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1 <br /> Spargero Analytical Laboratory Division <br /> Mobile Laboratory Division <br />,* Technolog y inc. Scientific Division <br /> III 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 <br /> approximately 10% of the sample load in order to establish method- <br /> specific control Iimits. The LCS results associated with your samples <br /> are on the attached 8020 Modified LCS BTEX Analysis Report. <br /> q. <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 /> I 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 /> I in the Analytical Results section. <br /> Accuracy is measured by Percent Recovery as in: <br /> % recovery measured concentration x 100 <br /> 0 (actual concentration) <br /> IV Analysis Results <br /> I Results are on the attached data sheets. <br /> i <br /> 30-5 F,te (916) 362-8947 • FAX (9f6) 362-0947 <br />