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Project Number SFB-175-0204 72 <br /> Consultant Project Number 16000-250044 <br /> Contract Number N46CWCO244-9-X <br /> Facility Number 9-6115 <br /> Work Order Number 0010348 <br /> Report Issue Date October 18, 1990 <br /> Table 4 <br /> SURROGATE COMPOUND RECOVERY <br /> Naphthalene <br /> Purgeable Aromatics In Sod <br /> MODIFIED EPA METHOD 8020 <br /> Acceptability Limits' 60- 130 % <br /> Expected Result, Surrogate Result, Surrogate <br /> GTEL No ug/L ug/L Recovery, % <br /> Blank 200 179 90 <br /> 01 200 169 85 <br /> 02 200 167 84 <br /> 03 200 170 85 <br /> 04 200 169 85 <br /> 05 200 165 83 <br /> MS 200 222 111 Ill <br /> MSO 200 217 109 <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 5 of 6 <br /> ca 103Q Doc GTEL <br /> -E N Y I R O N M E Y T A <br /> ® LAaORATOAIES INC <br />