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Ave <br /> Sequoia 81amento CA95 34 <br /> tl� . . + ) Sacramento, 92 49600 <br /> Analytical (9 t6)921-9600 <br /> FAX(9!b)92 I-0100 <br /> www.sequofalabs.com <br /> Kleinfelder-Stockton Project: Del Monte S304714 <br /> 2825 East Myrtle Street Project Number: 12280.REM2 Reported: <br /> Stockton CA,95205 Project Manager: Tony Martin 05/13/03 17:31 <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 3050107-EPA 5030B [PIT] <br /> Blank,(3050107-BLK2) Prepared&Analyzed:05/07/03 <br /> Surrogate.-4-BFB 0.0460 mg/kg 0.0500 92. 60-140 <br /> La bore tory.Control Sample(3050107-BS1) Prepared&Analyzed:05/07/03 <br /> Methyl tert-butyl ether 0.0464 0.0050 mg/kg 0.0448 104 60-140 <br /> Benzene 0.0251 . 0.0050 0.027292 70-130 <br /> Toluene 0.154 0.0050 0.167 92 70-130 <br /> Surrogate.,1,2-DCA-d4 0.0496 0.0500 99 60=140 <br /> Surrogate:Toluene-d8 0.0503 0.0500 101 60-140 <br /> Surrogate:4-BFB 0.0494 0.0500 99 60-140 <br /> Laboratory Control Sample(3050107-BS2) Prepared:05/07/03 Analyzed:05/08/03 <br /> 3asoline(C6.-CIO) 1.88 1.0 mg/kg 2.20' 85 70-130 <br /> Surrogate:1,2-DCA-d4 0.0505 0.0500 101 60440 <br /> Surrogate:Toluene-d8 0.0500 0.0500 100 60-140 <br /> Surrogate.'4-BFB 0.0493 0.0500 99 60-140 <br /> Laboratory Control Sample(3050107-BS3) Prepared:05/07/03 Analyzed;05/08/03 <br /> Methyl tert-butyl ether 0.0526 0.005¢ mg/kg 0.0500 105 60-140 <br /> Benzene, 0.0495 0.0050 0.0500 99 70-130 <br /> Toluene 0.0504 0.0050 0.0500 101 70-130 <br /> Surrogate:1,2-DCA-d4 0.0508 0:0500 101 60-140 <br /> Surrogate:.Toluene-d8 0.0526 0.0500 105 60-140 <br /> Surrogate:4-BFB . 0.0482 .0.0500 96 60-140 <br /> Matrix Spike(3050107-MSI) Source:5304612-04 Prepared&Analyzed:05/07/03 <br /> Methyl tert-butyl ether 0.0426 0.0050 mg/kg 0.0448 ND 95 60-140 <br /> Benzene 0.0252 0.0050 0.0272 ND 93 60-140 <br /> Toluene 0.160 00050 0.167 0.0056 92 60-140 <br /> Gasoline(C6-C10) 1.31 1.0 2.20 ND 60 .60-140 <br /> Surrogate:1,2-DCA-d4 0.0482 0.0500 96 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 staled,results are reported on a wet weight basis. <br /> l This.analytical report must be reproduced in tls entirety. <br /> Page 5 of 7 <br />