2018 Annual Closure Report

Appendix J

2018 Old Camp Water Quality Results

900 - 606 4 Street SW, Calgary, AB, Canada, T2P 1T1 T 1.403.910.1933 F 1.403.910.1934 www.ddcorp.ca Dominion Diamond Ekati Corporation Date Received: 15-JUN-18 (DDEC) Report Date: 29-JUN-18 13:43 (MT) ATTN: David G. Bruce / Richard E. Ehlert Version: FINAL # 1102 - 4920 52nd Street Yellowknife NT X1A 3T1 Client Phone: 867-880-2157

Certificate of Analysis Lab Work Order #: L2113551 Project P.O. #: EKA 3002 PHASE 1 Job Reference: 75017 C of C Numbers: 75017 Legal Site Desc: 6204050324

______Can Dang Senior Account Manager [This report shall not be reproduced except in full without the written authority of the Laboratory.]

ADDRESS: 8081 Lougheed Hwy, Suite 100, Burnaby, BC V5A 1W9 Canada | Phone: +1 604 253 4188 | Fax: +1 604 253 6700 ALS CANADA LTD Part of the ALS Group An ALS Limited Company L2113551 CONTD.... PAGE 2 of 7 ALS ENVIRONMENTAL ANALYTICAL REPORT 29-JUN-18 13:43 (MT) Version: FINAL

Sample ID L2113551-1 L2113551-2 L2113551-3 L2113551-4 Description WATER WATER WATER WATER Sampled Date 13-JUN-18 13-JUN-18 13-JUN-18 13-JUN-18 Sampled Time 16:30 16:00 15:50 16:15 Client ID LARRY LAKE NORTH POND PHASE 1 TRENCH SOUTH POND

Grouping Analyte WATER

Physical Tests Conductivity (uS/cm) 45.8 212 65.9 191

Hardness (as CaCO3) (mg/L) 14.6 91.6 23.7 78.3

pH (pH) 7.29 7.86 7.32 7.93

Total Suspended Solids (mg/L) 4.0 10.8 4.0 13.8

Total Dissolved Solids (mg/L) 65 168 52 146

Turbidity (NTU) 0.83 7.04 6.08 10.1

Anions and Alkalinity, Total (as CaCO3) (mg/L) 11.3 69.9 12.5 65.0 Nutrients

Ammonia, Total (as N) (mg/L) <0.0050 0.441 <0.0050 0.358

Chloride (Cl) (mg/L) 0.51 0.72 <0.50 0.89

Fluoride (F) (mg/L) 0.030 0.072 0.042 0.068

Nitrate and Nitrite (as N) (mg/L) 0.0235 0.120 0.225 0.211

Nitrate (as N) (mg/L) 0.0235 0.110 0.224 0.192

Nitrite (as N) (mg/L) <0.0010 0.0100 0.0015 0.0194

Total Kjeldahl Nitrogen (mg/L) 0.352 1.21 0.179 1.09

Orthophosphate-Dissolved (as P) (mg/L) 0.0013 0.0053 0.0031 0.0084

Phosphorus (P)-Total Dissolved (mg/L) 0.0051 0.0186 0.0065 0.0207

Phosphorus (P)-Total (mg/L) 0.0071 0.0367 0.0111 0.0393 SFT SFT Silicate (as SiO2) (mg/L) 0.85 6.55 3.03 6.31

Sulfate (SO4) (mg/L) 7.76 35.3 14.6 28.5

Organic / Total Carbon (mg/L) 9.33 33.7 8.34 30.9 Inorganic Carbon

Total Inorganic Carbon (mg/L) 3.53 16.5 3.79 15.0

Total Organic Carbon (mg/L) 5.81 17.2 4.55 15.9

Total Metals Aluminum (Al)-Total (mg/L) 0.0379 0.0719 0.300 0.231

Antimony (Sb)-Total (mg/L) <0.00010 0.00014 <0.00010 <0.00010

Arsenic (As)-Total (mg/L) 0.00030 0.00422 0.00041 0.00407

Barium (Ba)-Total (mg/L) 0.00729 0.0487 0.0159 0.0505

Beryllium (Be)-Total (mg/L) <0.00010 <0.00010 <0.00010 <0.00010

Boron (B)-Total (mg/L) <0.010 0.012 <0.010 0.010

Cadmium (Cd)-Total (mg/L) <0.0000050 0.0000130 0.0000063 0.0000070

Calcium (Ca)-Total (mg/L) 2.62 23.5 5.67 17.8

Chromium (Cr)-Total (mg/L) 0.00021 0.00102 0.00078 0.00131

Cobalt (Co)-Total (mg/L) 0.00018 0.00109 0.00025 0.00201

Copper (Cu)-Total (mg/L) 0.00148 0.00474 0.00654 0.00445

Iron (Fe)-Total (mg/L) 0.209 2.88 0.307 3.14

Lead (Pb)-Total (mg/L) <0.000050 0.000089 0.000139 0.000158

Magnesium (Mg)-Total (mg/L) 1.95 6.57 2.07 6.90

* Please refer to the Reference Information section for an explanation of any qualifiers detected. L2113551 CONTD.... PAGE 3 of 7 ALS ENVIRONMENTAL ANALYTICAL REPORT 29-JUN-18 13:43 (MT) Version: FINAL

Grouping Analyte WATER

Total Metals Manganese (Mn)-Total (mg/L) 0.0266 0.179 0.00769 0.227

Mercury (Hg)-Total (mg/L) <0.0000050 <0.0000050 <0.0000050 <0.0000050

Molybdenum (Mo)-Total (mg/L) 0.000100 0.00248 0.000413 0.00185

Nickel (Ni)-Total (mg/L) 0.00202 0.00930 0.00338 0.0106

Potassium (K)-Total (mg/L) 1.75 5.57 2.88 4.85

Selenium (Se)-Total (mg/L) <0.000050 0.000194 0.000122 0.000102

Silicon (Si)-Total (mg/L) 0.48 3.38 1.99 3.62

Silver (Ag)-Total (mg/L) <0.000010 <0.000010 <0.000010 0.000011

Sodium (Na)-Total (mg/L) 2.26 6.91 2.30 7.98

Strontium (Sr)-Total (mg/L) 0.0219 0.150 0.0352 0.147

Uranium (U)-Total (mg/L) 0.000075 0.00677 0.000607 0.00277

Vanadium (V)-Total (mg/L) <0.00050 0.00101 0.00068 0.00127

Zinc (Zn)-Total (mg/L) <0.0030 <0.0030 <0.0030 <0.0030

Dissolved Metals Dissolved Mercury Filtration Location LAB LAB LAB LAB

Dissolved Metals Filtration Location LAB LAB LAB LAB

Aluminum (Al)-Dissolved (mg/L) 0.0138 0.0357 0.0749 0.0544

Antimony (Sb)-Dissolved (mg/L) <0.00010 0.00014 <0.00010 <0.00010

Arsenic (As)-Dissolved (mg/L) 0.00027 0.00349 0.00030 0.00345

Barium (Ba)-Dissolved (mg/L) 0.00737 0.0478 0.0145 0.0490

Beryllium (Be)-Dissolved (mg/L) <0.00010 <0.00010 <0.00010 <0.00010

Boron (B)-Dissolved (mg/L) <0.010 0.013 <0.010 0.012

Cadmium (Cd)-Dissolved (mg/L) <0.0000050 <0.0000050 <0.0000050 <0.0000050

Calcium (Ca)-Dissolved (mg/L) 2.69 25.3 6.33 19.5 DLB DLB Chromium (Cr)-Dissolved (mg/L) <0.00015 0.00067 <0.00025 0.00070

Cobalt (Co)-Dissolved (mg/L) <0.00010 0.00025 <0.00010 0.00023

Copper (Cu)-Dissolved (mg/L) 0.00130 0.00432 0.00551 0.00385

Iron (Fe)-Dissolved (mg/L) 0.046 1.98 0.075 2.22

Lead (Pb)-Dissolved (mg/L) <0.000050 0.000057 0.000053 0.000075

Magnesium (Mg)-Dissolved (mg/L) 1.92 6.92 1.91 7.17

Manganese (Mn)-Dissolved (mg/L) 0.00074 0.00117 0.00249 0.00209

Mercury (Hg)-Dissolved (mg/L) <0.0000050 <0.0000050 <0.0000050 <0.0000050

Molybdenum (Mo)-Dissolved (mg/L) 0.000087 0.00241 0.000399 0.00188

Nickel (Ni)-Dissolved (mg/L) 0.00183 0.00781 0.00245 0.00861

Potassium (K)-Dissolved (mg/L) 1.89 6.42 3.07 5.53

Selenium (Se)-Dissolved (mg/L) <0.000050 0.000223 0.000111 0.000133

Silicon (Si)-Dissolved (mg/L) 0.432 3.32 1.55 3.27

Silver (Ag)-Dissolved (mg/L) <0.000010 <0.000010 <0.000010 <0.000010

* Please refer to the Reference Information section for an explanation of any qualifiers detected. L2113551 CONTD.... PAGE 4 of 7 ALS ENVIRONMENTAL ANALYTICAL REPORT 29-JUN-18 13:43 (MT) Version: FINAL

Grouping Analyte WATER

Dissolved Metals Sodium (Na)-Dissolved (mg/L) 2.45 7.64 2.47 8.95

Strontium (Sr)-Dissolved (mg/L) 0.0220 0.160 0.0388 0.159

Uranium (U)-Dissolved (mg/L) 0.000061 0.00587 0.000523 0.00250

Vanadium (V)-Dissolved (mg/L) <0.00050 0.00062 <0.00050 0.00066

Zinc (Zn)-Dissolved (mg/L) <0.0010 <0.0010 <0.0010 <0.0010

Volatile Organic Benzene (mg/L) <0.00050 <0.00050 <0.00050 <0.00050 Compounds

Ethylbenzene (mg/L) <0.00050 <0.00050 <0.00050 <0.00050

Styrene (mg/L) <0.00050 <0.00050 <0.00050 <0.00050

Toluene (mg/L) <0.00050 0.00290 <0.00050 <0.00050

ortho-Xylene (mg/L) <0.00050 <0.00050 <0.00050 <0.00050

meta- & para-Xylene (mg/L) <0.00050 <0.00050 <0.00050 <0.00050

Xylenes (mg/L) <0.00075 <0.00075 <0.00075 <0.00075

Surrogate: 4-Bromofluorobenzene (SS) (%) 93.0 84.0 97.5 95.2

Surrogate: 1,4-Difluorobenzene (SS) (%) 89.5 92.2 92.4 96.0

Hydrocarbons TVH (C5-C10) (mg/L) <0.10 <0.10 <0.10 <0.10

TEH10-30 (mg/L) <0.10 0.15 <0.10 <0.10

TPH5-30 (mg/L) <0.25 <0.25 <0.25 <0.25

Surrogate: 2-Bromobenzotrifluoride (%) 113.0 84.0 123.7 100.1

* Please refer to the Reference Information section for an explanation of any qualifiers detected. L2113551 CONTD.... PAGE 5 of 7 29-JUN-18 13:43 (MT) Reference Information Version: FINAL QC Samples with Qualifiers & Comments:

QC Type Description Parameter Qualifier Applies to Sample Number(s) Method Blank Manganese (Mn)-Total B L2113551-1, -2, -3, -4 Method Blank Chromium (Cr)-Dissolved MB-LOR L2113551-1, -2, -3, -4 Method Blank Sodium (Na)-Dissolved MB-LOR L2113551-1, -2, -3, -4 Matrix Spike Total Inorganic Carbon MS-B L2113551-1, -2, -3, -4 Matrix Spike Total Organic Carbon MS-B L2113551-1, -2, -3, -4 Matrix Spike Barium (Ba)-Dissolved MS-B L2113551-1, -2, -3, -4 Matrix Spike Calcium (Ca)-Dissolved MS-B L2113551-1, -2, -3, -4 Matrix Spike Magnesium (Mg)-Dissolved MS-B L2113551-1, -2, -3, -4 Matrix Spike Strontium (Sr)-Dissolved MS-B L2113551-1, -2, -3, -4 Matrix Spike Aluminum (Al)-Total MS-B L2113551-1, -2, -3, -4 Matrix Spike Barium (Ba)-Total MS-B L2113551-1, -2, -3, -4 Matrix Spike Calcium (Ca)-Total MS-B L2113551-1, -2, -3, -4 Matrix Spike Iron (Fe)-Total MS-B L2113551-1, -2, -3, -4 Matrix Spike Magnesium (Mg)-Total MS-B L2113551-1, -2, -3, -4 Matrix Spike Manganese (Mn)-Total MS-B L2113551-1, -2, -3, -4 Matrix Spike Strontium (Sr)-Total MS-B L2113551-1, -2, -3, -4

Qualifiers for Individual Parameters Listed: Qualifier Description

B Method Blank exceeds ALS DQO. Associated sample results which are < Limit of Reporting or > 5 times blank level are considered reliable. DLB Detection Limit Raised. Analyte detected at comparable level in Method Blank. MB-LOR Method Blank exceeds ALS DQO. Limits of Reporting have been adjusted for samples with positive hits below 5x blank level. MS-B Matrix Spike recovery could not be accurately calculated due to high analyte background in sample. SFT Sample was filtered due to turbidity interference. Result reflects soluble analyte concentration.

Test Method References: ALS Test Code Matrix Test Description Method Reference**

ALK-TITR-VA Water Alkalinity Species by Titration APHA 2320 Alkalinity This analysis is carried out using procedures adapted from APHA Method 2320 "Alkalinity". Total alkalinity is determined by potentiometric titration to a pH 4.5 endpoint. Bicarbonate, carbonate and hydroxide alkalinity are calculated from phenolphthalein alkalinity and total alkalinity values. ANIONS-N+N-CALC-VA Water Nitrite & Nitrate in Water (Calculation) EPA 300.0 Nitrate and Nitrite (as N) is a calculated parameter. Nitrate and Nitrite (as N) = Nitrite (as N) + Nitrate (as N).

CARBONS-TC-CALC-VA Water Tot. Carbon in Water by Calc. (TOC+TIC) APHA 5310B Total carbon is calculated by additional of Total Organic Carbon and Total Inorganic Carbon concentrations.

CARBONS-TIC-VA Water Total inorganic carbon by CO2 purge APHA 5310B TOTAL ORGANIC CARBON (TOC) This analysis is carried out using procedures adapted from APHA Method 5310 "Total Organic Carbon (TOC)".

CARBONS-TOC-VA Water Total organic carbon by combustion APHA 5310B TOTAL ORGANIC CARBON (TOC) This analysis is carried out using procedures adapted from APHA Method 5310 "Total Organic Carbon (TOC)".

CL-IC-N-VA Water Chloride in Water by IC EPA 300.1 (mod) Inorganic anions are analyzed by Ion Chromatography with conductivity and/or UV detection.

EC-PCT-VA Water Conductivity (Automated) APHA 2510 Auto. Conduc. This analysis is carried out using procedures adapted from APHA Method 2510 "Conductivity". Conductivity is determined using a conductivity electrode. EC-SCREEN-VA Water Conductivity Screen (Internal Use Only) APHA 2510 Qualitative analysis of conductivity where required during preparation of other tests - e.g. TDS, metals, etc.

EPH-L-ME-FID-VA Water EPH in Water (Low Level) BC Lab Manual EPH is extracted from water using a hexane micro-extraction technique, with analysis by GC-FID, as per the BC Lab Manual. EPH results include PAHs and are therefore not equivalent to LEPH or HEPH. L2113551 CONTD.... PAGE 6 of 7 29-JUN-18 13:43 (MT) Reference Information Version: FINAL

F-IC-N-VA Water Fluoride in Water by IC EPA 300.1 (mod) Inorganic anions are analyzed by Ion Chromatography with conductivity and/or UV detection.

HARDNESS-CALC-VA Water Hardness APHA 2340B Hardness (also known as Total Hardness) is calculated from the sum of Calcium and Magnesium concentrations, expressed in CaCO3 equivalents. Dissolved Calcium and Magnesium concentrations are preferentially used for the hardness calculation. HG-D-CVAA-VA Water Diss. Mercury in Water by CVAAS or CVAFS APHA 3030B/EPA 1631E (mod) Water samples are filtered (0.45 um), preserved with hydrochloric acid, then undergo a cold-oxidation using bromine monochloride prior to reduction with stannous chloride, and analyzed by CVAAS or CVAFS. HG-T-CVAA-VA Water Total Mercury in Water by CVAAS or CVAFS EPA 1631E (mod) Water samples undergo a cold-oxidation using bromine monochloride prior to reduction with stannous chloride, and analyzed by CVAAS or CVAFS.

MET-D-CCMS-VA Water Dissolved Metals in Water by CRC ICPMS APHA 3030B/6020A (mod) Water samples are filtered (0.45 um), preserved with nitric acid, and analyzed by CRC ICPMS.

Method Limitation (re: Sulfur): Sulfide and volatile sulfur species may not be recovered by this method.

MET-T-CCMS-VA Water Total Metals in Water by CRC ICPMS EPA 200.2/6020A (mod) Water samples are digested with nitric and hydrochloric acids, and analyzed by CRC ICPMS.

Method Limitation (re: Sulfur): Sulfide and volatile sulfur species may not be recovered by this method.

NH3-F-VA Water Ammonia in Water by Fluorescence J. ENVIRON. MONIT., 2005, 7, 37-42, RSC This analysis is carried out, on sulfuric acid preserved samples, using procedures modified from J. Environ. Monit., 2005, 7, 37 - 42, The Royal Society of Chemistry, "Flow-injection analysis with fluorescence detection for the determination of trace levels of ammonium in seawater", Roslyn J. Waston et al. NO2-L-IC-N-VA Water Nitrite in Water by IC (Low Level) EPA 300.1 (mod) Inorganic anions are analyzed by Ion Chromatography with conductivity and/or UV detection.

NO3-L-IC-N-VA Water Nitrate in Water by IC (Low Level) EPA 300.1 (mod) Inorganic anions are analyzed by Ion Chromatography with conductivity and/or UV detection.

P-T-PRES-COL-VA Water Total P in Water by Colour APHA 4500-P Phosphorus This analysis is carried out using procedures adapted from APHA Method 4500-P "Phosphorus". Total Phosphorus is determined colourimetrically after persulphate digestion of the sample. Samples with very high dissolved solids (i.e. seawaters, brackish waters) may produce a negative bias by this method. Alternate methods are available for these types of samples.

