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L <br />Sequoia <br />4w An-alytical <br />819 Striker Avenue, Suite 8 <br />Sacramento, CA 95834 <br />(916)921-9600 <br />FAX (916) 921-0100 <br />www.sequoialabs.com <br />Kleinfelder - Stockton <br />Project: <br />Northbrook <br />S309020 <br />2825 East Myrtle Street <br />Project Number: <br />34202.E01 <br />Reported: <br />toe on CA, 52 5 Project Manager, Joe Z-1 es 09 OS 03 14.17 <br />Gasoline (2-Methylpentane to 1,2;4-Trimethylbenzene) and BTEX by EPA 8015M and 8021B - Quality Contr <br />rrSequoia Analytical - Sacramento <br />L <br />Reporting Spike Source %REC. RPD <br />analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />. L <br />Batch 3080397 - EPA 5030B (P/T) <br />Blank (3080397-BL.Kl) <br />Prepared & Analyzed: 08/28/03 <br />Hydrocarbons <br />ND - <br />0.10 <br />mg/kg <br />LPurgeable <br />Benzene <br />ND <br />0.0050 <br />Toluene <br />IND <br />0.0050 <br />Ethylbenzene <br />ND <br />0.0050 <br />" <br />Xylenes (total) <br />ND <br />0.0050 <br />" <br />Surrogate: a,a,a-Tris luorotoluene <br />0.0248 <br />0.0200 124 60-140 <br />Blank (3080397-BLK2) <br />Prepared & Analyzed: 08/29/03 <br />LPurgeable Hydrocarbons <br />ND <br />0.10 <br />mg/kg <br />Benzene <br />ND <br />0.0050 <br />" <br />Toluene <br />ND <br />0.0050 <br />" <br />LEthylbenzene <br />ND <br />0.0050 <br />" <br />Xylenes (total) <br />ND <br />0.0050 <br />" <br />Surrogate: a,a,a-Tris luorotoluene <br />0.0228 <br />0.0200 114 60-140 <br />LBlank <br />(3080397-BLK3) <br />Prepared & Analyzed: 09/03/03 <br />Purgeable Hydrocarbons <br />ND <br />0.10 <br />mg/kg <br />- <br />Benzene <br />ND <br />0.0050 <br />" <br />ND <br />0.0050 <br />" <br />LToluene <br />Ethylbenzene <br />ND <br />0.0050 <br />" <br />Xylenes (total) <br />ND <br />0.0050 <br />" <br />a,a,a-Tris luorotoluene <br />0.0233 <br />0.0200 116 60440 <br />LSurrogate: <br />Laboratory Control Sample (3080397-BS1) <br />Prepared &-Analyzed: 08/28/03 <br />Benzene <br />0.0228 <br />0.0050 <br />mg/kg <br />0.0200 114 70-130 <br />0.0230 <br />0.0050. <br />0.0200. 115 70-130 <br />LToluene <br />Ethylbenzene <br />0.0211 <br />0.0050 <br />0.0200 106 70-130 <br />Xylenes (total) <br />0.0651 <br />0.0050 <br />0.0600 108 70-130 <br />LSurrogate: a,a,a-Tris luorotoluene 0.0239 <br />11 0.0200 120 60-140 <br />L <br />Sequoia Analytical - Sacramento The results in this report apply to the samples' analyzed in accordance with the chain of <br />Lcustody document. Unless otherwise stated, results are reported on a wet weight basis. This analytical report must be reproduced in its entirety. <br />L <br />Page 9 of 18 <br />