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885 Jams Dr <br /> 4D Sequoia MlsrganNill,CA 95037 <br /> (408)776-9600 <br /> WAnalytical FAX(409)782-6308 <br /> www requoialabs can <br /> . Stratus Environmental Inc Project ARCO#2130 MLL0779 <br /> 3330 Cameron Park Dr,Suite 550 Project Number ARCO#2130,Stockton,CA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 01/10/03 16 20 <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 3010011 -EPA 5030B[PITT <br /> Laboratory Control Sample(3010011-BS2) Prepared&Analyzed 01/03/03 <br /> Methyl tert butyl ether 189 050 ug/l 224 84 60-140 <br /> Surrogate 1,2-DCA-d4 292 11250 117 60-140 <br /> Matrix Spike(3010011-MSI) Source MLL0779-02 Prepared 01/02/03 Analyzed 01/03/03 <br /> Methyl cert-butyl ether 166 050 ug/1 224 ND 74 60-140 <br /> Surrogate 12-DCA-d4 274 11250 110 60-140 <br /> Matrix Spike Dup(3010011-MSD1) Source MLL0779-02 Prepared 01/02/03 Analyzed 01/03/03 <br /> Methyl tert-butyl ether 210 050 ug/1 224 ND 94 60-140 23 25 <br /> Surrogate 1 2-DCA-d4 258 11250 103 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 /> . Thus analytical report must be reproduced in its entirety <br /> 16 of 17 <br />