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Ana lyticalTechnologies,lnc. <br /> GAS CHROMATOGRAPHY - QUALITY CONTROL <br /> .r <br /> BLANK SPIKE <br /> Page 6 <br /> Test MOD EPA 8015-CDCHS (FUEL HYDROCARBONS/BTXE) ATI I.D. 506152 <br /> Blank Spike #: 57238 Date Extracted: N/A <br /> Client ALISTO ENGINEERING Date Analyzed 22-JUN-95 <br /> Project # G317905/10-151-03/004 Sample Matrix WATER <br /> Project Name BP SITE#11195/LATHROP, CA <br /> --------------------•-------------------- <br /> Parameters Units Blank Spiked Spike % <br /> Result Sample Conc. Rec <br /> ------------------------------------------------------ <br /> BENZENE UG/L <0.50 4.5 5.0 90 <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 /> -' V <br />