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AnaiyticalTechnoiogies,inc. <br /> GAS CHROMATOGRAPHY - QUALITY CONTROL <br /> BLANK SPIKE <br /> Page 12 <br /> Test MOD EPA 8015--CDOHS (FUEL HYDROCARBONS/BTXE) ATI I .D. 502225 <br /> Blank Spike #: 54706 Date Extracted: N/A <br /> Client ; ALISTO ENGINEERING Date Analyzed 25--FEB-95 <br /> Project # 6317901/10-037-03/003 Sample Matrix WATER <br /> Project Name : BP SITE #11192/STOCKTON, CA. <br /> ------------------------------------------------------------------------------------------------ <br /> Parameters Units Blank Spiked Spike % <br /> Result Sample Cons. Rec <br /> -----------------._...-------------------__-........_---------------------------------- <br /> BENZENE UG/L <0.50 4.8 5 .0 96 <br /> TOLUENE UG/L <0.50 4.7 5 .0 94 <br /> % Recovery = (Spike Sample Result -- Sample Result)*100/Spike Concentration <br /> RPD (Relative % Difference) _ (Spiked Sample - Blank Result)*100/Average Result <br />