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Project Number SF13-175.0204 72 <br /> Consultant Protect Number 16000-250-044 <br /> Contract Number N46CWCO244-9-X <br /> Facility Number 9-6155 <br /> Work Order Number 0009164 <br /> Report Issue Date September 13, 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 1n $oil <br /> EPA Method 8020/8015 <br /> Date of Analysis 09/07/90 Client I MW-14(28-30) <br /> Sample Used C009075-06 Units mg/Kg <br /> Sample Concentration MS, % MSD MSD, % <br /> Analyte Result Added MS Result Recovery Result Recovery <br /> Benzene <0 005 286 216 76 212 74 <br /> Toluene <0 005 286 216 76 215 75 <br />• Ethylbenzene <0 005 2 86 223 78 226 79 <br /> Xylene (total) <0 015 8 58 677 79 682 79 <br /> Acceptability L1mits1 <br /> Analyte RPD, % Maximum RPD, % % Recovery <br /> Benzene 3 30 50- 112 <br /> Toluene 1 30 50 - 108 <br /> Ethylbenzene 1 30 50 - 113 <br /> Xylene (total) 0 30 50 - 114 <br /> <# = Not Detected at the indicated detection limit <br /> I = Acceptability limits are derived from the 99% confidence interval of all samples during the <br /> previous quarter <br /> I <br /> GTEL Concord CA Page 7 of 7 <br /> 000916.1 DOG <br /> GTEL <br /> E N Vi R O N u`N TA L <br /> ® 1A809ATORIEi INC <br />