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61 w1do <br /> QUALITY CONTROL, DATA PERTAINING TO SAMPLE LOG 3067 <br /> Accuracy and Precision, Soil: <br /> Analysis Spike Recoveries* M** <br /> Benzene 102,104 2% <br /> Toluene 102,112 10% <br /> Ethyl Benzene 108,124 14% <br /> Xylenes 113,120 6% <br /> TPH as Gasoline 120,113 6% <br /> TPH as Diesel 98,96 2% <br /> Blank, Soil: <br /> Analysis Measured Ya]M <br /> Benzene <.005 mg/kg <br /> Toluene <.005 mg/kg <br /> Ethylbenzene <.005 mg/kg <br /> Xylenes <.005 mg/kg <br /> TPH as Gasoline <.5 mg/kg <br /> TPH as Diesel <10 mg/kg <br /> * 100 is the optimum value for a spike recovery. <br /> ** RPD is "Relative Percent Difference", which is defined as <br /> the difference of two values divided by their mean, expressed <br /> as a percentage. <br /> Western Envlrorurrenle! <br /> Science d TirchnddV <br /> 1045 Olive Drhre,Suile 3 <br /> Davis,CA 858!6 <br /> ate 753.9500 <br />