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1 � <br /> Project Number: SFB-175-0204.72 <br /> Consultant Project Number: 203-175-3289 <br /> Contract Number: M46CWCO244-9-X <br /> Facility Number: 9-0342 <br /> Work Order Number: D002237 <br /> Report Issue Date: February 20, 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: 02/14/90 Client ID: TANK #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 2.22 78 2.29 80 <br /> Toluene ND 2.86 2.21 77 2.32 81 <br /> Ethylbenzene ND 2.86 2.30 80 2.40 84 <br /> Xytene (total) ND 8.58 6.88 80 7.26 85 <br /> Acceptability Limitsl <br /> Analyte RPD, % Maximum RPD, % % Recovery <br /> Benzene 3 30 53 - 114 <br /> Toluene 5 30 56 - 110 <br /> Ethylbenzene 5 30 57 - 112 <br /> Xylene (total) 6 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 /> D002237.DOC <br /> GTEL <br /> E N V I R O N M E N T A L <br /> LABORATORIES, INC. <br />