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January 7, 2020 Lab ID : STK1958479 <br /> Ahmed Hussein Customer : 3-18429 <br /> Quality Control-Organic <br /> Constituent Method Date/ID Type Units Cone. QC Data DQO Note <br /> Organic <br /> 1,2-Dibromoethane(EDB) 504 12/29/19:214807MCA Blank ug/L ND <0.02 <br /> LCS ug/L 0.2458 145% 70-130 330 <br /> LCS ug/L 0.2467 168% 70-130 330 <br /> MS ug/L 0.2567 0.0% 70-130 435 <br /> (STK1958479-001) MSD ug/L 0.2547 0.0% 70-130 435 <br /> MSRPD ug/L 0.5977 0.0 <_0.02 <br /> 1,3-Dibromopropane 504 12/29/19:214807MCA Blank ug/L 0.5658 162% 70-130 <br /> LCS ug/L 0.5768 150% 70-130 330 <br /> LCS ug/L 0.5789 158% 70-130 330 <br /> MS ug/L 0.6024 150% 70-130 435 <br /> (STK1958479-001) MSD ug/L 0.5977 150% 70-130 435 <br /> MSRPD ug/L 0.5977 1.0% 1 <30 <br /> BCP 504 12/29/19:214807MCA Blank ug/L ND <0.01 <br /> LCS ug/L 0.2458 164% 70-130 330 <br /> LCS ug/L 0.2467 187% 70-130 330 <br /> MS ug/L 0.2567 170% 70-130 435 <br /> (STK1958479-001) MSD ug/L 0.2547 171% 70-130 435 <br /> MSRPD ug/L 0.5977 0.4% <_30 <br /> 13DBP 504.1 12/31/19:220020MCA CCV ug(L 9.975 154% 70-130 362 <br /> CCV ugIL 7.481 162% 70-130 362 <br /> BCP 504.1 12/31/19:200079MCA CCV ug/L 5.000 143% 70-130 360 <br /> CCV ug/L 2.000 160% 70-130 360 <br /> DB 504.1 12/31/19:220020MCA CCV ug/L 5.000 145% 70-130 360 <br /> CCV ug/L 1 2.000 154% 70-130 360 <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 ofhow 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 /> Explanation <br /> 330 :The LCS was out of acceptance limits.Results may be biased high. <br /> 360 :CCV above Acceptance Range(AR).Samples which were non detect for this analyte were accepted. <br /> 362 :Surrogates are qualified on Control Chart Limits,these are CCV limits.See individual sample reports. <br /> 435 :Sample matrix may be affecting this analyte.Data was accepted based on the LCS or CCV recovery. <br /> Page 7 of 7 <br />