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. <br /> Sequoia <br /> 819 Striker Avenue,Suite 8 <br /> �\i Sacramento CA 95834 <br /> (916)921-9600 <br /> FAX 92 1 Analytical www sequolalabs cam <br /> Delta Environmental Consultants(Cameron Park) Project Arco 6100,Tracy,CA <br /> 3330 Cameron Park Dr Ste 550 Project Number 6100,Tracy,CA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 04/09/02 16 49 <br /> Volatile Organic Compounds by EPA Method 8260E - Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Lmts Lcvel Result %REC Limits RPD Limit Notes <br /> Batch 2030328-EPA 5030B jP/T] <br /> Blank(2030328-BLKl) Prepared&Analyzed 03/26/02 <br /> Tertbutyl alcohol ND 50 ugll <br /> Methyl tert-butyl ether ND 050 " <br /> Di-isopropyl ether AID 050 <br /> Ethyl tert-butyl ether ND 050 <br /> Tert-amyl mcthyl ether ND 050 " <br /> Surrogate 12-DCA-d4 31 0 250 124 60-140 <br /> LCS(2030328-BSI) Prepared&. Anal}zed 03/26!02 <br /> Methyl teat-butyl ether 31 8 050 ug/l 250 127 60-140 <br /> Surrogate 1 2-DCA-d4 288 250 115 60-140 <br /> iftatriX Spike(2030328-MSI) Source 5203379-01 Prepared&Analyzed 03/26/02 <br /> ethyl tent-butyl ether 305 050 ug/3 250 ND 122 60-140 <br /> Surrogate 12-DCA-d4 286 11 250 114 60-140 <br /> Matrix Spike Dup(2030328-MSD1) Source 5203379-01 Prepared&Analyzed 03/26/02 <br /> Methyl tert-butyl ether 329 050 ugA 250 ND 132 60-140 757 25 <br /> Surrogate 1 2-DCA-d4 298 -------_-- 250 119 60-140 —_---------- -�� <br /> equoia Analytical- Sacramento The results in this report apply to the samples analyzed zn accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 7 of 9 <br />