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8851 ams Drive <br /> Sequoia Morgan/ C 9 <br /> (400 8)777 96006 9600 <br /> FAX(408)782-6308 <br /> Analytical www sequondabs com <br /> URS Corporation[Arco II Project ARCO#6020,Manteca,CA MN-H0330 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number N/P Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 09/16/04 12 03 <br /> Industrial Solvents by EPA Method 8015B modified - Quality Control <br /> Sequoia Analytical - Morgan H111 <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 4H17022 -EPA 3810 Heads ace <br /> Blank(4H17022-BLK1) Prepared&Analyzed 08/17/04 <br /> Methanol ND 100 ugn <br /> Surrogate 1 pentanol 2530 1500 101 62-129 <br /> Laboratory Control Sample(4HI7022-BSI) Prepared&Analyzed 08/17/04 <br /> Methanol 1020 100 ug/1 1000 102 68-130 <br /> Surrogate I pentanol 2860 " 2500 114 62-129 <br /> Matrix Spike(41117022-MSI) Source MNH0330-06 Prepared&Analyzed 08/17/04 <br /> Methanol 960 I00 ug/l 1000 ND 96 68-130 <br /> Surrogate 1 pentanol 1820 112500 113 62-129 <br /> Matrix Spike Dup(41117022-MSDI) Source MNH0330-06 Prepared&Analyzed 08/17/04 <br /> Methanol 1040 100 ug/1 1000 ND 104 68-130 8 19 <br /> surrogate 1 pentanol 3040 2500 122 62-129 <br /> i <br /> I <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chant 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 /> Page 10 of 18 <br /> I <br /> I <br />