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. Project Number SFB-175-0204 72 <br /> Consultant Project Number 16000-250-044 <br /> Contract Number N46CWCO244-9-X <br /> Facility Number 9-6155 <br /> Work Order Number 0010176 <br /> Report Issue Date October 10, 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 200 254 127 <br /> McOH Blank 200 234 117 <br /> 01 200 245 123 <br /> 02 200 233 117 <br /> 03 200 223 112 <br /> 04 200 214 107 <br /> 0$ 1 200 257 128 <br /> 06 200 249 124 <br /> MS 200 121 60 <br /> MSD 200 166 83 <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 /> GTEL Concord CA Page 6 of 7 <br /> 0010176 DOC GTEL <br /> fNY1 ROY ti1EYTA4 <br /> ® ;ABORArOV ES INC <br />