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Project Number: SFO-175-0204.72 <br /> Consultant Project Number: 203-175-3289 <br /> Contract Number: N46CWCO244-9-X <br /> Facility Number: 9-0342 <br /> Work Order Number: D001760 <br /> Report Issue Date: February 8, 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: 02/03/90 Client ID: P-2 <br /> Sample Used: 02 Units: mg/Kg <br /> Sample Concentration MS, % MSD, % <br /> Analyte Result Added MS Result Recovery MSD Result Recovery <br /> Benzene ND 2.86 2.68 94 2.63 92 <br /> Toluene ND 2.86 2.65 93 2.58 90 <br /> Ethylbenzene NO 2.86 2.71 1 95 2.61 91 <br /> Xylene (total) ND 8.58 8.19 95 7.93 92_J <br /> Acceptability Limitsl <br /> Analyte RPD, X Maximum RPD, % % Recovery <br /> Benzene 2 30 53 - 114 <br /> Toluene 3 30 56 - 110 <br /> Ethylbenzene 4 30 57 - 112 <br /> xylene (total) 3 30 57 - 112 <br /> ND = Not Detected above the statistical detection limit <br /> 1 = Acceptability limits are derived from the 99% confidence interval of all samples during the <br /> previous quarter. <br /> GTEL Concord, CA Page 7 of 7 <br /> D001760.DOC <br /> %Q-2w GTE L <br /> E N V I R O N M E N T A L <br /> LABORATORIES. INC. <br />