) reactivity, determination of the Oxygen-Consumption Rate (OCR) resulted in an OCR30oC value of 2.29E-11 kg O2/kg/s. Given the occurrence of 'trace/accessory-pyrite', a reaction temperature of 30 oC, and a circum-neutral-pH, this OCR value indicates a sluggish-to-moderate reactivity (i.e. the pyrite is not hyper-reactive). The pH-buffering curve (Figure 1) indicates that the carbonate-mineral suite in the gangue includes ferroan forms (e.g. ankerites). 1.1.2 Multi-Element Composition and Mineralogy The tailings-solids sample was characterised by major/minor-element contents below, or close to, those typically recorded for soils, regoliths and bedrocks derived from non-mineralised terrain (Table 2). The sample was moderately enriched in As (viz. As content of 325 mg/kg.1 The tailings-solids sample comprised mostly ankerites and quartz with subordinate chlorites and muscovites (Table 3). Pyrite was an accessory component, together with plagioclases, siderites and goethites. In the mineralogical study, isolated grains of arsenopyrite, chalcopyrite and sphalerite were also identified; no gersdorffite was identified. 1.2 Tailings-Slurry-Water 1.2.1 General Chemistry The tailings-slurry-water sample was neutral-to-alkaline (pH 8), and brackish with a TDS-(grav.) value of 5,600 mg/L (Table 4).2 The SO4-rich state of the tailings-slurry-water reflects the use of Caro's acid (i.e. mixture of H2O2 and H2SO4 for the cyanide-detoxification treatment) [Attachment I]. The Ca and SO4 concentrations are consistent with saturation with respect to gypsum. 1 The As content of 325 mg/kg lies towards the 'low-end-of-the-range' for tailings-solids typically produced at WA gold-mines (Campbell, unpublished results, since the late-1980s). 2 TDS-(grav.) = Total-Dissolved-Solids-(gravimetric).


3

1.2.2 Cyanide Forms The tailings-slurry-water sample had (Table 4):

• a Total-Cyanide (CNTot.) concentration of 5.4-5.5 mg/L • a Weak-Acid-Dissociable-Cyanide (CNWAD) concentration of 3.8-3.9

mg/L • a Free-Cyanide (CNFree) concentrations of 1.00 mg/L

The above concentrations of residual forms of cyanide reflect the cyanide-destruction treatment carried out using Caro's acid. The NH3 concentration of 45 mg/L reflects incomplete transformation of cyanide-nitrogen to nitrate-nitrogen during the bench-scale metallurgical testwork programme. 1.2.3 Minor-Elements The tailings-slurry-water sample was characterised by (Table 4):

(a) Cu and Ni concentrations of 1.0 mg/L and 2.0 mg/L, respectively (b) Cr and Cr(VI) concentrations of 150 µg/L and 24-25 µg/L, respectively (c) an As concentration of 240-245 µg/L

(d) concentrations of other minor-elements either below, or near, the

respective-detection limits (e.g. 1-10 µg/L)

The Cu and Ni concentrations likely reflect complexation by the NH3(aq) indicated above. The majority of the Cr occurs as Cr(III), and likely chiefly reflects complexation by NH3(aq). The Cr(VI) is expected to arise from oxidation by H2O2 during treatment with Caro's acid in the metallurgical study. 2.0 WEATHERING TESTING OF TAILINGS-SOLIDS SAMPLE Following determination of the Oxygen-Consumption Rate (OCR) above, the tailings-solids sample was placed in a small column, and subjected to humidity-cell testing at 30 oC. The testing methodology is based on Option B in ASTM D5744-13 (viz. no forced-air flow through / over the sample-bed during weathering). The moisture content of the tailings-solids was within the range 8-12 % (w/w) during weathering. Further details of the humidity-cell testing are presented in the footnote to Table 5. Initial pre-rinsing was undertaken with high-purity deionised-water (HPDW). The leachate-analysis results for the pre-rinsing treatment, and for the first two weeks of weathering, are presented in Table 5. The leachates were neutral-to-alkaline (pH 7-8), and had minor-element concentrations typically below, or close to, the respective detection-limits (1 µg/L generally).


4

The exception was As with leachate-As concentrations of 240-390 µg/L interpreted as chiefly reflecting solubility control by Fe/Ca-arsenates associated with the weathering of 'trace-arsenopyrite'.3 2.0 IMPLICATIONS FOR TAILINGS MANAGEMENT Based on the testwork results obtained in this study, it is concluded that the tailings in the tailings-storage facility (TSF) should be classified as NAF, reflective of 'trace/accessory-sulphides' (chiefly pyrite) in a gangue that is strongly calcareous (mostly ankerites). A modest enrichment in As should occur, and chiefly associated with arsenopyrite that is sub-ordinate to pyrite. Secondary Fe/Ca-arsenates formed during weathering should constrain tailings-pore-fluid-As concentrations to within the sub-mg/L range. When the TSF is decommissioned, direct revegetation of the tailings-bed surface may be a practical and cost-effective option for rehabilitation, through investigations would be required to confirm (or refine) this decommissioning option. The precise chemistry of the tailings-slurry-water reporting to the TSF will be closely dependent on the conditions employed for the cyanide-detoxification treatment (e.g. Caro's acid, and alternatives) in the full-scale milling operation. It is understood that cyanide-detoxification treatment is to be refined via further metallurgical investigations as the Project moves forward. I trust the above is useful to you. Regards, Dr GD Campbell Director encl. Tables 1-5 Figure 1 Plates 1-4 Attachments I-II

3 Leachate-As concentrations within the range 100-1,000 µg/L are generally recorded in the kinetic testing for the circum-neutral weathering of tailings-solids from WA gold mines where arsenopyrite (and arsenian-pyrite occur as trace components (Campbell, unpublished results since the 1990s).


TABLES

Table 1: Acid-Base-Analysis Results for Tailings-Solids Sample

GCA- CARB.- BULK-SAMPLE TOTAL-S CRS TOTAL-C CO3-C ANC ANC AFP

NO. (%) HCl Na2CO3 (%) (%) (%) (calc'd) CATEGORY

GCA11916 1.04 (1.05) 0.03 (0.03) <0.01 (<0.01) 0.93 (0.95) 4.14 (4.19) 4.11 (4.15) 336 268 (270) NAF

Notes:CRS = Cr(II)-Reducible-S; ANC = Acid-Neutralisation Capacity; NAG = Net-Acid Generation; AFP = Acid-Formation PotentialNAF = Non-Acid FormingValues in parentheses represent duplicate determinations

Calculated Carbonate-ANC value assume that all CO3-C is associated with Ca/Mg-carbonates (i.e. 'non-ferroan-carbonates'). Ankerite is the predominent carbonate in the tailings-solids with subordinate siderite (Table 3).The measured Bulk-ANC value of ca. 80 % of the calculated Carbonate-ANC value is therefore consistent with the speciation of the carbonate-mineral suite.

Pyrite is the exlusive sulphide-mineral present in material abundance, since only isolated grains of other sulphides (viz.arsenopyrite, chalcopyrite and sphalerite) were identified in the mineralogical study (Table 3).

SO4-S (%) BY VARIOUSEXTRACTION METHODS

kg H2SO4/tonne

Table 2: Multi-Element-Analysis Results for Tailings-Solids Sample

S Ca Mg K Na Al Fe Ti Si As Sb Se Mo B F

1.05 6.1 4.0 1.3 0.86 4.5 6.4 0.15 22.5 325 1.4 0.24 10 90 172

1.5 0.2 0.05 1.5 10 950

Cu Zn Cd Pb Hg Ni Cr Co Mn Ag Bi P Sr Ba Sn V Tl Th U

110 100 0.4 8 <0.01 208 516 34 1,200 0.3 <0.1 240 75 58 1.1 190 0.3 0.38 0.12

50 75 0.11 14 0.05 80 100 20 950 0.07 0.05 1,000 370 500 2.2 160 0.6 12 2.4

signifies element content 10-100 times average-crustal abundancesignifies element content 100+ times average-crustal abundance

Reference: Bowen HJM, 1979, "Environmental Chemistry of the Elements", Academic Press, New York

mg/kg%

Average-Crustal Abundance (Bowen 1979)

mg/kg

Average-Crustal Abundance (Bowen 1979)

SAMPLE_ID

GCA11916

SAMPLE_ID

GCA11916

Table 3: Mineralogical Results for Tailings-Solids Sample

Notes:• major = 20-50 %; minor = 10-20 %; accessory = 1-10 %; trace = less than 1 %# signifies that arsenopyite, chalcopyrite and sphalerite essentially correspond to isolated grains,since Total-As = 0.034 %, Total-Cu = 0.011 %, and Total-Zn = 0.010 %.

Ti-oxidesilmenite

< 1 %

plagioclase1-10 %pyrite

20-50 %ankeritequartz

10-20 %chloritemuscovite

GCA11916

sphalerite#chalcopyrite#arsenopyrite#

goethitesiderite

hematite

Table 4: Analysis Results for Tailings-Slurry-Water Sample

ELEMENT/ Detoxed- ELEMENT/ Detoxed-PARAMETER Tailings PARAMETER Tailings

(GCA11916) (GCA11916)

Major-Parameters Minor-Ions (µg/L)

pH 8.0 As 240 [244, 245]pH (GCA) 7.7 Sb 34 [40.0, 40.1]

EC (µS/cm) 6,600 Se 12 [15,16]EC (GCA, µS/cm) 6,800 B 270

TDS-(grav.) 5,600 Mo 63

Major-Ions (mg/L) Mn 140Al 23

Na 280 Cd 0.1K 1,500 Pb <1

Mg 150 Cr 150Ca 330 Cr(VI) 25 (24)Cl 160 Bi <1

SO4 3,300 P <50HCO3 (as CaCO3) 110 Ba 200CO3 (as CaCO3) <1 Sr 3

F 0.3 [0.3, 0.3] Tl <1Si 4.0 V <1

reactive-Si 3.2 Sn <1U 2

Nitrogen-Forms (mg/L) Th <1

NH3-N 45 Cyanide-Complexing Metals (mg/L)NO3-N 3.2

Fe 0.28Cyanide Forms (mg/L) Cu 1.0

Zn <0.005CNtot [5.5, 5.4] Ni 2.0

CNwad [3.8, 3.9] Co 0.64CNfree [1.00, 1.00] Ag 0.027

SCN 1.8 [2.78, 2.76] Hg <0.00005

Notes:EC = Electrical-Conductivity; TDS-(grav.) = Total-Dissolved-Solids-(gravimetric).CNtot = Total-Cyanide; CNwad = Weak-Acid-Dissociable-Cyanide; CNfree = Free-Cyanide; SCN = thiocyanate

Values in brown-type and within square-parentheses are assays by GLS (Maddington).All other values, apart from pH and EC values by GCA, are assays by SGS (Perth Airport).

