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Spargero Analytical Laboratory Division <br /> Mobile Laboratory Division <br /> Techr*b-yh, Scientific Division <br /> With Automotron in Mtnd <br /> I <br /> 111 Quality Control <br /> A Project Specific QC Noro specific p lett spec c QC (i e , spikes and/or <br /> duplicates) was requested <br />' B Method Blank Results - <br /> esu is A method blank is a laboratory generated <br /> t 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 <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 Spike 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 c ed data sheets <br /> 3050 Fite Grcle, Suite 792 • Sacramento Cohfomlo 95827 • (996) 362-8947 FAX(996) 362-0947 <br /> 7- <br /> � , <br />