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ENVIRONMENTAL • . <br /> Analytical Chemists <br /> June 18, 2021 Lab ID : STK2138242 <br /> San Joaquin Co. Environmental Health Dep Customer : 3-17919 <br /> Quality Control- Organic <br /> Constituent Method Date/ID Type Units Cone. QC Data UQO Note <br /> Organic <br /> 1,3-Dibromopropane 504 06/11/21:206563JMR Blank ug/L 0.5707 89.6% 70-130 <br /> LCS ug/L 0.5753 102% 70-130 <br /> LCS ug/L 0.5705 99.7% 70-130 <br /> MS ug/L 0.5723 95.8% 70-130 <br /> (STK2138245-001) MSD u9/1- 0.5684 74.2% 70-130 <br /> MSRPD ug/L 0.5684 26.0% 530 <br /> DIRT 504 06/11/21:206563JMR Blank ug/L ND <0.01 <br /> LCS ug/L 0.2451 104% 70-130 <br /> LCS ug/L 0.2431 102% 70-130 <br /> MS ug/L 0.2438 96.8% 70-130 <br /> (STK2138245-001) MSD ug/L 0.2422 70.1% 70-130 <br /> MSRPD u 0.5684 32.7% 1 <30 435 <br /> 13DBP 504.1 06/12/21:208861JMR CCV ug/L 9.975 94.0% 70-130 <br /> CCV1 u 7.481 90.9% 70-130 <br /> BCP 504.1 06/12/21:208861JMR CCV ug/L 5.000 90.0% 1 70-130 <br /> CCV ug/L 1 2.000 79.0% 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 LCS or CCV recovery. <br /> Page 5 of 5 <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 />