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Nov 9 00 <br /> Number SFB-175-0204 72 <br /> ConsuKant P�ed�Number 30-189 <br /> . FaoifRy Number 96465 Stockton X <br /> Work Order Number 0010839 <br /> Report ksue Date November 7, 1990 <br /> Table 6 <br /> REAGENT (WSD) <br /> RECOVERY AND RELATIVE PERCENT DIFFERENCE (RPD)REPORT <br /> Purgeable Aromatics and Total Petroleum Hydrocarbons <br /> as Gasoline in Water <br /> EPA Method 6020/8015 <br /> Date of Analysis 11/04/90 Units ug/L <br /> Concentration WS.% WSD, % <br /> Analyte Added WS Result Recovery WSD Result Recovery <br /> Benzene 25 261 104 265 106 <br /> Toluene 25 255 102 260 iO4 <br /> Ethylbenzene 25 262 1 105 26 8 107 <br /> Xylene(total) 75 791 105 807 108 <br /> Acceptability Limits' <br /> Analyte RPD, % Maximum RPD,% % Recovery <br /> Benzene 2 30 84- 128 <br /> Toluene 2 30 83 - 122 <br /> Ethylbenzene 2 30 82- 120 <br /> X ene(total) 3 30 86- 123 <br /> 1 = Acceptability limits are derived from the 99%confidence interval of all samples during the <br /> previous quarter <br /> • GTEE concord,CA Page 9 Of 9 <br /> 0010M DOC GTEL <br /> 4A602ATOWIS MC- <br />