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Z <br /> Spargero Analytical Laboratory Division <br /> Technology,.. I Mobile Laboratory Division <br /> Scientific Division <br /> With Automotion in Mind <br /> i <br /> III Quality Control Ij I <br /> i <br /> A. Proiect S ecific QC. No project specific'�QC (i.e., spikes and/or <br /> duplicates) was requested. i <br /> B. Method Blank Results. A method blah k is a laboratory-generated <br /> sample which assesses the degree to Which laboratory operations and <br /> procedures cause false-positive analytical results for your sample. <br /> I w <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 /> E 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 Spike Results. A Matrix Spik, is a't 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'l is <br /> No target parameters were detected in;ithe method blank associated <br /> with your sample at the reporting limit levels} noted on the data sheets <br /> in the Analytical Results section. r <br />' Accuracy is measured by Percent Recovery as in: p <br /> % recovery = (measured concentration) x 100 M <br /> (actual concentration) <br /> k F <br /> F <br /> IV Analysis Results i <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 />