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885 Jarvis Drive <br /> Hill CA 95037 <br /> Sequoia Morgan(408)776-9600 <br /> ,!DVQF Analytical FAXequo 7826308 <br /> www sequoulabs.com <br /> Secor-Rancho Cordova(ARCO) Protect ARCO#2133,Rancho Cordova CA MML0761 <br /> 3017 Kilgore Rd Suite 100 Protect Number N/P Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 01/06/04 10 28 <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 Lnits Level Result %REC Limits RPD Limit Notes <br /> Batch 3L31007-EPA 5030B Modified <br /> Laboratory Control Sample(3L31007-BS2) Prepared&Analyzed 12/31/03 <br /> Methyl tert-butyl ether 799 050 ug/l 992 804 63-137 <br /> Benzene 5 52 050 640 862 69 124 <br /> Toluene 342 050 297 115 78-129 <br /> Ethylbenzene 778 050 696 112 84-132 <br /> Xylenes(total) 389 050 337 115 83-137 <br /> Gasoline Range Organics 478 50 440 109 70-113 <br /> Surrogate 12-Dichloroethane-d4 463 500 926 78-129 <br /> Laboratory Control Sample Dup(3L31007-BSD1) Prepared&Analyzed 12/31/03 <br /> Ethanol 188 100 ug/l 200 940 31-143 379 20 <br /> tent-Butyl alcohol 470 20 500 940 56-131 935 20 O 10 <br /> Methyl tert-butyl ether 962 050 100 962 63-137 4 14 20 <br /> 9i isopropyl ether 101 050 100 101 76-130 0 995 20 <br /> thyl tert-butyl ether 103 050 100 103 81-121 296 20 <br /> tert Amy]methyl ether 105 050 100 105 82-140 488 20 <br /> 1,2 Dichloroethane 104 050 100 104 77-136 l 94 20 <br /> l 2 Dibromoethane(EDB) 994 050 100 994 77 132 258 20 <br /> Benzene 9 87 050 i0 0 987 69 124 3 29 20 <br /> Toluene 999 050 10 0 999 78-129 105 20 <br /> Ethylbenzene 957 050 100 957 84-132 12 1 20 <br /> Xylenes(total) 293 050 300 977 83-137 125 20 <br /> Surrogate 1 2-Dichloroethane-d4 4 76 500 952 78-129 <br /> Laboratory Control Sample Dup(3L31007-BSD2) Prepared&Analyzed 12/31/03 <br /> Methyl tert-butyl ether 8 16 050 ug/1 992 823 63-137 2 23 20 <br /> Benzene 5 18 050 640 80 9 69-124 6 36 20 <br /> Toluene 309 050 29 7 104 78-129 101 20 <br /> Ethylbenzene 7 10 050 696 102 84-132 9 14 20 <br /> Xylenes(total) 355 050 33 7 105 83 137 9 14 20 <br /> Gasoline Range Organics 413 50 440 93 9 70 113 14 6 9 QR 02 <br /> Surrogate 12-Dichloroethane-d4 5 03 5 00 101 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 /> 7 of 8 <br />