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l Project Number: SFE-175-0204.72 <br /> ' Consultant Prolect Number: 16000250-044 <br /> Contract Number: N46CWCO244.9.X <br /> a Facility Number: 9.61s5 <br /> t Work Order Number: C00g&m7 <br /> L Report Issue Date: September 20.1990 <br /> f Table 5 <br /> MATRIX SPIKE(MS)AND MATRIX SPIKE DUPLICATE(MSD) RECOVERY <br /> (:2 AND RELATIVE PERCENT DIFFERENCE(RPD)REPORT <br /> Purgeable Aromatics and Total Petroleum Hydrocarbons <br /> as Gasoline in Soil <br /> r,a EPA Method 8020/8018 <br /> Date of Analysis: 09/17/90 <br /> Sample Used: C009371-01 Units: mg/Kg <br /> Sample Concentration MS, % MSD MSD, % <br /> Analyte Result Added MS Result Recovery Result Recovery <br /> Benzene ND 2.86 2.27 79 2.34 82 <br /> Toluene NO 2.86 2.07 72 2.13 74 <br /> Ethyibenzene ND 2.86 2.11 74 2.17 76 <br /> n 1=„ <br /> Xylene(total) NO 8.58 . 5_38 74 6.54 75 <br /> 1..: <br /> Acceptability Umits' <br /> Analyte RPD,% Maximum RPD,% %Recovery <br /> Benzene 4 30 50-112 <br /> w <br /> Toluene 3 30 50-108 <br /> Ethylbenzene 3 30 50-113 <br /> i" 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 tae <br /> previous rijarter. <br /> k <br /> is <br /> 1 . <br /> t <br /> GTEL Concord,CA Page 7 of 7 <br /> 1 C009387.DCC <br /> GTEL <br /> - 1 - - EN V I ROHM FNfAI <br /> LAaogAro RIFs. mc- <br />