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ENVIRONMENTAL <br /> Analytical Chemists <br /> June 21,2021 Lab ID : STK2138153 <br /> Lange Twins Customer : 3-9851 <br /> Quality Control- Organic <br /> Constituent Method Date/ID Type Units Cone QC Data DQO Note <br /> Organic <br /> 1,2-Dibromoethane(EDB) 504 06/14/21:206634JMR Blank ug/L ND <0.02 <br /> LCS ug/L 0.2463 104% 70-130 <br /> LCS ug/L 0.2430 96.0% 70-130 <br /> MS ug/L 0.2384 103% 70-130 <br /> (STK2138153-001) MSD ug/L 0.2425 94.3% 70-130 <br /> MSRPD ug/L 0.2433 6.9% :530 <br /> QMDL ug/L 0.01901 116% 60-140 <br /> 1,3-Dibromopropane 504 06/14/21:206634JMR Blank ug/L 0.5864 97.3% 70-130 <br /> LCS ug/L 0.5781 96.1% 70-130 <br /> LCS ug/L 0.5703 89.2% 70-130 <br /> MS ug/L 0.5596 92.2% 70-130 <br /> (STK2138153-001) MSD ug/L 0.5690 83.3% 70-130 <br /> MSRPD ug/L 0.2433 8.5% <30 <br /> MDL ug/L 0.5620 85.6% 70-130 <br /> DBC'P 504 06/14/21:206634JMR Blank ug/L ND <0.01 <br /> LCS ug/L 0.2463 96.2% 70-130 <br /> LCS ug/L 0.2430 92.5% 70-130 <br /> MS ug/L 0.2384 97.7% 70-130 <br /> (STK2138153-001) MSD ug/L 0.2425 86.1% 70-130 <br /> MSRPD ug/L 0.2433 10.7% :530 <br /> QMDL ug/L 0.01901 113% 60-140 <br /> 13DBP 504.1 06/14/21:209048jmr CCV ug/L 9.975 86.7% 70-130 <br /> CCV ug/L 7.481 90.8% 70-130 <br /> DBCP 504.1 06/14/21:209048jmr CCV ug/L 5.000 86.2% 70-130 <br /> CCV ug/L 2.000 93.0% 70-130 <br /> HA3 504.1 06/14/21:209048jmr CCV ug/L 5.000 96.8% 70-130 <br /> CCV u L 1 2.000 76.0% 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 /> D O :Data Quality Objective-This is the criteria against which the quality control data is compared. <br /> Page 4 of 4 <br /> Corporate Vices&Laboratory Offlce&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 />