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CALIFORNIA LABORATORY SERVICES <br /> 07/20/05 15 54 ' <br /> ENSR-Sacramento Project Former Unocal 5098,5400� f�VoT�cei�SrdeklynOG0409 <br /> 10411 Old Placerville Rd,Suite 210 Project Number 06940-293-120 COC# 40543 ' <br /> Sacramento,CA 95827-2508 Project Manager Katie Heckling <br /> Metals by EPA 6000/7000 Series Methods - Quality Control ' <br /> Reporting Spike Source %REC RPD ' <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch C005343-EPA 3050B <br /> Blank(CO05343-BLKI) Prepared&Analyzed 07/15/05 ' <br /> Lead ND 25 mg/kg <br /> LCS(CO05343-BS1) Prepared&Analyzed 07/15/05 ' <br /> Lead 241 25 mg/kg 250 964 75-125 <br /> LCS Dup(CO05343-BSDI) Prepared&Analyzed 07/15/05 <br /> Lead 251 25 mg/kg 250 100 75-125 407 25 , <br /> Matrix Spike(CO05343-MSI) Source COG0358-04 Prepared&Analyzed 07/15/05 <br /> Lead 286 25 mg/kg 250 88 792 75-125 <br /> Matrix Spike Dup(CO05343-MSD1) Source COG0358-04 Prepared&Analyzed 07/15/05 <br /> Lead 285 25 mg/kg 250 88 788 75-125 0 350 30 <br /> 1 <br /> 1 <br /> 1 <br /> CA DOHS FLAP Accreditation/Registration Number 1233 ' <br /> 3249 Fitzgerald Road Rancho Cordova, CA 95742 www.caltforntalab coin 916-638-7301 Fax: 916-638-4510 <br />