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Proiect Number: SFI3-175.0204.72 <br /> Consultant Project Number: 203-175.3291 <br /> Contract Number: N46CW00244-9-X <br /> Facility Number: 94)557 <br /> Work Order Number: D004127 <br /> Report Issue Date: April 10,1990 <br /> Table 4 <br /> SURROGATE COMPOUND RECOVERY <br /> Naphthalene <br /> Purgeable Aromatics in Soil <br /> MODIFIED EPA METHOD 8020 <br /> Acceptability Limitsl: 60 - 130 % <br /> Expected Result, Surrogate Result, Surrogate <br /> GTEL No. ug/L ug/L Recovery, % <br /> Blank 200 157 78 <br /> 01 200 230 115 <br /> 02 200 193 97 <br /> 03 200 176 88 <br /> MS 200 188 94. <br /> MSD 1 200 1 201 100 <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 /> i <br /> GTEL Concord,CA Page 5 of 6 <br /> D004127.DOC . GTELR <br /> LA60RAt0 <br /> RI ES. iNC <br />