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CALIFORNIA LABORATORY SERVICES <br /> 08/04/04 16 28 <br /> ENSR-Sacramento Project Fortner Unocal 2859, 1665eEg11k`Vg1Ser gnCNG <br /> 0240 <br /> 10411 Old Placerville Rd, Suite 210 Project Number 06940-357-100 COC# 1,2,3 <br /> Sacramento,CA 95827-2508 Protect Manager Ben 1 Hentngburg <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Reporting Spice Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes ' <br /> Batch CN05426-EPA 5030 Water MS <br /> Blank(CN05426-BLKl) Prepared&Analyzed 07/12/04 ' <br /> Di-isopropyl ether ND 050 pg/L <br /> Ethyl tert-butyl ether ND 050 " <br /> Methyl tent-butyl ether ND 050 " <br /> tert-Amyl methyl ether ND 050 <br /> Tert-butyl alcohol ND 50 " <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> 1 2-Dichloroethane ND 050 ' <br /> Surrogate Toluene-d8 106 100 106 72-125 <br /> LCS(CN05426-BSI) Prepared&Analyzed 07/12/04 <br /> Methyl tert-butyl ether 212 050 pglL 200 l06 52-130 <br /> Surrogate Toluene-d8 105 11100 105 71-125 <br />�LCS Dup(CN05426-BSD1) _ Prepared&Analyzed 07/12/04 --- -- ' <br /> Methyl tert-butyl ether 208 050 pg/L 200 104 52-130 190 30 <br /> Surrogate Toluene-d8 102 100 102 72-125 <br /> I <br /> Matrix Spike(CN05426-MS1) Source CNG0240-01 Prepared&Analyzed 07/12/04 <br /> Methyl tert-butyl ether 151 050 µg/1, 200 ND 755 52-140 ' <br /> Surrogate Toluene-d8 103 11100 103 72-125 <br /> Matrix Spike Dup(CN05426-MSDI) Source CNG0240-01 Prepared&Analyzed 07/12/04 <br /> Methyl tert-butyl ether 149 050 pg/L 200 ND 745 52-140 1 33 30 <br /> 1 <br /> CA DOHS ELAP Accreditation/Registration Number 1233 <br /> 3249 Fitzgerald Road Rancho Cordova, CA 95742 www.cahfornialab com 916-638-7301 Fax- 916-638-4510 ' <br />