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10/28/2004 10:27 9166384510 CLS LABS PAGE 15 <br /> CALIFORNIA LABORATORY SERVICES <br /> 10/28/04 10:19 <br /> CH2M Hill Project PG&E-Lathrop CLS Work Order#:CNBO313 <br /> 155 Grand Ave Suite 1000 Project Number: 283984.01 <br /> Oakland CA,94612 Project Managcr. Bob Noyes COC#:43743 <br /> Gas/BTEX by GC PIDMD- Quality Control <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Nates <br /> Batch CN01.081 -EPA 5030 Soil GC <br /> Matrix Spike Dup(CN01081-MSI I) Source:CNB0313-01 Prepared&Analyzed:02/10/04 <br /> RCn7Cne 110 S.0 pg+kg 100 ND 110 51-123 0.905 30 <br /> Toluene 112 5.0 100 ND 112 61423 0.889 30 <br /> Mylbenzcnc 109 5.0 " 100 ND 109 65-124 1.82 30 <br /> Xylenes(total) 308 10 300 ND 103 66-125 0.969 30 <br /> Surrogate-' 105 100 105 70.130 <br /> STIrragat¢,0-Ch1nY0tn1UE?1C(Gas) 106 100 106 70-130 <br /> CA DOHS ELAP Accreditation/Registration Number 1233 <br /> 3249 Fitzgerald Road Rancho Cordova, CA 95742 www.californialab.com 916-638•-7301 Fax: 91.6-638-4510 <br />