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1 <br /> 4.1.4 COMPLETENESS <br /> The number of valid results divided by the number of possible results determines the <br /> completeness of the analytical results. The objective is to recover at least 90 percent of the <br /> ' planned data to support field efforts. <br /> 4.1.5 COMPARABILITY <br /> The objective for comparability is to ensure that the analytical results collected during <br /> confirmation sampling are comparable to Site knowledge and address applicable criteria. As <br /> ' discussed in Section 9.4.4 of the RAW, all soil gas analytical results will be compared the <br /> California Human Health Screening Level (CHHSL) for commercial/industrial land use (Cal EPA, <br /> 2005). The QAPP addresses comparability by specifying the appropriate laboratory methods <br /> that are in accordance with current standards approved by the USEPA. <br /> t <br /> 1 <br /> 1 <br />