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Data Usability Summary <br /> Completeness <br /> 1 Completeness is defined as the number of valid results (i.e., those not rejected)divided by the total <br /> number rejected. Based on this evaluation of the data against the QC objectives,the percentages of valid <br /> data for each method are 100 percent, with no data rejected for this investigation. <br /> Comparability <br /> Based on the data evaluation,the data are comparable with other laboratory data for similar samples and <br /> sample conditions. The sample collection techniques,EPA test methods,detection limits,analytical <br /> laboratory,units of measure, and sample preparation procedures were selected to ensure data <br /> comparability on this project. <br /> SUMMARY <br /> Based on SAIC's evaluation,all analytical data contained in sample group 1086177, 1100978, 1101231, <br /> is usable as qualified for the purpose of determining chemical concentrations in groundwater at the <br /> Vernalis Pump Station location located in Vernalis,California. <br /> Data associated with SDGs for this sampling event were qualified for results reported between the <br /> laboratory MDL and LOQ, surrogate percent recoveries,MS/MSD recoveries,LCS recoveries and <br /> Duplicate relative percent differences. Qualified data with applicable reason codes are shown in Table <br /> B-1. <br /> ' Unless noted otherwise, analytical data collected in support of this investigation are considered precise, <br /> accurate, representative,complete, and comparable, and they may be used for their intended purposes. <br />