Arsenic (5+), at elevated levels, is a positive interference on colourimetric phosphate analysis. P-TD-COL-VA Water Total Dissolved P in Water by Colour APHA 4500-P Phosphorous This analysis is carried out using procedures adapted from APHA Method 4500-P "Phosphorus". Total Dissolved Phosphorus is determined colourimetrically after persulphate digestion of a sample that has been lab or field filtered through a 0.45 micron membrane filter. Samples with very high dissolved solids (i.e. seawaters, brackish waters) may produce a negative bias by this method. Alternate methods are available for these types of samples.

Arsenic (5+), at elevated levels, is a positive interference on colourimetric phosphate analysis. PH-PCT-VA Water pH by Meter (Automated) APHA 4500-H pH Value This analysis is carried out using procedures adapted from APHA Method 4500-H "pH Value". The pH is determined in the laboratory using a pH electrode

It is recommended that this analysis be conducted in the field. PO4-DO-COL-VA Water Diss. Orthophosphate in Water by Colour APHA 4500-P Phosphorus This analysis is carried out using procedures adapted from APHA Method 4500-P "Phosphorus". Dissolved Orthophosphate is determined colourimetrically on a sample that has been lab or field filtered through a 0.45 micron membrane filter. Samples with very high dissolved solids (i.e. seawaters, brackish waters) may produce a negative bias by this method. Alternate methods are available for these types of samples.

Arsenic (5+), at elevated levels, is a positive interference on colourimetric phosphate analysis. SILICATE-COL-VA Water Silicate by Colourimetric analysis APHA 4500-SiO2 E. This analysis is carried out using procedures adapted from APHA Method 4500-SiO2 E. "Silica". Silicate (molybdate-reactive silica) is determined by the molybdosilicate-heteropoly blue colourimetric method. L2113551 CONTD.... PAGE 7 of 7 29-JUN-18 13:43 (MT) Reference Information Version: FINAL

SO4-IC-N-VA Water Sulfate in Water by IC EPA 300.1 (mod) Inorganic anions are analyzed by Ion Chromatography with conductivity and/or UV detection.

TDS-VA Water Total Dissolved Solids by Gravimetric APHA 2540 C - GRAVIMETRIC This analysis is carried out using procedures adapted from APHA Method 2540 "Solids". Solids are determined gravimetrically. Total Dissolved Solids (TDS) are determined by filtering a sample through a glass fibre filter, TDS is determined by evaporating the filtrate to dryness at 180 degrees celsius. TKN-F-VA Water TKN in Water by Fluorescence APHA 4500-NORG D. This analysis is carried out using procedures adapted from APHA Method 4500-Norg D. "Block Digestion and Flow Injection Analysis". Total Kjeldahl Nitrogen is determined using block digestion followed by Flow-injection analysis with fluorescence detection. TPH-5-30-CALC-VA Water Calculation of TPH 5-30 Calculation "TPH5-30 is the sum of TVH(C5-C10) and TEH(10-30) analyses. Neither test involves silica gel treatment. Refer to those methodologies for details of analysis." TSS-VA Water Total Suspended Solids by Gravimetric APHA 2540 D - GRAVIMETRIC This analysis is carried out using procedures adapted from APHA Method 2540 "Solids". Solids are determined gravimetrically. Total Suspended Solids (TSS) are determined by filtering a sample through a glass fibre filter, TSS is determined by drying the filter at 104 degrees celsius. Samples containing very high dissolved solid content (i.e. seawaters, brackish waters) may produce a positive bias by this method. Alternate analysis methods are available for these types of samples. TURBIDITY-VA Water Turbidity by Meter APHA 2130 Turbidity This analysis is carried out using procedures adapted from APHA Method 2130 "Turbidity". Turbidity is determined by the nephelometric method.

TVH-HSFID-VA Water TVH by headspace GCFID EPA 8260B, BCMELP CSR METHOD This procedure involves the headspace extraction of the sample prior to analysis for Volatile Hydrocarbons (VH) by capillary column gas chromatography with flame-ionization detection (GC/FID). The VH analysis is carried out in accordance with the British Columbia Ministry of Environment, Lands and Parks (BCMELP) Analytical Method for Contaminated Sites "Volatile Hydrocarbons in Water by GC/FID" (Version 2.1, July 1999). VOC7-HSMS-VA Water BTEX/MTBE/Styrene by Headspace GCMS EPA 5021A/8260C The water sample, with added reagents, is heated in a sealed vial to equilibrium. The headspace from the vial is transfered into a gas chromatograph. Target compound concentrations are measured using mass spectrometry detection. VOC7/VOC-SURR-MS-VA Water VOC7 and/or VOC Surrogates for Waters EPA 5035A/5021A/8260C XYLENES-CALC-VA Water Sum of Xylene Isomer Concentrations CALCULATION Calculation of Total Xylenes

Total Xylenes is the sum of the concentrations of the ortho, meta, and para Xylene isomers. Results below detection limit (DL) are treated as zero. The DL for Total Xylenes is set to a value no less than the square root of the sum of the squares of the DLs of the individual Xylenes.

** ALS test methods may incorporate modifications from specified reference methods to improve performance. The last two letters of the above test code(s) indicate the laboratory that performed analytical analysis for that test. Refer to the list below:

Laboratory Definition Code Laboratory Location VA ALS ENVIRONMENTAL - VANCOUVER, BRITISH COLUMBIA, CANADA

Chain of Custody Numbers:

75017

GLOSSARY OF REPORT TERMS Surrogate - A compound that is similar in behaviour to target analyte(s), but that does not occur naturally in environmental samples. For applicable tests, surrogates are added to samples prior to analysis as a check on recovery. mg/kg - milligrams per kilogram based on dry weight of sample. mg/kg wwt - milligrams per kilogram based on wet weight of sample. mg/kg lwt - milligrams per kilogram based on lipid-adjusted weight of sample. mg/L - milligrams per litre. < - Less than. D.L. - The reported Detection Limit, also known as the Limit of Reporting (LOR). N/A - Result not available. Refer to qualifier code and definition for explanation.

Test results reported relate only to the samples as received by the laboratory. UNLESS OTHERWISE STATED, ALL SAMPLES WERE RECEIVED IN ACCEPTABLE CONDITION. Analytical results in unsigned test reports with the DRAFT watermark are subject to change, pending final QC review. ALS Sample ID: L2113551-L-1 Client Sample ID: LARRY LAKE 500

450

400

350

300 R e s p o n s e

250 M i l l i V o l t s 200

150

100

0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 Time - Minutes

The BC EPH Hydrocarbon Distribution Report (HDR) is intended to assist you in characterizing hydrocarbon products that may be present in your sample.

The scale at the bottom of the chromatogram indicates the approximate retention times of common petroleum products and three n-alkane hydrocarbon marker compounds. Retention times may vary between samples, but general patterns and distributions will remain similar.

Peak heights in this report are a function of the sample concentration, the sample amount extracted, the sample dilution factor, and the scale at left.

A "-L-" in the sample ID denotes a low level sample. A "-S-" denotes a silica gel cleaned sample.

Note: This chromatogram was produced using GC conditions that are specific to the ALS Canada EPH method. Refer to the ALS Canada EPH Hydrocarbon Library for a collection of chromatograms from common reference samples (fuels, oils, etc.). The HDR library can be found at www.alsglobal.com.

Printed on 6/26/2018 11:44:02 AM Page 1 of 1 ALS Sample ID: L2113551-L-2 Client Sample ID: NORTH POND 500

450

400

350

300 R e s p o n s e

250 M i l l i V o l t s 200

150

100

0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 Time - Minutes

The BC EPH Hydrocarbon Distribution Report (HDR) is intended to assist you in characterizing hydrocarbon products that may be present in your sample.

Peak heights in this report are a function of the sample concentration, the sample amount extracted, the sample dilution factor, and the scale at left.

A "-L-" in the sample ID denotes a low level sample. A "-S-" denotes a silica gel cleaned sample.

Printed on 6/26/2018 11:44:06 AM Page 1 of 1 ALS Sample ID: L2113551-L-3 Client Sample ID: PHASE 1 TRENCH 500

450

400

350

300 R e s p o n s e

250 M i l l i V o l t s 200

150

100

0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 Time - Minutes

The BC EPH Hydrocarbon Distribution Report (HDR) is intended to assist you in characterizing hydrocarbon products that may be present in your sample.

Peak heights in this report are a function of the sample concentration, the sample amount extracted, the sample dilution factor, and the scale at left.

A "-L-" in the sample ID denotes a low level sample. A "-S-" denotes a silica gel cleaned sample.

Printed on 6/26/2018 11:44:10 AM Page 1 of 1 ALS Sample ID: L2113551-L-4 Client Sample ID: SOUTH POND 500

450

400

350

300 R e s p o n s e

250 M i l l i V o l t s 200

150

100

0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 Time - Minutes

The BC EPH Hydrocarbon Distribution Report (HDR) is intended to assist you in characterizing hydrocarbon products that may be present in your sample.

Peak heights in this report are a function of the sample concentration, the sample amount extracted, the sample dilution factor, and the scale at left.

A "-L-" in the sample ID denotes a low level sample. A "-S-" denotes a silica gel cleaned sample.

Printed on 6/26/2018 11:44:14 AM Page 1 of 1

Your Project #: 1214-15848 Your C.O.C. #: 1 of 1

Attention: Reid Smith STANTEC CONSULTING LTD 40 HIGHFIELD PARK DRIVE SUITE 102 DARTMOUTH, NS CANADA B3A 0A3 Report Date: 2018/09/19 Report #: R2621833 Version: 1 - Final

CERTIFICATE OF ANALYSIS MAXXAM JOB #: B878290 Received: 2018/09/12, 16:15 Sample Matrix: Water # Samples Received: 8 Date Date Analyses Quantity Extracted Analyzed Laboratory Method Analytical Method Alkalinity @25C (pp, total), CO3,HCO3,OH 8 N/A 2018/09/14 AB SOP-00005 SM 23 2320 B m BTEX/F1 in Water by HS GC/MS/FID 3 N/A 2018/09/14 AB SOP-00039 CCME CWS/EPA 8260d m F1-BTEX 3 N/A 2018/09/15 AB SOP-00039 Auto Calc Chloride by Automated Colourimetry 1 N/A 2018/09/14 AB SOP-00020 SM 22 4500-Cl-E m Chloride by Automated Colourimetry 7 N/A 2018/09/15 AB SOP-00020 SM 22 4500-Cl-E m Conductivity @25C 8 N/A 2018/09/14 AB SOP-00005 SM 23 2510 B m CCME Hydrocarbons (F2-F4 in water) (1) 3 2018/09/14 2018/09/15 AB SOP-00037 / AB SOP- CCME PHC-CWS m 00040 Hardness 7 N/A 2018/09/14 AB WI-00065 Auto Calc Hardness 1 N/A 2018/09/15 AB WI-00065 Auto Calc Elements by ICP - Dissolved (2) 7 N/A 2018/09/14 AB SOP-00042 EPA 6010d R4 m Elements by ICP-Dissolved-Lab Filtered (2) 1 N/A 2018/09/14 AB SOP-00042 EPA 6010d R4 m Elements by ICP - Total 8 2018/09/14 2018/09/14 AB SOP-00014 / AB SOP- EPA 6010d R4 m 00042 Elements by ICPMS - Dissolved (2) 4 N/A 2018/09/14 AB SOP-00043 EPA 6020b R2 m Elements by ICPMS - Dissolved (2) 3 N/A 2018/09/18 AB SOP-00043 EPA 6020b R2 m Elements by ICPMS-Dissolved-Lab Filtered (3) 1 N/A 2018/09/17 AB SOP-00043 EPA 6020b R2 m Elements by ICPMS - Total 8 2018/09/14 2018/09/14 AB SOP-00014 / AB SOP- EPA 6020b R2 m 00043 Ion Balance 8 N/A 2018/09/14 AB WI-00065 Auto Calc Sum of cations, anions 7 N/A 2018/09/14 AB WI-00065 Auto Calc Sum of cations, anions 1 N/A 2018/09/15 AB WI-00065 Auto Calc Nitrate and Nitrite 8 N/A 2018/09/16 AB WI-00065 Auto Calc Nitrate (as N) 8 2018/09/13 2018/09/16 AB WI-00065 Auto Calc NO2 - NO2 + NO3 (N) by CFA 8 N/A 2018/09/16 AB SOP-00082 IM 857-871m pH @25°C (4) 8 N/A 2018/09/14 AB SOP-00005 SM 23 4500 H+ B m Sulphate by Automated Colourimetry 1 N/A 2018/09/14 AB SOP-00018 SM 22 4500-SO4 E m Sulphate by Automated Colourimetry 7 N/A 2018/09/15 AB SOP-00018 SM 22 4500-SO4 E m Total Hydrocarbons C6-C50 in Water (5) 3 N/A 2018/09/19 AB SOP-00039 Auto Calc Total Dissolved Solids (Calculated) 8 N/A 2018/09/17 AB WI-00065 Auto Calc

Page 1 of 26 Maxxam Analytics International Corporation o/a Maxxam Analytics Edmonton: 9331 - 48th Street T6B 2R4 Telephone (780)577-7100 Fax (780)450-4187 Your Project #: 1214-15848 Your C.O.C. #: 1 of 1

Attention: Reid Smith STANTEC CONSULTING LTD 40 HIGHFIELD PARK DRIVE SUITE 102 DARTMOUTH, NS CANADA B3A 0A3 Report Date: 2018/09/19 Report #: R2621833 Version: 1 - Final

CERTIFICATE OF ANALYSIS MAXXAM JOB #: B878290 Received: 2018/09/12, 16:15 Remarks: Maxxam Analytics' laboratories are accredited to ISO/IEC 17025:2005 for specific parameters on scopes of accreditation. Unless otherwise noted, procedures used by Maxxam are based upon recognized Provincial, Federal or US method compendia such as CCME, MDDELCC, EPA, APHA.

All work recorded herein has been done in accordance with procedures and practices ordinarily exercised by professionals in Maxxam’s profession using accepted testing methodologies, quality assurance and quality control procedures (except where otherwise agreed by the client and Maxxam in writing). All data is in statistical control and has met quality control and method performance criteria unless otherwise noted. All method blanks are reported; unless indicated otherwise, associated sample data are not blank corrected. Where applicable, unless otherwise noted, Measurement Uncertainty has not been accounted for when stating conformity to the referenced standard.

Maxxam Analytics' liability is limited to the actual cost of the requested analyses, unless otherwise agreed in writing. There is no other warranty expressed or implied. Maxxam has been retained to provide analysis of samples provided by the Client using the testing methodology referenced in this report. Interpretation and use of test results are the sole responsibility of the Client and are not within the scope of services provided by Maxxam, unless otherwise agreed in writing. Maxxam is not responsible for the accuracy or any data impacts, that result from the information provided by the customer or their agent.

Solid sample results, except biota, are based on dry weight unless otherwise indicated. Organic analyses are not recovery corrected except for isotope dilution methods. Results relate to samples tested. When sampling is not conducted by Maxxam, results relate to the supplied samples tested. This Certificate shall not be reproduced except in full, without the written approval of the laboratory. Reference Method suffix “m” indicates test methods incorporate validated modifications from specific reference methods to improve performance. * RPDs calculated using raw data. The rounding of final results may result in the apparent difference. (1) Silica gel clean up employed. (2) Dissolved > Total Imbalance: When applicable, Dissolved and Total results were reviewed and data quality meets acceptable levels unless otherwise noted. (3) Samples were filtered and preserved at the lab. Values may not reflect concentrations at the time of sampling. Dissolved > Total Imbalance: When applicable, Dissolved and Total results were reviewed and data quality meets acceptable levels unless otherwise noted. (4) The CCME method requires pH to be analysed within 15 minutes of sampling and therefore field analysis is required for compliance. All Laboratory pH analyses in this report are reported past the CCME holding time. Maxxam endeavours to analyze samples as soon as possible after receipt. (5) Total Hydrocarbons C6-C50 calculated as a sum of CCME PHC fractions 1-4.

Encryption Key

Please direct all questions regarding this Certificate of Analysis to your Project Manager. Geraldlyn Gouthro, Client Service Specialist Email: [email protected] Phone# (403)735-2230 ======This report has been generated and distributed using a secure automated process.

Page 2 of 26 Maxxam Analytics International Corporation o/a Maxxam Analytics Edmonton: 9331 - 48th Street T6B 2R4 Telephone (780)577-7100 Fax (780)450-4187 Your Project #: 1214-15848 Your C.O.C. #: 1 of 1

Attention: Reid Smith STANTEC CONSULTING LTD 40 HIGHFIELD PARK DRIVE SUITE 102 DARTMOUTH, NS CANADA B3A 0A3 Report Date: 2018/09/19 Report #: R2621833 Version: 1 - Final

CERTIFICATE OF ANALYSIS MAXXAM JOB #: B878290 ThisReceived: report has2018/09/12, been generated 16:15 and distributed using a secure automated process. Maxxam has procedures in place to guard against improper use of the electronic signature and have the required "signatories", as per section 5.10.2 of ISO/IEC 17025:2005(E), signing the reports. For Service Group specific validation please refer to the Validation Signature Page.

