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•/ Anal ticalTechnolo ies Inc. <br /> Y 9 <br /> GAS CHROMATOGRAPHY - QUALITY CONTROL <br /> MSMSD <br /> Page 7 <br /> Test : MOD EPA 8015-CDOHS (FUEL HYDROCARBONS/BTXE) ATT I.D. 507252 <br /> MSMSD # : 77425 Date Extracted: N/A <br /> Client : ALISTO ENGINEERING Date Analyzed : 01-AUG-95 <br /> Sample Matrix : WATER <br /> Project # : PENDING/10-037-05-001 REF I.D. : 507190-07 <br /> Project Name: BP SITE#11192/1403 COUNTRY CLUB BLVD. STOCKTON, CA <br /> ^ - -- <br /> -------------- <br /> ParametersUnits Sample Conc Spiked % Dup Dup RPD <br /> Result Spike Sample Rec Spike % Rec <br /> ----------------------------------------------------------------- <br /> BENZENE UG/L <0.50 5.0 4.6 92 4.7 94 2 <br /> TOLUENE UG/L <0.50 5.0 4.9 98 5.0 100 2 <br /> $ Recovery = (Spike Sample Result - Sample Result) *100/Spike Concentration <br /> RPD (Relative Difference) _ (Spiked Sample Result - Duplicate Spike Result) *100/Average Result <br />