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LFR Levine-Fricke <br /> G1.4.5 Comparability <br /> Comparability is the confidence with which one data set can be compared to other data. <br /> The objectives for this program are to produce data with the greatest degree of <br /> comparability possible. Comparability will be achieved using standard methods for <br /> sampling and analysis, reporting data in standard units, and using standard and <br /> comprehensive reporting formats. <br /> G1.4.6 Completeness <br /> Measurements of completeness (C) can be defined as the ratio of usable measurements <br /> obtained to the total number of planned measurements for an activity. Completeness <br /> can be defined as: <br /> (Number of usable data points) <br /> C = x100 <br /> (Total number of planned data points) <br /> Additionally, for a data set to be considered complete, the data set must contain all QC <br /> check analyses verifying precision, accuracy, and sensitivity for the analytical <br /> protocols. This will be determined during the data validation process. Following data <br /> validation and usability assessment, the percent completeness can be calculated. <br /> G2.0 LABORATORY AND INTERNAL QUALITY CONTROL CHECKS <br /> The analytical laboratories will follow their quality control procedures and analyzed the <br /> following QC samples as part of their internal procedures. <br /> G2.1 Field and Laboratory QC Samples <br /> Field duplicate samples will be collected by field personnel during sampling activities. <br /> In addition, the following QC samples will be prepared by the laboratory: laboratory <br /> replicates, MSs, method blanks, and method-specific QC samples. The following <br /> provides a summary of these different types of QC samples. <br /> Co-Located Samples: Soil samples collected in close proximity (referred to as co- <br /> located samples) are used to serve as field duplicates. The co-located samples measure <br /> the combined random error(imprecision)due to sampling and analysis as well as the <br /> short-range heterogeneity of the sampled medium between the juxtaposed locations or <br /> times. The sample containers for the co-located samples will be filled, labeled, and <br /> handled in the same manner as other field samples. One co-located sample will be <br /> collected for each analytical method for each sampling day. <br /> Equipment Blank Samples:Equipment blank samples are collected by pouring <br /> laboratory supplied water over reusable decontaminated sampling equipment to confirm <br /> Final_RAP_Traoy_9.18.03(8nal).aoc Page G-7 <br />