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ArlartmM <br /> .O . , <br /> Analytical Chemists <br /> June 18, 2026 <br /> Lab No. : STK2638296 <br /> Live Oak Geo Environmental <br /> Customer No. : 3016608 <br /> Quality Control - Organic <br /> Organic <br /> 1,3-Dibromopropane 504 06/09/2026:206427MNM Blank ug/L 1.016 97.7% 70-130 <br /> LCS ug/L 0.5124 104% 70-130 <br /> LCS ug/L 0.5123 95.1% 70-130 <br /> MS ug/L 0.5121 103% 70-130 <br /> (SP 2600033-083) MSD ug/L 0.5102 112% 70-130 <br /> MSRPD ug/L 8.1% :530 <br /> QMDL ug/L 0.9744 95.4% 70-130 <br /> DBCP 504 06/09/2026:206427MNM Blank ug/L ND <0.00993 <br /> LCS ug/L 0.2433 122% 70-130 <br /> LCS ug/L 0.2432 106% 70-130 <br /> MS ug/L 0.2431 115% 70-130 <br /> (SP 2600033-083) MSD ug/L 0.2422 129% 70-130 <br /> MSRPD ug/L 11.2% :530 <br /> QMDL ug/L 0.01843 88.6% 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 5 of 6 Page 5 of 6 <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 />