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Project Number SFB-175-0204 72 <br /> Consultant Project Number 16000250-044 <br /> Contract Number N46CWCO244-9-X <br /> Facility Number Not Given <br /> Work Order Number C008790 <br /> Report Issue Date September 5 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 Soli <br /> EPA Method 8020/8015 <br /> Date of Analysts 08/30/90 Client ID SC 38-8 <br /> Sample Used C008641-18 Units mg/Kg <br /> Sample Concentration MS, % MSD, % <br /> Analyte Result Added MS Result Recovery MSD Recovery <br /> Result <br /> Benzene <0 005 286 258 90 243 85 <br /> Toluene <0 005 286 261 1 91 245 86 <br />• Ethylbenzene <0 005 286 265 93 1 2 49 87 <br /> Xylene total <0015 858 796 93 749 87 <br /> Acceptability Limitsl <br /> Analyte RPD, % Maximum RPD, % % Recovery <br /> Benzene 6 30 50 - 112 <br /> Toluene 6 30 50 - 108 <br /> Ethylbenzene 7 30 50 - 113 <br /> Xylene (total) 7 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 previous <br /> quarter <br />. GTFL Concord,CA Page 7 of 7 <br /> C008790 DOC GTE <br /> L <br /> E N V,R O N M E N T A L <br /> LABORATORIES INC <br />