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July 8, 2019 Lab ID : STK1938129 <br />Morada Produce Customer : 3-14876 <br />Quality Control - Inorganic <br />Constituent Method Date/1D Type Units Conc. QC Data DQO Note <br />Wet Chem <br />Nitrate + Nitrite as N 4500NO3F 06/11/19:208653JDD CCB mg/L 0.131 0.2 <br />CCV mg/L 11.27 98.5 % 90-110 <br />Nitrite as Nitrogen 4500NO3F 06/11/19:2086521DD CCB mg/L 0.01100 0.012 <br />CCV mg/L 1.218 98.8% 90-110 <br />CCB mg/L 0.00800 0.012 <br />CCV mg/L 1.2 1 8 96.6% 90-110 <br />Definition <br />CCV : Continuing Calibration Verifies ion - Analyzed to verify the instrument calibration is within criteria. <br />CCB : Continuing Calibration Blank - Analyzed to verify the instrument baseline is within criteria. <br />Blank : Method Blank - Prepared to verify that the preparation process is not contributing contamination to the samples. <br />LCS : Laboratory Control Standard/Sample - Prepared to verify that the preparation process is not affecting analyte recovery. <br />MS : Matrix Spikes - A random sample is spiked with a known amount of analyte. The recoveries are an indication of how that sample <br />matrix affects analyte recovery. <br />: MSD Matrix Spike Duplicate of MS/MSD pair - A random sample duplicate is spiked with a known amount of analyte. The recoveries <br />are an indication of how that sample matrix affects analyte recovery. <br />: MSRPD <br /> <br /> MS/MSD Relative Percent Difference (RPD) - The MS relative percent difference is an indication of precision for the preparation <br />and analysis. <br />ND : Non-detect - Result was below the DQO listed for the analyte. <br /><1/4 : High Sample Background - Spike concentration was less than one forth of the sample concentration. <br />DQO : Data Quality Objective - This is the criteria against which the quality control data is compared. <br />Explanation <br />435 . Sample matrix may be affectinL2 this zutalvte Data was accepted based on the LC'S or CCV recovery. <br />Page 10 of 10