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885 Jarvis Drive <br /> Sequoia Morgan Hill CA 9503737 <br /> (408)776-9600 <br /> Analytical �rnvw scquoiFAXquoi lab 6308 <br /> aabscom <br /> Secor-Rancho Cordova(ARCO) Project ARCO#2133,Rancho Cordova,CA MMI0807 <br /> 3017 Kilgore Rd Suite 100 Project Number N/P Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 10/20/03 16 45 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %R-EC RPA <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3JO8045-EPA 5030B Modified <br /> Blank(3J08045-BLKI) Prepared&Analyzed 10/08/03 <br /> Xylenes(total) ND 050 ug/l <br /> .Surrogate 12-Dichloroethane-d4 525 Soo 105 78-129 <br /> Laboratory Control Sample(3J08045-BS1) Prepared 10/08/03 Analyzed 10/09/03 <br /> Ethanol 163 100 ug/I 200 815 31-186 <br /> tert-Butyl alcohol 13 6 20 Soo 272 0-206 0-12 <br /> Methyl tert-butyl ether 826 050 100 926 63-137 <br /> Di isopropyl ether 900 050 100 900 76-130 <br /> Ethyl tert-butyl ether 9 14 050 100 914 61-141 <br /> tert Amyl methyl ether 9 10 050 Wo 91 0 56-140 <br /> 1 2-Dichloroethane 946 050 100 946 77-136 <br /> 1,2-Dibromoethane(EDB) 102 050 100 102 77-132 <br /> etizene 9 17 050 100 91 7 78-124 <br /> oluene 989 050 100 989 78-129 <br /> Ethylbenzene 100 050 100 100 84-117 <br /> Xylenes(total) 288 050 300 960 83-125 <br /> Surrogate 12-Dichloroethane-d4 501 500 100 78-129 <br /> Laboratory Control Sample(3J08045-BS2) Prepared 10/08/03 Analyzed 10/09/03 <br /> Gasoline Range Organics(C6-C 10) 369 50 ug/1 440 83 9 70-113 <br /> Surrogate 12-Drehloroethane-d4 522 500 104 78-129 <br /> Matrix Spike(3J08045-MS1) Source MMI0807-12 Prepared 10/08/03 Analyzed 10/09/03 <br /> Gasoline Range Organics(C6-C10) 362 50 ug/l 440 ND 823 70-113 <br /> Methyl tert-butyl ether 786 050 10 1 013 765 63-137 <br /> Benzene 536 050 6 48 0 070 81 6 78-124 <br /> Toluene 29 8 050 297 029 99 4 78-129 <br /> Ethylbenzene 7 17 050 720 ND 996 84-117 <br /> Xylenes(total) 364 050 33 7 039 107 83-125 <br /> Surrogate 12-Dichloroethane-d4 544 500 109 78-129 <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 /> 16 of 22 <br />