Table 5: Leachate-Analysis Results for Humidity-Cell Testing of Tailings-Solids Sample

WEEKS OFPARAMETER / ELEMENT WEATHERING @

30 oC'Week-0a' 'Week-0b' 2

pH, Salinity & AlkalinitypH 7.9 7.7 8.1

pH (GCA) 7.8 8.0 7.9EC (µS/cm) 2,800 530 290

EC (GCA, µS/cm) 2,800 560 405 HCO3 (mg/L CaCO3) 100 83 110

Major-Ion Chemistry Ca (mg/L) 87 40 10.0Mg (mg/L) 84 33 7.3K (mg/L) 41 22 47Na (mg/L) 130 3.1 4.0Cl (mg/L) 110 28 5

SO4 (mg/L) 1,200 180 41F (mg/L) 0.3 0.2 0.3Al (mg/L) 0.04 0.03 0.03Fe (mg/L) 0.03 0.03 <0.01Si (mg/L) 2.1 2.3 1.9

Minor-Element Chemistry As (µg/L) 340 240 390 Sb (µg/L) 17 10 14B (µg/L) 220 210 200

Mo (µg/L) 27 12 4.0Se (µg/L) 6 <1 <1P (µg/L) <50 <50 <50

Cu (µg/L) 12 5 3Zn (µg/L) 9 <5 <5Cd (µg/L) <0.1 <0.1 <0.1Pb (µg/L) <1 <1 <1Ni (µg/L) 43 10 7Cr (µg/L) <1 <1 <1Co (µg/L) 260 21 13Hg (µg/L) <0.05 <0.05 <0.05Mn (µg/L) 40 18 4Sn (µg/L) <1 <1 <1Ag (µg/L) <1 7 <1Ba (µg/L) 110 8.5 5.4Sr (µg/L) 720 200 57Bi (µg/L) <1 <1 <1Tl (µg/L) <1 <1 <1Th (µg/L) <1 <1 <1U (µg/L) <1 <1 <1V (µg/L) 1 <1 1

Leachate Wt (kg) 0.31 0.52 0.41Note:EC = Electrical-Conductivity.0.75 kg (dry-solids equivalent) of tailings-solids flushed with 0.50 kg high-purity-deionised-water (HPDW).Tailings-solids sample was that employed in the initial determination of Oxygen-Consumption Rate (OCR).Moisture content during humidity-cell weathering within ca. 8-12 % (w/w) range.

PRE-RINSE CYCLES


FIGURE

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

9.0

10.0

11.0

12.0

13.0

14.0

0 50 100 150 200 250 300

Figure 1

pH-Buffering Curves for Tailings-Solids Sample

GCA11916, 'non-pulped', -150 µm nominalGCA11916, pulped, -75 µm nominal

pH

Acid-Addition (kg H2SO4/tonne)


PLATES


PLATE 1: Tailings-Slurry Sample (GCA11916) 'As-Received' at GCA Testing

Laboratory (Bridgetown). PLATE 2: "3D-sector" of tailings-solids removed from plastic drum, and then

passed through 4.75 mm sieve to produce a homogenised mass of moist tailings-solids for testing.


PLATE 3: Acid-Neutralisation-Capacity (ANC) testing of tailings-solids. PLATE 4: Oxygen-Consumption Cell (OCC) housed in an incubator at 30.0 (+/- 0.1)

oC for initial testing of intrinsic sulphide-mineral reactivity vie measurement of O2-Consumption Rate (OCR). Moisture content of tailings-solids sample around 3-4 % (w/w).


ATTACHMENT I

DETAILS OF METALLURGICAL TESTWORK STUDY

MEMORANDUM

GR ENGINEERING SERVICES LIMITED ABN 12 121 542 738

Tel: +61 8 6272 6000 Fax: +61 8 6272 6001 Email: [email protected] Website: www.gres.com.au PO Box 258, Belmont WA 6984 71 Daly Street, Ascot WA 6104

Reference: 12556 2312053:P:mr

Attention: Fernando Moutinho; Paul Brennan

Copy to: Andrew Strickland

From: Mark Roberts

Date: 23rd May 2019

Subject: Tailings Testwork Note

INTRODUCTION 1.

The Warrawoona deposit is located near Marble Bar in Western Australia. The project will consist of processing two distinct ore bodies, Klondyke and Copenhagen. Klondyke is a free milling gold deposit that will be processed at 1.5 Mtpa through a primary crusher followed by single stage SAG comminution circuit with a target P80 of 150 microns. Material from the comminution will be fed into a hybrid CIL circuit with 24 hours residence time. CIL tailings are then thickener where the overflow is re-used as process water and the underflow is subjected to cyanide destruction to 20 ppm WAD CN prior to deposition in a down-valley style tailings storage facility. Any water collected from the TSF is returned to the tailings thickener and into the process water tank. The Copenhagen deposit is a sulphide deposit that will be processed via a two-stage crush and ball mill circuit at a rate of 0.1 Mtpa. The grinding circuit product, with a P80 of 106 microns, will be subjected to a 3 stage flotation circuit where approximately 5% will be pulled out as concentrate. The remaining tailings will be transferred into the main plant tailings hopper and deposited in the same down valley TSF.

SAMPLE SELECTION AND LABOROTORY PROCESS 2.

The sample supplied for tailings chemistry analysis is a weighted composite of 90% of the main deposit (Klondyke) and 10% of the sulphide deposit (Copenhagen), which is in-line with the planned mining schedule. The Klondyke sample is a composite across the main deposit as shown by the pink dots in Figure 1. The Copenhagen sample was collected from rock-chips spoils from the RC drilling and combined to represent a LOM composite.

mailto:[email protected]

http://www.gres.com.au/

Reference: 12556 2312053:P:mr Page 2

Sample Locations from the Klondyke Deposit Figure 1

The samples provided to complete the tailings chemistry have been subjected to the laboratory testwork program as per figure 2. The leaching and flotation was completed at the Nagrom Laboratory Facility and the cyanide destruction testwork was completed by ALS Balcatta. The sample sent for tailings chemistry testwork is in slurry form at approximately 65% solids post cyanide destruction, which is what is expected to report to the TSF.

Laboratory Testwork Flowsheet Figure 2


ATTACHMENT I

LABORATORY REPORTS

GraemeCampbellandAssoc, 3-7-2019POBox249BridgetownWA6255Ourreference24396Mineralogyofonerockpowder(GCA11916)RTownend

2

RESULTSPOLISHEDSECTION/XRD/SEMGCA 11916Quartz MajorMuscovite MinorChlorite MinorPlagioclase AccessoryPyrite AccessoryArsenopyrite TraceSphalerite TraceChalcopyrite TraceIlmenite TraceHematite TraceGoethite AccessoryTioxides TraceSiderite AccessoryAnkerite MajorSEMANALYSES(CARBONATES)Wt% MgSiderite Siderite Ankerite AnkeriteCaO <1 <1 30.2 30.8MgO 17.6 1 12.3 13.2MnO <1 <1 <1 <1FeO 36.8 58.2 12.3 11.4

2

TEST REPORTMINERALS

TESTED BY

Accredited for compliance with ISO/IEC 17025.Company Accreditation Number 3244

Intertek15 Davison Street, Maddington 6109, Western AustraliaPO Box 144, Gosnells 6990, Western AustraliaTel: +61 8 9251 8100Email: [email protected]

APPROVED SIGNATURE FOR

Craig RITCHIEOperations Manager - Perth

JOB INFORMATION

CLIENT

REPORT NOTES

GRAEME CAMPBELLCAMPBELL, GRAEME and ASSOCIATESPO Box 247BRIDGETOWN, W.A. 6255AUSTRALIA

NO. ELEMENTS :CLIENT ORDER NO.SAMPLE SUBMISSION NO.PROJECT

:::: VariousSAMPLE TYPE

JOB CODE : 143.0/1908222NO. SAMPLES : 1

DATE RECEIVED :DATE TESTED :DATE REPORTED :DATE PRINTED :

12GCA1907/2 (Job 1 of 1)

WARRAWOONA

29/05/201905/06/2019 - 21/06/201924/06/201924/06/2019

This report relates specifically to the sample(s) tested that were drawn and/or provided by the client or their nominated third party to Intertek. The reportedresult(s) provide no warranty or verification on the sample(s) representing any specific goods and/or shipment. This report was prepared solely for the use of theclient named in this report. Intertek accepts no responsibility for any loss, damage or liability suffered by a third party as a result of any reliance upon or use ofthis report. The results provided are not intended for commercial settlement purposes.Except where explicitly agreed in writing, all work and services performed by Intertek is subject to our standard Terms and Conditions which can be obtained atour website: intertek.com/terms/

Page 1 of 6CLIENT REF :JOB NO : 143.0/1908222

GCA1907/2

2

Company Accreditation Number 3244Analysing Laboratory: Intertek Genalysis Perth

NOTESNATA ENDORSED DOCUMENT

The contents of this report have been prepared in accordance with the terms of NATA accreditation and as suchshould only be reproduced in full.The analysis results reported herein have been obtained using the following methods and conditions:

Project:WarrawoonaThe sample as listed was received as a damp tailings solid.The tailings solid was dried at 45C

The results have been determined according to Genalysis methods codes :Digestions : MPL_W002 (4A/), MPL_W005 (SE1/), ENV_W012 (FC7/SIE) andMPL_W008 (HG1/

Analytical Finishes: ICP_W003 (/MS) ICP_W004 (OE) and AAS_W004 (/CV)

1.Total-C and Total-S were determined using an induction furnaceThe samples are ignited in oxygen ~1700°C and the CO2 and SO2 measured by infrared detectorsGenalysis method code MPL_W043.

2.C-Acinsol (acid insoluble carbon) by a C&S analyser after removal of carbonatesand soluble organic carbon using hot hydrochloric acidGenalysis method code MPL_W046

3. S-SO4 was determined on the pulps by precipitation of BaSO4 after digestion with Na2CO3Genalysis method code ENV_W039,(S72/GR)and by HCl digestion followed by determination of S in solution by OES.Genalysis method codes: MPL_W045(S71/OE) and ICP_W004

The results included the assay of blanks and international reference standard: PD-1, AMIS0343, AMIS0420, DS-1 and GTS-2aGenalysis in house standard:TOC-1b, OREAS 97.01,S_SO4_A2 and S_SO4_B2

The results are expressed as parts per million or percent by mass in the dried andprepared material.

Intertek Genalysis signatoryAnn Patricia EVERSChief Chemist

Date: 22-Jun-2019



GCA1907/2

1

SIGNIFICANT FIGURES

SNR*

DTFIS

= Sample Not Received= Result Checked= Result still to come

UA = Unable to Assay> = Value beyond Limit of Method

= Extra Sample Received Not Listed

X = Less than Detection Limit = Not AnalysedNA

SAMPLE STORAGE

LEGEND

All solid samples (assay pulps, bulk pulps and residues will be stored for 60 days without charge. Following this samples will bestored at a daily rate until clients written advice regarding return, collection or disposal is received. If storage information is notsupplied on the submission, or arranged with the laboratory in writing the default will be to store the samples with theapplicable charges. Storage is charged at $4.00 per m3 per day, expenses related to the return or disposal of samples will becharged at cost. Current disposal cost is charged at $150.00 per m3.

