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i <br /> Sequoia 885 Jarvis Drive <br /> Morgan Hill CA 95037 <br /> ��► (408)776-9600 <br /> Analytical <br /> • FAX equot labs08 <br /> www sequoiala6s Co.c <br /> Secor-Rancho Cordova(ARCO) Project ARCO#4932,Stockton,CA <br /> 3017 Kilgore Rd Suite 100 MNJ0793 <br /> Project Number 63964 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkoslry <br /> 11!12104 12 23 <br /> Volatile Organic Compounds by EPA Method 8260B -Quality Control <br /> Sequoia Analytical-Morgan Hill <br /> Analyst Reporting Spike Source %%LEC RPD <br /> Result Lrmlt Units Level Result %%IEC 1Am1ts RPD Limit dotes <br /> Batch 4KO3010-EPA 5030B PPT/EPA 8260B <br /> Matrix Spike Du 4K03010-MSD1) Source,MNJ0632-07 Prepared&Analyzed 11/03/04 <br /> Benzene 551 50 ug/I 640 ND 86 69-124 3 <br /> " 20 <br /> Ethylbenzene <br /> 723 50 752 ND 96 84-02 3 20 <br /> Methyl tort butyl ether 4490 50 ^ 992 3700 80 63-137 2 <br /> Toluene 24 <br /> 3050 50 ^ 3190 ND 96 78-129 5 20 <br /> Xylenes(total) 3970 50 3660 ND 108 83-137 2 <br /> Gasoline Range Organics(C4-C 12) 41200 " 20 <br /> 5000 44000 4600 83 70-124 2 20 <br /> Surrogate 1 2-Dtchloraethane d4 4 67 <br /> 500 93 78-119 <br /> Batch 4K04005-EPA 5030E PPI'1 EPA 8260B <br /> Blank(4K04005-BLKI) Prepared&Analyzed 11/04/04 <br /> tat-Amyl methyl ether ND 0 50 ug/l <br /> or e ND 050 <br /> -Butyl alcohol ND 20 ^ <br /> Dr-isopropyl ether ND 050 " <br /> 1,2-Dibromoethane(EDB) ND 0 50 " <br /> 1,2-Dichloroethane ND 050 " <br /> Ethanol ND 100 " <br /> Ethyl tat-butyl ether ND 050 " <br /> Ethylbenzene ND 050 " <br /> Methyl tett-butyl ether ND 050 " <br /> Toluene ND 050 " <br /> xylenes(total) ND 050 " <br /> thio me Range Organics(C4-C12) ND 50 <br /> Surrogate I2-Dichloroethane-d4 199 150 80 78-119 <br /> Laborata Control Sam le(4K04005-BSI) Prepared&Analyzed 11/04/04 <br /> tert-Amyl methyl ether 982 0 50 ug/I 100 98 82-140 <br /> Benzene 103 050 100 103 69-124 <br /> Wt-Butyl alcohol 505 20 50 0 101 56 131 <br /> Di-isopropyl ether 113 050 100 113 76-130 <br /> 1,2-Dibtomoethane(EDB) 983 050 10 0 98 77-132 <br /> 1,2-Dichloroethane 941 050 100 94 77 136 <br /> Ethanol 189 100 200 <br /> 94 31-143 <br /> Ethyl tent butyl ether 112 0 50 10 0 112 81 121 <br /> Ethylbenzene 115 0 50 to 0 115 84-132 <br /> Methyl tort-butyl ether 9 70 050 too 97 63 137 <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed lyzed In accordance with the chairs of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> Thu analytical report must be reproduced in its entirety <br /> Page 17 of 22 <br />