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Spargero <br /> Analytical Laboratory Division <br /> '• <br /> Tbichwbgy <br /> Mobile Laboratory Division <br /> In.. Scientific Division <br /> y Wtth Automohon In Mind <br /> III Quality Control <br /> A. Pro ect S ecifrc QC. No project specific QC (i e , spikes and/or <br /> duplicates) was requested <br /> r 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 S ike 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 limits The Matrix Spike results <br /> associated with your samples are on the attached 8020 Modified Matrix- <br /> Spike BTEX Analysis Report <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 Analysis Results <br /> Results are on the attached data sheets <br /> 3050 Fite Circle Suite 112 • Sacramento Califoma 95827 • (9f6) 362-8947 • FAX(916) 362-0947 <br />