Samples received as liquids, waters or solutions will be held for 60 days free of charge then disposed of, unless written advice forreturn or collection is received.

It is common practice to report data derived from analytical instrumentation to a maximum of two or three significant figures.Some data reported herein may show more figures than this. The reporting of more than two or three figures in no way impliesthat figures beyond the least significant digit have significance.For more information on the uncertainty on individual reported values, please contact the laboratory.

= Insufficient Sample for Analysis+

CLIENT REF :JOB NO : 143.0/1908222

GCA1907/2Page 3 of 6

The results provided are not intended for commercialsettlement purposes

As CELEMENTS C-Acinsol C-CO3 Cr F Hg Ni S S-SO4ppm %UNITS % % ppm ppm ppm ppm % %

0.5 0.01DETECTION LIMIT 0.01 0.01 5 50 0.01 1 0.01 0.014A/DIGEST C71/ 4A/ FC7/ HG1/ 4A/ S71/MS /CSAANALYTICAL FINISH CSA /CALC OE SIE CV OE /CSA OE

SAMPLE NUMBERS316.4 4.190001 GCA11916 0.04 4.15 468 167 X 208 1.05 0.03

CHECKS324.9 4.140001 GCA11916 0.03 4.11 516 172 0.01 207 1.04 0.03

STANDARDS3.210001 DS-1 2.71

0002 TOC-1b 1.430003 PD-1 4.170004 AMIS0343 22770005 OREAS 97.010006 GTS-2a 0.27

645.90007 AMIS0420 74 1210008 PD-1

BLANKSX X0001 Control Blank X X X X X X X

The results provided are not intended forcommercial settlement purposes

JOB NO : 143.0/1908222CLIENT REF : GCA1907/2

Part 1/2

Page 4 of 6

S-SO4 SbELEMENTS Se% ppmUNITS ppm

0.01 0.05DETECTION LIMIT 0.01S72/ 4A/DIGEST SE1/

GR MSANALYTICAL FINISH MSSAMPLE NUMBERS

X 1.170001 GCA11916 0.20

CHECKSX 1.180001 GCA11916 0.24

STANDARDS0001 DS-10002 TOC-1b0003 PD-10004 AMIS03430005 OREAS 97.01 0.630006 GTS-2a

34.610007 AMIS04204.240008 PD-1

BLANKSX X0001 Control Blank X



Part 2/2

Page 5 of 6

METHOD CODE DESCRIPTION

Method Code NATA Scope of AccreditationAnalysing LaboratoryNATA Laboratory AccreditationDate Tested

No digestion or other pre-treatment undertaken. Results Determined by calculationfrom other reported data.

/CALC Intertek Genalysis Perth21/06/19 15:18 3244 3237

Induction Furnace Analysed by Infrared Spectrometry

/CSA MPL_W043, CSA : MPL_W043Intertek Genalysis Perth21/06/19 15:18 3244 3237

Multi-acid digest including Hydrofluoric, Nitric, Perchloric and Hydrochloric acids inTeflon Tubes. Analysed by Inductively Coupled Plasma Mass Spectrometry.

4A/MS 4A/ : MPL_W002, MS : ICP_W003Intertek Genalysis Perth05/06/19 00:13 3244 3237

Multi-acid digest including Hydrofluoric, Nitric, Perchloric and Hydrochloric acids inTeflon Tubes. Analysed by Inductively Coupled Plasma Optical (Atomic) EmissionSpectrometry.

4A/OE 4A/ : MPL_W002, OE : ICP_W004Intertek Genalysis Perth05/06/19 00:13 3244 3237

Digestion by hot acid(s) and Induction Furnace Analysed by Infrared Spectrometry

C71/CSA Intertek Genalysis Perth10/06/19 18:42 3244 3237

Alkaline fusion (Nickel crucible) specific for Fluorine. Analysed by Specific IonElectrode.

FC7/SIE ENV_W012, SIE : ENV_W012Intertek Genalysis Perth04/06/19 15:53 3244 3237

Low temperature Perchloric acid digest specific for Mercury. Analysed by ColdVapour Generation Atomic Absorption Spectrometry.

HG1/CV Intertek Genalysis Perth06/06/19 22:39 3244 3237

Digestion to eliminate sulphides. Analysed by Inductively Coupled Plasma Optical(Atomic) Emission Spectrometry.

S71/OE Intertek Genalysis Perth07/06/19 08:27 3244 3237

The results provided are not intended for commercialsettlement purposes Page 6 of 6


GCA1907/2


Method Code NATA Scope of AccreditationAnalysing LaboratoryNATA Laboratory AccreditationDate Tested

Digestion in boiling Na2CO3 solution to dissolve sulphate sulphur. Analysed byGravimetric Technique

S72/GR Intertek Genalysis Perth19/06/19 13:33 3244 3237

Aqua-Regia digest followed by Precipitation and Concentration. Specific forSelenium. Analysed by Inductively Coupled Plasma Mass Spectrometry.

SE1/MS Intertek Genalysis Perth05/06/19 08:35 3244 3237

Acid Soluble soil. Analysed by Inductively Coupled Plasma Optical (Atomic) EmissionSpectrometry.

SHCl/OE Intertek Genalysis Perth05/06/19 09:20 3244 3237

Reporting weights of samples

WT01 Intertek Genalysis Perth21/06/19 15:18 3244 3237



GCA1907/2

Dr G Campbell Graeme Campbell and Associates Pty Ltd PO Box 247 Unit B 15 Rose Street Bridgetown WA 6255

EAL Lab ID I3652

Number of Samples 1 in duplicate Customer Job Reference GCA-Job-No. 1907/2 Date Received 10 July 2019 Date Reported 23 July 2019

The Chromium Reducible Sulfur (CRS), Total Sulfur (TS – LECO) results provided below have been provided in accordance to the requirements of GCA for the analysis of sulfide in samples of waste rock, ore, tailings and soils. Samples submitted by GCA correspond to pulps (nominal 75 µm) prepared by pulverising as per standard procedures for mining projects.

The analysis is in accordance with the National Acid Sulfate Soils Guidance: National acid sulfate soils identification and laboratory methods manual (2018).

1.0 Chromium Reducible Sulfur (CRS) Ring mill ground sample at a sample weight from around 0.05-0.5 g is added to a 150 mL quick fit flask with 1 g of Cr powder. Ethanol is used to wash down the sides of the quick fit flask. The flask is placed on the cold hotplate and locked into the condensers of the CRS unit. 40 mL of zinc acetate trapping solution is dispensed into a 100 mL erlenmeyer flask. A new pasturer pipette, attached to the top of the condenser is inserted into the trapping solution. The system is purged with argon gas for 3 minutes. 60 mL of 5.65 M hydrochloric acid is slowly added to the sample flask. Once dispensed the hotplate is turned on and the system allowed to proceed for 35 min with cold water circulating through the condensers.

On completion the 1 mL of starch indicator solution is added to the trapping solution and 20 mL of 5.65 M hydrochloric acid washed down the side of the flask into the trap. An iodometric titration is quickly undertaken to a permanent blue endpoint with standardised 0.025 M Iodine Solution.

A 0.025 N Sodium thiosulfate solution is used daily to assess recovery; the expected value is 0.16% S ± 0.01%.

Reference:

Sullivan, L, Ward, N, Toppler, N and Lancaster, G 2018, National Acid Sulfate Soils Guidance: National acid sulfate soils identification and laboratory methods manual, Department of Agriculture and Water Resources, Canberra, ACT.

2.0 Total Sulfur - LECO Ring mill ground sample at a sample weight of around 0.2 g is added to a ceramic crucible with Comcat (tungsten oxide) as a combustion catalyst. The crucibles are placed in a LECO TruMAC SC832 combustion furnace at 1450˚C for determination of sulfur gases by IR detection. Calibration is conducted with a large range of standards from 0–25% S. Reference sample 502-897 LN1000(BBOT) is used with each run; the expected value is 7.35% S ± 0.1%.

Results

Notes:

1. All analysis is reported on a dry weight (DW) basis. 2. Analytical procedures are sourced from Sullivan L, Ward N, Toppler N and Lancaster G. 2018. National acid sulfate soils guidance: national acid sulfate soils identification and laboratory methods manual, Department of Agriculture and Water Resources, Canberra, ACT. CC BY 4.0. 3. Results refer to samples as received at the laboratory. This report is not to be reproduced except in full. 4. Analysis conducted between sample arrival date and reporting date. 5. All services undertaken by EAL are covered by the EAL Laboratory Services Terms and Conditions (refer scu.edu.au/eal or on request).

Please contact the laboratory if you have any queries.

Yours faithfully,

Graham Lancaster,

Laboratory Director/ Manager

milli Digest- milli pH Vigour of BULK-Conc. Pipette moles Slurry- Conc. Titre moles after 'Fizzing' from ANC

ID WT Volume H+ Final- Volume OH- H2O2 HCl Addition (kg H2SO4/(g) (M) (mL) Added pH (M) (mL) Added Added ('in-the-cold') tonne)

GCA11916 2.06 0.50 30 15.00 1.5 0.10 36.75 3.675 2.5 moderate - delayed start 270GCA11916 d 2.05 0.50 30 15.00 1.5 0.10 37.85 3.785 2.5 268

ANC Std 2.00 0.50 10 5.00 1.4 0.10 10.60 1.060 > 4.0 97ANC Std d 2.00 0.50 10 5.00 1.4 0.10 10.55 1.055 > 4.0 97

M-HCl - 0.50 5 2.50 0.10 25.15 2.52 100.6%M-HCl (d) - 0.50 5 2.50 0.10 25.10 2.51 100.4%

Notes:1. Testing performed on dried tailings-solids that was not pulverised to -75 µm nominal.2. ca. 20 mL of high-purity-deionised-water (HPDW) added to all samples (including HCl-solution 'blanks') initially.3. HCl solution added manually via volumetric glass pipette (A Class).4. HCl and NaOH solutions certified reagents from Merck (viz. Titripur® reagents in hermetically-sealed Titripac® casks).5. Sample weight, and volume and strength of HCl added, based on corresponding CO3-C value(s).6. During acid-digestion temperature of waterbath is 80 +/- 5 oC, and digestion performed for 1.0 hr with beakers swirled by hand 1-2 times during this reaction period. Digestion performed using 250 mL tall-form beakers covered with watchglasses.7. After completion of acid-digestion step, the test-slurries are boiled for ca. 1 min to expel any dissolved CO2(aq) which is important for theattainment of a stable pH7 end-point in the subsequent back-titration with NaOH solution.8. Following cooling to room-T, digest-slurry-final-pH is measured. HPDW is then added to bring test-slurry volume to ca. 125 mL for titration with NaOH solution.9. Titration with NaOH performed manually using 50 mL glass burette with slurry stirred using magnetic stirrer-bar. Fast titration with stopcock fully open until slurry-pH rises to approximate range 4.0-4.5 when titration stops for H2O2 addition.10. Three drops of 30 % H2O2 (v/v) [adjusted to pH 4.5] added to slurry to oxidise soluble-Fe(II) forms ('latent-acidity') and precipitation of Fe(III)/Al-oxyhydroxides, etc. Minimum slurry-pH attained following H2O2 addition recorded.11. Following completion of H2O2 addition, titration with NaOH continues to a pH7 end-point. Titration with NaOH undertakenso that slurry-pH at end-point is within range 6.9-7.1 (i.e. pH 7.0 +/- 0.1) for ca. 30 seconds. [Related pH-end-point stability criteriafor manual titration (cf. autotititration) option applies in ASTM E1915-13, and AS-4969.12-09].12. ANC Standard is pulped mixture of quartz and AR CaCO3 (CO3-C = 1.21 %; ANC = 99 kg H2SO4/tonne).

