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Sparger Analytical Laboratory Division <br /> r10 Mobile Laboratory Division <br /> TiZ r I �gy Inc, Scientific Division <br /> With Automation in Mind <br /> i <br /> 3 <br /> 0 <br /> CCg <br /> t <br /> III Quality Control <br /> 4 <br /> , <br /> A. Project Specific QC. No project specific QC (i.e., spikes and/or <br /> duplicates) was requested. <br /> { <br /> B. Method Blank Results. A method blank is a laboratory-generated <br /> i <br /> sample which assesses the degree to which laboratory operations and j <br /> procedures cause false-positive analytical results for your sample. <br /> C. Laboratory Control Spike. A Laboratory Control Spike (LCS) is a <br /> sample which is spiked with 30 ppb BTEX, and analyzed at <br /> approximately 10% of the sample load in order to establish method- <br /> specific control limits. The LCS results associated with your samples <br /> are on the attached 8020 Modified LCS BTEX Analysis Report. <br /> D. Matrix Soike Results. A Matrix Spike is a sample which is spiked <br /> with 30 ppb BTEX, and analyzed at approximately 10% of the sample <br /> load in order to establish method-specific control limits. The Matrix <br /> Spike results associated with your samples are on the attached 8020 <br /> Modified Matrix-Spike BTEX Analysis Report. <br /> No target parameters were detected in the method blank associated <br /> with your sample at the reporting limit levels noted on the data sheets <br /> in the Analytical Results section. <br /> Accuracy is measured by Percent Recovery as in: <br /> % recovery = (measured concentration) x 100 <br /> (actual concentration) <br /> IV Analysis Results <br /> Results are on the attached data sheets. <br /> 3050 Fite Circle, Suite 112 • Sacramento, California 95827 • (916) 362-8947 • FAX(916) 362-0947 <br />