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Definition of terms: <br /> R1 Result of unspiked laboratory sample used for matrix spike determination. <br /> SP CONC(or Spike Conc.) Spike concentration added to sample or blank <br /> MS Matrix Spike sample result <br /> MSD Matrix Spike Duplicate sample result <br /> %MS Percent recovery of MS: {(MS-R1)/SP CONC)x100 <br /> %MSD Percent recovery of MSD: {(MSD-R1)/SP CONC)x 100 <br /> RPD(for MS/MSD) Relative Percent Difference:{(MS-MSD)/(MS+MSD))x 100 x 2 <br /> LCS Laboratory Control Sample result <br /> LCSD Laboratory Control Sample Duplicate result <br /> %LCS Percent recovery of LCS: {(LCS)/SP CONC)x100 <br /> %LCSD Percent recovery of LCSD: {(LCSD)/SP CONC)x 100 <br /> RPD(for LCS/LCSD) Relative Percent Difference:{(LCS-LCSD)/(LCS+LCSD))x 100 x 2 <br /> ACP%LCS Acceptable percent recovery range for Laboratory Control Samples. <br /> ACP%MS Acceptable percent recovery range for Matrix Spike samples <br /> ACP RPD Acceptable Relative Percent Difference <br /> D Detectable, result must be greater than zero <br /> Qual A checked box indicates a data qualifier was utilized and/or required for this analyte <br /> see attached explanation. <br /> ND Analyte Not Detected <br /> ©Orange Coast Analytical, Inc 8 of 8 Rev1.0 04/09/20 <br />