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July 8, 2020 Lab ID : STK2038909 Advanced Design Group Customer : 3-18528 Quality Control - Inorganic Constituent Method Date/11) 1y PC knits Cone. QC Data DQO \o(e Vet Chem Nitrogen,'Total Kjeldahl FPA351.2 07/06/20:210366JDD CCB mg/L -0.105 G 5 CCV m L 5.000 108% 9t)-1 10 CPA351.2 07/08;20:210668JDD CCB mg/L 0.018 0.5 CC'V mg/L 5.000 108% 90-110 CC:B mg/L -0.063 0.5 CCV rn L. 5.000 l o6 o. 90-1 10 Definition IC:B :Initial Calibration Blank-Analyzed to verify the instrument baseline is within criteria. CCV :Continuing Calibration Verification-Analyzed to verity the instrument calibration is within criteria. CCB :Continuing Calibration Blank-Analyzed to verity the instrument baseline is within criteria. Blank :Method Blank-Prepared to verify that the preparation process is not contributing contamination to the samples. LCS Laboratory Control Standard/Sample-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 affects analyte recovery. MSD Matrix Spike Duplicate of MS/MSD pair-A random sample duplicate is spiked with a known amount of analyte.The recoveries are 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 tin indication of precision for the preparation and analysis. MSRPD :MS/MSD Relative Percent Difference(RAD)-Ilie MS relative percent difference is an indication of precision for the preparation and analysis. ND Non-detect-Result was below the DQO listed for the analyte. I)QO Data Quality Objective-This is the criteria aeainst which the quality control data is com •red. l�:xplunation i Cam,le MMrA rn;:V be affectinc this anai�tc.Daw a accep!cd based o',::hc I C<of CCV rccu cr%.