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Sequoia 819 Striker Ave Ste 8 <br /> Sacramento,CA 95834 <br /> Analytical (916)921-9600 <br /> FAX(916)921-0100 <br /> ettler-Ryan-DubIm Project Former Unocal 5098,Stockton,CA 5212135 <br /> 6741 Sierra Court,Ste j Project Number N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 12/27/02 14 14 <br /> Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> Sequoia Analytical-Sacramento <br /> Reporting Spike Source 0/a1tEC RPD <br /> [Analyte Result Limit Units Level Result %REC Limits RPD Litnit Notes <br /> Batch 2120133-EPA 5030B [P/TJ <br /> Laboratory Control Sample(2120133-BS1) Prepared&Anal ed 12/09/02 <br /> Benzene 33 2 0 50 ug/1 25 0 133 70-130 Q-LIM <br /> Methyl tert-butyl ether 28 1 20 25 0 112 60-140 <br /> Chlorobenzene 224 0 50 25 0 90 70-130 <br /> 1,1-Dichloroethene 299 0 50 25 0 120 70-130 <br /> Toluene 26 7 0 50 25 0 107 70-130 <br /> Trichloroethene 23 4 0 50 25 0 94 70-130 <br />' Surrogate 1,2-DCA-d4 26 7 25 0 107 60-140 <br /> Surrogate Dibromofluoromethane 266 25 0 106 70-130 <br /> Surrogate 1,2-DCA-d4 267 25 0 107 70-130 <br /> Surrogate Toluene-d8 263 15 0 105 70-130 <br /> Surrogate 4-BFB 298 250 119 70-130 <br /> oratory Control Sample(2120133-BS3) Pr aced&Analyzed 12/10/02 <br /> nzene 246 0 50 ug/l 25 0 98 70-130 <br /> Methyl tert-butyl ether 26 1 20 25 0 104 60-140 <br /> Chlorobenzene 252 0 50 25 0 101 70-130 <br /> 1,1-Dlchloroethene 25 4 0 50 25 0 102 70-130 <br /> Toluene 25 4 0 50 25 0 102 70-130 <br /> Trichloroethene 21 8 0 50 25 0 87 70-130 <br /> Surrogate 12-DCA-d4 274 250 110 60-140 <br /> Surrogate Dibromofluoromethane 256 250 102 70-130 <br />' Surrogate 1 2-DCA-d4 274 25 0 110 70-130 <br /> Surrogate Toluene-d8 271 250 108 70-130 <br /> Surrogate 4-BFB 262 250 105 70-130 <br /> Matrix Spike(2120133-MS1) Source S212135-23 Prepared&Analyzed- 12/09/02 <br /> Benzene 33 6 050 u9A 25 0 ND 134 60-140 <br /> Methyl tert-butyl ether 28 9 2 0 11 25 0 ND 116 60-140 <br /> Chlnrnhen7�pr 23 4 050 25 v" ivu 94 60-140 <br /> 1,1-Dichloroethene 31 2 050 25 0 ND 125 60-140 <br /> Toluene 27 3 050 25 0 ND 109 60-140 <br /> Trichloroethene 24 1 050 25 0 ND 96 60-140 <br /> Sequoia Analytical-Sacrarento The results in this report apply to the samples analyzed in accordance with the chain <br /> • of custody document Unless otherwise stared results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> 89 of 102 <br />