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Project Number SF13-175-0204 72 <br /> Consultant Project Number 16000.242-044 <br /> Contract Number N46CWCO244-9-X <br /> Facility Number 9-6155 <br /> Work Order Number C009120 <br /> Report Issue Date September 11, 1990 <br /> Table 5 <br /> MATRIX SPIKE (MS) AND MATRIX SPIKE DUPLICATE (MSD) RECOVERY <br /> AND RELATIVE PERCENT DIFFERENCE (RPD) REPORT <br /> Purgeabie Aromatics and Total Petroleum Hydrocarbons <br /> as Gasoline In Sal <br /> EPA Method 8020/8015 <br /> Date of Analysis 09/06/90 Client ID 2-A,B,C <br /> Sample Used C009120-02 Units mg/Kg <br /> Sample Concentration MS, % MSD, % <br /> Analyte Result Added MS Result Recovery MSD Recovery <br /> Result <br /> Benzene NO 286 212 74 210 73 <br /> Toluene NO 286 213 74 211 74 <br />. Ethyibenzene NO 286 219 77 214 75 <br /> X lene total NO 858 637 74 625 73 <br /> Acceptability Llmitsl <br /> Analyte RPD, % Maximum RPD, % % Recovery <br /> Benzene 1 30 50 - 112 <br /> Toluene 0 30 50 - 108 <br /> Ethylbenzene 3 30 50 - 113 <br /> Xylene (total) 1 30 50 - 114 <br /> # = Not Detected at the Indicated detection lima <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 /> CCC9 120 DOC GTE L <br /> � �1 cN VIRON 46N T.kt <br /> ow A1&0RAT0R;ES INC <br />