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Spargero Analytical Laboratory Division <br /> Mobile Laboratory Dimsilon <br /> Technob9"Winc Scientific Division <br /> A ith Al 1rnrnjr1c)r- y , <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 approximately <br /> 10% of the sample load in order to establish method-specific control <br /> limits The LCS results associated with your samples are on the attached <br /> 8020 Modified LCS BTEX Analysis Report <br /> D Matrix Spike Results A Matrix Spike is a sample which is spiked with <br /> 30 ppb BTEX, and analyzed at approximately 10% of the sample load in <br /> order to establish method-specific control limits The Matrix Spike results <br /> associated with your samples are on the attached 8020 Modified Matrix- <br /> Spike BTEX Analysis Report <br /> I <br /> No target parameters were detected in the method blank associated with <br /> your sample at the reporting limit levels noted on the data sheets in the <br /> Analytical Results section <br /> Accuracy is measured by Percent Recovery as in <br /> % recovery = (measured concentration) x 100 <br /> (actual concentration) <br /> 1V Analysis Results <br /> Results are on the attached data sheets <br /> i <br /> 3050 Fite C1rcle 112 - S(,,c rr-jrr_nto 95827 - (996) 362-8947 « FAX (996) 362-0947 <br />