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919 Straker Ave Ste 8 <br /> / } <br /> Sequoia Sacramento CA 9 <br /> (9]6)921-99600600 <br /> A�,alvtii-al �, <br /> FAX(916)921-0100 <br /> www az4ua1auS 00n,i <br /> Gettler-Ryan Petaluma Project Tosco 11192, Stockton,CA 5212209 <br /> 1364 N McDowell Blvd Ste B2 ProlectNumber N/A Reported <br /> Petaluma CA,94954 Project Manager Dave Vossler 12/31/02 11 16 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result °/aREC Limits RPD Limit Notes <br /> Batch 2120184-EPA 5030B [P/T] <br /> Laboratory Control Sample(2120184-BS3) Prepared&Analyzed 12/16/02 <br /> Methyl tent-butyl ether 00386 0 0050' mg/kg 00500 77 60-140 <br /> Surrogate 12 DCA d4 00429 00500 86 60-140 <br /> Laboratory Control Sample(2120184-BS4) Prepared&Analyzed 12/16/02 <br /> Methyl tert-butyl ether 00320 00050 mg/kg 00449 71 60-140 <br /> Surrogate 12-DCA-d4 00432 00300 86 60-140 <br /> Matrix Spike(2120184-MS1) Source 5212087-10 Prepared 12/12/02 Analyzed 12/14/02 <br /> Methyl tert-butyl ether 00485 00050 mg/kg 00500 ND 95 60-140 <br /> Surrogate 12-DCA-d4 00491 " 00500 98 60-140 <br /> Matrix Spike(2120184-MS2) Source 5212087-10 Prepared 12/12/02 Analyzed 12/14/02 <br /> Methyl tert-butyl ether 00409 00050 mg/kg 00448 ND 89 60-140 <br /> Surrogate 12-DCA-d4 00476 00500 95 60-140 <br /> Matrix Spike Dup(2120184-MSD1) Source 5212087-10 Prepared 12/12/02 Analyzed 12/14/02 <br /> Methyl tert-butyl ether 00489 00050 mg/kg 00500 ND 96 60-140 08 25 <br /> Surrogate 12-BCA-d4 00489 1100500 98 60-140 <br /> Matrix Spike Dup(2120184-MSD2) Source S212087-10 Prepared 12/12/02 Analyzed 12/14/02 <br /> Methyl tert-butyl ether 00406 00050 mglkg 0 0448 ND 89 60-140 07 25 <br /> Surrogate 12-DCA-d4 -- 0 0472- — 00500 94 60-140 <br /> Batch 2120306-EPA 5030B [MeOH] <br /> Blank(2120306-BLKI) Prepared&Analyzed 12/18/02 <br /> Ten-butyl alcohol ND 2 5 mg/kg <br /> Methyl tort-butyl ether ND 0 25 " <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 10 of 13 <br />