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619 Sinker Ave Ste 8 <br /> Sequoia Sacramento)9>��� <br /> Analytical FAX(916)921-0100 <br /> www sequoudabs corn <br /> ' Geological Technics,Inc Project Cardoza 5412258 <br /> 1101 7th Street Project Number 662 2 ]reported <br /> ' Modesto CA,95354 Project Manager Joseph Angulo 12/23/04 12 28 <br /> GasofinelBTEX10xygenates by EPA method 8260B-Quahty Control <br /> 1 Sequoia Analytical- Sacramento <br /> Reportmg Spice Source "/0REC RPD <br /> Analyte Result Lanut huts Level Result %REC I.imlts RPD limit Notes <br /> ' Batch 4120262-EPA 5030B[PIT]I EPA 8260B <br /> Laboratory Control Sample(4120262-BSI) Prepared&Analyzed 12/20/04 <br /> Methyl tent-butyl ether 204 050 ug/l 200 102 60-140 <br /> Benzene 184 050 11 200 92 70-130 <br /> Toluene 212 050 200 106 70-130 <br /> Surrogate 11-DCA-d4 930 100 93 60-140 <br /> ' Surrogate Toluene-d8 103 H 100 103 60-140 <br /> Surrogate 4-BF8 100 100 100 60-140 <br /> Laboratory Control Sample(4.1.20262-BS2) Prepared&Analyzed 12/20/04 <br /> ' Methyl ter#-butyl ether 409 050 USA 432 95 60-140 <br /> Benzene 237 050 268 88 70 130 <br /> Toluene 176 050 152 116 70-130 <br /> Gasoline Mange Organics(C4-Cl2) 2350 50 2200 107 70-130 <br /> Wrrogate 12-DCA-d4 9 70 " 10 0 97 60-140 <br /> Surrogate Toluene-d8 109 160 109 60-140 <br /> Surrogate 4-BFB 109 100 109 60-140 <br /> ' Laboratory Control Sample Dup(4120262-BSDI) Prepared&Analyzed 12/21/04 <br /> Methyl tent butyl ether 181 050 ug/1 200 90 60-140 12 25 <br /> Benzene 185 050 200 92 70-130 05 25 <br /> Toluene 18 6 050 200 93 70-130 13 25 <br /> Surrogate 12-DCA-d4 999 10 0 100 60 140 <br /> Surrogate Toluene-d8 897 100 90 60-140 <br /> Surrogate 4-BFB 969 100 97 60-140 <br /> ' Laboratory Control Sample Dup(4120262-BSD2) Prepared&Analyzed 12/21/04 <br /> Methyl tert-butyl ether 426 050 ug/l 43 2 99 60-140 4 25 <br /> Benzene 25 8 050 268 96 70-130 8 25 <br /> ' Toluene 167 0 50 11 152 110 70-130 5 25 <br /> Gasoline Range Organics(C4-C12) 2310 50 2200 105 70-130 2 25 <br /> Surrogate 12-DCA-d4 937 100 94 60-140 <br /> Surrogate Toluene-d8 960 r 100 96 60-140 <br /> Surrogate 4-BFB 105 100 105 60-140 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated,results are reported on a wet weight basis <br /> This analytical report must he reproduced in its entirety <br /> Page 11 of 13 <br />