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Spargero Analytical Laboratory Division <br /> Mobile Laboratory DivisionTechnologyInc: <br /> Scientific Division <br /> With Automation in Mind <br />' Ill Quality Control <br />' A. Project Specific QC No project specific QC 0 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 n rol 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. M$trix 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 /> Iwith 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 /> Ifactual concentration) j <br /> IV Analysis Results <br /> Results are on the attached data sheets <br /> i <br /> I <br /> 3050 Fite Circle Suite 112 • Sacramento California 95827 (996) 362-8947 • FAX (916) 362-0947 <br />