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■ 819 Striker Ave Ste 8 <br /> 04 -0S e q u o l`a SacratncnLo,CA 95834 <br /> (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> rte' www.sequoialabs.corn <br /> "n. <br /> =-Gettler-Ryan-Petaluma Project: Tosco 11195,Lathrop,CA 5212525 <br /> 1364 N McDowell Blvd.Ste B2 Project Number: N/A Reported: <br /> Petaluma CA,94954 Project Manager: Dave Vossler 12/30/02 19:17 <br /> Total Purgeable Hydrocarbon,BTEX and MTBE by DHS LUFT-Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %RFC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2120444-EPA 5030B(P/T) <br /> Blank(2120444-BLKI) Prepared&Analyzed: 12/27/02 <br /> Purgeable Hydrocarbons ND 0.10 mg/kg <br /> Benzene ND 0.0050 " <br /> Toluene ND 0.0050 " <br /> Ethylbenzene ND 0.0050 " <br /> Xylenes(total) ND 0.0050 " <br /> Methyl tert-butyl ether ND 0.0050 <br /> Surrogate:a,a,a-Trifiuorolohtene 0.0161 0.0200 81 60-140 <br /> Blank(2120444-BLK2) Prepared&Analyzed: 12/20/02 <br /> Purgeable Hydrocarbons ND 0.10 mg/kg <br /> Benzene ND 0.0050 " <br /> ND 0.0050 " <br /> '=s(hylbenzene ND 0.0050 " <br /> Xylenes(total) ND 0.0050 " <br /> Methyl tert-butyl ether ND 0.0050 " <br /> Surrogate:a,a,a-Trifluo-otoluene 0.0150 0.0200 75 60-140 <br /> Blank(2120444-BLK3) Prepared: 12/23/02 Analyzed:12/24/02 <br /> Purgeable Hydrocarbons ND 5,0 mg/kg <br /> Benzene ND 0,25 " <br /> Toluene ND 0.25 " <br /> Ethylbenzene ND 0.25 " <br /> Xylenes(total) ND 0.25 " <br /> Methyl tert-butyl ether ND 0,25 " <br /> Surrogate:a,a,a-Trifluorotoluene 0.876 1.00 88 60-140 <br /> Laboratory Control Sample(2120444-BSI) Prepared&Analyzed. 12/27/02 <br /> Benzene 0.0159 0.0050 mglkg 0.0200 80 70-130 <br /> Toluene 0.0163 0.0050 0.0200 82 70-130 <br /> Ethylbenzene 0.0173 0.0050 0.0200 87 70-130 <br /> Xylenes(total) 0.0510 0.0050 0.0600 85 70-130 <br /> Methyl tert-butyl ether 0.0170 0.0050 0.0200 85 70-130 <br /> _:Sequoia Analytical-Sacramento The results in this report apply to the samples analv;ed in accordance with the chain of <br /> custody docunew. Unless otherlvise slated,results are reported on a wet iveight basis. <br /> This analptical report must be reproduced in its entirety. <br /> Page 5 of 8 <br />