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GAS CHROMATOGRAPHY - QUALITY CONTROL <br /> BLANK SPIKE <br /> Page 11 <br /> Test 1 : MOD EPA 8015-CDOHS (FUEL HYDROCARBONS/BTXE) ATI I.D. 510035 <br /> Blank Spike #: ..59395 Date Extracted: . N/A <br /> Client 11ALISTO ENGINEERING Date Analyzed : 11-OCT-95" <br /> Project # ! 6620563/10-085-09-001 Sample Matrix : WATER <br /> Project Name BP SITE#11194/2375 TRACY BLVD TRACY CA ' <br /> .--------------------------------------------- --- <br /> Parameters Units Blank Spiked Spike % <br /> Result Sample Conc. Rec <br /> -------------------a------------------------- <br /> BENZENE UG/L <0.50 4.7 5.0 94 <br /> TOLUENE UG/L c0.50 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 6 <br />