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QSequoia U <br />� Analytical _ <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 />1444 Mariposa <br />S309079 <br />2825 East Myrtle Street <br />Project Number: <br />34202 <br />Reported: <br />Stockton CA, 95205 <br />Project Manager:. <br />Francis Bean <br />09/09/03 16:14 - <br />Polychlorinated Biphenyls by EPA Method 8082 - Quality Control l <br />Sequoia Analytical - Sacramento <br />Reporting Spike Source %REC RPD <br />knalyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch 3090108- EPA 3550B <br />35.9 <br />33.3 108 50-150 <br />Matrix Spike (3090108 -MSI) <br />Blank (3090108-BLKI) <br />Prepared & Analyzed: 09/08/03 <br />PCB -1016 <br />Prepared & Analyzed: 09/08/03 <br />PCB -1016 <br />ND <br />33 <br />ug/kg <br />PCB -1221 <br />ND <br />60 <br />" <br />PCB -1232 <br />ND <br />33 <br />" <br />PCB -1242 <br />ND <br />33 <br />" <br />PCB -1248 <br />ND <br />33 <br />" <br />PCB -1254 <br />ND <br />33 <br />" <br />PCB -1260 <br />ND <br />33 <br />" <br />Surrogate: Decachlorobiphenyl <br />31.7 <br />33.3 98 50-150 <br />Laboratory Control Sample (3090108-BS1) <br />Prepared & Analyzed: 09/08/03 <br />PCB -1016 <br />316 <br />33 <br />ug/kg 333 95 50-150 <br />PCB -1260 <br />300 <br />33 <br />333 90 50-150 <br />Surrogate: Decachlorobiphenyl <br />35.9 <br />33.3 108 50-150 <br />Matrix Spike (3090108 -MSI) <br />Source: S309079-01 <br />Prepared & Analyzed: 09/08/03 <br />PCB -1016 <br />300 33 <br />ug/kg 333 ND 90 . 50-150 <br />PCB -1260 <br />268 33 <br />333 ND 80 50-150 <br />Surrogate: Decachlorobiphenyl <br />32.4 <br />33.3 97 50-150 <br />Matrix Spike Dup (3090108-MSDI) <br />Source: S309079-01 <br />Prepared: 09/08/03 Analyzed: 09/09/03 <br />PCB -1016 <br />365 33 <br />ug/kg 333 ND 110 50-150 20 50 <br />PCB -1260 <br />338 33 <br />333 ND 102 50-150 23 50 <br />Surrogate: Decachlorobiphenyl <br />44.5 <br />33.3 134 50-150 <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 />Page 11 of 17 <br />