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819 SAve Ste 8 <br /> 15) Sequoia Sacramento, <br /> CA 45834 <br /> k ]k_ a W l (916)921 9600 <br /> H 11aly llcal rxti 19101 Jet iIIW <br /> WWW sequotalabs i,om <br /> Gettler-Ryan-Petaluma Project Tosca 11192,Stockton,CA 5307501 <br /> 1364 N McDowell Blvd Ste B2 Project Number N/A Reported <br /> Petaluma CA,94954 Project Manager Dave Vossler 08/05/03 17 35 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RTIC <br /> Analyte Result Lunt Units Level Result °/REC Limits RPD Ltaut Nates <br /> Bateb 3080034-EPA 5030B [P/TJ <br /> Blank(3080034-BLKI) Prepared 08/04/03 Analyzed 08/05/03 <br /> Tert-butyl alcohol ND 100 ug/l <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 20 " <br /> Tert-amyl methyl ether ND 20 <br /> Ethanol ND Soo " <br /> 1 2 Dichloroethane ND 20 <br /> 1,2-Dibromoethane(EDB) ND 20 " <br /> Surrogate 12 DCA-d4 244 250 98 60 140 <br /> Laboratory Control Sample(3080034-BSI) Pre ared 08/04/03 Analyzed 08/05/03 <br /> Surrogate 11-DCA-d4 262 ug/1 250 105 60-140 <br /> Matrix Spike(3080034-MS1) Source 5307514-02 Prepared&Analyzed 08/05/03 . <br /> Surrogate 1 2-DCA-d4 250 ug/1 250 100 60-140 <br /> Matrix Spike Du (3080034-MSD1) Source 5307514-02 Prepared&Analyzed 08/05/03 <br /> Surrogate 11DCA-d4 244 ug/l 250 98 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 be reproduced in its entirety <br /> Page 6 of 7 <br />