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DATA VALIDATION REASON CODE DESCRIPTIONS <br /> The following descriptions provide brief explanations of the cause for <br /> qualification of the data results determined in the data review process These reason <br /> codes are used in combination with the data qualifier, i e "U" indicates the analyte <br /> i <br /> is non-detect due to method blank contamination <br /> Flag Data Qualifier Exolanation <br /> a Analytical sequence deficiency or omission <br /> b Gross compound breakdown (4,4 DDT/Endrin) <br /> c Calibration failure, poor or unstable response <br /> d Matrix spike/matrix spike duplicate imprecision or matrix duplicate imprecision <br />' e Laboratory duplicate control sample imprecision <br /> f Field replicate or duplicate imprecision <br /> g Poor chromatography <br /> h Holding time violation. <br /> I Internal standard failure. <br /> I Poor mass spectrographic performance <br /> 1 Laboratory control sample recovery failure <br /> em Matrix spike/matrix spike duplicate recovery failure. <br /> n Interference check sample recovery failure <br /> o Calibration blank contamination (Metals/Inorganics only). <br /> p Preparation blank contamination (Metals/l norganics only) <br /> q No valid quantitation column present <br /> r Linearity failure in initial calibration <br /> s Surrogate spike recovery failure (GC Organics and GC/MS Organics only) <br /> t Instrument tuning failure. <br /> u No confirmation column present (GC Organics only) <br /> w Retention time (RT) outside of RT window <br /> x Field blank contamination <br /> y Trip blank contamination. <br /> z Method blank contamination <br /> Q Other. <br /> TIMS01 01 <br />