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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 />4-27 <br />