RE: Approval for use of Cell D water for Misery Road, Misery Camp, and Misery Pit Roads.

Transcription

1 May 28, 2015 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 Dear Mr. Sanderson: RE: Approval for use of Cell D water for Misery Road, Misery Camp, and Misery Pit Roads. A water sample (RW1) was collected from Cell D on 5 th May 2015 and sent to ALS Laboratories for analysis. The RW1 sample results indicate that the regulated parameters are below the effluent water quality requirements set out in part H, item 12(a) in Water License W2012L L Cell D (RW1) Max Concentration of 05-MAY-15 10:47 Any Grab Sample (mg/l) Analyte Units Water Dissolved Aluminum mg/l Total Antimony mg/l Total Arsenic mg/l Chloride mg/l Nitrate N mg/l Nitrite N mg/l < Potassium mg/l Total Selenium mg/l Total Strontium mg/l Sulphate mg/l TSS mg/l < TPH mg/l < Hardness mg/l 152 (used to for calculating EQCs for Nitrate-N, Chloride and Sulphate) Record #: HSE RCD ENV 85 Document Owner: Environment Department Date: Template # EKA TEM

2 Dominion Diamond Ekati Corporation (DDEC) is requesting authorization to use the Cell D water for the purpose of road watering of Misery Road, Misery Camp, and Misery Pit Roads. We trust that this information meets with your requirements at this time. If you have any questions, please contact the undersigned. Sincerely, Richard Ehlert Team Leader Environment Attached: Laboratory Certificate L Record #: HSE RCD ENV 85 Document Owner: Environment Department Client Phone: Date: Template # EKA TEM

3 Dominion Diamond Ekati Corporation (DDEC) ATTN: David G. Bruce / Richard Ehlert David # nd Street Yellowknife NT X1A 3T1 Certificate of Analysis Lab Work Order #: L Project P.O. #: EKA Job Reference: 1005 C of C Numbers: Legal Site Desc: Date Received: 07-MAY-15 Report Date: Version: 14-MAY-15 16:08 (MT) FINAL 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: Fax: ALS CANADA LTD Part of the ALS Group A Campbell Brothers Limited Company

4 L CONTD... PAGE 2 of 8 ALS ENVIRONMENTAL ANALYTICAL REPORT Version: FINAL Sample ID Description Sampled Date Sampled Time Client ID L water 05-MAY-15 10:47 RW1 L water 05-MAY-15 14:49 RW2 Grouping Analyte WATER Physical Tests Conductivity (us/cm) Hardness (as CaCO3) (mg/l) ph (ph) Total Suspended Solids (mg/l) Total Dissolved Solids (mg/l) Turbidity (NTU) < Anions and Nutrients Organic / Inorganic Carbon Alkalinity, Total (as CaCO3) (mg/l) Ammonia, Total (as N) (mg/l) Chloride (Cl) (mg/l) Fluoride (F) (mg/l) Nitrate and Nitrite (as N) (mg/l) Nitrate (as N) (mg/l) Nitrite (as N) (mg/l) Total Kjeldahl Nitrogen (mg/l) Orthophosphate-Dissolved (as P) (mg/l) Phosphorus (P)-Total Dissolved (mg/l) Phosphorus (P)-Total (mg/l) Silicate (as SiO2) (mg/l) Sulfate (SO4) (mg/l) Total Carbon (mg/l) < < TKNI < < <0.025 <0.025 < < Total Organic Carbon (mg/l) * Please refer to the Reference Information section for an explanation of any qualifiers detected.

5 Total Metals ALS ENVIRONMENTAL ANALYTICAL REPORT Aluminum (Al)-Total (mg/l) L CONTD... PAGE 3 of 8 Version: FINAL Antimony (Sb)-Total (mg/l) Arsenic (As)-Total (mg/l) Barium (Ba)-Total (mg/l) Beryllium (Be)-Total (mg/l) Boron (B)-Total (mg/l) Cadmium (Cd)-Total (mg/l) Calcium (Ca)-Total (mg/l) Chromium (Cr)-Total (mg/l) Cobalt (Co)-Total (mg/l) Copper (Cu)-Total (mg/l) Iron (Fe)-Total (mg/l) Lead (Pb)-Total (mg/l) Magnesium (Mg)-Total (mg/l) Manganese (Mn)-Total (mg/l) < < <0.030 < < Sample ID Description Sampled Date Sampled Time Client ID L water 05-MAY-15 10:47 RW1 L water 05-MAY-15 14:49 RW2 Grouping Analyte WATER < < Total Metals Mercury (Hg)-Total (mg/l) Molybdenum (Mo)-Total (mg/l) Nickel (Ni)-Total (mg/l) Potassium (K)-Total (mg/l) Selenium (Se)-Total (mg/l) Silicon (Si)-Total (mg/l) < Silver (Ag)-Total (mg/l) Sodium (Na)-Total (mg/l) Strontium (Sr)-Total (mg/l) Uranium (U)-Total (mg/l) Vanadium (V)-Total (mg/l) < Zinc (Zn)-Total (mg/l) LAB LAB * Please refer to the Reference Information section for an explanation of any qualifiers detected.

