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819 Stnker Ave Ste 8 <br /> Sequoia' SacrameC95834(9191 6)922 -0100 <br /> FAX(916)921 1-0]04 <br /> Analytical www aequo,elabs com <br /> Geological Technics,Inc Project Montas Bros S511619 <br />' 1101 7th Street Project Number 724 2 Reported <br /> Modesto CA,95354 Project Manager Geological Teohritcs,Inc 12/21/05 16 02 <br /> Purgeable Hydrocarbons and BTEX by EPA 8015B/8021B-Quality Control _ <br />' Sequoia Analytical-Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit lints Level Result %REC Ltituts RPD Limit Notes <br /> Batch 5120066-EPA 5030E / /EPA 8015B/8021B <br /> Blank(5120066-BLKI) Prepared&Analyzed 12/06/05 <br />' Gasoline Mange Organics(C4-C12) ND 50 ug/] <br /> Benzene ND 050 <br /> Toluene ND 050 " <br />' Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 20 " <br /> Surrogate 4-BFB(FID) 105 100 105 60-140 <br />' Surrogate a a a-TFT(PID) 102 100 102 60-140 <br /> Laboratory Control Sample(5120066-BS1) Prepared&Analyzed 12/06/05 <br /> Benzene 105 0 50 ug/1 100 105 70-130 <br /> Edopluene 107 050 100 107 70-130 <br /> thylbenzene 107 0 50 10 0 107 70-130 <br /> Xylenes(total) 326 050 300 109 70-130 <br /> 1 Methyl tert-butyl ether I l 0 2 0 100 110 70-130 <br /> Surrogate 4-BF9(FID) 9 83 100 98 60-140 <br /> Surrogate a a a-TFT(PID) 9 97 100 100 60-140 <br />' Matrix Spike(5120066-MS1) Source 5511616-01 Prepared&Analyzed 12/06/05 <br /> Benzene 113 0 50 ug/1 too 0 145 112 60-140 <br /> Toluene 115 050 100 0 283 112 60-140 <br /> Ethylbenzene 114 0 50 100 0 167 112 60-140 <br />' Xylenes(total) 35 0 050 300 0 493 115 60-140 <br /> Methyl tert-butyl ether 137 2 0 100 0 420 133 60-140 <br /> Surrogate 4-BFB(FID) 108 100 108 60-140 <br />' Surrogate a a,a-TFT(PID) 109 100 109 60-140 <br /> Matrix S tke Dup(5120066-MSDI) Source 5511616-01 Prepared&Analyzed 12/06/05 <br /> Benzene 11 1 050 ug/1 100 0 145 110 60-140 2 25 <br />' Toluene 113 050 10 0 0 283 110 60-140 2 25 <br /> Ethylbenzene 112 050 100 0 167 110 60-140 2 25 <br /> Xylenes(total) 343 050 300 0 493 113 60-140 2 25 <br /> Methyl tent-butyl ether 132 2 0 100 0 420 128 60-140 4 25 <br /> Surrogate 4-BFB(FID) 114 100 114 60-140 <br /> Surrogate a a a-TFT(PID) 104 100 104 60-140 <br />' Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 12 of 15 <br /> 1 <br />