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September 2, 2021 Lab ID : STK2152310 <br />Live Oak Geo Environmental Customer : 3-16608 <br />Quality Control - Inorganic <br />Constituent <br />Office & Laboratory <br />Method <br />Date/ID <br />Type <br />Units <br />Conc. <br />QC Data <br />DQO <br />Note <br />Wet Chem <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 />Nitrate + Nitrite as N <br />450ONO3F <br />08/31/21:210055VVH <br />Blank <br />mg/L <br />CA ELAP Certification No. 1563 <br />ND <br /><0.2 <br />CA ELAP Certification No. 2810 <br />LCS <br />mg/L <br />11.22 <br />100% <br />80-120 <br />MS <br />mg/L <br />5.609 <br />98.4% <br />5-285 <br />(STK21523 10-00 1) <br />MSD <br />mg/L <br />5.609 <br />99.9% <br />5-285 <br />MSRPD <br />m /L <br />5.609 <br />0.9% <br />s30.4 <br />450ONO3F <br />08/31/21:213559VVH <br />ICB <br />mg/L <br />0.074 <br />0.2 <br />ICV <br />mg/L <br />11.22 <br />101% <br />90-110 <br />CCB <br />mg/L <br />-0.021 <br />0.2 <br />CCV <br />m /L <br />11.22 <br />102% <br />90-110 <br />Nitrate Nitrogen <br />450ONO3F <br />08/31/21:210055VVH <br />Blank <br />-T/L- <br />ND <br /><0.2 <br />Definition <br />ICV <br />: Initial Calibration Verification - Analyzed to verify the instrument calibration is within criteria. <br />ICB <br />: Initial Calibration Blank - Analyzed to verify the instrument baseline is within criteria. <br />CCV <br />: Continuing Calibration Verification - Analyzed to verify the instrument calibration is within criteria. <br />CCB <br />: Continuing Calibration Blank - Analyzed to verify the instrument baseline is within criteria. <br />Blank <br />: Method Blank - Prepared to verify that the preparation process is not contributing contamination to the samples. <br />LES <br />: Laboratory Control Standard/Sample - Prepared to verify that the preparation process is not affecting analyte recovery. <br />: Matrix Spikes - A random sample is spiked with a known amount of analyte. The recoveries are an indication of how that sample <br />MS <br />matrix affects analyte recovery. <br />: Matrix Spike Duplicate of MS/MSD pair - A random sample duplicate is spiked with a known amount of analyte. The recoveries <br />MSD <br />are an indication of how that sample matrix affects analyte recovery. <br />: MS/MSD Relative Percent Difference (RPD) - The MS relative percent difference is an indication of precision for the preparation <br />MSRPD <br />and analysis. <br />ND <br />: Non -detect - Result was below the DQO listed for the analyte. <br />DQO <br />: Data Quality Objective - This is the criteria against which the quality control data is compared. <br />Page 3 of 3 <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 />