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GAS CHROMATOGRAPHY - QUALITY CONTROL <br /> BLANK SPIKE <br /> Test MOD EPA 8015-CDCHS (FUEL HYDROCARBONS/BTXE) ATI I.D. - : 510257 Page* <br /> Blank Spike #: 59778 Date Extracted: N/A <br /> Client : ALISTO ENGINEERING Date Analyzed : Ol-Nov-95 <br /> Project # : G620560/10-037-05-002 Sample Matrix : WATER <br /> Project Name : BP SITE#11192/1403 COUNTY CLUB BLVD, STOCKTON, CA <br /> =Pa=ameters -----------Units --Blank-- --- --Spiked-- -- ---gpike ------- <br /> Result Sample Conc. Rec <br /> ------------ -- - <br /> BENZENE 5-0- <br /> UG/L <O .SO 4 .6 - - 92 - <br /> TOLUENE UG/L X0.50 4 . 9 5. 0 98 <br /> t Recovery = (Spike Sample Result - Sample Result) *100/Spike Concentration <br /> RPD (Relative t Difference) _ (Spiked Sample .- Blank Result) *100/Average Result <br /> i <br />