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CALIFORNIA LABORATORY SERVICES <br /> 04/26/04 08 16 <br /> ENSR-Sacramento Project Former Unocal 5098,5606 CLc W rvke�rot ,CND0604 <br /> 10411 Old Placerville Rd,Suite 210 ProjectNumber 06940-293-100 COC# 1, 2,3,4 <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 /> nalyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> atch CN03187-EPA 5030 Water MS <br /> CS(CN03187-BSI) Prepared&Analyzed 04/21/04 <br /> enzene 190 050 µg/L 200 950 60-135 <br /> hlorobenzene 164 050 200 820 60-133 <br /> 1 1-Dichloroethene 224 050 200 112 42-150 <br /> aluene 177 050 200 88 5 60-137 <br /> richloroethene 187 050 200 93 5 62-140 <br /> Surrogate 12-Dtchloroethane-d4 867 100 867 66-135 <br /> trrogafe <br /> rrogate Toluene-d8 103 100 103 72-125 <br /> 4-Bromofluorobenzene 978 100 978 73-125 <br /> CS Dup(CN03187-BSDI) Prepared&Analyzed 04/21/04 <br /> Nne 190 050 Pg/L 200 950 60-135 000 25 <br /> obenzene 165 050 200 925 60-133 0 608 25 <br /> 1,1-Dichloroethene 231 050 200 116 42-150 308 25 <br /> foluene 177 050 200 885 60-137 000 25 <br /> richloroethene 191 050 200 95 5 62-140 2 12 25 <br /> Surrogate 1 2-Dichloroethane-d4 850 100 850 66-135 <br /> urrogate Toluene-d8 103 100 103 72-125 <br /> urrogale 4-Bromofluorobenzene 985 100 985 73-125 <br /> atch CN03238- EPA 5030 Water MS <br /> lank(CN03238-BLKI) Prepared&Analyzed 04/22/04 <br /> Acetone ND 10 µg/L <br /> Benzene ND 0 50 " <br /> tromobenzene ND 0 50 <br /> romochloromethane ND 0 50 <br /> Bromodichloromethane ND 0 50 " <br /> tromoform ND 0 50 <br /> romornethane ND 10 <br /> 2-Butanone ND 10 <br /> Butvlbenzene ND 0 50 <br /> CA DOHS FLAP Accreditation/Registration Number 1233 <br /> 1249 Fitzgerald Road Rancho Cordova, CA 95742 www californialab coin 916-638-7301 Fax 916-638-4510 <br />