The main variation to the AMIRA (2002) method is the initial 'applied HCl loading', as governed by CO3-C value.

Dr GD Campbell30th June 2019


ACID-NEUTRALISATION-CAPACITY (ANC) TESTWORK:BASED ON AMIRA (2002) WITH VARIATIONS TO CONSTRAIN DISSOLUTION OFNON-CARBONATE-MINERALS UNRELATED TO CIRCUM-NEUTRAL BUFFERING

SAMPLE HCl NaOH

SAVE FOR VANISHINGLY-SMALL RATES OF PYRITE OXIDATION (e.g. < 0.1 kg H2SO4/tonne/year)

Cumulative Cumulative Cumulative CumulativeVolume of Acid Acid Consumption pH Volume of Acid Acid Consumption pH

Added (mL) (kg H2SO4/tonne) Added (mL) (kg H2SO4/tonne)

0.00 0.0 8.7 12.40 60.8 3.70.40 2.0 7.2 12.80 62.7 3.60.80 3.9 6.8 13.20 64.7 3.61.20 5.9 6.7 13.60 66.6 3.61.60 7.8 6.6 14.00 68.6 3.52.00 9.8 6.5 14.40 70.6 3.52.40 11.8 6.4 14.80 72.5 3.52.80 13.7 6.3 15.20 74.5 3.43.20 15.7 6.3 15.60 76.4 3.43.60 17.6 6.2 16.00 78.4 3.44.00 19.6 6.1 16.40 80.4 3.44.40 21.6 6.0 16.80 82.3 3.34.80 23.5 6.0 17.20 84.3 3.35.20 25.5 5.8 17.60 86.2 3.35.60 27.4 5.7 18.00 88.2 3.36.00 29.4 5.6 18.40 90.2 3.36.40 31.4 5.5 18.80 92.1 3.26.80 33.3 5.3 19.20 94.1 3.27.20 35.3 5.1 19.60 96.0 3.27.60 37.2 4.9 20.00 98.0 3.28.00 39.2 4.7 20.40 100.0 3.28.40 41.2 4.5 20.80 101.9 3.28.80 43.1 4.3 21.20 103.9 3.29.20 45.1 4.2 21.60 105.8 3.19.60 47.0 4.1 22.00 107.8 3.1

10.00 49.0 4.0 22.40 109.8 3.110.40 51.0 3.9 22.80 111.7 3.110.80 52.9 3.9 23.20 113.7 3.111.20 54.9 3.8 23.60 115.6 3.111.60 56.8 3.8 24.00 117.6 3.112.00 58.8 3.7 24.40 119.6 3.1

Notes: Titration performed using Metrohm® 736 Titrino auto-titrator, and 0.05 M-H2SO4. Equlibration time betweentitrant additions is 15 minutes.1.00 g of non-pulped (nominal -150 µm) sample initially dispersed in ca. 150 mL of deionised-water.Test-suspension in contact with air in a CT-room @ 20 (+/1 1-2) oC, and continuously stirred.Calibration of pH-Glass Electrode:Immediately prior to titration: asymmetry potential = 9 mV (pH=7.00); slope-point = 182 mV (pH=4.00);97.3 % of Nernstian response.

Dr GD Campbell 29th May 2019


Laboratory Report

pH-BUFFERING TESTWORK (GCA11916)



0.00 0.0 9.6 21.60 105.8 6.20.40 2.0 8.8 22.00 107.8 6.20.80 3.9 8.3 22.40 109.8 6.21.20 5.9 7.9 22.80 111.7 6.21.60 7.8 7.8 23.20 113.7 6.22.00 9.8 7.7 23.60 115.6 6.12.40 11.8 7.6 24.00 117.6 6.12.80 13.7 7.5 24.40 119.6 6.13.20 15.7 7.5 24.80 121.5 6.13.60 17.6 7.4 25.20 123.5 6.04.00 19.6 7.4 25.60 125.4 6.04.40 21.6 7.4 26.00 127.4 6.04.80 23.5 7.3 26.40 129.4 6.05.20 25.5 7.3 26.80 131.3 5.95.60 27.4 7.2 27.20 133.3 5.96.00 29.4 7.2 27.60 135.2 5.96.40 31.4 7.2 28.00 137.2 5.86.80 33.3 7.1 28.40 139.2 5.87.20 35.3 7.1 28.80 141.1 5.87.60 37.2 7.1 29.20 143.1 5.78.00 39.2 7.0 29.60 145.0 5.78.40 41.2 7.0 30.00 147.0 5.68.80 43.1 7.0 30.40 149.0 5.69.20 45.1 6.9 30.80 150.9 5.69.60 47.0 6.9 31.20 152.9 5.5

10.00 49.0 6.9 31.60 154.8 5.410.40 51.0 6.9 32.00 156.8 5.410.80 52.9 6.8 32.40 158.8 5.311.20 54.9 6.8 32.80 160.7 5.311.60 56.8 6.8 33.20 162.7 5.212.00 58.8 6.8 33.60 164.6 5.112.40 60.8 6.8 34.00 166.6 5.112.80 62.7 6.7 34.40 168.6 5.013.20 64.7 6.7 34.80 170.5 4.913.60 66.6 6.7 35.20 172.5 4.814.00 68.6 6.7 35.60 174.4 4.814.40 70.6 6.7 36.00 176.4 4.714.80 72.5 6.6 36.40 178.4 4.615.20 74.5 6.6 36.80 180.3 4.615.60 76.4 6.6 37.20 182.3 4.416.00 78.4 6.5 37.60 184.2 4.316.40 80.4 6.5 38.00 186.2 4.216.80 82.3 6.5 38.40 188.2 4.117.20 84.3 6.5 38.80 190.1 4.117.60 86.2 6.4 39.20 192.1 4.018.00 88.2 6.4 39.60 194.0 4.018.40 90.2 6.4 40.00 196.0 3.918.80 92.1 6.4 40.40 198.0 3.919.20 94.1 6.4 40.80 199.9 3.819.60 96.0 6.3 41.20 201.9 3.820.00 98.0 6.3 41.60 203.8 3.720.40 100.0 6.3 42.00 205.8 3.720.80 101.9 6.3 42.40 207.8 3.621.20 103.9 6.3 42.80 209.7 3.6


Laboratory Report

pH-BUFFERING TESTWORK (GCA11916)



43.20 211.7 3.5 49.20 241.1 3.143.60 213.6 3.5 49.60 243.0 3.144.00 215.6 3.5 50.00 245.0 3.144.40 217.6 3.4 50.40 247.0 3.144.80 219.5 3.4 50.80 248.9 3.145.20 221.5 3.4 51.20 250.9 3.045.60 223.4 3.446.00 225.4 3.346.40 227.4 3.346.80 229.3 3.347.20 231.3 3.347.60 233.2 3.248.00 235.2 3.248.40 237.2 3.248.80 239.1 3.2

Notes: Titration performed using Metrohm® 736 Titrino auto-titrator, and 0.05 M-H2SO4. Equlibration time betweentitrant additions is 15 minutes.1.00 g of pulped (nominal -75 µm) sample initially dispersed in ca. 150 mL of deionised-water.Test-suspension in contact with air in a CT-room @ 20 (+/1 1-2) oC, and continuously stirred.Calibration of pH-Glass Electrode:Immediately prior to titration: asymmetry potential = 4 mV (pH=7.00); slope-point = 177 mV (pH=4.00);97.5 % of Nernstian response.

Dr GD Campbell 6th June 2019

GCA11916Test Specifications and ConditionsMoist-Solids (kg) 0.78GWC (%) 3.5Dry-Solids [DS] (kg) 0.75Solids-SG 2.90Dry-Solids Volume (L) 0.26Pore-Fluid Volume (L) 0.03Cell Volume (L) 0.61Gas Volume [GV] (L) 0.32GV/DS Ratio (L/kg) 0.43Temperature (oC) [+/- 0.1] 30.0Measurement with Quantek 901Reaction-Time (days) 4.4Reaction-Time (hrs) 106.0Measured O2-Conc. (%) [+/- 0.1] 18.7O2-Consumption (%) [+/- 0.2] 2.2O2-Consumption (mg O2) 9.5OCR (kg O2/kg/s) 3.29E-11

Notes:Testing performed on moist tailings-solids sample.GWC = Gravimetric-Water Content; SG = Specific-Gravity.SG value is estimated.The relative-error for the OCR values is estimated to be ca. 10-20 %.

Dr GD Campbell6th June 2019


Determination of Oxygen-Consumption Rate (OCR)

Accreditation No. 2562

Date Reported

Contact

SGS Perth Environmental

28 Reid Rd

Perth Airport WA 6105

Marjana Siljanoska

(08) 9373 3500

(08) 9373 3556

[email protected]

1

SGS Reference

Email

Facsimile

Telephone

Address

Manager

Laboratory

GCA Job No.1907/2

GCA Job No.1907/2

[email protected]

0897 612 830

0897 612 829

PO Box 247

Bridgetown

WA 6255


Graeme Campbell

Samples

Order Number

Project

Email

Facsimile

Telephone

Address

Client

CLIENT DETAILS LABORATORY DETAILS

21 Jun 2019

ANALYTICAL REPORT

PE135494 R0

07 Jun 2019Date Received

Accredited for compliance with ISO/IEC 17025 - Testing. NATA accredited laboratory 2562(898/20210).

