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A 95037 <br /> �+ 885 Jarvis Dr <br /> Sequoia MirginH08ill, 7769600 <br /> (408)776 9600 <br /> . ► <br /> FAX(408) 82 08Analytical www sequoialabscern <br /> Stratus Environmental Inc Project ARCO#6100 MLL0996 <br /> 3330 Cameron Park Dr,Suite 550 Project Number ARCO#6100,Tracy,CA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 01/10/03 13 41 <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 3010082-EPA 5030B JP/T] <br /> Blank(3010082-BLK1) Prepared&Analyzed 01/06/03 <br /> Tert butyl alcohol ND 5 0 ug/1 <br /> Methyl tcrt-butyl ether NA 0 50 " <br /> Dt isopropyl ether ND 0 50 " <br /> Ethyl tent butyl ether ND 050 <br /> Ten amyl methyl ether ND 050 " <br /> Ethanol ND 50 <br /> Surrogate 12-DCA-d4 291 250 116 60-140 <br /> Laboratory Control Sample(3010082-BSI) Prepared&Analyzed 01/06/03 <br /> Methyl tert butyl ether 184 050 ugll 224 82 60-140 <br /> W-rogate 12 DCA-d4 29 6 250 118 60-140 <br /> Matrix Spike(3010082-MSI) Source 5212742-01 Prepared 01106!03 Analyzed 01/07/03 <br /> Methyl tert butyl ether 156 050 ug/l 22 4 ND 70 60-140 <br /> Surrogate 1 2-DCA-d4 28 4 1125 0 114 60 140 <br /> Matrix Spike Du (3010082-MSD!) Source 5212742-01 Prepared 0110NO3 Analyzed 01/07/03 <br /> Methyl cert-butyl ether 184 050 ug/1 224 ND 82 60 140 16 25 <br /> Surrogate 11-DCA-d4 303 1125 0 121 60-140 <br /> Sequoia Analytical-Morgan Hill 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 /> 6 of 7 <br />