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Y <br /> Plans for various analytical procedures. <br /> Quality control: <br /> The routine application of procedures such as blanks, spikes <br /> and spike duplicates for obtaining prescribed- standards of <br /> Performance in the measurement process. <br /> RCRA: <br /> The Resource Conservation and Recovery Act. <br /> 1 <br /> i <br /> Reagent Grade: <br /> Analytical Reagent (AR) Grade, AGS Reagent Grade and Reagent <br /> Grade are synonymous terms for reagents which conform to the <br /> current specifications of the committee on Analytical <br /> Reagents of the American Chemical Society. <br /> Representativeness: <br /> i The degree to which data accurately and precisely represents <br /> a characteristic population, parameter variations of a <br /> sampling point or an environmental condition. <br /> 1 ample. <br /> A discreet representative part or a single item from a larger <br /> group presented to the laboratory for analysis. <br /> Duplicate Samples: <br /> Two replicate aliquots taken from the same source for which <br /> determination of composition or contamination is requested or <br /> required. <br /> Reference Sample: <br /> A sample prepared from an independent standard than that of <br /> the calibration standard but within the calibration range <br /> 21 <br />