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a - <br /> 885 Jarvis DTLVe <br /> Sequoia Mors Hill CA <br /> A95776 600 <br /> Analytical FAX equo labs c 08 <br /> • www sequmalabs com <br /> Secor-Rancho Cordova(ARCO) Project ARCO#0595,Stockton,CA MND0067 <br /> 3017 Kilgore Rd Suite 100 Project Number 38983 Reported <br /> Rancho Cordova CA,95670 Project Manager RustyBenkosky 04/19/04 17 33 <br /> Purgeable Hydrocarbons (C6-C10) & Volatile Organic Compounds by EPA method 8260B -Quality Control <br /> Sequoia Analytical-Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result limit Units Level Result %REC L[mlts RPO Limit Notes <br /> Batch 4DO9004-EPA 5030B PIT <br /> Blank(4D09004-BLK1) Prepared&Analyzed 04/09/04 <br /> Methyl testi-butyl ether ND 050 ug/l <br /> Gasoline Range Organics(C4 C12) ND 50 " <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 0 50 " <br /> Surrogate 1,2-Dichloroethane-d4 4 73 Soo 94 6 78-129 <br /> Laboratory Control Sample(411109004-11SI) Prepared&Analyzed 04/09/04 <br /> Methyl tert butyl ether 974 050 ug/I 100 974 63-137 <br /> Benzene 9 84 050 100 98 4 69-124 <br /> Toluene 948 050 100 94 8 78-129 <br /> Ethylbenzene 994 0 50 11 100 99 4 84-132 <br /> Xylenes(total) 269 050 300 897 83-137 <br /> Surrogate 1 2-Dwhloroethane-d4 459 500 918 78-129 <br /> Laboratory Control Sample(4D09004-BS2) Prepared&Analyzed 04/09/04 <br /> Gasoline Range Organics(C4-C 12) 360 50 ug/l 440 818 70-124 <br /> Surrogate 1,1-Dichloroethane d4 467 S 00 93 4 78-129 <br /> Laboratory Control Sample Dup(4D09004-BSDI) Prepared&Analyzed 04/09/04 <br /> Methyl tent butyl ether lot 050 us/[ 100 101 63-137 3 63 20 <br /> Benzene 101 050 100 101 69-124 2 61 20 <br /> Toluene 961 050 too 96 1 78-129 1 36 20 <br /> Ethylbenzene 993 050 100 993 84-132 0 101 20 <br /> Xylenes(total) 27 7 0 50 300 92 3 83-137 2 93 20 <br /> Surrogate 1 2-Dichloroethane d4 453 500 906 78-119 <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 /> This analytical report must be reproduced in its entirety <br /> Page 11 of 22 <br />