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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client : Shaw Environmental&Infrastructure,Inc. Service Request: L0600004 <br /> Project Name: N.County LF,San Joaquin County lst Storm Event Date Collected : 01/03/06 <br /> Project Number : 791288/00005000 Date Received : 01/04/06 <br /> Sample Matrix : WATER Date Extracted : NA <br /> Date Analyzed : 01/05/06 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> Sample Name : S-1 Units : mg/L(ppm) <br /> Lab Code : L0600004-OOlMS L0600004-OOIDMS Basis : NA <br /> Test Notes <br /> Spike <br /> Prep Analysis Spike Level Sample Spike Result .Recovery CAS Relative Result <br /> Analyte Method Method Acceptance Percent <br /> Y PQL MS DMS Result MS DMS MS DMS Limits Difference Notes <br /> Chloride METHOD 300.0 5 50.0 50.0 9.90 61.0 61.5 102 103 88-117 <1 <br /> , Approved By Date <br />