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v <br /> Gy � <br /> a— ) <br /> 885larvas Drive <br /> Sequoia Morgan Hill CA 950375037 <br /> 7 <br /> (408)776 9600 <br /> Analytical FAX(408)782.6308 <br /> • www sequoialabs cam <br /> Secor-Rancho Cordova(ARCO) Project ARCO#0595,Stockton,CA MND0067 <br /> 3017 Kilgore Rd Suite 100 Pr41ectNumber 38983 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Bertkosky 04/19/04 17 33 <br /> Volatile Organic Compounds by EPA Method 8260B -Quality Control <br /> Sequoia Analytical- Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lima Units Level Result %REC Limits RPD Limit Notes <br /> Batch 4DO9004-EPA 5030B PIT <br /> Laboratory Control Sample(4D09004-BSI) Prepared&Analyzed 04/09/04 <br /> Ethanol 192 100 ug/l 200 960 31-186 <br /> Cert-Butyl alcohol 469 50 500 938 0-206 <br /> Di-isopropyl ether 102 050 100 102 76-130 <br /> Ethyl tert-butyl ether 985 050 " 100 985 61-141 <br /> Cert-Amyl methyl ether 946 050 100 940 56-140 <br /> 1,2-Dichloroethane 955 050 100 95 5 77-136 <br /> 1,2-Dibromoethane(EDB) 881 050 100 88 1 77-132 <br /> Laboratory Control Sample Dup(4D09004-BSD1) Prepared&Analyzed 04/09/04 <br /> Ethanol 218 100 ugll 200 109 31-186 127 37 <br /> tert-Butyl alcohol 473 50 500 946 0-206 0 849 22 <br /> Di-isopropyl ether 106 050 100 106 76-130 3 85 9 <br /> Ethyl tent-butyl ether 103 050 " 100 103 61-141 447 9 <br /> ten-Amyl methyl ether 101 050 100 101 56-140 654 12 <br /> 1 2-Dichloroethane 100 050 100 100 77-136 460 13 <br /> 1,2 Dibromoethane(EDB) 916 050 100 91 6 77-132 390 9 <br /> Matrix Spike(4D09004-MSI) Source MND0185-01 Prepared 04/09/04 Analyzed 04/10/04 <br /> Ethanol 4070 2000 ug1] 4000 ND 102 31-186 <br /> tett-Butyl alcohol 921 100 " 1000 ND 92 1 0-206 <br /> Di-isopropyl ether 199 10 200 ND 995 76-130 <br /> Ethyl Cert butyl ether 192 10 200 ND 960 61-141 <br /> tert-Amyl methyl ether 190 10 200 68 91 6 56-140 <br /> 1,2-Dichloroethane 198 10 200 ND 990 77-126 <br /> 1,2-Dibromoethane(EDB) 176 10 200 ND 880 77-132 <br /> Matrix Spike Dup(41309004-MSDI) Source MND0185-01 Prepared 04/09/04 Analyzed 04/10/04 <br /> Ethanol 4890 2000 41 4000 ND 122 31-186 183 37 <br /> tent-Butyl alcohol 991 too 1000 ND 99 1 0-206 732 22 <br /> Di-isopropyl ether 202 10 200 ND 101 76-130 1 50 9 <br /> Ethyl tert-butyl ether 194 10 200 ND 970 61-141 104 9 <br /> Cert Amyl methyl ether 194 10 200 6 8 936 56-140 208 12 <br /> 1,2-Dichloroethane 200 10 200 ND 100 77-126 101 13 <br /> 1,2 Dibromoethanc(EDB) 179 10 200 ND 895 77 132 l 69 9 <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 an a wet weight basis <br /> This analytical report must be reproduced to its entirety <br /> Page 15 of 22 <br />