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A. AnalyticaiTechnologies,inc. <br /> GAS CHROMATOGRAPHY - QUALITY CONTROL <br /> BLANK SPIKE <br /> Page 10 <br /> Test MOD EPA 8015-CDOHS (FUEL HYDROCARBONS/BTXE) ATI I.D. 502225 <br /> Blank Spike #: 54689 Date Extracted: N/A <br /> Client ALISTO ENGINEERING Date Analyzed : 24-FEB-95 <br /> Project # G317901/10-037-03/003 Sample Matrix : WATER <br /> Project Flame BP SITE #11192/STOCKTON, 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 4.7 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 />