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IT FIELD ANALYTICAL SERVICES <br /> Date 4-Feb-93 4585 PACHECO BOULEVARD <br /> MARTINEZ, CA <br /> I <br /> I Quality Control Summary <br /> EPA Methods 8020 (BTEX) and Modified 8015 (Gasoline and Diesel) <br /> Soil Matrix Spike Results <br /> Sample ID SB-4-4-2 <br /> Spike Sample MS MSD %Rec RPO <br /> Parameter Amount Result %Recovery % Recovery Limits RPD Limits <br /> Benzene 50 ug/Kg <5 ug/Kg 109% 100% 70-130 9% 15% <br />' Toluene 50 ug/Kg <5 ug/Kg 115% 114% 70-130 1% 15% <br /> Ethylbenzene 50 ug/Kg ¢5 ug/Kg 95% 90% 60-140 5% 15% <br /> Total Xylenes 150 ug/Kg C 10 ug/Kg 98% 95% 60-140 3% 15% <br /> TPH-Gas NIA NIA NIA NIA 60-140 NIA 15% <br /> TPH-Diesel 37 4 mg/Kg <5 mg/Kg 56% 50% 50-150 11% 15% <br /> Laboratory Control S ike Results <br /> Sample ID. Blank Water <br />' Spike Sample LCS LCSD %Ree RPD <br /> Parameter Amount Result %Recovery % Recovery Limits RPD Limits <br /> Benzene N/A N/A NIA NIA 70-130 NIA 15% <br />' Toluene NIA NIA NIA NIA 70-130 NIA 15% <br /> Ethylbenzene N/A NIA NIA N/A 60-140 NIA 15% <br /> I <br /> Total Xylenes NIA NIA N/A NIA 60-140 NIA 15% <br /> TPH-Gas NIA NIA NIA NIA 60-140 NIA 15% <br /> TPH-Diesel NIA N/A N/A NIA 50-160 N/A 15% <br /> I <br /> ' MS Matrix Spike <br /> MSD Matrix Spike Duplicate <br /> LSC Laboratory Control Spike <br /> ' LSCD Laboratory Control Spike Duplicate <br /> RPD Relative Percent Difference <br /> TPH-Gas Total Petroleum Hydrocarbons as Gasoline <br /> TPH-Diesel Total Petroleum Hydrocarbons as Diesel <br /> N/A Sample not spiked with this parameter <br /> Supervising Chemist �/�� 682A 1 92 <br />