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J�Analytical Technologies,Inc. <br /> GAS CHROMATOGRAPHY - QUALITY CONTROL • <br /> BLANK SPIKE <br /> Page 11 <br /> Test ; MOD EPA 8015-CDOHS (FUEL HYDROCARBONS/BT%E) ATI I .D. 502225 <br /> Blank Spike #: 54705 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 Name BP SITE#r1:1927STOCKTON;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 4.4 5 .0 88 <br /> Recovery = (Spike Sample Result - Sample Result)*100/Spike Concentration <br /> RPD (Relative % Difference) _ (Spiked Sample - Blank Result)*100/Average Result <br /> • <br /> • <br />