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Proiect Number: SF&175-0204.72 <br /> Consultant Project Number: 203^175-3291 <br /> Contract Number: N46CWCO244-9-X <br /> Facility Number: 9-0557 <br /> Work Order Number: D005371 <br /> Report Issue Date: May 16, 19W <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 Umitsl: 60- 130 % <br /> Expected Result, Surrogate Result, Surrogate <br /> GTEL No. ug/L ug/L Recovery, % <br /> Water Blank 200 222 111 <br /> McOH Blank 200 206 103 <br /> 01 200 182 91 <br /> 02 200 176 88 <br /> 03 200 198 99 <br /> 04 200 170 85 <br /> 05 200 188 94 <br /> 06 200 240 120 <br /> 07 200 188 94 <br /> 08 200 224 112 <br /> 09 200 248 124 <br /> 10 200 224 112 <br /> MS 200 164 82 <br /> MSD 200 200 100 <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 /> GTEL Concord,CA Page 7 of 8 <br /> D005371.DOC <br /> GTELENVIRONMENTAL <br /> LABORATORIES. INC. <br />