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FUL ENVIRONMENTAL-- AGRICULTURAL Analytical Clietnists June 29, 2021 Lab ID : STK2138806 San Joaquin Co. Environmental Health Dep Customer : 3-17919 Quality Control- Organic Constituent Method Date/iD Type Units Conc. QC Data DQO Note Organic I,3-Dibromopropane ;04 06/24/21:207085JMR Blank ug/L 0.5852 94.1% 70-130 LCS ug/L 0.5868 94.8% 70-130 MS ug/L 0.5617 116% 70-130 (STK2138806-001) MSD ug/L 0.5693 107% 70-130 MSRPD ug/L 0.2434 7.2% 830 QMDL ug/L 0.5739 81.7% 70-130 DBCP 504 06/24/21:207085JMR Blank ug/L ND <0.01 LCS ug/L 0.2500 95.8% 70-130 MS ug/L 0.2393 134% 70-130 435 (STK2138806-001) MSD ug/L 0.2426 111% 70-130 MSRPD ug/L 0.2434 17.6% <30 MDL I ug/L 0.01942 118% 1 60-140 13DBP 504.1 06/24/21:209600jmr CCV ug/I 9.975 99.1% 70-130 CCV u I 7.481 92.1% 70-130 BCP 504.1 06/24/21:209600jmr CCV ug/I 5.000 98.2% 70-130 CCV u I 2.000 99.5% 70-130 Definition CCV :Continuing Calibration Verification-Analyzed to verify the instrument calibration is within criteria. Blank :Method Blank-Prepared to verify that the preparation process is not contributing contamination to the samples. LCS :Laboratory Control Standard/Sample-Prepared to verify that the preparation process is not affecting analyte recovery. MS :Matrix Spikes-A random sample is spiked with a known amount of analyte.The recoveries are an indication of how that sample matrix affects analyte recovery. MSD :Matrix Spike Duplicate of MS/MSD pair-A random sample duplicate is spiked with a known amount of analyte.The recoveries are an indication of how that sample matrix affects analyte recovery. MSRPD :MS/MSD Relative Percent Difference(RPD)-The MS relative percent difference is an indication of precision for the preparation and analysis. ND :Non-detect-Result was below the DQO listed for the analyte. DQO :Data Quality Objective-This is the criteria against which the quality control data is compared. Explanation 435 :Sample matrix may be affecting this analyte.Data was accepted based on the LCS or CCV recovery. Page 5 of 5 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172 1 Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 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