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AAnOlyticalTechnoiogies,lnc. <br /> GAS CHROMATOGRAPHY - QUALITY CONTROL <br /> BLANK SPIKE <br /> Test MOD EPA 8015-CDOHS (FUEL, HYDROCARBONS/BTXE) ATI I_D. 504254 Page 8 <br /> Blank Spike #: 56247 Date Extracted: N/A <br /> Client ALISTO ENGINEERING Date Analyzed : 02-MAY-95 <br /> Project # G317904/10-136-03-004 Sample Matrix WATER <br /> Project Name BP SITE#11193/W. HAMMER LANE, STOCKTON CA <br /> ----------------------------------------------------- <br /> Parameters Units Blank Spiked Spike % <br /> Result Sample Conc. Rec <br /> ------------------------------------------------------ <br /> -'--- <br /> BENZENE UG/L <0.50 5.4 5.0 -------'108 - <br /> TOLUENE UG/L <0.50 5.4 5.0 108 <br /> sk Recovery = (Spike Sample Result - Sample Result) *100/Spike Concentration <br /> RPD (Relative 'k Difference) _ (Spiked Sample - Blank Result) *100/Average Result <br />