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Project Number SFB-175-0204 72 <br /> Consultant Protect Number 16000-250-044 <br /> Contract Number N46CWCO244-9-X <br /> Facility Number 9-&155 <br /> Work Order Number 0010620 <br /> Report Issue Date October 26, 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 Sots <br /> MODIFIED EPA METHOD 8020 <br /> Date of Analysts 10/23/90 Client 1D SPC <br /> Sample Used C010578-09 Units mg/Kg <br /> Sample Concentratia MS MS, % MSD MSD, % <br /> Analyte Result n Added Result Recovery Result Recovery <br /> Benzene <0 005 286 220 77 219 77 <br /> Toluene <0 005 286 227 79 227 79 <br /> Ethylbenzene <0 005 286 231 81 J 235 82 <br /> Xylene (total) <0015 858 694 81 7 06 82 <br /> Acceptability Limits' <br /> Analyte RPD, % Maximum RPD, % % Recovery <br /> Benzene 0 30 50 - 112 <br /> Toluene 0 30 50 - 108 <br /> Ethylbenzene 1 30 50- 113 <br /> Xylene (total) 1 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 pre- <br /> vious quarter <br /> I <br /> I <br /> i <br /> i <br /> I <br /> I <br /> I <br /> i <br /> GTEL Concord,CA Page 7 of 7 <br /> =062000C DOC " G T E L <br /> [N V I R O V M E 4-A L <br /> ® LA90QAr0RIf3 INC <br /> - I <br />