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Aa <br /> Project Number: SFB-175-0204.72 <br /> Consultant Project Number: 203-175-3289 <br /> Contract Number: N46CWCO244-9-X <br /> Facility Number: 9-0342 <br /> Work Order Number: D002237 <br /> Report Issue Date: February 20, 1990 <br /> Table 4 <br /> SURROGATE COMPOUND RECOVERY <br /> Naphthalene <br /> Purgeeble Aromatics and Total Petroleum Hydrocarbons <br /> as Gasoline in Soil <br /> EPA Method 8020/8015 <br /> Acceptability Limitsl: 60 - 130 % <br /> Expected Result, Surrogate Result, Surrogate Recov- <br /> GTEL No. ug/L ug/L ery, % <br /> Water Blank 200 192 96 <br /> McON Blank 200 178 89 <br /> 01 200 166 83 <br /> 02 200 198 99 <br /> 03 200 160 80 <br /> 04 200 160 80 <br /> MS 200 170 85 <br /> MSD 200 222 111 <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 /> p002237.DOC <br /> Y GTE L <br /> E N V I R O N M E N T A L <br /> LABORATORIES. INC. <br />