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N <br />Sequoia <br />iW Analytical <br />M <br />819 Striker Ave Ste 8 <br />Sacramento, CA 95834 <br />(916) 921-9600 <br />FAX (916) 921-0100 <br />www.sequoialabs.com <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 />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 />Batch 3080244 - EPA 5030B fP/T <br />Laboratory Control Sample (3080244 -BSI) <br />0.0558 <br />0.0500 <br />Prepared & Analyzed: 08/18/03 <br />60-140 <br />Benzene <br />0.0556 <br />0.0050 <br />mg/kg 0.0500 <br />111 <br />70-130 <br />Chlorobenzene <br />0.0567 <br />0.0050 <br />0.0500 <br />113 <br />70-130 <br />1,1-Dichloroethene <br />0.0586 <br />0.0050 <br />0.0500 <br />117 <br />70-130 <br />Toluene <br />0.0556 <br />0.0050 <br />0.0500 <br />111 <br />70-130 <br />Trichloroethene <br />0.0484 <br />0.0050 <br />0.0500 <br />97 <br />70-130 <br />Surrogate: Dibromofluoromethane <br />0.0558 <br />0.0500 <br />112 <br />60-140 <br />Surrogate: 1,2 -DCA -d4 <br />0.0565 <br />0.0500 <br />113 <br />60-140 <br />Surrogate: Toluene -d8 <br />0.0500 <br />0.0500 <br />100 <br />60-140 <br />Surrogate: 4 -BFB <br />0.0521 <br />0.0500 <br />104 <br />60-140 <br />Matrix Spike (3080244-MS1) <br />Source: S308269-04 <br />Prepared & Analyzed: 08/18/03 <br />125 <br />Benzene <br />0.0660 <br />0.0050 <br />mg/kg 0.0500 <br />ND <br />132 <br />60-140 <br />Chlorobenzene <br />0.0679 <br />0.0050 <br />0.0500 <br />ND <br />136 <br />60-140 <br />1,1-Dichloroethene <br />0.0714 <br />0.0050 <br />0.0500 <br />ND <br />143 <br />60-140 Q-LIM <br />Toluene <br />0.0668 <br />0.0050 <br />0.0500 <br />ND <br />134 <br />60-140 <br />Trichloroethene <br />0.0592 <br />0.0050 <br />0.0500 <br />ND <br />118 <br />60-140 <br />Surrogate: Dibromofluoromethane <br />0.0625 <br />0.0500 <br />125 <br />60-140 <br />Surrogate: 1,2 -DCA -d4 <br />0.0635 <br />0.0500 <br />127 <br />60-140 <br />Surrogate: Toluene -d8 <br />0.0591 <br />0.0500 <br />118 <br />60-140 <br />Surrogate: 4 -BFB <br />0.0652 <br />0.0500 <br />130 <br />60-140 <br />Matrix Spike Dup (3080244-MSDI) <br />Source: S308269-04 <br />Prepared & Analyzed: 08/18/03 <br />108 <br />60-140 <br />Surrogate: 1,2 -DCA -d4 <br />Benzene <br />0.0551 <br />0.0050 <br />mg/kg 0.0500 <br />ND <br />110 <br />60-140 <br />18 <br />25 <br />Chlorobenzene <br />0.0561 <br />0.0050 <br />0.0500 <br />ND <br />112 <br />60-140 <br />19 <br />25 <br />1,1-Dichloroethene <br />0.0589 <br />0.0050 <br />0.0500 <br />ND <br />118 <br />60-140 <br />19 <br />25 <br />Toluene <br />0.0548 <br />0.0050 <br />0.0500 <br />ND <br />1 110 <br />60-140 <br />20 <br />25 <br />Trichloroethene <br />0.0474 <br />0.0050 <br />0.0500 <br />ND <br />95 <br />60-140 <br />22 <br />25 <br />Surrogate: Dibromofluoromethane <br />0.0542 <br />0.0500 <br />108 <br />60-140 <br />Surrogate: 1,2 -DCA -d4 <br />0.0552 <br />0.0500 <br />110 <br />60-140 <br />Surrogate: Toluene -d8 <br />0.0499 <br />0.0500 <br />100 <br />60-140 <br />Surrogate: 4 -BFB <br />0.0545 <br />0.0500 <br />109 <br />60-140 <br />Sequoia Analytical - Sacramento 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 />pnoa 7R of 7Q <br />