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Project Number: SFS175-0204.72 <br /> Consultant Protect Number: 203-175-3241 <br /> Contract Number: N46CWCO244-9-X <br /> Facility Number: 9-0557 <br /> Work Order Number: D005259 <br /> Report Issue Date: May 21,1990 <br /> Table 4 <br /> SURROGATE COMPOUND RECOVERY <br /> Naphthalene <br /> Purgeabie 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 200 195 98 <br /> McOH Blank 200 178 89 <br /> 01 200 256 128 <br /> 02 200 228 114 <br /> MS 200 176 88 <br /> MSD 200 146 73 <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 6 of 7 <br /> D005259.DOC <br /> NGTEL <br /> ENVIRONOENTAL <br /> LA60RA10RIfS. INC. <br />