Total Cover Pages : 3 Page 3 of 26 Maxxam Analytics International Corporation o/a Maxxam Analytics Edmonton: 9331 - 48th Street T6B 2R4 Telephone (780)577-7100 Fax (780)450-4187 Maxxam Job #: B878290 STANTEC CONSULTING LTD Report Date: 2018/09/19 Client Project #: 1214-15848 Sampler Initials: BW AT1 BTEX AND F1-F4 IN WATER (WATER) Maxxam ID UH3068 UH3069 UH3074 Sampling Date 2018/09/10 2018/09/10 2018/09/10 COC Number 1 of 1 1 of 1 1 of 1 LARRY LAKE LARRY LAKE UNITS DUP 1 RDL QC Batch NORTH SOUTH Ext. Pet. Hydrocarbon F2 (C10-C16 Hydrocarbons) mg/L <0.10 <0.10 <0.10 0.10 9142522 F3 (C16-C34 Hydrocarbons) mg/L <0.10 <0.10 <0.10 0.10 9142522 F4 (C34-C50 Hydrocarbons) mg/L <0.20 <0.20 <0.20 0.20 9142522 Volatiles Benzene ug/L 1.9 0.68 0.74 0.40 9142596 Toluene ug/L <0.40 <0.40 <0.40 0.40 9142596 Ethylbenzene ug/L <0.40 <0.40 <0.40 0.40 9142596 m & p-Xylene ug/L <0.80 <0.80 <0.80 0.80 9142596 o-Xylene ug/L <0.40 <0.40 <0.40 0.40 9142596 Xylenes (Total) ug/L <0.89 <0.89 <0.89 0.89 9142000 F1 (C6-C10) - BTEX ug/L <100 <100 <100 100 9142000 F1 (C6-C10) ug/L <100 <100 <100 100 9142596 Surrogate Recovery (%) 1,4-Difluorobenzene (sur.) % 98 100 98 N/A 9142596 4-Bromofluorobenzene (sur.) % 102 101 100 N/A 9142596 D4-1,2-Dichloroethane (sur.) % 103 102 101 N/A 9142596 O-TERPHENYL (sur.) % 106 101 107 N/A 9142522 RDL = Reportable Detection Limit N/A = Not Applicable

Page 4 of 26 Maxxam Analytics International Corporation o/a Maxxam Analytics Edmonton: 9331 - 48th Street T6B 2R4 Telephone (780)577-7100 Fax (780)450-4187 Maxxam Job #: B878290 STANTEC CONSULTING LTD Report Date: 2018/09/19 Client Project #: 1214-15848 Sampler Initials: BW ROUTINE WATER & DISS. REGULATED METALS (WATER) Maxxam ID UH3067 UH3067 UH3068 Sampling Date 2018/09/09 2018/09/09 2018/09/10 COC Number 1 of 1 1 of 1 1 of 1 PHASE 1 PHASE 1 LARRY LAKE UNITS TRENCH QC Batch RDL QC Batch TRENCH NORTH Lab-Dup Calculated Parameters Anion Sum meq/L 1.4 N/A 9141728 0.41 N/A 9141728 Cation Sum meq/L 1.5 N/A 9141728 0.46 N/A 9141728 Hardness (CaCO3) mg/L 43 N/A 9142003 15 0.50 9142003 Ion Balance (% Difference) % 4.5 N/A 9142004 5.3 N/A 9142004 Dissolved Nitrate (N) mg/L 0.77 N/A 9141848 <0.020 0.020 9141848 Dissolved Nitrate (NO3) mg/L 3.4 N/A 9142165 <0.089 0.089 9142165 Dissolved Nitrite (NO2) mg/L <0.033 N/A 9142165 <0.033 0.033 9142165 Calculated Total Dissolved Solids mg/L 87 N/A 9141729 25 0.022 9141729 Misc. Inorganics Conductivity uS/cm 150 150 9143624 49 2.0 9143636 pH pH 7.07 7.07 9143616 7.13 N/A 9143631 Anions Alkalinity (PP as CaCO3) mg/L <1.0 <1.0 9143622 <1.0 1.0 9143635 Alkalinity (Total as CaCO3) mg/L 29 31 9143622 12 1.0 9143635 Bicarbonate (HCO3) mg/L 36 37 9143622 14 1.0 9143635 Carbonate (CO3) mg/L <1.0 <1.0 9143622 <1.0 1.0 9143635 Hydroxide (OH) mg/L <1.0 <1.0 9143622 <1.0 1.0 9143635 Dissolved Sulphate (SO4) mg/L 33 N/A 9142644 8.4 1.0 9143626 Dissolved Chloride (Cl) mg/L 1.1 N/A 9142643 <1.0 1.0 9143581 Nutrients Dissolved Nitrite (N) mg/L <0.010 <0.010 9145097 <0.010 0.010 9145097 Dissolved Nitrate plus Nitrite (N) mg/L 0.77 0.76 9145097 <0.020 0.020 9145097 Elements Dissolved Aluminum (Al) mg/L 0.20 0.20 9142824 0.011 0.0030 9142824 Dissolved Antimony (Sb) mg/L <0.00060 <0.00060 9142824 <0.00060 0.00060 9142824 Dissolved Arsenic (As) mg/L 0.0024 0.0022 9142824 0.00036 0.00020 9142824 Dissolved Barium (Ba) mg/L 0.028 0.028 9142756 <0.010 0.010 9142756 Dissolved Beryllium (Be) mg/L <0.0010 <0.0010 9142824 <0.0010 0.0010 9142824 Dissolved Boron (B) mg/L <0.020 <0.020 9142756 <0.020 0.020 9142756 Dissolved Cadmium (Cd) mg/L <0.000020 <0.000020 9142824 <0.000020 0.000020 9142824 RDL = Reportable Detection Limit Lab-Dup = Laboratory Initiated Duplicate N/A = Not Applicable

Page 5 of 26 Maxxam Analytics International Corporation o/a Maxxam Analytics Edmonton: 9331 - 48th Street T6B 2R4 Telephone (780)577-7100 Fax (780)450-4187 Maxxam Job #: B878290 STANTEC CONSULTING LTD Report Date: 2018/09/19 Client Project #: 1214-15848 Sampler Initials: BW ROUTINE WATER & DISS. REGULATED METALS (WATER) Maxxam ID UH3067 UH3067 UH3068 Sampling Date 2018/09/09 2018/09/09 2018/09/10 COC Number 1 of 1 1 of 1 1 of 1 PHASE 1 PHASE 1 LARRY LAKE UNITS TRENCH QC Batch RDL QC Batch TRENCH NORTH Lab-Dup Dissolved Calcium (Ca) mg/L 11 11 9142756 2.7 0.30 9142756 Dissolved Chromium (Cr) mg/L 0.0011 0.0013 9142824 <0.0010 0.0010 9142824 Dissolved Cobalt (Co) mg/L <0.00030 <0.00030 9142824 <0.00030 0.00030 9142824 Dissolved Copper (Cu) mg/L 0.018 0.018 9142824 0.0012 0.00020 9142824 Dissolved Iron (Fe) mg/L 2.9 2.9 9142756 <0.060 0.060 9142756 Dissolved Lead (Pb) mg/L 0.00042 0.00040 9142824 <0.00020 0.00020 9142824 Dissolved Lithium (Li) mg/L <0.020 <0.020 9142756 <0.020 0.020 9142756 Dissolved Magnesium (Mg) mg/L 3.7 3.7 9142756 2.0 0.20 9142756 Dissolved Manganese (Mn) mg/L 0.013 0.013 9142756 <0.0040 0.0040 9142756 Dissolved Molybdenum (Mo) mg/L 0.00088 0.00089 9142824 <0.00020 0.00020 9142824 Dissolved Nickel (Ni) mg/L 0.0065 0.0068 9142824 0.00089 0.00050 9142824 Dissolved Phosphorus (P) mg/L <0.10 <0.10 9142756 <0.10 0.10 9142756 Dissolved Potassium (K) mg/L 4.2 4.2 9142756 1.8 0.30 9142756 Dissolved Selenium (Se) mg/L 0.00026 0.00020 9142824 <0.00020 0.00020 9142824 Dissolved Silicon (Si) mg/L 4.9 4.9 9142756 0.13 0.10 9142756 Dissolved Silver (Ag) mg/L <0.00010 <0.00010 9142824 <0.00010 0.00010 9142824 Dissolved Sodium (Na) mg/L 9.7 9.6 9142756 2.6 0.50 9142756 Dissolved Strontium (Sr) mg/L 0.072 0.071 9142756 0.021 0.020 9142756 Dissolved Sulphur (S) mg/L 11 11 9142756 3.0 0.20 9142756 Dissolved Thallium (Tl) mg/L <0.00020 <0.00020 9142824 <0.00020 0.00020 9142824 Dissolved Tin (Sn) mg/L <0.0010 <0.0010 9142824 <0.0010 0.0010 9142824 Dissolved Titanium (Ti) mg/L 0.0030 0.0028 9142824 <0.0010 0.0010 9142824 Dissolved Uranium (U) mg/L 0.0015 0.0016 9142824 <0.00010 0.00010 9142824 Dissolved Vanadium (V) mg/L <0.0010 0.0011 9142824 <0.0010 0.0010 9142824 Dissolved Zinc (Zn) mg/L <0.0030 <0.0030 9142824 <0.0030 0.0030 9142824 RDL = Reportable Detection Limit Lab-Dup = Laboratory Initiated Duplicate

Page 6 of 26 Maxxam Analytics International Corporation o/a Maxxam Analytics Edmonton: 9331 - 48th Street T6B 2R4 Telephone (780)577-7100 Fax (780)450-4187 Maxxam Job #: B878290 STANTEC CONSULTING LTD Report Date: 2018/09/19 Client Project #: 1214-15848 Sampler Initials: BW ROUTINE WATER & DISS. REGULATED METALS (WATER) Maxxam ID UH3070 UH3070 UH3071 UH3071 Sampling Date 2018/09/10 2018/09/10 2018/09/10 2018/09/10 COC Number 1 of 1 1 of 1 1 of 1 1 of 1 SOUTH NORTH POND UNITS NORTH POND QC Batch SOUTH POND POND RDL QC Batch Lab-Dup Lab-Dup Calculated Parameters Anion Sum meq/L 1.8 N/A 9141728 2.7 N/A N/A 9141728 Cation Sum meq/L 1.7 N/A 9141728 2.8 N/A N/A 9141728 Hardness (CaCO3) mg/L 59 N/A 9142003 96 N/A 0.50 9142003 Ion Balance (% Difference) % 1.4 N/A 9142004 1.6 N/A N/A 9142004 Dissolved Nitrate (N) mg/L 0.045 N/A 9141848 0.090 N/A 0.020 9141848 Dissolved Nitrate (NO3) mg/L 0.20 N/A 9142165 0.40 N/A 0.089 9142165 Dissolved Nitrite (NO2) mg/L <0.033 N/A 9142165 <0.033 N/A 0.033 9142165 Calculated Total Dissolved Solids mg/L 100 N/A 9141729 150 N/A 0.022 9141729 Misc. Inorganics Conductivity uS/cm 170 N/A 9143636 260 N/A 2.0 9143636 pH pH 7.57 N/A 9143631 7.77 N/A N/A 9143631 Anions Alkalinity (PP as CaCO3) mg/L <1.0 N/A 9143635 <1.0 N/A 1.0 9143635 Alkalinity (Total as CaCO3) mg/L 50 N/A 9143635 100 N/A 1.0 9143635 Bicarbonate (HCO3) mg/L 61 N/A 9143635 120 N/A 1.0 9143635 Carbonate (CO3) mg/L <1.0 N/A 9143635 <1.0 N/A 1.0 9143635 Hydroxide (OH) mg/L <1.0 N/A 9143635 <1.0 N/A 1.0 9143635 Dissolved Sulphate (SO4) mg/L 33 N/A 9143626 29 29 1.0 9143626 Dissolved Chloride (Cl) mg/L 4.1 N/A 9143581 1.6 2.1 1.0 9143581 Nutrients Dissolved Nitrite (N) mg/L <0.010 N/A 9145097 <0.010 N/A 0.010 9145097 Dissolved Nitrate plus Nitrite (N) mg/L 0.045 N/A 9145097 0.090 N/A 0.020 9145097 Elements Dissolved Aluminum (Al) mg/L 0.098 0.095 9148339 0.12 N/A 0.0030 9142824 Dissolved Antimony (Sb) mg/L <0.00060 <0.00060 9148339 <0.00060 N/A 0.00060 9142824 Dissolved Arsenic (As) mg/L 0.0018 0.0017 9148339 0.0058 N/A 0.00020 9142824 Dissolved Barium (Ba) mg/L 0.024 N/A 9142756 0.043 N/A 0.010 9142756 Dissolved Beryllium (Be) mg/L <0.0010 <0.0010 9148339 <0.0010 N/A 0.0010 9142824 Dissolved Boron (B) mg/L <0.020 N/A 9142756 <0.020 N/A 0.020 9142756 Dissolved Cadmium (Cd) mg/L <0.000020 <0.000020 9148339 <0.000020 N/A 0.000020 9142824 RDL = Reportable Detection Limit Lab-Dup = Laboratory Initiated Duplicate N/A = Not Applicable

Page 7 of 26 Maxxam Analytics International Corporation o/a Maxxam Analytics Edmonton: 9331 - 48th Street T6B 2R4 Telephone (780)577-7100 Fax (780)450-4187 Maxxam Job #: B878290 STANTEC CONSULTING LTD Report Date: 2018/09/19 Client Project #: 1214-15848 Sampler Initials: BW ROUTINE WATER & DISS. REGULATED METALS (WATER) Maxxam ID UH3070 UH3070 UH3071 UH3071 Sampling Date 2018/09/10 2018/09/10 2018/09/10 2018/09/10 COC Number 1 of 1 1 of 1 1 of 1 1 of 1 SOUTH NORTH POND UNITS NORTH POND QC Batch SOUTH POND POND RDL QC Batch Lab-Dup Lab-Dup Dissolved Calcium (Ca) mg/L 13 N/A 9142756 20 N/A 0.30 9142756 Dissolved Chromium (Cr) mg/L 0.0011 <0.0010 9148339 0.0014 N/A 0.0010 9142824 Dissolved Cobalt (Co) mg/L 0.00030 0.00030 9148339 0.0031 N/A 0.00030 9142824 Dissolved Copper (Cu) mg/L 0.0065 0.0062 9148339 0.0029 N/A 0.00020 9142824 Dissolved Iron (Fe) mg/L 1.0 N/A 9142756 3.6 N/A 0.060 9142756 Dissolved Lead (Pb) mg/L 0.00035 0.00036 9148339 <0.00020 N/A 0.00020 9142824 Dissolved Lithium (Li) mg/L <0.020 N/A 9142756 <0.020 N/A 0.020 9142756 Dissolved Magnesium (Mg) mg/L 6.5 N/A 9142756 11 N/A 0.20 9142756 Dissolved Manganese (Mn) mg/L 0.14 N/A 9142756 0.36 N/A 0.0040 9142756 Dissolved Molybdenum (Mo) mg/L 0.00068 0.00070 9148339 0.0014 N/A 0.00020 9142824 Dissolved Nickel (Ni) mg/L 0.0045 0.0041 9148339 0.0062 N/A 0.00050 9142824 Dissolved Phosphorus (P) mg/L <0.10 N/A 9142756 <0.10 N/A 0.10 9142756 Dissolved Potassium (K) mg/L 4.2 N/A 9142756 6.5 N/A 0.30 9142756 Dissolved Selenium (Se) mg/L <0.00020 <0.00020 9148339 <0.00020 N/A 0.00020 9142824 Dissolved Silicon (Si) mg/L 4.5 N/A 9142756 5.5 N/A 0.10 9142756 Dissolved Silver (Ag) mg/L <0.00010 <0.00010 9148339 <0.00010 N/A 0.00010 9142824 Dissolved Sodium (Na) mg/L 9.4 N/A 9142756 12 N/A 0.50 9142756 Dissolved Strontium (Sr) mg/L 0.11 N/A 9142756 0.20 N/A 0.020 9142756 Dissolved Sulphur (S) mg/L 11 N/A 9142756 10 N/A 0.20 9142756 Dissolved Thallium (Tl) mg/L <0.00020 <0.00020 9148339 <0.00020 N/A 0.00020 9142824 Dissolved Tin (Sn) mg/L <0.0010 <0.0010 9148339 <0.0010 N/A 0.0010 9142824 Dissolved Titanium (Ti) mg/L 0.0024 0.0021 9148339 0.0031 N/A 0.0010 9142824 Dissolved Uranium (U) mg/L 0.00073 0.00068 9148339 0.0011 N/A 0.00010 9142824 Dissolved Vanadium (V) mg/L <0.0010 <0.0010 9148339 0.0015 N/A 0.0010 9142824 Dissolved Zinc (Zn) mg/L 0.0033 <0.0030 9148339 <0.0030 N/A 0.0030 9142824 RDL = Reportable Detection Limit Lab-Dup = Laboratory Initiated Duplicate N/A = Not Applicable

Page 8 of 26 Maxxam Analytics International Corporation o/a Maxxam Analytics Edmonton: 9331 - 48th Street T6B 2R4 Telephone (780)577-7100 Fax (780)450-4187 Maxxam Job #: B878290 STANTEC CONSULTING LTD Report Date: 2018/09/19 Client Project #: 1214-15848 Sampler Initials: BW ROUTINE WATER & DISS. REGULATED METALS (WATER) Maxxam ID UH3072 UH3073 UH3074 Sampling Date 2018/09/10 2018/09/10 2018/09/10 COC Number 1 of 1 1 of 1 1 of 1

UNITS CHANNEL 1 QC Batch CHANNEL 2 QC Batch DUP 1 RDL QC Batch

Calculated Parameters Anion Sum meq/L 2.7 9141728 2.7 9142456 0.41 N/A 9142456 Cation Sum meq/L 2.8 9141728 2.8 9142456 0.46 N/A 9142456 Hardness (CaCO3) mg/L 95 9142455 96 9142455 15 0.50 9142455 Ion Balance (% Difference) % 1.4 9142004 2.3 9142004 5.5 N/A 9142004 Dissolved Nitrate (N) mg/L 0.051 9141848 0.060 9141848 <0.020 0.020 9141848 Dissolved Nitrate (NO3) mg/L 0.22 9142165 0.27 9142165 <0.089 0.089 9142165 Dissolved Nitrite (NO2) mg/L <0.033 9142165 <0.033 9142165 <0.033 0.033 9142165 Calculated Total Dissolved Solids mg/L 150 9142457 150 9142457 25 0.022 9142457 Misc. Inorganics Conductivity uS/cm 260 9143636 260 9143636 50 2.0 9143636 pH pH 7.56 9143631 7.67 9143631 7.19 N/A 9143631 Anions Alkalinity (PP as CaCO3) mg/L <1.0 9143635 <1.0 9143635 <1.0 1.0 9143635 Alkalinity (Total as CaCO3) mg/L 100 9143635 100 9143635 12 1.0 9143635 Bicarbonate (HCO3) mg/L 120 9143635 120 9143635 14 1.0 9143635 Carbonate (CO3) mg/L <1.0 9143635 <1.0 9143635 <1.0 1.0 9143635 Hydroxide (OH) mg/L <1.0 9143635 <1.0 9143635 <1.0 1.0 9143635 Dissolved Sulphate (SO4) mg/L 29 9143626 28 9143626 8.5 1.0 9143626 Dissolved Chloride (Cl) mg/L 2.1 9143581 2.1 9143581 <1.0 1.0 9143581 Nutrients Dissolved Nitrite (N) mg/L <0.010 9145097 <0.010 9145097 <0.010 0.010 9145097 Dissolved Nitrate plus Nitrite (N) mg/L 0.051 9145097 0.060 9145097 <0.020 0.020 9145097 Elements Dissolved Aluminum (Al) mg/L 0.11 9148339 0.13 9148339 0.011 0.0030 9142824 Dissolved Antimony (Sb) mg/L <0.00060 9148339 <0.00060 9148339 <0.00060 0.00060 9142824 Dissolved Arsenic (As) mg/L 0.0086 9148339 0.0071 9148339 0.00032 0.00020 9142824 Dissolved Barium (Ba) mg/L 0.046 9142756 0.045 9142756 <0.010 0.010 9142756 Dissolved Beryllium (Be) mg/L <0.0010 9148339 <0.0010 9148339 <0.0010 0.0010 9142824 Dissolved Boron (B) mg/L <0.020 9142756 <0.020 9142756 <0.020 0.020 9142756 Dissolved Cadmium (Cd) mg/L <0.000020 9148339 <0.000020 9148339 <0.000020 0.000020 9142824 Dissolved Calcium (Ca) mg/L 20 9142756 20 9142756 2.7 0.30 9142756 RDL = Reportable Detection Limit N/A = Not Applicable

