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(A) ,r <br /> J�AnalyticalTechnologies,lnc. - M <br /> GAS CHROMATOGRAPHY QUALITY CONTROL <br /> BLANK SPIKE i <br /> Page t <br /> Test MOD EPA 8015-COCHS (FUEL HYDROCARBONS/BTXE) ATI Z.D. 507252 <br /> Blank Spike # 57936 Date Extracted: N/A <br /> Client ALISTO ENGINEERING Date Analyzed 02-AUG-95 <br /> Praiect # PENDING/10-037-05-001 Sample Matrix WATER <br /> Project Name BP SITE#11192/1403 COUNTRY CLUB BLVD. STOCKTON, CA <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 5 .0 5.0 100 <br /> % Recovery = (Spike Sample Result - Sample Result)*100/Spike Concentration <br /> RPD (Relative % Difference) _ (Spiked Sample - Blank Result)*100/Average Result <br /> r <br />