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. Project Number SF&175.0204 72 <br /> Consultant Project Number 16000-250-044 <br /> Contract Number N46CWCO244.9.X <br /> Facility Number Not Given <br /> Work Order Number 0008790 <br /> Report Issue Date September 5,1990 <br /> Table 4 <br /> SURROGATE COMPOUND RECOVERY <br /> Naphthalene <br /> Purgeable Aromatics and Total Petroleum Hydrocarbons <br /> as Gasoline In Soli <br /> EPA Method 8020/8015 <br /> Acceptability Llmitsl 60 -130 % <br /> Expected Result, Surrogate Result, Surrogate <br /> GTEL No ug/L ug/L Recovery, % <br /> Water Blank 200 231 116 <br /> McOH Blank 200 189 95 <br /> 01 200 181 91 <br /> 02 200 211 106 <br /> 03 200 171 86 <br /> MS 200 190 95 <br /> MSD 200 173 86 7711 <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 />. G T EL Concord,CA Page 6 of 7 <br /> COM790 DOC GTEL <br /> r,VIRON%IE� r <br /> IA804ATQ;?I9S "4C <br />