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02/12/04 11:35 <br /> CH2M Hill Project: PG&E-Lathrop <br /> 155 Grand Ave.;Suite 1000 Project Number: 283984.0l.SA CLS Work Order#:CNB0296 <br /> Oakland,CA 94612 Project Manager: Bob Noyes COC#:43741 <br /> DRAFT: STLC (WET) Metals by 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 CN01121-EPA 7470A <br /> Blank(CN01121-BLKI) Prepared&Analyzed:02/11/04 <br /> Mercury ND 0.050 mg/L <br /> LCS(CN01121-BSI) Prepared&Analyzed:02/11/04 <br /> Mercury 0.0218 0.050mg/L 0.0250 87.2 75-125 <br /> LCS Dup(CN01121-BSDI) Prepared&Analyzed:02/11/04 <br /> Mercury 0.0246 0.050 mg/L 0.0250 98.4 75-125 12.1 25 <br /> Matrix Spike(CN01121-MSI) Source:CNB0296-01 Prepared&Analyzed:02/11/04 <br /> Mercury 0.0240 0.050mg/L 0.0250 0.0 96.0 75-125 <br /> Matrix Spike Dup(CN01121-MSD1) Source:CNB0296-01 Prepared&Analyzed:02/11/04 <br /> Mercury 0.0277 0.050 mg/L 0.0250 0.0 111 75-125 14.3 25 <br /> Batch CN01123-EPA 3050B <br /> Blank(CN01123-BLKI) Prepared&Analyzed:02/11/04 <br /> Lead ND 0.50 mg/L <br /> LCS(CN01123-BSI) Prepared&Analyzed:02/11/04 <br /> Lead 2.74 0.50 mg/L 2.50 110 80-120 <br /> LCS Dup(CN01123-BSD1) Prepared&Analyzed:02/11/04 <br /> Lead 2.72 0.50 mg/L 2.50 109 80-120 0.733 20 <br /> Matrix Spike(CN01123-MSI) Source:CNB0296-01 Prepared&Analyzed:02/11/04 <br /> Lead 9.70 0.50 mg/L 2.50 6.7 120 75-125 <br /> CA DOHS ELAP Accreditation/Registration Number 1233 <br />