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July 1, 2022 <br />Lab No. : STK2237542 <br />San Joaquin County EHD <br />Customer No. :3017919 <br />Quality Control - Metals <br />Section: Quality Control <br />Page 5 of 7 <br />Page 5 of 7 <br />Corporate Offices & Laboratory <br />Office & Laboratory <br />Office & Laboratory <br />Office & Laboratory <br />Office & Laboratory <br />853 Corporation Street <br />2500 Stagecoach Road <br />Metals <br />3442 Empresa Drive, Suite D <br />9415 W. Goshen Avenue <br />Santa Paula, CA 93060 <br />Stockton, CA 95215 <br />Chico, CA 95926 <br />San Luis Obispo, CA 93401 <br />Boron <br />200.7 06/03/2022:206186AC <br />MS <br />mg/L <br />4.000 <br />104% <br />75-125 <br />FAX: (530)343-3807 <br />(STK2237377-001) <br />MSD <br />mg/L <br />4.000 <br />96.2% <br />75-125 <br />CA ELAP Certification No. 2810 <br />MSRPD <br />mg/L <br />800.0 <br />6.3% <br />:_20.0 <br />Calcium <br />200.7 06/03/2022:206186AC <br />MS <br />mg/L <br />12.00 <br />125% <br />75-125 <br />(STK2237377-001) <br />MSD <br />mg/L <br />12.00 <br />114% <br />75-125 <br />MSRPD <br />mg/L <br />800.0 <br />1.6% <br />:520.0 <br />Copper <br />200.7 06/03/2022:206186AC <br />MS <br />ug/L <br />800.0 <br />103% <br />75-125 <br />(STK2237377-001) <br />MSD <br />ug/L <br />800.0 <br />94.2% <br />75-125 <br />MSRPD <br />ug/L <br />800.0 <br />8.8% <br />:520.0 <br />Iron <br />200.7 06/03/2022:206186AC <br />MS <br />ug/L <br />4000 <br />103% <br />75-125 <br />(STK2237377-001) <br />MSD <br />ug/L <br />4000 <br />95.2% <br />75-125 <br />MSRPD <br />ug/L <br />800.0 <br />7.8% <br />:520.0 <br />Magnesium 200.7 06/03/2022:206186AC <br />MS <br />mg/L <br />12.00 <br />108% <br />75-125 <br />(STK2237377-001) <br />MSD <br />mg/L <br />12.00 <br />101 % <br />75-125 <br />MSRPD <br />mg/L <br />800.0 <br />2.4% <br />1520.0 <br />Manganese 200.7 06/03/2022:206186AC <br />MS <br />ug/L <br />800.0 <br />99.9% <br />75-125 <br />(STK2237377-001) <br />MSD <br />ug/L <br />800.0 <br />91.6% <br />75-125 <br />MSRPD <br />ug/L <br />800.0 <br />8.6% <br />:520.0 <br />Potassium <br />200.7 06/03/2022:206186AC <br />MS <br />mg/L <br />12.00 <br />102% <br />75-125 <br />(STK2237377-001) <br />MSD <br />mg/L <br />12.00 <br />93.7% <br />75-125 <br />MSRPD <br />mg/L <br />800.0 <br />7.8% <br />:520.0 <br />Sodium <br />200.7 06/03/2022:206186AC <br />MS <br />mg/L <br />12.00 <br />125% <br />75-125 <br />(STK2237377-001) <br />MSD <br />mg/L <br />12.00 <br />117% <br />75-125 <br />MSRPD <br />mg/L <br />800.0 <br />1.0% <br />:520.0 <br />Zinc <br />200.7 06/03/2022:206186AC <br />MS <br />ug/L <br />800.0 <br />120% <br />75-125 <br />(STK2237377-001) <br />MSD <br />ug/L <br />800.0 <br />111 % <br />75-125 <br />MSRPD <br />ug/L <br />800.0 <br />8.5% <br />:520.0 <br />Definition <br />DQO <br />: Data Quality Objective -This is the criteria against which the quality control data is compared. <br />MS <br />: 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 <br />: Matrix Spike Duplicate of MS/MSD pair - A random sample duplicate <br />is spiked with a known amount of analyted. The recoveries are an <br />indication of how that sample matrix affects analyte recovery. <br />MSRPD <br />: MS/MSD Relative Percent Difference (RPD) - The MS relative <br />percent difference is an <br />indication <br />of precision for the <br />preparation and <br />analysis. <br />ND <br />: Non -detect - Result was below the DQO listed for the analyte. <br />Section: Quality Control <br />Page 5 of 7 <br />Page 5 of 7 <br />Corporate Offices & Laboratory <br />Office & Laboratory <br />Office & Laboratory <br />Office & Laboratory <br />Office & Laboratory <br />853 Corporation Street <br />2500 Stagecoach Road <br />563 E. Lindo Avenue <br />3442 Empresa Drive, Suite D <br />9415 W. Goshen Avenue <br />Santa Paula, CA 93060 <br />Stockton, CA 95215 <br />Chico, CA 95926 <br />San Luis Obispo, CA 93401 <br />Visalia, CA 93291 <br />TEL: (805)392-2000 <br />TEL: (209)942-0182 <br />TEL: (530)343-5818 <br />TEL: (805)783-2940 <br />TEL: (559)734-9473 <br />Env FAX: (805)525-4172 / Ag FAX: (805)392-2063 FAX: (209)942-0423 <br />FAX: (530)343-3807 <br />FAX: (805)783-2912 <br />FAX: (559)734-8435 <br />CA ELAP Certification No. 1573 <br />CA ELAP Certification No. 1563 <br />CA ELAP Certification No. 2670 <br />CA ELAP Certification No. 2775 <br />CA ELAP Certification No. 2810 <br />