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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: Slaw Environmental Service Request: L9605070 <br /> Project: U-Haul/#709-83 Date Collected: NA <br /> Sample Matrix: Soil Date Received: NA <br /> Date Extracted: NA <br /> Date Analyzed: 12/24/96 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> MTBE,BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/Modified 8015/California DHS LUFT Method <br /> Units: mg/Kg(ppm) <br /> Sample Name: BATCH QC <br /> Lab Code: L9605020-001 <br /> Percent Recovery <br /> CAS Relative <br /> Spike Level Sample Spike Result Acceptance Percent <br /> Analyte MS DMS Result MS DMS MS DMS Limits Difference <br /> Benzene 0.0800 0.0800 ND 0.0638 0.0680 80 85 39-150 6 <br /> Toluene 0.0800 0.0800 ND 0.0551 0.0555 69 69 46-148 <1 <br /> Ethylbenzene 0.0800 0.0800 ND 0.0535 0.0570 67 71 32-160 6 <br /> TPH as Gasoline 2.00 2.00 ND 1.67 1.72 84 86 70-140 3 <br /> Approved By: Date: <br /> DMSIS/120594 <br /> L9605070JD.S•8020d= 12/31/96 Page No.: <br />