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I <br /> Spargero Analytical Laboratory Division <br /> Techwbgq�yinc <br /> Mobile Laboratory o � Division <br /> Division <br /> With Automation in M►nd <br /> 1 <br /> II! 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 Snake. A Laboratory Control Spike (LCS) is a <br /> sample which is spiked with 30 analyzed at <br /> p ppb BTEX, and <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 /> �. <br /> Matrix Spike Results. A Matrix Spike is a sample which is spiked <br /> with 30 ppb 3T-X, and analyzed at approximately 10% of the sampla <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 BT-X 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 /> r <br /> 1V Analysis Results <br /> Results are on the attached data sheets <br /> r 3050 Fite Circle Suite 112 - Sacramento, California 95827 • (996) 362-8947 • FAX(996) 362-0947 <br />