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Project Number: SFB-175-0204.72 <br /> Consultant Project Number: 203-1753291 <br /> Contract Number: N46CW00244-9-X <br /> Facility Number: 94)557 <br /> Worm Order Number: D004125 <br /> Report Issue Date: April 11, 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 Limitsl: 60- 130 % <br /> Expected Result, Surrogate Result,I Surrogate <br /> GTEL No. ug/L ug/L Recovery, % <br /> McOH Blank 200 158 79 <br /> 01 200 170 85 <br /> 02 200 428 214* <br /> 03 200 384 192* <br /> 04 200 200 100 <br /> 05 200 248 124 <br /> 06 200 211 106 <br /> 07 200 205 103 <br /> 08 200 221 111 <br /> 09 200 184 92 <br /> 10 200 276 138* <br /> 11 200 280 140* <br /> 12 200 239 119 <br /> 13 200 211 106 <br /> 14 200 246 123 <br /> MS 200 1 188 94 <br /> MSD 200 201 100 <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 /> * = Surrogate recovery high due to matrix interferences. <br /> GTEi_Concord,CA Page 6 of 7 <br /> D004126-DOC <br /> GTEL R <br /> 1A60RATORIf S. INC <br />