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ENVIRONMENTAL AGRICULTURAL <br />Analytical Chemists <br />November 7, 2024 <br />The Salted Cafe Lab No. : STK2455962 <br />Customer No. : 3019535 <br />Quality Control - Wet Chem <br />Constituent Method Date/ID Type Units Conc. QC Data DQO Note <br />Wet Chem <br />Nitrate Nitrogen 4500NO3F 10/25/2024:2120881LP Blank mg/L ND <0.4 <br />LCS mg/L 11.22 102% 80-120 <br />MS mg/L 5.609 98.9% 66-125 <br />(SP 2417572-001) MSD mg/L 5.609 98.7% 66-125 <br />MSRPD mg/L 0.1% 530.4 <br />Nitrite as Nitrogen 4500NO3F 10/25/2024:212124ILP Blank mg/L ND <0.2 <br />LCS mg/L 1.218 102% 80-120 <br />MS mg/L 0.6090 83.7% 50-150 <br />(SP 2417572-001) MSD mg/L 0.6090 83.9% 50-150 <br />MSRPD mg/L 0.2% 530 <br />Definition <br />Blank : Method Blank - Prepared to verify that the preparation process is not contributing contamination to the samples. <br />DQO : Data Quality Objective - This is the criteria against which the quality control data is compared. <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 matrix <br />affects analyte recovery. <br />MSD : Matrix Spike Duplicate of MS/MSD pair - A random sample duplicate is spiked with a known amount of analyted. The recoveries are an <br />indication of how that sample matrix affects analyte recovery. <br />MSRPD : MS/MSD Relative Percent Difference (RPD) - The MS relative percent difference is an indication of precision for the preparation and <br />analysis. <br />ND : Non-detect - Result was below the DQO listed for the analyte. <br />Section: Quality Control Page 3 of 3 Page 3 of 3 <br />Corporate Offices & Laboratory <br />853 Corporation Street <br />Santa Paula, CA 93060 <br />TEL: (805)392-2000 <br />CA ELAP Certification No. 1573 <br />Office & Laboratory <br />2500 Stagecoach Road <br />Stockton, CA 95215 <br />TEL: (209)942-0182 <br />CA ELAP Certification No. 1563 <br />Office & Laboratory <br />563 E. Lindo Avenue <br />Chico, CA 95926 <br />TEL: (530)343-5818 <br />CA ELAP Certification No. 2670 <br />Office & Laboratory <br />3442 Empresa Drive, Suite D <br />San Luis Obispo, CA 93401 <br />TEL: (805)783-2940 <br />CA ELAP Certification No. 2775 <br />Office & Laboratory <br />9411 W. Goshen Avenue <br />Visalia, CA 93291 <br />TEL: (559)734-9473 <br />CA ELAP Certification No. 2810