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January 8, 2021 <br />Eclipse Metal Fab <br />Lab ID : STK2055296 <br />Customer :3-18587 <br />Quality Control - Inorganic <br />Constituent <br />Method <br />Date/1D <br />Type <br />Units <br />Cone. <br />QC Data <br />DQO <br />Note <br />Metals <br />Selenium <br />6010B <br />01/04/21:200085AC <br />CCB <br />ppm <br />-0.0007 <br />0.02 <br />CCV <br />ppm <br />1.000 <br />98.5% <br />90-110 <br />CCB <br />PPM <br />0.0008 <br />0.02 <br />Silver <br />6010B <br />01/04/21:200085AC <br />CCV <br />ppm <br />1.000 <br />97.5% <br />90-110 <br />CCB <br />ppm <br />0.0023 <br />0.02 <br />CCV <br />ppm <br />1.000 <br />93.4% <br />90-110 <br />CCB <br />ppm <br />0.0001 <br />1 0.02 <br />Thallium <br />6010B <br />01/04/21:200085AC <br />CCV <br />ppm <br />1.000 <br />102% <br />90-110 <br />CCB <br />ppm <br />-0.0010 <br />0.02 <br />CCV <br />ppm <br />1.000 <br />106% <br />90-110 <br />CCB <br />ppm <br />-0.0007 <br />0.02 <br />Vanadium <br />6010B <br />01/04/21:200085AC <br />CCV <br />ppm <br />1.000 <br />95.0% <br />90-110 <br />CCB <br />ppm <br />-.000004 <br />0.01 <br />CCV <br />ppm <br />1.000 <br />96.8% <br />90-110 <br />CCB <br />ppm <br />1 0.00006 <br />0.01 <br />6010B <br />12/30/20:200049AC <br />CCV <br />ppm <br />1.000 <br />106% <br />90-110 <br />CCB <br />ppm <br />0.0003 <br />0.01 <br />CCV <br />ppm <br />1.000 <br />110% <br />90-110 <br />CCB <br />ppm <br />0.0007 <br />0.01 <br />inc <br />6010B <br />12/30/20:200049AC <br />CCV <br />ppm <br />1.000 <br />95.3% <br />90-110 <br />CCB <br />ppm <br />-0.0009 <br />0.02 <br />CCV <br />ppm <br />1.000 <br />107% <br />90-110 <br />CCB <br />ppm <br />-0.0008 <br />0.02 <br />CCV <br />ppm <br />1.000 <br />100% <br />90-110 <br />CCB <br />PPM <br />1 <br />1 -0.0004 <br />1 0.02 <br />Definition <br />: PDS failed, matrix - Post Digestion Spike (PDS) not within Acceptance Range (AR) because of matrix interferences affecting this <br />PDS <br />analyte. Data was accepted based on the LCS recovery. <br />CCV <br />: Continuing Calibration Verification - Analyzed to verify the instrument calibration is within criteria. <br />CCB <br />: Continuing Calibration Blank - Analyzed to verify the instrument baseline is within criteria. <br />Blank <br />: Method Blank - Prepared to verify that the preparation process is not contributing contamination to the samples. <br />LCS <br />: Laboratory Control Standard/Sample - Prepared to verify that the preparation process is not affecting analyte recovery. <br />Matrix Spikes - A random sample is spiked with a known amount of analyte. The recoveries are an indication of how that sample <br />MS <br />matrix affects analyte recovery. <br />: Matrix Spike Duplicate of MS/MSD pair - A random sample duplicate is spiked with a known amount of analyte. The recoveries <br />MSD <br />are an indication of how that sample matrix affects analyte recovery. <br />: MS/MSD Relative Percent Difference (RPD) - The MS relative percent difference is an indication of precision for the preparation <br />MSRPD <br />and analysis. <br />ND <br />: Non -detect - Result was below the DQO listed for the analyte. <br />DQO <br />: Data Quality Objective - This is the criteria against which the quality control data is compared. <br />Explanation <br />360 <br />: CCV above Acceptance Range (AR). Samples which were non detect for this analyte were accepted. <br />: Post Digestion Spike (PDS) not within Acceptance Range (AR) because of matrix interferences affecting this <br />analyte. Data was <br />430 <br />accepted based on the LCS recovery. <br />435 <br />: Sample matrix may be affecting this analyte. Data was accepted based on the LCS or CCV recovery. <br />Page 9 of 9 <br />