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Project Number SFS-175-0204 72 <br /> Consultant Project Number 16000-250-044 <br /> Contract Number N46CWCO244-9-X <br /> Facility Number 9-6155 <br /> Work Order Number 00098387 <br /> Report Issue Date September 20, 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 Limdsl 60 - 130 % <br /> Expected Result, Surrogate Result, Surrogate <br /> GTEL No ug/L ug/L Recovery, % <br /> Water Blank 200 188 99 <br /> McOH Blank 200 164 82 <br /> 01 200 213 106 <br /> 02 200 225 112 <br /> 03 200 208 104 <br /> 04 200 193 96 <br /> 05 200 128 89 <br /> 06 200 177 88 <br /> MS 200 131 66 <br /> MSD 200 139 1 69 <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 /> 0009387 DCC GTE L <br /> ENV I go N M E V TA <br /> ® LABORATORIES INC <br />