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_ September 14, 2009 Lab ID : STK0938074 <br /> Neil Anderson & Associates Customer : 3-9574 <br /> Quality Control - Organic <br /> Constituent Method Date/ID, Type Units Cone. QC Data DQO Note <br /> Organic <br /> 1,2-Dibronloethme(BDB) 504 09/10/2009:209562 Blank ug/L ND <0.02 <br /> LCS ug/L 0.2950 89.3% 70-130 <br /> MS ug/L 0.2950 74.8% 70-130 <br /> (STK0938127-002) MSD ug/L 0.2950 74.0% 70-130 <br /> MSRPD u 0.5896 1.1% <_30 <br /> 1,3-Dibromopropme 504 09/10/2009:209562 Blank ug/L 0.5896 83.2% 70-130 <br /> LCS ug/L 0.5896 112% 70-130 <br /> MS ug/L 0.5896 99.4% 70-130 <br /> (STK0939127-002) MSD ug/l, 0.5896 93.9% 70-130 <br /> MSRPD u 0.5896 5.7% <30 <br /> DBCP 504 09/10/2009:209562 Blank ug/L ND <0.01 <br /> LCS ug/L 0.2950 102% 70-130 <br /> MS ug/L 0.2950 43.9% 70-130 435 <br /> (STK0938127-002) MSD ug/L 0.2950 52.6% 70-130 435 <br /> MSRPD u 0.5896 3.5% :S30 <br /> 13DBP 504.1 09/11/2009:211834 CCV ug/L 10.02 76,8% 70-130 <br /> CCV ugfL 10.02 99.8% 70-130 <br /> DBCP 504.1 09/11/2009:211834 CCV ug/L 5.015 88.5% 70430 <br /> CCV ugfL 5.015 96.5% 70-130 <br /> EDB 504.1 09/11/2009:211834 CCV ug/L 5.015 85.3% 70-130 <br /> CCV u 5.015 83.0% 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 mean 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 analyted.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 /> DQO :Data Quality Objective-This is the criteria a ainst which the quality control data is compared. <br /> Explanation <br /> 435 ;Sample matrix may be affecting this analyte.Data was accepted based on the LCS or CCV recovery. <br /> Page 6 of 6 <br />