Page 9 of 26 Maxxam Analytics International Corporation o/a Maxxam Analytics Edmonton: 9331 - 48th Street T6B 2R4 Telephone (780)577-7100 Fax (780)450-4187 Maxxam Job #: B878290 STANTEC CONSULTING LTD Report Date: 2018/09/19 Client Project #: 1214-15848 Sampler Initials: BW ROUTINE WATER & DISS. REGULATED METALS (WATER) Maxxam ID UH3072 UH3073 UH3074 Sampling Date 2018/09/10 2018/09/10 2018/09/10 COC Number 1 of 1 1 of 1 1 of 1

UNITS CHANNEL 1 QC Batch CHANNEL 2 QC Batch DUP 1 RDL QC Batch

Dissolved Chromium (Cr) mg/L 0.0017 9148339 0.0014 9148339 <0.0010 0.0010 9142824 Dissolved Cobalt (Co) mg/L 0.0024 9148339 0.0032 9148339 <0.00030 0.00030 9142824 Dissolved Copper (Cu) mg/L 0.0050 9148339 0.0052 9148339 0.00089 0.00020 9142824 Dissolved Iron (Fe) mg/L 5.4 9142756 4.4 9142756 <0.060 0.060 9142756 Dissolved Lead (Pb) mg/L 0.00032 9148339 0.00030 9148339 <0.00020 0.00020 9142824 Dissolved Lithium (Li) mg/L <0.020 9142756 <0.020 9142756 <0.020 0.020 9142756 Dissolved Magnesium (Mg) mg/L 11 9142756 11 9142756 2.0 0.20 9142756 Dissolved Manganese (Mn) mg/L 0.33 9142756 0.38 9142756 <0.0040 0.0040 9142756 Dissolved Molybdenum (Mo) mg/L 0.0014 9148339 0.0014 9148339 <0.00020 0.00020 9142824 Dissolved Nickel (Ni) mg/L 0.0059 9148339 0.0062 9148339 0.00068 0.00050 9142824 Dissolved Phosphorus (P) mg/L <0.10 9142756 <0.10 9142756 <0.10 0.10 9142756 Dissolved Potassium (K) mg/L 6.5 9142756 6.5 9142756 1.8 0.30 9142756 Dissolved Selenium (Se) mg/L <0.00020 9148339 <0.00020 9148339 <0.00020 0.00020 9142824 Dissolved Silicon (Si) mg/L 5.6 9142756 5.5 9142756 0.13 0.10 9142756 Dissolved Silver (Ag) mg/L <0.00010 9148339 <0.00010 9148339 <0.00010 0.00010 9142824 Dissolved Sodium (Na) mg/L 12 9142756 12 9142756 2.6 0.50 9142756 Dissolved Strontium (Sr) mg/L 0.20 9142756 0.20 9142756 0.021 0.020 9142756 Dissolved Sulphur (S) mg/L 9.9 9142756 10 9142756 3.0 0.20 9142756 Dissolved Thallium (Tl) mg/L <0.00020 9148339 <0.00020 9148339 <0.00020 0.00020 9142824 Dissolved Tin (Sn) mg/L <0.0010 9148339 <0.0010 9148339 <0.0010 0.0010 9142824 Dissolved Titanium (Ti) mg/L 0.0042 9148339 0.0034 9148339 <0.0010 0.0010 9142824 Dissolved Uranium (U) mg/L 0.0012 9148339 0.0011 9148339 <0.00010 0.00010 9142824 Dissolved Vanadium (V) mg/L 0.0020 9148339 0.0017 9148339 <0.0010 0.0010 9142824 Dissolved Zinc (Zn) mg/L 0.0044 9148339 0.0041 9148339 <0.0030 0.0030 9142824 RDL = Reportable Detection Limit

Page 10 of 26 Maxxam Analytics International Corporation o/a Maxxam Analytics Edmonton: 9331 - 48th Street T6B 2R4 Telephone (780)577-7100 Fax (780)450-4187 Maxxam Job #: B878290 STANTEC CONSULTING LTD Report Date: 2018/09/19 Client Project #: 1214-15848 Sampler Initials: BW ROUTINE + DISS. REG. METALS – LAB FILT (WATER) Maxxam ID UH3069 UH3069 Sampling Date 2018/09/10 2018/09/10 COC Number 1 of 1 1 of 1 LARRY LAKE LARRY LAKE UNITS SOUTH RDL QC Batch SOUTH Lab-Dup Calculated Parameters Anion Sum meq/L 0.40 N/A N/A 9141728 Cation Sum meq/L 0.45 N/A N/A 9141728 Hardness (CaCO3) mg/L 15 N/A 0.50 9142003 Ion Balance (% Difference) % 6.1 N/A N/A 9142004 Dissolved Nitrate (N) mg/L <0.020 N/A 0.020 9141848 Dissolved Nitrate (NO3) mg/L <0.089 N/A 0.089 9142165 Dissolved Nitrite (NO2) mg/L <0.033 N/A 0.033 9142165 Calculated Total Dissolved Solids mg/L 24 N/A 0.022 9141729 Misc. Inorganics Conductivity uS/cm 48 48 2.0 9143636 pH pH 7.14 7.12 N/A 9143631 Anions Alkalinity (PP as CaCO3) mg/L <1.0 <1.0 1.0 9143635 Alkalinity (Total as CaCO3) mg/L 11 11 1.0 9143635 Bicarbonate (HCO3) mg/L 14 14 1.0 9143635 Carbonate (CO3) mg/L <1.0 <1.0 1.0 9143635 Hydroxide (OH) mg/L <1.0 <1.0 1.0 9143635 Dissolved Sulphate (SO4) mg/L 8.4 N/A 1.0 9143626 Dissolved Chloride (Cl) mg/L <1.0 N/A 1.0 9143581 Nutrients Dissolved Nitrite (N) mg/L <0.010 N/A 0.010 9145097 Dissolved Nitrate plus Nitrite (N) mg/L <0.020 N/A 0.020 9145097 Lab Filtered Elements Dissolved Aluminum (Al) mg/L 0.0034 <0.0030 0.0030 9146467 Dissolved Antimony (Sb) mg/L <0.00060 <0.00060 0.00060 9146467 Dissolved Arsenic (As) mg/L 0.00028 0.00023 0.00020 9146467 Dissolved Barium (Ba) mg/L <0.010 N/A 0.010 9144001 Dissolved Beryllium (Be) mg/L <0.0010 <0.0010 0.0010 9146467 Dissolved Boron (B) mg/L <0.020 N/A 0.020 9144001 Dissolved Cadmium (Cd) mg/L <0.000020 <0.000020 0.000020 9146467 Dissolved Calcium (Ca) mg/L 2.7 N/A 0.30 9144001 RDL = Reportable Detection Limit Lab-Dup = Laboratory Initiated Duplicate N/A = Not Applicable

Page 11 of 26 Maxxam Analytics International Corporation o/a Maxxam Analytics Edmonton: 9331 - 48th Street T6B 2R4 Telephone (780)577-7100 Fax (780)450-4187 Maxxam Job #: B878290 STANTEC CONSULTING LTD Report Date: 2018/09/19 Client Project #: 1214-15848 Sampler Initials: BW ROUTINE + DISS. REG. METALS – LAB FILT (WATER) Maxxam ID UH3069 UH3069 Sampling Date 2018/09/10 2018/09/10 COC Number 1 of 1 1 of 1 LARRY LAKE LARRY LAKE UNITS SOUTH RDL QC Batch SOUTH Lab-Dup Dissolved Chromium (Cr) mg/L <0.0010 <0.0010 0.0010 9146467 Dissolved Cobalt (Co) mg/L <0.00030 <0.00030 0.00030 9146467 Dissolved Copper (Cu) mg/L 0.00043 0.00053 0.00020 9146467 Dissolved Iron (Fe) mg/L <0.060 N/A 0.060 9144001 Dissolved Lead (Pb) mg/L <0.00020 <0.00020 0.00020 9146467 Dissolved Lithium (Li) mg/L <0.020 N/A 0.020 9144001 Dissolved Magnesium (Mg) mg/L 2.0 N/A 0.20 9144001 Dissolved Manganese (Mn) mg/L <0.0040 N/A 0.0040 9144001 Dissolved Molybdenum (Mo) mg/L <0.00020 <0.00020 0.00020 9146467 Dissolved Nickel (Ni) mg/L 0.00086 0.00071 0.00050 9146467 Dissolved Phosphorus (P) mg/L <0.10 N/A 0.10 9144001 Dissolved Potassium (K) mg/L 1.8 N/A 0.30 9144001 Dissolved Selenium (Se) mg/L <0.00020 <0.00020 0.00020 9146467 Dissolved Silicon (Si) mg/L <0.10 N/A 0.10 9144001 Dissolved Silver (Ag) mg/L <0.00010 <0.00010 0.00010 9146467 Dissolved Sodium (Na) mg/L 2.4 N/A 0.50 9144001 Dissolved Strontium (Sr) mg/L 0.021 N/A 0.020 9144001 Dissolved Sulphur (S) mg/L 2.9 N/A 0.20 9144001 Dissolved Thallium (Tl) mg/L <0.00020 <0.00020 0.00020 9146467 Dissolved Tin (Sn) mg/L <0.0010 <0.0010 0.0010 9146467 Dissolved Titanium (Ti) mg/L <0.0010 <0.0010 0.0010 9146467 Dissolved Uranium (U) mg/L <0.00010 <0.00010 0.00010 9146467 Dissolved Vanadium (V) mg/L <0.0010 <0.0010 0.0010 9146467 Dissolved Zinc (Zn) mg/L <0.0030 <0.0030 0.0030 9146467 RDL = Reportable Detection Limit Lab-Dup = Laboratory Initiated Duplicate N/A = Not Applicable

Page 12 of 26 Maxxam Analytics International Corporation o/a Maxxam Analytics Edmonton: 9331 - 48th Street T6B 2R4 Telephone (780)577-7100 Fax (780)450-4187 Maxxam Job #: B878290 STANTEC CONSULTING LTD Report Date: 2018/09/19 Client Project #: 1214-15848 Sampler Initials: BW REGULATED METALS (CCME/AT1) - TOTAL Maxxam ID UH3067 UH3068 UH3069 UH3070 UH3071 Sampling Date 2018/09/09 2018/09/10 2018/09/10 2018/09/10 2018/09/10 COC Number 1 of 1 1 of 1 1 of 1 1 of 1 1 of 1 PHASE 1 LARRY LAKE LARRY LAKE UNITS NORTH POND SOUTH POND RDL QC Batch TRENCH NORTH SOUTH Elements Total Aluminum (Al) mg/L 0.32 0.015 0.0089 0.12 0.30 0.0030 9142545 Total Antimony (Sb) mg/L <0.00060 <0.00060 <0.00060 <0.00060 <0.00060 0.00060 9142545 Total Arsenic (As) mg/L 0.0028 0.00032 0.00026 0.0022 0.011 0.00020 9142545 Total Barium (Ba) mg/L 0.029 <0.010 <0.010 0.024 0.053 0.010 9142546 Total Beryllium (Be) mg/L <0.0010 <0.0010 <0.0010 <0.0010 <0.0010 0.0010 9142545 Total Boron (B) mg/L <0.020 <0.020 <0.020 <0.020 <0.020 0.020 9142546 Total Cadmium (Cd) mg/L 0.000025 <0.000020 <0.000020 0.000021 <0.000020 0.000020 9142545 Total Calcium (Ca) mg/L 11 2.6 2.6 13 19 0.30 9142546 Total Chromium (Cr) mg/L 0.0015 <0.0010 <0.0010 0.0016 0.0025 0.0010 9142545 Total Cobalt (Co) mg/L 0.00032 <0.00030 <0.00030 0.00030 0.0039 0.00030 9142545 Total Copper (Cu) mg/L 0.020 0.00091 0.0010 0.0029 0.0023 0.00020 9142545 Total Iron (Fe) mg/L 3.4 0.093 0.064 1.8 7.7 0.060 9142546 Total Lead (Pb) mg/L 0.00047 <0.00020 <0.00020 <0.00020 <0.00020 0.00020 9142545 Total Lithium (Li) mg/L <0.020 <0.020 <0.020 <0.020 <0.020 0.020 9142546 Total Magnesium (Mg) mg/L 3.7 2.0 1.9 6.4 11 0.20 9142546 Total Manganese (Mn) mg/L 0.014 <0.0040 <0.0040 0.14 0.45 0.0040 9142546 Total Molybdenum (Mo) mg/L 0.0012 0.00026 0.00020 0.00075 0.0017 0.00020 9142545 Total Nickel (Ni) mg/L 0.0068 0.0010 0.00098 0.0042 0.0077 0.00050 9142545 Total Phosphorus (P) mg/L <0.10 <0.10 <0.10 <0.10 <0.10 0.10 9142546 Total Potassium (K) mg/L 4.2 1.8 1.8 4.2 6.5 0.30 9142546 Total Selenium (Se) mg/L 0.00043 <0.00020 <0.00020 <0.00020 0.00024 0.00020 9142545 Total Silicon (Si) mg/L 4.9 0.14 0.10 4.4 5.6 0.10 9142546 Total Silver (Ag) mg/L <0.00010 <0.00010 <0.00010 <0.00010 <0.00010 0.00010 9142545 Total Sodium (Na) mg/L 9.6 2.5 2.4 9.4 12 0.50 9142546 Total Strontium (Sr) mg/L 0.070 0.021 0.020 0.10 0.20 0.020 9142546 Total Sulphur (S) mg/L 11 2.9 2.9 10 9.9 0.20 9142546 Total Thallium (Tl) mg/L <0.00020 <0.00020 <0.00020 <0.00020 <0.00020 0.00020 9142545 Total Tin (Sn) mg/L <0.0010 <0.0010 <0.0010 <0.0010 <0.0010 0.0010 9142545 Total Titanium (Ti) mg/L 0.0079 0.0014 0.0015 0.0038 0.015 0.0010 9142545 Total Uranium (U) mg/L 0.0020 <0.00010 <0.00010 0.00083 0.0014 0.00010 9142545 Total Vanadium (V) mg/L 0.0018 <0.0010 <0.0010 <0.0010 0.0030 0.0010 9142545 Total Zinc (Zn) mg/L <0.0030 <0.0030 <0.0030 <0.0030 <0.0030 0.0030 9142545 RDL = Reportable Detection Limit

Page 13 of 26 Maxxam Analytics International Corporation o/a Maxxam Analytics Edmonton: 9331 - 48th Street T6B 2R4 Telephone (780)577-7100 Fax (780)450-4187 Maxxam Job #: B878290 STANTEC CONSULTING LTD Report Date: 2018/09/19 Client Project #: 1214-15848 Sampler Initials: BW REGULATED METALS (CCME/AT1) - TOTAL Maxxam ID UH3072 UH3073 UH3074 Sampling Date 2018/09/10 2018/09/10 2018/09/10 COC Number 1 of 1 1 of 1 1 of 1 UNITS CHANNEL 1 CHANNEL 2 DUP 1 RDL QC Batch

Elements Total Aluminum (Al) mg/L 0.17 0.16 0.023 0.0030 9142545 Total Antimony (Sb) mg/L <0.00060 <0.00060 <0.00060 0.00060 9142545 Total Arsenic (As) mg/L 0.011 0.0086 0.00037 0.00020 9142545 Total Barium (Ba) mg/L 0.048 0.046 <0.010 0.010 9142546 Total Beryllium (Be) mg/L <0.0010 <0.0010 <0.0010 0.0010 9142545 Total Boron (B) mg/L <0.020 <0.020 <0.020 0.020 9142546 Total Cadmium (Cd) mg/L <0.000020 <0.000020 <0.000020 0.000020 9142545 Total Calcium (Ca) mg/L 20 20 2.6 0.30 9142546 Total Chromium (Cr) mg/L 0.0018 0.0017 <0.0010 0.0010 9142545 Total Cobalt (Co) mg/L 0.0025 0.0034 <0.00030 0.00030 9142545 Total Copper (Cu) mg/L 0.0020 0.0022 0.0011 0.00020 9142545 Total Iron (Fe) mg/L 7.2 5.7 0.10 0.060 9142546 Total Lead (Pb) mg/L <0.00020 <0.00020 <0.00020 0.00020 9142545 Total Lithium (Li) mg/L <0.020 <0.020 <0.020 0.020 9142546 Total Magnesium (Mg) mg/L 11 11 2.0 0.20 9142546 Total Manganese (Mn) mg/L 0.33 0.38 <0.0040 0.0040 9142546 Total Molybdenum (Mo) mg/L 0.0017 0.0017 <0.00020 0.00020 9142545 Total Nickel (Ni) mg/L 0.0057 0.0072 0.00088 0.00050 9142545 Total Phosphorus (P) mg/L <0.10 <0.10 <0.10 0.10 9142546 Total Potassium (K) mg/L 6.5 6.5 1.8 0.30 9142546 Total Selenium (Se) mg/L 0.00020 0.00022 <0.00020 0.00020 9142545 Total Silicon (Si) mg/L 5.6 5.5 0.15 0.10 9142546 Total Silver (Ag) mg/L <0.00010 <0.00010 <0.00010 0.00010 9142545 Total Sodium (Na) mg/L 12 12 2.6 0.50 9142546 Total Strontium (Sr) mg/L 0.20 0.20 0.021 0.020 9142546 Total Sulphur (S) mg/L 9.9 10 2.9 0.20 9142546 Total Thallium (Tl) mg/L <0.00020 <0.00020 <0.00020 0.00020 9142545 Total Tin (Sn) mg/L <0.0010 <0.0010 <0.0010 0.0010 9142545 Total Titanium (Ti) mg/L 0.0068 0.0045 0.0016 0.0010 9142545 Total Uranium (U) mg/L 0.0013 0.0013 <0.00010 0.00010 9142545 Total Vanadium (V) mg/L 0.0027 0.0025 <0.0010 0.0010 9142545 Total Zinc (Zn) mg/L <0.0030 <0.0030 <0.0030 0.0030 9142545 RDL = Reportable Detection Limit

Page 14 of 26 Maxxam Analytics International Corporation o/a Maxxam Analytics Edmonton: 9331 - 48th Street T6B 2R4 Telephone (780)577-7100 Fax (780)450-4187 Maxxam Job #: B878290 STANTEC CONSULTING LTD Report Date: 2018/09/19 Client Project #: 1214-15848 Sampler Initials: BW PETROLEUM HYDROCARBONS (CCME) Maxxam ID UH3068 UH3069 UH3074 Sampling Date 2018/09/10 2018/09/10 2018/09/10 COC Number 1 of 1 1 of 1 1 of 1 LARRY LAKE LARRY LAKE UNITS DUP 1 RDL QC Batch NORTH SOUTH Ext. Pet. Hydrocarbon C6-C50 Hydrocarbons mg/L <0.26 <0.26 <0.26 0.26 9148699 RDL = Reportable Detection Limit

Page 15 of 26 Maxxam Analytics International Corporation o/a Maxxam Analytics Edmonton: 9331 - 48th Street T6B 2R4 Telephone (780)577-7100 Fax (780)450-4187 Maxxam Job #: B878290 STANTEC CONSULTING LTD Report Date: 2018/09/19 Client Project #: 1214-15848 Sampler Initials: BW

GENERAL COMMENTS

Each temperature is the average of up to three cooler temperatures taken at receipt

Package 1 6.0°C Package 2 3.3°C Package 3 4.7°C Package 4 7.0°C Package 5 6.7°C

Sample UH3067 [PHASE 1 TRENCH] : Sample was analyzed past method specified hold time for NO2 - NO2 + NO3 (N) by CFA. Exceedance of hold time increases the uncertainty of test results but does not necessarily imply that results are compromised.

