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1 <br />Sequoia � <br />Analytical _ <br />a 4 <br />819 Striker Avenue, Suite 8-1 <br />Sacramento, CA 95834 <br />(916)921-9600 <br />FAX (916) 921-0100' 1 <br />www.sequoialabs.com 1 <br />Kleinfelder - Stockton Project: Northbrook S309020 <br />2825 East Myrtle Street Project Number: 34202.E01 Reported: <br />Stockton CA, 9520_` Project Manager: Joe Zilles 09/05/03 14:17 <br />Volatile Organic Compounds by EPA Method 8260B - 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 />a.«.... -,v1-, -- x h JVJVD li/ 1 t <br />Blank (3090027-BLl{1) <br />Prepared & Analyzed: 09/02/03 <br />p-Isopropyltoluene <br />ND <br />0.0050 <br />mg/kg <br />Methylene chloride <br />ND <br />0.025 <br />Methyl tert-butyl ether <br />ND <br />0.0050 <br />" <br />Naphthalene <br />ND <br />0.0050 <br />— <br />n-Propylbenzene <br />ND <br />0.0050 <br />" <br />Styrene <br />ND <br />0.0050 <br />I <br />1,1,1,2-Tetrachloroetha•te <br />ND <br />0.0050 <br />J <br />1,1,2,2-Tetrachloroetha7te <br />ND <br />0.0050 <br />" <br />Tetrachloroethene <br />ND <br />0.0050 <br />Toluene <br />ND <br />0.0050 <br />" <br />1,2,3-Trichlorobenzene <br />ND <br />0.0050 <br />" <br />1,2,4-Trichlorobenzene <br />ND <br />0.0050 <br />1,1,1 -Trichloroethane <br />ND <br />0.0050 <br />" <br />1,1,2 -Trichloroethane <br />ND <br />0.0050 <br />" <br />Trichloroethene <br />ND <br />0.0050 <br />" <br />Trichlorofluoromethane <br />ND <br />0.025 <br />1,2,3-Trichloropropane <br />ND <br />0:0050 <br />1,2,4-Trimethylbenzene <br />ND <br />0.0050 <br />" <br />1,3,5-Trimethylbenzene <br />ND <br />0.0050 <br />Vinyl chloride <br />ND <br />0.025 <br />" <br />m,p-Xylene <br />ND " <br />0.0050 <br />" <br />Ethanol <br />ND <br />0.20 <br />Tert-amyl methyl ether <br />ND <br />0.0050 <br />" <br />Ethyl tert-butyl ether <br />ND <br />0.0050 <br />" <br />Di -isopropyl ether <br />ND <br />0.0050 <br />" <br />Tert-butyl alcohol <br />ND <br />0.050 <br />Surrogate- Dibromofluoromethane <br />0.0574 <br />0.0500 <br />�I <br />Surrogate: 1,2 -DCA -d4 <br />0.0632 <br />115 60-140 <br />Surrogate: Toluene -d8 <br />0.0556 <br />0.0500 126 60-140 <br />Surrogate: 4 -BFB <br />0.0500 I11 60-140 <br />0.0554 <br />0.0500 111 60-140 <br />Sequoia Analytica l - 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 <br />analytical report must be reproduced in its entirety. <br />Page 16 of 18 <br />z� <br />