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j <br /> May 29, 2047 Lab 1D STK734024 <br /> Chesney Consulting i Custornel- ; 3-15419 <br /> Quality Control - Organic <br /> Constituent Method Date/1D Type Units Conc. QC Data DQO Note <br /> i <br /> 1,3.,5-Trimethyl benzene 524.2 0510812007:A 00-CCV ugA- 10.00 114% 70-130 <br /> Vinyl Chloride 05/08J2007:A209 Blank ugIL ND <0.5 <br /> BS ug/L 10.00 105% 47-124 <br /> BSD ug/.L 10.00 103% 47-124 <br /> BSRPD ug1L 2.4% c 18.6 <br /> 524.2 05108/2007:A00-CCV uglL 10.00 107% 70-130 <br /> Xylenes m,p 05/0812007:A209 Blank ug/L ND X0.5 <br /> BS uglL 20.00 102 , 43-J51 <br /> BSD ug/L 20.00 98.6% 43-151 <br /> i BS"D uglL 3.7%u <_16.1 <br /> 524.2 0510812007:A 00-CCV ug/L 20.00 104% 70-130 <br /> Explanations <br /> 360 CCV above Acceptance Range (AR). Samples;which were non detect for this analyte were accepted. <br /> 560 Surrogate percent recoveries not within the Acceptance Range (AR) due to suspected matrix interferences. <br /> Definitions <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 <br /> recovery. <br /> MSIMSD Matrix Spikes - A random sample is spiked'with a known amount of analyte. The recoveries are an indication o <br /> how that sample matrix affects analyte recovery <br /> BS/BSD Blank Spikes - A blank ;is spiked with a known amount of analyte. It is prepared to verify that the preparation <br /> process is not affecting analyte recovery. <br /> Dup Duplicate Sample - A random sample with eacb batch is prepared and analyzed in duplicate. The relative percent <br /> difference is an indication of precision for the preparation and analysis. <br /> ICB Initial Calibration Blank - Analyzed to verify, the instrument baseline is within criteria. <br /> ICV Initial Calibration Verification - Analyzed to 'Verify the instrument calibration is within criteria. <br /> k CCB Continuing Calibration Blank - Analyzed to verify the instrument baseline is within criteria <br />[ CCV Continuing Calibration Verification - Analyzed to verify the instrument calibration is within criteria. <br /> ND Non-detect - Result was below the DQO listed for the analyte. <br /> DQO Data Quality Objective - This is the .criteria against which the quality control data is compared. <br /> t <br /> i <br /> i <br /> I <br /> !I <br /> r <br /> STK734024: Quality Control Page 14 <br />