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Project Number SF&175.0204 72 <br /> Consultant Project Number 1600-250-044 <br /> Contract Number N46CWCO244-9-X <br /> Facility Number 9.6155 <br /> Work Order Number 0009524 <br /> Report Issue Date September 27 1990 <br /> Table 5 <br /> MATRIX SPIKE (MS) AND MATRIX SPIKE DUPLICATE (MSD) RECOVERY <br /> AND RELATIVE PERCENT DIFFERENCE (RPD) REPORT <br /> Purgeable Aromatics and Total Petroleum Hydrocarbons <br /> as Gasoline in Soil <br /> EPA Method 8020/8015 <br /> Date of Analysis 09/24/90 Client 10 6-ABC <br /> Sample Used C009524-06 Units mg/Kg <br /> Sample Concentration MS, % MSD, % <br /> Analyte Result Added MS Result Recovery MSD Recovery <br /> Result <br /> Benzene <0 005 286 238 83 237 83 <br /> Toluene <0 005 286 245 86 2 45 86 <br /> Ethylbenzene <0 005 286 243 85 2 40 84 <br /> Xylene (total) <0 015 856 714 83 715 84 <br /> Acceptability Limits' <br /> Analyte RPD, % Maximum RPD, % % Recovery <br /> Benzene 0 30 50 - 112 <br /> Toluene 0 30 50 - 108 <br /> Ethylbenzene 1 30 50 - 113 <br /> Xylene (total) 1 30 50 - 114 <br /> <# = Not Detected at the indicated detection limit <br /> 1 = Acceptability limits are derived from the 99% confidence interval of all samples during the <br /> previous quarter <br /> i GTEL Concord CA Page 7 of 7 <br /> s 0009524 DCC <br /> E n V IQ ONµE N T At <br /> ® LABORATORIES INC <br />