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Project Number SF3-175-0204 72 <br /> Consultant Project Number 16000-250-044 <br /> Contract Number N46CWCO244-9 X <br /> Facility Number 9-6155 <br /> Work Order Number 0010838 <br /> Report Issue Date November 5 1990 <br /> Table 5 <br /> MATRIX SPIKE (MS) AND MATRIX SPIKE DUPLICATE (MSD) RECOVERY <br /> AND RELATIVE PERCENT DIFFERENCE (RPD) REPORT <br /> Total Petroleum Hydrocarbons <br /> as Gasoline In Soli <br /> EPA Method 8015 <br /> Date of Analysis 11/01/90 Units mg/Kg <br /> Sample Used C010850-04 Client ID SP-4 <br /> Sample Concentration MS, % MSD, % <br /> Analyte Result Added MS Result Recovery �SDt Recovery <br /> Benzene NO 286 255 89 2 49 87 <br /> Toluene NO 1 286 256 J 90 2 49 87 <br /> Ethylbenzene ND 286 254 89 2 48 87 <br /> Xylene (total) NO S 58 7 49 87 7 35 86 <br /> Acceptability Limits' <br /> Analyte RPD, % Maximum RPD, % % Recovery <br /> Benzene 2 30 50 - 112 <br /> Toluene 3 30 50 - 108 <br /> Ethylbenzene 2 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 /> a <br /> GTEI_Concord CA Page 7 of 7 <br /> 0010838 DCC GTEL <br /> ENV 1 4 0 4 M E 4 S A L <br /> ® LASO4AfO43ES SNC <br />