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iIT FIELD ANALYTICAL SERVICES <br /> Date z9-Jul-93 4585 PACHECO BOULEVARD <br /> MARTINEZ, CA <br /> I <br /> Quality Control Summary <br /> EPA Methods 8020 (BTEX) and Modified 8015 (Gasoline and Diesel) <br /> 1, <br />' Water Matrix Spike Results <br /> Sample ID 071693MW1 I <br /> Spike Sample MS MSD %Rec RPD <br />' Parameter Amount Result % Recovery %Recovery Limits RPD Limits <br /> Benzene NIA <0 5 u IL 84% 92% I 70-130 9% 15% <br /> Toluene NIA <0 5 u /L 83% 94% 70-130 12% 15% <br /> Ethylbenzene N/A <0 5 ug1L 89% 93% 60-140 4% 15% <br /> Total Xylenes N/A <0 5 u /L 94% 100% 60 140 6% 15% <br /> TPH-Gas NIA NIA N/A N/A 60-140 NIA 15% <br /> TPH Diesel N/A NIA N/A NIA 1 50 140 N/A 25% <br /> Laboratory Control Spike Results <br /> Sample ID Blank Water <br /> Spike Sample LCS LCSD %Rec RPD <br /> Parameter Amount Result % Recover % Recovery Limits RPD Limits <br /> Benzene NIA <O 5 u /L N/A N/A 70 130 N/A 15% <br /> Toluene N/A <0 5 u /L NIA N/A I 70-130 N/A 15% <br /> Ethyibenzene NIA <0 5 u IL NIA N/A 60-140 NIA 15% <br />' Total Xylenes NIA <0 5 u /L NIA N/A 60 140 NIA 15% <br /> TPH-Gas NIA <50 u /L N/A NIA 60-140 N/A 15% <br /> TPH Diesel 833 u IL <50 ug/L 1 57% NIA 50 140 N/A 25% <br /> i <br /> i <br /> MS Matrix Spike i <br /> MSD Matrix Spike Duplicate <br />' LSC Laboratory Control Spike <br /> LSCD Laboratory Control Spike Duplicate <br /> RPD Relative Percent Difference <br /> I <br /> TPH-Gee Total Petroleum Hydrocarbons as gasoline I <br /> TPN-Diesel Total Petroleum Hydrocarbons as diesel <br /> NIA Sample not spiked with this parameter <br /> i <br /> o <br /> 1 <br /> Supervising Chemist ---I el, <br /> 682A 192 <br /> I <br />