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` GAS CHROMATOGRAPHY - QUALITY CONTROL <br /> BLANK SPIKE <br /> Page 12 <br />'est : MOD EPA 8015-CDOHS (FUEL HYDROCARBONS/BTXE) ATI I .D. 510257 <br />-lank Spike # : 59702 Date Extracted: N/A <br /> tient ALISTO ENGINEERING Date Analyzed : 31-OCT-95 <br />>roject # G620560/10-037-05-002 Sample Matrix : WATER <br /> Iroject Name BP SITE#11192/1403 COUNTY CLUB BLVD, STOCKTON, CA <br /> ----------------------------- <br /> ,.rameters Units Blank Spiked Spike %. <br /> Result Sample Conc. Rec <br /> -------------------------------------- <br />'.ENZENE UG/L <0.50 4 .8 5 . 0 96 <br /> ]LUENE UG/L <0.50 5 .0 5.0 100 <br /> s Recovery = (Spike Sample Result - Sample Result) *100/Spike Concentration <br /> PD (Relative t Difference) _ (Spiked Sample - Blank Result) *100/Average Result <br />