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s <br /> Project Number: SFO-175.0204.72 <br /> Consultant Project Number: 203-175-32ciq <br /> Contract Number: N4&VCQ244.9-X <br /> Facility Nwber: 9.0342 <br /> Mork Order Number: D003117 <br /> Report lasue Date: March 16, 1490 <br /> Table 4 <br /> SURROGATE COMPOUND RECOVERY <br /> Naphthalene <br /> Purgeable Aroc:atics and Total Petrolelaa Hydrocarbons <br /> as Gasoline in Soil <br /> EPA Method 8020/8015 <br /> Acceptability Limitsl; 60 - 130 X <br /> GTEL No. Expected Result, Surrogate Result, Surrogate Recov- <br /> ug/L ug/L ery, % <br /> Vater Blank 200 260 130 <br /> McOH Blank 200 200 100 <br /> 01 200 252 126 i <br /> 02 203 256 128 <br /> 03 <br /> 200 316 158' <br /> 04 <br /> 200 738 69 <br /> 05 200 248 124 <br /> 06 _ 200 232 116 <br /> 07 200 248 124 <br /> 200 24808 <br /> 124 <br /> MS 200 216 108 <br /> ASD 20D 282 141• <br /> MS = Matrix Spike <br /> MSD ■ Matrix Spike Duplicate <br /> 1ITAccePteu.l+ty limits are derived from the 99% confidence interval <br /> of all samples during the previOUS quarter. <br /> i " = High surr090te recovery due to Coelution <br /> i <br /> .. --71 <br /> L� GTEL Concard, CA Page 6 of 7 <br /> D003117.ODC <br /> GTE C <br /> ENVIRONMENTAL - - <br /> 1� LABORATORIES. INC _- - <br />