4-Acid digest subcontracted to SGS Perth Minerals, 28 Reid Rd Perth Airport WA, NATA Accreditation Number 1936, WM193215

COMMENTS

Mary Ann Ola-A

Inorganics Team Leader

SIGNATORIES

SGS Australia Pty Ltd

ABN 44 000 964 278

Environment, Health and Safety 28 Reid Rd

PO Box 32


Welshpool WA 6983

Australia

Australia

t +61 8 9373 3500

f +61 8 9373 3556

www.sgs.com.au

Member of the SGS Group

Page 1 of 621-June-2019

PE135494 R0ANALYTICAL REPORT

PE135494.001

Pulp

GCA11916

Parameter LORUnits

Sample Number

Sample Matrix

Sample Name

Metals in soil by Four Acid digest, ICPMS Method: IMS40Q Tested: 21/6/2019

Silver, Ag* ppm 0.1 0.3

Arsenic, As* ppm 1 310

Barium, Ba* ppm 1 58

Bismuth, Bi* ppm 0.1 <0.1

Cadmium, Cd* ppm 0.1 0.4

Cobalt, Co* ppm 0.1 34

Molybdenum, Mo* ppm 0.1 10

Lead, Pb* ppm 1 8

Antimony, Sb* ppm 0.1 1.4

Selenium, Se* ppm 2 <2

Tin, Sn* ppm 0.3 1.1

Strontium, Sr* ppm 0.1 75

Thorium, Th* ppm 0.05 0.38

Thallium, Tl* ppm 0.2 0.3

Uranium, U* ppm 0.05 0.12

ICPAES after Four Acid Digest Digest Method: ICP40Q Tested: 21/6/2019

Aluminium, Al* ppm 100 45000

Calcium, Ca* ppm 40 61000

Chromium, Cr* ppm 10 390

Copper, Cu* ppm 5 110

Iron, Fe* ppm 100 64000

Potassium, K* ppm 100 13000

Magnesium, Mg* ppm 20 40000

Manganese, Mn* ppm 5 1200

Sodium, Na* ppm 50 8600

Nickel, Ni* ppm 5 190

Phosphorus, P* ppm 20 240

Sulphur, S* ppm 20 9200

Titanium, Ti* ppm 10 1500

Vanadium, V* ppm 1 190

Zinc, Zn* ppm 5 100

Rare Earth Metals in soil by ICPMS Method: IMS12S Tested: 21/6/2019

Mercury, Hg* ppm 0.001 <0.001



PE135494.001

Pulp

GCA11916

Parameter LORUnits

Sample Number

Sample Matrix

Sample Name

Metals in Soils from Alkali Fusion ICP AES Method: ICP90Q Tested: 21/6/2019

Silicon, Si* % 0.42 22.5

Boron, B* ppm 20 90

Total Fluoride in Soil Method: AN142 Tested: 13/6/2019

Total Fluoride mg/kg 50 130


PE135494 R0QC SUMMARY

MB blank results are compared to the Limit of Reporting

LCS and MS spike recoveries are measured as the percentage of analyte recovered from the sample compared the the amount of analyte spiked into the sample.

DUP and MSD relative percent differences are measured against their original counterpart samples according to the formula : the absolute difference of the two results divided

by the average of the two results as a percentage. Where the DUP RPD is 'NA' , the results are less than the LOR and thus the RPD is not applicable.

Total Fluoride in Soil Method: ME-(AU)-[ENV]AN142

MB DUP %RPD LCS

%Recovery

MS

%Recovery

Total Fluoride LB160574 mg/kg 50 <50 9% 87% 120%

LORUnits Parameter QC

Reference


PE135494 R0

METHOD METHODOLOGY SUMMARY

METHOD SUMMARY

Fluoride can be measured in soil as water extractable or 'total' by Ion Selective electrode. In this method the solid

sample is weighed and then fused with sodium hydroxide at 600°C. The sample is carefully neutralise with

hydrochloric acid and the solution of the melt is cooled and made up to volume. The final solution is then compared

to synthetic Digestion Matrix standards with analysis by ISE electrode for a total fluoride result after being

calculated back to original mass.

AN142

Sample solutions (from Four Acid digest) are analysed by Inductively Coupled Plasma-Atomic Emission

Spectrometry (ICP-AES) against matched standards.

ICP40Q

Sample solutions (from Alkali Fusion) are analysed by Inductively Coupled Plasma-Atomic Emission Spectrometry

(ICP-AES) against matched standards.

ICP90Q

Sample solutions are analysed by Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) against matched

standards.

IMS12S

Sample solutions (from Four Acid Digest) are analysed by Inductively Coupled Plasma-Mass Spectrometry

(ICP-MS) against matched standards.

IMS40Q


PE135494 R0

Unless it is reported that sampling has been perfomed by SGS, the samples have been analysed as received.

Solid samples expressed on a dry weight basis.

Where "Total" analyte groups are reported (for example, Total PAHs, Total OC Pesticides) the total will be calculated as the sum of the individual

analytes, with those analytes that are reported as <LOR being assumed to be zero. The summed (Total) limit of reporting is calcuated by summing

the individual analyte LORs and dividing by two. For example, where 16 individual analytes are being summed and each has an LOR of 0.1 mg/kg,

the "Totals" LOR will be 1.6 / 2 (0.8 mg/kg). Where only 2 analytes are being summed, the " Total" LOR will be the sum of those two LORs.

Some totals may not appear to add up because the total is rounded after adding up the raw values.

If reported, measurement uncertainty follow the ± sign after the analytical result and is expressed as the expanded uncertainty calculated using a

coverage factor of 2, providing a level of confidence of approximately 95%, unless stated otherwise in the comments section of this report.

Results reported for samples tested under test methods with codes starting with ARS -SOP, radionuclide or gross radioactivity concentrations are

expressed in becquerel (Bq) per unit of mass or volume or per wipe as stated on the report. Becquerel is the SI unit for activity and equals one

nuclear transformation per second.

Note that in terms of units of radioactivity:

a. 1 Bq is equivalent to 27 pCi

b. 37 MBq is equivalent to 1 mCi

For results reported for samples tested under test methods with codes starting with ARS -SOP, less than (<) values indicate the detection limit for

each radionuclide or parameter for the measurement system used. The respective detection limits have been calculated in accordance with ISO

11929.

The QC and MU criteria are subject to internal review according to the SGS QAQC plan and may be provided on request or alternatively can be

found here: www.sgs.com.au.pv.sgsvr/en-gb/environment.

This document is issued by the Company under its General Conditions of Service accessible at www.sgs.com/en/Terms-and-Conditions.aspx.

Attention is drawn to the limitation of liability, indemnification and jurisdiction issues defined therein.

Any holder of this document is advised that information contained hereon reflects the Company 's findings at the time of its intervention only and

within the limits of Client's instructions, if any. The Company's sole responsibility is to its Client only. Any unauthorized alteration, forgery or

falsification of the content or appearance of this document is unlawful and offenders may be prosecuted to the fullest extent of the law .

This report must not be reproduced, except in full.

IS

LNR

*

**

Insufficient sample for analysis.

Sample listed, but not received.

NATA accreditation does not cover the

performance of this service.

Indicative data, theoretical holding time exceeded.

FOOTNOTES

LOR

↑↓

QFH

QFL

-

NVL

Limit of Reporting

Raised or Lowered Limit of Reporting

QC result is above the upper tolerance

QC result is below the lower tolerance

The sample was not analysed for this analyte

Not Validated



Date Reported

Contact


28 Reid Rd


Marjana Siljanoska

(08) 9373 3500

(08) 9373 3556

[email protected]

2

SGS Reference

Email

Facsimile

Telephone

Address

Manager

Laboratory

GCA Job No.1907/2

GCA Job No.1907/2

[email protected]

0897 612 830

0897 612 829

PO Box 247

Bridgetown

WA 6255


Graeme Campbell

Samples

Order Number

Project

Email

Facsimile

Telephone

Address

Client


10 Jun 2019

ANALYTICAL REPORT

PE135259 R1

29 May 2019Date Received


Metals: Dissolved S: Spike recovery failed acceptance criteria due to the presence of significant concentration of analyte (i.e. the concentration

of analyte exceeds the spike level).

Thiocyanate in Water: Matrix spike recovery failed acceptance criteria due to the presence of significant concentration of analyte (i.e. the

concentration of analyte exceeds the spike level).

This report cancels and supersedes the report No .PE135259 R0 dated 6/6/2019 issued by SGS Environment, Health and Safety due to the

addition of NH3-N and NO3-N results.

COMMENTS

Hue Thanh Ly

Metals Team Leader

Louise Hope

Laboratory Technician

Mary Ann Ola-A


Murray O'Neill

Lab Technician-Nutrients Signatory

Ohmar David

Metals Chemist

Tommy Cheng

ICP Chemist

SIGNATORIES


ABN 44 000 964 278


PO Box 32


Welshpool WA 6983

Australia

Australia

t +61 8 9373 3500

f +61 8 9373 3556

www.sgs.com.au




PE135259.001

Water

GCA11916

PE135259.002

Water

DUPLICATE

Parameter LORUnits

Sample Number

Sample Matrix

Sample Name

pH in water Method: AN101 Tested: 30/5/2019

pH** pH Units - 8.0 -

Conductivity and TDS by Calculation - Water Method: AN106 Tested: 30/5/2019

Conductivity @ 25 C µS/cm 2 6600 -

Total Dissolved Solids (TDS) in water Method: AN113 Tested: 30/5/2019

Total Dissolved Solids Dried at 175-185°C mg/L 10 5600 -

Alkalinity Method: AN135 Tested: 30/5/2019

Total Alkalinity as CaCO3 mg/L 1 110 -

Carbonate Alkalinity as CO3 mg/L 1 <1 -

Bicarbonate Alkalinity as HCO3 mg/L 1 130 -

Chloride by Discrete Analyser in Water Method: AN274 Tested: 30/5/2019

Chloride, Cl mg/L 1 160 -

Sulfate in water Method: AN275 Tested: 4/6/2019

Sulfate, SO4 mg/L 1 3300 -

Fluoride by Ion Selective Electrode in Water Method: AN141 Tested: 30/5/2019

Fluoride by ISE mg/L 0.1 0.3 -

Reactive Silica by Aquakem Discrete Analyser Method: AN270 Tested: 5/6/2019

Reactive Silica, Si mg/L 0.05 3.2 -

Thiocyanate in Water Method: AN156 Tested: 2/6/2019

Thiocyanate mg/L 0.1 1.8 -

Metals in Water (Dissolved) by ICPOES Method: AN320 Tested: 31/5/2019

Phosphorus, P µg/L 50 <50 -

Silicon, Si µg/L 20 4000 -

Sulfur, S µg/L 100 1100000 -



PE135259.001

Water

GCA11916

PE135259.002

Water

DUPLICATE

Parameter LORUnits

Sample Number

Sample Matrix

Sample Name

Cations in Water (Dissolved) by ICPOES Method: AN020/AN320 Tested: 4/6/2019

Calcium, Ca µg/L 10 330000 -

Magnesium, Mg µg/L 10 150000 -

Potassium, K µg/L 50 1500000 -

Sodium, Na µg/L 50 280000 -

Trace Metals (Dissolved) in Water by ICPMS Method: AN318 Tested: 4/6/2019

Aluminium, Al µg/L 5 23 -

Antimony, Sb µg/L 1 34 -

Arsenic, As µg/L 1 240 -

Barium, Ba µg/L 0.2 200 -

Bismuth, Bi µg/L 1 <1 -

Boron, B µg/L 5 270 -

Cadmium, Cd µg/L 0.1 0.1 -

Chromium, Cr µg/L 1 150 -

Cobalt, Co µg/L 1 640 -

Copper, Cu µg/L 1 1000 -

Iron, Fe µg/L 5 280 -

Lead, Pb µg/L 1 <1 -

Manganese, Mn µg/L 1 140 -

Molybdenum, Mo µg/L 0.5 63 -

Nickel, Ni µg/L 1 2000 -

Selenium, Se µg/L 1 12 -

Silver, Ag µg/L 1 27 -

Strontium, Sr µg/L 1 3 -

Thallium, Tl µg/L 1 <1 -

Thorium, Th µg/L 1 <1 -

Tin, Sn µg/L 1 <1 -

Uranium, U µg/L 1 2 -

Vanadium, V µg/L 1 <1 -

Zinc, Zn µg/L 5 <5 -

Mercury (dissolved) in Water Method: AN311(Perth)/AN312 Tested: 4/6/2019

Mercury µg/L 0.05 <0.05 -

Hexavalent Chromium in water by Discrete Analyser Method: AN283 Tested: 6/6/2019

Hexavalent Chromium, Cr6+ mg/L 0.001 0.025 0.024

Nitrate Nitrogen and Nitrite Nitrogen (NOx) by FIA Method: AN258 Tested: 10/6/2019



