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.O "AGRICULTURAL <br /> Analytical Chemists <br /> June 3, 2026 <br /> Lab No. : STK2637342 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control - Organic <br /> Organic <br /> 1,3-Dibromopropane 504 05/28/2026:205967SBL Blank ug/L 0.5088 112% 70-130 <br /> LCS ug/L 0.5203 109% 70-130 <br /> LCS ug/L 0.5102 118% 70-130 <br /> MS ug/L 0.5120 107% 70-130 <br /> (STK2637284-001) MSD ug/L 0.5102 91.6% 70-130 <br /> MSRPD ug/L 15.6% :530 <br /> QMDL ug/L 0.5134 110% 70-130 <br /> DBCP 504 05/28/2026:205967SBL Blank ug/L ND <0.00995 <br /> LCS ug/L 0.2470 116% 70-130 <br /> LCS ug/L 0.2422 124% 70-130 <br /> MS ug/L 0.2431 123% 70-130 <br /> (STK2637284-001) MSD ug/L 0.2422 102% 70-130 <br /> MSRPD ug/L 18.8% :530 <br /> QMDL ug/L 0.01943 76.8% 60-140 <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 Office&Laboratory Office&Laboratory Office&Laboratory <br /> 853 Corporation Street 2500 Stagecoach Road 563 E.Undo Avenue 3442 Empresa Drive,Suite D 9411 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 /> CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 <br />