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rVik <br />ENVIRONMENTAL AGRICULTURAL <br />Anal \ tical <br />September 18, 2019 <br /> Lab ID : STK1953430 <br />Tony Nocetti <br /> Customer :3-18381 <br />Quality Control - Inorganic <br />Constituent Method Date/ID Type Units Conc. QC Data DQO Note <br />Wet Chem <br />Nitrate + Nitrite as N 4500NO3F MS mcgl., 28.04 39.4% 5-285 <br />(VI 1945190-001) MSD mg/L 28.04 40.2% 5-285 <br />MSRPD mg/I. 28.04 1.9% <30.4 <br />4500NO3F 09/11/19:214207JDD CCB mg/L 0.172 0_2 <br />CCV mg/L 11.22 100% 90-110 <br />CCB mg/L 0.171 0.2 <br />CCV mg/L 11.22 100% 90-110 <br />Definition <br />CCV : Continuing Calibration Verification - Analyzed to verify the instrument calibration is within criteria_ <br />CCB : Continuing Calibration Blank - Analyzed to verify the instrument baseline is within criteria. <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 <br />matrix affects analyte recovery. <br />MSD <br />: Matrix Spike Duplicate of MS/MSD pair - A random sample duplicate is spiked with a known amount of analyte. The recoveries <br />are an indication of how that sample matrix affects analyte recovery. <br />MSRPD <br />: MS/MSD Relative Percent Difference (RPD) - The MS relative percent difference is an indication of precision for the preparation <br />and analysis. <br />DQO : Data Qualiy Objective - This is the criteria against which the quality control data is compared. <br />Page 5 of 5 <br />Corporate Offices & Laboratory <br />853 Corporation Street <br />Santa Paula, CA 93060 <br />TEL: (805)392-2000 <br />Env FAX: (805)525-4172 /A9 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 Office & Laboratory <br />563 E. Lindo Avenue 3442 Empress Drive, Suite D <br />Chico, CA 95926 San Luis Obispo, CA 93401 <br />TEL: (530)343-5818 TEL: (805)783-2940 <br />FAX (530)343-3807 FAX: (805)783-2912 <br />CA ELAP Certification No. 2670 CA ELAP Certification No. 2775 <br />Office & Laboratory <br />9415W. Goshen Avenue <br />Visalia, CA 93291 <br />TEL: (559)734-9473 <br />FAX: (559)734-8435 <br />CA ELAP Certification No. 2810