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CALIFORNIA LABORATORY SERVICES <br /> 08/30/04 09 41 <br /> I ENSR-Sacramento Project Former Unocal 5098 5606 pp�cS�Vg� ryic HQ555 <br /> A e ggto kt <br /> 10411 Old Placerville Rd,Suite 210 Project Number 06940-293-100 CoOrc er <br /> COC# <br /> Sacramento,CA 95827-2508 Project Manager Ben I Henrngburg <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br />' Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Dotes <br /> Batch CN06357-Volatiles <br />' Blank(CN06357-BLKI) Prepared 08/17/04 Analyzed 08/27/04 <br /> Di-isopropyl ether ND 00050 mg/kg <br /> Ethyl tert-butyl ether ND 00050 " <br /> Methyl tert-butyl ether ND 00050 " <br /> tert-Amyl methyl ether ND 00050 " <br /> Tert-butyl alcohol ND 0 050 " <br /> 1,2-Dibromoethane(EDB) ND 00050 " <br />' 1,2-Dichloroethane ND 00050 " <br /> Benzene ND 00050 " <br /> Surrogate Toluene-d8 00448 00500 89 6 60-140 <br /> Ie CS(CN06357-BSI) Prepared 08/17/04 Analyzed 08/27/04 <br /> Methyl tert-butyl ether 00428 00050 mg/kg 00500 856 60-140 <br /> Surrogate Toluene-d8 00470 00500 94 0 60-140 <br />' LCS Dup(CN06357-BSD1) Prepared 08/17/04 Analyzed 08/27/04 <br /> Methyl tert-butyl ether 00430 00050 mg/kg 00500 860 60-140 0 466 30 <br /> Surrogate Toluene-d8 00429 " 00500 858 60-140 <br />' Matrix Spike(CN06357-MSI) Source CNHO555-01 Prepared 08/17/04 Analyzed 08/27/04 <br /> Methyl tert-butyl ether 00302 00050 mg/kg 00500 ND 604 60-140 <br />' Surrogate Toluene-d8 00447 00500 894 60-140 <br /> Matrix Spike Dup(CN06357-MSDI) Source CNHQ555-01 Prepared 08/17/04 Analyzed 08/27/04 <br /> Methyl tert-butyl ether 00326 00050 mg/kg 00500 ND 652 60-140 7 64 30 <br />' Surrogate Toluene-d8 00436 00500 872 60-140 <br /> i <br />' CA DOHS FLAP Accreditatlon/Registration Number 1233 <br />' 3249 Fitzgerald Road Rancho Cordova, CA 95742 www caltfornialab com 916-638-7301 Fax- 916-638-4510 <br />