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t 1 <br /> ®1 819 Striker Avenue,Suit <br /> equoia e <br /> Sacramento,CA 9583 <br /> (916)921-9600 <br /> FAX(916) � <br /> 10- <br /> Analytical <br /> cal wwwsequoialabs.cor � <br /> J <br /> Kleinfelder-Stockton Project: Northbrook S308269 <br /> 2825 East Myrtle Street Project Number: 34202.E01 Reported: <br /> Stockton CA,95205 Project Manager: Joe Zilles 08/20/03 17:53 <br /> Gasoline (2-Methylpentane to 1,2,4-Trimethylbenzene) and BTEX by EPA 8015M and 8021B - Quality Contr J <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3080164-ETA 5030B(P/T) <br /> Blank(30801.64-BLK 1) Prepared&Analyzed: 08/13/03 <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 /> Surrogate:a,a,a-Tri,/luorotoluene 0.0197 0.0200 98 60-140 <br /> Blank(3080164-BLI(2) Prepared&Analyzed: 08/18/03 <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 /> Surrogate:a,a,a-Trijluo,-otoluene 0.0180 0.0200 90 60-140 <br /> Laboratory Control Sample(3080164-BSI) Prepared&Analyzed: 08/13/03 <br /> Benzene 0.0211 0.0050 mg/kg 0.0200 106 70-130 <br /> Toluene 0.0219 0.0050 0.0200 110 70-130 <br /> Ethylbenzene 0.0213 0.0050 0.0200 106 70-130 <br /> Xylenes(total) 0.0655 0.0050 0.0600 109 70-130 <br /> Surrogate:a,a,a-Trifluo.,-otoluene 0.0212 0.0200 106 60-140 <br /> Laboratory Control Sample(3080164-BS2) Prepared&Analyzed:08/18/03 <br /> Benzene 0.0196 0.0050 mg/kg 0.0200 98 70-130 I <br /> Toluene 0.0201 0.0050 0.0200J <br /> 100 70-130 <br /> Ethylbenzene <br /> 0.0197 0.0050 0.0200 98 70-130 <br /> Xylenes(total) 0.0591 0.0050 0.0600 98 70-]30 <br /> Surrogate:a,a,a-Tri/luo,-otoluene 0.0240 0.0200 120 60-140 <br /> t <br /> Sequoia Analytical-Sacramento <br /> 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 20 of 29 J <br />