6 Dissolved Metals ALS ENVIRONMENTAL ANALYTICAL REPORT Dissolved Mercury Filtration Location LAB LAB L CONTD... PAGE 4 of 8 Version: FINAL Dissolved Metals Filtration Location Aluminum (Al)-Dissolved (mg/l) Antimony (Sb)-Dissolved (mg/l) Arsenic (As)-Dissolved (mg/l) Barium (Ba)-Dissolved (mg/l) Beryllium (Be)-Dissolved (mg/l) Boron (B)-Dissolved (mg/l) Cadmium (Cd)-Dissolved (mg/l) Chromium (Cr)-Dissolved (mg/l) Cobalt (Co)-Dissolved (mg/l) Copper (Cu)-Dissolved (mg/l) Iron (Fe)-Dissolved (mg/l) Lead (Pb)-Dissolved (mg/l) Manganese (Mn)-Dissolved (mg/l) Mercury (Hg)-Dissolved (mg/l) Molybdenum (Mo)-Dissolved (mg/l) Nickel (Ni)-Dissolved (mg/l) Selenium (Se)-Dissolved (mg/l) Silicon (Si)-Dissolved (mg/l) Silver (Ag)-Dissolved (mg/l) Strontium (Sr)-Dissolved (mg/l) Uranium (U)-Dissolved (mg/l) Vanadium (V)-Dissolved (mg/l) Zinc (Zn)-Dissolved (mg/l) < < <0.030 < < < < < < < < < Sample ID Description Sampled Date Sampled Time Client ID L water 05-MAY-15 10:47 RW1 L water 05-MAY-15 14:49 RW2 Grouping Analyte WATER Volatile Organic Compounds Benzene (mg/l) Ethylbenzene (mg/l) Styrene (mg/l) Toluene (mg/l) ortho-xylene (mg/l) meta- & para-xylene (mg/l) Xylenes (mg/l) Surrogate: 4-Bromofluorobenzene (SS) (%) Surrogate: 1,4-Difluorobenzene (SS) (%) < <0.10 < <0.10 * Please refer to the Reference Information section for an explanation of any qualifiers detected.

7 Hydrocarbons ALS ENVIRONMENTAL ANALYTICAL REPORT TVH (C5-C10) (mg/l) < L CONTD... PAGE 5 of 8 Version: FINAL TEH10-30 (mg/l) <0.25 <0.25 TPH5-30 (mg/l) Surrogate: 2-Bromobenzotrifluoride (%) <5.0 <5.0 Glycols Diethylene Glycol (mg/l) <5.0 <5.0 Ethylene Glycol (mg/l) <5.0 <5.0 1,2-Propylene Glycol (mg/l) * Please refer to the Reference Information section for an explanation of any qualifiers detected.

