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819 Striker Avenue Sude 8 <br /> Sacramento,CA 95834 <br /> 0- 0 <br /> Sequoia (4I 6)921 9600 <br /> Analytical FAX(916)921-0100 <br /> IVwww sequoialabs eom <br /> atus Environmental Project Arco 2130,Stockton,CA <br /> 330 Cameron Park Drive, Ste 550 Project Number 2130,Stockton,CA Reported <br /> Cameron Park CA,95682 Project Manager lay Johnson 66/25/02 13 58 <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 2060248-PPA 5030B [P/Tl <br /> LCS(2060248-BS1) Prepared&Analyzed 06/20/02 <br /> i <br /> Methyl tert-butyl ether 274 050 ug/l 250 110 60-140 <br /> Surrogate 1 2-DCA-d4 286 " 250 114 60-140 <br /> Matrix Spike(2060248-MS1) Source 5206233-01 Prepared&Analyzed 06/20/02 <br /> Methyl tert-butyl ether 273 050 ugJl 250 ND 109 60-140 <br /> Surrogate 12 DCA-d4 272 112.50 109 60-140 <br /> Matrix Spike Dup(2060248-MSD1) Source S206233-01 Prepared&Analyzed 06/20/02 <br /> Methyl tert-butyl ether 268 050 uglt 250 ND 107 60-140 2 25 <br /> Surrogate 12-DCA-d4 280 250 112 60-140 <br /> uola Analytical - Sacramento The results m this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page Page 9 of 10 <br />