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ENVIRONMENTALM—�AGRICULTURAL <br /> Analytical Chemists <br /> June 24, 2021 Lab ID : STK2137853 <br /> Anna Gwerder Customer : 3-17263 <br /> Quality Control-Inorganic <br /> Constituent Method Date/1D Type Units Cone. QC Data DQO Note <br /> Wet Chem <br /> urate+Nitrite as 450ONO3F 06/08121:20635.1VVH Blank mg/L ND <0.2 <br /> LCS mg/L 11.22 101% 80-120 <br /> MS mg/L 5.609 89.1% 5-285 <br /> (VI 2144230-012) MSD mg(L 5.609 95.5% 5-285 <br /> MSRPD mgfL 5.609 1.7% 90.4 <br /> 450ONO3F 06/08/21:208652VVH CCB mg/L 0.108 01 <br /> CCV mg/L 11.22 99.5% 90-110 <br /> CCB mg/L 0.096 0.2 <br /> CCV m 11.22 99.1 % 90-110 <br /> Nitrate Nitrogen 1VVH Blank 450ONO3F 06/0021:20635 m L ND 1 10.2 <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 arc 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 dam is compared. <br /> Page 5 of 5 <br /> Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory <br /> 853 Corporation Street 2500 Stagecoach Road 563 E.Linda Avenue 3442 Empresa Dove.Suite D 9415 W.Goshen Avenue <br /> Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo.CA 93401 Visalia,CA 93291 <br /> TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 <br /> Env FAX.(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 <br /> CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP CertDcation No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 <br />