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IT FIELD AN ES <br /> ANALYTICAL SERVICES <br /> Date: 27-Oct-93 4585 PACHECO BOULEVARD <br /> MARTINEZ, CA <br />' Quality Control Summary <br /> EPA Methods 8020 (BTEX) and Modified 8015 (Gasoline and Diesel) <br /> Watev-Matrix Spike Results <br /> Sam le ID. 102293MW3(BTEX)1102093MW5(GAS) <br />' Spike Sample MS M&G %Rea RPD <br /> Parameter Amount.. Result 96 Recovery' %Recovery Limtta RPD Limits <br /> Benzene 4ug/L <0.3ug/L 84% 86% 70-130 2% 15% <br /> Toluene 4ug/L <0.3ug/L 67% 61% 70-130 9% 15% <br /> Ethylbenzene 4ug/L <0.3ug/L 85% 78% 60-140 9% 15% <br /> Total Xylenes 8ug/L <0.5ug/L 94% 81% 60-140 15% 15% <br /> TPH-Gas 500ug/L <50ugIL 110% 101% 60-140 9% 15% <br /> TPH-Dieset NIA NIA NIA NIA 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 % Recovery %Recovery Limits RPO Emits <br /> Benzene NIA NIA NIA N/A 70-130 NIA 15% <br /> Toluene NIA NIA N/A N/A 70-130 NIA 15% <br /> Ethylbenzene NIA NIA N/A N/A 60-140 NIA 15% <br /> Total Xylenes N/A N/A N/A N/A 60-140 NIA 15% <br /> TPH-Gas N/A NIA N/A N/A 60-140 NIA 15% <br /> ' TPH-Diesel 2.5mg/L N/A 60% 50% 50-140 18% 25% <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: <br /> WA-1-92 <br />