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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: Shaw Environmental&Infrastructure,Inc. Service Request : P0700376 <br /> roject Name: Corral Hollow Landfill, San Joaquin County Date Collected : 04/16/07 <br /> ct Number : 124592(Ground Water) Date Received : 04/17/07 <br /> e Matrix : WATER Date Extracted : NA <br /> Date Analyzed : 04/17/07 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> ample Name : MW-4 Units : mg/L(ppm) <br /> Lab Code : P0700376-OOIMS P0700376-OOlDMS Basis : NA <br /> est Notes <br /> Spike <br /> Prep Analysis Spike Level Sample Spike Result Recovery CAS Relative Result <br /> Acceptance Percent <br /> Inalyte Method Method PQL MS DMS Result MS DMS MS DMS Limits Difference Notes <br /> Chloride None 300.0 0.5 50.0 50.0 123 177 174 108 102 80-120 2 <br /> proved By OaA Date <br /> ort By:RWONG <br />