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8 19 Strtker Ave Ste B <br /> Sequoia Sacramento CA 95834 <br /> Analytical <br /> (916)921-9690 <br /> �f'�n a ly t i.iC a 1 FAX(91 b)92 t-0100 <br /> www sequoialabs com <br /> Geological Technics Inc Project Marcl Property 5408474 <br /> 1101 7th Street Project Number 3RD QTR 2004 Reported <br /> ' Modesto CA,95354 Project Manager Joseph Angulo 09/03/04 17 30 <br /> Gasofi nelBTEXIOxygenates 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 4080389-EPA 5030E[PIT] <br /> Laboratory Control Sample(4080389-BS3) Prepared 08/30/04 Analyzed 08/31/04 <br /> Methyl tert-butyl ether 945 050 ug/l 864 109 60-140 <br /> ' Benzene 5 67 050 536 106 70-130 <br /> Toluene 32 6 050 303 108 70-130 <br /> Gasoline Range Organics(C4-C12) 355 50 440 81 70-130 <br /> ' Surrogate Toluene-d8 106 100 106 60-140 <br /> Surrogate 4-BFB 937 100 94 60-140 <br /> Surrogate 1 2-DC-4-d4 832 100 83 60-140 <br /> ' Matrix Spike 4080389-MSI Source 5408399-08 Prepared 08/26/04 Analyzed 08/27/04 <br /> Methyl tert-butyl ether 106 050 ugll 8 64 2 7 91 60-140 <br /> Benzene 544 050 5 36 ND 101 70-130 <br /> Toluene 334 050 303 ND 110 70-130 <br /> 111111kissolme Range Organics(C4-C12) 391 50 440 ND 89 60-140 <br /> Surrogate To7uene-d8 _ 106 100 106 60-140 <br /> Surrogate 4-BFB 7 77 100 78 60-140 <br /> Surrogate 1,2-DCA-d4 11 8 " 100 118 60-140 <br /> Matrix Spike Dup(4080389-MSDI) Source*5408399-08 Prepared 08/26/04 Analyzed 08/28/04 _ <br /> Methyl tert-butyl ether 997 050 ug/l 8 64 2 7 84 60-140 6 25 <br /> ' Benzene 482 050 " 5 36 ND 90 70-130 12 25 <br /> Toluene 280 050 303 ND 92 70-130 18 25 <br /> Gasoline Range Organics(C4-C12) 327 50 440 ND 74 60-140 18 25 <br />' Surrogate Toluene-d8 941 n 100 94 60-140 <br /> Surrogate 4-BFB 784 IO 0 78 60-140 <br /> Surrogate 1,2-DCA-d4 11 8 100 118 60-140 <br /> Batch 4080482-EPA 5030B PIT <br />' Blank(4080482-BLKI) Prepared 8c AnalLwd 08/31/04 _ <br /> Ethanol T ND 50 119/1 <br /> Tert-butyl alcohol ND 5 0 " <br />' Methyl tert-butyl ether ND 050 " <br /> Di-isopropyl ether ND 050 " <br /> Ethyl Cert-butyl ether ND 050 " <br />' Tert-amyl methyl ether ND 0 50 <br /> 1,2-Dichloroethane ND 050 " <br /> 1,2-Dibromoethane(EDB) ND 050 <br />' <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 wet weight <br /> haws This analytical report must be reproduced in its entirety <br /> Page 12 of 16 <br />