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lb/28/21Jb4 1b:2/ ylbb:3845lb CLS LABS PAGE 25 <br /> CALIFORNIA LABORATORY SERVICES <br /> 10/28/04 10:19 <br /> CH2M Hill Project: PG&E-Lathrop CLS Work Order#:CNI30505 <br /> 155 Grand Ave.,Suite 1000 Project Number: 283984.01 CM <br /> Oakland CA,94612 Project Managcr: Bob Noycs COC#:47344 <br /> STLC (WET) Metals by 6000/7000 Series Methods Quality Control <br /> Reporting Spike SOarCC %REC RPD <br /> Analyte Result Limit Units Lcvcl Resutt %REC Limits RPD Limit Nates <br /> Batch CN01.326-EPA 3050E <br /> Blank(CN01326-BLK1) Prepared&Analyzed:02J18/04 <br /> Lead --- - ND 0.50 mg/L <br /> LCS(CN01326-BSI) Prepared&Analyzed:02/18/04 <br /> Gid-"" 2.54 0.50 mg/L 2.50 93.6 80-120 <br /> LCS Dnp(CN01326-0.5D1) Prepared&Analyzed;02/18/04 <br /> mead -- - 2.42 0.50 mglr_ 2.50 96.8 80-120 3136 20 <br /> Matrix Spike(CN01326-MSI) Source:CNBU505-04 Prcparcd&Analyzed:02/18/04 — - <br /> -. <br /> Lcad 2.18 0.50 mg/L 2.50 0.070 84.4 75-125 <br /> Matrix Spike Dup(CN01326-MSDI) Source:CNBO505-04 Prepared&Analyzed:02/18/04 <br /> _-. - - --1.111 - ----------- _..------- - - -- <br /> Lead 2.18 0.50 mg/L 2.50 0.070 84.4 75-125 0.00 20 <br /> Batch CN01328-EPA 7470A <br /> Blank(CN 0 1328-13LK 1) Prepared&Analyzed:021I8/04_ -- <br /> _ - N-15 _ . <br /> Njcrcury 0.050 mglL <br /> LCS(CN01328-BSI) Prepared&Analyzed:02/18/04 <br /> Mctcury 0.0228 0.050 mg/L 0.0250 91.2 755-125 <br /> LCS Dup(CN01378-13SD1) Prepared &Analyzed:02/18/04 - - <br /> Mercury —-— 0.0221 0.050 mg/L 0.0250 88.4 75-125 3.12 25 <br /> Matrix Spike(CN01328-1b151) Source:CNBO505-04 Prepared&Analyzed=02/18/04 - <br /> Mercury -----0,0226 0.050 mglL 0.0250 0.0012 65.6 75-125 <br /> CA DOHS ELAS Accreditation/Registration Number 1.233 <br /> 3249 Fitzgerald Road Rancho Cordova,CA 95742 www.californtialab.com 916-638-7301 Fax: 916-638-45110 <br />