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ki <br />Sequoia <br />` Analytical <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 <br />Project: <br />Northbrook <br />S308269 <br />2825 East Myrtle Street <br />Project Number: <br />34202.E01 <br />Reported: <br />Stockton CA, 95205 <br />Project Manager: <br />Joe Zilles <br />08/20/03 17:53 <br />Polychlorinated Biphenyls by EPA Method 8082 - 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 3080191 - EPA 3550B <br />Blank (3080191-BLK1) <br />Prepared: 08/14/03 Analyzed: 08/15/03 <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 />33.5 <br />33.3 101 50-150 <br />Laboratory Control Sample (3080191 -BSI) <br />Prepared: 08/14/03 Analyzed: 08/15/03 <br />PCB -1016 <br />321 <br />33 <br />ug/kg <br />333 96 50-150 <br />PCB -1260 <br />307 <br />33 <br />333 92 50-150 <br />Surrogate: Decachlorobiphenyl <br />35.5 <br />33.3 107 50-150 <br />Matrix Spike (3080191-MS1) <br />Source: S308269-02 <br />Prepared: 08/14/03 Analyzed: 08/15/03 <br />PCB -1016 <br />310 <br />33 <br />ug/kg <br />333 ND 93 50-150 <br />PCB -1260 <br />297 <br />33 <br />333 ND 89 50-150 <br />Surrogate: Decachlorobiphenyl <br />33.4 <br />33.3 100 50-150 <br />Matrix Spike Dup (3080191-MSD1) <br />Source: S308269-02 <br />Prepared: 08/14/03 Analyzed: 08/15/03 <br />PCB -1016 <br />323 <br />33 <br />ug/kg <br />333 ND 97 50-150 4 50 <br />PCB -1260 <br />312 <br />33 <br />333 ND 94 50-150 5 50 <br />Surrogate: Decachlorobiphenyl <br />32.0 <br />33.3 96 50-150 <br />Sequoia Analytical - 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 analytical report must be reproduced in its entirety. <br />Page 25 of 29 <br />