PE135259.001

Water

GCA11916

PE135259.002

Water

DUPLICATE

Parameter LORUnits

Sample Number

Sample Matrix

Sample Name

Nitrate Nitrogen and Nitrite Nitrogen (NOx) by FIA Method: AN258 Tested: 10/6/2019 (continued)

Nitrate Nitrogen, NO₃ as N mg/L 0.05 3.2 -

Ammonia Nitrogen by FIA Method: AN261 Tested: 10/6/2019

Ammonia Nitrogen, NH₃ as N mg/L 0.05 45 -







Alkalinity Method: ME-(AU)-[ENV]AN135

MB DUP %RPD LCS

%Recovery

Total Alkalinity as CaCO3 LB160073 mg/L 1 <1 0 - 1% 102%

Carbonate Alkalinity as CO3 LB160073 mg/L 1 <1

Bicarbonate Alkalinity as HCO3 LB160073 mg/L 1 1


Reference

Ammonia Nitrogen by FIA Method: ME-(AU)-[ENV]AN261

MB LCS

%Recovery

Ammonia Nitrogen, NH₃ as N LB160394 mg/L 0.05 <0.05 109%


Reference

Cations in Water (Dissolved) by ICPOES Method: ME-(AU)-[ENV]AN020/AN320

MB DUP %RPD

Calcium, Ca LB160146 µg/L 10 <10 0%

Magnesium, Mg LB160146 µg/L 10 <10 0%

Potassium, K LB160146 µg/L 50 <50 0%

Sodium, Na LB160146 µg/L 50 <50 0%


Reference

Chloride by Discrete Analyser in Water Method: ME-(AU)-[ENV]AN274

MB DUP %RPD LCS

%Recovery

MS

%Recovery

Chloride, Cl LB159961 mg/L 1 <1 0 - 6% 108 - 109% 87 - 103%

LB160074 mg/L 1 <1 0% 105% 84%


Reference

Conductivity and TDS by Calculation - Water Method: ME-(AU)-[ENV]AN106

MB DUP %RPD LCS

%Recovery

Conductivity @ 25 C LB160072 µS/cm 2 <2 0 - 1% 102%


Reference







Fluoride by Ion Selective Electrode in Water Method: ME-(AU)-[ENV]AN141

MB DUP %RPD LCS

%Recovery

MS

%Recovery

Fluoride by ISE LB160101 mg/L 0.1 <0.1 0% 100% 88%


Reference

Hexavalent Chromium in water by Discrete Analyser Method: ME-(AU)-[ENV]AN283

MB DUP %RPD LCS

%Recovery

MS

%Recovery

Hexavalent Chromium, Cr6+ LB160265 mg/L 0.001 <0.001 0 - 9% NA NA


Reference

Mercury (dissolved) in Water Method: ME-(AU)-[ENV]AN311(Perth)/AN312

MB DUP %RPD LCS

%Recovery

MS

%Recovery

Mercury LB160115 µg/L 0.05 <0.05 4 - 12% 113% 105%


Reference

Metals in Water (Dissolved) by ICPOES Method: ME-(AU)-[ENV]AN320

MB DUP %RPD LCS

%Recovery

MS

%Recovery

Phosphorus, P LB160097 µg/L 50 <50 100% 103%

Silicon, Si LB160097 µg/L 20 <20 1% 106% 97%

Sulfur, S LB160097 µg/L 100 <100 100% -1243%


Reference

Nitrate Nitrogen and Nitrite Nitrogen (NOx) by FIA Method: ME-(AU)-[ENV]AN258

MB LCS

%Recovery

Nitrate Nitrogen, NO₃ as N LB160394 mg/L 0.05 <0.05 NA


Reference

pH in water Method: ME-(AU)-[ENV]AN101

MB DUP %RPD LCS

%Recovery

pH** LB160072 pH Units - 5.7 0% 101%


Reference







Reactive Silica by Aquakem Discrete Analyser Method: ME-(AU)-[ENV]AN270

DUP %RPD LCS

%Recovery

MS

%Recovery

Reactive Silica, Si LB160169 mg/L 0.05 1% 100% 88 - 102%


Reference

Sulfate in water Method: ME-(AU)-[ENV]AN275

MB DUP %RPD LCS

%Recovery

MS

%Recovery

Sulfate, SO4 LB159961 mg/L 1 <1 1 - 4% 108 - 110% 100 - 102%


Reference

Thiocyanate in Water Method: ME-(AU)-[ENV]AN156

MB DUP %RPD LCS

%Recovery

MS

%Recovery

MSD %RPD

Thiocyanate LB160105 mg/L 0.1 <0.1 1 - 2% 108 - 115% 71 - 75% 2 - 91%


Reference

Total Dissolved Solids (TDS) in water Method: ME-(AU)-[ENV]AN113

MB DUP %RPD LCS

%Recovery

MS

%Recovery

MSD %RPD

Total Dissolved Solids Dried at 175-185°C LB160026 mg/L 10 <10 0 - 2% 94% 95% 0%


Reference

Trace Metals (Dissolved) in Water by ICPMS Method: ME-(AU)-[ENV]AN318

MB DUP %RPD LCS

%Recovery

MS

%Recovery

Aluminium, Al LB160042 µg/L 5 <5 30% 105%

Antimony, Sb LB160042 µg/L 1 <1 0% 84%

Arsenic, As LB160042 µg/L 1 <1 7% 108% 111%

Barium, Ba LB160042 µg/L 0.2 <1.0 1% 101%

Bismuth, Bi LB160042 µg/L 1 <1 0% 99%

Boron, B LB160042 µg/L 5 <5 2% 97%

Cadmium, Cd LB160042 µg/L 0.1 <0.1 0% 100% 93%

Chromium, Cr LB160042 µg/L 1 <1 0% 99% 105%

Cobalt, Co LB160042 µg/L 1 <1 0% 101%

Copper, Cu LB160042 µg/L 1 <1 0% 106% 103%

Iron, Fe LB160042 µg/L 5 <5 9% 97%

Lead, Pb LB160042 µg/L 1 <1 0% 101% 99%

Manganese, Mn LB160042 µg/L 1 <1 12% 96% 98%

Molybdenum, Mo LB160042 µg/L 0.5 <1.0 5% 100%

Nickel, Ni LB160042 µg/L 1 <1 0% 100% 100%

Selenium, Se LB160042 µg/L 1 <1 0% 98%

Thallium, Tl LB160042 µg/L 1 <1 0% 85%

Thorium, Th LB160042 µg/L 1 <1 0% 91%

Tin, Sn LB160042 µg/L 1 <1 0% 91%

Uranium, U LB160042 µg/L 1 <1 1% 84%

Vanadium, V LB160042 µg/L 1 <1 0% 96%

Zinc, Zn LB160042 µg/L 5 <5 0% 120% 88%


Reference


PE135259 R1


METHOD SUMMARY

Nitrate and Nitrite by FIA: In an acidic medium, nitrate is reduced quantitatively to nitrite by cadmium metal. This

nitrite plus any original nitrite is determined as an intense red-pink azo dye at 540 nm following diazotisation with

sulphanilamide and subsequent coupling with N-(1-naphthyl) ethylenediamine dihydrochloride. Without the

cadmium reduction only the original nitrite is determined. Reference APHA 4500-NO3- F.

Dissolved Cations Low LOR by ICP-OES: Method is as per routine ICP OES method reporting a variation to the

method being lower limit of reporting (LOR) for selected cations as validated by the site. Referenced to APHA

3120B.

AN020/AN320 LL

pH in Soil Sludge Sediment and Water: pH is measured electrometrically using a combination electrode (glass plus

reference electrode) and is calibrated against 3 buffers purchased commercially. For soils, an extract with water is

made at a ratio of 1:5 and the pH determined and reported on the extract. Reference APHA 4500-H+.

AN101

Conductivity and TDS by Calculation: Conductivity is measured by meter with temperature compensation and is

calibrated against a standard solution of potassium chloride. Conductivity is generally reported as µmhos/cm or

µS/cm @ 25°C. For soils, an extract with water is made at a ratio of 1:5 and the EC determined and reported on

the extract, or calculated back to the as-received sample. Total Dissolved Salts can be estimated from conductivity

using a conversion factor, which for natural waters, is in the range 0.55 to 0.75. SGS use 0.6. Reference APHA

2510 B.

AN106

Salinity may be calculated in terms of NaCl from the sample conductivity. This assumes all soluble salts present,

measured by the conductivity, are present as NaCl.

AN106

Total Dissolved Solids: A well-mixed filtered sample of known volume is evaporated to dryness at 180°C and the

residue weighed. Approximate methods for correlating chemical analysis with dissolved solids are available.

Reference APHA 2540 C.

AN113

The Total Dissolved Solids residue may also be ignited at 550 C and volatile TDS (Organic TDS) and non-volatile

TDS (Inorganic) can be determined.

AN113

Alkalinity (and forms of) by Titration: The sample is titrated with standard acid to pH 8.3 (P titre) and pH 4.5 (T titre)

and permanent and/or total alkalinity calculated. The results are expressed as equivalents of calcium carbonate or

recalculated as bicarbonate, carbonate and hydroxide. Reference APHA 2320. Internal Reference AN135

AN135

Determination of Fluoride by ISE: A fluoride ion selective electrode and reference electrode combination , in the

presence of a pH/complexation buffer, is used to determine the fluoride concentration. The electrode millivolt

response is measured logarithmically against fluoride concentration. Reference APHA F- C.

AN141

At an acidic pH, ferric ion (Fe3+) forms an intense red colour with SCN- which is suitable for colorimetric

determination. Referenced to APHA 4500CNM.

AN156

Ammonia by Continuous Flow Analyser: Ammonium in a basic medium forms ammonia gas, which is separated

from the sample matrix by diffusion through a polypropylene membrane . The ammonia is reacted with phenol

and hypochlorite to form indophenol blue at an intensity proportional to the ammonia concentration. The blue

colour is intensified with sodium nitroprusside and the absorbance measured at 630 nm. The sensitivity of the

automated method is 10-20 times that of the macro method. Reference APHA 4500-NH3 H.

