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is <br /> Project Number: SF&175.0244,72 <br /> 1.. Consultant Project Number, 16000.242-044 <br /> Conuact Number, N46CWCO244-9-X <br /> Facility Number. 9•6155 <br /> Work Cktler Number: C009120 <br /> Fkpbrt Issue Date: September 11,1990 <br /> i <br /> f <br /> Table 5 <br /> MATRIX SPIKE(MS)AND MATRIX SPIKE DUPLICATE(MSD) RECOVERY <br /> AND RELATIVE PERCENT DIFFERENCE(RPD)REPORT <br /> Purgeabie Aromatics and Total Petroleum Hydrocarbons <br /> as Gasoline in Soil <br /> EPA Method 6020/6015 <br /> G.i <br /> Date of Analysis: 09/06/90 Client ID: 2-A B,C <br /> Sample Used: 0009120-02 Units: m K <br /> 9/ 9 <br /> Sample Concentration MS, 96 MSd, <br /> Analyte Result Added MS Result Recovery MSD Recovery <br /> Result <br /> Benzene ND 2.66 2.12 74 2.10 73 <br /> ` Toluene ND 2.86 2.13 74 2.11 74 <br /> I1 � <br /> Ethylbenzene ND 2.86 219 77 2.14 75 <br /> X ene(total) ND - 8.58 6.37 74 6.25 73 <br /> Acceptability Limits) <br /> Analyte RFD,% Maximum RPD,% %Recovery <br /> Benzene 1 30 50-112 <br /> Toluene 0 30 5D-108 <br /> Ethylben:ene 3 30 50-113 <br /> Xylene{total) 1 30 50-114 <br /> <# Not Detected at the indicated detection limit <br /> I Acceptability limits are derived from the 99%confidence interval'of all samples during the <br /> previous quarter. <br /> STEL COnccrd,CA Page 7 of 7 <br /> C009120.00C a <br /> IGTEL <br /> [NVIG ONUFNT+I - - <br /> �r •A/OPAiO41ti. INC' _ - - <br />