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A. <br /> A AnalyticalTechnologies,lnc <br /> GAS CHROMATOGRAPHY - QUALITY CONTROL <br /> BLANK SPIKE <br /> Page 12 <br /> Test MOD EPA 8015-CDOHS (FUEL HYDROCARBONS/BTXE) ATI I D 503306 <br /> Blank Spike # 55481 Date Extracted N/A <br /> Client ALISTO ENGINEERING Date Analyzed 30-MAR--95 <br /> Project # G096404/10-085-05-001 Sample Matrix WATER <br /> Project Name BP SITE 411194/2375 TRAY BLVD , TRAY CA <br /> ------------------------------------------------------------------------------------------------ <br /> Parameters Units Blank Spiked Spike %- <br /> Result Sample Conc Rec <br /> ------------------------------------------------------------------------------------------------ <br /> BENZENE UG/L <0 50 4 7 5 0 94 <br /> TOLUENE UG/L <0 50 4 8 5 0 96 <br /> t Recovery = (Spike Sample Result - Sample Result) *100/Spike Concentration <br /> RPD (Relative I Difference) _ (Spiked Sample - Blank Result) *100/Average Result <br />