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Section: Quality ControlSection: Quality Control <br />This Page is to be Stamped <br /> <br />July 1, 2022 <br />San Joaquin County EHD Lab No.: STK2237542 <br />Customer No.: 3017919 <br /> <br />Quality Control - Metals <br />Constituent Method Date/ID Type Units Conc.QC Data DQO Note <br />Metals <br />Boron 200.7 06/03/2022:206186AC MS mg/L 4.000 104 %75-125 <br />(STK2237377-001)MSD mg/L 4.000 96.2 %75-125 <br />MSRPD mg/L 800.0 6.3%≤20.0 <br />Calcium 200.7 06/03/2022:206186AC MS mg/L 12.00 125 %75-125 <br />(STK2237377-001)MSD mg/L 12.00 114 %75-125 <br />MSRPD mg/L 800.0 1.6%≤20.0 <br />Copper 200.7 06/03/2022:206186AC MS ug/L 800.0 103 %75-125 <br />(STK2237377-001)MSD ug/L 800.0 94.2 %75-125 <br />MSRPD ug/L 800.0 8.8%≤20.0 <br />Iron 200.7 06/03/2022:206186AC MS ug/L 4000 103 %75-125 <br />(STK2237377-001)MSD ug/L 4000 95.2 %75-125 <br />MSRPD ug/L 800.0 7.8%≤20.0 <br />Magnesium 200.7 06/03/2022:206186AC MS mg/L 12.00 108 %75-125 <br />(STK2237377-001)MSD mg/L 12.00 101 %75-125 <br />MSRPD mg/L 800.0 2.4%≤20.0 <br />Manganese 200.7 06/03/2022:206186AC MS ug/L 800.0 99.9 %75-125 <br />(STK2237377-001)MSD ug/L 800.0 91.6 %75-125 <br />MSRPD ug/L 800.0 8.6%≤20.0 <br />Potassium 200.7 06/03/2022:206186AC MS mg/L 12.00 102 %75-125 <br />(STK2237377-001)MSD mg/L 12.00 93.7 %75-125 <br />MSRPD mg/L 800.0 7.8%≤20.0 <br />Sodium 200.7 06/03/2022:206186AC MS mg/L 12.00 125 %75-125 <br />(STK2237377-001)MSD mg/L 12.00 117 %75-125 <br />MSRPD mg/L 800.0 1.0%≤20.0 <br />Zinc 200.7 06/03/2022:206186AC MS ug/L 800.0 120 %75-125 <br />(STK2237377-001)MSD ug/L 800.0 111 %75-125 <br />MSRPD ug/L 800.0 8.5%≤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 />Corporate Offices & Laboratory <br />853 Corporation Street <br />Santa Paula, CA 93060 <br />TEL: (805)392-2000 <br />Env FAX: (805)525-4172 / Ag FAX: (805)392-2063 <br />CA ELAP Certification No. 1573 <br />Office & Laboratory <br />2500 Stagecoach Road <br />Stockton, CA 95215 <br />TEL: (209)942-0182 <br />FAX: (209)942-0423 <br />CA ELAP Certification No. 1563 <br />Office & Laboratory <br />563 E. Lindo Avenue <br />Chico, CA 95926 <br />TEL: (530)343-5818 <br />FAX: (530)343-3807 <br />CA ELAP Certification No. 2670 <br />Office & Laboratory <br />9415 W. Goshen Avenue <br />Visalia, CA 93291 <br />TEL: (559)734-9473 <br />FAX: (559)734-8435 <br />CA ELAP Certification No. 2810 <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 />CA ELAP Certification No. 2775 <br />ENVIRONMENTAL AGRICULTURAL <br />Analytical Chemists