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EXCELCHEM <br /> BTEX Lab Control Spike, Lab Control Spike Dup Report <br /> • DATE ANALYZED 12/14/2005 <br /> BATCH AOL0043 <br /> BLANK FILENAME 13DECO26 <br /> BS FILENAME 12DECO24 <br /> BSD FILENAME 12DECO25 <br /> MATRIX AIR <br /> FINAL VOLUME (mi) 200 <br /> Amount BLANK BS BSD BS BSD <br /> Analyte S iked (nqL Amount b Rec (ppb) Rec f % Rec % Rec RPD <br /> BENZENE 250 0 106 110 85% 88% 4% <br /> TOLUENE 250 0 106 110 85% 88% 4% <br /> ETHYLBENZENE 250 0 109 113 87% 90% 4% <br /> P,M-XYLENE 500 0 221 226 88% 91% 2% <br /> O-XYLENE 250 0 110 113 88% 90% 3% <br /> BTEX QA/QC <br /> LCS LCSD <br />