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. Protect Number SFB-175-0204 72 <br /> Consultant Protect Number 16000-250-044 <br /> Contract Number N46CWCO244-9-X <br /> Facility Number 9-6115 <br /> Work Order Number 0010348 <br /> Report Issue Date October 18, 1990 <br /> Table 5 <br /> MATRIX SPIKE (MS) AND MATRIX SPIKE DUPLICATE (MSD) RECOVERY <br /> AND RELATIVE PERCENT DIFFERENCE (RPD) REPORT <br /> Purgeable Aromatics In Soil <br /> MODIFIED EPA METHOD 8020 <br /> Date of Analysis 10/16/90 Client ID PC-1 <br /> Sample Used CO 10469-02 Units mg/Kg <br /> Sample Concentratio MS MS, % MSD MSD, % <br /> Analyte Result n Added Result Recovery Result Recovery <br /> Benzene NO 2 86 254 89 2 48 87 <br /> Toluene NO 286 251 88 245 86 <br /> Ethyibenzene ND 286 251 88 247 86 <br /> Xylene (total) NO 258 743 87 727 85 <br /> i <br /> Acceptability Limits' <br /> Analyte RPD, % Maximum RPD, % % Recovery <br /> Benzene 2 30 50 - 112 <br /> Toluene 2 30 50 - 108 <br /> Ethylbenzene 2 30 50 - 113 <br /> Xylene (total) 2 30 50 - 114 <br /> <# = Not Detected at the indicated detection lirnrt <br /> 1 = Acceptability limits are derived from the 99%confidence interval of all samples during the pre- <br /> vious quarter <br />. GTEL Concord CA Page 6 of 5 <br /> 0.710348 DOG <br /> iGTEL <br /> E N V I R O M N e V T A L <br /> ® LASOgA TORIes INC <br />