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' Y I <br /> 4A. AnalyticalTechnoiogies,lnc. <br /> GAS CHROMATOGRAPHY - QUALITY CONTROL <br /> BLANK SPIKE <br /> page 9 <br /> Test MOD EPA 8015-CDOHS (FUEL HYDROCARBONS/BTXE) ATT I.D. 504253 <br /> Blank Spike #: 56111 Date Extracted: N/A <br /> Client : ALISTO ENGINEERING Date Analyzed 27-APR-95 <br /> Project # G317901/10-037-03-004 Sample Matrix WATER <br /> Project Name BP SITE#11192/COUNTRY CLUB BLVD, STOCKTON CA <br /> ------------------------------------------------------------------------ <br /> P,:rameters Units Blank Spiked Spike %- <br /> Result Sample Conc. Rec <br /> ----------------------------------------------------------------- <br /> BENZENE UG/L <0.50 5.1 5. 0 102 <br /> TOLUENE UG/L X0.50 5.3 5.0 106 <br /> %- Recovery = (Spike Sample Result - Sample Result) *100/Spike Concentration <br /> RPD (Relative Difference) _ (Spiked Sample - Blank Result) *100/Average Result <br /> i <br />