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ENVIRONMENTALqUAGRICULTUM <br /> Analytical Chemists <br /> May 18, 2021 Lab ID : STK2136228 <br /> San Joaquin Co. Environmental Health Dep Customer : 3-17919 <br /> Quality Control - Organic <br /> Constituent Method Date11D Type Units Conc. QC Data DQO Note <br /> Organic <br /> 1,3-Dibromopropane 504 05/12/21:205250JMR Blank ug/L 0.5766 99.9% 70-130 <br /> LCS ug/L 0.5774 101% 70-130 <br /> LCS ug/L 0.5716 101% 70-130 <br /> MS ug/L 0.5587 98.2% 70-130 <br /> (STK2136288-001) MSD ug/L 0.5689 103% 70-130 <br /> MSRPD ug/L 0.5689 6.7% <_30 <br /> QMDL I u 0.5771 109% 1 70-130 <br /> DBCP 504 05/12/21:205250JMR Blank ug/L, ND <0.01 <br /> LCS ug/L 0.2460 102% 70-130 <br /> LCs ug/L 0.2436 102% 70-130 <br /> MS ug/L 0.2380 101% 70-130 <br /> (STK2136288-001) MSD ug/L 0.2424 107% 70-130 <br /> MSRPD ug/L 0.5689 6.8% :530 <br /> QMDL I u 0.01953 117% 1 60-140 <br /> 13DBP 504.1 05/13/21:207048JMR CCV ug/L 7.481 105% 70-130 <br /> CCV ug/L 9.975 110% 70-130 <br /> DBCP 504.1 05/13/21:207048JMR CCV ug/L 2.000 95.0% 70-130 <br /> CCV u 5.000 95.8% 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 /> Page 4of4 <br /> Corporate Offices&laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory <br /> 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo 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 />