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885 Jarvis Dnw <br /> Sequoia Morgan Hilt,CA 95037 <br /> (408)776-9600 <br /> ► Analytical FAX(408) 08 <br /> www sequatalabsclabscom <br /> Secor-Rancho Cordova(ARCO) Project ARCO#4932,Stockton,CA MMJ0614 <br /> 3017 Kilgore Rd Suite 100 Project Number 38984 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 11/04/03 16 52 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical- Petaluma <br /> Reporting <br /> byre Result Li nit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-1(MMJ0614-01)Water Sampled 10/17/03 11 21 Received 10/20/03 18 40 <br /> Tert-amyl methyl ether ND 100 ugfl 100 3100778 10/30/03 10/30/03 EPA 8260E <br /> Tert-butyl alcohol ND 2000 " <br /> Di-isopropyl ether ND 100 " <br /> 1,2-13tbromoethane(EDB) ND 50 " <br /> 1,2-Dichloroethane 74 50 " <br /> Ethanol ND 10000 " <br /> Ethyl tert-butyl ether ND 100 " <br /> Methyl tert-butyl ether 2900 50 " <br /> Surrogate Dibromofluoromethane 116% 84-111 " <br /> Surrogate 11-Dichloroethane-d4 125% 74-135 " <br /> Surrogate Toluene-d8 100% 84-119 " <br /> MW-2(MMJ0614-02)Water Sampled 10/17/03 11 08 Received 10/20/03 18 40 <br /> •Tert-amyl methyl ether ND 25 ug/1 25 3100829 10/31/03 10/31/03 EPA 826013 <br /> Tert-butyl alcohol ND 500 " <br /> Di-isopropyl ether ND 25 " <br /> 1,2-Dibromoethane(EDB) ND 12 " <br /> 1,2-Dichloroethane ND 12 " <br /> Ethanol ND 2500 " <br /> Ethyl tert-butyl ether ND 25 " <br /> Methyl tert-butyl ether 850 12 <br /> Surrogate Dibromofluoromethane 110% 84-122 ~ <br /> Surrogate 1,2-Dichloroethane-d4 119% 74-135 " <br /> Surrogate Toluene-d8 101 % 84-119 " <br /> equola Analytical-Morgan Hili 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 /> 4of10 <br />