8 Reference Information L CONTD... PAGE 6 of 8 Version: FINAL QC Samples with Qualifiers & Comments: QC Type Description Parameter Qualifier Applies to Sample Number(s) Duplicate Duplicate Duplicate Duplicate Method Blank Fluoride (F) Nitrite (as N) Nitrite (as N) Nitrate (as N) Copper (Cu)-Dissolved Nitrate (as N) Sulfate (SO4) Barium (Ba)-Dissolved Manganese (Mn)-Dissolved Nickel (Ni)-Dissolved Strontium (Sr)-Dissolved Uranium (U)-Dissolved Total Carbon Silicon (Si)-Dissolved Magnesium (Mg)-Total Silicon (Si)-Total Total Organic Carbon Total Kjeldahl Nitrogen Total Kjeldahl Nitrogen MB-LOR MSTN Qualifiers for Individual Parameters Listed: Qualifier Description MB-LOR MSTN TKNI Detection Limit Adjusted due to sample matrix effects. Method Blank exceeds ALS DQO. Limits of Reporting have been adjusted for samples with positive hits below 5x blank level. recovery could not be accurately calculated due to high analyte background in sample. TKN recovery was low due to interference from high nitrate, which causes negative bias on TKN. TKN result is likely biased low due to Nitrate interference. Nitrate-N is > 10x TKN. Test Method References: ALS Test Code Matrix Test Description Method Reference** ALK-COL-VA Water Alkalinity by Colourimetric (Automated) EPA This analysis is carried out using procedures adapted from EPA Method "Alkalinity". Total Alkalinity is determined using the methyl orange colourimetric method. ANIONS-N+N-CALC-VA Water Nitrite & Nitrate in Water (Calculation) EPA Nitrate and Nitrite (as N) is a calculated parameter. Nitrate and Nitrite (as N) = Nitrite (as N) + Nitrate (as N). CARBONS-TC-VA Water Total 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)". 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 (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. EPH-L-ME-FID-VA Water EPH in Water (Low Level) BC Lab Manual

9 Reference Information L CONTD... PAGE 7 of 8 Version: FINAL 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. F-IC-N-VA Water Fluoride in Water by IC EPA (mod) Inorganic anions are analyzed by Ion Chromatography with conductivity and/or UV detection. GLY-WAT-FID-VA Water Glycols in Water by GCFID SW-846, METHOD 8015B, EPA This analysis is carried out using procedures adapted from "Test Methods for Evaluating Solid Waste" SW-846, Method 8015B, published by the United States Environmental Protection Agency (EPA). The procedure involves treatment of the sample with a strong base (NaOH) and benzoyl chloride to form the corresponding benzoate esters. The benzoate esters are then extracted with iso-octane and the extract is analyzed by capillary column gas chromatography with flame ionization detection (FID). 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-DIS-ICP-VA Water Dissolved Metals in Water by ICPOES EPA SW A/6010B This analysis is carried out using procedures adapted from "Standard Methods for the Examination of Water and Wastewater" published by the American Public Health Association, and with procedures adapted from "Test Methods for Evaluating Solid Waste" SW-846 published by the United States Environmental Protection Agency (EPA). The procedure involves filtration (EPA Method 3005A) and analysis by inductively coupled plasma - optical emission spectrophotometry (EPA Method 6010B). 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. MET-TOT-ICP-VA Water Total Metals in Water by ICPOES EPA SW A/6010B This analysis is carried out using procedures adapted from "Standard Methods for the Examination of Water and Wastewater" published by the American Public Health Association, and with procedures adapted from "Test Methods for Evaluating Solid Waste" SW-846 published by the United States Environmental Protection Agency (EPA). The procedures may involve preliminary sample treatment by acid digestion, using either hotblock or microwave oven (EPA Method 3005A). Instrumental analysis is by inductively coupled plasma - optical emission spectrophotometry (EPA Method 6010B). 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 (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 (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. 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. 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

10 Reference Information L CONTD... PAGE 8 of 8 Version: FINAL It is recommended that this analysis be conducted in the field. 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. 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. SO4-IC-N-VA Water Sulfate in Water by IC EPA (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. 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. 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 EPA8260B, 5021 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 EPA8260B, 5021 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: 69595

11 Reference Information L CONTD... PAGE 9 of 8 Version: FINAL 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.

12 ALS Sample ID: Client Sample ID: L L-1 RW1 The EPH Hydrocarbon Distribution Report (HDR) is intended to assist you in characterizing hydrocarbon products that may be present in your sample. For further interpretation, a current library of reference products is available on or upon request. 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 by as much as 0.5 minutes. Peak heights in this report are a function of the sample concentration, the sample amount extracted, the sample dilution factor, and the response scale at the left. A "-L-" in the sample ID denotes a low level sample. A "-S-" denotes a silica gel cleaned sample.

13 Printed on 5/11/2015 3:23:36 PM Page 1 of 1 ALS Sample ID: Client Sample ID: L L-2 RW2 The EPH Hydrocarbon Distribution Report (HDR) is intended to assist you in characterizing hydrocarbon products that may be present in your sample. For further interpretation, a current library of reference products is available on or upon request. 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 by as much as 0.5 minutes. Peak heights in this report are a function of the sample concentration, the sample amount extracted, the sample dilution factor, and the response scale at the left. A "-L-" in the sample ID denotes a low level sample. A "-S-" denotes a silica gel cleaned sample.

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