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• • Sequoia 819 Striker Avenue, Suite 8 <br />Sacramento, CA 95834 <br />® (916) 921-9600 <br />Analytical www.sequoialabs.com (916) 92 1 -0100 <br />ww.sequoialabs.com <br />r - <br />Kleinfelder - Stockton Project: 1444 Mariposa S309079 <br />2825 East Myrtle Street Project Number: 34202 Reported: <br />Stockton CA, 95205 Project Manager: Francis Bean 09/09/03 16:14 <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 3090108 - EPA 3550B <br />.Blank (30901.08-BLKI) Prepared & Analyzed: 09/08/03 . <br />PCB -1016 <br />4,°CB -1221 <br />CB -1232 <br />CB-1242 <br />PCB -1248 <br />'LCB -1254. <br />'CB -1260 <br />Surrogate: Decachlorobiphenyl <br />ND <br />33 ug/kg <br />ND <br />60 <br />ND <br />33 " <br />ND <br />33 <br />ND <br />33 " <br />ND <br />33 " <br />ND <br />33 " <br />32.7 <br />33.3 <br />98 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 />L <br />Page 11 of 17 <br />4aboratory Control Sample (3090108 -BSI) <br />Prepared & Analyzed: 09/08/03 <br />CB -1016 <br />316 <br />33 <br />ug/kg <br />333 95 50-150 <br />PCB -1260 <br />300 <br />33 <br />333 90 50-150 <br />�urrogate: 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 <br />33 <br />ug/kg <br />333 ND 90 50-150 <br />'CB -1260 <br />268 <br />33 <br />11333 <br />ND 80 50-150 <br />�urrogate: Decachlorobiphenyl <br />32.4 <br />33.3 97 50-150 <br />Matrix Spike Dup (3090108-MSD1) <br />Source:'S309079-01 <br />Prepared: 09/08/03 Analyzed': 09/09/03 <br />CB -1016 <br />365 <br />33 <br />ug/kg <br />- 333 ND 110 50-150 20 50 <br />CB -1260 <br />338 <br />33 <br />333 ND 102 50-150 23 50 <br />c'urrogate: Decachlorobiphenyl <br />44.5 <br />.33.3 134 50-lM <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 />L <br />Page 11 of 17 <br />