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i <br /> included with the analytical results. <br /> 3. Laboratory Control Spike—A Laboratory Control Spike (LCS) is a sample that is spiked with <br /> known analyte concentrations, and analyzed at approximately 10 percent of the sample load <br /> in order to establish method-specific control limits. The LCS results associate with CIWMB <br /> samples will be attached on the LCS and LCS Duplicated Analysis Report. <br /> 4. Matrix Spike Results—A matrix spike is a sample that is spiked with known analyte - <br /> concentrations and analyzed at approximately 10 percent of the sample load in order to <br /> establish method-specific control limits. The matrix spike results associated with CIWMB <br /> samples will be attached on the Matrix Spike and Matrix Spike Duplicate Analysis Report. <br /> 5. Accuracy—Accuracy will be measured by percent recovery as defined by: , <br /> % Recovery= (measured concentration) x 100 <br /> (actual concentration) <br /> CIWMB 19 <br />