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EMRONMENTAL AGRICULTURAL <br /> Analytical Chemists <br /> August 2, 2022 Lab No. : ST,2237569 <br /> Anna Gwerder <br /> Customer No. : 3017263 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Nitrate Nitrogen 450ONO3F 06/03/2022:206206LFS Blank mg/L ND <0.2 <br /> LCS mg/L 11.22 96.8% 80-120 <br /> MS mg/L 5.609 95.3% 66-125 <br /> (VI 2243980-001) MSD mg/L 5.609 95.4% 66-125 <br /> MSRPD mg/L 5.609 0.1% <30.4 <br /> Nitrite as Nitrogen 450ONO3F 06/03/2022:206208LFS Blank mg/L ND <0.2 <br /> LCS mg/L 1.218 106% 80-120 <br /> MS mg/L 1.218 51.3% 50-150 <br /> (VI 2243980-001) MSD mg/L 1.218 51.5% 50-150 <br /> MSRPD mg/L 1.218 0.3% s30 <br /> Definition <br /> Blank : Method Blank-Prepared to verify that the preparation process is not contributing contamination to the samples. <br /> DQO : Data Quality Objective-This is the criteria against which the quality control data is compared. <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 matrix <br /> affects analyte recovery. <br /> MSD : Matrix Spike Duplicate of MS/MSD pair-A random sample duplicate is spiked with a known amount of analyted.The recoveries are an <br /> 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 and <br /> analysis. <br /> ND :Non-detect-Result was below the DQO listed for the analyte. <br /> Section:Quality Control Page 4 of 4 Page 4 of 4 <br /> Corporate Offices&Laboratory Office&Laboratory ORics&Laboratory Office&Laboratory Office&Laboratory <br /> 653 Corporation Street 2500 Stagecoach Road 563 E.Undo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue <br /> Santa Paula,CA 93060 Stockton,CA 95215 Chim,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 <br /> TEL:(805)392-2000 TEL:(209)942-0182 TEL:(630)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 <br /> Env FAX:(805)525 Al 721 Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)7348435 <br /> CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certificatlon No.2810 <br />