Sample UH3068 [LARRY LAKE NORTH] : Sample was analyzed past method specified hold time for NO2 - NO2 + NO3 (N) by CFA. Exceedance of hold time increases the uncertainty of test results but does not necessarily imply that results are compromised.

Sample UH3069 [LARRY LAKE SOUTH] : Sample was analyzed past method specified hold time for NO2 - NO2 + NO3 (N) by CFA. Exceedance of hold time increases the uncertainty of test results but does not necessarily imply that results are compromised.

Sample UH3070 [NORTH POND] : Sample was analyzed past method specified hold time for NO2 - NO2 + NO3 (N) by CFA. Exceedance of hold time increases the uncertainty of test results but does not necessarily imply that results are compromised.

Sample UH3071 [SOUTH POND] : Sample was analyzed past method specified hold time for NO2 - NO2 + NO3 (N) by CFA. Exceedance of hold time increases the uncertainty of test results but does not necessarily imply that results are compromised.

Sample UH3072 [CHANNEL 1] : Sample was analyzed past method specified hold time for NO2 - NO2 + NO3 (N) by CFA. Exceedance of hold time increases the uncertainty of test results but does not necessarily imply that results are compromised.

Sample UH3073 [CHANNEL 2] : Sample was analyzed past method specified hold time for NO2 - NO2 + NO3 (N) by CFA. Exceedance of hold time increases the uncertainty of test results but does not necessarily imply that results are compromised.

Sample UH3074 [DUP 1] : Sample was analyzed past method specified hold time for NO2 - NO2 + NO3 (N) by CFA. Exceedance of hold time increases the uncertainty of test results but does not necessarily imply that results are compromised.

Results relate only to the items tested.

Page 16 of 26 Maxxam Analytics International Corporation o/a Maxxam Analytics Edmonton: 9331 - 48th Street T6B 2R4 Telephone (780)577-7100 Fax (780)450-4187 Maxxam Job #: B878290 QUALITY ASSURANCE REPORT STANTEC CONSULTING LTD Report Date: 2018/09/19 Client Project #: 1214-15848 Sampler Initials: BW

Matrix Spike Spiked Blank Method Blank RPD QC Batch Parameter Date % Recovery QC Limits % Recovery QC Limits Value UNITS Value (%) QC Limits 9142522 O-TERPHENYL (sur.) 2018/09/14 92 60 - 140 97 60 - 140 96 % 9142596 1,4-Difluorobenzene (sur.) 2018/09/14 90 50 - 140 99 50 - 140 99 % 9142596 4-Bromofluorobenzene (sur.) 2018/09/14 104 50 - 140 99 50 - 140 101 % 9142596 D4-1,2-Dichloroethane (sur.) 2018/09/14 122 50 - 140 105 50 - 140 102 % 9142522 F2 (C10-C16 Hydrocarbons) 2018/09/14 91 60 - 140 94 60 - 140 <0.10 mg/L 3.1 30 9142522 F3 (C16-C34 Hydrocarbons) 2018/09/14 91 60 - 140 94 60 - 140 <0.10 mg/L NC 30 9142522 F4 (C34-C50 Hydrocarbons) 2018/09/14 85 60 - 140 90 60 - 140 <0.20 mg/L NC 30 9142545 Total Aluminum (Al) 2018/09/14 96 80 - 120 94 80 - 120 <0.0030 mg/L NC 20 9142545 Total Antimony (Sb) 2018/09/14 100 80 - 120 96 80 - 120 <0.00060 mg/L NC 20 9142545 Total Arsenic (As) 2018/09/14 96 80 - 120 95 80 - 120 <0.00020 mg/L 15 20 9142545 Total Beryllium (Be) 2018/09/14 99 80 - 120 93 80 - 120 <0.0010 mg/L NC 20 9142545 Total Cadmium (Cd) 2018/09/14 97 80 - 120 94 80 - 120 <0.000020 mg/L NC 20 9142545 Total Chromium (Cr) 2018/09/14 99 80 - 120 97 80 - 120 <0.0010 mg/L NC 20 9142545 Total Cobalt (Co) 2018/09/14 96 80 - 120 97 80 - 120 <0.00030 mg/L NC 20 9142545 Total Copper (Cu) 2018/09/14 96 80 - 120 98 80 - 120 <0.00020 mg/L NC 20 9142545 Total Lead (Pb) 2018/09/14 97 80 - 120 97 80 - 120 <0.00020 mg/L NC 20 9142545 Total Molybdenum (Mo) 2018/09/14 104 80 - 120 97 80 - 120 <0.00020 mg/L 9.1 20 9142545 Total Nickel (Ni) 2018/09/14 95 80 - 120 96 80 - 120 <0.00050 mg/L NC 20 9142545 Total Selenium (Se) 2018/09/14 103 80 - 120 100 80 - 120 <0.00020 mg/L NC 20 9142545 Total Silver (Ag) 2018/09/14 94 80 - 120 93 80 - 120 <0.00010 mg/L NC 20 9142545 Total Thallium (Tl) 2018/09/14 104 80 - 120 101 80 - 120 <0.00020 mg/L NC 20 9142545 Total Tin (Sn) 2018/09/14 98 80 - 120 95 80 - 120 <0.0010 mg/L NC 20 9142545 Total Titanium (Ti) 2018/09/14 92 80 - 120 91 80 - 120 <0.0010 mg/L NC 20 9142545 Total Uranium (U) 2018/09/14 102 80 - 120 100 80 - 120 <0.00010 mg/L NC 20 9142545 Total Vanadium (V) 2018/09/14 100 80 - 120 98 80 - 120 <0.0010 mg/L NC 20 9142545 Total Zinc (Zn) 2018/09/14 95 80 - 120 95 80 - 120 <0.0030 mg/L NC 20 9142546 Total Barium (Ba) 2018/09/14 93 80 - 120 94 80 - 120 <0.010 mg/L 0.41 20 9142546 Total Boron (B) 2018/09/14 96 80 - 120 97 80 - 120 <0.020 mg/L 0.35 20 9142546 Total Calcium (Ca) 2018/09/14 90 80 - 120 91 80 - 120 <0.30 mg/L 0.11 20 9142546 Total Iron (Fe) 2018/09/14 90 80 - 120 92 80 - 120 <0.060 mg/L 2.4 20 9142546 Total Lithium (Li) 2018/09/14 91 80 - 120 91 80 - 120 <0.020 mg/L NC 20 Page 17 of 26 Maxxam Analytics International Corporation o/a Maxxam Analytics Edmonton: 9331 - 48th Street T6B 2R4 Telephone (780)577-7100 Fax (780)450-4187 Maxxam Job #: B878290 QUALITY ASSURANCE REPORT(CONT'D) STANTEC CONSULTING LTD Report Date: 2018/09/19 Client Project #: 1214-15848 Sampler Initials: BW

Matrix Spike Spiked Blank Method Blank RPD QC Batch Parameter Date % Recovery QC Limits % Recovery QC Limits Value UNITS Value (%) QC Limits 9142546 Total Magnesium (Mg) 2018/09/14 91 80 - 120 92 80 - 120 <0.20 mg/L 0.40 20 9142546 Total Manganese (Mn) 2018/09/14 92 80 - 120 93 80 - 120 <0.0040 mg/L 0.55 20 9142546 Total Phosphorus (P) 2018/09/14 89 80 - 120 91 80 - 120 <0.10 mg/L NC 20 9142546 Total Potassium (K) 2018/09/14 94 80 - 120 95 80 - 120 <0.30 mg/L 0.24 20 9142546 Total Silicon (Si) 2018/09/14 89 80 - 120 90 80 - 120 <0.10 mg/L 0.26 20 9142546 Total Sodium (Na) 2018/09/14 90 80 - 120 90 80 - 120 <0.50 mg/L 0.62 20 9142546 Total Strontium (Sr) 2018/09/14 88 80 - 120 88 80 - 120 <0.020 mg/L 0.41 20 9142546 Total Sulphur (S) 2018/09/14 <0.20 mg/L 0.036 20 9142596 Benzene 2018/09/15 -159.1565N 50 - 140 92 60 - 130 <0.40 ug/L 2.7 30 9142596 Ethylbenzene 2018/09/15 NC 50 - 140 89 60 - 130 <0.40 ug/L 0.40 30 9142596 F1 (C6-C10) 2018/09/15 NC 60 - 140 113 60 - 140 <100 ug/L 18 30 9142596 m & p-Xylene 2018/09/15 NC 50 - 140 88 60 - 130 <0.80 ug/L 2.2 30 9142596 o-Xylene 2018/09/15 80 50 - 140 86 60 - 130 <0.40 ug/L 5.7 30 9142596 Toluene 2018/09/15 NC 50 - 140 90 60 - 130 <0.40 ug/L 13 30 9142643 Dissolved Chloride (Cl) 2018/09/14 109 80 - 120 104 80 - 120 <1.0 mg/L 1.7 20 9142644 Dissolved Sulphate (SO4) 2018/09/14 NC 80 - 120 100 80 - 120 <1.0 mg/L 0.76 20 9142756 Dissolved Barium (Ba) 2018/09/14 102 80 - 120 101 80 - 120 <0.010 mg/L 1.0 20 9142756 Dissolved Boron (B) 2018/09/14 106 80 - 120 104 80 - 120 <0.020 mg/L NC 20 9142756 Dissolved Calcium (Ca) 2018/09/14 98 80 - 120 98 80 - 120 <0.30 mg/L 0.14 20 9142756 Dissolved Iron (Fe) 2018/09/14 94 80 - 120 97 80 - 120 <0.060 mg/L 0.13 20 9142756 Dissolved Lithium (Li) 2018/09/14 98 80 - 120 100 80 - 120 <0.020 mg/L NC 20 9142756 Dissolved Magnesium (Mg) 2018/09/14 101 80 - 120 99 80 - 120 <0.20 mg/L 0.19 20 9142756 Dissolved Manganese (Mn) 2018/09/14 99 80 - 120 98 80 - 120 <0.0040 mg/L 0.77 20 9142756 Dissolved Phosphorus (P) 2018/09/14 103 80 - 120 99 80 - 120 <0.10 mg/L NC 20 9142756 Dissolved Potassium (K) 2018/09/14 103 80 - 120 103 80 - 120 <0.30 mg/L 0.17 20 9142756 Dissolved Silicon (Si) 2018/09/14 88 80 - 120 92 80 - 120 <0.10 mg/L 0.17 20 9142756 Dissolved Sodium (Na) 2018/09/14 96 80 - 120 98 80 - 120 <0.50 mg/L 0.49 20 9142756 Dissolved Strontium (Sr) 2018/09/14 95 80 - 120 94 80 - 120 <0.020 mg/L 0.20 20 9142756 Dissolved Sulphur (S) 2018/09/14 99 80 - 120 <0.20 mg/L 0.25 20 9142824 Dissolved Aluminum (Al) 2018/09/14 NC 80 - 120 99 80 - 120 <0.0030 mg/L 1.4 20 9142824 Dissolved Antimony (Sb) 2018/09/14 103 80 - 120 101 80 - 120 <0.00060 mg/L NC 20 Page 18 of 26 Maxxam Analytics International Corporation o/a Maxxam Analytics Edmonton: 9331 - 48th Street T6B 2R4 Telephone (780)577-7100 Fax (780)450-4187 Maxxam Job #: B878290 QUALITY ASSURANCE REPORT(CONT'D) STANTEC CONSULTING LTD Report Date: 2018/09/19 Client Project #: 1214-15848 Sampler Initials: BW

Matrix Spike Spiked Blank Method Blank RPD QC Batch Parameter Date % Recovery QC Limits % Recovery QC Limits Value UNITS Value (%) QC Limits 9142824 Dissolved Arsenic (As) 2018/09/14 100 80 - 120 96 80 - 120 <0.00020 mg/L 8.3 20 9142824 Dissolved Beryllium (Be) 2018/09/14 96 80 - 120 98 80 - 120 <0.0010 mg/L NC 20 9142824 Dissolved Cadmium (Cd) 2018/09/14 100 80 - 120 100 80 - 120 <0.000020 mg/L NC 20 9142824 Dissolved Chromium (Cr) 2018/09/14 100 80 - 120 100 80 - 120 <0.0010 mg/L 13 20 9142824 Dissolved Cobalt (Co) 2018/09/14 99 80 - 120 97 80 - 120 <0.00030 mg/L NC 20 9142824 Dissolved Copper (Cu) 2018/09/14 101 80 - 120 98 80 - 120 <0.00020 mg/L 0.0055 20 9142824 Dissolved Lead (Pb) 2018/09/14 97 80 - 120 97 80 - 120 <0.00020 mg/L 6.1 20 9142824 Dissolved Molybdenum (Mo) 2018/09/14 98 80 - 120 97 80 - 120 <0.00020 mg/L 1.5 20 9142824 Dissolved Nickel (Ni) 2018/09/14 100 80 - 120 95 80 - 120 <0.00050 mg/L 5.0 20 9142824 Dissolved Selenium (Se) 2018/09/14 101 80 - 120 102 80 - 120 <0.00020 mg/L NC 20 9142824 Dissolved Silver (Ag) 2018/09/14 97 80 - 120 97 80 - 120 <0.00010 mg/L NC 20 9142824 Dissolved Thallium (Tl) 2018/09/14 98 80 - 120 98 80 - 120 <0.00020 mg/L NC 20 9142824 Dissolved Tin (Sn) 2018/09/14 97 80 - 120 103 80 - 120 <0.0010 mg/L NC 20 9142824 Dissolved Titanium (Ti) 2018/09/14 101 80 - 120 106 80 - 120 <0.0010 mg/L 4.3 20 9142824 Dissolved Uranium (U) 2018/09/14 98 80 - 120 97 80 - 120 <0.00010 mg/L 3.2 20 9142824 Dissolved Vanadium (V) 2018/09/14 103 80 - 120 100 80 - 120 <0.0010 mg/L 5.1 20 9142824 Dissolved Zinc (Zn) 2018/09/14 100 80 - 120 98 80 - 120 <0.0030 mg/L NC 20 9143581 Dissolved Chloride (Cl) 2018/09/15 110 80 - 120 103 80 - 120 <1.0 mg/L NC 20 9143616 pH 2018/09/14 100 97 - 103 0.030 N/A 9143622 Alkalinity (PP as CaCO3) 2018/09/14 <1.0 mg/L NC 20 9143622 Alkalinity (Total as CaCO3) 2018/09/14 102 80 - 120 <1.0 mg/L 4.8 20 9143622 Bicarbonate (HCO3) 2018/09/14 <1.0 mg/L 4.8 20 9143622 Carbonate (CO3) 2018/09/14 <1.0 mg/L NC 20 9143622 Hydroxide (OH) 2018/09/14 <1.0 mg/L NC 20 9143624 Conductivity 2018/09/14 100 90 - 110 <2.0 uS/cm 0.40 10 9143626 Dissolved Sulphate (SO4) 2018/09/15 NC 80 - 120 99 80 - 120 <1.0 mg/L 0.25 20 9143631 pH 2018/09/14 100 97 - 103 0.20 N/A 9143635 Alkalinity (PP as CaCO3) 2018/09/14 <1.0 mg/L NC 20 9143635 Alkalinity (Total as CaCO3) 2018/09/14 101 80 - 120 <1.0 mg/L 0.66 20 9143635 Bicarbonate (HCO3) 2018/09/14 <1.0 mg/L 0.66 20 9143635 Carbonate (CO3) 2018/09/14 <1.0 mg/L NC 20 Page 19 of 26 Maxxam Analytics International Corporation o/a Maxxam Analytics Edmonton: 9331 - 48th Street T6B 2R4 Telephone (780)577-7100 Fax (780)450-4187 Maxxam Job #: B878290 QUALITY ASSURANCE REPORT(CONT'D) STANTEC CONSULTING LTD Report Date: 2018/09/19 Client Project #: 1214-15848 Sampler Initials: BW

