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"�r�� 819 Sinker Ave Ste 8 <br /> Sequoia Sacramento CA 95834 <br /> Analytical (1b)921-0100 <br /> FAX 916 921-OIOD <br />%D www sequotalabs cam <br /> Geological Technics Inc Project Marci 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 /> GasolinelBTEMOxygenates by EPA method 8260B-Quality Control <br /> Sequoia Analytical-Sacramento <br /> Reportmg Spike Source %REC RPD <br /> Analyte Result Ltmtt Units Leuel Result %REC Limits RPD LImIL Notes <br /> Batch 4080482-EPA 5030B [P/TI <br /> Blank 4080482-BLK3 Prepared 09/01/04 Analyzed 09/02/04 <br /> Ethylbenzene ND 0 50 ug/l <br />' Toluene ND 0 50 n <br /> Xylenes(total) ND 0 50 <br /> Gasoline Range Organics(C4-C12) ND 50 " <br /> Surrogate Toluene-d8 924 rF 100 91 60-140 <br /> Surrogate 4-BFB 915 100 92 60-140 <br /> Surrogate 12-DCA-d4 911 100 91 60-140 <br />' <br /> Laboratory Control Sample 4080482-BS1 Prepared&Analyzed 08/31/04 <br /> Methyl tert-butyl ether 967 050 ug/l 8 64 112 60-140 <br /> Benzene 603 050 5 36 112 70-130 <br /> Toluene 35 0 0 50 30 3 116 70-130 <br /> asoline Rouge Organics(C4-C12) 461 50 440 105 70-130 <br /> arrogate Toluene-d8 948 100 95 60-140 <br /> Surrogate 4-BFB 886 100 89 60-140 <br /> Surrogate 1,2-DCA-d4 993 100 99 60-140 - <br /> Laboratory Control Sample(4080482-BS2) Prepared&Analyzed 09/01/04 <br /> Methyl tert-butyl ether 925 0 50 ug/l 864 107 60-140 <br /> ' Benzene 550 050 536 103 70-130 <br /> Toluene 389 0 50 303 t28 70-130 <br /> Gasoline Range Organics(C4-C12) 492 50 440 112 70-130 <br /> Surrogate Toluene-d8 119 100 119 60-140 <br /> Surrogate 4-BFB 930 100 93 60-140 <br /> Surrogate 1,2-DCA-d4 813 100 82 60-140 <br /> Matrix Spike(4080482-MSI) Source 5408474-02 Prepared 09/01/04 Analyzed 09/02/04 <br /> Methyl tert-butyl ether 979 0 50 ug/1 864 ND 113 60-140 <br /> Benzene 6 01 0 50 536 ND 112 70-130 <br /> Toluene_ _ _ 369 _ 0 50 303 ND 122 70-130 _ <br /> Gasoline Range Organics(C4-C12) 345 50 440 ND 78 60-140 <br /> ' Surrogate Toluene-d8 Il 0 100 110 60-140 <br /> Surrogate 4-BFB 857 100 86 60-140 <br /> Surrogate 1 2-DCA-d4 935 100 94 60-140 <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 /> basis This analytical report must be reproduced in its entirety <br /> Page 14 of 16 <br />