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Appendix D.1:Data Usability Summary <br /> Completeness <br /> Completeness is defined as the number of valid results(i.e.,those not rejected)divided by the total <br /> number rejected. Evaluation of the data against the QC objectives determined that the percentages of <br /> valid data for each method are 100 percent,with no data rejected for this investigation. <br /> Comparability <br /> Evaluation of the data indicated that they are comparable with other laboratory data for similar samples <br /> and 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 /> SAIC's evaluation concluded that all analytical data contained in sample group 1075641, 1079254, <br /> 1079255, 1079256, and 1079257 are usable as qualified for the purpose of determining chemical <br /> concentrations in groundwater at Vernalis Offsite. <br /> Data associated with sample delivery groups for this sampling event were qualified for results reported <br /> between the laboratory MDL and LOQ, surrogate%Rs,and blank detections. Qualified data with <br /> applicable reason codes are shown in Table D-1. <br /> Analytical data collected in support of this investigation are considered precise, accurate,representative, <br /> complete, and comparable, and they may be used for their intended purposes unless noted otherwise. <br /> D.1-4 <br /> From Science to Solutions <br />