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Drive <br /> Sequoia 8Hi Jarvis 5037 <br /> '�►''r`�"" Morgan Hill CA 95037 <br /> (408)776 9600 <br /> Analytical FAX 782 6308 <br /> WWW sequoiequoiaiabs coin <br /> 0 <br /> Secor-Rancho Cordova(ARCO) Project ARCO#4932,Stockton,CA MNG0371 <br /> 3017 Kilgore Rd Suite 100 Project Number 63964 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 08/03/04 16 21 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical-Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Unit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 4G23004-EPA 5030E P/T <br /> Matrix Spike(4G23004-MSI) Source MNG0375-01 Prepared&Analyzed 07/23/04 <br /> Benzene 198 25 ugll 320 170 88 78-124 <br /> Ethylbenzene 832 25 348 42 118 84-117 LM <br /> Methyl cert-butyl ether 595 25 496 34 51 63-137 LN <br /> Toluene 160 25 148 33 106 78-129 <br /> Xylenes(total) 216 25 168 20 117 83-125 <br /> Gasoline Range Organics(C4-C 12) 2920 250 2200 780 97 70-124 LM <br /> Surrogate 1 2-Dichloroethane-d4 231 250 92 78-129 <br /> Matrix Spike Dup(4G23004-MSDI) Source MNG0375-01 Prepared&Analyzed 07/23/04 <br /> Benzene 187 25 ug/1 320 170 53 78-124 6 12 LN <br /> Ethylbenzene 818 25 348 42 114 84-117 2 10 <br /> Methyl tert-butyl ether 65 6 25 496 34 64 63-137 10 13 <br /> Toluene 160 2 5 148 3 3 106 78-129 0 10 <br /> is <br /> Xylenes(total) 214 2 5 168 20 115 83-125 0 9 11 <br /> Gasoline Range Organics(C4-Cl2) 2840 250 2200 780 94 70-124 3 20 LM <br /> Surrogate 1 2-Dichloroethane-d4 2 04 250 82 78-129 <br /> Batch 4G28006-EPA 5030E PIT <br /> Blank(4G28006-BLK1) Prepared&Analyzed 07/28/04 <br /> tent-Amyl methyl ether ND 0 50 ug/i <br /> Benzene ND 050 " <br /> tent-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 050 " <br /> 1,2-Dibromoethane(EDB) ND 0 50 " <br /> 1,2-Dichloroethane ND 050 " <br /> Ethanol ND 100 " <br /> Ethyl tent-butyl ether ND 050 " <br /> Ethylbenzene ND 050 " <br /> Methyl tent-butyl ether ND 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C4-C12) ND 50 " <br /> Surrogate 1,2-Dichloroethane-d4 4 99 500 100 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 0 <br /> Page 21 of 24 <br />