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Sequoia <br />Analytical <br />819 Striker Avenue, Suite 8 <br />Sacramento, CA 95834 <br />(916)921-9600 <br />FAX (916) 921 -0 100 <br />www.sequoialabs.com <br />Kleinfelder - Stockton Project: Trade Way <br />2825 East Myrtle Street Project Number: 20-3978-03.CH-V Reported: <br />IStockton CA, 95205 Project Manager: Joe Zilles 06/04/02 14:06 <br />Total Purgeable Hydrocarbons and BTEX by DHS LUFT - 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 2050336 - EPA 5030B (P <br />Blank (2050336-BLK1) <br />0.0180 <br />Prepared & Analyzed: 05/30/02 <br />Purgeable Hydrocarbons <br />ND <br />0.50 mg/kg <br />Benzene <br />ND <br />0.0050 " <br />roluene <br />ND <br />0.0050 " <br />Ethylbenzene <br />ND <br />0.0050 " <br />Kylenes (total) <br />ND <br />0.0050 " <br />Surrogate: a,a,a-Trifluorotoluene 0.0181 110.0200 91 60-140 <br />LCS (2050336-BS1) <br />0.0180 <br />Source: S205280-01 <br />Prepared & Analyzed: 05/30/02 <br />Benzene <br />0.0174 <br />0.0050 <br />mg/kg 0.0200 87 70-130 <br />roluene <br />0.0192 <br />0.0050 <br />0.0200 96 70-130 <br />Ethylbenzene <br />0.0190 <br />0.0050 <br />0.0200 95 70-130 <br />Kylenes (total) <br />0.0584 <br />0.0050 <br />0.0600 97 70-130 <br />Surrogate: a,a,a-TriJluorotoluene <br />0.0180 <br />Source: S205280-01 <br />0.0200 <br />90 <br />60-140 <br />Matrix Spike (2050336 -MSI) <br />0.0050 mg/kg <br />Source: S205280-01 <br />Prepared & Analyzed: 05/30/02 <br />Benzene <br />0.0176 <br />0.0050 mg/kg <br />0.0200 <br />ND <br />88 <br />60-140 <br />Toluene <br />0.0185 <br />0.0050 <br />0.0200 <br />ND <br />92 <br />60-140 <br />Ethylbenzene <br />0.0191 <br />0.0050 <br />0.0200 <br />ND <br />96 <br />60-140 <br />Kylenes (total) <br />0.0581 <br />0.0050 <br />0.0600 <br />ND <br />97 <br />60-140 <br />Surrogate: a,a,a-TriJluorotoluene <br />0.0184 <br />25 <br />0.0200 <br />0.0182 <br />92 <br />60-140 <br />Matrix Spike Dup (2050336-MSD1) <br />Source: S205280-01 <br />Prepared & Analyzed: 05/30/02 <br />Benzene <br />0.0179 <br />0.0050 mg/kg <br />0.0200 <br />ND <br />90 <br />60-140 <br />2 <br />25 <br />Toluene <br />0.0182 <br />0.0050 <br />0.0200 <br />ND <br />91 <br />60-140 <br />2 <br />25 <br />Ethylbenzene <br />0.0190 <br />0.0050 <br />0.0200 <br />ND <br />95 <br />60-140 <br />0.5 <br />25 <br />Xylenes (total) <br />0.0583 <br />0.0050 <br />0.0600 <br />ND <br />97 <br />60-140 <br />0.3 <br />25 <br />Surrogate: a,a,a-Tris luorotoluene <br />0.0182 <br />0.0200 <br />91 <br />60-140 <br />Sequoia Analytical - Sacramento <br />The results in this report apply to the samples analyzed in accordance with the chain of <br />custody document. This analytical report must be reproduced in its entirety. <br />Page 10 of 13 <br />�0 <br />