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Spar <br /> gerAnalytical Laboratory ryDv <br /> sion <br />' Mobile Laboratory Division <br /> T6chwk)OYInc. Scientific Division <br /> With Automation in Mind <br /> I <br /> III 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 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 limas The LCS results associated with your samples <br /> are on the attached 8020 Modified LCS BTEX Analysis Report <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 /> Modified Matrix-Spike BTEX Analysis Report <br /> ENo target parameters were detected in the method blank associated <br /> with your sample at the reporting Irma 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 /> IV Analysis Results <br /> Results are on the attached data sheets <br /> 3050 Fite Circle Suite 112 • Sacramento, California 95827 • (996) 362-8947 • FAX(996) 362-0947 <br />