Aboriginal Affairs and Affaires autochtones et 1+ Northern Development Canada Developpement du Nord Canada 16 Yellowknife Airport Yellowknife, NT. X1A 3T2 Dominion Diamond Ekati Corporation File: W2009L2-0001 #1102-4920 52nd Street Yellowknife, NT X1A 3T1 Attention: Claudine Lee - Superintendant - Environment Operations RE: Approval for the pumping of King Pond to Cujo Lake at the point of compliance, Surveillance Network Program Station 1616-43. Ms. Lee, Your request to pump King Pond to Cujo Lake, has been reviewed by the Inspector and lab results indicate that the water quality in King Pond is acceptable for discharge under part G, item 15(a) in water Licence W2009L2-0001. As specified in the Licence discharge is not to occur until five days after the Inspector has given authorization. In future please include the SNP site in the identification of the discharge site for ease of tracking and if you don't mind please include the results for all parameters required in the cover letter. BTEX and BOD were not listed in the cover letter though they were in the attached lab data. Thank you. Yours Truly, Scott Stewart District Manager South Mackenzie District Aboriginal Affairs and Northern Development Canada cc: Ryan Fequet (WLWB) YELLOWKN#534508 - vI YELLOWKN#572963 - vI July 1, 2013 Aboriginal Affairs and Northern Development Canada South Mackenzie District Field Office 140 Bristol Avenue #16 Yellowknife Airport Yellowknife, NT X1A 3T2 Attention: Marty Sanderson Resource Management Officer III Dear Mr. Sanderson: RE: Approval for the pumping of King Pond to Cujo Lake A water sample was collected from King Pond on June 17th 2013 and sent to ALS Laboratories for analysis. The sample results indicate that the regulated parameters are below the effluent water quality requirements set out in part G, item 15(a) in Water Licence W2009L2-0001. King Pond L1319671 (L1319671-1) Max Concentration of June 17, 2013 Any Grab Sample 13:05 hrs Analyte Units Water Total Suspended Solids mg/L <3.0 25.0 Ammonia, Total (as N) mg/L 0.0104 4.0 Aluminum (Al)-Total mg/L 0.0265 2.0 Arsenic (As)-Total mg/L 0.00141 1.0 Copper (Cu)-Total mg/L 0.00135 0.2 Nickel (Ni)-Total mg/L 0.00344 0.30 TPH5-30 mg/L <0.25 5.0 Dominion Diamond Ekati Corporation (DDEC) is requesting authorization to drawdown King Pond and commence pumping to Cujo Lake. We trust that this information meets with your requirements at this time. If you have any questions, please contact the undersigned. Sincerely, Andrew Howton , B,Sc. Environment Advisor - Operations Attached: Laboratory Certificate L1319671 c.c. Mr. Ryan Fequet, WLWB Dominion Diamond Ekati Corporation Date Received: 19-JUN-13 ATTN: David G. Bruce / Richard Ehlert David Report Date: 29-JUN-13 19:39 (MT) # 1102 - 4920 52nd Street Version: FINAL Yellowknife NT X1A 3T1 Client Phone: 867-880-2157 Certificate of Analysis Lab Work Order #: L1319671 Project P.O. #: BHP2001 Job Reference: 69057 C of C Numbers: Legal Site Desc: 6201104485 ____________________________________________ 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 A Campbell Brothers Limited Company L1319671 CONTD.... PAGE 2 of 6 ALS ENVIRONMENTAL ANALYTICAL REPORT 29-JUN-13 19:39 (MT) Version: FINAL Sample ID L1319671-1 Description WATER Sampled Date 17-JUN-13 Sampled Time 13:05 Client ID 1616- 43_APPROVAL Grouping Analyte WATER Physical Tests Conductivity (uS/cm) 204 Hardness (as CaCO3) (mg/L) 78.9 pH (pH) 7.56 Total Suspended Solids (mg/L) <3.0 Turbidity (NTU) 1.20 Anions and Alkalinity, Total (as CaCO3) (mg/L) 21.6 Nutrients Ammonia, Total (as N) (mg/L) 0.0104 Chloride (Cl) (mg/L) 4.26 Nitrate and Nitrite (as N) (mg/L) 0.0126 Nitrate (as N) (mg/L) 0.0112 Nitrite (as N) (mg/L) 0.0014 Orthophosphate-Dissolved (as P) (mg/L) <0.0010 Phosphorus (P)-Total (mg/L) 0.0132 Sulfate (SO4) (mg/L) 68.1 Organic / Total Carbon (mg/L) 11.4 Inorganic Carbon Total Organic Carbon (mg/L) 7.81 Total Metals Aluminum (Al)-Total (mg/L) 0.0265 Antimony (Sb)-Total (mg/L) 0.00010 Arsenic (As)-Total (mg/L) 0.00141 Barium (Ba)-Total (mg/L) 0.0167 Beryllium (Be)-Total (mg/L) <0.00010 Bismuth (Bi)-Total (mg/L) <0.00050 Boron (B)-Total (mg/L) 0.014 Cadmium (Cd)-Total (mg/L) <0.000010 Calcium (Ca)-Total (mg/L) 11.8 Chromium (Cr)-Total (mg/L) <0.00050 Cobalt (Co)-Total (mg/L) 0.00024 Copper (Cu)-Total (mg/L) 0.00135 Iron (Fe)-Total (mg/L) 0.402 Lead (Pb)-Total (mg/L) <0.000050 