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Constituent <br />Wet Chem <br />Nitrate Nitrogen <br />Method <br />Quality Control - Wet Chem <br />Date/ID Type Units Conc. <br /> <br />EGL <br />ENVIRONMENTAL AGRICULTURAL <br />Analytical Chemists <br />July 30, 2024 <br />Mike Wutzke <br /> Lab No. : STIC2450798 <br />Customer No. : 3019150 <br />4500NO3F 07/23/2 024:208231ILP Blank mg/L <br />LCS mg/L <br />MS mg/L <br />(VI 2445928-001) MSD mg/L <br />MSRPD mg/L <br />QC Data <br />ND <0.4 <br />11.22 101% 80-120 <br />5.609 94.9% 66-125 <br />5.609 94.8% 66-125 <br /> <br />0.0% 530.4 <br />000 Note <br /> <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 <br />Page 4 014 Page 4 of 4 <br />Corporate Offices & Laboratory <br />853 Corporation Street <br />Santa Paula, CA 93060 <br />TEL: (805)392-200D <br />CA ELAP Certification No. 1573 <br />Office & Laboratory <br />2500 Stagecoach Road <br />Stockton, CA 95:115 <br />TEL: (209)9.42-0182 <br />CA ELAP Certification No. 1563 <br />Office & Laboratory <br />563 E. Undo Avenue <br />Chico, CA 95926 <br />TEL. (530)343-5818 <br />CA ELAP Certification No, 2670 <br />Office & Laboratory <br />3442 Empress Drive, Suite 0 <br />San Luis Obispo, CA 93401 <br />TEL. (805)783-2940 <br />CA ELAP Certification No. 2775 <br />Office & Laboratory <br />9411W. Goshen Avenue <br />Visalia, CA 93291 <br />TEL: (559)73.4-9473 <br />CA ELAP Codification No. 2810