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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 9-6155 <br /> Work Order Number 0010838 <br /> Report Issue Data November 5 1990 <br /> Table 4 <br /> SURROGATE COMPOUND RECOVERY <br /> Naphthalene <br /> Total Petroleum Hydrocarbons <br /> as Gasoline in Sal <br /> EPA Method 8015 <br /> Acceptability Limits' 60- 130 % <br /> Expected Resuit. Surrogate Result, Surrogate <br /> GTEL No ug/L ug/L Recovery, % <br /> L <br /> nk 200 242 121 <br /> nk 200 233 116 <br /> 200 175 88 <br /> 200 197 99 <br /> 200 120 60 <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 /> 0010838 Doc GTEL <br /> S N V!4 O Y M E N T A L <br /> ® LABORATORIES INC <br />