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• �,�_,/r 819 Striker Avenue,Suite 8 { <br /> S e qu o 1 a Sacramento,CA 95834 <br /> ® (916)921-9600 <br /> FAX(916)92 1-0100 <br /> .Analytical www.sequoWabs.com <br /> Kleinfelder-Stockton Project: 1444 Mariposa S309079 1 <br /> 2825 East Myrtle Street Project Number: 34202 Reported: J <br /> Stockton CA,95205 Project Manager: Francis Bean 09/09/03 16:14 <br /> i <br /> BTEX by DHS LUFT - Quality Control 1 <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3090054-EPA 5030B (P/T) , <br /> Blank(3090054-BLKI) Prepared&Analyzed:09/04/03 J <br /> Benzene ND 0.0050 mg/kg <br /> Toluene ND 0.0050 <br /> Ethylbenzene ND 0.0050 " <br /> Xylenes(total) ND 0.0050 " <br /> Surrogate:a,a,a-Trifluorotoluene 0.0235 0.0200 118 60-140 <br /> Laboratory Control Sample(3090054-BS1) Prepared&Analyzed:09/04/03 <br /> Benzene 0.0244 0.0050 mg/kg 0.0200 122 70-130 <br /> Toluene 0.0251 0.0050 0.0200 126 70-130 t <br /> Ethylbenzene 0.0244 0.0050 0.0200 122 70-130 <br /> Xylenes(total) 0.0739 0.0050 0.0600 123 70-130 <br /> Surrogate:a,a,a-Tris luorotoluene 0.0153 0.0200 126 60-140 <br /> Matrix Spike(309005.3-MSI) Source:5309086-01 Prepared&Analyzed: 09/04/03 <br /> Benzene 0.0213 0.0050 mg/kg 0.0200 ND 106 60-140 <br /> Toluene 0.0219 0.0050 0.0200 ND 110 60-140 1 <br /> Ethylbenzene 0.0210 0.0050 0.0200 ND 105 60-140 <br /> Xylenes(total) 0.0638 0.0050 0.0600 NO 106, 60-140 <br /> Surrogate:a,a,a-Trifluorotoluene 0.0131 0.0200 116 .60-140 <br /> Matrix Spike Dup(3090054-MSD1) Source: S309086-01 Prepared&Analyzed:09/04/03 <br /> Benzene 0.0213 0.0050 mg/kg 0.0200 ND 106 60-140 0 25 <br /> Toluene 0.0219 0.0050 " 0.0200 ND, 110 60-140 0 25 , <br /> Ethylbenzene 0.0212 0.0050 0.0200 ND 106 60-140 0.9 25 <br /> Xylenes(total) 0.0648 0.0050 0.0600 ND 108 60-140 2 25 <br /> Surrogate:a,a,a-Trifluorotoluene 0.0239 0.0200 120 60-140 1 <br /> J <br /> J <br /> J <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 8 of 17 t <br /> J <br />