Matrix Spike Spiked Blank Method Blank RPD QC Batch Parameter Date % Recovery QC Limits % Recovery QC Limits Value UNITS Value (%) QC Limits 9143635 Hydroxide (OH) 2018/09/14 <1.0 mg/L NC 20 9143636 Conductivity 2018/09/14 99 90 - 110 <2.0 uS/cm 0.20 10 9144001 Dissolved Barium (Ba) 2018/09/14 22 (1) 80 - 120 100 80 - 120 <0.010 mg/L 9144001 Dissolved Boron (B) 2018/09/14 102 80 - 120 103 80 - 120 <0.020 mg/L 9144001 Dissolved Calcium (Ca) 2018/09/15 NC 80 - 120 97 80 - 120 <0.30 mg/L 1.4 20 9144001 Dissolved Iron (Fe) 2018/09/15 98 80 - 120 96 80 - 120 <0.060 mg/L NC 20 9144001 Dissolved Lithium (Li) 2018/09/14 94 80 - 120 96 80 - 120 <0.020 mg/L 9144001 Dissolved Magnesium (Mg) 2018/09/15 NC 80 - 120 99 80 - 120 <0.20 mg/L 1.9 20 9144001 Dissolved Manganese (Mn) 2018/09/15 100 80 - 120 97 80 - 120 <0.0040 mg/L NC 20 9144001 Dissolved Phosphorus (P) 2018/09/14 102 80 - 120 100 80 - 120 <0.10 mg/L 9144001 Dissolved Potassium (K) 2018/09/15 102 80 - 120 102 80 - 120 <0.30 mg/L 1.2 20 9144001 Dissolved Silicon (Si) 2018/09/14 91 80 - 120 91 80 - 120 <0.10 mg/L 9144001 Dissolved Sodium (Na) 2018/09/15 NC 80 - 120 97 80 - 120 <0.50 mg/L 0.88 20 9144001 Dissolved Strontium (Sr) 2018/09/14 90 80 - 120 94 80 - 120 <0.020 mg/L 9144001 Dissolved Sulphur (S) 2018/09/14 101 80 - 120 <0.20 mg/L 9145097 Dissolved Nitrate plus Nitrite (N) 2018/09/16 99 80 - 120 97 80 - 120 <0.020 mg/L 0.37 20 9145097 Dissolved Nitrite (N) 2018/09/16 105 80 - 120 102 80 - 120 <0.010 mg/L NC 20 9146467 Dissolved Aluminum (Al) 2018/09/17 94 80 - 120 91 80 - 120 <0.0030 mg/L 12 20 9146467 Dissolved Antimony (Sb) 2018/09/17 92 80 - 120 90 80 - 120 <0.00060 mg/L NC 20 9146467 Dissolved Arsenic (As) 2018/09/17 94 80 - 120 95 80 - 120 <0.00020 mg/L 19 20 9146467 Dissolved Beryllium (Be) 2018/09/17 97 80 - 120 97 80 - 120 <0.0010 mg/L NC 20 9146467 Dissolved Cadmium (Cd) 2018/09/17 95 80 - 120 94 80 - 120 <0.000020 mg/L NC 20 9146467 Dissolved Chromium (Cr) 2018/09/17 101 80 - 120 100 80 - 120 <0.0010 mg/L NC 20 9146467 Dissolved Cobalt (Co) 2018/09/17 100 80 - 120 100 80 - 120 <0.00030 mg/L NC 20 9146467 Dissolved Copper (Cu) 2018/09/17 100 80 - 120 104 80 - 120 <0.00020 mg/L NC 20 9146467 Dissolved Lead (Pb) 2018/09/17 93 80 - 120 93 80 - 120 <0.00020 mg/L NC 20 9146467 Dissolved Molybdenum (Mo) 2018/09/17 98 80 - 120 97 80 - 120 <0.00020 mg/L NC 20 9146467 Dissolved Nickel (Ni) 2018/09/17 96 80 - 120 96 80 - 120 <0.00050 mg/L 20 20 9146467 Dissolved Selenium (Se) 2018/09/17 101 80 - 120 102 80 - 120 <0.00020 mg/L NC 20 9146467 Dissolved Silver (Ag) 2018/09/17 94 80 - 120 94 80 - 120 <0.00010 mg/L NC 20 9146467 Dissolved Thallium (Tl) 2018/09/17 95 80 - 120 93 80 - 120 <0.00020 mg/L NC 20 Page 20 of 26 Maxxam Analytics International Corporation o/a Maxxam Analytics Edmonton: 9331 - 48th Street T6B 2R4 Telephone (780)577-7100 Fax (780)450-4187 Maxxam Job #: B878290 QUALITY ASSURANCE REPORT(CONT'D) STANTEC CONSULTING LTD Report Date: 2018/09/19 Client Project #: 1214-15848 Sampler Initials: BW

Matrix Spike Spiked Blank Method Blank RPD QC Batch Parameter Date % Recovery QC Limits % Recovery QC Limits Value UNITS Value (%) QC Limits 9146467 Dissolved Tin (Sn) 2018/09/17 93 80 - 120 93 80 - 120 <0.0010 mg/L NC 20 9146467 Dissolved Titanium (Ti) 2018/09/17 93 80 - 120 83 80 - 120 <0.0010 mg/L NC 20 9146467 Dissolved Uranium (U) 2018/09/17 96 80 - 120 94 80 - 120 <0.00010 mg/L NC 20 9146467 Dissolved Vanadium (V) 2018/09/17 99 80 - 120 97 80 - 120 <0.0010 mg/L NC 20 9146467 Dissolved Zinc (Zn) 2018/09/17 101 80 - 120 100 80 - 120 <0.0030 mg/L NC 20 9148339 Dissolved Aluminum (Al) 2018/09/18 NC 80 - 120 101 80 - 120 <0.0030 mg/L 3.7 20 9148339 Dissolved Antimony (Sb) 2018/09/18 94 80 - 120 89 80 - 120 <0.00060 mg/L NC 20 9148339 Dissolved Arsenic (As) 2018/09/18 97 80 - 120 99 80 - 120 <0.00020 mg/L 7.2 20 9148339 Dissolved Beryllium (Be) 2018/09/18 96 80 - 120 95 80 - 120 <0.0010 mg/L NC 20 9148339 Dissolved Cadmium (Cd) 2018/09/18 100 80 - 120 97 80 - 120 <0.000020 mg/L NC 20 9148339 Dissolved Chromium (Cr) 2018/09/18 97 80 - 120 99 80 - 120 <0.0010 mg/L 5.9 20 9148339 Dissolved Cobalt (Co) 2018/09/18 96 80 - 120 99 80 - 120 <0.00030 mg/L 0.33 20 9148339 Dissolved Copper (Cu) 2018/09/18 95 80 - 120 100 80 - 120 <0.00020 mg/L 4.2 20 9148339 Dissolved Lead (Pb) 2018/09/18 102 80 - 120 97 80 - 120 <0.00020 mg/L 1.7 20 9148339 Dissolved Molybdenum (Mo) 2018/09/18 97 80 - 120 96 80 - 120 <0.00020 mg/L 3.5 20 9148339 Dissolved Nickel (Ni) 2018/09/18 95 80 - 120 99 80 - 120 <0.00050 mg/L 8.5 20 9148339 Dissolved Selenium (Se) 2018/09/18 95 80 - 120 99 80 - 120 <0.00020 mg/L NC 20 9148339 Dissolved Silver (Ag) 2018/09/18 101 80 - 120 97 80 - 120 <0.00010 mg/L NC 20 9148339 Dissolved Thallium (Tl) 2018/09/18 98 80 - 120 96 80 - 120 <0.00020 mg/L NC 20 9148339 Dissolved Tin (Sn) 2018/09/18 100 80 - 120 97 80 - 120 <0.0010 mg/L NC 20 9148339 Dissolved Titanium (Ti) 2018/09/18 97 80 - 120 104 80 - 120 <0.0010 mg/L 12 20 9148339 Dissolved Uranium (U) 2018/09/18 94 80 - 120 97 80 - 120 <0.00010 mg/L 6.6 20 9148339 Dissolved Vanadium (V) 2018/09/18 96 80 - 120 99 80 - 120 <0.0010 mg/L NC 20

Page 21 of 26 Maxxam Analytics International Corporation o/a Maxxam Analytics Edmonton: 9331 - 48th Street T6B 2R4 Telephone (780)577-7100 Fax (780)450-4187 Maxxam Job #: B878290 QUALITY ASSURANCE REPORT(CONT'D) STANTEC CONSULTING LTD Report Date: 2018/09/19 Client Project #: 1214-15848 Sampler Initials: BW

Matrix Spike Spiked Blank Method Blank RPD QC Batch Parameter Date % Recovery QC Limits % Recovery QC Limits Value UNITS Value (%) QC Limits 9148339 Dissolved Zinc (Zn) 2018/09/18 100 80 - 120 100 80 - 120 <0.0030 mg/L 10 20 N/A = Not Applicable Duplicate: Paired analysis of a separate portion of the same sample. Used to evaluate the variance in the measurement. Matrix Spike: A sample to which a known amount of the analyte of interest has been added. Used to evaluate sample matrix interference. Spiked Blank: A blank matrix sample to which a known amount of the analyte, usually from a second source, has been added. Used to evaluate method accuracy. Method Blank: A blank matrix containing all reagents used in the analytical procedure. Used to identify laboratory contamination. Surrogate: A pure or isotopically labeled compound whose behavior mirrors the analytes of interest. Used to evaluate extraction efficiency. NC (Matrix Spike): The recovery in the matrix spike was not calculated. The relative difference between the concentration in the parent sample and the spike amount was too small to permit a reliable recovery calculation (matrix spike concentration was less than the native sample concentration) NC (Duplicate RPD): The duplicate RPD was not calculated. The concentration in the sample and/or duplicate was too low to permit a reliable RPD calculation (absolute difference <= 2x RDL). (1) Recovery or RPD for this parameter is outside control limits. The overall quality control for this analysis meets acceptability criteria.

Page 22 of 26 Maxxam Analytics International Corporation o/a Maxxam Analytics Edmonton: 9331 - 48th Street T6B 2R4 Telephone (780)577-7100 Fax (780)450-4187 Maxxam Job #: B878290 STANTEC CONSULTING LTD Report Date: 2018/09/19 Client Project #: 1214-15848 Sampler Initials: BW

VALIDATION SIGNATURE PAGE

The analytical data and all QC contained in this report were reviewed and validated by the following individual(s).

Daniel Reslan, cCT, QP, Organics Manager

Justin Geisel, B.Sc., Organics Supervisor

Winnie Au, B.Sc., QP, Scientific Specialist

Maxxam has procedures in place to guard against improper use of the electronic signature and have the required "signatories", as per section 5.10.2 of ISO/IEC 17025:2005(E), signing the reports. For Service Group specific validation please refer to the Validation Signature Page.

Page 23 of 26 Maxxam Analytics International Corporation o/a Maxxam Analytics Edmonton: 9331 - 48th Street T6B 2R4 Telephone (780)577-7100 Fax (780)450-4187 Maxxam Job #: B878290 STANTEC CONSULTING LTD Report Date: 2018/09/19 Client Project #: 1214-15848 Maxxam Sample: UH3068 Client ID: LARRY LAKE NORTH CCME Hydrocarbons (F2-F4 in water) Chromatogram

Note: This information is provided for reference purposes only. Should detailed chemist interpretation or fingerprinting be required, please contact the laboratory.

Page 24 of 26 Maxxam Job #: B878290 STANTEC CONSULTING LTD Report Date: 2018/09/19 Client Project #: 1214-15848 Maxxam Sample: UH3069 Client ID: LARRY LAKE SOUTH CCME Hydrocarbons (F2-F4 in water) Chromatogram

Note: This information is provided for reference purposes only. Should detailed chemist interpretation or fingerprinting be required, please contact the laboratory.

Page 25 of 26 Maxxam Job #: B878290 STANTEC CONSULTING LTD Report Date: 2018/09/19 Client Project #: 1214-15848 Maxxam Sample: UH3074 Client ID: DUP 1 CCME Hydrocarbons (F2-F4 in water) Chromatogram

Note: This information is provided for reference purposes only. Should detailed chemist interpretation or fingerprinting be required, please contact the laboratory.

Page 26 of 26 Appendix K

Panda/Koala Conveyor Memo and Authorization

900 - 606 4 Street SW, Calgary, AB, Canada, T2P 1T1 T 1.403.910.1933 F 1.403.910.1934 www.ddcorp.ca Dominion Diamond Ekati ULC 900-606 4 Street SW (403) 910-1933 Calgary, Alberta T2P 1T1 (403) 910-1934 fax www.ddmines.com

25 July, 2018

North Slave Regional Office Department of Lands Government of the Northwest Territories #16 Yellowknife Airport Yellowknife, NT X1A 3T2

Attention: Marty Sanderson Manager, Diamond Resource Management

INTRODUCTION Koala Underground ore production is scheduled for completion at the end of December 2018. Reclamation of the Koala and Panda Underground workings is required prior to processed kimberlite deposition and pit flooding activities. As part of this process, Dominion Diamond Ekati ULC’s strategy is to leave the entire underground conveyor system intact, and complete the following remediation actions:  Drain hydraulic oil from all gearboxes, hydraulic take ups, and other units as applicable; and  Purge grease from pulleys and other non-sealed units and replace with Mobile SHC Grease 102 EAL (per GNWT Lands – Authorization to use biodegradable grease underground memorandum - dated 20 July 2018) This technical memorandum and supporting documentation seeks authorization to leave the conveyor idler rollers underground. This request is driven by the safety risks associated with the removal of the rollers, and the low potential for any environmental effect.

SAFETY RISKS In order to remove the idler rollers, the conveyor belt would need to be removed. This work requires clamping and cutting of the belt, which poses significant risk to workers who would be working at heights in tight quarters. There is an additional risk to damaging the roof support while working with mobile equipment near the connections between the conveyor frame and walls/roof of the mine. Damage to the roof supports poses a significant risk, as it compromises the ground conditions. These concerns, combined with other hazards associated with working in an underground environment, have the potential to result in injuries and represent a risk to worker health and safety.

LOW POTENTIAL FOR ENVIRONMENTAL EFFECTS

The low potential for environmental effects associated with leaving the idler rollers in place is a result of the following items:

Record #:HSE RCD ENV 1036 Document Owner: Environment Department Date:25-July-2018 Template # EKA TEM 1852.13

Dominion Diamond Ekati ULC 900-606 4 Street SW (403) 910-1933 Calgary, Alberta T2P 1T1 (403) 910-1934 fax www.ddmines.com

1. The Idler Rollers have limited quantities of hydrophilic grease, that if released individually would be below the reportable spill threshold and would not be considered a spill; 2. The grease is classified as inherently biodegradable and is not a TDG regulated substance (MSDS); and 3. The water pressure exerted on the bearings will enhance the stability of the grease in situ.

1. Idlers and Roller Grease Volumes In an effort to determine the total amount of grease per bearing, Dominion contacted the roller manufacturer, Luff Industries Ltd., and requested that the manufacturer provide a technical memorandum detailing the anticipated volumes of grease within each component (Appendix A). Idlers provided by Luff Industries are factory packed, sealed bearings that are run to failure. Individual release of grease from bearings would be well below the reportable spill volume of 100 L.

Upon review of the conveyance systems specifications, the following represents a summary of Idlers and Rollers that contain grease within the Panda and Koala conveyor system:

Table 1: Grease in Panda/Koala Conveyor System Luff Description Quantity Grease Volume per Grease Volume (L) Installed unit (L) 6" Steel Roller CEMA D 9576 0.016 153.22 6" Impact Roller CEMA D 78 0.016 1.25 6" Steel Return Roller 48 0.016 0.79 CEMA D 6" Steel Roller CEMA D 1208 0.031 37.45 c/w High Moisture Seal 4" Urethane Guide Roller 8 0.016 0.13 6" Rubber Disc Return 50 0.016 0.80 Idler CEMA E 6" Disc Return Roller 142 0.031 4.40 CEMA D 6" Rubber Disc Return 80 0.031 2.48 Roller CEMA D 6" Steel Roller CEMA E 93 0.016 1.49 Total Grease 201.10 Volume (L)

2. Biodegradable Grease

Esso Epic EP-102 used in the conveyor system is both a non-TDG classified substance and classified as inherently biodegradable. Inherently biodegradable materials must achieve greater than 20% biodegradation within the first 28 days.

Record #:HSE RCD ENV 1036 Document Owner: Environment Department Date:25-July-2018 Template # EKA TEM 1852.13

Dominion Diamond Ekati ULC 900-606 4 Street SW (403) 910-1933 Calgary, Alberta T2P 1T1 (403) 910-1934 fax www.ddmines.com

3. Water Action and Bearing Response As the main bearing housings are not completely full of grease there will be air space within the cavity. Once the mine is flooded water could be forced through the labyrinth seals and into the bearing housing. The water will either displace the air out of the housing or compress the trapped air within the housing. Some water will end up in the bearing housing that contains the grease. The grease should not be displaced as it will not compress, has a high viscosity rating, and low emulsion factor (will not mix with water easily should it stay in current state).

Once water enters the bearing house, inside the sealed bearing, there will not be any water flow through the grease containment. When the mine is completely flooded the water pressure on the bearings will be equal in all different directions to hold the grease in location. Once the underground workings are flooded there is no expectation of significant current or flow allowing no grease movement.

CLOSING

Dominion is seeking the Inspector’s approval to leave in place the idler rollers associated with the Panda and Koala conveyor system at the Ekati mine because the safety concerns associated with removing the idler rollers from the underground outweigh the low potential for environmental effects associated with leaving the idler rollers in place.

Thank you for your consideration of this request. Dominion trusts that the information provided is complete and clear, and we remain available to discuss the closure of underground workings in further detail. If you have any questions or concerns, please feel free to contact the undersigned or Kurtis Trefry at [email protected] or 403-910-1933 ext. 2406.

