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.O `AGRICULTURAL <br /> Analytical Chemists <br /> June 28, 2024 <br /> Lab No. : STK2439003 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control - Metals <br /> Metals <br /> Boron 200.7 06/20/2024:206893AC MS mg/L 4.000 98.9% 75-125 <br /> (STK2439034-001) MSD mg/L 4.000 101% 75-125 <br /> MSRPD mg/L 1.8% :_20.0 <br /> Calcium 200.7 06/20/2024:206893AC MS mg/L 12.00 99.8% 75-125 <br /> (STK2439034-001) MSD mg/L 12.00 99.4% 75-125 <br /> MSRPD mg/L 0.3% :_20.0 <br /> Copper 200.7 06/20/2024:206893AC MS ug/L 800.0 103% 75-125 <br /> (STK2439034-001) MSD ug/L 800.0 103% 75-125 <br /> MSRPD ug/L 0.2% :520.0 <br /> Iron 200.7 06/20/2024:206893AC MS ug/L 4000 97.6% 75-125 <br /> (STK2439034-001) MSD ug/L 4000 99.0% 75-125 <br /> MSRPD ug/L 1.3% :_20.0 <br /> Magnesium 200.7 06/20/2024:206893AC MS mg/L 12.00 83.8% 75-125 <br /> (STK2439034-001) MSD mg/L 12.00 81.6% 75-125 <br /> MSRPD mg/L 0.3% :520.0 <br /> Manganese 200.7 06/20/2024:206893AC MS ug/L 800.0 104% 75-125 <br /> (STK2439034-001) MSD ug/L 800.0 104% 75-125 <br /> MSRPD ug/L 0.5% :520.0 <br /> Potassium 200.7 06/20/2024:206893AC MS mg/L 12.00 97.2% 75-125 <br /> (STK2439034-001) MSD mg/L 12.00 96.6% 75-125 <br /> MSRPD mg/L 0.6% :520.0 <br /> Sodium 200.7 06/20/2024:206893AC MS mg/L 12.00 102% 75-125 <br /> (STK2439034-001) MSD mg/L 12.00 101% 75-125 <br /> MSRPD mg/L 0.2% :520.0 <br /> Zinc 200.7 06/20/2024:206893AC MS ug/L 800.0 92.8% 75-125 <br /> (STK2439034-001) MSD ug/L 800.0 92.5% 75-125 <br /> MSRPD ug/L 0.4% :_20.0 <br /> Definition <br /> DQO : Data Quality Objective-This is the criteria against which the quality control data is compared. <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 5 of 7 Page 5 of 7 <br /> Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory <br /> 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue <br /> Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 <br /> TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 <br /> Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 <br /> CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 <br />