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1455 McDowell Blvd,North Ste D <br /> a— ) Sequoia Petaluma, <br /> 92-1665 <br /> Analytical FAX(707)792-0342 <br /> WWW sequoialabs corn <br /> • <br /> URS Corp-Sacramento Project Arco Site 2130,Stockton,CA P406495 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number lntrim-50293 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 07/29/04 17 56 <br /> Industrial Solvents by EPA Method 8015B modified- Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Luna Notes <br /> Batch 4F29007-EPA 3810 Headspace --_ <br /> Blank(4F29007-BLKI) Prepared&Analyzed 06/29/04 <br /> Methanol ND 100 11911 <br /> Surrogate 1 pentanol 2520 2500 101 62-129 <br /> Laboratory Control Sample(41729007-BSI) Prepared&Analyzed 06/29/04 <br /> Methanol 949 100 U&I 1000 95 68-130 <br /> Surrogate 1 pentanol 2560 2500 102 62-129 <br /> Matrix Spike(4F29007-MSI) Souret MNF0538-04R.E1 Prepared&Analyzed 06/29/04 <br /> Methanol 1490 100 ugll 1000 590 90 68-130 <br /> Surrogate 1-pentanol 2620 112500 105 62-129 <br /> Matrix Spike Dup(4F29007-MSD1) Source MNF0538-04RE1 Prepared&Analyzed 06/29/04 <br /> Methanol 1510 100 ug/l 1000 590 92 68-130 1 19 <br /> rrogate 1 pentanol 2420 2500 97 62-129 <br /> Batch 4F30011-EPA 3810 Heads ace <br /> Blank(4F30011-BLKI) Prepared&Analyzed 06/30/04 <br /> Methanol ND 100 ugll <br /> Surrogate 1 pentanol 2530 2500 101 62-129 <br /> Laboratory Control Sample(4F30011-BSI) Prepared&Analyzed 06/30/04 <br /> Methanol 970 100 ug/1 1000 97 68-130 <br /> Surrogate I pentanol 2470 2500 99 62-129 <br /> Matrix Spike(4F30011-MS1) Source P406495-14 Prepared&Analyzed 06/30/04 <br /> Methanol 1060 100 ug/l 1000 ND 106 68-130 <br /> Surrogate J pentanol 2490 112500 100 62-129 <br /> Sequoia Analytical-Petaluma 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 /> Page 32 of 41 <br />