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Pro ect Number SFB-175-0204 72 <br /> Consultant Project Number 16000-250-044 <br /> Contract Number N46CWCO244 9-X <br /> Faculty Number 9-6155 <br /> Work Order Number 0010846 <br /> Report Issue Date November 8, 1990 <br /> Table 4 <br /> SURROGATE COMPOUND RECOVERY <br /> Naphthalene <br /> Purgeable Aromatics and Total Petroleum Hydrocarbons <br /> as Gasoline In Soil <br /> EPA Method 8020/8015 <br /> Acceptability Limits' 60 - 130 % <br /> Expected Result, Surrogate Result, Surrogate <br /> GTEL No ug/L ug/L Recovery, % <br /> Water Blank 200 134 67 <br /> McOH Blank 200 242 121 <br /> 01 200 246 123 <br /> MS 200 201 100 <br /> MSD 200 251 125 <br />• MS = Matrix Spike <br /> MSD = Matrix Spike Duplicate <br /> 1 = Acceptability limits are derived from the 99% confidence interval <br /> of all samples during the previous quarter <br />. GT6L Concord CA Page 6 of 7 <br /> COIC846 DOC GTEL <br /> IN VI0ON IA E"I TA L <br /> ® l.ASOQATOQIES INC <br />