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January 7, 2020 Lab ID : STK1958479 <br />Ahmed Hussein Customer : 3-18429 <br />Quality Control - Organic <br />Constituent <br />Method <br />Date/ID <br />Type <br />Units <br />Cone. <br />QC Data <br />DQO <br />\utc <br />Organic <br />1,2-Dibromoethane(EDB) <br />�n-I <br />12/29/19:214807MCA <br />Blank <br />ug/L <br />ND <br /><0.02 <br />LCS <br />ug/L <br />0.2458 <br />145% <br />70-130 <br />330 <br />LCS <br />ug/L <br />0.2467 <br />168 °/<, <br />70-130 <br />330 <br />MS <br />ug/L <br />0.2567 <br />0.0% <br />70-130 <br />435 <br />(STK1958479-001) <br />MSD <br />ug/L <br />0.2547 <br />0.0% <br />70-130 <br />435 <br />MSRPD <br />ug/L <br />0.5977 <br />0.0 <br />50.02 <br />1,3-Dibromopropane <br />504 <br />12129/19:214807MCA <br />Blank <br />ug/L <br />0.5658 <br />162 °/ <br />70-130 <br />LCS <br />ug/L <br />0.5768 <br />150 °/, <br />70-130 <br />330 <br />LCS <br />ug/L <br />0.5789 <br />158% <br />70-130 <br />330 <br />MS <br />ug/L <br />0.6024 <br />150% <br />70-130 <br />435 <br />(STK1958479-001) <br />MSD <br />ug/L <br />0.5977 <br />150% <br />70-130 <br />435 <br />MSRPD <br />u <br />0.5977 <br />1.0% <br />1 530 <br />BCP <br />504 <br />12/29/19:214807MCA <br />Blank <br />ug/L <br />ND <br /><0.01 <br />LCS <br />ug/L <br />0.2458 <br />164% <br />70-130 <br />330 <br />LCS <br />ug/L <br />0.2467 <br />187% <br />70-130 <br />330 <br />MS <br />ug/L <br />0.2567 <br />170% <br />70-130 <br />435 <br />(STK1958479-001) <br />MSD <br />ug(L <br />0.2547 <br />171 0/o <br />70-130 <br />435 <br />MSRPD <br />u <br />0.5977 <br />0.4% <br /><_30 <br />13DBP <br />504.1 <br />12131/19:220020MCA <br />CCV <br />ug/L <br />9.975 <br />154% <br />70-130 <br />362 <br />CCV <br />ugIL <br />7.481 <br />162% <br />70-130 <br />362 <br />BCP <br />504.1 <br />12/31/19:200079MCA <br />CCV <br />ug/L <br />5.000 <br />143% <br />70-130 <br />360 <br />CCV <br />ug/L <br />2.000 <br />160% <br />70-130 <br />360 <br />EDB <br />504.1 <br />12/31/19:220020MCA <br />CCV <br />ug/L <br />5.000 <br />145% <br />70-130 <br />360 <br />CCV <br />ug/L <br />2.000 <br />154% <br />70-130 <br />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 of how that sample <br />matrix affects analyte recovery. <br />: Matrix Spike Duplicate of MS/MSD pair - A random sample duplicate is spiked with a known amount of analyte. The recoveries <br />MSD <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 />