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Sequoia <br />• . 819 Striker Ave Ste 8 <br />r - ` 5e 1lUla Sserem95934 <br />(916senta, 92 -9600 <br />`1 (916)921-9600 <br />Anaiyticai www.seq.seqFAX 6)921 -oleo <br />uoidabs.com <br />Central Valley Waste Services ProjecLWash Pad Sludge S501572 <br />P.O. Box 241001 Project Numbern/a - Reported: <br />Lodi CA, 95241 Project Manager C. Kennedy 02/11/05 10:51 <br />Total Metals by EPA 6000/7000 Series Methods - Quality Control <br />Sequoia Analytical - Sacramento <br />Reporting Spike Source %REC RPD <br />Analyte Result Limit Units Level Result %uREC Limits RPD Limit Notes <br />Batch 5010400 - EPA 3050B / EPA 6010B <br />Blank (5010400-BLK1) <br />Prepared: 01/28/05 Analyzed: 02101/05 <br />Silver <br />ND <br />2.0 <br />mg/kg <br />Thallium <br />ND <br />5.0 <br />Arsenic <br />ND <br />5.0 <br />" <br />Cadmium <br />ND <br />025 <br />" <br />Chromium <br />ND <br />025 <br />" <br />Copper <br />ND <br />0.25 <br />" <br />Nickel <br />ND <br />4.0 <br />- <br />Lead <br />ND <br />2.5 <br />Selenium <br />5.06 <br />5.0 <br />QB02 <br />Zinc <br />ND <br />0.25 <br />Antimony <br />ND <br />2.5 <br />" <br />Blank (51110400-BLK2) <br />Prepared & Analyzed: 02/01/05 <br />Thallium <br />ND <br />5.0 <br />mg/kg <br />zinc <br />ND <br />0.25 <br />Antimony <br />ND <br />2.5 <br />" <br />Lead <br />ND <br />2.5 <br />Selenium <br />ND <br />5.0 <br />" <br />Silver <br />ND <br />2.0 <br />" <br />Arsenic <br />ND <br />5.0 <br />" <br />Cadmium <br />ND <br />0.25 <br />" <br />Chromium <br />ND <br />0.25 <br />" <br />Copper <br />ND <br />0,25 <br />" <br />Nickel <br />ND <br />4.0 <br />Blank (5010400-BLK3) <br />Prepared & Analyzed: 01/02/05 <br />Nickel <br />ND <br />1.0 <br />mg/kg <br />Silver <br />ND <br />0.25 <br />" <br />Arsenic <br />ND <br />2.5 <br />" <br />Cadmium <br />ND <br />025 <br />" <br />Copper <br />ND <br />0.25 <br />" <br />Lead <br />ND <br />2.5 <br />" <br />Antimony <br />ND <br />2.5 <br />" <br />Selenium <br />ND <br />2.5 <br />Thallium <br />ND <br />5.0 <br />" <br />Zinc <br />ND <br />025 <br />" <br />Chromium <br />ND <br />0.25 <br />" <br />Sequoia Analytical - Sacramento <br />The results in this report apply to the samples analyzed in accordance with the chain of <br />basis. <br />caaaay dacument. Unless otherwise stated, results are reported on a wet weight <br />This analytical report must be reproduced in its entirety. <br />Page 5 of 9 <br />