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R19 Striker Ave Ste 9 <br /> 1L1 �� Sacramenlc,CA 95914 <br /> (9 16)971-96DO <br /> Analytical Fw.scqAX D9ahs,cn0 ` <br /> www.sequoialahs,com <br /> [Ger-Ryan-Petaluma Project: Tosco 11195,Lathrop,CA S212525 <br /> N McDowell Blvd. Ste B2 ProjectNumber: NIA Reported: <br /> uma CA,94954 Project Manager: Dave Vossler 12/34/02 19:17 <br /> Total Purgeable Hydrocarbon,BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %RRC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2120444-EPA 5030E(PIT) <br /> Laboratory Control Sample(2120444-BSI) Prepared&Analyzed: 12/27/02 <br /> Surrogate:a,a,a-Trifluorntoluene 0.0160 mg/kg 0.0200 80 60-140 <br /> Laboratory Control Sample(2120444-BS2) Prepared&Analyzed: 12/20/42 <br /> Benzene 0.0164 0.0050 mg/kg 0.0200 82 70-130 <br /> Toluene 0.0169 0.0050 0.0200 84 70-130 <br /> Ethyfbenzene 0.0176 0,0050 0.0200 88 70-130 <br /> Xylenes(total) 0.0519 0.0050 0.0600 86 70-130 <br /> Methyl tert-butyl etber 0.0177 0.0050 0.0200 98 70-130 <br /> Surrogate:a,a,a-Tris luorotoluene 0.0150 00200 75 60-140 <br /> Laboratory Control Sample(2120444-BS3) Prepared: 12/23/02 Analyzed: 12/24/42 :,ll <br /> Benzene 81.2 25 mg/kg 100 81 70-130 <br /> Toluene 81.5 25 100 82 70-130 <br /> Ethylbenzene 80.5 25 100 80 70-130 <br /> Xylenes(total) 233 25 300 78 70-130 <br /> Methyl tert-butyl ether 88.5 25 100 88 70-130 <br /> Surrogate:a,a,a-Tiifluorotoluene 0.907 1.00 91 60-140 <br /> Duplicate(2120444-DUPI) Source:5212525-01 Prepared&Analyzed: 12/27/02 <br /> Purgeable Hydrocarbons ND 0.10 mglkg ND 50 <br /> Benzene ND 0,0050 " ND 50 <br /> Toluene ND 11.0050 " ND 50 <br /> Ethylbenzene ND 0.0050 ND 50 <br /> Xylenes(totat) ND 0.0050 ND 50 <br /> Methyl tcrt-butyl ether 0.00658 0.0050 0.0079 18 50 <br /> Surrogate:a,a,a-Trifluoratohrene 0.0144 0.0200 72 60-140 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples araIYaed in accordance with the chain of <br /> custody document. Unless otherwise stated,results are reported on a wet ryeight basis- <br /> This analytical report must be reproduced irh its entirety. <br /> Page 6 of 8 <br />