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COLUMBIA ANALYTICAL SERVICES, INC. <br /> QA/QC Report <br /> Client : Shaw Environmental&Infrastructure,Inc. Service Request: P0800887 <br /> Project Name: Foothill Landfill,San Joaquin County Date Collected : NA <br /> Project Number: 124591 (Ground Water) Date Received : NA <br /> Sample Matrix : WATER Date Extracted : NA <br /> Date Analyzed : 04/02/08 <br /> tMatrix Spike/Duplicate Matrix Spike Summary <br /> Sample Name: Batch QC Units : mg/L(ppm) <br /> Lab Code: P0800877-002MS P0800877-002DMS Basis : NA <br /> Test Notes <br /> Spike <br /> - CAS Relative <br /> Prep Analysis Spike Level Sample Spike Result Recovery- <br /> Result <br /> Analyte Method Method PQL MS DMS Result MS DMS MS DMS Acceptance Percent Notes <br /> Limits Difference <br /> Sulfate None 300.0 0.50 10.0 10.0 38.0 47.3 47.4 93 94 83-116 <1 <br /> � ) J <br /> Approved By � �'� Date: G <br /> V <br /> Report By:DCastillo <br />