AN261

Reactive forms of silicon in acid solution below pH 2 react with ammonium molybdate ions to form a yellow

silicomolybdate which is then reduced with ascorbic acid to produce a blue silicomolybdate complex. Oxalic acid is

added to destroy any molybdophosphoric acid. Colourimetric determination by Aquakem Discrete Analyser .

AN270

Chloride by Aquakem DA: Chloride reacts with mercuric thiocyanate forming a mercuric chloride complex. In the

presence of ferric iron, highly coloured ferric thiocyanate is formed which is proportional to the chloride

concentration. Reference APHA 4500Cl-

AN274


PE135259 R1


METHOD SUMMARY

sulfate by Aquakem DA: sulfate is precipitated in an acidic medium with barium chloride. The resulting turbidity is

measured photometrically at 405nm and compared with standard calibration solutions to determine the sulfate

concentration in the sample. Reference APHA 4500-SO42-. Internal reference AN275.

AN275

Hexavalent Chromium via Discrete Analyser: Soluble hexavalent chromium forms a red/violet colour with

diphenylcarbazide in acidic solution. This procedure is very sensitive and nearly specific for Cr6+. If total chromium

is also measured the trivalent form of chromium Cr3+ can be calculated from the difference (Total Cr - Cr6+).

Reference APHA3500CrB.

AN283

Mercury by Cold Vapour AAS in Waters: Mercury ions are reduced by stannous chloride reagent in acidic solution

to elemental mercury. This mercury vapour is purged by nitrogen into a cold cell in an atomic absorption

spectrometer or mercury analyser. Quantification is made by comparing absorbances to those of the calibration

standards. Reference APHA 3112/3500.

AN311(Perth)/AN312

Determination of elements at trace level in waters by ICP-MS technique, in accordance with USEPA 6020A.AN318

Metals by ICP-OES: Samples are preserved with 10% nitric acid for a wide range of metals and some non-metals.

This solution is measured by Inductively Coupled Plasma. Solutions are aspirated into an argon plasma at

8000-10000K and emit characteristic energy or light as a result of electron transitions through unique energy

levels. The emitted light is focused onto a diffraction grating where it is separated into components .

AN320

Photomultipliers or CCDs are used to measure the light intensity at specific wavelengths. This intensity is directly

proportional to concentration. Corrections are required to compensate for spectral overlap between elements.

Reference APHA 3120 B.

AN320

Free and Total Carbon Dioxide may be calculated using alkalinity forms only when the samples TDS is <500mg/L.

If TDS is >500mg/L free or total carbon dioxide cannot be reported . APHA4500CO2 D.

Calculation


PE135259 R1

Unless it is reported that sampling has been perfomed by SGS, the samples have been analysed as received.

















11929.









IS

LNR

*

**






FOOTNOTES

LOR

↑↓

QFH

QFL

-

NVL

Limit of Reporting





Not Validated


2

TEST REPORTMINERALS

TESTED BY

Accredited for compliance with ISO/IEC 17025.Company Accreditation Number 3244

Intertek15 Davison Street, Maddington 6109, Western AustraliaPO Box 144, Gosnells 6990, Western AustraliaTel: +61 8 9251 8100Email: [email protected]

APPROVED SIGNATURE FOR

Craig RITCHIEOperations Manager - Perth

JOB INFORMATION

CLIENT

REPORT NOTES

GRAEME CAMPBELLCAMPBELL, GRAEME and ASSOCIATESPO Box 247BRIDGETOWN, W.A. 6255AUSTRALIA

NO. ELEMENTS :CLIENT ORDER NO.SAMPLE SUBMISSION NO.PROJECT

:::: WaterSAMPLE TYPE

JOB CODE : 143.0/1908224NO. SAMPLES : 6

DATE RECEIVED :DATE TESTED :DATE REPORTED :DATE PRINTED :

8GCA1907/2 (Job 1 of 1)

WARRAWOONA

29/05/201907/06/201913/06/201913/06/2019



GCA1907/2

2

Company Accreditation Number 3244Analysing Laboratory: Intertek Genalysis Perth

NOTESNATA ENDORSED DOCUMENT

The contents of this report have been prepared in accordance with the terms of NATA accreditation and as suchshould only be reproduced in full.The analysis results reported herein have been obtained using the following methods and conditions:

Project: WARRAWOONA

The solutions were analyzed as receivedThe raw sample was analyzed for F and SCN.The acidified sample was analyzed for As, Sb and Se by ICPMS.The NaOH dosed sample was analyzed for FreeCN, CN-WAD and Total CN

Genalysis method codes:ENV_W011 (F), ENV_W006 (SCN),ICP_W003 (MS)ENV_040 (CN-WAD), ENV_W041 (FreeCN) and ENV_042 (CN-Tot)

Intertek Genalysis signatoryHuong Thu PHAMICP Chemist

Date: 13-Jun-2019



GCA1907/2

1

SIGNIFICANT FIGURES

SNR*

DTFIS

= Sample Not Received= Result Checked= Result still to come

UA = Unable to Assay> = Value beyond Limit of Method

= Extra Sample Received Not Listed

X = Less than Detection Limit = Not AnalysedNA

SAMPLE STORAGE

LEGEND

All solid samples (assay pulps, bulk pulps and residues will be stored for 60 days without charge. Following this samples will bestored at a daily rate until clients written advice regarding return, collection or disposal is received. If storage information is notsupplied on the submission, or arranged with the laboratory in writing the default will be to store the samples with theapplicable charges. Storage is charged at $4.00 per m3 per day, expenses related to the return or disposal of samples will becharged at cost. Current disposal cost is charged at $150.00 per m3.

Samples received as liquids, waters or solutions will be held for 60 days free of charge then disposed of, unless written advice forreturn or collection is received.

It is common practice to report data derived from analytical instrumentation to a maximum of two or three significant figures.Some data reported herein may show more figures than this. The reporting of more than two or three figures in no way impliesthat figures beyond the least significant digit have significance.For more information on the uncertainty on individual reported values, please contact the laboratory.

= Insufficient Sample for Analysis+


GCA1907/2Page 3 of 5

The results provided are not intended for commercialsettlement purposes

As FELEMENTS Sb Se CN-Tot CN-WAD FreeCN SCNug/l mg/lUNITS ug/l ug/l mg/l mg/l mg/l mg/L

1 0.1DETECTION LIMIT 0.1 5 0.5 0.5 0.01 0.02DIGEST

/MS /SIEANALYTICAL FINISH /MS /MS /COL /COL /COL /COLSAMPLE NUMBERS0001 GCA11916 NaOH 5.5 3.8 1.000002 GCA11916 NaOH DUP 5.4 3.9 1.00

0.30003 GCA11916 Raw 2.780.30004 GCA11916 Raw DUP 2.76

2440005 GCA11916 HNO3 40.0 152450006 GCA11916 HNO3 DUP 40.1 16

STANDARDS0001 1mg/L SCN 1.00

0.60002 GWS-2810003 TMDW 10.0 10

BLANKSX0001 Control Blank X X X X

X0002 Control Blank X X



Part 1/1

Page 4 of 5


Method Code Analysing LaboratoryDate Tested

No digestion or other pre-treatment undertaken. Analysed by UV-VisibleSpectrometry.

/COL Intertek Genalysis Perth07/06/19 13:27

No digestion or other pre-treatment undertaken. Analysed by Inductively CoupledPlasma Mass Spectrometry.

/MS Intertek Genalysis Perth06/06/19 11:17

No digestion or other pre-treatment undertaken. Analysed by Specific IonElectrode.

/SIE Intertek Genalysis Perth31/05/19 09:10

Reporting weights of samples

WT01 Intertek Genalysis Perth



GCA1907/2


Date Reported

Contact


28 Reid Rd


Marjana Siljanoska

(08) 9373 3500

(08) 9373 3556

[email protected]

3

SGS Reference

Email

Facsimile

Telephone

Address

Manager

Laboratory

GCA Job No.1907/2

GCA Job No.1907/2

[email protected]

0897 612 830

0897 612 829

PO Box 247

Bridgetown

WA 6255


Graeme Campbell

Samples

Order Number

Project

Email

Facsimile

Telephone

Address

Client


03 Sep 2019

ANALYTICAL REPORT

PE137453 R0

28 Aug 2019Date Received


Metals: The over range results on ICPMS Method AN318 were reported using ICPOES method AN320.

Metals: Dissolved B: Spike recovery failed acceptance criteria due to the presence of significant concentration of analyte (i.e. the concentration of

analyte exceeds the spike level).

COMMENTS

Hue Thanh Ly

Metals Team Leader

Louise Hope

Laboratory Technician

Mary Ann Ola-A


Ohmar David

Metals Chemist

Sanaa Hussain

Chemist

SIGNATORIES


ABN 44 000 964 278


PO Box 32


Welshpool WA 6983

Australia

Australia

t +61 8 9373 3500

f +61 8 9373 3556

www.sgs.com.au


Page 1 of 903-September-2019


PE137453.001

Water

GCA11916-HC-0a

PE137453.002

Water

GCA11916-HC-0b

Parameter LORUnits

Sample Number

Sample Matrix

Sample Name


pH** pH Units 0.1 7.7 7.9


Conductivity @ 25 C µS/cm 2 530 2800


Bicarbonate Alkalinity as HCO3 mg/L 1 83 100


Chloride, Cl mg/L 1 28 110


Sulfate, SO4 mg/L 1 180 1200


Fluoride by ISE mg/L 0.1 0.2 0.3


Phosphorus, P µg/L 50 <50 <50

Silicon, Si µg/L 20 2300 2100

Sulfur, S µg/L 100 97000 490000


Calcium, Ca µg/L 10 40000 87000

Magnesium, Mg µg/L 10 33000 84000

Potassium, K µg/L 50 22000 410000

Sodium, Na µg/L 50 3100 130000


Aluminium, Al µg/L 5 26 35

Antimony, Sb µg/L 1 10 17

Arsenic, As µg/L 1 240 340

Barium, Ba µg/L 0.2 8.5 110

Bismuth, Bi µg/L 1 <1 <1

Boron, B µg/L 5 210 220

Cadmium, Cd µg/L 0.1 <0.1 <0.1

Chromium, Cr µg/L 1 <1 <1



PE137453.001

Water

GCA11916-HC-0a

PE137453.002

Water

GCA11916-HC-0b

Parameter LORUnits

Sample Number

Sample Matrix

Sample Name

Trace Metals (Dissolved) in Water by ICPMS Method: AN318 Tested: 29/8/2019 (continued)

