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Project Number: SF&175-0204.72 <br /> Censuttant Protect Number, 1600.250-044 <br /> Contract Number. N48CWCO244.9-X <br /> Facility Number: 9-6155 <br /> Work Order Number: 0009524 <br /> L- Repast 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 Limitst: 60-130 % <br /> Expected Result. Surrogate Result, Surrogate <br /> GTEL No. ug/L ua/L Recovery,% <br /> c' t Water Blank 200 164 82 <br /> McOH Blank 200 148 74 <br /> f-a <br /> 01 200 165 83 <br /> 02 200 160 80 <br /> 03 200 139 70 <br /> a.1 ,>, 04 200 196 98 <br /> Og 200 144 73 <br /> MS 200 149 75 <br /> % f g MSD 200 158 79 <br /> MS = Matrix Spike <br /> MSD = Matrix Spike Duplicate <br /> 1 = Acceptability limits are derived from the 99°'o confidence interval <br /> of all samples during the previous quarter. <br /> 1 <br /> bas <br /> Page6of7 <br /> GTEL Concord.CA <br /> CC09524.00C <br /> 6 v 1 x o rl M E N I A L - - - - <br /> ' 4EM LAeoaaroxrEs:'rrrc _ <br /> 1 <br /> tLf <br />