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A, Ana lytical Tech nolog ies,lnc. <br /> GAS CHROMATOGRAPHY - QUALITY CONTROL . <br /> MSMSD <br /> Page 7 <br /> Test MOD EPA 8015-CDOHS (FUEL HYDROCARBONS/BTXE) ATI I.D. 504254 <br /> MSMSD # 75312 Date Extracted: N/A <br /> Client ALISTO ENGINEERING Date Analyzed 02-MAY-95 <br /> Sample Matrix WATER <br /> Project # G317904/10-136-03-004 REF I.D. 504258-01 <br /> Project Name: BP SITE#11193/W. HAMMER LANE, STOCKTON CA <br /> ------------------------------------------------------------------------------------------------ <br /> Parameters Units Sample Conc Spiked % Dup Dup RPD <br /> Result Spike Sample Rec Spike Rec <br /> ------------------------------------------------------------------------------------------------ <br /> BENZENE UG/L <0.50 5.0 5.4 108 5 .3 106 2 <br /> TOLUENE UG/L <0.50 5.0 5 .3 106 5.3 106 0 <br /> % Recovery = (Spike Sample Result - Sample Result) *100/Spike Concentration <br /> RPD (Relative Difference) _ (Spiked Sample Result - Duplicate Spike Result) *100/Average Result <br /> i <br />