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' CALIFORNIA LABORATORY SERVICES <br /> ' Page 3 of 4 10/28/11 12:55 <br /> ' Geocon Consultants Project: Former Vintage Car Wash <br /> 3160 Gold Valley Dr.Suite#800 Project Number: S9183-06-03 CLS Work Order#:CUJ1228 <br /> Rancho Cordova,CA 95742 Project Manager: Kevin Brown COC#: 126002 <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 CU07713-General Prep <br /> ' Blank(CU07713-BLKI) Prepared&Analyzed: 10/25/11 <br /> Hexavalent Chromium ND 1.0 gg/L <br /> LCS(CU07713-BSI) Prepared&Analyzed: 10/25/11 <br /> ' Hexavalent Chromium 4.88 LO µg/L 5.00 98 80-120 <br /> LCS_Dup(CU07713-BSDI) Prepared&Analyzed: 10/25/11 <br /> Hexavalent Chromium 4.92 1.0 pg/L 5.00 98 80-120 1 20 <br /> Matrix Spike(CU07713-MSI) Source:CUJI228-01 Prepared&Analyzed: 10/25/11 <br /> Hexavalent Chromium 14.4 1.0 pg/L 5.00 10.2 85 75-125 <br /> ' Matrix Spike Dup(CU07713-MSDI) Source: CUJ1228-01 Prepared&Analyzed: 10/25/11 <br /> Hexavalent Chromium 18.4 1.0 pg/L 5.00 10.2 165 75-125 24 25 QM-5 <br /> 1 <br /> i <br /> 1 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 />