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885 Jarvis Drive <br /> Hill CA 95037 <br /> Sequoia Morgan(408)7769600 <br /> 308 <br /> AW Analytical wwseqFAX akidab com <br /> www sequo�alabs com <br /> 0 <br /> Secor-Rancho Cordova(ARCO) Project ARCO#2133, Stockton,CA MPCO263 <br /> 3017 Kilgore Rd Suite 100 Project Number Arco#2133,Stockton,CA Reported <br /> Rancho Cordova CA,95670 Project Manager Brian Carey 03/31/06 14 03 <br /> Industrial Solvents by EPA Method 8015B - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 6C12001 - EPA 3810 Heads ace/EPA 8015E <br /> Blank(6C12001-BLKI) Prepared&Analyzed 03/12/06 <br /> Methanol ND 100 ugll <br /> Surrogate 1-pentanol 2160 2500 86 75-120 <br /> Laboratory Control Sample(6C12001-BSI)--- — - - —_ — _ -_ Prepared&Analyzed 03/12/06 <br /> Methanol 937 100 ug/1 1000 94 30-150 <br /> Surrogate 1-pentanol 2440 11�2500 98 75=110 <br />—Matrix Spike{6C1200I�MS1) Source MPC0117-06 - -_ Prepared&Analyzed 03/12/06 <br /> Methanol 908 100 ug/1 1000 ND 91 30-150 <br /> Surrogate I-pentanol 2340 " 1500 94 75-120 <br /> Matrix Spike Dup(6C12001-MSD1) Source MPC0117-06 Prepared&Analyzed 03/12/06 <br /> Methanol 994 100 ugA 1000 ND 99 30-150 9 20 <br /> Surrogate I-pentanol 2470 25010 99 75-120 <br /> Sequoia Anaiytical - Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain o <br /> cuslody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 8 of 20 <br />