Cobalt, Co µg/L 1 21 260

Copper, Cu µg/L 1 5 12

Iron, Fe µg/L 5 30 29

Lead, Pb µg/L 1 <1 <1

Manganese, Mn µg/L 1 18 40

Molybdenum, Mo µg/L 0.5 12 27

Nickel, Ni µg/L 1 10 43

Selenium, Se µg/L 1 <1 6

Silver, Ag µg/L 1 7 <1

Strontium, Sr µg/L 1 200 720

Thallium, Tl µg/L 1 <1 <1

Thorium, Th µg/L 1 <1 <1

Tin, Sn µg/L 1 <1 <1

Uranium, U µg/L 1 <1 <1

Vanadium, V µg/L 1 <1 1

Zinc, Zn µg/L 5 <5 9


Mercury µg/L 0.05 <0.05 <0.05



PE137453.003

Water

GCA11916-HC-2

Parameter LORUnits

Sample Number

Sample Matrix

Sample Name


pH** pH Units 0.1 8.1


Conductivity @ 25 C µS/cm 2 290


Bicarbonate Alkalinity as HCO3 mg/L 1 110


Chloride, Cl mg/L 1 5


Sulfate, SO4 mg/L 1 41


Fluoride by ISE mg/L 0.1 0.3


Phosphorus, P µg/L 50 <50

Silicon, Si µg/L 20 1900

Sulfur, S µg/L 100 18000


Calcium, Ca µg/L 10 10000

Magnesium, Mg µg/L 10 7300

Potassium, K µg/L 50 47000

Sodium, Na µg/L 50 4000


Aluminium, Al µg/L 5 29

Antimony, Sb µg/L 1 14

Arsenic, As µg/L 1 390

Barium, Ba µg/L 0.2 5.4

Bismuth, Bi µg/L 1 <1

Boron, B µg/L 5 200

Cadmium, Cd µg/L 0.1 <0.1

Chromium, Cr µg/L 1 <1



PE137453.003

Water

GCA11916-HC-2

Parameter LORUnits

Sample Number

Sample Matrix

Sample Name

Trace Metals (Dissolved) in Water by ICPMS Method: AN318 Tested: 29/8/2019 (continued)

Cobalt, Co µg/L 1 13

Copper, Cu µg/L 1 3

Iron, Fe µg/L 5 <5

Lead, Pb µg/L 1 <1

Manganese, Mn µg/L 1 4

Molybdenum, Mo µg/L 0.5 4.0

Nickel, Ni µg/L 1 7

Selenium, Se µg/L 1 <1

Silver, Ag µg/L 1 <1

Strontium, Sr µg/L 1 57

Thallium, Tl µg/L 1 <1

Thorium, Th µg/L 1 <1

Tin, Sn µg/L 1 <1

Uranium, U µg/L 1 <1

Vanadium, V µg/L 1 1

Zinc, Zn µg/L 5 <5


Mercury µg/L 0.05 <0.05







Alkalinity Method: ME-(AU)-[ENV]AN135

MB

Bicarbonate Alkalinity as HCO3 LB163332 mg/L 1 <1


Reference

Cations in Water (Dissolved) by ICPOES Method: ME-(AU)-[ENV]AN020/AN320

MB DUP %RPD

Calcium, Ca LB163316 µg/L 10 <10 0%

Magnesium, Mg LB163316 µg/L 10 <10 0%

Potassium, K LB163316 µg/L 50 <50 1%

Sodium, Na LB163316 µg/L 50 <50 0%


Reference

Chloride by Discrete Analyser in Water Method: ME-(AU)-[ENV]AN274

MB DUP %RPD LCS

%Recovery

MS

%Recovery

Chloride, Cl LB163338 mg/L 1 <1 0% 106% 93 - 110%


Reference

Conductivity and TDS by Calculation - Water Method: ME-(AU)-[ENV]AN106

MB DUP %RPD LCS

%Recovery

Conductivity @ 25 C LB163331 µS/cm 2 <2 0 - 2% 99%


Reference

Fluoride by Ion Selective Electrode in Water Method: ME-(AU)-[ENV]AN141

MB DUP %RPD LCS

%Recovery

MS

%Recovery

Fluoride by ISE LB163354 mg/L 0.1 <0.1 3 - 22% 101% 90 - 94%


Reference

Mercury (dissolved) in Water Method: ME-(AU)-[ENV]AN311(Perth)/AN312

MB DUP %RPD LCS

%Recovery

MS

%Recovery

Mercury LB163317 µg/L 0.05 <0.00 29% 105% 102%


Reference







Metals in Water (Dissolved) by ICPOES Method: ME-(AU)-[ENV]AN320

MB LCS

%Recovery

Phosphorus, P LB163314 µg/L 50 <50 105%

Silicon, Si LB163314 µg/L 20 <20 101%

Sulfur, S LB163314 µg/L 100 <100 105%


Reference

pH in water Method: ME-(AU)-[ENV]AN101

MB DUP %RPD LCS

%Recovery

pH** LB163331 pH Units 0.1 5.6 - 5.7 0 - 1% 101%


Reference

Sulfate in water Method: ME-(AU)-[ENV]AN275

MB DUP %RPD LCS

%Recovery

MS

%Recovery

Sulfate, SO4 LB163338 mg/L 1 <1 0 - 3% 106 - 109% 97%


Reference

Trace Metals (Dissolved) in Water by ICPMS Method: ME-(AU)-[ENV]AN318

MB DUP %RPD LCS

%Recovery

MS

%Recovery

Aluminium, Al LB163301 µg/L 5 <5 120% 96%

Antimony, Sb LB163301 µg/L 1 <1 95% 95%

Arsenic, As LB163301 µg/L 1 <1 109% 75%

Barium, Ba LB163301 µg/L 0.2 <0.2 2% 102% 103%

Bismuth, Bi LB163301 µg/L 1 <1 91% 77%

Boron, B LB163301 µg/L 5 <5 113% 139%

Cadmium, Cd LB163301 µg/L 0.1 <0.1 110% 107%

Chromium, Cr LB163301 µg/L 1 <1 103% 103%

Cobalt, Co LB163301 µg/L 1 <1 105% 97%

Copper, Cu LB163301 µg/L 1 <1 112% 107%

Iron, Fe LB163301 µg/L 5 <5 96% 91%

Lead, Pb LB163301 µg/L 1 <1 106% 103%

Manganese, Mn LB163301 µg/L 1 <1 106% 105%

Molybdenum, Mo LB163301 µg/L 0.5 <0.5 101% 101%

Nickel, Ni LB163301 µg/L 1 <1 108% 104%

Selenium, Se LB163301 µg/L 1 <1 110% 108%

Silver, Ag LB163301 µg/L 1 <1 87% 123%

Strontium, Sr LB163301 µg/L 1 <1 8% 90% 70%

Thallium, Tl LB163301 µg/L 1 <1 95% 93%

Thorium, Th LB163301 µg/L 1 <1 96% 98%

Tin, Sn LB163301 µg/L 1 <1 97% 100%

Uranium, U LB163301 µg/L 1 <1 82% 84%

Vanadium, V LB163301 µg/L 1 <1 101% 100%

Zinc, Zn LB163301 µg/L 5 <5 110% 115%


Reference


PE137453 R0


METHOD SUMMARY

Dissolved Cations Low LOR by ICP-OES: Method is as per routine ICP OES method reporting a variation to the

method being lower limit of reporting (LOR) for selected cations as validated by the site. Referenced to APHA

3120B.

AN020/AN320 LL

pH in Soil Sludge Sediment and Water: pH is measured electrometrically using a combination electrode (glass plus

reference electrode) and is calibrated against 3 buffers purchased commercially. For soils, an extract with water is

made at a ratio of 1:5 and the pH determined and reported on the extract. Reference APHA 4500-H+.

AN101

Conductivity and TDS by Calculation: Conductivity is measured by meter with temperature compensation and is

calibrated against a standard solution of potassium chloride. Conductivity is generally reported as µmhos/cm or

µS/cm @ 25°C. For soils, an extract with water is made at a ratio of 1:5 and the EC determined and reported on

the extract, or calculated back to the as-received sample. Total Dissolved Salts can be estimated from conductivity

using a conversion factor, which for natural waters, is in the range 0.55 to 0.75. SGS use 0.6. Reference APHA

2510 B.

AN106

Salinity may be calculated in terms of NaCl from the sample conductivity. This assumes all soluble salts present,

measured by the conductivity, are present as NaCl.

AN106

Alkalinity (and forms of) by Titration: The sample is titrated with standard acid to pH 8.3 (P titre) and pH 4.5 (T titre)

and permanent and/or total alkalinity calculated. The results are expressed as equivalents of calcium carbonate or

recalculated as bicarbonate, carbonate and hydroxide. Reference APHA 2320. Internal Reference AN135

AN135

Determination of Fluoride by ISE: A fluoride ion selective electrode and reference electrode combination , in the

presence of a pH/complexation buffer, is used to determine the fluoride concentration. The electrode millivolt

response is measured logarithmically against fluoride concentration. Reference APHA F- C.

AN141

Chloride by Aquakem DA: Chloride reacts with mercuric thiocyanate forming a mercuric chloride complex. In the

presence of ferric iron, highly coloured ferric thiocyanate is formed which is proportional to the chloride

concentration. Reference APHA 4500Cl-

AN274

sulfate by Aquakem DA: sulfate is precipitated in an acidic medium with barium chloride. The resulting turbidity is

measured photometrically at 405nm and compared with standard calibration solutions to determine the sulfate

concentration in the sample. Reference APHA 4500-SO42-. Internal reference AN275.

AN275

Mercury by Cold Vapour AAS in Waters: Mercury ions are reduced by stannous chloride reagent in acidic solution

to elemental mercury. This mercury vapour is purged by nitrogen into a cold cell in an atomic absorption

spectrometer or mercury analyser. Quantification is made by comparing absorbances to those of the calibration

standards. Reference APHA 3112/3500.

AN311(Perth)/AN312

Determination of elements at trace level in waters by ICP-MS technique, in accordance with USEPA 6020A.AN318

Metals by ICP-OES: Samples are preserved with 10% nitric acid for a wide range of metals and some non-metals.

This solution is measured by Inductively Coupled Plasma. Solutions are aspirated into an argon plasma at

8000-10000K and emit characteristic energy or light as a result of electron transitions through unique energy

levels. The emitted light is focused onto a diffraction grating where it is separated into components .

AN320

Photomultipliers or CCDs are used to measure the light intensity at specific wavelengths. This intensity is directly

proportional to concentration. Corrections are required to compensate for spectral overlap between elements.

Reference APHA 3120 B.

AN320

Free and Total Carbon Dioxide may be calculated using alkalinity forms only when the samples TDS is <500mg/L.

If TDS is >500mg/L free or total carbon dioxide cannot be reported . APHA4500CO2 D.

Calculation


PE137453 R0

Unless it is reported that sampling has been performed by SGS, the samples have been analysed as received.

















11929.









IS

LNR

*

**






FOOTNOTES

LOR

↑↓

QFH

QFL

-

NVL

Limit of Reporting





Not Validated


GRAEME CAMPBELL & ASSOCIATES PTY LTD Specialists in … · 2021. 1. 4. · Graeme Campbell &...

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