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a— ) FAX <br /> 5037 <br /> �+ 885 Jarvis Dritie <br /> tie uoia Morgan(408 77 -960� (408)776-9600 <br /> (408)787,6308 <br /> Analytical www sequoia labs.corn <br /> Secor-Rancho Cordova(ARCO) Project ARCO#2133,Rancho Cordova,CA MMI0807 <br /> 3017 Kilgore Rd Stone 100 Project Number NIP 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 %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3JO8002-EPA 5030B Modified <br /> Laboratory Control Sample(3JO8002-B52) Prepared&Analyzed 10/08/03 <br /> Gasoline Range Organics(C6-C 10) 464 50 ug/l 440 105 70-113 <br /> Surrogate 1 2-Dtchloroethane-d4 451 500 902 78 129 <br /> Laboratory Control Sample Dup(3JO8002-BSDI) Prepared&Analyzed 10/08/03 <br /> Ethanol 205 100 ug/1 200 102 31-186 972 37 <br /> tert-Butyl alcohol 20 1 20 Soo 402 0-206 45 1 22 0-12a <br /> QR-02 <br /> Methyl ter(-butyl ether 824 050 100 824 63-137 0 121 13 <br /> Di-isopropyl ether 963 050 100 96 3 76-130 743 9 <br /> Ethyl tett-butyl ether 953 050 100 95 3 61 141 650 9 <br /> tert-Amyl methyl ether 966 050 100 966 56-140 8 30 12 <br /> l 2-Dtchloroethane 10 l 050 100 101 77-136 7 82 13 <br /> 1 2-Dibromoethane(EDB) 976 050 11 100 976 77-132 0 715 9 <br /> enzene 982 050 100 982 78-124 750 12 <br /> Toluene 10 1 050 100 101 78-129 739 10 <br /> Ethylbenzene 105 050 100 105 84-117 7 10 10 <br /> Xylenes(total) 316 050 300 105 83-125 927 11 <br /> Surrogate 12-Dichloroethane-d4 547 500 109 78-129 <br /> Laboratory Control Sample Dup(3JO8002-BSD2) Prepared&Analyzed 10/08/03 <br /> Gasoline Range Organics(C6-C 10) 397 25 ugll 440 902 70-113 156 9 QR-02 <br /> Surrogate 12-Dtchloroethane-d4 528 500 106 78-129 <br /> Batch 3JO8045-EPA 5030B Modified <br /> Blank(3JOSO45-BLKI) Prepared&Analyzed 10/08/03 <br /> Gasoline Range Organics(C6-C 10) ND 50 ug/1 <br /> Ethanol ND 100 " <br /> tert-Butyl alcohol ND 20 0-12 <br /> Methyl tert-butyl ether ND 050 " <br /> Do-isopropyl ether ND 050 <br /> Ethyl tert-butyl ether ND 050 " <br /> tert-Amyl methyl ether ND 050 <br /> 1,2-Dtchloroethane ND 050 <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> Benzene ND 050 " <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 " <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed to 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 /> 15 of 22 <br />