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. Project Number SF&175.020472 <br /> Consultant Project Number 16000-250-044 <br /> Contract Number N46CWCO244-9-X <br /> Facility Number 9-6155 <br /> Work Order Number 0008737 <br /> Report Issue Date August 31, 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 Llmitsl 60- 130 % <br /> Expected Result, Surrogate Result, Surrogate <br /> GTEL No ug/L ug/L Recovery, % <br /> Water Blank 200 166 83 <br /> McOH Blank 200 211 106 <br /> 01 200 245 123 <br /> 02 200 255 128 <br /> 03 200 250 125 <br /> MS 200 189 94 <br /> MSD 200 199 99 <br /> MS = Matrix Spike <br /> MSD = Matrix SpIke Duplicate <br /> 1 = Acceptat�Illty limits are derived from the 99% confidence Interval <br /> of all samples during the previous quarter <br /> GTFL Concord CA Page 6 of 7 <br /> C008737 DCC GTE L <br /> E-N VI RONM E V TAI <br /> ® .ABORATORIES INC <br />