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z, <br /> Accuracy measurements%ill be carried out at a minimum frequency of 1 in 20 or 1 per <br /> set. <br /> 4.23 REPRESENTATIVENI-'SS <br /> Representativeness is a measure of noel closely the measured results reflect the actual <br /> concentration or distribution of the chemical compounds in the soil sampled. Sampling <br /> plan design, sampling techniques, and sample handling protocols (e.g., storage, preser- <br /> f 6 nation,and transportation) have been developed and are discussed in Section ow this <br /> een follow <br /> document. Proper documentation vrill establish that protocols have bedd and <br /> sample identification and integrity assured. Field duplicates obtained at a minimum 10 <br /> percent or one-per-day frequency will be used to assess field and transport <br /> contaminatio.: and method variation. Laboratory sample retrieval, storage, and han- <br /> ures have also been developed and are discussed in subsequent sections of <br /> dung proced <br /> this document. Laboratory method blanks will be runt at the minimum frequency of <br /> 5 percent or one per srt to assess laboratory contamination. <br /> 4.2.4 CONIPLrTENESS <br /> Completeness is a measure of the amount of valid data obtained from the analytical <br /> measurement system. The quantitative definition of completeness (C) is given below: <br /> C = Number of acceptable data per target OC limits x 100 <br /> (total number of data points) <br /> The target completeness objective for the overall project will be 90 percent; the actual <br /> completeness for this field program may vary depending on the intrinsic nature of the <br /> ty contra] reviews. <br /> samples. The completeness of the data will be assessed during quali <br /> r 4.2.5 COMPARABILITY <br /> Comparability of the data will be maintained by using EPA-defined procedures where <br /> -- available. Data comparability vrill be maintained by using consistent methods and con- <br /> sistent units. Standard units to be used are- <br /> • mg/kg :or all analytical results for soil (solid) samples <br /> • ni.0 fpr all analytical results for water samples <br /> 4.2.6 DETECTION LIMITS <br /> The detection limits for the various method analyses are presented in Appendix C. <br /> w. sro;u'l5'1%Vh0ilaa1 4-3 <br />