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_ <br />FGL <br />ENVIRONMENTAL - AGRICUIXURAL <br />Analytical Chemists <br />• <br />March 28, 2024 <br />Julie Edsell <br />Lab No. <br />Customer <br />Quality Control - Wet Chem <br />No. <br />Units <br />mg/L <br />mg/L <br />mgTh <br />mg/L <br />mg/L <br />mg/L <br />mg/L <br />mg/L <br />mg/L <br />mg/L <br />: STK2433288 <br />: 3018723 <br />Conc. <br />11.22 <br />5.609 <br />5.609 <br />1.218 <br />0.6090 <br />0.6090 <br />DQO Note <br /><0.4 <br />60-120 <br />66-125 <br />66-125 <br />530.4 <br /><0.2 <br />80-120 <br />50-150 <br />50-150 <br />530 <br />QC Data <br />Constituent Method Date/1D Type <br />ND <br />96.0% <br />91.9% <br />94.8% <br />3.1% <br />ND <br />102% <br />97.0% <br />99.5% <br />2.5% <br />Wet Chem <br />Nitrate Nitrogen <br />Nit-rite as Nitrogen <br />4500NO3F <br />4500NO3F <br />03/08/2024:2026751LP <br />(VI 2441761-001) <br />03/08/2024:2027191LP <br />(VI 2441761-001) <br />Blank <br />LCS <br />MS <br />MSD <br />MSRPD <br />Blank <br />LCS <br />MS <br />MSD <br />MSRPD <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 />*on: Quality Control <br />rporate Offices & Laboratory <br />poration Street <br />Paula, CA 93060 <br />(805)392-2000 <br />AX (806)525-4172 tAp FAX. <br />Certification No, 1571 <br />Office & Laboratory <br />2500 Stagecoach Road <br />Stockton, CA 95215 <br />TEL: (209)942-0182 <br />(805)392-2063 FAX: (209)942-0423 <br />: CA RAP Certification No. 15 <br />Office & Laboratory <br />563E. Lingo Avenue <br />Chico, CA 95926 <br />TEL (530)343-5818 <br />FAX (530)343-3807 <br />63 CA ELAP Certification No <br />Office & Laboratory <br />3442 Empresa Drive, Suite D <br />San Luis Obispo, CA 93401 <br />TEL: (805)783-2940 <br />FAX: (805)783-2912 <br />2870 CA ELAP Certification No 2775 <br />Page 4 of 4 <br />Office & Laboratory <br />9415W. Goshen Avenue <br />Visalia, CA 93291 <br />TEL (559)734-9473 <br />FAX: (559)734-8435 <br />CA ELAP Certificabon No 2 <br />Page 4 o14