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Spar <br /> gerAnalytical Laboratory Division <br /> 1 Mobile Laboratory Division <br /> Tdichr*bOyinc. Scientific Division <br /> With Automation in Mind <br /> tIII Quality Control <br /> A Project Specific QC No project specific QC (i e , spikes and/or <br />' duplicates) was requested <br />' B Method Blank Results A method blank 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 />' C Laboratory Control Spike A Laboratory Control Spike (LCS) is a <br /> sample which is spiked with 30 ppb BTEX, and analyzed at approximately <br />' 10% of the sample load in order to establish method-specific control <br /> limits The LCS results associated with your samples are on the attached <br /> 8020 Modified LCS BTEX Analysis Report <br /> D Matrix Spike Results A Matrix Spike is a sample which is spiked with <br /> 30 ppb BTEX, and analyzed at approximately 10% of the sample load in <br />' order to establish method-specific control limas The Matrix Spike results <br /> associated with your samples are on the attached 8020 Modified Matrix- <br /> Spike BTEX Analysis Report <br />' <br /> No target parameters were detected in the method blank associated with <br />' your sample at the reporting limit levels noted on the data sheets in the <br /> Analytical Results section <br />' Accuracy is measured by Percent Recovery as in <br /> % recovery = (measured concentration) x 100 <br />' (actual concentration) <br />' IV Analysts Results <br /> I <br /> Results are on the attached data sheets <br /> 3050 Fite Circle, - -Suite 772 Sacramento Calrfornra 95827 (996) 362 8947 FAX(916) 362 0947 <br />