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Y� Iy <br /> 819 Stnker Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)921-96M <br /> Analytical FAX(916)921-0100 <br /> www sequomlabs com <br /> SECOR International-Rancho Cordova P-Jeet ARCO 4493,Stockton,CA <br /> 3017 Kilgore Road,Suite 100 Protect Number 4493,Stockton,CA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 04/10/02 16 29 <br /> Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> Sequoia Analytical-Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2030252-EPA 5030B(PIT] <br /> ECS_(2030252-BS1) Prepared&Analyzed 03/20/02 <br /> Benzene 226 0 50 UNI 25 0 904 70-130 <br /> Methyl tert-butyl ether 21 0 0 50 " 25 0 840 60-140 <br /> Chlorobenzene 245 0 50 25 0 98 0 70-130 <br /> 1,1-Dichloroethene 22 8 0 50 250 912 70-130 <br /> Toluene 24 3 0 50 25 0 97 2 70-130 <br /> Tnchloroethene 22 8 0 50 25 0 91 2 70-130 <br /> Surrogate 12-DCA-d4 190 250 760 60-140 <br /> Surrogate Dibroniofluoromethane 21 0 25 0 840 70-130 <br /> Surrogate 1 2-DCA-d4 190 25 0 760 70-130 <br /> Surrogate Toluene-d8 212 250 848 70-130 <br /> Surrogate 4-BFB 21 0 250 840 70-130 <br /> Matrix Spike(2030252-MSI) Source 5243267-06 Prepared&Analyzed 03/20/02 <br /> °Zene 24 3 0 50 UFA 250 ND 96 6 60-140 <br /> �1C4ethyl tert-butyl ether 225 0 50 250 066 87 4 60-140 <br /> Chlorobenzene 264 0 50 25 0 ND 106 60-140 <br /> 1,i-Dtchloroethene 24 7 0 50 25 0 ND 98 8 60-140 <br /> Toluene 260 0 50 " 25 0 ND 103 60-140 <br /> Trichloroethene 24 3 0 50 25 0 ND 964 60-140 <br /> Surrogate 12-DCA-d4 191 25 0 76 4 60-140 <br /> Surrogate Dtbromofluoromethane 21 4 25 0 856 70-130 <br /> Surrogate 1,2-DCA-d4 191 25 0 76 4 70-130 <br /> Surrogate Toluene-d8 208 250 83 2 70-130 <br /> Surrogate 4-BFB 22 2 250 888 70-130 <br /> _Matrix Spike Dup(2030252-MSDI) - Source S20_3267-06 Prepared&Analyzed 03/20/02 <br /> Benzene 23 8 0 50 ugA 25 0 ND 946 60-140 208 25 <br /> Methyl tert-butyl ether 247 0 50 " 25 0 0 66 962 60-140 932 25 <br /> Chlorobenzene 259 0 50 25 0 ND 104 60-140 1 91 25 <br /> 1,1-Dichloroethene 241 0 50 25 0 ND 964 60-140 246 25 <br /> Toluene 25 6 0 50 250 ND 102 60-140 1 55 25 <br /> Trichloroethene 239 0 50 25 0 ND 948 60-140 1 66 25 <br /> Surrogate 12-DCA-d4 198 15 0 792 60-140 <br /> Surrogate Dibromofluoromethane 22 0 250 880 70-130 <br /> Surrogate 1,2-DCA-d4 198 " 250 792 70-130 <br /> Surrogate Toluene-d8 208 250 83 2 70-130 <br /> Surrogate 4-BFB 209 25 0 $36 70-130 <br /> WUOla Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document This analytical report must be reproduced in its entirety <br /> Page Page 23 of 27 <br />