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Project Number: SF&175-0204.72 <br /> Consultant Project Number: 203-175-3291 <br /> Contract Number. N46CW00244-9-X <br /> Facility Number: 94)557 <br /> Work Order Number: D005371 <br /> Report Issue Date: May 16, 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 Soil <br /> EPA Method 8020/8015 <br /> Date of Analysis: 05/11/90 Client ID: WO-1 <br /> i <br /> Sample Used: D005371-01 Units: mg/Kg <br /> Sample Concentratio MS, % MSD, % <br /> Analyte Result n Added MS Result Recovery MSD Recovery <br /> Result <br /> Benzene <0.005 2.86 2.79 98 2.77 97 <br /> Toluene <0.005 2.86 2.76 97 2.73 1 96 <br /> Ethyibenzene <0.005 2.86 2.71 95 2.74 96 <br /> xylene total <0.015 8.58 8.12 95 8.11 95 <br /> Acceptability Limitsl <br /> Analyte RPD, % Maximum RPD, % % Recovery <br /> Benzene 1 30 50 - 112 <br /> Toluene 1 30 50 - 108 <br /> Ethylbenzene 1 30 50 - 113 <br /> Xylene (total 0 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 /> GTEL Concord,CA Page 8 of 8 <br /> ' D00537].DOC <br /> NGTELR <br /> LABORATORIES, INC. <br />