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ENVIRONMENTAL <br /> <br />AGRICULTURAL <br />Analytical Chemists <br />March 29, 2022 <br />Lab ID : STK2233190 <br />Mike Wutzke Customer : 3-19150 <br />Quality Control - Inorganic <br />Constituent Method Date/ID "Us pc Units (our. QC Data DQO Note <br />Wet Chem <br />Nitrate + Nitrite as N 4500NO3F 03/09/22:202665vvh Blank mg/L ND <0.2 <br />LCS mg/L 11.22 101% 80-120 <br />MS mg/L 5.609 102% 5-285 <br />(SP 2203637-001) MSD mg/L 5.609 104% 5-285 <br />MSRPD mg/L 5.609 2.1% <30.4 <br />4500NO3f 03/09/22:203480vvh CCB mg/1 0.0580 0.2 <br />CCV mg/1 11.22 99.4% 90-110 <br />CCB mg/1 0.0590 0.2 <br />CCV mg/1 11.22 99.2% 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 />Blank : Method Blank - Prepared to verify that the preparation process is not contributing contamination to the samples. <br />LCS : Laboratory Control Standard/Sample - Prepared to verify that the preparation process is not affecting analyte recovery. <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 />ND : Non-detect - Result was below the DQO listed for the analyte. <br />DQO : Data Quality 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 / 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. 1 <br />Office & Laboratory <br />563 E. Lindo Avenue <br />Chico, CA 95926 <br />TEL: (530)343-5818 <br />FAX: (530)343-3807 <br />563 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 & 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