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08-11-'15 15:38 FROM -SKS ENTERPRISES INC August 3, 2015 SKS Enterprises 209-7593154 E Lab ID Customer Quality Control - Inorganic P007/016 .8 : STK1537507 :3-13071 Constituent Method IDateAD Type Units Conic. QC Data DQO (Vote Metals Copper 3050 07/21/15:208370amb LCS mg/kg 40.00 103% 85-115 MS mg/kg 40.00 109% 75-125 (CC 1582193-001) MSD mg/kg 40.00 88.3% 75-125 MSRPD mg/kg 40.00 6.6`Po <20 PDS -gtkg -kg 40.00 97.1% 75-125 Lead 3050 07/21/15:208370amb Blank mg/kg ND <0.5 LCs mg/kg 40.00 100% 85-115 MS mg/kg 40.00 88.0% 75-125 (CC 1582193-001) MSD mg/kg 40.00 90.1% 75-125 MSRPD mg/kg 40.00 2.2% .'20 PDS I m 40.00 90.5 % 75-125 Nickel 3050 07/21/15208370amb Blank mg/kg ND <0.5 LCs mg/kg 40.00 103% 85-115 MS mg/kg 40.00 101% 75-125 (CC 1582193-001) MSD mg/kg 40.00 100% 75-125 MSRPD mg/kg 40.00 0.6% :520 PDS I m 40.00 99.2% 1 75-125 Selenium 3050 07/21/15:208370amb Blank ms//kg ND <0.5 LCS mg/kg 40.00 99.6% 85-115 MS mg/kg 40.00 104% 75-125 (CC 1582193-001) MSD mg/kg 40.00 103% 75-125 MSRPD mg/kg 40.00 1.1% :520 PDS m 40.00 96,8% 75-125 inc 3050 07/21/15:208370amb Blank mg/kg ND <1 LCS mg/kg 40.00 98.9% 85-115 MS mg/kg 40.00 208% 75-125 435 (CC 1582193-001) MSD mg/kg 40.00 164% 75125 435 MSRPD mg/kg 40.00 7.7% X20 PDS I ma/kgma/kg 40.00 158% 1 75-125 430 Mercury 7471 07/13/15:208126ac Blank mg/kg ND <0.03 LCS mg/kg 0.2500 94.8% 85-115 MS mg/kg 0.2500 89.2% 75-125 (CC 1582193-001) MSD mg/kg 0.2500 89.2% 75-125 MSRPD nt 0.2500 0.0% <20 Wet Chem %Solids 25400 07/15/15:208174jing Blank % ND <0.1 (STKI537507-001) Du % 0.5% 23.9 Definition PDS : PDS failed, matrix - Post Digestion Spike (PDS) not within Acceptance Range (AR) because of matrix interferences affecting this analyte. Data was accepted based on the LCS recovery. CCV ; Continuing Calibration Verification - Analyzed to verify the instrument calibration is within criteria. CCB : Continuing Calibration Blank - Analyzed to verify the instrument baseline is within criteria, Blank : Method Blank - Prepared to verify that the preparation process is not contributing contamination to the samples. I -CS : Laboratory Control Standard/Samplo - Prepared to verify that the preparation process is not affecting analyte recovery. MS Matrix Spikes - A random sample is spiked with a known amount of analyte. The recoveries are an indication of how that sample matrix affi cle. analyte recovery. MSD : Matrix Spike Duplicate of MS/MSD pair - A random sample duplicate is spiked with a known amount of analytcd. The recoveries arc an indication of how that sample matrix affects analyte recovery. Dup : Duplicate Sample - A random sample with each batch is prepared and analyzed in duplicate. The relative percent difference is an indication of precision for the preparation and analysis. MSRPD : MS/MSD Relative Percent Difference (RPD) - The MS relative percent difference is an indication of precision for the preparation and analysis. ND : Nan -decoct - Result was below the DQO listed for the analyte. DQO : Data_QualitX Objective - This is the criteria against which the quality control data is coni d. Page 6of7 Received Time Aug.11. 2015 3:46PM No,1340