Sincerely,

April Hayward, Ph.D. Superintendent, Environment

Record #:HSE RCD ENV 1036 Document Owner: Environment Department Date:25-July-2018 Template # EKA TEM 1852.13

Dominion Diamond Ekati ULC 900-606 4 Street SW (403) 910-1933 Calgary, Alberta T2P 1T1 (403) 910-1934 fax www.ddmines.com

Appendix A: Grease Amounts for Luff Industry Rollers at Dominion Diamond Ekati Diamond Mine

Record #:HSE RCD ENV 1036 Document Owner: Environment Department Date:25-July-2018 Template # EKA TEM 1852.13

LUFF INDUSTRIES LTD. 235010 Wrangler Road Rocky View, Alberta, Canada T1X 0K3 P: 403.279.3555 | F: 403.279.5709 TOLL-FREE: 1.888.349.LUFF (5833) www.luffindustries.com

Grease amounts for Luff Industries rollers underground at Dominion Diamond Ekati diamond mine

March 29, 2018

This document is meant to confirm the LACK of possibility of grease escaping from Luff Industries rollers installed underground at Dominion Diamond Ekati diamond mine. Examples of bearings and seals below:

6DS19 6" Steel Roller CEMA D containing a total of 16ml of grease as per below:

- Two 6305 2RS bearings with rubber seals each containing 8ml of Sinopec 7029D grease

CONVEYING PERFORMANCE

LUFF INDUSTRIES LTD. 235010 Wrangler Road Rocky View, Alberta, Canada T1X 0K3 P: 403.279.3555 | F: 403.279.5709 TOLL-FREE: 1.888.349.LUFF (5833) www.luffindustries.com

- Two orange external HMS High Moisture Seals each containing 15ml of Esso Epic EP-102 grease (sample steel roller cutaway shown. Disc return cavity size is the same)

CONVEYING PERFORMANCE

LUFF INDUSTRIES LTD. 235010 Wrangler Road Rocky View, Alberta, Canada T1X 0K3 P: 403.279.3555 | F: 403.279.5709 TOLL-FREE: 1.888.349.LUFF (5833) www.luffindustries.com

CONVEYING PERFORMANCE

LUFF INDUSTRIES LTD. 235010 Wrangler Road Rocky View, Alberta, Canada T1X 0K3 P: 403.279.3555 | F: 403.279.5709 TOLL-FREE: 1.888.349.LUFF (5833) www.luffindustries.com

CONVEYING PERFORMANCE

LUFF INDUSTRIES LTD. 235010 Wrangler Road Rocky View, Alberta, Canada T1X 0K3 P: 403.279.3555 | F: 403.279.5709 TOLL-FREE: 1.888.349.LUFF (5833) www.luffindustries.com

CONVEYING PERFORMANCE

LUFF INDUSTRIES LTD. 235010 Wrangler Road Rocky View, Alberta, Canada T1X 0K3 P: 403.279.3555 | F: 403.279.5709 TOLL-FREE: 1.888.349.LUFF (5833) www.luffindustries.com

CONVEYING PERFORMANCE

LUFF INDUSTRIES LTD. 235010 Wrangler Road Rocky View, Alberta, Canada T1X 0K3 P: 403.279.3555 | F: 403.279.5709 TOLL-FREE: 1.888.349.LUFF (5833) www.luffindustries.com

It can be seen from the photos that the possible exposure to the grease in the bearings would be negligible, due to the rubber seals. For the limited number of rollers fitted with the HMS High Moisture Seals, the possibility of the grease escaping would be minimal based on the circumferential gap of the disc seals to the end of the roller.

If you have any questions, please feel free to contact the undersigned.

Roy Wilks Canadian Sales Manager – Distribution & Engineering www.luffindustries.com Cell: 403-473-0752

CONVEYING PERFORMANCE

Lands - North Slave Region

July 31th 2018

Dominion Diamond Mine Koala Area Mining 900 606 4th St. SW Lease 76D/10-2 Calgary AB, X2P 1T1

Attn: April Hayward – Superintendent, Environment

Re: Underground Closure – Request to leave the underground conveyor system intact following closure

Dear Ms. Hayward,

This letter is in response to a request submitted by Dominion Diamond Mine on July 25th 2018, to leave the entire underground conveyor system intact following closure.

The Inspector has reviewed Dominion Diamond’s request to leave the entire underground conveyor system intact and agrees with the proposal. Removal and disposal of the conveyor system would create legitimate safety concerns with working at heights and in tight quarters. Additional safety risks have been noted using mobile equipment in and around the conveyor system, and the walls and roof of the mine.

Dominion Diamond has demonstrated that leaving the roller bearings in situ will result in a low potential for environmental effects. All idler roller bearings are sealed and grease contained within these bearings will likely remain within the sealed unit. It has also been brought to the Inspectors attention that the water pressure exerted on the bearings will enhance the stability of the grease in situ.

The Inspector has also provided an authorization letter dated July 20th2018 to use non-toxic biodegradable Mobile SHC Grease 102 EAL in the larger serviceable bearings. The Inspector hereby grants authorization to leave the conveyor system intact underground with the following conditions:

• Drain hydraulic oil from all gearboxes, hydraulic take ups, and other units as applicable. All gearboxes, hydraulic take ups and other applicable units in the underground

Government of the Northwest Territories, 140 Bristol Avenue, Yellowknife, N.W.T. Canada X1A 3T2

workings will need to be tagged and documented. This documentation is to be provided to the Inspector and will be inspected prior to final closure. • Purge grease from pulleys and other non-sealed units and replace with Mobile SHC Grease 102 EAL (per GNWT Lands – Authorization to use biodegradable grease underground memorandum - dated 20 July 2018) • All hydrocarbon based grease that is purged from bearing cases and any additional grease that has fallen to the ground is cleaned up and disposed to an approved facility. • The tagging, purging and servicing of all bearings shall be documented. This documentation is to be provided to the Inspector upon request.

Trusting this is satisfactory. If you have any questions or concerns about this decision, please contact the Inspector at (867)-767-9187 ext: 24186.

Sincerely,

Marty Sanderson Manager-Diamond Resource Management GNWT-Department of Lands North Slave Region [email protected]

cc: Mr. Scott Stewart - Regional Superintendent Department of Lands Mr. Kurtis Trefry, Dominion Diamond Mine

Government of the Northwest Territories, 140 Bristol Avenue, Yellowknife, N.W.T. Canada X1A 3T2

Appendix L

Panda/Koala Biodegradable Grease Memo and Authorization

May 17, 2018

North Slave Regional Office Department of Lands Government of the Northwest Territories #16 Yellowknife Airport Yellowknife, NT X1A 3T2

Attention: Marty Sanderson Manager, Diamond Resource Management

Re: Underground Closure – Request to leave biodegradable grease underground following closure Introduction

Koala Underground ore production is scheduled for completion at the end of December 2018. Reclamation of the Koala and Panda Underground workings is required prior to processed kimberlite deposition and pit flooding activities. As a form of progressive reclamation, Dominion plans to utilize biodegradable grease (Mobile SHC Grease 102 EAL) on pullies of the Panda/Koala conveyor system and for any other required purposes. It is anticipated that by following the regular maintenance schedule already in place for underground workings, the majority of grease in the underground workings could be replaced with a biodegradable product that will not need to be purged from the system at closure.

Dominion’s intention is to leave the product in place upon closure of underground working and Dominion is seeking the Inspector’s approval to do so. Domionion’s decision to use Mobile SHC Grease 102 EAL and leave the product in place in the underground at closure is based on the fact that it is non hazardous and is classified as readily biodegradable as described in greater detail, below.

Lubricant Biodegradability Testing

Biodegredation is the chemical breakdown of materials by living organisms (or their enzymes) in the environment. Certain chemical structures are more susceptible to microbial breakdown than others; vegetable oils and synthetic esters, for example, will biodegrade more rapidly than mineral oils under the same conditions.

Ultimately, biodegradation testing is used to determine if a material is inherently biodegradable or readily biodegrdable. OECD (Organisation for Economic Co-operation and Development) classifications give a value for the percentage of lubricant biodegradable within 28 days. Below are the requirements under the OECD testing to fit into either category:

Record #:HSE RCD ENV 974 Document Owner: Environment Department Date:18-May-2018 Template # EKA TEM 1852.13 Dominion Diamond Ekati ULC 900-606 4 Street SW (403) 910-1933 Calgary, Alberta T2P1T1 (403) 910-1934 fax www.ddmines.com

Readily Biodegradable  Must achieve greater than 60% biodegradation in 28 days  Must pass the “10-day” window criterion, which means that once the 10% biodegradation has been attained, test material must then reach the 60% biodegradation mark within 10 days

Inherently biodegradable  Must achieve greater than 20% biodegradation within the 28 days

Mobile SHC Grease 102 EAL - Specifications

The Mobile SHC Grease 102 EAL was selected for the Panda/Koala Underground working because of its specific design for applications that require environmentally sensitive lubricants. Mobile SHC Grease 102 EAL is not considerd to be hazardous according to the MSDS and is classified as readily biodegradable with 74% biodegraded within 28 days. For an overview of the product benefits and specifications view Table 1. Please see Appendix A (Mobile SHC Grease 100 EAL Series) and Appendix B (MSDS Mobil SHC Grease 102 EAL) for further information.

Table 1: Product Specifications (Mobil, 2017) Property Mobile SHC Grease 102 EAL NLGI Grade 2 Thickener Type Lithium Color, Visual Tan ISO Viscosity Grade of Oil 100 Dropping Point, ASTM D 2265, ºC 180 Worked Penetration, ASTM D 217, mm/10 @ 280 25°C Water Washout @ 79ºC, ASTM D 1264, wt% 6.5 EMCOR Bearing Corrosion in Distilled Water, 0,0 ASTM D 6138, Rating Copper Corrosion, ASTM D 4048, Rating la Four Ball Weld, ASTM D 2596, kgf 200 Four Ball Load Wear Index, ASTM D 2596, kgf 34 US Steel Mobility @ -18°C, g/min 50 Low Temperature Torque @ -30°C, Start/Run, 800/170 ASTM D 1478, gcm Biodegradability of ester base oil, OECD 301B, 74 (Readily biodegradable) wt% Aquatic Toxicity, OECD 203, LL50 ppm >10000 (Virtually non-toxic)

Product Implementation and Documentation

The ultilization of Mobil SHC Grease 102 EAL in the underground workings is intended to be a form of progressive reclamation. Dominion plans to replace current greasing systems in the

Record #:HSE RCD ENV 974 Document Owner: Environment Department Date:18-May-2018 Template # EKA TEM 1852.13

Dominion Diamond Ekati ULC 900-606 4 Street SW (403) 910-1933 Calgary, Alberta T2P1T1 (403) 910-1934 fax www.ddmines.com

Panda/Koala Underground with the product with the intention of leaving the biodegradable, non- toxic, non-hazardous grease in place during processed kimberlite deposition and pit flooding activities. Grease will be replaced as required by current maintenance schedules, but it is anticipated that all grease will be replaced with Mobil SHC Grease 102 EAL by the end of operations in December 2018.

Dominion is commited to maintaining an adequate level of documentation to ensure the inspectors that only biodegradable grease will remain in the underground workings. In addition, a tagging system will be developed to aid in visual confirmation as to which components have been purged and replaced with Mobil SHC Grease 102. Dominion will show examples of the tagging systems and progressive reclamation through grease exchanges to GNWT Inspectors during future Panda/Koala Underground inspections leading towards final closure.

Closing

Dominion is seeking the Inspector’s approval leave Mobil SHC Grease 102 EAL in the underground workings at closure. The Mobil SHC Grease 102 EAL is a proven product that would provide no environmental risk to water quality after the flooding of underground workings. Dominion intends to utilize this product wherever feasible for the underground workings.

Dominion would like to secure the Inspector’s approval to leave Mobil SHC Grease 102 EAL in place at closure before beginning the transition to using Mobil SHC Grease 102 EAL in the underground workings. The transition to Mobil SHC Grease 102 EAL is scheduled to begin in the latter half of June, 2018.

Thank you for your consideration of this request. Dominion trusts that the information provided is complete and clear, and we remain available to discuss the progressive reclamation practice in further detail. If you have any questions, please feel free to contact the undersigned or Kurtis Trefry at [email protected] or 403-910-1933 ext. 2406.

Sincerely,

April Hayward, Ph.D. Superintendent, Environment

Record #:HSE RCD ENV 974 Document Owner: Environment Department Date:18-May-2018 Template # EKA TEM 1852.13

Dominion Diamond Ekati ULC 900-606 4 Street SW (403) 910-1933 Calgary, Alberta T2P1T1 (403) 910-1934 fax www.ddmines.com

Appendix A: Mobile SHC Grease 100 EAL Series

Record #:HSE RCD ENV 930 Document Owner: Environment Department Date:16-March-2018 Template # EKA TEM 1852.13

Mobil SHC™ Grease 100 EAL Series Page 1 of 3

Mobil SHC™ Grease 100 EAL Series

Grease Mobil, Canada

Grease

Product Description

Mobil SHC™ Grease 101 EAL and 102 EAL are superior performance greases designed specifically for applications that require environmentally sensitive lubricants. These high performance greases are biodegradable and virtually non-toxic. They are formulated from a biodegradable synthetic ester base oil, carefully chosen high performance additives and a lithium soap thickener. The wax-free nature of the synthetic base fluid, together with its low traction coefficient, provide excellent low temperature pumpability and very low starting and running torque - a significant benefit considering that many environmentally sensitive applications are outdoors.

The Mobil SHC Grease 100 EAL Series is formulated for applications where grease leakage or run out could contaminate soil, groundwater, surface water systems, or indoor plant water systems. They are recommended for plain and rolling element bearings and couplings that operate at temperatures from -40ºC to 120ºC, with appropriate adjustments to re-lubrication interval. Mobil SHC Grease 101 EAL and 102 EAL are NLGI grade 1 and 2 respectively.

Features and Potential Benefits

The Mobil™ EAL brand of environmentally sensitive products has gained an exceptional reputation with OEMs and customers for its excellent performance. These greases provide the optimum balance between the need for environmentally friendly lubricants and the requirement for high performance lubricants for mobile and stationary mechanical equipment Mobil SHC Grease 100 EAL Series greases are compatible with the previous generation Mobilgrease EAL 100 Series.

Mobil SHC Grease 101 EAL and 102 EAL offer the following benefits:

Features Advantages and Potential Benefits Virtually non-toxic in the OECD 203 Minimal effects of spills on environment Method Aquatic Toxicity Test Biodegradation of material in sensitive areas with minimal Formulated from biodegradable non-biodegradable residue, avoidance of costly clean-up in some synthetic ester base oil jurisdictions Good adhesion and water resistance Resists water washout, avoiding need for frequent re-greasing Excellent rust and corrosion protection Excellent bearing protection in wet conditions, with long bearing life

https://www.mobil.com/English-CA/Grease/pds/GLXXMobil-SHC-Grease-100-EAL-Series?p=1 10.04.2017 Mobil SHC™ Grease 100 EAL Series Page 2 of 3

Applications

Mobil SHC Grease 101 EAL and 102 EAL are members of the Mobil family of Environmental Awareness Lubricants (EAL) and are specifically designed for applications where contamination of the environment is a risk.

Marine equipment Water treatment plants Dams, locks and water ways Construction equipment Farm machinery Hydroelectric generation plants

Specifications and Approvals

Mobil SHC Grease 100 EAL meets or exceeds the requirements of: 101 102 DIN 51825: (2004-06) KPE1K-40 KPE2K-40

Typical Properties

Mobil SHC 100 Grease EAL Series 101 102 NLGI Grade 1 2 Thickener Type Lithium Lithium Color, Visual Tan Tan ISO Viscosity Grade of Oil 100 100 Dropping Point, ASTM D 2265, ºC 180 180 Worked Penetration, ASTM D 217, mm/10 @ 25°C 325 280 Water Washout @ 79ºC, ASTM D 1264, wt% 8.0 6.5 EMCOR Bearing Corrosion in Distilled Water, ASTM D 6138, Rating 0,0 0,0 Copper Corrosion, ASTM D 4048, Rating 1a 1a Four Ball Weld, ASTM D 2596, kgf 200 200 Four Ball Load Wear Index, ASTM D 2596, kgf 35 34 US Steel Mobility @ -18°C, g/min - 50 Low Temperature Torque @ -30°C, Start/Run, ASTM D 1478, gcm - 800/170 Biodegradability of ester base oil, OECD 301B, wt% 74 74 Aquatic Toxicity, OECD 203, LL50 ppm >10000 >10000 https://www.mobil.com/English-CA/Grease/pds/GLXXMobil-SHC-Grease-100-EAL-Series?p=1 10.04.2017 Mobil SHC™ Grease 100 EAL Series Page 3 of 3

Health and Safety

Based on available information, this product is not expected to produce adverse effects on health when used for the intended application and the recommendations provided in the Material Safety Data Sheet (MSDS) are followed. MSDS's are available upon request through your sales contract office, or via the Internet. This product should not be used for purposes other than its intended use. If disposing of used product, take care to protect the environment.

All trademarks used herein are trademarks or registered trademarks of Exxon Mobil Corporation or one of its subsidiaries unless indicated otherwise.

09-2016

Imperial Oil Petroleum and Chemicals Division Lubricants and Specialties 240 Fourth Ave SW C. P. 2480, Station M Calgary AB T2P 3 M 9

1-800-268-3183

Typical Properties are typical of those obtained with normal production tolerance and do not constitute a specification. Variations that do not affect product performance are to be expected during normal manufacture and at different blending locations. The information contained herein is subject to change without notice. All products may not be available locally. For more information, contact your local ExxonMobil contact or visit www.exxonmobil.com ExxonMobil is comprised of numerous affiliates and subsidiaries, many with names that include Esso, Mobil, or ExxonMobil. Nothing in this document is intended to override or supersede the corporate separateness of local entities. Responsibility for local action and accountability remains with the local ExxonMobil-affiliate entities.

https://www.mobil.com/English-CA/Grease/pds/GLXXMobil-SHC-Grease-100-EAL-Series?p=1 10.04.2017 Dominion Diamond Ekati ULC 900-606 4 Street SW (403) 910-1933 Calgary, Alberta T2P1T1 (403) 910-1934 fax www.ddmines.com

Appendix B: MSDS - Mobil SHC Grease 102 EAL

Record #:HSE RCD ENV 930 Document Owner: Environment Department Date:16-March-2018 Template # EKA TEM 1852.13

Product Name: MOBIL SHC GREASE 102 EAL Revision Date: 21 Mar 2011 Page 1 of 9

______

MATERIAL SAFETY DATA SHEET

SECTION 1 PRODUCT AND COMPANY IDENTIFICATION

PRODUCT Product Name: MOBIL SHC GREASE 102 EAL Product Description: Synthetic Base Stocks and Additives Product Code: 2015A0203080, 643882-00, 97AZ30 Intended Use: Grease

COMPANY IDENTIFICATION Supplier: EXXON MOBIL CORPORATION 3225 GALLOWS RD. FAIRFAX, VA. 22037 USA 24 Hour Health Emergency 609-737-4411 Transportation Emergency Phone 800-424-9300 ExxonMobil Transportation No. 281-834-3296 Product Technical Information 800-662-4525, 800-947-9147 MSDS Internet Address http://www.exxon.com, http://www.mobil.com

SECTION 2 COMPOSITION / INFORMATION ON INGREDIENTS

No Reportable Hazardous Substance(s) or Complex Substance(s).

SECTION 3 HAZARDS IDENTIFICATION

This material is not considered to be hazardous according to regulatory guidelines (see (M)SDS Section 15).

POTENTIAL HEALTH EFFECTS Low order of toxicity. Excessive exposure may result in eye, skin, or respiratory irritation. High-pressure injection under skin may cause serious damage.

NFPA Hazard ID: Health: 0 Flammability: 1 Reactivity: 0 HMIS Hazard ID: Health: 0 Flammability: 1 Reactivity: 0

NOTE: This material should not be used for any other purpose than the intended use in Section 1 without expert advice. Health studies have shown that chemical exposure may cause potential human health risks which may vary from person to person.

SECTION 4 FIRST AID MEASURES

INHALATION Under normal conditions of intended use, this material is not expected to be an inhalation hazard.

