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CALIFORNIA LABORATORY SERVICES <br /> Page 4 of 7 03/23/07 11:34 <br /> KIFF Analytical Project: Tracy High School <br /> 2795 Second St.Suite 300 Project Number: DLT02.041 CLS Work Order#:CQC0608 <br /> Davis,CA 95616 Project Manager: Christie Dumas COC#:55413 <br /> Conventional Chemistry Parameters by APHA/EPA Methods- Quality Control <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch CQ02214-General Prep <br /> Blank(CQ02214-BLKI) Prepared&Analyzed:03/16/07 <br /> Hexavalent Chromium ND 1.0 pg/l, <br /> LCS(CQ02214-BS1) Prepared&Analyzed:03/16/07 <br /> Hexavalent Chromium 4.69 1.0 pg/L 5.00 93.8 80-120 20 <br /> LCS Dup(CQ02214-BSDI) Prepared&Analyzed:03/16/07 <br /> Hexavalent Chromium 4.67 1.0 pgfL 5.00 93.4 80-120 0.427 20 <br /> Matrix Spike(CQ02214-MSI) Source:CQC0536-01 Prepared&Analyzed:03/16/07 <br /> Hexavalent Chromium 10.0 1.0 gg/L 5.00 5.5 90.0 75-125 25 <br /> Matrix Spike Dup(CQ02214-MSDI) Source:CQC053&01 Prepared&Analyzed:03/16/07 <br /> Hexavalent Chromium 10.3 1.0 pg/L 5.00 5.5 96.0 75-125 2.96 25 <br /> CA DOHS ELAP Accreditation/Registration Number 1233 <br /> 3249 Fitzgerald Road Rancho Cordova,CA 95742 www.californialab.com 916-638-7301 Fax: 916-638-4510 <br />