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SparAnalVhcal�r Laboratory Derision <br /> Mobile Laboratory Division <br /> �v <br /> Tbrhno , Inc Scientific DMslon <br /> With Automation in Mind <br /> III Quality Control <br /> A. Proiect Specific QQ. No project specific QC ti 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 ontr I 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 limas. The LCS results associated with your samples <br /> are on the attached 8020 Modified LCS 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 n ntra i n x 100 <br /> (actual concentration) <br /> IV Anallysia Results <br /> Results are on the attached data sheet <br /> s <br /> 3050 Fite Circle Suite 112 - Sacramento California 95827 - (916) 362-8947 - FAX(916) 362-0947 <br />