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• Protect Number SFB-175-0204 72 <br /> Consultant Project Number 1600-250-044 <br /> Contract Number N46CWCO244-9-X <br /> Facility Number 9.6155 <br /> Work Order Number 0009524 <br /> Report Issue Date September 27 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 Llrnitsl 60- 130 % <br /> Expected Result, Surrogate Result, Surrogate <br /> GTEL No ug/L ug/L Recovery, % <br /> Water Blank 200 164 82 <br /> McOH Blank 200 148 74 <br /> 01 200 165 83 <br /> 02 200 160 80 <br /> 03 200 139 70 <br />• 04 200 196 98 <br /> 05 200 144 73 <br /> MS 200 149 75 <br /> MSD 200 158 79 <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 /> CG05524 DOC GTE L <br /> E N V,R O N M E NTA L <br /> ® LABORATORIES 'NC <br />