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Sequoia <br /> 819 Striker Ave Ste 8 , <br /> Sacramento,CA 95834 <br /> Analytical _ (916) 921-9600 <br /> T FAX(916)921-010 <br /> Y <br /> Gettler-Ryan-Dublin Project Former Unocal 5098,Stockton,CA S212135 <br /> 6747 Sierra Court,Ste 7 Project Number NIA Reported ' <br /> Dublin CA 94568 Project Manager Deanna L Harding 12/27/02 14 14 <br /> Total Purgeable Hydrocarbons by DHS LUFT - Quality Control <br /> Sequoia Analytical-Sacramento <br /> - Reporting Spike Source %REC RPD ' <br /> 1AnalXte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2120198-BPA 5030B T/'1') <br /> Blank(2120198-BLK1) Prepared&Analyzed. 12/11/02 <br /> Purgeable Hydrocarbons ND - 50 49/1 <br /> Surrogate a a a-Tris luorotoluene 905 100 90 60-140 , <br /> Blank(2120198-BLK2) _ Prepared&Analyzed„12112/02 <br /> Purgeable Hydrocarbons ND 50 ug/1 ' <br /> Surrogate a a a-Trtfluorotoluene 887 100 89 60-140 <br /> Blank(2120198-BLK3) ___ ry . Prepared&Analyzed 12/13/02 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Surrogate a a a-Trifluorotoluene 105 100 105 60-140 <br /> Blank(2120198-BLK4) Prepared&Analyzed 12/16/02 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Surrogate a a a-Trtguorotoluene 921 100 92 60-140 <br /> Blank 2120198-BLK5Prepared&Analyzed 12/17/02 _ <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Surrogate a a a-TriJluorotoluene 870 100 87 60-140 1 <br /> Laboratory Control Sample 2120198-BS1 Prepared&Analyzed 12/11/02 <br /> - Purgeable Hydrocarbons - -247 50 ug/1 250 - 99 70-130'- <br /> Surrogate <br /> 0-130`-Surrogate a a a-TriJluorotoluene 124 100 124 60-140 <br /> Laboratory Control Sample(2120198-BS2) Prepared&Analyzed 12/12/02 <br /> Purgeable Hydrocarbons 227 50 ug/l 250 91 70-130 <br /> - - — Surrogate a a a-TriJluorotoluene - - - --12 0-- - - -- - 100- - - 120 60-140- - - - <br /> Sequoia Analytical-Sacramento The results rn this report apply to the samples analyzed in accordance with the chain <br /> of custody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety ' <br /> 78 of 102 <br />