Product Name: MOBIL SHC GREASE 102 EAL Revision Date: 21 Mar 2011 Page 2 of 9

______

SKIN CONTACT Wash contact areas with soap and water. If product is injected into or under the skin, or into any part of the body, regardless of the appearance of the wound or its size, the individual should be evaluated immediately by a physician as a surgical emergency. Even though initial symptoms from high pressure injection may be minimal or absent, early surgical treatment within the first few hours may significantly reduce the ultimate extent of injury.

EYE CONTACT Flush thoroughly with water. If irritation occurs, get medical assistance.

INGESTION First aid is normally not required. Seek medical attention if discomfort occurs.

SECTION 5 FIRE FIGHTING MEASURES

EXTINGUISHING MEDIA Appropriate Extinguishing Media: Use water fog, foam, dry chemical or carbon dioxide (CO2) to extinguish flames.

Inappropriate Extinguishing Media: Straight Streams of Water

FIRE FIGHTING Fire Fighting Instructions: Evacuate area. Prevent runoff from fire control or dilution from entering streams, sewers, or drinking water supply. Firefighters should use standard protective equipment and in enclosed spaces, self-contained breathing apparatus (SCBA). Use water spray to cool fire exposed surfaces and to protect personnel.

Hazardous Combustion Products: Smoke, Fume, Aldehydes, Sulfur oxides, Incomplete combustion products, Oxides of carbon

FLAMMABILITY PROPERTIES Flash Point [Method]: 232C (450F) [EST. FOR OIL, ASTM D-92 (COC)] Flammable Limits (Approximate volume % in air): LEL: N/D UEL: N/D Autoignition Temperature: N/D

SECTION 6 ACCIDENTAL RELEASE MEASURES

NOTIFICATION PROCEDURES In the event of a spill or accidental release, notify relevant authorities in accordance with all applicable regulations. US regulations require reporting releases of this material to the environment which exceed the applicable reportable quantity or oil spills which could reach any waterway including intermittent dry creeks. The National Response Center can be reached at (800)424-8802.

PROTECTIVE MEASURES Avoid contact with spilled material. See Section 5 for fire fighting information. See the Hazard Identification Section for Significant Hazards. See Section 4 for First Aid Advice. See Section 8 for advice on the minimum

Product Name: MOBIL SHC GREASE 102 EAL Revision Date: 21 Mar 2011 Page 3 of 9

______requirements for personal protective equipment. Additional protective measures may be necessary, depending on the specific circumstances and/or the expert judgment of the emergency responders.

SPILL MANAGEMENT Land Spill: Scrape up spilled material with shovels into a suitable container for recycle or disposal.

Water Spill: Stop leak if you can do it without risk. Confine the spill immediately with booms. Warn other shipping. Skim from surface.

Water spill and land spill recommendations are based on the most likely spill scenario for this material; however, geographic conditions, wind, temperature, (and in the case of a water spill) wave and current direction and speed may greatly influence the appropriate action to be taken. For this reason, local experts should be consulted. Note: Local regulations may prescribe or limit action to be taken.

ENVIRONMENTAL PRECAUTIONS Prevent entry into waterways, sewers, basements or confined areas.

SECTION 7 HANDLING AND STORAGE

HANDLING Prevent small spills and leakage to avoid slip hazard.

Static Accumulator: This material is not a static accumulator.

STORAGE Do not store in open or unlabelled containers. Keep away from incompatible materials.

SECTION 8 EXPOSURE CONTROLS / PERSONAL PROTECTION

NOTE: Limits/standards shown for guidance only. Follow applicable regulations.

ENGINEERING CONTROLS

The level of protection and types of controls necessary will vary depending upon potential exposure conditions. Control measures to consider: No special requirements under ordinary conditions of use and with adequate ventilation.

PERSONAL PROTECTION

Personal protective equipment selections vary based on potential exposure conditions such as applications, handling practices, concentration and ventilation. Information on the selection of protective equipment for use with this material, as provided below, is based upon intended, normal usage.

Respiratory Protection: If engineering controls do not maintain airborne contaminant concentrations at a level which is adequate to protect worker health, an approved respirator may be appropriate. Respirator

Product Name: MOBIL SHC GREASE 102 EAL Revision Date: 21 Mar 2011 Page 4 of 9

______selection, use, and maintenance must be in accordance with regulatory requirements, if applicable. Types of respirators to be considered for this material include: No protection is ordinarily required under normal conditions of use and with adequate ventilation.

For high airborne concentrations, use an approved supplied-air respirator, operated in positive pressure mode. Supplied air respirators with an escape bottle may be appropriate when oxygen levels are inadequate, gas/vapor warning properties are poor, or if air purifying filter capacity/rating may be exceeded.

Hand Protection: Any specific glove information provided is based on published literature and glove manufacturer data. Glove suitability and breakthrough time will differ depending on the specific use conditions. Contact the glove manufacturer for specific advice on glove selection and breakthrough times for your use conditions. Inspect and replace worn or damaged gloves. The types of gloves to be considered for this material include: No protection is ordinarily required under normal conditions of use.

Eye Protection: If contact is likely, safety glasses with side shields are recommended.

Skin and Body Protection: Any specific clothing information provided is based on published literature or manufacturer data. The types of clothing to be considered for this material include: No skin protection is ordinarily required under normal conditions of use. In accordance with good industrial hygiene practices, precautions should be taken to avoid skin contact.

Specific Hygiene Measures: Always observe good personal hygiene measures, such as washing after handling the material and before eating, drinking, and/or smoking. Routinely wash work clothing and protective equipment to remove contaminants. Discard contaminated clothing and footwear that cannot be cleaned. Practice good housekeeping.

ENVIRONMENTAL CONTROLS See Sections 6, 7, 12, 13.

SECTION 9 PHYSICAL AND CHEMICAL PROPERTIES

Typical physical and chemical properties are given below. Consult the Supplier in Section 1 for additional data.

GENERAL INFORMATION Physical State: Solid Form: Semi-fluid Color: Tan Odor: Characteristic Odor Threshold: N/D

IMPORTANT HEALTH, SAFETY, AND ENVIRONMENTAL INFORMATION Relative Density (at 15 C): 0.97 Flash Point [Method]: 232C (450F) [EST. FOR OIL, ASTM D-92 (COC)] Flammable Limits (Approximate volume % in air): LEL: N/D UEL: N/D Autoignition Temperature: N/D Boiling Point / Range: > 316C (600F) [Estimated] Vapor Density (Air = 1): N/D Vapor Pressure: < 0.013 kPa (0.1 mm Hg) at 20 C [Estimated] Evaporation Rate (n-butyl acetate = 1): N/D

Product Name: MOBIL SHC GREASE 102 EAL Revision Date: 21 Mar 2011 Page 5 of 9

______pH: N/A Log Pow (n-Octanol/Water Partition Coefficient): N/D Solubility in Water: Negligible Viscosity: 100 cSt (100 mm2/sec) at 40 C [Base oil] Oxidizing Properties: See Hazards Identification Section.

OTHER INFORMATION Freezing Point: N/D Melting Point: N/D Decomposition Temperature: N/D

NOTE: Most physical properties above are for the oil component in the material.

SECTION 10 STABILITY AND REACTIVITY

STABILITY: Material is stable under normal conditions.

CONDITIONS TO AVOID: Excessive heat. High energy sources of ignition.

MATERIALS TO AVOID: Strong oxidizers

HAZARDOUS DECOMPOSITION PRODUCTS: Material does not decompose at ambient temperatures.

HAZARDOUS POLYMERIZATION: Will not occur.

SECTION 11 TOXICOLOGICAL INFORMATION

ACUTE TOXICITY Route of Exposure Conclusion / Remarks Inhalation Toxicity (Rat): LC50 > 5000 or MAC Minimally Toxic. Based on assessment of the components. mg/m3 Irritation: No end point data. Negligible hazard at ambient/normal handling temperatures. Based on assessment of the components.

Ingestion Toxicity (Rat): LD50 > 5000 mg/kg Minimally Toxic. Based on assessment of the components.

Skin Toxicity (Rabbit): LD50 > 5000 mg/kg Minimally Toxic. Based on assessment of the components. Irritation (Rabbit): Data available. Negligible irritation to skin at ambient temperatures. Based on assessment of the components.

Eye Irritation (Rabbit): Data available. May cause mild, short-lasting discomfort to eyes. Based on assessment of the components.

CHRONIC/OTHER EFFECTS Contains: Synthetic base oils: Not expected to cause significant health effects under conditions of normal use, based on laboratory studies with the same or similar materials. Not mutagenic or genotoxic. Not sensitizing in test animals and humans.

Product Name: MOBIL SHC GREASE 102 EAL Revision Date: 21 Mar 2011 Page 6 of 9

______

Additional information is available by request.

The following ingredients are cited on the lists below: None.

--REGULATORY LISTS SEARCHED-- 1 = NTP CARC 3 = IARC 1 5 = IARC 2B 2 = NTP SUS 4 = IARC 2A 6 = OSHA CARC

SECTION 12 ECOLOGICAL INFORMATION

The information given is based on data available for the material, the components of the material, and similar materials.

ECOTOXICITY Material -- Not expected to be harmful to aquatic organisms.

MOBILITY Base oil component -- Low solubility and floats and is expected to migrate from water to the land. Expected to partition to sediment and wastewater solids.

SECTION 13 DISPOSAL CONSIDERATIONS

Disposal recommendations based on material as supplied. Disposal must be in accordance with current applicable laws and regulations, and material characteristics at time of disposal.

DISPOSAL RECOMMENDATIONS Product is suitable for burning in an enclosed controlled burner for fuel value or disposal by supervised incineration at very high temperatures to prevent formation of undesirable combustion products.

REGULATORY DISPOSAL INFORMATION RCRA Information: The unused product, in our opinion, is not specifically listed by the EPA as a hazardous waste (40 CFR, Part 261D), nor is it formulated to contain materials which are listed as hazardous wastes. It does not exhibit the hazardous characteristics of ignitability, corrositivity or reactivity and is not formulated with contaminants as determined by the Toxicity Characteristic Leaching Procedure (TCLP). However, used product may be regulated.

Empty Container Warning Empty Container Warning (where applicable): Empty containers may contain residue and can be dangerous. Do not attempt to refill or clean containers without proper instructions. Empty drums should be completely drained and safely stored until appropriately reconditioned or disposed. Empty containers should be taken for recycling, recovery, or disposal through suitably qualified or licensed contractor and in accordance with governmental regulations. DO NOT PRESSURISE, CUT, WELD, BRAZE, SOLDER, DRILL, GRIND, OR EXPOSE SUCH CONTAINERS TO HEAT, FLAME, SPARKS, STATIC ELECTRICITY, OR OTHER SOURCES OF IGNITION. THEY MAY EXPLODE AND CAUSE INJURY OR DEATH.

Product Name: MOBIL SHC GREASE 102 EAL Revision Date: 21 Mar 2011 Page 7 of 9

______

SECTION 14 TRANSPORT INFORMATION

LAND (DOT): Not Regulated for Land Transport

LAND (TDG): Not Regulated for Land Transport

SEA (IMDG): Not Regulated for Sea Transport according to IMDG-Code

AIR (IATA): Not Regulated for Air Transport

SECTION 15 REGULATORY INFORMATION

OSHA HAZARD COMMUNICATION STANDARD: When used for its intended purposes, this material is not classified as hazardous in accordance with OSHA 29 CFR 1910.1200.

Complies with the following national/regional chemical inventory requirements:: EINECS, DSL, TSCA

EPCRA: This material contains no extremely hazardous substances.

SARA (311/312) REPORTABLE HAZARD CATEGORIES: None.

SARA (313) TOXIC RELEASE INVENTORY: This material contains no chemicals subject to the supplier notification requirements of the SARA 313 Toxic Release Program.

The following ingredients are cited on the lists below:

Chemical Name CAS Number List Citations ZINC, 15337-18-5 15 BIS(DIPENTYLCARBAMODITHIO ATO-S,S)-, (T-4)-

--REGULATORY LISTS SEARCHED-- 1 = ACGIH ALL 6 = TSCA 5a2 11 = CA P65 REPRO 16 = MN RTK 2 = ACGIH A1 7 = TSCA 5e 12 = CA RTK 17 = NJ RTK 3 = ACGIH A2 8 = TSCA 6 13 = IL RTK 18 = PA RTK 4 = OSHA Z 9 = TSCA 12b 14 = LA RTK 19 = RI RTK 5 = TSCA 4 10 = CA P65 CARC 15 = MI 293

Code key: CARC=Carcinogen; REPRO=Reproductive

SECTION 16 OTHER INFORMATION N/D = Not determined, N/A = Not applicable

Product Name: MOBIL SHC GREASE 102 EAL Revision Date: 21 Mar 2011 Page 8 of 9

______

THIS SAFETY DATA SHEET CONTAINS THE FOLLOWING REVISIONS: Revision Changes: Section 10 Stability and Reactivity - Header was modified. Section 13: Disposal Recommendations - Note was modified. Section 11: Inhalation Lethality Conclusion was modified. Section 09: Boiling Point C(F) was modified. Section 08: Personal Protection was modified. Section 07: Handling and Storage - Handling was modified. Section 07: Handling and Storage - Storage Phrases was modified. Section 11: Dermal Lethality Test Data was modified. Section 11: Dermal Lethality Test Comment was modified. Section 11: Oral Lethality Test Data was modified. Section 11: Inhalation Lethality Test Data was modified. Section 11: Oral Lethality Test Comment was modified. Section 11: Inhalation Lethality Test Comment was modified. Section 06: Accidental Release - Spill Management - Water was modified. Section 09: Relative Density - Header was modified. Section 09: Flash Point C(F) was modified. Section 09: Viscosity was modified. Section 14: Sea (IMDG) - Header was modified. Section 14: Air (IATA) - Header was modified. Section 14: LAND (TDG) - Header was modified. Section 14: LAND (DOT) - Header was modified. Section 15: List Citation Table - Header was modified. Section 14: LAND (DOT) - Default was modified. Section 14: LAND (TDG) Default was modified. Section 14: Sea (IMDG) - Default was modified. Section 14: Air (IATA) - Default was modified. Section 11: Skin Irritation Conclusion was modified. Section 11: Inhalation Lethality Test Comment was modified. Section 15: National Chemical Inventory Listing - Header was modified. Section 15: National Chemical Inventory Listing was modified. Section 16: Code to MHCs was modified. Section 08: Exposure limits/standards was modified. Section 15: OSHA Hazard Communication Standard was modified. Hazard Identification: OSHA - May be Hazardous Statement was modified. Section 11: Chronic Tox - Component - Header was modified. Section 09: Oxidizing Properties was modified. Section 06: Protective Measures was added. Section 06: Accidental Release - Protective Measures - Header was added. Section 11: Other Health Effects Header was added. Section 11: Chronic Tox - Component was added. Section 09: Decomposition Temperature was added. Section 09: Decomposition Temp - Header was added. Section 09: Vapor Pressure was added. ------The information and recommendations contained herein are, to the best of ExxonMobil's knowledge and belief, accurate and reliable as of the date issued. You can contact ExxonMobil to insure that this document is the most current available from ExxonMobil. The information and recommendations are offered for the user's consideration and examination. It is the user's responsibility to satisfy itself that the product is suitable for the intended use. If buyer

Product Name: MOBIL SHC GREASE 102 EAL Revision Date: 21 Mar 2011 Page 9 of 9

______repackages this product, it is the user's responsibility to insure proper health, safety and other necessary information is included with and/or on the container. Appropriate warnings and safe-handling procedures should be provided to handlers and users. Alteration of this document is strictly prohibited. Except to the extent required by law, re- publication or retransmission of this document, in whole or in part, is not permitted. The term, "ExxonMobil" is used for convenience, and may include any one or more of ExxonMobil Chemical Company, Exxon Mobil Corporation, or any affiliates in which they directly or indirectly hold any interest.

------

Internal Use Only MHC: 0B, 0B, 0, 0, 0, 0 PPEC: A

Lands- North Slave Region

July 20th 2018

Dominion Diamond Mine Koala Area Mining 900 606 4th St. SW Lease 76D/10-2 Calgary AB, X2P 1T1

Attn: April Hayward – Superintendent, Environment

Re: Underground Closure – Request to leave biodegradable grease underground following closure

Dear Ms. Hayward,

This letter is in response to a request submitted by Dominion Diamond Mine on May 17th 2018, to leave biodegradable grease underground following closure.

On May 17th 2018 Dominion Diamond submitted a proposal to replace all the grease used to service the underground crusher and conveyor system with a biodegradable alternative (Mobile SHC Grease 102 EAL). The intention is that with the approval of the Inspector, the grease can be left underground after closure rather than have to remove the bearings or flush them out.

On July 17th 2018, the Inspector was accompanied by Dominion Diamond personnel during an inspection of the Panda/Koala underground workings. One of the purposes of this inspection was to become familiar with the location, size, volume and quantity of bearings that will be serviced with the biodegradable grease.

Dominion Diamond personnel demonstrated the grease purging process to the Inspector, on one of the larger bearings attached to a sizer/crusher component. Dominion Diamond Mine will be purging the grease on all bearings initially and then service the bearings on a regular weekly schedule with the non-toxic biodegradable grease.

The Inspector was informed that there are a total of 76 large bearings, and 22 smaller bearings located at the sizer/crusher on Level 1950, and along an additional six conveyors that run to the surface. The Inspector was also informed that all bearings will be physically tagged and a detailed log will be maintained on purging and greasing service intervals.

Government of the Northwest Territories, 140 Bristol Avenue, Yellowknife, N.W.T. Canada X1A 3T2

The Inspector has reviewed the Mobile SHC Grease 102 EAL product description and is satisfied with the non-toxic specifications of this product and hereby grants authorization to use this product subject to the following conditions:

• The use of Mobile SHC Grease 102 AEL is the only approved product for this application/proposal. • All hydrocarbon based grease that is purged from bearing cases and any additional grease that has fallen to the ground is cleaned up and disposed to an approved facility. • The tagging, purging and servicing of all bearings shall be documented. This documentation is to be provided to the Inspector upon request.

Trusting this is satisfactory. If you have any questions or concerns about this decision, please contact the Inspector at (867)-767-9187 ext: 24186.

Sincerely,

Marty Sanderson Manager-Diamond Resource Management GNWT-Department of Lands North Slave Region [email protected]

cc: Mr. Scott Stewart - Regional Superintendent Department of Lands Mr. Kurtis Trefry, Dominion Diamond Mine

Government of the Northwest Territories, 140 Bristol Avenue, Yellowknife, N.W.T. Canada X1A 3T2