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sampling points is likely. Examining the scatter of data from various locations, therefore, <br /> is not a meaningful method to determine data validity. The data will be <br /> reviewed and apparent abnormalities (e.g.,unexpected order-of-magnitude differences <br /> among samples)will be investigated by reviewing sampling procedures and laboratory <br /> QC results. <br /> • Regarding completeness: <br /> - Computing the fraction of measurement data that remain valid after identifying any <br /> data of questionable accuracy or precision. <br /> -Completeness will be assessed on the basis of numbers of valid samples and <br /> distribution of sites at which valid samples were taken. The completeness target is 80 <br /> percent valid soil samples and 95 percent valid groundwater samples. If actual <br /> completeness is less than the target, an assessment will be made as to whether enough <br /> data have been generated to close existing data gaps. <br /> If a blank sample is reported to contain a quantifiable concentration of any pollutant, an attempt <br /> will be made to identify the cause. Particular attention will be given to examining the protocol for <br /> blank preparation and consulting the institution from which the sample containers were obtained. <br /> M ain\D:AEnvironmenta1\LN CV\10152007.wpd 67 <br />