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Sequoia <br /> 819 Sutker Ave Ste 8 <br /> Sacramento,CA 95834 <br /> Analytical (916)921-9600 <br /> FAX(916)921-0100 <br /> ettler-Ryan-Dublin Project Former Unocal 5098,Stockton,CA 5212135 <br /> 6747 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 %REC RPD <br /> Fal to Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2120173-EPA 5030B [PIT] <br /> Laboratory Control Sam le 2120173-BSl Prepared 12/11/02 Anal ed 12/12/02 <br /> Matrix Spike(2120173-MSI) Source 5212135-06 Prepared 12/11/02 Analyzed 12/12/02 <br /> Benzene 24 5 0 50 119/1 25 0 061 96 60-140 <br /> Methyl tert-butyl ether 223 2 0 25 0 ND 89 60-140 <br /> Chlorobenzene 25 1 0 50 25 0 ND <br /> 99 60-140 <br /> 1,1-Diehl oroethene 25 6 0 50 25 0 ND 102 60-140 <br /> Toluene 26 6 0 50 25 0 1 4 101 60-I40 <br /> Trichloroethene 223 0 50 25 0 ND 89 60-140 <br /> Surrogate 1 2-DC444 251 25 0 100 60-140 <br /> Surrogate Dibromofluoromethane 23 4 25 0 94 70-130 <br /> Surrogate 12-DCA-d4 251 25 0 100 70-130 <br /> Surrogate Toluene-d8 26 9 250 108 70-130 <br /> larogate 4-BFB 273 250 109 70-130 <br /> _Matnx Spike Dup(212_0173-MSDI) Source 5212135-06 Prepared 12/11/02 Analyzed 12/12/02 <br /> Benzene 242 0 50 119/1 25 0 061 94 60-140 1 25 <br /> Methyl tert-butyl ether 22 4 2 0 25 0 ND 90 60-140 0 4 25 <br /> Chlorobenzene 24 7 0 50 25 0 ND 97 60-140 2 25 <br /> 1,1-Dichloroethene 245 0 50 '= 25 0 ND 98 60-140 4 25 <br /> Toluene 26 I 0 50 25 0 14 99 60-140 2 25 <br /> Trichloroethene 221 0 50 25 0 ND 88 60-140 0 9 25 <br /> Surrogate 12-DCA-d4 246 25 0 98 60-140 <br /> Surrogate Dibromofluoromethane 23 6 25 0 94 70-130 <br /> Surrogate 12-DCA-d4 246 250 98 70-130 <br /> Surrogate Toluene-d8 26 7 2S 0 107 70-130 <br /> Surrogate 4-BFB 270 25 0 108 70-130 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> . of custody document Unless otherwise stated results are reported on a u et weight <br /> basis This analytical report must be reproduced in its entirety <br /> 93 of 102 <br />