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Sequoia <br />Analytical <br />i 1 <br />819 Striker Avenue, Suite <br />Sacramento, CA 9583 <br />(916)921-9600 <br />FAX (916) 921 -0 1 O' <br />www.sequoialabs.cor <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 />J <br />J <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 />1 <br />Batch 3080164 - ETA 5030B (P/T) <br />Blank (30801.64-BLK 1) <br />Prepared & Analyzed: 08/13/03 <br />Purgeable Hydrocarbons <br />ND <br />0.10 <br />mg/kg <br />Benzene <br />ND <br />0.0050 <br />Toluene <br />ND <br />0.0050 <br />" <br />Ethylbenzene <br />ND <br />0.0050 <br />" <br />Xylenes (total) <br />ND <br />0.0050 <br />" <br />Surrogate: a, a, a-Tri,/luorotoluene <br />0.0197 <br />0.0200 98 60-140 <br />Blank (3080164-BLI(2) <br />Prepared & Analyzed: 08/18/03 <br />Purgeable Hydrocarbons <br />ND <br />0.10 <br />mg/kg <br />Benzene <br />ND <br />0.0050 <br />Toluene <br />ND <br />0.0050 <br />" <br />Ethylbenzene <br />ND <br />0.0050 <br />" <br />Xylenes (total) <br />ND <br />0.0050 <br />Surrogate: a,a,a-Trijluo,-otoluene <br />0.0180 <br />0.0200 90 60-140 <br />Laboratory Control Sample (3080164 -BSI) <br />Prepared & Analyzed: 08/13/03 <br />Benzene <br />0.0211 <br />0.0050 <br />mg/kg <br />0.0200 106 70-130 <br />Toluene <br />0.0219 <br />0.0050 <br />0.0200 110 70-130 <br />Ethylbenzene <br />0.0213 <br />0.0050 <br />0.0200 106 70-130 <br />Xylenes (total) <br />0.0655 <br />0.0050 <br />0.0600 109 70-130 <br />Surrogate: a,a,a-Trifluo.,-otoluene <br />0.0212 <br />0.0200 106 60-140 <br />Laboratory Control Sample (3080164-BS2) <br />Prepared & Analyzed: 08/18/03 <br />Benzene <br />0.0196 <br />0.0050 <br />mg/kg <br />0.020098 70-130 <br />I <br />Toluene <br />0.0201 <br />0.0050 <br />0.0200 100 70-130 <br />J <br />Ethylbenzene <br />0.0197 <br />0.0050 <br />0.0200 98 70-130 <br />Xylenes (total) <br />0.0591 <br />0.0050 <br />0.0600 98 70-] 30 <br />Surrogate: a,a,a-Tri/luo-•otoluene <br />0.0240 <br />0.0200 120 60-140 <br />J <br />J <br />Sequoia Analytical - Sacramento - i <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. J <br />Page 20 of 29 J <br />