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Data Usability Summary Page 4 of 4 <br /> high due to biogenic material that was removed during silica gel analysis. Data were not qualified for the <br /> TPHd fuel pattern notes. <br /> Completeness <br /> 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 and matrix are 100 percent. <br /> Comparability <br /> Based on the data evaluation, it was concluded that the data are comparable with other laboratory data for <br /> similar samples and sample conditions. The sample collection techniques,EPA test methods, detection <br /> limits, analytical laboratory,units of measure, and sample preparation procedures were selected to ensure <br /> data comparability. <br /> SUMMARY <br /> Based on SAIC's evaluation, all analytical data are usable as qualified for the purpose of determining <br /> chemical concentrations in groundwater at the site. <br /> Data evaluated for this report were qualified J for results reported between the laboratory's MDL and <br /> LOQ, and U for results associated with method blank contamination. Qualified data with applicable <br /> reason codes are shown in Table 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 /> m rr <br /> MMFA' r%�® <br /> From Science[osolullons <br />