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1 <br /> CALIFORNIA LABORATORY SERVICES <br /> Page 18 of 20 04/27/06 13 02 <br /> ' GEOLOGICAL TECHNICS INC Project Castle Motors-2nd Qtr 2006 <br /> 1101 7th St Project Number [none] CLS Work Order#:CFD0649 <br /> MODESTO,CA 95354 Project Manager Joe Angulo COC# <br /> ' Volatile Organic Compounds by EPA Method 8260B - Quahty Control <br /> ' Reporting Spike Source %RFC RPD <br /> Analyte Result Limn Units Level Result %REC Limits RPD Lttrut Notes <br /> Batch CP03172-EPA 5030 Water MS <br /> ' Blank(CP03172-BLKI) Prepared&Analy2ed 04/25/06 <br /> Di-isopropyl ether ND 050 µg/L <br /> Ethyl tert-butyl ether ND 0 50 " <br /> Methyl tert-butyl ether ND 050 <br /> tert-Amyl methyl ether ND 050 " <br /> Tert-butyl alcohol ND 50 " <br /> 1,2-Dibromoethaue(EDB) ND 050 " <br /> 1,2-Dtchloroethane ND 050 <br /> Benzene ND 050 <br /> Toluene ND 050 " <br /> Fthylbenzene ND 050ldm " <br /> ylenes(total) ND 10 " <br /> Surrogate Toluene-d8 923 100 923 71-125 <br />' LCS(CP03172-BSI) Prepared&Analyzed 04/25/06 <br /> Methyl tert-butyl ether 188 0 50 ltg/L 200 940 52-130 <br /> Surrogate Toluene-d8 945 100 945 72-125 <br /> LCS Dup(CP03172-BSD1) Prepared&Analy2ed 04/25/06 <br /> Methyl tertbutyl ether 179 050 µg/L '200 895 52-130 490 30 <br /> Surrogate Toluene-d8 948 100 948 72-125 <br />' Batch CP03184-EPA 5030 Water MS <br /> Blank(CP03184-BLKI) Prepared&Analyzed 04/26/06 <br />' <br /> Di isopropyl ether ND 050 µglL <br /> Ethyl tert-butyl ether ND 050 " <br /> Methyl tent-butyl ether ND 050 " <br /> tent-Amyl methyl ether ND 050 " <br />' Tert-butyl alcohol ND 50 " <br /> 1,2-Dtbromoethaue(EDB) ND 050 " <br /> 1,2-Dichloroethane ND 050 " <br />' Benzene ND 050 " <br /> 1 <br /> CA DOHS ELAP Accreditation/Registration Number 1233 <br /> 3249 Fitzgerald Road Rancho Cordova,CA 95742 www cahfornialab corn 916-638-7301 Fax: 916-638-4510 <br />