Lithium (Li)-Total (mg/L) 0.00485 Magnesium (Mg)-Total (mg/L) 12.0 Manganese (Mn)-Total (mg/L) 0.0197 Mercury (Hg)-Total (mg/L) <0.000010 Molybdenum (Mo)-Total (mg/L) 0.00543 Nickel (Ni)-Total (mg/L) 0.00344 * Please refer to the Reference Information section for an explanation of any qualifiers detected. L1319671 CONTD.... PAGE 3 of 6 ALS ENVIRONMENTAL ANALYTICAL REPORT 29-JUN-13 19:39 (MT) Version: FINAL Sample ID L1319671-1 Description WATER Sampled Date 17-JUN-13 Sampled Time 13:05 Client ID 1616- 43_APPROVAL Grouping Analyte WATER Total Metals Potassium (K)-Total (mg/L) 7.0 Selenium (Se)-Total (mg/L) <0.00010 Silicon (Si)-Total (mg/L) 0.110 Silver (Ag)-Total (mg/L) <0.000010 Sodium (Na)-Total (mg/L) 5.1 Strontium (Sr)-Total (mg/L) 0.127 Thallium (Tl)-Total (mg/L) <0.000010 Tin (Sn)-Total (mg/L) <0.00010 Titanium (Ti)-Total (mg/L) <0.010 Uranium (U)-Total (mg/L) 0.000742 Vanadium (V)-Total (mg/L) <0.0010 Zinc (Zn)-Total (mg/L) <0.0030 Dissolved Metals Dissolved Metals Filtration Location LAB Mercury (Hg)-Dissolved (mg/L) <0.000010 Aggregate BOD (mg/L) <2.0 Organics Volatile Organic Benzene (mg/L) <0.00050 Compounds Ethylbenzene (mg/L) <0.00050 Styrene (mg/L) <0.00050 Toluene (mg/L) <0.00050 ortho-Xylene (mg/L) <0.00050 meta- & para-Xylene (mg/L) <0.00050 Xylenes (mg/L) <0.00075 Surrogate: 4-Bromofluorobenzene (SS) (%) 92.8 Surrogate: 1,4-Difluorobenzene (SS) (%) 99.1 Hydrocarbons TVH (C5-C10) (mg/L) <0.10 TEH10-30 (mg/L) 0.19 TPH5-30 (mg/L) <0.25 * Please refer to the Reference Information section for an explanation of any qualifiers detected. L1319671 CONTD.... PAGE 4 of 6 29-JUN-13 19:39 (MT) Reference Information Version: FINAL QC Samples with Qualifiers & Comments: QC Type Description Parameter Qualifier Applies to Sample Number(s) Duplicate Nitrite (as N) DLM L1319671-1 Duplicate Nitrate (as N) DLM L1319671-1 Duplicate Chloride (Cl) DLM L1319671-1 Duplicate Nitrite (as N) DLM L1319671-1 Duplicate Chloride (Cl) DLM L1319671-1 Duplicate Nitrite (as N) DLM L1319671-1 Qualifiers for Individual Parameters Listed: Qualifier Description DLM Detection Limit Adjusted For Sample Matrix Effects Test Method References: ALS Test Code Matrix Test Description Method Reference** ALK-COL-VA Water Alkalinity by Colourimetric (Automated) EPA 310.2 This analysis is carried out using procedures adapted from EPA Method 310.2 "Alkalinity". Total Alkalinity is determined using the methyl orange colourimetric method. ANIONS-CL-IC-VA Water Chloride by Ion Chromatography APHA 4110 B. This analysis is carried out using procedures adapted from APHA Method 4110 B. "Ion Chromatography with Chemical Suppression of Eluent Conductivity" and EPA Method 300.0 "Determination of Inorganic Anions by Ion Chromatography". 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). ANIONS-NO2-IC-VA Water Nitrite in Water by Ion Chromatography EPA 300.0 This analysis is carried out using procedures adapted from EPA Method 300.0 "Determination of Inorganic Anions by Ion Chromatography". Nitrite is detected by UV absorbance. ANIONS-NO3-IC-VA Water Nitrate in Water by Ion Chromatography EPA 300.0 This analysis is carried out using procedures adapted from EPA Method 300.0 "Determination of Inorganic Anions by Ion Chromatography". Nitrate is detected by UV absorbance. ANIONS-SO4-IC-VA Water Sulfate by Ion Chromatography APHA 4110 B. This analysis is carried out using procedures adapted from APHA Method 4110 B. "Ion Chromatography with Chemical Suppression of Eluent Conductivity" and EPA Method 300.0 "Determination of Inorganic Anions by Ion Chromatography". AS-T-CCMS-VA Water Total Arsenic in Water by CRC ICPMS APHA 3030 B&E / EPA SW-846 6020A 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 hotblock, or filtration (APHA 3030B&E). Instrumental analysis is by collision cell inductively coupled plasma - mass spectrometry (modifed from EPA Method 6020A). BOD5-VA Water Biochemical Oxygen Demand- 5 day APHA 5210 B- "BIOCHEMICAL OXYGEN DEMAND" This analysis is carried out using procedures adapted from APHA Method 5210 B - "Biochemical Oxygen Demand (BOD)". All forms of biochemical oxygen demand (BOD) are determined by diluting and incubating a sample for a specified time period, and measuring the oxygen depletion using a dissolved oxygen meter. Dissolved BOD (SOLUBLE) is determined by filtering the sample through a glass fibre filter prior to dilution.