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^-Y ]9 Straker Ave Ste 8 <br /> Sequoia Sacramento CA 95834 <br /> Analytical (916)92'-0'000 <br /> FAX 916 9 <br /> www segvoialabs corn <br /> ' Geological Technics,Inc Project Marci Property 5408474 <br /> P <br /> ' 1101 7th Street Project Number 3RD QTR 2004 Reported <br /> Modesto CA,95354 Project Manager Joseph Angulo 09/03/04 17 30 <br /> GasolinelBTEXIOxygenates 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 4080482-EPA 5030B{P/TJ <br /> _Matn_a Spike Dup(4080482-MSD1) Source 5408474-02 Prepared 09/01/_04 Analyzed 09/02/04 <br /> Methyl tett-butyl ether 9 18 0 50 ug/l 8 64 ND 106 60440 6 25 <br /> ' 13=7=e 5 59 050 5 36 ND 104 70-130 7 25 <br /> Toluene 35 9 050 303 ND 118 70-130 3 25 <br /> Gasoline Range Orgamcs(C4-C12) 359 50 440 ND 82 60-140 4 25 <br /> ' Surrogate Toluene-d8 106 100 106 60-140 <br /> Surrogate 4-BFB 8 61 100 86 60-140 <br /> Surrogate 1 2-DCA-d4 938 100 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 slated,results are reported on a wet weight <br /> basis This analytical report must be reproduced an its entorety <br /> Page 15 of 16 <br />