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ENVIRONMENTAL — AGRICULTURAL <br />Analytical Chemists <br />April 11,2019 Lab ID : STK1934375 <br />Live Oak Geo Environmental <br /> Customer : 3-16608 <br />Quality Control - Inorganic <br />Constituent Method Date/11) .1.3 Ix' Units Conc. QC Data DQO Note <br />Wet Chem <br />Nitrate + Nitrite as N 4500N031- MS mg/L 28.18 37.6 % 5-285 <br />(STK1934224-001) MSD mg/L 28.18 383 % 5-285 <br />MSRPD mg/L 28.18 13% <30.4 <br />4500NO3F 04/02/19:204718JDD CCB mg/L 0.071 0.2 <br />CCV mg/L 11.27 943% 90-110 <br />CCB mg/L 0.052 0.2 <br />CCV mg/L 1127 94.1 % 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 : 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 : 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 : 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 Quality Objective - This is the criteria against which the quality control data is compared. <br />Page 3 of 3 <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: <br />CA ELAP Certification No. 1573 <br />Office & Laboratory Office & Laboratory <br />2500 Stagecoach Road 563 E. Lindo Avenue <br />Stockton, CA 95215 Chico, CA 95926 <br />TEL: (209)942-0182 TEL: (530)343-5818 <br />(805)392-2063 FAX: (209)942-0423 FAX: (530)343-3807 <br />CA ELAP Certification No. 1563 CA ELAP Certification No. 2670 <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 />Office 8. 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