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3 <br /> ENVIRONMENTJ <br /> Analytical Chemists <br /> February 18,2020 Lab ID : STK2031881 <br /> Live Oak Geo Environmental Customer : 3-16608 <br /> Quality Control - Organic <br /> Constituent Method Date/H) 'I'ylx: Units Cone. QC Data DQ0 Note <br /> Organic <br /> 1,3-Dibromopropane 504 02/12/20:201645MCA Blank ug/L 0.5634 111% 70-130 <br /> LCS ug/L 0.5647 102% 70-130 <br /> LCS ug/L 0.5445 87.2% 70-130 <br /> MS u,-/L 0.5552 140% 70-130 435 <br /> (STK2031629-001) MSD ug/L 0.5570 162% 70-130 435 <br /> MSRPD ug/L 0.5570 15.1% 830 <br /> QMDL I u /L 0.5591 135% 70-130 HR <br /> BCP 504 02/12/20:201645MCA Blank ug/L ND <0.01 <br /> LCS ug/L 0.2406 108% 70-130 <br /> LCS ug/L 0.2320 117% 70-130 <br /> MS ug/L 0.2366 160% 70-130 435 <br /> (STK2031629-001) MSD ug/L 0.2373 181% 70-130 435 <br /> MSRPD u L 0.5570 12.4% 1 S30 <br /> 13DBP 504.1 02/13/20:202262MCA CCV ug/L 9.975 109% 70-130 <br /> CCV I u /L 9.975 88.5% 70-130 <br /> BCP 504.1 02/13/20:202262MCA I CCV ug/L 5.000 74.6% 70-130 <br /> CCV u /L 5.000 95.2% 70-130 <br /> Definition <br /> CCV :Continuing Calibration Verification-Analyzed to verify the instrument calibration 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 /> Explanation <br /> 435 :Sample matrix may be affecting this analyte.Data was accepted based on the LES or CCV recovery. <br /> 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 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 Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 <br />