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Project Number SFB-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 0010176 <br /> Report Issue Date October 10 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 10/05/90 Client ID 1-A,B,C <br /> Sample Used C010176-01 Units mg/Kg <br /> Sample Concentration MS, % MSD, % <br /> Analyte Result Added MS Result Recovery MSD Recovery <br /> Result <br /> Benzene ND 286 223 78 2 22 78 <br /> Toluene ND 286 235 82 235 162 <br /> Ethylbenzene ND 286 245 86 252 88 <br /> Xylene (total) ND 858 755 88 755 88 <br /> Acceptability Ljmjtsl <br /> Analyte RPD, % Maximum RPD, % % Recovery <br /> Benzene 0 30 50 - 112 <br /> Toluene 0 30 50 - 108 <br /> Ethylbenzene 2 30 50 - 113 <br /> Xylene (total) 0 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 /> GTEL Concord CA Page 7 of 7 <br /> C010176 DCC GTE L <br /> EN VIROID N?N T A L <br /> ® (90QA10RI,S INC <br />