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CALIFORNIA LABORATORY SERVICES <br /> 10/28/04 14 30 <br /> ENSR-Sacramento Project Fortner Unocal 5 09 8,5400 CLcs Work��odert�'�4J0188 <br /> 10411 Old Placerville Rd,Suite 210 Protect Number 06940-293-130 COC# 41209 <br /> Sacramento,CA 95827-2508 Project Manager Ben 1 Heningburg <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 CN07920-General Pre <br /> Blank(CN07920-BLKI) Prepared&Analyzed 10/13/04 <br /> Hexavalent Chromium ND l 0 pglkg <br />' LCS(CN07920-BSI) Prepared&Analyzed 10/13/04 <br /> Hexavalent Chromium 459 1 0 µg/kg 500 918 80-120 <br /> LCS Dup(CN07920-ESDI) Prepared&Analyzed 10/13/04 <br /> Hexavalent Chromium 468 1 0 lig/kg 500 936 80 120 194 20 <br /> Matrix Spike(CN07920-MSI) Source CNJO188-03 Prepared&Analyzed 10/13/04 <br /> Hexavalent Chromium 472 10 liglkg 500 ND 944 75-125 <br /> Matrix Spike Dup(CN07920-MSDI) Source CNJO188-03 Prepared&Analyzed 10/13/04 __ <br /> Hexavalent Chromium 465 1 0 µg/kg 500 ND 930 75-125 149 25 <br /> CA DOHS ELAP Accred itation/Reg istrat ton Number 1233 <br />' 3249 Fitzgerald Road Rancho Cordova, CA 95742 www californialab com 916-638-7301 Fax 916-638-4510 <br />