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GAS CHROMATOGRAPHY - QUALITY CONTROL <br /> r:rr;:il <br /> MSMSD <br /> Page 10 <br /> Test MOD EPA 8015-CDOHS (FUEL HYDROCARBONS/BTSE) ATI I.D. 509017 <br /> MSMSD # 78532 Date Extracted: N/A <br /> Client ALISTO ENGINEERING Date Analyzed : 14-SEP-95 <br /> Sample Matrix : WATER <br /> Project # ???????/10-151-04-001 REF I.D. : 509017-03 <br /> Project Name: BP SITE#11195/16500 S. HWY 3-5, LATHROP,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 5.5 110 2 <br /> TOLUENE UG/L <0.50 5.0 5.2 104 5.2 104 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 />