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is not within the recovery criteria range, then the appropriate validation flag, as described in the <br /> applicable validation procedure, will be applied to the associated sample result. The laboratory <br /> will provide surrogate recovery acceptance criteria. <br /> Laboratory Control Samples <br /> Laboratory control samples analyzed by the laboratory following USEPA method protocols are <br /> compared with true values and acceptable ranges as indications of error and provide for <br /> implementation of corrective action. If a laboratory control recovery is not within the recovery <br /> criteria range, then the appropriate validation flag, as described in the applicable validation <br /> procedure, will be applied to the associated sample result. The laboratory will provide laboratory <br /> control sample recovery acceptance criteria. <br /> Field Duplicate Samples <br /> Field duplicate samples will be collected and analyzed in the same manner as the primary <br /> samples. They will be collected at a frequency of 10 percent of the total. Agreement between <br /> duplicate sample results will indicate acceptable sampling and analytical precision. The precision <br /> goal for field duplicate analyses will be plus or minus 30 RPD for aqueous samples. <br /> Environmental/LNC/workplan/Appendix3.wpd 15 <br />