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April 7,2021 Lab ID : STK2134073 <br /> Live Oak Geo Environmental Customer : 3-16608 <br /> Quality Control - Organic <br /> Constituent Method Date/ID Type Units Cone. QC Data 1)Q0 Note <br /> Organic <br /> 1,2-Dibromoethane(EDB) X04 03/31/21:203466JMR Blank ug/L ND <0.02 <br /> LCS ug/L 0.2847 107% 70-130 <br /> LCS ug/L 0.2788 118% 70-130 <br /> MS ug/L 0.2900 115% 70-130 <br /> (STK2134096-001) MSD ug/L 0.2847 116% 70-130 <br /> MSRPD ug/L 0.5681 1.0% <30 <br /> QMDL ug/L 0.01898 262% 60-140 RERUN <br /> 1,3-Dibromopropane 504 03/31/21:203466JMR Blank ug/L 0.5609 110% 70-130 <br /> LCS ug/L 0.5679 112% 70-130 <br /> LCS ug/L 0.5562 114% 70-130 <br /> MS ug/L 0.5786 120% 70-130 <br /> (STK2134096-001) MSD ug/L 0.5681 118% 70-130 <br /> MSRPD ug/L 0.5681 3.5% <30 <br /> QMDL ug/L 0.5610 115% 70-130 RERUN <br /> BCP 504 03/31/21:203466JMR Blank ug/L ND <0.01 <br /> LCS ug/L 0.2847 116% 70-130 <br /> LCS ug/L 0.2788 122% 70-130 <br /> MS ug/L 0.2900 124% 70-130 <br /> (STK2134096-001) MSD ug/L 0.2847 127% 70-130 <br /> MSRPD ug/L 0.5681 03% <30 <br /> MDL ug/L 0.01898 262% 60-140 RI-:RI N <br /> 13DBP 504.1 04/01/21:204726JMR CCV ug/L 7.481 109% 70-130 <br /> CCV u L 9.975 121% 70-130 <br /> BCP 504.1 04/01/21:204726JNM CCV ug/L 2.000 110% 70-130 <br /> CCV u L 5.000 126% 70-130 <br /> DB 504.1 04/01/21:204726JMR CCV ug/L 2.000 97.5% 70-130 <br /> CCV <br /> ug/L 1 5.000 116% 1 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 /> O :Data Quality Objective-This is the criteria against which the quality control data is compared. <br /> Page 6 of 6 <br />